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Use stronger random number generation for TCP_ISSINCR and tcp_iss.

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Reviewed by:	peter, jlemon
This commit is contained in:
Kris Kennaway 2000-09-29 01:37:19 +00:00
parent 5edc357219
commit be515d91ad
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=66433
3 changed files with 3 additions and 3 deletions
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2
sys/netinet/tcp_seq.h
View File

@ -91,7 +91,7 @@ extern tcp_cc tcp_ccgen; /* global connection count */
* number in the range [0-0x3ffff] that is hard to predict.
*/
#ifndef tcp_random18
#define tcp_random18() ((random() >> 14) & 0x3ffff)
#define tcp_random18() (arc4random() & 0x3ffff)
#endif
#define TCP_ISSINCR (122*1024 + tcp_random18())

2
sys/netinet/tcp_subr.c
View File

@ -178,7 +178,7 @@ tcp_init()
{
int hashsize;
tcp_iss = random(); /* wrong, but better than a constant */
tcp_iss = arc4random(); /* wrong, but better than a constant */
tcp_ccgen = 1;
tcp_cleartaocache();

2
sys/netinet/tcp_timewait.c
View File

@ -178,7 +178,7 @@ tcp_init()
{
int hashsize;
tcp_iss = random(); /* wrong, but better than a constant */
tcp_iss = arc4random(); /* wrong, but better than a constant */
tcp_ccgen = 1;
tcp_cleartaocache();