From: Guus Sliepen <guus@tinc-vpn.org>
Date: Thu, 17 May 2007 23:33:07 +0000 (+0000)
Subject: Use libevent to handle key expiration.
X-Git-Tag: import-tinc-1.1~654
X-Git-Url: http://git.meshlink.io/?a=commitdiff_plain;h=563577a1479549fa0c20dcda45831a0fff8c7513;p=meshlink

Use libevent to handle key expiration.
---

diff --git a/src/net.c b/src/net.c
index 57ac8242..405114fb 100644
--- a/src/net.c
+++ b/src/net.c
@@ -400,6 +400,17 @@ static void sigalrm_handler(int signal, short events, void *data) {
 	}
 }
 
+static void keyexpire_handler(int fd, short events, void *event) {
+	ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
+
+	RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+	if(myself->cipher)
+			EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len);
+	send_key_changed(broadcast, myself);
+
+	event_add(event, &(struct timeval){keylifetime, 0});
+}
+
 /*
   this is where it all happens...
 */
@@ -417,6 +428,7 @@ int main_loop(void)
 	struct event sigusr2_event;
 	struct event sigwinch_event;
 	struct event sigalrm_event;
+	struct event keyexpire_event;
 
 	cp();
 
@@ -436,6 +448,8 @@ int main_loop(void)
 	signal_add(&sigwinch_event, NULL);
 	signal_set(&sigalrm_event, SIGALRM, sigalrm_handler, NULL);
 	signal_add(&sigalrm_event, NULL);
+	timeout_set(&keyexpire_event, keyexpire_handler, &keyexpire_event);
+	event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
 
 	last_ping_check = now;
 	
@@ -480,18 +494,6 @@ int main_loop(void)
 		if(last_ping_check + pingtimeout < now) {
 			check_dead_connections();
 			last_ping_check = now;
-
-			/* Should we regenerate our key? */
-
-			if(keyexpires < now) {
-				ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
-
-				RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
-				if(myself->cipher)
-					EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len);
-				send_key_changed(broadcast, myself);
-				keyexpires = now + keylifetime;
-			}
 		}
 	}
 
@@ -503,6 +505,7 @@ int main_loop(void)
 	signal_del(&sigusr2_event);
 	signal_del(&sigwinch_event);
 	signal_del(&sigalrm_event);
+	event_del(&keyexpire_event);
 
 	return 0;
 }