| /****************************************************************************** |
| * |
| * 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 L2CAP UCD code |
| * |
| ******************************************************************************/ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "bt_common.h" |
| #include "bt_types.h" |
| #include "btm_api.h" |
| #include "btm_int.h" |
| #include "btu.h" |
| #include "hcidefs.h" |
| #include "hcimsgs.h" |
| #include "l2c_int.h" |
| #include "l2cdefs.h" |
| |
| #if (L2CAP_UCD_INCLUDED == TRUE) |
| |
| static bool l2c_ucd_connect(const RawAddress& rem_bda); |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_discover_cback |
| * |
| * Description UCD Discover callback |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void l2c_ucd_discover_cback(const RawAddress& rem_bda, uint8_t info_type, |
| uint32_t data) { |
| tL2C_RCB* p_rcb = &l2cb.rcb_pool[0]; |
| uint16_t xx; |
| |
| L2CAP_TRACE_DEBUG("L2CAP - l2c_ucd_discover_cback"); |
| |
| for (xx = 0; xx < MAX_L2CAP_CLIENTS; xx++, p_rcb++) { |
| if (p_rcb->in_use) { |
| /* if this application is waiting UCD reception info */ |
| if ((info_type == L2CAP_UCD_INFO_TYPE_RECEPTION) && |
| (p_rcb->ucd.state & L2C_UCD_STATE_W4_RECEPTION)) { |
| p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb(rem_bda, info_type, data); |
| p_rcb->ucd.state &= ~(L2C_UCD_STATE_W4_RECEPTION); |
| } |
| |
| /* if this application is waiting UCD MTU info */ |
| if ((info_type == L2CAP_UCD_INFO_TYPE_MTU) && |
| (p_rcb->ucd.state & L2C_UCD_STATE_W4_MTU)) { |
| p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb(rem_bda, info_type, data); |
| p_rcb->ucd.state &= ~(L2C_UCD_STATE_W4_MTU); |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_data_ind_cback |
| * |
| * Description UCD Data callback |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void l2c_ucd_data_ind_cback(const RawAddress& rem_bda, BT_HDR* p_buf) { |
| uint8_t* p; |
| uint16_t psm; |
| tL2C_RCB* p_rcb; |
| |
| L2CAP_TRACE_DEBUG("L2CAP - l2c_ucd_data_ind_cback"); |
| |
| p = (uint8_t*)(p_buf + 1) + p_buf->offset; |
| STREAM_TO_UINT16(psm, p) |
| |
| p_buf->offset += L2CAP_UCD_OVERHEAD; |
| p_buf->len -= L2CAP_UCD_OVERHEAD; |
| |
| p_rcb = l2cu_find_rcb_by_psm(psm); |
| if (p_rcb == NULL) { |
| L2CAP_TRACE_ERROR("L2CAP - no RCB for l2c_ucd_data_ind_cback, PSM: 0x%04x", |
| psm); |
| osi_free(p_buf); |
| } else { |
| p_rcb->ucd.cb_info.pL2CA_UCD_Data_Cb(rem_bda, p_buf); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_congestion_status_cback |
| * |
| * Description UCD Congestion Status callback |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void l2c_ucd_congestion_status_cback(const RawAddress& rem_bda, |
| bool is_congested) { |
| tL2C_RCB* p_rcb = &l2cb.rcb_pool[0]; |
| uint16_t xx; |
| |
| L2CAP_TRACE_DEBUG("L2CAP - l2c_ucd_congestion_status_cback"); |
| |
| for (xx = 0; xx < MAX_L2CAP_CLIENTS; xx++, p_rcb++) { |
| if ((p_rcb->in_use) && (p_rcb->ucd.state != L2C_UCD_STATE_UNUSED)) { |
| if (p_rcb->ucd.cb_info.pL2CA_UCD_Congestion_Status_Cb) { |
| L2CAP_TRACE_DEBUG( |
| "L2CAP - Calling UCDCongestionStatus_Cb (%d), PSM=0x%04x, BDA: " |
| "%08x%04x,", |
| is_congested, p_rcb->psm, (rem_bda[0] << 24) + (rem_bda[1] << 16) + |
| (rem_bda[2] << 8) + rem_bda[3], |
| (rem_bda[4] << 8) + rem_bda[5]); |
| |
| p_rcb->ucd.cb_info.pL2CA_UCD_Congestion_Status_Cb(rem_bda, |
| is_congested); |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_disconnect_ind_cback |
| * |
| * Description UCD disconnect callback (Prevent to access null pointer) |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void l2c_ucd_disconnect_ind_cback(uint16_t cid, bool result) { |
| /* do nothing */ |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_config_ind_cback |
| * |
| * Description UCD config callback (This prevent to access null pointer) |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void l2c_ucd_config_ind_cback(uint16_t cid, tL2CAP_CFG_INFO* p_cfg) { |
| /* do nothing */ |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_config_cfm_cback |
| * |
