mirror of
https://github.com/ntop/n2n.git
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149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/**
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* (C) 2007-22 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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#include "n2n.h"
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#ifdef __NetBSD__
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#include <errno.h>
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#include <string.h>
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#include <net/if_tap.h>
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#define N2N_NETBSD_TAPDEVICE_SIZE 32
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void tun_close (tuntap_dev *device);
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int tuntap_open (tuntap_dev *device /* ignored */,
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char *dev,
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const char *address_mode, /* static or dhcp */
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char *device_ip,
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char *device_mask,
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const char * device_mac,
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int mtu) {
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char tap_device[N2N_NETBSD_TAPDEVICE_SIZE];
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struct ifreq req;
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if(dev) {
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snprintf(tap_device, sizeof(tap_device), "/dev/%s", dev);
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device->fd = open(tap_device, O_RDWR);
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snprintf(tap_device, sizeof(tap_device), "%s", dev);
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} else {
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device->fd = open("/dev/tap", O_RDWR);
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if(device->fd >= 0) {
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if(ioctl(device->fd, TAPGIFNAME, &req) == -1) {
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traceEvent(TRACE_ERROR, "Unable to obtain name of tap device (%s)", strerror(errno));
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close(device->fd);
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return -1;
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} else {
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snprintf(tap_device, sizeof(tap_device), req.ifr_name);
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}
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}
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}
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if(device->fd < 0) {
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traceEvent(TRACE_ERROR, "Unable to open tap device (%s)", strerror(errno));
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return -1;
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} else {
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char cmd[256];
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FILE *fd;
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traceEvent(TRACE_NORMAL, "Succesfully open %s", tap_device);
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device->ip_addr = inet_addr(device_ip);
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if(device_mac && device_mac[0] != '\0') {
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// set the hw address before bringing the if up
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snprintf(cmd, sizeof(cmd), "ifconfig %s link %s active", tap_device, device_mac);
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system(cmd);
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}
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snprintf(cmd, sizeof(cmd), "ifconfig %s %s netmask %s mtu %d up", tap_device, device_ip, device_mask, mtu);
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system(cmd);
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traceEvent(TRACE_NORMAL, "Interface %s up and running (%s/%s)", tap_device, device_ip, device_mask);
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// read MAC address
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snprintf(cmd, sizeof(cmd), "ifconfig %s |grep address|cut -c 11-28", tap_device);
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// traceEvent(TRACE_INFO, "%s", cmd);
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fd = popen(cmd, "r");
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if(fd < 0) {
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tun_close(device);
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return -1;
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} else {
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int a, b, c, d, e, f;
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char buf[256];
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buf[0] = 0;
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fgets(buf, sizeof(buf), fd);
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pclose(fd);
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if(buf[0] == '\0') {
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traceEvent(TRACE_ERROR, "Unable to read %s interface MAC address [%s]", tap_device, cmd);
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exit(0);
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}
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traceEvent(TRACE_NORMAL, "Interface %s mac %s", tap_device, buf);
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if(sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x", &a, &b, &c, &d, &e, &f) == 6) {
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device->mac_addr[0] = a, device->mac_addr[1] = b;
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device->mac_addr[2] = c, device->mac_addr[3] = d;
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device->mac_addr[4] = e, device->mac_addr[5] = f;
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}
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}
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}
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// read_mac(dev, device->mac_addr);
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return(device->fd);
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}
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int tuntap_read (struct tuntap_dev *tuntap, unsigned char *buf, int len) {
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return(read(tuntap->fd, buf, len));
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}
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int tuntap_write (struct tuntap_dev *tuntap, unsigned char *buf, int len) {
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return(write(tuntap->fd, buf, len));
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}
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void tuntap_close (struct tuntap_dev *tuntap) {
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close(tuntap->fd);
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}
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// fill out the ip_addr value from the interface, called to pick up dynamic address changes
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void tuntap_get_address (struct tuntap_dev *tuntap) {
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// no action
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}
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#endif /* #ifdef __NetBSD__ */
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