| /****************************************************************************** |
| * |
| * Copyright (C) 1999-2012 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 file contains the main L2CAP entry points |
| * |
| ******************************************************************************/ |
| |
| #define LOG_TAG "bt_l2c_main" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "bt_target.h" |
| #include "btm_int.h" |
| #include "btu.h" |
| #include "device/include/controller.h" |
| #include "bt_common.h" |
| #include "hcimsgs.h" |
| #include "l2c_api.h" |
| #include "l2c_int.h" |
| #include "l2cdefs.h" |
| #include "osi/include/log.h" |
| |
| |
| extern fixed_queue_t *btu_general_alarm_queue; |
| |
| /********************************************************************************/ |
| /* L O C A L F U N C T I O N P R O T O T Y P E S */ |
| /********************************************************************************/ |
| static void process_l2cap_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len); |
| |
| /********************************************************************************/ |
| /* G L O B A L L 2 C A P D A T A */ |
| /********************************************************************************/ |
| #if L2C_DYNAMIC_MEMORY == FALSE |
| tL2C_CB l2cb; |
| #endif |
| |
| /******************************************************************************* |
| ** |
| ** Function l2c_rcv_acl_data |
| ** |
| ** Description This function is called from the HCI Interface when an ACL |
| ** data packet is received. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2c_rcv_acl_data (BT_HDR *p_msg) |
| { |
| UINT8 *p = (UINT8 *)(p_msg + 1) + p_msg->offset; |
| UINT16 handle, hci_len; |
| UINT8 pkt_type; |
| tL2C_LCB *p_lcb; |
| tL2C_CCB *p_ccb = NULL; |
| UINT16 l2cap_len, rcv_cid, psm; |
| UINT16 credit; |
| |
| /* Extract the handle */ |
| STREAM_TO_UINT16 (handle, p); |
| pkt_type = HCID_GET_EVENT (handle); |
| handle = HCID_GET_HANDLE (handle); |
| |
| /* Since the HCI Transport is putting segmented packets back together, we */ |
| /* should never get a valid packet with the type set to "continuation" */ |
| if (pkt_type != L2CAP_PKT_CONTINUE) |
| { |
| /* Find the LCB based on the handle */ |
| if ((p_lcb = l2cu_find_lcb_by_handle (handle)) == NULL) |
| { |
| UINT8 cmd_code; |
| |
| /* There is a slight possibility (specifically with USB) that we get an */ |
| /* L2CAP connection request before we get the HCI connection complete. */ |
| /* So for these types of messages, hold them for up to 2 seconds. */ |
| STREAM_TO_UINT16 (hci_len, p); |
| STREAM_TO_UINT16 (l2cap_len, p); |
| STREAM_TO_UINT16 (rcv_cid, p); |
| STREAM_TO_UINT8 (cmd_code, p); |
| |
| if ((p_msg->layer_specific == 0) && (rcv_cid == L2CAP_SIGNALLING_CID) |
| && (cmd_code == L2CAP_CMD_INFO_REQ || cmd_code == L2CAP_CMD_CONN_REQ)) { |
| L2CAP_TRACE_WARNING ("L2CAP - holding ACL for unknown handle:%d ls:%d" |
| " cid:%d opcode:%d cur count:%d", handle, p_msg->layer_specific, |
| rcv_cid, cmd_code, list_length(l2cb.rcv_pending_q)); |
| p_msg->layer_specific = 2; |
| list_append(l2cb.rcv_pending_q, p_msg); |
| |
| if (list_length(l2cb.rcv_pending_q) == 1) { |
| alarm_set_on_queue(l2cb.receive_hold_timer, |
| BT_1SEC_TIMEOUT_MS, |
| l2c_receive_hold_timer_timeout, NULL, |
| btu_general_alarm_queue); |
| } |
| |
| return; |
| } else { |
| L2CAP_TRACE_ERROR ("L2CAP - rcvd ACL for unknown handle:%d ls:%d cid:%d" |
| " opcode:%d cur count:%d", handle, p_msg->layer_specific, rcv_cid, |
