/*
device.c -- Interaction BSD tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2013 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2014 Guus Sliepen <guus@tinc-vpn.org>
2009 Grzegorz Dymarek <gregd72002@googlemail.com>
This program is free software; you can redistribute it and/or modify
#endif
static bool setup_device(void) {
- char *type;
-
- if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
- if(routing_mode == RMODE_ROUTER)
- device = xstrdup(DEFAULT_TUN_DEVICE);
- else
- device = xstrdup(DEFAULT_TAP_DEVICE);
- }
-
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = NULL;
-#ifndef TAPGIFNAME
- if (iface) {
- logger(DEBUG_ALWAYS, LOG_WARNING, "Ignoring specified interface name '%s' as device rename is not supported on this platform", iface);
- free(iface);
- iface = NULL;
- }
-#endif
- if (!iface)
- iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
+ get_config_string(lookup_config(config_tree, "Device"), &device);
+ char *type;
if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
if(!strcasecmp(type, "tun"))
/* use default */;
return false;
}
} else {
- if(strstr(device, "tap") || routing_mode != RMODE_ROUTER)
+ if((device && strstr(device, "tap")) || routing_mode != RMODE_ROUTER)
device_type = DEVICE_TYPE_TAP;
}
+ if(!device) {
+ if(device_type == DEVICE_TYPE_TAP)
+ device = xstrdup(DEFAULT_TAP_DEVICE);
+ else
+ device = xstrdup(DEFAULT_TUN_DEVICE);
+ }
+
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
+ iface = NULL;
+#ifndef TAPGIFNAME
+ if (iface) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Ignoring specified interface name '%s' as device rename is not supported on this platform", iface);
+ free(iface);
+ iface = NULL;
+ }
+#endif
+ if (!iface)
+ iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
+
switch(device_type) {
#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU: {
#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU:
if(device_type == DEVICE_TYPE_TUNEMU)
- inlen = tunemu_read(device_fd, packet->data + 14, MTU - 14);
+ inlen = tunemu_read(device_fd, DATA(packet) + 14, MTU - 14);
else
#endif
- inlen = read(device_fd, packet->data + 14, MTU - 14);
+ inlen = read(device_fd, DATA(packet) + 14, MTU - 14);
if(inlen <= 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
return false;
}
- switch(packet->data[14] >> 4) {
+ switch(DATA(packet)[14] >> 4) {
case 4:
- packet->data[12] = 0x08;
- packet->data[13] = 0x00;
+ DATA(packet)[12] = 0x08;
+ DATA(packet)[13] = 0x00;
break;
case 6:
- packet->data[12] = 0x86;
- packet->data[13] = 0xDD;
+ DATA(packet)[12] = 0x86;
+ DATA(packet)[13] = 0xDD;
break;
default:
logger(DEBUG_TRAFFIC, LOG_ERR,
"Unknown IP version %d while reading packet from %s %s",
- packet->data[14] >> 4, device_info, device);
+ DATA(packet)[14] >> 4, device_info, device);
return false;
}
- memset(packet->data, 0, 12);
+ memset(DATA(packet), 0, 12);
packet->len = inlen + 14;
break;
case DEVICE_TYPE_TUNIFHEAD: {
u_int32_t type;
- struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, MTU - 14}};
+ struct iovec vector[2] = {{&type, sizeof type}, {DATA(packet) + 14, MTU - 14}};
if((inlen = readv(device_fd, vector, 2)) <= 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
switch (ntohl(type)) {
case AF_INET:
- packet->data[12] = 0x08;
- packet->data[13] = 0x00;
+ DATA(packet)[12] = 0x08;
+ DATA(packet)[13] = 0x00;
break;
case AF_INET6:
- packet->data[12] = 0x86;
- packet->data[13] = 0xDD;
+ DATA(packet)[12] = 0x86;
+ DATA(packet)[13] = 0xDD;
break;
default:
return false;
}
- memset(packet->data, 0, 12);
+ memset(DATA(packet), 0, 12);
packet->len = inlen + 10;
break;
}
case DEVICE_TYPE_TAP:
- if((inlen = read(device_fd, packet->data, MTU)) <= 0) {
+ if((inlen = read(device_fd, DATA(packet), MTU)) <= 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
switch(device_type) {
case DEVICE_TYPE_TUN:
- if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
+ if(write(device_fd, DATA(packet) + 14, packet->len - 14) < 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
case DEVICE_TYPE_TUNIFHEAD: {
u_int32_t type;
- struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, packet->len - 14}};
+ struct iovec vector[2] = {{&type, sizeof type}, {DATA(packet) + 14, packet->len - 14}};
int af;
- af = (packet->data[12] << 8) + packet->data[13];
+ af = (DATA(packet)[12] << 8) + DATA(packet)[13];
switch (af) {
case 0x0800:
}
case DEVICE_TYPE_TAP:
- if(write(device_fd, packet->data, packet->len) < 0) {
+ if(write(device_fd, DATA(packet), packet->len) < 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;
#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU:
- if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) {
+ if(tunemu_write(device_fd, DATA(packet) + 14, packet->len - 14) < 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info,
device, strerror(errno));
return false;