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authorPřemysl Janouch <p.janouch@gmail.com>2014-08-10 00:01:38 +0200
committerPřemysl Janouch <p.janouch@gmail.com>2014-08-10 00:01:38 +0200
commitbd68e28b608fb74bb4823726b9f0bf6489ad94b5 (patch)
treeff082bd52d8dfde8cc8d2f223e2d9b3c63bcc770 /src
parent0da22a799a215f00ebc2be9e7cf5cc505db27148 (diff)
downloadxK-bd68e28b608fb74bb4823726b9f0bf6489ad94b5.tar.gz
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xK-bd68e28b608fb74bb4823726b9f0bf6489ad94b5.zip
Remove the `src' directory
There are not that many files, and aren't going to be.
Diffstat (limited to 'src')
-rw-r--r--src/common.c1988
-rw-r--r--src/kike.c3251
-rw-r--r--src/siphash.c87
-rw-r--r--src/siphash.h10
-rw-r--r--src/zyklonb.c1769
5 files changed, 0 insertions, 7105 deletions
diff --git a/src/common.c b/src/common.c
deleted file mode 100644
index 782572d..0000000
--- a/src/common.c
+++ /dev/null
@@ -1,1988 +0,0 @@
-/*
- * common.c: common functionality
- *
- * Copyright (c) 2014, Přemysl Janouch <p.janouch@gmail.com>
- * All rights reserved.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#define _POSIX_C_SOURCE 199309L
-#define _XOPEN_SOURCE 500
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <stdarg.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <ctype.h>
-#include <time.h>
-#include <limits.h>
-
-#include <unistd.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <fcntl.h>
-#include <poll.h>
-#include <signal.h>
-#include <strings.h>
-#include <regex.h>
-#include <libgen.h>
-#include <syslog.h>
-#include <fnmatch.h>
-
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <netdb.h>
-
-#ifndef NI_MAXHOST
-#define NI_MAXHOST 1025
-#endif // ! NI_MAXHOST
-
-#ifndef NI_MAXSERV
-#define NI_MAXSERV 32
-#endif // ! NI_MAXSERV
-
-#include <getopt.h>
-#include <openssl/ssl.h>
-#include <openssl/err.h>
-#include "siphash.h"
-
-extern char **environ;
-
-#ifdef _POSIX_MONOTONIC_CLOCK
-#define CLOCK_BEST CLOCK_MONOTONIC
-#else // ! _POSIX_MONOTIC_CLOCK
-#define CLOCK_BEST CLOCK_REALTIME
-#endif // ! _POSIX_MONOTONIC_CLOCK
-
-#if defined __GNUC__
-#define ATTRIBUTE_PRINTF(x, y) __attribute__ ((format (printf, x, y)))
-#else // ! __GNUC__
-#define ATTRIBUTE_PRINTF(x, y)
-#endif // ! __GNUC__
-
-#if defined __GNUC__ && __GNUC__ >= 4
-#define ATTRIBUTE_SENTINEL __attribute__ ((sentinel))
-#else // ! __GNUC__ || __GNUC__ < 4
-#define ATTRIBUTE_SENTINEL
-#endif // ! __GNUC__ || __GNUC__ < 4
-
-#define N_ELEMENTS(a) (sizeof (a) / sizeof ((a)[0]))
-
-#define BLOCK_START do {
-#define BLOCK_END } while (0)
-
-// --- Logging -----------------------------------------------------------------
-
-static void
-log_message_syslog (int prio, const char *quote, const char *fmt, va_list ap)
-{
- va_list va;
- va_copy (va, ap);
- int size = vsnprintf (NULL, 0, fmt, va);
- va_end (va);
- if (size < 0)
- return;
-
- char buf[size + 1];
- if (vsnprintf (buf, sizeof buf, fmt, ap) >= 0)
- syslog (prio, "%s%s", quote, buf);
-}
-
-static void
-log_message_stdio (int prio, const char *quote, const char *fmt, va_list ap)
-{
- (void) prio;
- FILE *stream = stderr;
-
- fputs (quote, stream);
- vfprintf (stream, fmt, ap);
- fputs ("\n", stream);
-}
-
-static void (*g_log_message_real) (int, const char *, const char *, va_list)
- = log_message_stdio;
-
-static void
-log_message (int priority, const char *quote, const char *fmt, ...)
- ATTRIBUTE_PRINTF (3, 4);
-
-static void
-log_message (int priority, const char *quote, const char *fmt, ...)
-{
- va_list ap;
- va_start (ap, fmt);
- g_log_message_real (priority, quote, fmt, ap);
- va_end (ap);
-}
-
-// `fatal' is reserved for unexpected failures that would harm further operation
-
-#define print_fatal(...) log_message (LOG_ERR, "fatal: ", __VA_ARGS__)
-#define print_error(...) log_message (LOG_ERR, "error: ", __VA_ARGS__)
-#define print_warning(...) log_message (LOG_WARNING, "warning: ", __VA_ARGS__)
-#define print_status(...) log_message (LOG_INFO, "-- ", __VA_ARGS__)
-
-#define exit_fatal(...) \
- BLOCK_START \
- print_fatal (__VA_ARGS__); \
- exit (EXIT_FAILURE); \
- BLOCK_END
-
-// --- Debugging and assertions ------------------------------------------------
-
-// We should check everything that may possibly fail with at least a soft
-// assertion, so that any causes for problems don't slip us by silently.
-//
-// `g_soft_asserts_are_deadly' may be useful while running inside a debugger.
-
-static bool g_debug_mode; ///< Debug messages are printed
-static bool g_soft_asserts_are_deadly; ///< soft_assert() aborts as well
-
-#define print_debug(...) \
- BLOCK_START \
- if (g_debug_mode) \
- log_message (LOG_DEBUG, "debug: ", __VA_ARGS__); \
- BLOCK_END
-
-static void
-assertion_failure_handler (bool is_fatal, const char *file, int line,
- const char *function, const char *condition)
-{
- if (is_fatal)
- {
- print_fatal ("assertion failed [%s:%d in function %s]: %s",
- file, line, function, condition);
- abort ();
- }
- else
- print_debug ("assertion failed [%s:%d in function %s]: %s",
- file, line, function, condition);
-}
-
-#define soft_assert(condition) \
- ((condition) ? true : \
- (assertion_failure_handler (g_soft_asserts_are_deadly, \
- __FILE__, __LINE__, __func__, #condition), false))
-
-#define hard_assert(condition) \
- ((condition) ? (void) 0 : \
- assertion_failure_handler (true, \
- __FILE__, __LINE__, __func__, #condition))
-
-// --- Safe memory management --------------------------------------------------
-
-// When a memory allocation fails and we need the memory, we're usually pretty
-// much fucked. Use the non-prefixed versions when there's a legitimate
-// worry that an unrealistic amount of memory may be requested for allocation.
-
-// XXX: it's not a good idea to use print_message() as it may want to allocate
-// further memory for printf() and the output streams. That may fail.
-
-static void *
-xmalloc (size_t n)
-{
- void *p = malloc (n);
- if (!p)
- exit_fatal ("malloc: %s", strerror (errno));
- return p;
-}
-
-static void *
-xcalloc (size_t n, size_t m)
-{
- void *p = calloc (n, m);
- if (!p && n && m)
- exit_fatal ("calloc: %s", strerror (errno));
- return p;
-}
-
-static void *
-xrealloc (void *o, size_t n)
-{
- void *p = realloc (o, n);
- if (!p && n)
- exit_fatal ("realloc: %s", strerror (errno));
- return p;
-}
-
-static void *
-xreallocarray (void *o, size_t n, size_t m)
-{
- if (m && n > SIZE_MAX / m)
- {
- errno = ENOMEM;
- exit_fatal ("reallocarray: %s", strerror (errno));
- }
- return xrealloc (o, n * m);
-}
-
-static char *
-xstrdup (const char *s)
-{
- return strcpy (xmalloc (strlen (s) + 1), s);
-}
-
-static char *
-xstrndup (const char *s, size_t n)
-{
- size_t size = strlen (s);
- if (n > size)
- n = size;
-
- char *copy = xmalloc (n + 1);
- memcpy (copy, s, n);
- copy[n] = '\0';
- return copy;
-}
-
-// --- Double-linked list helpers ----------------------------------------------
-
-#define LIST_HEADER(type) \
- struct type *next; \
- struct type *prev;
-
-#define LIST_PREPEND(head, link) \
- BLOCK_START \
- (link)->prev = NULL; \
- (link)->next = (head); \
- if ((link)->next) \
- (link)->next->prev = (link); \
- (head) = (link); \
- BLOCK_END
-
-#define LIST_UNLINK(head, link) \
- BLOCK_START \
- if ((link)->prev) \
- (link)->prev->next = (link)->next; \
- else \
- (head) = (link)->next; \
- if ((link)->next) \
- (link)->next->prev = (link)->prev; \
- BLOCK_END
-
-// --- Dynamically allocated string array --------------------------------------
-
-struct str_vector
-{
- char **vector;
- size_t len;
- size_t alloc;
-};
-
-static void
-str_vector_init (struct str_vector *self)
-{
- self->alloc = 4;
- self->len = 0;
- self->vector = xcalloc (sizeof *self->vector, self->alloc);
-}
-
-static void
-str_vector_free (struct str_vector *self)
-{
- unsigned i;
- for (i = 0; i < self->len; i++)
- free (self->vector[i]);
-
- free (self->vector);
- self->vector = NULL;
-}
-
-static void
-str_vector_reset (struct str_vector *self)
-{
- str_vector_free (self);
- str_vector_init (self);
-}
-
-static void
-str_vector_add_owned (struct str_vector *self, char *s)
-{
- self->vector[self->len] = s;
- if (++self->len >= self->alloc)
- self->vector = xreallocarray (self->vector,
- sizeof *self->vector, (self->alloc <<= 1));
- self->vector[self->len] = NULL;
-}
-
-static void
-str_vector_add (struct str_vector *self, const char *s)
-{
- str_vector_add_owned (self, xstrdup (s));
-}
-
-static void
-str_vector_add_args (struct str_vector *self, const char *s, ...)
- ATTRIBUTE_SENTINEL;
-
-static void
-str_vector_add_args (struct str_vector *self, const char *s, ...)
-{
- va_list ap;
-
- va_start (ap, s);
- while (s)
- {
- str_vector_add (self, s);
- s = va_arg (ap, const char *);
- }
- va_end (ap);
-}
-
-static void
-str_vector_add_vector (struct str_vector *self, char **vector)
-{
- while (*vector)
- str_vector_add (self, *vector++);
-}
-
-static void
-str_vector_remove (struct str_vector *self, size_t i)
-{
- hard_assert (i < self->len);
- free (self->vector[i]);
- memmove (self->vector + i, self->vector + i + 1,
- (self->len-- - i) * sizeof *self->vector);
-}
-
-// --- Dynamically allocated strings -------------------------------------------
-
-// Basically a string builder to abstract away manual memory management.
-
-struct str
-{
- char *str; ///< String data, null terminated
- size_t alloc; ///< How many bytes are allocated
- size_t len; ///< How long the string actually is
-};
-
-/// We don't care about allocations that are way too large for the content, as
-/// long as the allocation is below the given threshold. (Trivial heuristics.)
-#define STR_SHRINK_THRESHOLD (1 << 20)
-
-static void
-str_init (struct str *self)
-{
- self->alloc = 16;
- self->len = 0;
- self->str = strcpy (xmalloc (self->alloc), "");
-}
-
-static void
-str_free (struct str *self)
-{
- free (self->str);
- self->str = NULL;
- self->alloc = 0;
- self->len = 0;
-}
-
-static void
-str_reset (struct str *self)
-{
- str_free (self);
- str_init (self);
-}
-
-static char *
-str_steal (struct str *self)
-{
- char *str = self->str;
- self->str = NULL;
- str_free (self);
- return str;
-}
-
-static void
-str_ensure_space (struct str *self, size_t n)
-{
- // We allocate at least one more byte for the terminating null character
- size_t new_alloc = self->alloc;
- while (new_alloc <= self->len + n)
- new_alloc <<= 1;
- if (new_alloc != self->alloc)
- self->str = xrealloc (self->str, (self->alloc = new_alloc));
-}
-
-static void
-str_append_data (struct str *self, const char *data, size_t n)
-{
- str_ensure_space (self, n);
- memcpy (self->str + self->len, data, n);
- self->len += n;
- self->str[self->len] = '\0';
-}
-
-static void
-str_append_c (struct str *self, char c)
-{
- str_append_data (self, &c, 1);
-}
-
-static void
-str_append (struct str *self, const char *s)
-{
- str_append_data (self, s, strlen (s));
-}
-
-static void
-str_append_str (struct str *self, const struct str *another)
-{
- str_append_data (self, another->str, another->len);
-}
-
-static int
-str_append_vprintf (struct str *self, const char *fmt, va_list va)
-{
- va_list ap;
- int size;
-
- va_copy (ap, va);
- size = vsnprintf (NULL, 0, fmt, ap);
- va_end (ap);
-
- if (size < 0)
- return -1;
-
- va_copy (ap, va);
- str_ensure_space (self, size);
- size = vsnprintf (self->str + self->len, self->alloc - self->len, fmt, ap);
- va_end (ap);
-
- if (size > 0)
- self->len += size;
-
- return size;
-}
-
-static int
-str_append_printf (struct str *self, const char *fmt, ...)
- ATTRIBUTE_PRINTF (2, 3);
-
-static int
-str_append_printf (struct str *self, const char *fmt, ...)
-{
- va_list ap;
-
- va_start (ap, fmt);
- int size = str_append_vprintf (self, fmt, ap);
- va_end (ap);
- return size;
-}
-
-static void
-str_remove_slice (struct str *self, size_t start, size_t length)
-{
- size_t end = start + length;
- hard_assert (end <= self->len);
- memmove (self->str + start, self->str + end, self->len - end);
- self->str[self->len -= length] = '\0';
-
- // Shrink the string if the allocation becomes way too large
- if (self->alloc >= STR_SHRINK_THRESHOLD && self->len < (self->alloc >> 2))
- self->str = xrealloc (self->str, self->alloc >>= 2);
-}
-
-// --- Errors ------------------------------------------------------------------
-
-// Error reporting utilities. Inspired by GError, only much simpler.
-
-struct error
-{
- char *message; ///< Textual description of the event
-};
-
-static void
-error_set (struct error **e, const char *message, ...) ATTRIBUTE_PRINTF (2, 3);
-
-static void
-error_set (struct error **e, const char *message, ...)
-{
- if (!e)
- return;
-
- va_list ap;
- va_start (ap, message);
- int size = vsnprintf (NULL, 0, message, ap);
- va_end (ap);
-
- hard_assert (size >= 0);
-
- struct error *tmp = xmalloc (sizeof *tmp);
- tmp->message = xmalloc (size + 1);
-
- va_start (ap, message);
- size = vsnprintf (tmp->message, size + 1, message, ap);
- va_end (ap);
-
- hard_assert (size >= 0);
-
- soft_assert (*e == NULL);
- *e = tmp;
-}
-
-static void
-error_free (struct error *e)
-{
- free (e->message);
- free (e);
-}
-
-static void
-error_propagate (struct error **destination, struct error *source)
-{
- if (!destination)
- {
- error_free (source);
- return;
- }
-
- soft_assert (*destination == NULL);
- *destination = source;
-}
-
-// --- String hash map ---------------------------------------------------------
-
-// The most basic <string, managed pointer> map (or associative array).
-
-struct str_map_link
-{
- LIST_HEADER (str_map_link)
-
- void *data; ///< Payload
- size_t key_length; ///< Length of the key without '\0'
- char key[]; ///< The key for this link
-};
-
-struct str_map
-{
- struct str_map_link **map; ///< The hash table data itself
- size_t alloc; ///< Number of allocated entries
- size_t len; ///< Number of entries in the table
- void (*free) (void *); ///< Callback to destruct the payload
-
- /// Callback that transforms all key values for storage and comparison;
- /// has to behave exactly like strxfrm().
- size_t (*key_xfrm) (char *dest, const char *src, size_t n);
-};
-
-// As long as you don't remove the current entry, you can modify the map.
-// Use `link' directly to access the data.
-
-struct str_map_iter
-{
- struct str_map *map; ///< The map we're iterating
- size_t next_index; ///< Next table index to search
- struct str_map_link *link; ///< Current link
-};
-
-#define STR_MAP_MIN_ALLOC 16
-
-typedef void (*str_map_free_func) (void *);
-
-static void
-str_map_init (struct str_map *self)
-{
- self->alloc = STR_MAP_MIN_ALLOC;
- self->len = 0;
- self->free = NULL;
- self->key_xfrm = NULL;
- self->map = xcalloc (self->alloc, sizeof *self->map);
-}
-
-static void
-str_map_free (struct str_map *self)
-{
- struct str_map_link **iter, **end = self->map + self->alloc;
- struct str_map_link *link, *tmp;
-
- for (iter = self->map; iter < end; iter++)
- for (link = *iter; link; link = tmp)
- {
- tmp = link->next;
- if (self->free)
- self->free (link->data);
- free (link);
- }
-
- free (self->map);
- self->map = NULL;
-}
-
-static void
-str_map_iter_init (struct str_map_iter *self, struct str_map *map)
-{
- self->map = map;
- self->next_index = 0;
- self->link = NULL;
-}
-
-static void *
-str_map_iter_next (struct str_map_iter *self)
-{
- struct str_map *map = self->map;
- if (self->link)
- self->link = self->link->next;
- while (!self->link)
- {
- if (self->next_index >= map->alloc)
- return NULL;
- self->link = map->map[self->next_index++];
- }
- return self->link->data;
-}
-
-static uint64_t
-str_map_hash (const char *s, size_t len)
-{
- static unsigned char key[16] = "SipHash 2-4 key!";
- return siphash (key, (const void *) s, len);
-}
-
-static uint64_t
-str_map_pos (struct str_map *self, const char *s)
-{
- size_t mask = self->alloc - 1;
- return str_map_hash (s, strlen (s)) & mask;
-}
-
-static uint64_t
-str_map_link_hash (struct str_map_link *self)
-{
- return str_map_hash (self->key, self->key_length);
-}
-
-static void
-str_map_resize (struct str_map *self, size_t new_size)
-{
- struct str_map_link **old_map = self->map;
- size_t i, old_size = self->alloc;
-
- // Only powers of two, so that we don't need to compute the modulo
- hard_assert ((new_size & (new_size - 1)) == 0);
- size_t mask = new_size - 1;
-
- self->alloc = new_size;
- self->map = xcalloc (self->alloc, sizeof *self->map);
- for (i = 0; i < old_size; i++)
- {
- struct str_map_link *iter = old_map[i], *next_iter;
- while (iter)
- {
- next_iter = iter->next;
- uint64_t pos = str_map_link_hash (iter) & mask;
- LIST_PREPEND (self->map[pos], iter);
- iter = next_iter;
- }
- }
-
- free (old_map);
-}
-
-static void
-str_map_set_real (struct str_map *self, const char *key, void *value)
-{
- uint64_t pos = str_map_pos (self, key);
- struct str_map_link *iter = self->map[pos];
- for (; iter; iter = iter->next)
- {
- if (strcmp (key, iter->key))
- continue;
-
- // Storing the same data doesn't destroy it
- if (self->free && value != iter->data)
- self->free (iter->data);
-
- if (value)
- {
- iter->data = value;
- return;
- }
-
- LIST_UNLINK (self->map[pos], iter);
- free (iter);
- self->len--;
-
- // The array should be at least 1/4 full
- if (self->alloc >= (STR_MAP_MIN_ALLOC << 2)
- && self->len < (self->alloc >> 2))
- str_map_resize (self, self->alloc >> 2);
- return;
- }
-
- if (!value)
- return;
-
- if (self->len >= self->alloc)
- {
- str_map_resize (self, self->alloc << 1);
- pos = str_map_pos (self, key);
- }
-
- // Link in a new element for the given <key, value> pair
- size_t key_length = strlen (key);
- struct str_map_link *link = xmalloc (sizeof *link + key_length + 1);
- link->data = value;
- link->key_length = key_length;
- memcpy (link->key, key, key_length + 1);
-
- LIST_PREPEND (self->map[pos], link);
- self->len++;
-}
-
-static void
-str_map_set (struct str_map *self, const char *key, void *value)
-{
- if (!self->key_xfrm)
- {
- str_map_set_real (self, key, value);
- return;
- }
- char tmp[self->key_xfrm (NULL, key, 0) + 1];
- self->key_xfrm (tmp, key, sizeof tmp);
- str_map_set_real (self, tmp, value);
-}
-
-static void *
-str_map_find_real (struct str_map *self, const char *key)
-{
- struct str_map_link *iter = self->map[str_map_pos (self, key)];
- for (; iter; iter = iter->next)
- if (!strcmp (key, (const char *) iter + sizeof *iter))
- return iter->data;
- return NULL;
-}
-
-static void *
-str_map_find (struct str_map *self, const char *key)
-{
- if (!self->key_xfrm)
- return str_map_find_real (self, key);
-
- char tmp[self->key_xfrm (NULL, key, 0) + 1];
- self->key_xfrm (tmp, key, sizeof tmp);
- return str_map_find_real (self, tmp);
-}
-
-// --- File descriptor utilities -----------------------------------------------
-
-static void
-set_cloexec (int fd)
-{
- soft_assert (fcntl (fd, F_SETFD, fcntl (fd, F_GETFD) | FD_CLOEXEC) != -1);
-}
-
-static bool
-set_blocking (int fd, bool blocking)
-{
- int flags = fcntl (fd, F_GETFL);
- hard_assert (flags != -1);
-
- bool prev = !(flags & O_NONBLOCK);
- if (blocking)
- flags &= ~O_NONBLOCK;
- else
- flags |= O_NONBLOCK;
-
- hard_assert (fcntl (fd, F_SETFL, flags) != -1);
- return prev;
-}
-
-static void
-xclose (int fd)
-{
- while (close (fd) == -1)
- if (!soft_assert (errno == EINTR))
- break;
-}
-
-// --- Polling -----------------------------------------------------------------
-
-// Basically the poor man's GMainLoop/libev/libuv. It might make some sense
-// to instead use those tested and proven libraries but we don't need much
-// and it's interesting to implement.
-
-// At the moment the FD's are stored in an unsorted array. This is not ideal
-// complexity-wise but I don't think I have much of a choice with poll(),
-// and neither with epoll for that matter.
-//
-// unsorted array sorted array
-// search O(n) O(log n) [O(log log n)]
-// insert by fd O(n) O(n)
-// delete by fd O(n) O(n)
-//
-// Insertion in the unsorted array can be reduced to O(1) if I maintain a
-// bitmap of present FD's but that's still not a huge win.
-//
-// I don't expect this to be much of an issue, as there are typically not going
-// to be that many FD's to watch, and the linear approach is cache-friendly.
-
-typedef void (*poller_dispatcher_func) (const struct pollfd *, void *);
-typedef void (*poller_timer_func) (void *);
-
-#define POLLER_MIN_ALLOC 16
-
-struct poller_timer_info
-{
- int64_t when; ///< When is the timer to expire
- poller_timer_func dispatcher; ///< Event dispatcher
- void *user_data; ///< User data
-};
-
-struct poller_timers
-{
- struct poller_timer_info *info; ///< Min-heap of timers
- size_t len; ///< Number of scheduled timers
- size_t alloc; ///< Number of timers allocated
-};
-
-static void
-poller_timers_init (struct poller_timers *self)
-{
- self->alloc = POLLER_MIN_ALLOC;
- self->len = 0;
- self->info = xmalloc (self->alloc * sizeof *self->info);
-}
-
-static void
-poller_timers_free (struct poller_timers *self)
-{
- free (self->info);
-}
-
-static int64_t
-poller_timers_get_current_time (void)
-{
-#ifdef _POSIX_TIMERS
- struct timespec tp;
- hard_assert (clock_gettime (CLOCK_BEST, &tp) != -1);
- return (int64_t) tp.tv_sec * 1000 + (int64_t) tp.tv_nsec / 1000000;
-#else
- struct timeval tp;
- gettimeofday (&tp, NULL);
- return (int64_t) tp.tv_sec * 1000 + (int64_t) tp.tv_usec / 1000;
-#endif
-}
-
-static void
-poller_timers_heapify_down (struct poller_timers *self, size_t index)
-{
- typedef struct poller_timer_info info_t;
- info_t *end = self->info + self->len;
-
- while (true)
- {
- info_t *parent = self->info + index;
- info_t *left = self->info + 2 * index + 1;
- info_t *right = self->info + 2 * index + 2;
-
- info_t *largest = parent;
- if (left < end && left->when > largest->when)
- largest = left;
- if (right < end && right->when > largest->when)
- largest = right;
- if (parent == largest)
- break;
-
- info_t tmp = *parent;
- *parent = *largest;
- *largest = tmp;
-
- index = largest - self->info;
- }
-}
-
-static void
-poller_timers_remove_at_index (struct poller_timers *self, size_t index)
-{
- hard_assert (index < self->len);
- if (index == --self->len)
- return;
-
- self->info[index] = self->info[self->len];
- poller_timers_heapify_down (self, index);
-}
-
-static void
-poller_timers_dispatch (struct poller_timers *self)
-{
- int64_t now = poller_timers_get_current_time ();
- while (self->len && self->info->when <= now)
- {
- struct poller_timer_info info = *self->info;
- poller_timers_remove_at_index (self, 0);
- info.dispatcher (info.user_data);
- }
-}
-
-static void
-poller_timers_heapify_up (struct poller_timers *self, size_t index)
-{
- while (index != 0)
- {
- size_t parent = (index - 1) / 2;
- if (self->info[parent].when <= self->info[index].when)
- break;
-
- struct poller_timer_info tmp = self->info[parent];
- self->info[parent] = self->info[index];
- self->info[index] = tmp;
-
- index = parent;
- }
-}
-
-static ssize_t
-poller_timers_find (struct poller_timers *self,
- poller_timer_func dispatcher, void *data)
-{
- // NOTE: there may be duplicates.
- for (size_t i = 0; i < self->len; i++)
- if (self->info[i].dispatcher == dispatcher
- && self->info[i].user_data == data)
- return i;
- return -1;
-}
-
-static ssize_t
-poller_timers_find_by_data (struct poller_timers *self, void *data)
-{
- for (size_t i = 0; i < self->len; i++)
- if (self->info[i].user_data == data)
- return i;
- return -1;
-}
-
-static void
-poller_timers_add (struct poller_timers *self,
- poller_timer_func dispatcher, void *data, int timeout_ms)
-{
- if (self->len == self->alloc)
- self->info = xreallocarray (self->info,
- self->alloc <<= 1, sizeof *self->info);
-
- self->info[self->len] = (struct poller_timer_info) {
- .when = poller_timers_get_current_time () + timeout_ms,
- .dispatcher = dispatcher, .user_data = data };
- poller_timers_heapify_up (self, self->len++);
-}
-
-static int
-poller_timers_get_poll_timeout (struct poller_timers *self)
-{
- if (!self->len)
- return -1;
-
- int64_t timeout = self->info->when - poller_timers_get_current_time ();
- if (timeout <= 0)
- return 0;
- if (timeout > INT_MAX)
- return INT_MAX;
- return timeout;
-}
-
-#ifdef __linux__
-
-// I don't really need this, I've basically implemented this just because I can.
