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