add interface for allowing consumers to register for ARP updates,
redirects, and path MTU changes Reviewed by: silby
This commit is contained in:
parent
284333d353
commit
8e7e854cd6
@ -318,7 +318,7 @@ rtredirect(struct sockaddr *dst,
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int flags,
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struct sockaddr *src)
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{
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struct rtentry *rt;
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struct rtentry *rt, *rt0 = NULL;
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int error = 0;
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short *stat = NULL;
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struct rt_addrinfo info;
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@ -362,8 +362,9 @@ rtredirect(struct sockaddr *dst,
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* Create new route, rather than smashing route to net.
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*/
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create:
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if (rt)
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rtfree(rt);
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rt0 = rt;
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rt = NULL;
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flags |= RTF_GATEWAY | RTF_DYNAMIC;
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bzero((caddr_t)&info, sizeof(info));
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info.rti_info[RTAX_DST] = dst;
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@ -371,14 +372,19 @@ rtredirect(struct sockaddr *dst,
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info.rti_info[RTAX_NETMASK] = netmask;
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info.rti_ifa = ifa;
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info.rti_flags = flags;
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rt = NULL;
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error = rtrequest1(RTM_ADD, &info, &rt);
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if (rt != NULL) {
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RT_LOCK(rt);
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EVENTHANDLER_INVOKE(route_event, RTEVENT_REDIRECT_UPDATE, rt0, rt, dst);
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flags = rt->rt_flags;
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}
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if (rt0)
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RTFREE_LOCKED(rt0);
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stat = &rtstat.rts_dynamic;
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} else {
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struct rtentry *gwrt;
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/*
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* Smash the current notion of the gateway to
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* this destination. Should check about netmask!!!
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@ -390,6 +396,9 @@ rtredirect(struct sockaddr *dst,
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* add the key and gateway (in one malloc'd chunk).
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*/
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rt_setgate(rt, rt_key(rt), gateway);
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gwrt = rtalloc1(gateway, 1, 0);
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EVENTHANDLER_INVOKE(route_event, RTEVENT_REDIRECT_UPDATE, rt, gwrt, dst);
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RTFREE_LOCKED(gwrt);
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}
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} else
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error = EHOSTUNREACH;
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@ -359,6 +359,13 @@ int rtrequest(int, struct sockaddr *,
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struct sockaddr *, struct sockaddr *, int, struct rtentry **);
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int rtrequest1(int, struct rt_addrinfo *, struct rtentry **);
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int rt_check(struct rtentry **, struct rtentry **, struct sockaddr *);
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#include <sys/eventhandler.h>
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#define RTEVENT_ARP_UPDATE 1
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#define RTEVENT_PMTU_UPDATE 2
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#define RTEVENT_REDIRECT_UPDATE 3
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typedef void (*rtevent_fn)(void *, int, struct rtentry *, struct rtentry *, struct sockaddr *);
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EVENTHANDLER_DECLARE(route_event, rtevent_fn);
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#endif
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#endif
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@ -578,7 +578,10 @@ in_arpinput(struct mbuf *m)
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#ifdef DEV_CARP
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int carp_match = 0;
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#endif
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struct sockaddr_in sin;
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sin.sin_len = sizeof(struct sockaddr_in);
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sin.sin_family = AF_INET;
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if (ifp->if_bridge)
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bridged = 1;
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@ -772,6 +775,10 @@ in_arpinput(struct mbuf *m)
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la->la_preempt = arp_maxtries;
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hold = la->la_hold;
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la->la_hold = NULL;
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sin.sin_addr.s_addr = ntohl(itaddr.s_addr);
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EVENTHANDLER_INVOKE(route_event, RTEVENT_ARP_UPDATE, rt, NULL,
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(struct sockaddr *)&sin);
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RT_UNLOCK(rt);
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if (hold != NULL)
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(*ifp->if_output)(ifp, hold, rt_key(rt), rt);
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