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/*
* (C) 2007-09 - Luca Deri <deri@ntop.org>
* (C) 2009 - Alaric Snell-Pym <alaric@kitten-technologies.co.uk>
*
* 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 see <http://www.gnu.org/licenses/>
*/
#include "n2n.h"
#ifdef __NetBSD__
#include <errno.h>
#include <string.h>
#include <net/if_tap.h>
void tun_close(tuntap_dev *device);
/* ********************************** */
#define N2N_NETBSD_TAPDEVICE_SIZE 32
int tuntap_open(tuntap_dev *device /* ignored */,
char *dev,
const char *address_mode, /* static or dhcp */
char *device_ip,
char *device_mask,
const char * device_mac,
int mtu) {
char tap_device[N2N_NETBSD_TAPDEVICE_SIZE];
struct ifreq req;
if(dev) {
snprintf(tap_device, sizeof(tap_device), "/dev/%s", dev);
device->fd = open(tap_device, O_RDWR);
snprintf(tap_device, sizeof(tap_device), "%s", dev);
}
else {
device->fd = open("/dev/tap", O_RDWR);
if(device->fd >= 0) {
if(ioctl(device->fd, TAPGIFNAME, &req) == -1) {
traceEvent(TRACE_ERROR, "Unable to obtain name of tap device (%s)", strerror(errno));
close(device->fd);
return(-1);
}
else {
snprintf(tap_device, sizeof(tap_device), req.ifr_name);
}
}
}
if(device->fd < 0) {
traceEvent(TRACE_ERROR, "Unable to open tap device (%s)", strerror(errno));
return(-1);
} else {
char cmd[256];
FILE *fd;
traceEvent(TRACE_NORMAL, "Succesfully open %s", tap_device);
device->ip_addr = inet_addr(device_ip);
if( device_mac && device_mac[0] != '\0') {
/* Set the hw address before bringing the if up. */
snprintf(cmd, sizeof(cmd), "ifconfig %s link %s active",
tap_device, device_mac);
system(cmd);
}
snprintf(cmd, sizeof(cmd), "ifconfig %s %s netmask %s mtu %d up",
tap_device, device_ip, device_mask, mtu);
system(cmd);
traceEvent(TRACE_NORMAL, "Interface %s up and running (%s/%s)",
tap_device, device_ip, device_mask);
/* Read MAC address */
snprintf(cmd, sizeof(cmd), "ifconfig %s |grep address|cut -c 11-28", tap_device);
/* traceEvent(TRACE_INFO, "%s", cmd); */
fd = popen(cmd, "r");
if(fd < 0) {
tun_close(device);
return(-1);
} else {
int a, b, c, d, e, f;
char buf[256];
buf[0] = 0;
fgets(buf, sizeof(buf), fd);
pclose(fd);
if(buf[0] == '\0') {
traceEvent(TRACE_ERROR, "Unable to read %s interface MAC address [%s]", tap_device, cmd);
exit(0);
}
traceEvent(TRACE_NORMAL, "Interface %s mac %s", tap_device, buf);
if(sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x", &a, &b, &c, &d, &e, &f) == 6) {
device->mac_addr[0] = a, device->mac_addr[1] = b;
device->mac_addr[2] = c, device->mac_addr[3] = d;
device->mac_addr[4] = e, device->mac_addr[5] = f;
}
}
}
/* read_mac(dev, device->mac_addr); */
return(device->fd);
}
/* ********************************** */
int tuntap_read(struct tuntap_dev *tuntap, unsigned char *buf, int len) {
return(read(tuntap->fd, buf, len));
}
/* ********************************** */
int tuntap_write(struct tuntap_dev *tuntap, unsigned char *buf, int len) {
return(write(tuntap->fd, buf, len));
}
/* ********************************** */
void tuntap_close(struct tuntap_dev *tuntap) {
close(tuntap->fd);
}
/* Fill out the ip_addr value from the interface. Called to pick up dynamic
* address changes. */
void tuntap_get_address(struct tuntap_dev *tuntap)
{
}
#endif /* #ifdef __NetBSD__ */