| /****************************************************************************** |
| * |
| * Copyright 2002-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * This AVDTP adaption layer module interfaces to L2CAP |
| * |
| ******************************************************************************/ |
| |
| #include "avdt_int.h" |
| #include "bt_target.h" |
| #include "bta/include/bta_av_api.h" |
| #include "btm_api.h" |
| #include "device/include/interop.h" |
| #include "l2c_api.h" |
| #include "l2cdefs.h" |
| #include "osi/include/allocator.h" |
| #include "osi/include/osi.h" |
| #include "stack/include/acl_api.h" |
| #include "stack/include/bt_hdr.h" |
| #include "types/raw_address.h" |
| |
| #include <base/logging.h> |
| |
| /* callback function declarations */ |
| void avdt_l2c_connect_ind_cback(const RawAddress& bd_addr, uint16_t lcid, |
| uint16_t psm, uint8_t id); |
| void avdt_l2c_connect_cfm_cback(uint16_t lcid, uint16_t result); |
| void avdt_l2c_config_cfm_cback(uint16_t lcid, uint16_t result, |
| tL2CAP_CFG_INFO* p_cfg); |
| void avdt_l2c_config_ind_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg); |
| void avdt_l2c_disconnect_ind_cback(uint16_t lcid, bool ack_needed); |
| void avdt_l2c_congestion_ind_cback(uint16_t lcid, bool is_congested); |
| void avdt_l2c_data_ind_cback(uint16_t lcid, BT_HDR* p_buf); |
| static void avdt_on_l2cap_error(uint16_t lcid, uint16_t result); |
| |
| /* L2CAP callback function structure */ |
| const tL2CAP_APPL_INFO avdt_l2c_appl = {avdt_l2c_connect_ind_cback, |
| avdt_l2c_connect_cfm_cback, |
| avdt_l2c_config_ind_cback, |
| avdt_l2c_config_cfm_cback, |
| avdt_l2c_disconnect_ind_cback, |
| NULL, |
| avdt_l2c_data_ind_cback, |
| avdt_l2c_congestion_ind_cback, |
| NULL, |
| avdt_on_l2cap_error, |
| NULL, |
| NULL, |
| NULL}; |
| |
| /******************************************************************************* |
| * |
| * Function avdt_sec_check_complete_term |
| * |
| * Description The function called when Security Manager finishes |
| * verification of the service side connection |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void avdt_sec_check_complete_term(const RawAddress* bd_addr, |
| tBT_TRANSPORT transport, |
| void* p_ref_data) { |
| AvdtpCcb* p_ccb = NULL; |
| AvdtpTransportChannel* p_tbl; |
| |
| p_ccb = avdt_ccb_by_bd(*bd_addr); |
| |
| p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_SEC_ACP); |
| if (p_tbl == NULL) return; |
| |
| /* store idx in LCID table, store LCID in routing table */ |
| avdtp_cb.ad.lcid_tbl[p_tbl->lcid] = avdt_ad_tc_tbl_to_idx(p_tbl); |
| avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].lcid = p_tbl->lcid; |
| |
| /* transition to configuration state */ |
| p_tbl->state = AVDT_AD_ST_CFG; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_sec_check_complete_orig |
| * |
| * Description The function called when Security Manager finishes |
| * verification of the service side connection |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void avdt_sec_check_complete_orig(const RawAddress* bd_addr, |
| tBT_TRANSPORT trasnport, |
| UNUSED_ATTR void* p_ref_data, |
| uint8_t res) { |
| AvdtpCcb* p_ccb = NULL; |
| AvdtpTransportChannel* p_tbl; |
| |
| AVDT_TRACE_DEBUG("avdt_sec_check_complete_orig res: %d", res); |
| if (bd_addr) p_ccb = avdt_ccb_by_bd(*bd_addr); |
| p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_SEC_INT); |
| if (p_tbl == NULL) return; |
| |
| if (res == BTM_SUCCESS) { |
| /* set channel state */ |
| p_tbl->state = AVDT_AD_ST_CFG; |
| } else { |
| avdt_l2c_disconnect(p_tbl->lcid); |
| avdt_ad_tc_close_ind(p_tbl); |
| } |
| } |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_connect_ind_cback |
| * |
| * Description This is the L2CAP connect indication callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_connect_ind_cback(const RawAddress& bd_addr, uint16_t lcid, |
