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Log the peer's IP address on received window scale factors larger than 

TCP_MAX_WINSHIFT (14), as recommended in Section 2.3 of RFC1323.
This commit is contained in:
thorpej 1998-04-28 21:52:16 +00:00
parent aba63e6a51
commit df750b93da
1 changed files with 11 additions and 2 deletions
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13
sys/netinet/tcp_input.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: tcp_input.c,v 1.51 1998/04/13 21:18:19 kml Exp $ */
/* $NetBSD: tcp_input.c,v 1.52 1998/04/28 21:52:16 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@ -91,6 +91,7 @@
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
@ -1444,7 +1445,15 @@ tcp_dooptions(tp, cp, cnt, ti, oi)
if (!(ti->ti_flags & TH_SYN))
continue;
tp->t_flags |= TF_RCVD_SCALE;
tp->requested_s_scale = min(cp[2], TCP_MAX_WINSHIFT);
tp->requested_s_scale = cp[2];
if (tp->requested_s_scale > TCP_MAX_WINSHIFT) {
log(LOG_ERR, "TCP: invalid wscale %d from "
"0x%08x, assuming %d\n",
tp->requested_s_scale,
ntohl(ti->ti_src.s_addr),
TCP_MAX_WINSHIFT);
tp->requested_s_scale = TCP_MAX_WINSHIFT;
}
break;
case TCPOPT_TIMESTAMP: