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Commit | Line | Data |
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2ef1be68 JB |
1 | #include <linux/nl80211.h> |
2 | #include <net/if.h> | |
3d1e8704 | 3 | #include <errno.h> |
2ef1be68 | 4 | |
3d1e8704 LCC |
5 | #include <netlink/genl/genl.h> |
6 | #include <netlink/genl/family.h> | |
7 | #include <netlink/genl/ctrl.h> | |
8 | #include <netlink/msg.h> | |
9 | #include <netlink/attr.h> | |
3d1e8704 LCC |
10 | |
11 | #include "iw.h" | |
12 | ||
13 | enum plink_state { | |
14 | LISTEN, | |
15 | OPN_SNT, | |
16 | OPN_RCVD, | |
17 | CNF_RCVD, | |
18 | ESTAB, | |
19 | HOLDING, | |
20 | BLOCKED | |
21 | }; | |
22 | ||
23 | enum plink_actions { | |
24 | PLINK_ACTION_UNDEFINED, | |
25 | PLINK_ACTION_OPEN, | |
26 | PLINK_ACTION_BLOCK, | |
27 | }; | |
28 | ||
29 | ||
30 | static int wait_handler(struct nl_msg *msg, void *arg) | |
31 | { | |
32 | int *finished = arg; | |
33 | ||
34 | *finished = 1; | |
35 | return NL_STOP; | |
36 | } | |
37 | ||
38 | static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, | |
39 | void *arg) | |
40 | { | |
41 | fprintf(stderr, "nl80211 error %d\n", err->error); | |
42 | exit(err->error); | |
43 | } | |
44 | ||
45 | static int print_mpath_handler(struct nl_msg *msg, void *arg) | |
46 | { | |
47 | struct nlattr *tb[NL80211_ATTR_MAX + 1]; | |
48 | struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); | |
49 | struct nlattr *pinfo[NL80211_MPATH_INFO_MAX + 1]; | |
50 | char dst[20], next_hop[20], dev[20]; | |
51 | static struct nla_policy mpath_policy[NL80211_MPATH_INFO_MAX + 1] = { | |
52 | [NL80211_MPATH_INFO_FRAME_QLEN] = { .type = NLA_U32 }, | |
53 | [NL80211_MPATH_INFO_DSN] = { .type = NLA_U32 }, | |
54 | [NL80211_MPATH_INFO_METRIC] = { .type = NLA_U32 }, | |
55 | [NL80211_MPATH_INFO_EXPTIME] = { .type = NLA_U32 }, | |
56 | [NL80211_MPATH_INFO_DISCOVERY_TIMEOUT] = { .type = NLA_U32 }, | |
57 | [NL80211_MPATH_INFO_DISCOVERY_RETRIES] = { .type = NLA_U8 }, | |
58 | [NL80211_MPATH_INFO_FLAGS] = { .type = NLA_U8 }, | |
59 | }; | |
60 | ||
61 | nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), | |
62 | genlmsg_attrlen(gnlh, 0), NULL); | |
63 | ||
64 | /* | |
65 | * TODO: validate the interface and mac address! | |
66 | * Otherwise, there's a race condition as soon as | |
67 | * the kernel starts sending mpath notifications. | |
68 | */ | |
69 | ||
70 | if (!tb[NL80211_ATTR_MPATH_INFO]) { | |
71 | fprintf(stderr, "mpath info missing!"); | |
72 | return NL_SKIP; | |
73 | } | |
74 | if (nla_parse_nested(pinfo, NL80211_MPATH_INFO_MAX, | |
75 | tb[NL80211_ATTR_MPATH_INFO], | |
76 | mpath_policy)) { | |
77 | fprintf(stderr, "failed to parse nested attributes!"); | |
78 | return NL_SKIP; | |
79 | } | |
80 | ||
81 | mac_addr_n2a(dst, nla_data(tb[NL80211_ATTR_MAC])); | |
82 | mac_addr_n2a(next_hop, nla_data(tb[NL80211_ATTR_MPATH_NEXT_HOP])); | |
83 | if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev); | |
84 | printf("%s %s %s", dst, next_hop, dev); | |
85 | if (pinfo[NL80211_MPATH_INFO_DSN]) | |
86 | printf("\t%u", | |
87 | nla_get_u32(pinfo[NL80211_MPATH_INFO_DSN])); | |
88 | if (pinfo[NL80211_MPATH_INFO_METRIC]) | |
89 | printf("\t%u", | |
90 | nla_get_u32(pinfo[NL80211_MPATH_INFO_METRIC])); | |
91 | if (pinfo[NL80211_MPATH_INFO_FRAME_QLEN]) | |
92 | printf("\t%u", | |
93 | nla_get_u32(pinfo[NL80211_MPATH_INFO_FRAME_QLEN])); | |
94 | if (pinfo[NL80211_MPATH_INFO_EXPTIME]) | |
95 | printf("\t%u", | |
96 | nla_get_u32(pinfo[NL80211_MPATH_INFO_EXPTIME])); | |
97 | if (pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT]) | |
98 | printf("\t%u", | |
99 | nla_get_u32(pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT])); | |
100 | if (pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES]) | |
101 | printf("\t%u", | |
102 | nla_get_u8(pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES])); | |
103 | if (pinfo[NL80211_MPATH_INFO_FLAGS]) | |
104 | printf("\t0x%x", | |
105 | nla_get_u8(pinfo[NL80211_MPATH_INFO_FLAGS])); | |
106 | ||
107 | printf("\n"); | |
108 | return NL_SKIP; | |