| * Description UCD config callback (This prevent to access null pointer) |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void l2c_ucd_config_cfm_cback(uint16_t cid, tL2CAP_CFG_INFO* p_cfg) { |
| /* do nothing */ |
| } |
| |
| /******************************************************************************* |
| * |
| * Function L2CA_UcdRegister |
| * |
| * Description Register PSM on UCD. |
| * |
| * Parameters: tL2CAP_UCD_CB_INFO |
| * |
| * Return value: true if successs |
| * |
| ******************************************************************************/ |
| bool L2CA_UcdRegister(uint16_t psm, tL2CAP_UCD_CB_INFO* p_cb_info) { |
| tL2C_RCB* p_rcb; |
| |
| L2CAP_TRACE_API("L2CA_UcdRegister() PSM: 0x%04x", psm); |
| |
| if ((!p_cb_info->pL2CA_UCD_Discover_Cb) || (!p_cb_info->pL2CA_UCD_Data_Cb)) { |
| L2CAP_TRACE_ERROR("L2CAP - no callback registering PSM(0x%04x) on UCD", |
| psm); |
| return (false); |
| } |
| |
| p_rcb = l2cu_find_rcb_by_psm(psm); |
| if (p_rcb == NULL) { |
| L2CAP_TRACE_ERROR("L2CAP - no RCB for L2CA_UcdRegister, PSM: 0x%04x", psm); |
| return (false); |
| } |
| |
| p_rcb->ucd.state = L2C_UCD_STATE_W4_DATA; |
| p_rcb->ucd.cb_info = *p_cb_info; |
| |
| /* check if master rcb is created for UCD */ |
| p_rcb = l2cu_find_rcb_by_psm(L2C_UCD_RCB_ID); |
| if (p_rcb == NULL) { |
| p_rcb = l2cu_allocate_rcb(L2C_UCD_RCB_ID); |
| if (p_rcb == NULL) { |
| L2CAP_TRACE_ERROR("L2CAP - no RCB available for L2CA_UcdRegister"); |
| return (false); |
| } else { |
| /* these callback functions will forward data to each UCD application */ |
| p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb = l2c_ucd_discover_cback; |
| p_rcb->ucd.cb_info.pL2CA_UCD_Data_Cb = l2c_ucd_data_ind_cback; |
| p_rcb->ucd.cb_info.pL2CA_UCD_Congestion_Status_Cb = |
| l2c_ucd_congestion_status_cback; |
| |
| memset(&p_rcb->api, 0, sizeof(tL2CAP_APPL_INFO)); |
| p_rcb->api.pL2CA_DisconnectInd_Cb = l2c_ucd_disconnect_ind_cback; |
| |
| /* This will make L2CAP check UCD congestion callback */ |
| p_rcb->api.pL2CA_CongestionStatus_Cb = NULL; |
| |
| /* do nothing but prevent crash */ |
| p_rcb->api.pL2CA_ConfigInd_Cb = l2c_ucd_config_ind_cback; |
| p_rcb->api.pL2CA_ConfigCfm_Cb = l2c_ucd_config_cfm_cback; |
| } |
| } |
| |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function L2CA_UcdDeregister |
| * |
| * Description Deregister PSM on UCD. |
| * |
| * Parameters: PSM |
| * |
| * Return value: true if successs |
| * |
| ******************************************************************************/ |
| bool L2CA_UcdDeregister(uint16_t psm) { |
| tL2C_CCB* p_ccb; |
| tL2C_RCB* p_rcb; |
| uint16_t xx; |
| |
| L2CAP_TRACE_API("L2CA_UcdDeregister() PSM: 0x%04x", psm); |
| |
| p_rcb = l2cu_find_rcb_by_psm(psm); |
| if (p_rcb == NULL) { |
| L2CAP_TRACE_ERROR("L2CAP - no RCB for L2CA_UcdDeregister, PSM: 0x%04x", |
| psm); |
| return (false); |
| } |
| |
| p_rcb->ucd.state = L2C_UCD_STATE_UNUSED; |
| |
| /* check this was the last UCD registration */ |
| p_rcb = &l2cb.rcb_pool[0]; |
| |
| for (xx = 0; xx < MAX_L2CAP_CLIENTS; xx++, p_rcb++) { |
| if ((p_rcb->in_use) && (p_rcb->ucd.state != L2C_UCD_STATE_UNUSED)) |
| return (true); |
| } |
| |
| /* delete master rcb for UCD */ |
| p_rcb = l2cu_find_rcb_by_psm(L2C_UCD_RCB_ID); |
| if (p_rcb != NULL) { |
| l2cu_release_rcb(p_rcb); |
| } |
| |
| /* delete CCB for UCD */ |
| p_ccb = l2cb.ccb_pool; |
| for (xx = 0; xx < MAX_L2CAP_CHANNELS; xx++) { |
| if ((p_ccb->in_use) && (p_ccb->local_cid == L2CAP_CONNECTIONLESS_CID)) { |
| l2cu_release_ccb(p_ccb); |
| } |
| p_ccb++; |
| } |
| |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function L2CA_UcdDiscover |
| * |
| * Description Discover UCD of remote device. |
| * |
| * Parameters: PSM |
| * BD_ADDR of remote device |
| * info_type : L2CAP_UCD_INFO_TYPE_RECEPTION |
| * L2CAP_UCD_INFO_TYPE_MTU |
| * |
| * |
| * Return value: true if successs |
| * |
| ******************************************************************************/ |
| bool L2CA_UcdDiscover(uint16_t psm, const RawAddress& rem_bda, |
| uint8_t info_type) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| tL2C_RCB* p_rcb; |
