[ViewVC] Diff of: cvs/deliantra/server/socket/loop.C

Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.63 by root, Sat Jul 28 00:15:03 2007 UTC vs.
Revision 1.68 by root, Thu Aug 9 04:11:24 2007 UTC

 #include <loader.h>
 #define BG_SCRUB_RATE 4 // how often to send a face in the background
-#define MAX_QUEUE_DEPTH   500
+#define MAX_QUEUE_DEPTH   50
 #define MAX_QUEUE_BACKLOG 3.
+// disconnect a socket after this many seconds without an ack
+#define SOCKET_TIMEOUT 8.
 void
 client::reset_state ()
 {
   if (!pl)
   else
     return false;
 }
 void
-flush_sockets (void)
-{
-  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
-    (*i)->flush ();
-}
-/**
- * This checks the sockets for input, does the right thing.
- *
- * A bit of this code is grabbed out of socket.c
- * There are 2 lists we need to look through - init_sockets is a list
- *
- */
-void
-doeric_server (void)
-{
-  //TODO: should not be done here, either
-  for (unsigned i = 0; i < clients.size (); ++i)
-    {
-      client *ns = clients [i];
-      ns->tick ();
-      ns->refcnt_chk ();
-    }
-}
-void
 client::tick ()
 {
   if (!pl || destroyed ())
     return;
   draw_client_map (pl);
   if (update_look)
     esrv_draw_look (pl);
+#if HAVE_TCP_INFO
+  // check time of last ack, and, if too old, kill connection
+  socklen_t len = sizeof (tcpi);
+  if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
+    {
+      if (tcpi.tcpi_snd_mss)
+        mss = tcpi.tcpi_snd_mss;
+#if 0
+      fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n",
+               tcpi.tcpi_unacked,
+               tcpi.tcpi_sacked,
+               tcpi.tcpi_lost,
+               tcpi.tcpi_retrans,
+               tcpi.tcpi_fackets,
+               tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss,
+               tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked));
+#endif
+      // fast-time-out a player by checking for missign acks
+      // do this only when player is active
+      if (pl && pl->active
+          && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
+        {
+          send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
+          write_outputbuffer ();
+          LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
+               (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
+          destroy ();
+        }
+    }
+#endif
+  rate_avail = min (max_rate + mss, rate_avail + max_rate);
+  int max_send = rate_avail;
+#if HAVE_TCP_INFO
+  // further restrict the available bandwidth by the excess bandwidth available
+  max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss);
+#endif
+  // if we can split images, round to next-lowest mss
+  if (fxix) max_send -= max_send % mss;
   if (ixface.empty ())
     {
       // regularly send a new face when queue is empty
       if (bg_scrub && !--bg_scrub && enable_bg_scrub)
         while (scrub_idx < faces.size () - 1)
           {
             ++scrub_idx;
             if (!faces_sent [scrub_idx])
+              if (faceinfo *f = face_info (scrub_idx))
+                if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now
-              {
+                  {
-                send_face (scrub_idx, -120);
+                    send_face (scrub_idx, -120);
-                flush_fx ();
+                    flush_fx ();
-                bg_scrub = 1; // send up to one face per tick, unless an image was requested
+                    bg_scrub = 1; // send up to one fx per tick, unless an image was requested
+                    break;
+                  }
+          }
+    }
+  else
+    {
+      bg_scrub = BG_SCRUB_RATE;
+      for (;;)
+        {
+          int avail = max_send - outputbuffer_len ();
+          if (avail <= 0)
+            break;
+          ixsend &ix = ixface.back ();
+          if (facedata *d = face_data (ix.idx, faceset))
+            {
+              if (fxix)
+                {
+                  // estimate the packet header overhead "ix " + idx + (new)ofs
+                  int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs);
+                  int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen;
+                  // only transfer something if the amount of data transferred
+                  // has a healthy relation to the header overhead
+                  if (chunk < 64)
+                    break;
+                  chunk = min (chunk, (int)ix.ofs);
+                  ix.ofs -= chunk;
