| /****************************************************************************** |
| * |
| * Copyright (C) 1999-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * this file contains the main GATT client functions |
| * |
| ******************************************************************************/ |
| |
| #include "bt_target.h" |
| |
| #include <string.h> |
| #include "bt_common.h" |
| #include "bt_utils.h" |
| #include "gatt_int.h" |
| #include "l2c_int.h" |
| #include "osi/include/osi.h" |
| |
| #define GATT_WRITE_LONG_HDR_SIZE 5 /* 1 opcode + 2 handle + 2 offset */ |
| #define GATT_READ_CHAR_VALUE_HDL (GATT_READ_CHAR_VALUE | 0x80) |
| #define GATT_READ_INC_SRV_UUID128 (GATT_DISC_INC_SRVC | 0x90) |
| |
| #define GATT_PREP_WRITE_RSP_MIN_LEN 4 |
| #define GATT_NOTIFICATION_MIN_LEN 2 |
| #define GATT_WRITE_RSP_MIN_LEN 2 |
| #define GATT_INFO_RSP_MIN_LEN 1 |
| #define GATT_MTU_RSP_MIN_LEN 2 |
| #define GATT_READ_BY_TYPE_RSP_MIN_LEN 1 |
| |
| using base::StringPrintf; |
| /******************************************************************************* |
| * G L O B A L G A T T D A T A * |
| ******************************************************************************/ |
| void gatt_send_prepare_write(tGATT_TCB& tcb, tGATT_CLCB* p_clcb); |
| |
| uint8_t disc_type_to_att_opcode[GATT_DISC_MAX] = { |
| 0, |
| GATT_REQ_READ_BY_GRP_TYPE, /* GATT_DISC_SRVC_ALL = 1, */ |
| GATT_REQ_FIND_TYPE_VALUE, /* GATT_DISC_SRVC_BY_UUID, */ |
| GATT_REQ_READ_BY_TYPE, /* GATT_DISC_INC_SRVC, */ |
| GATT_REQ_READ_BY_TYPE, /* GATT_DISC_CHAR, */ |
| GATT_REQ_FIND_INFO /* GATT_DISC_CHAR_DSCPT, */ |
| }; |
| |
| uint16_t disc_type_to_uuid[GATT_DISC_MAX] = { |
| 0, /* reserved */ |
| GATT_UUID_PRI_SERVICE, /* <service> DISC_SRVC_ALL */ |
| GATT_UUID_PRI_SERVICE, /* <service> for DISC_SERVC_BY_UUID */ |
| GATT_UUID_INCLUDE_SERVICE, /* <include_service> for DISC_INC_SRVC */ |
| GATT_UUID_CHAR_DECLARE, /* <characteristic> for DISC_CHAR */ |
| 0 /* no type filtering for DISC_CHAR_DSCPT */ |
| }; |
| |
| /******************************************************************************* |
| * |
| * Function gatt_act_discovery |
| * |
| * Description GATT discovery operation. |
| * |
| * Returns void. |
| * |
| ******************************************************************************/ |
| void gatt_act_discovery(tGATT_CLCB* p_clcb) { |
| uint8_t op_code = disc_type_to_att_opcode[p_clcb->op_subtype]; |
| tGATT_CL_MSG cl_req; |
| tGATT_STATUS st; |
| |
| if (p_clcb->s_handle <= p_clcb->e_handle && p_clcb->s_handle != 0) { |
| memset(&cl_req, 0, sizeof(tGATT_CL_MSG)); |
| |
| cl_req.browse.s_handle = p_clcb->s_handle; |
| cl_req.browse.e_handle = p_clcb->e_handle; |
| |
| if (disc_type_to_uuid[p_clcb->op_subtype] != 0) { |
| cl_req.browse.uuid.len = 2; |
| cl_req.browse.uuid.uu.uuid16 = disc_type_to_uuid[p_clcb->op_subtype]; |
| } |
| |
| if (p_clcb->op_subtype == |
| GATT_DISC_SRVC_BY_UUID) /* fill in the FindByTypeValue request info*/ |
| { |
| cl_req.find_type_value.uuid.len = 2; |
| cl_req.find_type_value.uuid.uu.uuid16 = |
| disc_type_to_uuid[p_clcb->op_subtype]; |
| cl_req.find_type_value.s_handle = p_clcb->s_handle; |
| cl_req.find_type_value.e_handle = p_clcb->e_handle; |
| cl_req.find_type_value.value_len = p_clcb->uuid.len; |
| /* if service type is 32 bits UUID, convert it now */ |
| if (p_clcb->uuid.len == LEN_UUID_32) { |
| cl_req.find_type_value.value_len = LEN_UUID_128; |
| gatt_convert_uuid32_to_uuid128(cl_req.find_type_value.value, |
| p_clcb->uuid.uu.uuid32); |
| } else |
| memcpy(cl_req.find_type_value.value, &p_clcb->uuid.uu, |
| p_clcb->uuid.len); |
| } |
| |
| st = attp_send_cl_msg(*p_clcb->p_tcb, p_clcb, op_code, &cl_req); |
| |
| if (st != GATT_SUCCESS && st != GATT_CMD_STARTED) { |
| gatt_end_operation(p_clcb, GATT_ERROR, NULL); |
| } |
| } else /* end of handle range */ |
| gatt_end_operation(p_clcb, GATT_SUCCESS, NULL); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_act_read |
| * |
| * Description GATT read operation. |
| * |
| * Returns void. |
| * |
| ******************************************************************************/ |
| void gatt_act_read(tGATT_CLCB* p_clcb, uint16_t offset) { |
| tGATT_TCB& tcb = *p_clcb->p_tcb; |
| uint8_t rt = GATT_INTERNAL_ERROR; |
| tGATT_CL_MSG msg; |
| uint8_t op_code = 0; |
| |