| UNUSED_ATTR uint16_t psm, uint8_t id) { |
| AvdtpCcb* p_ccb; |
| AvdtpTransportChannel* p_tbl = NULL; |
| uint16_t result; |
| |
| /* do we already have a control channel for this peer? */ |
| p_ccb = avdt_ccb_by_bd(bd_addr); |
| if (p_ccb == NULL) { |
| /* no, allocate ccb */ |
| int channel_index = BTA_AvObtainPeerChannelIndex(bd_addr); |
| if (channel_index >= 0) { |
| p_ccb = avdt_ccb_alloc_by_channel_index(bd_addr, channel_index); |
| } |
| if (p_ccb == nullptr) { |
| p_ccb = avdt_ccb_alloc(bd_addr); |
| } |
| if (p_ccb == NULL) { |
| /* no ccb available, reject L2CAP connection */ |
| result = L2CAP_CONN_NO_RESOURCES; |
| } else { |
| /* allocate and set up entry; first channel is always signaling */ |
| p_tbl = avdt_ad_tc_tbl_alloc(p_ccb); |
| p_tbl->my_mtu = kAvdtpMtu; |
| p_tbl->tcid = AVDT_CHAN_SIG; |
| p_tbl->lcid = lcid; |
| p_tbl->state = AVDT_AD_ST_SEC_ACP; |
| p_tbl->cfg_flags = AVDT_L2C_CFG_CONN_ACP; |
| |
| if (interop_match_addr(INTEROP_2MBPS_LINK_ONLY, &bd_addr)) { |
| // Disable 3DH packets for AVDT ACL to improve sensitivity on HS |
| btm_set_packet_types_from_address( |
| bd_addr, |
| (acl_get_supported_packet_types() | HCI_PKT_TYPES_MASK_NO_3_DH1 | |
| HCI_PKT_TYPES_MASK_NO_3_DH3 | HCI_PKT_TYPES_MASK_NO_3_DH5)); |
| } |
| /* Assume security check is complete */ |
| avdt_sec_check_complete_term(&p_ccb->peer_addr, BT_TRANSPORT_BR_EDR, |
| nullptr); |
| return; |
| } |
| } else { |
| /* deal with simultaneous control channel connect case */ |
| p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_CONN); |
| if (p_tbl != NULL) { |
| /* reject their connection */ |
| result = L2CAP_CONN_NO_RESOURCES; |
| } else { |
| /* This must be a traffic channel; are we accepting a traffic channel |
| * for this ccb? |
| */ |
| p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_MEDIA, p_ccb, AVDT_AD_ST_ACP); |
| if (p_tbl != NULL) { |
| /* yes; proceed with connection */ |
| result = L2CAP_CONN_OK; |
| } else { |
| /* this must be a reporting channel; are we accepting a reporting |
| * channel for this ccb? |
| */ |
| p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_REPORT, p_ccb, AVDT_AD_ST_ACP); |
| if (p_tbl != NULL) { |
| /* yes; proceed with connection */ |
| result = L2CAP_CONN_OK; |
| } else { |
| /* else we're not listening for traffic channel; reject */ |
| result = L2CAP_CONN_NO_PSM; |
| } |
| } |
| } |
| } |
| |
| /* If we reject the connection, send DisconnectReq */ |
| if (result != L2CAP_CONN_OK) { |
| L2CA_DisconnectReq(lcid); |
| return; |
| } |
| |
| /* if result ok, proceed with connection */ |
| /* store idx in LCID table, store LCID in routing table */ |
| avdtp_cb.ad.lcid_tbl[lcid] = avdt_ad_tc_tbl_to_idx(p_tbl); |
| avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].lcid = lcid; |
| |
| /* transition to configuration state */ |
| p_tbl->state = AVDT_AD_ST_CFG; |
| } |
| |
| static void avdt_on_l2cap_error(uint16_t lcid, uint16_t result) { |
| avdt_l2c_disconnect(lcid); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_connect_cfm_cback |
| * |
| * Description This is the L2CAP connect confirm callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_connect_cfm_cback(uint16_t lcid, uint16_t result) { |
| AvdtpTransportChannel* p_tbl; |
| AvdtpCcb* p_ccb; |
| |
| AVDT_TRACE_DEBUG("avdt_l2c_connect_cfm_cback lcid: %d, result: %d", lcid, |
| result); |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| /* if in correct state */ |
| if (p_tbl->state == AVDT_AD_ST_CONN) { |
| /* if result successful */ |
| if (result == L2CAP_CONN_OK) { |
| if (p_tbl->tcid != AVDT_CHAN_SIG) { |
| /* set channel state */ |
| p_tbl->state = AVDT_AD_ST_CFG; |
| } else { |
| p_ccb = avdt_ccb_by_idx(p_tbl->ccb_idx); |
| if (p_ccb == NULL) { |
