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411 lines
14 KiB
411 lines
14 KiB
/******************************************************************************
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*
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* Copyright 2002-2012 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 AVDTP adaption layer module interfaces to L2CAP
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*
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******************************************************************************/
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#include "avdt_int.h"
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#include "bt_target.h"
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#include "bt_types.h"
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#include "bta/include/bta_av_api.h"
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#include "btm_api.h"
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#include "device/include/interop.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 "stack/include/acl_api.h"
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/* callback function declarations */
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void avdt_l2c_connect_ind_cback(const RawAddress& bd_addr, uint16_t lcid,
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uint16_t psm, uint8_t id);
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void avdt_l2c_connect_cfm_cback(uint16_t lcid, uint16_t result);
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void avdt_l2c_config_cfm_cback(uint16_t lcid, uint16_t result,
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tL2CAP_CFG_INFO* p_cfg);
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void avdt_l2c_config_ind_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg);
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void avdt_l2c_disconnect_ind_cback(uint16_t lcid, bool ack_needed);
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void avdt_l2c_congestion_ind_cback(uint16_t lcid, bool is_congested);
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void avdt_l2c_data_ind_cback(uint16_t lcid, BT_HDR* p_buf);
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static void avdt_on_l2cap_error(uint16_t lcid, uint16_t result);
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/* L2CAP callback function structure */
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const tL2CAP_APPL_INFO avdt_l2c_appl = {
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avdt_l2c_connect_ind_cback, avdt_l2c_connect_cfm_cback,
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avdt_l2c_config_ind_cback, avdt_l2c_config_cfm_cback,
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avdt_l2c_disconnect_ind_cback, avdt_l2c_data_ind_cback,
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avdt_l2c_congestion_ind_cback, NULL,
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avdt_on_l2cap_error, NULL,
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NULL, NULL
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};
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/*******************************************************************************
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*
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* Function avdt_sec_check_complete_term
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*
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* Description The function called when Security Manager finishes
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* verification of the service side connection
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*
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* Returns void
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*
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******************************************************************************/
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static void avdt_sec_check_complete_term(const RawAddress* bd_addr,
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tBT_TRANSPORT transport,
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void* p_ref_data) {
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AvdtpCcb* p_ccb = NULL;
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AvdtpTransportChannel* p_tbl;
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p_ccb = avdt_ccb_by_bd(*bd_addr);
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p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_SEC_ACP);
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if (p_tbl == NULL) return;
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/* store idx in LCID table, store LCID in routing table */
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avdtp_cb.ad.lcid_tbl[p_tbl->lcid] = avdt_ad_tc_tbl_to_idx(p_tbl);
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avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].lcid = p_tbl->lcid;
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/* transition to configuration state */
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p_tbl->state = AVDT_AD_ST_CFG;
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}
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/*******************************************************************************
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*
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* Function avdt_sec_check_complete_orig
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*
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* Description The function called when Security Manager finishes
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* verification of the service side connection
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*
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* Returns void
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*
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******************************************************************************/
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static void avdt_sec_check_complete_orig(const RawAddress* bd_addr,
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tBT_TRANSPORT trasnport,
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UNUSED_ATTR void* p_ref_data,
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uint8_t res) {
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AvdtpCcb* p_ccb = NULL;
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AvdtpTransportChannel* p_tbl;
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AVDT_TRACE_DEBUG("avdt_sec_check_complete_orig res: %d", res);
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if (bd_addr) p_ccb = avdt_ccb_by_bd(*bd_addr);
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p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_SEC_INT);
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if (p_tbl == NULL) return;
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if (res == BTM_SUCCESS) {
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/* set channel state */
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p_tbl->state = AVDT_AD_ST_CFG;
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} else {
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avdt_l2c_disconnect(p_tbl->lcid);
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avdt_ad_tc_close_ind(p_tbl);
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}
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}
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/*******************************************************************************
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*
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* Function avdt_l2c_connect_ind_cback
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*
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* Description This is the L2CAP connect indication callback function.
