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410 lines
14 KiB
410 lines
14 KiB
/******************************************************************************
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*
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* Copyright 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 the main SDP functions
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*
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******************************************************************************/
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#include <string.h>
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#include "bt_common.h"
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#include "bt_target.h"
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#include "hcidefs.h"
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#include "l2c_api.h"
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#include "l2cdefs.h"
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#include "osi/include/osi.h"
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#include "sdp_api.h"
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#include "sdpint.h"
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#include "stack/btm/btm_sec.h"
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/******************************************************************************/
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/* G L O B A L S D P D A T A */
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/******************************************************************************/
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tSDP_CB sdp_cb;
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/******************************************************************************/
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/* L O C A L F U N C T I O N P R O T O T Y P E S */
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/******************************************************************************/
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static void sdp_connect_ind(const RawAddress& bd_addr, uint16_t l2cap_cid,
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UNUSED_ATTR uint16_t psm, uint8_t l2cap_id);
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static void sdp_config_ind(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg);
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static void sdp_config_cfm(uint16_t l2cap_cid, uint16_t result,
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tL2CAP_CFG_INFO* p_cfg);
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static void sdp_disconnect_ind(uint16_t l2cap_cid, bool ack_needed);
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static void sdp_data_ind(uint16_t l2cap_cid, BT_HDR* p_msg);
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static void sdp_connect_cfm(uint16_t l2cap_cid, uint16_t result);
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static void sdp_on_l2cap_error(uint16_t l2cap_cid, uint16_t result);
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/*******************************************************************************
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*
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* Function sdp_init
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*
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* Description This function initializes the SDP unit.
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*
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* Returns void
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*
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******************************************************************************/
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void sdp_init(void) {
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/* Clears all structures and local SDP database (if Server is enabled) */
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memset(&sdp_cb, 0, sizeof(tSDP_CB));
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for (int i = 0; i < SDP_MAX_CONNECTIONS; i++) {
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sdp_cb.ccb[i].sdp_conn_timer = alarm_new("sdp.sdp_conn_timer");
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}
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/* Initialize the L2CAP configuration. We only care about MTU */
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sdp_cb.l2cap_my_cfg.mtu_present = true;
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sdp_cb.l2cap_my_cfg.mtu = SDP_MTU_SIZE;
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sdp_cb.max_attr_list_size = SDP_MTU_SIZE - 16;
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sdp_cb.max_recs_per_search = SDP_MAX_DISC_SERVER_RECS;
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sdp_cb.trace_level = BT_TRACE_LEVEL_WARNING;
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sdp_cb.reg_info.pL2CA_ConnectInd_Cb = sdp_connect_ind;
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sdp_cb.reg_info.pL2CA_ConnectCfm_Cb = sdp_connect_cfm;
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sdp_cb.reg_info.pL2CA_ConfigInd_Cb = sdp_config_ind;
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sdp_cb.reg_info.pL2CA_ConfigCfm_Cb = sdp_config_cfm;
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sdp_cb.reg_info.pL2CA_DisconnectInd_Cb = sdp_disconnect_ind;
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sdp_cb.reg_info.pL2CA_DataInd_Cb = sdp_data_ind;
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sdp_cb.reg_info.pL2CA_Error_Cb = sdp_on_l2cap_error;
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/* Now, register with L2CAP */
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if (!L2CA_Register2(BT_PSM_SDP, sdp_cb.reg_info, true /* enable_snoop */,
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nullptr, SDP_MTU_SIZE, 0, BTM_SEC_NONE)) {
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SDP_TRACE_ERROR("SDP Registration failed");
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}
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}
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void sdp_free(void) {
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for (int i = 0; i < SDP_MAX_CONNECTIONS; i++) {
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alarm_free(sdp_cb.ccb[i].sdp_conn_timer);
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sdp_cb.ccb[i].sdp_conn_timer = NULL;
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}
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}
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/*******************************************************************************
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*
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* Function sdp_connect_ind
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*
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* Description This function handles an inbound connection indication
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* from L2CAP. This is the case where we are acting as a
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* server.
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*
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* Returns void
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*
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******************************************************************************/
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static void sdp_connect_ind(const RawAddress& bd_addr, uint16_t l2cap_cid,
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UNUSED_ATTR uint16_t psm, uint8_t l2cap_id) {
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tCONN_CB* p_ccb = sdpu_allocate_ccb();
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if (p_ccb == NULL) return;
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/* Transition to the next appropriate state, waiting for config setup. */
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p_ccb->con_state = SDP_STATE_CFG_SETUP;
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/* Save the BD Address and Channel ID. */
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p_ccb->device_address = bd_addr;
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p_ccb->connection_id = l2cap_cid;
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}
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static void sdp_on_l2cap_error(uint16_t l2cap_cid, uint16_t result) {
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tCONN_CB* p_ccb = sdpu_find_ccb_by_cid(l2cap_cid);
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if (p_ccb == nullptr) return;
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sdp_disconnect(p_ccb, SDP_CFG_FAILED);
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}
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/*******************************************************************************
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*
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* Function sdp_connect_cfm
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*
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* Description This function handles the connect confirm events
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* from L2CAP. This is the case when we are acting as a
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* client and have sent a connect request.
