336 lines
13 KiB
C
336 lines
13 KiB
C
/******************************************************************************
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*
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* Copyright (C) 1999-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* This file contains functions for the SMP L2Cap interface
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*
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******************************************************************************/
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#include "common/bt_target.h"
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#include "osi/allocator.h"
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#if SMP_INCLUDED == TRUE
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#include <string.h>
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#include "stack/btm_ble_api.h"
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#include "stack/l2c_api.h"
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#include "smp_int.h"
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static void smp_tx_complete_callback(UINT16 cid, UINT16 num_pkt);
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static void smp_connect_callback(UINT16 channel, BD_ADDR bd_addr, BOOLEAN connected, UINT16 reason,
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tBT_TRANSPORT transport);
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static void smp_data_received(UINT16 channel, BD_ADDR bd_addr, BT_HDR *p_buf);
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#if (CLASSIC_BT_INCLUDED == TRUE)
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static void smp_br_connect_callback(UINT16 channel, BD_ADDR bd_addr, BOOLEAN connected, UINT16 reason,
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tBT_TRANSPORT transport);
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static void smp_br_data_received(UINT16 channel, BD_ADDR bd_addr, BT_HDR *p_buf);
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#endif ///CLASSIC_BT_INCLUDED == TRUE
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/*******************************************************************************
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**
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** Function smp_l2cap_if_init
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**
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** Description This function is called during the SMP task startup
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** to register interface functions with L2CAP.
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**
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*******************************************************************************/
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void smp_l2cap_if_init (void)
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{
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tL2CAP_FIXED_CHNL_REG fixed_reg;
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SMP_TRACE_EVENT ("SMDBG l2c %s", __func__);
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fixed_reg.fixed_chnl_opts.mode = L2CAP_FCR_BASIC_MODE;
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fixed_reg.fixed_chnl_opts.max_transmit = 0;
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fixed_reg.fixed_chnl_opts.rtrans_tout = 0;
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fixed_reg.fixed_chnl_opts.mon_tout = 0;
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fixed_reg.fixed_chnl_opts.mps = 0;
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fixed_reg.fixed_chnl_opts.tx_win_sz = 0;
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fixed_reg.pL2CA_FixedConn_Cb = smp_connect_callback;
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fixed_reg.pL2CA_FixedData_Cb = smp_data_received;
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fixed_reg.pL2CA_FixedTxComplete_Cb = smp_tx_complete_callback;
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fixed_reg.pL2CA_FixedCong_Cb = NULL; /* do not handle congestion on this channel */
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fixed_reg.default_idle_tout = 0; /* set 0 seconds timeout, 0xffff default idle timeout.
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This timeout is used to wait for the end of the pairing
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and then make a disconnect request, setting a larger value
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will cause the disconnect event to go back up for a long time.
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Set to 0 will be disconnected directly, and it will come up
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pairing failure, so it will not cause adverse effects. */
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L2CA_RegisterFixedChannel (L2CAP_SMP_CID, &fixed_reg);
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#if (CLASSIC_BT_INCLUDED == TRUE)
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fixed_reg.pL2CA_FixedConn_Cb = smp_br_connect_callback;
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fixed_reg.pL2CA_FixedData_Cb = smp_br_data_received;
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L2CA_RegisterFixedChannel (L2CAP_SMP_BR_CID, &fixed_reg);
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#endif ///CLASSIC_BT_INCLUDED == TRUE
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}
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/*******************************************************************************
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**
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** Function smp_connect_callback
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**
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** Description This callback function is called by L2CAP to indicate that
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** SMP channel is
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** connected (conn = TRUE)/disconnected (conn = FALSE).