| memset(&msg, 0, sizeof(tGATT_CL_MSG)); |
| |
| switch (p_clcb->op_subtype) { |
| case GATT_READ_CHAR_VALUE: |
| case GATT_READ_BY_TYPE: |
| op_code = GATT_REQ_READ_BY_TYPE; |
| msg.browse.s_handle = p_clcb->s_handle; |
| msg.browse.e_handle = p_clcb->e_handle; |
| if (p_clcb->op_subtype == GATT_READ_BY_TYPE) |
| memcpy(&msg.browse.uuid, &p_clcb->uuid, sizeof(tBT_UUID)); |
| else { |
| msg.browse.uuid.len = LEN_UUID_16; |
| msg.browse.uuid.uu.uuid16 = GATT_UUID_CHAR_DECLARE; |
| } |
| break; |
| |
| case GATT_READ_CHAR_VALUE_HDL: |
| case GATT_READ_BY_HANDLE: |
| if (!p_clcb->counter) { |
| op_code = GATT_REQ_READ; |
| msg.handle = p_clcb->s_handle; |
| } else { |
| if (!p_clcb->first_read_blob_after_read) |
| p_clcb->first_read_blob_after_read = true; |
| else |
| p_clcb->first_read_blob_after_read = false; |
| |
| VLOG(1) << __func__ << ": first_read_blob_after_read=" |
| << p_clcb->first_read_blob_after_read; |
| op_code = GATT_REQ_READ_BLOB; |
| msg.read_blob.offset = offset; |
| msg.read_blob.handle = p_clcb->s_handle; |
| } |
| p_clcb->op_subtype &= ~0x80; |
| break; |
| |
| case GATT_READ_PARTIAL: |
| op_code = GATT_REQ_READ_BLOB; |
| msg.read_blob.handle = p_clcb->s_handle; |
| msg.read_blob.offset = offset; |
| break; |
| |
| case GATT_READ_MULTIPLE: |
| op_code = GATT_REQ_READ_MULTI; |
| memcpy(&msg.read_multi, p_clcb->p_attr_buf, sizeof(tGATT_READ_MULTI)); |
| break; |
| |
| case GATT_READ_INC_SRV_UUID128: |
| op_code = GATT_REQ_READ; |
| msg.handle = p_clcb->s_handle; |
| p_clcb->op_subtype &= ~0x90; |
| break; |
| |
| default: |
| LOG(ERROR) << "Unknown read type:" << +p_clcb->op_subtype; |
| break; |
| } |
| |
| if (op_code != 0) rt = attp_send_cl_msg(tcb, p_clcb, op_code, &msg); |
| |
| if (op_code == 0 || (rt != GATT_SUCCESS && rt != GATT_CMD_STARTED)) { |
| gatt_end_operation(p_clcb, rt, NULL); |
| } |
| } |
| |
| /** GATT write operation */ |
| void gatt_act_write(tGATT_CLCB* p_clcb, uint8_t sec_act) { |
| tGATT_TCB& tcb = *p_clcb->p_tcb; |
| |
| CHECK(p_clcb->p_attr_buf); |
| tGATT_VALUE& attr = *((tGATT_VALUE*)p_clcb->p_attr_buf); |
| |
| switch (p_clcb->op_subtype) { |
| case GATT_WRITE_NO_RSP: { |
| p_clcb->s_handle = attr.handle; |
| uint8_t op_code = (sec_act == GATT_SEC_SIGN_DATA) ? GATT_SIGN_CMD_WRITE |
| : GATT_CMD_WRITE; |
| uint8_t rt = gatt_send_write_msg(tcb, p_clcb, op_code, attr.handle, |
| attr.len, 0, attr.value); |
| if (rt != GATT_CMD_STARTED) { |
| if (rt != GATT_SUCCESS) { |
| LOG(ERROR) << StringPrintf( |
| "gatt_act_write() failed op_code=0x%x rt=%d", op_code, rt); |
| } |
| gatt_end_operation(p_clcb, rt, NULL); |
| } |
| return; |
| } |
| |
| case GATT_WRITE: { |
| if (attr.len <= (tcb.payload_size - GATT_HDR_SIZE)) { |
| p_clcb->s_handle = attr.handle; |
| |
| uint8_t rt = gatt_send_write_msg(tcb, p_clcb, GATT_REQ_WRITE, |
| attr.handle, attr.len, 0, attr.value); |
| if (rt != GATT_SUCCESS && rt != GATT_CMD_STARTED && |
| rt != GATT_CONGESTED) { |
| if (rt != GATT_SUCCESS) { |
| LOG(ERROR) << StringPrintf( |
| "gatt_act_write() failed op_code=0x%x rt=%d", GATT_REQ_WRITE, |
| rt); |
| } |
| gatt_end_operation(p_clcb, rt, NULL); |
| } |
| |
| } else { |
| /* prepare write for long attribute */ |
| gatt_send_prepare_write(tcb, p_clcb); |
| } |
| return; |
| } |
| |
| case GATT_WRITE_PREPARE: |
| gatt_send_prepare_write(tcb, p_clcb); |
| return; |
| |
| default: |
| CHECK(false) << "Unknown write type" << p_clcb->op_subtype; |
| return; |
| } |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_send_queue_write_cancel |
| * |
| * Description send queue write cancel |
| * |
| * Returns void. |
| * |
| ******************************************************************************/ |
| void gatt_send_queue_write_cancel(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| tGATT_EXEC_FLAG flag) { |
| uint8_t rt; |
| |
| VLOG(1) << __func__; |
| |
| tGATT_CL_MSG gatt_cl_msg; |
| gatt_cl_msg.exec_write = flag; |
| rt = attp_send_cl_msg(tcb, p_clcb, GATT_REQ_EXEC_WRITE, &gatt_cl_msg); |
| |
| if (rt != GATT_SUCCESS) { |
| gatt_end_operation(p_clcb, rt, NULL); |
| } |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_check_write_long_terminate |
| * |
| * Description To terminate write long or not. |
| * |
| * Returns true: write long is terminated; false keep sending. |
| * |