| |
| L2CAP_TRACE_API( |
| "L2CA_UcdDiscover() PSM: 0x%04x BDA: %08x%04x, InfoType=0x%02x", psm, |
| (rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], |
| (rem_bda[4] << 8) + rem_bda[5], info_type); |
| |
| /* Fail if the PSM is not registered */ |
| if (((p_rcb = l2cu_find_rcb_by_psm(psm)) == NULL) || |
| (p_rcb->ucd.state == L2C_UCD_STATE_UNUSED)) { |
| L2CAP_TRACE_WARNING("L2CAP - no RCB for L2CA_UcdDiscover, PSM: 0x%04x", |
| psm); |
| return (false); |
| } |
| |
| /* First, see if we already have a link to the remote */ |
| /* then find the channel control block for UCD. */ |
| if (((p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_BR_EDR)) == |
| NULL) || |
| ((p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID)) == |
| NULL)) { |
| if (l2c_ucd_connect(rem_bda) == false) { |
| return (false); |
| } |
| } |
| |
| /* set waiting flags in rcb */ |
| |
| if (info_type & L2CAP_UCD_INFO_TYPE_RECEPTION) |
| p_rcb->ucd.state |= L2C_UCD_STATE_W4_RECEPTION; |
| |
| if (info_type & L2CAP_UCD_INFO_TYPE_MTU) |
| p_rcb->ucd.state |= L2C_UCD_STATE_W4_MTU; |
| |
| /* if link is already established */ |
| if ((p_lcb) && (p_lcb->link_state == LST_CONNECTED)) { |
| if (!p_ccb) { |
| p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID); |
| } |
| l2c_ucd_check_pending_info_req(p_ccb); |
| } |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function L2CA_UcdDataWrite |
| * |
| * Description Send UCD to remote device |
| * |
| * Parameters: PSM |
| * BD Address of remote |
| * Pointer to buffer of type BT_HDR |
| * flags : L2CAP_FLUSHABLE_CH_BASED |
| * L2CAP_FLUSHABLE_PKT |
| * L2CAP_NON_FLUSHABLE_PKT |
| * |
| * Return value L2CAP_DW_SUCCESS, if data accepted |
| * L2CAP_DW_FAILED, if error |
| * |
| ******************************************************************************/ |
| uint16_t L2CA_UcdDataWrite(uint16_t psm, const RawAddress& rem_bda, |
| BT_HDR* p_buf, uint16_t flags) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| tL2C_RCB* p_rcb; |
| uint8_t* p; |
| |
| L2CAP_TRACE_API( |
| "L2CA_UcdDataWrite() PSM: 0x%04x BDA: %08x%04x", psm, |
| (rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], |
| (rem_bda[4] << 8) + rem_bda[5]); |
| |
| /* Fail if the PSM is not registered */ |
| if (((p_rcb = l2cu_find_rcb_by_psm(psm)) == NULL) || |
| (p_rcb->ucd.state == L2C_UCD_STATE_UNUSED)) { |
| L2CAP_TRACE_WARNING("L2CAP - no RCB for L2CA_UcdDataWrite, PSM: 0x%04x", |
| psm); |
| osi_free(p_buf); |
| return (L2CAP_DW_FAILED); |
| } |
| |
| /* First, see if we already have a link to the remote */ |
| /* then find the channel control block for UCD */ |
| if (((p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_BR_EDR)) == |
| NULL) || |
| ((p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID)) == |
| NULL)) { |
| if (l2c_ucd_connect(rem_bda) == false) { |
| osi_free(p_buf); |
| return (L2CAP_DW_FAILED); |
| } |
| |
| /* If we still don't have lcb and ccb after connect attempt, then can't |
| * proceed */ |
| if (((p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_BR_EDR)) == |
| NULL) || |
| ((p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID)) == |
| NULL)) { |
| osi_free(p_buf); |
| return (L2CAP_DW_FAILED); |
| } |
| } |
| |
| /* write PSM */ |
| p_buf->offset -= L2CAP_UCD_OVERHEAD; |
| p_buf->len += L2CAP_UCD_OVERHEAD; |
| p = (uint8_t*)(p_buf + 1) + p_buf->offset; |
| |
| UINT16_TO_STREAM(p, psm); |
| |
| /* UCD MTU check */ |
| if ((p_lcb->ucd_mtu) && (p_buf->len > p_lcb->ucd_mtu)) { |
| L2CAP_TRACE_WARNING( |
| "L2CAP - Handle: 0x%04x UCD bigger than peer's UCD mtu size cannot be " |
| "sent", |
| p_lcb->handle); |
| osi_free(p_buf); |
| return (L2CAP_DW_FAILED); |
| } |
| |
| /* If already congested, do not accept any more packets */ |
| if (p_ccb->cong_sent) { |
| L2CAP_TRACE_ERROR( |
| "L2CAP - Handle: 0x%04x UCD cannot be sent, already congested count: " |
| "%u buff_quota: %u", |
| p_lcb->handle, (fixed_queue_length(p_ccb->xmit_hold_q) + |
| fixed_queue_length(p_lcb->ucd_out_sec_pending_q)), |
| p_ccb->buff_quota); |
| |
| osi_free(p_buf); |
| return (L2CAP_DW_FAILED); |
| } |
| |
