Sunil Ravi | 44e0e58 | 2022-03-05 11:09:09 -0800 | [diff] [blame] | 1 | #include <net/if.h> |
| 2 | #include <errno.h> |
| 3 | #include <string.h> |
| 4 | |
| 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> |
| 10 | |
| 11 | #include <ctype.h> |
| 12 | #include <inttypes.h> |
| 13 | #include "nl80211.h" |
| 14 | #include "iw.h" |
| 15 | #include "sha256.h" |
| 16 | |
| 17 | SECTION(nan); |
| 18 | |
| 19 | static int parse_bands(int argc, char **argv) |
| 20 | { |
| 21 | int i = 0, bands = 0; |
| 22 | |
| 23 | for (i = 0; i < argc; i++) { |
| 24 | if (!strcasecmp("2ghz", argv[i])) |
| 25 | bands |= BIT(NL80211_BAND_2GHZ); |
| 26 | else if (!strcasecmp("5ghz", argv[i])) |
| 27 | bands |= BIT(NL80211_BAND_5GHZ); |
| 28 | else |
| 29 | return -EINVAL; |
| 30 | } |
| 31 | |
| 32 | return bands; |
| 33 | } |
| 34 | |
| 35 | static int handle_nan_start(struct nl80211_state *state, |
| 36 | struct nl_msg *msg, int argc, char **argv, |
| 37 | enum id_input id) |
| 38 | { |
| 39 | int bands = 0; |
| 40 | |
| 41 | if (argc < 2) |
| 42 | return -EINVAL; |
| 43 | |
| 44 | if (strcmp(argv[0], "pref") == 0) { |
| 45 | argv++; |
| 46 | argc--; |
| 47 | NLA_PUT_U8(msg, NL80211_ATTR_NAN_MASTER_PREF, atoi(argv[0])); |
| 48 | argv++; |
| 49 | argc--; |
| 50 | } else { |
| 51 | /* Master preference is mandatory */ |
| 52 | return -EINVAL; |
| 53 | } |
| 54 | |
| 55 | if (argc > 1 && !strcmp(argv[0], "bands")) { |
| 56 | argv++; |
| 57 | argc--; |
| 58 | |
| 59 | bands = parse_bands(argc, argv); |
| 60 | if (bands < 0) |
| 61 | return bands; |
| 62 | |
| 63 | NLA_PUT_U32(msg, NL80211_ATTR_BANDS, bands); |
| 64 | } else if (argc != 0) |
| 65 | return -EINVAL; |
| 66 | |
| 67 | return 0; |
| 68 | nla_put_failure: |
| 69 | return -ENOBUFS; |
| 70 | } |
| 71 | COMMAND(nan, start, "pref <pref> [bands [2GHz] [5GHz]]", |
| 72 | NL80211_CMD_START_NAN, 0, CIB_WDEV, handle_nan_start, ""); |
| 73 | |
| 74 | static int handle_nan_stop(struct nl80211_state *state, |
| 75 | struct nl_msg *msg, int argc, char **argv, |
| 76 | enum id_input id) |
| 77 | { |
| 78 | return 0; |
| 79 | } |
| 80 | COMMAND(nan, stop, "", NL80211_CMD_STOP_NAN, 0, CIB_WDEV, handle_nan_stop, ""); |
| 81 | |
| 82 | static int handle_nan_config(struct nl80211_state *state, |
| 83 | struct nl_msg *msg, int argc, char **argv, |
| 84 | enum id_input id) |
| 85 | { |
| 86 | int bands = 0; |
| 87 | |
| 88 | if (argc < 2) |
| 89 | return -EINVAL; |
| 90 | |
| 91 | if (strcmp(argv[0], "pref") == 0) { |
| 92 | argv++; |
| 93 | argc--; |
| 94 | NLA_PUT_U8(msg, NL80211_ATTR_NAN_MASTER_PREF, atoi(argv[0])); |
| 95 | argv++; |
| 96 | argc--; |
| 97 | } |
| 98 | |
| 99 | if (argc > 1 && !strcmp(argv[0], "bands")) { |
| 100 | argv++; |
| 101 | argc--; |
| 102 | |
| 103 | bands = parse_bands(argc, argv); |
| 104 | if (bands < 0) |
| 105 | return bands; |
| 106 | |
| 107 | NLA_PUT_U32(msg, NL80211_ATTR_BANDS, bands); |
| 108 | argv++; |
| 109 | argc--; |
| 110 | } else if (argc != 0) |
| 111 | return -EINVAL; |
| 112 | |
| 113 | return 0; |
