X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fquery.c;h=799a318a84ea2edac73ddb2bd28e47eb5b42b3eb;hb=26e1c3d691b52d21a8bb52d9bf3f8e2b42ae6cfa;hp=a5882f3ec5f19c6b6994e7095750bd4afbe39a15;hpb=1382623344fca3a3bd55187ca031ab00c79adab0;p=adns.git

diff --git a/src/query.c b/src/query.c
index a5882f3..799a318 100644
--- a/src/query.c
+++ b/src/query.c
@@ -6,14 +6,14 @@
  */
 /*
  *  This file is part of adns, which is
- *    Copyright (C) 1997-2000,2003,2006  Ian Jackson
+ *    Copyright (C) 1997-2000,2003,2006,2014  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
- *  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,
@@ -22,8 +22,7 @@
  *  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"
@@ -111,9 +110,10 @@ static void query_submit(adns_state ads, adns_query qu,
 adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags,
 			       union checklabel_state *cls,
 			       qcontext *ctx, int labnum,
-			       const char *label, int lablen)
+			       const char *dgram, int labstart, int lablen)
 {
   int i, c;
+  const char *label = dgram+labstart;
 
   if (flags & adns_qf_quoteok_query) return adns_s_ok;
   for (i=0; i<lablen; i++) {
@@ -132,35 +132,38 @@ static adns_status check_domain_name(adns_state ads, adns_queryflags flags,
 				     const byte *dgram, int dglen)
 {
   findlabel_state fls;
-  adns_status err;
+  adns_status st;
   int labnum= 0, labstart, lablen;
   union checklabel_state cls;
 
   adns__findlabel_start(&fls,ads, -1,0, dgram,dglen,dglen, DNS_HDRSIZE,0);
   do {
-    err= adns__findlabel_next(&fls, &lablen,&labstart);
-    assert(!err); assert(lablen >= 0);
-    err= typei->checklabel(ads,flags, &cls,ctx,
-			   labnum++, dgram+labstart,lablen);
-    if (err) return err;
+    st= adns__findlabel_next(&fls, &lablen,&labstart);
+    assert(!st); assert(lablen >= 0);
+    st= typei->checklabel(ads,flags, &cls,ctx,
+			   labnum++, dgram,labstart,lablen);
+    if (st) return st;
   } while (lablen);
   return adns_s_ok;
 }
 
 adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
+				  adns_query parent,
 				  const typeinfo *typei, adns_rrtype type,
 				  vbuf *qumsg_vb, int id,
 				  adns_queryflags flags, struct timeval now,
 				  qcontext *ctx) {
   adns_query qu;
-  adns_status err;
+  adns_status st;
 
-  err= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used);
-  if (err) goto x_err;
+  st= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used);
+  if (st) goto x_err;
   qu= query_alloc(ads,typei,type,flags,now);
-  if (!qu) { err = adns_s_nomemory; goto x_err; }
+  if (!qu) { st = adns_s_nomemory; goto x_err; }
   *query_r= qu;
 
+  qu->parent= parent;
+  LIST_LINK_TAIL_PART(parent->children,qu,siblings.);
   memcpy(&qu->ctx,ctx,sizeof(qu->ctx));
   query_submit(ads,qu, typei,qumsg_vb,id,flags,now);
   
@@ -168,7 +171,7 @@ adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
 
 x_err:
   adns__vbuf_free(qumsg_vb);
-  return err;
+  return st;
 }
 
 static void query_simple(adns_state ads, adns_query qu,
@@ -177,22 +180,22 @@ static void query_simple(adns_state ads, adns_query qu,
 			 struct timeval now) {
   vbuf vb_new;
   int id;
-  adns_status stat;
+  adns_status st;
 
-  stat= adns__mkquery(ads,&qu->vb,&id, owner,ol,
+  st= adns__mkquery(ads,&qu->vb,&id, owner,ol,
 		      typei,qu->answer->type, flags);
-  if (stat) {
-    if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) {
+  if (st) {
+    if (st == adns_s_querydomaintoolong && (flags & adns_qf_search)) {
       adns__search_next(ads,qu,now);
       return;
     } else {
-      adns__query_fail(qu,stat);
+      adns__query_fail(qu,st);
       return;
     }
   }
 
