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1 | /* SPDX-License-Identifier: GPL-2.0 */ | |
2 | /* | |
3 | * Get mdb table with netlink | |
4 | */ | |
5 | ||
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8 | #include <unistd.h> | |
9 | #include <fcntl.h> | |
10 | #include <sys/socket.h> | |
11 | #include <net/if.h> | |
12 | #include <netinet/in.h> | |
13 | #include <linux/if_bridge.h> | |
14 | #include <linux/if_ether.h> | |
15 | #include <string.h> | |
16 | #include <arpa/inet.h> | |
17 | #include <json_writer.h> | |
18 | ||
19 | #include "libnetlink.h" | |
20 | #include "br_common.h" | |
21 | #include "rt_names.h" | |
22 | #include "utils.h" | |
23 | ||
24 | #ifndef MDBA_RTA | |
25 | #define MDBA_RTA(r) \ | |
26 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct br_port_msg)))) | |
27 | #endif | |
28 | ||
29 | static unsigned int filter_index, filter_vlan; | |
30 | json_writer_t *jw_global; | |
31 | static bool print_mdb_entries = true; | |
32 | static bool print_mdb_router = true; | |
33 | ||
34 | static void usage(void) | |
35 | { | |
36 | fprintf(stderr, "Usage: bridge mdb { add | del } dev DEV port PORT grp GROUP [permanent | temp] [vid VID]\n"); | |
37 | fprintf(stderr, " bridge mdb {show} [ dev DEV ] [ vid VID ]\n"); | |
38 | exit(-1); | |
39 | } | |
40 | ||
41 | static bool is_temp_mcast_rtr(__u8 type) | |
42 | { | |
43 | return type == MDB_RTR_TYPE_TEMP_QUERY || type == MDB_RTR_TYPE_TEMP; | |
44 | } | |
45 | ||
46 | static void __print_router_port_stats(FILE *f, struct rtattr *pattr) | |
47 | { | |
48 | struct rtattr *tb[MDBA_ROUTER_PATTR_MAX + 1]; | |
49 | struct timeval tv; | |
50 | __u8 type; | |
51 | ||
52 | parse_rtattr(tb, MDBA_ROUTER_PATTR_MAX, MDB_RTR_RTA(RTA_DATA(pattr)), | |
53 | RTA_PAYLOAD(pattr) - RTA_ALIGN(sizeof(uint32_t))); | |
54 | if (tb[MDBA_ROUTER_PATTR_TIMER]) { | |
55 | __jiffies_to_tv(&tv, | |
56 | rta_getattr_u32(tb[MDBA_ROUTER_PATTR_TIMER])); | |
57 | if (jw_global) { | |
58 | char formatted_time[9]; | |
59 | ||
60 | snprintf(formatted_time, sizeof(formatted_time), | |
61 | "%4i.%.2i", (int)tv.tv_sec, | |
62 | (int)tv.tv_usec/10000); | |
63 | jsonw_string_field(jw_global, "timer", formatted_time); | |
64 | } else { | |
65 | fprintf(f, " %4i.%.2i", | |
66 | (int)tv.tv_sec, (int)tv.tv_usec/10000); | |
67 | } | |
68 | } | |
69 | if (tb[MDBA_ROUTER_PATTR_TYPE]) { | |
70 | type = rta_getattr_u8(tb[MDBA_ROUTER_PATTR_TYPE]); | |
71 | if (jw_global) | |
72 | jsonw_string_field(jw_global, "type", | |
73 | is_temp_mcast_rtr(type) ? "temp" : "permanent"); | |
74 | else | |
75 | fprintf(f, " %s", | |
76 | is_temp_mcast_rtr(type) ? "temp" : "permanent"); | |
77 | } | |
78 | } | |
79 | ||
80 | static void br_print_router_ports(FILE *f, struct rtattr *attr, __u32 brifidx) | |
81 | { | |
82 | uint32_t *port_ifindex; | |
83 | struct rtattr *i; | |
84 | int rem; | |
85 | ||
86 | rem = RTA_PAYLOAD(attr); | |
87 | if (jw_global) { | |
88 | jsonw_name(jw_global, ll_index_to_name(brifidx)); | |
89 | jsonw_start_array(jw_global); | |
90 | for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { | |
91 | port_ifindex = RTA_DATA(i); | |
