| /****************************************************************************** |
| * |
| * Copyright (C) 2010-2012 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 LLCP utilities |
| * |
| ******************************************************************************/ |
| |
| #include <string.h> |
| #include "gki.h" |
| #include "nfc_target.h" |
| #include "bt_types.h" |
| #include "trace_api.h" |
| #include "llcp_int.h" |
| #include "llcp_defs.h" |
| #include "nfc_int.h" |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_parse_link_params |
| ** |
| ** Description Parse LLCP Link parameters |
| ** |
| ** Returns TRUE if success |
| ** |
| *******************************************************************************/ |
| BOOLEAN llcp_util_parse_link_params (UINT16 length, UINT8 *p_bytes) |
| { |
| UINT8 param_type, param_len, *p = p_bytes; |
| |
| while (length) |
| { |
| BE_STREAM_TO_UINT8 (param_type, p); |
| length--; |
| |
| switch (param_type) |
| { |
| case LLCP_VERSION_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT8 (llcp_cb.lcb.peer_version, p); |
| LLCP_TRACE_DEBUG1 ("Peer Version - 0x%02X", llcp_cb.lcb.peer_version); |
| break; |
| |
| case LLCP_MIUX_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT16 (llcp_cb.lcb.peer_miu, p); |
| llcp_cb.lcb.peer_miu &= LLCP_MIUX_MASK; |
| llcp_cb.lcb.peer_miu += LLCP_DEFAULT_MIU; |
| LLCP_TRACE_DEBUG1 ("Peer MIU - %d bytes", llcp_cb.lcb.peer_miu); |
| break; |
| |
| case LLCP_WKS_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT16 (llcp_cb.lcb.peer_wks, p); |
| LLCP_TRACE_DEBUG1 ("Peer WKS - 0x%04X", llcp_cb.lcb.peer_wks); |
| break; |
| |
| case LLCP_LTO_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT8 (llcp_cb.lcb.peer_lto, p); |
| llcp_cb.lcb.peer_lto *= LLCP_LTO_UNIT; /* 10ms unit */ |
| LLCP_TRACE_DEBUG1 ("Peer LTO - %d ms", llcp_cb.lcb.peer_lto); |
| break; |
| |
| case LLCP_OPT_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT8 (llcp_cb.lcb.peer_opt, p); |
| LLCP_TRACE_DEBUG1 ("Peer OPT - 0x%02X", llcp_cb.lcb.peer_opt); |
| break; |
| |
| default: |
| LLCP_TRACE_ERROR1 ("llcp_util_parse_link_params (): Unexpected type 0x%x", param_type); |
| BE_STREAM_TO_UINT8 (param_len, p); |
| p += param_len; |
| break; |
| } |
| |
| if (length >= param_len + 1) |
| length -= param_len + 1; |
| else |
| { |
| LLCP_TRACE_ERROR0 ("llcp_util_parse_link_params (): Bad LTV's"); |
| return (FALSE); |
| } |
| } |
| return (TRUE); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_adjust_ll_congestion |
| ** |
| ** Description adjust tx/rx congestion thresholds on logical link |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_adjust_ll_congestion (void) |
| { |
| /* buffer quota is allocated equally for each logical data link */ |
| if (llcp_cb.num_logical_data_link) |
| { |
| llcp_cb.ll_tx_congest_start = llcp_cb.max_num_ll_tx_buff / llcp_cb.num_logical_data_link; |
