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| author | Chris Clark <chris.clark@alcatel-lucent.com> | 2013-08-27 12:02:15 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-14 06:54:56 -0700 |
| commit | 5612d36ca1438c23280b962a80943d14b2e9f778 (patch) | |
| tree | 0f89de41d0798f0b531634a473dba47fe42e39a3 /net/ipv4 | |
| parent | 6fe6efd941d49f7169e78b2e60ca2dc6a56ca8b4 (diff) | |
| download | linux-3.10-5612d36ca1438c23280b962a80943d14b2e9f778.tar.gz linux-3.10-5612d36ca1438c23280b962a80943d14b2e9f778.tar.bz2 linux-3.10-5612d36ca1438c23280b962a80943d14b2e9f778.zip | |
ipv4: sendto/hdrincl: don't use destination address found in header
[ Upstream commit c27c9322d015dc1d9dfdf31724fca71c0476c4d1 ]
ipv4: raw_sendmsg: don't use header's destination address
A sendto() regression was bisected and found to start with commit
f8126f1d5136be1 (ipv4: Adjust semantics of rt->rt_gateway.)
The problem is that it tries to ARP-lookup the constructed packet's
destination address rather than the explicitly provided address.
Fix this using FLOWI_FLAG_KNOWN_NH so that given nexthop is used.
cf. commit 2ad5b9e4bd314fc685086b99e90e5de3bc59e26b
Reported-by: Chris Clark <chris.clark@alcatel-lucent.com>
Bisected-by: Chris Clark <chris.clark@alcatel-lucent.com>
Tested-by: Chris Clark <chris.clark@alcatel-lucent.com>
Suggested-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Chris Clark <chris.clark@alcatel-lucent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/raw.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c index dd44e0ab600..61e60d67adc 100644 --- a/net/ipv4/raw.c +++ b/net/ipv4/raw.c @@ -571,7 +571,8 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE, inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, - inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP, + inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP | + (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), daddr, saddr, 0, 0); if (!inet->hdrincl) { |