openvpnctrl: Pass external IP address to N2N daemons.

[people/teissler/ipfire-2.x.git] / src / misc-progs / openvpnctrl.c

diff --git a/src/misc-progs/openvpnctrl.c b/src/misc-progs/openvpnctrl.c
index 2af537272b209fa73c5ff0355d9464946aa5dde9..272db0faade2dc3abb79687ad1d077c7308b4175 100644 (file)
--- a/src/misc-progs/openvpnctrl.c
+++ b/src/misc-progs/openvpnctrl.c
@@ -168,6 +168,29 @@ int readPidFile(const char *pidfile) {
        return pid;
 }
 
+int readExternalAddress(char* address) {
+       FILE *fp = fopen("/var/ipfire/red/local-ipaddress", "r");
+       if (!fp)
+               goto ERROR;
+
+       int r = fscanf(fp, "%s", address);
+       fclose(fp);
+
+       if (r < 0)
+               goto ERROR;
+
+       /* In case the read IP address is not valid, we empty
+        * the content of address and return non-zero. */
+       if (!VALID_IP(address))
+               goto ERROR;
+
+       return 0;
+
+ERROR:
+       address = NULL;
+       return 1;
+}
+
 void ovpnInit(void) {
        // Read OpenVPN configuration
        kv = initkeyvalues();
@@ -482,10 +505,18 @@ int startNet2Net(char *name) {
        // Make sure all firewall rules are up to date.
        setFirewallRules();
 
+       // Get the external IP address.
+       char address[STRING_SIZE] = "";
+       int r = readExternalAddress(address);
+       if (r) {
+               fprintf(stderr, "Could not read the external address\n");
+               exit(1);
+       }
+
        char command[STRING_SIZE];
        snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
        executeCommand(command);
-       snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config %s", configfile);
+       snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --local %s --config %s", address, configfile);
        executeCommand(command);
 
        return 0;