| ******************************************************************************/ |
| bool gatt_check_write_long_terminate(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| tGATT_VALUE* p_rsp_value) { |
| tGATT_VALUE* p_attr = (tGATT_VALUE*)p_clcb->p_attr_buf; |
| bool exec = false; |
| tGATT_EXEC_FLAG flag = GATT_PREP_WRITE_EXEC; |
| |
| VLOG(1) << __func__; |
| /* check the first write response status */ |
| if (p_rsp_value != NULL) { |
| if (p_rsp_value->handle != p_attr->handle || |
| p_rsp_value->len != p_clcb->counter || |
| memcmp(p_rsp_value->value, p_attr->value + p_attr->offset, |
| p_rsp_value->len)) { |
| /* data does not match */ |
| p_clcb->status = GATT_ERROR; |
| flag = GATT_PREP_WRITE_CANCEL; |
| exec = true; |
| } else /* response checking is good */ |
| { |
| p_clcb->status = GATT_SUCCESS; |
| /* update write offset and check if end of attribute value */ |
| if ((p_attr->offset += p_rsp_value->len) >= p_attr->len) exec = true; |
| } |
| } |
| if (exec) { |
| gatt_send_queue_write_cancel(tcb, p_clcb, flag); |
| return true; |
| } |
| return false; |
| } |
| |
| /** Send prepare write */ |
| void gatt_send_prepare_write(tGATT_TCB& tcb, tGATT_CLCB* p_clcb) { |
| tGATT_VALUE* p_attr = (tGATT_VALUE*)p_clcb->p_attr_buf; |
| uint8_t type = p_clcb->op_subtype; |
| |
| VLOG(1) << __func__ << StringPrintf(" type=0x%x", type); |
| uint16_t to_send = p_attr->len - p_attr->offset; |
| |
| if (to_send > (tcb.payload_size - |
| GATT_WRITE_LONG_HDR_SIZE)) /* 2 = uint16_t offset bytes */ |
| to_send = tcb.payload_size - GATT_WRITE_LONG_HDR_SIZE; |
| |
| p_clcb->s_handle = p_attr->handle; |
| |
| uint16_t offset = p_attr->offset; |
| if (type == GATT_WRITE_PREPARE) { |
| offset += p_clcb->start_offset; |
| } |
| |
| VLOG(1) << StringPrintf("offset =0x%x len=%d", offset, to_send); |
| |
| uint8_t rt = gatt_send_write_msg(tcb, p_clcb, GATT_REQ_PREPARE_WRITE, |
| p_attr->handle, to_send, /* length */ |
| offset, /* used as offset */ |
| p_attr->value + p_attr->offset); /* data */ |
| |
| /* remember the write long attribute length */ |
| p_clcb->counter = to_send; |
| |
| if (rt != GATT_SUCCESS && rt != GATT_CMD_STARTED && rt != GATT_CONGESTED) { |
| gatt_end_operation(p_clcb, rt, NULL); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_process_find_type_value_rsp |
| * |
| * Description This function handles the find by type value response. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_find_type_value_rsp(UNUSED_ATTR tGATT_TCB& tcb, |
| tGATT_CLCB* p_clcb, uint16_t len, |
| uint8_t* p_data) { |
| tGATT_DISC_RES result; |
| uint8_t* p = p_data; |
| |
| VLOG(1) << __func__; |
| /* unexpected response */ |
| if (p_clcb->operation != GATTC_OPTYPE_DISCOVERY || |
| p_clcb->op_subtype != GATT_DISC_SRVC_BY_UUID) |
| return; |
| |
| memset(&result, 0, sizeof(tGATT_DISC_RES)); |
| result.type.len = 2; |
| result.type.uu.uuid16 = GATT_UUID_PRI_SERVICE; |
| |
| /* returns a series of handle ranges */ |
| while (len >= 4) { |
| STREAM_TO_UINT16(result.handle, p); |
| STREAM_TO_UINT16(result.value.group_value.e_handle, p); |
| memcpy(&result.value.group_value.service_type, &p_clcb->uuid, |
| sizeof(tBT_UUID)); |
| |
| len -= 4; |
| |
| if (p_clcb->p_reg->app_cb.p_disc_res_cb) |
| (*p_clcb->p_reg->app_cb.p_disc_res_cb)(p_clcb->conn_id, |
| p_clcb->op_subtype, &result); |
| } |
| |
| /* last handle + 1 */ |
| p_clcb->s_handle = (result.value.group_value.e_handle == 0) |
| ? 0 |
| : (result.value.group_value.e_handle + 1); |
| /* initiate another request */ |
| gatt_act_discovery(p_clcb); |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_process_read_info_rsp |
| * |
| * Description This function is called to handle the read information |
| * response. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_read_info_rsp(UNUSED_ATTR tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| UNUSED_ATTR uint8_t op_code, uint16_t len, |
| uint8_t* p_data) { |
| tGATT_DISC_RES result; |
| uint8_t *p = p_data, uuid_len = 0, type; |
| |
| if (len < GATT_INFO_RSP_MIN_LEN) { |
| LOG(ERROR) << "invalid Info Response PDU received, discard."; |
| gatt_end_operation(p_clcb, GATT_INVALID_PDU, NULL); |
| return; |
| } |
| /* unexpected response */ |
| if (p_clcb->operation != GATTC_OPTYPE_DISCOVERY || |
| p_clcb->op_subtype != GATT_DISC_CHAR_DSCPT) |
| return; |
| |
| STREAM_TO_UINT8(type, p); |
