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/*
* (C) 2007-09 - Luca Deri <deri@ntop.org>
*
* 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 _DARWIN_
void tun_close(tuntap_dev *device);
/* ********************************** */
#define N2N_OSX_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) {
int i;
char tap_device[N2N_OSX_TAPDEVICE_SIZE];
for (i = 0; i < 255; i++) {
snprintf(tap_device, sizeof(tap_device), "/dev/tap%d", i);
device->fd = open(tap_device, O_RDWR);
if(device->fd > 0) {
traceEvent(TRACE_NORMAL, "Succesfully open %s", tap_device);
break;
}
}
if(device->fd < 0) {
traceEvent(TRACE_ERROR, "Unable to open tap device");
return(-1);
} else {
char buf[256];
FILE *fd;
device->ip_addr = inet_addr(device_ip);
if ( device_mac && device_mac[0] != '\0' )
{
/* FIXME - This is not tested. Might be wrong syntax for OS X */
/* Set the hw address before bringing the if up. */
snprintf(buf, sizeof(buf), "ifconfig tap%d ether %s",
i, device_mac);
system(buf);
}
snprintf(buf, sizeof(buf), "ifconfig tap%d %s netmask %s mtu %d up",
i, device_ip, device_mask, mtu);
system(buf);
traceEvent(TRACE_NORMAL, "Interface tap%d up and running (%s/%s)",
i, device_ip, device_mask);
/* Read MAC address */
snprintf(buf, sizeof(buf), "ifconfig tap%d |grep ether|cut -c 8-24", i);
/* traceEvent(TRACE_INFO, "%s", buf); */
fd = popen(buf, "r");
if(fd < 0) {
tun_close(device);
return(-1);
} else {
int a, b, c, d, e, f;
buf[0] = 0;
fgets(buf, sizeof(buf), fd);
pclose(fd);
if(buf[0] == '\0') {
traceEvent(TRACE_ERROR, "Unable to read tap%d interface MAC address");
exit(0);
}
traceEvent(TRACE_NORMAL, "Interface tap%d [MTU %d] mac %s", i, mtu, 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 /* _DARWIN_ */