j3d1/tinc
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Merge branch 'master' into 1.1

Browse source 
Conflicts:
	have.h
	lib/dropin.c
	lib/fake-getaddrinfo.c
	lib/pidfile.c
	src/Makefile.am
	src/bsd/device.c
	src/conf.c
	src/connection.c
	src/connection.h
	src/graph.c
	src/mingw/device.c
	src/net.c
	src/net_setup.c
	src/node.c
	src/protocol_key.c
	src/protocol_misc.c
	src/tincd.c
This commit is contained in:
Guus Sliepen 2009-09-16 19:55:47 +02:00
commit 075e6828a7
43 changed files with 1094 additions and 306 deletions
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289
COPYING Normal file
View file

@ -0,0 +1,289 @@
Copyright (C) 1998-2009 Ivo Timmermans, Guus Sliepen and others.
See the AUTHORS file for a complete list.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
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Foundation's software and to any other program whose authors commit to
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The precise terms and conditions for copying, distribution and
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS

1
THANKS
View file

@ -8,6 +8,7 @@ We would like to thank the following people for their contributions to tinc:
* Cris van Pelt
* Enrique Zanardi
* Flynn Marquardt
* Grzegorz Dymarek
* Hans Bayle
* Ivo van Dong
* James MacLean

18
configure.in
View file

@ -18,7 +18,7 @@ AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])
ALL_LINGUAS="nl"
dnl Checks for programs.
AC_PROG_CC
AC_PROG_CC_C99
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
@ -72,6 +72,20 @@ case $host_os in
;;
esac
AC_ARG_ENABLE(tunemu,
AS_HELP_STRING([--enable-tunemu], [enable support for the tunemu driver]),
[ AC_DEFINE(ENABLE_TUNEMU, 1, [Support for tunemu])
tunemu=true
]
)
AC_ARG_WITH(windows2000,
AS_HELP_STRING([--with-windows2000], [compile with support for Windows 2000. This disables support for tunneling over existing IPv6 networks.]),
[AC_DEFINE(WITH_WINDOWS2000, 1, [Compile with support for Windows 2000])]
)
AM_CONDITIONAL(TUNEMU, test "$tunemu" = true)
AC_CACHE_SAVE
if test -d /sw/include ; then
@ -134,7 +148,7 @@ AC_CHECK_FUNC(gethostbyname, [], [
AC_CHECK_LIB(nsl, gethostbyname)
])
AC_CHECK_FUNCS([freeaddrinfo gai_strerror getaddrinfo getnameinfo inet_aton],
AC_CHECK_DECLS([freeaddrinfo, gai_strerror, getaddrinfo, getnameinfo],
[], [], [#include "have.h"]
)

20
have.h
View file

@ -31,6 +31,17 @@
#include <fcntl.h>
#include <unistd.h>
#ifdef HAVE_MINGW
#ifdef WITH_WINDOWS2000
#define WINVER Windows2000
#else
#define WINVER WindowsXP
#endif
#include <w32api.h>
#include <windows.h>
#include <ws2tcpip.h>
#endif
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#endif
@ -164,13 +175,4 @@
#include <netinet/if_ether.h>
#endif
#ifdef HAVE_MINGW
#include <windows.h>
#include <winsock2.h>
#endif
#ifdef HAVE_LIBEVENT
#include <event.h>
#endif
#endif /* __TINC_SYSTEM_H__ */

35
lib/dropin.c
View file

@ -124,25 +124,34 @@ char *get_current_dir_name(void) {
#ifndef HAVE_ASPRINTF
int asprintf(char **buf, const char *fmt, ...) {
int status;
int result;
va_list ap;
va_start(ap, fmt);
result = vasprintf(buf, fmt, ap);
va_end(ap);
return result;
}
int vasprintf(char **buf, const char *fmt, va_list ap) {
int status;
va_list aq;
int len;
len = 4096;
*buf = xmalloc(len);
va_start(ap, fmt);
status = vsnprintf(*buf, len, fmt, ap);
va_end(ap);
va_copy(aq, ap);
status = vsnprintf(*buf, len, fmt, aq);
va_end(aq);
if(status >= 0)
*buf = xrealloc(*buf, status + 1);
if(status > len - 1) {
len = status;
va_start(ap, fmt);
status = vsnprintf(*buf, len, fmt, ap);
va_end(ap);
va_copy(aq, ap);
status = vsnprintf(*buf, len, fmt, aq);
va_end(aq);
}
return status;
@ -156,15 +165,3 @@ int gettimeofday(struct timeval *tv, void *tz) {
return 0;
}
#endif
#ifndef HAVE_RANDOM
#include <openssl/rand.h>
long int random(void) {
long int x;
RAND_pseudo_bytes((unsigned char *)&x, sizeof(x));
return x;
}
#endif

10
lib/dropin.h
View file

@ -36,19 +36,11 @@ extern char *get_current_dir_name(void);
#ifndef HAVE_ASPRINTF
extern int asprintf(char **, const char *, ...);
#endif
#ifndef HAVE_GETNAMEINFO
extern int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
size_t hostlen, char *serv, size_t servlen, int flags);
extern int vasprintf(char **, const char *, va_list ap);
#endif
#ifndef HAVE_GETTIMEOFDAY
extern int gettimeofday(struct timeval *, void *);
#endif
#ifndef HAVE_RANDOM
extern long int random(void);
#endif
#endif /* __DROPIN_H__ */

7
lib/fake-getaddrinfo.c
View file

@ -16,7 +16,8 @@
#include "fake-getaddrinfo.h"
#include "xalloc.h"
#ifndef HAVE_GAI_STRERROR
#if !HAVE_DECL_GAI_STRERROR
char *gai_strerror(int ecode) {
switch (ecode) {
case EAI_NODATA:
@ -31,7 +32,7 @@ char *gai_strerror(int ecode) {
}
#endif /* !HAVE_GAI_STRERROR */
#ifndef HAVE_FREEADDRINFO
#if !HAVE_DECL_FREEADDRINFO
void freeaddrinfo(struct addrinfo *ai) {
struct addrinfo *next;
@ -43,7 +44,7 @@ void freeaddrinfo(struct addrinfo *ai) {
}
#endif /* !HAVE_FREEADDRINFO */
#ifndef HAVE_GETADDRINFO
#if !HAVE_DECL_GETADDRINFO
static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr) {
struct addrinfo *ai;

6
lib/fake-getaddrinfo.h
View file

@ -33,16 +33,16 @@ struct addrinfo {
};
#endif /* !HAVE_STRUCT_ADDRINFO */
#ifndef HAVE_GETADDRINFO
#if !HAVE_DECL_GETADDRINFO
int getaddrinfo(const char *hostname, const char *servname,
const struct addrinfo *hints, struct addrinfo **res);
#endif /* !HAVE_GETADDRINFO */
#ifndef HAVE_GAI_STRERROR
#if !HAVE_DECL_GAI_STRERROR
char *gai_strerror(int ecode);
#endif /* !HAVE_GAI_STRERROR */
#ifndef HAVE_FREEADDRINFO
#if !HAVE_DECL_FREEADDRINFO
void freeaddrinfo(struct addrinfo *ai);
#endif /* !HAVE_FREEADDRINFO */

