chiark / gitweb /
Compiles but does not link.
[adns.git] / src / reply.c
index 337d3f8..2317954 100644 (file)
 
 #include "internal.h"
 
-static void cname_recurse(adns_state ads, adns_query qu, adns_queryflags xflags) {
+static void cname_recurse(adns_query qu, adns_queryflags xflags) {
   abort(); /* FIXME */
 }
     
 void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
                     int serv, struct timeval now) {
   int cbyte, rrstart, wantedrrs, rri, foundsoa, foundns;
-  int id, f1, f2, qdcount, ancount, nscount, arcount, flg_ra, flg_rd, flg_tc, opcode;
-  int rrtype, rrclass, rdlength, rdstart, ownermatched, ownerstart;
+  int id, f1, f2, qdcount, ancount, nscount, arcount;
+  int flg_ra, flg_rd, flg_tc, flg_qr, opcode;
+  int rrtype, rrclass, rdlength, rdstart, ownermatched, l;
   int anstart, nsstart, arstart;
-  int currentrrs;
   adns_query qu, nqu;
   dns_rcode rcode;
   adns_status st;
   
   if (dglen<DNS_HDRSIZE) {
-    adns__diag(ads,serv,"received datagram too short for message header (%d)",dglen);
+    adns__diag(ads,serv,0,"received datagram too short for message header (%d)",dglen);
     return;
   }
   GET_W(cbyte,id);
@@ -58,33 +58,34 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
   rcode= (f1&0x0f);
 
   if (flg_qr) {
-    adns__diag(ads,serv,"server sent us a query, not a response");
+    adns__diag(ads,serv,0,"server sent us a query, not a response");
     return;
   }
   if (opcode) {
-    adns__diag(ads,serv,"server sent us unknown opcode %d (wanted 0=QUERY)",opcode);
+    adns__diag(ads,serv,0,"server sent us unknown opcode %d (wanted 0=QUERY)",opcode);
     return;
   }
   if (!qdcount) {
-    adns__diag(ads,serv,"server sent reply without quoting our question");
+    adns__diag(ads,serv,0,"server sent reply without quoting our question");
     return;
   } else if (qdcount>1) {
-    adns__diag(ads,serv,"server claimed to answer %d questions with one message",
+    adns__diag(ads,serv,0,"server claimed to answer %d questions with one message",
               qdcount);
     return;
   }
   for (qu= ads->timew.head; qu; qu= nqu) {
     nqu= qu->next;
     if (qu->id != id) continue;
-    if (dglen < qu->querylen) continue;
-    if (memcmp(qu->querymsg+DNS_HDRSIZE,dgram+DNS_HDRSIZE,qu->querylen-DNS_HDRSIZE))
+    if (dglen < qu->query_dglen) continue;
+    if (memcmp(qu->query_dgram+DNS_HDRSIZE,
+              dgram+DNS_HDRSIZE,
+              qu->query_dglen-DNS_HDRSIZE))
       continue;
     break;
   }
-  assert(qu->cnameoff == -1);
-  anstart= qu->querylen;
+  anstart= qu->query_dglen;
   if (!qu) {
-    adns__debug(ads,serv,"reply not found (id=%02x)",id);
+    adns__debug(ads,serv,0,"reply not found (id=%02x)",id);
     return;
   }
 
@@ -97,22 +98,22 @@ 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(ads,qu,adns_s_serverfaulty);
+    adns__query_fail(qu,adns_s_serverfaulty);
     return;
   case rcode_servfail:
-    adns__query_fail(ads,qu,adns_s_servfail);
+    adns__query_fail(qu,adns_s_servfail);
     return;
   case rcode_notimp:
     adns__warn(ads,serv,qu,"server claims not to implement our query");
-    adns__query_fail(ads,qu,adns_s_notimplemented);
+    adns__query_fail(qu,adns_s_notimplemented);
     return;
   case rcode_refused:
     adns__warn(ads,serv,qu,"server refused our query");
-    adns__query_fail(ads,qu,adns_s_refused);
+    adns__query_fail(qu,adns_s_refused);
     return;
   default:
     adns__warn(ads,serv,qu,"server gave unknown response code %d",rcode);
-    adns__query_fail(ads,qu,adns_s_reasonunknown);
+    adns__query_fail(qu,adns_s_reasonunknown);
     return;
   }
 