109 | } | |
110 | ||
111 | static int handle_mpath_get(struct nl80211_state *state, | |
112 | char *dev, int argc, char **argv) | |
113 | { | |
114 | struct nl_msg *msg; | |
115 | struct nl_cb *cb = NULL; | |
116 | int ret = -1; | |
117 | int err; | |
118 | int finished = 0; | |
119 | unsigned char dst[ETH_ALEN]; | |
120 | ||
121 | if (argc < 1) { | |
122 | fprintf(stderr, "not enough arguments\n"); | |
123 | return -1; | |
124 | } | |
125 | ||
126 | if (mac_addr_a2n(dst, argv[0])) { | |
127 | fprintf(stderr, "invalid mac address\n"); | |
128 | return -1; | |
129 | } | |
130 | argc--; | |
131 | argv++; | |
132 | ||
133 | if (argc) { | |
134 | fprintf(stderr, "too many arguments\n"); | |
135 | return -1; | |
136 | } | |
137 | ||
138 | msg = nlmsg_alloc(); | |
139 | if (!msg) | |
140 | goto out; | |
141 | ||
142 | genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0, | |
143 | 0, NL80211_CMD_GET_MPATH, 0); | |
144 | ||
145 | NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst); | |
146 | NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(dev)); | |
147 | ||
148 | cb = nl_cb_alloc(NL_CB_CUSTOM); | |
149 | if (!cb) | |
150 | goto out; | |
151 | ||
152 | if (nl_send_auto_complete(state->nl_handle, msg) < 0) | |
153 | goto out; | |
154 | ||
155 | nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL); | |
156 | nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished); | |
157 | nl_cb_err(cb, NL_CB_CUSTOM, error_handler, NULL); | |
158 | ||
159 | err = nl_recvmsgs(state->nl_handle, cb); | |
160 | ||
161 | if (!finished) | |
162 | err = nl_wait_for_ack(state->nl_handle); | |
163 | ||
164 | if (err < 0) | |
165 | goto out; | |
166 | ||
167 | ret = 0; | |
168 | ||
169 | out: | |
170 | nl_cb_put(cb); | |
171 | nla_put_failure: | |
172 | nlmsg_free(msg); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | static int handle_mpath_set(struct nl80211_state *state, int new, | |
177 | char *dev, int argc, char **argv) | |
178 | { | |
179 | struct nl_msg *msg; | |
180 | struct nl_cb *cb = NULL; | |
181 | int ret = -1; | |
182 | int err, command; | |
183 | int finished = 0; | |
184 | unsigned char dst[ETH_ALEN]; | |
185 | unsigned char next_hop[ETH_ALEN]; | |
186 | ||
187 | if (argc < 3) { | |
188 | fprintf(stderr, "not enough arguments\n"); | |
189 | return -1; | |
190 | } | |
191 | ||
192 | if (mac_addr_a2n(dst, argv[0])) { | |
193 | fprintf(stderr, "invalid destination mac address\n"); | |
194 | return -1; | |
195 | } | |
196 | argc--; | |
197 | argv++; | |
198 | ||
199 | if (strcmp("next_hop", argv[0]) != 0) { | |
200 | fprintf(stderr, "parameter not supported\n"); | |
201 | return -1; | |
202 | } | |
203 | argc--; | |
204 | argv++; | |
205 | ||
206 | if (mac_addr_a2n(next_hop, argv[0])) { | |
207 | fprintf(stderr, "invalid next hop mac address\n"); | |
208 | return -1; | |
209 | } | |
210 | argc--; | |
211 | argv++; | |
212 | ||
213 | if (argc) { | |
214 | fprintf(stderr, "too many arguments\n"); | |
215 | return -1; | |
216 | } | |
217 | ||
218 | msg = nlmsg_alloc(); | |
219 | if (!msg) | |
220 | goto out; | |
221 | ||
222 | command = new ? NL80211_CMD_NEW_MPATH : NL80211_CMD_SET_MPATH; | |
223 | genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0, 0, | |
224 | command, 0); | |
225 | ||
226 | NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst); | |
227 | NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(dev)); | |
228 | NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop); | |
229 | ||
230 | cb = nl_cb_alloc(NL_CB_CUSTOM); | |
231 | if (!cb) | |
232 | goto out; | |
233 | ||
234 | if (nl_send_auto_complete(state->nl_handle, msg) < 0) | |
235 | goto out; | |
236 | ||
237 | nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL); | |
238 | nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished); | |
239 | nl_cb_err(cb, NL_CB_CUSTOM, error_handler, NULL); | |
240 | ||
241 | err = nl_recvmsgs(state->nl_handle, cb); | |
242 | ||
243 | if (!finished) | |
244 | err = nl_wait_for_ack(state->nl_handle); | |
245 | ||
246 | if (err < 0) | |
247 | goto out; | |
248 | ||
