X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=dce4ae4fcf27038fbf4bd8af3228faec87d03f08;hp=af9077c839caab070f53eeca6687ea3fa3847b41;hb=42455e97a057fb4386f9d8fb2f8963b2ec6ddf24;hpb=e8e7379311ca3bf6e1fdd7d0f477a43e510e2317

diff --git a/src/net.c b/src/net.c
index af9077c8..dce4ae4f 100644
--- a/src/net.c
+++ b/src/net.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net.c,v 1.35.4.13 2000/06/29 13:04:14 guus Exp $
+    $Id: net.c,v 1.35.4.20 2000/07/02 13:40:57 guus Exp $
 */
 
 #include "config.h"
@@ -508,7 +508,8 @@ cp
   cl->meta_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
   if(cl->meta_socket == -1)
     {
-      syslog(LOG_ERR, _("Creating socket failed: %m"));
+      syslog(LOG_ERR, _("Creating socket for %s port %d failed: %m"),
+             cl->real_hostname, cl->port);
       return -1;
     }
 
@@ -525,11 +526,13 @@ cp
   flags = fcntl(cl->meta_socket, F_GETFL);
   if(fcntl(cl->meta_socket, F_SETFL, flags | O_NONBLOCK) < 0)
     {
-      syslog(LOG_ERR, _("fcntl: %m"));
+      syslog(LOG_ERR, _("fcntl for %s port %d: %m"),
+             cl->real_hostname, cl->port);
       return -1;
     }
 
-  syslog(LOG_INFO, _("Connected to %s port %hd"),
+  if(debug_lvl > 0)
+    syslog(LOG_INFO, _("Connected to %s port %hd"),
          cl->real_hostname, cl->port);
 cp
   return 0;
@@ -542,13 +545,20 @@ cp
   an authentication sequence during which
   we will do just that.
 */
-int setup_outgoing_connection(ip_t ip)
+int setup_outgoing_connection(char *hostname)
 {
   conn_list_t *ncn;
+  struct hostent *h;
 cp
+  if(!(h = gethostbyname(hostname)))
+    {
+      syslog(LOG_ERR, _("Error looking up `%s': %m"), hostname);
+      return -1;
+    }
+
   ncn = new_conn_list();
-  ncn->real_ip = ip;
-  ncn->real_hostname = hostlookup(htonl(ip));
+  ncn->real_ip = ntohl(*((ip_t*)(h->h_addr_list[0])));
+  ncn->real_hostname = hostlookup(htonl(ncn->real_ip));
   
   if(setup_outgoing_meta_socket(ncn) < 0)
     {
@@ -625,7 +635,7 @@ cp
 
   while(cfg)
     {
-      if(!setup_outgoing_connection(cfg->data.ip->ip))   /* function returns 0 when there are no problems */
+      if(!setup_outgoing_connection(cfg->data.ptr))   /* function returns 0 when there are no problems */
         {
           signal(SIGALRM, SIG_IGN);
           return;
@@ -636,11 +646,11 @@ cp
   signal(SIGALRM, sigalrm_handler);
   upstreamindex = 0;
   seconds_till_retry += 5;
-  if(seconds_till_retry>300)    /* Don't wait more than 5 minutes. */
-    seconds_till_retry = 300;
-  alarm(seconds_till_retry);
+  if(seconds_till_retry > MAXTIMEOUT)    /* Don't wait more than MAXTIMEOUT seconds. */
+    seconds_till_retry = MAXTIMEOUT;
   syslog(LOG_ERR, _("Still failed to connect to other, will retry in %d seconds"),
 	 seconds_till_retry);
+  alarm(seconds_till_retry);
 cp
 }
 
