void
in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp)
{
struct in6pcb *in6p, *nin6p;
struct ip6_moptions *im6o;
struct in6_multi_mship *imm, *nimm;
for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
in6p != (void *)&table->inpt_queue;
in6p = nin6p) {
nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
if (in6p->in6p_af != AF_INET6)
continue;
im6o = in6p->in6p_moptions;
if (im6o) {
/*
* Unselect the outgoing interface if it is being
* detached.
*/
if (im6o->im6o_multicast_ifp == ifp)
im6o->im6o_multicast_ifp = NULL;
/*
* Drop multicast group membership if we joined
* through the interface being detached.
* XXX controversial - is it really legal for kernel
* to force this?
*/
for (imm = im6o->im6o_memberships.lh_first;
imm != NULL; imm = nimm) {
nimm = imm->i6mm_chain.le_next;
if (imm->i6mm_maddr->in6m_ifp == ifp) {
LIST_REMOVE(imm, i6mm_chain);
in6_leavegroup(imm);
}
}
}
}
}
/*
* NOTE: in6_ifdetach() does not support loopback if at this moment.
* We don't need this function in bsdi, because interfaces are never removed
* from the ifnet list in bsdi.
*/
void
in6_ifdetach(struct ifnet *ifp)
{
struct in6_ifaddr *ia, *oia;
struct ifaddr *ifa, *next;
struct rtentry *rt;
short rtflags;
struct in6_multi_mship *imm;
/* remove ip6_mrouter stuff */
ip6_mrouter_detach(ifp);
/* remove neighbor management table */
nd6_purge(ifp);
/* XXX this code is duplicated in in6_purgeif() --dyoung */
/* nuke any of IPv6 addresses we have */
if_purgeaddrs(ifp, AF_INET6, in6_purgeaddr);
/* XXX isn't this code is redundant, given the above? --dyoung */
/* XXX doesn't this code replicate code in in6_purgeaddr() ? --dyoung */
/* undo everything done by in6_ifattach(), just in case */
for (ifa = IFADDR_FIRST(ifp); ifa != NULL; ifa = next) {
next = IFADDR_NEXT(ifa);
if (ifa->ifa_addr->sa_family != AF_INET6
|| !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
continue;
}
ia = (struct in6_ifaddr *)ifa;
/*
* leave from multicast groups we have joined for the interface
*/
while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
LIST_REMOVE(imm, i6mm_chain);
in6_leavegroup(imm);
}
/* remove from the routing table */
if ((ia->ia_flags & IFA_ROUTE) &&
(rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0))) {
rtflags = rt->rt_flags;
rtfree(rt);
rtrequest(RTM_DELETE, (struct sockaddr *)&ia->ia_addr,
(struct sockaddr *)&ia->ia_addr,
(struct sockaddr *)&ia->ia_prefixmask,
rtflags, NULL);
}
/* remove from the linked list */
ifa_remove(ifp, &ia->ia_ifa);
/* also remove from the IPv6 address chain(itojun&jinmei) */
oia = ia;
if (oia == (ia = in6_ifaddr))
in6_ifaddr = ia->ia_next;
else {
while (ia->ia_next && (ia->ia_next != oia))
ia = ia->ia_next;
if (ia->ia_next)
ia->ia_next = oia->ia_next;
else {
nd6log((LOG_ERR,
"%s: didn't unlink in6ifaddr from list\n",
if_name(ifp)));
}
}
ifafree(&oia->ia_ifa);
}
/* cleanup multicast address kludge table, if there is any */
in6_purgemkludge(ifp);
/*
* remove neighbor management table. we call it twice just to make
* sure we nuke everything. maybe we need just one call.
* XXX: since the first call did not release addresses, some prefixes
* might remain. We should call nd6_purge() again to release the
* prefixes after removing all addresses above.
* (Or can we just delay calling nd6_purge until at this point?)
*/
nd6_purge(ifp);
}
