* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
- * message authentication based on the methodes used by SRTP. It is
+ * message authentication based on the methods used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
- *
*
- * Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org>
+ *
+ * Copyright (C) 2007-2014 Christian Pointner <equinox@anytun.org>
*
* This file is part of uAnytun.
*
* uAnytun is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3 as
- * published by the Free Software Foundation.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
*
* uAnytun is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
*
* You should have received a copy of the GNU General Public License
* along with uAnytun. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL. If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so. If you
+ * do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source
+ * files in the program, then also delete it here.
*/
+#define _GNU_SOURCE
#include <stdio.h>
#include "datatypes.h"
#include <sys/wait.h>
#include <fcntl.h>
#include <sys/ioctl.h>
+#include <sys/uio.h>
#include <arpa/inet.h>
#include <errno.h>
#include <net/if.h>
#define DEFAULT_DEVICE "/dev/net/tun"
#include "log.h"
+#include "sysexec.h"
int tun_init(tun_device_t* dev, const char* dev_name, const char* dev_type, const char* ifcfg_addr, u_int16_t ifcfg_prefix){
- if(!dev)
+ if(!dev)
return -1;
-
+
tun_conf(dev, dev_name, dev_type, ifcfg_addr, ifcfg_prefix, 1400);
dev->actual_name_ = NULL;
- dev->fd_ = open(DEFAULT_DEVICE, O_RDWR);
- if(dev->fd_ < 0) {
+ dev->fd_ = open(DEFAULT_DEVICE, O_RDWR);
+ if(dev->fd_ < 0) {
log_printf(ERROR, "can't open device file (%s): %s", DEFAULT_DEVICE, strerror(errno));
tun_close(dev);
return -1;
}
- struct ifreq ifr;
- memset(&ifr, 0, sizeof(ifr));
+ struct ifreq ifr;
+ memset(&ifr, 0, sizeof(ifr));
if(dev->type_ == TYPE_TUN) {
ifr.ifr_flags = IFF_TUN;
dev->with_pi_ = 1;
- }
+ }
else if(dev->type_ == TYPE_TAP) {
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
dev->with_pi_ = 0;
- }
+ }
else {
log_printf(ERROR, "unable to recognize type of device (tun or tap)");
tun_close(dev);
return -1;
}
- if(dev_name)
- strncpy(ifr.ifr_name, dev_name, IFNAMSIZ);
+ if(dev_name)
+ strncpy(ifr.ifr_name, dev_name, IFNAMSIZ-1);
- if(!ioctl(dev->fd_, TUNSETIFF, &ifr)) {
- dev->actual_name_ = strdup(ifr.ifr_name);
- } else if(!ioctl(dev->fd_, (('T' << 8) | 202), &ifr)) {
- dev->actual_name_ = strdup(ifr.ifr_name);
- } else {
+ if(!ioctl(dev->fd_, TUNSETIFF, &ifr)) {
+ dev->actual_name_ = strdup(ifr.ifr_name);
+ } else if(!ioctl(dev->fd_, (('T' << 8) | 202), &ifr)) {
+ dev->actual_name_ = strdup(ifr.ifr_name);
+ } else {
log_printf(ERROR, "tun/tap device ioctl failed: %s", strerror(errno));
tun_close(dev);
return -1;
int tun_init_post(tun_device_t* dev)
{
// nothing yet
+ return 0;
}
void tun_close(tun_device_t* dev)
{
struct iovec iov[2];
struct tun_pi tpi;
-
+
iov[0].iov_base = &tpi;
iov[0].iov_len = sizeof(tpi);
iov[1].iov_base = buf;
struct iovec iov[2];
struct tun_pi tpi;
struct iphdr *hdr = (struct iphdr *)buf;
-
+
tpi.flags = 0;
if(hdr->version == 4)
tpi.proto = htons(ETH_P_IP);
else
tpi.proto = htons(ETH_P_IPV6);
-
+
iov[0].iov_base = &tpi;
iov[0].iov_len = sizeof(tpi);
iov[1].iov_base = buf;
if(!dev || !dev->actual_name_ || !dev->net_addr_ || !dev->net_mask_)
return;
- char* command = NULL;
- asprintf(&command, "/sbin/ifconfig %s %s netmask %s mtu %d", dev->actual_name_, dev->net_addr_, dev->net_mask_, dev->mtu_);
- if(!command) {
+ char* mtu_str = NULL;
+ int len = asprintf(&mtu_str, "%d", dev->mtu_);
+ if(len == -1) {
log_printf(ERROR, "Execution of ifconfig failed");
return;
}
- int result = system(command);
- if(result == -1)
- log_printf(ERROR, "Execution of ifconfig failed");
- else
- log_printf(NOTICE, "ifconfig returned %d", WEXITSTATUS(result));
+ char* const argv[] = { "/sbin/ifconfig", dev->actual_name_, dev->net_addr_, "netmask", dev->net_mask_, "mtu", mtu_str, NULL };
+ char* const evp[] = { NULL };
+ uanytun_exec("/sbin/ifconfig", argv, evp);
- free(command);
+ free(mtu_str);
}
projects / debian / uanytun.git / blobdiff