tunnel.c revision dcfb7a77f8709125e97c313cb8ab6ec4d87468f4
1dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat/* 2dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * Copyright (C)2006 USAGI/WIDE Project 3dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 4dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * This program is free software; you can redistribute it and/or modify 5dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * it under the terms of the GNU General Public License as published by 6dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * the Free Software Foundation; either version 2 of the License, or 7dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * (at your option) any later version. 8dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 9dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * This program is distributed in the hope that it will be useful, 10dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * but WITHOUT ANY WARRANTY; without even the implied warranty of 11dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * GNU General Public License for more details. 13dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 14dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * You should have received a copy of the GNU General Public License 15dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * along with this program; if not, write to the Free Software 16dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat */ 18dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat/* 19dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * split from ip_tunnel.c 20dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat */ 21dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat/* 22dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * Author: 23dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * Masahide NAKAMURA @USAGI 24dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat */ 25dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 26dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <stdio.h> 27dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <string.h> 28dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <unistd.h> 29dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <sys/types.h> 30dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <sys/socket.h> 31dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <sys/ioctl.h> 32dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <netinet/in.h> 33dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/if.h> 34dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/ip.h> 35dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/if_tunnel.h> 36dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 37dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include "utils.h" 38dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include "tunnel.h" 39dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 40dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatconst char *tnl_strproto(__u8 proto) 41dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 42dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat static char buf[16]; 43dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 44dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat switch (proto) { 45dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat case IPPROTO_IPIP: 46dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strcpy(buf, "ip"); 47dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat break; 48dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat case IPPROTO_GRE: 49dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strcpy(buf, "gre"); 50dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat break; 51dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat case IPPROTO_IPV6: 52dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strcpy(buf, "ipv6"); 53dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat break; 54dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat case 0: 55dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strcpy(buf, "any"); 56dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat break; 57dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat default: 58dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strcpy(buf, "unknown"); 59dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat break; 60dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 61dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 62dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return buf; 63dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 64dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 65dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint tnl_ioctl_get_ifindex(const char *dev) 66dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 67dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct ifreq ifr; 68dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 69dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 70dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 71dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, dev, IFNAMSIZ); 72dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 73dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, SIOCGIFINDEX, &ifr); 74dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) { 75dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 76dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return 0; 77dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 78dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 79dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return ifr.ifr_ifindex; 80dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 81dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 82dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint tnl_ioctl_get_iftype(const char *dev) 83dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 84dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct ifreq ifr; 85dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 86dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 87dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 88dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, dev, IFNAMSIZ); 89dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 90dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, SIOCGIFHWADDR, &ifr); 91dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) { 92dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 93dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 94dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 95dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 96dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return ifr.ifr_addr.sa_family; 97dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 98dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 99dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 100dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatchar * tnl_ioctl_get_ifname(int idx) 101dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 102dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat static struct ifreq ifr; 103dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 104dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 105dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 106dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat ifr.ifr_ifindex = idx; 107dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 108dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, SIOCGIFNAME, &ifr); 109dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) { 110dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 111dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return NULL; 112dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 113dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 114dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return ifr.ifr_name; 115dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 116dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 117dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint tnl_get_ioctl(const char *basedev, void *p) 118dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 119dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct ifreq ifr; 120dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 121dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 122dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 123dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 124dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat ifr.ifr_ifru.ifru_data = (void*)p; 125dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 126dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, SIOCGETTUNNEL, &ifr); 127dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) 128dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 129dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 130dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return err; 131dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 132dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 133dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p) 134dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 135dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct ifreq ifr; 136dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 137dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 138dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 139dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (cmd == SIOCCHGTUNNEL && name[0]) 140dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, name, IFNAMSIZ); 141dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else 142dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 143dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat ifr.ifr_ifru.ifru_data = p; 144dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 145dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, cmd, &ifr); 146dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) 147dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 148dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 149dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return err; 150dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 151dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 152dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint tnl_del_ioctl(const char *basedev, const char *name, void *p) 153dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 154dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct ifreq ifr; 155dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 156dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 157dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 158dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (name[0]) 159dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, name, IFNAMSIZ); 160dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else 161dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 162dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat ifr.ifr_ifru.ifru_data = p; 163dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 164dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, SIOCDELTUNNEL, &ifr); 165dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) 166dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 167dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 168dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return err; 169dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 170dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 171dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint tnl_prl_ioctl(int cmd, const char *name, void *p) 172dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 173dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct ifreq ifr; 174dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fd; 175dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int err; 176dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 177dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(ifr.ifr_name, name, IFNAMSIZ); 178dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat ifr.ifr_ifru.ifru_data = p; 179dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fd = socket(preferred_family, SOCK_DGRAM, 0); 180dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat err = ioctl(fd, cmd, &ifr); 181dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (err) 182dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat perror("ioctl"); 183dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat close(fd); 184dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return err; 185dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 186