| len -= 1; |
| |
| if (type == GATT_INFO_TYPE_PAIR_16) |
| uuid_len = LEN_UUID_16; |
| else if (type == GATT_INFO_TYPE_PAIR_128) |
| uuid_len = LEN_UUID_128; |
| |
| while (len >= uuid_len + 2) { |
| STREAM_TO_UINT16(result.handle, p); |
| |
| if (uuid_len > 0) { |
| if (!gatt_parse_uuid_from_cmd(&result.type, uuid_len, &p)) break; |
| } else |
| memcpy(&result.type, &p_clcb->uuid, sizeof(tBT_UUID)); |
| |
| len -= (uuid_len + 2); |
| |
| if (p_clcb->p_reg->app_cb.p_disc_res_cb) |
| (*p_clcb->p_reg->app_cb.p_disc_res_cb)(p_clcb->conn_id, |
| p_clcb->op_subtype, &result); |
| } |
| |
| p_clcb->s_handle = (result.handle == 0) ? 0 : (result.handle + 1); |
| /* initiate another request */ |
| gatt_act_discovery(p_clcb); |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_proc_disc_error_rsp |
| * |
| * Description Process the read by type response and send another request |
| * if needed. |
| * |
| * Returns void. |
| * |
| ******************************************************************************/ |
| void gatt_proc_disc_error_rsp(UNUSED_ATTR tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| uint8_t opcode, UNUSED_ATTR uint16_t handle, |
| uint8_t reason) { |
| tGATT_STATUS status = (tGATT_STATUS)reason; |
| |
| VLOG(1) << __func__ |
| << StringPrintf("reason: %02x cmd_code %04x", reason, opcode); |
| |
| switch (opcode) { |
| case GATT_REQ_READ_BY_GRP_TYPE: |
| case GATT_REQ_FIND_TYPE_VALUE: |
| case GATT_REQ_READ_BY_TYPE: |
| case GATT_REQ_FIND_INFO: |
| if (reason == GATT_NOT_FOUND) { |
| status = GATT_SUCCESS; |
| VLOG(1) << "Discovery completed"; |
| } |
| break; |
| default: |
| LOG(ERROR) << StringPrintf("Incorrect discovery opcode %04x", opcode); |
| break; |
| } |
| |
| gatt_end_operation(p_clcb, status, NULL); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_process_error_rsp |
| * |
| * Description This function is called to handle the error response |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_error_rsp(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| UNUSED_ATTR uint8_t op_code, |
| UNUSED_ATTR uint16_t len, uint8_t* p_data) { |
| uint8_t opcode, reason, *p = p_data; |
| uint16_t handle; |
| tGATT_VALUE* p_attr = (tGATT_VALUE*)p_clcb->p_attr_buf; |
| |
| VLOG(1) << __func__; |
| STREAM_TO_UINT8(opcode, p); |
| STREAM_TO_UINT16(handle, p); |
| STREAM_TO_UINT8(reason, p); |
| |
| if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY) { |
| gatt_proc_disc_error_rsp(tcb, p_clcb, opcode, handle, reason); |
| } else { |
| if ((p_clcb->operation == GATTC_OPTYPE_WRITE) && |
| (p_clcb->op_subtype == GATT_WRITE) && |
| (opcode == GATT_REQ_PREPARE_WRITE) && (p_attr) && |
| (handle == p_attr->handle)) { |
| p_clcb->status = reason; |
| gatt_send_queue_write_cancel(tcb, p_clcb, GATT_PREP_WRITE_CANCEL); |
| } else if ((p_clcb->operation == GATTC_OPTYPE_READ) && |
| ((p_clcb->op_subtype == GATT_READ_CHAR_VALUE_HDL) || |
| (p_clcb->op_subtype == GATT_READ_BY_HANDLE)) && |
| (opcode == GATT_REQ_READ_BLOB) && |
| p_clcb->first_read_blob_after_read && |
| (reason == GATT_NOT_LONG)) { |
| gatt_end_operation(p_clcb, GATT_SUCCESS, (void*)p_clcb->p_attr_buf); |
| } else |
| gatt_end_operation(p_clcb, reason, NULL); |
| } |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_process_prep_write_rsp |
| * |
| * Description This function is called to handle the read response |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_prep_write_rsp(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| uint8_t op_code, uint16_t len, |
| uint8_t* p_data) { |
| uint8_t* p = p_data; |
| |
| tGATT_VALUE value = { |
| .conn_id = p_clcb->conn_id, .auth_req = GATT_AUTH_REQ_NONE, |
| }; |
| |
| LOG(ERROR) << StringPrintf("value resp op_code = %s len = %d", |
| gatt_dbg_op_name(op_code), len); |
| |
| if (len < GATT_PREP_WRITE_RSP_MIN_LEN) { |
| LOG(ERROR) << "illegal prepare write response length, discard"; |
| gatt_end_operation(p_clcb, GATT_INVALID_PDU, &value); |
| return; |
| } |
| |
| STREAM_TO_UINT16(value.handle, p); |
| STREAM_TO_UINT16(value.offset, p); |
| |
| value.len = len - 4; |
| |
| memcpy(value.value, p, value.len); |
| |
| if (p_clcb->op_subtype == GATT_WRITE_PREPARE) { |
| p_clcb->status = GATT_SUCCESS; |
| /* application should verify handle offset |
| and value are matched or not */ |
| |
