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|
// SoftEther VPN Source Code
// Cedar Communication Module
//
// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
//
// Copyright (c) 2012-2014 Daiyuu Nobori.
// Copyright (c) 2012-2014 SoftEther VPN Project, University of Tsukuba, Japan.
// Copyright (c) 2012-2014 SoftEther Corporation.
//
// All Rights Reserved.
//
// http://www.softether.org/
//
// Author: Daiyuu Nobori
// Contributors:
// - nattoheaven (https://github.com/nattoheaven)
// Comments: Tetsuo Sugiyama, Ph.D.
//
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// version 2 as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License version 2
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
//
//
// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
//
// USE ONLY IN JAPAN. DO NOT USE IT IN OTHER COUNTRIES. IMPORTING THIS
// SOFTWARE INTO OTHER COUNTRIES IS AT YOUR OWN RISK. SOME COUNTRIES
// PROHIBIT ENCRYPTED COMMUNICATIONS. USING THIS SOFTWARE IN OTHER
// COUNTRIES MIGHT BE RESTRICTED.
//
//
// SOURCE CODE CONTRIBUTION
// ------------------------
//
// Your contribution to SoftEther VPN Project is much appreciated.
// Please send patches to us through GitHub.
// Read the SoftEther VPN Patch Acceptance Policy in advance:
// http://www.softether.org/5-download/src/9.patch
//
//
// DEAR SECURITY EXPERTS
// ---------------------
//
// If you find a bug or a security vulnerability please kindly inform us
// about the problem immediately so that we can fix the security problem
// to protect a lot of users around the world as soon as possible.
//
// Our e-mail address for security reports is:
// softether-vpn-security [at] softether.org
//
// Please note that the above e-mail address is not a technical support
// inquiry address. If you need technical assistance, please visit
// http://www.softether.org/ and ask your question on the users forum.
//
// Thank you for your cooperation.
// VLanUnix.c
// Virtual device driver library for UNIX
#include <GlobalConst.h>
#ifdef VLAN_C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <stdarg.h>
#include <time.h>
#include <errno.h>
#include <Mayaqua/Mayaqua.h>
#include <Cedar/Cedar.h>
#ifdef OS_UNIX
static LIST *unix_vlan = NULL;
#ifndef NO_VLAN
// Get the PACKET_ADAPTER
PACKET_ADAPTER *VLanGetPacketAdapter()
{
PACKET_ADAPTER *pa;
pa = NewPacketAdapter(VLanPaInit, VLanPaGetCancel,
VLanPaGetNextPacket, VLanPaPutPacket, VLanPaFree);
if (pa == NULL)
{
return NULL;
}
return pa;
}
// PA initialization
bool VLanPaInit(SESSION *s)
{
VLAN *v;
// Validate arguments
if (s == NULL)
{
return false;
}
// Connect to the driver
v = NewVLan(s->ClientOption->DeviceName, NULL);
if (v == NULL)
{
// Failure
return false;
}
s->PacketAdapter->Param = v;
return true;
}
// Get the cancel object
CANCEL *VLanPaGetCancel(SESSION *s)
{
VLAN *v;
// Validate arguments
if ((s == NULL) || ((v = s->PacketAdapter->Param) == NULL))
{
return NULL;
}
return VLanGetCancel(v);
}
// Release the packet adapter
void VLanPaFree(SESSION *s)
{
VLAN *v;
// Validate arguments
if ((s == NULL) || ((v = s->PacketAdapter->Param) == NULL))
{
return;
}
// End the virtual LAN card
FreeVLan(v);
s->PacketAdapter->Param = NULL;
}
// Write a packet
bool VLanPaPutPacket(SESSION *s, void *data, UINT size)