| /* channel based, packet based flushable or non-flushable */ |
| p_buf->layer_specific = flags; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_L2CA_DATA_WRITE, p_buf); |
| |
| if (p_ccb->cong_sent) |
| return (L2CAP_DW_CONGESTED); |
| else |
| return (L2CAP_DW_SUCCESS); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function L2CA_UcdSetIdleTimeout |
| * |
| * Description Set UCD Idle timeout. |
| * |
| * Parameters: BD Addr |
| * Timeout in second |
| * |
| * Return value: true if successs |
| * |
| ******************************************************************************/ |
| bool L2CA_UcdSetIdleTimeout(const RawAddress& rem_bda, uint16_t timeout) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| |
| L2CAP_TRACE_API( |
| "L2CA_UcdSetIdleTimeout() Timeout: 0x%04x BDA: %08x%04x", timeout, |
| (rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], |
| (rem_bda[4] << 8) + rem_bda[5]); |
| |
| /* First, see if we already have a link to the remote */ |
| /* then find the channel control block. */ |
| if (((p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_BR_EDR)) == |
| NULL) || |
| ((p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID)) == |
| NULL)) { |
| L2CAP_TRACE_WARNING("L2CAP - no UCD channel"); |
| return (false); |
| } else { |
| p_ccb->fixed_chnl_idle_tout = timeout; |
| return (true); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function L2CA_UCDSetTxPriority |
| * |
| * Description Sets the transmission priority for a connectionless channel. |
| * |
| * Returns true if a valid channel, else false |
| * |
| ******************************************************************************/ |
| bool L2CA_UCDSetTxPriority(const RawAddress& rem_bda, |
| tL2CAP_CHNL_PRIORITY priority) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| |
| L2CAP_TRACE_API( |
| "L2CA_UCDSetTxPriority() priority: 0x%02x BDA: %08x%04x", priority, |
| (rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], |
| (rem_bda[4] << 8) + rem_bda[5]); |
| |
| p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_BR_EDR); |
| if (p_lcb == NULL) { |
| L2CAP_TRACE_WARNING("L2CAP - no LCB for L2CA_UCDSetTxPriority"); |
| return (false); |
| } |
| |
| /* Find the channel control block */ |
| p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID); |
| if (p_ccb == NULL) { |
| L2CAP_TRACE_WARNING("L2CAP - no CCB for L2CA_UCDSetTxPriority"); |
| return (false); |
| } |
| |
| /* it will update the order of CCB in LCB by priority and update round robin |
| * service variables */ |
| l2cu_change_pri_ccb(p_ccb, priority); |
| |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_connect |
| * |
| * Description Connect UCD to remote device. |
| * |
| * Parameters: BD_ADDR of remote device |
| * |
| * Return value: true if successs |
| * |
| ******************************************************************************/ |
| static bool l2c_ucd_connect(const RawAddress& rem_bda) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| tL2C_RCB* p_rcb; |
| |
| L2CAP_TRACE_DEBUG( |
| "l2c_ucd_connect() BDA: %08x%04x", |
| (rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], |
| (rem_bda[4] << 8) + rem_bda[5]); |
| |
| /* Fail if we have not established communications with the controller */ |
| if (!BTM_IsDeviceUp()) { |
| L2CAP_TRACE_WARNING("l2c_ucd_connect - BTU not ready"); |
| return (false); |
| } |
| |
| /* First, see if we already have a link to the remote */ |
| p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_BR_EDR); |
| if (p_lcb == NULL) { |
| /* No link. Get an LCB and start link establishment */ |
| if (((p_lcb = l2cu_allocate_lcb(rem_bda, false, BT_TRANSPORT_BR_EDR)) == |
| NULL) || |
| (l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR) == false)) { |
| L2CAP_TRACE_WARNING("L2CAP - conn not started l2c_ucd_connect"); |
| return (false); |
| } |
| } else if (p_lcb->info_rx_bits & (1 << L2CAP_EXTENDED_FEATURES_INFO_TYPE)) { |
| if (!(p_lcb->peer_ext_fea & L2CAP_EXTFEA_UCD_RECEPTION)) { |
| L2CAP_TRACE_WARNING( |
| "L2CAP - UCD is not supported by peer, l2c_ucd_connect"); |
| return (false); |
| } |
| } |
| |