92 | jsonw_start_object(jw_global); | |
93 | jsonw_string_field(jw_global, | |
94 | "port", | |
95 | ll_index_to_name(*port_ifindex)); | |
96 | if (show_stats) | |
97 | __print_router_port_stats(f, i); | |
98 | jsonw_end_object(jw_global); | |
99 | } | |
100 | jsonw_end_array(jw_global); | |
101 | } else { | |
102 | if (!show_stats) | |
103 | fprintf(f, "router ports on %s: ", | |
104 | ll_index_to_name(brifidx)); | |
105 | for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { | |
106 | port_ifindex = RTA_DATA(i); | |
107 | if (show_stats) { | |
108 | fprintf(f, "router ports on %s: %s", | |
109 | ll_index_to_name(brifidx), | |
110 | ll_index_to_name(*port_ifindex)); | |
111 | __print_router_port_stats(f, i); | |
112 | fprintf(f, "\n"); | |
113 | } else{ | |
114 | fprintf(f, "%s ", | |
115 | ll_index_to_name(*port_ifindex)); | |
116 | } | |
117 | } | |
118 | if (!show_stats) | |
119 | fprintf(f, "\n"); | |
120 | } | |
121 | } | |
122 | ||
123 | static void start_json_mdb_flags_array(bool *mdb_flags) | |
124 | { | |
125 | if (*mdb_flags) | |
126 | return; | |
127 | jsonw_name(jw_global, "flags"); | |
128 | jsonw_start_array(jw_global); | |
129 | *mdb_flags = true; | |
130 | } | |
131 | ||
132 | static void print_mdb_entry(FILE *f, int ifindex, struct br_mdb_entry *e, | |
133 | struct nlmsghdr *n, struct rtattr **tb) | |
134 | { | |
135 | SPRINT_BUF(abuf); | |
136 | const void *src; | |
137 | int af; | |
138 | bool mdb_flags = false; | |
139 | ||
140 | if (filter_vlan && e->vid != filter_vlan) | |
141 | return; | |
142 | af = e->addr.proto == htons(ETH_P_IP) ? AF_INET : AF_INET6; | |
143 | src = af == AF_INET ? (const void *)&e->addr.u.ip4 : | |
144 | (const void *)&e->addr.u.ip6; | |
145 | if (jw_global) | |
146 | jsonw_start_object(jw_global); | |
147 | if (n->nlmsg_type == RTM_DELMDB) { | |
148 | if (jw_global) | |
149 | jsonw_string_field(jw_global, "opCode", "deleted"); | |
150 | else | |
151 | fprintf(f, "Deleted "); | |
152 | } | |
153 | if (jw_global) { | |
154 | jsonw_string_field(jw_global, "dev", ll_index_to_name(ifindex)); | |
155 | jsonw_string_field(jw_global, | |
156 | "port", | |
157 | ll_index_to_name(e->ifindex)); | |
158 | jsonw_string_field(jw_global, "grp", inet_ntop(af, src, | |
159 | abuf, sizeof(abuf))); | |
160 | jsonw_string_field(jw_global, "state", | |
161 | (e->state & MDB_PERMANENT) ? "permanent" : "temp"); | |
162 | if (e->flags & MDB_FLAGS_OFFLOAD) { | |
163 | start_json_mdb_flags_array(&mdb_flags); | |
164 | jsonw_string(jw_global, "offload"); | |
165 | } | |
166 | if (mdb_flags) | |
167 | jsonw_end_array(jw_global); | |
168 | } else{ | |
169 | fprintf(f, "dev %s port %s grp %s %s %s", | |
170 | ll_index_to_name(ifindex), | |
171 | ll_index_to_name(e->ifindex), | |
172 | inet_ntop(af, src, abuf, sizeof(abuf)), | |
173 | (e->state & MDB_PERMANENT) ? "permanent" : "temp", | |
174 | (e->flags & MDB_FLAGS_OFFLOAD) ? "offload" : ""); | |
175 | } | |
176 | if (e->vid) { | |
177 | if (jw_global) | |
178 | jsonw_uint_field(jw_global, "vid", e->vid); | |
179 | else | |
180 | fprintf(f, " vid %hu", e->vid); | |