| cmd_code, list_length(l2cb.rcv_pending_q)); |
| } |
| osi_free(p_msg); |
| return; |
| } |
| } |
| else |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - expected pkt start or complete, got: %d", pkt_type); |
| osi_free(p_msg); |
| return; |
| } |
| |
| /* Extract the length and update the buffer header */ |
| STREAM_TO_UINT16 (hci_len, p); |
| p_msg->offset += 4; |
| |
| /* Extract the length and CID */ |
| STREAM_TO_UINT16 (l2cap_len, p); |
| STREAM_TO_UINT16 (rcv_cid, p); |
| |
| #if BLE_INCLUDED == TRUE |
| /* for BLE channel, always notify connection when ACL data received on the link */ |
| if (p_lcb && p_lcb->transport == BT_TRANSPORT_LE && p_lcb->link_state != LST_DISCONNECTING) |
| /* only process fixed channel data as channel open indication when link is not in disconnecting mode */ |
| l2cble_notify_le_connection(p_lcb->remote_bd_addr); |
| #endif |
| |
| /* Find the CCB for this CID */ |
| if (rcv_cid >= L2CAP_BASE_APPL_CID) |
| { |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, rcv_cid)) == NULL) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - unknown CID: 0x%04x", rcv_cid); |
| osi_free(p_msg); |
| return; |
| } |
| } |
| |
| if (hci_len >= L2CAP_PKT_OVERHEAD) /* Must receive at least the L2CAP length and CID.*/ |
| { |
| p_msg->len = hci_len - L2CAP_PKT_OVERHEAD; |
| p_msg->offset += L2CAP_PKT_OVERHEAD; |
| } |
| else |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - got incorrect hci header" ); |
| osi_free(p_msg); |
| return; |
| } |
| |
| if (l2cap_len != p_msg->len) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - bad length in pkt. Exp: %d Act: %d", |
| l2cap_len, p_msg->len); |
| |
| osi_free(p_msg); |
| return; |
| } |
| |
| /* Send the data through the channel state machine */ |
| if (rcv_cid == L2CAP_SIGNALLING_CID) |
| { |
| process_l2cap_cmd (p_lcb, p, l2cap_len); |
| osi_free(p_msg); |
| } |
| else if (rcv_cid == L2CAP_CONNECTIONLESS_CID) |
| { |
| /* process_connectionless_data (p_lcb); */ |
| STREAM_TO_UINT16 (psm, p); |
| L2CAP_TRACE_DEBUG( "GOT CONNECTIONLESS DATA PSM:%d", psm ) ; |
| |
| #if (L2CAP_UCD_INCLUDED == TRUE) |
| /* if it is not broadcast, check UCD registration */ |
| if ( l2c_ucd_check_rx_pkts( p_lcb, p_msg ) ) |
| { |
| /* nothing to do */ |
| } |
| else |
| #endif |
| osi_free(p_msg); |
| } |
| #if (BLE_INCLUDED == TRUE) |
| else if (rcv_cid == L2CAP_BLE_SIGNALLING_CID) |
| { |
| l2cble_process_sig_cmd (p_lcb, p, l2cap_len); |
| osi_free(p_msg); |
| } |
| #endif |
| #if (L2CAP_NUM_FIXED_CHNLS > 0) |
| else if ((rcv_cid >= L2CAP_FIRST_FIXED_CHNL) && (rcv_cid <= L2CAP_LAST_FIXED_CHNL) && |
| (l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb != NULL) ) |
| { |
| /* If no CCB for this channel, allocate one */ |
| if (p_lcb && |
| /* only process fixed channel data when link is open or wait for data indication */ |
| (p_lcb->link_state != LST_DISCONNECTING) && |
| l2cu_initialize_fixed_ccb (p_lcb, rcv_cid, &l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) |
| { |
| p_ccb = p_lcb->p_fixed_ccbs[rcv_cid - L2CAP_FIRST_FIXED_CHNL]; |
| |
| if (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_BASIC_MODE) |
| l2c_fcr_proc_pdu (p_ccb, p_msg); |
| else |
| (*l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb) |
| (rcv_cid, p_lcb->remote_bd_addr, p_msg); |
| } |
| else |
| osi_free(p_msg); |
| } |
| #endif |
| |
| else |
| { |
| if (p_ccb == NULL) |
| osi_free(p_msg); |
| else |
| { |
| if (p_lcb->transport == BT_TRANSPORT_LE) |
| { |
| l2c_lcc_proc_pdu(p_ccb,p_msg); |
| // Got a pkt, valid send out credits to the peer device |
