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[TCP]: Add IPv6 support to TCP SYN cookies

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Updated to incorporate Eric's suggestion of using a per cpu buffer
rather than allocating on the stack.  Just a two line change, but will
resend in it's entirety.

Signed-off-by: Glenn Griffin <ggriffin.kernel@gmail.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
Glenn Griffin
2008-02-07 21:49:26 -08:00
committed by YOSHIFUJI Hideaki
parent 11baab7ac3
commit c6aefafb7e
8 changed files with 338 additions and 26 deletions
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7
net/ipv4/syncookies.c
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@ -10,8 +10,6 @@
* 2 of the License, or (at your option) any later version.
*
* $Id: syncookies.c,v 1.18 2002/02/01 22:01:04 davem Exp $
*
* Missing: IPv6 support.
*/
#include <linux/tcp.h>
@ -23,14 +21,15 @@
extern int sysctl_tcp_syncookies;
static __u32 syncookie_secret[2][16-3+SHA_DIGEST_WORDS];
__u32 syncookie_secret[2][16-3+SHA_DIGEST_WORDS];
EXPORT_SYMBOL(syncookie_secret);
static __init int init_syncookies(void)
{
get_random_bytes(syncookie_secret, sizeof(syncookie_secret));
return 0;
}
module_init(init_syncookies);
__initcall(init_syncookies);
#define COOKIEBITS 24 /* Upper bits store count */
#define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1)