-
-#include <sys/epoll.h>
-
-struct poller_info
-{
- int fd; ///< Our file descriptor
- short events; ///< The poll() events we registered for
- poller_dispatcher_func dispatcher; ///< Event dispatcher
- void *user_data; ///< User data
-};
-
-struct poller
-{
- int epoll_fd; ///< The epoll FD
- struct poller_info **info; ///< Information associated with each FD
- struct epoll_event *revents; ///< Output array for epoll_wait()
- size_t len; ///< Number of polled descriptors
- size_t alloc; ///< Number of entries allocated
-
- struct poller_timers timers; ///< Timeouts
-
- /// Index of the element in `revents' that's about to be dispatched next.
- int dispatch_next;
-
- /// The total number of entries stored in `revents' by epoll_wait().
- int dispatch_total;
-};
-
-static void
-poller_init (struct poller *self)
-{
- self->epoll_fd = epoll_create (POLLER_MIN_ALLOC);
- hard_assert (self->epoll_fd != -1);
- set_cloexec (self->epoll_fd);
-
- self->len = 0;
- self->alloc = POLLER_MIN_ALLOC;
- self->info = xcalloc (self->alloc, sizeof *self->info);
- self->revents = xcalloc (self->alloc, sizeof *self->revents);
-
- poller_timers_init (&self->timers);
-
- self->dispatch_next = 0;
- self->dispatch_total = 0;
-}
-
-static void
-poller_free (struct poller *self)
-{
- for (size_t i = 0; i < self->len; i++)
- {
- struct poller_info *info = self->info[i];
- hard_assert (epoll_ctl (self->epoll_fd,
- EPOLL_CTL_DEL, info->fd, (void *) "") != -1);
- free (info);
- }
-
- poller_timers_free (&self->timers);
-
- xclose (self->epoll_fd);
- free (self->info);
- free (self->revents);
-}
-
-static ssize_t
-poller_find_by_fd (struct poller *self, int fd)
-{
- for (size_t i = 0; i < self->len; i++)
- if (self->info[i]->fd == fd)
- return i;
- return -1;
-}
-
-static void
-poller_ensure_space (struct poller *self)
-{
- if (self->len < self->alloc)
- return;
-
- self->alloc <<= 1;
- hard_assert (self->alloc != 0);
-
- self->revents = xreallocarray
- (self->revents, sizeof *self->revents, self->alloc);
- self->info = xreallocarray
- (self->info, sizeof *self->info, self->alloc);
-}
-
-static short
-poller_epoll_to_poll_events (uint32_t events)
-{
- short result = 0;
- if (events & EPOLLIN) result |= POLLIN;
- if (events & EPOLLOUT) result |= POLLOUT;
- if (events & EPOLLERR) result |= POLLERR;
- if (events & EPOLLHUP) result |= POLLHUP;
- if (events & EPOLLPRI) result |= POLLPRI;
- return result;
-}
-
-static uint32_t
-poller_poll_to_epoll_events (short events)
-{
- uint32_t result = 0;
- if (events & POLLIN) result |= EPOLLIN;
- if (events & POLLOUT) result |= EPOLLOUT;
- if (events & POLLERR) result |= EPOLLERR;
- if (events & POLLHUP) result |= EPOLLHUP;
- if (events & POLLPRI) result |= EPOLLPRI;
- return result;
-}
-
-static void
-poller_set (struct poller *self, int fd, short events,
- poller_dispatcher_func dispatcher, void *data)
-{
- ssize_t index = poller_find_by_fd (self, fd);
- bool modifying = true;
- if (index == -1)
- {
- poller_ensure_space (self);
- self->info[index = self->len++] = xcalloc (1, sizeof **self->info);
- modifying = false;
- }
-
- struct poller_info *info = self->info[index];
- info->fd = fd;
- info->events = events;
- info->dispatcher = dispatcher;
- info->user_data = data;
-
- struct epoll_event event;
- event.events = poller_poll_to_epoll_events (events);
- event.data.ptr = info;
- hard_assert (epoll_ctl (self->epoll_fd,
- modifying ? EPOLL_CTL_MOD : EPOLL_CTL_ADD, fd, &event) != -1);
-}
-
-static void
-poller_remove_from_dispatch (struct poller *self,
- const struct poller_info *info)
-{
- if (!self->dispatch_total)
- return;
-
- int i;
- for (i = self->dispatch_next; i < self->dispatch_total; i++)
- if (self->revents[i].data.ptr == info)
- break;
- if (i == self->dispatch_total)
- return;
-
- if (i != --self->dispatch_total)
- self->revents[i] = self->revents[self->dispatch_total];
-}
-
-static void
-poller_remove_at_index (struct poller *self, size_t index)
-{
- hard_assert (index < self->len);
- struct poller_info *info = self->info[index];
-
- poller_remove_from_dispatch (self, info);
- hard_assert (epoll_ctl (self->epoll_fd,
- EPOLL_CTL_DEL, info->fd, (void *) "") != -1);
-
- free (info);
- if (index != --self->len)
- self->info[index] = self->info[self->len];
-}
-
-static void
-poller_run (struct poller *self)
-{
- // Not reentrant
- hard_assert (!self->dispatch_total);
-
- int n_fds;
- do
- n_fds = epoll_wait (self->epoll_fd, self->revents, self->len,
- poller_timers_get_poll_timeout (&self->timers));
- while (n_fds == -1 && errno == EINTR);
-
- if (n_fds == -1)
- exit_fatal ("%s: %s", "epoll", strerror (errno));
-
- poller_timers_dispatch (&self->timers);
-
- self->dispatch_next = 0;
- self->dispatch_total = n_fds;
-
- while (self->dispatch_next < self->dispatch_total)
- {
- struct epoll_event *revents = self->revents + self->dispatch_next;
- struct poller_info *info = revents->data.ptr;
-
- struct pollfd pfd;
- pfd.fd = info->fd;
- pfd.revents = poller_epoll_to_poll_events (revents->events);
- pfd.events = info->events;
-
- self->dispatch_next++;
- info->dispatcher (&pfd, info->user_data);
- }
-
- self->dispatch_next = 0;
- self->dispatch_total = 0;
-}
-
-#else // !__linux__
-
-struct poller_info
-{
- poller_dispatcher_func dispatcher; ///< Event dispatcher
- void *user_data; ///< User data
-};
-
-struct poller
-{
- struct pollfd *fds; ///< Polled descriptors
- struct poller_info *fds_info; ///< Additional information for each FD
- size_t len; ///< Number of polled descriptors
- size_t alloc; ///< Number of entries allocated
-
- struct poller_timers timers; ///< Timers
- int dispatch_next; ///< The next dispatched FD or -1
-};
-
-static void
-poller_init (struct poller *self)
-{
- self->alloc = POLLER_MIN_ALLOC;
- self->len = 0;
- self->fds = xcalloc (self->alloc, sizeof *self->fds);
- self->fds_info = xcalloc (self->alloc, sizeof *self->fds_info);
- poller_timers_init (&self->timers);
- self->dispatch_next = -1;
-}
-
-static void
-poller_free (struct poller *self)
-{
- free (self->fds);
- free (self->fds_info);
- poller_timers_free (&self->timers);
-}
-
-static ssize_t
-poller_find_by_fd (struct poller *self, int fd)
-{
- for (size_t i = 0; i < self->len; i++)
- if (self->fds[i].fd == fd)
- return i;
- return -1;
-}
-
-static void
-poller_ensure_space (struct poller *self)
-{
- if (self->len < self->alloc)
- return;
-
- self->alloc <<= 1;
- self->fds = xreallocarray (self->fds, sizeof *self->fds, self->alloc);
- self->fds_info = xreallocarray
- (self->fds_info, sizeof *self->fds_info, self->alloc);
-}
-
-static void
-poller_set (struct poller *self, int fd, short events,
- poller_dispatcher_func dispatcher, void *data)
-{
- ssize_t index = poller_find_by_fd (self, fd);
- if (index == -1)
- {
- poller_ensure_space (self);
- index = self->len++;
- }
-
- struct pollfd *new_entry = self->fds + index;
- memset (new_entry, 0, sizeof *new_entry);
- new_entry->fd = fd;
- new_entry->events = events;
-
- self->fds_info[self->len] = (struct poller_info) { dispatcher, data };
-}
-
-static void
-poller_remove_at_index (struct poller *self, size_t index)
-{
- hard_assert (index < self->len);
- if (index == --self->len)
- return;
-
- // Make sure that we don't disrupt the dispatch loop; kind of crude
- if ((int) index < self->dispatch_next)
- {
- memmove (self->fds + index, self->fds + index + 1,
- (self->len - index) * sizeof *self->fds);
- memmove (self->fds_info + index, self->fds_info + index + 1,
- (self->len - index) * sizeof *self->fds_info);
- self->dispatch_next--;
- }
- else
- {
- self->fds[index] = self->fds[self->len];
- self->fds_info[index] = self->fds_info[self->len];
- }
-}
-
-static void
-poller_run (struct poller *self)
-{
- // Not reentrant
- hard_assert (self->dispatch_next == -1);
-
- int result;
- do
- result = poll (self->fds, self->len,
- poller_timers_get_poll_timeout (&self->timers));
- while (result == -1 && errno == EINTR);
-
- if (result == -1)
- exit_fatal ("%s: %s", "poll", strerror (errno));
-
- poller_timers_dispatch (&self->timers);
-
- for (int i = 0; i < (int) self->len; )
- {
- struct pollfd pfd = self->fds[i];
- if (!pfd.revents)
- continue;
-
- struct poller_info *info = self->fds_info + i;
- self->dispatch_next = ++i;
- info->dispatcher (&pfd, info->user_data);
- i = self->dispatch_next;
- }
-
- self->dispatch_next = -1;
-}
-
-#endif // !__linux__
-
-// --- Utilities ---------------------------------------------------------------
-
-static void
-split_str_ignore_empty (const char *s, char delimiter, struct str_vector *out)
-{
- const char *begin = s, *end;
-
- while ((end = strchr (begin, delimiter)))
- {
- if (begin != end)
- str_vector_add_owned (out, xstrndup (begin, end - begin));
- begin = ++end;
- }
-
- if (*begin)
- str_vector_add (out, begin);
-}
-
-static char *
-strip_str_in_place (char *s, const char *stripped_chars)
-{
- char *end = s + strlen (s);
- while (end > s && strchr (stripped_chars, end[-1]))
- *--end = '\0';
-
- char *start = s + strspn (s, stripped_chars);
- if (start > s)
- memmove (s, start, end - start + 1);
- return s;
-}
-
-static char *
-join_str_vector (const struct str_vector *v, char delimiter)
-{
- if (!v->len)
- return xstrdup ("");
-
- struct str result;
- str_init (&result);
- str_append (&result, v->vector[0]);
- for (size_t i = 1; i < v->len; i++)
- str_append_printf (&result, "%c%s", delimiter, v->vector[i]);
- return str_steal (&result);
-}
-
-static char *xstrdup_printf (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
-
-static char *
-xstrdup_printf (const char *format, ...)
-{
- va_list ap;
- struct str tmp;
- str_init (&tmp);
- va_start (ap, format);
- str_append_vprintf (&tmp, format, ap);
- va_end (ap);
- return str_steal (&tmp);
-}
-
-static bool
-str_append_env_path (struct str *output, const char *var, bool only_absolute)
-{
- const char *value = getenv (var);
-
- if (!value || (only_absolute && *value != '/'))
- return false;
-
- str_append (output, value);
- return true;
-}
-
-static void
-get_xdg_home_dir (struct str *output, const char *var, const char *def)
-{
- str_reset (output);
- if (!str_append_env_path (output, var, true))
- {
- str_append_env_path (output, "HOME", false);
- str_append_c (output, '/');
- str_append (output, def);
- }
-}
-
-static void
-get_xdg_config_dirs (struct str_vector *out)
-{
- struct str config_home;
- str_init (&config_home);
- get_xdg_home_dir (&config_home, "XDG_CONFIG_HOME", ".config");
- str_vector_add (out, config_home.str);
- str_free (&config_home);
-
- const char *xdg_config_dirs;
- if ((xdg_config_dirs = getenv ("XDG_CONFIG_DIRS")))
- split_str_ignore_empty (xdg_config_dirs, ':', out);
-}
-
-static char *
-resolve_config_filename (const char *filename)
-{
- // Absolute path is absolute
- if (*filename == '/')
- return xstrdup (filename);
-
- struct str_vector paths;
- str_vector_init (&paths);
- get_xdg_config_dirs (&paths);
-
- struct str file;
- str_init (&file);
-
- char *result = NULL;
- for (unsigned i = 0; i < paths.len; i++)
- {
- // As per spec, relative paths are ignored
- if (*paths.vector[i] != '/')
- continue;
-
- str_reset (&file);
- str_append_printf (&file, "%s/" PROGRAM_NAME "/%s",
- paths.vector[i], filename);
-
- struct stat st;
- if (!stat (file.str, &st))
- {
- result = str_steal (&file);
- break;
- }
- }
-
- str_vector_free (&paths);
- str_free (&file);
- return result;
-}
-
-static bool
-ensure_directory_existence (const char *path, struct error **e)
-{
- struct stat st;
-
- if (stat (path, &st))
- {
- if (mkdir (path, S_IRWXU | S_IRWXG | S_IRWXO))
- {
- error_set (e, "cannot create directory `%s': %s",
- path, strerror (errno));
- return false;
- }
- }
- else if (!S_ISDIR (st.st_mode))
- {
- error_set (e, "cannot create directory `%s': %s",
- path, "file exists but is not a directory");
- return false;
- }
- return true;
-}
-
-static bool
-mkdir_with_parents (char *path, struct error **e)
-{
- char *p = path;
-
- // XXX: This is prone to the TOCTTOU problem. The solution would be to
- // rewrite the function using the {mkdir,fstat}at() functions from
- // POSIX.1-2008, ideally returning a file descriptor to the open
- // directory, with the current code as a fallback. Or to use chdir().
- while ((p = strchr (p + 1, '/')))
- {
- *p = '\0';
- bool success = ensure_directory_existence (path, e);
- *p = '/';
-
- if (!success)
- return false;
- }
-
- return ensure_directory_existence (path, e);
-}
-
-static bool
-set_boolean_if_valid (bool *out, const char *s)
-{
- if (!strcasecmp (s, "yes")) *out = true;
- else if (!strcasecmp (s, "no")) *out = false;
- else if (!strcasecmp (s, "on")) *out = true;
- else if (!strcasecmp (s, "off")) *out = false;
- else if (!strcasecmp (s, "true")) *out = true;
- else if (!strcasecmp (s, "false")) *out = false;
- else return false;
-
- return true;
-}
-
-static bool
-xstrtoul (unsigned long *out, const char *s, int base)
-{
- char *end;
- errno = 0;
- *out = strtoul (s, &end, base);
- return errno == 0 && !*end && end != s;
-}
-
-static bool
-read_line (FILE *fp, struct str *s)
-{
- int c;
- bool at_end = true;
-
- str_reset (s);
- while ((c = fgetc (fp)) != EOF)
- {
- at_end = false;
- if (c == '\r')
- continue;
- if (c == '\n')
- break;
- str_append_c (s, c);
- }
-
- return !at_end;
-}
-
-#define XSSL_ERROR_TRY_AGAIN INT_MAX
-
-/// A small wrapper around SSL_get_error() to simplify further handling
-static int
-xssl_get_error (SSL *ssl, int result, const char **error_info)
-{
- int error = SSL_get_error (ssl, result);
- switch (error)
- {
- case SSL_ERROR_NONE:
- case SSL_ERROR_ZERO_RETURN:
- case SSL_ERROR_WANT_READ:
- case SSL_ERROR_WANT_WRITE:
- return error;
- case SSL_ERROR_SYSCALL:
- if ((error = ERR_get_error ()))
- *error_info = ERR_error_string (error, NULL);
- else if (result == 0)
- // An EOF that's not according to the protocol is still an EOF
- return SSL_ERROR_ZERO_RETURN;
- else
- {
- if (errno == EINTR)
- return XSSL_ERROR_TRY_AGAIN;
- *error_info = strerror (errno);
- }
- return SSL_ERROR_SSL;
- default:
- if ((error = ERR_get_error ()))
- *error_info = ERR_error_string (error, NULL);
- else
- *error_info = "Unknown error";
- return SSL_ERROR_SSL;
- }
-}
-
-// --- Regular expressions -----------------------------------------------------
-
-static regex_t *
-regex_compile (const char *regex, int flags, struct error **e)
-{
- regex_t *re = xmalloc (sizeof *re);
- int err = regcomp (re, regex, flags);
- if (!err)
- return re;
-
- char buf[regerror (err, re, NULL, 0)];
- regerror (err, re, buf, sizeof buf);
-
- free (re);
- error_set (e, "%s: %s", "failed to compile regular expression", buf);
- return NULL;
-}
-
-static void
-regex_free (void *regex)
-{
- regfree (regex);
- free (regex);
-}
-
-// The cost of hashing a string is likely to be significantly smaller than that
-// of compiling the whole regular expression anew, so here is a simple cache.
-// Adding basic support for subgroups is easy: check `re_nsub' and output into
-// a `struct str_vector' (if all we want is the substrings).
-
-static void
-regex_cache_init (struct str_map *cache)
-{
- str_map_init (cache);
- cache->free = regex_free;
-}
-
-static bool
-regex_cache_match (struct str_map *cache, const char *regex, int flags,
- const char *s, struct error **e)
-{
- regex_t *re = str_map_find (cache, regex);
- if (!re)
- {
- re = regex_compile (regex, flags, e);
- if (!re)
- return false;
- str_map_set (cache, regex, re);
- }
- return regexec (re, s, 0, NULL, 0) != REG_NOMATCH;
-}
-
-// --- IRC utilities -----------------------------------------------------------
-
-struct irc_message
-{
- struct str_map tags; ///< IRC 3.2 message tags
- char *prefix; ///< Message prefix
- char *command; ///< IRC command
- struct str_vector params; ///< Command parameters
-};
-
-static void
-irc_parse_message_tags (const char *tags, struct str_map *out)
-{
- struct str_vector v;
- str_vector_init (&v);
- split_str_ignore_empty (tags, ';', &v);
-
- for (size_t i = 0; i < v.len; i++)
- {
- char *key = v.vector[i], *equal_sign = strchr (key, '=');
- if (equal_sign)
- {
- *equal_sign = '\0';
- str_map_set (out, key, xstrdup (equal_sign + 1));
- }
- else
- str_map_set (out, key, xstrdup (""));
- }
-
- str_vector_free (&v);
-}
-
-static void
-irc_parse_message (struct irc_message *msg, const char *line)
-{
- str_map_init (&msg->tags);
- msg->tags.free = free;
-
- msg->prefix = NULL;
- msg->command = NULL;
- str_vector_init (&msg->params);
-
- // IRC 3.2 message tags
- if (*line == '@')
- {
- size_t tags_len = strcspn (++line, " ");
- char *tags = xstrndup (line, tags_len);
- irc_parse_message_tags (tags, &msg->tags);
- free (tags);
-
- line += tags_len;
- while (*line == ' ')
- line++;
- }
-
- // Prefix
- if (*line == ':')
- {
- size_t prefix_len = strcspn (++line, " ");
- msg->prefix = xstrndup (line, prefix_len);
- line += prefix_len;
- }
-
- // Command name
- {
- while (*line == ' ')
- line++;
-
- size_t cmd_len = strcspn (line, " ");
- msg->command = xstrndup (line, cmd_len);
- line += cmd_len;
- }
-
- // Arguments
- while (true)
- {
- while (*line == ' ')
- line++;
-
- if (*line == ':')
- {
- str_vector_add (&msg->params, ++line);
- break;
- }
-
- size_t param_len = strcspn (line, " ");
- if (!param_len)
- break;
-
- str_vector_add_owned (&msg->params, xstrndup (line, param_len));
- line += param_len;
- }
-}
-
-static void
-irc_free_message (struct irc_message *msg)
-{
- str_map_free (&msg->tags);
- free (msg->prefix);
- free (msg->command);
- str_vector_free (&msg->params);
-}
-
-static void
-irc_process_buffer (struct str *buf,
- void (*callback)(const struct irc_message *, const char *, void *),
- void *user_data)
-{
- char *start = buf->str, *end = start + buf->len;
- for (char *p = start; p + 1 < end; p++)
- {
- // Split the input on newlines
- if (p[0] != '\r' || p[1] != '\n')
- continue;
-
- *p = 0;
-
- struct irc_message msg;
- irc_parse_message (&msg, start);
- callback (&msg, start, user_data);
- irc_free_message (&msg);
-
- start = p + 2;
- }
-
- // XXX: we might want to just advance some kind of an offset to avoid
- // moving memory around unnecessarily.
- str_remove_slice (buf, 0, start - buf->str);
-}
-
-static int
-irc_tolower (int c)
-{
- if (c == '[') return '{';
- if (c == ']') return '}';
- if (c == '\\') return '|';
- if (c == '~') return '^';
- return c >= 'A' && c <= 'Z' ? c + ('a' - 'A') : c;
-}
-
-static size_t
-irc_strxfrm (char *dest, const char *src, size_t n)
-{
- size_t len = strlen (src);
- while (n-- && (*dest++ = irc_tolower (*src++)))
- ;
- return len;
-}
-
-static int
-irc_strcmp (const char *a, const char *b)
-{
- int x;
- while (*a || *b)
- if ((x = irc_tolower (*a++) - irc_tolower (*b++)))
- return x;
- return 0;
-}
-
-static int
-irc_fnmatch (const char *pattern, const char *string)
-{
- size_t pattern_size = strlen (pattern) + 1;
- size_t string_size = strlen (string) + 1;
- char x_pattern[pattern_size], x_string[string_size];
- irc_strxfrm (x_pattern, pattern, pattern_size);
- irc_strxfrm (x_string, string, string_size);
- return fnmatch (x_pattern, x_string, 0);
-}
-
-// --- Configuration -----------------------------------------------------------
-
-// The keys are stripped of surrounding whitespace, the values are not.
-
-struct config_item
-{
- const char *key;
- const char *default_value;
- const char *description;
-};
-
-static void
-load_config_defaults (struct str_map *config, const struct config_item *table)
-{
- for (; table->key != NULL; table++)
- if (table->default_value)
- str_map_set (config, table->key, xstrdup (table->default_value));
- else
- str_map_set (config, table->key, NULL);
-}
-
-static bool
-read_config_file (struct str_map *config, struct error **e)
-{
- char *filename = resolve_config_filename (PROGRAM_NAME ".conf");
- if (!filename)
- return true;
-
- FILE *fp = fopen (filename, "r");
- if (!fp)
- {
- error_set (e, "could not open `%s' for reading: %s",
- filename, strerror (errno));
- return false;
- }
-
- struct str line;
- str_init (&line);
-
- bool errors = false;
- for (unsigned line_no = 1; read_line (fp, &line); line_no++)
- {
- char *start = line.str;
- if (*start == '#')
- continue;
-
- while (isspace (*start))
- start++;
-
- char *end = strchr (start, '=');
- if (end)
- {
- char *value = end + 1;
- do
- *end = '\0';
- while (isspace (*--end));
-
- str_map_set (config, start, xstrdup (value));
- }
- else if (*start)
- {
- error_set (e, "line %u in config: %s", line_no, "malformed input");
- errors = true;
- break;
- }
- }
-
- str_free (&line);
- fclose (fp);
- return !errors;
-}
-
-static char *
-write_default_config (const char *filename, const char *prolog,
- const struct config_item *table, struct error **e)
-{
- struct str path, base;
-
- str_init (&path);
- str_init (&base);
-
- if (filename)
- {
- char *tmp = xstrdup (filename);
- str_append (&path, dirname (tmp));
- strcpy (tmp, filename);
- str_append (&base, basename (tmp));
- free (tmp);
- }
- else
- {
- get_xdg_home_dir (&path, "XDG_CONFIG_HOME", ".config");
- str_append (&path, "/" PROGRAM_NAME);
- str_append (&base, PROGRAM_NAME ".conf");
- }
-
- if (!mkdir_with_parents (path.str, e))
- goto error;
-
- str_append_c (&path, '/');
- str_append_str (&path, &base);
-
- FILE *fp = fopen (path.str, "w");
- if (!fp)
- {
- error_set (e, "could not open `%s' for writing: %s",
- path.str, strerror (errno));
- goto error;
- }
-
- if (prolog)
- fputs (prolog, fp);
-
- errno = 0;
- for (; table->key != NULL; table++)
- {
- fprintf (fp, "# %s\n", table->description);
- if (table->default_value)
- fprintf (fp, "%s=%s\n", table->key, table->default_value);
- else
- fprintf (fp, "#%s=\n", table->key);
- }
- fclose (fp);
- if (errno)
- {
- error_set (e, "writing to `%s' failed: %s", path.str, strerror (errno));
- goto error;
- }
-
- str_free (&base);
- return str_steal (&path);
-
-error:
- str_free (&base);
- str_free (&path);
- return NULL;
-
-}
-
-static void
-call_write_default_config (const char *hint, const struct config_item *table)
-{
- static const char *prolog =
- "# " PROGRAM_NAME " " PROGRAM_VERSION " configuration file\n"
- "#\n"
- "# Relative paths are searched for in ${XDG_CONFIG_HOME:-~/.config}\n"
- "# /" PROGRAM_NAME " as well as in $XDG_CONFIG_DIRS/" PROGRAM_NAME "\n"
- "\n";
-
- struct error *e = NULL;
- char *filename = write_default_config (hint, prolog, table, &e);
- if (!filename)
- {
- print_error ("%s", e->message);
- error_free (e);
- exit (EXIT_FAILURE);
- }
- print_status ("configuration written to `%s'", filename);
- free (filename);
-}
diff --git a/src/kike.c b/src/kike.c
deleted file mode 100644
index f3c4f17..0000000
--- a/src/kike.c
+++ /dev/null
@@ -1,3251 +0,0 @@
-/*
- * kike.c: the experimental IRC daemon
- *
- * Copyright (c) 2014, Přemysl Janouch <p.janouch@gmail.com>
- * All rights reserved.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#define PROGRAM_NAME "kike"
-#define PROGRAM_VERSION "alpha"
-
-#include "common.c"
-#include <nl_types.h>
-
-// --- Configuration (application-specific) ------------------------------------
-
-static struct config_item g_config_table[] =
-{
- { "server_name", NULL, "Server name" },
- { "server_info", "My server", "Brief server description" },
- { "motd", NULL, "MOTD filename" },
- { "catalog", NULL, "catgets localization catalog" },
-
- { "bind_host", NULL, "Address of the IRC server" },
- { "bind_port", "6667", "Port of the IRC server" },
- { "ssl_cert", NULL, "Server SSL certificate (PEM)" },
- { "ssl_key", NULL, "Server SSL private key (PEM)" },
-
- { "operators", NULL, "IRCop SSL cert. fingerprints" },
-
- { "max_connections", "0", "Global connection limit" },
- { "ping_interval", "180", "Interval between PING's (sec)" },
- { NULL, NULL, NULL }
-};
-
-// --- Signals -----------------------------------------------------------------
-
-static int g_signal_pipe[2]; ///< A pipe used to signal... signals
-
-/// Program termination has been requested by a signal
-static volatile sig_atomic_t g_termination_requested;
-
-static void
-sigterm_handler (int signum)
-{
- (void) signum;
-
- g_termination_requested = true;
-
- int original_errno = errno;
- if (write (g_signal_pipe[1], "t", 1) == -1)
- soft_assert (errno == EAGAIN);
- errno = original_errno;
-}
-
-static void
-setup_signal_handlers (void)
-{
- if (pipe (g_signal_pipe) == -1)
- exit_fatal ("%s: %s", "pipe", strerror (errno));
-
- set_cloexec (g_signal_pipe[0]);
- set_cloexec (g_signal_pipe[1]);
-
- // So that the pipe cannot overflow; it would make write() block within
- // the signal handler, which is something we really don't want to happen.
