Commit 2f984f11 authored by Al Viro's avatar Al Viro
Browse files

ipv[46]: do compat setsockopt for MCAST_{JOIN,LEAVE}_GROUP directly 



direct parallel to the way these two are handled in the native
->setsockopt() instances - the helpers that do the real work
are already separated and can be reused as-is in this case.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 168a2cca

net/ipv4/ip_sockglue.c

+31 −0
Original line number Diff line number Diff line
@@ -1282,6 +1282,37 @@ int compat_ip_setsockopt(struct sock *sk, int level, int optname, 
	switch (optname) {

	case MCAST_JOIN_GROUP:

	case MCAST_LEAVE_GROUP:

	{

		struct compat_group_req __user *gr32 = (void __user *)optval;

		struct group_req greq;

		struct sockaddr_in *psin = (struct sockaddr_in *)&greq.gr_group;

		struct ip_mreqn mreq;



		if (optlen < sizeof(struct compat_group_req))

			return -EINVAL;



		if (get_user(greq.gr_interface, &gr32->gr_interface) ||

		    copy_from_user(&greq.gr_group, &gr32->gr_group,

				sizeof(greq.gr_group)))

			return -EFAULT;



		if (psin->sin_family != AF_INET)

			return -EINVAL;



		memset(&mreq, 0, sizeof(mreq));

		mreq.imr_multiaddr = psin->sin_addr;

		mreq.imr_ifindex = greq.gr_interface;



		rtnl_lock();

		lock_sock(sk);

		if (optname == MCAST_JOIN_GROUP)

			err = ip_mc_join_group(sk, &mreq);

		else

			err = ip_mc_leave_group(sk, &mreq);

		release_sock(sk);

		rtnl_unlock();

		return err;

	}

	case MCAST_JOIN_SOURCE_GROUP:

	case MCAST_LEAVE_SOURCE_GROUP:

	case MCAST_BLOCK_SOURCE:

net/ipv6/ipv6_sockglue.c

+28 −0
Original line number Diff line number Diff line
@@ -976,6 +976,34 @@ int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, 
	switch (optname) {

	case MCAST_JOIN_GROUP:

	case MCAST_LEAVE_GROUP:

	{

		struct compat_group_req __user *gr32 = (void __user *)optval;

		struct group_req greq;

		struct sockaddr_in6 *psin6 = (struct sockaddr_in6 *)&greq.gr_group;



		if (optlen < sizeof(struct compat_group_req))

			return -EINVAL;



		if (get_user(greq.gr_interface, &gr32->gr_interface) ||

		    copy_from_user(&greq.gr_group, &gr32->gr_group,

				sizeof(greq.gr_group)))

			return -EFAULT;



		if (greq.gr_group.ss_family != AF_INET6)

			return -EADDRNOTAVAIL;



		rtnl_lock();

		lock_sock(sk);

		if (optname == MCAST_JOIN_GROUP)

			err = ipv6_sock_mc_join(sk, greq.gr_interface,

						 &psin6->sin6_addr);

		else

			err = ipv6_sock_mc_drop(sk, greq.gr_interface,

						 &psin6->sin6_addr);

		release_sock(sk);

		rtnl_unlock();

		return err;

	}

	case MCAST_JOIN_SOURCE_GROUP:

	case MCAST_LEAVE_SOURCE_GROUP:

	case MCAST_BLOCK_SOURCE:

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