Add DeviceStandby option to only enable the device when nodes are reachable.

[tinc] / src / net_setup.c

diff --git a/src/net_setup.c b/src/net_setup.c
index f0ccc3c..8c04d00 100644 (file)
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -46,6 +46,7 @@
 char *myport;
 static io_t device_io;
 devops_t devops;
+bool device_standby = false;
 
 char *proxyhost;
 char *proxyport;
@@ -726,6 +727,34 @@ static bool add_listen_address(char *address, bool bindto) {
        return true;
 }
 
+void device_enable(void) {
+       /* Run tinc-up script to further initialize the tap interface */
+
+       char *envp[5] = {NULL};
+       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+       xasprintf(&envp[3], "NAME=%s", myself->name);
+
+       execute_script("tinc-up", envp);
+
+       for(int i = 0; i < 4; i++)
+               free(envp[i]);
+}
+
+void device_disable(void) {
+       char *envp[5] = {NULL};
+       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+       xasprintf(&envp[3], "NAME=%s", myself->name);
+
+       execute_script("tinc-down", envp);
+
+       for(int i = 0; i < 4; i++)
+               free(envp[i]);
+}
+
 /*
   Configure node_t myself and set up the local sockets (listen only)
 */
@@ -918,6 +947,8 @@ static bool setup_myself(void) {
 #endif
        }
 
+       get_config_bool(lookup_config(config_tree, "DeviceStandby"), &device_standby);
+
        if(!devops.setup())
                return false;
 
@@ -1048,18 +1079,8 @@ bool setup_network(void) {
        if(!init_control())
                return false;
 
-       /* Run tinc-up script to further initialize the tap interface */
-
-       char *envp[5] = {NULL};
-       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
-       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
-       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
-       xasprintf(&envp[3], "NAME=%s", myself->name);
-
-       execute_script("tinc-up", envp);
-
-       for(int i = 0; i < 4; i++)
-               free(envp[i]);
+       if (!device_standby)
+               device_enable();
 
        /* Run subnet-up scripts for our own subnets */
 
@@ -1098,25 +1119,17 @@ void close_network_connections(void) {
                close(listen_socket[i].udp.fd);
        }
 
-       char *envp[5] = {NULL};
-       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
-       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
-       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
-       xasprintf(&envp[3], "NAME=%s", myself->name);
-
        exit_requests();
        exit_edges();
        exit_subnets();
        exit_nodes();
        exit_connections();
 
-       execute_script("tinc-down", envp);
+       if (!device_standby)
+               device_disable();
 
        if(myport) free(myport);
 
-       for(int i = 0; i < 4; i++)
-               free(envp[i]);
-
        if (device_fd >= 0)
                io_del(&device_io);
        devops.close();