Query the Linux device for its MAC address.

[tinc] / src / linux / device.c

diff --git a/src/linux/device.c b/src/linux/device.c
index 3b3b439..3b384d4 100644 (file)
--- a/src/linux/device.c
+++ b/src/linux/device.c
@@ -46,11 +46,6 @@ static char *type = NULL;
 static char ifrname[IFNAMSIZ];
 static char *device_info;
 
-uint64_t device_in_packets = 0;
-uint64_t device_in_bytes = 0;
-uint64_t device_out_packets = 0;
-uint64_t device_out_bytes = 0;
-
 static bool setup_device(void) {
        if(!get_config_string(lookup_config(config_tree, "Device"), &device))
                device = xstrdup(DEFAULT_DEVICE);
@@ -84,6 +79,8 @@ static bool setup_device(void) {
                device_type = DEVICE_TYPE_TUN;
                device_info = "Linux tun/tap device (tun mode)";
        } else {
+               if (routing_mode == RMODE_ROUTER)
+                       overwrite_mac = true;
                ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
                device_type = DEVICE_TYPE_TAP;
                device_info = "Linux tun/tap device (tap mode)";
@@ -108,15 +105,25 @@ static bool setup_device(void) {
 
        logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
 
+       if(ifr.ifr_flags & IFF_TAP) {
+               struct ifreq ifr_mac;
+               if(!ioctl(device_fd, SIOCGIFHWADDR, &ifr_mac))
+                       memcpy(mymac.x, ifr_mac.ifr_hwaddr.sa_data, ETH_ALEN);
+               else
+                       logger(DEBUG_ALWAYS, LOG_WARNING, "Could not get MAC address of %s: %s", device, strerror(errno));
+       }
+
        return true;
 }
 
 static void close_device(void) {
        close(device_fd);
+       device_fd = -1;
 
-       free(type);
-       free(device);
-       free(iface);
+       free(type); type = NULL;
+       free(device); device = NULL;
+       free(iface); iface = NULL;
+       device_info = NULL;
 }
 
 static bool read_packet(vpn_packet_t *packet) {
@@ -150,9 +157,6 @@ static bool read_packet(vpn_packet_t *packet) {
                        abort();
        }
 
-       device_in_packets++;
-       device_in_bytes += packet->len;
-
        logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
                           device_info);
 
@@ -183,22 +187,12 @@ static bool write_packet(vpn_packet_t *packet) {
                        abort();
        }
 
-       device_out_packets++;
-       device_out_bytes += packet->len;
-
        return true;
 }
 
-static void dump_device_stats(void) {
-       logger(DEBUG_ALWAYS, LOG_DEBUG, "Statistics for %s %s:", device_info, device);
-       logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes in:  %10"PRIu64, device_in_bytes);
-       logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes out: %10"PRIu64, device_out_bytes);
-}
-
 const devops_t os_devops = {
        .setup = setup_device,
        .close = close_device,
        .read = read_packet,
        .write = write_packet,
-       .dump_stats = dump_device_stats,
 };