| credit = L2CAP_LE_DEFAULT_CREDIT; |
| l2c_csm_execute(p_ccb, L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT, &credit); |
| } |
| else |
| { |
| /* Basic mode packets go straight to the state machine */ |
| if (p_ccb->peer_cfg.fcr.mode == L2CAP_FCR_BASIC_MODE) |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DATA, p_msg); |
| else |
| { |
| /* eRTM or streaming mode, so we need to validate states first */ |
| if ((p_ccb->chnl_state == CST_OPEN) || (p_ccb->chnl_state == CST_CONFIG)) |
| l2c_fcr_proc_pdu (p_ccb, p_msg); |
| else |
| osi_free (p_msg); |
| } |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function process_l2cap_cmd |
| ** |
| ** Description This function is called when a packet is received on the |
| ** L2CAP signalling CID |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| static void process_l2cap_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len) |
| { |
| UINT8 *p_pkt_end, *p_next_cmd, *p_cfg_end, *p_cfg_start; |
| UINT8 cmd_code, cfg_code, cfg_len, id; |
| tL2C_CONN_INFO con_info; |
| tL2CAP_CFG_INFO cfg_info; |
| UINT16 rej_reason, rej_mtu, lcid, rcid, info_type; |
| tL2C_CCB *p_ccb; |
| tL2C_RCB *p_rcb; |
| BOOLEAN cfg_rej, pkt_size_rej = FALSE; |
| UINT16 cfg_rej_len, cmd_len; |
| UINT16 result; |
| tL2C_CONN_INFO ci; |
| |
| #if (defined BLE_INCLUDED && BLE_INCLUDED == TRUE) |
| /* if l2cap command received in CID 1 on top of an LE link, ignore this command */ |
| if (p_lcb->transport == BT_TRANSPORT_LE) |
| return; |
| #endif |
| |
| /* Reject the packet if it exceeds the default Signalling Channel MTU */ |
| if (pkt_len > L2CAP_DEFAULT_MTU) |
| { |
| /* Core Spec requires a single response to the first command found in a multi-command |
| ** L2cap packet. If only responses in the packet, then it will be ignored. |
| ** Here we simply mark the bad packet and decide which cmd ID to reject later |
| */ |
| pkt_size_rej = TRUE; |
| L2CAP_TRACE_ERROR ("L2CAP SIG MTU Pkt Len Exceeded (672) -> pkt_len: %d", pkt_len); |
| } |
| |
| p_next_cmd = p; |
| p_pkt_end = p + pkt_len; |
| |
| memset (&cfg_info, 0, sizeof(cfg_info)); |
| |
| /* An L2CAP packet may contain multiple commands */ |
| while (TRUE) |
| { |
| /* Smallest command is 4 bytes */ |
| if ((p = p_next_cmd) > (p_pkt_end - 4)) |
| break; |
| |
| STREAM_TO_UINT8 (cmd_code, p); |
| STREAM_TO_UINT8 (id, p); |
| STREAM_TO_UINT16 (cmd_len, p); |
| |
| /* Check command length does not exceed packet length */ |
| if ((p_next_cmd = p + cmd_len) > p_pkt_end) |
| { |
| L2CAP_TRACE_WARNING ("Command len bad pkt_len: %d cmd_len: %d code: %d", |
| pkt_len, cmd_len, cmd_code); |
| break; |
| } |
| |
| L2CAP_TRACE_DEBUG ("cmd_code: %d, id:%d, cmd_len:%d", cmd_code, id, cmd_len); |
| |
| /* Bad L2CAP packet length, look or cmd to reject */ |
| if (pkt_size_rej) |
| { |
| /* If command found rejected it and we're done, otherwise keep looking */ |
| if (l2c_is_cmd_rejected(cmd_code, id, p_lcb)) |
| return; |
| else |
| continue; /* Look for next cmd/response in current packet */ |
| } |
| |
| switch (cmd_code) |
| { |
| case L2CAP_CMD_REJECT: |
| STREAM_TO_UINT16 (rej_reason, p); |
| if (rej_reason == L2CAP_CMD_REJ_MTU_EXCEEDED) |
| { |
| STREAM_TO_UINT16 (rej_mtu, p); |
| /* What to do with the MTU reject ? We have negotiated an MTU. For now */ |
| /* we will ignore it and let a higher protocol timeout take care of it */ |
| |
| L2CAP_TRACE_WARNING ("L2CAP - MTU rej Handle: %d MTU: %d", p_lcb->handle, rej_mtu); |
| } |
| if (rej_reason == L2CAP_CMD_REJ_INVALID_CID) |
| { |
