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/*******************************************************************************
* Copyright (C) ST-Ericsson SA 2011
* License terms: 3-clause BSD license
******************************************************************************/
/**
* @addtogroup ldr_communication_serv
* @{
* @addtogroup r15_family
* @{
* @addtogroup command_protocol
* @{
*/
/*******************************************************************************
* Includes
******************************************************************************/
#include "t_basicdefinitions.h"
#include "r_command_protocol.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "r_communication_service.h"
#include "r_r15_family.h"
#include "r_r15_network_layer.h"
#include "r_r15_transport_layer.h"
#include "t_r15_header.h"
#include "t_security_algorithms.h"
#include "r_debug.h"
#include "r_debug_macro.h"
#include "r_r15_header.h"
/*******************************************************************************
* File scope types, constants and variables
******************************************************************************/
/*******************************************************************************
* Declaration of file local functions
******************************************************************************/
static ErrorCode_e ProcessAcknowledgement(Communication_t *Communication_p, const PacketMeta_t *Packet_p, const uint16 *const SessionState_p);
static ErrorCode_e ProcessCommand(Communication_t *Communication_p, PacketMeta_t *Packet_p, uint16 *SessionState);
static ErrorCode_e ProcessGeneralResponse(Communication_t *Communication_p, PacketMeta_t *Packet_p, uint16 *SessionState_p);
static ErrorCode_e SendAcknowledge(Communication_t *Communication_p, const PacketMeta_t *const Packet_p);
static uint16 GetSendSession(const Communication_t *const Communication_p, CommandData_t *CmdData_p);
static ErrorCode_e DispatchCommand(Communication_t *Communication_p, PacketMeta_t *Packet_p);
/*******************************************************************************
* Definition of external functions
******************************************************************************/
/*
* Reset the Session counters.
*
* @param [in] Communication_p Communication module context.
*
* @retval E_SUCCESS After successful execution.
*/
ErrorCode_e Do_R15_Command_ResetSessionCounters(const Communication_t *const Communication_p)
{
/* Iintialize the session counters */
R15_TRANSPORT(Communication_p)->SessionStateIn = 0;
R15_TRANSPORT(Communication_p)->SessionStateOut = 0;
return E_SUCCESS;
}
/*
* Sends command packet with command protocol.
*
* @param [in] Communication_p Communication module context.
* @param [in] CmdData_p Pointer to the command data.
*
* @retval E_SUCCESS After successful execution.
* @retval E_INVALID_INPUT_PARAMETERS If CmdData_p is NULL.
*/
ErrorCode_e Do_R15_Command_Send(Communication_t *Communication_p, CommandData_t *CmdData_p)
{
CommandExtendedHeader_t ExtendedHeader;
R15_Header_t Header;
SendData_LP_t Param;
if (NULL == CmdData_p) {
return E_INVALID_INPUT_PARAMETERS;
}
Param.Header_p = &Header;
Param.ExtendedHeader_p = &ExtendedHeader;
Param.Payload_p = CmdData_p->Payload.Data_p;
Header.Protocol = COMMAND_PROTOCOL;
Header.Flags = Communication_p->CurrentFamilyHash;
Header.PayloadLength = CmdData_p->Payload.Size;
Header.PayloadChecksum = 0;
Header.ExtendedHeaderLength = COMMAND_EXTENDED_HEADER_LENGTH;
Header.ExtendedHeaderChecksum = 0;
ExtendedHeader.SessionState = GetSendSession(Communication_p, CmdData_p);
ExtendedHeader.Command = CmdData_p->CommandNr;
ExtendedHeader.CommandGroup = CmdData_p->ApplicationNr;
// TODO: Don't we need a timer callback for this to actually do something?
Param.Time = R15_TIMEOUTS(Communication_p)->TCACK; //ACK_TIMEOUT_IN_MS;
Param.TimerCallBackFn_p = NULL; //NOTE: the timer will be assigned in "R15_Transport_Send"
C_(printf("command_protocol.c (%d): R15_Transport_Send! Type:%d Session:%d Command:%d CommandGroup:%d\n", __LINE__, CmdData_p->Type, ExtendedHeader.SessionState, ExtendedHeader.Command, ExtendedHeader.CommandGroup);)
return R15_Transport_Send(Communication_p, &Param);
}
/*
* Decode received command.
