Author: ae
Date: Mon Jul 20 06:58:32 2015
New Revision: 285711
URL: https://svnweb.freebsd.org/changeset/base/285711
Log:
Add LLE event handler to report ND6 events to userland via rtsock.
Obtained from: Yandex LLC
MFC after: 2 weeks
Sponsored by: Yandex LLC
Modified:
head/sys/netinet6/nd6.c
Modified: head/sys/netinet6/nd6.c
==============================================================================
--- head/sys/netinet6/nd6.c Mon Jul 20 06:54:50 2015 (r285710)
+++ head/sys/netinet6/nd6.c Mon Jul 20 06:58:32 2015 (r285711)
@@ -112,6 +112,8 @@ VNET_DEFINE(int, nd6_debug) = 1;
VNET_DEFINE(int, nd6_debug) = 0;
#endif
+static eventhandler_tag lle_event_eh;
+
/* for debugging? */
#if 0
static int nd6_inuse, nd6_allocated;
@@ -144,6 +146,58 @@ static VNET_DEFINE(struct callout, nd6_s
VNET_DEFINE(struct callout, nd6_timer_ch);
+static void
+nd6_lle_event(void *arg __unused, struct llentry *lle, int evt)
+{
+ struct rt_addrinfo rtinfo;
+ struct sockaddr_in6 dst, *sa6;
+ struct sockaddr_dl gw;
+ struct ifnet *ifp;
+ int type;
+
+ LLE_WLOCK_ASSERT(lle);
+
+ switch (evt) {
+ case LLENTRY_RESOLVED:
+ type = RTM_ADD;
+ KASSERT(lle->la_flags & LLE_VALID,
+ ("%s: %p resolved but not valid?", __func__, lle));
+ break;
+ case LLENTRY_EXPIRED:
+ type = RTM_DELETE;
+ break;
+ default:
+ return;
+ }
+
+ sa6 = L3_ADDR_SIN6(lle);
+ if (sa6->sin6_family != AF_INET6)
+ return;
+ ifp = lle->lle_tbl->llt_ifp;
+
+ bzero(&dst, sizeof(dst));
+ bzero(&gw, sizeof(gw));
+ bzero(&rtinfo, sizeof(rtinfo));
+ dst.sin6_len = sizeof(struct sockaddr_in6);
+ dst.sin6_family = AF_INET6;
+ dst.sin6_addr = sa6->sin6_addr;
+ dst.sin6_scope_id = in6_getscopezone(ifp,
+ in6_addrscope(&sa6->sin6_addr));
+ in6_clearscope(&dst.sin6_addr); /* XXX */
+ gw.sdl_len = sizeof(struct sockaddr_dl);
+ gw.sdl_family = AF_LINK;
+ gw.sdl_alen = ifp->if_addrlen;
+ gw.sdl_index = ifp->if_index;
+ gw.sdl_type = ifp->if_type;
+ if (evt == LLENTRY_RESOLVED)
+ bcopy(&lle->ll_addr, gw.sdl_data, ifp->if_addrlen);
+ rtinfo.rti_info[RTAX_DST] = (struct sockaddr *)&dst;
+ rtinfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gw;
+ rtinfo.rti_addrs = RTA_DST | RTA_GATEWAY;
+ rt_missmsg_fib(type, &rtinfo, RTF_HOST | RTF_LLDATA | (
+ type == RTM_ADD ? RTF_UP: 0), 0, RT_DEFAULT_FIB);
+}
+
void
nd6_init(void)
{
@@ -159,6 +213,9 @@ nd6_init(void)
nd6_slowtimo, curvnet);
nd6_dad_init();
+ if (IS_DEFAULT_VNET(curvnet))
+ lle_event_eh = EVENTHANDLER_REGISTER(lle_event, nd6_lle_event,
+ NULL, EVENTHANDLER_PRI_ANY);
}
#ifdef VIMAGE
@@ -168,6 +225,8 @@ nd6_destroy()
callout_drain(&V_nd6_slowtimo_ch);
callout_drain(&V_nd6_timer_ch);
+ if (IS_DEFAULT_VNET(curvnet))
+ EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);
}
#endif
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