| STREAM_TO_UINT16 (rcid, p); |
| STREAM_TO_UINT16 (lcid, p); |
| |
| L2CAP_TRACE_WARNING ("L2CAP - rej with CID invalid, LCID: 0x%04x RCID: 0x%04x", lcid, rcid); |
| |
| /* Remote CID invalid. Treat as a disconnect */ |
| if (((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| && (p_ccb->remote_cid == rcid)) |
| { |
| /* Fake link disconnect - no reply is generated */ |
| l2c_csm_execute (p_ccb, L2CEVT_LP_DISCONNECT_IND, NULL); |
| } |
| } |
| |
| /* SonyEricsson Info request Bug workaround (Continue connection) */ |
| else if (rej_reason == L2CAP_CMD_REJ_NOT_UNDERSTOOD && p_lcb->w4_info_rsp) |
| { |
| alarm_cancel(p_lcb->info_resp_timer); |
| |
| p_lcb->w4_info_rsp = FALSE; |
| ci.status = HCI_SUCCESS; |
| memcpy (ci.bd_addr, p_lcb->remote_bd_addr, sizeof(BD_ADDR)); |
| |
| /* For all channels, send the event through their FSMs */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb) |
| { |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_INFO_RSP, &ci); |
| } |
| } |
| break; |
| |
| case L2CAP_CMD_CONN_REQ: |
| STREAM_TO_UINT16 (con_info.psm, p); |
| STREAM_TO_UINT16 (rcid, p); |
| if ((p_rcb = l2cu_find_rcb_by_psm (con_info.psm)) == NULL) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for unknown PSM: %d", con_info.psm); |
| l2cu_reject_connection (p_lcb, rcid, id, L2CAP_CONN_NO_PSM); |
| break; |
| } |
| else |
| { |
| if (!p_rcb->api.pL2CA_ConnectInd_Cb) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for outgoing-only connection PSM: %d", con_info.psm); |
| l2cu_reject_connection (p_lcb, rcid, id, L2CAP_CONN_NO_PSM); |
| break; |
| } |
| } |
| if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL) |
| { |
| L2CAP_TRACE_ERROR ("L2CAP - unable to allocate CCB"); |
| l2cu_reject_connection (p_lcb, rcid, id, L2CAP_CONN_NO_RESOURCES); |
| break; |
| } |
| p_ccb->remote_id = id; |
| p_ccb->p_rcb = p_rcb; |
| p_ccb->remote_cid = rcid; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_REQ, &con_info); |
| break; |
| |
| case L2CAP_CMD_CONN_RSP: |
| STREAM_TO_UINT16 (con_info.remote_cid, p); |
| STREAM_TO_UINT16 (lcid, p); |
| STREAM_TO_UINT16 (con_info.l2cap_result, p); |
| STREAM_TO_UINT16 (con_info.l2cap_status, p); |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) == NULL) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - no CCB for conn rsp, LCID: %d RCID: %d", |
| lcid, con_info.remote_cid); |
| break; |
| } |
| if (p_ccb->local_id != id) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - con rsp - bad ID. Exp: %d Got: %d", |
| p_ccb->local_id, id); |
| break; |
| } |
| |
| if (con_info.l2cap_result == L2CAP_CONN_OK) |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP, &con_info); |
| else if (con_info.l2cap_result == L2CAP_CONN_PENDING) |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_PND, &con_info); |
| else |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info); |
| |
| break; |
| |
| case L2CAP_CMD_CONFIG_REQ: |
| p_cfg_end = p + cmd_len; |
| cfg_rej = FALSE; |
| cfg_rej_len = 0; |
| |
| STREAM_TO_UINT16 (lcid, p); |
| STREAM_TO_UINT16 (cfg_info.flags, p); |
| |
| p_cfg_start = p; |
| |
| cfg_info.flush_to_present = cfg_info.mtu_present = cfg_info.qos_present = |
| cfg_info.fcr_present = cfg_info.fcs_present = FALSE; |
| |
| while (p < p_cfg_end) |
| { |
| STREAM_TO_UINT8 (cfg_code, p); |
| STREAM_TO_UINT8 (cfg_len, p); |
| |
| switch (cfg_code & 0x7F) |
| { |
| case L2CAP_CFG_TYPE_MTU: |
| cfg_info.mtu_present = TRUE; |
| STREAM_TO_UINT16 (cfg_info.mtu, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_FLUSH_TOUT: |