| 114 | nla_put_failure: |
| 115 | return -ENOBUFS; |
| 116 | } |
| 117 | COMMAND(nan, config, "[pref <pref>] [bands [2GHz] [5GHz]]", |
| 118 | NL80211_CMD_CHANGE_NAN_CONFIG, 0, CIB_WDEV, handle_nan_config, ""); |
| 119 | |
| 120 | static int handle_nan_rm_func(struct nl80211_state *state, |
| 121 | struct nl_msg *msg, int argc, char **argv, |
| 122 | enum id_input id) |
| 123 | { |
| 124 | if (argc != 2) |
| 125 | return -EINVAL; |
| 126 | |
| 127 | if (strcmp(argv[0], "cookie") == 0) { |
| 128 | argv++; |
| 129 | argc--; |
| 130 | NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, atoi(argv[0])); |
| 131 | argv++; |
| 132 | argc--; |
| 133 | } |
| 134 | |
| 135 | if (argc != 0) |
| 136 | return -EINVAL; |
| 137 | |
| 138 | return 0; |
| 139 | nla_put_failure: |
| 140 | return -ENOBUFS; |
| 141 | } |
| 142 | COMMAND(nan, rm_func, "cookie <cookie>", NL80211_CMD_DEL_NAN_FUNCTION, 0, |
| 143 | CIB_WDEV, handle_nan_rm_func, ""); |
| 144 | |
| 145 | static int compute_service_id(const unsigned char *serv_name, |
| 146 | unsigned int len, unsigned char *res) |
| 147 | { |
| 148 | size_t size = len; |
| 149 | unsigned char md_value[32]; |
| 150 | int retcode = sha256(serv_name, size, md_value); |
| 151 | |
| 152 | if (retcode) |
| 153 | return retcode; |
| 154 | memcpy(res, md_value, 6); |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | static int print_instance_id_handler(struct nl_msg *msg, void *arg) |
| 160 | { |
| 161 | struct nlattr *tb[NL80211_ATTR_MAX + 1]; |
| 162 | struct nlattr *func[NL80211_NAN_FUNC_ATTR_MAX + 1]; |
| 163 | struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); |
| 164 | |
| 165 | nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), |
| 166 | genlmsg_attrlen(gnlh, 0), NULL); |
| 167 | |
| 168 | if (!tb[NL80211_ATTR_COOKIE]) { |
| 169 | fprintf(stderr, "cookie is missing!\n"); |
| 170 | return NL_SKIP; |
| 171 | } |
| 172 | |
| 173 | nla_parse_nested(func, NL80211_NAN_FUNC_ATTR_MAX, |
| 174 | tb[NL80211_ATTR_NAN_FUNC], |
| 175 | NULL); |
| 176 | if (!func[NL80211_NAN_FUNC_INSTANCE_ID]) { |
| 177 | fprintf(stderr, "instance id is missing!\n"); |
| 178 | return NL_SKIP; |
| 179 | } |
| 180 | |
| 181 | printf("instance_id: %d, cookie: %" PRIu64 "\n", |
| 182 | nla_get_u8(func[NL80211_NAN_FUNC_INSTANCE_ID]), |
| 183 | nla_get_u64(tb[NL80211_ATTR_COOKIE])); |
| 184 | |
| 185 | return NL_SKIP; |
| 186 | } |
| 187 | |
| 188 | static int parse_srf(char **argv, int argc, struct nl_msg *func_attrs) |
| 189 | { |
| 190 | struct nl_msg *srf_attrs; |
| 191 | int old_argc = argc; |
| 192 | unsigned char mac_addr[ETH_ALEN]; |
| 193 | char *cur_mac, *sptr = NULL; |
| 194 | |
| 195 | srf_attrs = nlmsg_alloc(); |
| 196 | if (strcmp(argv[0], "include") == 0) |
| 197 | NLA_PUT_FLAG(srf_attrs, NL80211_NAN_SRF_INCLUDE); |
| 198 | else if (strcmp(argv[0], "exclude") != 0) |
| 199 | return -EINVAL; |
| 200 | |
| 201 | argc--; |
| 202 | argv++; |
| 203 | if (strcmp(argv[0], "bf") == 0) { |
| 204 | unsigned char *srf; |
| 205 | size_t srf_len; |
