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Commit | Line | Data |
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aba5acdf SH |
1 | /* |
2 | * ipmaddr.c "ip maddress". | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
aba5acdf SH |
16 | #include <fcntl.h> |
17 | #include <sys/ioctl.h> | |
18 | #include <sys/socket.h> | |
e5779fb2 SH |
19 | #include <netinet/in.h> |
20 | #include <arpa/inet.h> | |
21 | #include <string.h> | |
22 | ||
aba5acdf SH |
23 | #include <linux/netdevice.h> |
24 | #include <linux/if.h> | |
25 | #include <linux/if_arp.h> | |
26 | #include <linux/sockios.h> | |
aba5acdf SH |
27 | |
28 | #include "rt_names.h" | |
29 | #include "utils.h" | |
d1f28cf1 | 30 | #include "ip_common.h" |
311dca0a | 31 | #include "json_print.h" |
aba5acdf SH |
32 | |
33 | static struct { | |
34 | char *dev; | |
35 | int family; | |
36 | } filter; | |
37 | ||
38 | static void usage(void) __attribute__((noreturn)); | |
39 | ||
40 | static void usage(void) | |
41 | { | |
8589eb4e MC |
42 | fprintf(stderr, |
43 | "Usage: ip maddr [ add | del ] MULTIADDR dev STRING\n" | |
44 | " ip maddr show [ dev STRING ]\n"); | |
aba5acdf SH |
45 | exit(-1); |
46 | } | |
47 | ||
7f71c0ca | 48 | static int parse_hex(char *str, unsigned char *addr, size_t size) |
aba5acdf | 49 | { |
d947b238 | 50 | int len = 0; |
aba5acdf | 51 | |
7f71c0ca | 52 | while (*str && (len < 2 * size)) { |
aba5acdf | 53 | int tmp; |
56f5daac | 54 | |
aba5acdf SH |
55 | if (str[1] == 0) |
56 | return -1; | |
57 | if (sscanf(str, "%02x", &tmp) != 1) | |
58 | return -1; | |
59 | addr[len] = tmp; | |
60 | len++; | |
61 | str += 2; | |
62 | } | |
63 | return len; | |
64 | } | |
65 | ||
56f5daac | 66 | struct ma_info { |
aba5acdf SH |
67 | struct ma_info *next; |
68 | int index; | |
69 | int users; | |
70 | char *features; | |
71 | char name[IFNAMSIZ]; | |
72 | inet_prefix addr; | |
73 | }; | |
74 | ||
d1f28cf1 | 75 | static void maddr_ins(struct ma_info **lst, struct ma_info *m) |
aba5acdf SH |
76 | { |
77 | struct ma_info *mp; | |
78 | ||
d947b238 | 79 | for (; (mp = *lst) != NULL; lst = &mp->next) { |
aba5acdf SH |
80 | if (mp->index > m->index) |
81 | break; | |
82 | } | |
83 | m->next = *lst; | |
84 | *lst = m; | |
85 | } | |
86 | ||
d1f28cf1 | 87 | static void read_dev_mcast(struct ma_info **result_p) |
aba5acdf SH |
88 | { |
89 | char buf[256]; | |
90 | FILE *fp = fopen("/proc/net/dev_mcast", "r"); | |
91 | ||
92 | if (!fp) | |
93 | return; | |
94 | ||
95 | while (fgets(buf, sizeof(buf), fp)) { | |
96 | char hexa[256]; | |
d17b136f | 97 | struct ma_info m = { .addr.family = AF_PACKET }; |
aba5acdf SH |
98 | int len; |
99 | int st; | |
100 | ||
aba5acdf SH |
101 | sscanf(buf, "%d%s%d%d%s", &m.index, m.name, &m.users, &st, |
102 | hexa); | |
103 | if (filter.dev && strcmp(filter.dev, m.name)) | |
104 | continue; | |
105 | ||
