* - query submission and cancellation (user-visible and internal)
*/
/*
- * This file is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- *
- * It is part of adns, which is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999 Tony Finch <dot@dotat.at>
+ * This file is part of adns, which is
+ * Copyright (C) 1997-2000,2003,2006 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
#include "internal.h"
-static adns_query query_alloc(adns_state ads, const typeinfo *typei,
+static adns_query query_alloc(adns_state ads,
+ const typeinfo *typei, adns_rrtype type,
adns_queryflags flags, struct timeval now) {
/* Allocate a virgin query and return it. */
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_tosend;
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;
qu->answer->status= adns_s_ok;
qu->answer->cname= qu->answer->owner= 0;
- qu->answer->type= typei->type;
+ qu->answer->type= type;
qu->answer->expires= -1;
qu->answer->nrrs= 0;
qu->answer->rrs.untyped= 0;
- qu->answer->rrsz= typei->rrsz;
+ qu->answer->rrsz= typei->getrrsz(typei,type);
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->id= id;
qu->query_dglen= qu->vb.used;
memcpy(qu->query_dgram,qu->vb.buf,qu->vb.used);
-
- adns__query_send(qu,now);
+
+ typei->query_send(qu,now);
+}
+
+adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags,
+ union checklabel_state *cls,
+ qcontext *ctx, int labnum,
+ 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++) {
+ c= label[i];
+ if (c == '-') {
+ if (!i) return adns_s_querydomaininvalid;
+ } else if (!ctype_alpha(c) && !ctype_digit(c)) {
+ return adns_s_querydomaininvalid;
+ }
+ }
+ return adns_s_ok;
+}
+
+static adns_status check_domain_name(adns_state ads, adns_queryflags flags,
+ qcontext *ctx, const typeinfo *typei,
+ const byte *dgram, int dglen)
+{
+ findlabel_state fls;
+ adns_status err;
+ 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;
+ } while (lablen);
+ return adns_s_ok;
}
adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
- const typeinfo *typei, vbuf *qumsg_vb, int id,
+ const typeinfo *typei, adns_rrtype type,
+ vbuf *qumsg_vb, int id,
adns_queryflags flags, struct timeval now,
- const qcontext *ctx) {
+ qcontext *ctx) {
adns_query qu;
+ adns_status err;
- qu= query_alloc(ads,typei,flags,now);
- if (!qu) { adns__vbuf_free(qumsg_vb); return adns_s_nomemory; }
+ err= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used);
+ if (err) goto x_err;
+ qu= query_alloc(ads,typei,type,flags,now);
+ if (!qu) { err = adns_s_nomemory; goto x_err; }
*query_r= qu;
memcpy(&qu->ctx,ctx,sizeof(qu->ctx));
query_submit(ads,qu, typei,qumsg_vb,id,flags,now);
return adns_s_ok;
+
+x_err:
+ adns__vbuf_free(qumsg_vb);
+ return err;
}
static void query_simple(adns_state ads, 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);
+ stat= adns__mkquery(ads,&qu->vb,&id, owner,ol,
+ typei,qu->answer->type, 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;
+ }
+ }
+
+ stat= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used);
if (stat) { 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);
}
/* 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);
int adns_submit(adns_state ads,
const char *owner,
adns_rrtype type,
- int flags,
+ adns_queryflags flags,
void *context,
adns_query *query_r) {
int r, ol, ndots;
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;
+ qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno;
qu->ctx.ext= context;
qu->ctx.callback= 0;
- memset(&qu->ctx.info,0,sizeof(qu->ctx.info));
+ memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo));
+ memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo));
*query_r= qu;
if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) {
flags &= ~adns_qf_search;
+ qu->flags= flags;
ol--;
}