| 206 | __u8 bf_idx; |
| 207 | int err; |
| 208 | |
| 209 | argc--; |
| 210 | argv++; |
| 211 | |
| 212 | if (argc < 3) |
| 213 | return -EINVAL; |
| 214 | |
| 215 | bf_idx = atoi(argv[0]); |
| 216 | NLA_PUT_U8(srf_attrs, NL80211_NAN_SRF_BF_IDX, bf_idx); |
| 217 | |
| 218 | argc--; |
| 219 | argv++; |
| 220 | srf_len = atoi(argv[0]); |
| 221 | if (srf_len == 0 || srf_len > NL80211_NAN_FUNC_SRF_MAX_LEN) |
| 222 | return -EINVAL; |
| 223 | |
| 224 | argc--; |
| 225 | argv++; |
| 226 | srf = malloc(srf_len); |
| 227 | if (!srf) |
| 228 | return -ENOBUFS; |
| 229 | |
| 230 | memset(srf, 0, srf_len); |
| 231 | cur_mac = strtok_r(argv[0], ";", &sptr); |
| 232 | while (cur_mac) { |
| 233 | if (mac_addr_a2n(mac_addr, cur_mac)) { |
| 234 | printf("mac format error %s\n", cur_mac); |
| 235 | free(srf); |
| 236 | return -EINVAL; |
| 237 | } |
| 238 | |
| 239 | nan_bf(bf_idx, srf, srf_len, mac_addr, ETH_ALEN); |
| 240 | cur_mac = strtok_r(NULL, ";", &sptr); |
| 241 | } |
| 242 | |
| 243 | err = nla_put(srf_attrs, NL80211_NAN_SRF_BF, srf_len, srf); |
| 244 | free(srf); |
| 245 | if (err) |
| 246 | goto nla_put_failure; |
| 247 | argv++; |
| 248 | argc--; |
| 249 | } else if (strcmp(argv[0], "list") == 0) { |
| 250 | struct nlattr *nl_macs = nla_nest_start(srf_attrs, |
| 251 | NL80211_NAN_SRF_MAC_ADDRS); |
| 252 | int i = 0; |
| 253 | |
| 254 | argc--; |
| 255 | argv++; |
| 256 | cur_mac = strtok_r(argv[0], ";", &sptr); |
| 257 | while (cur_mac) { |
| 258 | if (mac_addr_a2n(mac_addr, cur_mac)) |
| 259 | return -EINVAL; |
| 260 | |
| 261 | nla_put(srf_attrs, ++i, ETH_ALEN, mac_addr); |
| 262 | cur_mac = strtok_r(NULL, ";", &sptr); |
| 263 | } |
| 264 | |
| 265 | nla_nest_end(srf_attrs, nl_macs); |
| 266 | argv++; |
| 267 | argc--; |
| 268 | } else { |
| 269 | return -EINVAL; |
| 270 | } |
| 271 | |
| 272 | nla_put_nested(func_attrs, NL80211_NAN_FUNC_SRF, srf_attrs); |
| 273 | return old_argc - argc; |
| 274 | nla_put_failure: |
| 275 | return -ENOBUFS; |
| 276 | } |
| 277 | |
| 278 | static void parse_match_filter(char *filter, struct nl_msg *func_attrs, int tx) |
| 279 | { |
| 280 | struct nlattr *nl_filt; |
| 281 | char *cur_filt, *sptr = NULL; |
| 282 | int i = 0; |
| 283 | |
| 284 | if (tx) |
| 285 | nl_filt = nla_nest_start(func_attrs, |
| 286 | NL80211_NAN_FUNC_TX_MATCH_FILTER); |
| 287 | else |
| 288 | nl_filt = nla_nest_start(func_attrs, |
| 289 | NL80211_NAN_FUNC_RX_MATCH_FILTER); |
| 290 | |
| 291 | cur_filt = strtok_r(filter, ":", &sptr); |
| 292 | while (cur_filt) { |
| 293 | if (strcmp(cur_filt, "*") != 0) |
| 294 | nla_put(func_attrs, ++i, strlen(cur_filt), cur_filt); |
| 295 | else |
| 296 | nla_put(func_attrs, ++i, 0, NULL); |
| 297 | |
| 298 | cur_filt = strtok_r(NULL, ":", &sptr); |
| 299 | } |
| 300 | |
| 301 | nla_nest_end(func_attrs, nl_filt); |
| 302 | } |
| 303 | |
| 304 | static int handle_nan_add_func(struct nl80211_state *state, |
| 305 | struct nl_msg *msg, int argc, char **argv, |
| 306 | enum id_input id) |
| 307 | { |
| 308 | struct nl_msg *func_attrs = NULL; |
