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1 | #include <net/if.h> | |
2 | #include <errno.h> | |
3 | #include <string.h> | |
4 | #include <stdbool.h> | |
5 | ||
6 | #include <netlink/genl/genl.h> | |
7 | #include <netlink/genl/family.h> | |
8 | #include <netlink/genl/ctrl.h> | |
9 | #include <netlink/msg.h> | |
10 | #include <netlink/attr.h> | |
11 | ||
12 | #include "nl80211.h" | |
13 | #include "iw.h" | |
14 | ||
15 | #define VALID_FLAGS "none: no special flags\n"\ | |
16 | "fcsfail: show frames with FCS errors\n"\ | |
17 | "control: show control frames\n"\ | |
18 | "otherbss: show frames from other BSSes\n"\ | |
19 | "cook: use cooked mode" | |
20 | ||
21 | SECTION(interface); | |
22 | ||
23 | static char *mntr_flags[NL80211_MNTR_FLAG_MAX + 1] = { | |
24 | "none", | |
25 | "fcsfail", | |
26 | "plcpfail", | |
27 | "control", | |
28 | "otherbss", | |
29 | "cook", | |
30 | }; | |
31 | ||
32 | static int parse_mntr_flags(int *_argc, char ***_argv, | |
33 | struct nl_msg *msg) | |
34 | { | |
35 | struct nl_msg *flags; | |
36 | int err = -ENOBUFS; | |
37 | enum nl80211_mntr_flags flag; | |
38 | int argc = *_argc; | |
39 | char **argv = *_argv; | |
40 | ||
41 | flags = nlmsg_alloc(); | |
42 | if (!flags) | |
43 | return -ENOMEM; | |
44 | ||
45 | while (argc) { | |
46 | int ok = 0; | |
47 | for (flag = __NL80211_MNTR_FLAG_INVALID; | |
48 | flag <= NL80211_MNTR_FLAG_MAX; flag++) { | |
49 | if (strcmp(*argv, mntr_flags[flag]) == 0) { | |
50 | ok = 1; | |
51 | /* | |
52 | * This shouldn't be adding "flag" if that is | |
53 | * zero, but due to a problem in the kernel's | |
54 | * nl80211 code (using NLA_NESTED policy) it | |
55 | * will reject an empty nested attribute but | |
56 | * not one that contains an invalid attribute | |
57 | */ | |
58 | NLA_PUT_FLAG(flags, flag); | |
59 | break; | |
60 | } | |
61 | } | |
62 | if (!ok) { | |
63 | err = -EINVAL; | |
64 | goto out; | |
65 | } | |
66 | argc--; | |
67 | argv++; | |
68 | } | |
69 | ||
70 | nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags); | |
71 | err = 0; | |
72 | nla_put_failure: | |
73 | out: | |
74 | nlmsg_free(flags); | |
75 | ||
76 | *_argc = argc; | |
77 | *_argv = argv; | |
78 | ||
79 | return err; | |
80 | } | |
81 | ||
82 | /* for help */ | |
83 | #define IFACE_TYPES "Valid interface types are: managed, ibss, monitor, mesh, wds." | |
84 | ||
85 | /* return 0 if ok, internal error otherwise */ | |
86 | static int get_if_type(int *argc, char ***argv, enum nl80211_iftype *type, | |
87 | bool need_type) | |
88 | { | |
89 | char *tpstr; | |
90 | ||
91 | if (*argc < 1 + !!need_type) | |
92 | return 1; | |
93 | ||
94 | if (need_type && strcmp((*argv)[0], "type")) | |
95 | return 1; | |
96 | ||
97 | tpstr = (*argv)[!!need_type]; | |
98 | *argc -= 1 + !!need_type; | |
99 | *argv += 1 + !!need_type; | |
100 | ||
101 | if (strcmp(tpstr, "adhoc") == 0 || | |
102 | strcmp(tpstr, "ibss") == 0) { | |
103 | *type = NL80211_IFTYPE_ADHOC; | |
104 | return 0; | |
105 | } else if (strcmp(tpstr, "monitor") == 0) { | |
106 | *type = NL80211_IFTYPE_MONITOR; | |
107 | return 0; | |
108 | } else if (strcmp(tpstr, "master") == 0 || | |
109 | strcmp(tpstr, "ap") == 0) { | |
110 | *type = NL80211_IFTYPE_UNSPECIFIED; | |