*
* @param [in] Communication_p Communication module context.
* @param [in] Packet_p Pointer to the received buffer.
*
* @retval E_SUCCESS After successful execution.
* @retval E_INVALID_INPUT_PARAMETERS if Packet_p is NULL.
*/
ErrorCode_e R15_Command_Process(Communication_t *Communication_p, PacketMeta_t *Packet_p)
{
ErrorCode_e ReturnValue = E_SUCCESS;
CommandExtendedHeader_t CommandExtendedHeader = {0};
if (NULL == Packet_p) {
return E_INVALID_INPUT_PARAMETERS;
}
R15_DeserializeCommandExtendedHeader(&CommandExtendedHeader, Packet_p->ExtendedHeader_p);
switch (CommandExtendedHeader.SessionState & MASK_SELECT_STATE) {
case COMMAND_PACKAGE:
ReturnValue = ProcessCommand(Communication_p, Packet_p, &(R15_TRANSPORT(Communication_p)->SessionStateIn));
break;
case ACK_PACKAGE:
ReturnValue = ProcessAcknowledgement(Communication_p, Packet_p, &(R15_TRANSPORT(Communication_p)->SessionStateOut));
break;
case GENERAL_RESPONSE_PACKAGE:
ReturnValue = ProcessGeneralResponse(Communication_p, Packet_p, &(R15_TRANSPORT(Communication_p)->SessionStateOut));
break;
case ACK_GENERAL_RESPONSE_PACKAGE:
ReturnValue = ProcessAcknowledgement(Communication_p, Packet_p, &(R15_TRANSPORT(Communication_p)->SessionStateIn));
break;
default:
ReturnValue = E_SUCCESS;
break;
}
return ReturnValue;
}
/*******************************************************************************
* Definition of internal functions
******************************************************************************/
static uint16 GetSendSession(const Communication_t *const Communication_p, CommandData_t *CmdData_p)
{
uint16 value;
if (CmdData_p->Type == GENERAL_RESPONSE) {
value = CmdData_p->SessionNr << 2 | GENERAL_RESPONSE_PACKAGE;
} else {
R15_TRANSPORT(Communication_p)->SessionStateOut += 4;
value = R15_TRANSPORT(Communication_p)->SessionStateOut;
CmdData_p->SessionNr = value >> 2;
}
return value;
}
static ErrorCode_e ProcessAcknowledgement(Communication_t *Communication_p, const PacketMeta_t *Packet_p, const uint16 *const SessionState_p)
{
ErrorCode_e ReturnValue = E_GENERAL_FATAL_ERROR;
uint32 Key;
if (NULL == Packet_p) {
return E_INVALID_INPUT_PARAMETERS;
}
Key = R15_Network_CreateUniqueKey(Packet_p, 0);
(void)R15_Network_CancelRetransmission(Communication_p, Key);
B_(printf("command_protocol.c (%d): Received Acknowledge!\n", __LINE__);)
ReturnValue = R15_Network_PacketRelease(Communication_p, (PacketMeta_t *)Packet_p);
return ReturnValue;
}
static ErrorCode_e ProcessCommand(Communication_t *Communication_p, PacketMeta_t *Packet_p, uint16 *SessionState_p)
{
ErrorCode_e ReturnValue;
CommandExtendedHeader_t CommandExtendedHeader = {0};
if (NULL == Packet_p) {
return E_INVALID_INPUT_PARAMETERS;
}
R15_DeserializeCommandExtendedHeader(&CommandExtendedHeader, Packet_p->ExtendedHeader_p);
if ((CommandExtendedHeader.SessionState & SESSION_MASK) == (*SessionState_p & SESSION_MASK) + 4) {
*SessionState_p += 4;
} else {
