Allow connections via UNIX sockets.

[tinc] / src / net_setup.c

diff --git a/src/net_setup.c b/src/net_setup.c
index 0e424ee..15f9f84 100644 (file)
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -808,6 +808,37 @@ static bool setup_myself(void) {
 
        /* Open sockets */
 
+#ifndef HAVE_MINGW
+       int unix_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+       if(unix_fd < 0) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Could not create UNIX socket: %s", sockstrerror(errno));
+               return false;
+       }
+
+       struct sockaddr_un sa;
+       sa.sun_family = AF_UNIX;
+       strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
+
+       if(connect(unix_fd, (struct sockaddr *)&sa, sizeof sa) >= 0) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "UNIX socket %s is still in use!", unixsocketname);
+               return false;
+       }
+
+       unlink(unixsocketname);
+
+       if(bind(unix_fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind UNIX socket to %s: %s", unixsocketname, sockstrerror(errno));
+               return false;
+       }
+
+       if(listen(unix_fd, 3) < 0) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Could not listen on UNIX socket %s: %s", unixsocketname, sockstrerror(errno));
+               return false;
+       }
+
+       io_add(&unix_socket, handle_new_unix_connection, &unix_socket, unix_fd, IO_READ);
+#endif
+
        if(!do_detach && getenv("LISTEN_FDS")) {
                sockaddr_t sa;
                socklen_t salen;
@@ -992,6 +1023,11 @@ void close_network_connections(void) {
                close(listen_socket[i].udp.fd);
        }
 
+#ifndef HAVE_MINGW
+       io_del(&unix_socket);
+       close(unix_socket.fd);
+#endif
+
        char *envp[5];
        xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
        xasprintf(&envp[1], "DEVICE=%s", device ? : "");