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**
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*******************************************************************************/
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static void smp_connect_callback (UINT16 channel, BD_ADDR bd_addr, BOOLEAN connected, UINT16 reason,
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tBT_TRANSPORT transport)
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{
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tSMP_CB *p_cb = &smp_cb;
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tSMP_INT_DATA int_data;
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BD_ADDR dummy_bda = {0};
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SMP_TRACE_EVENT ("SMDBG l2c %s\n", __FUNCTION__);
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if (transport == BT_TRANSPORT_BR_EDR || memcmp(bd_addr, dummy_bda, BD_ADDR_LEN) == 0) {
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return;
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}
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if(!connected && &p_cb->rsp_timer_ent) {
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//free timer
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btu_free_timer(&p_cb->rsp_timer_ent);
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}
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if (memcmp(bd_addr, p_cb->pairing_bda, BD_ADDR_LEN) == 0) {
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SMP_TRACE_EVENT ("%s() for pairing BDA: %08x%04x Event: %s\n",
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__FUNCTION__,
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(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
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(bd_addr[4] << 8) + bd_addr[5],
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(connected) ? "connected" : "disconnected");
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if (connected) {
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if (!p_cb->connect_initialized) {
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p_cb->connect_initialized = TRUE;
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/* initiating connection established */
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p_cb->role = L2CA_GetBleConnRole(bd_addr);
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/* initialize local i/r key to be default keys */
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p_cb->local_r_key = p_cb->local_i_key = SMP_SEC_DEFAULT_KEY;
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p_cb->loc_auth_req = p_cb->peer_auth_req = SMP_DEFAULT_AUTH_REQ;
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p_cb->cb_evt = SMP_IO_CAP_REQ_EVT;
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smp_sm_event(p_cb, SMP_L2CAP_CONN_EVT, NULL);
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}
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} else {
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int_data.reason = reason;
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/* Disconnected while doing security */
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smp_sm_event(p_cb, SMP_L2CAP_DISCONN_EVT, &int_data);
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}
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}
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}
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/*******************************************************************************
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**
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** Function smp_data_received
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**
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** Description This function is called when data is received from L2CAP on
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** SMP channel.
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**
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**
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** Returns void
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**
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*******************************************************************************/
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static void smp_data_received(UINT16 channel, BD_ADDR bd_addr, BT_HDR *p_buf)
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{
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tSMP_CB *p_cb = &smp_cb;
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UINT8 *p = (UINT8 *)(p_buf + 1) + p_buf->offset;
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UINT8 cmd ;
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SMP_TRACE_EVENT ("\nSMDBG l2c %s\n", __FUNCTION__);
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STREAM_TO_UINT8(cmd, p);
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/* sanity check */
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if ((SMP_OPCODE_MAX < cmd) || (SMP_OPCODE_MIN > cmd)) {
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SMP_TRACE_WARNING( "Ignore received command with RESERVED code 0x%02x\n", cmd);
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osi_free (p_buf);
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return;
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}
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/* reject the pairing request if there is an on-going SMP pairing */
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if (SMP_OPCODE_PAIRING_REQ == cmd || SMP_OPCODE_SEC_REQ == cmd) {
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if ((p_cb->state == SMP_STATE_IDLE) && (p_cb->br_state == SMP_BR_STATE_IDLE) &&
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!(p_cb->flags & SMP_PAIR_FLAGS_WE_STARTED_DD)) {
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p_cb->role = L2CA_GetBleConnRole(bd_addr);
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memcpy(&p_cb->pairing_bda[0], bd_addr, BD_ADDR_LEN);
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} else if (memcmp(&bd_addr[0], p_cb->pairing_bda, BD_ADDR_LEN)) {
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osi_free (p_buf);
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smp_reject_unexpected_pairing_command(bd_addr);
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return;
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}
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/* else, out of state pairing request/security request received, passed into SM */
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}
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if (memcmp(&bd_addr[0], p_cb->pairing_bda, BD_ADDR_LEN) == 0) {
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btu_stop_timer (&p_cb->rsp_timer_ent);
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btu_start_timer (&p_cb->rsp_timer_ent, BTU_TTYPE_SMP_PAIRING_CMD,
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SMP_WAIT_FOR_RSP_TOUT);
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if (cmd == SMP_OPCODE_CONFIRM) {
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SMP_TRACE_DEBUG ("in %s cmd = 0x%02x, peer_auth_req = 0x%02x,"
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"loc_auth_req = 0x%02x\n",
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__FUNCTION__, cmd, p_cb->peer_auth_req, p_cb->loc_auth_req);
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if ((p_cb->peer_auth_req & SMP_SC_SUPPORT_BIT) &&
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(p_cb->loc_auth_req & SMP_SC_SUPPORT_BIT)) {
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cmd = SMP_OPCODE_PAIR_COMMITM;
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}
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}
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p_cb->rcvd_cmd_code = cmd;
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p_cb->rcvd_cmd_len = (UINT8) p_buf->len;
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smp_sm_event(p_cb, cmd, p);
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}
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osi_free (p_buf);
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}
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/*******************************************************************************
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**
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** Function smp_tx_complete_callback
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**
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** Description SMP channel tx complete callback
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**
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*******************************************************************************/
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static void smp_tx_complete_callback (UINT16 cid, UINT16 num_pkt)
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{
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tSMP_CB *p_cb = &smp_cb;
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if (p_cb->total_tx_unacked >= num_pkt) {
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p_cb->total_tx_unacked -= num_pkt;
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} else {
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SMP_TRACE_ERROR("Unexpected %s: num_pkt = %d", __func__, num_pkt);
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}
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UINT8 reason = SMP_SUCCESS;
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if (p_cb->total_tx_unacked == 0 && p_cb->wait_for_authorization_complete) {
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if (cid == L2CAP_SMP_CID) {
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
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} else {
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smp_br_state_machine_event(p_cb, SMP_BR_AUTH_CMPL_EVT, &reason);
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}
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}
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}
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/*******************************************************************************
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**
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** Function smp_br_connect_callback
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**
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** Description This callback function is called by L2CAP to indicate that
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** SMP BR channel is
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** connected (conn = TRUE)/disconnected (conn = FALSE).
