Revert "Router Advertisement/Solicitation sanity check"

This reverts commit 3f417e55d5208df5b91aa9b101657bbc7a461614.

diff --git a/src/router.c b/src/router.c
index fffdc4c24ba3401c41e877a968efb7c092927373..5f3921d2164b0e91b0e5a081f1b0ec6177a13328 100644 (file)
--- a/src/router.c
+++ b/src/router.c
@@ -130,66 +130,12 @@ static void sigusr1_refresh(_unused int signal)
                        uloop_timeout_set(&iface->timer_rs, 1000);
 }
 
-static int router_icmpv6_valid(struct sockaddr_in6 *source, uint8_t *data, size_t len)
-{
-       struct icmp6_hdr *hdr = (struct icmp6_hdr *)data;
-       struct icmpv6_opt *opt;
-       size_t optlen = len - sizeof(*hdr);
-
-       /* Hoplimit is already checked in odhcpd_receive_packets */
-       if (len < sizeof(*hdr))
-               return 0;
-
-       if (hdr->icmp6_code)
-               return 0;
-
-       switch (hdr->icmp6_type) {
-       case ND_ROUTER_ADVERT:
-               if (!IN6_IS_ADDR_LINKLOCAL(&source->sin6_addr))
-                       return 0;
-
-               opt = (struct icmpv6_opt *)((struct nd_router_advert *)data + 1);
-               break;
-
-       case ND_ROUTER_SOLICIT:
-               opt = (struct icmpv6_opt *)((struct nd_router_solicit *)data + 1);
-               break;
-
-       default:
-               return 0;
-       }
-
-       while (optlen > 0) {
-               size_t l = opt->len << 3;
-
-               if (optlen < sizeof(*opt))
-                       return 0;
-
-               if (l > optlen || l == 0)
-                       return 0;
-
-               if (opt->type == ND_OPT_SOURCE_LINKADDR && IN6_IS_ADDR_UNSPECIFIED(&source->sin6_addr) &&
-                       hdr->icmp6_type == ND_ROUTER_SOLICIT) {
-                       return 0;
-               }
-
-               opt = (struct icmpv6_opt *)(((uint8_t *)opt) + l);
-
-               optlen -= l;
-       }
-
-       return 1;
-}
 
 // Event handler for incoming ICMPv6 packets
-static void handle_icmpv6(void *addr, void *data, size_t len,
+static void handle_icmpv6(_unused void *addr, void *data, size_t len,
                struct interface *iface)
 {
        struct icmp6_hdr *hdr = data;
-       
-       if (!router_icmpv6_valid(addr, data, len))
-               return;
-
        if ((iface->ra == RELAYD_SERVER && !iface->master)) { // Server mode
                if (hdr->icmp6_type == ND_ROUTER_SOLICIT)
                        send_router_advert(&iface->timer_rs);