2
lib/fake-getnameinfo.c
View file

@ -14,7 +14,7 @@
#include "fake-getnameinfo.h"
#include "fake-getaddrinfo.h"
#ifndef HAVE_GETNAMEINFO
#if !HAVE_DECL_GETNAMEINFO
int getnameinfo(const struct sockaddr *sa, size_t salen, char *host, size_t hostlen, char *serv, size_t servlen, int flags) {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;

2
lib/fake-getnameinfo.h
View file

@ -3,7 +3,7 @@
#ifndef _FAKE_GETNAMEINFO_H
#define _FAKE_GETNAMEINFO_H
#ifndef HAVE_GETNAMEINFO
#if !HAVE_DECL_GETNAMEINFO
int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
size_t hostlen, char *serv, size_t servlen, int flags);
#endif /* !HAVE_GETNAMEINFO */

7
lib/utils.c
View file

@ -96,3 +96,10 @@ const char *winerror(int err) {
}
#endif
unsigned int bitfield_to_int(void *bitfield, size_t size) {
unsigned int value = 0;
if(size > sizeof value)
size = sizeof value;
memcpy(&value, bitfield, size);
return value;
}

2
lib/utils.h
View file

@ -43,4 +43,6 @@ extern const char *winerror(int);
#define strerror(x) ((x)>0?strerror(x):winerror(GetLastError()))
#endif
extern unsigned int bitfield_to_int(void *bitfield, size_t size);
#endif /* __TINC_UTILS_H__ */

3
lib/xalloc.h
View file

@ -24,3 +24,6 @@ void *xcalloc PARAMS ((size_t n, size_t s));
void *xrealloc PARAMS ((void *p, size_t n)) __attribute__ ((__malloc__));
char *xstrdup PARAMS ((const char *s)) __attribute__ ((__malloc__));
extern int xasprintf(char **strp, const char *fmt, ...);
extern int xvasprintf(char **strp, const char *fmt, va_list ap);

20
lib/xmalloc.c
View file

@ -22,6 +22,8 @@
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#if STDC_HEADERS
# include <stdlib.h>
@ -138,3 +140,21 @@ xcalloc (n, s)
}
#endif /* NOT_USED */
int xasprintf(char **strp, const char *fmt, ...) {
int result;
va_list ap;
va_start(ap, fmt);
result = xvasprintf(strp, fmt, ap);
va_end(ap);
return result;
}
int xvasprintf(char **strp, const char *fmt, va_list ap) {
int result = vasprintf(strp, fmt, ap);
if(result < 0) {
fprintf(stderr, "vasprintf() failed: %s\n", strerror(errno));
exit(xalloc_exit_failure);
}
return result;
}

10
src/Makefile.am
View file

@ -11,6 +11,10 @@ tincd_SOURCES = cipher.c conf.c connection.c control.c crypto.c digest.c edge.c
tincctl_SOURCES = tincctl.c rsagen.c
if TUNEMU
tincd_SOURCES += bsd/tunemu.c
endif
nodist_tincd_SOURCES = device.c
DEFAULT_INCLUDES =
@ -18,10 +22,14 @@ DEFAULT_INCLUDES =
INCLUDES = @INCLUDES@ -I$(top_builddir) -I$(top_srcdir)/lib
noinst_HEADERS = cipher.h conf.h connection.h control.h crypto.h device.h digest.h edge.h graph.h logger.h meta.h net.h netutl.h node.h process.h \
protocol.h route.h rsa.h rsagen.h subnet.h
protocol.h route.h rsa.h rsagen.h subnet.h bsd/tunemu.h
LIBS = @LIBS@ @LIBGCRYPT_LIBS@ @LIBINTL@
if TUNEMU
LIBS += -lpcap
endif
tincd_LDADD = \
$(top_builddir)/lib/libvpn.a

74
src/bsd/device.c
View file

@ -29,12 +29,19 @@
#include "utils.h"
#include "xalloc.h"
#ifdef HAVE_TUNEMU
#include "bsd/tunemu.h"
#endif
#define DEFAULT_DEVICE "/dev/tun0"
typedef enum device_type {
DEVICE_TYPE_TUN,
DEVICE_TYPE_TUNIFHEAD,
DEVICE_TYPE_TAP,
#ifdef HAVE_TUNEMU
DEVICE_TYPE_TUNEMU,
#endif
} device_type_t;
int device_fd = -1;
@ -43,7 +50,9 @@ char *iface = NULL;
static char *device_info = NULL;
static int device_total_in = 0;
static int device_total_out = 0;
#if defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD)
#if defined(TUNEMU)
static device_type_t device_type = DEVICE_TYPE_TUNEMU;
#elif defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD)
static device_type_t device_type = DEVICE_TYPE_TUNIFHEAD;
#else
static device_type_t device_type = DEVICE_TYPE_TUN;
@ -60,14 +69,13 @@ bool setup_device(void) {
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return false;
}
if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
if(!strcasecmp(type, "tun"))
/* use default */;
#ifdef HAVE_TUNEMU
else if(!strcasecmp(type, "tunemu"))
device_type = DEVICE_TYPE_TUNEMU;
#endif
else if(!strcasecmp(type, "tunnohead"))
device_type = DEVICE_TYPE_TUN;
else if(!strcasecmp(type, "tunifhead"))
@ -83,6 +91,23 @@ bool setup_device(void) {
device_type = DEVICE_TYPE_TAP;
}
switch(device_type) {
#ifdef HAVE_TUNEMU
case DEVICE_TYPE_TUNEMU: {
char dynamic_name[256] = "";
device_fd = tunemu_open(dynamic_name);
}
break;
#endif
default:
device_fd = open(device, O_RDWR | O_NONBLOCK);
}
if(device_fd < 0) {
logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return false;
}
switch(device_type) {
default:
device_type = DEVICE_TYPE_TUN;
@ -129,6 +154,11 @@ bool setup_device(void) {
overwrite_mac = true;
device_info = _("Generic BSD tap device");
break;
#ifdef HAVE_TUNEMU
case DEVICE_TYPE_TUNEMU:
device_info = _("BSD tunemu device");
break;
#endif
}
logger(LOG_INFO, _("%s is a %s"), device, device_info);
@ -139,7 +169,15 @@ bool setup_device(void) {
void close_device(void) {
cp();
close(device_fd);
switch(device_type) {
#ifdef HAVE_TUNEMU
case DEVICE_TYPE_TUNEMU:
tunemu_close(device_fd);
break;
#endif
default:
close(device_fd);
}
free(device);
free(iface);
@ -152,7 +190,16 @@ bool read_packet(vpn_packet_t *packet) {
switch(device_type) {
case DEVICE_TYPE_TUN:
if((inlen = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
#ifdef HAVE_TUNEMU
case DEVICE_TYPE_TUNEMU:
if(device_type == DEVICE_TYPE_TUNEMU)
inlen = tunemu_read(device_fd, packet->data + 14, MTU - 14);
else
#else
inlen = read(device_fd, packet->data + 14, MTU - 14);
#endif
if(inlen <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
@ -228,6 +275,7 @@ bool read_packet(vpn_packet_t *packet) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"),
packet->len, device_info);
logger(LOG_INFO, "E:fd_read");
return true;
}
@ -283,6 +331,16 @@ bool write_packet(vpn_packet_t *packet) {
}
break;
#ifdef HAVE_TUNEMU
case DEVICE_TYPE_TUNEMU:
if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) {
logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
break;
#endif
default:
return false;
}

