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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 "stack/goep_common.h"
#include "stack/goepc_api.h"
#include "goep_int.h"
#if (GOEPC_INCLUDED == TRUE)
#if GOEP_DYNAMIC_MEMORY == FALSE
tGOEPC_CB goepc_cb;
#else
tGOEPC_CB *goepc_cb_ptr = NULL;
#endif
tGOEPC_CCB *goepc_allocate_ccb(void)
{
tGOEPC_CCB *p_ccb = NULL;
for (int i = 0; i < GOEPC_MAX_CONNECTION; ++i) {
if (!goepc_cb.ccb[i].allocated) {
goepc_cb.ccb[i].allocated = i + 1;
p_ccb = &goepc_cb.ccb[i];
break;
}
}
return p_ccb;
}
void goepc_free_ccb(tGOEPC_CCB *p_ccb)
{
if (p_ccb->pkt != NULL) {
osi_free(p_ccb->pkt);
}
memset(p_ccb, 0, sizeof(tGOEPC_CCB));
}
BOOLEAN goepc_check_obex_req_param(tOBEX_PARSE_INFO *info)
{
BOOLEAN ret = TRUE;
switch (info->opcode)
{
case OBEX_OPCODE_CONNECT:
if (info->max_packet_length < 255 || info->obex_version_number == 0) {
ret = FALSE;
}
break;
case OBEX_OPCODE_DISCONNECT:
case OBEX_OPCODE_PUT:
case OBEX_OPCODE_PUT_FINAL:
case OBEX_OPCODE_GET:
case OBEX_OPCODE_GET_FINAL:
case OBEX_OPCODE_SETPATH:
case OBEX_OPCODE_ACTION:
case OBEX_OPCODE_SESSION:
/* opcode allowed */
break;
case OBEX_OPCODE_ABORT:
default:
ret = FALSE;
/* opcode not allowed */
break;
}
return ret;
}
static tGOEPC_CCB *find_ccb_by_obex_handle(UINT16 obex_handle)
{
tGOEPC_CCB *p_ccb = NULL;
for (int i = 0; i < GOEPC_MAX_CONNECTION; ++i) {
if (goepc_cb.ccb[i].allocated && goepc_cb.ccb[i].obex_handle == obex_handle) {
p_ccb = &goepc_cb.ccb[i];
}
}
return p_ccb;
}
static void goepc_extra_srm_rsp(UINT8 opcode, BT_HDR *pkt, BOOLEAN *srm_en, BOOLEAN *srm_wait)
{
tOBEX_PARSE_INFO info;
BOOLEAN srm_found = FALSE;
BOOLEAN srmp_found = FALSE;
if (OBEX_ParseResponse(pkt, opcode, &info) == OBEX_SUCCESS) {
UINT8 *header = NULL;
while((header = OBEX_GetNextHeader(pkt, &info)) != NULL) {
switch (*header)
{
case OBEX_HEADER_ID_SRM:
if (header[1] == OBEX_SRM_ENABLE) {
*srm_en = TRUE;
}
srm_found = TRUE;
break;
case OBEX_HEADER_ID_SRM_PARAM:
switch (header[1])
{
case OBEX_SRMP_ADD_PKT:
/* goep should not use this */
break;
case OBEX_SRMP_WAIT:
*srm_wait = TRUE;
break;
case OBEX_SRMP_ADD_PKT_WAIT:
/* goep should not use this */
break;
default:
break;
}
srmp_found = TRUE;
break;
default:
break;
}
if (srm_found && srmp_found) {
break;
}
}
}
}
static void goepc_act_congest(tGOEPC_CCB *p_ccb)
{
p_ccb->congest = TRUE;
p_ccb->callback(p_ccb->allocated, GOEPC_CONGEST_EVT, NULL);
}
static void goepc_act_uncongest(tGOEPC_CCB *p_ccb)
{
p_ccb->congest = FALSE;
p_ccb->callback(p_ccb->allocated, GOEPC_UNCONGEST_EVT, NULL);
}
static void goepc_act_mtu_chg(tGOEPC_CCB *p_ccb, tGOEPC_MTU_CHG *mtu_chg)
{
tGOEPC_MSG msg;
msg.mtu_changed.peer_mtu = mtu_chg->peer_mtu;
msg.mtu_changed.our_mtu = mtu_chg->our_mtu;
p_ccb->peer_mtu = mtu_chg->peer_mtu;
p_ccb->our_mtu = mtu_chg->our_mtu;
p_ccb->callback(p_ccb->allocated, GOEPC_MTU_CHANGED_EVT, &msg);
}
void goepc_obex_callback(UINT16 handle, UINT8 event, tOBEX_MSG *msg)
{
tGOEPC_DATA data;
UINT8 goepc_sm_event = GOEPC_SM_EVENT_DISCONNECT;
