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-rw-r--r--adns-0.6/src/parse.c253
1 files changed, 0 insertions, 253 deletions
diff --git a/adns-0.6/src/parse.c b/adns-0.6/src/parse.c
deleted file mode 100644
index 9a4e0c7..0000000
--- a/adns-0.6/src/parse.c
+++ /dev/null
@@ -1,253 +0,0 @@
-/*
- * parse.c
- * - parsing assistance functions (mainly for domains inside datagrams)
- */
-/*
- * This file is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- *
- * It is part of adns, which is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999 Tony Finch <dot@dotat.at>
- *
- * 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
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include "internal.h"
-
-int vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len) {
- char qbuf[10];
- int i, ch;
-
- while (len) {
- qbuf[0]= 0;
- for (i=0; i<len; i++) {
- ch= buf[i];
- if (ch == '.' || ch == '"' || ch == '(' || ch == ')' ||
- ch == '@' || ch == ';' || ch == '$' || ch == '\\') {
- sprintf(qbuf,"\\%c",ch);
- break;
- } else if (ch <= ' ' || ch >= 127) {
- sprintf(qbuf,"\\%03o",ch);
- break;
- }
- }
- if (!adns__vbuf_append(vb,buf,i) || !adns__vbuf_append(vb,qbuf,strlen(qbuf)))
- return 0;
- if (i<len) i++;
- buf+= i;
- len-= i;
- }
- return 1;
-}
-
-void adns__findlabel_start(findlabel_state *fls, adns_state ads,
- int serv, adns_query qu,
- const byte *dgram, int dglen, int max,
- int dmbegin, int *dmend_rlater) {
- fls->ads= ads;
- fls->qu= qu;
- fls->serv= serv;
- fls->dgram= dgram;
- fls->dglen= dglen;
- fls->max= max;
- fls->cbyte= dmbegin;
- fls->namelen= 0;
- fls->dmend_r= dmend_rlater;
-}
-
-adns_status adns__findlabel_next(findlabel_state *fls,
- int *lablen_r, int *labstart_r) {
- int lablen, jumped, jumpto;
- const char *dgram;
-
- jumped= 0;
- dgram= fls->dgram;
- for (;;) {
- if (fls->cbyte >= fls->dglen) goto x_truncated;
- if (fls->cbyte >= fls->max) goto x_badresponse;
- GET_B(fls->cbyte,lablen);
- if (!(lablen & 0x0c0)) break;
- if ((lablen & 0x0c0) != 0x0c0) return adns_s_unknownformat;
- if (jumped++) {
- adns__diag(fls->ads,fls->serv,fls->qu,"compressed datagram contains loop");
- return adns_s_invalidresponse;
- }
- if (fls->cbyte >= fls->dglen) goto x_truncated;
- if (fls->cbyte >= fls->max) goto x_badresponse;
- GET_B(fls->cbyte,jumpto);
- jumpto |= (lablen&0x3f)<<8;
- if (fls->dmend_r) *(fls->dmend_r)= fls->cbyte;
- fls->cbyte= jumpto;
- fls->dmend_r= 0; fls->max= fls->dglen+1;
- }
- if (labstart_r) *labstart_r= fls->cbyte;
- if (lablen) {
- if (fls->namelen) fls->namelen++;
- fls->namelen+= lablen;
- if (fls->namelen > DNS_MAXDOMAIN) return adns_s_answerdomaintoolong;
- fls->cbyte+= lablen;
- if (fls->cbyte > fls->dglen) goto x_truncated;
- if (fls->cbyte > fls->max) goto x_badresponse;
- } else {
- if (fls->dmend_r) *(fls->dmend_r)= fls->cbyte;
- }
- *lablen_r= lablen;
-/*if (labstart_r) fprintf(stderr,"label %d >%.*s<\n",lablen,lablen,fls->dgram+*labstart_r);*/
- return adns_s_ok;
-
- x_truncated:
- *lablen_r= -1;
- return adns_s_ok;
-
- x_badresponse:
- adns__diag(fls->ads,fls->serv,fls->qu,"label in domain runs beyond end of domain");
- return adns_s_invalidresponse;
-}
-
-adns_status adns__parse_domain(adns_state ads, int serv, adns_query qu,
- vbuf *vb, adns_queryflags flags,
- const byte *dgram, int dglen, int *cbyte_io, int max) {