386
src/bsd/tunemu.c Normal file
View file

@ -0,0 +1,386 @@
/*
* tunemu - Tun device emulation for Darwin
* Copyright (C) 2009 Friedrich Schöller <friedrich.schoeller@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "tunemu.h"
#include <sys/socket.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include <util.h>
#include <pcap.h>
#include <stdarg.h>
#include <errno.h>
#include <stdint.h>
#include <stdint.h>
#include <ctype.h>
#include <fcntl.h>
#define PPPPROTO_CTL 1
#define PPP_IP 0x21
#define PPP_IPV6 0x57
#define SC_LOOP_TRAFFIC 0x00000200
#define PPPIOCNEWUNIT _IOWR('t', 62, int)
#define PPPIOCSFLAGS _IOW('t', 89, int)
#define PPPIOCSNPMODE _IOW('t', 75, struct npioctl)
#define PPPIOCATTCHAN _IOW('t', 56, int)
#define PPPIOCGCHAN _IOR('t', 55, int)
#define PPPIOCCONNECT _IOW('t', 58, int)
#define PPPIOCGUNIT _IOR('t', 86, int)
struct sockaddr_ppp
{
u_int8_t ppp_len;
u_int8_t ppp_family;
u_int16_t ppp_proto;
u_int32_t ppp_cookie;
};
enum NPmode
{
NPMODE_PASS,
NPMODE_DROP,
NPMODE_ERROR,
NPMODE_QUEUE
};
struct npioctl
{
int protocol;
enum NPmode mode;
};
#define PPP_KEXT_PATH "/System/Library/Extensions/PPP.kext"
#define ERROR_BUFFER_SIZE 1024
char tunemu_error[ERROR_BUFFER_SIZE];
static int pcap_use_count = 0;
static pcap_t *pcap = NULL;
static int data_buffer_length = 0;
static char *data_buffer = NULL;
static void tun_error(char *format, ...)
{
va_list vl;
va_start(vl, format);
vsnprintf(tunemu_error, ERROR_BUFFER_SIZE, format, vl);
va_end(vl);
}
static void tun_noerror()
{
*tunemu_error = 0;
}
static void closeall()
{
int fd = getdtablesize();
while (fd--)
close(fd);
open("/dev/null", O_RDWR, 0);
dup(0);
dup(0);
}
static int ppp_load_kext()
{
int pid = fork();
if (pid < 0)
{
tun_error("fork for ppp kext: %s", strerror(errno));
return -1;
}
if (pid == 0)
{
closeall();
execle("/sbin/kextload", "kextload", PPP_KEXT_PATH, NULL, NULL);
exit(1);
}
int status;
while (waitpid(pid, &status, 0) < 0)
{
if (errno == EINTR)
continue;
tun_error("waitpid for ppp kext: %s", strerror(errno));
return -1;
}
if (WEXITSTATUS(status) != 0)
{
tun_error("could not load ppp kext \"%s\"", PPP_KEXT_PATH);
return -1;
}
tun_noerror();
return 0;
}
static int ppp_new_instance()
{
// create ppp socket
int ppp_sockfd = socket(PF_PPP, SOCK_RAW, PPPPROTO_CTL);
if (ppp_sockfd < 0)
{
if (ppp_load_kext() < 0)
return -1;
ppp_sockfd = socket(PF_PPP, SOCK_RAW, PPPPROTO_CTL);
if (ppp_sockfd < 0)
{
tun_error("creating ppp socket: %s", strerror(errno));
return -1;
}
}
// connect to ppp procotol
struct sockaddr_ppp pppaddr;
pppaddr.ppp_len = sizeof(struct sockaddr_ppp);
pppaddr.ppp_family = AF_PPP;
pppaddr.ppp_proto = PPPPROTO_CTL;
pppaddr.ppp_cookie = 0;
if (connect(ppp_sockfd, (struct sockaddr *)&pppaddr, sizeof(struct sockaddr_ppp)) < 0)
{
tun_error("connecting ppp socket: %s", strerror(errno));
close(ppp_sockfd);
return -1;
}
tun_noerror();
return ppp_sockfd;
}
static int ppp_new_unit(int *unit_number)
{
int fd = ppp_new_instance();
if (fd < 0)
return -1;
// create ppp unit
if (ioctl(fd, PPPIOCNEWUNIT, unit_number) < 0)
{
tun_error("creating ppp unit: %s", strerror(errno));
close(fd);
return -1;
}
tun_noerror();
return fd;
}
static int ppp_setup_unit(int unit_fd)
{
// send traffic to program
int flags = SC_LOOP_TRAFFIC;
if (ioctl(unit_fd, PPPIOCSFLAGS, &flags) < 0)
{
tun_error("setting ppp loopback mode: %s", strerror(errno));
return -1;
}
// allow packets
struct npioctl npi;
npi.protocol = PPP_IP;
npi.mode = NPMODE_PASS;
if (ioctl(unit_fd, PPPIOCSNPMODE, &npi) < 0)
{
tun_error("starting ppp unit: %s", strerror(errno));
return -1;
}
tun_noerror();
return 0;
}
static int open_pcap()
{
if (pcap != NULL)
{
pcap_use_count++;
return 0;
}
char errbuf[PCAP_ERRBUF_SIZE];
pcap = pcap_open_live("lo0", BUFSIZ, 0, 1, errbuf);
pcap_use_count = 1;
if (pcap == NULL)
{
tun_error("opening pcap: %s", errbuf);
return -1;
}
tun_noerror();
return 0;
}
static void close_pcap()
{
if (pcap == NULL)
return;
pcap_use_count--;
if (pcap_use_count == 0)
{
pcap_close(pcap);
pcap = NULL;
}
}
static void allocate_data_buffer(int size)
{
if (data_buffer_length < size)
{
free(data_buffer);
data_buffer_length = size;
data_buffer = malloc(data_buffer_length);
}
}
static void make_device_name(tunemu_device device, int unit_number)
{
snprintf(device, sizeof(tunemu_device), "ppp%d", unit_number);
}
static int check_device_name(tunemu_device device)
{
if (strlen(device) < 4)
return -1;
int unit_number = atoi(device + 3);
if (unit_number < 0 || unit_number > 999)
return -1;
tunemu_device compare;
make_device_name(compare, unit_number);
if (strcmp(device, compare) != 0)
return -1;
return 0;
}
int tunemu_open(tunemu_device device)
{
int ppp_unit_number = -1;
if (device[0] != 0)
{
if (check_device_name(device) < 0)
{
tun_error("invalid device name \"%s\"", device);
return -1;
}
ppp_unit_number = atoi(device + 3);
}
int ppp_unit_fd = ppp_new_unit(&ppp_unit_number);
if (ppp_unit_fd < 0)
return -1;
if (ppp_setup_unit(ppp_unit_fd) < 0)
{
close(ppp_unit_fd);
return -1;
}
if (open_pcap() < 0)
{
close(ppp_unit_fd);
return -1;
}
make_device_name(device, ppp_unit_number);
return ppp_unit_fd;
}
int tunemu_close(int ppp_sockfd)
{
int ret = close(ppp_sockfd);
if (ret == 0)
close_pcap();
return ret;
}
int tunemu_read(int ppp_sockfd, char *buffer, int length)
{
allocate_data_buffer(length + 2);
length = read(ppp_sockfd, data_buffer, length + 2);
if (length < 0)
{
tun_error("reading packet: %s", strerror(errno));
return length;
}
tun_noerror();
length -= 2;
if (length < 0)
return 0;
memcpy(buffer, data_buffer + 2, length);
return length;
}
int tunemu_write(int ppp_sockfd, char *buffer, int length)
{
allocate_data_buffer(length + 4);
data_buffer[0] = 0x02;
data_buffer[1] = 0x00;
data_buffer[2] = 0x00;
data_buffer[3] = 0x00;
memcpy(data_buffer + 4, buffer, length);
if (pcap == NULL)
{
tun_error("pcap not open");
return -1;
}
length = pcap_inject(pcap, data_buffer, length + 4);
if (length < 0)
{
tun_error("injecting packet: %s", pcap_geterr(pcap));
return length;
}
tun_noerror();
length -= 4;
if (length < 0)
return 0;
return length;
}

