X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fparse.c;h=caedf158dcf02bec1efad545ba5b862177801e90;hb=a7f55cc47fd1a8c9d6e9e5eea2fc4184bfe7ad1c;hp=73f53f79f5a8b7ae80ac2807e572a893ecea9355;hpb=bef232aebeabbef525faa7d7f5b08cf7a1427f95;p=adns.git diff --git a/src/parse.c b/src/parse.c index 73f53f7..caedf15 100644 --- a/src/parse.c +++ b/src/parse.c @@ -3,16 +3,16 @@ * - parsing assistance functions (mainly for domains inside datagrams) */ /* - * This file is - * Copyright (C) 1997-2000 Ian Jackson - * - * It is part of adns, which is - * Copyright (C) 1997-2000 Ian Jackson - * Copyright (C) 1999-2000 Tony Finch + * This file is part of adns, which is + * Copyright (C) 1997-2000,2003,2006,2014 Ian Jackson + * Copyright (C) 2014 Mark Wooding + * 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 - * the Free Software Foundation; either version 2, or (at your option) + * the Free Software Foundation; either version 3, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, @@ -21,13 +21,12 @@ * 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. + * along with this program; if not, write to the Free Software Foundation. */ #include "internal.h" -int vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len) { +static int vbuf_append_quoted1035(vbuf *vb, const byte *buf, int len) { char qbuf[10]; int i, ch; @@ -43,7 +42,8 @@ int vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len) { break; } } - if (!adns__vbuf_append(vb,buf,i) || !adns__vbuf_append(vb,qbuf,strlen(qbuf))) + if (!adns__vbuf_append(vb,buf,i) || + !adns__vbuf_append(vb,qbuf,strlen(qbuf))) return 0; if (iads,fls->serv,fls->qu,"label in domain runs beyond end of domain"); + 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) { + vbuf *vb, parsedomain_flags 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); + 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, + adns_query qu, vbuf *vb, + parsedomain_flags flags, const byte *dgram) { int lablen, labstart, i, ch, first; adns_status st; @@ -138,11 +142,12 @@ adns_status adns__parse_domain_more(findlabel_state *fls, adns_state ads, if (!adns__vbuf_append(vb,".",1)) return adns_s_nomemory; } if (flags & pdf_quoteok) { - if (!vbuf__append_quoted1035(vb,dgram+labstart,lablen)) + 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; + if (!ctype_alpha(ch) && !ctype_digit(ch)) + return adns_s_answerdomaininvalid; for (i= labstart+1; i 0) { + int ac= ctype_toupper(*a++); + int bc= ctype_toupper(*b++); + if (ac != bc) return 0; + } + return 1; +} + 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 *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; + const byte *eo_dgram, int eo_dglen, + int eo_cbyte, int *eo_matched_r) { + 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; + int lablen, labstart; + int eo_lablen, eo_labstart; 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; + eo_fls= &eo_fls_buf; + adns__findlabel_start(eo_fls,qu->ads, -1,0, + eo_dgram,eo_dglen,eo_dglen,eo_cbyte,0); } else { - mismatch= 1; + eo_fls= 0; } for (;;) { @@ -186,19 +204,16 @@ adns_status adns__findrr_anychk(adns_query qu, int serv, 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) { - 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 (!adns__labels_equal(dgram+labstart, lablen, + eo_dgram+eo_labstart, eo_lablen)) + 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;