| llcp_cb.ll_rx_congest_start = llcp_cb.max_num_ll_rx_buff / llcp_cb.num_logical_data_link; |
| } |
| else |
| { |
| llcp_cb.ll_tx_congest_start = llcp_cb.max_num_ll_tx_buff; |
| llcp_cb.ll_rx_congest_start = llcp_cb.max_num_ll_rx_buff; |
| } |
| |
| /* at least one for each logical data link */ |
| if (llcp_cb.ll_tx_congest_start == 0) |
| { |
| llcp_cb.ll_tx_congest_start = 1; |
| } |
| if (llcp_cb.ll_rx_congest_start == 0) |
| { |
| llcp_cb.ll_rx_congest_start = 1; |
| } |
| |
| if (llcp_cb.ll_tx_congest_start > 1) |
| { |
| llcp_cb.ll_tx_congest_end = 1; |
| } |
| else |
| { |
| llcp_cb.ll_tx_congest_end = 0; |
| } |
| |
| LLCP_TRACE_DEBUG4 ("num_logical_data_link=%d, ll_tx_congest_start=%d, ll_tx_congest_end=%d, ll_rx_congest_start=%d", |
| llcp_cb.num_logical_data_link, |
| llcp_cb.ll_tx_congest_start, |
| llcp_cb.ll_tx_congest_end, |
| llcp_cb.ll_rx_congest_start); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_adjust_dl_rx_congestion |
| ** |
| ** Description adjust rx congestion thresholds on data link |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_adjust_dl_rx_congestion (void) |
| { |
| UINT8 idx, rx_congest_start; |
| |
| if (llcp_cb.num_data_link_connection) |
| { |
| rx_congest_start = llcp_cb.num_rx_buff / llcp_cb.num_data_link_connection; |
| |
| for (idx = 0; idx < LLCP_MAX_DATA_LINK; idx++) |
| { |
| if (llcp_cb.dlcb[idx].state == LLCP_DLC_STATE_CONNECTED) |
| { |
| if (rx_congest_start > llcp_cb.dlcb[idx].local_rw) |
| { |
| /* |
| ** set rx congestion threshold LLCP_DL_MIN_RX_CONGEST at least |
| ** so, we don't need to flow off too often. |
| */ |
| if (llcp_cb.dlcb[idx].local_rw + 1 > LLCP_DL_MIN_RX_CONGEST) |
| llcp_cb.dlcb[idx].rx_congest_threshold = llcp_cb.dlcb[idx].local_rw + 1; |
| else |
| llcp_cb.dlcb[idx].rx_congest_threshold = LLCP_DL_MIN_RX_CONGEST; |
| } |
| else |
| { |
| llcp_cb.dlcb[idx].rx_congest_threshold = LLCP_DL_MIN_RX_CONGEST; |
| } |
| |
| LLCP_TRACE_DEBUG3 ("DLC[%d], local_rw=%d, rx_congest_threshold=%d", |
| idx, |
| llcp_cb.dlcb[idx].local_rw, |
| llcp_cb.dlcb[idx].rx_congest_threshold); |
| } |
| } |
| } |
| |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_check_rx_congested_status |
| ** |
| ** Description Update rx congested status |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_check_rx_congested_status (void) |
| { |
| UINT8 idx; |
| |
| if (llcp_cb.overall_rx_congested) |
| { |
| /* check if rx congestion clear */ |
| if (llcp_cb.total_rx_ui_pdu + llcp_cb.total_rx_i_pdu <= llcp_cb.overall_rx_congest_end) |
| { |
| LLCP_TRACE_DEBUG3 ("llcp_util_check_rx_congested_status (): rx link is uncongested, %d+%d <= %d", |
| llcp_cb.total_rx_ui_pdu, llcp_cb.total_rx_i_pdu, |
| llcp_cb.overall_rx_congest_end); |
| |
| llcp_cb.overall_rx_congested = FALSE; |
| |
| for (idx = 0; idx < LLCP_MAX_DATA_LINK; idx++) |
| { |
| /* set flag to clear local busy status on data link connections */ |
| if ( (llcp_cb.dlcb[idx].state == LLCP_DLC_STATE_CONNECTED) |