32
src/bsd/tunemu.h Normal file
View file

@ -0,0 +1,32 @@
/*
* tunemu - Tun device emulation for Darwin
* Copyright (C) 2009 Friedrich Schöller <friedrich.schoeller@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef TUNEMU_H
#define TUNEMU_H
typedef char tunemu_device[7];
extern char tunemu_error[];
int tunemu_open(tunemu_device dev);
int tunemu_close(int fd);
int tunemu_read(int fd, char *buffer, int length);
int tunemu_write(int fd, char *buffer, int length);
#endif

2
src/conf.c
View file

@ -401,7 +401,7 @@ bool read_server_config() {
cp();
asprintf(&fname, "%s/tinc.conf", confbase);
xasprintf(&fname, "%s/tinc.conf", confbase);
x = read_config_file(config_tree, fname);
if(x == -1) { /* System error: complain */

6
src/connection.c
View file

@ -37,7 +37,7 @@ splay_tree_t *connection_tree; /* Meta connections */
connection_t *broadcast;
static int connection_compare(const connection_t *a, const connection_t *b) {
return (void *)a - (void *)b;
return a < b ? -1 : a == b ? 0 : 1;
}
void init_connections(void) {
@ -115,7 +115,7 @@ int dump_connections(struct evbuffer *out) {
if(evbuffer_add_printf(out,
_(" %s at %s options %lx socket %d status %04x\n"),
c->name, c->hostname, c->options, c->socket,
c->status.value) == -1)
bitfield_to_int(&c->status, sizeof c->status)) == -1)
return errno;
}
@ -128,7 +128,7 @@ bool read_connection_config(connection_t *c) {
cp();
asprintf(&fname, "%s/hosts/%s", confbase, c->name);
xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
x = read_config_file(c->config_tree, fname);
free(fname);

5
src/connection.h
View file

@ -32,8 +32,7 @@
#define OPTION_TCPONLY 0x0002
#define OPTION_PMTU_DISCOVERY 0x0004
typedef union connection_status_t {
struct {
typedef struct connection_status_t {
int pinged:1; /* sent ping */
int active:1; /* 1 if active.. */
int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
@ -44,8 +43,6 @@ typedef union connection_status_t {
int decryptin:1; /* 1 if we have to decrypt incoming traffic */
int mst:1; /* 1 if this connection is part of a minimum spanning tree */
int unused:23;
};
uint32_t value;
} connection_status_t;
#include "edge.h"

17
src/graph.c
View file

@ -57,6 +57,7 @@
#include "process.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
/* Implementation of Kruskal's algorithm.
Running time: O(E)
@ -359,18 +360,20 @@ void check_reachability() {
n->minmtu = 0;
n->mtuprobes = 0;
asprintf(&envp[0], "NETNAME=%s", netname ? : "");
asprintf(&envp[1], "DEVICE=%s", device ? : "");
asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
asprintf(&envp[3], "NODE=%s", n->name);
event_del(&n->mtuevent);
xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
xasprintf(&envp[1], "DEVICE=%s", device ? : "");
xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
xasprintf(&envp[3], "NODE=%s", n->name);
sockaddr2str(&n->address, &address, &port);
asprintf(&envp[4], "REMOTEADDRESS=%s", address);
asprintf(&envp[5], "REMOTEPORT=%s", port);
xasprintf(&envp[4], "REMOTEADDRESS=%s", address);
xasprintf(&envp[5], "REMOTEPORT=%s", port);
envp[6] = NULL;
execute_script(n->status.reachable ? "host-up" : "host-down", envp);
asprintf(&name,
xasprintf(&name,
n->status.reachable ? "hosts/%s-up" : "hosts/%s-down",
n->name);
execute_script(name, envp);

5
src/meta.c
View file

@ -35,6 +35,11 @@
bool send_meta(connection_t *c, const char *buffer, int length) {
cp();
if(!c) {
logger(LOG_ERR, _("send_meta() called with NULL pointer!"));
abort();
}
ifdebug(META) logger(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s)"), length,
c->name, c->hostname);

