diff options
| author | Jun-ichiro itojun Hagino <itojun@cvs.openbsd.org> | 2002-08-28 03:19:39 +0000 |
|---|---|---|
| committer | Jun-ichiro itojun Hagino <itojun@cvs.openbsd.org> | 2002-08-28 03:19:39 +0000 |
| commit | 3dfee6456d2c772e57a649ee455e7027e4ddda89 (patch) | |
| tree | ade3caf9a121b02b46558373663f05a0a3e6c49f | |
| parent | d8c0dad438624e008b21faf1c11a4f7effabc8f1 (diff) | |
Limit UDP payload size for EDNS0 to 0xffff, not use lower 16bit value.
from onoe@sm.sony.co.jp
| -rw-r--r-- | lib/libc/net/res_mkquery.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/libc/net/res_mkquery.c b/lib/libc/net/res_mkquery.c index 6e57ec32178..6cd6a00dbe4 100644 --- a/lib/libc/net/res_mkquery.c +++ b/lib/libc/net/res_mkquery.c @@ -1,4 +1,4 @@ -/* $OpenBSD: res_mkquery.c,v 1.11 2002/06/26 06:01:16 itojun Exp $ */ +/* $OpenBSD: res_mkquery.c,v 1.12 2002/08/28 03:19:38 itojun Exp $ */ /* * ++Copyright++ 1985, 1993 @@ -60,7 +60,7 @@ static char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93"; static char rcsid[] = "$From: res_mkquery.c,v 8.5 1996/08/27 08:33:28 vixie Exp $"; #else -static char rcsid[] = "$OpenBSD: res_mkquery.c,v 1.11 2002/06/26 06:01:16 itojun Exp $"; +static char rcsid[] = "$OpenBSD: res_mkquery.c,v 1.12 2002/08/28 03:19:38 itojun Exp $"; #endif #endif /* LIBC_SCCS and not lint */ @@ -217,6 +217,8 @@ res_opt(n0, buf, buflen, anslen) __putshort(T_OPT, cp); /* TYPE */ cp += INT16SZ; + if (anslen > 0xffff) + anslen = 0xffff; /* limit to 16bit value */ __putshort(anslen & 0xffff, cp); /* CLASS = UDP payload size */ cp += INT16SZ; *cp++ = NOERROR; /* extended RCODE */ |