1 /****************************************************************************** 2 * 3 * Copyright (C) 2014 Google, Inc. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #define LOG_TAG "bt_btif_sock_sdp" 20 21 #include "btif_sock_sdp.h" 22 23 #include <errno.h> 24 #include <sys/socket.h> 25 #include <sys/types.h> 26 27 #include <hardware/bluetooth.h> 28 #include <hardware/bt_sock.h> 29 30 #include "../bta/pb/bta_pbs_int.h" 31 #include "../include/bta_op_api.h" 32 #include "bt_target.h" 33 #include "bta_api.h" 34 #include "bta_jv_api.h" 35 #include "btif_common.h" 36 #include "btif_sock_util.h" 37 #include "btif_util.h" 38 #include "btm_api.h" 39 #include "btm_int.h" 40 #include "btu.h" 41 #include "bt_common.h" 42 #include "hcimsgs.h" 43 #include "sdp_api.h" 44 #include "utl.h" 45 46 // This module provides an abstraction on top of the lower-level SDP database 47 // code for registration and discovery of various bluetooth sockets. 48 // 49 // This code also provides for on-demand registration of "pre-registered" 50 // services as a backwards compatibility function to third-party applications 51 // expecting a bluez stack. 52 53 // Realm Character Set -- 0 is ASCII 54 #define BTA_PBS_REALM_CHARSET 0 55 56 // Specifies whether or not client's user id is required during obex 57 // authentication 58 #define BTA_PBS_USERID_REQ FALSE 59 60 static const tBTA_PBS_CFG bta_pbs_cfg = { 61 BTA_PBS_REALM_CHARSET, // realm_charset: Server only 62 BTA_PBS_USERID_REQ, // userid_req: Server only 63 (BTA_PBS_SUPF_DOWNLOAD | BTA_PBS_SURF_BROWSE), // supported_features 64 BTA_PBS_REPOSIT_LOCAL, // supported_repositories 65 }; 66 67 // object format lookup table 68 #define OBEX_PUSH_NUM_FORMATS 7 69 70 static const tBTA_OP_FMT bta_ops_obj_fmt[OBEX_PUSH_NUM_FORMATS] = { 71 BTA_OP_VCARD21_FMT, 72 BTA_OP_VCARD30_FMT, 73 BTA_OP_VCAL_FMT, 74 BTA_OP_ICAL_FMT, 75 BTA_OP_VNOTE_FMT, 76 BTA_OP_VMSG_FMT, 77 BTA_OP_OTHER_FMT 78 }; 79 80 // TODO(jtgans): Figure out if we actually need this define. This is ifndef 81 // defined in bt_target.h, but nowhere else, so right now, unless something 82 // overrides this before bt_target.h sets it, it will always be bt_target.h's 83 // version. 84 #ifndef BTUI_OPS_FORMATS 85 #define BTUI_OPS_FORMATS (BTA_OP_VCARD21_MASK \ 86 | BTA_OP_VCARD30_MASK \ 87 | BTA_OP_VCAL_MASK \ 88 | BTA_OP_ICAL_MASK \ 89 | BTA_OP_VNOTE_MASK \ 90 | BTA_OP_VMSG_MASK \ 91 | BTA_OP_ANY_MASK) 92 #endif 93 94 #define RESERVED_SCN_PBS 19 95 #define RESERVED_SCN_OPS 12 96 97 #define UUID_MAX_LENGTH 16 98 #define UUID_MATCHES(u1, u2) !memcmp(u1, u2, UUID_MAX_LENGTH) 99 100 // Adds a protocol list and service name (if provided) to an SDP record given by 101 // |sdp_handle|, and marks it as browseable. This is a shortcut for defining a 102 // set of protocols that includes L2CAP, RFCOMM, and optionally OBEX. If 103 // |with_obex| is |TRUE|, then an additional OBEX protocol UUID will be included 104 // at the end of the protocol list. 105 // 106 // Returns TRUE if successful, otherwise FALSE. 107 static bool create_base_record(const uint32_t sdp_handle, const char *name, 108 const uint16_t channel, const bool with_obex) { 109 APPL_TRACE_DEBUG("create_base_record: scn: %d, name: %s, with_obex: %d", 110 channel, name, with_obex); 111 112 // Setup the protocol list and add it. 113 tSDP_PROTOCOL_ELEM proto_list[SDP_MAX_LIST_ELEMS]; 114 int num_proto_elements = with_obex ? 3 : 2; 115 116 memset(proto_list, 0, num_proto_elements * sizeof(tSDP_PROTOCOL_ELEM)); 117 118 proto_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP; 119 proto_list[0].num_params = 0; 120 proto_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM; 121 proto_list[1].num_params = 1; 122 proto_list[1].params[0] = channel; 123 124 if (with_obex == TRUE) { 125 proto_list[2].protocol_uuid = UUID_PROTOCOL_OBEX; 126 proto_list[2].num_params = 0; 127 } 128 129 char *stage = "protocol_list"; 130 if (!SDP_AddProtocolList(sdp_handle, num_proto_elements, proto_list)) 131 goto error; 132 133 // Add the name to the SDP record. 