Disable TCP keep-alive and lingering.

mtproto/mtproto-proxy.c

@@ -2092,7 +2092,7 @@ void mtfront_pre_loop (void) {
   }
   if (!workers) {
     for (i = 0; i < http_ports_num; i++) {
-      init_listening_tcpv6_connection (http_sfd[i], &ct_tcp_rpc_ext_server_mtfront, &ext_rpc_methods, enable_ipv6 | SM_LOWPRIO | SM_NOQACK | (max_special_connections ? SM_SPECIAL : 0));
+      init_listening_tcpv6_connection (http_sfd[i], &ct_tcp_rpc_ext_server_mtfront, &ext_rpc_methods, enable_ipv6 | SM_LOWPRIO | (domain_count == 0 ? SM_NOQACK : 0) | (max_special_connections ? SM_SPECIAL : 0));
       // assert (setsockopt (http_sfd[i], IPPROTO_TCP, TCP_MAXSEG, (int[]){1410}, sizeof (int)) >= 0);
       // assert (setsockopt (http_sfd[i], IPPROTO_TCP, TCP_NODELAY, (int[]){1}, sizeof (int)) >= 0);
       if (window_clamp) {

net/net-events.c

@@ -557,8 +557,9 @@ struct in_addr settings_addr;
 
 int server_socket (int port, struct in_addr in_addr, int backlog, int mode) {
   int socket_fd;
-  struct linger ling = {0, 0};
+  // struct linger ling = {0, 0};
   int flags = 1;
+  int enable_tcp_keep_alive = 0;
 
   if ((socket_fd = new_socket (mode, 1)) == -1) {
     return -1;
@@ -574,16 +575,20 @@ int server_socket (int port, struct in_addr in_addr, int backlog, int mode) {
       maximize_sndbuf (socket_fd, 0);
       maximize_rcvbuf (socket_fd, 0);
     }
-    assert (setsockopt (socket_fd, SOL_SOCKET, SO_KEEPALIVE, &flags, sizeof (flags)) >= 0);
     assert (flags == 1);
-    setsockopt (socket_fd, SOL_SOCKET, SO_LINGER, &ling, sizeof (ling));
+    // setsockopt (socket_fd, SOL_SOCKET, SO_LINGER, &ling, sizeof (ling));
     setsockopt (socket_fd, IPPROTO_TCP, TCP_NODELAY, &flags, sizeof (flags));
 
-    int x = 40;
-    assert (setsockopt (socket_fd, IPPROTO_TCP, TCP_KEEPIDLE, &x, sizeof (x)) >= 0);
-    assert (setsockopt (socket_fd, IPPROTO_TCP, TCP_KEEPINTVL, &x, sizeof (x)) >= 0);
-    x = 5;
-    assert (setsockopt (socket_fd, IPPROTO_TCP, TCP_KEEPCNT, &x, sizeof (x)) >= 0);
+    if (enable_tcp_keep_alive) {
+      assert (flags == 1);
+      assert (setsockopt (socket_fd, SOL_SOCKET, SO_KEEPALIVE, &flags, sizeof (flags)) >= 0);
+
+      int x = 40;
+      assert (setsockopt (socket_fd, IPPROTO_TCP, TCP_KEEPIDLE, &x, sizeof (x)) >= 0);
+      assert (setsockopt (socket_fd, IPPROTO_TCP, TCP_KEEPINTVL, &x, sizeof (x)) >= 0);
+      x = 5;
+      assert (setsockopt (socket_fd, IPPROTO_TCP, TCP_KEEPCNT, &x, sizeof (x)) >= 0);
+    }
   }
 
   if (mode & SM_REUSE) {