- findlabel_state fls;
-
- adns__findlabel_start(&fls,ads, serv,qu, dgram,dglen,max, *cbyte_io,cbyte_io);
- vb->used= 0;
- return adns__parse_domain_more(&fls,ads,qu, vb,flags,dgram);
-}
-
-adns_status adns__parse_domain_more(findlabel_state *fls, adns_state ads,
- adns_query qu, vbuf *vb, parsedomain_flags flags,
- const byte *dgram) {
- int lablen, labstart, i, ch, first;
- adns_status st;
-
- first= 1;
- for (;;) {
- st= adns__findlabel_next(fls,&lablen,&labstart);
- if (st) return st;
- if (lablen<0) { vb->used=0; return adns_s_ok; }
- if (!lablen) break;
- if (first) {
- first= 0;
- } else {
- if (!adns__vbuf_append(vb,".",1)) return adns_s_nomemory;
- }
- if (flags & pdf_quoteok) {
- if (!vbuf__append_quoted1035(vb,dgram+labstart,lablen))
- return adns_s_nomemory;
- } else {
- ch= dgram[labstart];
- if (!ctype_alpha(ch) && !ctype_digit(ch)) return adns_s_answerdomaininvalid;
- for (i= labstart+1; i<labstart+lablen; i++) {
- ch= dgram[i];
- if (ch != '-' && !ctype_alpha(ch) && !ctype_digit(ch))
- return adns_s_answerdomaininvalid;
- }
- if (!adns__vbuf_append(vb,dgram+labstart,lablen))
- return adns_s_nomemory;
- }
- }
- if (!adns__vbuf_append(vb,"",1)) return adns_s_nomemory;
- return adns_s_ok;
-}
-
-adns_status adns__findrr_anychk(adns_query qu, int serv,
- const byte *dgram, int dglen, int *cbyte_io,
- int *type_r, int *class_r, unsigned long *ttl_r,
- 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;
- int cbyte;
-
- int tmp, rdlen, mismatch;
- unsigned long ttl;
- int lablen, labstart, ch;
- int eo_lablen, eo_labstart, eo_ch;
- adns_status st;
-
- cbyte= *cbyte_io;
-
- 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_dgram,eo_dglen,eo_dglen,eo_cbyte,0);
- mismatch= 0;
- } else {
- mismatch= 1;
- }
-
- for (;;) {
- st= adns__findlabel_next(&fls,&lablen,&labstart);
- if (st) return st;
- if (lablen<0) goto x_truncated;
-
- if (!mismatch) {
- 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) {
- 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 (!lablen) break;
- }
- if (eo_matched_r) *eo_matched_r= !mismatch;
-
- if (cbyte+10>dglen) goto x_truncated;
- GET_W(cbyte,tmp); *type_r= tmp;
- GET_W(cbyte,tmp); *class_r= tmp;
-
- GET_L(cbyte,ttl);
- if (ttl > MAXTTLBELIEVE) ttl= MAXTTLBELIEVE;
- *ttl_r= ttl;
-
- GET_W(cbyte,rdlen); if (rdlen_r) *rdlen_r= rdlen;
- if (rdstart_r) *rdstart_r= cbyte;
- cbyte+= rdlen;
- if (cbyte>dglen) goto x_truncated;
- *cbyte_io= cbyte;
- return adns_s_ok;
-
- x_truncated:
- *type_r= -1;
- return 0;
-}
-
-adns_status adns__findrr(adns_query qu, int serv,
- const byte *dgram, int dglen, int *cbyte_io,
- int *type_r, int *class_r, unsigned long *ttl_r,
- int *rdlen_r, int *rdstart_r,
- int *ownermatchedquery_r) {
- if (!ownermatchedquery_r) {
- return adns__findrr_anychk(qu,serv,
- dgram,dglen,cbyte_io,
- type_r,class_r,ttl_r,rdlen_r,rdstart_r,
- 0,0,0, 0);
- } else if (!qu->cname_dgram) {
- return adns__findrr_anychk(qu,serv,
- dgram,dglen,cbyte_io,
- type_r,class_r,ttl_r,rdlen_r,rdstart_r,
- qu->query_dgram,qu->query_dglen,DNS_HDRSIZE,
- ownermatchedquery_r);
- } else {
- return adns__findrr_anychk(qu,serv,
- dgram,dglen,cbyte_io,
- type_r,class_r,ttl_r,rdlen_r,rdstart_r,
- qu->cname_dgram,qu->cname_dglen,qu->cname_begin,
- ownermatchedquery_r);
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 03:23:50 +0000