- // The same holds true for read().
- set_blocking (g_signal_pipe[0], false);
- set_blocking (g_signal_pipe[1], false);
-
- signal (SIGPIPE, SIG_IGN);
-
- struct sigaction sa;
- sa.sa_flags = SA_RESTART;
- sigemptyset (&sa.sa_mask);
- sa.sa_handler = sigterm_handler;
- if (sigaction (SIGINT, &sa, NULL) == -1
- || sigaction (SIGTERM, &sa, NULL) == -1)
- exit_fatal ("%s: %s", "sigaction", strerror (errno));
-}
-
-// --- IRC token validation ----------------------------------------------------
-
-// Use the enum only if applicable and a simple boolean isn't sufficient.
-
-enum validation_result
-{
- VALIDATION_OK,
- VALIDATION_ERROR_EMPTY,
- VALIDATION_ERROR_TOO_LONG,
- VALIDATION_ERROR_INVALID
-};
-
-// Everything as per RFC 2812
-#define IRC_MAX_NICKNAME 9
-#define IRC_MAX_HOSTNAME 63
-#define IRC_MAX_CHANNEL_NAME 50
-#define IRC_MAX_MESSAGE_LENGTH 510
-
-static bool
-irc_regex_match (const char *regex, const char *s)
-{
- static struct str_map cache;
- static bool initialized;
-
- if (!initialized)
- {
- regex_cache_init (&cache);
- initialized = true;
- }
-
- struct error *e = NULL;
- bool result = regex_cache_match (&cache, regex,
- REG_EXTENDED | REG_NOSUB, s, &e);
- hard_assert (!e);
- return result;
-}
-
-static const char *
-irc_validate_to_str (enum validation_result result)
-{
- switch (result)
- {
- case VALIDATION_OK: return "success";
- case VALIDATION_ERROR_EMPTY: return "the value is empty";
- case VALIDATION_ERROR_INVALID: return "invalid format";
- case VALIDATION_ERROR_TOO_LONG: return "the value is too long";
- default: abort ();
- }
-}
-
-// Anything to keep it as short as possible
-#define SN "[0-9A-Za-z][-0-9A-Za-z]*[0-9A-Za-z]*"
-#define N4 "[0-9]{1,3}"
-#define N6 "[0-9ABCDEFabcdef]{1,}"
-
-#define LE "A-Za-z"
-#define SP "][\\\\`_^{|}"
-
-static enum validation_result
-irc_validate_hostname (const char *hostname)
-{
- if (!*hostname)
- return VALIDATION_ERROR_EMPTY;
- if (!irc_regex_match ("^" SN "(\\." SN ")*$", hostname))
- return VALIDATION_ERROR_INVALID;
- if (strlen (hostname) > IRC_MAX_HOSTNAME)
- return VALIDATION_ERROR_TOO_LONG;
- return VALIDATION_OK;
-}
-
-static bool
-irc_is_valid_hostaddr (const char *hostaddr)
-{
- if (irc_regex_match ("^" N4 "\\." N4 "\\." N4 "\\." N4 "$", hostaddr)
- || irc_regex_match ("^" N6 ":" N6 ":" N6 ":" N6 ":"
- N6 ":" N6 ":" N6 ":" N6 "$", hostaddr)
- || irc_regex_match ("^0:0:0:0:0:(0|[Ff]{4}):"
- N4 "\\." N4 "\\." N4 "\\." N4 "$", hostaddr))
- return true;
- return false;
-}
-
-static bool
-irc_is_valid_host (const char *host)
-{
- return irc_validate_hostname (host) == VALIDATION_OK
- || irc_is_valid_hostaddr (host);
-}
-
-static bool
-irc_is_valid_user (const char *user)
-{
- return irc_regex_match ("^[^\r\n @]+$", user);
-}
-
-static bool
-irc_validate_nickname (const char *nickname)
-{
- if (!*nickname)
- return VALIDATION_ERROR_EMPTY;
- if (!irc_regex_match ("^[" SP LE "][" SP LE "0-9-]*$", nickname))
- return VALIDATION_ERROR_INVALID;
- if (strlen (nickname) > IRC_MAX_NICKNAME)
- return VALIDATION_ERROR_TOO_LONG;
- return VALIDATION_OK;
-}
-
-static enum validation_result
-irc_validate_channel_name (const char *channel_name)
-{
- if (!*channel_name)
- return VALIDATION_ERROR_EMPTY;
- if (*channel_name != '#' || strpbrk (channel_name, "\7\r\n ,:"))
- return VALIDATION_ERROR_INVALID;
- if (strlen (channel_name) > IRC_MAX_CHANNEL_NAME)
- return VALIDATION_ERROR_TOO_LONG;
- return VALIDATION_OK;
-}
-
-static bool
-irc_is_valid_key (const char *key)
-{
- // XXX: should be 7-bit as well but whatever
- return irc_regex_match ("^[^\r\n\f\t\v ]{1,23}$", key);
-}
-
-#undef SN
-#undef N4
-#undef N6
-
-#undef LE
-#undef SP
-
-static bool
-irc_is_valid_user_mask (const char *mask)
-{
- return irc_regex_match ("^[^!@]+![^!@]+@[^@!]+$", mask);
-}
-
-static bool
-irc_is_valid_fingerprint (const char *fp)
-{
- return irc_regex_match ("^[a-fA-F0-9]{2}(:[a-fA-F0-9]{2}){19}$", fp);
-}
-
-// --- Clients (equals users) --------------------------------------------------
-
-#define IRC_SUPPORTED_USER_MODES "aiwros"
-
-enum
-{
- IRC_USER_MODE_INVISIBLE = (1 << 0),
- IRC_USER_MODE_RX_WALLOPS = (1 << 1),
- IRC_USER_MODE_RESTRICTED = (1 << 2),
- IRC_USER_MODE_OPERATOR = (1 << 3),
- IRC_USER_MODE_RX_SERVER_NOTICES = (1 << 4)
-};
-
-struct client
-{
- LIST_HEADER (client)
- struct server_context *ctx; ///< Server context
-
- int socket_fd; ///< The TCP socket
- struct str read_buffer; ///< Unprocessed input
- struct str write_buffer; ///< Output yet to be sent out
-
- bool initialized; ///< Has any data been received yet?
- bool registered; ///< The user has registered
- bool closing_link; ///< Closing link
-
- bool ssl_rx_want_tx; ///< SSL_read() wants to write
- bool ssl_tx_want_rx; ///< SSL_write() wants to read
- SSL *ssl; ///< SSL connection
- char *ssl_cert_fingerprint; ///< Client certificate fingerprint
-
- char *nickname; ///< IRC nickname (main identifier)
- char *username; ///< IRC username
- char *realname; ///< IRC realname (e-mail)
-
- char *hostname; ///< Hostname shown to the network
-
- unsigned mode; ///< User's mode
- char *away_message; ///< Away message
- time_t last_active; ///< Last PRIVMSG, to get idle time
-};
-
-static void
-client_init (struct client *self)
-{
- memset (self, 0, sizeof *self);
-
- self->socket_fd = -1;
- str_init (&self->read_buffer);
- str_init (&self->write_buffer);
-}
-
-static void
-client_free (struct client *self)
-{
- if (!soft_assert (self->socket_fd == -1))
- xclose (self->socket_fd);
- if (self->ssl)
- SSL_free (self->ssl);
-
- str_free (&self->read_buffer);
- str_free (&self->write_buffer);
-
- free (self->nickname);
- free (self->username);
- free (self->realname);
-
- free (self->hostname);
- free (self->away_message);
-}
-
-static void client_close_link (struct client *, const char *);
-static void client_send (struct client *, const char *, ...)
- ATTRIBUTE_PRINTF (2, 3);
-static void client_cancel_timers (struct client *);
-static void client_set_kill_timer (struct client *);
-static void client_update_poller (struct client *, const struct pollfd *);
-
-// --- Channels ----------------------------------------------------------------
-
-#define IRC_SUPPORTED_CHAN_MODES "ov" "beI" "imnqpst" "kl"
-
-enum
-{
- IRC_CHAN_MODE_INVITE_ONLY = (1 << 0),
- IRC_CHAN_MODE_MODERATED = (1 << 1),
- IRC_CHAN_MODE_NO_OUTSIDE_MSGS = (1 << 2),
- IRC_CHAN_MODE_QUIET = (1 << 3),
- IRC_CHAN_MODE_PRIVATE = (1 << 4),
- IRC_CHAN_MODE_SECRET = (1 << 5),
- IRC_CHAN_MODE_PROTECTED_TOPIC = (1 << 6),
-
- IRC_CHAN_MODE_OPERATOR = (1 << 7),
- IRC_CHAN_MODE_VOICE = (1 << 8)
-};
-
-struct channel_user
-{
- LIST_HEADER (channel_user)
-
- unsigned modes;
- struct client *c;
-};
-
-struct channel
-{
- struct server_context *ctx; ///< Server context
-
- char *name; ///< Channel name
- unsigned modes; ///< Channel modes
- char *key; ///< Channel key
- long user_limit; ///< User limit or -1
-
- char *topic; ///< Channel topic
-
- struct channel_user *users; ///< Channel users
-
- struct str_vector ban_list; ///< Ban list
- struct str_vector exception_list; ///< Exceptions from bans
- struct str_vector invite_list; ///< Exceptions from +I
-};
-
-static struct channel *
-channel_new (void)
-{
- struct channel *self = xcalloc (1, sizeof *self);
-
- self->user_limit = -1;
- self->topic = xstrdup ("");
-
- str_vector_init (&self->ban_list);
- str_vector_init (&self->exception_list);
- str_vector_init (&self->invite_list);
- return self;
-}
-
-static void
-channel_delete (struct channel *self)
-{
- free (self->name);
- free (self->key);
- free (self->topic);
-
- struct channel_user *link, *tmp;
- for (link = self->users; link; link = tmp)
- {
- tmp = link->next;
- free (link);
- }
-
- str_vector_free (&self->ban_list);
- str_vector_free (&self->exception_list);
- str_vector_free (&self->invite_list);
-
- free (self);
-}
-
-static char *
-channel_get_mode (struct channel *self, bool disclose_secrets)
-{
- struct str mode;
- str_init (&mode);
-
- unsigned m = self->modes;
- if (m & IRC_CHAN_MODE_INVITE_ONLY) str_append_c (&mode, 'i');
- if (m & IRC_CHAN_MODE_MODERATED) str_append_c (&mode, 'm');
- if (m & IRC_CHAN_MODE_NO_OUTSIDE_MSGS) str_append_c (&mode, 'n');
- if (m & IRC_CHAN_MODE_QUIET) str_append_c (&mode, 'q');
- if (m & IRC_CHAN_MODE_PRIVATE) str_append_c (&mode, 'p');
- if (m & IRC_CHAN_MODE_SECRET) str_append_c (&mode, 's');
- if (m & IRC_CHAN_MODE_PROTECTED_TOPIC) str_append_c (&mode, 't');
-
- if (self->user_limit != -1) str_append_c (&mode, 'l');
- if (self->key) str_append_c (&mode, 'k');
-
- // XXX: is it correct to split it? Try it on an existing implementation.
- if (disclose_secrets)
- {
- if (self->user_limit != -1)
- str_append_printf (&mode, " %ld", self->user_limit);
- if (self->key)
- str_append_printf (&mode, " %s", self->key);
- }
- return str_steal (&mode);
-}
-
-static struct channel_user *
-channel_get_user (const struct channel *chan, const struct client *c)
-{
- for (struct channel_user *iter = chan->users; iter; iter = iter->next)
- if (iter->c == c)
- return iter;
- return NULL;
-}
-
-static struct channel_user *
-channel_add_user (struct channel *chan, struct client *c)
-{
- struct channel_user *link = xcalloc (1, sizeof *link);
- link->c = c;
- LIST_PREPEND (chan->users, link);
- return link;
-}
-
-static void
-channel_remove_user (struct channel *chan, struct channel_user *user)
-{
- LIST_UNLINK (chan->users, user);
- free (user);
-}
-
-static size_t
-channel_user_count (const struct channel *chan)
-{
- size_t result = 0;
- for (struct channel_user *iter = chan->users; iter; iter = iter->next)
- result++;
- return result;
-}
-
-// --- IRC server context ------------------------------------------------------
-
-struct server_context
-{
- int listen_fds[1]; ///< Listening socket FD's
- size_t n_listen_fds; ///< Number of listening sockets
-
- struct client *clients; ///< Clients
- SSL_CTX *ssl_ctx; ///< SSL context
- unsigned n_clients; ///< Current number of connections
-
- struct str_map users; ///< Maps nicknames to clients
- struct str_map channels; ///< Maps channel names to data
- struct str_map handlers; ///< Message handlers
-
- struct poller poller; ///< Manages polled description
- bool quitting; ///< User requested quitting
- bool polling; ///< The event loop is running
-
- struct str_map config; ///< Server configuration
- char *server_name; ///< Our server name
- unsigned ping_interval; ///< Ping interval in seconds
- unsigned max_connections; ///< Max. connections allowed or 0
- struct str_vector motd; ///< MOTD (none if empty)
- nl_catd catalog; ///< Message catalog for server msgs
- struct str_map operators; ///< SSL cert. fingerprints for IRCops
-};
-
-static void
-server_context_init (struct server_context *self)
-{
- self->n_listen_fds = 0;
- self->clients = NULL;
- self->n_clients = 0;
-
- str_map_init (&self->users);
- self->users.key_xfrm = irc_strxfrm;
- str_map_init (&self->channels);
- self->channels.key_xfrm = irc_strxfrm;
- self->channels.free = (void (*) (void *)) channel_delete;
- str_map_init (&self->handlers);
- self->handlers.key_xfrm = irc_strxfrm;
-
- poller_init (&self->poller);
- self->quitting = false;
- self->polling = false;
-
- str_map_init (&self->config);
- self->config.free = free;
- load_config_defaults (&self->config, g_config_table);
-
- self->server_name = NULL;
- self->ping_interval = 0;
- self->max_connections = 0;
- str_vector_init (&self->motd);
- self->catalog = (nl_catd) -1;
- str_map_init (&self->operators);
- // The regular irc_strxfrm() is sufficient for fingerprints
- self->operators.key_xfrm = irc_strxfrm;
-}
-
-static void
-server_context_free (struct server_context *self)
-{
- str_map_free (&self->config);
-
- for (size_t i = 0; i < self->n_listen_fds; i++)
- xclose (self->listen_fds[i]);
- if (self->ssl_ctx)
- SSL_CTX_free (self->ssl_ctx);
-
- struct client *link, *tmp;
- for (link = self->clients; link; link = tmp)
- {
- tmp = link->next;
- client_free (link);
- free (link);
- }
-
- free (self->server_name);
- str_map_free (&self->users);
- str_map_free (&self->channels);
- str_map_free (&self->handlers);
- poller_free (&self->poller);
-
- str_vector_free (&self->motd);
- if (self->catalog != (nl_catd) -1)
- catclose (self->catalog);
- str_map_free (&self->operators);
-}
-
-static const char *
-irc_get_text (struct server_context *ctx, int id, const char *def)
-{
- if (!soft_assert (def != NULL))
- def = "";
- if (ctx->catalog == (nl_catd) -1)
- return def;
- return catgets (ctx->catalog, 1, id, def);
-}
-
-static void
-irc_try_finish_quit (struct server_context *ctx)
-{
- if (!ctx->n_clients && ctx->quitting)
- ctx->polling = false;
-}
-
-static void
-irc_initiate_quit (struct server_context *ctx)
-{
- print_status ("shutting down");
-
- for (struct client *iter = ctx->clients; iter; iter = iter->next)
- if (!iter->closing_link)
- client_close_link (iter, "Shutting down");
-
- for (size_t i = 0; i < ctx->n_listen_fds; i++)
- {
- ssize_t index = poller_find_by_fd (&ctx->poller, ctx->listen_fds[i]);
- if (soft_assert (index != -1))
- poller_remove_at_index (&ctx->poller, index);
- xclose (ctx->listen_fds[i]);
- }
- ctx->n_listen_fds = 0;
-
- ctx->quitting = true;
- irc_try_finish_quit (ctx);
-}
-
-static struct channel *
-irc_channel_create (struct server_context *ctx, const char *name)
-{
- struct channel *chan = channel_new ();
- chan->ctx = ctx;
- chan->name = xstrdup (name);
- str_map_set (&ctx->channels, name, chan);
- return chan;
-}
-
-static void
-irc_channel_destroy_if_empty (struct server_context *ctx, struct channel *chan)
-{
- if (!chan->users)
- str_map_set (&ctx->channels, chan->name, NULL);
-}
-
-static void
-irc_send_to_roommates (struct client *c, const char *message)
-{
- struct str_map targets;
- str_map_init (&targets);
- targets.key_xfrm = irc_strxfrm;
-
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- struct channel *chan;
- while ((chan = str_map_iter_next (&iter)))
- {
- if (chan->modes & IRC_CHAN_MODE_QUIET
- || !channel_get_user (chan, c))
- continue;
-
- // When we're unregistering, the str_map_find() will return zero,
- // which will prevent sending the QUIT message to ourselves.
- for (struct channel_user *iter = chan->users; iter; iter = iter->next)
- str_map_set (&targets, iter->c->nickname,
- str_map_find (&c->ctx->users, iter->c->nickname));
- }
-
- str_map_iter_init (&iter, &targets);
- struct client *target;
- while ((target = str_map_iter_next (&iter)))
- client_send (target, "%s", message);
-}
-
-// --- Clients (continued) -----------------------------------------------------
-
-static void
-client_mode_to_str (unsigned m, struct str *out)
-{
- if (m & IRC_USER_MODE_INVISIBLE) str_append_c (out, 'i');
- if (m & IRC_USER_MODE_RX_WALLOPS) str_append_c (out, 'w');
- if (m & IRC_USER_MODE_RESTRICTED) str_append_c (out, 'r');
- if (m & IRC_USER_MODE_OPERATOR) str_append_c (out, 'o');
- if (m & IRC_USER_MODE_RX_SERVER_NOTICES) str_append_c (out, 's');
-}
-
-static char *
-client_get_mode (struct client *self)
-{
- struct str mode;
- str_init (&mode);
- if (self->away_message)
- str_append_c (&mode, 'a');
- client_mode_to_str (self->mode, &mode);
- return str_steal (&mode);
-}
-
-static void
-client_send_str (struct client *c, const struct str *s)
-{
- hard_assert (c->initialized && !c->closing_link);
-
- // TODO: kill the connection above some "SendQ" threshold (careful!)
- str_append_data (&c->write_buffer, s->str,
- s->len > IRC_MAX_MESSAGE_LENGTH ? IRC_MAX_MESSAGE_LENGTH : s->len);
- str_append (&c->write_buffer, "\r\n");
- // XXX: we might want to move this elsewhere, so that it doesn't get called
- // as often; it's going to cause a lot of syscalls with epoll.
- client_update_poller (c, NULL);
-}
-
-static void
-client_send (struct client *c, const char *format, ...)
-{
- struct str tmp;
- str_init (&tmp);
-
- va_list ap;
- va_start (ap, format);
- str_append_vprintf (&tmp, format, ap);
- va_end (ap);
-
- client_send_str (c, &tmp);
- str_free (&tmp);
-}
-
-static void
-client_unregister (struct client *c, const char *reason)
-{
- if (!c->registered)
- return;
-
- // Make the user effectively non-existent
- str_map_set (&c->ctx->users, c->nickname, NULL);
-
- char *message = xstrdup_printf (":%s!%s@%s QUIT :%s",
- c->nickname, c->username, c->hostname, reason);
- irc_send_to_roommates (c, message);
- free (message);
-
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- struct channel *chan, *next = str_map_iter_next (&iter);
- for (chan = next; chan; chan = next)
- {
- next = str_map_iter_next (&iter);
- struct channel_user *user;
- if (!(user = channel_get_user (chan, c)))
- continue;
- channel_remove_user (chan, user);
- irc_channel_destroy_if_empty (c->ctx, chan);
- }
-
- free (c->nickname);
- c->nickname = NULL;
- c->registered = false;
-}
-
-static void
-client_kill (struct client *c, const char *reason)
-{
- client_unregister (c, reason ? reason : "Client exited");
-
- struct server_context *ctx = c->ctx;
- ssize_t i = poller_find_by_fd (&ctx->poller, c->socket_fd);
- if (i != -1)
- poller_remove_at_index (&ctx->poller, i);
- client_cancel_timers (c);
-
- if (c->ssl)
- (void) SSL_shutdown (c->ssl);
- xclose (c->socket_fd);
- c->socket_fd = -1;
- client_free (c);
- LIST_UNLINK (ctx->clients, c);
- ctx->n_clients--;
- free (c);
-
- irc_try_finish_quit (ctx);
-}
-
-static void
-client_close_link (struct client *c, const char *reason)
-{
- if (!soft_assert (!c->closing_link))
- return;
-
- // We push an `ERROR' message to the write buffer and let the poller send
- // it, with some arbitrary timeout. The `closing_link' state makes sure
- // that a/ we ignore any successive messages, and b/ that the connection
- // is killed after the write buffer is transferred and emptied.
