* - query submission and cancellation (user-visible and internal)
*/
/*
- * This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
+ * This file is
+ * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ * It is part of adns, which is
+ * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
+ * Copyright (C) 1999-2000 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
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
-#include <string.h>
#include <sys/time.h>
adns_query qu;
qu= malloc(sizeof(*qu)); if (!qu) return 0;
- qu->answer= malloc(sizeof(*qu->answer)); if (!qu->answer) { free(qu); return 0; }
+ qu->answer= malloc(sizeof(*qu->answer));
+ if (!qu->answer) { free(qu); return 0; }
qu->ads= ads;
- qu->state= query_udp;
+ qu->state= query_tosend;
qu->back= qu->next= qu->parent= 0;
LIST_INIT(qu->children);
LINK_INIT(qu->siblings);
LIST_INIT(qu->allocations);
qu->interim_allocd= 0;
+ qu->preserved_allocd= 0;
qu->final_allocspace= 0;
qu->typei= typei;
adns__vbuf_init(&qu->search_vb);
qu->search_origlen= qu->search_pos= qu->search_doneabs= 0;
- qu->id= 0;
+ qu->id= -2; /* will be overwritten with real id before we leave adns */
qu->flags= flags;
- qu->udpretries= 0;
+ qu->retries= 0;
qu->udpnextserver= 0;
- qu->udpsent= qu->tcpfailed= 0;
+ qu->udpsent= 0;
timerclear(&qu->timeout);
qu->expires= now.tv_sec + MAXTTLBELIEVE;
memset(&qu->ctx,0,sizeof(qu->ctx));
qu->answer->status= adns_s_ok;
- qu->answer->cname= 0;
+ qu->answer->cname= qu->answer->owner= 0;
qu->answer->type= typei->type;
qu->answer->expires= -1;
qu->answer->nrrs= 0;
- qu->answer->rrs= 0;
+ qu->answer->rrs.untyped= 0;
qu->answer->rrsz= typei->rrsz;
return qu;
const typeinfo *typei, vbuf *qumsg_vb, int id,
adns_queryflags flags, struct timeval now) {
/* Fills in the query message in for a previously-allocated query,
- * and submits it. Cannot fail.
+ * and submits it. Cannot fail. Takes over the memory for qumsg_vb.
*/
qu->vb= *qumsg_vb;
qu->query_dglen= qu->vb.used;
memcpy(qu->query_dgram,qu->vb.buf,qu->vb.used);
- adns__query_udp(qu,now);
- adns__autosys(ads,now);
+ adns__query_send(qu,now);
}
adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
- const typeinfo *typei, vbuf *qumsg_vb, int id,
+ const typeinfo *typei, vbuf *qumsg_vb,
+ int id,
adns_queryflags flags, struct timeval now,
const qcontext *ctx) {
adns_query qu;
const char *owner, int ol,
const typeinfo *typei, adns_queryflags flags,
struct timeval now) {
- vbuf vb;
+ vbuf vb_new;
int id;
adns_status stat;
- adns__vbuf_init(&vb);
-
- stat= adns__mkquery(ads,&vb,&id, owner,ol, typei,flags);
- if (stat) { adns__query_fail(qu,stat); return; }
+ stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, typei,flags);
+ if (stat) {
+ if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) {
+ adns__search_next(ads,qu,now);
+ return;
+ } else {
+ adns__query_fail(qu,stat);
+ return;
+ }
+ }
- query_submit(ads,qu, typei,&vb,id, flags,now);
+ vb_new= qu->vb;
+ adns__vbuf_init(&qu->vb);
+ query_submit(ads,qu, typei,&vb_new,id, flags,now);
}
void adns__search_next(adns_state ads, adns_query qu, struct timeval now) {
} else {
if (qu->search_pos >= ads->nsearchlist) {
if (qu->search_doneabs) {
+ qu->search_vb.used= qu->search_origlen;
stat= adns_s_nxdomain; goto x_fail;
- return;
} else {
nextentry= 0;
qu->search_doneabs= 1;
qu->search_vb.used= qu->search_origlen;
if (nextentry) {
if (!adns__vbuf_append(&qu->search_vb,".",1) ||
- !adns__vbuf_appendstr(&qu->search_vb,nextentry)) {
- stat= adns_s_nomemory; goto x_fail;
- }
+ !adns__vbuf_appendstr(&qu->search_vb,nextentry))
+ goto x_nomemory;
}
free(qu->query_dgram);