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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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void avdt_l2c_connect_ind_cback(const RawAddress& bd_addr, uint16_t lcid,
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UNUSED_ATTR uint16_t psm, uint8_t id) {
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AvdtpCcb* p_ccb;
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AvdtpTransportChannel* p_tbl = NULL;
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uint16_t result;
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/* do we already have a control channel for this peer? */
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p_ccb = avdt_ccb_by_bd(bd_addr);
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if (p_ccb == NULL) {
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/* no, allocate ccb */
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int channel_index = BTA_AvObtainPeerChannelIndex(bd_addr);
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if (channel_index >= 0) {
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p_ccb = avdt_ccb_alloc_by_channel_index(bd_addr, channel_index);
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}
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if (p_ccb == nullptr) {
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p_ccb = avdt_ccb_alloc(bd_addr);
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}
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if (p_ccb == NULL) {
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/* no ccb available, reject L2CAP connection */
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result = L2CAP_CONN_NO_RESOURCES;
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} else {
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/* allocate and set up entry; first channel is always signaling */
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p_tbl = avdt_ad_tc_tbl_alloc(p_ccb);
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p_tbl->my_mtu = kAvdtpMtu;
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p_tbl->tcid = AVDT_CHAN_SIG;
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p_tbl->lcid = lcid;
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p_tbl->state = AVDT_AD_ST_SEC_ACP;
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p_tbl->cfg_flags = AVDT_L2C_CFG_CONN_ACP;
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if (interop_match_addr(INTEROP_2MBPS_LINK_ONLY, &bd_addr)) {
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// Disable 3DH packets for AVDT ACL to improve sensitivity on HS
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btm_set_packet_types_from_address(
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bd_addr,
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(acl_get_supported_packet_types() | HCI_PKT_TYPES_MASK_NO_3_DH1 |
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HCI_PKT_TYPES_MASK_NO_3_DH3 | HCI_PKT_TYPES_MASK_NO_3_DH5));
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}
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/* Assume security check is complete */
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avdt_sec_check_complete_term(&p_ccb->peer_addr, BT_TRANSPORT_BR_EDR,
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nullptr);
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return;
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}
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} else {
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/* deal with simultaneous control channel connect case */
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p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_CONN);
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if (p_tbl != NULL) {
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/* reject their connection */
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result = L2CAP_CONN_NO_RESOURCES;
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} else {
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/* This must be a traffic channel; are we accepting a traffic channel
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* for this ccb?
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*/
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p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_MEDIA, p_ccb, AVDT_AD_ST_ACP);
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if (p_tbl != NULL) {
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/* yes; proceed with connection */
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result = L2CAP_CONN_OK;
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} else {
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/* this must be a reporting channel; are we accepting a reporting
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* channel for this ccb?
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*/
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p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_REPORT, p_ccb, AVDT_AD_ST_ACP);
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if (p_tbl != NULL) {
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/* yes; proceed with connection */
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result = L2CAP_CONN_OK;
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} else {
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/* else we're not listening for traffic channel; reject */
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result = L2CAP_CONN_NO_PSM;
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}
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}
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}
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}
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/* If we reject the connection, send DisconnectReq */
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if (result != L2CAP_CONN_OK) {
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L2CA_DisconnectReq(lcid);
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return;
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}
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/* if result ok, proceed with connection */
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/* store idx in LCID table, store LCID in routing table */
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avdtp_cb.ad.lcid_tbl[lcid] = avdt_ad_tc_tbl_to_idx(p_tbl);
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avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].lcid = lcid;
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/* transition to configuration state */
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p_tbl->state = AVDT_AD_ST_CFG;
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}
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static void avdt_on_l2cap_error(uint16_t lcid, uint16_t result) {
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avdt_l2c_disconnect(lcid);
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}
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/*******************************************************************************
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*
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* Function avdt_l2c_connect_cfm_cback
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*
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* Description This is the L2CAP connect confirm callback function.