| &&(llcp_cb.dlcb[idx].is_rx_congested == FALSE) ) |
| { |
| llcp_cb.dlcb[idx].flags |= LLCP_DATA_LINK_FLAG_PENDING_RR_RNR; |
| } |
| } |
| } |
| } |
| else |
| { |
| /* check if rx link is congested */ |
| if (llcp_cb.total_rx_ui_pdu + llcp_cb.total_rx_i_pdu >= llcp_cb.overall_rx_congest_start) |
| { |
| LLCP_TRACE_WARNING3 ("llcp_util_check_rx_congested_status (): rx link is congested, %d+%d >= %d", |
| llcp_cb.total_rx_ui_pdu, llcp_cb.total_rx_i_pdu, |
| llcp_cb.overall_rx_congest_start); |
| |
| llcp_cb.overall_rx_congested = TRUE; |
| |
| /* rx link congestion is started, send RNR to remote end point */ |
| for (idx = 0; idx < LLCP_MAX_DATA_LINK; idx++) |
| { |
| if ( (llcp_cb.dlcb[idx].state == LLCP_DLC_STATE_CONNECTED) |
| &&(llcp_cb.dlcb[idx].is_rx_congested == FALSE) ) |
| { |
| llcp_cb.dlcb[idx].flags |= LLCP_DATA_LINK_FLAG_PENDING_RR_RNR; |
| } |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_ui |
| ** |
| ** Description Send UI PDU |
| ** |
| ** Returns tLLCP_STATUS |
| ** |
| *******************************************************************************/ |
| tLLCP_STATUS llcp_util_send_ui (UINT8 ssap, UINT8 dsap, tLLCP_APP_CB *p_app_cb, BT_HDR *p_msg) |
| { |
| UINT8 *p; |
| tLLCP_STATUS status = LLCP_STATUS_SUCCESS; |
| |
| p_msg->offset -= LLCP_PDU_HEADER_SIZE; |
| p_msg->len += LLCP_PDU_HEADER_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (dsap, LLCP_PDU_UI_TYPE, ssap)); |
| |
| GKI_enqueue (&p_app_cb->ui_xmit_q, p_msg); |
| llcp_cb.total_tx_ui_pdu++; |
| |
| llcp_link_check_send_data (); |
| |
| if ( (p_app_cb->is_ui_tx_congested) |
| ||(p_app_cb->ui_xmit_q.count >= llcp_cb.ll_tx_congest_start) |
| ||(llcp_cb.overall_tx_congested) |
| ||(llcp_cb.total_tx_ui_pdu >= llcp_cb.max_num_ll_tx_buff) ) |
| { |
| /* set congested here so overall congestion check routine will not report event again, */ |
| /* or notify uncongestion later */ |
| p_app_cb->is_ui_tx_congested = TRUE; |
| |
| LLCP_TRACE_WARNING2 ("Logical link (SAP=0x%X) congested: ui_xmit_q.count=%d", |
| ssap, p_app_cb->ui_xmit_q.count); |
| |
| status = LLCP_STATUS_CONGESTED; |
| } |
| |
| return status; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_disc |
| ** |
| ** Description Send DISC PDU |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_send_disc (UINT8 dsap, UINT8 ssap) |
| { |
| BT_HDR *p_msg; |
| UINT8 *p; |
| |
| p_msg = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID); |
| |
| if (p_msg) |
| { |
| p_msg->len = LLCP_PDU_DISC_SIZE; |
| p_msg->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (dsap, LLCP_PDU_DISC_TYPE, ssap)); |
| |
| GKI_enqueue (&llcp_cb.lcb.sig_xmit_q, p_msg); |
| llcp_link_check_send_data (); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_allocate_data_link |
| ** |
| ** Description Allocate tLLCP_DLCB for data link connection |
| ** |
| ** Returns tLLCP_DLCB * |
| ** |
| ******************************************************************************/ |
