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[adns.git] / src / event.c

diff --git a/src/event.c b/src/event.c
index 778c7768d676a35c811b8fc3e7143091def846e0..db3dad68e776168a2c645aa14e801413cf837dd7 100644 (file)
--- a/src/event.c
+++ b/src/event.c
@@ -5,7 +5,7 @@
  * - user-visible check/wait and event-loop-related functions
  */
 /*
- *  This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
+ *  This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
  *  
  *  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
@@ -76,7 +76,6 @@ void adns__tcp_tryconnect(adns_state ads, struct timeval now) {
   int r, fd, tries;
   struct sockaddr_in addr;
   struct protoent *proto;
-  /* fixme: single TCP timeout, not once per server */
 
   for (tries=0; tries<ads->nservers; tries++) {
     if (ads->tcpstate == server_connecting || ads->tcpstate == server_ok) return;
@@ -201,6 +200,7 @@ void adns_interest(adns_state ads, int *maxfd,
     inter_addfd(maxfd,readfds,ads->tcpsocket);
     inter_addfd(maxfd,exceptfds,ads->tcpsocket);
     if (ads->tcpsend.used) inter_addfd(maxfd,writefds,ads->tcpsocket);
+    break;
   default:
     abort();
   }
@@ -230,7 +230,7 @@ static int internal_callback(adns_state ads, int maxfd,
     if (callb_checkfd(maxfd,writefds,ads->tcpsocket)) {
       count++;
       assert(ads->tcprecv.used==0);
-      adns__vbuf_ensure(&ads->tcprecv,1);
+      if (!adns__vbuf_ensure(&ads->tcprecv,1)) return -1;
       if (ads->tcprecv.buf) {
        r= read(ads->tcpsocket,&ads->tcprecv.buf,1);
        if (r==0 || (r<0 && (errno==EAGAIN || errno==EWOULDBLOCK))) {
@@ -263,8 +263,10 @@ static int internal_callback(adns_state ads, int maxfd,
        }
        ads->tcprecv.used -= skip;
        memmove(ads->tcprecv.buf,ads->tcprecv.buf+skip,ads->tcprecv.used);
-       adns__vbuf_ensure(&ads->tcprecv,want);
-       if (ads->tcprecv.used >= ads->tcprecv.avail) break;
+       skip= 0;
+       if (!adns__vbuf_ensure(&ads->tcprecv,want)) return -1;
+       assert(ads->tcprecv.used <= ads->tcprecv.avail);
+       if (ads->tcprecv.used == ads->tcprecv.avail) continue;
        r= read(ads->tcpsocket,
                ads->tcprecv.buf+ads->tcprecv.used,
                ads->tcprecv.avail-ads->tcprecv.used);
@@ -282,7 +284,9 @@ static int internal_callback(adns_state ads, int maxfd,
     } else if (callb_checkfd(maxfd,exceptfds,ads->tcpsocket)) {
       adns__tcp_broken(ads,"select","exceptional condition detected");
     } else if (ads->tcpsend.used && callb_checkfd(maxfd,writefds,ads->tcpsocket)) {
+      adns__sigpipe_protect(ads);
       r= write(ads->tcpsocket,ads->tcpsend.buf,ads->tcpsend.used);
+      adns__sigpipe_unprotect(ads);
       if (r<0) {
        if (errno!=EAGAIN && errno!=EWOULDBLOCK && errno!=ENOMEM && errno!=EINTR) {
          adns__tcp_broken(ads,"write",strerror(errno));
@@ -292,6 +296,7 @@ static int internal_callback(adns_state ads, int maxfd,
        memmove(ads->tcpsend.buf,ads->tcpsend.buf+r,ads->tcpsend.used);
       }
     }
+    break;
   default:
     abort();
   }
@@ -370,7 +375,7 @@ static int internal_check(adns_state ads,
   }
   LIST_UNLINK(ads->output,qu);
   *answer= qu->answer;
-  if (context_r) *context_r= qu->context.ext;
+  if (context_r) *context_r= qu->ctx.ext;
   free(qu);
   return 0;
 }
@@ -390,7 +395,10 @@ int adns_wait(adns_state ads,
     FD_ZERO(&readfds); FD_ZERO(&writefds); FD_ZERO(&exceptfds);
     adns_interest(ads,&maxfd,&readfds,&writefds,&exceptfds,&tvp,&tvbuf);
     rsel= select(maxfd,&readfds,&writefds,&exceptfds,tvp);
-    if (rsel==-1) return r;
+    if (rsel==-1) {
+      if (errno == EINTR && !(ads->iflags & adns_if_eintr)) continue;
+      return errno;
+    }
     rcb= adns_callback(ads,maxfd,&readfds,&writefds,&exceptfds);
     assert(rcb==rsel);
   }