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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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void avdt_l2c_connect_cfm_cback(uint16_t lcid, uint16_t result) {
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AvdtpTransportChannel* p_tbl;
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AvdtpCcb* p_ccb;
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AVDT_TRACE_DEBUG("avdt_l2c_connect_cfm_cback lcid: %d, result: %d", lcid,
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result);
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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/* if in correct state */
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if (p_tbl->state == AVDT_AD_ST_CONN) {
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/* if result successful */
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if (result == L2CAP_CONN_OK) {
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if (p_tbl->tcid != AVDT_CHAN_SIG) {
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/* set channel state */
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p_tbl->state = AVDT_AD_ST_CFG;
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} else {
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p_ccb = avdt_ccb_by_idx(p_tbl->ccb_idx);
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if (p_ccb == NULL) {
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result = L2CAP_CONN_NO_RESOURCES;
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} else {
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/* set channel state */
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p_tbl->state = AVDT_AD_ST_SEC_INT;
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p_tbl->lcid = lcid;
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p_tbl->cfg_flags = AVDT_L2C_CFG_CONN_INT;
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if (interop_match_addr(INTEROP_2MBPS_LINK_ONLY,
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(const RawAddress*)&p_ccb->peer_addr)) {
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// Disable 3DH packets for AVDT ACL to improve sensitivity on HS
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btm_set_packet_types_from_address(
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p_ccb->peer_addr,
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(acl_get_supported_packet_types() |
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HCI_PKT_TYPES_MASK_NO_3_DH1 | HCI_PKT_TYPES_MASK_NO_3_DH3 |
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HCI_PKT_TYPES_MASK_NO_3_DH5));
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}
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/* Assume security check is complete */
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avdt_sec_check_complete_orig(&p_ccb->peer_addr, BT_TRANSPORT_BR_EDR,
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nullptr, BTM_SUCCESS);
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}
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}
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}
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/* failure; notify adaption that channel closed */
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if (result != L2CAP_CONN_OK) {
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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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/*******************************************************************************
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*
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* Function avdt_l2c_config_cfm_cback
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*
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* Description This is the L2CAP config confirm callback function.
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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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void avdt_l2c_config_cfm_cback(uint16_t lcid, uint16_t initiator,
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tL2CAP_CFG_INFO* p_cfg) {
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avdt_l2c_config_ind_cback(lcid, p_cfg);
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AvdtpTransportChannel* p_tbl;
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AVDT_TRACE_DEBUG("%s: lcid: %d", __func__, lcid);
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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p_tbl->lcid = lcid;
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/* if in correct state */
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if (p_tbl->state == AVDT_AD_ST_CFG) {
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avdt_ad_tc_open_ind(p_tbl);
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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 avdt_l2c_config_ind_cback
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*
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* Description This is the L2CAP config indication callback function.
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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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void avdt_l2c_config_ind_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg) {
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AvdtpTransportChannel* p_tbl;
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AVDT_TRACE_DEBUG("%s: lcid: %d", __func__, lcid);
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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/* store the mtu in tbl */
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if (p_cfg->mtu_present) {
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p_tbl->peer_mtu = p_cfg->mtu;
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} else {
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p_tbl->peer_mtu = L2CAP_DEFAULT_MTU;
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}
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AVDT_TRACE_DEBUG("%s: peer_mtu: %d, lcid: %d", __func__, p_tbl->peer_mtu,
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lcid);
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}
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}
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/*******************************************************************************
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*
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* Function avdt_l2c_disconnect_ind_cback
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*
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* Description This is the L2CAP disconnect indication callback function.
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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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void avdt_l2c_disconnect_ind_cback(uint16_t lcid, bool ack_needed) {
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AvdtpTransportChannel* p_tbl;
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AVDT_TRACE_DEBUG("avdt_l2c_disconnect_ind_cback lcid: %d, ack_needed: %d",
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lcid, ack_needed);
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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avdt_ad_tc_close_ind(p_tbl);
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}
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}
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void avdt_l2c_disconnect(uint16_t lcid) {
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L2CA_DisconnectReq(lcid);
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AvdtpTransportChannel* p_tbl;
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AVDT_TRACE_DEBUG("avdt_l2c_disconnect_cfm_cback lcid: %d", lcid);
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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avdt_ad_tc_close_ind(p_tbl);
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}
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}
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/*******************************************************************************
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*
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* Function avdt_l2c_congestion_ind_cback
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*
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* Description This is the L2CAP congestion indication callback function.
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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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void avdt_l2c_congestion_ind_cback(uint16_t lcid, bool is_congested) {
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AvdtpTransportChannel* p_tbl;
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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avdt_ad_tc_cong_ind(p_tbl, is_congested);
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}
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}
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/*******************************************************************************
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*
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* Function avdt_l2c_data_ind_cback
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*
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* Description This is the L2CAP data indication callback function.
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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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void avdt_l2c_data_ind_cback(uint16_t lcid, BT_HDR* p_buf) {
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AvdtpTransportChannel* p_tbl;
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/* look up info for this channel */
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p_tbl = avdt_ad_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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avdt_ad_tc_data_ind(p_tbl, p_buf);
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} else /* prevent buffer leak */
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osi_free(p_buf);
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}
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