/*
* remove a multicast address from an interface, called with c->car locked
*/
void
ipifcremmulti(Conv *c, uint8_t *ma, uint8_t *ia)
{
Proc *up = externup();
Ipmulti *multi, **l;
Iplifc *lifc;
Conv **p;
Ipifc *ifc;
Fs *f;
f = c->p->f;
for(l = &c->multi; *l; l = &(*l)->next)
if(ipcmp(ma, (*l)->ma) == 0 && ipcmp(ia, (*l)->ia) == 0)
break;
multi = *l;
if(multi == nil)
return; /* we don't have it open */
*l = multi->next;
for(p = f->ipifc->conv; *p; p++){
if((*p)->inuse == 0)
continue;
ifc = (Ipifc*)(*p)->ptcl;
if(waserror()){
wunlock(ifc);
nexterror();
}
wlock(ifc);
for(lifc = ifc->lifc; lifc; lifc = lifc->next)
if(ipcmp(ia, lifc->local) == 0)
remselfcache(f, ifc, lifc, ma);
wunlock(ifc);
poperror();
}
free(multi);
}
/*
* remove a multicast address from an interface, called with c locked
*/
void ipifcremmulti(struct conv *c, uint8_t * ma, uint8_t * ia)
{
ERRSTACK(1);
struct Ipmulti *multi, **l;
struct Iplifc *lifc;
struct conv **p;
struct Ipifc *ifc;
struct Fs *f;
f = c->p->f;
for (l = &c->multi; *l; l = &(*l)->next)
if (ipcmp(ma, (*l)->ma) == 0)
if (ipcmp(ia, (*l)->ia) == 0)
break;
multi = *l;
if (multi == NULL)
return; /* we don't have it open */
*l = multi->next;
for (p = f->ipifc->conv; *p; p++) {
if ((*p)->inuse == 0)
continue;
ifc = (struct Ipifc *)(*p)->ptcl;
if (waserror()) {
wunlock(&ifc->rwlock);
nexterror();
}
wlock(&ifc->rwlock);
for (lifc = ifc->lifc; lifc; lifc = lifc->next)
if (ipcmp(ia, lifc->local) == 0)
remselfcache(f, ifc, lifc, ma);
wunlock(&ifc->rwlock);
poperror();
}
kfree(multi);
}
/*
* remove a logical interface from an ifc
* always called with ifc wlock'd
*/
static char*
ipifcremlifc(Ipifc *ifc, Iplifc *lifc)
{
Iplifc **l;
Fs *f;
f = ifc->conv->p->f;
/*
* find address on this interface and remove from chain.
* for pt to pt we actually specify the remote address as the
* addresss to remove.
*/
for(l = &ifc->lifc; *l != nil && *l != lifc; l = &(*l)->next)
;
if(*l == nil)
return "address not on this interface";
*l = lifc->next;
/* disassociate any addresses */
while(lifc->link)
remselfcache(f, ifc, lifc, lifc->link->self->a);
/* remove the route for this logical interface */
if(isv4(lifc->local))
v4delroute(f, lifc->remote+IPv4off, lifc->mask+IPv4off, 1);
else {
v6delroute(f, lifc->remote, lifc->mask, 1);
if(ipcmp(lifc->local, v6loopback) == 0)
/* remove route for all node multicast */
v6delroute(f, v6allnodesN, v6allnodesNmask, 1);
else if(memcmp(lifc->local, v6linklocal, v6llpreflen) == 0)
/* remove route for all link multicast */
v6delroute(f, v6allnodesL, v6allnodesLmask, 1);
}
free(lifc);
return nil;
}
