sctp: Support ipv6only AF_INET6 sockets.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index a2f4d4d..a238d683 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -818,7 +818,7 @@
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 @@
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 @@
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);
@@ -919,9 +928,12 @@
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;
- return 2;
+ 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 = {