@@ -668,16 +678,16 @@ cp
 
   while(cfg)
     {
-      if(!setup_outgoing_connection(cfg->data.ip->ip))   /* function returns 0 when there are no problems */
+      if(!setup_outgoing_connection(cfg->data.ptr))   /* function returns 0 when there are no problems */
         return 0;
       cfg = get_next_config_val(upstreamip, upstreamindex++); /* Or else we try the next ConnectTo line */
     }
     
   signal(SIGALRM, sigalrm_handler);
   upstreamindex = 0;
-  seconds_till_retry = 300;
+  seconds_till_retry = MAXTIMEOUT;
+  syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry);
   alarm(seconds_till_retry);
-  syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 minutes"));
 cp
   return 0;
 }
@@ -751,7 +761,8 @@ cp
   flags = fcntl(nfd, F_GETFL);
   if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
     {
-      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, nfd);
+      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, nfd,
+             cl->vpn_hostname, cl->real_hostname);
       return -1;
     }
 
@@ -779,7 +790,6 @@ cp
       return NULL;
     }
 
-  p->vpn_hostname = _("unknown");
   p->real_ip = ntohl(ci.sin_addr.s_addr);
   p->real_hostname = hostlookup(ci.sin_addr.s_addr);
   p->meta_socket = sfd;
@@ -794,7 +804,7 @@ cp
 
   if(send_basic_info(p) < 0)
     {
-      free(p);
+      free_conn_element(p);
       return NULL;
     }
 cp
@@ -838,12 +848,14 @@ int handle_incoming_vpn_data(conn_list_t *cl)
 cp
   if(getsockopt(cl->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
     {
-      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, cl->socket);
+      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, cl->socket,
+             cl->vpn_hostname, cl->real_hostname);
       return -1;
     }
   if(x)
     {
-      syslog(LOG_ERR, _("Incoming data socket error: %s"), sys_errlist[x]);
+      syslog(LOG_ERR, _("Incoming data socket error for %s (%s): %s"),
+             cl->vpn_hostname, cl->real_hostname, sys_errlist[x]);
       return -1;
     }
 
@@ -851,7 +863,7 @@ cp
   lenin = recvfrom(cl->socket, &rp, MTU, 0, NULL, NULL);
   if(lenin <= 0)
     {
-      syslog(LOG_ERR, _("Receiving packet from %s failed: %m"), cl->real_hostname);
+      syslog(LOG_ERR, _("Receiving packet from %s (%s) failed: %m"), cl->vpn_hostname, cl->real_hostname);
       return -1;
     }
   total_socket_in += lenin;
@@ -904,49 +916,47 @@ cp
 
   if(cl->status.timeout)
     send_timeout(cl);
-  else if(!cl->status.termreq)
+/*  else if(!cl->status.termreq)
     send_termreq(cl);
-
-  close(cl->socket);
+ */
+ 
+  if(cl->socket)
+    close(cl->socket);
   if(cl->status.meta)
     close(cl->meta_socket);
 
-  if(cl->status.outgoing)
-    {
-      signal(SIGALRM, sigalrm_handler);
-      seconds_till_retry = 5;
-      alarm(seconds_till_retry);
-      syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds"));
-    }
-  
   cl->status.remove = 1;
 
-  /* If this cl isn't active, don't send any DEL_HOSTs and don't bother
-     checking for other lost connections. */
-  if(!cl->status.active)
-    return;
+  /* If this cl isn't active, don't send any DEL_HOSTs. */
+  if(cl->status.active)
+    notify_others(cl,NULL,send_del_host);
     
