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Commit | Line | Data |
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d04bc300 SH |
1 | /* |
2 | * Get/set/delete fdb table with netlink | |
3 | * | |
0849e60a SH |
4 | * TODO: merge/replace this with ip neighbour |
5 | * | |
d04bc300 SH |
6 | * Authors: Stephen Hemminger <shemminger@vyatta.com> |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <unistd.h> | |
5f409678 | 12 | #include <netdb.h> |
d04bc300 SH |
13 | #include <time.h> |
14 | #include <fcntl.h> | |
15 | #include <sys/socket.h> | |
16 | #include <sys/time.h> | |
17 | #include <net/if.h> | |
18 | #include <netinet/in.h> | |
19 | #include <linux/if_bridge.h> | |
20 | #include <linux/if_ether.h> | |
21 | #include <linux/neighbour.h> | |
22 | #include <string.h> | |
dd9cc0ee | 23 | #include <limits.h> |
d04bc300 SH |
24 | |
25 | #include "libnetlink.h" | |
26 | #include "br_common.h" | |
0849e60a | 27 | #include "rt_names.h" |
d04bc300 SH |
28 | #include "utils.h" |
29 | ||
9dca899b | 30 | static unsigned int filter_index; |
d04bc300 SH |
31 | |
32 | static void usage(void) | |
33 | { | |
5464049b | 34 | fprintf(stderr, "Usage: bridge fdb { add | append | del | replace } ADDR dev DEV {self|master} [ temp ]\n" |
7578ae88 | 35 | " [router] [ dst IPADDR] [ vlan VID ]\n" |
5f409678 | 36 | " [ port PORT] [ vni VNI ] [via DEV]\n"); |
aeb14eb0 | 37 | fprintf(stderr, " bridge fdb {show} [ br BRDEV ] [ brport DEV ]\n"); |
d04bc300 SH |
38 | exit(-1); |
39 | } | |
40 | ||
41 | static const char *state_n2a(unsigned s) | |
42 | { | |
43 | static char buf[32]; | |
44 | ||
0849e60a SH |
45 | if (s & NUD_PERMANENT) |
46 | return "permanent"; | |
d04bc300 SH |
47 | |
48 | if (s & NUD_NOARP) | |
49 | return "static"; | |
50 | ||
51 | if (s & NUD_STALE) | |
52 | return "stale"; | |
0849e60a | 53 | |
d04bc300 SH |
54 | if (s & NUD_REACHABLE) |
55 | return ""; | |
56 | ||
57 | sprintf(buf, "state=%#x", s); | |
58 | return buf; | |
59 | } | |
60 | ||
d04bc300 SH |
61 | int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
62 | { | |
0849e60a | 63 | FILE *fp = arg; |
d04bc300 SH |
64 | struct ndmsg *r = NLMSG_DATA(n); |
65 | int len = n->nlmsg_len; | |
66 | struct rtattr * tb[NDA_MAX+1]; | |
0849e60a SH |
67 | |
68 | if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) { | |
69 | fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n", | |
70 | n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); | |
71 | ||
72 | return 0; | |
73 | } | |
d04bc300 SH |
74 | |
75 | len -= NLMSG_LENGTH(sizeof(*r)); | |
76 | if (len < 0) { | |
77 | fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); | |
78 | return -1; | |
79 | } | |
80 | ||
81 | if (r->ndm_family != AF_BRIDGE) | |
82 | return 0; | |
83 | ||
84 | if (filter_index && filter_index != r->ndm_ifindex) | |
85 | return 0; | |
86 | ||
87 | parse_rtattr(tb, NDA_MAX, NDA_RTA(r), | |
88 | n->nlmsg_len - NLMSG_LENGTH(sizeof(*r))); | |
89 | ||
90 | if (n->nlmsg_type == RTM_DELNEIGH) | |
0849e60a SH |
91 | fprintf(fp, "Deleted "); |
92 | ||
93 | if (tb[NDA_LLADDR]) { | |
94 | SPRINT_BUF(b1); | |
95 | fprintf(fp, "%s ", | |
96 | ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]), | |
97 | RTA_PAYLOAD(tb[NDA_LLADDR]), | |
98 | ll_index_to_type(r->ndm_ifindex), | |
99 | b1, sizeof(b1))); | |
d04bc300 | 100 | } |
38df7ac9 | 101 | |
0849e60a SH |
102 | if (!filter_index && r->ndm_ifindex) |
103 | fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex)); | |
104 | ||
