* - parsing assistance functions (mainly for domains inside datagrams)
*/
/*
- * This file is
- * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
- *
- * It is part of adns, which is
- * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
+ * This file is part of adns, which is
+ * Copyright (C) 1997-2000,2003,2006 Ian Jackson
+ * Copyright (C) 1999-2000,2003,2006 Tony Finch
+ * Copyright (C) 1991 Massachusetts Institute of Technology
+ * (See the file INSTALL for full details.)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
int *rdlen_r, int *rdstart_r,
const byte *eo_dgram, int eo_dglen,
int eo_cbyte, int *eo_matched_r) {
- findlabel_state fls, eo_fls;
+ findlabel_state fls, eo_fls_buf;
+ findlabel_state *eo_fls; /* 0 iff we know it's not matching eo_... */
int cbyte;
- int tmp, rdlen, mismatch;
+ int tmp, rdlen;
unsigned long ttl;
int lablen, labstart, ch;
int eo_lablen, eo_labstart, eo_ch;
adns__findlabel_start(&fls,qu->ads, serv,qu, dgram,dglen,dglen,cbyte,&cbyte);
if (eo_dgram) {
- adns__findlabel_start(&eo_fls,qu->ads, -1,0,
+ eo_fls= &eo_fls_buf;
+ adns__findlabel_start(eo_fls,qu->ads, -1,0,
eo_dgram,eo_dglen,eo_dglen,eo_cbyte,0);
- mismatch= 0;
} else {
- mismatch= 1;
+ eo_fls= 0;
}
for (;;) {
if (st) return st;
if (lablen<0) goto x_truncated;
- if (!mismatch) {
- st= adns__findlabel_next(&eo_fls,&eo_lablen,&eo_labstart);
+ if (eo_fls) {
+ st= adns__findlabel_next(eo_fls,&eo_lablen,&eo_labstart);
assert(!st); assert(eo_lablen>=0);
- if (lablen != eo_lablen) mismatch= 1;
- while (!mismatch && eo_lablen-- > 0) {
+ if (lablen != eo_lablen) eo_fls= 0;
+ while (eo_fls && eo_lablen-- > 0) {
ch= dgram[labstart++]; if (ctype_alpha(ch)) ch &= ~32;
eo_ch= eo_dgram[eo_labstart++]; if (ctype_alpha(eo_ch)) eo_ch &= ~32;
- if (ch != eo_ch) mismatch= 1;
+ if (ch != eo_ch) eo_fls= 0;
}
}
if (!lablen) break;
}
- if (eo_matched_r) *eo_matched_r= !mismatch;
+ if (eo_matched_r) *eo_matched_r= !!eo_fls;
if (cbyte+10>dglen) goto x_truncated;
GET_W(cbyte,tmp); *type_r= tmp;