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) {
+ char *buf, *buf_free = 0;
+ char shortbuf[100];
+ int r;
+
+ flags &= ~adns_qf_search;
+
+ buf = shortbuf;
+ r= adns__make_reverse_domain(addr,zone, &buf,sizeof(shortbuf),&buf_free);
+ if (r) return r;
+ 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,
- int flags,
+ adns_queryflags flags,
void *context,
adns_query *query_r) {
- const unsigned char *iaddr;
- char buf[30];
-
- if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL;
- flags &= ~adns_qf_search;
-
- if (addr->sa_family != AF_INET) return ENOSYS;
- iaddr= (const unsigned char*) &(((const struct sockaddr_in*)addr) -> sin_addr);
-
- sprintf(buf, "%d.%d.%d.%d.in-addr.arpa",
- iaddr[3], iaddr[2], iaddr[1], iaddr[0]);
-
- return adns_submit(ads,buf,type,flags,context,query_r);
+ if (((type^adns_r_ptr) & adns_rrt_reprmask) &&
+ ((type^adns_r_ptr_raw) & adns_rrt_reprmask))
+ return EINVAL;
+ return adns_submit_reverse_any(ads,addr,0,type,flags,context,query_r);
}
int adns_synchronous(adns_state ads,
const char *owner,
adns_rrtype type,
- int flags,
+ adns_queryflags flags,
adns_answer **answer_r) {
adns_query qu;
int r;
an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz));
if (!an) return 0;
LIST_LINK_TAIL(qu->allocations,an);
+ an->sz= sz;
return (byte*)an + MEM_ROUND(sizeof(*an));
}
return rv;
}
+static allocnode *alloc_info(adns_query qu, void *p, size_t *sz_r) {
+ allocnode *an;
+
+ if (!p || p == qu) { *sz_r= 0; return 0; }
+ an= (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode)));
+ *sz_r= MEM_ROUND(an->sz);
+ return an;
+}
+
+void adns__free_interim(adns_query qu, void *p) {
+ size_t 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;
+}
+
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) {
- allocnode *an;
+void adns__transfer_interim(adns_query from, adns_query to, void *block) {
+ size_t sz;
+ allocnode *an= alloc_info(from, block, &sz);
- if (!block) return;
- an= (void*)((byte*)block - MEM_ROUND(sizeof(*an)));
+ if (!an) return;
assert(!to->final_allocspace);
assert(!from->final_allocspace);
return rp;
}
-static void cancel_children(adns_query qu) {
+void adns__cancel_children(adns_query qu) {
adns_query cqu, ncqu;
for (cqu= qu->children.head; cqu; cqu= ncqu) {
void adns__reset_preserved(adns_query qu) {
assert(!qu->final_allocspace);
- cancel_children(qu);
+ adns__cancel_children(qu);
qu->answer->nrrs= 0;
qu->answer->rrs.untyped= 0;
qu->interim_allocd= qu->preserved_allocd;
static void free_query_allocs(adns_query qu) {
allocnode *an, *ann;
- cancel_children(qu);
+ adns__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__consistency(ads,qu,cc_entex);
if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.);
switch (qu->state) {
- case query_tosend: case query_tcpwait: case query_tcpsent:
- LIST_UNLINK(ads->timew,qu);
+ case query_tosend:
+ LIST_UNLINK(ads->udpw,qu);
+ break;
+ case query_tcpw:
+ LIST_UNLINK(ads->tcpw,qu);
break;
- case query_child:
+ case query_childw:
LIST_UNLINK(ads->childw,qu);
break;
case query_done:
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;
}
adns_answer *ans;
adns_query parent;
- cancel_children(qu);
+ adns__cancel_children(qu);
qu->id= -1;
ans= qu->answer;
- if (qu->flags & adns_qf_owner && qu->flags & adns_qf_search &&
- ans->status != adns_s_nomemory) {
+ 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)) {
+ if (!adns__vbuf_ensure(&qu->vb,qu->answer->rrsz)) {
adns__query_fail(qu,adns_s_nomemory);
return;
}
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,ans->rrsz, qu->typei);
+ }
ans->expires= qu->expires;
parent= qu->parent;
LIST_UNLINK(qu->ads->childw,parent);
qu->ctx.callback(parent,qu);
free_query_allocs(qu);
+ free(qu->answer);
free(qu);
} else {
makefinal_query(qu);
~ianmdlvl / adns.git / blobdiff