+static bool read_packet(vpn_packet_t *packet) {
+ int inlen;
+
+ switch(device_type) {
+ case DEVICE_TYPE_TUN:
+ inlen = read(device_fd, packet->data + 10, MTU - 10);
+
+ if(inlen <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s",
+ device_info, device, strerror(errno));
+ return false;
+ }
+
+ memset(packet->data, 0, 12);
+ packet->len = inlen + 10;
+ break;
+ case DEVICE_TYPE_TAP:
+ inlen = read(device_fd, packet->data, MTU);
+
+ if(inlen <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s",
+ device_info, device, strerror(errno));
+ return false;
+ }
+
+ packet->len = inlen;
+ break;
+ default:
+ abort();