- client_send (c, "ERROR :Closing Link: %s[%s] (%s)", c->nickname,
- c->hostname /* TODO host IP? */, reason);
- c->closing_link = true;
-
- client_unregister (c, reason);
- client_set_kill_timer (c);
-}
-
-static bool
-client_in_mask_list (const struct client *c, const struct str_vector *mask)
-{
- char *client = xstrdup_printf ("%s!%s@%s",
- c->nickname, c->username, c->hostname);
- bool result = false;
- for (size_t i = 0; i < mask->len; i++)
- if (!irc_fnmatch (mask->vector[i], client))
- {
- result = true;
- break;
- }
- free (client);
- return result;
-}
-
-static char *
-client_get_ssl_cert_fingerprint (struct client *c)
-{
- if (!c->ssl)
- return NULL;
-
- X509 *peer_cert = SSL_get_peer_certificate (c->ssl);
- if (!peer_cert)
- return NULL;
-
- int cert_len = i2d_X509 (peer_cert, NULL);
- if (cert_len < 0)
- return NULL;
-
- unsigned char cert[cert_len], *p = cert;
- if (i2d_X509 (peer_cert, &p) < 0)
- return NULL;
-
- unsigned char hash[SHA_DIGEST_LENGTH];
- SHA1 (cert, cert_len, hash);
-
- struct str fingerprint;
- str_init (&fingerprint);
- str_append_printf (&fingerprint, "%02X", hash[0]);
- for (size_t i = 1; i < sizeof hash; i++)
- str_append_printf (&fingerprint, ":%02X", hash[i]);
- return str_steal (&fingerprint);
-}
-
-// --- Timers ------------------------------------------------------------------
-
-static void
-client_cancel_timers (struct client *c)
-{
- ssize_t i;
- struct poller_timers *timers = &c->ctx->poller.timers;
- while ((i = poller_timers_find_by_data (timers, c)) != -1)
- poller_timers_remove_at_index (timers, i);
-}
-
-static void
-client_set_timer (struct client *c, poller_timer_func fn, unsigned interval)
-{
- client_cancel_timers (c);
- poller_timers_add (&c->ctx->poller.timers, fn, c, interval * 1000);
-}
-
-static void
-on_client_kill_timer (void *user_data)
-{
- struct client *c = user_data;
- hard_assert (!c->initialized || c->closing_link);
- client_kill (c, NULL);
-}
-
-static void
-client_set_kill_timer (struct client *c)
-{
- client_set_timer (c, on_client_kill_timer, c->ctx->ping_interval);
-}
-
-static void
-on_client_timeout_timer (void *user_data)
-{
- struct client *c = user_data;
- char *reason = xstrdup_printf
- ("Ping timeout: >%u seconds", c->ctx->ping_interval);
- client_close_link (c, reason);
- free (reason);
-}
-
-static void
-on_client_ping_timer (void *user_data)
-{
- struct client *c = user_data;
- hard_assert (!c->closing_link);
- client_send (c, "PING :%s", c->ctx->server_name);
- client_set_timer (c, on_client_timeout_timer, c->ctx->ping_interval);
-}
-
-static void
-client_set_ping_timer (struct client *c)
-{
- client_set_timer (c, on_client_ping_timer, c->ctx->ping_interval);
-}
-
-// --- IRC command handling ----------------------------------------------------
-
-enum
-{
- IRC_RPL_WELCOME = 1,
- IRC_RPL_YOURHOST = 2,
- IRC_RPL_CREATED = 3,
- IRC_RPL_MYINFO = 4,
-
- IRC_RPL_UMODEIS = 221,
- IRC_RPL_LUSERCLIENT = 251,
- IRC_RPL_LUSEROP = 252,
- IRC_RPL_LUSERUNKNOWN = 253,
- IRC_RPL_LUSERCHANNELS = 254,
- IRC_RPL_LUSERME = 255,
-
- IRC_RPL_AWAY = 301,
- IRC_RPL_USERHOST = 302,
- IRC_RPL_ISON = 303,
- IRC_RPL_UNAWAY = 305,
- IRC_RPL_NOWAWAY = 306,
- IRC_RPL_WHOISUSER = 311,
- IRC_RPL_WHOISSERVER = 312,
- IRC_RPL_WHOISOPERATOR = 313,
- IRC_RPL_ENDOFWHO = 315,
- IRC_RPL_WHOISIDLE = 317,
- IRC_RPL_ENDOFWHOIS = 318,
- IRC_RPL_WHOISCHANNELS = 319,
- IRC_RPL_LIST = 322,
- IRC_RPL_LISTEND = 323,
- IRC_RPL_CHANNELMODEIS = 324,
- IRC_RPL_NOTOPIC = 331,
- IRC_RPL_TOPIC = 332,
- IRC_RPL_INVITELIST = 346,
- IRC_RPL_ENDOFINVITELIST = 347,
- IRC_RPL_EXCEPTLIST = 348,
- IRC_RPL_ENDOFEXCEPTLIST = 349,
- IRC_RPL_VERSION = 351,
- IRC_RPL_WHOREPLY = 352,
- IRC_RPL_NAMREPLY = 353,
- IRC_RPL_ENDOFNAMES = 366,
- IRC_RPL_BANLIST = 367,
- IRC_RPL_ENDOFBANLIST = 368,
- IRC_RPL_MOTD = 372,
- IRC_RPL_MOTDSTART = 375,
- IRC_RPL_ENDOFMOTD = 376,
- IRC_RPL_TIME = 391,
-
- IRC_ERR_NOSUCHNICK = 401,
- IRC_ERR_NOSUCHSERVER = 402,
- IRC_ERR_NOSUCHCHANNEL = 403,
- IRC_ERR_CANNOTSENDTOCHAN = 404,
- IRC_ERR_NOORIGIN = 409,
- IRC_ERR_NORECIPIENT = 411,
- IRC_ERR_NOTEXTTOSEND = 412,
- IRC_ERR_UNKNOWNCOMMAND = 421,
- IRC_ERR_NOMOTD = 422,
- IRC_ERR_NOADMININFO = 423,
- IRC_ERR_NONICKNAMEGIVEN = 431,
- IRC_ERR_ERRONEOUSNICKNAME = 432,
- IRC_ERR_NICKNAMEINUSE = 433,
- IRC_ERR_USERNOTINCHANNEL = 441,
- IRC_ERR_NOTONCHANNEL = 442,
- IRC_ERR_SUMMONDISABLED = 445,
- IRC_ERR_USERSDISABLED = 446,
- IRC_ERR_NOTREGISTERED = 451,
- IRC_ERR_NEEDMOREPARAMS = 461,
- IRC_ERR_ALREADYREGISTERED = 462,
- IRC_ERR_KEYSET = 467,
- IRC_ERR_CHANNELISFULL = 471,
- IRC_ERR_UNKNOWNMODE = 472,
- IRC_ERR_INVITEONLYCHAN = 473,
- IRC_ERR_BANNEDFROMCHAN = 474,
- IRC_ERR_BADCHANNELKEY = 475,
- IRC_ERR_BADCHANMASK = 476,
- IRC_ERR_NOPRIVILEGES = 481,
- IRC_ERR_CHANOPRIVSNEEDED = 482,
-
- IRC_ERR_UMODEUNKNOWNFLAG = 501,
- IRC_ERR_USERSDONTMATCH = 502
-};
-
-static const char *g_default_replies[] =
-{
- [IRC_RPL_WELCOME] = ":Welcome to the Internet Relay Network %s!%s@%s",
- [IRC_RPL_YOURHOST] = ":Your host is %s, running version %s",
- [IRC_RPL_CREATED] = ":This server was created %s",
- [IRC_RPL_MYINFO] = "%s %s %s %s",
-
- [IRC_RPL_UMODEIS] = "+%s",
- [IRC_RPL_LUSERCLIENT] = ":There are %d users and %d services on %d servers",
- [IRC_RPL_LUSEROP] = "%d :operator(s) online",
- [IRC_RPL_LUSERUNKNOWN] = "%d :unknown connection(s)",
- [IRC_RPL_LUSERCHANNELS] = "%d :channels formed",
- [IRC_RPL_LUSERME] = ":I have %d clients and %d servers",
-
- [IRC_RPL_AWAY] = "%s :%s",
- [IRC_RPL_USERHOST] = ":%s",
- [IRC_RPL_ISON] = ":%s",
- [IRC_RPL_UNAWAY] = ":You are no longer marked as being away",
- [IRC_RPL_NOWAWAY] = ":You have been marked as being away",
- [IRC_RPL_WHOISUSER] = "%s %s %s * :%s",
- [IRC_RPL_WHOISSERVER] = "%s %s :%s",
- [IRC_RPL_WHOISOPERATOR] = "%s :is an IRC operator",
- [IRC_RPL_ENDOFWHO] = "%s :End of WHO list",
- [IRC_RPL_WHOISIDLE] = "%s %d :seconds idle",
- [IRC_RPL_ENDOFWHOIS] = "%s :End of WHOIS list",
- [IRC_RPL_WHOISCHANNELS] = "%s :%s",
- [IRC_RPL_LIST] = "%s %d :%s",
- [IRC_RPL_LISTEND] = ":End of LIST",
- [IRC_RPL_CHANNELMODEIS] = "%s +%s",
- [IRC_RPL_NOTOPIC] = "%s :No topic is set",
- [IRC_RPL_TOPIC] = "%s :%s",
- [IRC_RPL_INVITELIST] = "%s %s",
- [IRC_RPL_ENDOFINVITELIST] = "%s :End of channel invite list",
- [IRC_RPL_EXCEPTLIST] = "%s %s",
- [IRC_RPL_ENDOFEXCEPTLIST] = "%s :End of channel exception list",
- [IRC_RPL_VERSION] = "%s.%d %s :%s",
- [IRC_RPL_WHOREPLY] = "%s %s %s %s %s %s :%d %s",
- [IRC_RPL_NAMREPLY] = "%c %s :%s",
- [IRC_RPL_ENDOFNAMES] = "%s :End of NAMES list",
- [IRC_RPL_BANLIST] = "%s %s",
- [IRC_RPL_ENDOFBANLIST] = "%s :End of channel ban list",
- [IRC_RPL_MOTD] = ":- %s",
- [IRC_RPL_MOTDSTART] = ":- %s Message of the day - ",
- [IRC_RPL_ENDOFMOTD] = ":End of MOTD command",
- [IRC_RPL_TIME] = "%s :%s",
-
- [IRC_ERR_NOSUCHNICK] = "%s :No such nick/channel",
- [IRC_ERR_NOSUCHSERVER] = "%s :No such server",
- [IRC_ERR_NOSUCHCHANNEL] = "%s :No such channel",
- [IRC_ERR_CANNOTSENDTOCHAN] = "%s :Cannot send to channel",
- [IRC_ERR_NOORIGIN] = ":No origin specified",
- [IRC_ERR_NORECIPIENT] = ":No recipient given (%s)",
- [IRC_ERR_NOTEXTTOSEND] = ":No text to send",
- [IRC_ERR_UNKNOWNCOMMAND] = "%s: Unknown command",
- [IRC_ERR_NOMOTD] = ":MOTD File is missing",
- [IRC_ERR_NOADMININFO] = "%s :No administrative info available",
- [IRC_ERR_NONICKNAMEGIVEN] = ":No nickname given",
- [IRC_ERR_ERRONEOUSNICKNAME] = "%s :Erroneous nickname",
- [IRC_ERR_NICKNAMEINUSE] = "%s :Nickname is already in use",
- [IRC_ERR_USERNOTINCHANNEL] = "%s %s :They aren't on that channel",
- [IRC_ERR_NOTONCHANNEL] = "%s :You're not on that channel",
- [IRC_ERR_SUMMONDISABLED] = ":SUMMON has been disabled",
- [IRC_ERR_USERSDISABLED] = ":USERS has been disabled",
- [IRC_ERR_NOTREGISTERED] = ":You have not registered",
- [IRC_ERR_NEEDMOREPARAMS] = "%s :Not enough parameters",
- [IRC_ERR_ALREADYREGISTERED] = ":Unauthorized command (already registered)",
- [IRC_ERR_KEYSET] = "%s :Channel key already set",
- [IRC_ERR_CHANNELISFULL] = "%s :Cannot join channel (+l)",
- [IRC_ERR_UNKNOWNMODE] = "%c :is unknown mode char to me for %s",
- [IRC_ERR_INVITEONLYCHAN] = "%s :Cannot join channel (+i)",
- [IRC_ERR_BANNEDFROMCHAN] = "%s :Cannot join channel (+b)",
- [IRC_ERR_BADCHANNELKEY] = "%s :Cannot join channel (+k)",
- [IRC_ERR_BADCHANMASK] = "%s :Bad Channel Mask",
- [IRC_ERR_NOPRIVILEGES] = ":Permission Denied- You're not an IRC operator",
- [IRC_ERR_CHANOPRIVSNEEDED] = "%s :You're not channel operator",
-
- [IRC_ERR_UMODEUNKNOWNFLAG] = ":Unknown MODE flag",
- [IRC_ERR_USERSDONTMATCH] = ":Cannot change mode for other users",
-};
-
-// XXX: this way we cannot typecheck the arguments, so we must be careful
-static void
-irc_send_reply (struct client *c, int id, ...)
-{
- struct str tmp;
- str_init (&tmp);
-
- va_list ap;
- va_start (ap, id);
- str_append_printf (&tmp, ":%s %03d %s ",
- c->ctx->server_name, id, c->nickname ? c->nickname : "");
- str_append_vprintf (&tmp,
- irc_get_text (c->ctx, id, g_default_replies[id]), ap);
- va_end (ap);
-
- client_send_str (c, &tmp);
- str_free (&tmp);
-}
-
-#define RETURN_WITH_REPLY(c, ...) \
- BLOCK_START \
- irc_send_reply ((c), __VA_ARGS__); \
- return; \
- BLOCK_END
-
-static void
-irc_send_motd (struct client *c)
-{
- struct server_context *ctx = c->ctx;
- if (!ctx->motd.len)
- RETURN_WITH_REPLY (c, IRC_ERR_NOMOTD);
-
- irc_send_reply (c, IRC_RPL_MOTDSTART, ctx->server_name);
- for (size_t i = 0; i < ctx->motd.len; i++)
- irc_send_reply (c, IRC_RPL_MOTD, ctx->motd.vector[i]);
- irc_send_reply (c, IRC_RPL_ENDOFMOTD);
-}
-
-static void
-irc_send_lusers (struct client *c)
-{
- int n_users = 0, n_services = 0, n_opers = 0, n_unknown = 0;
- for (struct client *link = c->ctx->clients; link; link = link->next)
- {
- if (link->registered)
- n_users++;
- else
- n_unknown++;
- if (link->mode & IRC_USER_MODE_OPERATOR)
- n_opers++;
- }
-
- int n_channels = 0;
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- struct channel *chan;
- while ((chan = str_map_iter_next (&iter)))
- if (!(chan->modes & IRC_CHAN_MODE_SECRET)
- || channel_get_user (chan, c))
- n_channels++;
-
- irc_send_reply (c, IRC_RPL_LUSERCLIENT,
- n_users, n_services, 1 /* servers total */);
- if (n_opers)
- irc_send_reply (c, IRC_RPL_LUSEROP, n_opers);
- if (n_unknown)
- irc_send_reply (c, IRC_RPL_LUSERUNKNOWN, n_unknown);
- if (n_channels)
- irc_send_reply (c, IRC_RPL_LUSERCHANNELS, n_channels);
- irc_send_reply (c, IRC_RPL_LUSERME,
- n_users + n_services + n_unknown, 0 /* peer servers */);
-}
-
-static bool
-irc_is_this_me (struct server_context *ctx, const char *target)
-{
- // Target servers can also be matched by their users
- return !irc_fnmatch (target, ctx->server_name)
- || str_map_find (&ctx->users, target);
-}
-
-static void
-irc_try_finish_registration (struct client *c)
-{
- struct server_context *ctx = c->ctx;
- if (!c->nickname || !c->username || !c->realname)
- return;
-
- c->registered = true;
- irc_send_reply (c, IRC_RPL_WELCOME, c->nickname, c->username, c->hostname);
-
- irc_send_reply (c, IRC_RPL_YOURHOST, ctx->server_name, PROGRAM_VERSION);
- // The purpose of this message eludes me
- irc_send_reply (c, IRC_RPL_CREATED, __DATE__);
- irc_send_reply (c, IRC_RPL_MYINFO, ctx->server_name, PROGRAM_VERSION,
- IRC_SUPPORTED_USER_MODES, IRC_SUPPORTED_CHAN_MODES);
-
- irc_send_lusers (c);
- irc_send_motd (c);
-
- char *mode = client_get_mode (c);
- if (*mode)
- client_send (c, ":%s MODE %s :+%s", c->nickname, c->nickname, mode);
- free (mode);
-
- hard_assert (c->ssl_cert_fingerprint == NULL);
- if ((c->ssl_cert_fingerprint = client_get_ssl_cert_fingerprint (c)))
- client_send (c, ":%s NOTICE %s :"
- "Your SSL client certificate fingerprint is %s",
- ctx->server_name, c->nickname, c->ssl_cert_fingerprint);
-}
-
-static void
-irc_handle_pass (const struct irc_message *msg, struct client *c)
-{
- if (c->registered)
- irc_send_reply (c, IRC_ERR_ALREADYREGISTERED);
- else if (msg->params.len < 1)
- irc_send_reply (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- // We have SSL client certificates for this purpose; ignoring
-}
-
-static void
-irc_handle_nick (const struct irc_message *msg, struct client *c)
-{
- struct server_context *ctx = c->ctx;
-
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NONICKNAMEGIVEN);
-
- const char *nickname = msg->params.vector[0];
- if (irc_validate_nickname (nickname) != VALIDATION_OK)
- RETURN_WITH_REPLY (c, IRC_ERR_ERRONEOUSNICKNAME, nickname);
-
- struct client *client = str_map_find (&ctx->users, nickname);
- if (client && client != c)
- RETURN_WITH_REPLY (c, IRC_ERR_NICKNAMEINUSE, nickname);
-
- if (c->registered)
- {
- char *message = xstrdup_printf (":%s!%s@%s NICK :%s",
- c->nickname, c->username, c->hostname, nickname);
- irc_send_to_roommates (c, message);
- free (message);
- }
-
- // Release the old nickname and allocate a new one
- if (c->nickname)
- {
- str_map_set (&ctx->users, c->nickname, NULL);
- free (c->nickname);
- }
- c->nickname = xstrdup (nickname);
- str_map_set (&ctx->users, nickname, c);
-
- if (!c->registered)
- irc_try_finish_registration (c);
-}
-
-static void
-irc_handle_user (const struct irc_message *msg, struct client *c)
-{
- if (c->registered)
- RETURN_WITH_REPLY (c, IRC_ERR_ALREADYREGISTERED);
- if (msg->params.len < 4)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- const char *username = msg->params.vector[0];
- const char *mode = msg->params.vector[1];
- const char *realname = msg->params.vector[3];
-
- // Unfortunately the protocol doesn't give us any means of rejecting it
- if (!irc_is_valid_user (username))
- username = "xxx";
-
- free (c->username);
- c->username = xstrdup (username);
- free (c->realname);
- c->realname = xstrdup (realname);
-
- unsigned long m;
- if (xstrtoul (&m, mode, 10))
- {
- if (m & 4) c->mode |= IRC_USER_MODE_RX_WALLOPS;
- if (m & 8) c->mode |= IRC_USER_MODE_INVISIBLE;
- }
-
- irc_try_finish_registration (c);
-}
-
-static void
-irc_handle_userhost (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- struct str reply;
- str_init (&reply);
- for (size_t i = 0; i < 5 && i < msg->params.len; i++)
- {
- const char *nick = msg->params.vector[i];
- struct client *target = str_map_find (&c->ctx->users, nick);
- if (!target)
- continue;
-
- if (i)
- str_append_c (&reply, ' ');
- str_append (&reply, nick);
- if (target->mode & IRC_USER_MODE_OPERATOR)
- str_append_c (&reply, '*');
- str_append_printf (&reply, "=%c%s@%s",
- target->away_message ? '-' : '+',
- target->username, target->hostname);
- }
- irc_send_reply (c, IRC_RPL_USERHOST, reply.str);
- str_free (&reply);
-}
-
-static void
-irc_handle_lusers (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 1 && !irc_is_this_me (c->ctx, msg->params.vector[1]))
- irc_send_reply (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[1]);
- else
- irc_send_lusers (c);
-}
-
-static void
-irc_handle_motd (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 0 && !irc_is_this_me (c->ctx, msg->params.vector[0]))
- irc_send_reply (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[0]);
- else
- irc_send_motd (c);
-}
-
-static void
-irc_handle_ping (const struct irc_message *msg, struct client *c)
-{
- // XXX: the RFC is pretty incomprehensible about the exact usage
- if (msg->params.len > 1 && !irc_is_this_me (c->ctx, msg->params.vector[1]))
- irc_send_reply (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[1]);
- else if (msg->params.len < 1)
- irc_send_reply (c, IRC_ERR_NOORIGIN);
- else
- client_send (c, ":%s PONG :%s",
- c->ctx->server_name, msg->params.vector[0]);
-}
-
-static void
-irc_handle_pong (const struct irc_message *msg, struct client *c)
-{
- // We are the only server, so we don't have to care too much
- if (msg->params.len < 1)
- irc_send_reply (c, IRC_ERR_NOORIGIN);
- else
- // Set a new timer to send another PING
- client_set_ping_timer (c);
-}
-
-static void
-irc_handle_quit (const struct irc_message *msg, struct client *c)
-{
- char *reason = xstrdup_printf ("Quit: %s",
- msg->params.len > 0 ? msg->params.vector[0] : c->nickname);
- client_close_link (c, reason);
- free (reason);
-}
-
-static void
-irc_handle_time (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 0 && !irc_is_this_me (c->ctx, msg->params.vector[0]))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[0]);
-
- char buf[32];
- time_t now = time (NULL);
- struct tm tm;
- strftime (buf, sizeof buf, "%a %b %d %Y %T", localtime_r (&now, &tm));
- irc_send_reply (c, IRC_RPL_TIME, c->ctx->server_name, buf);
-}
-
-static void
-irc_handle_version (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 0 && !irc_is_this_me (c->ctx, msg->params.vector[0]))
- irc_send_reply (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[0]);
- else
- irc_send_reply (c, IRC_RPL_VERSION, PROGRAM_VERSION, g_debug_mode,
- c->ctx->server_name, PROGRAM_NAME " " PROGRAM_VERSION);
-}
-
-static void
-irc_channel_multicast (struct channel *chan, const char *message,
- struct client *except)
-{
- for (struct channel_user *iter = chan->users; iter; iter = iter->next)
- {
- if (iter->c != except)
- client_send (iter->c, "%s", message);
- }
-}
-
-static bool
-irc_modify_mode (unsigned *mask, unsigned mode, bool add)
-{
- unsigned orig = *mask;
- if (add)
- *mask |= mode;
- else
- *mask &= ~mode;
- return *mask != orig;
-}
-
-static void
-irc_update_user_mode (struct client *c, unsigned new_mode)
-{
- unsigned old_mode = c->mode;
- c->mode = new_mode;
-
- unsigned added = new_mode & ~old_mode;
- unsigned removed = old_mode & ~new_mode;
-
- struct str diff;
- str_init (&diff);
-
- if (added)
- {
- str_append_c (&diff, '+');
- client_mode_to_str (added, &diff);
- }
- if (removed)
- {
- str_append_c (&diff, '-');
- client_mode_to_str (removed, &diff);
- }
-
- if (diff.len)
- client_send (c, ":%s MODE %s :%s",
- c->nickname, c->nickname, diff.str);
- str_free (&diff);
-}
-
-static void
-irc_handle_user_mode_change (struct client *c, const char *mode_string)
-{
- unsigned new_mode = c->mode;
- bool adding = true;
-
- while (*mode_string)
- switch (*mode_string++)
- {
- case '+': adding = true; break;
- case '-': adding = false; break;
-
- case 'a':
- // Ignore, the client should use AWAY
- break;
- case 'i':
- irc_modify_mode (&new_mode, IRC_USER_MODE_INVISIBLE, adding);
- break;
- case 'w':
- irc_modify_mode (&new_mode, IRC_USER_MODE_RX_WALLOPS, adding);
- break;
- case 'r':
- // It's not possible to un-restrict yourself
- if (adding)
- new_mode |= IRC_USER_MODE_RESTRICTED;
- break;
- case 'o':
- if (!adding)
- new_mode &= ~IRC_USER_MODE_OPERATOR;
- else if (c->ssl_cert_fingerprint
- && str_map_find (&c->ctx->operators, c->ssl_cert_fingerprint))
- new_mode |= IRC_USER_MODE_OPERATOR;
- else
- client_send (c, ":%s NOTICE %s :Either you're not using an SSL"
- " client certificate, or the fingerprint doesn't match",
- c->ctx->server_name, c->nickname);
- break;
- case 's':
- irc_modify_mode (&new_mode, IRC_USER_MODE_RX_SERVER_NOTICES, adding);
- break;
- default:
- RETURN_WITH_REPLY (c, IRC_ERR_UMODEUNKNOWNFLAG);
- }
- irc_update_user_mode (c, new_mode);
-}
-
-static void
-irc_send_channel_list (struct client *c, const char *channel_name,
- const struct str_vector *list, int reply, int end_reply)
-{
- for (size_t i = 0; i < list->len; i++)
- irc_send_reply (c, reply, channel_name, list->vector[i]);
- irc_send_reply (c, end_reply);
-}
-
-static char *
-irc_check_expand_user_mask (const char *mask)
-{
- struct str result;
- str_init (&result);
- str_append (&result, mask);
-
- // Make sure it is a complete mask
- if (!strchr (result.str, '!'))
- str_append (&result, "!*");
- if (!strchr (result.str, '@'))
- str_append (&result, "@*");
-
- // And validate whatever the result is
- if (!irc_is_valid_user_mask (result.str))
- {
- str_free (&result);
- return NULL;
- }
- return str_steal (&result);
-}
-
-static void
-irc_handle_chan_mode_change (struct client *c,
- struct channel *chan, char *params[])
-{
- struct channel_user *user = channel_get_user (chan, c);
-
- // This is by far the worst command to implement from the whole RFC;
- // don't blame me if it doesn't work exactly as expected.
