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 <errno.h> 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 #include <sys/ioctl.h> 33 #include <netinet/in.h> 34 #include <linux/if.h> 35 #include <linux/ip.h> 36 #include <linux/if_tunnel.h> 37 38 #include "utils.h" 39 #include "tunnel.h" 40 41 const char *tnl_strproto(__u8 proto) 42 { 43 static char buf[16]; 44 45 switch (proto) { 46 case IPPROTO_IPIP: 47 strcpy(buf, "ip"); 48 break; 49 case IPPROTO_GRE: 50 strcpy(buf, "gre"); 51 break; 52 case IPPROTO_IPV6: 53 strcpy(buf, "ipv6"); 54 break; 55 case 0: 56 strcpy(buf, "any"); 57 break; 58 default: 59 strcpy(buf, "unknown"); 60 break; 61 } 62 63 return buf; 64 } 65 66 int tnl_ioctl_get_ifindex(const char *dev) 67 { 68 struct ifreq ifr; 69 int fd; 70 int err; 71 72 strncpy(ifr.ifr_name, dev, IFNAMSIZ); 73 fd = socket(preferred_family, SOCK_DGRAM, 0); 74 err = ioctl(fd, SIOCGIFINDEX, &ifr); 75 if (err) { 76 perror("ioctl"); 77 return 0; 78 } 79 close(fd); 80 return ifr.ifr_ifindex; 81 } 82 83 int tnl_ioctl_get_iftype(const char *dev) 84 { 85 struct ifreq ifr; 86 int fd; 87 int err; 88 89 strncpy(ifr.ifr_name, dev, IFNAMSIZ); 90 fd = socket(preferred_family, SOCK_DGRAM, 0); 91 err = ioctl(fd, SIOCGIFHWADDR, &ifr); 92 if (err) { 93 perror("ioctl"); 94 return -1; 95 } 96 close(fd); 97 return ifr.ifr_addr.sa_family; 98 } 99 100 101 char * tnl_ioctl_get_ifname(int idx) 102 { 103 static struct ifreq ifr; 104 int fd; 105 int err; 106 107 ifr.ifr_ifindex = idx; 108 fd = socket(preferred_family, SOCK_DGRAM, 0); 109 err = ioctl(fd, SIOCGIFNAME, &ifr); 110 if (err) { 111 perror("ioctl"); 112 return NULL; 113 } 114 close(fd); 115 return ifr.ifr_name; 116 } 117 118 int tnl_get_ioctl(const char *basedev, void *p) 119 { 120 struct ifreq ifr; 121 int fd; 122 int err; 123 124 strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 125 ifr.ifr_ifru.ifru_data = (void*)p; 126 fd = socket(preferred_family, SOCK_DGRAM, 0); 127 err = ioctl(fd, SIOCGETTUNNEL, &ifr); 128 if (err) 129 perror("ioctl"); 130 close(fd); 131 return err; 132 } 133 134 int tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p) 135 { 136 struct ifreq ifr; 137 int fd; 138 int err; 139 140 if (cmd == SIOCCHGTUNNEL && name[0]) 141 strncpy(ifr.ifr_name, name, IFNAMSIZ); 142 else 143 strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 144 ifr.ifr_ifru.ifru_data = p; 145 fd = socket(preferred_family, SOCK_DGRAM, 0); 146 err = ioctl(fd, cmd, &ifr); 147 if (err) 148 perror("ioctl"); 149 close(fd); 150 return err; 151 } 152 153 int tnl_del_ioctl(const char *basedev, const char *name, void *p) 154 { 155 struct ifreq ifr; 156 int fd; 157 int err; 158 159 if (name[0]) 160 strncpy(ifr.ifr_name, name, IFNAMSIZ); 161 else 162 strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 163 ifr.ifr_ifru.ifru_data = p; 164 fd = socket(preferred_family, SOCK_DGRAM, 0); 165 err = ioctl(fd, SIOCDELTUNNEL, &ifr); 166 if (err) 167 perror("ioctl"); 168 close(fd); 169 return err; 170 } 171 172 static int tnl_gen_ioctl(int cmd, const char *name, void *p, int skiperr) 173 { 174 struct ifreq ifr; 175 int fd; 176 int err; 177 178 strncpy(ifr.ifr_name, name, IFNAMSIZ); 179 ifr.ifr_ifru.ifru_data = p; 180 fd = socket(preferred_family, SOCK_DGRAM, 0); 181 err = ioctl(fd, cmd, &ifr); 182 if (err && errno != skiperr) 183 perror("ioctl"); 184 close(fd); 185 return err; 186 } 187 188 int tnl_prl_ioctl(int cmd, const char *name, void *p) 189 { 190 return tnl_gen_ioctl(cmd, name, p, -1); 191 } 192 193 int tnl_6rd_ioctl(int cmd, const char *name, void *p) 194 { 195 return tnl_gen_ioctl(cmd, name, p, -1); 196 } 197 198 int tnl_ioctl_get_6rd(const char *name, void *p) 199 { 200 return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL); 201 } 202