111 | fprintf(stderr, "You need to run a management daemon, e.g. hostapd,\n"); | |
112 | fprintf(stderr, "see http://wireless.kernel.org/en/users/Documentation/hostapd\n"); | |
113 | fprintf(stderr, "for more information on how to do that.\n"); | |
114 | return 2; | |
115 | } else if (strcmp(tpstr, "__ap") == 0) { | |
116 | *type = NL80211_IFTYPE_AP; | |
117 | return 0; | |
118 | } else if (strcmp(tpstr, "__ap_vlan") == 0) { | |
119 | *type = NL80211_IFTYPE_AP_VLAN; | |
120 | return 0; | |
121 | } else if (strcmp(tpstr, "wds") == 0) { | |
122 | *type = NL80211_IFTYPE_WDS; | |
123 | return 0; | |
124 | } else if (strcmp(tpstr, "managed") == 0 || | |
125 | strcmp(tpstr, "mgd") == 0 || | |
126 | strcmp(tpstr, "station") == 0) { | |
127 | *type = NL80211_IFTYPE_STATION; | |
128 | return 0; | |
129 | } else if (strcmp(tpstr, "mp") == 0 || | |
130 | strcmp(tpstr, "mesh") == 0) { | |
131 | *type = NL80211_IFTYPE_MESH_POINT; | |
132 | return 0; | |
133 | } else if (strcmp(tpstr, "__p2pcl") == 0) { | |
134 | *type = NL80211_IFTYPE_P2P_CLIENT; | |
135 | return 0; | |
136 | } else if (strcmp(tpstr, "__p2pdev") == 0) { | |
137 | *type = NL80211_IFTYPE_P2P_DEVICE; | |
138 | return 0; | |
139 | } else if (strcmp(tpstr, "__p2pgo") == 0) { | |
140 | *type = NL80211_IFTYPE_P2P_GO; | |
141 | return 0; | |
142 | } | |
143 | ||
144 | fprintf(stderr, "invalid interface type %s\n", tpstr); | |
145 | return 2; | |
146 | } | |
147 | ||
148 | static int parse_4addr_flag(const char *value, struct nl_msg *msg) | |
149 | { | |
150 | if (strcmp(value, "on") == 0) | |
151 | NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, 1); | |
152 | else if (strcmp(value, "off") == 0) | |
153 | NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, 0); | |
154 | else | |
155 | return 1; | |
156 | return 0; | |
157 | ||
158 | nla_put_failure: | |
159 | return 1; | |
160 | } | |
161 | ||
162 | static int handle_interface_add(struct nl80211_state *state, | |
163 | struct nl_cb *cb, | |
164 | struct nl_msg *msg, | |
165 | int argc, char **argv, | |
166 | enum id_input id) | |
167 | { | |
168 | char *name; | |
169 | char *mesh_id = NULL; | |
170 | enum nl80211_iftype type; | |
171 | int tpset; | |
172 | ||
173 | if (argc < 1) | |
174 | return 1; | |
175 | ||
176 | name = argv[0]; | |
177 | argc--; | |
178 | argv++; | |
179 | ||
180 | tpset = get_if_type(&argc, &argv, &type, true); | |
181 | if (tpset) | |
182 | return tpset; | |
183 | ||
184 | if (argc) { | |
185 | if (strcmp(argv[0], "mesh_id") == 0) { | |
186 | argc--; | |
187 | argv++; | |
188 | ||
189 | if (!argc) | |
190 | return 1; | |
191 | mesh_id = argv[0]; | |
192 | argc--; | |
193 | argv++; | |
194 | } else if (strcmp(argv[0], "4addr") == 0) { | |
195 | argc--; | |
196 | argv++; | |
197 | if (parse_4addr_flag(argv[0], msg)) { | |
198 | fprintf(stderr, "4addr error\n"); | |
199 | return 2; | |
200 | } | |
201 | argc--; | |
202 | argv++; | |
203 | } else if (strcmp(argv[0], "flags") == 0) { | |
204 | argc--; | |
205 | argv++; | |
206 | if (parse_mntr_flags(&argc, &argv, msg)) { | |
207 | fprintf(stderr, "flags error\n"); | |
208 | return 2; | |
209 | } | |
210 | } else { | |
211 | return 1; | |
212 | } | |
213 | } | |
214 | ||
215 | if (argc) | |
216 | return 1; | |
217 | ||
