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cast u_char for ctype (nwid stuff) to fix possible overrun problems.

This commit is contained in:
onoe 2000-07-06 08:20:51 +00:00
parent f744825091
commit 27f79f7369
1 changed files with 5 additions and 4 deletions
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9
sbin/ifconfig/ifconfig.c
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@ -1,4 +1,4 @@
/* $NetBSD: ifconfig.c,v 1.83 2000/07/06 00:50:49 onoe Exp $ */
/* $NetBSD: ifconfig.c,v 1.84 2000/07/06 08:20:51 onoe Exp $ */
/*-
* Copyright (c) 1997, 1998, 2000 The NetBSD Foundation, Inc.
@ -80,7 +80,7 @@ __COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
#if 0
static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94";
#else
__RCSID("$NetBSD: ifconfig.c,v 1.83 2000/07/06 00:50:49 onoe Exp $");
__RCSID("$NetBSD: ifconfig.c,v 1.84 2000/07/06 08:20:51 onoe Exp $");
#endif
#endif /* not lint */
@ -1101,9 +1101,10 @@ setifnwid(val, d)
if (val[0] == '0' && (val[1] == 'x' || val[1] == 'X')) {
val += 2;
p = nwid.i_nwid;
while (isxdigit(val[0]) && isxdigit(val[1])) {
while (isxdigit((u_char)val[0]) && isxdigit((u_char)val[1])) {
#define tohex(x) (isdigit(x) ? (x) - '0' : tolower(x) - 'a' + 10)
*p++ = (tohex(val[0]) << 4) | tohex(val[1]);
*p++ = (tohex((u_char)val[0]) << 4) |
tohex((u_char)val[1]);
#undef tohex
val += 2;
}