56f5daac | 106 | len = parse_hex(hexa, (unsigned char *)&m.addr.data, sizeof(m.addr.data)); |
aba5acdf SH |
107 | if (len >= 0) { |
108 | struct ma_info *ma = malloc(sizeof(m)); | |
109 | ||
110 | memcpy(ma, &m, sizeof(m)); | |
111 | ma->addr.bytelen = len; | |
112 | ma->addr.bitlen = len<<3; | |
113 | if (st) | |
114 | ma->features = "static"; | |
115 | maddr_ins(result_p, ma); | |
116 | } | |
117 | } | |
118 | fclose(fp); | |
119 | } | |
120 | ||
d1f28cf1 | 121 | static void read_igmp(struct ma_info **result_p) |
aba5acdf | 122 | { |
d17b136f PS |
123 | struct ma_info m = { |
124 | .addr.family = AF_INET, | |
125 | .addr.bitlen = 32, | |
126 | .addr.bytelen = 4, | |
127 | }; | |
aba5acdf SH |
128 | char buf[256]; |
129 | FILE *fp = fopen("/proc/net/igmp", "r"); | |
130 | ||
131 | if (!fp) | |
132 | return; | |
19bcc05b TJ |
133 | if (!fgets(buf, sizeof(buf), fp)) { |
134 | fclose(fp); | |
38c867d2 | 135 | return; |
19bcc05b | 136 | } |
aba5acdf | 137 | |
aba5acdf | 138 | while (fgets(buf, sizeof(buf), fp)) { |
1f7190db | 139 | struct ma_info *ma; |
aba5acdf SH |
140 | |
141 | if (buf[0] != '\t') { | |
21503ed2 MK |
142 | size_t len; |
143 | ||
aba5acdf | 144 | sscanf(buf, "%d%s", &m.index, m.name); |
530903dd PV |
145 | len = strlen(m.name); |
146 | if (m.name[len - 1] == ':') | |
21503ed2 | 147 | m.name[len - 1] = '\0'; |
aba5acdf SH |
148 | continue; |
149 | } | |
150 | ||
21503ed2 | 151 | if (filter.dev && strcmp(filter.dev, m.name)) |
aba5acdf SH |
152 | continue; |
153 | ||
56f5daac | 154 | sscanf(buf, "%08x%d", (__u32 *)&m.addr.data, &m.users); |
aba5acdf SH |
155 | |
156 | ma = malloc(sizeof(m)); | |
157 | memcpy(ma, &m, sizeof(m)); | |
158 | maddr_ins(result_p, ma); | |
159 | } | |
160 | fclose(fp); | |
161 | } | |
162 | ||
163 | ||
d1f28cf1 | 164 | static void read_igmp6(struct ma_info **result_p) |
aba5acdf SH |
165 | { |
166 | char buf[256]; | |
167 | FILE *fp = fopen("/proc/net/igmp6", "r"); | |
168 | ||
169 | if (!fp) | |
170 | return; | |
171 | ||
172 | while (fgets(buf, sizeof(buf), fp)) { | |
173 | char hexa[256]; | |
d17b136f | 174 | struct ma_info m = { .addr.family = AF_INET6 }; |
aba5acdf SH |
175 | int len; |
176 | ||
aba5acdf SH |
177 | sscanf(buf, "%d%s%s%d", &m.index, m.name, hexa, &m.users); |
178 | ||
179 | if (filter.dev && strcmp(filter.dev, m.name)) | |
180 | continue; | |
181 | ||
56f5daac | 182 | len = parse_hex(hexa, (unsigned char *)&m.addr.data, sizeof(m.addr.data)); |
aba5acdf SH |
183 | if (len >= 0) { |
184 | struct ma_info *ma = malloc(sizeof(m)); | |
185 | ||
186 | memcpy(ma, &m, sizeof(m)); | |
187 | ||
188 | ma->addr.bytelen = len; | |
189 | ma->addr.bitlen = len<<3; | |
190 | maddr_ins(result_p, ma); | |
191 | } | |
192 | } | |
193 | fclose(fp); | |
194 | } | |
195 | ||
196 | static void print_maddr(FILE *fp, struct ma_info *list) | |
197 | { | |
311dca0a | 198 | print_string(PRINT_FP, NULL, "\t", NULL); |
aba5acdf | 199 | |