181 | } | |
182 | if (show_stats && tb && tb[MDBA_MDB_EATTR_TIMER]) { | |
183 | struct timeval tv; | |
184 | ||
185 | __jiffies_to_tv(&tv, rta_getattr_u32(tb[MDBA_MDB_EATTR_TIMER])); | |
186 | if (jw_global) { | |
187 | char formatted_time[9]; | |
188 | ||
189 | snprintf(formatted_time, sizeof(formatted_time), | |
190 | "%4i.%.2i", (int)tv.tv_sec, | |
191 | (int)tv.tv_usec/10000); | |
192 | jsonw_string_field(jw_global, "timer", formatted_time); | |
193 | } else { | |
194 | fprintf(f, "%4i.%.2i", (int)tv.tv_sec, | |
195 | (int)tv.tv_usec/10000); | |
196 | } | |
197 | } | |
198 | if (jw_global) | |
199 | jsonw_end_object(jw_global); | |
200 | else | |
201 | fprintf(f, "\n"); | |
202 | } | |
203 | ||
204 | static void br_print_mdb_entry(FILE *f, int ifindex, struct rtattr *attr, | |
205 | struct nlmsghdr *n) | |
206 | { | |
207 | struct rtattr *etb[MDBA_MDB_EATTR_MAX + 1]; | |
208 | struct br_mdb_entry *e; | |
209 | struct rtattr *i; | |
210 | int rem; | |
211 | ||
212 | rem = RTA_PAYLOAD(attr); | |
213 | for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { | |
214 | e = RTA_DATA(i); | |
215 | parse_rtattr(etb, MDBA_MDB_EATTR_MAX, MDB_RTA(RTA_DATA(i)), | |
216 | RTA_PAYLOAD(i) - RTA_ALIGN(sizeof(*e))); | |
217 | print_mdb_entry(f, ifindex, e, n, etb); | |
218 | } | |
219 | } | |
220 | ||
221 | int print_mdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) | |
222 | { | |
223 | FILE *fp = arg; | |
224 | struct br_port_msg *r = NLMSG_DATA(n); | |
225 | int len = n->nlmsg_len; | |
226 | struct rtattr *tb[MDBA_MAX+1], *i; | |
227 | ||
228 | if (n->nlmsg_type != RTM_GETMDB && n->nlmsg_type != RTM_NEWMDB && n->nlmsg_type != RTM_DELMDB) { | |
229 | fprintf(stderr, "Not RTM_GETMDB, RTM_NEWMDB or RTM_DELMDB: %08x %08x %08x\n", | |
230 | n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | len -= NLMSG_LENGTH(sizeof(*r)); | |
236 | if (len < 0) { | |
237 | fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); | |
238 | return -1; | |
239 | } | |
240 | ||
241 | if (filter_index && filter_index != r->ifindex) | |
242 | return 0; | |
243 | ||
244 | parse_rtattr(tb, MDBA_MAX, MDBA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r))); | |
245 | ||
246 | if (tb[MDBA_MDB] && print_mdb_entries) { | |
247 | int rem = RTA_PAYLOAD(tb[MDBA_MDB]); | |
248 | ||
249 | for (i = RTA_DATA(tb[MDBA_MDB]); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) | |
250 | br_print_mdb_entry(fp, r->ifindex, i, n); | |
251 | } | |
252 | ||
253 | if (tb[MDBA_ROUTER] && print_mdb_router) { | |
254 | if (n->nlmsg_type == RTM_GETMDB) { | |
255 | if (show_details) | |
256 | br_print_router_ports(fp, tb[MDBA_ROUTER], | |
257 | r->ifindex); | |
258 | } else { | |
259 | uint32_t *port_ifindex; | |
260 | ||
261 | i = RTA_DATA(tb[MDBA_ROUTER]); | |
262 | port_ifindex = RTA_DATA(i); | |
263 | if (n->nlmsg_type == RTM_DELMDB) { | |
264 | if (jw_global) | |
265 | jsonw_string_field(jw_global, | |
266 | "opCode", | |
267 | "deleted"); | |
268 | else | |
269 | fprintf(fp, "Deleted "); | |
270 | } | |
271 | if (jw_global) { | |
272 | jsonw_name(jw_global, | |
273 | ll_index_to_name(r->ifindex)); | |