-
- struct str added; struct str_vector added_params;
- struct str removed; struct str_vector removed_params;
-
- str_init (&added); str_vector_init (&added_params);
- str_init (&removed); str_vector_init (&removed_params);
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
- // TODO: try to convert this madness into functions; that will most
- // likely require creating a special parser class
-#define NEEDS_OPER \
- if (!user || (!(user->modes & IRC_CHAN_MODE_OPERATOR) \
- && !(c->mode & IRC_USER_MODE_OPERATOR))) \
- { \
- irc_send_reply (c, IRC_ERR_CHANOPRIVSNEEDED, chan->name); \
- continue; \
- }
-
-#define HANDLE_USER(mode) \
- if (!(target = *params)) \
- continue; \
- params++; \
- NEEDS_OPER \
- if (!(client = str_map_find (&c->ctx->users, target))) \
- irc_send_reply (c, IRC_ERR_NOSUCHNICK, target); \
- else if (!(target_user = channel_get_user (chan, client))) \
- irc_send_reply (c, IRC_ERR_USERNOTINCHANNEL, \
- target, chan->name); \
- else if (irc_modify_mode (&target_user->modes, (mode), adding)) \
- { \
- str_append_c (output, mode_char); \
- str_vector_add (output_params, client->nickname); \
- }
-
-#define HANDLE_LIST(list, list_msg, end_msg) \
-{ \
- if (!(target = *params)) \
- { \
- if (adding) \
- irc_send_channel_list (c, chan->name, list, list_msg, end_msg); \
- continue; \
- } \
- params++; \
- NEEDS_OPER \
- char *mask = irc_check_expand_user_mask (target); \
- if (!mask) \
- continue; \
- size_t i; \
- for (i = 0; i < (list)->len; i++) \
- if (!irc_strcmp ((list)->vector[i], mask)) \
- break; \
- if (!((i != (list)->len) ^ adding)) \
- { \
- free (mask); \
- continue; \
- } \
- if (adding) \
- str_vector_add ((list), mask); \
- else \
- str_vector_remove ((list), i); \
- str_append_c (output, mode_char); \
- str_vector_add (output_params, mask); \
- free (mask); \
-}
-
-#define HANDLE_MODE(mode) \
- NEEDS_OPER \
- if (irc_modify_mode (&chan->modes, (mode), adding)) \
- str_append_c (output, mode_char);
-
-#define REMOVE_MODE(removed_mode, removed_char) \
- if (adding && irc_modify_mode (&chan->modes, (removed_mode), false)) \
- str_append_c (&removed, (removed_char));
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
- const char *mode_string;
- while ((mode_string = *params++))
- {
- bool adding = true;
- struct str *output = &added;
- struct str_vector *output_params = &added_params;
-
- const char *target;
- struct channel_user *target_user;
- struct client *client;
-
- char mode_char;
- while (*mode_string)
- switch ((mode_char = *mode_string++))
- {
- case '+':
- adding = true;
- output = &added;
- output_params = &added_params;
- break;
- case '-':
- adding = false;
- output = &removed;
- output_params = &removed_params;
- break;
-
- case 'o': HANDLE_USER (IRC_CHAN_MODE_OPERATOR) break;
- case 'v': HANDLE_USER (IRC_CHAN_MODE_VOICE) break;
-
- case 'i': HANDLE_MODE (IRC_CHAN_MODE_INVITE_ONLY) break;
- case 'm': HANDLE_MODE (IRC_CHAN_MODE_MODERATED) break;
- case 'n': HANDLE_MODE (IRC_CHAN_MODE_NO_OUTSIDE_MSGS) break;
- case 'q': HANDLE_MODE (IRC_CHAN_MODE_QUIET) break;
- case 't': HANDLE_MODE (IRC_CHAN_MODE_PROTECTED_TOPIC) break;
-
- case 'p':
- HANDLE_MODE (IRC_CHAN_MODE_PRIVATE)
- REMOVE_MODE (IRC_CHAN_MODE_SECRET, 's')
- break;
- case 's':
- HANDLE_MODE (IRC_CHAN_MODE_SECRET)
- REMOVE_MODE (IRC_CHAN_MODE_PRIVATE, 'p')
- break;
-
- case 'b':
- HANDLE_LIST (&chan->ban_list,
- IRC_RPL_BANLIST, IRC_RPL_ENDOFBANLIST)
- break;
- case 'e':
- HANDLE_LIST (&chan->exception_list,
- IRC_RPL_EXCEPTLIST, IRC_RPL_ENDOFEXCEPTLIST)
- break;
- case 'I':
- HANDLE_LIST (&chan->invite_list,
- IRC_RPL_INVITELIST, IRC_RPL_ENDOFINVITELIST)
- break;
-
- case 'k':
- NEEDS_OPER
- if (!adding)
- {
- if (!(target = *params))
- continue;
- params++;
- if (!chan->key || irc_strcmp (target, chan->key))
- continue;
-
- str_append_c (&removed, mode_char);
- str_vector_add (&removed_params, chan->key);
- free (chan->key);
- chan->key = NULL;
- }
- else if (!(target = *params))
- continue;
- else
- {
- params++;
- if (chan->key)
- irc_send_reply (c, IRC_ERR_KEYSET, chan->name);
- else
- {
- chan->key = xstrdup (target);
- str_append_c (&added, mode_char);
- str_vector_add (&added_params, chan->key);
- }
- }
- break;
- case 'l':
- NEEDS_OPER
- if (!adding)
- {
- if (chan->user_limit == -1)
- continue;
-
- chan->user_limit = -1;
- str_append_c (&removed, mode_char);
- }
- else if (!(target = *params))
- continue;
- else
- {
- params++;
- unsigned long x;
- if (xstrtoul (&x, target, 10) && x > 0 && x <= LONG_MAX)
- {
- chan->user_limit = x;
- str_append_c (&added, mode_char);
- str_vector_add (&added_params, target);
- }
- }
- break;
-
- default:
- RETURN_WITH_REPLY (c, IRC_ERR_UNKNOWNMODE);
- }
- }
-
-#undef NEEDS_OPER
-#undef HANDLE_USER
-#undef HANDLE_LIST
-#undef HANDLE_MODE
-#undef REMOVE_MODE
-
- if (added.len || removed.len)
- {
- struct str message;
- str_init (&message);
- str_append_printf (&message, ":%s!%s@%s MODE %s ",
- c->nickname, c->username, c->hostname, chan->name);
- if (added.len)
- str_append_printf (&message, "+%s", added.str);
- if (removed.len)
- str_append_printf (&message, "-%s", removed.str);
- for (size_t i = 0; i < added_params.len; i++)
- str_append_printf (&message, " %s", added_params.vector[i]);
- for (size_t i = 0; i < removed_params.len; i++)
- str_append_printf (&message, " %s", removed_params.vector[i]);
- irc_channel_multicast (chan, message.str, NULL);
- str_free (&message);
- }
-
- str_free (&added); str_vector_free (&added_params);
- str_free (&removed); str_vector_free (&removed_params);
-}
-
-static void
-irc_handle_mode (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- const char *target = msg->params.vector[0];
- struct client *client = str_map_find (&c->ctx->users, target);
- if (client)
- {
- if (irc_strcmp (target, c->nickname))
- RETURN_WITH_REPLY (c, IRC_ERR_USERSDONTMATCH);
-
- if (msg->params.len < 2)
- {
- char *mode = client_get_mode (client);
- irc_send_reply (c, IRC_RPL_UMODEIS, mode);
- free (mode);
- }
- else
- irc_handle_user_mode_change (c, msg->params.vector[1]);
- return;
- }
-
- struct channel *chan = str_map_find (&c->ctx->channels, target);
- if (chan)
- {
- if (msg->params.len < 2)
- {
- char *mode = channel_get_mode (chan, channel_get_user (chan, c));
- irc_send_reply (c, IRC_RPL_CHANNELMODEIS, target, mode);
- free (mode);
- }
- else
- irc_handle_chan_mode_change (c, chan, &msg->params.vector[1]);
- return;
- }
-
- irc_send_reply (c, IRC_ERR_NOSUCHNICK, target);
-}
-
-static void
-irc_handle_user_message (const struct irc_message *msg, struct client *c,
- const char *command, bool allow_away_reply)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NORECIPIENT, msg->command);
- if (msg->params.len < 2 || !*msg->params.vector[1])
- RETURN_WITH_REPLY (c, IRC_ERR_NOTEXTTOSEND);
-
- const char *target = msg->params.vector[0];
- const char *text = msg->params.vector[1];
- struct client *client = str_map_find (&c->ctx->users, target);
- if (client)
- {
- client_send (client, ":%s!%s@%s %s %s :%s",
- c->nickname, c->username, c->hostname, command, target, text);
- if (allow_away_reply && client->away_message)
- irc_send_reply (c, IRC_RPL_AWAY, target, client->away_message);
- return;
- }
-
- struct channel *chan = str_map_find (&c->ctx->channels, target);
- if (chan)
- {
- struct channel_user *user = channel_get_user (chan, c);
- if ((chan->modes & IRC_CHAN_MODE_NO_OUTSIDE_MSGS) && !user)
- RETURN_WITH_REPLY (c, IRC_ERR_CANNOTSENDTOCHAN, target);
- if ((chan->modes & IRC_CHAN_MODE_MODERATED) && (!user ||
- !(user->modes & (IRC_CHAN_MODE_VOICE | IRC_CHAN_MODE_OPERATOR))))
- RETURN_WITH_REPLY (c, IRC_ERR_CANNOTSENDTOCHAN, target);
- if (client_in_mask_list (c, &chan->ban_list)
- && !client_in_mask_list (c, &chan->exception_list))
- RETURN_WITH_REPLY (c, IRC_ERR_CANNOTSENDTOCHAN, target);
-
- char *message = xstrdup_printf (":%s!%s@%s %s %s :%s",
- c->nickname, c->username, c->hostname, command, target, text);
- irc_channel_multicast (chan, message, c);
- free (message);
- return;
- }
-
- irc_send_reply (c, IRC_ERR_NOSUCHNICK, target);
-}
-
-static void
-irc_handle_privmsg (const struct irc_message *msg, struct client *c)
-{
- irc_handle_user_message (msg, c, "PRIVMSG", true);
- // Let's not care too much about success or failure
- c->last_active = time (NULL);
-}
-
-static void
-irc_handle_notice (const struct irc_message *msg, struct client *c)
-{
- irc_handle_user_message (msg, c, "NOTICE", false);
-}
-
-static void
-irc_send_rpl_list (struct client *c, const struct channel *chan)
-{
- int visible = 0;
- for (struct channel_user *user = chan->users;
- user; user = user->next)
- visible++;
-
- irc_send_reply (c, IRC_RPL_LIST, chan->name, visible, chan->topic);
-}
-
-static void
-irc_handle_list (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 1 && !irc_is_this_me (c->ctx, msg->params.vector[1]))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[1]);
-
- struct channel *chan;
- if (msg->params.len == 0)
- {
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- while ((chan = str_map_iter_next (&iter)))
- if (!(chan->modes & (IRC_CHAN_MODE_PRIVATE | IRC_CHAN_MODE_SECRET))
- || channel_get_user (chan, c))
- irc_send_rpl_list (c, chan);
- }
- else
- {
- struct str_vector channels;
- str_vector_init (&channels);
- split_str_ignore_empty (msg->params.vector[0], ',', &channels);
- for (size_t i = 0; i < channels.len; i++)
- if ((chan = str_map_find (&c->ctx->channels, channels.vector[i]))
- && (!(chan->modes & IRC_CHAN_MODE_SECRET)
- || channel_get_user (chan, c)))
- irc_send_rpl_list (c, chan);
- str_vector_free (&channels);
- }
- irc_send_reply (c, IRC_RPL_LISTEND);
-}
-
-static void
-irc_send_rpl_namreply (struct client *c, const struct channel *chan)
-{
- struct str_vector nicks;
- str_vector_init (&nicks);
-
- char type = '=';
- if (chan->modes & IRC_CHAN_MODE_SECRET)
- type = '@';
- else if (chan->modes & IRC_CHAN_MODE_PRIVATE)
- type = '*';
-
- bool on_channel = channel_get_user (chan, c);
- for (struct channel_user *iter = chan->users; iter; iter = iter->next)
- {
- if (!on_channel && (iter->c->mode & IRC_USER_MODE_INVISIBLE))
- continue;
-
- struct str result;
- str_init (&result);
- if (iter->modes & IRC_CHAN_MODE_OPERATOR)
- str_append_c (&result, '@');
- else if (iter->modes & IRC_CHAN_MODE_VOICE)
- str_append_c (&result, '+');
- str_append (&result, iter->c->nickname);
- str_vector_add_owned (&nicks, str_steal (&result));
- }
-
- if (nicks.len)
- {
- // FIXME: split it into multiple messages if it's too long
- char *reply = join_str_vector (&nicks, ' ');
- irc_send_reply (c, IRC_RPL_NAMREPLY, type, chan->name, reply);
- free (reply);
- }
- str_vector_free (&nicks);
-}
-
-static void
-irc_handle_names (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 1 && !irc_is_this_me (c->ctx, msg->params.vector[1]))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[1]);
-
- struct channel *chan;
- if (msg->params.len == 0)
- {
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- while ((chan = str_map_iter_next (&iter)))
- if (!(chan->modes & (IRC_CHAN_MODE_PRIVATE | IRC_CHAN_MODE_SECRET))
- || channel_get_user (chan, c))
- irc_send_rpl_namreply (c, chan);
-
- // TODO
- // If no <channel> parameter is given, a list of all channels and their
- // occupants is returned. At the end of this list, a list of users who
- // are visible but either not on any channel or not on a visible channel
- // are listed as being on `channel' "*".
- irc_send_reply (c, IRC_RPL_ENDOFNAMES, "*");
- }
- else
- {
- struct str_vector channels;
- str_vector_init (&channels);
- split_str_ignore_empty (msg->params.vector[0], ',', &channels);
- for (size_t i = 0; i < channels.len; i++)
- if ((chan = str_map_find (&c->ctx->channels, channels.vector[i]))
- && (!(chan->modes & IRC_CHAN_MODE_SECRET)
- || channel_get_user (chan, c)))
- {
- irc_send_rpl_namreply (c, chan);
- irc_send_reply (c, IRC_RPL_ENDOFNAMES, channels.vector[i]);
- }
- str_vector_free (&channels);
- }
-}
-
-static void
-irc_send_rpl_whoreply (struct client *c, const struct channel *chan,
- const struct client *target)
-{
- struct str chars;
- str_init (&chars);
-
- str_append_c (&chars, target->away_message ? 'G' : 'H');
- if (target->mode & IRC_USER_MODE_OPERATOR)
- str_append_c (&chars, '*');
-
- struct channel_user *user;
- if (chan && (user = channel_get_user (chan, target)))
- {
- if (user->modes & IRC_CHAN_MODE_OPERATOR)
- str_append_c (&chars, '@');
- else if (user->modes & IRC_CHAN_MODE_VOICE)
- str_append_c (&chars, '+');
- }
-
- irc_send_reply (c, IRC_RPL_WHOREPLY, chan ? chan->name : "*",
- target->username, target->hostname, target->ctx->server_name,
- target->nickname, chars.str, 0 /* hop count */, target->realname);
- str_free (&chars);
-}
-
-static void
-irc_match_send_rpl_whoreply (struct client *c, struct client *target,
- const char *mask)
-{
- bool is_roommate = false;
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- struct channel *chan;
- while ((chan = str_map_iter_next (&iter)))
- if (channel_get_user (chan, target) && channel_get_user (chan, c))
- {
- is_roommate = true;
- break;
- }
- if ((target->mode & IRC_USER_MODE_INVISIBLE) && !is_roommate)
- return;
-
- if (irc_fnmatch (mask, target->hostname)
- && irc_fnmatch (mask, target->nickname)
- && irc_fnmatch (mask, target->realname)
- && irc_fnmatch (mask, c->ctx->server_name))
- return;
-
- // Try to find a channel they're on that's visible to us
- struct channel *user_chan = NULL;
- str_map_iter_init (&iter, &c->ctx->channels);
- while ((chan = str_map_iter_next (&iter)))
- if (channel_get_user (chan, target)
- && (!(chan->modes & (IRC_CHAN_MODE_PRIVATE | IRC_CHAN_MODE_SECRET))
- || channel_get_user (chan, c)))
- {
- user_chan = chan;
- break;
- }
- irc_send_rpl_whoreply (c, user_chan, target);
-}
-
-static void
-irc_handle_who (const struct irc_message *msg, struct client *c)
-{
- bool only_ops = msg->params.len > 1 && !strcmp (msg->params.vector[1], "o");
-
- const char *shown_mask = msg->params.vector[0], *used_mask;
- if (!shown_mask)
- used_mask = shown_mask = "*";
- else if (!strcmp (shown_mask, "0"))
- used_mask = "*";
- else
- used_mask = shown_mask;
-
- struct channel *chan;
- if ((chan = str_map_find (&c->ctx->channels, used_mask)))
- {
- bool on_chan = !!channel_get_user (chan, c);
- if (on_chan || !(chan->modes & IRC_CHAN_MODE_SECRET))
- for (struct channel_user *iter = chan->users;
- iter; iter = iter->next)
- {
- if ((on_chan || !(iter->c->mode & IRC_USER_MODE_INVISIBLE))
- && (!only_ops || (iter->c->mode & IRC_USER_MODE_OPERATOR)))
- irc_send_rpl_whoreply (c, chan, iter->c);
- }
- }
- else
- {
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->users);
- struct client *target;
- while ((target = str_map_iter_next (&iter)))
- if (!only_ops || (target->mode & IRC_USER_MODE_OPERATOR))
- irc_match_send_rpl_whoreply (c, target, used_mask);
- }
- irc_send_reply (c, IRC_RPL_ENDOFWHO, shown_mask);
-}
-
-static void
-irc_send_whois_reply (struct client *c, const struct client *target)
-{
- const char *nick = target->nickname;
- irc_send_reply (c, IRC_RPL_WHOISUSER, nick, target->username,
- target->hostname, target->realname);
- irc_send_reply (c, IRC_RPL_WHOISSERVER, nick, target->ctx->server_name,
- str_map_find (&c->ctx->config, "server_info"));
- if (target->mode & IRC_USER_MODE_OPERATOR)
- irc_send_reply (c, IRC_RPL_WHOISOPERATOR, nick);
- irc_send_reply (c, IRC_RPL_WHOISIDLE, nick,
- (int) (time (NULL) - target->last_active));
-
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- struct channel *chan;
- struct channel_user *channel_user;
- while ((chan = str_map_iter_next (&iter)))
- if ((channel_user = channel_get_user (chan, target))
- && (!(chan->modes & (IRC_CHAN_MODE_PRIVATE | IRC_CHAN_MODE_SECRET))
- || channel_get_user (chan, c)))
- {
- struct str item;
- str_init (&item);
- if (channel_user->modes & IRC_CHAN_MODE_OPERATOR)
- str_append_c (&item, '@');
- else if (channel_user->modes & IRC_CHAN_MODE_VOICE)
- str_append_c (&item, '+');
- str_append (&item, chan->name);
- str_append_c (&item, ' ');
-
- // TODO: try to merge the results into as few messages as possible
- irc_send_reply (c, IRC_RPL_WHOISCHANNELS, nick, item.str);
-
- str_free (&item);
- }
-
- irc_send_reply (c, IRC_RPL_ENDOFWHOIS, nick);
-}
-
-static void
-irc_handle_whois (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
- if (msg->params.len > 1 && !irc_is_this_me (c->ctx, msg->params.vector[0]))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[0]);
-
- struct str_vector masks;
- str_vector_init (&masks);
- const char *masks_str = msg->params.vector[msg->params.len > 1];
- split_str_ignore_empty (masks_str, ',', &masks);
- for (size_t i = 0; i < masks.len; i++)
- {
- const char *mask = masks.vector[i];
- struct client *target;
- if (!strpbrk (mask, "*?"))
- {
- if (!(target = str_map_find (&c->ctx->users, mask)))
- irc_send_reply (c, IRC_ERR_NOSUCHNICK, mask);
- else
- irc_send_whois_reply (c, target);
- }
- else
- {
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->users);
- bool found = false;
- while ((target = str_map_iter_next (&iter))
- && !irc_fnmatch (mask, target->nickname))
- {
- irc_send_whois_reply (c, target);
- found = true;
- }
- if (!found)
- irc_send_reply (c, IRC_ERR_NOSUCHNICK, mask);
- }
- }
- str_vector_free (&masks);
-}
-
-static void
-irc_send_rpl_topic (struct client *c, struct channel *chan)
-{
- if (!*chan->topic)
- irc_send_reply (c, IRC_RPL_NOTOPIC, chan->name);
- else
- irc_send_reply (c, IRC_RPL_TOPIC, chan->name, chan->topic);
-}
-
-static void
-irc_handle_topic (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- const char *target = msg->params.vector[0];
- struct channel *chan = str_map_find (&c->ctx->channels, target);
- if (!chan)
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHCHANNEL, target);
-
- if (msg->params.len < 2)
- {
- irc_send_rpl_topic (c, chan);
- return;
- }
-
- struct channel_user *user = channel_get_user (chan, c);
- if (!user)
- RETURN_WITH_REPLY (c, IRC_ERR_NOTONCHANNEL, target);
-
- if ((chan->modes & IRC_CHAN_MODE_PROTECTED_TOPIC)
- && !(user->modes & IRC_CHAN_MODE_OPERATOR))
- RETURN_WITH_REPLY (c, IRC_ERR_CHANOPRIVSNEEDED, target);
-
- free (chan->topic);
- chan->topic = xstrdup (msg->params.vector[1]);
-
- char *message = xstrdup_printf (":%s!%s@%s TOPIC %s :%s",
- c->nickname, c->username, c->hostname, target, chan->topic);
- irc_channel_multicast (chan, message, NULL);
- free (message);
-}
-
-static void
-irc_try_part (struct client *c, const char *channel_name, const char *reason)
-{
- if (!reason)
- reason = c->nickname;
-
- struct channel *chan;
- if (!(chan = str_map_find (&c->ctx->channels, channel_name)))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHCHANNEL, channel_name);
-
- struct channel_user *user;
- if (!(user = channel_get_user (chan, c)))
- RETURN_WITH_REPLY (c, IRC_ERR_NOTONCHANNEL, channel_name);
-
- char *message = xstrdup_printf (":%s!%s@%s PART %s :%s",
- c->nickname, c->username, c->hostname, channel_name, reason);
- if (!(chan->modes & IRC_CHAN_MODE_QUIET))
- irc_channel_multicast (chan, message, NULL);
- else
- client_send (c, "%s", message);
- free (message);
-
- channel_remove_user (chan, user);
- irc_channel_destroy_if_empty (c->ctx, chan);
-}
-
-static void
-irc_part_all_channels (struct client *c)
-{
- struct str_map_iter iter;
- str_map_iter_init (&iter, &c->ctx->channels);
- struct channel *chan = str_map_iter_next (&iter), *next;
- while (chan)
- {
- // We have to be careful here, the channel might get destroyed
- next = str_map_iter_next (&iter);
- if (channel_get_user (chan, c))
- irc_try_part (c, chan->name, NULL);
- chan = next;
- }
-}
-
-static void
-irc_handle_part (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- const char *reason = msg->params.len > 1 ? msg->params.vector[1] : NULL;
- struct str_vector channels;
- str_vector_init (&channels);
- split_str_ignore_empty (msg->params.vector[0], ',', &channels);
- for (size_t i = 0; i < channels.len; i++)
- irc_try_part (c, channels.vector[i], reason);
- str_vector_free (&channels);
-}
-
-static void
-irc_try_kick (struct client *c, const char *channel_name, const char *nick,
- const char *reason)
-{
- struct channel *chan;
- if (!(chan = str_map_find (&c->ctx->channels, channel_name)))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHCHANNEL, channel_name);
-
- struct channel_user *user;
- if (!(user = channel_get_user (chan, c)))
- RETURN_WITH_REPLY (c, IRC_ERR_NOTONCHANNEL, channel_name);
- if (!(user->modes & IRC_CHAN_MODE_OPERATOR))
- RETURN_WITH_REPLY (c, IRC_ERR_CHANOPRIVSNEEDED, channel_name);
-
- struct client *client;
- if (!(client = str_map_find (&c->ctx->users, nick))
- || !(user = channel_get_user (chan, client)))
- RETURN_WITH_REPLY (c, IRC_ERR_USERNOTINCHANNEL, nick, channel_name);
-
- char *message = xstrdup_printf (":%s!%s@%s KICK %s %s :%s",
- c->nickname, c->username, c->hostname, channel_name, nick, reason);
- if (!(chan->modes & IRC_CHAN_MODE_QUIET))
- irc_channel_multicast (chan, message, NULL);
- else
- client_send (c, "%s", message);
- free (message);
-
- channel_remove_user (chan, user);
- irc_channel_destroy_if_empty (c->ctx, chan);
-}
-
-static void
-irc_handle_kick (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 2)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- const char *reason = c->nickname;
- if (msg->params.len > 2)
- reason = msg->params.vector[2];
-
- struct str_vector channels;
- struct str_vector users;
- str_vector_init (&channels);
- str_vector_init (&users);
- split_str_ignore_empty (msg->params.vector[0], ',', &channels);
- split_str_ignore_empty (msg->params.vector[1], ',', &users);
-
- if (channels.len == 1)
- for (size_t i = 0; i < users.len; i++)
- irc_try_kick (c, channels.vector[0], users.vector[i], reason);
- else
- for (size_t i = 0; i < channels.len && i < users.len; i++)
- irc_try_kick (c, channels.vector[i], users.vector[i], reason);
-
- str_vector_free (&channels);
- str_vector_free (&users);
-}
-
-static void
-irc_try_join (struct client *c, const char *channel_name, const char *key)
-{
- struct channel *chan = str_map_find (&c->ctx->channels, channel_name);
- unsigned user_mode = 0;
- if (!chan)
- {
- if (irc_validate_channel_name (channel_name) != VALIDATION_OK)
- RETURN_WITH_REPLY (c, IRC_ERR_BADCHANMASK, channel_name);
- chan = irc_channel_create (c->ctx, channel_name);
- user_mode = IRC_CHAN_MODE_OPERATOR;
- }
- else if (channel_get_user (chan, c))
- return;
-
- if ((chan->modes & IRC_CHAN_MODE_INVITE_ONLY)
- && !client_in_mask_list (c, &chan->invite_list))
- // TODO: exceptions caused by INVITE
- RETURN_WITH_REPLY (c, IRC_ERR_INVITEONLYCHAN, channel_name);
- if (chan->key && (!key || strcmp (key, chan->key)))
- RETURN_WITH_REPLY (c, IRC_ERR_BADCHANNELKEY, channel_name);
- if (chan->user_limit != -1
- && channel_user_count (chan) >= (size_t) chan->user_limit)
- RETURN_WITH_REPLY (c, IRC_ERR_CHANNELISFULL, channel_name);
- if (client_in_mask_list (c, &chan->ban_list)
- && !client_in_mask_list (c, &chan->exception_list))
- RETURN_WITH_REPLY (c, IRC_ERR_BANNEDFROMCHAN, channel_name);
-
- channel_add_user (chan, c)->modes = user_mode;
-
- char *message = xstrdup_printf (":%s!%s@%s JOIN %s",
- c->nickname, c->username, c->hostname, channel_name);
- if (!(chan->modes & IRC_CHAN_MODE_QUIET))
- irc_channel_multicast (chan, message, NULL);
- else
- client_send (c, "%s", message);
- free (message);
-
- irc_send_rpl_topic (c, chan);
- irc_send_rpl_namreply (c, chan);
- irc_send_reply (c, IRC_RPL_ENDOFNAMES, chan->name);
-}
-
-static void
-irc_handle_join (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- if (!strcmp (msg->params.vector[0], "0"))
- {
- irc_part_all_channels (c);
- return;
- }
-
- struct str_vector channels;
- struct str_vector keys;
- str_vector_init (&channels);
- str_vector_init (&keys);
- split_str_ignore_empty (msg->params.vector[0], ',', &channels);
- if (msg->params.len > 1)
- split_str_ignore_empty (msg->params.vector[1], ',', &keys);
-
- for (size_t i = 0; i < channels.len; i++)
- irc_try_join (c, channels.vector[i],
- i < keys.len ? keys.vector[i] : NULL);
-
- str_vector_free (&channels);
- str_vector_free (&keys);
-}
-
-static void
-irc_handle_summon (const struct irc_message *msg, struct client *c)
-{
- (void) msg;
- irc_send_reply (c, IRC_ERR_SUMMONDISABLED);
-}
-
-static void
-irc_handle_users (const struct irc_message *msg, struct client *c)
-{
- (void) msg;
- irc_send_reply (c, IRC_ERR_USERSDISABLED);
-}
-
-static void
-irc_handle_away (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- {
- free (c->away_message);
- c->away_message = NULL;
- irc_send_reply (c, IRC_RPL_UNAWAY);
- }
- else
- {
- free (c->away_message);
- c->away_message = xstrdup (msg->params.vector[0]);
- irc_send_reply (c, IRC_RPL_NOWAWAY);
- }
-}
-
-static void
-irc_handle_ison (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 1)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
-
- struct str result;
- str_init (&result);
-
- const char *nick;
- if (str_map_find (&c->ctx->users, (nick = msg->params.vector[0])))
- str_append (&result, nick);
- for (size_t i = 1; i < msg->params.len; i++)
- if (str_map_find (&c->ctx->users, (nick = msg->params.vector[i])))
- str_append_printf (&result, " %s", nick);
-
- irc_send_reply (c, IRC_RPL_ISON, result.str);
- str_free (&result);
-}
-
-static void
-irc_handle_admin (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len > 0 && !irc_is_this_me (c->ctx, msg->params.vector[0]))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHSERVER, msg->params.vector[0]);
- irc_send_reply (c, IRC_ERR_NOADMININFO, c->ctx->server_name);
-}
-
-static void
-irc_handle_kill (const struct irc_message *msg, struct client *c)
-{
- if (msg->params.len < 2)
- RETURN_WITH_REPLY (c, IRC_ERR_NEEDMOREPARAMS, msg->command);
- if (!(c->mode & IRC_USER_MODE_OPERATOR))
- RETURN_WITH_REPLY (c, IRC_ERR_NOPRIVILEGES);
-
- struct client *target;
- if (!(target = str_map_find (&c->ctx->users, msg->params.vector[0])))
- RETURN_WITH_REPLY (c, IRC_ERR_NOSUCHNICK, msg->params.vector[0]);
- char *reason = xstrdup_printf ("Killed by %s: %s",
- c->nickname, msg->params.vector[1]);
- client_close_link (target, reason);
- free (reason);
-}
-
-static void
-irc_handle_die (const struct irc_message *msg, struct client *c)
-{
- (void) msg;
-
- if (!(c->mode & IRC_USER_MODE_OPERATOR))
- RETURN_WITH_REPLY (c, IRC_ERR_NOPRIVILEGES);
- if (!c->ctx->quitting)
- irc_initiate_quit (c->ctx);
-}
-
-// -----------------------------------------------------------------------------
-
-struct irc_command
-{
- const char *name;
- bool requires_registration;
- void (*handler) (const struct irc_message *, struct client *);
-};
-
-static void
-irc_register_handlers (struct server_context *ctx)
-{
- // TODO: add an index for IRC_ERR_NOSUCHSERVER validation?
- // TODO: add a minimal parameter count?
- // TODO: add a field for oper-only commands?