134 if (name[0] != '\0') { 135 stage = "service_name"; 136 if (!SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, 137 TEXT_STR_DESC_TYPE, (uint32_t)(strlen(name) + 1), 138 (uint8_t *)name)) 139 goto error; 140 } 141 142 // Mark the service as browseable. 143 uint16_t list = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP; 144 stage = "browseable"; 145 if (!SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, &list)) 146 goto error; 147 148 APPL_TRACE_DEBUG("create_base_record: successfully created base service " 149 "record, handle: 0x%08x, scn: %d, name: %s, with_obex: %d", 150 sdp_handle, channel, name, with_obex); 151 return TRUE; 152 153 error: 154 APPL_TRACE_ERROR("create_base_record: failed to create base service " 155 "record, stage: %s, scn: %d, name: %s, with_obex: %d", 156 stage, channel, name, with_obex); 157 return FALSE; 158 } 159 160 // Registers a service with the given |name|, |uuid|, and |channel| in the SDP 161 // database as a generic L2CAP RFCOMM protocol, storing its |uuid| as a service 162 // class sequence. 163 static int add_sdp_by_uuid(const char *name, const uint8_t *uuid, 164 const uint16_t channel) { 165 APPL_TRACE_DEBUG("add_sdp_by_uuid: scn: %d, service_name: %s", channel, name); 166 167 uint32_t handle = SDP_CreateRecord(); 168 if (handle == 0) { 169 APPL_TRACE_ERROR("add_sdp_by_uuid: failed to create sdp record, " 170 "scn: %d, service_name: %s", channel, name); 171 return 0; 172 } 173 174 // Create the base SDP record. 175 char *stage = "create_base_record"; 176 if (!create_base_record(handle, name, channel, FALSE /* with_obex */)) 177 goto error; 178 179 // Convert the |uuid| into a big-endian representation and add it as a 180 // sequence. 181 uint8_t type = UUID_DESC_TYPE; 182 uint8_t type_len = UUID_MAX_LENGTH; 183 uint8_t type_buf[48]; 184 // Store the address of type buf in a pointer on the stack, so we can pass 185 // a double pointer to SDP_AddSequence 186 uint8_t *type_buf_ptr = type_buf; 187 188 // Do the conversion to big-endian -- tmp is only used to iterate through the 189 // UUID array in the macro and serves no other purpose as the conversion 190 // macros are not hygenic. 191 { 192 uint8_t *tmp = type_buf; 193 ARRAY_TO_BE_STREAM(tmp, uuid, UUID_MAX_LENGTH); 194 } 195 196 stage = "service_class_sequence"; 197 if (!SDP_AddSequence(handle, (uint16_t)ATTR_ID_SERVICE_CLASS_ID_LIST, 198 1, &type, &type_len, &type_buf_ptr)) 199 goto error; 200 201 APPL_TRACE_DEBUG("add_sdp_by_uuid: service registered successfully, " 202 "service_name: %s, handle: 0x%08x", name, handle); 203 return handle; 204 205 error: 206 SDP_DeleteRecord(handle); 207 APPL_TRACE_ERROR("add_sdp_by_uuid: failed to register service " 208 "stage: %s, service_name: %s", stage, name); 209 return 0; 210 } 211 212 // Registers a service with the given |name| and |channel| in the SDP 213 // database as a PBAP protocol. 214 static int add_pbap_sdp(const char *name, const int channel) { 215 APPL_TRACE_DEBUG("add_pbap_sdp: scn %d, service_name %s", channel, name); 216 217 uint32_t handle = SDP_CreateRecord(); 218 if (handle == 0) { 219 APPL_TRACE_ERROR("add_pbap_sdp: failed to create sdp record, " 220 "service_name: %s", name); 221 return 0; 222 } 223 224 // Create the base SDP record. 