218 | NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, name); | |
219 | NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type); | |
220 | if (mesh_id) | |
221 | NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id); | |
222 | ||
223 | return 0; | |
224 | nla_put_failure: | |
225 | return -ENOBUFS; | |
226 | } | |
227 | COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>] [4addr on|off] [flags <flag>*]", | |
228 | NL80211_CMD_NEW_INTERFACE, 0, CIB_PHY, handle_interface_add, | |
229 | "Add a new virtual interface with the given configuration.\n" | |
230 | IFACE_TYPES "\n\n" | |
231 | "The flags are only used for monitor interfaces, valid flags are:\n" | |
232 | VALID_FLAGS "\n\n" | |
233 | "The mesh_id is used only for mesh mode."); | |
234 | COMMAND(interface, add, "<name> type <type> [mesh_id <meshid>] [4addr on|off] [flags <flag>*]", | |
235 | NL80211_CMD_NEW_INTERFACE, 0, CIB_NETDEV, handle_interface_add, NULL); | |
236 | ||
237 | static int handle_interface_del(struct nl80211_state *state, | |
238 | struct nl_cb *cb, | |
239 | struct nl_msg *msg, | |
240 | int argc, char **argv, | |
241 | enum id_input id) | |
242 | { | |
243 | return 0; | |
244 | } | |
245 | TOPLEVEL(del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del, | |
246 | "Remove this virtual interface"); | |
247 | HIDDEN(interface, del, NULL, NL80211_CMD_DEL_INTERFACE, 0, CIB_NETDEV, handle_interface_del); | |
248 | ||
249 | static char *channel_type_name(enum nl80211_channel_type channel_type) | |
250 | { | |
251 | switch (channel_type) { | |
252 | case NL80211_CHAN_NO_HT: | |
253 | return "NO HT"; | |
254 | case NL80211_CHAN_HT20: | |
255 | return "HT20"; | |
256 | case NL80211_CHAN_HT40MINUS: | |
257 | return "HT40-"; | |
258 | case NL80211_CHAN_HT40PLUS: | |
259 | return "HT40+"; | |
260 | default: | |
261 | return "unknown"; | |
262 | } | |
263 | } | |
264 | ||
265 | static int print_iface_handler(struct nl_msg *msg, void *arg) | |
266 | { | |
267 | struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); | |
268 | struct nlattr *tb_msg[NL80211_ATTR_MAX + 1]; | |
269 | unsigned int *wiphy = arg; | |
270 | const char *indent = ""; | |
271 | ||
272 | nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), | |
273 | genlmsg_attrlen(gnlh, 0), NULL); | |
274 | ||
275 | if (wiphy && tb_msg[NL80211_ATTR_WIPHY]) { | |
276 | unsigned int thiswiphy = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY]); | |
277 | indent = "\t"; | |
278 | if (*wiphy != thiswiphy) | |
279 | printf("phy#%d\n", thiswiphy); | |
280 | *wiphy = thiswiphy; | |
281 | } | |
282 | ||
283 | if (tb_msg[NL80211_ATTR_IFNAME]) | |
284 | printf("%sInterface %s\n", indent, nla_get_string(tb_msg[NL80211_ATTR_IFNAME])); | |
285 | else | |
286 | printf("%sUnnamed/non-netdev interface\n", indent); | |
287 | if (tb_msg[NL80211_ATTR_IFINDEX]) | |
288 | printf("%s\tifindex %d\n", indent, nla_get_u32(tb_msg[NL80211_ATTR_IFINDEX])); | |
289 | if (tb_msg[NL80211_ATTR_WDEV]) | |
290 | printf("%s\twdev 0x%llx\n", indent, | |
291 | (unsigned long long)nla_get_u64(tb_msg[NL80211_ATTR_WDEV])); | |
292 | if (tb_msg[NL80211_ATTR_MAC]) { | |
293 | char mac_addr[20]; | |
294 | mac_addr_n2a(mac_addr, nla_data(tb_msg[NL80211_ATTR_MAC])); | |
295 | printf("%s\taddr %s\n", indent, mac_addr); | |