311dca0a | 200 | open_json_object(NULL); |
aba5acdf SH |
201 | if (list->addr.family == AF_PACKET) { |
202 | SPRINT_BUF(b1); | |
311dca0a SH |
203 | |
204 | print_string(PRINT_FP, NULL, "link ", NULL); | |
205 | print_color_string(PRINT_ANY, COLOR_MAC, "link", "%s", | |
206 | ll_addr_n2a((void *)list->addr.data, list->addr.bytelen, | |
207 | 0, b1, sizeof(b1))); | |
aba5acdf | 208 | } else { |
311dca0a SH |
209 | print_string(PRINT_ANY, "family", "%-5s ", |
210 | family_name(list->addr.family)); | |
211 | print_color_string(PRINT_ANY, ifa_family_color(list->addr.family), | |
212 | "address", "%s", | |
213 | format_host(list->addr.family, | |
214 | -1, list->addr.data)); | |
aba5acdf | 215 | } |
311dca0a | 216 | |
aba5acdf | 217 | if (list->users != 1) |
311dca0a SH |
218 | print_uint(PRINT_ANY, "users", " users %u", list->users); |
219 | ||
aba5acdf | 220 | if (list->features) |
311dca0a SH |
221 | print_string(PRINT_ANY, "features", " %s", list->features); |
222 | ||
223 | print_string(PRINT_FP, NULL, "\n", NULL); | |
224 | close_json_object(); | |
aba5acdf SH |
225 | } |
226 | ||
227 | static void print_mlist(FILE *fp, struct ma_info *list) | |
228 | { | |
229 | int cur_index = 0; | |
230 | ||
311dca0a | 231 | new_json_obj(json); |
aba5acdf | 232 | for (; list; list = list->next) { |
311dca0a SH |
233 | |
234 | if (list->index != cur_index || oneline) { | |
235 | if (cur_index) { | |
236 | close_json_array(PRINT_JSON, NULL); | |
237 | close_json_object(); | |
238 | } | |
239 | open_json_object(NULL); | |
240 | ||
241 | print_uint(PRINT_ANY, "ifindex", "%d:", list->index); | |
242 | print_color_string(PRINT_ANY, COLOR_IFNAME, | |
243 | "ifname", "\t%s", list->name); | |
b85076cd | 244 | print_nl(); |
aba5acdf | 245 | cur_index = list->index; |
311dca0a SH |
246 | |
247 | open_json_array(PRINT_JSON, "maddr"); | |
aba5acdf | 248 | } |
311dca0a | 249 | |
aba5acdf SH |
250 | print_maddr(fp, list); |
251 | } | |
311dca0a SH |
252 | if (cur_index) { |
253 | close_json_array(PRINT_JSON, NULL); | |
254 | close_json_object(); | |
255 | } | |
256 | ||
257 | delete_json_obj(); | |
aba5acdf SH |
258 | } |
259 | ||
260 | static int multiaddr_list(int argc, char **argv) | |
261 | { | |
262 | struct ma_info *list = NULL; | |
263 | ||
264 | if (!filter.family) | |
265 | filter.family = preferred_family; | |
266 | ||
267 | while (argc > 0) { | |
268 | if (1) { | |
269 | if (strcmp(*argv, "dev") == 0) { | |
270 | NEXT_ARG(); | |
56f5daac | 271 | } else if (matches(*argv, "help") == 0) |
aba5acdf SH |
272 | usage(); |
273 | if (filter.dev) | |
274 | duparg2("dev", *argv); | |
275 | filter.dev = *argv; | |
276 | } | |
277 | argv++; argc--; | |
278 | } | |
279 | ||
280 | if (!filter.family || filter.family == AF_PACKET) | |
281 | read_dev_mcast(&list); | |
282 | if (!filter.family || filter.family == AF_INET) | |
283 | read_igmp(&list); | |