{
VLAN *v;
// Validate arguments
if ((s == NULL) || ((v = s->PacketAdapter->Param) == NULL))
{
return false;
}
return VLanPutPacket(v, data, size);
}
// Get the next packet
UINT VLanPaGetNextPacket(SESSION *s, void **data)
{
VLAN *v;
UINT size;
// Validate arguments
if (data == NULL || (s == NULL) || ((v = s->PacketAdapter->Param) == NULL))
{
return INFINITE;
}
if (VLanGetNextPacket(v, data, &size) == false)
{
return INFINITE;
}
return size;
}
// Write a packet to the virtual LAN card
bool VLanPutPacket(VLAN *v, void *buf, UINT size)
{
UINT ret;
// Validate arguments
if (v == NULL)
{
return false;
}
if (v->Halt)
{
return false;
}
if (size > MAX_PACKET_SIZE)
{
return false;
}
if (buf == NULL || size == 0)
{
if (buf != NULL)
{
Free(buf);
}
return true;
}
ret = write(v->fd, buf, size);
if (ret >= 1)
{
Free(buf);
return true;
}
if (errno == EAGAIN || ret == 0)
{
Free(buf);
return true;
}
return false;
}
// Get the next packet from the virtual LAN card
bool VLanGetNextPacket(VLAN *v, void **buf, UINT *size)
{
UCHAR tmp[TAP_READ_BUF_SIZE];
int ret;
// Validate arguments
if (v == NULL || buf == NULL || size == 0)
{
return false;
}
if (v->Halt)
{
return false;
}
// Read
ret = read(v->fd, tmp, sizeof(tmp));
if (ret == 0 ||
(ret == -1 && errno == EAGAIN))
{
// No packet
*buf = NULL;
*size = 0;
return true;
}
else if (ret == -1 || ret > TAP_READ_BUF_SIZE)
{
// Error
return false;
}
else
{
// Reading packet success
*buf = Malloc(ret);
Copy(*buf, tmp, ret);
*size = ret;
return true;
}
}
// Get the cancel object
CANCEL *VLanGetCancel(VLAN *v)
{
CANCEL *c;
int fd;
int yes = 0;
// Validate arguments
if (v == NULL)
{
return NULL;
}
c = NewCancel();
UnixDeletePipe(c->pipe_read, c->pipe_write);
c->pipe_read = c->pipe_write = -1;
fd = v->fd;
UnixSetSocketNonBlockingMode(fd, true);
c->SpecialFlag = true;
c->pipe_read = fd;
return c;
}
// Close the Virtual LAN card
void FreeVLan(VLAN *v)
{
// Validate arguments
if (v == NULL)
{
return;
}
Free(v->InstanceName);
Free(v);
}
// Create a tap
VLAN *NewTap(char *name, char *mac_address)
{
int fd;
VLAN *v;
// Validate arguments
if (name == NULL || mac_address == NULL)
{
return NULL;
}
fd = UnixCreateTapDeviceEx(name, "tap", mac_address);
if (fd == -1)
{
return NULL;
}
v = ZeroMalloc(sizeof(VLAN));
v->Halt = false;
v->InstanceName = CopyStr(name);
v->fd = fd;
return v;
}
// Close the tap
void FreeTap(VLAN *v)
{
// Validate arguments
if (v == NULL)
{
return;
}
close(v->fd);
FreeVLan(v);
}
// Get the Virtual LAN card list
VLAN *NewVLan(char *instance_name, VLAN_PARAM *param)
{
int fd;
VLAN *v;
// Validate arguments
if (instance_name == NULL)
{
return NULL;
}
// Open the tap
fd = UnixVLanGet(instance_name);
if (fd == -1)
{
return NULL;
}
v = ZeroMalloc(sizeof(VLAN));
v->Halt = false;
v->InstanceName = CopyStr(instance_name);
v->fd = fd;
return v;
}
// Create a tap device
int UnixCreateTapDeviceEx(char *name, char *prefix, UCHAR *mac_address)
{
int fd;
struct ifreq ifr;
char eth_name[MAX_SIZE];
char instance_name_lower[MAX_SIZE];
struct sockaddr sa;
char *tap_name = TAP_FILENAME_1;
int s;
#ifdef UNIX_MACOS
char tap_macos_name[256] = TAP_MACOS_DIR TAP_MACOS_FILENAME;
#endif
// Validate arguments
if (name == NULL)
{
return -1;
}
// Generate the device name
StrCpy(instance_name_lower, sizeof(instance_name_lower), name);