126
src/mingw/device.c
View file

@ -34,7 +34,7 @@
#include "mingw/common.h"
int device_fd = 0;
int device_fd = -1;
static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
@ -45,63 +45,24 @@ static int device_total_out = 0;
extern char *myport;
static struct packetbuf {
uint8_t data[MTU];
length_t len;
} *bufs;
static int nbufs = 64;
static DWORD WINAPI tapreader(void *bla) {
int sock, err, status;
struct addrinfo *ai;
struct addrinfo hint = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_protocol = IPPROTO_TCP,
.ai_flags = 0,
};
unsigned char bufno = 0;
int status;
long len;
OVERLAPPED overlapped;
/* Open a socket to the parent process */
err = getaddrinfo(NULL, myport, &hint, &ai);
if(err || !ai) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno));
return -1;
}
sock = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
if(sock < 0) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno));
freeaddrinfo(ai);
return -1;
}
if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "connect", strerror(errno));
freeaddrinfo(ai);
return -1;
}
freeaddrinfo(ai);
vpn_packet_t packet;
logger(LOG_DEBUG, _("Tap reader running"));
/* Read from tap device and send to parent */
overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
for(;;) {
overlapped.Offset = 0;
overlapped.OffsetHigh = 0;
ResetEvent(overlapped.hEvent);
status = ReadFile(device_handle, bufs[bufno].data, MTU, &len, &overlapped);
status = ReadFile(device_handle, packet.data, MTU, &len, &overlapped);
if(!status) {
if(GetLastError() == ERROR_IO_PENDING) {
@ -115,11 +76,11 @@ static DWORD WINAPI tapreader(void *bla) {
}
}
bufs[bufno].len = len;
if(send(sock, &bufno, 1, 0) <= 0)
return -1;
if(++bufno >= nbufs)
bufno = 0;
EnterCriticalSection(&mutex);
packet.len = len;
packet.priority = 0;
route(myself, &packet);
LeaveCriticalSection(&mutex);
}
}
@ -239,44 +200,6 @@ bool setup_device(void) {
overwrite_mac = 1;
}
/* Set up ringbuffer */
get_config_int(lookup_config(config_tree, "RingBufferSize"), &nbufs);
if(nbufs <= 1)
nbufs = 1;
else if(nbufs > 256)
nbufs = 256;
bufs = xmalloc_and_zero(nbufs * sizeof *bufs);
/* Create a listening socket */
err = getaddrinfo(NULL, myport, &hint, &ai);
if(err || !ai) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno));
return false;
}
sock = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
if(sock < 0) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno));
return false;
}
if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "bind", strerror(errno));
return false;
}
freeaddrinfo(ai);
if(listen(sock, 1)) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "listen", strerror(errno));
return false;
}
/* Start the tap reader */
thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL);
@ -286,15 +209,6 @@ bool setup_device(void) {
return false;
}
/* Wait for the tap reader to connect back to us */
if((device_fd = accept(sock, NULL, 0)) == -1) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "accept", strerror(errno));
return false;
}
closesocket(sock);
/* Set media status for newer TAP-Win32 devices */
status = true;
@ -317,25 +231,7 @@ void close_device(void) {
}
bool read_packet(vpn_packet_t *packet) {
unsigned char bufno;
cp();
if((recv(device_fd, &bufno, 1, 0)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
packet->len = bufs[bufno].len;
memcpy(packet->data, bufs[bufno].data, bufs[bufno].len);
device_total_in += packet->len;
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
device_info);
return true;
return false;
}
bool write_packet(vpn_packet_t *packet) {

2
src/net.h
View file

@ -149,6 +149,8 @@ extern int reload_configuration(void);
#ifndef HAVE_MINGW
#define closesocket(s) close(s)
#else
extern CRITICAL_SECTION mutex;
#endif
#endif /* __TINC_NET_H__ */

19
src/net_packet.c
View file

@ -65,6 +65,11 @@ static void send_mtu_probe_handler(int fd, short events, void *data) {
n->mtuprobes++;
if(!n->status.reachable) {
logger(LOG_DEBUG, _("Trying to send MTU probe to unreachable node %s (%s)"), n->name, n->hostname);
return;
}
if(n->mtuprobes >= 10 && !n->minmtu) {
ifdebug(TRAFFIC) logger(LOG_INFO, _("No response to MTU probes from %s (%s)"), n->name, n->hostname);
return;
@ -77,7 +82,7 @@ static void send_mtu_probe_handler(int fd, short events, void *data) {
return;
}
len = n->minmtu + 1 + random() % (n->maxmtu - n->minmtu);
len = n->minmtu + 1 + rand() % (n->maxmtu - n->minmtu);
if(len < 64)
len = 64;
@ -302,6 +307,11 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
cp();
if(!n->status.reachable) {
ifdebug(TRAFFIC) logger(LOG_INFO, _("Trying to send UDP packet to unreachable node %s (%s)"), n->name, n->hostname);
return;
}
/* Make sure we have a valid key */
if(!n->status.validkey) {
@ -319,9 +329,9 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
return;
}
if(n->options & OPTION_PMTU_DISCOVERY && !n->minmtu && (inpkt->data[12] | inpkt->data[13])) {
if(n->options & OPTION_PMTU_DISCOVERY && inpkt->len > n->minmtu && (inpkt->data[12] | inpkt->data[13])) {
ifdebug(TRAFFIC) logger(LOG_INFO,
_("No minimum MTU established yet for %s (%s), forwarding via TCP"),
_("Packet for %s (%s) larger than minimum MTU, forwarding via TCP"),
n->name, n->hostname);
send_tcppacket(n->nexthop->connection, origpkt);
@ -510,7 +520,8 @@ void handle_incoming_vpn_data(int sock, short events, void *data)
pkt.len = recvfrom(sock, (char *) &pkt.seqno, MAXSIZE, 0, &from.sa, &fromlen);
if(pkt.len < 0) {
logger(LOG_ERR, _("Receiving packet failed: %s"), strerror(errno));
if(errno != EAGAIN && errno != EINTR)
logger(LOG_ERR, _("Receiving packet failed: %s"), strerror(errno));
return;
}