- static const struct irc_command message_handlers[] =
- {
- { "PASS", false, irc_handle_pass },
- { "NICK", false, irc_handle_nick },
- { "USER", false, irc_handle_user },
-
- { "USERHOST", true, irc_handle_userhost },
- { "LUSERS", true, irc_handle_lusers },
- { "MOTD", true, irc_handle_motd },
- { "PING", true, irc_handle_ping },
- { "PONG", false, irc_handle_pong },
- { "QUIT", false, irc_handle_quit },
- { "TIME", true, irc_handle_time },
- { "VERSION", true, irc_handle_version },
- { "USERS", true, irc_handle_users },
- { "SUMMON", true, irc_handle_summon },
- { "AWAY", true, irc_handle_away },
- { "ADMIN", true, irc_handle_admin },
-
- { "MODE", true, irc_handle_mode },
- { "PRIVMSG", true, irc_handle_privmsg },
- { "NOTICE", true, irc_handle_notice },
- { "JOIN", true, irc_handle_join },
- { "PART", true, irc_handle_part },
- { "KICK", true, irc_handle_kick },
- { "TOPIC", true, irc_handle_topic },
- { "LIST", true, irc_handle_list },
- { "NAMES", true, irc_handle_names },
- { "WHO", true, irc_handle_who },
- { "WHOIS", true, irc_handle_whois },
- { "ISON", true, irc_handle_ison },
-
- { "KILL", true, irc_handle_kill },
- { "DIE", true, irc_handle_die },
- };
-
- for (size_t i = 0; i < N_ELEMENTS (message_handlers); i++)
- {
- const struct irc_command *cmd = &message_handlers[i];
- str_map_set (&ctx->handlers, cmd->name, (void *) cmd);
- }
-}
-
-static void
-irc_process_message (const struct irc_message *msg,
- const char *raw, void *user_data)
-{
- (void) raw;
-
- struct client *c = user_data;
- if (c->closing_link)
- return;
-
- struct irc_command *cmd = str_map_find (&c->ctx->handlers, msg->command);
- if (!cmd)
- irc_send_reply (c, IRC_ERR_UNKNOWNCOMMAND, msg->command);
- else if (cmd->requires_registration && !c->registered)
- irc_send_reply (c, IRC_ERR_NOTREGISTERED);
- else
- cmd->handler (msg, c);
-}
-
-// --- Network I/O -------------------------------------------------------------
-
-static bool
-irc_try_read (struct client *c)
-{
- struct str *buf = &c->read_buffer;
- ssize_t n_read;
-
- while (true)
- {
- str_ensure_space (buf, 512);
- n_read = recv (c->socket_fd, buf->str + buf->len,
- buf->alloc - buf->len - 1 /* null byte */, 0);
-
- if (n_read > 0)
- {
- buf->str[buf->len += n_read] = '\0';
- // TODO: discard characters above the 512 character limit
- irc_process_buffer (buf, irc_process_message, c);
- continue;
- }
- if (n_read == 0)
- {
- client_kill (c, NULL);
- return false;
- }
-
- if (errno == EAGAIN)
- return true;
- if (errno == EINTR)
- continue;
-
- print_debug ("%s: %s: %s", __func__, "recv", strerror (errno));
- client_kill (c, strerror (errno));
- return false;
- }
-}
-
-static bool
-irc_try_read_ssl (struct client *c)
-{
- if (c->ssl_tx_want_rx)
- return true;
-
- struct str *buf = &c->read_buffer;
- c->ssl_rx_want_tx = false;
- while (true)
- {
- str_ensure_space (buf, 512);
- int n_read = SSL_read (c->ssl, buf->str + buf->len,
- buf->alloc - buf->len - 1 /* null byte */);
-
- const char *error_info = NULL;
- switch (xssl_get_error (c->ssl, n_read, &error_info))
- {
- case SSL_ERROR_NONE:
- buf->str[buf->len += n_read] = '\0';
- // TODO: discard characters above the 512 character limit
- irc_process_buffer (buf, irc_process_message, c);
- continue;
- case SSL_ERROR_ZERO_RETURN:
- client_kill (c, NULL);
- return false;
- case SSL_ERROR_WANT_READ:
- return true;
- case SSL_ERROR_WANT_WRITE:
- c->ssl_rx_want_tx = true;
- return true;
- case XSSL_ERROR_TRY_AGAIN:
- continue;
- default:
- print_debug ("%s: %s: %s", __func__, "SSL_read", error_info);
- client_kill (c, error_info);
- return false;
- }
- }
-}
-
-static bool
-irc_try_write (struct client *c)
-{
- struct str *buf = &c->write_buffer;
- ssize_t n_written;
-
- while (buf->len)
- {
- n_written = send (c->socket_fd, buf->str, buf->len, 0);
- if (n_written >= 0)
- {
- str_remove_slice (buf, 0, n_written);
- continue;
- }
-
- if (errno == EAGAIN)
- return true;
- if (errno == EINTR)
- continue;
-
- print_debug ("%s: %s: %s", __func__, "send", strerror (errno));
- client_kill (c, strerror (errno));
- return false;
- }
- return true;
-}
-
-static bool
-irc_try_write_ssl (struct client *c)
-{
- if (c->ssl_rx_want_tx)
- return true;
-
- struct str *buf = &c->write_buffer;
- c->ssl_tx_want_rx = false;
- while (buf->len)
- {
- int n_written = SSL_write (c->ssl, buf->str, buf->len);
-
- const char *error_info = NULL;
- switch (xssl_get_error (c->ssl, n_written, &error_info))
- {
- case SSL_ERROR_NONE:
- str_remove_slice (buf, 0, n_written);
- continue;
- case SSL_ERROR_ZERO_RETURN:
- client_kill (c, NULL);
- return false;
- case SSL_ERROR_WANT_WRITE:
- return true;
- case SSL_ERROR_WANT_READ:
- c->ssl_tx_want_rx = true;
- return true;
- case XSSL_ERROR_TRY_AGAIN:
- continue;
- default:
- print_debug ("%s: %s: %s", __func__, "SSL_write", error_info);
- client_kill (c, error_info);
- return false;
- }
- }
- return true;
-}
-
-static bool
-irc_autodetect_ssl (struct client *c)
-{
- // Trivial SSL/TLS autodetection. The first block of data returned by
- // recv() must be at least three bytes long for this to work reliably,
- // but that should not pose a problem in practice.
- //
- // SSL2: 1xxx xxxx | xxxx xxxx | <1>
- // (message length) (client hello)
- // SSL3/TLS: <22> | <3> | xxxx xxxx
- // (handshake)| (protocol version)
- //
- // Such byte sequences should never occur at the beginning of regular IRC
- // communication, which usually begins with USER/NICK/PASS/SERVICE.
-
- char buf[3];
-start:
- switch (recv (c->socket_fd, buf, sizeof buf, MSG_PEEK))
- {
- case 3:
- if ((buf[0] & 0x80) && buf[2] == 1)
- return true;
- case 2:
- if (buf[0] == 22 && buf[1] == 3)
- return true;
- break;
- case 1:
- if (buf[0] == 22)
- return true;
- break;
- case 0:
- break;
- default:
- if (errno == EINTR)
- goto start;
- }
- return false;
-}
-
-static bool
-client_initialize_ssl (struct client *c)
-{
- // SSL support not enabled
- if (!c->ctx->ssl_ctx)
- return false;
-
- c->ssl = SSL_new (c->ctx->ssl_ctx);
- if (!c->ssl)
- goto error_ssl_1;
-
- if (!SSL_set_fd (c->ssl, c->socket_fd))
- goto error_ssl_2;
- SSL_set_accept_state (c->ssl);
- return true;
-
-error_ssl_2:
- SSL_free (c->ssl);
- c->ssl = NULL;
-error_ssl_1:
- // XXX: these error strings are really nasty; also there could be
- // multiple errors on the OpenSSL stack.
- print_debug ("%s: %s: %s", "could not initialize SSL",
- c->hostname, ERR_error_string (ERR_get_error (), NULL));
- return false;
-}
-
-static void
-on_client_ready (const struct pollfd *pfd, void *user_data)
-{
- struct client *c = user_data;
- if (!c->initialized)
- {
- hard_assert (pfd->events == POLLIN);
- if (irc_autodetect_ssl (c) && !client_initialize_ssl (c))
- {
- client_kill (c, NULL);
- return;
- }
- c->initialized = true;
- client_set_ping_timer (c);
- }
-
- if (c->ssl)
- {
- // Reads may want to write, writes may want to read, poll() may
- // return unexpected things in `revents'... let's try both
- if (!irc_try_read_ssl (c) || !irc_try_write_ssl (c))
- return;
- }
- else if (!irc_try_read (c) || !irc_try_write (c))
- return;
-
- client_update_poller (c, pfd);
-
- // The purpose of the `closing_link' state is to transfer the `ERROR'
- if (c->closing_link && !c->write_buffer.len)
- client_kill (c, NULL);
-}
-
-static void
-client_update_poller (struct client *c, const struct pollfd *pfd)
-{
- int new_events = POLLIN;
- if (c->ssl)
- {
- if (c->write_buffer.len || c->ssl_rx_want_tx)
- new_events |= POLLOUT;
-
- // While we're waiting for an opposite event, we ignore the original
- if (c->ssl_rx_want_tx) new_events &= ~POLLIN;
- if (c->ssl_tx_want_rx) new_events &= ~POLLOUT;
- }
- else if (c->write_buffer.len)
- new_events |= POLLOUT;
-
- hard_assert (new_events != 0);
- if (!pfd || pfd->events != new_events)
- poller_set (&c->ctx->poller, c->socket_fd, new_events,
- (poller_dispatcher_func) on_client_ready, c);
-}
-
-static void
-on_irc_client_available (const struct pollfd *pfd, void *user_data)
-{
- (void) pfd;
- struct server_context *ctx = user_data;
-
- while (true)
- {
- // XXX: `struct sockaddr_storage' is not the most portable thing
- struct sockaddr_storage peer;
- socklen_t peer_len = sizeof peer;
-
- int fd = accept (pfd->fd, (struct sockaddr *) &peer, &peer_len);
- if (fd == -1)
- {
- if (errno == EAGAIN)
- break;
- if (errno == EINTR
- || errno == ECONNABORTED)
- continue;
-
- // TODO: handle resource exhaustion (EMFILE, ENFILE) specially
- // (stop accepting new connections and wait until we close some).
- // FIXME: handle this better, bring the server down cleanly.
- exit_fatal ("%s: %s", "accept", strerror (errno));
- }
-
- if (ctx->max_connections != 0 && ctx->n_clients >= ctx->max_connections)
- {
- print_debug ("connection limit reached, refusing connection");
- close (fd);
- continue;
- }
-
- char host[NI_MAXHOST] = "unknown", port[NI_MAXSERV] = "unknown";
- int err = getnameinfo ((struct sockaddr *) &peer, peer_len,
- host, sizeof host, port, sizeof port, NI_NUMERICSERV);
- if (err)
- print_debug ("%s: %s", "getnameinfo", gai_strerror (err));
- print_debug ("accepted connection from %s:%s", host, port);
-
- struct client *c = xmalloc (sizeof *c);
- client_init (c);
- c->ctx = ctx;
- c->socket_fd = fd;
- c->hostname = xstrdup (host);
- c->last_active = time (NULL);
- LIST_PREPEND (ctx->clients, c);
- ctx->n_clients++;
-
- set_blocking (fd, false);
- client_update_poller (c, NULL);
- client_set_kill_timer (c);
- }
-}
-
-// --- Application setup -------------------------------------------------------
-
-static int
-irc_ssl_verify_callback (int verify_ok, X509_STORE_CTX *ctx)
-{
- (void) verify_ok;
- (void) ctx;
-
- // We only want to provide additional privileges based on the client's
- // certificate, so let's not terminate the connection because of a failure.
- return 1;
-}
-
-static bool
-irc_initialize_ssl (struct server_context *ctx, struct error **e)
-{
- const char *ssl_cert = str_map_find (&ctx->config, "ssl_cert");
- const char *ssl_key = str_map_find (&ctx->config, "ssl_key");
-
- // Only try to enable SSL support if the user configures it; it is not
- // a failure if no one has requested it.
- if (!ssl_cert && !ssl_key)
- return true;
-
- if (!ssl_cert)
- error_set (e, "no SSL certificate set");
- else if (!ssl_key)
- error_set (e, "no SSL private key set");
- if (!ssl_cert || !ssl_key)
- return false;
-
- char *cert_path = resolve_config_filename (ssl_cert);
- char *key_path = resolve_config_filename (ssl_key);
- if (!cert_path)
- error_set (e, "%s: %s", "cannot open file", ssl_cert);
- else if (!key_path)
- error_set (e, "%s: %s", "cannot open file", ssl_key);
- if (!cert_path || !key_path)
- return false;
-
- ctx->ssl_ctx = SSL_CTX_new (SSLv23_server_method ());
- if (!ctx->ssl_ctx)
- {
- // XXX: these error strings are really nasty; also there could be
- // multiple errors on the OpenSSL stack.
- error_set (e, "%s: %s", "could not initialize SSL",
- ERR_error_string (ERR_get_error (), NULL));
- goto error_ssl_1;
- }
- SSL_CTX_set_verify (ctx->ssl_ctx,
- SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, irc_ssl_verify_callback);
- // XXX: maybe we should call SSL_CTX_set_options() for some workarounds
-
- const unsigned char session_id_context[SSL_MAX_SSL_SESSION_ID_LENGTH]
- = PROGRAM_NAME;
- (void) SSL_CTX_set_session_id_context (ctx->ssl_ctx,
- session_id_context, sizeof session_id_context);
-
- // XXX: perhaps we should read the files ourselves for better messages
- if (!SSL_CTX_use_certificate_chain_file (ctx->ssl_ctx, cert_path))
- {
- error_set (e, "%s: %s", "setting the SSL client certificate failed",
- ERR_error_string (ERR_get_error (), NULL));
- goto error_ssl_2;
- }
- if (!SSL_CTX_use_PrivateKey_file (ctx->ssl_ctx, key_path, SSL_FILETYPE_PEM))
- {
- error_set (e, "%s: %s", "setting the SSL private key failed",
- ERR_error_string (ERR_get_error (), NULL));
- goto error_ssl_2;
- }
-
- // TODO: SSL_CTX_check_private_key()? It has probably already been checked
- // by SSL_CTX_use_PrivateKey_file() above.
-
- // Gah, spare me your awkward semantics, I just want to push data!
- // XXX: do we want SSL_MODE_AUTO_RETRY as well? I guess not.
- SSL_CTX_set_mode (ctx->ssl_ctx,
- SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_ENABLE_PARTIAL_WRITE);
- return true;
-
-error_ssl_2:
- SSL_CTX_free (ctx->ssl_ctx);
- ctx->ssl_ctx = NULL;
-error_ssl_1:
- return false;
-}
-
-static bool
-irc_initialize_catalog (struct server_context *ctx, struct error **e)
-{
- hard_assert (ctx->catalog == (nl_catd) -1);
- const char *catalog = str_map_find (&ctx->config, "catalog");
- if (!catalog)
- return true;
-
- char *path = resolve_config_filename (catalog);
- if (!path)
- {
- error_set (e, "%s: %s", "cannot open file", catalog);
- return false;
- }
- ctx->catalog = catopen (path, NL_CAT_LOCALE);
- free (path);
-
- if (ctx->catalog == (nl_catd) -1)
- {
- error_set (e, "%s: %s",
- "failed reading the message catalog file", strerror (errno));
- return false;
- }
- return true;
-}
-
-static bool
-irc_initialize_motd (struct server_context *ctx, struct error **e)
-{
- hard_assert (ctx->motd.len == 0);
- const char *motd = str_map_find (&ctx->config, "motd");
- if (!motd)
- return true;
-
- char *path = resolve_config_filename (motd);
- if (!path)
- {
- error_set (e, "%s: %s", "cannot open file", motd);
- return false;
- }
- FILE *fp = fopen (path, "r");
- free (path);
-
- if (!fp)
- {
- error_set (e, "%s: %s",
- "failed reading the MOTD file", strerror (errno));
- return false;
- }
-
- struct str line;
- str_init (&line);
- while (read_line (fp, &line))
- str_vector_add_owned (&ctx->motd, str_steal (&line));
- str_free (&line);
-
- fclose (fp);
- return true;
-}
-
-/// This function handles values that require validation before their first use,
-/// or some kind of a transformation (such as conversion to an integer) needs
-/// to be done before they can be used directly.
-static bool
-irc_parse_config (struct server_context *ctx, struct error **e)
-{
- unsigned long ul;
-#define PARSE_UNSIGNED(name, min, max) \
- const char *name = str_map_find (&ctx->config, #name); \
- hard_assert (name != NULL); \
- if (!xstrtoul (&ul, name, 10) || ul > max || ul < min) \
- { \
- error_set (e, "invalid configuration value for `%s': %s", \
- #name, "the number is invalid or out of range"); \
- return false; \
- } \
- ctx->name = ul
-
- PARSE_UNSIGNED (ping_interval, 1, UINT_MAX);
- PARSE_UNSIGNED (max_connections, 0, UINT_MAX);
-
- bool result = true;
- struct str_vector fingerprints;
- str_vector_init (&fingerprints);
- const char *operators = str_map_find (&ctx->config, "operators");
- if (operators)
- split_str_ignore_empty (operators, ',', &fingerprints);
- for (size_t i = 0; i < fingerprints.len; i++)
- {
- const char *key = fingerprints.vector[i];
- if (!irc_is_valid_fingerprint (key))
- {
- error_set (e, "invalid configuration value for `%s': %s",
- "operators", "invalid fingerprint value");
- result = false;
- break;
- }
- str_map_set (&ctx->operators, key, (void *) 1);
- }
- str_vector_free (&fingerprints);
- return result;
-}
-
-static bool
-irc_initialize_server_name (struct server_context *ctx, struct error **e)
-{
- enum validation_result res;
- const char *server_name = str_map_find (&ctx->config, "server_name");
- if (server_name)
- {
- res = irc_validate_hostname (server_name);
- if (res != VALIDATION_OK)
- {
- error_set (e, "invalid configuration value for `%s': %s",
- "server_name", irc_validate_to_str (res));
- return false;
- }
- ctx->server_name = xstrdup (server_name);
- }
- else
- {
- char hostname[HOST_NAME_MAX];
- if (gethostname (hostname, sizeof hostname))
- {
- error_set (e, "%s: %s",
- "getting the hostname failed", strerror (errno));
- return false;
- }
- res = irc_validate_hostname (hostname);
- if (res != VALIDATION_OK)
- {
- error_set (e,
- "`%s' is not set and the hostname (`%s') cannot be used: %s",
- "server_name", hostname, irc_validate_to_str (res));
- return false;
- }
- ctx->server_name = xstrdup (hostname);
- }
- return true;
-}
-
-static int
-irc_listen (struct addrinfo *gai_iter)
-{
- int fd = socket (gai_iter->ai_family,
- gai_iter->ai_socktype, gai_iter->ai_protocol);
- if (fd == -1)
- return -1;
- set_cloexec (fd);
-
- int yes = 1;
- soft_assert (setsockopt (fd, SOL_SOCKET, SO_KEEPALIVE,
- &yes, sizeof yes) != -1);
- soft_assert (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
- &yes, sizeof yes) != -1);
-
- char real_host[NI_MAXHOST], real_port[NI_MAXSERV];
- real_host[0] = real_port[0] = '\0';
- int err = getnameinfo (gai_iter->ai_addr, gai_iter->ai_addrlen,
- real_host, sizeof real_host, real_port, sizeof real_port,
- NI_NUMERICHOST | NI_NUMERICSERV);
- if (err)
- print_debug ("%s: %s", "getnameinfo", gai_strerror (err));
-
- if (bind (fd, gai_iter->ai_addr, gai_iter->ai_addrlen))
- print_error ("bind to %s:%s failed: %s",
- real_host, real_port, strerror (errno));
- else if (listen (fd, 16 /* arbitrary number */))
- print_error ("listen at %s:%s failed: %s",
- real_host, real_port, strerror (errno));
- else
- {
- print_status ("listening at %s:%s", real_host, real_port);
- return fd;
- }
-
- xclose (fd);
- return -1;
-}
-
-static bool
-irc_setup_listen_fds (struct server_context *ctx, struct error **e)
-{
- const char *bind_host = str_map_find (&ctx->config, "bind_host");
- const char *bind_port = str_map_find (&ctx->config, "bind_port");
- hard_assert (bind_port != NULL); // We have a default value for this
-
- struct addrinfo gai_hints, *gai_result, *gai_iter;
- memset (&gai_hints, 0, sizeof gai_hints);
-
- gai_hints.ai_socktype = SOCK_STREAM;
- gai_hints.ai_flags = AI_PASSIVE;
-
- int err = getaddrinfo (bind_host, bind_port, &gai_hints, &gai_result);
- if (err)
- {
- error_set (e, "%s: %s: %s",
- "network setup failed", "getaddrinfo", gai_strerror (err));
- return false;
- }
-
- int fd;
- for (gai_iter = gai_result; gai_iter; gai_iter = gai_iter->ai_next)
- {
- if (ctx->n_listen_fds >= N_ELEMENTS (ctx->listen_fds))
- break;
- if ((fd = irc_listen (gai_iter)) == -1)
- continue;
-
- ctx->listen_fds[ctx->n_listen_fds++] = fd;
- set_blocking (fd, false);
- poller_set (&ctx->poller, fd, POLLIN,
- (poller_dispatcher_func) on_irc_client_available, ctx);
- break;
- }
- freeaddrinfo (gai_result);
-
- if (!ctx->n_listen_fds)
- {
- error_set (e, "network setup failed");
- return false;
- }
- return true;
-}
-
-// --- Main --------------------------------------------------------------------
-
-static void
-on_signal_pipe_readable (const struct pollfd *fd, struct server_context *ctx)
-{
- char *dummy;
- (void) read (fd->fd, &dummy, 1);
-
- if (g_termination_requested && !ctx->quitting)
- irc_initiate_quit (ctx);
-}
-
-static void
-daemonize (void)
-{
- // TODO: create and lock a PID file?
- print_status ("daemonizing...");
-
- if (chdir ("/"))
- exit_fatal ("%s: %s", "chdir", strerror (errno));
-
- pid_t pid;
- if ((pid = fork ()) < 0)
- exit_fatal ("%s: %s", "fork", strerror (errno));
- else if (pid)
- exit (EXIT_SUCCESS);
-
- setsid ();
- signal (SIGHUP, SIG_IGN);
-
- if ((pid = fork ()) < 0)
- exit_fatal ("%s: %s", "fork", strerror (errno));
- else if (pid)
- exit (EXIT_SUCCESS);
-
- openlog (PROGRAM_NAME, LOG_NDELAY | LOG_NOWAIT | LOG_PID, 0);
- g_log_message_real = log_message_syslog;
-
- // XXX: we may close our own descriptors this way, crippling ourselves
- for (int i = 0; i < 3; i++)
- xclose (i);
-
- int tty = open ("/dev/null", O_RDWR);
- if (tty != 0 || dup (0) != 1 || dup (0) != 2)
- exit_fatal ("failed to reopen FD's: %s", strerror (errno));
-}
-
-static void
-print_usage (const char *program_name)
-{
- fprintf (stderr,
- "Usage: %s [OPTION]...\n"
- "Experimental IRC server.\n"
- "\n"
- " -d, --debug run in debug mode (do not daemonize)\n"
- " -h, --help display this help and exit\n"
- " -V, --version output version information and exit\n"
- " --write-default-cfg [filename]\n"
- " write a default configuration file and exit\n",
- program_name);
-}
-
-int
-main (int argc, char *argv[])
-{
- const char *invocation_name = argv[0];
-
- static struct option opts[] =
- {
- { "debug", no_argument, NULL, 'd' },
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, 'V' },
- { "write-default-cfg", optional_argument, NULL, 'w' },
- { NULL, 0, NULL, 0 }
- };
-
- while (1)
- {
- int c, opt_index;
-
- c = getopt_long (argc, argv, "dhV", opts, &opt_index);
- if (c == -1)
- break;
-
- switch (c)
- {
- case 'd':
- g_debug_mode = true;
- break;
- case 'h':
- print_usage (invocation_name);
- exit (EXIT_SUCCESS);
- case 'V':
- printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
- exit (EXIT_SUCCESS);
- case 'w':
- call_write_default_config (optarg, g_config_table);
- exit (EXIT_SUCCESS);
- default:
- print_error ("wrong options");
- exit (EXIT_FAILURE);
- }
- }
-
- print_status (PROGRAM_NAME " " PROGRAM_VERSION " starting");
- setup_signal_handlers ();
-
- SSL_library_init ();
- atexit (EVP_cleanup);
- SSL_load_error_strings ();
- // XXX: ERR_load_BIO_strings()? Anything else?
- atexit (ERR_free_strings);
-
- struct server_context ctx;
- server_context_init (&ctx);
- irc_register_handlers (&ctx);
-
- struct error *e = NULL;
- if (!read_config_file (&ctx.config, &e))
- {
- print_error ("error loading configuration: %s", e->message);
- error_free (e);
- exit (EXIT_FAILURE);
- }
-
- poller_set (&ctx.poller, g_signal_pipe[0], POLLIN,
- (poller_dispatcher_func) on_signal_pipe_readable, &ctx);
-
- if (!irc_initialize_ssl (&ctx, &e)
- || !irc_initialize_server_name (&ctx, &e)
- || !irc_initialize_motd (&ctx, &e)
- || !irc_initialize_catalog (&ctx, &e)
- || !irc_parse_config (&ctx, &e)
- || !irc_setup_listen_fds (&ctx, &e))
- {
- print_error ("%s", e->message);
- error_free (e);
- exit (EXIT_FAILURE);
- }
-
- if (!g_debug_mode)
- daemonize ();
-
- ctx.polling = true;
- while (ctx.polling)
- poller_run (&ctx.poller);
-
- server_context_free (&ctx);
- return EXIT_SUCCESS;
-}
diff --git a/src/siphash.c b/src/siphash.c
deleted file mode 100644
index 7a5c8d4..0000000
--- a/src/siphash.c
+++ /dev/null
@@ -1,87 +0,0 @@
-// Code taken from https://github.com/floodyberry/siphash with some edits.
-//
-// To the extent possible under law, the author(s) have dedicated all copyright
-// and related and neighboring rights to this software to the public domain
-// worldwide. This software is distributed without any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication along
-// with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-
-#include "siphash.h"
-
-inline static uint64_t
-u8to64_le (const unsigned char *p)
-{
- return
- (uint64_t) p[0] |
- (uint64_t) p[1] << 8 |
- (uint64_t) p[2] << 16 |
- (uint64_t) p[3] << 24 |
- (uint64_t) p[4] << 32 |
- (uint64_t) p[5] << 40 |
- (uint64_t) p[6] << 48 |
- (uint64_t) p[7] << 56 ;
-}
-
-uint64_t
-siphash (const unsigned char key[16], const unsigned char *m, size_t len)
-{
- uint64_t v0, v1, v2, v3;
- uint64_t mi, k0, k1;
- uint64_t last7;
- size_t i, blocks;
-
- k0 = u8to64_le (key + 0);
- k1 = u8to64_le (key + 8);
- v0 = k0 ^ 0x736f6d6570736575ull;
- v1 = k1 ^ 0x646f72616e646f6dull;
- v2 = k0 ^ 0x6c7967656e657261ull;
- v3 = k1 ^ 0x7465646279746573ull;
-
- last7 = (uint64_t) (len & 0xff) << 56;
-
-#define ROTL64(a,b) (((a)<<(b))|((a)>>(64-b)))
-
-#define COMPRESS \
- v0 += v1; v2 += v3; \
- v1 = ROTL64 (v1,13); v3 = ROTL64 (v3,16); \
- v1 ^= v0; v3 ^= v2; \
- v0 = ROTL64 (v0,32); \
- v2 += v1; v0 += v3; \
- v1 = ROTL64 (v1,17); v3 = ROTL64 (v3,21); \
- v1 ^= v2; v3 ^= v0; \
- v2 = ROTL64(v2,32);
-
- for (i = 0, blocks = (len & ~(size_t) 7); i < blocks; i += 8)
- {
- mi = u8to64_le (m + i);
- v3 ^= mi;
- COMPRESS
- COMPRESS
- v0 ^= mi;
- }
-
- switch (len - blocks)
- {
- case 7: last7 |= (uint64_t) m[i + 6] << 48;
- case 6: last7 |= (uint64_t) m[i + 5] << 40;
- case 5: last7 |= (uint64_t) m[i + 4] << 32;
- case 4: last7 |= (uint64_t) m[i + 3] << 24;
- case 3: last7 |= (uint64_t) m[i + 2] << 16;
- case 2: last7 |= (uint64_t) m[i + 1] << 8;
- case 1: last7 |= (uint64_t) m[i + 0] ;
- default:;
- };
- v3 ^= last7;
- COMPRESS
- COMPRESS
- v0 ^= last7;
- v2 ^= 0xff;
- COMPRESS
- COMPRESS
- COMPRESS
- COMPRESS
-
- return v0 ^ v1 ^ v2 ^ v3;
-}
-
diff --git a/src/siphash.h b/src/siphash.h
deleted file mode 100644
index dca7c42..0000000
--- a/src/siphash.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef SIPHASH_H
-#define SIPHASH_H
-
-#include <stdint.h>
-#include <stdlib.h>
-
-uint64_t siphash (const unsigned char key[16],
- const unsigned char *m, size_t len);
-
-#endif // SIPHASH_H
diff --git a/src/zyklonb.c b/src/zyklonb.c
deleted file mode 100644
index c99b141..0000000
--- a/src/zyklonb.c
+++ /dev/null
@@ -1,1769 +0,0 @@
-/*
- * zyklonb.c: the experimental IRC bot
- *
- * Copyright (c) 2014, Přemysl Janouch <p.janouch@gmail.com>
- * All rights reserved.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#define PROGRAM_NAME "ZyklonB"
-#define PROGRAM_VERSION "alpha"
-
-#include "common.c"
-
-// --- Configuration (application-specific) ------------------------------------
-
-static struct config_item g_config_table[] =
-{
- { "nickname", "ZyklonB", "IRC nickname" },
- { "username", "bot", "IRC user name" },
- { "realname", "ZyklonB IRC bot", "IRC real name/e-mail" },
-
- { "irc_host", NULL, "Address of the IRC server" },
- { "irc_port", "6667", "Port of the IRC server" },
- { "ssl_use", "off", "Whether to use SSL" },
- { "ssl_cert", NULL, "Client SSL certificate (PEM)" },
- { "autojoin", NULL, "Channels to join on start" },
- { "reconnect", "on", "Whether to reconnect on error" },
- { "reconnect_delay", "5", "Time between reconnecting" },
-
- { "prefix", ":", "The prefix for bot commands" },
- { "admin", NULL, "Host mask for administrators" },
- { "plugins", NULL, "The plugins to load on startup" },
- { "plugin_dir", NULL, "Where to search for plugins" },
- { "recover", "on", "Whether to re-launch on crash" },
-
- { NULL, NULL, NULL }
-};
-
-// --- Application data --------------------------------------------------------
-
-struct plugin_data
-{
- LIST_HEADER (plugin_data)
- struct bot_context *ctx; ///< Parent context
-
- char *name; ///< Plugin identifier
- pid_t pid; ///< PID of the plugin process
-
- bool is_zombie; ///< Whether the child is a zombie
- bool initialized; ///< Ready to exchange IRC messages
- struct str queued_output; ///< Output queued up until initialized
-
- // Since we're doing non-blocking I/O, we need to queue up data so that
- // we don't stall on plugins unnecessarily.
