From: Steven Barth <steven@midlink.org>
Date: Mon, 20 May 2013 14:27:23 +0000 (+0200)
Subject: Fix IA expiring logic
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=feec1ad5767b977ce47e6738930c99c22ba0ce9c;p=project%2Fodhcp6c.git

Fix IA expiring logic
---

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index d2cd656..9b4247c 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -667,13 +667,15 @@ static int dhcpv6_handle_reply(enum dhcpv6_msg orig,
 	uint8_t *odata;
 	uint16_t otype, olen;
 
-	static time_t last_update = 0;
-	time_t now = odhcp6c_get_milli_time() / 1000;
-
-	uint32_t elapsed = now - last_update;
 	odhcp6c_expire();
 
 	if (orig == DHCPV6_MSG_UNKNOWN) {
+		static time_t last_update = 0;
+		time_t now = odhcp6c_get_milli_time() / 1000;
+
+		uint32_t elapsed = (last_update > 0) ? now - last_update : 0;
+		last_update = now;
+
 		t1 -= elapsed;
 		t2 -= elapsed;
 		t3 -= elapsed;
diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index 274a97a..d70546b 100644
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -470,7 +470,7 @@ void odhcp6c_expire(void)
 	static time_t last_update = 0;
 	time_t now = odhcp6c_get_milli_time() / 1000;
 
-	uint32_t elapsed = now - last_update;
+	uint32_t elapsed = (last_update > 0) ? now - last_update : 0;
 	last_update = now;
 
 	odhcp6c_expire_list(STATE_RA_PREFIX, elapsed);