| cfg_info.flush_to_present = TRUE; |
| STREAM_TO_UINT16 (cfg_info.flush_to, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_QOS: |
| cfg_info.qos_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.qos.qos_flags, p); |
| STREAM_TO_UINT8 (cfg_info.qos.service_type, p); |
| STREAM_TO_UINT32 (cfg_info.qos.token_rate, p); |
| STREAM_TO_UINT32 (cfg_info.qos.token_bucket_size, p); |
| STREAM_TO_UINT32 (cfg_info.qos.peak_bandwidth, p); |
| STREAM_TO_UINT32 (cfg_info.qos.latency, p); |
| STREAM_TO_UINT32 (cfg_info.qos.delay_variation, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_FCR: |
| cfg_info.fcr_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.fcr.mode, p); |
| STREAM_TO_UINT8 (cfg_info.fcr.tx_win_sz, p); |
| STREAM_TO_UINT8 (cfg_info.fcr.max_transmit, p); |
| STREAM_TO_UINT16 (cfg_info.fcr.rtrans_tout, p); |
| STREAM_TO_UINT16 (cfg_info.fcr.mon_tout, p); |
| STREAM_TO_UINT16 (cfg_info.fcr.mps, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_FCS: |
| cfg_info.fcs_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.fcs, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_EXT_FLOW: |
| cfg_info.ext_flow_spec_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.ext_flow_spec.id, p); |
| STREAM_TO_UINT8 (cfg_info.ext_flow_spec.stype, p); |
| STREAM_TO_UINT16 (cfg_info.ext_flow_spec.max_sdu_size, p); |
| STREAM_TO_UINT32 (cfg_info.ext_flow_spec.sdu_inter_time, p); |
| STREAM_TO_UINT32 (cfg_info.ext_flow_spec.access_latency, p); |
| STREAM_TO_UINT32 (cfg_info.ext_flow_spec.flush_timeout, p); |
| break; |
| |
| default: |
| /* sanity check option length */ |
| if ((cfg_len + L2CAP_CFG_OPTION_OVERHEAD) <= cmd_len) |
| { |
| p += cfg_len; |
| if ((cfg_code & 0x80) == 0) |
| { |
| cfg_rej_len += cfg_len + L2CAP_CFG_OPTION_OVERHEAD; |
| cfg_rej = TRUE; |
| } |
| } |
| /* bad length; force loop exit */ |
| else |
| { |
| p = p_cfg_end; |
| cfg_rej = TRUE; |
| } |
| break; |
| } |
| } |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| { |
| p_ccb->remote_id = id; |
| if (cfg_rej) |
| { |
| l2cu_send_peer_config_rej (p_ccb, p_cfg_start, (UINT16) (cmd_len - L2CAP_CONFIG_REQ_LEN), cfg_rej_len); |
| } |
| else |
| { |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_CONFIG_REQ, &cfg_info); |
| } |
| } |
| else |
| { |
| /* updated spec says send command reject on invalid cid */ |
| l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_INVALID_CID, id, 0, 0); |
| } |
| break; |
| |
| case L2CAP_CMD_CONFIG_RSP: |
| p_cfg_end = p + cmd_len; |
| STREAM_TO_UINT16 (lcid, p); |
| STREAM_TO_UINT16 (cfg_info.flags, p); |
| STREAM_TO_UINT16 (cfg_info.result, p); |
| |
| cfg_info.flush_to_present = cfg_info.mtu_present = cfg_info.qos_present = |
| cfg_info.fcr_present = cfg_info.fcs_present = FALSE; |
| |
| while (p < p_cfg_end) |
| { |
| STREAM_TO_UINT8 (cfg_code, p); |
| STREAM_TO_UINT8 (cfg_len, p); |
| |
| switch (cfg_code & 0x7F) |
| { |
| case L2CAP_CFG_TYPE_MTU: |
| cfg_info.mtu_present = TRUE; |
| STREAM_TO_UINT16 (cfg_info.mtu, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_FLUSH_TOUT: |
| cfg_info.flush_to_present = TRUE; |
| STREAM_TO_UINT16 (cfg_info.flush_to, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_QOS: |
| cfg_info.qos_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.qos.qos_flags, p); |
| STREAM_TO_UINT8 (cfg_info.qos.service_type, p); |
| STREAM_TO_UINT32 (cfg_info.qos.token_rate, p); |
| STREAM_TO_UINT32 (cfg_info.qos.token_bucket_size, p); |
| STREAM_TO_UINT32 (cfg_info.qos.peak_bandwidth, p); |
| STREAM_TO_UINT32 (cfg_info.qos.latency, p); |