-  stat= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used);
-  if (stat) { adns__query_fail(qu,stat); return; }
+  st= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used);
+  if (st) { adns__query_fail(qu,st); return; }
 
   vb_new= qu->vb;
   adns__vbuf_init(&qu->vb);
@@ -201,7 +204,7 @@ static void query_simple(adns_state ads, adns_query qu,
 
 void adns__search_next(adns_state ads, adns_query qu, struct timeval now) {
   const char *nextentry;
-  adns_status stat;
+  adns_status st;
   
   if (qu->search_doneabs<0) {
     nextentry= 0;
@@ -210,7 +213,7 @@ void adns__search_next(adns_state ads, adns_query qu, struct timeval now) {
     if (qu->search_pos >= ads->nsearchlist) {
       if (qu->search_doneabs) {
 	qu->search_vb.used= qu->search_origlen;
-	stat= adns_s_nxdomain; goto x_fail;
+	st= adns_s_nxdomain; goto x_fail;
       } else {
 	nextentry= 0;
 	qu->search_doneabs= 1;
@@ -235,9 +238,9 @@ void adns__search_next(adns_state ads, adns_query qu, struct timeval now) {
   return;
 
 x_nomemory:
-  stat= adns_s_nomemory;
+  st= adns_s_nomemory;
 x_fail:
-  adns__query_fail(qu,stat);
+  adns__query_fail(qu,st);
 }
 
 static int save_owner(adns_query qu, const char *owner, int ol) {
@@ -263,7 +266,7 @@ int adns_submit(adns_state ads,
 		void *context,
 		adns_query *query_r) {
   int r, ol, ndots;
-  adns_status stat;
+  adns_status st;
   const typeinfo *typei;
   struct timeval now;
   adns_query qu;
@@ -285,8 +288,8 @@ int adns_submit(adns_state ads,
   *query_r= qu;
 
   ol= strlen(owner);
-  if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; }
-  if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; }
+  if (!ol) { st= adns_s_querydomaininvalid; goto x_adnsfail; }
+  if (ol>DNS_MAXDOMAIN+1) { st= adns_s_querydomaintoolong; goto x_adnsfail; }
 				 
   if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) {
     flags &= ~adns_qf_search;
@@ -296,7 +299,7 @@ int adns_submit(adns_state ads,
 
   if (flags & adns_qf_search) {
     r= adns__vbuf_append(&qu->search_vb,owner,ol);
-    if (!r) { stat= adns_s_nomemory; goto x_adnsfail; }
+    if (!r) { st= adns_s_nomemory; goto x_adnsfail; }
 
     for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++);
     qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0;
@@ -304,23 +307,23 @@ int adns_submit(adns_state ads,
     adns__search_next(ads,qu,now);
   } else {
     if (flags & adns_qf_owner) {
-      if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; }
+      if (!save_owner(qu,owner,ol)) { st= adns_s_nomemory; goto x_adnsfail; }
     }
     query_simple(ads,qu, owner,ol, typei,flags, now);
   }
   adns__autosys(ads,now);
-  adns__consistency(ads,qu,cc_entex);
+  adns__returning(ads,qu);
   return 0;
 
  x_adnsfail:
-  adns__query_fail(qu,stat);
-  adns__consistency(ads,qu,cc_entex);
+  adns__query_fail(qu,st);
+  adns__returning(ads,qu);
   return 0;
 
  x_errno:
   r= errno;
   assert(r);
-  adns__consistency(ads,0,cc_entex);
+  adns__returning(ads,0);
   return r;
 }
 
@@ -406,7 +409,7 @@ void *adns__alloc_preserved(adns_query qu, size_t sz) {
   return rv;
 }
 
