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authorYuchung Cheng <ycheng@google.com>2012-07-19 02:43:05 -0400
committerDavid S. Miller <davem@davemloft.net>2012-07-19 13:55:36 -0400
commit2100c8d2d9db23c0a09901a782bb4e3b21bee298 (patch)
treefd5842c540bf77c3fa546797c1c8e94f054cc86c /include/linux/tcp.h
parent4cce66cdd14aa5006a011505865d932adb49f600 (diff)
net-tcp: Fast Open base
This patch impelements the common code for both the client and server. 1. TCP Fast Open option processing. Since Fast Open does not have an option number assigned by IANA yet, it shares the experiment option code 254 by implementing draft-ietf-tcpm-experimental-options with a 16 bits magic number 0xF989. This enables global experiments without clashing the scarce(2) experimental options available for TCP. When the draft status becomes standard (maybe), the client should switch to the new option number assigned while the server supports both numbers for transistion. 2. The new sysctl tcp_fastopen 3. A place holder init function Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/tcp.h')
-rw-r--r--include/linux/tcp.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 1888169e07c7..12948f543839 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -243,6 +243,16 @@ static inline unsigned int tcp_optlen(const struct sk_buff *skb)
243 return (tcp_hdr(skb)->doff - 5) * 4; 243 return (tcp_hdr(skb)->doff - 5) * 4;
244} 244}
245 245
246/* TCP Fast Open */
247#define TCP_FASTOPEN_COOKIE_MIN 4 /* Min Fast Open Cookie size in bytes */
248#define TCP_FASTOPEN_COOKIE_MAX 16 /* Max Fast Open Cookie size in bytes */
249
250/* TCP Fast Open Cookie as stored in memory */
251struct tcp_fastopen_cookie {
252 s8 len;
253 u8 val[TCP_FASTOPEN_COOKIE_MAX];
254};
255
246/* This defines a selective acknowledgement block. */ 256/* This defines a selective acknowledgement block. */
247struct tcp_sack_block_wire { 257struct tcp_sack_block_wire {
248 __be32 start_seq; 258 __be32 start_seq;