| tLLCP_DLCB *llcp_util_allocate_data_link (UINT8 reg_sap, UINT8 remote_sap) |
| { |
| tLLCP_DLCB *p_dlcb = NULL; |
| int idx; |
| |
| LLCP_TRACE_DEBUG2 ("llcp_util_allocate_data_link (): reg_sap = 0x%x, remote_sap = 0x%x", |
| reg_sap, remote_sap); |
| |
| for (idx = 0; idx < LLCP_MAX_DATA_LINK; idx++) |
| { |
| if (llcp_cb.dlcb[idx].state == LLCP_DLC_STATE_IDLE) |
| { |
| p_dlcb = &(llcp_cb.dlcb[idx]); |
| |
| memset (p_dlcb, 0, sizeof (tLLCP_DLCB)); |
| break; |
| } |
| } |
| |
| if (!p_dlcb) |
| { |
| LLCP_TRACE_ERROR0 ("llcp_util_allocate_data_link (): Out of DLCB"); |
| } |
| else |
| { |
| p_dlcb->p_app_cb = llcp_util_get_app_cb (reg_sap); |
| p_dlcb->local_sap = reg_sap; |
| p_dlcb->remote_sap = remote_sap; |
| p_dlcb->timer.param = (TIMER_PARAM_TYPE) p_dlcb; |
| |
| /* this is for inactivity timer and congestion control. */ |
| llcp_cb.num_data_link_connection++; |
| |
| LLCP_TRACE_DEBUG3 ("llcp_util_allocate_data_link (): local_sap = 0x%x, remote_sap = 0x%x, num_data_link_connection = %d", |
| p_dlcb->local_sap, p_dlcb->remote_sap, llcp_cb.num_data_link_connection); |
| } |
| return p_dlcb; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_deallocate_data_link |
| ** |
| ** Description Deallocate tLLCP_DLCB |
| ** |
| ** Returns void |
| ** |
| ******************************************************************************/ |
| void llcp_util_deallocate_data_link (tLLCP_DLCB *p_dlcb) |
| { |
| if (p_dlcb) |
| { |
| LLCP_TRACE_DEBUG1 ("llcp_util_deallocate_data_link (): local_sap = 0x%x", p_dlcb->local_sap); |
| |
| if (p_dlcb->state != LLCP_DLC_STATE_IDLE) |
| { |
| nfc_stop_quick_timer (&p_dlcb->timer); |
| llcp_dlc_flush_q (p_dlcb); |
| |
| p_dlcb->state = LLCP_DLC_STATE_IDLE; |
| |
| if (llcp_cb.num_data_link_connection > 0) |
| { |
| llcp_cb.num_data_link_connection--; |
| } |
| |
| LLCP_TRACE_DEBUG1 ("llcp_util_deallocate_data_link (): num_data_link_connection = %d", llcp_cb.num_data_link_connection); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_connect |
| ** |
| ** Description Send CONNECT PDU |
| ** |
| ** Returns tLLCP_STATUS |
| ** |
| ******************************************************************************/ |
| tLLCP_STATUS llcp_util_send_connect (tLLCP_DLCB *p_dlcb, tLLCP_CONNECTION_PARAMS *p_params) |
| { |
| BT_HDR *p_msg; |
| UINT8 *p; |
| UINT16 miu_len = 0, rw_len = 0, sn_len = 0; |
| |
| if (p_params->miu != LLCP_DEFAULT_MIU) |
| { |
| miu_len = 4; /* TYPE, LEN, 2 bytes MIU */ |
| } |
| if (p_params->rw != LLCP_DEFAULT_RW) |
| { |
| rw_len = 3; /* TYPE, LEN, 1 byte RW */ |
| p_params->rw &= 0x0F; /* only 4 bits */ |
| } |
| if ((strlen (p_params->sn)) && (p_dlcb->remote_sap == LLCP_SAP_SDP)) |
| { |
| sn_len = (UINT16) (2 + strlen (p_params->sn)); /* TYPE, LEN, SN */ |
| } |
| |
| p_msg = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID); |
| |
| if (p_msg) |
| { |