105 | if (tb[NDA_DST]) { | |
106 | SPRINT_BUF(abuf); | |
9e763fa5 MR |
107 | int family = AF_INET; |
108 | ||
109 | if (RTA_PAYLOAD(tb[NDA_DST]) == sizeof(struct in6_addr)) | |
110 | family = AF_INET6; | |
111 | ||
0849e60a | 112 | fprintf(fp, "dst %s ", |
9e763fa5 | 113 | format_host(family, |
0849e60a SH |
114 | RTA_PAYLOAD(tb[NDA_DST]), |
115 | RTA_DATA(tb[NDA_DST]), | |
116 | abuf, sizeof(abuf))); | |
117 | } | |
38df7ac9 | 118 | |
fd08839c VY |
119 | if (tb[NDA_VLAN]) { |
120 | __u16 vid = rta_getattr_u16(tb[NDA_VLAN]); | |
121 | fprintf(fp, "vlan %hu ", vid); | |
122 | } | |
123 | ||
5f409678 DS |
124 | if (tb[NDA_PORT]) |
125 | fprintf(fp, "port %d ", ntohs(rta_getattr_u16(tb[NDA_PORT]))); | |
126 | if (tb[NDA_VNI]) | |
127 | fprintf(fp, "vni %d ", rta_getattr_u32(tb[NDA_VNI])); | |
128 | if (tb[NDA_IFINDEX]) { | |
129 | unsigned int ifindex = rta_getattr_u32(tb[NDA_IFINDEX]); | |
130 | ||
131 | if (ifindex) { | |
132 | char ifname[IF_NAMESIZE]; | |
133 | ||
a4797670 ND |
134 | if (!tb[NDA_LINK_NETNSID] && |
135 | if_indextoname(ifindex, ifname)) | |
5f409678 DS |
136 | fprintf(fp, "via %s ", ifname); |
137 | else | |
138 | fprintf(fp, "via ifindex %u ", ifindex); | |
139 | } | |
140 | } | |
a4797670 ND |
141 | if (tb[NDA_LINK_NETNSID]) |
142 | fprintf(fp, "link-netnsid %d ", | |
143 | rta_getattr_u32(tb[NDA_LINK_NETNSID])); | |
5f409678 | 144 | |
d04bc300 SH |
145 | if (show_stats && tb[NDA_CACHEINFO]) { |
146 | struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]); | |
0849e60a | 147 | int hz = get_user_hz(); |
d04bc300 | 148 | |
85c1807f | 149 | fprintf(fp, "used %d/%d ", ci->ndm_used/hz, |
0849e60a | 150 | ci->ndm_updated/hz); |
d04bc300 | 151 | } |
0849e60a SH |
152 | if (r->ndm_flags & NTF_SELF) |
153 | fprintf(fp, "self "); | |
cc273a51 RP |
154 | if (tb[NDA_MASTER]) |
155 | fprintf(fp, "master %s ", | |
156 | ll_index_to_name(rta_getattr_u32(tb[NDA_MASTER]))); | |
157 | else if (r->ndm_flags & NTF_MASTER) | |
0849e60a | 158 | fprintf(fp, "master "); |
5b8a1d4a DS |
159 | if (r->ndm_flags & NTF_ROUTER) |
160 | fprintf(fp, "router "); | |
28467b7f | 161 | if (r->ndm_flags & NTF_EXT_LEARNED) |
aa05b988 | 162 | fprintf(fp, "offload "); |
d04bc300 | 163 | |
0849e60a | 164 | fprintf(fp, "%s\n", state_n2a(r->ndm_state)); |
d04bc300 SH |
165 | return 0; |
166 | } | |
167 | ||
168 | static int fdb_show(int argc, char **argv) | |
169 | { | |
aeb14eb0 JHS |
170 | struct { |
171 | struct nlmsghdr n; | |
172 | struct ifinfomsg ifm; | |
173 | char buf[256]; | |
174 | } req; | |
175 | ||
d04bc300 | 176 | char *filter_dev = NULL; |
aeb14eb0 JHS |
177 | char *br = NULL; |
178 | int msg_size = sizeof(struct ifinfomsg); | |
179 | ||
180 | memset(&req, 0, sizeof(req)); | |
181 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
182 | req.ifm.ifi_family = PF_BRIDGE; | |
0849e60a | 183 | |
d04bc300 | 184 | while (argc > 0) { |
aeb14eb0 | 185 | if ((strcmp(*argv, "brport") == 0) || strcmp(*argv, "dev") == 0) { |
d04bc300 | 186 | NEXT_ARG(); |
d04bc300 | 187 | filter_dev = *argv; |
aeb14eb0 JHS |
188 | } else if (strcmp(*argv, "br") == 0) { |
189 | NEXT_ARG(); | |
190 | br = *argv; | |
191 | } else { | |
192 | if (matches(*argv, "help") == 0) | |
193 | usage(); | |
d04bc300 SH |
194 | } |
195 | argc--; argv++; | |
196 | } | |
197 | ||
aeb14eb0 JHS |
198 | if (br) { |
199 | int br_ifindex = ll_name_to_index(br); | |
200 | if (br_ifindex == 0) { | |
201 | fprintf(stderr, "Cannot find bridge device \"%s\"\n", br); | |
202 | return -1; | |
