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/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "osi/osi.h"
#include "osi/allocator.h"
#include "common/bt_target.h"
#include "stack/obex_api.h"
#include "obex_int.h"
#include "obex_tl.h"
#if (OBEX_INCLUDED == TRUE)
#if OBEX_DYNAMIC_MEMORY == FALSE
tOBEX_CB obex_cb;
#else
tOBEX_CB *obex_cb_ptr = NULL;
#endif
static tOBEX_CCB *obex_find_ccb_by_tl_hdl(UINT8 tl, UINT16 tl_hdl)
{
tOBEX_CCB *p_ccb = NULL;
for (int i = 0; i < OBEX_MAX_CONNECTION; ++i) {
if (obex_cb.ccb[i].allocated && obex_cb.ccb[i].tl == tl && obex_cb.ccb[i].tl_hdl == tl_hdl) {
p_ccb = &obex_cb.ccb[i];
break;
}
}
return p_ccb;
}
static tOBEX_SCB *obex_find_scb_by_tl_hdl(UINT8 tl, UINT16 tl_hdl)
{
tOBEX_SCB *p_scb = NULL;
for (int i = 0; i < OBEX_MAX_SERVER; ++i) {
if (obex_cb.scb[i].allocated && obex_cb.scb[i].tl == tl && obex_cb.scb[i].tl_hdl == tl_hdl) {
p_scb = &obex_cb.scb[i];
break;
}
}
return p_scb;
}
tOBEX_CCB *obex_allocate_ccb(void)
{
tOBEX_CCB *p_ccb = NULL;
for (int i = 0; i < OBEX_MAX_CONNECTION; ++i) {
if (!obex_cb.ccb[i].allocated) {
obex_cb.ccb[i].allocated = i + 1;
p_ccb = &obex_cb.ccb[i];
break;
}
}
return p_ccb;
}
void obex_free_ccb(tOBEX_CCB *p_ccb)
{
assert(p_ccb->allocated != 0);
memset(p_ccb, 0, sizeof(tOBEX_CCB));
}
tOBEX_SCB *obex_allocate_scb(void)
{
tOBEX_SCB *p_scb = NULL;
for (int i = 0; i < OBEX_MAX_SERVER; ++i) {
if (!obex_cb.scb[i].allocated) {
obex_cb.scb[i].allocated = i + 1;
p_scb = &obex_cb.scb[i];
break;
}
}
return p_scb;
}
void obex_free_scb(tOBEX_SCB *p_scb)
{
assert(p_scb->allocated != 0);
memset(p_scb, 0, sizeof(tOBEX_SCB));
}
/* check whether connection mtu is valid, if not, disconnect it */
static bool check_conn_mtu_valid(tOBEX_CCB *p_ccb, BOOLEAN call_cb)
{
if (p_ccb->tl_our_mtu < 255 || p_ccb->tl_peer_mtu < 255) {
if (call_cb && p_ccb->callback) {
p_ccb->callback(p_ccb->allocated, OBEX_DISCONNECT_EVT, NULL);
}
OBEX_TRACE_ERROR("Check OBEX transport layer MTU failed, disconnect");
obex_cb.tl_ops[p_ccb->tl]->disconnect(p_ccb->tl_hdl);
obex_free_ccb(p_ccb);
return false;
}
return true;
}
void obex_tl_evt_handler(UINT8 tl, tOBEX_TL_EVT evt, tOBEX_TL_MSG *msg)
{
UINT16 tl_hdl = msg->any.hdl;
tOBEX_CCB *p_ccb = obex_find_ccb_by_tl_hdl(tl, tl_hdl);
tOBEX_SCB *p_scb = NULL;
tOBEX_MSG cb_msg = {0};
switch (evt)
{
case OBEX_TL_CONN_OPEN_EVT:
assert(p_ccb != NULL);
p_ccb->tl_peer_mtu = msg->conn_open.peer_mtu;
p_ccb->tl_our_mtu = msg->conn_open.our_mtu;
if (!check_conn_mtu_valid(p_ccb, TRUE)) {
