X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=src%2Freply.c;h=ab7c8ff4aadbc37c6cdb589baf43b49aa384cc88;hb=c3ca23bb1821f820dfa889dc006599b5df8af32f;hp=3b46e21358490b5fbfd37e2bac03be697e0db9f0;hpb=828d89bd4196ad8ef825cdf2db26afe2eb797b69;p=adns.git

diff --git a/src/reply.c b/src/reply.c
index 3b46e21..ab7c8ff 100644
--- a/src/reply.c
+++ b/src/reply.c
@@ -3,7 +3,7 @@
  * - main handling and parsing routine for received datagrams
  */
 /*
- *  This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
+ *  This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
  *  
  *  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
@@ -32,13 +32,15 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
   int flg_ra, flg_rd, flg_tc, flg_qr, opcode;
   int rrtype, rrclass, rdlength, rdstart;
   int anstart, nsstart, arstart;
-  int ownermatched, l, nrrs, place;
+  int ownermatched, l, nrrs;
+  unsigned long ttl, soattl;
   const typeinfo *typei;
   adns_query qu, nqu;
   dns_rcode rcode;
   adns_status st;
   vbuf tempvb;
   byte *newquery, *rrsdata;
+  parseinfo pai;
   
   if (dglen<DNS_HDRSIZE) {
     adns__diag(ads,serv,0,"received datagram too short for message header (%d)",dglen);
@@ -99,6 +101,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     return;
   }
   anstart= qu->query_dglen;
+  arstart= -1;
 
   LIST_UNLINK(ads->timew,qu);
   /* We're definitely going to do something with this query now */
@@ -109,22 +112,22 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     break;
   case rcode_formaterror:
     adns__warn(ads,serv,qu,"server cannot understand our query (Format Error)");
-    adns__query_fail(qu,adns_s_serverfaulty);
+    adns__query_fail(qu,adns_s_rcodeformaterror);
     return;
   case rcode_servfail:
-    adns__query_fail(qu,adns_s_servfail);
+    adns__query_fail(qu,adns_s_rcodeservfail);
     return;
   case rcode_notimp:
     adns__warn(ads,serv,qu,"server claims not to implement our query");
-    adns__query_fail(qu,adns_s_notimplemented);
+    adns__query_fail(qu,adns_s_rcodenotimplemented);
     return;
   case rcode_refused:
     adns__warn(ads,serv,qu,"server refused our query");
-    adns__query_fail(qu,adns_s_refused);
+    adns__query_fail(qu,adns_s_rcoderefused);
     return;
   default:
     adns__warn(ads,serv,qu,"server gave unknown response code %d",rcode);
-    adns__query_fail(qu,adns_s_reasonunknown);
+    adns__query_fail(qu,adns_s_rcodeunknown);
     return;
   }
 
@@ -136,7 +139,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
   for (rri= 0; rri<ancount; rri++) {
     rrstart= cbyte;
     st= adns__findrr(qu,serv, dgram,dglen,&cbyte,
-		     &rrtype,&rrclass,&rdlength,&rdstart,
+		     &rrtype,&rrclass,&ttl, &rdlength,&rdstart,
 		     &ownermatched);
     if (st) { adns__query_fail(qu,st); return; }
     if (rrtype == -1) goto x_truncated;
@@ -153,9 +156,12 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
       }
       continue;
     }
-    if (rrtype == adns_r_cname && /* fixme - implement adns_qf_nocname */
+    if (rrtype == adns_r_cname &&
 	(qu->typei->type & adns__rrt_typemask) != adns_r_cname) {
-      if (!qu->cname_dgram) { /* Ignore second and subsequent CNAMEs */
+      if (qu->flags & adns_qf_cname_forbid) {
+	adns__query_fail(qu,adns_s_prohibitedcname);
+	return;
+      } else if (!qu->cname_dgram) { /* Ignore second and subsequent CNAMEs */
 	qu->cname_begin= rdstart;
 	qu->cname_dglen= dglen;
 	st= adns__parse_domain(ads,serv,qu, &qu->vb,
@@ -165,13 +171,14 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
 	if (st) { adns__query_fail(qu,st); return; }
 	l= strlen(qu->vb.buf)+1;
 	qu->answer->cname= adns__alloc_interim(qu,l);
-	if (!qu->answer->cname) { adns__query_fail(qu,adns_s_nolocalmem); return; }
+	if (!qu->answer->cname) { adns__query_fail(qu,adns_s_nomemory); return; }
 
 	qu->cname_dgram= adns__alloc_mine(qu,dglen);
 	memcpy(qu->cname_dgram,dgram,dglen);
 
 	memcpy(qu->answer->cname,qu->vb.buf,l);
 	cname_here= 1;
+	adns__update_expires(qu,ttl,now);
 	/* If we find the answer section truncated after this point we restart
 	 * the query at the CNAME; if beforehand then we obviously have to use
 	 * TCP.  If there is no truncation we can use the whole answer if
@@ -198,18 +205,13 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
 
   if (!wantedrrs) {
     /* Oops, NODATA or NXDOMAIN or perhaps a referral (which would be a problem) */
-    
-    if (rcode == rcode_nxdomain) {
-      adns__query_fail(qu,adns_s_nxdomain);
-      return;
-    }
 