296 | } | |
297 | if (tb_msg[NL80211_ATTR_IFTYPE]) | |
298 | printf("%s\ttype %s\n", indent, iftype_name(nla_get_u32(tb_msg[NL80211_ATTR_IFTYPE]))); | |
299 | if (!wiphy && tb_msg[NL80211_ATTR_WIPHY]) | |
300 | printf("%s\twiphy %d\n", indent, nla_get_u32(tb_msg[NL80211_ATTR_WIPHY])); | |
301 | if (tb_msg[NL80211_ATTR_WIPHY_FREQ]) { | |
302 | uint32_t freq = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_FREQ]); | |
303 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
304 | ||
305 | if (tb_msg[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) | |
306 | channel_type = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); | |
307 | ||
308 | printf("%s\tchannel %d (%d MHz) %s\n", indent, | |
309 | ieee80211_frequency_to_channel(freq), freq, | |
310 | channel_type_name(channel_type)); | |
311 | } | |
312 | ||
313 | return NL_SKIP; | |
314 | } | |
315 | ||
316 | static int handle_interface_info(struct nl80211_state *state, | |
317 | struct nl_cb *cb, | |
318 | struct nl_msg *msg, | |
319 | int argc, char **argv, | |
320 | enum id_input id) | |
321 | { | |
322 | nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, NULL); | |
323 | return 0; | |
324 | } | |
325 | TOPLEVEL(info, NULL, NL80211_CMD_GET_INTERFACE, 0, CIB_NETDEV, handle_interface_info, | |
326 | "Show information for this interface."); | |
327 | ||
328 | static int handle_interface_set(struct nl80211_state *state, | |
329 | struct nl_cb *cb, | |
330 | struct nl_msg *msg, | |
331 | int argc, char **argv, | |
332 | enum id_input id) | |
333 | { | |
334 | if (!argc) | |
335 | return 1; | |
336 | ||
337 | NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_MONITOR); | |
338 | ||
339 | switch (parse_mntr_flags(&argc, &argv, msg)) { | |
340 | case 0: | |
341 | return 0; | |
342 | case -ENOMEM: | |
343 | fprintf(stderr, "failed to allocate flags\n"); | |
344 | return 2; | |
345 | case -EINVAL: | |
346 | fprintf(stderr, "unknown flag %s\n", *argv); | |
347 | return 2; | |
348 | default: | |
349 | return 2; | |
350 | } | |
351 | nla_put_failure: | |
352 | return -ENOBUFS; | |
353 | } | |
354 | COMMAND(set, monitor, "<flag>*", | |
355 | NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_set, | |
356 | "Set monitor flags. Valid flags are:\n" | |
357 | VALID_FLAGS); | |
358 | ||
359 | static int handle_interface_meshid(struct nl80211_state *state, | |
360 | struct nl_cb *cb, | |
361 | struct nl_msg *msg, | |
362 | int argc, char **argv, | |
363 | enum id_input id) | |
364 | { | |
365 | char *mesh_id = NULL; | |
366 | ||
367 | if (argc != 1) | |
368 | return 1; | |
369 | ||
370 | mesh_id = argv[0]; | |
371 | ||
372 | NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(mesh_id), mesh_id); | |
373 | ||
374 | return 0; | |
375 | nla_put_failure: | |
376 | return -ENOBUFS; | |
377 | } | |
378 | COMMAND(set, meshid, "<meshid>", | |
379 | NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_meshid, NULL); | |
380 | ||
381 | static unsigned int dev_dump_wiphy; | |
382 | ||
383 | static int handle_dev_dump(struct nl80211_state *state, | |
384 | struct nl_cb *cb, | |
385 | struct nl_msg *msg, | |
386 | int argc, char **argv, | |
387 | enum id_input id) | |
388 | { | |
389 | dev_dump_wiphy = -1; | |