| STREAM_TO_UINT32 (cfg_info.qos.delay_variation, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_FCR: |
| cfg_info.fcr_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.fcr.mode, p); |
| STREAM_TO_UINT8 (cfg_info.fcr.tx_win_sz, p); |
| STREAM_TO_UINT8 (cfg_info.fcr.max_transmit, p); |
| STREAM_TO_UINT16 (cfg_info.fcr.rtrans_tout, p); |
| STREAM_TO_UINT16 (cfg_info.fcr.mon_tout, p); |
| STREAM_TO_UINT16 (cfg_info.fcr.mps, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_FCS: |
| cfg_info.fcs_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.fcs, p); |
| break; |
| |
| case L2CAP_CFG_TYPE_EXT_FLOW: |
| cfg_info.ext_flow_spec_present = TRUE; |
| STREAM_TO_UINT8 (cfg_info.ext_flow_spec.id, p); |
| STREAM_TO_UINT8 (cfg_info.ext_flow_spec.stype, p); |
| STREAM_TO_UINT16 (cfg_info.ext_flow_spec.max_sdu_size, p); |
| STREAM_TO_UINT32 (cfg_info.ext_flow_spec.sdu_inter_time, p); |
| STREAM_TO_UINT32 (cfg_info.ext_flow_spec.access_latency, p); |
| STREAM_TO_UINT32 (cfg_info.ext_flow_spec.flush_timeout, p); |
| break; |
| } |
| } |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| { |
| if (p_ccb->local_id != id) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - cfg rsp - bad ID. Exp: %d Got: %d", |
| p_ccb->local_id, id); |
| break; |
| } |
| if ( (cfg_info.result == L2CAP_CFG_OK) || (cfg_info.result == L2CAP_CFG_PENDING) ) |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_CONFIG_RSP, &cfg_info); |
| else |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_CONFIG_RSP_NEG, &cfg_info); |
| } |
| else |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - rcvd cfg rsp for unknown CID: 0x%04x", lcid); |
| } |
| break; |
| |
| case L2CAP_CMD_DISC_REQ: |
| STREAM_TO_UINT16 (lcid, p); |
| STREAM_TO_UINT16 (rcid, p); |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| { |
| if (p_ccb->remote_cid == rcid) |
| { |
| p_ccb->remote_id = id; |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_REQ, &con_info); |
| } |
| } |
| else |
| l2cu_send_peer_disc_rsp (p_lcb, id, lcid, rcid); |
| |
| break; |
| |
| case L2CAP_CMD_DISC_RSP: |
| STREAM_TO_UINT16 (rcid, p); |
| STREAM_TO_UINT16 (lcid, p); |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| { |
| if ((p_ccb->remote_cid == rcid) && (p_ccb->local_id == id)) |
| { |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_RSP, &con_info); |
| } |
| } |
| break; |
| |
| case L2CAP_CMD_ECHO_REQ: |
| l2cu_send_peer_echo_rsp (p_lcb, id, NULL, 0); |
| break; |
| |
| case L2CAP_CMD_ECHO_RSP: |
| if (p_lcb->p_echo_rsp_cb) |
| { |
| tL2CA_ECHO_RSP_CB *p_cb = p_lcb->p_echo_rsp_cb; |
| |
| /* Zero out the callback in case app immediately calls us again */ |
| p_lcb->p_echo_rsp_cb = NULL; |
| |
| (*p_cb) (L2CAP_PING_RESULT_OK); |
| } |
| break; |
| |
| case L2CAP_CMD_INFO_REQ: |
| STREAM_TO_UINT16 (info_type, p); |
| l2cu_send_peer_info_rsp (p_lcb, id, info_type); |
| break; |
| |
| case L2CAP_CMD_INFO_RSP: |
| /* Stop the link connect timer if sent before L2CAP connection is up */ |
| if (p_lcb->w4_info_rsp) |
| { |
| alarm_cancel(p_lcb->info_resp_timer); |
| p_lcb->w4_info_rsp = FALSE; |
| } |
| |
| STREAM_TO_UINT16 (info_type, p); |
| STREAM_TO_UINT16 (result, p); |
| |
| p_lcb->info_rx_bits |= (1 << info_type); |
| |
| if ( (info_type == L2CAP_EXTENDED_FEATURES_INFO_TYPE) |
| && (result == L2CAP_INFO_RESP_RESULT_SUCCESS) ) |
| { |
| STREAM_TO_UINT32( p_lcb->peer_ext_fea, p ); |
| |
| #if (L2CAP_NUM_FIXED_CHNLS > 0) |
| if (p_lcb->peer_ext_fea & L2CAP_EXTFEA_FIXED_CHNLS) |
| { |
| l2cu_send_peer_info_req (p_lcb, L2CAP_FIXED_CHANNELS_INFO_TYPE); |
