From d25377599ce8d8ef019a7ae5467aadb7e8a2dbf8 Mon Sep 17 00:00:00 2001
From: Přemysl Janouch <p.janouch@gmail.com>
Date: Sat, 13 Jun 2015 23:41:54 +0200
Subject: kike: fix quitting + code shuffling

---
 kike.c | 70 +++++++++++++++++++++++++++++++-----------------------------------
 1 file changed, 33 insertions(+), 37 deletions(-)

diff --git a/kike.c b/kike.c
index 602f654..9d3878b 100644
--- a/kike.c
+++ b/kike.c
@@ -388,7 +388,8 @@ client_free (struct client *self)
 	str_map_free (&self->invites);
 }
 
-static void client_close_link (struct client *, const char *);
+static void client_close_link (struct client *c, const char *reason);
+static void client_kill (struct client *c, const char *reason);
 static void client_send (struct client *, const char *, ...)
 	ATTRIBUTE_PRINTF (2, 3);
 static void client_cancel_timers (struct client *);
@@ -623,8 +624,13 @@ static void
 on_irc_quit_timeout (void *user_data)
 {
 	struct server_context *ctx = user_data;
-	// Clients are closed in server_context_free()
-	ctx->polling = false;
+	struct client *iter, *next;
+	for (iter = ctx->clients; iter; iter = next)
+	{
+		next = iter->next;
+		// irc_initiate_quit() has already unregistered the client
+		client_kill (iter, "Shutting down");
+	}
 }
 
 static void
@@ -676,19 +682,9 @@ server_context_free (struct server_context *self)
 	free (self->listen_fds);
 	free (self->listen_events);
 
+	hard_assert (!self->clients);
 	if (self->ssl_ctx)
 		SSL_CTX_free (self->ssl_ctx);
-	struct client *link, *tmp;
-	for (link = self->clients; link; link = tmp)
-	{
-		tmp = link->next;
-		// FIXME: either make sure this isn't called (which it can as of now,
-		//   see on_irc_quit_timeout) or fix client_free() to unregister from
-		//   the poller before closing the socket (we could also just
-		//   set .closed = true).
-		client_free (link);
-		free (link);
-	}
 
 	free (self->server_name);
 	str_map_free (&self->users);
@@ -729,10 +725,6 @@ 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++)
 	{
 		xclose (ctx->listen_fds[i]);
@@ -741,6 +733,10 @@ irc_initiate_quit (struct server_context *ctx)
 	}
 	ctx->n_listen_fds = 0;
 
+	for (struct client *iter = ctx->clients; iter; iter = iter->next)
+		if (!iter->closing_link)
+			client_close_link (iter, "Shutting down");
+
 	ctx->quitting = true;
 	poller_timer_set (&ctx->quit_timer, 5000);
 	irc_try_finish_quit (ctx);
@@ -888,6 +884,25 @@ client_unregister (struct client *c, const char *reason)
 	c->registered = false;
 }
 
+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->nickname : "*",
+		c->hostname /* TODO host IP? */, reason);
+	c->closing_link = true;
+
+	client_unregister (c, reason);
+	client_set_kill_timer (c);
+}
+
 static void
 client_kill (struct client *c, const char *reason)
 {
@@ -917,25 +932,6 @@ client_kill (struct client *c, const char *reason)
 	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->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)
 {
-- 
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