BOOLEAN exec_sm = FALSE;
tGOEPC_CCB *p_ccb = find_ccb_by_obex_handle(handle);
if (p_ccb == NULL) {
GOEPC_TRACE_ERROR("goepc_obex_callback can not find a ccb\n");
/* can not find a ccb in goepc, free resource and remove this connection */
if (event == OBEX_DATA_EVT && msg->data.pkt) {
osi_free(msg->data.pkt);
}
OBEX_RemoveConn(handle);
return;
}
switch (event)
{
case OBEX_CONNECT_EVT:
data.connected.peer_mtu = msg->connect.peer_mtu;
data.connected.our_mtu = msg->connect.our_mtu;
goepc_sm_event = GOEPC_SM_EVENT_CONNECT;
exec_sm = TRUE;
break;
case OBEX_MTU_CHANGE_EVT:
data.mtu_chg.peer_mtu = msg->mtu_change.peer_mtu;
data.mtu_chg.our_mtu = msg->mtu_change.our_mtu;
goepc_act_mtu_chg(p_ccb, &data.mtu_chg);
break;
case OBEX_DISCONNECT_EVT:
/* when we received this event, obex connection already disconnect */
p_ccb->obex_handle = 0;
goepc_sm_event = GOEPC_SM_EVENT_DISCONNECT;;
exec_sm = TRUE;
break;
case OBEX_CONGEST_EVT:
goepc_act_congest(p_ccb);
break;
case OBEX_UNCONGEST_EVT:
goepc_act_uncongest(p_ccb);
break;
case OBEX_DATA_EVT:
data.pkt = msg->data.pkt;
if (OBEX_CheckContinueResponse(data.pkt)) {
/* in OBEX 1.0, final bit of response code will always set, we need to check this */
goepc_sm_event = GOEPC_SM_EVENT_RSP;
}
else if (OBEX_CheckFinalBit(data.pkt)) {
goepc_sm_event = GOEPC_SM_EVENT_RSP_FB;
}
else {
goepc_sm_event = GOEPC_SM_EVENT_RSP;
}
exec_sm = TRUE;
break;
default:
/* other event, ignore */
break;
}
if (exec_sm) {
goepc_sm_execute(p_ccb, goepc_sm_event, &data);
}
}
static void goepc_sm_act_connect(tGOEPC_CCB *p_ccb, tGOEPC_CONNECTED *connected)
{
tGOEPC_MSG msg;
msg.opened.peer_mtu = connected->peer_mtu;
msg.opened.our_mtu = connected->our_mtu;
p_ccb->peer_mtu = connected->peer_mtu;
p_ccb->our_mtu = connected->our_mtu;
/* main state machine transfer to OPENED_IDLE */
p_ccb->state = GOEPC_STATE_OPENED_IDLE;
p_ccb->callback(p_ccb->allocated, GOEPC_OPENED_EVT, &msg);
}
static void goepc_sm_act_disconnect(tGOEPC_CCB *p_ccb)
{
tGOEPC_MSG msg;
if (p_ccb->obex_handle) {
OBEX_RemoveConn(p_ccb->obex_handle);
}
msg.closed.reason = GOEP_TL_ERROR;
p_ccb->callback(p_ccb->allocated, GOEPC_CLOSED_EVT, &msg);
/* free ccb, main state machine end */
goepc_free_ccb(p_ccb);
}
static void goepc_sm_act_send_req(tGOEPC_CCB *p_ccb, BT_HDR *pkt)
{
UINT16 ret = OBEX_SendPacket(p_ccb->obex_handle, pkt);
if (ret == OBEX_SUCCESS) {
/* main state machine transfer to OPENED_REQ */
p_ccb->state = GOEPC_STATE_OPENED_REQ;
}
else {
/* send failed, something error in transport layer, disconnect */
goepc_sm_act_disconnect(p_ccb);
}
}
static void goepc_sm_act_send_req_fb(tGOEPC_CCB *p_ccb, BT_HDR *pkt)
{
UINT16 ret = OBEX_SendPacket(p_ccb->obex_handle, pkt);
if (ret == OBEX_SUCCESS) {
/* main state machine transfer to OPENED_RSP */
p_ccb->state = GOEPC_STATE_OPENED_RSP;
}
else {
/* send failed, something error in transport layer, disconnect */
goepc_sm_act_disconnect(p_ccb);
}
}
static void goepc_sm_act_rsp(tGOEPC_CCB *p_ccb, BT_HDR *pkt)
{
/* handle srm state transfer */