| 309 | int err = 0; |
| 310 | __u8 type; |
| 311 | |
| 312 | func_attrs = nlmsg_alloc(); |
| 313 | if (!func_attrs) { |
| 314 | err = -ENOBUFS; |
| 315 | goto out; |
| 316 | } |
| 317 | |
| 318 | if (argc > 1 && strcmp(argv[0], "type") == 0) { |
| 319 | argv++; |
| 320 | argc--; |
| 321 | if (strcmp(argv[0], "publish") == 0) |
| 322 | type = NL80211_NAN_FUNC_PUBLISH; |
| 323 | else if (strcmp(argv[0], "subscribe") == 0) |
| 324 | type = NL80211_NAN_FUNC_SUBSCRIBE; |
| 325 | else if (strcmp(argv[0], "followup") == 0) |
| 326 | type = NL80211_NAN_FUNC_FOLLOW_UP; |
| 327 | else |
| 328 | return -EINVAL; |
| 329 | argv++; |
| 330 | argc--; |
| 331 | |
| 332 | NLA_PUT_U8(func_attrs, NL80211_NAN_FUNC_TYPE, type); |
| 333 | } else { |
| 334 | return -EINVAL; |
| 335 | } |
| 336 | |
| 337 | if (type == NL80211_NAN_FUNC_SUBSCRIBE) { |
| 338 | if (argc > 1 && strcmp(argv[0], "active") == 0) { |
| 339 | argv++; |
| 340 | argc--; |
| 341 | NLA_PUT_FLAG(func_attrs, |
| 342 | NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE); |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | if (type == NL80211_NAN_FUNC_PUBLISH) { |
| 347 | __u8 publish_type = 0; |
| 348 | |
| 349 | if (argc > 1 && strcmp(argv[0], "solicited") == 0) { |
| 350 | argv++; |
| 351 | argc--; |
| 352 | publish_type |= NL80211_NAN_SOLICITED_PUBLISH; |
| 353 | } |
| 354 | |
| 355 | if (argc > 1 && strcmp(argv[0], "unsolicited") == 0) { |
| 356 | argv++; |
| 357 | argc--; |
| 358 | publish_type |= NL80211_NAN_UNSOLICITED_PUBLISH; |
| 359 | } |
| 360 | |
| 361 | NLA_PUT_U8(func_attrs, NL80211_NAN_FUNC_PUBLISH_TYPE, |
| 362 | publish_type); |
| 363 | |
| 364 | /* only allow for solicited publish */ |
| 365 | if (argc > 1 && strcmp(argv[0], "bcast") == 0) { |
| 366 | argv++; |
| 367 | argc--; |
| 368 | if (!(publish_type & NL80211_NAN_SOLICITED_PUBLISH)) |
| 369 | return -EINVAL; |
| 370 | |
| 371 | NLA_PUT_FLAG(func_attrs, |
| 372 | NL80211_NAN_FUNC_PUBLISH_BCAST); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | if (argc > 1 && strcmp(argv[0], "close_range") == 0) { |
| 377 | argv++; |
| 378 | argc--; |
| 379 | NLA_PUT_FLAG(func_attrs, NL80211_NAN_FUNC_CLOSE_RANGE); |
| 380 | } |
| 381 | |
| 382 | if (argc > 1 && strcmp(argv[0], "name") == 0) { |
| 383 | unsigned char serv_id_c[6] = {0}; |
| 384 | __u64 service_id; |
| 385 | |
| 386 | argv++; |
| 387 | argc--; |
| 388 | compute_service_id((const unsigned char *)argv[0], |
| 389 | strlen(argv[0]), serv_id_c); |
| 390 | service_id = (__u64)serv_id_c[0] << 0 | |
| 391 | (__u64)serv_id_c[1] << 8 | |
| 392 | (__u64)serv_id_c[2] << 16 | |
| 393 | (__u64)serv_id_c[3] << 24 | |
| 394 | (__u64)serv_id_c[4] << 32 | |
| 395 | (__u64)serv_id_c[5] << 40; |
| 396 | |
| 397 | NLA_PUT(func_attrs, NL80211_NAN_FUNC_SERVICE_ID, 6, |
| 398 | &service_id); |
| 399 | argv++; |
| 400 | argc--; |
| 401 | } else { |
| 402 | return -EINVAL; |
| 403 | } |
| 404 | |
| 405 | if (argc > 1 && strcmp(argv[0], "info") == 0) { |
| 406 | argv++; |
| 407 | argc--; |
