/****************************************************************************** * * Copyright (C) 2003-2012 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 AVCTP module interfaces to L2CAP * ******************************************************************************/ #include <string.h> #include "stack/bt_types.h" #include "common/bt_target.h" #include "common/bt_defs.h" #include "stack/avct_api.h" #include "avct_int.h" #include "stack/l2c_api.h" #include "stack/l2cdefs.h" #include "osi/allocator.h" #if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE) /* Configuration flags. */ #define AVCT_L2C_CFG_IND_DONE (1<<0) #define AVCT_L2C_CFG_CFM_DONE (1<<1) /* callback function declarations */ void avct_l2c_connect_ind_cback(BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id); void avct_l2c_connect_cfm_cback(UINT16 lcid, UINT16 result); void avct_l2c_config_cfm_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg); void avct_l2c_config_ind_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg); void avct_l2c_disconnect_ind_cback(UINT16 lcid, BOOLEAN ack_needed); void avct_l2c_disconnect_cfm_cback(UINT16 lcid, UINT16 result); void avct_l2c_congestion_ind_cback(UINT16 lcid, BOOLEAN is_congested); void avct_l2c_data_ind_cback(UINT16 lcid, BT_HDR *p_buf); /* L2CAP callback function structure */ const tL2CAP_APPL_INFO avct_l2c_appl = { avct_l2c_connect_ind_cback, avct_l2c_connect_cfm_cback, NULL, avct_l2c_config_ind_cback, avct_l2c_config_cfm_cback, avct_l2c_disconnect_ind_cback, avct_l2c_disconnect_cfm_cback, NULL, avct_l2c_data_ind_cback, avct_l2c_congestion_ind_cback, NULL /* tL2CA_TX_COMPLETE_CB */ }; /******************************************************************************* ** ** Function avct_l2c_is_passive ** ** Description check is the CCB associated with the given LCB was created ** as passive ** ** Returns TRUE, if the given LCB is created as AVCT_PASSIVE ** *******************************************************************************/ static BOOLEAN avct_l2c_is_passive (tAVCT_LCB *p_lcb) { BOOLEAN is_passive = FALSE; tAVCT_CCB *p_ccb = &avct_cb.ccb[0]; int i; for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) { if (p_ccb->allocated && (p_ccb->p_lcb == p_lcb)) { AVCT_TRACE_DEBUG("avct_l2c_is_ct control:x%x", p_ccb->cc.control); if (p_ccb->cc.control & AVCT_PASSIVE) { is_passive = TRUE; break; } } } return is_passive; } /******************************************************************************* ** ** Function avct_l2c_connect_ind_cback ** ** Description This is the L2CAP connect indication callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_connect_ind_cback(BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id) { tAVCT_LCB *p_lcb; UINT16 result = L2CAP_CONN_OK; tL2CAP_CFG_INFO cfg; UNUSED(psm); /* do we already have a channel for this peer? */ if ((p_lcb = avct_lcb_by_bd(bd_addr)) == NULL) { /* no, allocate lcb */ if ((p_lcb = avct_lcb_alloc(bd_addr)) == NULL) { /* no ccb available, reject L2CAP connection */ result = L2CAP_CONN_NO_RESOURCES; } } /* else we already have a channel for this peer */ else { if (!avct_l2c_is_passive (p_lcb) || (p_lcb->ch_state == AVCT_CH_OPEN)) { /* this LCB included CT role - reject */ result = L2CAP_CONN_NO_RESOURCES; } else { /* TG role only - accept the connection from CT. move the channel ID to the conflict list */ p_lcb->conflict_lcid = p_lcb->ch_lcid; AVCT_TRACE_DEBUG("avct_l2c_connect_ind_cback conflict_lcid:0x%x", p_lcb->conflict_lcid); } } if (p_lcb) { AVCT_TRACE_DEBUG("avct_l2c_connect_ind_cback: 0x%x, res: %d, ch_state: %d", lcid, result, p_lcb->ch_state); } /* Send