284 | if (!filter.family || filter.family == AF_INET6) | |
285 | read_igmp6(&list); | |
286 | print_mlist(stdout, list); | |
287 | return 0; | |
288 | } | |
289 | ||
d1f28cf1 | 290 | static int multiaddr_modify(int cmd, int argc, char **argv) |
aba5acdf | 291 | { |
d17b136f | 292 | struct ifreq ifr = {}; |
a5aaca9b | 293 | int family; |
7e7a1d10 | 294 | int fd, len; |
aba5acdf | 295 | |
aba5acdf SH |
296 | if (cmd == RTM_NEWADDR) |
297 | cmd = SIOCADDMULTI; | |
298 | else | |
299 | cmd = SIOCDELMULTI; | |
300 | ||
301 | while (argc > 0) { | |
302 | if (strcmp(*argv, "dev") == 0) { | |
303 | NEXT_ARG(); | |
304 | if (ifr.ifr_name[0]) | |
305 | duparg("dev", *argv); | |
625df645 PS |
306 | if (get_ifname(ifr.ifr_name, *argv)) |
307 | invarg("\"dev\" not a valid ifname", *argv); | |
aba5acdf SH |
308 | } else { |
309 | if (matches(*argv, "address") == 0) { | |
310 | NEXT_ARG(); | |
311 | } | |
312 | if (matches(*argv, "help") == 0) | |
313 | usage(); | |
314 | if (ifr.ifr_hwaddr.sa_data[0]) | |
315 | duparg("address", *argv); | |
7e7a1d10 SH |
316 | len = ll_addr_a2n(ifr.ifr_hwaddr.sa_data, |
317 | sizeof(ifr.ifr_hwaddr.sa_data), | |
318 | *argv); | |
319 | if (len < 0) | |
320 | exit(1); | |
321 | ||
322 | if (len != ETH_ALEN) { | |
323 | fprintf(stderr, "Error: Invalid address length %d - must be %d bytes\n", len, ETH_ALEN); | |
aba5acdf SH |
324 | exit(1); |
325 | } | |
326 | } | |
327 | argc--; argv++; | |
328 | } | |
329 | if (ifr.ifr_name[0] == 0) { | |
330 | fprintf(stderr, "Not enough information: \"dev\" is required.\n"); | |
331 | exit(-1); | |
332 | } | |
333 | ||
a5aaca9b MB |
334 | switch (preferred_family) { |
335 | case AF_INET6: | |
336 | case AF_PACKET: | |
337 | case AF_INET: | |
338 | family = preferred_family; | |
339 | break; | |
340 | default: | |
341 | family = AF_INET; | |
342 | } | |
343 | ||
344 | fd = socket(family, SOCK_DGRAM, 0); | |
aba5acdf SH |
345 | if (fd < 0) { |
346 | perror("Cannot create socket"); | |
347 | exit(1); | |
348 | } | |
56f5daac | 349 | if (ioctl(fd, cmd, (char *)&ifr) != 0) { |
aba5acdf SH |
350 | perror("ioctl"); |
351 | exit(1); | |
352 | } | |
353 | close(fd); | |
354 | ||
355 | exit(0); | |
356 | } | |
357 | ||
358 | ||
359 | int do_multiaddr(int argc, char **argv) | |
360 | { | |
361 | if (argc < 1) | |
362 | return multiaddr_list(0, NULL); | |
363 | if (matches(*argv, "add") == 0) | |
364 | return multiaddr_modify(RTM_NEWADDR, argc-1, argv+1); | |
365 | if (matches(*argv, "delete") == 0) | |
366 | return multiaddr_modify(RTM_DELADDR, argc-1, argv+1); | |
367 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
368 | || matches(*argv, "lst") == 0) | |
369 | return multiaddr_list(argc-1, argv+1); | |
370 | if (matches(*argv, "help") == 0) | |
371 | usage(); | |
372 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip maddr help\".\n", *argv); | |
373 | exit(-1); | |
374 | } |