From 479da40a3da187cb659a436274d263583489dadd Mon Sep 17 00:00:00 2001
From: Přemysl Janouch <p.janouch@gmail.com>
Date: Sun, 10 Aug 2014 04:58:24 +0200
Subject: ZyklonB: add connection timeouts

---
 zyklonb.c | 39 +++++++++++++++++++++++++++++++++------
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/zyklonb.c b/zyklonb.c
index c99b141..d17bf7c 100644
--- a/zyklonb.c
+++ b/zyklonb.c
@@ -204,8 +204,6 @@ try_finish_quit (struct bot_context *ctx)
 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, ...)
 {
@@ -1469,6 +1467,36 @@ on_irc_disconnected (struct bot_context *ctx)
 	irc_try_reconnect (ctx);
 }
 
+static void
+on_irc_ping_timeout (void *user_data)
+{
+	struct bot_context *ctx = user_data;
+	print_error ("connection timeout");
+	on_irc_disconnected (ctx);
+}
+
+static void
+on_irc_timeout (void *user_data)
+{
+	// Provoke a response from the server
+	struct bot_context *ctx = user_data;
+	irc_send (ctx, "PING :%s", str_map_find (&ctx->config, "nickname"));
+}
+
+static void
+irc_reset_timeouts (struct bot_context *ctx)
+{
+	ssize_t i;
+	struct poller_timers *timers = &ctx->poller.timers;
+	while ((i = poller_timers_find_by_data (timers, ctx)) != -1)
+		poller_timers_remove_at_index (timers, i);
+
+	poller_timers_add (&ctx->poller.timers,
+		on_irc_timeout, ctx, 3 * 60 * 1000);
+	poller_timers_add (&ctx->poller.timers,
+		on_irc_ping_timeout, ctx, (3 * 60 + 30) * 1000);
+}
+
 static void
 on_irc_readable (const struct pollfd *fd, struct bot_context *ctx)
 {
@@ -1515,6 +1543,8 @@ end:
 
 	if (disconnected)
 		on_irc_disconnected (ctx);
+	else
+		irc_reset_timeouts (ctx);
 }
 
 static bool
@@ -1550,16 +1580,13 @@ irc_connect (struct bot_context *ctx, struct error **e)
 	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);
+	irc_reset_timeouts (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;
-- 
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