1 /****************************************************************************** 2 * 3 * Copyright (C) 1999-2012 Broadcom Corporation 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 /****************************************************************************** 20 * 21 * This file contains functions for the SMP L2Cap interface 22 * 23 ******************************************************************************/ 24 25 #include "bt_target.h" 26 27 #if SMP_INCLUDED == TRUE 28 29 #include <string.h> 30 #include "btm_ble_api.h" 31 #include "l2c_api.h" 32 33 #include "smp_int.h" 34 35 36 37 static void smp_connect_cback (BD_ADDR bd_addr, BOOLEAN connected, UINT16 reason); 38 static void smp_data_ind (BD_ADDR bd_addr, BT_HDR *p_buf); 39 40 /******************************************************************************* 41 ** 42 ** Function smp_l2cap_if_init 43 ** 44 ** Description This function is called during the SMP task startup 45 ** to register interface functions with L2CAP. 46 ** 47 *******************************************************************************/ 48 void smp_l2cap_if_init (void) 49 { 50 tL2CAP_FIXED_CHNL_REG fixed_reg; 51 SMP_TRACE_EVENT0 ("SMDBG l2c smp_l2cap_if_init"); 52 fixed_reg.fixed_chnl_opts.mode = L2CAP_FCR_BASIC_MODE; 53 fixed_reg.fixed_chnl_opts.max_transmit = 0; 54 fixed_reg.fixed_chnl_opts.rtrans_tout = 0; 55 fixed_reg.fixed_chnl_opts.mon_tout = 0; 56 fixed_reg.fixed_chnl_opts.mps = 0; 57 fixed_reg.fixed_chnl_opts.tx_win_sz = 0; 58 59 fixed_reg.pL2CA_FixedConn_Cb = smp_connect_cback; 60 fixed_reg.pL2CA_FixedData_Cb = smp_data_ind; 61 fixed_reg.default_idle_tout = 60; /* set 60 seconds timeout, 0xffff default idle timeout */ 62 63 /* Now, register with L2CAP */ 64 L2CA_RegisterFixedChannel (L2CAP_SMP_CID, &fixed_reg); 65 } 66 67 /******************************************************************************* 68 ** 69 ** Function smp_connect_cback 70 ** 71 ** Description This callback function is called by L2CAP to indicate that 72 ** SMP channel is 73 ** connected (conn = TRUE)/disconnected (conn = FALSE). 74 ** 75 *******************************************************************************/ 76 static void smp_connect_cback (BD_ADDR bd_addr, BOOLEAN connected, UINT16 reason) 77 { 78 tSMP_CB *p_cb = &smp_cb; 79 tSMP_INT_DATA int_data; 80 81 SMP_TRACE_EVENT0 ("SMDBG l2c smp_connect_cback "); 82 83 if (memcmp(bd_addr, p_cb->pairing_bda, BD_ADDR_LEN) == 0) 84 { 85 SMP_TRACE_EVENT3 ("smp_connect_cback() for pairing BDA: %08x%04x Event: %s", 86 (bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8) + bd_addr[3], 87 (bd_addr[4]<<8)+bd_addr[5], (connected) ? "connected" : "disconnected"); 88 89 if (connected) 90 { 91 if(!p_cb->connect_initialized) 92 { 93 p_cb->connect_initialized = TRUE; 94 /* initiating connection established */ 95 p_cb->role = L2CA_GetBleConnRole(bd_addr); 96 97 /* initialize local i/r key to be default keys */ 98 p_cb->loc_r_key = p_cb->loc_i_key = SMP_SEC_DEFAULT_KEY; 99 p_cb->loc_auth_req = p_cb->peer_auth_req = SMP_DEFAULT_AUTH_REQ; 100 p_cb->cb_evt = SMP_IO_CAP_REQ_EVT; 101 smp_sm_event(p_cb, SMP_L2CAP_CONN_EVT, NULL); 102 } 103 } 104 else 105 { 106 int_data.reason = reason; 107 /* Disconnected while doing security */ 108 smp_sm_event(p_cb, SMP_L2CAP_DISCONN_EVT, &int_data); 109 } 110 } 111 } 112 113 /******************************************************************************* 114 ** 115 ** Function smp_data_ind 116 ** 117 ** Description This function is called when data is received from L2CAP on 118 ** SMP channel. 119 ** 120 ** 121 ** Returns void 122 ** 123 *******************************************************************************/ 124 static void smp_data_ind (BD_ADDR bd_addr, BT_HDR *p_buf) 125 { 126 tSMP_CB *p_cb = &smp_cb; 127 UINT8 *p = (UINT8 *)(p_buf + 1) + p_buf->offset; 128 UINT8 cmd ; 129 SMP_TRACE_EVENT0 ("SMDBG l2c smp_data_ind"); 130 131 SMP_TRACE_EVENT0 ("Got smp_data_ind"); 132 133 STREAM_TO_UINT8(cmd, p); 134 135 136 /* reject the pairing request if there is an on-going SMP pairing */ 137 if (SMP_OPCODE_PAIRING_REQ == cmd || SMP_OPCODE_SEC_REQ == cmd) 138 { 139 if (p_cb->state == SMP_ST_IDLE) 140 { 141 p_cb->role = L2CA_GetBleConnRole(bd_addr); 142 memcpy(&p_cb->pairing_bda[0], bd_addr, BD_ADDR_LEN); 143 } 144 else if (memcmp(&bd_addr[0], p_cb->pairing_bda, BD_ADDR_LEN)) 145 { 146 p_cb->failure = SMP_PAIR_NOT_SUPPORT; 147 smp_send_cmd(SMP_OPCODE_PAIRING_FAILED, p_cb); 148 } 149 } 150 151 if (memcmp(&bd_addr[0], p_cb->pairing_bda, BD_ADDR_LEN) == 0) 152 { 153 btu_stop_timer (&p_cb->rsp_timer_ent); 154 smp_sm_event(p_cb, cmd, p); 155 } 156 157 GKI_freebuf (p_buf); 158 } 159 #endif 160