qu->query_dgram= 0; qu->query_dglen= 0;
- query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, qu->typei, qu->flags, now);
+ query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used,
+ qu->typei, qu->flags, now);
return;
-
+
+x_nomemory:
+ stat= adns_s_nomemory;
x_fail:
adns__query_fail(qu,stat);
}
+static int save_owner(adns_query qu, const char *owner, int ol) {
+ /* Returns 1 if OK, otherwise there was no memory. */
+ adns_answer *ans;
+
+ if (!(qu->flags & adns_qf_owner)) return 1;
+
+ ans= qu->answer;
+ assert(!ans->owner);
+
+ ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0;
+
+ memcpy(ans->owner,owner,ol);
+ ans->owner[ol]= 0;
+ return 1;
+}
+
int adns_submit(adns_state ads,
const char *owner,
adns_rrtype type,
adns_query qu;
const char *p;
+ adns__consistency(ads,0,cc_entex);
+
typei= adns__findtype(type);
- if (!typei) return adns_s_unknownrrtype;
+ if (!typei) return ENOSYS;
r= gettimeofday(&now,0); if (r) goto x_errno;
qu= query_alloc(ads,typei,flags,now); if (!qu) goto x_errno;
if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; }
if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; }
- if (ol>=2 && owner[ol-1]=='.' && owner[ol-2]!='\\') { flags &= ~adns_qf_search; ol--; }
+ if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) {
+ flags &= ~adns_qf_search;
+ qu->flags= flags;
+ ol--;
+ }
if (flags & adns_qf_search) {
r= adns__vbuf_append(&qu->search_vb,owner,ol);
qu->search_origlen= ol;
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; }
+ }
query_simple(ads,qu, owner,ol, typei,flags, now);
}
+ adns__autosys(ads,now);
+ adns__consistency(ads,qu,cc_entex);
return 0;
x_adnsfail:
adns__query_fail(qu,stat);
+ adns__consistency(ads,qu,cc_entex);
return 0;
x_errno:
r= errno;
assert(r);
+ adns__consistency(ads,0,cc_entex);
return r;
}
+int adns_submit_reverse_any(adns_state ads,
+ const struct sockaddr *addr,
+ const char *zone,
+ adns_rrtype type,
+ adns_queryflags flags,
+ void *context,
+ adns_query *query_r) {
+ const unsigned char *iaddr;
+ char *buf, *buf_free;
+ char shortbuf[100];
+ int r, lreq;
+
+ flags &= ~adns_qf_search;
+
+ if (addr->sa_family != AF_INET) return ENOSYS;
+ iaddr= (const unsigned char*)
+ &(((const struct sockaddr_in*)addr) -> sin_addr);
+
+ lreq= strlen(zone) + 4*4 + 1;
+ if (lreq > sizeof(shortbuf)) {
+ buf= malloc(strlen(zone) + 4*4 + 1);
+ if (!buf) return errno;
+ buf_free= buf;
+ } else {
+ buf= shortbuf;
+ buf_free= 0;
+ }
+ sprintf(buf, "%d.%d.%d.%d.%s", iaddr[3], iaddr[2], iaddr[1], iaddr[0], zone);
+
+ r= adns_submit(ads,buf,type,flags,context,query_r);
+ free(buf_free);
+ return r;
+}
+
+int adns_submit_reverse(adns_state ads,
+ const struct sockaddr *addr,
+ adns_rrtype type,
+ adns_queryflags flags,
+ void *context,
+ adns_query *query_r) {
+ if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL;
+ return adns_submit_reverse_any(ads,addr,"in-addr.arpa",
+ type,flags,context,query_r);
+}
+
int adns_synchronous(adns_state ads,
const char *owner,
adns_rrtype type,
}
void *adns__alloc_interim(adns_query qu, size_t sz) {
+ void *rv;
+
sz= MEM_ROUND(sz);
+ rv= alloc_common(qu,sz);
+ if (!rv) return 0;
qu->interim_allocd += sz;
- return alloc_common(qu,sz);
+ return rv;
+}
+
+void *adns__alloc_preserved(adns_query qu, size_t sz) {
+ void *rv;
+
+ sz= MEM_ROUND(sz);
+ rv= adns__alloc_interim(qu,sz);
+ if (!rv) return 0;
+ qu->preserved_allocd += sz;
+ return rv;
}
void *adns__alloc_mine(adns_query qu, size_t sz) {
return alloc_common(qu,MEM_ROUND(sz));
}
-void adns__transfer_interim(adns_query from, adns_query to, void *block, size_t sz) {