Trim(instance_name_lower);
StrLower(instance_name_lower);
Format(eth_name, sizeof(eth_name), "%s_%s", prefix, instance_name_lower);
eth_name[15] = 0;
// Open the tun / tap
#ifndef UNIX_MACOS
if (GetOsInfo()->OsType == OSTYPE_LINUX)
{
// Linux
if (IsFile(TAP_FILENAME_1) == false)
{
char tmp[MAX_SIZE];
Format(tmp, sizeof(tmp), "%s c 10 200", TAP_FILENAME_1);
Run("mknod", tmp, true, true);
Format(tmp, sizeof(tmp), "600 %s", TAP_FILENAME_1);
Run("chmod", tmp, true, true);
}
}
// Other than MacOS X
fd = open(TAP_FILENAME_1, O_RDWR);
if (fd == -1)
{
// Failure
fd = open(TAP_FILENAME_2, O_RDWR);
if (fd == -1)
{
return -1;
}
tap_name = TAP_FILENAME_2;
}
#else // UNIX_MACOS
{
int i;
fd = -1;
for (i = 0; i < TAP_MACOS_NUMBER; i++) {
sprintf(tap_macos_name + strlen(TAP_MACOS_DIR TAP_MACOS_FILENAME), "%d", i);
fd = open(tap_macos_name, O_RDWR);
if (fd != -1)
{
tap_name = tap_macos_name;
break;
}
}
if (fd == -1)
{
return -1;
}
}
#endif // UNIX_MACOS
#ifdef UNIX_LINUX
// Create a tap for Linux
// Set the device name
Zero(&ifr, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
StrCpy(ifr.ifr_name, sizeof(ifr.ifr_name), eth_name);
if (ioctl(fd, TUNSETIFF, &ifr) == -1)
{
// Failure
close(fd);
return -1;
}
// MAC address setting
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s != -1)
{
if (mac_address != NULL)
{
Zero(&ifr, sizeof(ifr));
StrCpy(ifr.ifr_name, sizeof(ifr.ifr_name), eth_name);
ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
Copy(&ifr.ifr_addr.sa_data, mac_address, 6);
ioctl(s, SIOCSIFHWADDR, &ifr);
}
Zero(&ifr, sizeof(ifr));
StrCpy(ifr.ifr_name, sizeof(ifr.ifr_name), eth_name);
ioctl(s, SIOCGIFFLAGS, &ifr);
ifr.ifr_flags |= IFF_UP;
ioctl(s, SIOCSIFFLAGS, &ifr);
close(s);
}
#else // UNIX_LINUX
#ifdef UNIX_MACOS
// MAC address setting
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s != -1)
{
char *macos_eth_name;
macos_eth_name = tap_macos_name + strlen(TAP_MACOS_DIR);
if (mac_address != NULL)
{
uint8_t macos_mac_address[19];
Zero(&ifr, sizeof(ifr));
StrCpy(ifr.ifr_name, sizeof(ifr.ifr_name), macos_eth_name);
Copy(&ifr.ifr_addr.sa_data, mac_address, 6);
ioctl(s, SIOCSIFLLADDR, &ifr);
}
Zero(&ifr, sizeof(ifr));
StrCpy(ifr.ifr_name, sizeof(ifr.ifr_name), macos_eth_name);
ioctl(s, SIOCGIFFLAGS, &ifr);
ifr.ifr_flags |= IFF_UP;
ioctl(s, SIOCSIFFLAGS, &ifr);
close(s);
}
#endif // UNIX_MACOS
#ifdef UNIX_SOLARIS
// Create a tap for Solaris
{
int ip_fd;
int tun_fd;
int ppa;
tun_fd = open(tap_name, O_RDWR);
if (tun_fd == -1)
{
// Failure
close(fd);
return -1;
}
ip_fd = open("/dev/ip", O_RDWR);
if (ip_fd == -1)
{
// Failure
close(tun_fd);
close(fd);
return -1;
}
ppa = -1;
ppa = ioctl(tun_fd, TUNNEWPPA, ppa);
if (ppa == -1)
{
// Failure
close(tun_fd);
close(fd);
close(ip_fd);
return -1;
}
if (ioctl(fd, I_PUSH, "ip") < 0)
{
// Failure
close(tun_fd);
close(fd);
close(ip_fd);
return -1;
}
if (ioctl(fd, IF_UNITSEL, (char *)&ppa) < 0)
{
// Failure
close(tun_fd);
close(fd);
close(ip_fd);
return -1;
}
if (ioctl(ip_fd, I_LINK, fd) < 0)
{
// Failure
close(tun_fd);
close(fd);
close(ip_fd);
return -1;
}
close(tun_fd);
close(ip_fd);
}
#endif // UNIX_SOLARIS
#endif // UNIX_LINUX
return fd;
}
int UnixCreateTapDevice(char *name, UCHAR *mac_address)
{
return UnixCreateTapDeviceEx(name, "vpn", mac_address);
}