225 char *stage = "create_base_record"; 226 if (!create_base_record(handle, name, channel, TRUE /* with_obex */)) 227 goto error; 228 229 // Add service class 230 uint16_t service = UUID_SERVCLASS_PBAP_PSE; 231 stage = "service_class"; 232 if (!SDP_AddServiceClassIdList(handle, 1, &service)) 233 goto error; 234 235 // Add in the phone access descriptor 236 stage = "profile_descriptor_list"; 237 if (!SDP_AddProfileDescriptorList(handle, 238 UUID_SERVCLASS_PHONE_ACCESS, 239 BTA_PBS_DEFAULT_VERSION)) 240 goto error; 241 242 // Set up our supported repositories 243 stage = "supported_repositories"; 244 if (!SDP_AddAttribute(handle, ATTR_ID_SUPPORTED_REPOSITORIES, UINT_DESC_TYPE, 245 1, (uint8_t*)&bta_pbs_cfg.supported_repositories)) 246 goto error; 247 248 // Notify the system that we've got a new service class UUID. 249 bta_sys_add_uuid(UUID_SERVCLASS_PBAP_PSE); 250 APPL_TRACE_DEBUG("add_pbap_sdp: service registered successfully, " 251 "service_name: %s, handle: 0x%08x", name, handle); 252 253 return handle; 254 255 error: 256 SDP_DeleteRecord(handle); 257 APPL_TRACE_ERROR("add_pbap_sdp: failed to register PBAP service, stage: %s, " 258 "service_name: %s", stage, name); 259 return 0; 260 } 261 // Registers a service with the given |name| and |channel| as an OBEX Push 262 // protocol. 263 static int add_ops_sdp(const char *name, const int channel) { 264 APPL_TRACE_DEBUG("add_ops_sdp: scn %d, service_name %s", channel, name); 265 266 uint32_t handle = SDP_CreateRecord(); 267 if (handle == 0) { 268 APPL_TRACE_ERROR("add_ops_sdp: failed to create sdp record, " 269 "service_name: %s", name); 270 return 0; 271 } 272 273 // Create the base SDP record. 274 char *stage = "create_base_record"; 275 if (!create_base_record(handle, name, channel, TRUE /* with_obex */)) 276 goto error; 277 278 // Add service class. 279 stage = "service_class"; 280 uint16_t service = UUID_SERVCLASS_OBEX_OBJECT_PUSH; 281 if (!SDP_AddServiceClassIdList(handle, 1, &service)) 282 goto error; 283 284 // Add the OBEX push profile descriptor. 285 stage = "profile_descriptor_list"; 286 if (!SDP_AddProfileDescriptorList(handle, UUID_SERVCLASS_OBEX_OBJECT_PUSH, 287 0x0100)) 288 goto error; 289 290 // Add sequence for supported types. 291 uint8_t desc_type[OBEX_PUSH_NUM_FORMATS]; 292 uint8_t type_len[OBEX_PUSH_NUM_FORMATS]; 293 uint8_t *type_value[OBEX_PUSH_NUM_FORMATS]; 294 uint8_t j = 0; 295 296 for (int i = 0; i < OBEX_PUSH_NUM_FORMATS; i++) { 297 if ((BTUI_OPS_FORMATS >> i) & 1) { 298 type_value[j] = (uint8_t*)(&bta_ops_obj_fmt[i]); 299 desc_type[j] = UINT_DESC_TYPE; 300 type_len[j++] = 1; 301 } 302 } 303 304 stage = "supported_types"; 305 if (!SDP_AddSequence(handle, (uint16_t)ATTR_ID_SUPPORTED_FORMATS_LIST, 306 j, desc_type, type_len, type_value)) 307 goto error; 308 309 // Set class of device. 310 tBTA_UTL_COD cod; 311 cod.service = BTM_COD_SERVICE_OBJ_TRANSFER; 312 stage = "class_of_device"; 313 if (!utl_set_device_class(&cod, BTA_UTL_SET_COD_SERVICE_CLASS)) 314 goto error; 315 316 // Notify the system that we've got a new service class UUID. 317 bta_sys_add_uuid(UUID_SERVCLASS_OBEX_OBJECT_PUSH); 318 APPL_TRACE_DEBUG("ad_maps_sdp: service registered successfully, " 319 "service_name: %s, handle 0x%08x)", name, handle); 320 321 return handle; 322 323 error: 324 SDP_DeleteRecord(handle); 325 APPL_TRACE_ERROR("add_ops_sdp: failed to register OPS service, " 326 "stage: %s, service_name: %s", stage, name); 327 return 0; 328 } 329 330 // Registers a service with the given |name| and |channel| as a serial port 331 // profile protocol. 332 static int add_spp_sdp(const char *name, const int channel) { 333 APPL_TRACE_DEBUG("add_spp_sdp: scn %d, service_name %s", channel, name); 334 335 int handle = SDP_CreateRecord(); 336 if (handle == 0) { 337 APPL_TRACE_ERROR("add_spp_sdp: failed to create sdp record, " 338 "service_name: %s", name); 339 return 0; 340 } 341 342 // Create the base SDP record. 