390 | nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_iface_handler, &dev_dump_wiphy); | |
391 | return 0; | |
392 | } | |
393 | TOPLEVEL(dev, NULL, NL80211_CMD_GET_INTERFACE, NLM_F_DUMP, CIB_NONE, handle_dev_dump, | |
394 | "List all network interfaces for wireless hardware."); | |
395 | ||
396 | static int handle_interface_type(struct nl80211_state *state, | |
397 | struct nl_cb *cb, | |
398 | struct nl_msg *msg, | |
399 | int argc, char **argv, | |
400 | enum id_input id) | |
401 | { | |
402 | enum nl80211_iftype type; | |
403 | int tpset; | |
404 | ||
405 | tpset = get_if_type(&argc, &argv, &type, false); | |
406 | if (tpset) | |
407 | return tpset; | |
408 | ||
409 | if (argc) | |
410 | return 1; | |
411 | ||
412 | NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, type); | |
413 | ||
414 | return 0; | |
415 | nla_put_failure: | |
416 | return -ENOBUFS; | |
417 | } | |
418 | COMMAND(set, type, "<type>", | |
419 | NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_type, | |
420 | "Set interface type/mode.\n" | |
421 | IFACE_TYPES); | |
422 | ||
423 | static int handle_interface_4addr(struct nl80211_state *state, | |
424 | struct nl_cb *cb, | |
425 | struct nl_msg *msg, | |
426 | int argc, char **argv, | |
427 | enum id_input id) | |
428 | { | |
429 | if (argc != 1) | |
430 | return 1; | |
431 | return parse_4addr_flag(argv[0], msg); | |
432 | } | |
433 | COMMAND(set, 4addr, "<on|off>", | |
434 | NL80211_CMD_SET_INTERFACE, 0, CIB_NETDEV, handle_interface_4addr, | |
435 | "Set interface 4addr (WDS) mode."); | |
436 | ||
437 | static int handle_interface_noack_map(struct nl80211_state *state, | |
438 | struct nl_cb *cb, | |
439 | struct nl_msg *msg, | |
440 | int argc, char **argv, | |
441 | enum id_input id) | |
442 | { | |
443 | uint16_t noack_map; | |
444 | char *end; | |
445 | ||
446 | if (argc != 1) | |
447 | return 1; | |
448 | ||
449 | noack_map = strtoul(argv[0], &end, 16); | |
450 | if (*end) | |
451 | return 1; | |
452 | ||
453 | NLA_PUT_U16(msg, NL80211_ATTR_NOACK_MAP, noack_map); | |
454 | ||
455 | return 0; | |
456 | nla_put_failure: | |
457 | return -ENOBUFS; | |
458 | ||
459 | } | |
460 | COMMAND(set, noack_map, "<map>", | |
461 | NL80211_CMD_SET_NOACK_MAP, 0, CIB_NETDEV, handle_interface_noack_map, | |
462 | "Set the NoAck map for the TIDs. (0x0009 = BE, 0x0006 = BK, 0x0030 = VI, 0x00C0 = VO)"); | |
463 | ||
464 | ||
465 | static int handle_interface_wds_peer(struct nl80211_state *state, | |
466 | struct nl_cb *cb, | |
467 | struct nl_msg *msg, | |
468 | int argc, char **argv, | |
469 | enum id_input id) | |
470 | { | |
471 | unsigned char mac_addr[ETH_ALEN]; | |
472 | ||
473 | if (argc < 1) | |
474 | return 1; | |
475 | ||
476 | if (mac_addr_a2n(mac_addr, argv[0])) { | |
477 | fprintf(stderr, "Invalid MAC address\n"); | |
478 | return 2; | |
479 | } | |
480 | ||
481 | argc--; | |
482 | argv++; | |
483 | ||
484 | if (argc) | |
485 | return 1; | |
486 | ||
487 | NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); | |
488 | ||
489 | return 0; | |
490 | nla_put_failure: | |
491 | return -ENOBUFS; | |
492 | } | |
493 | COMMAND(set, peer, "<MAC address>", | |
494 | NL80211_CMD_SET_WDS_PEER, 0, CIB_NETDEV, handle_interface_wds_peer, | |
495 | "Set interface WDS peer."); |