| gatt_end_operation(p_clcb, p_clcb->status, &value); |
| } else if (p_clcb->op_subtype == GATT_WRITE) { |
| if (!gatt_check_write_long_terminate(tcb, p_clcb, &value)) |
| gatt_send_prepare_write(tcb, p_clcb); |
| } |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_process_notification |
| * |
| * Description Handle the handle value indication/notification. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_notification(tGATT_TCB& tcb, uint8_t op_code, uint16_t len, |
| uint8_t* p_data) { |
| tGATT_VALUE value; |
| tGATT_REG* p_reg; |
| uint16_t conn_id; |
| tGATT_STATUS encrypt_status; |
| uint8_t *p = p_data, i, event = (op_code == GATT_HANDLE_VALUE_NOTIF) |
| ? GATTC_OPTYPE_NOTIFICATION |
| : GATTC_OPTYPE_INDICATION; |
| |
| VLOG(1) << __func__; |
| |
| if (len < GATT_NOTIFICATION_MIN_LEN) { |
| LOG(ERROR) << "illegal notification PDU length, discard"; |
| return; |
| } |
| |
| memset(&value, 0, sizeof(value)); |
| STREAM_TO_UINT16(value.handle, p); |
| value.len = len - 2; |
| memcpy(value.value, p, value.len); |
| |
| if (!GATT_HANDLE_IS_VALID(value.handle)) { |
| /* illegal handle, send ack now */ |
| if (op_code == GATT_HANDLE_VALUE_IND) |
| attp_send_cl_msg(tcb, nullptr, GATT_HANDLE_VALUE_CONF, NULL); |
| return; |
| } |
| |
| if (event == GATTC_OPTYPE_INDICATION) { |
| if (tcb.ind_count) { |
| /* this is an error case that receiving an indication but we |
| still has an indication not being acked yet. |
| For now, just log the error reset the counter. |
| Later we need to disconnect the link unconditionally. |
| */ |
| LOG(ERROR) << __func__ << " rcv Ind. but ind_count=" << tcb.ind_count |
| << " (will reset ind_count)"; |
| } |
| tcb.ind_count = 0; |
| } |
| |
| /* should notify all registered client with the handle value |
| notificaion/indication |
| Note: need to do the indication count and start timer first then do |
| callback |
| */ |
| |
| for (i = 0, p_reg = gatt_cb.cl_rcb; i < GATT_MAX_APPS; i++, p_reg++) { |
| if (p_reg->in_use && p_reg->app_cb.p_cmpl_cb && |
| (event == GATTC_OPTYPE_INDICATION)) |
| tcb.ind_count++; |
| } |
| |
| if (event == GATTC_OPTYPE_INDICATION) { |
| /* start a timer for app confirmation */ |
| if (tcb.ind_count > 0) |
| gatt_start_ind_ack_timer(tcb); |
| else /* no app to indicate, or invalid handle */ |
| attp_send_cl_msg(tcb, nullptr, GATT_HANDLE_VALUE_CONF, NULL); |
| } |
| |
| encrypt_status = gatt_get_link_encrypt_status(tcb); |
| tGATT_CL_COMPLETE gatt_cl_complete; |
| gatt_cl_complete.att_value = value; |
| for (i = 0, p_reg = gatt_cb.cl_rcb; i < GATT_MAX_APPS; i++, p_reg++) { |
| if (p_reg->in_use && p_reg->app_cb.p_cmpl_cb) { |
| conn_id = GATT_CREATE_CONN_ID(tcb.tcb_idx, p_reg->gatt_if); |
| (*p_reg->app_cb.p_cmpl_cb)(conn_id, event, encrypt_status, |
| &gatt_cl_complete); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_process_read_by_type_rsp |
| * |
| * Description This function is called to handle the read by type response. |
| * read by type can be used for discovery, or read by type or |
| * read characteristic value. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_read_by_type_rsp(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| uint8_t op_code, uint16_t len, |
| uint8_t* p_data) { |
| tGATT_DISC_RES result; |
| tGATT_DISC_VALUE record_value; |
| uint8_t *p = p_data, value_len, handle_len = 2; |
| uint16_t handle = 0; |
| |
| /* discovery procedure and no callback function registered */ |
| if (((!p_clcb->p_reg) || (!p_clcb->p_reg->app_cb.p_disc_res_cb)) && |
| (p_clcb->operation == GATTC_OPTYPE_DISCOVERY)) |
| return; |
| |
| if (len < GATT_READ_BY_TYPE_RSP_MIN_LEN) { |
| LOG(ERROR) << "Illegal ReadByType/ReadByGroupType Response length, discard"; |
| gatt_end_operation(p_clcb, GATT_INVALID_PDU, NULL); |
| return; |
| } |
| |
| STREAM_TO_UINT8(value_len, p); |
| |
| if ((value_len > (tcb.payload_size - 2)) || (value_len > (len - 1))) { |
| /* this is an error case that server's response containing a value length |
| which is larger than MTU-2 |
| or value_len > message total length -1 */ |
| LOG(ERROR) << __func__ |
| << StringPrintf( |
| ": Discard response op_code=%d " |
| "vale_len=%d > (MTU-2=%d or msg_len-1=%d)", |
| op_code, value_len, (tcb.payload_size - 2), (len - 1)); |
| gatt_end_operation(p_clcb, GATT_ERROR, NULL); |
| return; |
| } |
| |