| p_msg->len = LLCP_PDU_HEADER_SIZE + miu_len + rw_len + sn_len; |
| p_msg->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (p_dlcb->remote_sap, LLCP_PDU_CONNECT_TYPE, p_dlcb->local_sap)); |
| |
| if (miu_len) |
| { |
| UINT8_TO_BE_STREAM (p, LLCP_MIUX_TYPE); |
| UINT8_TO_BE_STREAM (p, LLCP_MIUX_LEN); |
| UINT16_TO_BE_STREAM (p, p_params->miu - LLCP_DEFAULT_MIU); |
| } |
| |
| if (rw_len) |
| { |
| UINT8_TO_BE_STREAM (p, LLCP_RW_TYPE); |
| UINT8_TO_BE_STREAM (p, LLCP_RW_LEN); |
| UINT8_TO_BE_STREAM (p, p_params->rw); |
| } |
| |
| if (sn_len) |
| { |
| UINT8_TO_BE_STREAM (p, LLCP_SN_TYPE); |
| UINT8_TO_BE_STREAM (p, sn_len - 2); |
| memcpy (p, p_params->sn, sn_len - 2); |
| } |
| |
| GKI_enqueue (&llcp_cb.lcb.sig_xmit_q, p_msg); |
| llcp_link_check_send_data (); |
| |
| return LLCP_STATUS_SUCCESS; |
| } |
| |
| return LLCP_STATUS_FAIL; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_parse_connect |
| ** |
| ** Description Parse CONNECT PDU |
| ** |
| ** Returns tLLCP_STATUS |
| ** |
| *******************************************************************************/ |
| tLLCP_STATUS llcp_util_parse_connect (UINT8 *p_bytes, UINT16 length, tLLCP_CONNECTION_PARAMS *p_params) |
| { |
| UINT8 param_type, param_len, *p = p_bytes; |
| |
| p_params->miu = LLCP_DEFAULT_MIU; |
| p_params->rw = LLCP_DEFAULT_RW; |
| p_params->sn[0] = 0; |
| |
| while (length) |
| { |
| BE_STREAM_TO_UINT8 (param_type, p); |
| length--; |
| |
| switch (param_type) |
| { |
| case LLCP_MIUX_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT16 (p_params->miu, p); |
| p_params->miu &= LLCP_MIUX_MASK; |
| p_params->miu += LLCP_DEFAULT_MIU; |
| |
| LLCP_TRACE_DEBUG1 ("llcp_util_parse_connect (): LLCP_MIUX_TYPE:%d", p_params->miu); |
| break; |
| |
| case LLCP_RW_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT8 (p_params->rw, p); |
| p_params->rw &= 0x0F; |
| |
| LLCP_TRACE_DEBUG1 ("llcp_util_parse_connect (): LLCP_RW_TYPE:%d", p_params->rw); |
| break; |
| |
| case LLCP_SN_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| |
| if (param_len <= LLCP_MAX_SN_LEN) |
| { |
| memcpy (p_params->sn, p, param_len); |
| p_params->sn[param_len] = 0; |
| } |
| else |
| { |
| memcpy (p_params->sn, p, LLCP_MAX_SN_LEN); |
| p_params->sn[LLCP_MAX_SN_LEN] = 0; |
| } |
| p += param_len; |
| |
| LLCP_TRACE_DEBUG1 ("llcp_util_parse_connect (): LLCP_SN_TYPE:<%s>", p_params->sn); |
| break; |
| |
| default: |
| LLCP_TRACE_ERROR1 ("llcp_util_parse_connect (): Unexpected type 0x%x", param_type); |
| BE_STREAM_TO_UINT8 (param_len, p); |
| p += param_len; |
| break; |
| } |
| |
| /* check remaining lengh */ |
| if (length >= param_len + 1) |
| { |
| length -= param_len + 1; |
| } |
| else |
| { |
| LLCP_TRACE_ERROR0 ("llcp_util_parse_connect (): Bad LTV's"); |
| return LLCP_STATUS_FAIL; |
| } |
| } |
| return LLCP_STATUS_SUCCESS; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_cc |
| ** |
| ** Description Send CC PDU |
| ** |
