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Add LLE event handler to report ND6 events to userland via rtsock.

Browse Source 
Obtained from:	Yandex LLC
MFC after:	2 weeks
Sponsored by:	Yandex LLC
This commit is contained in:
Andrey V. Elsukov 2015-07-20 06:58:32 +00:00
parent 585753c432
commit 30aee13117
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=285711
1 changed files with 59 additions and 0 deletions
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59
sys/netinet6/nd6.c
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@ -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_slowtimo_ch);
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