37
src/net_setup.c
View file

@ -108,7 +108,7 @@ bool read_rsa_private_key() {
/* Else, check for PrivateKeyFile statement and read it */
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
asprintf(&fname, "%s/rsa_key.priv", confbase);
xasprintf(&fname, "%s/rsa_key.priv", confbase);
fp = fopen(fname, "r");
@ -178,8 +178,8 @@ bool setup_myself(void) {
myself->connection = new_connection();
init_configuration(&myself->connection->config_tree);
asprintf(&myself->hostname, _("MYSELF"));
asprintf(&myself->connection->hostname, _("MYSELF"));
xasprintf(&myself->hostname, _("MYSELF"));
xasprintf(&myself->connection->hostname, _("MYSELF"));
myself->connection->options = 0;
myself->connection->protocol_version = PROT_CURRENT;
@ -207,7 +207,7 @@ bool setup_myself(void) {
return false;
if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
asprintf(&myport, "655");
xasprintf(&myport, "655");
/* Read in all the subnets specified in the host configuration file */
@ -256,9 +256,12 @@ bool setup_myself(void) {
} else
routing_mode = RMODE_ROUTER;
if(routing_mode == RMODE_ROUTER)
if(!get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) || choice)
myself->options |= OPTION_PMTU_DISCOVERY;
// Enable PMTUDiscovery by default if we are in router mode.
choice = routing_mode == RMODE_ROUTER;
get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice);
if(choice)
myself->options |= OPTION_PMTU_DISCOVERY;
get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
@ -297,7 +300,7 @@ bool setup_myself(void) {
/* Generate packet encryption key */
if(!get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
cipher = xstrdup("blowfish");
cipher = xstrdup("aes256");
if(!cipher_open_by_name(&myself->incipher, cipher)) {
logger(LOG_ERR, _("Unrecognized cipher type!"));
@ -312,7 +315,7 @@ bool setup_myself(void) {
/* Check if we want to use message authentication codes... */
if(!get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
digest = xstrdup("sha1");
digest = xstrdup("sha256");
int maclength = 4;
get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &maclength);
@ -362,10 +365,10 @@ bool setup_myself(void) {
}
/* Run tinc-up script to further initialize the tap interface */
asprintf(&envp[0], "NETNAME=%s", netname ? : "");
asprintf(&envp[1], "DEVICE=%s", device ? : "");
asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
asprintf(&envp[3], "NAME=%s", myself->name);
xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
xasprintf(&envp[1], "DEVICE=%s", device ? : "");
xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
xasprintf(&envp[3], "NAME=%s", myself->name);
envp[4] = NULL;
execute_script("tinc-up", envp);
@ -523,10 +526,10 @@ void close_network_connections(void) {
close(listen_socket[i].udp);
}
asprintf(&envp[0], "NETNAME=%s", netname ? : "");
asprintf(&envp[1], "DEVICE=%s", device ? : "");
asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
asprintf(&envp[3], "NAME=%s", myself->name);
xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
xasprintf(&envp[1], "DEVICE=%s", device ? : "");
xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
xasprintf(&envp[3], "NAME=%s", myself->name);
envp[4] = NULL;
exit_requests();

2
src/net_socket.c
View file

@ -362,7 +362,7 @@ begin:
get_config_string(c->outgoing->cfg, &address);
if(!get_config_string(lookup_config(c->config_tree, "Port"), &port))
asprintf(&port, "655");
xasprintf(&port, "655");
c->outgoing->ai = str2addrinfo(address, port, SOCK_STREAM);
free(address);

4
src/netutl.c
View file

@ -124,7 +124,7 @@ char *sockaddr2hostname(const sockaddr_t *sa) {
cp();
if(sa->sa.sa_family == AF_UNKNOWN) {
asprintf(&str, _("%s port %s"), sa->unknown.address, sa->unknown.port);
xasprintf(&str, _("%s port %s"), sa->unknown.address, sa->unknown.port);
return str;
}
@ -135,7 +135,7 @@ char *sockaddr2hostname(const sockaddr_t *sa) {
gai_strerror(err));
}
asprintf(&str, _("%s port %s"), address, port);
xasprintf(&str, _("%s port %s"), address, port);
return str;
}

8
src/node.c
View file

@ -131,8 +131,8 @@ void node_del(node_t *n) {
edge_del(e);
}
splay_delete(node_tree, n);
splay_delete(node_udp_tree, n);
splay_delete(node_tree, n);
}
node_t *lookup_node(char *name) {
@ -166,12 +166,12 @@ void update_node_udp(node_t *n, const sockaddr_t *sa)
if(sa) {
n->address = *sa;
n->hostname = sockaddr2hostname(&n->address);
splay_delete(node_udp_tree, n);
splay_insert(node_udp_tree, n);
logger(LOG_DEBUG, "UDP address of %s set to %s", n->name, n->hostname);
} else {
memset(&n->address, 0, sizeof n->address);
logger(LOG_DEBUG, "UDP address of %s cleared", n->name);
n->hostname = 0;
ifdebug(PROTOCOL) logger(LOG_DEBUG, "UDP address of %s cleared", n->name);
}
}
@ -186,7 +186,7 @@ int dump_nodes(struct evbuffer *out) {
if(evbuffer_add_printf(out, _(" %s at %s cipher %d digest %d maclength %d compression %d options %lx status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)\n"),
n->name, n->hostname, cipher_get_nid(&n->outcipher),
digest_get_nid(&n->outdigest), digest_length(&n->outdigest), n->outcompression,
n->options, *(uint32_t *)&n->status, n->nexthop ? n->nexthop->name : "-",
n->options, bitfield_to_int(&n->status, sizeof n->status), n->nexthop ? n->nexthop->name : "-",
n->via ? n->via->name : "-", n->distance, n->mtu, n->minmtu, n->maxmtu) == -1)
return errno;
}

19
src/node.h
View file

@ -32,17 +32,14 @@
#include "list.h"
#include "subnet.h"
typedef union node_status_t {
struct {
int unused_active:1; /* 1 if active (not used for nodes) */
int validkey:1; /* 1 if we currently have a valid key for him */
int waitingforkey:1; /* 1 if we already sent out a request */
int visited:1; /* 1 if this node has been visited by one of the graph algorithms */
int reachable:1; /* 1 if this node is reachable in the graph */
int indirect:1; /* 1 if this node is not directly reachable by us */
int unused:26;
};
uint32_t value;
typedef struct node_status_t {
int unused_active:1; /* 1 if active (not used for nodes) */
int validkey:1; /* 1 if we currently have a valid key for him */
int waitingforkey:1; /* 1 if we already sent out a request */
int visited:1; /* 1 if this node has been visited by one of the graph algorithms */
int reachable:1; /* 1 if this node is reachable in the graph */
int indirect:1; /* 1 if this node is not directly reachable by us */
int unused:26;
} node_status_t;
typedef struct node_t {

11
src/process.c
View file

@ -261,28 +261,29 @@ bool detach(void) {
bool execute_script(const char *name, char **envp) {
#ifdef HAVE_SYSTEM
int status, len;
struct stat s;
char *scriptname, *p;
int i;
cp();
#ifndef HAVE_MINGW
len = asprintf(&scriptname, "\"%s/%s\"", confbase, name);
len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
#else
len = asprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
#endif
if(len < 0)
return false;
scriptname[len - 1] = '\0';
#ifndef HAVE_TUNEMU
/* First check if there is a script */
if(stat(scriptname + 1, &s)) {
if(access(scriptname + 1, F_OK)) {
free(scriptname);
return true;
}
#endif
ifdebug(STATUS) logger(LOG_INFO, _("Executing script %s"), name);
@ -405,7 +406,7 @@ void setup_signals(void) {
/* Set a default signal handler for every signal, errors will be
ignored. */
for(i = 0; i < NSIG; i++) {
for(i = 1; i < NSIG; i++) {
if(!do_detach)
act.sa_handler = SIG_DFL;
else

