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, see <http://www.gnu.org/licenses>.
16 */
17 /*
18 * split from ip_tunnel.c
19 */
20 /*
21 * Author:
22 * Masahide NAKAMURA @USAGI
23 */
24
25 #include <stdio.h>
26 #include <string.h>
27 #include <unistd.h>
28 #include <errno.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 IPPROTO_ESP:
55 strcpy(buf, "esp");
56 break;
57 case 0:
58 strcpy(buf, "any");
59 break;
60 default:
61 strcpy(buf, "unknown");
62 break;
63 }
64
65 return buf;
66 }
67
tnl_get_ioctl(const char * basedev,void * p)68 int tnl_get_ioctl(const char *basedev, void *p)
69 {
70 struct ifreq ifr;
71 int fd;
72 int err;
73
74 strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
75 ifr.ifr_ifru.ifru_data = (void*)p;
76
77 fd = socket(preferred_family, SOCK_DGRAM, 0);
78 if (fd < 0) {
79 fprintf(stderr, "create socket failed: %s\n", strerror(errno));
80 return -1;
81 }
82
83 err = ioctl(fd, SIOCGETTUNNEL, &ifr);
84 if (err)
85 fprintf(stderr, "get tunnel \"%s\" failed: %s\n", basedev,
86 strerror(errno));
87
88 close(fd);
89 return err;
90 }
91
tnl_add_ioctl(int cmd,const char * basedev,const char * name,void * p)92 int tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p)
93 {
94 struct ifreq ifr;
95 int fd;
96 int err;
97
98 if (cmd == SIOCCHGTUNNEL && name[0])
99 strncpy(ifr.ifr_name, name, IFNAMSIZ);
100 else
101 strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
102 ifr.ifr_ifru.ifru_data = p;
103
104 fd = socket(preferred_family, SOCK_DGRAM, 0);
105 if (fd < 0) {
106 fprintf(stderr, "create socket failed: %s\n", strerror(errno));
107 return -1;
108 }
109
110 err = ioctl(fd, cmd, &ifr);
111 if (err)
112 fprintf(stderr, "add tunnel \"%s\" failed: %s\n", ifr.ifr_name,
113 strerror(errno));
114 close(fd);
115 return err;
116 }
117
tnl_del_ioctl(const char * basedev,const char * name,void * p)118 int tnl_del_ioctl(const char *basedev, const char *name, void *p)
119 {
120 struct ifreq ifr;
121 int fd;
122 int err;
123
124 if (name[0])
125 strncpy(ifr.ifr_name, name, IFNAMSIZ);
126 else
127 strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
128
129 ifr.ifr_ifru.ifru_data = p;
130
131 fd = socket(preferred_family, SOCK_DGRAM, 0);
132 if (fd < 0) {
133 fprintf(stderr, "create socket failed: %s\n", strerror(errno));
134 return -1;
135 }
136
137 err = ioctl(fd, SIOCDELTUNNEL, &ifr);
138 if (err)
139 fprintf(stderr, "delete tunnel \"%s\" failed: %s\n",
140 ifr.ifr_name, strerror(errno));
141 close(fd);
142 return err;
143 }
144
tnl_gen_ioctl(int cmd,const char * name,void * p,int skiperr)145 static int tnl_gen_ioctl(int cmd, const char *name,
146 void *p, int skiperr)
147 {
148 struct ifreq ifr;
149 int fd;
150 int err;
151
152 strncpy(ifr.ifr_name, name, IFNAMSIZ);
153 ifr.ifr_ifru.ifru_data = p;
154
155 fd = socket(preferred_family, SOCK_DGRAM, 0);
156 if (fd < 0) {
157 fprintf(stderr, "create socket failed: %s\n", strerror(errno));
158 return -1;
159 }
160
161 err = ioctl(fd, cmd, &ifr);
162 if (err && errno != skiperr)
163 fprintf(stderr, "%s: ioctl %x failed: %s\n", name,
164 cmd, strerror(errno));
165 close(fd);
166 return err;
167 }
168
tnl_prl_ioctl(int cmd,const char * name,void * p)169 int tnl_prl_ioctl(int cmd, const char *name, void *p)
170 {
171 return tnl_gen_ioctl(cmd, name, p, -1);
172 }
173
tnl_6rd_ioctl(int cmd,const char * name,void * p)174 int tnl_6rd_ioctl(int cmd, const char *name, void *p)
175 {
176 return tnl_gen_ioctl(cmd, name, p, -1);
177 }
178
tnl_ioctl_get_6rd(const char * name,void * p)179 int tnl_ioctl_get_6rd(const char *name, void *p)
180 {
181 return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL);
182 }
183
tnl_parse_key(const char * name,const char * key)184 __be32 tnl_parse_key(const char *name, const char *key)
185 {
186 unsigned uval;
187
188 if (strchr(key, '.'))
189 return get_addr32(key);
190
191 if (get_unsigned(&uval, key, 0) < 0) {
192 fprintf(stderr, "invalid value for \"%s\": \"%s\";", name, key);
193 fprintf(stderr, " it should be an unsigned integer\n");
194 exit(-1);
195 }
196 return htonl(uval);
197 }
198
199 /* tnl_print_stats - print tunnel statistics
200 *
201 * @buf - tunnel interface's line in /proc/net/dev,
202 * starting past the interface name and following colon
203 */
tnl_print_stats(const char * buf)204 void tnl_print_stats(const char *buf)
205 {
206 unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
207 rx_fifo, rx_frame,
208 tx_bytes, tx_packets, tx_errs, tx_drops,
209 tx_fifo, tx_colls, tx_carrier, rx_multi;
210
211 if (sscanf(buf, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
212 &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
213 &rx_fifo, &rx_frame, &rx_multi,
214 &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
215 &tx_fifo, &tx_colls, &tx_carrier) != 14)
216 return;
217
218 printf("%s", _SL_);
219 printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
220 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
221 rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
222 printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
223 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
224 tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
225 }
226