mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2025-01-13 14:40:22 +00:00
Code Issues Releases Activity

When incrementing through a SIOCGIFCONF list, enforce a lower limit of

Browse Source 
sizeof(ifr->ifr_addr) for the variable length field ifr->ifr_addr.sa_len.
Otherwise the increment will be wrong in certain cases.

Obtained from:  Whistle source tree
For the record: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> suggests
                SIOCGIFCONF should be dropped in favor of a sysctl mechanism.
This commit is contained in:
Archie Cobbs 1999-06-05 05:55:07 +00:00
parent 3816c56cc1
commit eed2b804bf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=47754
3 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sbin/natd/natd.c
View File

@ -9,7 +9,7 @@
*
* Ari Suutari <suutari@iki.fi>
*
* $Id: natd.c,v 1.16 1999/05/13 16:58:31 brian Exp $
* $Id: natd.c,v 1.17 1999/05/13 17:09:44 brian Exp $
*/
#define SYSLOG_NAMES
@ -762,6 +762,8 @@ static void SetAliasAddressFromIfName (char* ifn)
}
extra = ifPtr->ifr_addr.sa_len - sizeof (struct sockaddr);
if (extra < 0)
extra = 0;
ifPtr++;
ifPtr = (struct ifreq*) ((char*) ifPtr + extra);

5
sbin/route/route.c
View File

@ -42,7 +42,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)route.c 8.3 (Berkeley) 3/19/94";
#endif
static const char rcsid[] =
"$Id: route.c,v 1.29 1998/07/28 06:25:35 charnier Exp $";
"$Id: route.c,v 1.30 1999/06/01 13:14:07 ru Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -794,7 +794,8 @@ getaddr(which, s, hpp)
(ifconf.ifc_buf + ifconf.ifc_len);
ifr < ifr_end;
ifr = (struct ifreq *) ((char *) &ifr->ifr_addr
+ ifr->ifr_addr.sa_len)) {
+ MAX(ifr->ifr_addr.sa_len,
sizeof(ifr->ifr_addr)))) {
dl = (struct sockaddr_dl *)&ifr->ifr_addr;
if (ifr->ifr_addr.sa_family == AF_LINK
&& (ifr->ifr_flags & IFF_POINTOPOINT)

15
usr.sbin/pppd/sys-bsd.c
View File

@ -21,7 +21,7 @@
*/
#ifndef lint
static char rcsid[] = "$Id: sys-bsd.c,v 1.14 1998/06/20 18:02:16 peter Exp $";
static char rcsid[] = "$Id: sys-bsd.c,v 1.15 1998/06/21 04:47:21 peter Exp $";
#endif
/* $NetBSD: sys-bsd.c,v 1.1.1.3 1997/09/26 18:53:04 christos Exp $ */
@ -1378,8 +1378,9 @@ get_ether_addr(ipaddr, hwaddr)
* address on the same subnet as `ipaddr'.
*/
ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
for (ifr = ifc.ifc_req; ifr < ifend;
ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
+ MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
if (ifr->ifr_addr.sa_family == AF_INET) {
ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
@ -1425,7 +1426,8 @@ get_ether_addr(ipaddr, hwaddr)
BCOPY(dla, hwaddr, dla->sdl_len);
return 1;
}
ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
+ MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)));
}
return 0;
@ -1468,8 +1470,9 @@ GetMask(addr)
return mask;
}
ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
for (ifr = ifc.ifc_req; ifr < ifend;
ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
+ MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
/*
* Check the interface's internet address.
*/