2
src/protocol.c
View file

@ -73,7 +73,7 @@ bool send_request(connection_t *c, const char *format, ...) {
cp();
/* Use vsnprintf instead of vasprintf: faster, no memory
/* Use vsnprintf instead of vxasprintf: faster, no memory
fragmentation, cleanup is automatic, and there is a limit on the
input buffer anyway */

4
src/protocol_edge.c
View file

@ -44,7 +44,7 @@ bool send_add_edge(connection_t *c, const edge_t *e) {
sockaddr2str(&e->address, &address, &port);
x = send_request(c, "%d %lx %s %s %s %s %lx %d", ADD_EDGE, random(),
x = send_request(c, "%d %x %s %s %s %s %lx %d", ADD_EDGE, rand(),
e->from->name, e->to->name, address, port,
e->options, e->weight);
free(address);
@ -175,7 +175,7 @@ bool add_edge_h(connection_t *c, char *request) {
bool send_del_edge(connection_t *c, const edge_t *e) {
cp();
return send_request(c, "%d %lx %s %s", DEL_EDGE, random(),
return send_request(c, "%d %x %s %s", DEL_EDGE, rand(),
e->from->name, e->to->name);
}

2
src/protocol_key.c
View file

@ -46,7 +46,7 @@ bool send_key_changed() {
if(!mykeyused)
return true;
return send_request(broadcast, "%d %lx %s", KEY_CHANGED, random(), myself->name);
return send_request(broadcast, "%d %x %s", KEY_CHANGED, rand(), myself->name);
}
bool key_changed_h(connection_t *c, char *request) {

2
src/protocol_misc.c
View file

@ -154,7 +154,7 @@ bool send_tcppacket(connection_t *c, vpn_packet_t *packet)
/* If there already is a lot of data in the outbuf buffer, discard this packet.
We use a very simple Random Early Drop algorithm. */
if(2.0 * c->buffer->output->off / (double)maxoutbufsize - 1 > drand48())
if(2.0 * c->buffer->output->off / (float)maxoutbufsize - 1 > (float)rand()/(float)RAND_MAX)
return true;
if(!send_request(c, "%d %hd", PACKET, packet->len))

4
src/protocol_subnet.c
View file

@ -42,7 +42,7 @@ bool send_add_subnet(connection_t *c, const subnet_t *subnet)
if(!net2str(netstr, sizeof netstr, subnet))
return false;
return send_request(c, "%d %lx %s %s", ADD_SUBNET, random(), subnet->owner->name, netstr);
return send_request(c, "%d %x %s %s", ADD_SUBNET, rand(), subnet->owner->name, netstr);
}
bool add_subnet_h(connection_t *c, char *request)
@ -161,7 +161,7 @@ bool send_del_subnet(connection_t *c, const subnet_t *s)
if(!net2str(netstr, sizeof netstr, s))
return false;
return send_request(c, "%d %lx %s %s", DEL_SUBNET, random(), s->owner->name, netstr);
return send_request(c, "%d %x %s %s", DEL_SUBNET, rand(), s->owner->name, netstr);
}
bool del_subnet_h(connection_t *c, char *request)

109
src/route.c
View file

@ -97,6 +97,13 @@ static bool checklength(node_t *source, vpn_packet_t *packet, length_t length) {
} else
return true;
}
static void swap_mac_addresses(vpn_packet_t *packet) {
mac_t tmp;
memcpy(&tmp, &packet->data[0], sizeof tmp);
memcpy(&packet->data[0], &packet->data[6], sizeof tmp);
memcpy(&packet->data[6], &tmp, sizeof tmp);
}
static void age_subnets(int fd, short events, void *data)
{
@ -175,40 +182,6 @@ static void learn_mac(mac_t *address)
}
}
static void route_mac(node_t *source, vpn_packet_t *packet)
{
subnet_t *subnet;
mac_t dest;
cp();
/* Learn source address */
if(source == myself) {
mac_t src;
memcpy(&src, &packet->data[6], sizeof src);
learn_mac(&src);
}
/* Lookup destination address */
memcpy(&dest, &packet->data[0], sizeof dest);
subnet = lookup_subnet_mac(&dest);
if(!subnet) {
broadcast_packet(source, packet);
return;
}
if(subnet->owner == source) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Packet looping back to %s (%s)!"), source->name, source->hostname);
return;
}
send_packet(subnet->owner, packet);
}
/* RFC 792 */
static void route_ipv4_unreachable(node_t *source, vpn_packet_t *packet, uint8_t type, uint8_t code)
@ -225,6 +198,10 @@ static void route_ipv4_unreachable(node_t *source, vpn_packet_t *packet, uint8_t
cp();
/* Swap Ethernet source and destination addresses */
swap_mac_addresses(packet);
/* Copy headers from packet into properly aligned structs on the stack */
memcpy(&ip, packet->data + ether_size, ip_size);
@ -421,6 +398,10 @@ static void route_ipv6_unreachable(node_t *source, vpn_packet_t *packet, uint8_t
cp();
/* Swap Ethernet source and destination addresses */
swap_mac_addresses(packet);
/* Copy headers from packet to structs on the stack */
memcpy(&ip6, packet->data + ether_size, ip6_size);
@ -758,6 +739,63 @@ static void route_arp(node_t *source, vpn_packet_t *packet)
send_packet(source, packet);
}
static void route_mac(node_t *source, vpn_packet_t *packet)
{
subnet_t *subnet;
mac_t dest;
cp();
/* Learn source address */
if(source == myself) {
mac_t src;
memcpy(&src, &packet->data[6], sizeof src);
learn_mac(&src);
}
/* Lookup destination address */
memcpy(&dest, &packet->data[0], sizeof dest);
subnet = lookup_subnet_mac(&dest);
if(!subnet) {
broadcast_packet(source, packet);
return;
}
if(subnet->owner == source) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Packet looping back to %s (%s)!"), source->name, source->hostname);
return;
}
// Handle packets larger than PMTU
node_t *via = (subnet->owner->via == myself) ? subnet->owner->nexthop : subnet->owner->via;
if(via && packet->len > via->mtu && via != myself) {
ifdebug(TRAFFIC) logger(LOG_INFO, _("Packet for %s (%s) length %d larger than MTU %d"), subnet->owner->name, subnet->owner->hostname, packet->len, via->mtu);
uint16_t type = packet->data[12] << 8 | packet->data[13];
if(type == ETH_P_IP) {
if(packet->data[20] & 0x40) {
packet->len = via->mtu;
route_ipv4_unreachable(source, packet, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED);
} else {
fragment_ipv4_packet(via, packet);
}
return;
} else if(type == ETH_P_IPV6) {
packet->len = via->mtu;
route_ipv6_unreachable(source, packet, ICMP6_PACKET_TOO_BIG, 0);
return;
}
}
send_packet(subnet->owner, packet);
}
void route(node_t *source, vpn_packet_t *packet)
{
cp();
@ -768,9 +806,8 @@ void route(node_t *source, vpn_packet_t *packet)
switch (routing_mode) {
case RMODE_ROUTER:
{
uint16_t type;
uint16_t type = packet->data[12] << 8 | packet->data[13];
type = ntohs(*((uint16_t *)(&packet->data[12])));
switch (type) {
case ETH_P_ARP:
route_arp(source, packet);