+                  //fprintf (stderr, "i%dx %6d: %5d+%4d   (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D
+                  packet sl ("ix");
+                  sl << ber32 (ix.idx)
+                     << ber32 (ix.ofs)
+                     << data (d->data.data () + ix.ofs, chunk);
+                  send_packet (sl);
+                }
+              else
+                {
+                  send_image (ix.idx);
+                  ix.ofs = 0;
+                }
+            }
+          else
+            ix.ofs = 0;
+          if (!ix.ofs)
+            {
+              ixface.pop_back ();
+              if (ixface.empty ())
                 break;
-              }
-          }
-      rate_avail = max_rate - outputbuffer_len ();
-    }
-  else
-    {
-      bool overload = false;
-#if HAVE_TCP_INFO
-      // do bandwidth checking
-      if (tcpi.tcpi_unacked + 1 > max (4, tcpi.tcpi_snd_cwnd))
-        {
-          overload = true;
-          if (next_rate_adjust <= NOW)
-            {
-              next_rate_adjust = NOW + 2;
-              max_rate = max (max_rate >> 1, int (5000 * TICK));
-              LOG (llevDebug, "tcp %s overloaded (%d + 1 > 4 | %d), rate now %d\n",
-                   host, (int)tcpi.tcpi_unacked, (int)tcpi.tcpi_snd_cwnd, int (max_rate / TICK));//D
-              send_packet_printf ("drawinfo %d Due to possible network congestion, your output-rate has been reduced to %dbps.",
-                                  NDI_RED, int (max_rate / TICK));
             }
         }
-#endif
-      if (!overload)
-        {
-          int ol = outputbuffer_len ();
-          rate_avail = min (max_rate, rate_avail + max_rate);
-          rate_avail -= ol;
-          int avail = rate_avail;
-          // if we can split images, transfer up to mss-sized packets if possible
-          // but never 768 bytes more.
-          if (fxix) avail += min (768, mss - (ol % mss));
-          bg_scrub = BG_SCRUB_RATE;
-          while (avail > 0)
-            {
-              ixsend &ix = ixface.back ();
-              if (facedata *d = face_data (ix.idx, faceset))
-                {
-                  if (fxix)
-                    {
-                      // only transfer something if the amount of data transferred
-                      // has a healthy relation to the header overhead
-                      if (avail <= 40)
-                        break;
-                      // 9 bytes is enough for fx_FFFOOO
-                      int chunk = min (min (avail, MAXSOCKBUF - 9), (int)ix.ofs);
-                      if (chunk <= 0)
-                        break;
-                      ix.ofs -= chunk;
-                      //fprintf (stderr, "i%dx %6d: %5d+%4d   (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D
-                      packet sl ("ix");
-                      sl << ber32 (ix.idx)
-                         << ber32 (ix.ofs)
-                         << data (d->data.data () + ix.ofs, chunk);
-                      send_packet (sl);
-                    }
-                  else
-                    {
-                      send_image (ix.idx);
-                      ix.ofs = 0;
-                    }
-                }
-              else
-                ix.ofs = 0;
-              int consumed = outputbuffer_len () - ol;
-              avail      -= consumed;
-              rate_avail -= consumed;
-              ol = outputbuffer_len ();
-              if (!ix.ofs)
-                {
-                  ixface.pop_back ();
-                  if (ixface.empty ())
-                    break;
-                }
-            }
-        }
     }
-}
+  rate_avail -= outputbuffer_len ();
+}
+void
+client::flush_sockets (void)
+{
+  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
+    (*i)->flush ();
+}
+void
+client::clock (void)
+{
+  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
+    (*i)->tick ();
+  // give them all the same chances
+  flush_sockets ();
+  //TODO: should not be done here, either
+  for (unsigned i = 0; i < clients.size (); ++i)
+    clients[i]->refcnt_chk ();
+}

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Comparing deliantra/server/socket/loop.C (file contents): Revision 1.63 by root, Sat Jul 28 00:15:03 2007 UTC vs. Revision 1.68 by root, Thu Aug 9 04:11:24 2007 UTC

Diff Legend

Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.63 by root, Sat Jul 28 00:15:03 2007 UTC vs.
Revision 1.68 by root, Thu Aug 9 04:11:24 2007 UTC