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
tnl_strproto(__u8 proto)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
tnl_ioctl_get_ifindex(const char * dev)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
tnl_ioctl_get_iftype(const char * dev)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
tnl_ioctl_get_ifname(int idx)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
tnl_get_ioctl(const char * basedev,void * p)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
tnl_add_ioctl(int cmd,const char * basedev,const char * name,void * p)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
tnl_del_ioctl(const char * basedev,const char * name,void * p)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
tnl_prl_ioctl(int cmd,const char * name,void * p)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