| 408 | NLA_PUT(func_attrs, NL80211_NAN_FUNC_SERVICE_INFO, |
| 409 | strlen(argv[0]), argv[0]); |
| 410 | argv++; |
| 411 | argc--; |
| 412 | } |
| 413 | |
| 414 | if (type == NL80211_NAN_FUNC_FOLLOW_UP) { |
| 415 | if (argc > 1 && strcmp(argv[0], "flw_up_id") == 0) { |
| 416 | argv++; |
| 417 | argc--; |
| 418 | NLA_PUT_U8(func_attrs, NL80211_NAN_FUNC_FOLLOW_UP_ID, |
| 419 | atoi(argv[0])); |
| 420 | argv++; |
| 421 | argc--; |
| 422 | } |
| 423 | |
| 424 | if (argc > 1 && strcmp(argv[0], "flw_up_req_id") == 0) { |
| 425 | argv++; |
| 426 | argc--; |
| 427 | NLA_PUT_U8(func_attrs, |
| 428 | NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID, |
| 429 | atoi(argv[0])); |
| 430 | argv++; |
| 431 | argc--; |
| 432 | } |
| 433 | |
| 434 | if (argc > 1 && strcmp(argv[0], "flw_up_dest") == 0) { |
| 435 | unsigned char addr[6]; |
| 436 | |
| 437 | argv++; |
| 438 | argc--; |
| 439 | if (mac_addr_a2n(addr, argv[0])) |
| 440 | goto nla_put_failure; |
| 441 | nla_put(func_attrs, NL80211_NAN_FUNC_FOLLOW_UP_DEST, |
| 442 | ETH_ALEN, addr); |
| 443 | argv++; |
| 444 | argc--; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | if (type != NL80211_NAN_FUNC_FOLLOW_UP && |
| 449 | argc > 1 && strcmp(argv[0], "ttl") == 0) { |
| 450 | argv++; |
| 451 | argc--; |
| 452 | NLA_PUT_U32(func_attrs, NL80211_NAN_FUNC_TTL, atoi(argv[0])); |
| 453 | argv++; |
| 454 | argc--; |
| 455 | } |
| 456 | |
| 457 | if (type != NL80211_NAN_FUNC_FOLLOW_UP && |
| 458 | argc >= 4 && strcmp(argv[0], "srf") == 0) { |
| 459 | int res; |
| 460 | |
| 461 | argv++; |
| 462 | argc--; |
| 463 | res = parse_srf(argv, argc, func_attrs); |
| 464 | if (res < 0) |
| 465 | return -EINVAL; |
| 466 | |
| 467 | argc -= res; |
| 468 | argv += res; |
| 469 | } |
| 470 | |
| 471 | if (type != NL80211_NAN_FUNC_FOLLOW_UP && |
| 472 | argc > 1 && strcmp(argv[0], "rx_filter") == 0) { |
| 473 | argv++; |
| 474 | argc--; |
| 475 | parse_match_filter(argv[0], func_attrs, 0); |
| 476 | |
| 477 | argv++; |
| 478 | argc--; |
| 479 | } |
| 480 | |
| 481 | if (type != NL80211_NAN_FUNC_FOLLOW_UP && |
| 482 | argc > 1 && strcmp(argv[0], "tx_filter") == 0) { |
| 483 | argv++; |
| 484 | argc--; |
| 485 | parse_match_filter(argv[0], func_attrs, 1); |
| 486 | |
| 487 | argv++; |
| 488 | argc--; |
| 489 | } |
| 490 | |
| 491 | if (argc != 0) |
| 492 | return -EINVAL; |
| 493 | |
| 494 | nla_put_nested(msg, NL80211_ATTR_NAN_FUNC, func_attrs); |
| 495 | register_handler(print_instance_id_handler, NULL); |
| 496 | |
| 497 | return err; |
| 498 | nla_put_failure: |
| 499 | return -ENOBUFS; |
| 500 | out: |
| 501 | return err; |
| 502 | } |
| 503 | COMMAND(nan, add_func, |
| 504 | "type <publish|subscribe|followup> [active] [solicited] [unsolicited] [bcast] [close_range] name <name> [info <info>] [flw_up_id <id> flw_up_req_id <id> flw_up_dest <mac>] [ttl <ttl>] [srf <include|exclude> <bf|list> [bf_idx] [bf_len] <mac1;mac2...>] [rx_filter <str1:str2...>] [tx_filter <str1:str2...>]", |
| 505 | NL80211_CMD_ADD_NAN_FUNCTION, 0, CIB_WDEV, |
| 506 | handle_nan_add_func, ""); |