int
inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct rtattr **rta = arg;
struct in_device *in_dev;
struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
struct in_ifaddr *ifa, **ifap;
ASSERT_RTNL();
if ((in_dev = inetdev_by_index(ifm->ifa_index)) == NULL)
return -EADDRNOTAVAIL;
__in_dev_put(in_dev);
for (ifap=&in_dev->ifa_list; (ifa=*ifap)!=NULL; ifap=&ifa->ifa_next) {
if ((rta[IFA_LOCAL-1] && memcmp(RTA_DATA(rta[IFA_LOCAL-1]), &ifa->ifa_local, 4)) ||
(rta[IFA_LABEL-1] && strcmp(RTA_DATA(rta[IFA_LABEL-1]), ifa->ifa_label)) ||
(rta[IFA_ADDRESS-1] &&
(ifm->ifa_prefixlen != ifa->ifa_prefixlen ||
!inet_ifa_match(*(u32*)RTA_DATA(rta[IFA_ADDRESS-1]), ifa))))
continue;
inet_del_ifa(in_dev, ifap, 1);
return 0;
}
return -EADDRNOTAVAIL;
}
int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr)
{
struct ip_mc_socklist *iml, **imlp;
rtnl_lock();
for (imlp=&sk->protinfo.af_inet.mc_list; (iml=*imlp)!=NULL; imlp=&iml->next) {
if (iml->multi.imr_multiaddr.s_addr==imr->imr_multiaddr.s_addr &&
iml->multi.imr_address.s_addr==imr->imr_address.s_addr &&
(!imr->imr_ifindex || iml->multi.imr_ifindex==imr->imr_ifindex)) {
struct in_device *in_dev;
if (--iml->count) {
rtnl_unlock();
return 0;
}
*imlp = iml->next;
in_dev = inetdev_by_index(iml->multi.imr_ifindex);
if (in_dev) {
ip_mc_dec_group(in_dev, imr->imr_multiaddr.s_addr);
in_dev_put(in_dev);
}
rtnl_unlock();
sock_kfree_s(sk, iml, sizeof(*iml));
return 0;
}
}
rtnl_unlock();
return -EADDRNOTAVAIL;
}
int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr)
{
int err;
u32 addr = imr->imr_multiaddr.s_addr;
struct ip_mc_socklist *iml, *i;
struct in_device *in_dev;
int count = 0;
if (!MULTICAST(addr))
return -EINVAL;
rtnl_shlock();
if (!imr->imr_ifindex)
in_dev = ip_mc_find_dev(imr);
else {
in_dev = inetdev_by_index(imr->imr_ifindex);
if (in_dev)
__in_dev_put(in_dev);
}
if (!in_dev) {
iml = NULL;
err = -ENODEV;
goto done;
}
iml = (struct ip_mc_socklist *)sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL);
err = -EADDRINUSE;
for (i=sk->protinfo.af_inet.mc_list; i; i=i->next) {
if (memcmp(&i->multi, imr, sizeof(*imr)) == 0) {
/* New style additions are reference counted */
if (imr->imr_address.s_addr == 0) {
i->count++;
err = 0;
}
goto done;
}
count++;
}
err = -ENOBUFS;
if (iml == NULL || count >= sysctl_igmp_max_memberships)
goto done;
memcpy(&iml->multi, imr, sizeof(*imr));
iml->next = sk->protinfo.af_inet.mc_list;
iml->count = 1;
sk->protinfo.af_inet.mc_list = iml;
ip_mc_inc_group(in_dev, addr);
iml = NULL;
err = 0;
done:
rtnl_shunlock();
if (iml)
sock_kfree_s(sk, iml, sizeof(*iml));
return err;
}
static int ipgre_close(struct net_device *dev)
{
struct ip_tunnel *t = netdev_priv(dev);
if (ipv4_is_multicast(t->parms.iph.daddr) && t->mlink) {
struct in_device *in_dev;
in_dev = inetdev_by_index(t->net, t->mlink);
if (in_dev)
ip_mc_dec_group(in_dev, t->parms.iph.daddr);
}
return 0;
}
void ip_mc_drop_socket(struct sock *sk)
{
struct ip_mc_socklist *iml;
while ((iml=sk->ip_mc_list) != NULL) {
struct in_device *in_dev;
sk->ip_mc_list = iml->next;
if ((in_dev = inetdev_by_index(iml->multi.imr_ifindex)) != NULL)
ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr);
sock_kfree_s(sk, iml, sizeof(*iml));
}
}
static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct net *net = sock_net(skb->sk);
struct nlattr *tb[IFA_MAX+1];
struct in_device *in_dev;
struct ifaddrmsg *ifm;
struct in_ifaddr *ifa, **ifap;
int err = -EINVAL;
ASSERT_RTNL();
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy);
if (err < 0)
goto errout;
ifm = nlmsg_data(nlh);
in_dev = inetdev_by_index(net, ifm->ifa_index);
if (in_dev == NULL) {
err = -ENODEV;
goto errout;
}
__in_dev_put(in_dev);
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
ifap = &ifa->ifa_next) {
if (tb[IFA_LOCAL] &&
ifa->ifa_local != nla_get_be32(tb[IFA_LOCAL]))
continue;
if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
continue;
if (tb[IFA_ADDRESS] &&
(ifm->ifa_prefixlen != ifa->ifa_prefixlen ||
!inet_ifa_match(nla_get_be32(tb[IFA_ADDRESS]), ifa)))
continue;
__inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).pid);
return 0;
}
err = -EADDRNOTAVAIL;
errout:
return err;
}
void ip_mc_drop_socket(struct sock *sk)
{
struct ip_mc_socklist *iml;
if (sk->protinfo.af_inet.mc_list == NULL)
return;
rtnl_lock();
while ((iml=sk->protinfo.af_inet.mc_list) != NULL) {
struct in_device *in_dev;
sk->protinfo.af_inet.mc_list = iml->next;
if ((in_dev = inetdev_by_index(iml->multi.imr_ifindex)) != NULL) {
ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr);
in_dev_put(in_dev);
}
sock_kfree_s(sk, iml, sizeof(*iml));
}
rtnl_unlock();
}
int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr)
{
struct ip_mc_socklist *iml, **imlp;
for (imlp=&sk->ip_mc_list; (iml=*imlp)!=NULL; imlp=&iml->next) {
if (iml->multi.imr_multiaddr.s_addr==imr->imr_multiaddr.s_addr &&
iml->multi.imr_address.s_addr==imr->imr_address.s_addr &&
(!imr->imr_ifindex || iml->multi.imr_ifindex==imr->imr_ifindex)) {
struct in_device *in_dev;
if (--iml->count)
return 0;
*imlp = iml->next;
synchronize_bh();
in_dev = inetdev_by_index(iml->multi.imr_ifindex);
if (in_dev)
ip_mc_dec_group(in_dev, imr->imr_multiaddr.s_addr);
sock_kfree_s(sk, iml, sizeof(*iml));
return 0;
}
}
return -EADDRNOTAVAIL;
}
