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authorWilliam Allen Simpson <william.allen.simpson@gmail.com>2009-11-10 09:51:18 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-13 20:38:48 -0800
commitbee7ca9ec03a26676ea2b1c28dc4039348eff3e1 (patch)
tree652832d73252d7c9ede928a4242763f570070b0e /include
parentcbbef5e183079455763fc470ccf69008f92ab4b6 (diff)
net: TCP_MSS_DEFAULT, TCP_MSS_DESIRED
Define two symbols needed in both kernel and user space. Remove old (somewhat incorrect) kernel variant that wasn't used in most cases. Default should apply to both RMSS and SMSS (RFC2581). Replace numeric constants with defined symbols. Stand-alone patch, originally developed for TCPCT. Signed-off-by: William.Allen.Simpson@gmail.com Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/tcp.h6
-rw-r--r--include/net/tcp.h3
2 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index eeecb8547a2..32d7d77b4a0 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -81,6 +81,12 @@ enum {
TCP_DATA_OFFSET = __cpu_to_be32(0xF0000000)
};
+/*
+ * TCP general constants
+ */
+#define TCP_MSS_DEFAULT 536U /* IPv4 (RFC1122, RFC2581) */
+#define TCP_MSS_DESIRED 1220U /* IPv6 (tunneled), EDNS0 (RFC3226) */
+
/* TCP socket options */
#define TCP_NODELAY 1 /* Turn off Nagle's algorithm. */
#define TCP_MAXSEG 2 /* Limit MSS */
diff --git a/include/net/tcp.h b/include/net/tcp.h
index bf20f88fd03..325bfcf5c93 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -62,9 +62,6 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
/* Minimal accepted MSS. It is (60+60+8) - (20+20). */
#define TCP_MIN_MSS 88U
-/* Minimal RCV_MSS. */
-#define TCP_MIN_RCVMSS 536U
-
/* The least MTU to use for probing */
#define TCP_BASE_MSS 512