| ** Returns tLLCP_STATUS |
| ** |
| ******************************************************************************/ |
| tLLCP_STATUS llcp_util_send_cc (tLLCP_DLCB *p_dlcb, tLLCP_CONNECTION_PARAMS *p_params) |
| { |
| BT_HDR *p_msg; |
| UINT8 *p; |
| UINT16 miu_len = 0, rw_len = 0; |
| |
| if (p_params->miu != LLCP_DEFAULT_MIU) |
| { |
| miu_len = 4; |
| } |
| if (p_params->rw != LLCP_DEFAULT_RW) |
| { |
| rw_len = 3; |
| p_params->rw &= 0x0F; |
| } |
| |
| p_msg = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID); |
| |
| if (p_msg) |
| { |
| p_msg->len = LLCP_PDU_HEADER_SIZE + miu_len + rw_len; |
| p_msg->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (p_dlcb->remote_sap, LLCP_PDU_CC_TYPE, p_dlcb->local_sap)); |
| |
| if (miu_len) |
| { |
| UINT8_TO_BE_STREAM (p, LLCP_MIUX_TYPE); |
| UINT8_TO_BE_STREAM (p, LLCP_MIUX_LEN); |
| UINT16_TO_BE_STREAM (p, p_params->miu - LLCP_DEFAULT_MIU); |
| } |
| |
| if (rw_len) |
| { |
| UINT8_TO_BE_STREAM (p, LLCP_RW_TYPE); |
| UINT8_TO_BE_STREAM (p, LLCP_RW_LEN); |
| UINT8_TO_BE_STREAM (p, p_params->rw); |
| } |
| |
| GKI_enqueue (&llcp_cb.lcb.sig_xmit_q, p_msg); |
| llcp_link_check_send_data (); |
| |
| return LLCP_STATUS_SUCCESS; |
| } |
| |
| return LLCP_STATUS_FAIL; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_parse_cc |
| ** |
| ** Description Parse CC PDU |
| ** |
| ** Returns tLLCP_STATUS |
| ** |
| *******************************************************************************/ |
| tLLCP_STATUS llcp_util_parse_cc (UINT8 *p_bytes, UINT16 length, UINT16 *p_miu, UINT8 *p_rw) |
| { |
| UINT8 param_type, param_len, *p = p_bytes; |
| |
| *p_miu = LLCP_DEFAULT_MIU; |
| *p_rw = LLCP_DEFAULT_RW; |
| |
| while (length) |
| { |
| BE_STREAM_TO_UINT8 (param_type, p); |
| length--; |
| |
| switch (param_type) |
| { |
| case LLCP_MIUX_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT16 ((*p_miu), p); |
| (*p_miu) &= LLCP_MIUX_MASK; |
| (*p_miu) += LLCP_DEFAULT_MIU; |
| |
| LLCP_TRACE_DEBUG1 ("llcp_util_parse_cc (): LLCP_MIUX_TYPE:%d", *p_miu); |
| break; |
| |
| case LLCP_RW_TYPE: |
| BE_STREAM_TO_UINT8 (param_len, p); |
| BE_STREAM_TO_UINT8 ((*p_rw), p); |
| (*p_rw) &= 0x0F; |
| |
| LLCP_TRACE_DEBUG1 ("llcp_util_parse_cc (): LLCP_RW_TYPE:%d", *p_rw); |
| break; |
| |
| default: |
| LLCP_TRACE_ERROR1 ("llcp_util_parse_cc (): Unexpected type 0x%x", param_type); |
| BE_STREAM_TO_UINT8 (param_len, p); |
| p += param_len; |
| break; |
| } |
| |
| if (length >= param_len + 1) |
| length -= param_len + 1; |
| else |
| { |
| LLCP_TRACE_ERROR0 ("llcp_util_parse_cc (): Bad LTV's"); |
| return LLCP_STATUS_FAIL; |
| } |
| } |
| return LLCP_STATUS_SUCCESS; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_dm |
| ** |
| ** Description Send DM PDU |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_send_dm (UINT8 dsap, UINT8 ssap, UINT8 reason) |
| { |
| BT_HDR *p_msg; |
| UINT8 *p; |
| |
| p_msg = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID); |