| /* Find the channel control block. */ |
| p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID); |
| if (p_ccb == NULL) { |
| /* Allocate a channel control block */ |
| p_ccb = l2cu_allocate_ccb(p_lcb, 0); |
| if (p_ccb == NULL) { |
| L2CAP_TRACE_WARNING("L2CAP - no CCB for l2c_ucd_connect"); |
| return (false); |
| } else { |
| /* Set CID for the connection */ |
| p_ccb->local_cid = L2CAP_CONNECTIONLESS_CID; |
| p_ccb->remote_cid = L2CAP_CONNECTIONLESS_CID; |
| |
| /* Set the default idle timeout value to use */ |
| p_ccb->fixed_chnl_idle_tout = L2CAP_UCD_IDLE_TIMEOUT; |
| |
| /* Set the default channel priority value to use */ |
| l2cu_change_pri_ccb(p_ccb, L2CAP_UCD_CH_PRIORITY); |
| |
| p_rcb = l2cu_find_rcb_by_psm(L2C_UCD_RCB_ID); |
| if (p_rcb == NULL) { |
| L2CAP_TRACE_WARNING("L2CAP - no UCD registered, l2c_ucd_connect"); |
| return (false); |
| } |
| /* Save UCD registration info */ |
| p_ccb->p_rcb = p_rcb; |
| |
| /* There is no configuration, so if the link is up, the channel is up */ |
| if (p_lcb->link_state == LST_CONNECTED) { |
| p_ccb->chnl_state = CST_OPEN; |
| } |
| } |
| } |
| |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_delete_sec_pending_q |
| * |
| * Description discard all of UCD packets in security pending queue |
| * |
| * Returns None |
| * |
| ******************************************************************************/ |
| void l2c_ucd_delete_sec_pending_q(tL2C_LCB* p_lcb) { |
| /* clean up any security pending UCD */ |
| while (!fixed_queue_is_empty(p_lcb->ucd_out_sec_pending_q)) |
| osi_free(fixed_queue_try_dequeue(p_lcb->ucd_out_sec_pending_q)); |
| fixed_queue_free(p_lcb->ucd_out_sec_pending_q, NULL); |
| p_lcb->ucd_out_sec_pending_q = NULL; |
| |
| while (!fixed_queue_is_empty(p_lcb->ucd_in_sec_pending_q)) |
| osi_free(fixed_queue_try_dequeue(p_lcb->ucd_in_sec_pending_q)); |
| fixed_queue_free(p_lcb->ucd_in_sec_pending_q); |
| p_lcb->ucd_in_sec_pending_q = NULL; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_check_pending_info_req |
| * |
| * Description check if any application is waiting for UCD information |
| * |
| * Return true if any pending UCD info request |
| * |
| ******************************************************************************/ |
| bool l2c_ucd_check_pending_info_req(tL2C_CCB* p_ccb) { |
| tL2C_RCB* p_rcb = &l2cb.rcb_pool[0]; |
| uint16_t xx; |
| bool pending = false; |
| |
| if (p_ccb == NULL) { |
| L2CAP_TRACE_ERROR("L2CAP - NULL p_ccb in l2c_ucd_check_pending_info_req"); |
| return (false); |
| } |
| |
| for (xx = 0; xx < MAX_L2CAP_CLIENTS; xx++, p_rcb++) { |
| if (p_rcb->in_use) { |
| /* if application is waiting UCD reception info */ |
| if (p_rcb->ucd.state & L2C_UCD_STATE_W4_RECEPTION) { |
| /* if this information is available */ |
| if (p_ccb->p_lcb->info_rx_bits & |
| (1 << L2CAP_EXTENDED_FEATURES_INFO_TYPE)) { |
| if (!(p_ccb->p_lcb->peer_ext_fea & L2CAP_EXTFEA_UCD_RECEPTION)) { |
| L2CAP_TRACE_WARNING( |
| "L2CAP - UCD is not supported by peer, " |
| "l2c_ucd_check_pending_info_req"); |
| |
| l2c_ucd_delete_sec_pending_q(p_ccb->p_lcb); |
| l2cu_release_ccb(p_ccb); |
| } |
| |
| p_ccb->p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb( |
| p_ccb->p_lcb->remote_bd_addr, L2CAP_UCD_INFO_TYPE_RECEPTION, |
| p_ccb->p_lcb->peer_ext_fea & L2CAP_EXTFEA_UCD_RECEPTION); |
| } else { |
| pending = true; |
| if (p_ccb->p_lcb->w4_info_rsp == false) { |
| l2cu_send_peer_info_req(p_ccb->p_lcb, |
| L2CAP_EXTENDED_FEATURES_INFO_TYPE); |
| } |
| } |
| } |
| |
| /* if application is waiting for UCD MTU */ |
| if (p_rcb->ucd.state & L2C_UCD_STATE_W4_MTU) { |
| /* if this information is available */ |
| if (p_ccb->p_lcb->info_rx_bits & (1 << L2CAP_CONNLESS_MTU_INFO_TYPE)) { |
| p_ccb->p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb( |
| p_ccb->p_lcb->remote_bd_addr, L2CAP_UCD_INFO_TYPE_MTU, |
| p_ccb->p_lcb->ucd_mtu); |
| } else { |
| pending = true; |
| if (p_ccb->p_lcb->w4_info_rsp == false) { |
| l2cu_send_peer_info_req(p_ccb->p_lcb, L2CAP_CONNLESS_MTU_INFO_TYPE); |
| } |
| } |
| } |
| } |
| } |
| return (pending); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_enqueue_pending_out_sec_q |