249 | ret = 0; | |
250 | ||
251 | out: | |
252 | nl_cb_put(cb); | |
253 | nla_put_failure: | |
254 | nlmsg_free(msg); | |
255 | return ret; | |
256 | } | |
257 | ||
258 | static int handle_mpath_del(struct nl80211_state *state, | |
259 | char *dev, int argc, char **argv) | |
260 | { | |
261 | struct nl_msg *msg; | |
262 | struct nl_cb *cb = NULL; | |
263 | int ret = -1; | |
264 | int err; | |
265 | int finished = 0; | |
266 | unsigned char dst[ETH_ALEN]; | |
267 | ||
268 | if (argc > 1) { | |
269 | fprintf(stderr, "too many arguments\n"); | |
270 | return -1; | |
271 | } | |
272 | ||
273 | if (argc && mac_addr_a2n(dst, argv[0])) { | |
274 | fprintf(stderr, "invalid mac address\n"); | |
275 | return -1; | |
276 | } | |
277 | ||
278 | msg = nlmsg_alloc(); | |
279 | if (!msg) | |
280 | goto out; | |
281 | ||
282 | genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0, 0, | |
283 | NL80211_CMD_DEL_MPATH, 0); | |
284 | ||
285 | NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(dev)); | |
286 | if (argc) | |
287 | NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst); | |
288 | ||
289 | cb = nl_cb_alloc(NL_CB_CUSTOM); | |
290 | if (!cb) | |
291 | goto out; | |
292 | ||
293 | if (nl_send_auto_complete(state->nl_handle, msg) < 0) | |
294 | goto out; | |
295 | ||
296 | nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL); | |
297 | nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished); | |
298 | nl_cb_err(cb, NL_CB_CUSTOM, error_handler, NULL); | |
299 | ||
300 | err = nl_recvmsgs(state->nl_handle, cb); | |
301 | ||
302 | if (!finished) | |
303 | err = nl_wait_for_ack(state->nl_handle); | |
304 | ||
305 | if (err < 0) | |
306 | goto out; | |
307 | ||
308 | ret = 0; | |
309 | ||
310 | out: | |
311 | nl_cb_put(cb); | |
312 | nla_put_failure: | |
313 | nlmsg_free(msg); | |
314 | return ret; | |
315 | } | |
316 | ||
317 | static int handle_mpath_dump(struct nl80211_state *state, | |
318 | char *dev, int argc, char **argv) | |
319 | { | |
320 | struct nl_msg *msg; | |
321 | struct nl_cb *cb = NULL; | |
322 | int ret = -1; | |
323 | int err; | |
324 | int finished = 0; | |
325 | ||
326 | if (argc) { | |
327 | fprintf(stderr, "too many arguments\n"); | |
328 | return -1; | |
329 | } | |
330 | ||
331 | msg = nlmsg_alloc(); | |
332 | if (!msg) | |
333 | goto out; | |
334 | ||
335 | genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0, | |
336 | NLM_F_DUMP, NL80211_CMD_GET_MPATH, 0); | |
337 | ||
338 | NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(dev)); | |
339 | ||
340 | cb = nl_cb_alloc(NL_CB_CUSTOM); | |
341 | if (!cb) | |
342 | goto out; | |
343 | ||
344 | if (nl_send_auto_complete(state->nl_handle, msg) < 0) | |
345 | goto out; | |
346 | ||
347 | nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL); | |
348 | nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished); | |
349 | ||
350 | err = nl_recvmsgs(state->nl_handle, cb); | |
351 | ||
352 | if (err < 0) | |
353 | goto out; | |
354 | ||
355 | ret = 0; | |
356 | ||
357 | out: | |
358 | nl_cb_put(cb); | |
359 | nla_put_failure: | |
360 | nlmsg_free(msg); | |
361 | return ret; | |
362 | } | |
363 | ||
364 | int handle_mpath(struct nl80211_state *state, | |
365 | char *dev, int argc, char **argv) | |
366 | { | |
367 | char *cmd = argv[0]; | |
368 | ||
369 | if (argc < 1) { | |
370 | fprintf(stderr, "you must specify an mpath command\n"); | |
371 | return -1; | |
372 | } | |
373 | ||
374 | argc--; | |
375 | argv++; | |
376 | ||
377 | if (strcmp(cmd, "new") == 0) | |
378 | return handle_mpath_set(state, 1, dev, argc, argv); | |
379 | if (strcmp(cmd, "del") == 0) | |
380 | return handle_mpath_del(state, dev, argc, argv); | |
381 | if (strcmp(cmd, "get") == 0) | |
382 | return handle_mpath_get(state, dev, argc, argv); | |
383 | if (strcmp(cmd, "set") == 0) | |
384 | return handle_mpath_set(state, 0, dev, argc, argv); | |
385 | if (strcmp(cmd, "dump") == 0) | |
386 | return handle_mpath_dump(state, dev, argc, argv); | |
387 | ||
388 | printf("invalid interface command %s\n", cmd); | |
389 | return -1; | |
390 | } |