From: Roy Marples <roy@marples.name>
Date: Wed, 14 Nov 2012 10:30:50 +0000 (+0000)
Subject: Expire RDNSS and DNSSL options if the RA expires.
X-Git-Tag: v5.6.3~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27ac6d558ade98bc0ef7a14b15ac35ed83d83d95;p=thirdparty%2Fdhcpcd.git

Expire RDNSS and DNSSL options if the RA expires.
---

diff --git a/ipv6rs.c b/ipv6rs.c
index 7449de7e..0972ffde 100644
--- a/ipv6rs.c
+++ b/ipv6rs.c
@@ -937,6 +937,21 @@ ipv6rs_expire(void *arg)
 		}
 	
 		TAILQ_FOREACH_SAFE(rao, &rap->options, next, raon) {
+			if (rap->expired) {
+				switch(rao->type) {
+				case ND_OPT_RDNSS: /* FALLTHROUGH */
+				case ND_OPT_DNSSL:
+					/* RFC6018 end of section 5.2 states
+					 * that if tha RA has a lifetime of 0
+					 * then we should expire these
+					 * options */
+					TAILQ_REMOVE(&rap->options, rao, next);
+					expired = 1;
+					free(rao->option);
+					free(rao);
+					continue;
+				}
+			}
 			if (!timerisset(&rao->expire))
 				continue;
 			if (timercmp(&now, &rao->expire, >)) {