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*
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* Returns void
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*
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******************************************************************************/
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static void sdp_connect_cfm(uint16_t l2cap_cid, uint16_t result) {
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tCONN_CB* p_ccb;
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/* Find CCB based on CID */
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p_ccb = sdpu_find_ccb_by_cid(l2cap_cid);
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if (p_ccb == NULL) {
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SDP_TRACE_WARNING("SDP - Rcvd conn cnf for unknown CID 0x%x", l2cap_cid);
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return;
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}
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/* If the connection response contains success status, then */
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/* Transition to the next state and startup the timer. */
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if ((result == L2CAP_CONN_OK) && (p_ccb->con_state == SDP_STATE_CONN_SETUP)) {
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p_ccb->con_state = SDP_STATE_CFG_SETUP;
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} else {
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LOG(ERROR) << __func__ << ": invoked with non OK status";
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}
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}
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/*******************************************************************************
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*
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* Function sdp_config_ind
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*
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* Description This function processes the L2CAP configuration indication
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* event.
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*
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* Returns void
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*
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******************************************************************************/
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static void sdp_config_ind(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg) {
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tCONN_CB* p_ccb;
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/* Find CCB based on CID */
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p_ccb = sdpu_find_ccb_by_cid(l2cap_cid);
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if (p_ccb == NULL) {
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SDP_TRACE_WARNING("SDP - Rcvd L2CAP cfg ind, unknown CID: 0x%x", l2cap_cid);
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return;
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}
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/* Remember the remote MTU size */
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if (!p_cfg->mtu_present) {
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/* use min(L2CAP_DEFAULT_MTU,SDP_MTU_SIZE) for GKI buffer size reasons */
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p_ccb->rem_mtu_size =
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(L2CAP_DEFAULT_MTU > SDP_MTU_SIZE) ? SDP_MTU_SIZE : L2CAP_DEFAULT_MTU;
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} else {
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if (p_cfg->mtu > SDP_MTU_SIZE)
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p_ccb->rem_mtu_size = SDP_MTU_SIZE;
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else
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p_ccb->rem_mtu_size = p_cfg->mtu;
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}
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SDP_TRACE_EVENT("SDP - Rcvd cfg ind, sent cfg cfm, CID: 0x%x", l2cap_cid);
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}
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/*******************************************************************************
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*
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* Function sdp_config_cfm
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*
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* Description This function processes the L2CAP configuration confirmation
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* event.
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*
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* Returns void
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*
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******************************************************************************/
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static void sdp_config_cfm(uint16_t l2cap_cid, uint16_t initiator,
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tL2CAP_CFG_INFO* p_cfg) {
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sdp_config_ind(l2cap_cid, p_cfg);
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tCONN_CB* p_ccb;
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SDP_TRACE_EVENT("SDP - Rcvd cfg cfm, CID: 0x%x", l2cap_cid);
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/* Find CCB based on CID */
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p_ccb = sdpu_find_ccb_by_cid(l2cap_cid);
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if (p_ccb == NULL) {
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SDP_TRACE_WARNING("SDP - Rcvd L2CAP cfg ind, unknown CID: 0x%x", l2cap_cid);
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return;
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}
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/* For now, always accept configuration from the other side */
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p_ccb->con_state = SDP_STATE_CONNECTED;
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if (p_ccb->con_flags & SDP_FLAGS_IS_ORIG) {
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sdp_disc_connected(p_ccb);
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} else {
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/* Start inactivity timer */
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alarm_set_on_mloop(p_ccb->sdp_conn_timer, SDP_INACT_TIMEOUT_MS,
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sdp_conn_timer_timeout, p_ccb);
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}
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}
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/*******************************************************************************
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*
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* Function sdp_disconnect_ind
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*
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* Description This function handles a disconnect event from L2CAP. If
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* requested to, we ack the disconnect before dropping the CCB
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*
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* Returns void
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*
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******************************************************************************/
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static void sdp_disconnect_ind(uint16_t l2cap_cid, bool ack_needed) {
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tCONN_CB* p_ccb;
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/* Find CCB based on CID */
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p_ccb = sdpu_find_ccb_by_cid(l2cap_cid);
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if (p_ccb == NULL) {
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SDP_TRACE_WARNING("SDP - Rcvd L2CAP disc, unknown CID: 0x%x", l2cap_cid);
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return;
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}
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SDP_TRACE_EVENT("SDP - Rcvd L2CAP disc, CID: 0x%x", l2cap_cid);
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/* Tell the user if there is a callback */
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if (p_ccb->p_cb)
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(*p_ccb->p_cb)(((p_ccb->con_state == SDP_STATE_CONNECTED)
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? SDP_SUCCESS
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: SDP_CONN_FAILED));
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else if (p_ccb->p_cb2)
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(*p_ccb->p_cb2)(
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((p_ccb->con_state == SDP_STATE_CONNECTED) ? SDP_SUCCESS
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: SDP_CONN_FAILED),
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p_ccb->user_data);
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sdpu_release_ccb(p_ccb);
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}
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/*******************************************************************************
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*
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* Function sdp_data_ind
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*
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* Description This function is called when data is received from L2CAP.
