+ } while (ads->tcpstate == server_ok);
+ r= 0; goto xit;
+ default:
+ abort();
+ }
+ for (i=0; i<ads->nudpsockets; i++) {
+ udp= &ads->udpsockets[i];
+ if (fd == udp->fd) {
+ for (;;) {
+ udpaddrlen= sizeof(udpaddr);
+ r= recvfrom(fd,udpbuf,sizeof(udpbuf),0, &udpaddr.sa,&udpaddrlen);
+ if (r<0) {
+ if (errno == EAGAIN || errno == EWOULDBLOCK) { r= 0; goto xit; }
+ if (errno == EINTR) continue;
+ if (errno_resources(errno)) { r= errno; goto xit; }
+ adns__warn(ads,-1,0,"datagram receive error: %s",strerror(errno));
+ r= 0; goto xit;
+ }
+ for (serv= 0;
+ serv < ads->nservers &&
+ !adns__sockaddrs_equal(&udpaddr.sa,
+ &ads->servers[serv].addr.sa);
+ serv++);
+ if (serv >= ads->nservers) {
+ adns__warn(ads,-1,0,"datagram received from unknown nameserver %s",
+ adns__sockaddr_ntoa(&udpaddr.sa, addrbuf));
+ continue;
+ }
+ adns__procdgram(ads,udpbuf,r,serv,0,*now);
+ }
+ break;
+ }
+ }
+ r= 0;
+xit:
+ adns__returning(ads,0);
+ return r;
+}
+
+int adns_processwriteable(adns_state ads, int fd, const struct timeval *now) {
+ int r;
+
+ adns__consistency(ads,0,cc_entex);
+
+ switch (ads->tcpstate) {
+ case server_disconnected:
+ case server_broken:
+ break;
+ case server_connecting:
+ if (fd != ads->tcpsocket) break;
+ assert(ads->tcprecv.used==0);
+ assert(ads->tcprecv_skip==0);
+ for (;;) {
+ if (!adns__vbuf_ensure(&ads->tcprecv,1)) { r= ENOMEM; goto xit; }
+ r= read(ads->tcpsocket,&ads->tcprecv.buf,1);
+ if (r==0 || (r<0 && (errno==EAGAIN || errno==EWOULDBLOCK))) {
+ tcp_connected(ads,*now);
+ r= 0; goto xit;
+ }
+ if (r>0) {
+ adns__tcp_broken(ads,"connect/read","sent data before first request");
+ r= 0; goto xit;
+ }
+ if (errno==EINTR) continue;
+ if (errno_resources(errno)) { r= errno; goto xit; }
+ adns__tcp_broken(ads,"connect/read",strerror(errno));
+ r= 0; goto xit;
+ } /* not reached */
+ case server_ok:
+ if (fd != ads->tcpsocket) break;
+ while (ads->tcpsend.used) {