203 | } | |
204 | addattr32(&req.n, sizeof(req), IFLA_MASTER, br_ifindex); | |
205 | msg_size += RTA_LENGTH(4); | |
206 | } | |
207 | ||
208 | /*we'll keep around filter_dev for older kernels */ | |
d04bc300 | 209 | if (filter_dev) { |
0849e60a SH |
210 | filter_index = if_nametoindex(filter_dev); |
211 | if (filter_index == 0) { | |
212 | fprintf(stderr, "Cannot find device \"%s\"\n", | |
213 | filter_dev); | |
d04bc300 SH |
214 | return -1; |
215 | } | |
aeb14eb0 | 216 | req.ifm.ifi_index = filter_index; |
d04bc300 SH |
217 | } |
218 | ||
aeb14eb0 | 219 | if (rtnl_dump_request(&rth, RTM_GETNEIGH, &req.ifm, msg_size) < 0) { |
d04bc300 SH |
220 | perror("Cannot send dump request"); |
221 | exit(1); | |
222 | } | |
d04bc300 | 223 | |
0849e60a | 224 | if (rtnl_dump_filter(&rth, print_fdb, stdout) < 0) { |
d04bc300 SH |
225 | fprintf(stderr, "Dump terminated\n"); |
226 | exit(1); | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | static int fdb_modify(int cmd, int flags, int argc, char **argv) | |
233 | { | |
234 | struct { | |
235 | struct nlmsghdr n; | |
236 | struct ndmsg ndm; | |
237 | char buf[256]; | |
238 | } req; | |
239 | char *addr = NULL; | |
240 | char *d = NULL; | |
241 | char abuf[ETH_ALEN]; | |
0849e60a SH |
242 | int dst_ok = 0; |
243 | inet_prefix dst; | |
5f409678 DS |
244 | unsigned long port = 0; |
245 | unsigned long vni = ~0; | |
246 | unsigned int via = 0; | |
247 | char *endptr; | |
fd08839c | 248 | short vid = -1; |
d04bc300 SH |
249 | |
250 | memset(&req, 0, sizeof(req)); | |
251 | ||
252 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
253 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; | |
254 | req.n.nlmsg_type = cmd; | |
255 | req.ndm.ndm_family = PF_BRIDGE; | |
256 | req.ndm.ndm_state = NUD_NOARP; | |
257 | ||
258 | while (argc > 0) { | |
259 | if (strcmp(*argv, "dev") == 0) { | |
260 | NEXT_ARG(); | |
261 | d = *argv; | |
0849e60a SH |
262 | } else if (strcmp(*argv, "dst") == 0) { |
263 | NEXT_ARG(); | |
264 | if (dst_ok) | |
265 | duparg2("dst", *argv); | |
266 | get_addr(&dst, *argv, preferred_family); | |
267 | dst_ok = 1; | |
5f409678 DS |
268 | } else if (strcmp(*argv, "port") == 0) { |
269 | ||
270 | NEXT_ARG(); | |
271 | port = strtoul(*argv, &endptr, 0); | |
272 | if (endptr && *endptr) { | |
273 | struct servent *pse; | |
274 | ||
275 | pse = getservbyname(*argv, "udp"); | |
276 | if (!pse) | |
277 | invarg("invalid port\n", *argv); | |
278 | port = ntohs(pse->s_port); | |
279 | } else if (port > 0xffff) | |
280 | invarg("invalid port\n", *argv); | |
281 | } else if (strcmp(*argv, "vni") == 0) { | |
282 | NEXT_ARG(); | |
283 | vni = strtoul(*argv, &endptr, 0); | |
284 | if ((endptr && *endptr) || | |
285 | (vni >> 24) || vni == ULONG_MAX) | |
286 | invarg("invalid VNI\n", *argv); | |
287 | } else if (strcmp(*argv, "via") == 0) { | |
288 | NEXT_ARG(); | |
289 | via = if_nametoindex(*argv); | |
290 | if (via == 0) | |
291 | invarg("invalid device\n", *argv); | |
dc6a6a25 JF |
292 | } else if (strcmp(*argv, "self") == 0) { |
293 | req.ndm.ndm_flags |= NTF_SELF; | |
0849e60a | 294 | } else if (matches(*argv, "master") == 0) { |
dc6a6a25 | 295 | req.ndm.ndm_flags |= NTF_MASTER; |
5b8a1d4a DS |
296 | } else if (matches(*argv, "router") == 0) { |
297 | req.ndm.ndm_flags |= NTF_ROUTER; | |
38df7ac9 | 298 | } else if (matches(*argv, "local") == 0|| |
0849e60a SH |
299 | matches(*argv, "permanent") == 0) { |
300 | req.ndm.ndm_state |= NUD_PERMANENT; | |