2
src/solaris/device.c
View file

@ -99,7 +99,7 @@ bool setup_device(void) {
}
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
asprintf(&iface, "tun%d", ppa);
xasprintf(&iface, "tun%d", ppa);
device_info = _("Solaris tun device");

63
src/subnet.c
View file

@ -476,24 +476,23 @@ subnet_t *lookup_subnet_ipv6(const ipv6_t *address)
void subnet_update(node_t *owner, subnet_t *subnet, bool up) {
splay_node_t *node;
int i;
char *envp[8];
char netstr[MAXNETSTR + 7] = "SUBNET=";
char *envp[9] = {0};
char netstr[MAXNETSTR];
char *name, *address, *port;
char empty[] = "";
asprintf(&envp[0], "NETNAME=%s", netname ? : "");
asprintf(&envp[1], "DEVICE=%s", device ? : "");
asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
asprintf(&envp[3], "NODE=%s", owner->name);
// Prepare environment variables to be passed to the script
xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
xasprintf(&envp[1], "DEVICE=%s", device ? : "");
xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
xasprintf(&envp[3], "NODE=%s", owner->name);
if(owner != myself) {
sockaddr2str(&owner->address, &address, &port);
asprintf(&envp[4], "REMOTEADDRESS=%s", address);
asprintf(&envp[5], "REMOTEPORT=%s", port);
envp[6] = netstr;
envp[7] = NULL;
} else {
envp[4] = netstr;
envp[5] = NULL;
// 4 and 5 are reserved for SUBNET and WEIGHT
xasprintf(&envp[6], "REMOTEADDRESS=%s", address);
xasprintf(&envp[7], "REMOTEPORT=%s", port);
}
name = up ? "subnet-up" : "subnet-down";
@ -501,22 +500,44 @@ void subnet_update(node_t *owner, subnet_t *subnet, bool up) {
if(!subnet) {
for(node = owner->subnet_tree->head; node; node = node->next) {
subnet = node->data;
if(!net2str(netstr + 7, sizeof netstr - 7, subnet))
if(!net2str(netstr, sizeof netstr, subnet))
continue;
// Strip the weight from the subnet, and put it in its own environment variable
char *weight = strchr(netstr + 7, '#');
if(weight)
*weight++ = 0;
else
weight = empty;
// Prepare the SUBNET and WEIGHT variables
if(envp[4])
free(envp[4]);
if(envp[5])
free(envp[5]);
xasprintf(&envp[4], "SUBNET=%s", netstr);
xasprintf(&envp[5], "WEIGHT=%s", weight);
execute_script(name, envp);
}
} else {
if(net2str(netstr + 7, sizeof netstr - 7, subnet))
if(net2str(netstr + 7, sizeof netstr - 7, subnet)) {
// Strip the weight from the subnet, and put it in its own environment variable
char *weight = strchr(netstr + 7, '#');
if(weight)
*weight++ = 0;
else
weight = empty;
// Prepare the SUBNET and WEIGHT variables
xasprintf(&envp[4], "SUBNET=%s", netstr);
xasprintf(&envp[5], "WEIGHT=%s", weight);
execute_script(name, envp);
}
}
for(i = 0; i < (owner != myself ? 6 : 4); i++)
for(i = 0; envp[i] && i < 9; i++)
free(envp[i]);
if(owner != myself) {
free(address);
free(port);
}
}
int dump_subnets(struct evbuffer *out)

2
src/tincctl.c
View file

@ -440,7 +440,7 @@ int main(int argc, char *argv[], char *envp[]) {
// First handle commands that don't involve connecting to a running tinc daemon.
if(!strcasecmp(argv[optind], "generate-keys")) {
return !keygen(optind > argc ? atoi(argv[optind + 1]) : 1024);
return !keygen(optind > argc ? atoi(argv[optind + 1]) : 2048);
}
if(!strcasecmp(argv[optind], "start")) {

21
src/tincd.c
View file

@ -102,6 +102,7 @@ static struct option const long_options[] = {
#ifdef HAVE_MINGW
static struct WSAData wsa_state;
CRITICAL_SECTION mutex;
#endif
static void usage(bool status)
@ -218,7 +219,7 @@ static void make_names(void)
#endif
if(netname)
asprintf(&identname, "tinc.%s", netname);
xasprintf(&identname, "tinc.%s", netname);
else
identname = xstrdup("tinc");
@ -226,12 +227,12 @@ static void make_names(void)
if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
if(!logfilename)
asprintf(&logfilename, "%s/log/%s.log", identname);
xasprintf(&logfilename, "%s/log/%s.log", identname);
if(!confbase) {
if(netname)
asprintf(&confbase, "%s/%s", installdir, netname);
xasprintf(&confbase, "%s/%s", installdir, netname);
else
asprintf(&confbase, "%s", installdir);
xasprintf(&confbase, "%s", installdir);
}
}
RegCloseKey(key);
@ -241,19 +242,19 @@ static void make_names(void)
#endif
if(!controlsocketname)
asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
xasprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
if(!logfilename)
asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
if(netname) {
if(!confbase)
asprintf(&confbase, CONFDIR "/tinc/%s", netname);
xasprintf(&confbase, CONFDIR "/tinc/%s", netname);
else
logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
} else {
if(!confbase)
asprintf(&confbase, CONFDIR "/tinc");
xasprintf(&confbase, CONFDIR "/tinc");
}
}
@ -314,7 +315,7 @@ static bool drop_privs() {
}
#ifdef HAVE_MINGW
# define setpriority(level) SetPriorityClass(GetCurrentProcess(), level);
# define setpriority(level) SetPriorityClass(GetCurrentProcess(), level)
#else
# define NORMAL_PRIORITY_CLASS 0
# define BELOW_NORMAL_PRIORITY_CLASS 10
@ -393,6 +394,8 @@ int main(int argc, char **argv)
int main2(int argc, char **argv)
{
InitializeCriticalSection(&mutex);
EnterCriticalSection(&mutex);
#endif
if(!detach())

2
src/uml_socket/device.c
View file

@ -70,7 +70,7 @@ bool setup_device(void) {
cp();
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
asprintf(&device, LOCALSTATEDIR "/run/%s.umlsocket", identname);
xasprintf(&device, LOCALSTATEDIR "/run/%s.umlsocket", identname);
get_config_string(lookup_config(config_tree, "Interface"), &iface);