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Commit 7dab83de authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller
Browse files

sctp: Support ipv6only AF_INET6 sockets. 



Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6d0ccbac

include/net/sctp/structs.h

+2 −0
Original line number Diff line number Diff line
@@ -1211,6 +1211,8 @@ int sctp_add_bind_addr(struct sctp_bind_addr *, union sctp_addr *, 
int sctp_del_bind_addr(struct sctp_bind_addr *, union sctp_addr *);

int sctp_bind_addr_match(struct sctp_bind_addr *, const union sctp_addr *,

			 struct sctp_sock *);

int sctp_bind_addr_conflict(struct sctp_bind_addr *, const union sctp_addr *,

			 struct sctp_sock *, struct sctp_sock *);

int sctp_bind_addr_state(const struct sctp_bind_addr *bp,

			 const union sctp_addr *addr);

union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr	*bp,

net/sctp/bind_addr.c

+37 −0
Original line number Diff line number Diff line
@@ -348,6 +348,43 @@ int sctp_bind_addr_match(struct sctp_bind_addr *bp, 
	return match;

}



/* Does the address 'addr' conflict with any addresses in

 * the bp.

 */

int sctp_bind_addr_conflict(struct sctp_bind_addr *bp,

			    const union sctp_addr *addr,

			    struct sctp_sock *bp_sp,

			    struct sctp_sock *addr_sp)

{

	struct sctp_sockaddr_entry *laddr;

	int conflict = 0;

	struct sctp_sock *sp;



	/* Pick the IPv6 socket as the basis of comparison

	 * since it's usually a superset of the IPv4.

	 * If there is no IPv6 socket, then default to bind_addr.

	 */

	if (sctp_opt2sk(bp_sp)->sk_family == AF_INET6)

		sp = bp_sp;

	else if (sctp_opt2sk(addr_sp)->sk_family == AF_INET6)

		sp = addr_sp;

	else

		sp = bp_sp;



	rcu_read_lock();

	list_for_each_entry_rcu(laddr, &bp->address_list, list) {

		if (!laddr->valid)

			continue;



		conflict = sp->pf->cmp_addr(&laddr->a, addr, sp);

		if (conflict)

			break;

	}

	rcu_read_unlock();



	return conflict;

}



/* Get the state of the entry in the bind_addr_list */

int sctp_bind_addr_state(const struct sctp_bind_addr *bp,

			 const union sctp_addr *addr)

net/sctp/ipv6.c

+16 −4
Original line number Diff line number Diff line
@@ -818,7 +818,7 @@ static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) 
		return 1;

	/* v4-mapped-v6 addresses */

	case AF_INET:

		if (!__ipv6_only_sock(sctp_opt2sk(sp)) && sp->v4mapped)

		if (!__ipv6_only_sock(sctp_opt2sk(sp)))

			return 1;

	default:

		return 0;
@@ -840,6 +840,11 @@ static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, 


	if (!af1 || !af2)

		return 0;



	/* If the socket is IPv6 only, v4 addrs will not match */

	if (__ipv6_only_sock(sctp_opt2sk(opt)) && af1 != af2)

		return 0;



	/* Today, wildcard AF_INET/AF_INET6. */

	if (sctp_is_any(addr1) || sctp_is_any(addr2))

		return 1;
@@ -876,7 +881,11 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) 
				return 0;

			}

			dev_put(dev);

		} else if (type == IPV6_ADDR_MAPPED) {

			if (!opt->v4mapped)

				return 0;

		}



		af = opt->pf->af;

	}

	return af->available(addr, opt);
@@ -919,10 +928,13 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) 
static int sctp_inet6_supported_addrs(const struct sctp_sock *opt,

				      __be16 *types)

{

	types[0] = SCTP_PARAM_IPV4_ADDRESS;

	types[1] = SCTP_PARAM_IPV6_ADDRESS;

	types[0] = SCTP_PARAM_IPV6_ADDRESS;

	if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) {

		types[1] = SCTP_PARAM_IPV4_ADDRESS;

		return 2;

	}

	return 1;

}



static const struct proto_ops inet6_seqpacket_ops = {

	.family		   = PF_INET6,

net/sctp/protocol.c

+7 −0
Original line number Diff line number Diff line
@@ -381,6 +381,10 @@ static int sctp_v4_addr_valid(union sctp_addr *addr, 
			      struct sctp_sock *sp,

			      const struct sk_buff *skb)

{

	/* IPv4 addresses not allowed */

	if (sp && ipv6_only_sock(sctp_opt2sk(sp)))

		return 0;



	/* Is this a non-unicast address or a unusable SCTP address? */

	if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr))

		return 0;
@@ -404,6 +408,9 @@ static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp) 
	   !sysctl_ip_nonlocal_bind)

		return 0;



	if (ipv6_only_sock(sctp_opt2sk(sp)))

		return 0;



	return 1;

}

net/sctp/sm_make_chunk.c

+6 −1
Original line number Diff line number Diff line
@@ -2364,8 +2364,13 @@ static int sctp_process_param(struct sctp_association *asoc, 
	case SCTP_PARAM_IPV6_ADDRESS:

		if (PF_INET6 != asoc->base.sk->sk_family)

			break;

		/* Fall through. */

		goto do_addr_param;



	case SCTP_PARAM_IPV4_ADDRESS:

		/* v4 addresses are not allowed on v6-only socket */

		if (ipv6_only_sock(asoc->base.sk))

			break;

do_addr_param:

		af = sctp_get_af_specific(param_type2af(param.p->type));

		af->from_addr_param(&addr, param.addr, htons(asoc->peer.port), 0);

		scope = sctp_scope(peer_addr);