| * |
| * Description enqueue outgoing UCD packet into security pending queue |
| * and check congestion |
| * |
| * Return None |
| * |
| ******************************************************************************/ |
| void l2c_ucd_enqueue_pending_out_sec_q(tL2C_CCB* p_ccb, void* p_data) { |
| fixed_queue_enqueue(p_ccb->p_lcb->ucd_out_sec_pending_q, p_data); |
| l2cu_check_channel_congestion(p_ccb); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_check_pending_out_sec_q |
| * |
| * Description check outgoing security |
| * |
| * Return true if any UCD packet for security |
| * |
| ******************************************************************************/ |
| bool l2c_ucd_check_pending_out_sec_q(tL2C_CCB* p_ccb) { |
| BT_HDR* p_buf = |
| (BT_HDR*)fixed_queue_try_peek_first(p_ccb->p_lcb->ucd_out_sec_pending_q); |
| |
| if (p_buf != NULL) { |
| uint16_t psm; |
| uint8_t* p = (uint8_t*)(p_buf + 1) + p_buf->offset; |
| |
| STREAM_TO_UINT16(psm, p) |
| |
| p_ccb->chnl_state = CST_ORIG_W4_SEC_COMP; |
| btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr, psm, |
| p_ccb->p_lcb->handle, CONNLESS_ORIG, |
| &l2c_link_sec_comp, p_ccb); |
| |
| return (true); |
| } |
| return (false); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_send_pending_out_sec_q |
| * |
| * Description dequeue UCD packet from security pending queue and |
| * enqueue it into CCB |
| * |
| * Return None |
| * |
| ******************************************************************************/ |
| void l2c_ucd_send_pending_out_sec_q(tL2C_CCB* p_ccb) { |
| BT_HDR* p_buf = |
| (BT_HDR*)fixed_queue_try_dequeue(p_ccb->p_lcb->ucd_out_sec_pending_q); |
| |
| if (p_buf != NULL) { |
| l2c_enqueue_peer_data(p_ccb, (BT_HDR*)p_buf); |
| l2c_link_check_send_pkts(p_ccb->p_lcb, NULL, NULL); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_discard_pending_out_sec_q |
| * |
| * Description dequeue UCD packet from security pending queue and |
| * discard it. |
| * |
| * Return None |
| * |
| ******************************************************************************/ |
| void l2c_ucd_discard_pending_out_sec_q(tL2C_CCB* p_ccb) { |
| BT_HDR* p_buf = |
| (BT_HDR*)fixed_queue_try_dequeue(p_ccb->p_lcb->ucd_out_sec_pending_q); |
| |
| /* we may need to report to application */ |
| osi_free(p_buf); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_check_pending_in_sec_q |
| * |
| * Description check incoming security |
| * |
| * Return true if any UCD packet for security |
| * |
| ******************************************************************************/ |
| bool l2c_ucd_check_pending_in_sec_q(tL2C_CCB* p_ccb) { |
| BT_HDR* p_buf = |
| (BT_HDR*)fixed_queue_try_dequeue(p_ccb->p_lcb->ucd_in_sec_pending_q); |
| |
| if (p_buf != NULL) { |
| uint16_t psm; |
| uint8_t* p = (uint8_t*)(p_buf + 1) + p_buf->offset; |
| STREAM_TO_UINT16(psm, p) |
| |
| p_ccb->chnl_state = CST_TERM_W4_SEC_COMP; |
| btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr, psm, |
| p_ccb->p_lcb->handle, CONNLESS_TERM, |
| &l2c_link_sec_comp, p_ccb); |
| |
| return (true); |
| } |
| return (false); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_send_pending_in_sec_q |
| * |
| * Description dequeue UCD packet from security pending queue and |
| * send it to application |
| * |
| * Return None |
| * |
| ******************************************************************************/ |
| void l2c_ucd_send_pending_in_sec_q(tL2C_CCB* p_ccb) { |
| BT_HDR* p_buf = |
| (BT_HDR*)fixed_queue_try_dequeue(p_ccb->p_lcb->ucd_in_sec_pending_q) |
| |
| if (p_buf != NULL) { |
| p_ccb->p_rcb->ucd.cb_info.pL2CA_UCD_Data_Cb(p_ccb->p_lcb->remote_bd_addr, |
| (BT_HDR*)p_buf); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_discard_pending_in_sec_q |
| * |
| * Description dequeue UCD packet from security pending queue and |
| * discard it. |
| * |
| * Return None |
| * |
| ******************************************************************************/ |
| void l2c_ucd_discard_pending_in_sec_q(tL2C_CCB* p_ccb) { |
| BT_HDR* p_buf = |
