sctp: support ipv6 nonlocal bind

This patch makes sctp support ipv6 nonlocal bind by adding sp->inet.freebind and net->ipv6.sysctl.ip_nonlocal_bind check in sctp_v6_available as what sctp did to support ipv4 nonlocal bind (commit cdac4e0). Reported-by: Shijoe George <[email protected]> Signed-off-by: Xin Long <[email protected]> Acked-by: Marcelo Ricardo Leitner <[email protected]> Signed-off-by: David S. Miller <[email protected]>
torvalds · Jul 25, 2016 · 9b97420 · 9b97420
1 parent da54bb1
commit 9b97420
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
@@ -560,6 +560,7 @@ static int sctp_v6_is_any(const union sctp_addr *addr)
 static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
 {
 	int type;
+	struct net *net = sock_net(&sp->inet.sk);
 	const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr;
 
 	type = ipv6_addr_type(in6);
@@ -574,7 +575,8 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
 	if (!(type & IPV6_ADDR_UNICAST))
 		return 0;
 
-	return ipv6_chk_addr(sock_net(&sp->inet.sk), in6, NULL, 0);
+	return sp->inet.freebind || net->ipv6.sysctl.ip_nonlocal_bind ||
+		ipv6_chk_addr(net, in6, NULL, 0);
 }
 
 /* This function checks if the address is a valid address to be used for