diff options
Diffstat (limited to 'sys/netinet6/nd6_rtr.c')
| -rw-r--r-- | sys/netinet6/nd6_rtr.c | 40 |
1 files changed, 18 insertions, 22 deletions
diff --git a/sys/netinet6/nd6_rtr.c b/sys/netinet6/nd6_rtr.c index 19ec989..e791e2e 100644 --- a/sys/netinet6/nd6_rtr.c +++ b/sys/netinet6/nd6_rtr.c @@ -127,8 +127,11 @@ nd6_rs_input(struct mbuf *m, int off, int icmp6len) union nd_opts ndopts; char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; - /* If I'm not a router, ignore it. */ - if (!V_ip6_forwarding) + /* + * Accept RS only when V_ip6_forwarding=1 and the interface has + * no ND6_IFF_ACCEPT_RTADV. + */ + if (!V_ip6_forwarding || ND_IFINFO(ifp)->flags & ND6_IFF_ACCEPT_RTADV) goto freeit; /* Sanity checks */ @@ -213,11 +216,10 @@ nd6_ra_input(struct mbuf *m, int off, int icmp6len) char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; /* - * We only accept RAs only when - * the node is not a router and - * per-interface variable allows RAs on the receiving interface. + * We only accept RAs only when the per-interface flag + * ND6_IFF_ACCEPT_RTADV is on the receiving interface. */ - if (V_ip6_forwarding || !(ndi->flags & ND6_IFF_ACCEPT_RTADV)) + if (!(ndi->flags & ND6_IFF_ACCEPT_RTADV)) goto freeit; if (ip6->ip6_hlim != 255) { @@ -266,7 +268,15 @@ nd6_ra_input(struct mbuf *m, int off, int icmp6len) bzero(&dr0, sizeof(dr0)); dr0.rtaddr = saddr6; dr0.flags = nd_ra->nd_ra_flags_reserved; - dr0.rtlifetime = ntohs(nd_ra->nd_ra_router_lifetime); + /* + * Effectively-disable the route in the RA packet + * when ND6_IFF_NO_RADR on the receiving interface or + * ip6.forwarding=1. + */ + if (ndi->flags & ND6_IFF_NO_RADR || V_ip6_forwarding) + dr0.rtlifetime = 0; + else + dr0.rtlifetime = ntohs(nd_ra->nd_ra_router_lifetime); dr0.expire = time_second + dr0.rtlifetime; dr0.ifp = ifp; /* unspecified or not? (RFC 2461 6.3.4) */ @@ -557,7 +567,7 @@ defrtrlist_del(struct nd_defrouter *dr) * Flush all the routing table entries that use the router * as a next hop. */ - if (!V_ip6_forwarding) + if (ND_IFINFO(dr->ifp)->flags & ND6_IFF_ACCEPT_RTADV) rt6_flush(&dr->rtaddr, dr->ifp); if (dr->installed) { @@ -616,20 +626,6 @@ defrouter_select(void) struct llentry *ln = NULL; /* - * This function should be called only when acting as an autoconfigured - * host. Although the remaining part of this function is not effective - * if the node is not an autoconfigured host, we explicitly exclude - * such cases here for safety. - */ - if (V_ip6_forwarding) { - nd6log((LOG_WARNING, - "defrouter_select: called unexpectedly (forwarding=%d)\n", - V_ip6_forwarding)); - splx(s); - return; - } - - /* * Let's handle easy case (3) first: * If default router list is empty, there's nothing to be done. */ |