| if (op_code == GATT_RSP_READ_BY_GRP_TYPE) handle_len = 4; |
| |
| value_len -= handle_len; /* substract the handle pairs bytes */ |
| len -= 1; |
| |
| while (len >= (handle_len + value_len)) { |
| STREAM_TO_UINT16(handle, p); |
| |
| if (!GATT_HANDLE_IS_VALID(handle)) { |
| gatt_end_operation(p_clcb, GATT_INVALID_HANDLE, NULL); |
| return; |
| } |
| |
| memset(&result, 0, sizeof(tGATT_DISC_RES)); |
| memset(&record_value, 0, sizeof(tGATT_DISC_VALUE)); |
| |
| result.handle = handle; |
| result.type.len = 2; |
| result.type.uu.uuid16 = disc_type_to_uuid[p_clcb->op_subtype]; |
| |
| /* discover all services */ |
| if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY && |
| p_clcb->op_subtype == GATT_DISC_SRVC_ALL && |
| op_code == GATT_RSP_READ_BY_GRP_TYPE) { |
| STREAM_TO_UINT16(handle, p); |
| |
| if (!GATT_HANDLE_IS_VALID(handle)) { |
| gatt_end_operation(p_clcb, GATT_INVALID_HANDLE, NULL); |
| return; |
| } else { |
| record_value.group_value.e_handle = handle; |
| if (!gatt_parse_uuid_from_cmd(&record_value.group_value.service_type, |
| value_len, &p)) { |
| LOG(ERROR) << "discover all service response parsing failure"; |
| break; |
| } |
| } |
| } |
| /* discover included service */ |
| else if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY && |
| p_clcb->op_subtype == GATT_DISC_INC_SRVC) { |
| STREAM_TO_UINT16(record_value.incl_service.s_handle, p); |
| STREAM_TO_UINT16(record_value.incl_service.e_handle, p); |
| |
| if (!GATT_HANDLE_IS_VALID(record_value.incl_service.s_handle) || |
| !GATT_HANDLE_IS_VALID(record_value.incl_service.e_handle)) { |
| gatt_end_operation(p_clcb, GATT_INVALID_HANDLE, NULL); |
| return; |
| } |
| |
| if (value_len == 6) { |
| STREAM_TO_UINT16(record_value.incl_service.service_type.uu.uuid16, p); |
| record_value.incl_service.service_type.len = LEN_UUID_16; |
| } else if (value_len == 4) { |
| p_clcb->s_handle = record_value.incl_service.s_handle; |
| p_clcb->read_uuid128.wait_for_read_rsp = true; |
| p_clcb->read_uuid128.next_disc_start_hdl = handle + 1; |
| memcpy(&p_clcb->read_uuid128.result, &result, sizeof(result)); |
| memcpy(&p_clcb->read_uuid128.result.value, &record_value, |
| sizeof(result.value)); |
| p_clcb->op_subtype |= 0x90; |
| gatt_act_read(p_clcb, 0); |
| return; |
| } else { |
| LOG(ERROR) << __func__ |
| << ": INCL_SRVC failed with invalid data value_len=" |
| << +value_len; |
| gatt_end_operation(p_clcb, GATT_INVALID_PDU, (void*)p); |
| return; |
| } |
| } |
| /* read by type */ |
| else if (p_clcb->operation == GATTC_OPTYPE_READ && |
| p_clcb->op_subtype == GATT_READ_BY_TYPE) { |
| p_clcb->counter = len - 2; |
| p_clcb->s_handle = handle; |
| if (p_clcb->counter == (p_clcb->p_tcb->payload_size - 4)) { |
| p_clcb->op_subtype = GATT_READ_BY_HANDLE; |
| if (!p_clcb->p_attr_buf) |
| p_clcb->p_attr_buf = (uint8_t*)osi_malloc(GATT_MAX_ATTR_LEN); |
| if (p_clcb->counter <= GATT_MAX_ATTR_LEN) { |
| memcpy(p_clcb->p_attr_buf, p, p_clcb->counter); |
| gatt_act_read(p_clcb, p_clcb->counter); |
| } else { |
| gatt_end_operation(p_clcb, GATT_INTERNAL_ERROR, (void*)p); |
| } |
| } else { |
| gatt_end_operation(p_clcb, GATT_SUCCESS, (void*)p); |
| } |
| return; |
| } else /* discover characterisitic */ |
| { |
| STREAM_TO_UINT8(record_value.dclr_value.char_prop, p); |
| STREAM_TO_UINT16(record_value.dclr_value.val_handle, p); |
| if (!GATT_HANDLE_IS_VALID(record_value.dclr_value.val_handle)) { |
| gatt_end_operation(p_clcb, GATT_INVALID_HANDLE, NULL); |
| return; |
| } |
| if (!gatt_parse_uuid_from_cmd(&record_value.dclr_value.char_uuid, |
| (uint16_t)(value_len - 3), &p)) { |
| gatt_end_operation(p_clcb, GATT_SUCCESS, NULL); |
| /* invalid format, and skip the result */ |
| return; |
| } |
| |
| /* UUID not matching */ |
| if (!gatt_uuid_compare(record_value.dclr_value.char_uuid, p_clcb->uuid)) { |
| len -= (value_len + 2); |
| continue; /* skip the result, and look for next one */ |
| } else if (p_clcb->operation == GATTC_OPTYPE_READ) |
| /* UUID match for read characteristic value */ |
| { |
| /* only read the first matching UUID characteristic value, and |
| discard the rest results */ |
| p_clcb->s_handle = record_value.dclr_value.val_handle; |
| p_clcb->op_subtype |= 0x80; |
| gatt_act_read(p_clcb, 0); |
| return; |
| } |
| } |
| len -= (value_len + handle_len); |
| |
| /* result is (handle, 16bits UUID) pairs */ |