| break; |
| } |
| else |
| { |
| l2cu_process_fixed_chnl_resp (p_lcb); |
| } |
| #endif |
| } |
| |
| #if (L2CAP_NUM_FIXED_CHNLS > 0) |
| if (info_type == L2CAP_FIXED_CHANNELS_INFO_TYPE) |
| { |
| if (result == L2CAP_INFO_RESP_RESULT_SUCCESS) |
| { |
| memcpy (p_lcb->peer_chnl_mask, p, L2CAP_FIXED_CHNL_ARRAY_SIZE); |
| } |
| |
| l2cu_process_fixed_chnl_resp (p_lcb); |
| } |
| #endif |
| #if (L2CAP_UCD_INCLUDED == TRUE) |
| else if (info_type == L2CAP_CONNLESS_MTU_INFO_TYPE) |
| { |
| if (result == L2CAP_INFO_RESP_RESULT_SUCCESS) |
| { |
| STREAM_TO_UINT16 (p_lcb->ucd_mtu, p); |
| } |
| } |
| #endif |
| |
| ci.status = HCI_SUCCESS; |
| memcpy (ci.bd_addr, p_lcb->remote_bd_addr, sizeof(BD_ADDR)); |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb) |
| { |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_INFO_RSP, &ci); |
| } |
| break; |
| |
| default: |
| L2CAP_TRACE_WARNING ("L2CAP - bad cmd code: %d", cmd_code); |
| l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); |
| return; |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2c_process_held_packets |
| ** |
| ** Description This function processes any L2CAP packets that arrived before |
| ** the HCI connection complete arrived. It is a work around for |
| ** badly behaved controllers. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2c_process_held_packets(BOOLEAN timed_out) { |
| if (list_is_empty(l2cb.rcv_pending_q)) |
| return; |
| |
| if (!timed_out) { |
| alarm_cancel(l2cb.receive_hold_timer); |
| L2CAP_TRACE_WARNING("L2CAP HOLD CONTINUE"); |
| } else { |
| L2CAP_TRACE_WARNING("L2CAP HOLD TIMEOUT"); |
| } |
| |
| for (const list_node_t *node = list_begin(l2cb.rcv_pending_q); |
| node != list_end(l2cb.rcv_pending_q);) { |
| BT_HDR *p_buf = list_node(node); |
| node = list_next(node); |
| if (!timed_out || (!p_buf->layer_specific) || (--p_buf->layer_specific == 0)) { |
| list_remove(l2cb.rcv_pending_q, p_buf); |
| p_buf->layer_specific = 0xFFFF; |
| l2c_rcv_acl_data(p_buf); |
| } |
| } |
| |
| /* If anyone still in the queue, restart the timeout */ |
| if (!list_is_empty(l2cb.rcv_pending_q)) { |
| alarm_set_on_queue(l2cb.receive_hold_timer, BT_1SEC_TIMEOUT_MS, |
| l2c_receive_hold_timer_timeout, NULL, |
| btu_general_alarm_queue); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2c_init |
| ** |
| ** Description This function is called once at startup to initialize |
| ** all the L2CAP structures |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2c_init (void) |
| { |
| INT16 xx; |
| |
| memset (&l2cb, 0, sizeof (tL2C_CB)); |
| /* the psm is increased by 2 before being used */ |
| l2cb.dyn_psm = 0xFFF; |
| |
| /* Put all the channel control blocks on the free queue */ |
| for (xx = 0; xx < MAX_L2CAP_CHANNELS - 1; xx++) |
| { |
| l2cb.ccb_pool[xx].p_next_ccb = &l2cb.ccb_pool[xx + 1]; |
| } |
| |
| #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) |
| /* it will be set to L2CAP_PKT_START_NON_FLUSHABLE if controller supports */ |
| l2cb.non_flushable_pbf = L2CAP_PKT_START << L2CAP_PKT_TYPE_SHIFT; |
| #endif |
| |
| l2cb.p_free_ccb_first = &l2cb.ccb_pool[0]; |
| l2cb.p_free_ccb_last = &l2cb.ccb_pool[MAX_L2CAP_CHANNELS - 1]; |
| |
| #ifdef L2CAP_DESIRED_LINK_ROLE |
| l2cb.desire_role = L2CAP_DESIRED_LINK_ROLE; |
| #else |
| l2cb.desire_role = HCI_ROLE_SLAVE; |
| #endif |
| |
| /* Set the default idle timeout */ |
| l2cb.idle_timeout = L2CAP_LINK_INACTIVITY_TOUT; |
| |
| #if defined(L2CAP_INITIAL_TRACE_LEVEL) |
| l2cb.l2cap_trace_level = L2CAP_INITIAL_TRACE_LEVEL; |
| #else |