| (BT_HDR*)fixed_queue_try_dequeue(p_ccb->p_lcb->ucd_in_sec_pending_q); |
| osi_free(p_buf); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_check_rx_pkts |
| * |
| * Description Check if UCD reception is registered. |
| * Process received UCD packet if application is expecting. |
| * |
| * Return true if UCD reception is registered |
| * |
| ******************************************************************************/ |
| bool l2c_ucd_check_rx_pkts(tL2C_LCB* p_lcb, BT_HDR* p_msg) { |
| tL2C_CCB* p_ccb; |
| tL2C_RCB* p_rcb; |
| |
| if (((p_ccb = l2cu_find_ccb_by_cid(p_lcb, L2CAP_CONNECTIONLESS_CID)) != |
| NULL) || |
| ((p_rcb = l2cu_find_rcb_by_psm(L2C_UCD_RCB_ID)) != NULL)) { |
| if (p_ccb == NULL) { |
| /* Allocate a channel control block */ |
| p_ccb = l2cu_allocate_ccb(p_lcb, 0); |
| if (p_ccb == NULL) { |
| L2CAP_TRACE_WARNING("L2CAP - no CCB for UCD reception"); |
| osi_free(p_msg); |
| return true; |
| } else { |
| /* Set CID for the connection */ |
| p_ccb->local_cid = L2CAP_CONNECTIONLESS_CID; |
| p_ccb->remote_cid = L2CAP_CONNECTIONLESS_CID; |
| |
| /* Set the default idle timeout value to use */ |
| p_ccb->fixed_chnl_idle_tout = L2CAP_UCD_IDLE_TIMEOUT; |
| |
| /* Set the default channel priority value to use */ |
| l2cu_change_pri_ccb(p_ccb, L2CAP_UCD_CH_PRIORITY); |
| |
| /* Save registration info */ |
| p_ccb->p_rcb = p_rcb; |
| |
| p_ccb->chnl_state = CST_OPEN; |
| } |
| } |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_DATA, p_msg); |
| return true; |
| } else |
| return false; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_ucd_process_event |
| * |
| * Description This is called from main state machine when LCID is |
| * connectionless. Process the event if it is for UCD. |
| * |
| * Return true if the event is consumed by UCD |
| * false if the event needs to be processed by the main state |
| * machine |
| * |
| ******************************************************************************/ |
| bool l2c_ucd_process_event(tL2C_CCB* p_ccb, uint16_t event, void* p_data) { |
| /* if the event is not processed by this function, this variable will be set |
| * to false */ |
| bool done = true; |
| |
| switch (p_ccb->chnl_state) { |
| case CST_CLOSED: |
| switch (event) { |
| case L2CEVT_LP_CONNECT_CFM: /* Link came up */ |
| /* check if waiting for UCD info */ |
| if (!l2c_ucd_check_pending_info_req(p_ccb)) { |
| /* check if any outgoing UCD packet is waiting security check */ |
| if (!l2c_ucd_check_pending_out_sec_q(p_ccb)) { |
| p_ccb->chnl_state = CST_OPEN; |
| } |
| } |
| break; |
| |
| case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */ |
| fixed_queue_enqueue(p_ccb->p_lcb->ucd_in_sec_pending_q, p_data); |
| break; |
| |
| case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */ |
| l2c_ucd_enqueue_pending_out_sec_q(p_ccb, p_data); |
| break; |
| |
| case L2CEVT_L2CAP_INFO_RSP: |
| /* check if waiting for UCD info */ |
| if (!l2c_ucd_check_pending_info_req(p_ccb)) { |
| /* check if any outgoing UCD packet is waiting security check */ |
| if (!l2c_ucd_check_pending_out_sec_q(p_ccb)) { |
| p_ccb->chnl_state = CST_OPEN; |
| } |
| } |
| break; |
| |
| default: |
| done = false; /* main state machine continues to process event */ |
| break; |
| } |
| break; |
| |
| case CST_ORIG_W4_SEC_COMP: |
| switch (event) { |
| case L2CEVT_SEC_RE_SEND_CMD: /* BTM has enough info to proceed */ |
| /* check if any outgoing UCD packet is waiting security check */ |
| if (!l2c_ucd_check_pending_out_sec_q(p_ccb)) { |
| p_ccb->chnl_state = CST_OPEN; |
| } |
| break; |
| |
| case L2CEVT_SEC_COMP: /* Security completed success */ |
| p_ccb->chnl_state = CST_OPEN; |
| l2c_ucd_send_pending_out_sec_q(p_ccb); |
| |
| if (!fixed_queue_is_empty(p_ccb->p_lcb->ucd_out_sec_pending_q)) { |
| /* start a timer to send next UCD packet in OPEN state */ |
| /* it will prevent stack overflow */ |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, 0, l2c_ccb_timer_timeout, |
| p_ccb); |
| } else { |
| /* start a timer for idle timeout of UCD */ |
| period_ms_t timeout_ms = p_ccb->fixed_chnl_idle_tout * 1000; |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, timeout_ms, |