+void adns__transfer_interim(adns_query from, adns_query to,
+ void *block, size_t sz) {
allocnode *an;
if (!block) return;
LIST_UNLINK(from->allocations,an);
LIST_LINK_TAIL(to->allocations,an);
+ sz= MEM_ROUND(sz);
from->interim_allocd -= sz;
to->interim_allocd += sz;
ncqu= cqu->siblings.next;
adns_cancel(cqu);
}
- LIST_INIT(qu->children);
}
-void adns__reset_cnameonly(adns_query qu) {
+void adns__reset_preserved(adns_query qu) {
assert(!qu->final_allocspace);
cancel_children(qu);
qu->answer->nrrs= 0;
- qu->answer->rrs= 0;
- qu->interim_allocd= qu->answer->cname ? MEM_ROUND(strlen(qu->answer->cname)+1) : 0;
+ qu->answer->rrs.untyped= 0;
+ qu->interim_allocd= qu->preserved_allocd;
}
static void free_query_allocs(adns_query qu) {
cancel_children(qu);
for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); }
+ LIST_INIT(qu->allocations);
adns__vbuf_free(&qu->vb);
+ adns__vbuf_free(&qu->search_vb);
+ free(qu->query_dgram);
+ qu->query_dgram= 0;
}
void adns_cancel(adns_query qu) {
+ adns_state ads;
+
+ ads= qu->ads;
+ adns__consistency(ads,qu,cc_entex);
+ if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.);
switch (qu->state) {
- case query_udp: case query_tcpwait: case query_tcpsent:
- LIST_UNLINK(qu->ads->timew,qu);
+ case query_tosend:
+ LIST_UNLINK(ads->udpw,qu);
+ break;
+ case query_tcpw:
+ LIST_UNLINK(ads->tcpw,qu);
break;
- case query_child:
- LIST_UNLINK(qu->ads->childw,qu);
+ case query_childw:
+ LIST_UNLINK(ads->childw,qu);
break;
case query_done:
- LIST_UNLINK(qu->ads->output,qu);
+ LIST_UNLINK(ads->output,qu);
break;
default:
abort();
free_query_allocs(qu);
free(qu->answer);
free(qu);
+ adns__consistency(ads,0,cc_entex);
}
-void adns__update_expires(adns_query qu, unsigned long ttl, struct timeval now) {
+void adns__update_expires(adns_query qu, unsigned long ttl,
+ struct timeval now) {
time_t max;
assert(ttl <= MAXTTLBELIEVE);
ans= qu->answer;
if (qu->interim_allocd) {
- ans= realloc(qu->answer, MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd));
+ ans= realloc(qu->answer,
+ MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd));
if (!ans) goto x_nomem;
qu->answer= ans;
}
qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans));
adns__makefinal_str(qu,&ans->cname);
+ adns__makefinal_str(qu,&ans->owner);
if (ans->nrrs) {
adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz);
return;
x_nomem:
- qu->answer->status= adns_s_nomemory;
+ qu->preserved_allocd= 0;
qu->answer->cname= 0;
- adns__reset_cnameonly(qu);
+ qu->answer->owner= 0;
+ adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */
+
+ qu->answer->status= adns_s_nomemory;
free_query_allocs(qu);
}
adns_answer *ans;
adns_query parent;
+ cancel_children(qu);
+
qu->id= -1;
ans= qu->answer;
+ if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) {
+ if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) {
+ adns__query_fail(qu,adns_s_nomemory);
+ return;
+ }
+ }
+
if (ans->nrrs && qu->typei->diff_needswap) {
if (!adns__vbuf_ensure(&qu->vb,qu->typei->rrsz)) {
adns__query_fail(qu,adns_s_nomemory);
}
adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz,
qu->vb.buf,
- (int(*)(void*, const void*, const void*))qu->typei->diff_needswap,
+ (int(*)(void*, const void*, const void*))
+ qu->typei->diff_needswap,
qu->ads);
}
+ if (ans->nrrs && qu->typei->postsort) {
+ qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei);
+ }
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);
} 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) {
- adns__reset_cnameonly(qu);
+ adns__reset_preserved(qu);
qu->answer->status= stat;
adns__query_done(qu);
}
~ianmdlvl / adns.git / blobdiff