// Close the tap device
void UnixCloseTapDevice(int fd)
{
// Validate arguments
if (fd == -1)
{
return;
}
close(fd);
}
#else // NO_VLAN
void UnixCloseTapDevice(int fd)
{
}
int UnixCreateTapDeviceEx(char *name, char *prefix, UCHAR *mac_address)
{
return -1;
}
int UnixCreateTapDevice(char *name, UCHAR *mac_address)
{
return -1;
}
#endif // NO_VLAN
// Comparison of the VLAN list entries
int UnixCompareVLan(void *p1, void *p2)
{
UNIX_VLAN_LIST *v1, *v2;
if (p1 == NULL || p2 == NULL)
{
return 0;
}
v1 = *(UNIX_VLAN_LIST **)p1;
v2 = *(UNIX_VLAN_LIST **)p2;
if (v1 == NULL || v2 == NULL)
{
return 0;
}
return StrCmpi(v1->Name, v2->Name);
}
// Initialize the VLAN list
void UnixVLanInit()
{
unix_vlan = NewList(UnixCompareVLan);
}
// Create a VLAN
bool UnixVLanCreateEx(char *name, char *prefix, UCHAR *mac_address)
{
// Validate arguments
char tmp[MAX_SIZE];
if (name == NULL)
{
return false;
}
StrCpy(tmp, sizeof(tmp), name);
Trim(tmp);
name = tmp;
LockList(unix_vlan);
{
UNIX_VLAN_LIST *t, tt;
int fd;
// Check whether a device with the same name exists
Zero(&tt, sizeof(tt));
StrCpy(tt.Name, sizeof(tt.Name), name);
t = Search(unix_vlan, &tt);
if (t != NULL)
{
// Already exist
UnlockList(unix_vlan);
return false;
}
// Create a tap device
fd = UnixCreateTapDeviceEx(name, prefix, mac_address);
if (fd == -1)
{
// Failure to create
UnlockList(unix_vlan);
return false;
}
t = ZeroMalloc(sizeof(UNIX_VLAN_LIST));
t->fd = fd;
StrCpy(t->Name, sizeof(t->Name), name);
Insert(unix_vlan, t);
}
UnlockList(unix_vlan);
return true;
}
bool UnixVLanCreate(char *name, UCHAR *mac_address)
{
return UnixVLanCreateEx(name, "vpn", mac_address);
}
// Enumerate VLANs
TOKEN_LIST *UnixVLanEnum()
{
TOKEN_LIST *ret;
UINT i;
if (unix_vlan == NULL)
{
return NullToken();
}
ret = ZeroMalloc(sizeof(TOKEN_LIST));
LockList(unix_vlan);
{
ret->NumTokens = LIST_NUM(unix_vlan);
ret->Token = ZeroMalloc(sizeof(char *) * ret->NumTokens);
for (i = 0;i < ret->NumTokens;i++)
{
UNIX_VLAN_LIST *t = LIST_DATA(unix_vlan, i);
ret->Token[i] = CopyStr(t->Name);
}
}
UnlockList(unix_vlan);
return ret;
}
// Delete the VLAN
void UnixVLanDelete(char *name)
{
// Validate arguments
if (name == NULL || unix_vlan == NULL)
{
return;
}
LockList(unix_vlan);
{
UINT i;
UNIX_VLAN_LIST *t, tt;
Zero(&tt, sizeof(tt));
StrCpy(tt.Name, sizeof(tt.Name), name);
t = Search(unix_vlan, &tt);
if (t != NULL)
{
UnixCloseTapDevice(t->fd);
Delete(unix_vlan, t);
Free(t);
}
}
UnlockList(unix_vlan);
}
// Get the VLAN
int UnixVLanGet(char *name)
{
int fd = -1;
// Validate arguments
if (name == NULL || unix_vlan == NULL)
{
return -1;
}
LockList(unix_vlan);
{
UINT i;
UNIX_VLAN_LIST *t, tt;
Zero(&tt, sizeof(tt));
StrCpy(tt.Name, sizeof(tt.Name), name);
t = Search(unix_vlan, &tt);
if (t != NULL)
{
fd = t->fd;
}
}
UnlockList(unix_vlan);
return fd;
}
// Release the VLAN list
void UnixVLanFree()
{
UINT i;
for (i = 0;i < LIST_NUM(unix_vlan);i++)
{
UNIX_VLAN_LIST *t = LIST_DATA(unix_vlan, i);
UnixCloseTapDevice(t->fd);
Free(t);
}
ReleaseList(unix_vlan);
unix_vlan = NULL;
}
#endif // OS_UNIX
#endif // VLAN_C
// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
// Department of Computer Science has dozens of overly-enthusiastic geeks.
// Join us: http://www.tsukuba.ac.jp/english/admission/
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