-
- int read_fd; ///< The read end of the comm. pipe
- int write_fd; ///< The write end of the comm. pipe
-
- struct str read_buffer; ///< Unprocessed input
- struct str write_buffer; ///< Output yet to be sent out
-};
-
-static void
-plugin_data_init (struct plugin_data *self)
-{
- memset (self, 0, sizeof *self);
-
- self->pid = -1;
- str_init (&self->queued_output);
-
- self->read_fd = -1;
- str_init (&self->read_buffer);
- self->write_fd = -1;
- str_init (&self->write_buffer);
-}
-
-static void
-plugin_data_free (struct plugin_data *self)
-{
- soft_assert (self->pid == -1);
- free (self->name);
-
- str_free (&self->read_buffer);
- if (!soft_assert (self->read_fd == -1))
- xclose (self->read_fd);
-
- str_free (&self->write_buffer);
- if (!soft_assert (self->write_fd == -1))
- xclose (self->write_fd);
-
- if (!self->initialized)
- str_free (&self->queued_output);
-}
-
-struct bot_context
-{
- struct str_map config; ///< User configuration
- regex_t *admin_re; ///< Regex to match our administrator
-
- int irc_fd; ///< Socket FD of the server
- struct str read_buffer; ///< Input yet to be processed
- bool irc_ready; ///< Whether we may send messages now
-
- SSL_CTX *ssl_ctx; ///< SSL context
- SSL *ssl; ///< SSL connection
-
- struct plugin_data *plugins; ///< Linked list of plugins
- struct str_map plugins_by_name; ///< Indexes @em plugins by their name
-
- struct poller poller; ///< Manages polled descriptors
- bool quitting; ///< User requested quitting
- bool polling; ///< The event loop is running
-};
-
-static void
-bot_context_init (struct bot_context *self)
-{
- str_map_init (&self->config);
- self->config.free = free;
- load_config_defaults (&self->config, g_config_table);
- self->admin_re = NULL;
-
- self->irc_fd = -1;
- str_init (&self->read_buffer);
- self->irc_ready = false;
-
- self->ssl = NULL;
- self->ssl_ctx = NULL;
-
- self->plugins = NULL;
- str_map_init (&self->plugins_by_name);
-
- poller_init (&self->poller);
- self->quitting = false;
- self->polling = false;
-}
-
-static void
-bot_context_free (struct bot_context *self)
-{
- str_map_free (&self->config);
- if (self->admin_re)
- regex_free (self->admin_re);
- str_free (&self->read_buffer);
-
- // TODO: terminate the plugins properly before this is called
- struct plugin_data *link, *tmp;
- for (link = self->plugins; link; link = tmp)
- {
- tmp = link->next;
- plugin_data_free (link);
- free (link);
- }
-
- if (self->irc_fd != -1)
- xclose (self->irc_fd);
- if (self->ssl)
- SSL_free (self->ssl);
- if (self->ssl_ctx)
- SSL_CTX_free (self->ssl_ctx);
-
- str_map_free (&self->plugins_by_name);
- poller_free (&self->poller);
-}
-
-static void
-irc_shutdown (struct bot_context *ctx)
-{
- // Generally non-critical
- if (ctx->ssl)
- soft_assert (SSL_shutdown (ctx->ssl) != -1);
- else
- soft_assert (shutdown (ctx->irc_fd, SHUT_WR) == 0);
-}
-
-static void
-initiate_quit (struct bot_context *ctx)
-{
- irc_shutdown (ctx);
- ctx->quitting = true;
-}
-
-static void
-try_finish_quit (struct bot_context *ctx)
-{
- if (!ctx->quitting)
- return;
- if (ctx->irc_fd == -1 && !ctx->plugins)
- ctx->polling = false;
-}
-
-static bool irc_send (struct bot_context *ctx,
- const char *format, ...) ATTRIBUTE_PRINTF (2, 3);
-
-// XXX: is it okay to just ignore the return value and wait until we receive
-// it in on_irc_readable()?
-static bool
-irc_send (struct bot_context *ctx, const char *format, ...)
-{
- va_list ap;
-
- if (g_debug_mode)
- {
- fputs ("[IRC] <== \"", stderr);
- va_start (ap, format);
- vfprintf (stderr, format, ap);
- va_end (ap);
- fputs ("\"\n", stderr);
- }
-
- if (!soft_assert (ctx->irc_fd != -1))
- return false;
-
- va_start (ap, format);
- struct str str;
- str_init (&str);
- str_append_vprintf (&str, format, ap);
- str_append (&str, "\r\n");
- va_end (ap);
-
- bool result = true;
- if (ctx->ssl)
- {
- // TODO: call SSL_get_error() to detect if a clean shutdown has occured
- if (SSL_write (ctx->ssl, str.str, str.len) != (int) str.len)
- {
- print_debug ("%s: %s: %s", __func__, "SSL_write",
- ERR_error_string (ERR_get_error (), NULL));
- result = false;
- }
- }
- else if (write (ctx->irc_fd, str.str, str.len) != (ssize_t) str.len)
- {
- print_debug ("%s: %s: %s", __func__, "write", strerror (errno));
- result = false;
- }
-
- str_free (&str);
- return result;
-}
-
-static bool
-irc_initialize_ssl (struct bot_context *ctx, struct error **e)
-{
- ctx->ssl_ctx = SSL_CTX_new (SSLv23_client_method ());
- if (!ctx->ssl_ctx)
- goto error_ssl_1;
- // We don't care; some encryption is always better than no encryption
- SSL_CTX_set_verify (ctx->ssl_ctx, SSL_VERIFY_NONE, NULL);
- // XXX: maybe we should call SSL_CTX_set_options() for some workarounds
-
- ctx->ssl = SSL_new (ctx->ssl_ctx);
- if (!ctx->ssl)
- goto error_ssl_2;
-
- const char *ssl_cert = str_map_find (&ctx->config, "ssl_cert");
- if (ssl_cert)
- {
- char *path = resolve_config_filename (ssl_cert);
- if (!path)
- print_error ("%s: %s", "cannot open file", ssl_cert);
- // XXX: perhaps we should read the file ourselves for better messages
- else if (!SSL_use_certificate_file (ctx->ssl, path, SSL_FILETYPE_PEM))
- print_error ("%s: %s", "setting the SSL client certificate failed",
- ERR_error_string (ERR_get_error (), NULL));
- free (path);
- }
-
- SSL_set_connect_state (ctx->ssl);
- if (!SSL_set_fd (ctx->ssl, ctx->irc_fd))
- goto error_ssl_3;
- // Avoid SSL_write() returning SSL_ERROR_WANT_READ
- SSL_set_mode (ctx->ssl, SSL_MODE_AUTO_RETRY);
- if (SSL_connect (ctx->ssl) > 0)
- return true;
-
-error_ssl_3:
- SSL_free (ctx->ssl);
- ctx->ssl = NULL;
-error_ssl_2:
- SSL_CTX_free (ctx->ssl_ctx);
- ctx->ssl_ctx = NULL;
-error_ssl_1:
- // XXX: these error strings are really nasty; also there could be
- // multiple errors on the OpenSSL stack.
- error_set (e, "%s: %s", "could not initialize SSL",
- ERR_error_string (ERR_get_error (), NULL));
- return false;
-}
-
-static bool
-irc_establish_connection (struct bot_context *ctx,
- const char *host, const char *port, bool use_ssl, struct error **e)
-{
- struct addrinfo gai_hints, *gai_result, *gai_iter;
- memset (&gai_hints, 0, sizeof gai_hints);
-
- // We definitely want TCP.
- gai_hints.ai_socktype = SOCK_STREAM;
-
- int err = getaddrinfo (host, port, &gai_hints, &gai_result);
- if (err)
- {
- error_set (e, "%s: %s: %s",
- "connection failed", "getaddrinfo", gai_strerror (err));
- return false;
- }
-
- int sockfd;
- for (gai_iter = gai_result; gai_iter; gai_iter = gai_iter->ai_next)
- {
- sockfd = socket (gai_iter->ai_family,
- gai_iter->ai_socktype, gai_iter->ai_protocol);
- if (sockfd == -1)
- continue;
- set_cloexec (sockfd);
-
- int yes = 1;
- soft_assert (setsockopt (sockfd, SOL_SOCKET, SO_KEEPALIVE,
- &yes, sizeof yes) != -1);
-
- const char *real_host = host;
-
- // Let's try to resolve the address back into a real hostname;
- // we don't really need this, so we can let it quietly fail
- char buf[NI_MAXHOST];
- err = getnameinfo (gai_iter->ai_addr, gai_iter->ai_addrlen,
- buf, sizeof buf, NULL, 0, 0);
- if (err)
- print_debug ("%s: %s", "getnameinfo", gai_strerror (err));
- else
- real_host = buf;
-
- // XXX: we shouldn't mix these statuses with `struct error'; choose 1!
- print_status ("connecting to `%s:%s'...", real_host, port);
- if (!connect (sockfd, gai_iter->ai_addr, gai_iter->ai_addrlen))
- break;
-
- xclose (sockfd);
- }
-
- freeaddrinfo (gai_result);
-
- if (!gai_iter)
- {
- error_set (e, "connection failed");
- return false;
- }
-
- ctx->irc_fd = sockfd;
- if (use_ssl && !irc_initialize_ssl (ctx, e))
- {
- xclose (ctx->irc_fd);
- ctx->irc_fd = -1;
- return false;
- }
-
- print_status ("connection established");
- return true;
-}
-
-// --- Signals -----------------------------------------------------------------
-
-static int g_signal_pipe[2]; ///< A pipe used to signal... signals
-
-static struct str_vector
- g_original_argv, ///< Original program arguments
- g_recovery_env; ///< Environment for re-exec recovery
-
-/// Program termination has been requested by a signal
-static volatile sig_atomic_t g_termination_requested;
-
-/// Points to startup reason location within `g_recovery_environment'
-static char **g_startup_reason_location;
-/// The environment variable used to pass the startup reason when re-executing
-static const char g_startup_reason_str[] = "STARTUP_REASON";
-
-static void
-sigchld_handler (int signum)
-{
- (void) signum;
-
- int original_errno = errno;
- // Just so that the read end of the pipe wakes up the poller.
- // NOTE: Linux has signalfd() and eventfd(), and the BSD's have kqueue.
- // All of them are better than this approach, although platform-specific.
- if (write (g_signal_pipe[1], "c", 1) == -1)
- soft_assert (errno == EAGAIN);
- errno = original_errno;
-}
-
-static void
-sigterm_handler (int signum)
-{
- (void) signum;
-
- g_termination_requested = true;
-
- int original_errno = errno;
- if (write (g_signal_pipe[1], "t", 1) == -1)
- soft_assert (errno == EAGAIN);
- errno = original_errno;
-}
-
-static void
-setup_signal_handlers (void)
-{
- if (pipe (g_signal_pipe) == -1)
- exit_fatal ("%s: %s", "pipe", strerror (errno));
-
- set_cloexec (g_signal_pipe[0]);
- set_cloexec (g_signal_pipe[1]);
-
- // So that the pipe cannot overflow; it would make write() block within
- // the signal handler, which is something we really don't want to happen.
- // The same holds true for read().
- set_blocking (g_signal_pipe[0], false);
- set_blocking (g_signal_pipe[1], false);
-
- struct sigaction sa;
- sa.sa_flags = SA_RESTART;
- sa.sa_handler = sigchld_handler;
- sigemptyset (&sa.sa_mask);
-
- if (sigaction (SIGCHLD, &sa, NULL) == -1)
- exit_fatal ("sigaction: %s", strerror (errno));
-
- signal (SIGPIPE, SIG_IGN);
-
- sa.sa_handler = sigterm_handler;
- if (sigaction (SIGINT, &sa, NULL) == -1
- || sigaction (SIGTERM, &sa, NULL) == -1)
- exit_fatal ("sigaction: %s", strerror (errno));
-}
-
-static void
-translate_signal_info (int no, const char **name, int code, const char **reason)
-{
- if (code == SI_USER) *reason = "signal sent by kill()";
- if (code == SI_QUEUE) *reason = "signal sent by sigqueue()";
-
- switch (no)
- {
- case SIGILL:
- *name = "SIGILL";
- if (code == ILL_ILLOPC) *reason = "illegal opcode";
- if (code == ILL_ILLOPN) *reason = "illegal operand";
- if (code == ILL_ILLADR) *reason = "illegal addressing mode";
- if (code == ILL_ILLTRP) *reason = "illegal trap";
- if (code == ILL_PRVOPC) *reason = "privileged opcode";
- if (code == ILL_PRVREG) *reason = "privileged register";
- if (code == ILL_COPROC) *reason = "coprocessor error";
- if (code == ILL_BADSTK) *reason = "internal stack error";
- break;
- case SIGFPE:
- *name = "SIGFPE";
- if (code == FPE_INTDIV) *reason = "integer divide by zero";
- if (code == FPE_INTOVF) *reason = "integer overflow";
- if (code == FPE_FLTDIV) *reason = "floating-point divide by zero";
- if (code == FPE_FLTOVF) *reason = "floating-point overflow";
- if (code == FPE_FLTUND) *reason = "floating-point underflow";
- if (code == FPE_FLTRES) *reason = "floating-point inexact result";
- if (code == FPE_FLTINV) *reason = "invalid floating-point operation";
- if (code == FPE_FLTSUB) *reason = "subscript out of range";
- break;
- case SIGSEGV:
- *name = "SIGSEGV";
- if (code == SEGV_MAPERR)
- *reason = "address not mapped to object";
- if (code == SEGV_ACCERR)
- *reason = "invalid permissions for mapped object";
- break;
- case SIGBUS:
- *name = "SIGBUS";
- if (code == BUS_ADRALN) *reason = "invalid address alignment";
- if (code == BUS_ADRERR) *reason = "nonexistent physical address";
- if (code == BUS_OBJERR) *reason = "object-specific hardware error";
- break;
- default:
- *name = NULL;
- }
-}
-
-static void
-recovery_handler (int signum, siginfo_t *info, void *context)
-{
- (void) context;
-
- // TODO: maybe try to force a core dump like this: if (fork() == 0) return;
- // TODO: maybe we could even send "\r\nQUIT :reason\r\n" to the server. >_>
- // As long as we're not connected via TLS, that is.
-
- const char *signal_name = NULL, *reason = NULL;
- translate_signal_info (signum, &signal_name, info->si_code, &reason);
-
- char buf[128], numbuf[8];
- if (!signal_name)
- {
- snprintf (numbuf, sizeof numbuf, "%d", signum);
- signal_name = numbuf;
- }
-
- if (reason)
- snprintf (buf, sizeof buf, "%s=%s: %s: %s", g_startup_reason_str,
- "signal received", signal_name, reason);
- else
- snprintf (buf, sizeof buf, "%s=%s: %s", g_startup_reason_str,
- "signal received", signal_name);
- *g_startup_reason_location = buf;
-
- // TODO: maybe pregenerate the path, see the following for some other ways
- // that would be illegal to do from within a signal handler:
- // http://stackoverflow.com/a/1024937
- // http://stackoverflow.com/q/799679
- // Especially if we change the current working directory in the program.
- //
- // Note that I can just overwrite g_orig_argv[0].
-
- // NOTE: our children will read EOF on the read ends of their pipes as a
- // a result of O_CLOEXEC. That should be enough to make them terminate.
-
- char **argv = g_original_argv.vector, **argp = g_recovery_env.vector;
- execve ("/proc/self/exe", argv, argp); // Linux
- execve ("/proc/curproc/file", argv, argp); // BSD
- execve ("/proc/curproc/exe", argv, argp); // BSD
- execve ("/proc/self/path/a.out", argv, argp); // Solaris
- execve (argv[0], argv, argp); // unreliable fallback
-
- // Let's just crash
- perror ("execve");
- signal (signum, SIG_DFL);
- raise (signum);
-}
-
-static void
-prepare_recovery_environment (void)
-{
- str_vector_init (&g_recovery_env);
- str_vector_add_vector (&g_recovery_env, environ);
-
- // Prepare a location within the environment where we will put the startup
- // (or maybe rather restart) reason in case of an irrecoverable error.
- char **iter;
- for (iter = g_recovery_env.vector; *iter; iter++)
- {
- const size_t len = sizeof g_startup_reason_str - 1;
- if (!strncmp (*iter, g_startup_reason_str, len) && (*iter)[len] == '=')
- break;
- }
-
- if (iter)
- g_startup_reason_location = iter;
- else
- {
- str_vector_add (&g_recovery_env, "");
- g_startup_reason_location =
- g_recovery_env.vector + g_recovery_env.len - 1;
- }
-}
-
-static void
-setup_recovery_handler (struct bot_context *ctx)
-{
- const char *recover_str = str_map_find (&ctx->config, "recover");
- hard_assert (recover_str != NULL); // We have a default value for this
-
- bool recover;
- if (!set_boolean_if_valid (&recover, recover_str))
- {
- print_error ("invalid configuration value for `%s'", "recover");
- exit (EXIT_FAILURE);
- }
- if (!recover)
- return;
-
- // Make sure these signals aren't blocked, otherwise we would be unable
- // to handle them, making the critical conditions fatal.
- sigset_t mask;
- sigemptyset (&mask);
- sigaddset (&mask, SIGSEGV);
- sigaddset (&mask, SIGBUS);
- sigaddset (&mask, SIGFPE);
- sigaddset (&mask, SIGILL);
- sigprocmask (SIG_UNBLOCK, &mask, NULL);
-
- struct sigaction sa;
- sa.sa_flags = SA_SIGINFO;
- sa.sa_sigaction = recovery_handler;
- sigemptyset (&sa.sa_mask);
-
- prepare_recovery_environment ();
-
- // TODO: also handle SIGABRT... or avoid doing abort() in the first place?
- if (sigaction (SIGSEGV, &sa, NULL) == -1
- || sigaction (SIGBUS, &sa, NULL) == -1
- || sigaction (SIGFPE, &sa, NULL) == -1
- || sigaction (SIGILL, &sa, NULL) == -1)
- print_error ("sigaction: %s", strerror (errno));
-}
-
-// --- Plugins -----------------------------------------------------------------
-
-/// The name of the special IRC command for interprocess communication
-static const char *plugin_ipc_command = "ZYKLONB";
-
-static struct plugin_data *
-plugin_find_by_pid (struct bot_context *ctx, pid_t pid)
-{
- struct plugin_data *iter;
- for (iter = ctx->plugins; iter; iter = iter->next)
- if (iter->pid == pid)
- return iter;
- return NULL;
-}
-
-static bool
-plugin_zombify (struct plugin_data *plugin)
-{
- if (plugin->is_zombie)
- return false;
-
- // FIXME: make sure that we don't remove entries from the poller while we
- // still may have stuff to read; maybe just check that the read pipe is
- // empty before closing it... and then on EOF check if `pid == -1' and
- // only then dispose of it (it'd be best to simulate that both of these
- // cases may happen).
- ssize_t poller_idx =
- poller_find_by_fd (&plugin->ctx->poller, plugin->write_fd);
- if (poller_idx != -1)
- poller_remove_at_index (&plugin->ctx->poller, poller_idx);
-
- // TODO: try to flush the write buffer (non-blocking)?
-
- // The plugin should terminate itself after it receives EOF.
- xclose (plugin->write_fd);
- plugin->write_fd = -1;
-
- // Make it a pseudo-anonymous zombie. In this state we process any
- // remaining commands it attempts to send to us before it finally dies.
- str_map_set (&plugin->ctx->plugins_by_name, plugin->name, NULL);
- plugin->is_zombie = true;
- return true;
-}
-
-static void
-on_plugin_writable (const struct pollfd *fd, struct plugin_data *plugin)
-{
- struct bot_context *ctx = plugin->ctx;
- struct str *buf = &plugin->write_buffer;
- size_t written_total = 0;
-
- if (fd->revents & ~(POLLOUT | POLLHUP | POLLERR))
- print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
-
- while (written_total != buf->len)
- {
- ssize_t n_written = write (fd->fd, buf->str + written_total,
- buf->len - written_total);
-
- if (n_written < 0)
- {
- if (errno == EAGAIN)
- break;
- if (errno == EINTR)
- continue;
-
- soft_assert (errno == EPIPE);
- // Zombies shouldn't get dispatched for writability
- hard_assert (!plugin->is_zombie);
-
- print_debug ("%s: %s", "write", strerror (errno));
- print_error ("failure on writing to plugin `%s',"
- " therefore I'm unloading it", plugin->name);
- plugin_zombify (plugin);
- break;
- }
-
- // This may be equivalent to EAGAIN on some implementations
- if (n_written == 0)
- break;
-
- written_total += n_written;
- }
-
- if (written_total != 0)
- str_remove_slice (buf, 0, written_total);
-
- if (buf->len == 0)
- {
- // Everything has been written, there's no need to end up in here again
- ssize_t index = poller_find_by_fd (&ctx->poller, fd->fd);
- if (index != -1)
- poller_remove_at_index (&ctx->poller, index);
- }
-}
-
-static void
-plugin_queue_write (struct plugin_data *plugin)
-{
- if (plugin->is_zombie)
- return;
-
- // Don't let the write buffer grow infinitely. If there's a ton of data
- // waiting to be processed by the plugin, it usually means there's something
- // wrong with it (such as someone stopping the process).
- if (plugin->write_buffer.len >= (1 << 20))
- {
- print_warning ("plugin `%s' does not seem to process messages fast"
- " enough, I'm unloading it", plugin->name);
- plugin_zombify (plugin);
- return;
- }
-
- poller_set (&plugin->ctx->poller, plugin->write_fd, POLLOUT,
- (poller_dispatcher_func) on_plugin_writable, plugin);
-}
-
-static void
-plugin_send (struct plugin_data *plugin, const char *format, ...)
- ATTRIBUTE_PRINTF (2, 3);
-
-static void
-plugin_send (struct plugin_data *plugin, const char *format, ...)
-{
- va_list ap;
-
- if (g_debug_mode)
- {
- fprintf (stderr, "[%s] <-- \"", plugin->name);
- va_start (ap, format);
- vfprintf (stderr, format, ap);
- va_end (ap);
- fputs ("\"\n", stderr);
- }
-
- va_start (ap, format);
- str_append_vprintf (&plugin->write_buffer, format, ap);
- va_end (ap);
- str_append (&plugin->write_buffer, "\r\n");
-
- plugin_queue_write (plugin);
-}
-
-static void
-plugin_process_message (const struct irc_message *msg,
- const char *raw, void *user_data)
-{
- struct plugin_data *plugin = user_data;
- struct bot_context *ctx = plugin->ctx;
-
- if (g_debug_mode)
- fprintf (stderr, "[%s] --> \"%s\"\n", plugin->name, raw);
-
- if (!strcasecmp (msg->command, plugin_ipc_command))
- {
- // Replies are sent in the order in which they came in, so there's
- // no need to attach a special identifier to them. It might be
- // desirable in some cases, though.
-
- if (msg->params.len < 1)
- return;
-
- const char *command = msg->params.vector[0];
- if (!plugin->initialized && !strcasecmp (command, "register"))
- {
- // Register for relaying of IRC traffic
- plugin->initialized = true;
-
- // Flush any queued up traffic here. The point of queuing it in
- // the first place is so that we don't have to wait for plugin
- // initialization during startup.
- //
- // Note that if we start filtering data coming to the plugins e.g.
- // based on what it tells us upon registration, we might need to
- // filter `queued_output' as well.
- str_append_str (&plugin->write_buffer, &plugin->queued_output);
- str_free (&plugin->queued_output);
-
- // NOTE: this may trigger the buffer length check
- plugin_queue_write (plugin);
- }
- else if (!strcasecmp (command, "get_config"))
- {
- if (msg->params.len < 2)
- return;
-
- const char *value =
- str_map_find (&ctx->config, msg->params.vector[1]);
- // TODO: escape the value (although there's no need to ATM)
- plugin_send (plugin, "%s :%s",
- plugin_ipc_command, value ? value : "");
- }
- else if (!strcasecmp (command, "print"))
- {
- if (msg->params.len < 2)
- return;
-
- printf ("%s\n", msg->params.vector[1]);
- }
- }
- else if (plugin->initialized && ctx->irc_ready)
- {
- // Pass everything else through to the IRC server
- // XXX: when the server isn't ready yet, these messages get silently
- // discarded, which shouldn't pose a problem most of the time.
- // Perhaps we could send a "connected" notification on `register'
- // if `irc_ready' is true, or after it becomes true later, so that
- // plugins know when to start sending unprovoked IRC messages.
- // XXX: another case is when the connection gets interrupted and the
- // plugin tries to send something back while we're reconnecting.
- // For that we might set up a global buffer that gets flushed out
- // after `irc_ready' becomes true. Note that there is always some
- // chance of messages getting lost without us even noticing it.
- irc_send (ctx, "%s", raw);
- }
-}
-
-static void
-on_plugin_readable (const struct pollfd *fd, struct plugin_data *plugin)
-{
- if (fd->revents & ~(POLLIN | POLLHUP | POLLERR))
- print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
-
- // TODO: see if I can reuse irc_fill_read_buffer()
- struct str *buf = &plugin->read_buffer;
- while (true)
- {
- str_ensure_space (buf, 512 + 1);
- ssize_t n_read = read (fd->fd, buf->str + buf->len,
- buf->alloc - buf->len - 1);
-
- if (n_read < 0)
- {
- if (errno == EAGAIN)
- break;
- if (soft_assert (errno == EINTR))
- continue;
-
- if (!plugin->is_zombie)
- {
- print_error ("failure on reading from plugin `%s',"
- " therefore I'm unloading it", plugin->name);
- plugin_zombify (plugin);
- }
- return;
- }
-
- // EOF; hopefully it will die soon (maybe it already has)
- if (n_read == 0)
- break;
-
- buf->str[buf->len += n_read] = '\0';
- if (buf->len >= (1 << 20))
- {
- // XXX: this isn't really the best flood prevention mechanism,
- // but it wasn't even supposed to be one.
