From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Thu, 13 Nov 2014 01:17:24 +0100
Subject: odhcp6c: always accept RDNSS, independently of the default router lifetime

diff --git a/package/network/ipv6/odhcp6c/patches/001-always_accept_rdnss.patch b/package/network/ipv6/odhcp6c/patches/001-always_accept_rdnss.patch
new file mode 100644
index 0000000..b9a9a83
--- /dev/null
+++ b/package/network/ipv6/odhcp6c/patches/001-always_accept_rdnss.patch
@@ -0,0 +1,22 @@
+--- a/src/ra.c
++++ b/src/ra.c
+@@ -442,19 +442,6 @@ bool ra_process(void)
+ 				}
+ 			}
+ 		}
+-
+-		int states[2] = {STATE_RA_DNS, STATE_RA_SEARCH};
+-		for (size_t i = 0; i < 2; ++i) {
+-			size_t ra_dns_len;
+-			uint8_t *start = odhcp6c_get_state(states[i], &ra_dns_len);
+-			for (struct odhcp6c_entry *c = (struct odhcp6c_entry*)start;
+-						(uint8_t*)c < &start[ra_dns_len] &&
+-						(uint8_t*)odhcp6c_next_entry(c) <= &start[ra_dns_len];
+-						c = odhcp6c_next_entry(c))
+-				if (IN6_ARE_ADDR_EQUAL(&c->router, &from.sin6_addr) &&
+-						c->valid > router_valid)
+-					c->valid = router_valid;
+-		}
+ 	}
+ 
+ 	if (found)