| l2cb.l2cap_trace_level = BT_TRACE_LEVEL_NONE; /* No traces */ |
| #endif |
| |
| #if L2CAP_CONFORMANCE_TESTING == TRUE |
| /* Conformance testing needs a dynamic response */ |
| l2cb.test_info_resp = L2CAP_EXTFEA_SUPPORTED_MASK; |
| #endif |
| |
| /* Number of ACL buffers to use for high priority channel */ |
| #if (defined(L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE) && (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == TRUE)) |
| l2cb.high_pri_min_xmit_quota = L2CAP_HIGH_PRI_MIN_XMIT_QUOTA; |
| #endif |
| |
| #if BLE_INCLUDED == TRUE |
| l2cb.l2c_ble_fixed_chnls_mask = |
| L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT; |
| #endif |
| |
| l2cb.rcv_pending_q = list_new(NULL); |
| if (l2cb.rcv_pending_q == NULL) |
| LOG_ERROR(LOG_TAG, "%s unable to allocate memory for link layer control block", __func__); |
| l2cb.receive_hold_timer = alarm_new("l2c.receive_hold_timer"); |
| } |
| |
| void l2c_free(void) { |
| list_free(l2cb.rcv_pending_q); |
| l2cb.rcv_pending_q = NULL; |
| } |
| |
| void l2c_receive_hold_timer_timeout(UNUSED_ATTR void *data) |
| { |
| /* Update the timeouts in the hold queue */ |
| l2c_process_held_packets(TRUE); |
| } |
| |
| void l2c_ccb_timer_timeout(void *data) |
| { |
| tL2C_CCB *p_ccb = (tL2C_CCB *)data; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_TIMEOUT, NULL); |
| } |
| |
| void l2c_fcrb_ack_timer_timeout(void *data) |
| { |
| tL2C_CCB *p_ccb = (tL2C_CCB *)data; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_ACK_TIMEOUT, NULL); |
| } |
| |
| void l2c_lcb_timer_timeout(void *data) |
| { |
| tL2C_LCB *p_lcb = (tL2C_LCB *)data; |
| |
| l2c_link_timeout(p_lcb); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2c_data_write |
| ** |
| ** Description API functions call this function to write data. |
| ** |
| ** Returns L2CAP_DW_SUCCESS, if data accepted, else FALSE |
| ** L2CAP_DW_CONGESTED, if data accepted and the channel is congested |
| ** L2CAP_DW_FAILED, if error |
| ** |
| *******************************************************************************/ |
| UINT8 l2c_data_write (UINT16 cid, BT_HDR *p_data, UINT16 flags) |
| { |
| tL2C_CCB *p_ccb; |
| |
| /* Find the channel control block. We don't know the link it is on. */ |
| if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_DataWrite, CID: %d", cid); |
| osi_free(p_data); |
| return (L2CAP_DW_FAILED); |
| } |
| |
| #ifndef TESTER /* Tester may send any amount of data. otherwise sending message |
| bigger than mtu size of peer is a violation of protocol */ |
| UINT16 mtu; |
| |
| if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) |
| mtu = p_ccb->peer_conn_cfg.mtu; |
| else |
| mtu = p_ccb->peer_cfg.mtu; |
| |
| if (p_data->len > mtu) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - CID: 0x%04x cannot send message bigger than peer's mtu size", cid); |
| osi_free(p_data); |
| return (L2CAP_DW_FAILED); |
| } |
| #endif |
| |
| /* channel based, packet based flushable or non-flushable */ |
| p_data->layer_specific = flags; |
| |
| /* If already congested, do not accept any more packets */ |
| if (p_ccb->cong_sent) |
| { |
| L2CAP_TRACE_ERROR ("L2CAP - CID: 0x%04x cannot send, already congested xmit_hold_q.count: %u buff_quota: %u", |
| p_ccb->local_cid, |
| fixed_queue_length(p_ccb->xmit_hold_q), |
| p_ccb->buff_quota); |
| |
| osi_free(p_data); |
| return (L2CAP_DW_FAILED); |
| } |
| |
| |
| l2c_csm_execute (p_ccb, L2CEVT_L2CA_DATA_WRITE, p_data); |
| |
| if (p_ccb->cong_sent) |
| return (L2CAP_DW_CONGESTED); |
| |
| return (L2CAP_DW_SUCCESS); |
| } |
| |