274 | jsonw_start_array(jw_global); | |
275 | jsonw_start_object(jw_global); | |
276 | jsonw_string_field(jw_global, "port", | |
277 | ll_index_to_name(*port_ifindex)); | |
278 | jsonw_end_object(jw_global); | |
279 | jsonw_end_array(jw_global); | |
280 | } else { | |
281 | fprintf(fp, "router port dev %s master %s\n", | |
282 | ll_index_to_name(*port_ifindex), | |
283 | ll_index_to_name(r->ifindex)); | |
284 | } | |
285 | } | |
286 | } | |
287 | ||
288 | if (!jw_global) | |
289 | fflush(fp); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static int mdb_show(int argc, char **argv) | |
295 | { | |
296 | char *filter_dev = NULL; | |
297 | ||
298 | while (argc > 0) { | |
299 | if (strcmp(*argv, "dev") == 0) { | |
300 | NEXT_ARG(); | |
301 | if (filter_dev) | |
302 | duparg("dev", *argv); | |
303 | filter_dev = *argv; | |
304 | } else if (strcmp(*argv, "vid") == 0) { | |
305 | NEXT_ARG(); | |
306 | if (filter_vlan) | |
307 | duparg("vid", *argv); | |
308 | filter_vlan = atoi(*argv); | |
309 | } | |
310 | argc--; argv++; | |
311 | } | |
312 | ||
313 | if (filter_dev) { | |
314 | filter_index = if_nametoindex(filter_dev); | |
315 | if (filter_index == 0) { | |
316 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
317 | filter_dev); | |
318 | return -1; | |
319 | } | |
320 | } | |
321 | ||
322 | /* get mdb entries*/ | |
323 | if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETMDB) < 0) { | |
324 | perror("Cannot send dump request"); | |
325 | return -1; | |
326 | } | |
327 | ||
328 | if (!json_output) { | |
329 | /* Normal output */ | |
330 | if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) { | |
331 | fprintf(stderr, "Dump terminated\n"); | |
332 | return -1; | |
333 | } | |
334 | return 0; | |
335 | } | |
336 | /* Json output */ | |
337 | jw_global = jsonw_new(stdout); | |
338 | jsonw_pretty(jw_global, 1); | |
339 | jsonw_start_object(jw_global); | |
340 | jsonw_name(jw_global, "mdb"); | |
341 | jsonw_start_array(jw_global); | |
342 | ||
343 | /* print mdb entries */ | |
344 | print_mdb_entries = true; | |
345 | print_mdb_router = false; | |
346 | if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) { | |
347 | fprintf(stderr, "Dump terminated\n"); | |
348 | return -1; | |
349 | } | |
350 | jsonw_end_array(jw_global); | |
351 | ||
352 | /* get router ports */ | |
353 | if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETMDB) < 0) { | |
354 | perror("Cannot send dump request"); | |
355 | return -1; | |
356 | } | |
357 | jsonw_name(jw_global, "router"); | |
358 | jsonw_start_object(jw_global); | |
359 | ||
360 | /* print router ports */ | |
361 | print_mdb_entries = false; | |
362 | print_mdb_router = true; | |
363 | if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) { | |
364 | fprintf(stderr, "Dump terminated\n"); | |
365 | return -1; | |
366 | } | |
367 | jsonw_end_object(jw_global); | |
368 | jsonw_end_object(jw_global); | |
369 | jsonw_destroy(&jw_global); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static int mdb_modify(int cmd, int flags, int argc, char **argv) | |
375 | { | |
376 | struct { | |
