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authorYuchung Cheng <ycheng@google.com>2014-05-12 03:22:10 (GMT)
committerDavid S. Miller <davem@davemloft.net>2014-05-13 21:53:02 (GMT)
commit89278c9dc922272df921042aafa18311f3398c6c (patch)
tree0138bbfdcd757b29f89a999d8f7c84260b68f505 /net/ipv4/tcp_output.c
parent5b7ed0892f2af4e60b9a8d2c71c77774512a6cb9 (diff)
downloadlinux-89278c9dc922272df921042aafa18311f3398c6c.tar.xz
tcp: simplify fast open cookie processing
Consolidate various cookie checking and generation code to simplify the fast open processing. The main goal is to reduce code duplication in tcp_v4_conn_request() for IPv6 support. Removes two experimental sysctl flags TFO_SERVER_ALWAYS and TFO_SERVER_COOKIE_NOT_CHKD used primarily for developmental debugging purposes. Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Daniel Lee <longinus00@gmail.com> Signed-off-by: Jerry Chu <hkchu@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
-rw-r--r--net/ipv4/tcp_output.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 694711a..b20fc02 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -627,7 +627,7 @@ static unsigned int tcp_synack_options(struct sock *sk,
if (unlikely(!ireq->tstamp_ok))
remaining -= TCPOLEN_SACKPERM_ALIGNED;
}
- if (foc != NULL) {
+ if (foc != NULL && foc->len >= 0) {
u32 need = TCPOLEN_EXP_FASTOPEN_BASE + foc->len;
need = (need + 3) & ~3U; /* Align to 32 bits */
if (remaining >= need) {