301 | } else if (matches(*argv, "temp") == 0) { | |
302 | req.ndm.ndm_state |= NUD_REACHABLE; | |
fd08839c VY |
303 | } else if (matches(*argv, "vlan") == 0) { |
304 | if (vid >= 0) | |
305 | duparg2("vlan", *argv); | |
306 | NEXT_ARG(); | |
307 | vid = atoi(*argv); | |
d04bc300 SH |
308 | } else { |
309 | if (strcmp(*argv, "to") == 0) { | |
310 | NEXT_ARG(); | |
311 | } | |
0849e60a SH |
312 | if (matches(*argv, "help") == 0) |
313 | usage(); | |
d04bc300 SH |
314 | if (addr) |
315 | duparg2("to", *argv); | |
316 | addr = *argv; | |
317 | } | |
318 | argc--; argv++; | |
319 | } | |
320 | ||
321 | if (d == NULL || addr == NULL) { | |
322 | fprintf(stderr, "Device and address are required arguments.\n"); | |
42ecedd4 | 323 | return -1; |
d04bc300 SH |
324 | } |
325 | ||
0849e60a SH |
326 | /* Assume self */ |
327 | if (!(req.ndm.ndm_flags&(NTF_SELF|NTF_MASTER))) | |
328 | req.ndm.ndm_flags |= NTF_SELF; | |
329 | ||
330 | /* Assume permanent */ | |
331 | if (!(req.ndm.ndm_state&(NUD_PERMANENT|NUD_REACHABLE))) | |
332 | req.ndm.ndm_state |= NUD_PERMANENT; | |
333 | ||
334 | if (sscanf(addr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", | |
d04bc300 SH |
335 | abuf, abuf+1, abuf+2, |
336 | abuf+3, abuf+4, abuf+5) != 6) { | |
337 | fprintf(stderr, "Invalid mac address %s\n", addr); | |
42ecedd4 | 338 | return -1; |
d04bc300 SH |
339 | } |
340 | ||
341 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, abuf, ETH_ALEN); | |
0849e60a SH |
342 | if (dst_ok) |
343 | addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen); | |
d04bc300 | 344 | |
fd08839c | 345 | if (vid >= 0) |
8ae66094 | 346 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); |
fd08839c | 347 | |
5f409678 DS |
348 | if (port) { |
349 | unsigned short dport; | |
350 | ||
351 | dport = htons((unsigned short)port); | |
352 | addattr16(&req.n, sizeof(req), NDA_PORT, dport); | |
353 | } | |
354 | if (vni != ~0) | |
355 | addattr32(&req.n, sizeof(req), NDA_VNI, vni); | |
356 | if (via) | |
357 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, via); | |
358 | ||
d04bc300 SH |
359 | req.ndm.ndm_ifindex = ll_name_to_index(d); |
360 | if (req.ndm.ndm_ifindex == 0) { | |
361 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
362 | return -1; | |
363 | } | |
364 | ||
c079e121 | 365 | if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
42ecedd4 | 366 | return -1; |
d04bc300 SH |
367 | |
368 | return 0; | |
369 | } | |
370 | ||
371 | int do_fdb(int argc, char **argv) | |
372 | { | |
373 | ll_init_map(&rth); | |
374 | ||
375 | if (argc > 0) { | |
376 | if (matches(*argv, "add") == 0) | |
377 | return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1); | |
5f409678 DS |
378 | if (matches(*argv, "append") == 0) |
379 | return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_APPEND, argc-1, argv+1); | |
5464049b TR |
380 | if (matches(*argv, "replace") == 0) |
381 | return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); | |
d04bc300 SH |
382 | if (matches(*argv, "delete") == 0) |
383 | return fdb_modify(RTM_DELNEIGH, 0, argc-1, argv+1); | |
384 | if (matches(*argv, "show") == 0 || | |
385 | matches(*argv, "lst") == 0 || | |
386 | matches(*argv, "list") == 0) | |
387 | return fdb_show(argc-1, argv+1); | |
388 | if (matches(*argv, "help") == 0) | |
389 | usage(); | |
390 | } else | |
391 | return fdb_show(0, NULL); | |
392 | ||
083b46bb | 393 | fprintf(stderr, "Command \"%s\" is unknown, try \"bridge fdb help\".\n", *argv); |
d04bc300 SH |
394 | exit(-1); |
395 | } |