-  cl->status.active = 0;
-
 cp
   /* Find all connections that were lost because they were behind cl
      (the connection that was dropped). */
-  for(p = conn_list; p != NULL; p = p->next)
-    if(p->nexthop == cl)
+  if(cl->status.meta)
+    for(p = conn_list; p != NULL; p = p->next)
       {
-	p->status.active = 0;
-	p->status.remove = 1;
+        if((p->nexthop == cl) && (p != cl))
+          {
+            if(cl->status.active && p->status.active)
+              notify_others(p,cl,send_del_host);
+           if(cl->socket)
+             close(cl->socket);
+	    p->status.active = 0;
+	    p->status.remove = 1;
+          }
       }
-
-cp 
-  /* Then send a notification about all these connections to all hosts
-     that are still connected to us. */
-  for(p = conn_list; p != NULL; p = p->next)
-    if(p->status.active && p->status.meta)
-      for(q = conn_list; q != NULL; q = q->next)
-	if(q->status.remove)
-	  send_del_host(p, q);
-
+    
+  cl->status.active = 0;
+  
+  if(cl->status.outgoing)
+    {
+      signal(SIGALRM, sigalrm_handler);
+      seconds_till_retry = 5;
+      alarm(seconds_till_retry);
+      syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds"));
+    }
 cp
 }
 
@@ -1010,7 +1020,7 @@ cp
       return -1;
     }
 
-  if((ncn = create_new_connection(nfd)) == NULL)
+  if(!(ncn = create_new_connection(nfd)))
     {
       shutdown(nfd, 2);
       close(nfd);
@@ -1036,12 +1046,14 @@ int handle_incoming_meta_data(conn_list_t *cl)
 cp
   if(getsockopt(cl->meta_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
     {
-      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, cl->meta_socket);
+      syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, cl->meta_socket,
+             cl->vpn_hostname, cl->real_hostname);
       return -1;
     }
   if(x)
     {
-      syslog(LOG_ERR, _("Metadata socket error: %s"), sys_errlist[x]);
+      syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
+             cl->vpn_hostname, cl->real_hostname, sys_errlist[x]);
       return -1;
     }
 
@@ -1057,7 +1069,13 @@ cp
     {
       if(errno==EINTR)
         return 0;      
-      syslog(LOG_ERR, _("Metadata socket read error: %m"));
+      if(errno==0)
+        if(debug_lvl>0)
+          syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
+                 cl->vpn_hostname, cl->real_hostname);
+      else
+        syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %m"),
+               cl->vpn_hostname, cl->real_hostname);
       return -1;
     }
 
@@ -1146,7 +1164,8 @@ cp
 	      I've once got here when it said `No route to host'.
 	    */
 	    getsockopt(p->socket, SOL_SOCKET, SO_ERROR, &x, &l);
-	    syslog(LOG_ERR, _("Outgoing data socket error: %s"), sys_errlist[x]);
+	    syslog(LOG_ERR, _("Outgoing data socket error for %s (%s): %s"),
+                   p->vpn_hostname, p->real_hostname, sys_errlist[x]);
 	    terminate_connection(p);
 	    return;
 	  }  
@@ -1236,10 +1255,26 @@ cp
 
       if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0)
         {
-	  if(errno == EINTR) /* because of alarm */
-	    continue;
-          syslog(LOG_ERR, _("Error while waiting for input: %m"));
-          return;
+	  if(errno != EINTR) /* because of alarm */
+            {
+              syslog(LOG_ERR, _("Error while waiting for input: %m"));
+              return;
+            }
+        }
+
+      if(sighup)
+        {
+          sighup = 0;
+          close_network_connections();
+          clear_config();
+          if(read_config_file(configfilename))
+            {
+              syslog(LOG_ERR, _("Unable to reread configuration file, exiting"));
+              exit(0);
+            }
+          sleep(5);
+          setup_network_connections();
+          continue;
         }
 
       if(last_ping_check + timeout < time(NULL))
@@ -1247,14 +1282,16 @@ cp
 	{
 	  check_dead_connections();
           last_ping_check = time(NULL);
-	  continue;
 	}
 
-      check_network_activity(&fset);
+      if(r > 0)
+        {
+          check_network_activity(&fset);
 
-      /* local tap data */
-      if(FD_ISSET(tap_fd, &fset))
-	handle_tap_input();
+          /* local tap data */
+          if(FD_ISSET(tap_fd, &fset))
+	    handle_tap_input();
+        }
     }
 cp
 }