| l2c_ccb_timer_timeout, p_ccb); |
| } |
| break; |
| |
| case L2CEVT_SEC_COMP_NEG: |
| p_ccb->chnl_state = CST_OPEN; |
| l2c_ucd_discard_pending_out_sec_q(p_ccb); |
| |
| /* start a timer for idle timeout of UCD */ |
| period_ms_t timeout_ms = p_ccb->fixed_chnl_idle_tout * 1000; |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, timeout_ms, |
| l2c_ccb_timer_timeout, p_ccb); |
| break; |
| |
| case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */ |
| l2c_ucd_enqueue_pending_out_sec_q(p_ccb, p_data); |
| break; |
| |
| case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */ |
| fixed_queue_enqueue(p_ccb->p_lcb->ucd_in_sec_pending_q, p_data); |
| break; |
| |
| case L2CEVT_L2CAP_INFO_RSP: |
| /* check if waiting for UCD info */ |
| l2c_ucd_check_pending_info_req(p_ccb); |
| break; |
| |
| default: |
| done = false; /* main state machine continues to process event */ |
| break; |
| } |
| break; |
| |
| case CST_TERM_W4_SEC_COMP: |
| switch (event) { |
| case L2CEVT_SEC_COMP: |
| p_ccb->chnl_state = CST_OPEN; |
| l2c_ucd_send_pending_in_sec_q(p_ccb); |
| |
| if (!fixed_queue_is_empty(p_ccb->p_lcb->ucd_in_sec_pending_q)) { |
| /* start a timer to check next UCD packet in OPEN state */ |
| /* it will prevent stack overflow */ |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, 0, l2c_ccb_timer_timeout, |
| p_ccb); |
| } else { |
| /* start a timer for idle timeout of UCD */ |
| period_ms_t timeout_ms = p_ccb->fixed_chnl_idle_tout * 1000; |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, timeout_ms, |
| l2c_ccb_timer_timeout, p_ccb); |
| } |
| break; |
| |
| case L2CEVT_SEC_COMP_NEG: |
| if (((tL2C_CONN_INFO*)p_data)->status == BTM_DELAY_CHECK) { |
| done = false; |
| break; |
| } |
| p_ccb->chnl_state = CST_OPEN; |
| l2c_ucd_discard_pending_in_sec_q(p_ccb); |
| |
| /* start a timer for idle timeout of UCD */ |
| period_ms_t timeout_ms = p_ccb->fixed_chnl_idle_tout * 1000; |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, timeout_ms, |
| l2c_ccb_timer_timeout, p_ccb); |
| break; |
| |
| case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */ |
| l2c_ucd_enqueue_pending_out_sec_q(p_ccb, p_data); |
| break; |
| |
| case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */ |
| fixed_queue_enqueue(p_ccb->p_lcb->ucd_in_sec_pending_q, p_data); |
| break; |
| |
| case L2CEVT_SEC_RE_SEND_CMD: /* BTM has enough info to proceed */ |
| /* check if any incoming UCD packet is waiting security check */ |
| if (!l2c_ucd_check_pending_in_sec_q(p_ccb)) { |
| p_ccb->chnl_state = CST_OPEN; |
| } |
| break; |
| |
| case L2CEVT_L2CAP_INFO_RSP: |
| /* check if waiting for UCD info */ |
| l2c_ucd_check_pending_info_req(p_ccb); |
| break; |
| |
| default: |
| done = false; /* main state machine continues to process event */ |
| break; |
| } |
| break; |
| |
| case CST_OPEN: |
| switch (event) { |
| case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */ |
| /* stop idle timer of UCD */ |
| alarm_cancel(p_ccb->l2c_ccb_timer); |
| |
| fixed_queue_enqueue(p_ccb->p_lcb->ucd_in_sec_pending_q, p_data); |
| l2c_ucd_check_pending_in_sec_q(p_ccb); |
| break; |
| |
| case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */ |
| /* stop idle timer of UCD */ |
| alarm_cancel(p_ccb->l2c_ccb_timer); |
| |
| l2c_ucd_enqueue_pending_out_sec_q(p_ccb, p_data); |
| |
| /* success changes state, failure stays in current state */ |
| l2c_ucd_check_pending_out_sec_q(p_ccb); |
| break; |
| |
| case L2CEVT_TIMEOUT: |
| /* check if any UCD packet is waiting security check */ |
| if ((!l2c_ucd_check_pending_in_sec_q(p_ccb)) && |
| (!l2c_ucd_check_pending_out_sec_q(p_ccb))) { |
| l2cu_release_ccb(p_ccb); |
| } |
| break; |
| |
| case L2CEVT_L2CAP_INFO_RSP: |
| /* check if waiting for UCD info */ |
| l2c_ucd_check_pending_info_req(p_ccb); |
| break; |
| |
| default: |
| done = false; /* main state machine continues to process event */ |
| break; |
| } |
| break; |
| |
| default: |
| done = false; /* main state machine continues to process event */ |
| break; |
| } |
| |
| return done; |
| } |
| #endif /* (L2CAP_UCD_INCLUDED == TRUE) */ |