| result = L2CAP_CONN_NO_RESOURCES; |
| } else { |
| /* set channel state */ |
| p_tbl->state = AVDT_AD_ST_SEC_INT; |
| p_tbl->lcid = lcid; |
| p_tbl->cfg_flags = AVDT_L2C_CFG_CONN_INT; |
| |
| if (interop_match_addr(INTEROP_2MBPS_LINK_ONLY, |
| (const RawAddress*)&p_ccb->peer_addr)) { |
| // Disable 3DH packets for AVDT ACL to improve sensitivity on HS |
| btm_set_packet_types_from_address( |
| p_ccb->peer_addr, |
| (acl_get_supported_packet_types() | |
| HCI_PKT_TYPES_MASK_NO_3_DH1 | HCI_PKT_TYPES_MASK_NO_3_DH3 | |
| HCI_PKT_TYPES_MASK_NO_3_DH5)); |
| } |
| |
| /* Assume security check is complete */ |
| avdt_sec_check_complete_orig(&p_ccb->peer_addr, BT_TRANSPORT_BR_EDR, |
| nullptr, BTM_SUCCESS); |
| } |
| } |
| } |
| |
| /* failure; notify adaption that channel closed */ |
| if (result != L2CAP_CONN_OK) { |
| LOG(ERROR) << __func__ << ": invoked with non OK status"; |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_config_cfm_cback |
| * |
| * Description This is the L2CAP config confirm callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_config_cfm_cback(uint16_t lcid, uint16_t initiator, |
| tL2CAP_CFG_INFO* p_cfg) { |
| avdt_l2c_config_ind_cback(lcid, p_cfg); |
| |
| AvdtpTransportChannel* p_tbl; |
| |
| AVDT_TRACE_DEBUG("%s: lcid: %d", __func__, lcid); |
| |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| p_tbl->lcid = lcid; |
| |
| /* if in correct state */ |
| if (p_tbl->state == AVDT_AD_ST_CFG) { |
| avdt_ad_tc_open_ind(p_tbl); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_config_ind_cback |
| * |
| * Description This is the L2CAP config indication callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_config_ind_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg) { |
| AvdtpTransportChannel* p_tbl; |
| |
| AVDT_TRACE_DEBUG("%s: lcid: %d", __func__, lcid); |
| |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| /* store the mtu in tbl */ |
| if (p_cfg->mtu_present) { |
| p_tbl->peer_mtu = p_cfg->mtu; |
| } else { |
| p_tbl->peer_mtu = L2CAP_DEFAULT_MTU; |
| } |
| AVDT_TRACE_DEBUG("%s: peer_mtu: %d, lcid: %d", __func__, p_tbl->peer_mtu, |
| lcid); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_disconnect_ind_cback |
| * |
| * Description This is the L2CAP disconnect indication callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_disconnect_ind_cback(uint16_t lcid, bool ack_needed) { |
| AvdtpTransportChannel* p_tbl; |
| |
| AVDT_TRACE_DEBUG("avdt_l2c_disconnect_ind_cback lcid: %d, ack_needed: %d", |
| lcid, ack_needed); |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| avdt_ad_tc_close_ind(p_tbl); |
| } |
| } |
| |
| void avdt_l2c_disconnect(uint16_t lcid) { |
| L2CA_DisconnectReq(lcid); |
| AvdtpTransportChannel* p_tbl; |
| |
| AVDT_TRACE_DEBUG("avdt_l2c_disconnect_cfm_cback lcid: %d", lcid); |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| avdt_ad_tc_close_ind(p_tbl); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_congestion_ind_cback |
| * |
| * Description This is the L2CAP congestion indication callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_congestion_ind_cback(uint16_t lcid, bool is_congested) { |
| AvdtpTransportChannel* p_tbl; |
| |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| avdt_ad_tc_cong_ind(p_tbl, is_congested); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function avdt_l2c_data_ind_cback |
| * |
| * Description This is the L2CAP data indication callback function. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void avdt_l2c_data_ind_cback(uint16_t lcid, BT_HDR* p_buf) { |
| AvdtpTransportChannel* p_tbl; |
| |
| /* look up info for this channel */ |
| p_tbl = avdt_ad_tc_tbl_by_lcid(lcid); |
| if (p_tbl != NULL) { |
| avdt_ad_tc_data_ind(p_tbl, p_buf); |
| } else /* prevent buffer leak */ |
| osi_free(p_buf); |
| } |