L2CAP connect rsp */ L2CA_ConnectRsp(bd_addr, id, lcid, result, 0); /* if result ok, proceed with connection */ if (result == L2CAP_CONN_OK) { /* store LCID */ p_lcb->ch_lcid = lcid; /* transition to configuration state */ p_lcb->ch_state = AVCT_CH_CFG; /* Send L2CAP config req */ memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO)); cfg.mtu_present = TRUE; cfg.mtu = avct_cb.mtu; L2CA_ConfigReq(lcid, &cfg); AVCT_TRACE_DEBUG("avct_l2c snd Cfg Req"); } #if (BT_USE_TRACES == TRUE) if (p_lcb) { AVCT_TRACE_DEBUG("ch_state cni: %d ", p_lcb->ch_state); } #endif } /******************************************************************************* ** ** Function avct_l2c_connect_cfm_cback ** ** Description This is the L2CAP connect confirm callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_connect_cfm_cback(UINT16 lcid, UINT16 result) { tAVCT_LCB *p_lcb; tL2CAP_CFG_INFO cfg; /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { AVCT_TRACE_DEBUG("avct_l2c_connect_cfm_cback lcid:0x%x result: %d ch_state: %d, conflict_lcid:0x%x", lcid, result, p_lcb->ch_state, p_lcb->conflict_lcid); /* if in correct state */ if (p_lcb->ch_state == AVCT_CH_CONN) { /* if result successful */ if (result == L2CAP_CONN_OK) { /* set channel state */ p_lcb->ch_state = AVCT_CH_CFG; /* Send L2CAP config req */ memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO)); cfg.mtu_present = TRUE; cfg.mtu = avct_cb.mtu; L2CA_ConfigReq(lcid, &cfg); AVCT_TRACE_DEBUG("avct_l2c snd Cfg Req"); } /* else failure */ else { AVCT_TRACE_DEBUG("avct_l2c_connect_cfm_cback conflict_lcid:0x%x", p_lcb->conflict_lcid); if (p_lcb->conflict_lcid == lcid) { p_lcb->conflict_lcid = 0; } else { avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &result); } } } else if (p_lcb->conflict_lcid == lcid) { /* we must be in AVCT_CH_CFG state for the ch_lcid channel */ AVCT_TRACE_DEBUG("avct_l2c_connect_cfm_cback ch_state: %d, conflict_lcid:0x%x", p_lcb->ch_state, p_lcb->conflict_lcid); if (result == L2CAP_CONN_OK) { /* just in case the peer also accepts our connection - Send L2CAP disconnect req */ L2CA_DisconnectReq(lcid); } p_lcb->conflict_lcid = 0; } AVCT_TRACE_DEBUG("ch_state cnc: %d ", p_lcb->ch_state); } } /******************************************************************************* ** ** Function avct_l2c_config_cfm_cback ** ** Description This is the L2CAP config confirm callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_config_cfm_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg) { tAVCT_LCB *p_lcb; /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { AVCT_TRACE_DEBUG("avct_l2c_config_cfm_cback: 0x%x, ch_state: %d, res: %d", lcid, p_lcb->ch_state, p_cfg->result); /* if in correct state */ if (p_lcb->ch_state == AVCT_CH_CFG) { /* if result successful */ if (p_cfg->result == L2CAP_CFG_OK) { /* update flags */ p_lcb->ch_flags |= AVCT_L2C_CFG_CFM_DONE; /* if configuration complete */ if (p_lcb->ch_flags & AVCT_L2C_CFG_IND_DONE) { p_lcb->ch_state = AVCT_CH_OPEN; avct_lcb_event(p_lcb, AVCT_LCB_LL_OPEN_EVT, NULL); } } /* else failure */ else { AVCT_TRACE_DEBUG("ERROR avct_l2c_config_cfm_cback L2CA_DisconnectReq %d ", p_lcb->ch_state); /* store result value */ p_lcb->ch_result = p_cfg->result; /* Send L2CAP disconnect req */ L2CA_DisconnectReq(lcid); } } AVCT_TRACE_DEBUG("ch_state cfc: %d ", p_lcb->ch_state); } } /******************************************************************************* ** ** Function avct_l2c_config_ind_cback ** ** Description This is the L2CAP config indication callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_config_ind_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg) { tAVCT_LCB *p_lcb; /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { AVCT_TRACE_DEBUG("avct_l2c_config_ind_cback: 0x%x, ch_state: %d", lcid, p_lcb->ch_state); /* store the mtu in tbl */ if (p_cfg->mtu_present) { p_lcb->peer_mtu = p_cfg->mtu; } else { p_lcb->peer_mtu = L2CAP_DEFAULT_MTU; } /* send L2CAP configure response */ memset(p_cfg, 0, sizeof(tL2CAP_CFG_INFO)); p_cfg->result = L2CAP_CFG_OK; L2CA_ConfigRsp(lcid, p_cfg); /* if first config ind */ if ((p_lcb->ch_flags & AVCT_L2C_CFG_IND_DONE) == 0) { /* update flags */ p_lcb->ch_flags |= AVCT_L2C_CFG_IND_DONE; /* if configuration complete */ if (p_lcb->ch_flags & AVCT_L2C_CFG_CFM_DONE) { p_lcb->ch_state = AVCT_CH_OPEN; avct_lcb_event(p_lcb, AVCT_LCB_LL_OPEN_EVT, NULL); } } AVCT_TRACE_DEBUG("ch_state cfi: %d ", p_lcb->ch_state); } } /******************************************************************************* ** ** Function avct_l2c_disconnect_ind_cback ** ** Description This is the L2CAP disconnect indication callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_disconnect_ind_cback(UINT16 lcid, BOOLEAN ack_needed) { tAVCT_LCB *p_lcb; UINT16 result = AVCT_RESULT_FAIL; /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { AVCT_TRACE_DEBUG("avct_l2c_disconnect_ind_cback: 0x%x, ch_state: %d", lcid, p_lcb->ch_state); if (ack_needed) { /* send L2CAP disconnect response */ L2CA_DisconnectRsp(lcid); } avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &result); AVCT_TRACE_DEBUG("ch_state di: %d ", p_lcb->ch_state); } } /******************************************************************************* ** ** Function avct_l2c_disconnect_cfm_cback ** ** Description This is the L2CAP disconnect confirm callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_disconnect_cfm_cback(UINT16 lcid, UINT16 result) { tAVCT_LCB *p_lcb; UINT16 res; /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { AVCT_TRACE_DEBUG("avct_l2c_disconnect_cfm_cback: 0x%x, ch_state: %d, res: %d", lcid, p_lcb->ch_state, result); /* result value may be previously stored */ res = (p_lcb->ch_result != 0) ? p_lcb->ch_result : result; p_lcb->ch_result = 0; avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &res); AVCT_TRACE_DEBUG("ch_state dc: %d ", p_lcb->ch_state); } } /******************************************************************************* ** ** Function avct_l2c_congestion_ind_cback ** ** Description This is the L2CAP congestion indication callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_congestion_ind_cback(UINT16 lcid, BOOLEAN is_congested) { tAVCT_LCB *p_lcb; AVCT_TRACE_DEBUG("avct_l2c_congestion_ind_cback: 0x%x", lcid); /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { avct_lcb_event(p_lcb, AVCT_LCB_LL_CONG_EVT, (tAVCT_LCB_EVT *) &is_congested); } } /******************************************************************************* ** ** Function avct_l2c_data_ind_cback ** ** Description This is the L2CAP data indication callback function. ** ** ** Returns void ** *******************************************************************************/ void avct_l2c_data_ind_cback(UINT16 lcid, BT_HDR *p_buf) { tAVCT_LCB *p_lcb; AVCT_TRACE_DEBUG("avct_l2c_data_ind_cback: 0x%x", lcid); /* look up lcb for this channel */ if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) { avct_lcb_event(p_lcb, AVCT_LCB_LL_MSG_EVT, (tAVCT_LCB_EVT *) &p_buf); } else { /* prevent buffer leak */ AVCT_TRACE_WARNING("ERROR -> avct_l2c_data_ind_cback drop buffer"); osi_free(p_buf); } } #endif /* #if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE) */