| memcpy(&result.value, &record_value, sizeof(result.value)); |
| |
| /* send callback if is discover procedure */ |
| if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY && |
| p_clcb->p_reg->app_cb.p_disc_res_cb) |
| (*p_clcb->p_reg->app_cb.p_disc_res_cb)(p_clcb->conn_id, |
| p_clcb->op_subtype, &result); |
| } |
| |
| p_clcb->s_handle = (handle == 0) ? 0 : (handle + 1); |
| |
| if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY) { |
| /* initiate another request */ |
| gatt_act_discovery(p_clcb); |
| } else /* read characteristic value */ |
| { |
| gatt_act_read(p_clcb, 0); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_process_read_rsp |
| * |
| * Description This function is called to handle the read BLOB response |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_read_rsp(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, |
| UNUSED_ATTR uint8_t op_code, uint16_t len, |
| uint8_t* p_data) { |
| uint16_t offset = p_clcb->counter; |
| uint8_t* p = p_data; |
| |
| if (p_clcb->operation == GATTC_OPTYPE_READ) { |
| if (p_clcb->op_subtype != GATT_READ_BY_HANDLE) { |
| p_clcb->counter = len; |
| gatt_end_operation(p_clcb, GATT_SUCCESS, (void*)p); |
| } else { |
| /* allocate GKI buffer holding up long attribute value */ |
| if (!p_clcb->p_attr_buf) |
| p_clcb->p_attr_buf = (uint8_t*)osi_malloc(GATT_MAX_ATTR_LEN); |
| |
| /* copy attrobute value into cb buffer */ |
| if (offset < GATT_MAX_ATTR_LEN) { |
| if ((len + offset) > GATT_MAX_ATTR_LEN) |
| len = GATT_MAX_ATTR_LEN - offset; |
| |
| p_clcb->counter += len; |
| |
| memcpy(p_clcb->p_attr_buf + offset, p, len); |
| |
| /* send next request if needed */ |
| |
| if (len == (tcb.payload_size - |
| 1) && /* full packet for read or read blob rsp */ |
| len + offset < GATT_MAX_ATTR_LEN) { |
| VLOG(1) << StringPrintf( |
| "full pkt issue read blob for remianing bytes old offset=%d " |
| "len=%d new offset=%d", |
| offset, len, p_clcb->counter); |
| gatt_act_read(p_clcb, p_clcb->counter); |
| } else /* end of request, send callback */ |
| { |
| gatt_end_operation(p_clcb, GATT_SUCCESS, (void*)p_clcb->p_attr_buf); |
| } |
| } else /* exception, should not happen */ |
| { |
| LOG(ERROR) << "attr offset = " << +offset |
| << " p_attr_buf = " << p_clcb->p_attr_buf; |
| gatt_end_operation(p_clcb, GATT_NO_RESOURCES, |
| (void*)p_clcb->p_attr_buf); |
| } |
| } |
| } else { |
| if (p_clcb->operation == GATTC_OPTYPE_DISCOVERY && |
| p_clcb->op_subtype == GATT_DISC_INC_SRVC && |
| p_clcb->read_uuid128.wait_for_read_rsp) { |
| p_clcb->s_handle = p_clcb->read_uuid128.next_disc_start_hdl; |
| p_clcb->read_uuid128.wait_for_read_rsp = false; |
| if (len == LEN_UUID_128) { |
| memcpy(p_clcb->read_uuid128.result.value.incl_service.service_type.uu |
| .uuid128, |
| p, len); |
| p_clcb->read_uuid128.result.value.incl_service.service_type.len = |
| LEN_UUID_128; |
| if (p_clcb->p_reg->app_cb.p_disc_res_cb) |
| (*p_clcb->p_reg->app_cb.p_disc_res_cb)(p_clcb->conn_id, |
| p_clcb->op_subtype, |
| &p_clcb->read_uuid128.result); |
| gatt_act_discovery(p_clcb); |
| } else { |
| gatt_end_operation(p_clcb, GATT_INVALID_PDU, (void*)p); |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_process_handle_rsp |
| * |
| * Description This function is called to handle the write response |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_handle_rsp(tGATT_CLCB* p_clcb) { |
| gatt_end_operation(p_clcb, GATT_SUCCESS, NULL); |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_process_mtu_rsp |
| * |
| * Description Process the configure MTU response. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void gatt_process_mtu_rsp(tGATT_TCB& tcb, tGATT_CLCB* p_clcb, uint16_t len, |
| uint8_t* p_data) { |
| uint16_t mtu; |
| tGATT_STATUS status = GATT_SUCCESS; |
| |
| if (len < GATT_MTU_RSP_MIN_LEN) { |
| LOG(ERROR) << "invalid MTU response PDU received, discard."; |
| status = GATT_INVALID_PDU; |
| } else { |
| STREAM_TO_UINT16(mtu, p_data); |
| |
| if (mtu < tcb.payload_size && mtu >= GATT_DEF_BLE_MTU_SIZE) |
| tcb.payload_size = mtu; |
| } |
| |
| l2cble_set_fixed_channel_tx_data_length(tcb.peer_bda, L2CAP_ATT_CID, |
| tcb.payload_size); |
| gatt_end_operation(p_clcb, status, NULL); |
| } |
| /******************************************************************************* |
| * |