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* if we are the originator of the connection, we are the SDP
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* client, and the received message is queued for the client.
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*
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* If we are the destination of the connection, we are the SDP
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* server, so the message is passed to the server processing
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* function.
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*
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* Returns void
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*
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******************************************************************************/
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static void sdp_data_ind(uint16_t l2cap_cid, BT_HDR* p_msg) {
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tCONN_CB* p_ccb;
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/* Find CCB based on CID */
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p_ccb = sdpu_find_ccb_by_cid(l2cap_cid);
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if (p_ccb != NULL) {
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if (p_ccb->con_state == SDP_STATE_CONNECTED) {
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if (p_ccb->con_flags & SDP_FLAGS_IS_ORIG)
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sdp_disc_server_rsp(p_ccb, p_msg);
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else
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sdp_server_handle_client_req(p_ccb, p_msg);
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} else {
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SDP_TRACE_WARNING(
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"SDP - Ignored L2CAP data while in state: %d, CID: 0x%x",
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p_ccb->con_state, l2cap_cid);
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}
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} else {
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SDP_TRACE_WARNING("SDP - Rcvd L2CAP data, unknown CID: 0x%x", l2cap_cid);
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}
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osi_free(p_msg);
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}
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/*******************************************************************************
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*
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* Function sdp_conn_originate
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*
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* Description This function is called from the API to originate a
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* connection.
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*
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* Returns void
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*
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******************************************************************************/
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tCONN_CB* sdp_conn_originate(const RawAddress& p_bd_addr) {
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tCONN_CB* p_ccb;
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uint16_t cid;
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/* Allocate a new CCB. Return if none available. */
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p_ccb = sdpu_allocate_ccb();
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if (p_ccb == NULL) {
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SDP_TRACE_WARNING("%s: no spare CCB for peer %s", __func__,
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p_bd_addr.ToString().c_str());
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return (NULL);
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}
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SDP_TRACE_EVENT("%s: SDP - Originate started for peer %s", __func__,
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p_bd_addr.ToString().c_str());
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/* We are the originator of this connection */
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p_ccb->con_flags |= SDP_FLAGS_IS_ORIG;
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/* Save the BD Address and Channel ID. */
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p_ccb->device_address = p_bd_addr;
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/* Transition to the next appropriate state, waiting for connection confirm.
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*/
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p_ccb->con_state = SDP_STATE_CONN_SETUP;
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cid = L2CA_ConnectReq2(BT_PSM_SDP, p_bd_addr, BTM_SEC_NONE);
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/* Check if L2CAP started the connection process */
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if (cid == 0) {
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SDP_TRACE_WARNING("%s: SDP - Originate failed for peer %s", __func__,
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p_bd_addr.ToString().c_str());
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sdpu_release_ccb(p_ccb);
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return (NULL);
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}
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p_ccb->connection_id = cid;
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return (p_ccb);
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}
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/*******************************************************************************
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*
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* Function sdp_disconnect
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*
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* Description This function disconnects a connection.
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*
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* Returns void
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*
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******************************************************************************/
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void sdp_disconnect(tCONN_CB* p_ccb, tSDP_REASON reason) {
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SDP_TRACE_EVENT("SDP - disconnect CID: 0x%x", p_ccb->connection_id);
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/* Check if we have a connection ID */
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if (p_ccb->connection_id != 0) {
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L2CA_DisconnectReq(p_ccb->connection_id);
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p_ccb->disconnect_reason = reason;
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}
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/* Tell the user if there is a callback */
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if (p_ccb->p_cb)
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(*p_ccb->p_cb)(reason);
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else if (p_ccb->p_cb2)
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(*p_ccb->p_cb2)(reason, p_ccb->user_data);
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sdpu_release_ccb(p_ccb);
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}
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/*******************************************************************************
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*
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* Function sdp_conn_timer_timeout
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*
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* Description This function processes a timeout. Currently, we simply send
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* a disconnect request to L2CAP.
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*
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* Returns void
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*
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******************************************************************************/
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void sdp_conn_timer_timeout(void* data) {
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tCONN_CB* p_ccb = (tCONN_CB*)data;
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SDP_TRACE_EVENT("SDP - CCB timeout in state: %d CID: 0x%x", p_ccb->con_state,
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p_ccb->connection_id);
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L2CA_DisconnectReq(p_ccb->connection_id);
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/* Tell the user if there is a callback */
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if (p_ccb->p_cb)
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(*p_ccb->p_cb)(SDP_CONN_FAILED);
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else if (p_ccb->p_cb2)
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(*p_ccb->p_cb2)(SDP_CONN_FAILED, p_ccb->user_data);
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sdpu_release_ccb(p_ccb);
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}
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