* - send queries
*/
/*
- * This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
+ * 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 <sys/uio.h>
#include "internal.h"
+#include "tvarith.h"
#define MKQUERY_START(vb) (rqp= (vb)->buf+(vb)->used)
#define MKQUERY_ADDB(b) *rqp++= (b)
#define MKQUERY_ADDW(w) (MKQUERY_ADDB(((w)>>8)&0x0ff), MKQUERY_ADDB((w)&0x0ff))
#define MKQUERY_STOP(vb) ((vb)->used= rqp-(vb)->buf)
-static adns_status mkquery_header(adns_state ads, vbuf *vb, int *id_r, int qdlen) {
+static adns_status mkquery_header(adns_state ads, vbuf *vb,
+ int *id_r, int qdlen) {
int id;
byte *rqp;
byte *rqp;
MKQUERY_START(vb);
- MKQUERY_ADDW(type & adns__rrt_typemask); /* QTYPE */
+ MKQUERY_ADDW(type & adns_rrt_typemask); /* QTYPE */
MKQUERY_ADDW(DNS_CLASS_IN); /* QCLASS=IN */
MKQUERY_STOP(vb);
assert(vb->used <= vb->avail);
return adns_s_ok;
}
+static adns_status qdparselabel(adns_state ads,
+ const char **p_io, const char *pe,
+ char label_r[], int *ll_io,
+ adns_queryflags flags) {
+ int ll, c;
+ const char *p;
+
+ ll= 0;
+ p= *p_io;
+
+ while (p!=pe && (c= *p++)!='.') {
+ if (c=='\\') {
+ if (!(flags & adns_qf_quoteok_query)) return adns_s_querydomaininvalid;
+ if (ctype_digit(p[0])) {
+ if (p+1==pe || p+2==pe) return adns_s_querydomaininvalid;
+ if (ctype_digit(p[1]) && ctype_digit(p[2])) {
+ c= (*p++ - '0')*100;
+ c += (*p++ - '0')*10;
+ c += (*p++ - '0');
+ if (c >= 256) return adns_s_querydomaininvalid;
+ } else {
+ return adns_s_querydomaininvalid;
+ }
+ } else if (!(c= *p++)) {
+ return adns_s_querydomaininvalid;
+ }
+ }
+ if (ll == *ll_io) return adns_s_querydomaininvalid;
+ label_r[ll++]= c;
+ }
+
+ *p_io= p;
+ *ll_io= ll;
+ return adns_s_ok;
+}
+
adns_status adns__mkquery(adns_state ads, vbuf *vb, int *id_r,
const char *owner, int ol,
- const typeinfo *typei, adns_queryflags flags) {
- int ll, c, nlabs;
- byte label[255], *rqp;
+ const typeinfo *typei, adns_rrtype type,
+ adns_queryflags flags) {
+ int ll, nbytes;
+ byte label[255];
+ byte *rqp;
const char *p, *pe;
adns_status st;
- st= mkquery_header(ads,vb,id_r,strlen(owner)+2); if (st) return st;
+ if (!((type^adns_r_addr) & adns_rrt_reprmask)) ads->nextid++;
+ st= mkquery_header(ads,vb,id_r,ol+2); if (st) return st;
MKQUERY_START(vb);
p= owner; pe= owner+ol;
- nlabs= 0;
+ nbytes= 0;
while (p!=pe) {
- ll= 0;
- while (p!=pe && (c= *p++)!='.') {
- if (c=='\\') {
- if (!(flags & adns_qf_quoteok_query)) return adns_s_querydomaininvalid;
- if (ctype_digit(p[0])) {
- if (ctype_digit(p[1]) && ctype_digit(p[2])) {
- c= (*p++ - '0')*100 + (*p++ - '0')*10 + (*p++ - '0');
- if (c >= 256) return adns_s_querydomaininvalid;
- } else {
- return adns_s_querydomaininvalid;
- }
- } else if (!(c= *p++)) {
- return adns_s_querydomaininvalid;
- }
- }
- if (!(flags & adns_qf_quoteok_query)) {
- if (c == '-') {
- if (!ll) return adns_s_querydomaininvalid;
- } else if (!ctype_alpha(c) && !ctype_digit(c)) {
- return adns_s_querydomaininvalid;
- }
- }
- if (ll == sizeof(label)) return adns_s_querydomaininvalid;
- label[ll++]= c;
- }
+ ll= sizeof(label);
+ st= qdparselabel(ads, &p,pe, label, &ll, flags);
+ if (st) return st;
if (!ll) return adns_s_querydomaininvalid;
- if (nlabs++ > 63) return adns_s_querydomaintoolong;
+ if (ll > DNS_MAXLABEL) return adns_s_querydomaintoolong;
+ nbytes+= ll+1;
