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_get_ioctl(const char *basedev, void *p) 67 { 68 struct ifreq ifr; 69 int fd; 70 int err; 71 72 strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 73 ifr.ifr_ifru.ifru_data = (void*)p; 74 fd = socket(preferred_family, SOCK_DGRAM, 0); 75 err = ioctl(fd, SIOCGETTUNNEL, &ifr); 76 if (err) 77 fprintf(stderr, "get tunnel %s failed: %s\n", basedev, 78 strerror(errno)); 79 80 close(fd); 81 return err; 82 } 83 84 int tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p) 85 { 86 struct ifreq ifr; 87 int fd; 88 int err; 89 90 if (cmd == SIOCCHGTUNNEL && name[0]) 91 strncpy(ifr.ifr_name, name, IFNAMSIZ); 92 else 93 strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 94 ifr.ifr_ifru.ifru_data = p; 95 fd = socket(preferred_family, SOCK_DGRAM, 0); 96 err = ioctl(fd, cmd, &ifr); 97 if (err) 98 fprintf(stderr, "add tunnel %s failed: %s\n", ifr.ifr_name, 99 strerror(errno)); 100 close(fd); 101 return err; 102 } 103 104 int tnl_del_ioctl(const char *basedev, const char *name, void *p) 105 { 106 struct ifreq ifr; 107 int fd; 108 int err; 109 110 if (name[0]) 111 strncpy(ifr.ifr_name, name, IFNAMSIZ); 112 else 113 strncpy(ifr.ifr_name, basedev, IFNAMSIZ); 114 115 ifr.ifr_ifru.ifru_data = p; 116 fd = socket(preferred_family, SOCK_DGRAM, 0); 117 err = ioctl(fd, SIOCDELTUNNEL, &ifr); 118 if (err) 119 fprintf(stderr, "delete tunnel %s failed: %s\n", 120 ifr.ifr_name, strerror(errno)); 121 close(fd); 122 return err; 123 } 124 125 static int tnl_gen_ioctl(int cmd, const char *name, 126 void *p, int skiperr) 127 { 128 struct ifreq ifr; 129 int fd; 130 int err; 131 132 strncpy(ifr.ifr_name, name, IFNAMSIZ); 133 ifr.ifr_ifru.ifru_data = p; 134 fd = socket(preferred_family, SOCK_DGRAM, 0); 135 err = ioctl(fd, cmd, &ifr); 136 if (err && errno != skiperr) 137 fprintf(stderr, "%s: ioctl %x failed: %s\n", name, 138 cmd, strerror(errno)); 139 close(fd); 140 return err; 141 } 142 143 int tnl_prl_ioctl(int cmd, const char *name, void *p) 144 { 145 return tnl_gen_ioctl(cmd, name, p, -1); 146 } 147 148 int tnl_6rd_ioctl(int cmd, const char *name, void *p) 149 { 150 return tnl_gen_ioctl(cmd, name, p, -1); 151 } 152 153 int tnl_ioctl_get_6rd(const char *name, void *p) 154 { 155 return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL); 156 } 157
