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
41const 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
66int 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
84int 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
104int 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
125static 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
143int tnl_prl_ioctl(int cmd, const char *name, void *p)
144{
145	return tnl_gen_ioctl(cmd, name, p, -1);
146}
147
148int tnl_6rd_ioctl(int cmd, const char *name, void *p)
149{
150	return tnl_gen_ioctl(cmd, name, p, -1);
151}
152
153int tnl_ioctl_get_6rd(const char *name, void *p)
154{
155	return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL);
156}
157