+ if (nbytes >= DNS_MAXDOMAIN) return adns_s_querydomaintoolong;
MKQUERY_ADDB(ll);
memcpy(rqp,label,ll); rqp+= ll;
}
MKQUERY_STOP(vb);
- st= mkquery_footer(vb,typei->type);
+ st= mkquery_footer(vb,type);
return adns_s_ok;
}
adns_status adns__mkquery_frdgram(adns_state ads, vbuf *vb, int *id_r,
- const byte *qd_dgram, int qd_dglen, int qd_begin,
+ const byte *qd_dgram, int qd_dglen,
+ int qd_begin,
adns_rrtype type, adns_queryflags flags) {
byte *rqp;
findlabel_state fls;
int lablen, labstart;
adns_status st;
+ if (!((type^adns_r_addr) & adns_rrt_reprmask)) ads->nextid++;
st= mkquery_header(ads,vb,id_r,qd_dglen); if (st) return st;
MKQUERY_START(vb);
return adns_s_ok;
}
-void adns__query_tcp(adns_query qu, struct timeval now) {
+void adns__querysend_tcp(adns_query qu, struct timeval now) {
byte length[2];
struct iovec iov[2];
int wr, r;
if (qu->ads->tcpstate != server_ok) return;
+ assert(qu->state == query_tcpw);
+
length[0]= (qu->query_dglen&0x0ff00U) >>8;
length[1]= (qu->query_dglen&0x0ff);
ads= qu->ads;
- if (!adns__vbuf_ensure(&ads->tcpsend,ads->tcpsend.used+qu->query_dglen+2)) return;
+ if (!adns__vbuf_ensure(&ads->tcpsend,ads->tcpsend.used+qu->query_dglen+2))
+ return;
- timevaladd(&now,TCPMS);
- qu->timeout= now;
- qu->state= query_tcpsent;
+ qu->retries++;
+
+ /* Reset idle timeout. */
+ ads->tcptimeout.tv_sec= ads->tcptimeout.tv_usec= 0;
if (ads->tcpsend.used) {
wr= 0;
wr-= 2;
}
if (wr<qu->query_dglen) {
- r= adns__vbuf_append(&ads->tcpsend,qu->query_dgram+wr,qu->query_dglen-wr); assert(r);
+ r= adns__vbuf_append(&ads->tcpsend,qu->query_dgram+wr,qu->query_dglen-wr);
+ assert(r);
}
}
static void query_usetcp(adns_query qu, struct timeval now) {
- timevaladd(&now,TCPMS);
+ qu->state= query_tcpw;
qu->timeout= now;
- qu->state= query_tcpwait;
- LIST_LINK_TAIL(qu->ads->timew,qu);
- adns__query_tcp(qu,now);
+ timevaladd(&qu->timeout,TCPWAITMS);
+ LIST_LINK_TAIL(qu->ads->tcpw,qu);
+ adns__querysend_tcp(qu,now);
adns__tcp_tryconnect(qu->ads,now);
}
void adns__query_send(adns_query qu, struct timeval now) {
- struct sockaddr_in servaddr;
int serv, r;
adns_state ads;
+ adns_rr_addr *addr;
assert(qu->state == query_tosend);
if ((qu->flags & adns_qf_usevc) || (qu->query_dglen > DNS_MAXUDP)) {
return;
}
- if (qu->udpretries >= UDPMAXRETRIES) {
+ if (qu->retries >= UDPMAXRETRIES) {
adns__query_fail(qu,adns_s_timeout);
return;
}
- serv= qu->udpnextserver;
- memset(&servaddr,0,sizeof(servaddr));
-
ads= qu->ads;
- servaddr.sin_family= AF_INET;
- servaddr.sin_addr= ads->servers[serv].addr;
- servaddr.sin_port= htons(DNS_PORT);
+ serv= qu->udpnextserver;
+ addr= &ads->servers[serv];
r= sendto(ads->udpsocket,qu->query_dgram,qu->query_dglen,0,
- (const struct sockaddr*)&servaddr,sizeof(servaddr));
- if (r<0 && errno == EMSGSIZE) { query_usetcp(qu,now); return; }
- if (r<0) adns__warn(ads,serv,0,"sendto failed: %s",strerror(errno));
+ &addr->addr.sa,addr->len);
+ if (r<0 && errno == EMSGSIZE) {
+ qu->retries= 0;
+ query_usetcp(qu,now);
+ return;
+ }
+ if (r<0 && errno != EAGAIN)
+ adns__warn(ads,serv,0,"sendto failed: %s",strerror(errno));
- timevaladd(&now,UDPRETRYMS);
qu->timeout= now;
+ timevaladd(&qu->timeout,UDPRETRYMS);
qu->udpsent |= (1<<serv);
qu->udpnextserver= (serv+1)%ads->nservers;
- qu->udpretries++;
- LIST_LINK_TAIL(ads->timew,qu);
+ qu->retries++;
+ LIST_LINK_TAIL(ads->udpw,qu);
}
~mdw / adns / blobdiff