[ViewVC] Diff of: cvs/gvpe/src/connection.C

Comparing gvpe/src/connection.C (file contents):
Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC vs.
Revision 1.108 by root, Fri Oct 11 04:07:24 2013 UTC

   si = rsi;
   protocol = rsi.prot;
   slog (L_INFO, _("%s(%s): connection established (%s), protocol version %d.%d."),
         conf->nodename, (const char *)rsi,
-        is_direct ? "direct" : "forwarded",
+        vpn->can_direct (THISNODE, conf) ? "direct" : "forwarded",
         PROTOCOL_MAJOR, prot_minor);
   if (::conf.script_node_up)
     {
       run_script_cb *cb = new run_script_cb;
   // make sure rekeying timeouts are slightly asymmetric
   ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0);
   rekey.start (rekey_interval, rekey_interval);
+  hmac_error = 0.;
   keepalive.start (::conf.keepalive);
   // send queued packets
-  if (ictx && octx)
-    {
-      while (tap_packet *p = (tap_packet *)data_queue.get ())
+  while (tap_packet *p = (tap_packet *)data_queue.get ())
-        {
+    {
-          if (p->len) send_data_packet (p);
+      if (p->len) send_data_packet (p);
-          delete p;
+      delete p;
-        }
+    }
-      while (vpn_packet *p = (vpn_packet *)vpn_queue.get ())
+  while (vpn_packet *p = (vpn_packet *)vpn_queue.get ())
-        {
+    {
-          if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
+      if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY);
-          delete p;
+      delete p;
-        }
     }
   vpn->connection_established (this);
 }
       slog (L_TRACE, _("%s: direct connection denied by config."), conf->nodename);
       protocol = 0;
     }
   si.set (conf, protocol);
-  is_direct = si.valid ();
 }
 // ensure sockinfo is valid, forward if necessary
 const sockinfo &
 connection::forward_si (const sockinfo &si) const
 void
 connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
 {
   if (!vpn->send_vpn_packet (pkt, si, tos))
-    reset_connection ();
+    reset_connection ("packet send error");
 }
 void
 connection::send_ping (const sockinfo &si, u8 pong)
 {
     {
       // a bit hacky, if ondemand, and packets are no longer queued, then reset the connection
       // and stop trying. should probably be handled by a per-connection expire handler.
       if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ())
         {
-          reset_connection ();
+          reset_connection ("no demand");
           return;
         }
       last_establish_attempt = ev_now ();
       w.start (retry_int);
     }
 }
 void
-connection::reset_connection ()
+connection::reset_connection (const char *reason)
 {
   if (ictx && octx)
     {
-      slog (L_INFO, _("%s(%s): connection lost"),
+      slog (L_INFO, _("%s(%s): connection lost (%s)"),
-            conf->nodename, (const char *)si);
+            conf->nodename, (const char *)si, reason);
       if (::conf.script_node_down)
         {
           run_script_cb *cb = new run_script_cb;
           cb->set<connection, &connection::script_node_down> (this);
 connection::shutdown ()
 {
   if (ictx && octx)
     send_reset (si);
-  reset_connection ();
+  reset_connection ("shutdown");
 }
 // poor-man's rekeying
 inline void
 connection::rekey_cb (ev::timer &w, int revents)
 {
-  reset_connection ();
+  reset_connection ("rekeying");
   establish_connection ();
 }
 void
 connection::send_data_packet (tap_packet *pkt)
         // about our desire for communication.
         establish_connection ();
         break;
       case vpn_packet::PT_RESET:
+          slog (L_TRACE, "%s >> PT_RESET", conf->nodename);
+        if (ictx && octx)
-        {
+          {
-          reset_connection ();
+            reset_connection ("remote reset");
-          config_packet *p = (config_packet *) pkt;
+            config_packet *p = (config_packet *) pkt;
-          if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
+            if (p->chk_config (conf, rsi) && connectmode == conf_node::C_ALWAYS)
-            establish_connection ();
+              establish_connection ();
-        }
+          }
         break;
       case vpn_packet::PT_AUTH_REQ:
         if (auth_rate_limiter.can (rsi))
           {
                   slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."),
                         conf->nodename, (const char *)rsi,
                         PROTOCOL_MINOR, conf->nodename, p->prot_minor);
                 if (p->initiate)
+                  {
-                  send_auth_request (rsi, false);
+                    send_auth_request (rsi, false);
+                    if (ictx && octx)
+                      reset_connection ("reconnect");
+                  }
                 auth_data auth;
                 if (!auth_decrypt (::conf.rsa_key, p->encr, auth))
                   {
         if (ictx && octx)
           {
             vpndata_packet *p = (vpndata_packet *)pkt;
             if (!p->hmac_chk (ictx))
+              {
+                // rekeying often creates temporary hmac auth floods
+                // we assume they don't take longer than a few seconds normally,
+                // and suppress messages and resets during that time.
+                //TODO: should be done per source address
+                if (!hmac_error)
+                  {
+                    hmac_error = ev_now () + 3;
+                    break;
+                  }
+                else if (hmac_error >= ev_now ())
+                  break; // silently suppress
+                else
+                  {
-              slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
+                    slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n"
-                             "could be an attack, or just corruption or a synchronization error."),
+                                   "could be an attack, or just corruption or a synchronization error."),
-                    conf->nodename, (const char *)rsi);
+                          conf->nodename, (const char *)rsi);
+                    // reset
+                  }
+              }
             else
               {
                 u32 seqno;
                 tap_packet *d = p->unpack (this, seqno);
                 int seqclass = iseqno.seqno_classify (seqno);
+                hmac_error = 0;
                 if (seqclass == 0) // ok
                   {
                     vpn->tap->send (d);
   if (when >= 0)
     w.start (when);
   else if (when < -15)
     {
-      reset_connection ();
+      reset_connection ("keepalive overdue");
       establish_connection ();
     }
   else if (conf->connectmode != conf_node::C_ONDEMAND
            || THISNODE->connectmode != conf_node::C_ONDEMAND)
     {
   else if (when >= -10)
     // hold ondemand connections implicitly a few seconds longer
     // should delete octx, though, or something like that ;)
     w.start (when + 10);
   else
-    reset_connection ();
+    reset_connection ("keepalive timeout");
 }
 void
 connection::send_connect_request (int id)
 {
   // queue a dummy packet to force an initial connection attempt
   if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED)
     vpn_queue.put (new net_packet);
-  reset_connection ();
+  reset_connection ("startup");
 }
 connection::~connection ()
 {
   shutdown ();

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Comparing gvpe/src/connection.C (file contents): Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC vs. Revision 1.108 by root, Fri Oct 11 04:07:24 2013 UTC

Diff Legend

Comparing gvpe/src/connection.C (file contents):
Revision 1.107 by root, Fri Sep 20 11:57:03 2013 UTC vs.
Revision 1.108 by root, Fri Oct 11 04:07:24 2013 UTC