| * Function gatt_cmd_to_rsp_code |
| * |
| * Description Convert an ATT command op code into the corresponding |
| * response code assume no error occurs. |
| * |
| * Returns response code. |
| * |
| ******************************************************************************/ |
| uint8_t gatt_cmd_to_rsp_code(uint8_t cmd_code) { |
| uint8_t rsp_code = 0; |
| |
| if (cmd_code > 1 && cmd_code != GATT_CMD_WRITE) { |
| rsp_code = cmd_code + 1; |
| } |
| return rsp_code; |
| } |
| |
| /** Find next command in queue and sent to server */ |
| bool gatt_cl_send_next_cmd_inq(tGATT_TCB& tcb) { |
| while (!tcb.cl_cmd_q.empty()) { |
| tGATT_CMD_Q& cmd = tcb.cl_cmd_q.front(); |
| if (!cmd.to_send || cmd.p_cmd == NULL) return false; |
| |
| tGATT_STATUS att_ret = attp_send_msg_to_l2cap(tcb, cmd.p_cmd); |
| if (att_ret != GATT_SUCCESS && att_ret != GATT_CONGESTED) { |
| LOG(ERROR) << __func__ << ": L2CAP sent error"; |
| tcb.cl_cmd_q.pop(); |
| continue; |
| } |
| |
| cmd.to_send = false; |
| cmd.p_cmd = NULL; |
| |
| if (cmd.op_code == GATT_CMD_WRITE || cmd.op_code == GATT_SIGN_CMD_WRITE) { |
| /* dequeue the request if is write command or sign write */ |
| uint8_t rsp_code; |
| tGATT_CLCB* p_clcb = gatt_cmd_dequeue(tcb, &rsp_code); |
| |
| /* send command complete callback here */ |
| gatt_end_operation(p_clcb, att_ret, NULL); |
| |
| /* if no ack needed, keep sending */ |
| if (att_ret == GATT_SUCCESS) continue; |
| |
| return true; |
| } |
| |
| gatt_start_rsp_timer(cmd.p_clcb); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** This function is called to handle the server response to client */ |
| void gatt_client_handle_server_rsp(tGATT_TCB& tcb, uint8_t op_code, |
| uint16_t len, uint8_t* p_data) { |
| if (op_code == GATT_HANDLE_VALUE_IND || op_code == GATT_HANDLE_VALUE_NOTIF) { |
| if (len >= tcb.payload_size) { |
| LOG(ERROR) << StringPrintf( |
| "%s: invalid indicate pkt size: %d, PDU size: %d", __func__, len + 1, |
| tcb.payload_size); |
| return; |
| } |
| |
| gatt_process_notification(tcb, op_code, len, p_data); |
| return; |
| } |
| |
| uint8_t cmd_code = 0; |
| tGATT_CLCB* p_clcb = gatt_cmd_dequeue(tcb, &cmd_code); |
| uint8_t rsp_code = gatt_cmd_to_rsp_code(cmd_code); |
| if (!p_clcb || (rsp_code != op_code && op_code != GATT_RSP_ERROR)) { |
| LOG(WARNING) << StringPrintf( |
| "ATT - Ignore wrong response. Receives (%02x) Request(%02x) Ignored", |
| op_code, rsp_code); |
| return; |
| } |
| |
| if (!p_clcb->in_use) { |
| LOG(WARNING) << "ATT - clcb already not in use, ignoring response"; |
| gatt_cl_send_next_cmd_inq(tcb); |
| return; |
| } |
| |
| alarm_cancel(p_clcb->gatt_rsp_timer_ent); |
| p_clcb->retry_count = 0; |
| |
| /* the size of the message may not be bigger than the local max PDU size*/ |
| /* The message has to be smaller than the agreed MTU, len does not count |
| * op_code */ |
| if (len >= tcb.payload_size) { |
| LOG(ERROR) << StringPrintf( |
| "%s: invalid response pkt size: %d, PDU size: %d", __func__, len + 1, |
| tcb.payload_size); |
| gatt_end_operation(p_clcb, GATT_ERROR, NULL); |
| } else { |
| switch (op_code) { |
| case GATT_RSP_ERROR: |
| gatt_process_error_rsp(tcb, p_clcb, op_code, len, p_data); |
| break; |
| |
| case GATT_RSP_MTU: /* 2 bytes mtu */ |
| gatt_process_mtu_rsp(tcb, p_clcb, len, p_data); |
| break; |
| |
| case GATT_RSP_FIND_INFO: |
| gatt_process_read_info_rsp(tcb, p_clcb, op_code, len, p_data); |
| break; |
| |
| case GATT_RSP_READ_BY_TYPE: |
| case GATT_RSP_READ_BY_GRP_TYPE: |
| gatt_process_read_by_type_rsp(tcb, p_clcb, op_code, len, p_data); |
| break; |
| |
| case GATT_RSP_READ: |
| case GATT_RSP_READ_BLOB: |
| case GATT_RSP_READ_MULTI: |
| gatt_process_read_rsp(tcb, p_clcb, op_code, len, p_data); |
| break; |
| |
| case GATT_RSP_FIND_TYPE_VALUE: /* disc service with UUID */ |
| gatt_process_find_type_value_rsp(tcb, p_clcb, len, p_data); |
| break; |
| |
| case GATT_RSP_WRITE: |
| gatt_process_handle_rsp(p_clcb); |
| break; |
| |
| case GATT_RSP_PREPARE_WRITE: |
| gatt_process_prep_write_rsp(tcb, p_clcb, op_code, len, p_data); |
| break; |
| |
| case GATT_RSP_EXEC_WRITE: |
| gatt_end_operation(p_clcb, p_clcb->status, NULL); |
| break; |
| |
| default: |
| LOG(ERROR) << __func__ << ": Unknown opcode = " << std::hex << op_code; |
| break; |
| } |
| } |
| |
| gatt_cl_send_next_cmd_inq(tcb); |
| } |