ReturnValue = SendAcknowledge(Communication_p, Packet_p);
if (E_SUCCESS != ReturnValue) {
return ReturnValue;
}
ReturnValue = R15_Network_PacketRelease(Communication_p, Packet_p);
return ReturnValue;
}
return DispatchCommand(Communication_p, Packet_p);
}
static ErrorCode_e ProcessGeneralResponse(Communication_t *Communication_p, PacketMeta_t *Packet_p, uint16 *SessionState_p)
{
ErrorCode_e ReturnValue;
CommandExtendedHeader_t ExtendedHeader = {0};
if (NULL == Packet_p) {
return E_INVALID_INPUT_PARAMETERS;
}
R15_DeserializeCommandExtendedHeader(&ExtendedHeader, Packet_p->ExtendedHeader_p);
if ((ExtendedHeader.SessionState & SESSION_MASK) > (*SessionState_p & SESSION_MASK)) {
ReturnValue = SendAcknowledge(Communication_p, Packet_p);
if (E_SUCCESS != ReturnValue) {
return ReturnValue;
}
ReturnValue = R15_Network_PacketRelease(Communication_p, Packet_p);
return ReturnValue;
}
return DispatchCommand(Communication_p, Packet_p);
}
static ErrorCode_e DispatchCommand(Communication_t *Communication_p, PacketMeta_t *Packet_p)
{
ErrorCode_e ReturnValue;
CommandExtendedHeader_t ExtendedHeader = {0};
CommandData_t CmdData;
ReturnValue = SendAcknowledge(Communication_p, Packet_p);
if (E_SUCCESS != ReturnValue) {
return E_SUCCESS;
}
R15_DeserializeCommandExtendedHeader(&ExtendedHeader, Packet_p->ExtendedHeader_p);
CmdData.Type = (CommandType_t)(ExtendedHeader.SessionState & MASK_SELECT_STATE);
CmdData.CommandNr = ExtendedHeader.Command;
CmdData.ApplicationNr = ExtendedHeader.CommandGroup;
CmdData.SessionNr = ExtendedHeader.SessionState >> 2;
CmdData.Payload.Size = Packet_p->Header.PayloadLength;
CmdData.Payload.Data_p = NULL;
if (0 != CmdData.Payload.Size) {
CmdData.Payload.Data_p = (uint8 *)malloc(Packet_p->Header.PayloadLength);
if (NULL == CmdData.Payload.Data_p) {
return E_ALLOCATE_FAILED;
}
memcpy(CmdData.Payload.Data_p, Packet_p->Payload_p, Packet_p->Header.PayloadLength);
}
ReturnValue = R15_Network_PacketRelease(Communication_p, Packet_p);
ReturnValue = Communication_p->Do_CEH_Call_Fn(OBJECT_CEH_CALL(Communication_p), &CmdData);
if (NULL != CmdData.Payload.Data_p) {
free(CmdData.Payload.Data_p);
CmdData.Payload.Data_p = NULL;
}
return ReturnValue;
}
static ErrorCode_e SendAcknowledge(Communication_t *Communication_p, const PacketMeta_t *const Packet_p)
{
CommandExtendedHeader_t ExtendedHeader;
R15_Header_t Header;
SendData_LP_t Param;
memcpy(&ExtendedHeader, Packet_p->ExtendedHeader_p, COMMAND_EXTENDED_HEADER_LENGTH);
ExtendedHeader.SessionState++;
memcpy(&Header, &Packet_p->Header, HEADER_LENGTH);
Header.Flags = Communication_p->CurrentFamilyHash;
Header.PayloadLength = 0;
Header.PayloadChecksum = 0;
Header.ExtendedHeaderChecksum = 0;
Param.Header_p = &Header;
Param.ExtendedHeader_p = &ExtendedHeader;
Param.Payload_p = NULL;
Param.Time = 0;
Param.TimerCallBackFn_p = NULL;
return R15_Transport_Send(Communication_p, &Param);
}
/** @} */
/** @} */
/** @} */
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