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-rw-r--r--adns-0.6/src/transmit.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/adns-0.6/src/transmit.c b/adns-0.6/src/transmit.c
deleted file mode 100644
index c669af6..0000000
--- a/adns-0.6/src/transmit.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- * transmit.c
- * - construct queries
- * - send queries
- */
-/*
- * 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 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)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * 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.
- */
-
-#include <errno.h>
-
-#include <sys/types.h>
-#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) {
- int id;
- byte *rqp;
-
- if (!adns__vbuf_ensure(vb,DNS_HDRSIZE+qdlen+4)) return adns_s_nomemory;
-
- vb->used= 0;
- MKQUERY_START(vb);
-
- *id_r= id= (ads->nextid++) & 0x0ffff;
- MKQUERY_ADDW(id);
- MKQUERY_ADDB(0x01); /* QR=Q(0), OPCODE=QUERY(0000), !AA, !TC, RD */
- MKQUERY_ADDB(0x00); /* !RA, Z=000, RCODE=NOERROR(0000) */
- MKQUERY_ADDW(1); /* QDCOUNT=1 */
- MKQUERY_ADDW(0); /* ANCOUNT=0 */
- MKQUERY_ADDW(0); /* NSCOUNT=0 */
- MKQUERY_ADDW(0); /* ARCOUNT=0 */
-
- MKQUERY_STOP(vb);
-
- return adns_s_ok;
-}
-
-static adns_status mkquery_footer(vbuf *vb, adns_rrtype type) {
- byte *rqp;
-
- MKQUERY_START(vb);
- 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;
-}
-
-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 char *p, *pe;
- adns_status st;
-
- st= mkquery_header(ads,vb,id_r,ol+2); if (st) return st;
-
- MKQUERY_START(vb);
-
- p= owner; pe= owner+ol;
- nlabs= 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;
- }
- if (!ll) return adns_s_querydomaininvalid;
- if (nlabs++ > 63) return adns_s_querydomaintoolong;
- MKQUERY_ADDB(ll);
- memcpy(rqp,label,ll); rqp+= ll;
- }
- MKQUERY_ADDB(0);
-
- MKQUERY_STOP(vb);
-
- st= mkquery_footer(vb,typei->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,
- adns_rrtype type, adns_queryflags flags) {
- byte *rqp;
- findlabel_state fls;
- int lablen, labstart;
- adns_status st;
-
- st= mkquery_header(ads,vb,id_r,qd_dglen); if (st) return st;
-
- MKQUERY_START(vb);
-
- adns__findlabel_start(&fls,ads,-1,0,qd_dgram,qd_dglen,qd_dglen,qd_begin,0);
- for (;;) {
- st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
- if (!lablen) break;
- assert(lablen<255);
- MKQUERY_ADDB(lablen);
- memcpy(rqp,qd_dgram+labstart,lablen);
- rqp+= lablen;
- }
- MKQUERY_ADDB(0);
-
- MKQUERY_STOP(vb);
-
- st= mkquery_footer(vb,type);
-
- return adns_s_ok;
-}
-
-void adns__querysend_tcp(adns_query qu, struct timeval now) {
- byte length[2];
- struct iovec iov[2];
- int wr, r;
- adns_state ads;
-
- 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;
-
- qu->retries++;
-
- /* Reset idle timeout. */
- ads->tcptimeout.tv_sec= ads->tcptimeout.tv_usec= 0;
-
- if (ads->tcpsend.used) {
- wr= 0;
- } else {
- iov[0].iov_base= length;
- iov[0].iov_len= 2;
- iov[1].iov_base= qu->query_dgram;
- iov[1].iov_len= qu->query_dglen;
- adns__sigpipe_protect(qu->ads);
- wr= writev(qu->ads->tcpsocket,iov,2);
- adns__sigpipe_unprotect(qu->ads);
- if (wr < 0) {
- if (!(errno == EAGAIN || errno == EINTR || errno == ENOSPC ||
- errno == ENOBUFS || errno == ENOMEM)) {
- adns__tcp_broken(ads,"write",strerror(errno));
- return;
- }
- wr= 0;
- }
- }
-
- if (wr<2) {
- r= adns__vbuf_append(&ads->tcpsend,length,2-wr); assert(r);
- wr= 0;
- } else {
- wr-= 2;
- }
- if (wr<qu->query_dglen) {
- 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) {
- qu->state= query_tcpw;
- qu->timeout= 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;
-
- assert(qu->state == query_tosend);
- if ((qu->flags & adns_qf_usevc) || (qu->query_dglen > DNS_MAXUDP)) {
- query_usetcp(qu,now);
- return;
- }
-
- 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);
-
- r= sendto(ads->udpsocket,qu->query_dgram,qu->query_dglen,0,
- (const struct sockaddr*)&servaddr,sizeof(servaddr));
- if (r<0 && errno == EMSGSIZE) { qu->retries= 0; query_usetcp(qu,now); return; }
- if (r<0) adns__warn(ads,serv,0,"sendto failed: %s",strerror(errno));
-
- qu->timeout= now;
- timevaladd(&qu->timeout,UDPRETRYMS);
- qu->udpsent |= (1<<serv);
- qu->udpnextserver= (serv+1)%ads->nservers;
- qu->retries++;
- LIST_LINK_TAIL(ads->udpw,qu);
-}
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