377 | struct nlmsghdr n; | |
378 | struct br_port_msg bpm; | |
379 | char buf[1024]; | |
380 | } req = { | |
381 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg)), | |
382 | .n.nlmsg_flags = NLM_F_REQUEST | flags, | |
383 | .n.nlmsg_type = cmd, | |
384 | .bpm.family = PF_BRIDGE, | |
385 | }; | |
386 | struct br_mdb_entry entry = {}; | |
387 | char *d = NULL, *p = NULL, *grp = NULL; | |
388 | short vid = 0; | |
389 | ||
390 | while (argc > 0) { | |
391 | if (strcmp(*argv, "dev") == 0) { | |
392 | NEXT_ARG(); | |
393 | d = *argv; | |
394 | } else if (strcmp(*argv, "grp") == 0) { | |
395 | NEXT_ARG(); | |
396 | grp = *argv; | |
397 | } else if (strcmp(*argv, "port") == 0) { | |
398 | NEXT_ARG(); | |
399 | p = *argv; | |
400 | } else if (strcmp(*argv, "permanent") == 0) { | |
401 | if (cmd == RTM_NEWMDB) | |
402 | entry.state |= MDB_PERMANENT; | |
403 | } else if (strcmp(*argv, "temp") == 0) { | |
404 | ;/* nothing */ | |
405 | } else if (strcmp(*argv, "vid") == 0) { | |
406 | NEXT_ARG(); | |
407 | vid = atoi(*argv); | |
408 | } else { | |
409 | if (matches(*argv, "help") == 0) | |
410 | usage(); | |
411 | } | |
412 | argc--; argv++; | |
413 | } | |
414 | ||
415 | if (d == NULL || grp == NULL || p == NULL) { | |
416 | fprintf(stderr, "Device, group address and port name are required arguments.\n"); | |
417 | return -1; | |
418 | } | |
419 | ||
420 | req.bpm.ifindex = ll_name_to_index(d); | |
421 | if (req.bpm.ifindex == 0) { | |
422 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
423 | return -1; | |
424 | } | |
425 | ||
426 | entry.ifindex = ll_name_to_index(p); | |
427 | if (entry.ifindex == 0) { | |
428 | fprintf(stderr, "Cannot find device \"%s\"\n", p); | |
429 | return -1; | |
430 | } | |
431 | ||
432 | if (!inet_pton(AF_INET, grp, &entry.addr.u.ip4)) { | |
433 | if (!inet_pton(AF_INET6, grp, &entry.addr.u.ip6)) { | |
434 | fprintf(stderr, "Invalid address \"%s\"\n", grp); | |
435 | return -1; | |
436 | } else | |
437 | entry.addr.proto = htons(ETH_P_IPV6); | |
438 | } else | |
439 | entry.addr.proto = htons(ETH_P_IP); | |
440 | ||
441 | entry.vid = vid; | |
442 | addattr_l(&req.n, sizeof(req), MDBA_SET_ENTRY, &entry, sizeof(entry)); | |
443 | ||
444 | if (rtnl_talk(&rth, &req.n, NULL) < 0) | |
445 | return -1; | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | int do_mdb(int argc, char **argv) | |
451 | { | |
452 | ll_init_map(&rth); | |
453 | ||
454 | if (argc > 0) { | |
455 | if (matches(*argv, "add") == 0) | |
456 | return mdb_modify(RTM_NEWMDB, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1); | |
457 | if (matches(*argv, "delete") == 0) | |
458 | return mdb_modify(RTM_DELMDB, 0, argc-1, argv+1); | |
459 | ||
460 | if (matches(*argv, "show") == 0 || | |
461 | matches(*argv, "lst") == 0 || | |
462 | matches(*argv, "list") == 0) | |
463 | return mdb_show(argc-1, argv+1); | |
464 | if (matches(*argv, "help") == 0) | |
465 | usage(); | |
466 | } else | |
467 | return mdb_show(0, NULL); | |
468 | ||
469 | fprintf(stderr, "Command \"%s\" is unknown, try \"bridge mdb help\".\n", *argv); | |
470 | exit(-1); | |
471 | } |