343 char *stage = "create_base_record"; 344 if (!create_base_record(handle, name, channel, FALSE /* with_obex */)) 345 goto error; 346 347 uint16_t service = UUID_SERVCLASS_SERIAL_PORT; 348 stage = "service_class"; 349 if (!SDP_AddServiceClassIdList(handle, 1, &service)) 350 goto error; 351 352 APPL_TRACE_DEBUG("add_spp_sdp: service registered successfully, " 353 "service_name: %s, handle 0x%08x)", name, handle); 354 355 return handle; 356 357 error: 358 SDP_DeleteRecord(handle); 359 APPL_TRACE_ERROR("add_spp_sdp: failed to register SPP service, " 360 "stage: %s, service_name: %s", stage, name); 361 return 0; 362 } 363 364 // Adds an RFCOMM SDP record for a service with the given |name|, |uuid|, and 365 // |channel|. This function attempts to identify the type of the service based 366 // upon its |uuid|, and will override the |channel| with a reserved channel 367 // number if the |uuid| matches one of the preregistered bluez SDP records. 368 static int add_rfc_sdp_by_uuid(const char *name, const uint8_t *uuid, 369 const int channel) { 370 APPL_TRACE_DEBUG("add_rfc_sdp_by_uuid: service_name: %s, channel: %d", name, 371 channel); 372 373 /* 374 * Bluetooth Socket API relies on having preregistered bluez sdp records for 375 * HSAG, HFAG, OPP & PBAP that are mapped to rc chan 10, 11,12 & 19. Today 376 * HSAG and HFAG is routed to BRCM AG and are not using BT socket API so for 377 * now we will need to support OPP and PBAP to enable 3rd party developer apps 378 * running on BRCM Android. 379 * 380 * To do this we will check the UUID for the requested service and mimic the 381 * SDP records of bluez upon reception. See functions add_opush() and 382 * add_pbap() in sdptool.c for actual records. 383 */ 384 385 int final_channel = get_reserved_rfc_channel(uuid); 386 387 if (final_channel == -1) { 388 final_channel = channel; 389 } 390 391 int handle = 0; 392 393 if (UUID_MATCHES(UUID_OBEX_OBJECT_PUSH, uuid)) { 394 handle = add_ops_sdp(name, final_channel); 395 } else if (UUID_MATCHES(UUID_PBAP_PSE,uuid)) { 396 // PBAP Server is always channel 19 397 handle = add_pbap_sdp(name, final_channel); 398 } else if (UUID_MATCHES(UUID_SPP, uuid)) { 399 handle = add_spp_sdp(name, final_channel); 400 } else if (UUID_MATCHES(UUID_MAP_MAS,uuid)) { 401 // Record created by new SDP create record interface 402 handle = 0xff; 403 } else { 404 handle = add_sdp_by_uuid(name, uuid, final_channel); 405 } 406 407 return handle; 408 } 409 410 bool is_reserved_rfc_channel(const int channel) { 411 switch(channel) { 412 case RESERVED_SCN_PBS: 413 case RESERVED_SCN_OPS: 414 return TRUE; 415 } 416 417 return FALSE; 418 } 419 420 int get_reserved_rfc_channel(const uint8_t *uuid) { 421 if (UUID_MATCHES(UUID_PBAP_PSE, uuid)) { 422 return RESERVED_SCN_PBS; 423 } else if (UUID_MATCHES(UUID_OBEX_OBJECT_PUSH, uuid)) { 424 return RESERVED_SCN_OPS; 425 } 426 427 return -1; 428 } 429 430 // Adds an SDP record to the SDP database using the given |name|, |uuid|, and 431 // |channel|. Note that if the |uuid| is empty, the |uuid| will be set based 432 // upon the |channel| passed in. 433 int add_rfc_sdp_rec(const char *name, const uint8_t *uuid, const int channel) { 434 if (is_uuid_empty(uuid)) { 435 switch(channel) { 436 case RESERVED_SCN_PBS: // PBAP Reserved port 437 uuid = UUID_PBAP_PSE; 438 break; 439 440 case RESERVED_SCN_OPS: 441 uuid = UUID_OBEX_OBJECT_PUSH; 442 break; 443 444 default: 445 uuid = UUID_SPP; 446 break; 447 } 448 } 449 450 return add_rfc_sdp_by_uuid(name, uuid, channel); 451 } 452 453 // Deletes an SDP record with the given |handle|. 454 void del_rfc_sdp_rec(int handle) { 455 APPL_TRACE_DEBUG("del_rfc_sdp_rec: handle:0x%x", handle); 456 457 if ((handle != -1) && (handle != 0)) 458 BTA_JvDeleteRecord(handle); 459 } 460
