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authorWilliam Allen Simpson <william.allen.simpson@gmail.com>2009-12-02 18:14:19 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-02 22:07:24 -0800
commit519855c508b9a17878c0977a3cdefc09b59b30df (patch)
treedf6840c5c1560a84cb777b1855ec22c90c3df8d9 /net/ipv4/sysctl_net_ipv4.c
parentTCPCT part 1b: generate Responder Cookie secret (diff)
downloadlinux-dev-519855c508b9a17878c0977a3cdefc09b59b30df.tar.xz
linux-dev-519855c508b9a17878c0977a3cdefc09b59b30df.zip
TCPCT part 1c: sysctl_tcp_cookie_size, socket option TCP_COOKIE_TRANSACTIONS
Define sysctl (tcp_cookie_size) to turn on and off the cookie option default globally, instead of a compiled configuration option. Define per socket option (TCP_COOKIE_TRANSACTIONS) for setting constant data values, retrieving variable cookie values, and other facilities. Move inline tcp_clear_options() unchanged from net/tcp.h to linux/tcp.h, near its corresponding struct tcp_options_received (prior to changes). This is a straightforward re-implementation of an earlier (year-old) patch that no longer applies cleanly, with permission of the original author (Adam Langley): http://thread.gmane.org/gmane.linux.network/102586 These functions will also be used in subsequent patches that implement additional features. Requires: net: TCP_MSS_DEFAULT, TCP_MSS_DESIRED Signed-off-by: William.Allen.Simpson@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index c00323bae044..13f7ab6ad6a0 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -714,6 +714,14 @@ static struct ctl_table ipv4_table[] = {
},
{
.ctl_name = CTL_UNNUMBERED,
+ .procname = "tcp_cookie_size",
+ .data = &sysctl_tcp_cookie_size,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
.procname = "udp_mem",
.data = &sysctl_udp_mem,
.maxlen = sizeof(sysctl_udp_mem),