- if (plugin->is_zombie)
- {
- print_error ("a zombie of plugin `%s' is trying to flood us,"
- " therefore I'm killing it", plugin->name);
- kill (plugin->pid, SIGKILL);
- }
- else
- {
- print_error ("plugin `%s' seems to spew out data frantically,"
- " therefore I'm unloading it", plugin->name);
- plugin_zombify (plugin);
- }
- return;
- }
- }
-
- irc_process_buffer (buf, plugin_process_message, plugin);
-}
-
-static bool
-is_valid_plugin_name (const char *name)
-{
- if (!*name)
- return false;
- for (const char *p = name; *p; p++)
- if (!isgraph (*p) || *p == '/')
- return false;
- return true;
-}
-
-static bool
-plugin_load (struct bot_context *ctx, const char *name, struct error **e)
-{
- const char *plugin_dir = str_map_find (&ctx->config, "plugin_dir");
- if (!plugin_dir)
- {
- error_set (e, "plugin directory not set");
- return false;
- }
-
- if (!is_valid_plugin_name (name))
- {
- error_set (e, "invalid plugin name");
- return false;
- }
-
- if (str_map_find (&ctx->plugins_by_name, name))
- {
- error_set (e, "the plugin has already been loaded");
- return false;
- }
-
- int stdin_pipe[2];
- if (pipe (stdin_pipe) == -1)
- {
- error_set (e, "%s: %s: %s",
- "failed to load the plugin", "pipe", strerror (errno));
- goto fail_1;
- }
-
- int stdout_pipe[2];
- if (pipe (stdout_pipe) == -1)
- {
- error_set (e, "%s: %s: %s",
- "failed to load the plugin", "pipe", strerror (errno));
- goto fail_2;
- }
-
- set_cloexec (stdin_pipe[1]);
- set_cloexec (stdout_pipe[0]);
-
- pid_t pid = fork ();
- if (pid == -1)
- {
- error_set (e, "%s: %s: %s",
- "failed to load the plugin", "fork", strerror (errno));
- goto fail_3;
- }
-
- if (pid == 0)
- {
- // Redirect the child's stdin and stdout to the pipes
- hard_assert (dup2 (stdin_pipe[0], STDIN_FILENO) != -1);
- hard_assert (dup2 (stdout_pipe[1], STDOUT_FILENO) != -1);
-
- xclose (stdin_pipe[0]);
- xclose (stdout_pipe[1]);
-
- struct str pathname;
- str_init (&pathname);
- str_append (&pathname, plugin_dir);
- str_append_c (&pathname, '/');
- str_append (&pathname, name);
-
- // Restore some of the signal handling
- signal (SIGPIPE, SIG_DFL);
-
- char *const argv[] = { pathname.str, NULL };
- execve (argv[0], argv, environ);
-
- // We will collect the failure later via SIGCHLD
- print_error ("%s: %s: %s",
- "failed to load the plugin", "exec", strerror (errno));
- _exit (EXIT_FAILURE);
- }
-
- xclose (stdin_pipe[0]);
- xclose (stdout_pipe[1]);
-
- set_blocking (stdout_pipe[0], false);
- set_blocking (stdin_pipe[1], false);
-
- struct plugin_data *plugin = xmalloc (sizeof *plugin);
- plugin_data_init (plugin);
- plugin->ctx = ctx;
- plugin->pid = pid;
- plugin->name = xstrdup (name);
- plugin->read_fd = stdout_pipe[0];
- plugin->write_fd = stdin_pipe[1];
-
- LIST_PREPEND (ctx->plugins, plugin);
- str_map_set (&ctx->plugins_by_name, name, plugin);
-
- poller_set (&ctx->poller, stdout_pipe[0], POLLIN,
- (poller_dispatcher_func) on_plugin_readable, plugin);
- return true;
-
-fail_3:
- xclose (stdout_pipe[0]);
- xclose (stdout_pipe[1]);
-fail_2:
- xclose (stdin_pipe[0]);
- xclose (stdin_pipe[1]);
-fail_1:
- return false;
-}
-
-static bool
-plugin_unload (struct bot_context *ctx, const char *name, struct error **e)
-{
- struct plugin_data *plugin = str_map_find (&ctx->plugins_by_name, name);
-
- if (!plugin)
- {
- error_set (e, "no such plugin is loaded");
- return false;
- }
-
- plugin_zombify (plugin);
-
- // TODO: add a `kill zombies' command to forcefully get rid of processes
- // that do not understand the request.
- // TODO: set a timeout before we go for a kill automatically (and if this
- // was a reload request, try to bring the plugin back up)
- return true;
-}
-
-static void
-plugin_load_all_from_config (struct bot_context *ctx)
-{
- const char *plugin_list = str_map_find (&ctx->config, "plugins");
- if (!plugin_list)
- return;
-
- struct str_vector plugins;
- str_vector_init (&plugins);
-
- split_str_ignore_empty (plugin_list, ',', &plugins);
- for (size_t i = 0; i < plugins.len; i++)
- {
- char *name = strip_str_in_place (plugins.vector[i], " ");
-
- struct error *e = NULL;
- if (!plugin_load (ctx, name, &e))
- {
- print_error ("plugin `%s' failed to load: %s", name, e->message);
- error_free (e);
- }
- }
-
- str_vector_free (&plugins);
-}
-
-// --- Main program ------------------------------------------------------------
-
-static bool
-parse_bot_command (const char *s, const char *command, const char **following)
-{
- size_t command_len = strlen (command);
- if (strncasecmp (s, command, command_len))
- return false;
- s += command_len;
-
- // Expect a word boundary, so that we don't respond to invalid things
- if (isalnum (*s))
- return false;
-
- // Ignore any initial spaces; the rest is the command's argument
- while (isblank (*s))
- s++;
- *following = s;
- return true;
-}
-
-static void
-split_bot_command_argument_list (const char *arguments, struct str_vector *out)
-{
- split_str_ignore_empty (arguments, ',', out);
- for (size_t i = 0; i < out->len; )
- {
- if (!*strip_str_in_place (out->vector[i], " \t"))
- str_vector_remove (out, i);
- else
- i++;
- }
-}
-
-static bool
-is_private_message (const struct irc_message *msg)
-{
- hard_assert (msg->params.len);
- return !strchr ("#&+!", *msg->params.vector[0]);
-}
-
-static bool
-is_sent_by_admin (struct bot_context *ctx, const struct irc_message *msg)
-{
- // No administrator set -> everyone is an administrator
- if (!ctx->admin_re)
- return true;
- return regexec (ctx->admin_re, msg->prefix, 0, NULL, 0) != REG_NOMATCH;
-}
-
-static void respond_to_user (struct bot_context *ctx, const struct
- irc_message *msg, const char *format, ...) ATTRIBUTE_PRINTF (3, 4);
-
-static void
-respond_to_user (struct bot_context *ctx, const struct irc_message *msg,
- const char *format, ...)
-{
- if (!soft_assert (msg->prefix && msg->params.len))
- return;
-
- char nick[strcspn (msg->prefix, "!") + 1];
- strncpy (nick, msg->prefix, sizeof nick - 1);
- nick[sizeof nick - 1] = '\0';
-
- struct str text;
- va_list ap;
-
- str_init (&text);
- va_start (ap, format);
- str_append_vprintf (&text, format, ap);
- va_end (ap);
-
- if (is_private_message (msg))
- irc_send (ctx, "PRIVMSG %s :%s", nick, text.str);
- else
- irc_send (ctx, "PRIVMSG %s :%s: %s",
- msg->params.vector[0], nick, text.str);
-
- str_free (&text);
-}
-
-static void
-process_plugin_load (struct bot_context *ctx,
- const struct irc_message *msg, const char *name)
-{
- struct error *e = NULL;
- if (plugin_load (ctx, name, &e))
- respond_to_user (ctx, msg, "plugin `%s' queued for loading", name);
- else
- {
- respond_to_user (ctx, msg, "plugin `%s' could not be loaded: %s",
- name, e->message);
- error_free (e);
- }
-}
-
-static void
-process_plugin_unload (struct bot_context *ctx,
- const struct irc_message *msg, const char *name)
-{
- struct error *e = NULL;
- if (plugin_unload (ctx, name, &e))
- respond_to_user (ctx, msg, "plugin `%s' unloaded", name);
- else
- {
- respond_to_user (ctx, msg, "plugin `%s' could not be unloaded: %s",
- name, e->message);
- error_free (e);
- }
-}
-
-static void
-process_plugin_reload (struct bot_context *ctx,
- const struct irc_message *msg, const char *name)
-{
- // So far the only error that can occur is that the plugin hasn't been
- // loaded, which in this case doesn't really matter.
- plugin_unload (ctx, name, NULL);
-
- process_plugin_load (ctx, msg, name);
-}
-
-static void
-process_privmsg (struct bot_context *ctx, const struct irc_message *msg)
-{
- if (!is_sent_by_admin (ctx, msg))
- return;
- if (msg->params.len < 2)
- return;
-
- const char *prefix = str_map_find (&ctx->config, "prefix");
- hard_assert (prefix != NULL); // We have a default value for this
-
- // For us to recognize the command, it has to start with the prefix,
- // with the exception of PM's sent directly to us.
- const char *text = msg->params.vector[1];
- if (!strncmp (text, prefix, strlen (prefix)))
- text += strlen (prefix);
- else if (!is_private_message (msg))
- return;
-
- const char *following;
- struct str_vector list;
- str_vector_init (&list);
-
- if (parse_bot_command (text, "quote", &following))
- // This seems to replace tons of random stupid commands
- irc_send (ctx, "%s", following);
- else if (parse_bot_command (text, "quit", &following))
- {
- // We actually need this command (instead of just `quote') because we
- // could try to reconnect to the server automatically otherwise.
- if (*following)
- irc_send (ctx, "QUIT :%s", following);
- else
- irc_send (ctx, "QUIT");
- initiate_quit (ctx);
- }
- else if (parse_bot_command (text, "status", &following))
- {
- struct str report;
- str_init (&report);
-
- const char *reason = getenv (g_startup_reason_str);
- if (!reason)
- reason = "launched normally";
- str_append_printf (&report, "\x02startup reason:\x0f %s, ", reason);
-
- str_append (&report, "\x02plugins:\x0f ");
- size_t zombies = 0;
- for (struct plugin_data *plugin = ctx->plugins;
- plugin; plugin = plugin->next)
- {
- if (plugin->is_zombie)
- zombies++;
- else
- str_append_printf (&report, "%s, ", plugin->name);
- }
- if (!ctx->plugins)
- str_append (&report, "\x02none\x0f, ");
- str_append_printf (&report, "\x02zombies:\x0f %zu", zombies);
-
- respond_to_user (ctx, msg, "%s", report.str);
- str_free (&report);
- }
- else if (parse_bot_command (text, "load", &following))
- {
- split_bot_command_argument_list (following, &list);
- for (size_t i = 0; i < list.len; i++)
- process_plugin_load (ctx, msg, list.vector[i]);
- }
- else if (parse_bot_command (text, "reload", &following))
- {
- split_bot_command_argument_list (following, &list);
- for (size_t i = 0; i < list.len; i++)
- process_plugin_reload (ctx, msg, list.vector[i]);
- }
- else if (parse_bot_command (text, "unload", &following))
- {
- split_bot_command_argument_list (following, &list);
- for (size_t i = 0; i < list.len; i++)
- process_plugin_unload (ctx, msg, list.vector[i]);
- }
-
- str_vector_free (&list);
-}
-
-static void
-irc_forward_message_to_plugins (struct bot_context *ctx, const char *raw)
-{
- // For consistency with plugin_process_message()
- if (!ctx->irc_ready)
- return;
-
- for (struct plugin_data *plugin = ctx->plugins;
- plugin; plugin = plugin->next)
- {
- if (plugin->is_zombie)
- continue;
-
- if (plugin->initialized)
- plugin_send (plugin, "%s", raw);
- else
- // TODO: make sure that this buffer doesn't get too large either
- str_append_printf (&plugin->queued_output, "%s\r\n", raw);
- }
-}
-
-static void
-irc_process_message (const struct irc_message *msg,
- const char *raw, void *user_data)
-{
- struct bot_context *ctx = user_data;
- if (g_debug_mode)
- fprintf (stderr, "[%s] ==> \"%s\"\n", "IRC", raw);
-
- // This should be as minimal as possible, I don't want to have the whole bot
- // written in C, especially when I have this overengineered plugin system.
- // Therefore the very basic functionality only.
- //
- // I should probably even rip out the autojoin...
-
- irc_forward_message_to_plugins (ctx, raw);
-
- if (!strcasecmp (msg->command, "PING"))
- {
- if (msg->params.len)
- irc_send (ctx, "PONG :%s", msg->params.vector[0]);
- else
- irc_send (ctx, "PONG");
- }
- else if (!ctx->irc_ready && (!strcasecmp (msg->command, "MODE")
- || !strcasecmp (msg->command, "376") // RPL_ENDOFMOTD
- || !strcasecmp (msg->command, "422"))) // ERR_NOMOTD
- {
- print_status ("successfully connected");
- ctx->irc_ready = true;
-
- const char *autojoin = str_map_find (&ctx->config, "autojoin");
- if (autojoin)
- irc_send (ctx, "JOIN :%s", autojoin);
- }
- else if (!strcasecmp (msg->command, "PRIVMSG"))
- process_privmsg (ctx, msg);
-}
-
-enum irc_read_result
-{
- IRC_READ_OK, ///< Some data were read successfully
- IRC_READ_EOF, ///< The server has closed connection
- IRC_READ_AGAIN, ///< No more data at the moment
- IRC_READ_ERROR ///< General connection failure
-};
-
-static enum irc_read_result
-irc_fill_read_buffer_ssl (struct bot_context *ctx, struct str *buf)
-{
- int n_read;
-start:
- n_read = SSL_read (ctx->ssl, buf->str + buf->len,
- buf->alloc - buf->len - 1 /* null byte */);
-
- const char *error_info = NULL;
- switch (xssl_get_error (ctx->ssl, n_read, &error_info))
- {
- case SSL_ERROR_NONE:
- buf->str[buf->len += n_read] = '\0';
- return IRC_READ_OK;
- case SSL_ERROR_ZERO_RETURN:
- return IRC_READ_EOF;
- case SSL_ERROR_WANT_READ:
- return IRC_READ_AGAIN;
- case SSL_ERROR_WANT_WRITE:
- {
- // Let it finish the handshake as we don't poll for writability;
- // any errors are to be collected by SSL_read() in the next iteration
- struct pollfd pfd = { .fd = ctx->irc_fd, .events = POLLOUT };
- soft_assert (poll (&pfd, 1, 0) > 0);
- goto start;
- }
- case XSSL_ERROR_TRY_AGAIN:
- goto start;
- default:
- print_debug ("%s: %s: %s", __func__, "SSL_read", error_info);
- return IRC_READ_ERROR;
- }
-}
-
-static enum irc_read_result
-irc_fill_read_buffer (struct bot_context *ctx, struct str *buf)
-{
- ssize_t n_read;
-start:
- n_read = recv (ctx->irc_fd, buf->str + buf->len,
- buf->alloc - buf->len - 1 /* null byte */, 0);
-
- if (n_read > 0)
- {
- buf->str[buf->len += n_read] = '\0';
- return IRC_READ_OK;
- }
- if (n_read == 0)
- return IRC_READ_EOF;
-
- if (errno == EAGAIN)
- return IRC_READ_AGAIN;
- if (errno == EINTR)
- goto start;
-
- print_debug ("%s: %s: %s", __func__, "recv", strerror (errno));
- return IRC_READ_ERROR;
-}
-
-static bool irc_connect (struct bot_context *ctx, struct error **e);
-
-static void
-irc_try_reconnect (struct bot_context *ctx)
-{
- if (!soft_assert (ctx->irc_fd == -1))
- return;
-
- const char *reconnect_str = str_map_find (&ctx->config, "reconnect");
- hard_assert (reconnect_str != NULL); // We have a default value for this
-
- bool reconnect;
- if (!set_boolean_if_valid (&reconnect, reconnect_str))
- {
- print_fatal ("invalid configuration value for `%s'", "recover");
- try_finish_quit (ctx);
- return;
- }
- if (!reconnect)
- return;
-
- const char *delay_str = str_map_find (&ctx->config, "reconnect_delay");
- hard_assert (delay_str != NULL); // We have a default value for this
-
- unsigned long delay;
- if (!xstrtoul (&delay, delay_str, 10))
- {
- print_error ("invalid configuration value for `%s'",
- "reconnect_delay");
- delay = 0;
- }
-
- while (true)
- {
- // TODO: this would be better suited by a timeout event;
- // remember to update try_finish_quit() etc. to reflect this
- print_status ("trying to reconnect in %ld seconds...", delay);
- sleep (delay);
-
- struct error *e = NULL;
- if (irc_connect (ctx, &e))
- break;
-
- print_error ("%s", e->message);
- error_free (e);
- }
-
- // TODO: inform plugins about the new connection
-}
-
-static void
-on_irc_disconnected (struct bot_context *ctx)
-{
- // Get rid of the dead socket etc.
- if (ctx->ssl)
- {
- SSL_free (ctx->ssl);
- ctx->ssl = NULL;
- SSL_CTX_free (ctx->ssl_ctx);
- ctx->ssl_ctx = NULL;
- }
-
- ssize_t i = poller_find_by_fd (&ctx->poller, ctx->irc_fd);
- if (i != -1)
- poller_remove_at_index (&ctx->poller, i);
-
- xclose (ctx->irc_fd);
- ctx->irc_fd = -1;
- ctx->irc_ready = false;
-
- // TODO: inform plugins about the disconnect event
-
- if (ctx->quitting)
- {
- // Unload all plugins
- // TODO: wait for a few seconds and then send SIGKILL to all plugins
- for (struct plugin_data *plugin = ctx->plugins;
- plugin; plugin = plugin->next)
- plugin_zombify (plugin);
-
- try_finish_quit (ctx);
- return;
- }
-
- irc_try_reconnect (ctx);
-}
-
-static void
-on_irc_readable (const struct pollfd *fd, struct bot_context *ctx)
-{
- if (fd->revents & ~(POLLIN | POLLHUP | POLLERR))
- print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
-
- (void) set_blocking (ctx->irc_fd, false);
-
- struct str *buf = &ctx->read_buffer;
- enum irc_read_result (*fill_buffer)(struct bot_context *, struct str *)
- = ctx->ssl
- ? irc_fill_read_buffer_ssl
- : irc_fill_read_buffer;
- bool disconnected = false;
- while (true)
- {
- str_ensure_space (buf, 512);
- switch (fill_buffer (ctx, buf))
- {
- case IRC_READ_AGAIN:
- goto end;
- case IRC_READ_ERROR:
- print_error ("reading from the IRC server failed");
- disconnected = true;
- goto end;
- case IRC_READ_EOF:
- print_status ("the IRC server closed the connection");
- disconnected = true;
- goto end;
- case IRC_READ_OK:
- break;
- }
-
- if (buf->len >= (1 << 20))
- {
- print_error ("the IRC server seems to spew out data frantically");
- irc_shutdown (ctx);
- goto end;
- }
- }
-end:
- (void) set_blocking (ctx->irc_fd, true);
- irc_process_buffer (buf, irc_process_message, ctx);
-
- if (disconnected)
- on_irc_disconnected (ctx);
-}
-
-static bool
-irc_connect (struct bot_context *ctx, struct error **e)
-{
- const char *irc_host = str_map_find (&ctx->config, "irc_host");
- const char *irc_port = str_map_find (&ctx->config, "irc_port");
- const char *ssl_use_str = str_map_find (&ctx->config, "ssl_use");
-
- const char *nickname = str_map_find (&ctx->config, "nickname");
- const char *username = str_map_find (&ctx->config, "username");
- const char *realname = str_map_find (&ctx->config, "realname");
-
- // We have a default value for these
- hard_assert (irc_port && ssl_use_str);
- hard_assert (nickname && username && realname);
-
- // TODO: again, get rid of `struct error' in here. The question is: how
- // do we tell our caller that he should not try to reconnect?
- if (!irc_host)
- {
- error_set (e, "no hostname specified in configuration");
- return false;
- }
-
- bool use_ssl;
- if (!set_boolean_if_valid (&use_ssl, ssl_use_str))
- {
- error_set (e, "invalid configuration value for `%s'", "use_ssl");
- return false;
- }
-
- if (!irc_establish_connection (ctx, irc_host, irc_port, use_ssl, e))
- return false;
-
- // TODO: set a timeout on the socket, something like 30 minutes, then we
- // should ideally send a PING... or just forcefully reconnect.
- //
- // TODO: in exec try: 1/ set blocking, 2/ setsockopt() SO_LINGER,
- // (struct linger) { .l_onoff = true; .l_linger = 1 /* 1s should do */; }
- // 3/ /* O_CLOEXEC */ But only if the QUIT message proves unreliable.
- poller_set (&ctx->poller, ctx->irc_fd, POLLIN,
- (poller_dispatcher_func) on_irc_readable, ctx);
-
- // TODO: probably check for errors from these calls as well
- irc_send (ctx, "NICK %s", nickname);
- irc_send (ctx, "USER %s 8 * :%s", username, realname);
- return true;
-}
-
-static bool
-load_admin_regex (struct bot_context *ctx)
-{
- hard_assert (!ctx->admin_re);
- const char *admin = str_map_find (&ctx->config, "admin");
-
- if (!admin)
- return true;
-
- struct error *e = NULL;
- ctx->admin_re = regex_compile (admin, REG_EXTENDED | REG_NOSUB, &e);
- if (!e)
- return true;
-
- print_error ("invalid configuration value for `%s': %s",
- "admin", e->message);
- error_free (e);
- return false;
-}
-
-static void
-on_signal_pipe_readable (const struct pollfd *fd, struct bot_context *ctx)
-{
- char *dummy;
- (void) read (fd->fd, &dummy, 1);
-
- // XXX: do we need to check if we have a connection?
- if (g_termination_requested && !ctx->quitting)
- {
- irc_send (ctx, "QUIT :Terminated by signal");
- initiate_quit (ctx);
- }
-
- // Reap all dead children (since the pipe may overflow, we ask waitpid()
- // to return all the zombies it knows about).
- while (true)
- {
- int status;
- pid_t zombie = waitpid (-1, &status, WNOHANG);
-
- if (zombie == -1)
- {
- // No children to wait on
- if (errno == ECHILD)
- break;
-
- hard_assert (errno == EINTR);
- continue;
- }
-
- if (zombie == 0)
- break;
-
- struct plugin_data *plugin = plugin_find_by_pid (ctx, zombie);
- // Something has died but we don't recognize it (re-exec?)
- if (!soft_assert (plugin != NULL))
- continue;
-
- // TODO: callbacks on children death, so that we may tell the user
- // "plugin `name' died like a dirty jewish pig"; use `status'
- if (!plugin->is_zombie && WIFSIGNALED (status))
- {
- const char *notes = "";
-#ifdef WCOREDUMP
- if (WCOREDUMP (status))
- notes = " (core dumped)";
-#endif
- print_warning ("Plugin `%s' died from signal %d%s",
- plugin->name, WTERMSIG (status), notes);
- }
-
- // Let's go through the zombie state to simplify things a bit
- // TODO: might not be a completely bad idea to restart the plugin
- plugin_zombify (plugin);
-
- plugin->pid = -1;
-
- ssize_t poller_idx = poller_find_by_fd (&ctx->poller, plugin->read_fd);
- if (poller_idx != -1)
- poller_remove_at_index (&ctx->poller, poller_idx);
-
- xclose (plugin->read_fd);
- plugin->read_fd = -1;
-
- LIST_UNLINK (ctx->plugins, plugin);
- plugin_data_free (plugin);
- free (plugin);
-
- // Living child processes block us from quitting
- try_finish_quit (ctx);
- }
-}
-
-static void
-print_usage (const char *program_name)
-{
- fprintf (stderr,
- "Usage: %s [OPTION]...\n"
- "Experimental IRC bot.\n"
- "\n"
- " -d, --debug run in debug mode\n"
- " -h, --help display this help and exit\n"
- " -V, --version output version information and exit\n"
- " --write-default-cfg [filename]\n"
- " write a default configuration file and exit\n",
- program_name);
-}
-
-int
-main (int argc, char *argv[])
-{
- const char *invocation_name = argv[0];
- str_vector_init (&g_original_argv);
- str_vector_add_vector (&g_original_argv, argv);
-
- static struct option opts[] =
- {
- { "debug", no_argument, NULL, 'd' },
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, 'V' },
- { "write-default-cfg", optional_argument, NULL, 'w' },
- { NULL, 0, NULL, 0 }
- };
-
- while (1)
- {
- int c, opt_index;
-
- c = getopt_long (argc, argv, "dhV", opts, &opt_index);
- if (c == -1)
- break;
-
- switch (c)
- {
- case 'd':
- g_debug_mode = true;
- break;
- case 'h':
- print_usage (invocation_name);
- exit (EXIT_SUCCESS);
- case 'V':
- printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
- exit (EXIT_SUCCESS);
- case 'w':
- call_write_default_config (optarg, g_config_table);
- exit (EXIT_SUCCESS);
- default:
- print_error ("wrong options");
- exit (EXIT_FAILURE);
- }
- }
-
- print_status (PROGRAM_NAME " " PROGRAM_VERSION " starting");
- setup_signal_handlers ();
-
- SSL_library_init ();
- atexit (EVP_cleanup);
- SSL_load_error_strings ();
- // XXX: ERR_load_BIO_strings()? Anything else?
- atexit (ERR_free_strings);
-
- struct bot_context ctx;
- bot_context_init (&ctx);
-
- struct error *e = NULL;
- if (!read_config_file (&ctx.config, &e))
- {
- print_error ("error loading configuration: %s", e->message);
- error_free (e);
- exit (EXIT_FAILURE);
- }
-
- setup_recovery_handler (&ctx);
- poller_set (&ctx.poller, g_signal_pipe[0], POLLIN,
- (poller_dispatcher_func) on_signal_pipe_readable, &ctx);
-
- plugin_load_all_from_config (&ctx);
- if (!load_admin_regex (&ctx))
- exit (EXIT_FAILURE);
- if (!irc_connect (&ctx, &e))
- {
- print_error ("%s", e->message);
- error_free (e);
- exit (EXIT_FAILURE);
- }
-
- // TODO: clean re-exec support; to save the state I can either use argv,
- // argp, or I can create a temporary file, unlink it and use the FD
- // (mkstemp() on a `struct str' constructed from XDG_RUNTIME_DIR, TMPDIR
- // or /tmp as a last resort + PROGRAM_NAME + ".XXXXXX" -> unlink();
- // remember to use O_CREAT | O_EXCL). The state needs to be versioned.
- // Unfortunately I cannot de/serialize SSL state.
-
- ctx.polling = true;
- while (ctx.polling)
- poller_run (&ctx.poller);
-
- bot_context_free (&ctx);
- str_vector_free (&g_original_argv);
- return EXIT_SUCCESS;
-}
-