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- Fixed offsets when reading/writing from/to tap device

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This commit is contained in:
Guus Sliepen 2000-10-28 21:25:21 +00:00
parent f25868fd2b
commit 8738c007b1
2 changed files with 28 additions and 14 deletions
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36
src/net.c
View file

@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: net.c,v 1.35.4.47 2000/10/28 21:05:17 guus Exp $
$Id: net.c,v 1.35.4.48 2000/10/28 21:25:20 guus Exp $
*/
#include "config.h"
@ -56,7 +56,7 @@
#include "system.h"
int tap_fd = -1;
int taptype = 0;
int taptype = TAP_TYPE_ETHERTAP;
int total_tap_in = 0;
int total_tap_out = 0;
int total_socket_in = 0;
@ -148,11 +148,21 @@ cp
/* FIXME sometime
add_mac_addresses(&outpkt);
*/
if(write(tap_fd, outpkt.data, outpkt.len) < 0)
syslog(LOG_ERR, _("Can't write to tap device: %m"));
else
total_tap_out += outpkt.len;
if(taptype == TAP_TYPE_TUNTAP)
{
if(write(tap_fd, outpkt.data, outpkt.len) < 0)
syslog(LOG_ERR, _("Can't write to tun/tap device: %m"));
else
total_tap_out += outpkt.len;
}
else /* ethertap */
{
if(write(tap_fd, outpkt.data - 2, outpkt.len + 2) < 0)
syslog(LOG_ERR, _("Can't write to ethertap device: %m"));
else
total_tap_out += outpkt.len + 2;
}
cp
return 0;
}
@ -371,7 +381,7 @@ cp
cp
tap_fd = nfd;
taptype = 0;
taptype = TAP_TYPE_ETHERTAP;
#ifdef HAVE_TUNTAP
/* Ok now check if this is an old ethertap or a new tun/tap thingie */
@ -384,7 +394,7 @@ cp
if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr))
{
syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname);
taptype = 1;
taptype = TAP_TYPE_TUNTAP;
if((cfg = get_config_val(config, tapsubnet)) == NULL)
syslog(LOG_INFO, _("tun/tap device will be left unconfigured"));
@ -1225,7 +1235,7 @@ void handle_tap_input(void)
ipv4_t dest;
int lenin;
cp
if(taptype = 1)
if(taptype == TAP_TYPE_TUNTAP)
{
if((lenin = read(tap_fd, vp.data, MTU)) <= 0)
{
@ -1234,14 +1244,14 @@ cp
}
vp.len = lenin;
}
else
else /* ethertap */
{
if((lenin = read(tap_fd, &vp.len, MTU)) <= 0)
if((lenin = read(tap_fd, vp.data - 2, MTU)) <= 0)
{
syslog(LOG_ERR, _("Error while reading from ethertap device: %m"));
return;
}
// vp.len = lenin - 2;
vp.len = lenin - 2;
}
total_tap_in += lenin;

6
src/net.h
View file

@ -16,7 +16,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: net.h,v 1.9.4.17 2000/10/15 00:59:35 guus Exp $
$Id: net.h,v 1.9.4.18 2000/10/28 21:25:21 guus Exp $
*/
#ifndef __TINC_NET_H__
@ -51,6 +51,10 @@
#define EXPORTINDIRECTDATA 0x0002 /* Used to indicate uplink that it has to tell others to do INDIRECTDATA */
#define TCPONLY 0x0004 /* Tells sender to send packets over TCP instead of UDP (for firewalls) */
/* tap types */
#define TAP_TYPE_ETHERTAP 0
#define TAP_TYPE_TUNTAP 1
typedef struct mac_t
{
unsigned char x[6];