From b71d21c274eff20a9db8158882b545b141b73ab8 Mon Sep 17 00:00:00 2001 From: Laszlo Toth Date: Mon, 23 Oct 2017 19:19:33 +0200 Subject: sctp: full support for ipv6 ip_nonlocal_bind & IP_FREEBIND Commit 9b9742022888 ("sctp: support ipv6 nonlocal bind") introduced support for the above options as v4 sctp did, so patched sctp_v6_available(). In the v4 implementation it's enough, because sctp_inet_bind_verify() just returns with sctp_v4_available(). However sctp_inet6_bind_verify() has an extra check before that for link-local scope_id, which won't respect the above options. Added the checks before calling ipv6_chk_addr(), but not before the validation of scope_id. before (w/ both options): ./v6test fe80::10 sctp bind failed, errno: 99 (Cannot assign requested address) ./v6test fe80::10 tcp bind success, errno: 0 (Success) after (w/ both options): ./v6test fe80::10 sctp bind success, errno: 0 (Success) Signed-off-by: Laszlo Toth Reviewed-by: Xin Long Signed-off-by: David S. Miller --- net/sctp/ipv6.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'net/sctp/ipv6.c') diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 51c488769590..7fe9e1d1b7ec 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -882,8 +882,10 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) net = sock_net(&opt->inet.sk); rcu_read_lock(); dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id); - if (!dev || - !ipv6_chk_addr(net, &addr->v6.sin6_addr, dev, 0)) { + if (!dev || !(opt->inet.freebind || + net->ipv6.sysctl.ip_nonlocal_bind || + ipv6_chk_addr(net, &addr->v6.sin6_addr, + dev, 0))) { rcu_read_unlock(); return 0; } -- cgit v1.2.3 From 978aa0474115f3f5848949f2efce4def0766a5cb Mon Sep 17 00:00:00 2001 From: Xin Long Date: Sat, 28 Oct 2017 19:43:57 +0800 Subject: sctp: fix some type cast warnings introduced since very beginning These warnings were found by running 'make C=2 M=net/sctp/'. They are there since very beginning. Note after this patch, there still one warning left in sctp_outq_flush(): sctp_chunk_fail(chunk, SCTP_ERROR_INV_STRM) Since it has been moved to sctp_stream_outq_migrate on net-next, to avoid the extra job when merging net-next to net, I will post the fix for it after the merging is done. Reported-by: Eric Dumazet Signed-off-by: Xin Long Signed-off-by: David S. Miller --- net/sctp/ipv6.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/sctp/ipv6.c') diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 7fe9e1d1b7ec..a6dfa86c0201 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -738,7 +738,7 @@ static int sctp_v6_skb_iif(const struct sk_buff *skb) /* Was this packet marked by Explicit Congestion Notification? */ static int sctp_v6_is_ce(const struct sk_buff *skb) { - return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); + return *((__u32 *)(ipv6_hdr(skb))) & (__force __u32)htonl(1 << 20); } /* Dump the v6 addr to the seq file. */ -- cgit v1.2.3