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;
}
void adns__querysend_tcp(adns_query qu, struct timeval now) {
byte length[2];
#if 0
struct iovec iov[2];
#endif
int wr, wr2 = 0, 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 {
#if 0
iov[0].iov_base= (char *)length;
iov[0].iov_len= 2;
iov[1].iov_base= (char *)qu->query_dgram;
iov[1].iov_len= qu->query_dglen;
wr= writev(qu->ads->tcpsocket,iov,2);
#endif
wr = write(qu->ads->tcpsocket, (char *)length, 2);
if (wr > 0)
wr2 = write(qu->ads->tcpsocket, (char *)qu->query_dgram, qu->query_dglen);
if (wr < 0 || wr2 < 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);
}
}
void adns__querysend_tcp(adns_query qu, struct timeval now)
{
byte length[2];
#ifndef WIN32
struct iovec iov[2];
#endif
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 {
#ifdef WIN32
char *buf = NULL;
buf = (char *)ns_malloc((2 + qu->query_dglen));
os_memcpy(buf, length, 2);
os_memcpy((buf + 2), qu->query_dgram, qu->query_dglen);
wr = os_sock_write(qu->ads->tcpsocket, buf, (2 + qu->query_dglen));
errno = os_sock_errno;
ns_free(buf);
#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);
#endif
adns__sigpipe_unprotect(qu->ads);
if (wr < 0) {
if (!
(errno == EAGAIN || errno == OS_SOCK_EINTR
|| errno == ENOSPC || errno == OS_SOCK_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 );
}
}