@@ -122,16 +123,10 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
   wantedrrs= 0;
   for (rri= 0; rri<ancount; rri++) {
     rrstart= cbyte;
-    if (qu->cname_dgram >= 0) {
-      st= adns__findrr(ads,serv, dgram,dglen,&cbyte,
-                      &rrtype,&rrclass,&rdlength,&rdstart,
-                      qu->cname_dgram,qu->cname_dglen,qu->cname_begin, &ownermatched);
-    } else {
-      st= adns__findrr(ads,serv, dgram,dglen,&cbyte,
-                      &rrtype,&rrclass,&rdlength,&rdstart,
-                      qu->querymsg,qu->querylen,DNS_HDRSIZE, &ownermatched);
-    }
-    if (st) adns__query_fail(ads,qu,st);
+    st= adns__findrr(qu,serv, dgram,dglen,&cbyte,
+                    &rrtype,&rrclass,&rdlength,&rdstart,
+                    &ownermatched);
+    if (st) adns__query_fail(qu,st);
     if (rrtype == -1) goto x_truncated;
 
     if (rrclass != DNS_CLASS_IN) {
@@ -142,23 +137,26 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     if (!ownermatched) {
       if (ads->iflags & adns_if_debug) {
        adns__debug(ads,serv,qu,"ignoring RR with an unexpected owner %s",
-                   adns__diag_domain(ads,serv,&qu->vb,qu->flags,
-                                     dgram,dglen,rrstart,dglen));
+                   adns__diag_domain(ads,serv,qu, &qu->vb,qu->flags,
+                                     dgram,dglen,rrstart));
       }
       continue;
     }
     if (rrtype == adns_r_cname &&
        (qu->typei->type & adns__rrt_typemask) != adns_r_cname) {
-      if (!qu->cname_str) { /* Ignore second and subsequent CNAMEs */
+      if (!qu->cname_dgram) { /* Ignore second and subsequent CNAMEs */
+       qu->cname_dgram= adns__alloc_mine(qu,dglen);
+       if (!qu->cname_dgram) return;
        qu->cname_begin= rdstart;
-       qu->cname_dgram= dgram;
        qu->cname_dglen= dglen;
-       st= adns__parse_domain(ads,serv,&qu->vb,qu->flags,
+       st= adns__parse_domain(ads,serv,qu, &qu->vb,qu->flags,
                               dgram,dglen, &rdstart,rdstart+rdlength);
-       if (!vb.used) goto x_truncated;
-       if (st) { adns__query_fail(ads,qu,st); return; }
-       qu->answer->cname= adns__savestring(qu);
+       if (!qu->vb.used) goto x_truncated;
+       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) return;
+       memcpy(qu->answer->cname,qu->vb.buf,l);
        /* 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
@@ -166,9 +164,9 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
         */
       } else {
        adns__debug(ads,serv,qu,"ignoring duplicate CNAME (%s, as well as %s)",
-                   adns__diag_domain(ads,serv,&qu->vb,qu->flags,
-                                     dgram,dglen, rdstart,rdstart+rdlength),
-                   qu->cname_str);
+                   adns__diag_domain(ads,serv,qu, &qu->vb,qu->flags,
+                                     dgram,dglen,rdstart),
+                   qu->answer->cname);
       }
     } else if (rrtype == (qu->typei->type & adns__rrt_typemask)) {
       wantedrrs++;
@@ -184,7 +182,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     /* Oops, NODATA or NXDOMAIN or perhaps a referral (which would be a problem) */
     
     if (rcode == rcode_nxdomain) {
-      adns__query_finish(ads,qu,adns_s_nxdomain);
+      adns__query_fail(qu,adns_s_nxdomain);
       return;
     }
 
@@ -192,10 +190,9 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     foundsoa= 0; foundns= 0;
     for (rri= 0; rri<nscount; rri++) {
       rrstart= cbyte;
-      st= adns__findrr(ads,serv, dgram,dglen,&cbyte,
-                      &rrtype,&rrclass,&rdlength,&rdstart,
-                      0,0,0,0);
-      if (st) { adns__query_fail(ads,qu,st); return; }
+      st= adns__findrr(qu,serv, dgram,dglen,&cbyte,
+                      &rrtype,&rrclass,&rdlength,&rdstart, 0);
+      if (st) { adns__query_fail(qu,st); return; }
       if (rrtype==-1) goto x_truncated;
       if (rrclass != DNS_CLASS_IN) {
        adns__diag(ads,serv,qu,
@@ -209,7 +206,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
 
     if (foundsoa || !foundns) {
       /* Aha !  A NODATA response, good. */
-      adns__query_finish(ads,qu,adns_s_nodata);
+      adns__query_fail(qu,adns_s_nodata);
       return;
     }
 