BOOLEAN srm_en = FALSE;
BOOLEAN srm_wait = FALSE;
goepc_extra_srm_rsp(p_ccb->last_pkt_opcode, pkt, &srm_en, &srm_wait);
goepc_srm_sm_execute(p_ccb, FALSE, srm_en, srm_wait);
/* main state machine not change */
tGOEPC_MSG msg;
msg.response.opcode = p_ccb->last_pkt_opcode;
msg.response.final = FALSE;
msg.response.srm_en = (p_ccb->srm_state == GOEPC_SRM_STATE_ENABLE_WAIT || p_ccb->srm_state == GOEPC_SRM_STATE_ENABLE);
msg.response.srm_wait = (p_ccb->srm_state == GOEPC_SRM_STATE_ENABLE_WAIT);
msg.response.pkt = pkt;
p_ccb->callback(p_ccb->allocated, GOEPC_RESPONSE_EVT, &msg);
}
static void goepc_sm_act_rsp_fb(tGOEPC_CCB *p_ccb, BT_HDR *pkt)
{
tGOEPC_MSG msg;
msg.response.opcode = p_ccb->last_pkt_opcode;
msg.response.final = TRUE;
msg.response.srm_en = FALSE;
msg.response.srm_wait = FALSE;
msg.response.pkt = pkt;
/* operation complete, reset srm state */
p_ccb->srm_state = GOEPC_SRM_STATE_IDLE;
/* main state machine transfer to OPENED_IDLE */
p_ccb->state = GOEPC_STATE_OPENED_IDLE;
p_ccb->callback(p_ccb->allocated, GOEPC_RESPONSE_EVT, &msg);
}
static void goepc_sm_state_opening(tGOEPC_CCB *p_ccb, UINT8 event, tGOEPC_DATA *p_data)
{
switch (event)
{
case GOEPC_SM_EVENT_CONNECT:
goepc_sm_act_connect(p_ccb, &p_data->connected);
break;
case GOEPC_SM_EVENT_DISCONNECT:
goepc_sm_act_disconnect(p_ccb);
break;
case GOEPC_SM_EVENT_RSP:
case GOEPC_SM_EVENT_RSP_FB:
GOEPC_TRACE_ERROR("goepc_sm_state_opening received unexpected response from peer\n");
if (p_data->pkt != NULL) {
osi_free(p_data->pkt);
}
goepc_sm_act_disconnect(p_ccb);
break;
default:
GOEPC_TRACE_ERROR("goepc_sm_state_opening unexpected event: 0x%x\n", event);
break;
}
}
static void goepc_sm_state_opened_idle(tGOEPC_CCB *p_ccb, UINT8 event, tGOEPC_DATA *p_data)
{
switch (event)
{
case GOEPC_SM_EVENT_DISCONNECT:
goepc_sm_act_disconnect(p_ccb);
break;
case GOEPC_SM_EVENT_REQ:
goepc_sm_act_send_req(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_REQ_FB:
goepc_sm_act_send_req_fb(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_RSP:
case GOEPC_SM_EVENT_RSP_FB:
GOEPC_TRACE_ERROR("goepc_sm_state_opened_idle received unexpected response from peer\n");
/* peer sent a packet to us when we didn't request */
if (p_data->pkt != NULL) {
osi_free(p_data->pkt);
}
goepc_sm_act_disconnect(p_ccb);
break;
default:
GOEPC_TRACE_ERROR("goepc_sm_state_opened_idle unexpected event: 0x%x\n", event);
break;
}
}
static void goepc_sm_state_opened_req(tGOEPC_CCB *p_ccb, UINT8 event, tGOEPC_DATA *p_data)
{
switch (event)
{
case GOEPC_SM_EVENT_DISCONNECT:
goepc_sm_act_disconnect(p_ccb);
break;
case GOEPC_SM_EVENT_REQ:
goepc_sm_act_send_req(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_REQ_FB:
goepc_sm_act_send_req_fb(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_RSP:
goepc_sm_act_rsp(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_RSP_FB:
goepc_sm_act_rsp_fb(p_ccb, p_data->pkt);
break;
default:
GOEPC_TRACE_ERROR("goepc_sm_state_opened_req unexpected event: 0x%x\n", event);
break;
}
}