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**
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*******************************************************************************/
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#if (CLASSIC_BT_INCLUDED == TRUE)
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static void smp_br_connect_callback(UINT16 channel, BD_ADDR bd_addr, BOOLEAN connected,
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UINT16 reason, tBT_TRANSPORT transport)
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{
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tSMP_CB *p_cb = &smp_cb;
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tSMP_INT_DATA int_data;
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SMP_TRACE_EVENT ("%s", __func__);
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if (transport != BT_TRANSPORT_BR_EDR) {
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SMP_TRACE_EVENT ("%s is called on unexpected transport %d\n",
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__func__, transport);
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return;
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}
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if (!(memcmp(bd_addr, p_cb->pairing_bda, BD_ADDR_LEN) == 0)) {
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return;
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}
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SMP_TRACE_EVENT ("%s for pairing BDA: %08x%04x Event: %s\n",
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__func__,
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(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
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(bd_addr[4] << 8) + bd_addr[5],
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(connected) ? "connected" : "disconnected");
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if (connected) {
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if (!p_cb->connect_initialized) {
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p_cb->connect_initialized = TRUE;
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/* initialize local i/r key to be default keys */
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p_cb->local_r_key = p_cb->local_i_key = SMP_BR_SEC_DEFAULT_KEY;
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p_cb->loc_auth_req = p_cb->peer_auth_req = 0;
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p_cb->cb_evt = SMP_BR_KEYS_REQ_EVT;
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smp_br_state_machine_event(p_cb, SMP_BR_L2CAP_CONN_EVT, NULL);
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}
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} else {
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int_data.reason = reason;
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/* Disconnected while doing security */
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smp_br_state_machine_event(p_cb, SMP_BR_L2CAP_DISCONN_EVT, &int_data);
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}
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}
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/*******************************************************************************
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**
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** Function smp_br_data_received
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**
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** Description This function is called when data is received from L2CAP on
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** SMP BR channel.
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**
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** Returns void
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**
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*******************************************************************************/
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static void smp_br_data_received(UINT16 channel, BD_ADDR bd_addr, BT_HDR *p_buf)
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{
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tSMP_CB *p_cb = &smp_cb;
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UINT8 *p = (UINT8 *)(p_buf + 1) + p_buf->offset;
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UINT8 cmd ;
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SMP_TRACE_EVENT ("SMDBG l2c %s\n", __func__);
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STREAM_TO_UINT8(cmd, p);
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/* sanity check */
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if ((SMP_OPCODE_MAX < cmd) || (SMP_OPCODE_MIN > cmd)) {
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SMP_TRACE_WARNING( "Ignore received command with RESERVED code 0x%02x", cmd);
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osi_free(p_buf);
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return;
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}
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/* reject the pairing request if there is an on-going SMP pairing */
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if (SMP_OPCODE_PAIRING_REQ == cmd) {
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if ((p_cb->state == SMP_STATE_IDLE) && (p_cb->br_state == SMP_BR_STATE_IDLE)) {
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p_cb->role = HCI_ROLE_SLAVE;
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p_cb->smp_over_br = TRUE;
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memcpy(&p_cb->pairing_bda[0], bd_addr, BD_ADDR_LEN);
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} else if (memcmp(&bd_addr[0], p_cb->pairing_bda, BD_ADDR_LEN)) {
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osi_free (p_buf);
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smp_reject_unexpected_pairing_command(bd_addr);
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return;
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}
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/* else, out of state pairing request received, passed into State Machine */
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}
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if (memcmp(&bd_addr[0], p_cb->pairing_bda, BD_ADDR_LEN) == 0) {
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btu_stop_timer (&p_cb->rsp_timer_ent);
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btu_start_timer (&p_cb->rsp_timer_ent, BTU_TTYPE_SMP_PAIRING_CMD,
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SMP_WAIT_FOR_RSP_TOUT);
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p_cb->rcvd_cmd_code = cmd;
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p_cb->rcvd_cmd_len = (UINT8) p_buf->len;
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smp_br_state_machine_event(p_cb, cmd, p);
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}
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osi_free (p_buf);
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}
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#endif /* CLASSIC_BT_INCLUDED == TRUE */
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#endif /* SMP_INCLUDED == TRUE */
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