@@ -218,7 +215,7 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
      * a CNAME in this datagram then we should probably do our own CNAME
      * lookup now in the hope that we won't get a referral again.
      */
-    if (qu->cname_dgram == dgram) { cname_recurse(ads,qu,0); return; }
+    if (qu->cname_dgram == dgram) { cname_recurse(qu,0); return; }
 
     /* Bloody hell, I thought we asked for recursion ? */
     if (flg_rd) {
@@ -226,41 +223,35 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     }
     if (!flg_ra) {
       adns__diag(ads,serv,qu,"server is not willing to do recursive lookups for us");
-      adns__query_fail(ads,qu,adns_s_norecurse);
+      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(ads,qu,adns_s_serverfaulty);
+      adns__query_fail(qu,adns_s_serverfaulty);
     }
     return;
   }
 
   /* Now, we have some RRs which we wanted. */
 
-  qu->ans->rrs= adns__alloc_interim(qu,qu->typei->rrsz*wantedrrs);
-  if (!qu->ans->rrs) return;
+  qu->answer->rrs.untyped= adns__alloc_interim(qu,qu->typei->rrsz*wantedrrs);
+  if (!qu->answer->rrs.untyped) return;
 
   cbyte= anstart;
   arstart= -1;
   for (rri=0; rri<ancount; rri++) {
-    if (qu->cname_dgram >= 0) {
-      st= adns__findrr(ads,serv, dgram,dglen,&cbyte,
-                      &rrtype,&rrclass,&rdlength,&rdstart,
-                      qu->cname_dgram,qu->cname_dglen,qu->cname_begin, &ownermatched);
-    } else {
-      st= adns__findrr(ads,serv, dgram,dglen,&cbyte,
-                      &rrtype,&rrclass,&rdlength,&rdstart,
-                      qu->querymsg,qu->querylen,DNS_HDRSIZE, &ownermatched);
-    }
+    st= adns__findrr(qu,serv, dgram,dglen,&cbyte,
+                    &rrtype,&rrclass,&rdlength,&rdstart,
+                    &ownermatched);
     assert(!st); assert(rrtype != -1);
     if (rrclass != DNS_CLASS_IN ||
        rrtype != (qu->typei->type & adns__rrt_typemask) ||
        !ownermatched)
       continue;
-    assert(qu->ans->nrrs<wantedrrs);
-    st= qu->typei->parse(ads,qu,serv,
-                        dgram,dglen, &rdstart,rdstart+rdlength,
-                        qu->ans->rrs.bytes+qu->ans->nrrs*quj->typei->rrsz);
-    if (st) { adns__query_fail(ads,qu,st); return; }
+    assert(qu->answer->nrrs<wantedrrs);
+    st= qu->typei->parse(qu,serv,
+                        dgram,dglen, rdstart,rdstart+rdlength,
+                        qu->answer->rrs.bytes+qu->answer->nrrs*qu->typei->rrsz);
+    if (st) { adns__query_fail(qu,st); return; }
     if (rdstart==-1) goto x_truncated;
   }
 
@@ -271,17 +262,17 @@ void adns__procdgram(adns_state ads, const byte *dgram, int dglen,
     return;
   }
 
-  adns__query_finish(ads,qu,adns_s_ok);
+  adns__query_done(qu);
   return;
 
  x_truncated:
   if (!flg_tc) {
     adns__diag(ads,serv,qu,"server sent datagram which points outside itself");
-    adns__query_fail(ads,qu,adns_s_serverfaulty);
+    adns__query_fail(qu,adns_s_serverfaulty);
     return;
   }
-  if (qu->cname_dgram) { cname_recurse(ads,qu,adns_qf_usevc); return; }
-  adns__reset_cnameonly(ads,qu);
+  if (qu->cname_dgram) { cname_recurse(qu,adns_qf_usevc); return; }
+  adns__reset_cnameonly(qu);
   qu->flags |= adns_qf_usevc;
-  adns__query_udp(ads,qu,now);
+  adns__query_udp(qu,now);
 }