static void goepc_sm_state_opened_rsp(tGOEPC_CCB *p_ccb, UINT8 event, tGOEPC_DATA *p_data)
{
switch (event)
{
case GOEPC_SM_EVENT_DISCONNECT:
goepc_sm_act_disconnect(p_ccb);
break;
case GOEPC_SM_EVENT_REQ_FB:
goepc_sm_act_send_req_fb(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_RSP:
goepc_sm_act_rsp(p_ccb, p_data->pkt);
break;
case GOEPC_SM_EVENT_RSP_FB:
goepc_sm_act_rsp_fb(p_ccb, p_data->pkt);
break;
default:
GOEPC_TRACE_ERROR("goepc_sm_state_opened_rsp unexpected event: 0x%x\n", event);
break;
}
}
BOOLEAN goepc_check_obex_req_allow(UINT8 state, BOOLEAN final)
{
BOOLEAN ret = FALSE;
if (final) {
switch (state)
{
case GOEPC_STATE_OPENED_IDLE:
case GOEPC_STATE_OPENED_REQ:
case GOEPC_STATE_OPENED_RSP:
ret = TRUE;
break;
default:
break;
}
}
else {
switch (state)
{
case GOEPC_STATE_OPENED_IDLE:
case GOEPC_STATE_OPENED_REQ:
ret = TRUE;
break;
default:
break;
}
}
return ret;
}
void goepc_sm_execute(tGOEPC_CCB *p_ccb, UINT8 event, tGOEPC_DATA *p_data)
{
switch (p_ccb->state)
{
case GOEPC_STATE_INIT:
/* do nothing */
break;
case GOEPC_STATE_OPENING:
goepc_sm_state_opening(p_ccb, event, p_data);
break;
case GOEPC_STATE_OPENED_IDLE:
goepc_sm_state_opened_idle(p_ccb, event, p_data);
break;
case GOEPC_STATE_OPENED_REQ:
goepc_sm_state_opened_req(p_ccb, event, p_data);
break;
case GOEPC_STATE_OPENED_RSP:
goepc_sm_state_opened_rsp(p_ccb, event, p_data);
break;
default:
GOEPC_TRACE_ERROR("goepc_sm_execute unexpected state: 0x%x\n", p_ccb->state);
break;
}
}
static void goepc_srm_sm_act_req(tGOEPC_CCB *p_ccb, BOOLEAN srm_en, BOOLEAN srm_wait)
{
switch (p_ccb->srm_state)
{
case GOEPC_SRM_STATE_IDLE:
if (srm_en) {
p_ccb->srm_state = GOEPC_SRM_STATE_REQ;
p_ccb->srm_wait = srm_wait;
}
else {
p_ccb->srm_state = GOEPC_SRM_STATE_DISABLE;
}
break;
case GOEPC_SRM_STATE_ENABLE_WAIT:
if (!srm_wait) {
p_ccb->srm_wait = FALSE;
}
if (!p_ccb->srm_wait && !p_ccb->srm_peer_wait) {
/* no more wait, transfer to ENABLE */
p_ccb->srm_state = GOEPC_SRM_STATE_ENABLE;
}
break;
default:
break;
}
}
static void goepc_srm_sm_act_rsp(tGOEPC_CCB *p_ccb, BOOLEAN srm_en, BOOLEAN srm_wait)
{
switch (p_ccb->srm_state)
{
case GOEPC_SRM_STATE_IDLE:
/* peer can not request to enable srm, ignore */
break;
case GOEPC_SRM_STATE_REQ:
if (srm_en) {
p_ccb->srm_peer_wait = srm_wait;
if (p_ccb->srm_wait || p_ccb->srm_peer_wait) {
p_ccb->srm_state = GOEPC_SRM_STATE_ENABLE_WAIT;
}
else {
p_ccb->srm_state = GOEPC_SRM_STATE_ENABLE;
}
}
else {
p_ccb->srm_state = GOEPC_SRM_STATE_DISABLE;
}
break;
case GOEPC_SRM_STATE_ENABLE_WAIT:
if (!srm_wait) {
p_ccb->srm_peer_wait = FALSE;
}
if (!p_ccb->srm_wait && !p_ccb->srm_peer_wait) {
/* no more wait, transfer to ENABLE */
p_ccb->srm_state = GOEPC_SRM_STATE_ENABLE;
}
break;
default:
break;
}
}
void goepc_srm_sm_execute(tGOEPC_CCB *p_ccb, BOOLEAN is_req, BOOLEAN srm_en, BOOLEAN srm_wait)
{
if (is_req) {
goepc_srm_sm_act_req(p_ccb, srm_en, srm_wait);
}
else {
goepc_srm_sm_act_rsp(p_ccb, srm_en, srm_wait);
}
}
#endif /* #if (GOEPC_INCLUDED == TRUE) */
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