167 lines
3.3 KiB
C
Executable File
167 lines
3.3 KiB
C
Executable File
/*
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* Copyright (C)2006 USAGI/WIDE Project
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* split from ip_tunnel.c
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*/
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/*
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* Author:
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* Masahide NAKAMURA @USAGI
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <netinet/in.h>
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#include <linux/if.h>
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#include <linux/ip.h>
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#include <linux/if_tunnel.h>
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#include "utils.h"
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#include "tunnel.h"
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const char *tnl_strproto(__u8 proto)
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{
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static char buf[16];
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switch (proto) {
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case IPPROTO_IPIP:
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strcpy(buf, "ip");
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break;
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case IPPROTO_GRE:
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strcpy(buf, "gre");
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break;
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case IPPROTO_IPV6:
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strcpy(buf, "ipv6");
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break;
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default:
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strcpy(buf, "unknown");
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break;
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}
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return buf;
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}
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int tnl_ioctl_get_ifindex(const char *dev)
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{
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struct ifreq ifr;
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int fd;
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int err;
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strncpy(ifr.ifr_name, dev, IFNAMSIZ);
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fd = socket(preferred_family, SOCK_DGRAM, 0);
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err = ioctl(fd, SIOCGIFINDEX, &ifr);
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if (err) {
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perror("ioctl");
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return 0;
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}
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close(fd);
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return ifr.ifr_ifindex;
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}
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int tnl_ioctl_get_iftype(const char *dev)
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{
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struct ifreq ifr;
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int fd;
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int err;
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strncpy(ifr.ifr_name, dev, IFNAMSIZ);
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fd = socket(preferred_family, SOCK_DGRAM, 0);
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err = ioctl(fd, SIOCGIFHWADDR, &ifr);
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if (err) {
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perror("ioctl");
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return -1;
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}
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close(fd);
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return ifr.ifr_addr.sa_family;
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}
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char * tnl_ioctl_get_ifname(int idx)
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{
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static struct ifreq ifr;
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int fd;
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int err;
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ifr.ifr_ifindex = idx;
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fd = socket(preferred_family, SOCK_DGRAM, 0);
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err = ioctl(fd, SIOCGIFNAME, &ifr);
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if (err) {
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perror("ioctl");
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return NULL;
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}
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close(fd);
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return ifr.ifr_name;
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}
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int tnl_get_ioctl(const char *basedev, void *p)
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{
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struct ifreq ifr;
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int fd;
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int err;
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strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
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ifr.ifr_ifru.ifru_data = (void*)p;
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fd = socket(preferred_family, SOCK_DGRAM, 0);
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err = ioctl(fd, SIOCGETTUNNEL, &ifr);
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if (err)
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perror("ioctl");
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close(fd);
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return err;
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}
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int tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p)
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{
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struct ifreq ifr;
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int fd;
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int err;
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if (cmd == SIOCCHGTUNNEL && name[0])
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strncpy(ifr.ifr_name, name, IFNAMSIZ);
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else
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strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
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ifr.ifr_ifru.ifru_data = p;
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fd = socket(preferred_family, SOCK_DGRAM, 0);
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err = ioctl(fd, cmd, &ifr);
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if (err)
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perror("ioctl");
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close(fd);
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return err;
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}
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int tnl_del_ioctl(const char *basedev, const char *name, void *p)
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{
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struct ifreq ifr;
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int fd;
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int err;
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if (name[0])
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strncpy(ifr.ifr_name, name, IFNAMSIZ);
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else
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strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
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ifr.ifr_ifru.ifru_data = p;
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fd = socket(preferred_family, SOCK_DGRAM, 0);
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err = ioctl(fd, SIOCDELTUNNEL, &ifr);
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if (err)
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perror("ioctl");
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close(fd);
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return err;
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}
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