| |
| if (p_msg) |
| { |
| p_msg->len = LLCP_PDU_DM_SIZE; |
| p_msg->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (dsap, LLCP_PDU_DM_TYPE, ssap)); |
| UINT8_TO_BE_STREAM (p, reason); |
| |
| GKI_enqueue (&llcp_cb.lcb.sig_xmit_q, p_msg); |
| llcp_link_check_send_data (); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_build_info_pdu |
| ** |
| ** Description Add DSAP, PTYPE, SSAP and sequence numbers and update local ack |
| ** sequence |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_build_info_pdu (tLLCP_DLCB *p_dlcb, BT_HDR *p_msg) |
| { |
| UINT8 *p; |
| UINT8 rcv_seq; |
| |
| p_msg->offset -= LLCP_PDU_HEADER_SIZE + LLCP_SEQUENCE_SIZE; |
| p_msg->len += LLCP_PDU_HEADER_SIZE + LLCP_SEQUENCE_SIZE; |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (p_dlcb->remote_sap, LLCP_PDU_I_TYPE, p_dlcb->local_sap)); |
| |
| /* if local_busy or rx congested then do not update receive sequence number to flow off */ |
| if ( (p_dlcb->local_busy) |
| ||(p_dlcb->is_rx_congested) |
| ||(llcp_cb.overall_rx_congested) ) |
| { |
| rcv_seq = p_dlcb->sent_ack_seq; |
| } |
| else |
| { |
| p_dlcb->sent_ack_seq = p_dlcb->next_rx_seq; |
| rcv_seq = p_dlcb->sent_ack_seq; |
| } |
| UINT8_TO_BE_STREAM (p, LLCP_GET_SEQUENCE (p_dlcb->next_tx_seq, rcv_seq)); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_frmr |
| ** |
| ** Description Send FRMR PDU |
| ** |
| ** Returns tLLCP_STATUS |
| ** |
| *******************************************************************************/ |
| tLLCP_STATUS llcp_util_send_frmr (tLLCP_DLCB *p_dlcb, UINT8 flags, UINT8 ptype, UINT8 sequence) |
| { |
| BT_HDR *p_msg; |
| UINT8 *p; |
| |
| p_msg = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID); |
| |
| if (p_msg) |
| { |
| p_msg->len = LLCP_PDU_FRMR_SIZE; |
| p_msg->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (p_dlcb->remote_sap, LLCP_PDU_FRMR_TYPE, p_dlcb->local_sap)); |
| UINT8_TO_BE_STREAM (p, (flags << 4) | ptype); |
| UINT8_TO_BE_STREAM (p, sequence); |
| UINT8_TO_BE_STREAM (p, (p_dlcb->next_tx_seq << 4) | p_dlcb->next_rx_seq); |
| UINT8_TO_BE_STREAM (p, (p_dlcb->rcvd_ack_seq << 4) | p_dlcb->sent_ack_seq); |
| |
| GKI_enqueue (&llcp_cb.lcb.sig_xmit_q, p_msg); |
| llcp_link_check_send_data (); |
| |
| return LLCP_STATUS_SUCCESS; |
| } |
| else |
| { |
| LLCP_TRACE_ERROR0 ("llcp_util_send_frmr (): Out of resource"); |
| return LLCP_STATUS_FAIL; |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_send_rr_rnr |
| ** |
| ** Description Send RR or RNR PDU |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void llcp_util_send_rr_rnr (tLLCP_DLCB *p_dlcb) |
| { |
| BT_HDR *p_msg; |
| UINT8 *p; |
| UINT8 pdu_type; |
| UINT8 pdu_size; |
| UINT8 rcv_seq; |
| |
| /* if no indication of change in local busy or rx congestion */ |
| if ((p_dlcb->flags & LLCP_DATA_LINK_FLAG_PENDING_RR_RNR) == 0) |
| { |
| /* if all ack is sent */ |
| if (p_dlcb->sent_ack_seq == p_dlcb->next_rx_seq) |
