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If syncookies are disabled (net.inet.tcp.syncookies) then use the faster

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arc4random() routine to generate ISNs instead of creating them with MD5().

Suggested by: silby
This commit is contained in:
jlemon 2001-12-21 04:41:08 +00:00
parent d39f9b4517
commit 87be243fa6
2 changed files with 5 additions and 1 deletions
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1
sys/netinet/tcp_debug.c
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@ -55,6 +55,7 @@
#include <sys/protosw.h>
#include <sys/socket.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>

5
sys/netinet/tcp_syncache.c
View File

@ -900,7 +900,10 @@ syncache_add(inc, to, th, sop, m)
sc->sc_route.ro_rt = NULL;
}
sc->sc_irs = th->th_seq;
sc->sc_iss = syncookie_generate(sc);
if (tcp_syncookies)
sc->sc_iss = syncookie_generate(sc);
else
sc->sc_iss = arc4random();
/* Initial receive window: clip sbspace to [0 .. TCP_MAXWIN] */
win = sbspace(&so->so_rcv);