-static allocnode *alloc_info(adns_query qu, void *p, size_t *sz_r) {
+static allocnode *alloc__info(adns_query qu, void *p, size_t *sz_r) {
   allocnode *an;
 
   if (!p || p == qu) { *sz_r= 0; return 0; }
@@ -417,13 +420,14 @@ static allocnode *alloc_info(adns_query qu, void *p, size_t *sz_r) {
 
 void adns__free_interim(adns_query qu, void *p) {
   size_t sz;
-  allocnode *an= alloc_info(qu, p, &sz);
+  allocnode *an= alloc__info(qu, p, &sz);
 
   if (!an) return;
   assert(!qu->final_allocspace);
   LIST_UNLINK(qu->allocations, an);
   free(an);
   qu->interim_allocd -= sz;
+  assert(!qu->interim_allocd >= 0);
 }
 
 void *adns__alloc_mine(adns_query qu, size_t sz) {
@@ -432,7 +436,7 @@ void *adns__alloc_mine(adns_query qu, size_t sz) {
 
 void adns__transfer_interim(adns_query from, adns_query to, void *block) {
   size_t sz;
-  allocnode *an= alloc_info(from, block, &sz);
+  allocnode *an= alloc__info(from, block, &sz);
 
   if (!an) return;
 
@@ -469,7 +473,7 @@ void adns__cancel_children(adns_query qu) {
 
   for (cqu= qu->children.head; cqu; cqu= ncqu) {
     ncqu= cqu->siblings.next;
-    adns_cancel(cqu);
+    adns__cancel(cqu);
   }
 }
 
@@ -493,11 +497,26 @@ static void free_query_allocs(adns_query qu) {
   qu->query_dgram= 0;
 }
 
-void adns_cancel(adns_query qu) {
+void adns__returning(adns_state ads, adns_query qu_for_caller) {
+  while (ads->intdone.head) {
+    adns_query iq= ads->intdone.head;
+    adns_query parent= iq->parent;
+    LIST_UNLINK_PART(parent->children,iq,siblings.);
+    LIST_UNLINK(iq->ads->childw,parent);
+    LIST_UNLINK(ads->intdone,iq);
+    iq->ctx.callback(parent,iq);
+    free_query_allocs(iq);
+    free(iq->answer);
+    free(iq);
+  }
+  adns__consistency(ads,qu_for_caller,cc_entex);
+}
+
+void adns__cancel(adns_query qu) {
   adns_state ads;
 
   ads= qu->ads;
-  adns__consistency(ads,qu,cc_entex);
+  adns__consistency(ads,qu,cc_freq);
   if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.);
   switch (qu->state) {
   case query_tosend:
@@ -510,7 +529,10 @@ void adns_cancel(adns_query qu) {
     LIST_UNLINK(ads->childw,qu);
     break;
   case query_done:
-    LIST_UNLINK(ads->output,qu);
+    if (qu->parent)
+      LIST_UNLINK(ads->intdone,qu);
+    else
+      LIST_UNLINK(ads->output,qu);
     break;
   default:
     abort();
@@ -518,7 +540,16 @@ void adns_cancel(adns_query qu) {
   free_query_allocs(qu);
   free(qu->answer);
   free(qu);
-  adns__consistency(ads,0,cc_entex);
+}
+
+void adns_cancel(adns_query qu) {
+  adns_state ads;
+
+  assert(!qu->parent);
+  ads= qu->ads;
+  adns__consistency(ads,qu,cc_entex);
+  adns__cancel(qu);
+  adns__returning(ads,0);
 }
 
 void adns__update_expires(adns_query qu, unsigned long ttl,
@@ -569,8 +600,8 @@ static void makefinal_query(adns_query qu) {
 }
 
 void adns__query_done(adns_query qu) {
+  adns_state ads=qu->ads;
   adns_answer *ans;
-  adns_query parent;
 
   adns__cancel_children(qu);
 
@@ -601,24 +632,18 @@ void adns__query_done(adns_query qu) {
   }
 
   ans->expires= qu->expires;
-  parent= qu->parent;
-  if (parent) {
-    LIST_UNLINK_PART(parent->children,qu,siblings.);
-    LIST_UNLINK(qu->ads->childw,parent);
-    qu->ctx.callback(parent,qu);
-    free_query_allocs(qu);
-    free(qu->answer);
-    free(qu);
+  qu->state= query_done;
+  if (qu->parent) {
+    LIST_LINK_TAIL(ads->intdone,qu);
   } else {
     makefinal_query(qu);
     LIST_LINK_TAIL(qu->ads->output,qu);
-    qu->state= query_done;
   }
 }
 
-void adns__query_fail(adns_query qu, adns_status stat) {
+void adns__query_fail(adns_query qu, adns_status st) {
   adns__reset_preserved(qu);
-  qu->answer->status= stat;
+  qu->answer->status= st;
   adns__query_done(qu);
 }