| { |
| /* we don't need to send RR/RNR */ |
| return; |
| } |
| else |
| { |
| /* if rx flow off because of local busy or congestion */ |
| if ( (p_dlcb->local_busy) |
| ||(p_dlcb->is_rx_congested) |
| ||(llcp_cb.overall_rx_congested) ) |
| { |
| /* don't send RR/RNR */ |
| return; |
| } |
| } |
| } |
| |
| if ( (p_dlcb->local_busy) |
| ||(p_dlcb->is_rx_congested) |
| ||(llcp_cb.overall_rx_congested) ) |
| { |
| LLCP_TRACE_DEBUG3 ("llcp_util_send_rr_rnr (): local_busy=%d,is_rx_congested=%d,overall_rx_congested=%d", |
| p_dlcb->local_busy, p_dlcb->is_rx_congested, llcp_cb.overall_rx_congested); |
| |
| /* if local_busy or rx congested then do not update receive sequence number to flow off */ |
| pdu_type = LLCP_PDU_RNR_TYPE; |
| pdu_size = LLCP_PDU_RNR_SIZE; |
| rcv_seq = p_dlcb->sent_ack_seq; |
| } |
| else |
| { |
| pdu_type = LLCP_PDU_RR_TYPE; |
| pdu_size = LLCP_PDU_RR_SIZE; |
| |
| p_dlcb->sent_ack_seq = p_dlcb->next_rx_seq; |
| rcv_seq = p_dlcb->sent_ack_seq; |
| } |
| |
| p_msg = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID); |
| |
| if (p_msg) |
| { |
| p_dlcb->flags &= ~LLCP_DATA_LINK_FLAG_PENDING_RR_RNR; |
| |
| p_msg->len = pdu_size; |
| p_msg->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE; |
| |
| p = (UINT8 *) (p_msg + 1) + p_msg->offset; |
| |
| UINT16_TO_BE_STREAM (p, LLCP_GET_PDU_HEADER (p_dlcb->remote_sap, pdu_type, p_dlcb->local_sap)); |
| |
| UINT8_TO_BE_STREAM (p, rcv_seq); |
| |
| #if (BT_TRACE_VERBOSE == TRUE) |
| LLCP_TRACE_DEBUG5 ("LLCP TX - N(S,R):(NA,%d) V(S,SA,R,RA):(%d,%d,%d,%d)", |
| p_dlcb->next_rx_seq, |
| p_dlcb->next_tx_seq, p_dlcb->rcvd_ack_seq, |
| p_dlcb->next_rx_seq, p_dlcb->sent_ack_seq); |
| #endif |
| GKI_enqueue (&llcp_cb.lcb.sig_xmit_q, p_msg); |
| llcp_link_check_send_data (); |
| } |
| else |
| { |
| LLCP_TRACE_ERROR0 ("llcp_util_send_rr_rnr (): Out of resource"); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function llcp_util_get_app_cb |
| ** |
| ** Description get pointer of application registered control block by SAP |
| ** |
| ** Returns tLLCP_APP_CB * |
| ** |
| *******************************************************************************/ |
| tLLCP_APP_CB *llcp_util_get_app_cb (UINT8 local_sap) |
| { |
| tLLCP_APP_CB *p_app_cb = NULL; |
| |
| if (local_sap <= LLCP_UPPER_BOUND_WK_SAP) |
| { |
| if ((local_sap != LLCP_SAP_LM) && (local_sap < LLCP_MAX_WKS)) |
| { |
| p_app_cb = &llcp_cb.wks_cb[local_sap]; |
| } |
| } |
| else if (local_sap <= LLCP_UPPER_BOUND_SDP_SAP) |
| { |
| if (local_sap - LLCP_LOWER_BOUND_SDP_SAP < LLCP_MAX_SERVER) |
| { |
| p_app_cb = &llcp_cb.server_cb[local_sap - LLCP_LOWER_BOUND_SDP_SAP]; |
| } |
| } |
| else if (local_sap <= LLCP_UPPER_BOUND_LOCAL_SAP) |
| { |
| if (local_sap - LLCP_LOWER_BOUND_LOCAL_SAP < LLCP_MAX_CLIENT) |
| { |
| p_app_cb = &llcp_cb.client_cb[local_sap - LLCP_LOWER_BOUND_LOCAL_SAP]; |
| } |
| } |
| |
| return (p_app_cb); |
| } |