     /* RFC2308: NODATA has _either_ a SOA _or_ _no_ NS records in authority section */
-    foundsoa= 0; foundns= 0;
+    foundsoa= 0; soattl= 0; foundns= 0;
     for (rri= 0; rri<nscount; rri++) {
       rrstart= cbyte;
       st= adns__findrr(qu,serv, dgram,dglen,&cbyte,
-		       &rrtype,&rrclass,&rdlength,&rdstart, 0);
+		       &rrtype,&rrclass,&ttl, &rdlength,&rdstart, 0);
       if (st) { adns__query_fail(qu,st); return; }
       if (rrtype==-1) goto x_truncated;
       if (rrclass != DNS_CLASS_IN) {
@@ -218,12 +220,25 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
 		   rrclass,DNS_CLASS_IN);
 	continue;
       }
-      if (rrtype == adns_r_soa_raw) { foundsoa= 1; break; }
+      if (rrtype == adns_r_soa_raw) { foundsoa= 1; soattl= ttl; break; }
       else if (rrtype == adns_r_ns_raw) { foundns= 1; }
     }
+    
+    if (rcode == rcode_nxdomain) {
+      /* We still wanted to look for the SOA so we could find the TTL. */
+      adns__update_expires(qu,soattl,now);
+
+      if (qu->flags & adns_qf_search) {
+	adns__search_next(ads,qu,now);
+      } else {
+	adns__query_fail(qu,adns_s_nxdomain);
+      }
+      return;
+    }
 
     if (foundsoa || !foundns) {
       /* Aha !  A NODATA response, good. */
+      adns__update_expires(qu,soattl,now);
       adns__query_fail(qu,adns_s_nodata);
       return;
     }
@@ -244,7 +259,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
       adns__query_fail(qu,adns_s_norecurse);
     } else {
       adns__diag(ads,serv,qu,"server claims to do recursion, but gave us a referral");
-      adns__query_fail(qu,adns_s_serverfaulty);
+      adns__query_fail(qu,adns_s_invalidresponse);
     }
     return;
   }
@@ -252,48 +267,35 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
   /* Now, we have some RRs which we wanted. */
 
   qu->answer->rrs.untyped= adns__alloc_interim(qu,qu->typei->rrsz*wantedrrs);
-  if (!qu->answer->rrs.untyped) { adns__query_fail(qu,adns_s_nolocalmem); return; }
+  if (!qu->answer->rrs.untyped) { adns__query_fail(qu,adns_s_nomemory); return; }
 
   typei= qu->typei;
   cbyte= anstart;
-  arstart= -1;
   rrsdata= qu->answer->rrs.bytes;
-  
-  if (typei->diff_needswap) {
-    if (!adns__vbuf_ensure(&qu->vb,typei->rrsz)) {
-      adns__query_fail(qu,adns_s_nolocalmem);
-      return;
-    }
-  }
-  nrrs= 0;
-  
-  for (rri=0; rri<ancount; rri++) {
+
+  pai.ads= qu->ads;
+  pai.qu= qu;
+  pai.serv= serv;
+  pai.dgram= dgram;
+  pai.dglen= dglen;
+  pai.nsstart= nsstart;
+  pai.nscount= nscount;
+  pai.arcount= arcount;
+  pai.now= now;
+
+  for (rri=0, nrrs=0; rri<ancount; rri++) {
     st= adns__findrr(qu,serv, dgram,dglen,&cbyte,
-		     &rrtype,&rrclass,&rdlength,&rdstart,
+		     &rrtype,&rrclass,&ttl, &rdlength,&rdstart,
 		     &ownermatched);
     assert(!st); assert(rrtype != -1);
     if (rrclass != DNS_CLASS_IN ||
 	rrtype != (qu->typei->type & adns__rrt_typemask) ||
 	!ownermatched)
       continue;
-    st= typei->parse(qu,serv, dgram,dglen, rdstart,rdstart+rdlength,
-		     rrsdata+nrrs*typei->rrsz);
+    adns__update_expires(qu,ttl,now);
+    st= typei->parse(&pai, rdstart,rdstart+rdlength, rrsdata+nrrs*typei->rrsz);
     if (st) { adns__query_fail(qu,st); return; }
     if (rdstart==-1) goto x_truncated;
-
-    if (typei->diff_needswap) {
-      for (place= nrrs;
-	   place>0 && typei->diff_needswap(rrsdata+(place-1)*typei->rrsz,
-					   rrsdata+nrrs*typei->rrsz);
-	   place--);
-      if (place != nrrs) {
-	memcpy(qu->vb.buf,rrsdata+nrrs*typei->rrsz,typei->rrsz);
-	memmove(rrsdata+(place+1)*typei->rrsz,
-		rrsdata+place*typei->rrsz,
-		(nrrs-place)*typei->rrsz);
-	memcpy(rrsdata+place*typei->rrsz,qu->vb.buf,typei->rrsz);
-      }
-    }
     nrrs++;
   }
   assert(nrrs==wantedrrs);
@@ -313,7 +315,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
   
   if (!flg_tc) {
     adns__diag(ads,serv,qu,"server sent datagram which points outside itself");
-    adns__query_fail(qu,adns_s_serverfaulty);
+    adns__query_fail(qu,adns_s_invalidresponse);
     return;
   }
   qu->flags |= adns_qf_usevc;
@@ -327,7 +329,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     if (st) { adns__query_fail(qu,st); return; }
     
     newquery= realloc(qu->query_dgram,qu->vb.used);
-    if (!newquery) { adns__query_fail(qu,adns_s_nolocalmem); return; }
+    if (!newquery) { adns__query_fail(qu,adns_s_nomemory); return; }
     
     qu->query_dgram= newquery;
     qu->query_dglen= qu->vb.used;