break;
}
p_ccb->state = OBEX_STATE_OPENED;
if (p_ccb->callback) {
cb_msg.connect.peer_mtu = msg->conn_open.peer_mtu;
cb_msg.connect.our_mtu = msg->conn_open.our_mtu;
p_ccb->callback(p_ccb->allocated, OBEX_CONNECT_EVT, &cb_msg);
}
break;
case OBEX_TL_DIS_CONN_EVT:
if (p_ccb != NULL) {
if (p_ccb->callback) {
p_ccb->callback(p_ccb->allocated, OBEX_DISCONNECT_EVT, NULL);
}
obex_free_ccb(p_ccb);
}
break;
case OBEX_TL_CONGEST_EVT:
assert(p_ccb != NULL);
if (p_ccb->callback) {
p_ccb->callback(p_ccb->allocated, OBEX_CONGEST_EVT, NULL);
}
break;
case OBEX_TL_UNCONGEST_EVT:
assert(p_ccb != NULL);
if (p_ccb->callback) {
p_ccb->callback(p_ccb->allocated, OBEX_UNCONGEST_EVT, NULL);
}
break;
case OBEX_TL_MTU_CHANGE_EVT:
assert(p_ccb != NULL);
p_ccb->tl_peer_mtu = msg->mtu_chg.peer_mtu;
p_ccb->tl_our_mtu = msg->mtu_chg.our_mtu;
if (!check_conn_mtu_valid(p_ccb, TRUE)) {
break;
}
if (p_ccb->callback) {
cb_msg.mtu_change.peer_mtu = msg->mtu_chg.peer_mtu;
cb_msg.mtu_change.our_mtu = msg->mtu_chg.our_mtu;
p_ccb->callback(p_ccb->allocated, OBEX_MTU_CHANGE_EVT, &cb_msg);
}
break;
case OBEX_TL_DATA_EVT:
assert(p_ccb != NULL);
if (p_ccb->callback) {
cb_msg.data.pkt = msg->data.p_buf;
p_ccb->callback(p_ccb->allocated, OBEX_DATA_EVT, &cb_msg);
}
else {
/* No callback, just free the packet */
osi_free(msg->data.p_buf);
}
break;
case OBEX_TL_CONN_INCOME_EVT:
/* New connection, p_ccb should be NULL */
assert(p_ccb == NULL);
p_scb = obex_find_scb_by_tl_hdl(tl, msg->conn_income.svr_hdl);
if (p_scb == NULL) {
obex_cb.tl_ops[tl]->disconnect(tl_hdl);
break;
}
if ((p_ccb = obex_allocate_ccb()) == NULL) {
obex_cb.tl_ops[tl]->disconnect(tl_hdl);
break;
}
p_ccb->tl = tl;
p_ccb->tl_hdl = tl_hdl;
p_ccb->role = OBEX_ROLE_SERVER;
p_ccb->tl_peer_mtu = msg->conn_income.peer_mtu;
p_ccb->tl_our_mtu = msg->conn_income.our_mtu;
if (!check_conn_mtu_valid(p_ccb, FALSE)) {
break;
}
p_ccb->state = OBEX_STATE_OPENED;
p_ccb->callback = p_scb->callback;
if (p_ccb->callback) {
cb_msg.conn_income.svr_handle = p_scb->allocated << 8;
cb_msg.conn_income.peer_mtu = msg->conn_income.peer_mtu;
cb_msg.conn_income.our_mtu = msg->conn_income.our_mtu;
p_ccb->callback(p_ccb->allocated, OBEX_CONN_INCOME_EVT, &cb_msg);
}
break;
default:
OBEX_TRACE_ERROR("Unknown OBEX transport event: 0x%x\n", evt);
break;
}
}
void obex_tl_l2cap_callback(tOBEX_TL_EVT evt, tOBEX_TL_MSG *msg)
{
obex_tl_evt_handler(OBEX_OVER_L2CAP, evt, msg);
}
#endif /* #if (OBEX_INCLUDED == TRUE) */
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