/*
*********************************************************************************************************
* CHECK DHCP STATE
*
* Description: This function checks the state of DHCP.
* Arguments : None.
* Returns : None.
* Note :
*********************************************************************************************************
*/
void check_DHCP_state(uint8_t s, wiz_NetInfo *pWIZNETINFO)
{
uint16_t len, i;
uint8_t type, flag;
uint8_t d_addr[4];
type = 0;
if ((len = getSn_RX_RSR(s)) > 0) {
type = parseDHCPMSG(s, len, pWIZNETINFO);
}
switch ( dhcp_state ) {
case STATE_DHCP_DISCOVER :
if (type == DHCP_OFFER) {
jsiConsolePrintf("> Receive DHCP_OFFER\r\n");
for (i = 0; i < 4; i++) d_addr[i] = 0xff;
send_DHCP_REQUEST(s, Cip, d_addr, pWIZNETINFO);
dhcp_state = STATE_DHCP_REQUEST;
} else check_Timeout(s, pWIZNETINFO);
break;
case STATE_DHCP_REQUEST :
if (type == DHCP_ACK) {
jsiConsolePrintf("> Receive DHCP_ACK\r\n");
if (check_leasedIP(s, pWIZNETINFO)) {
//iinchip_init() - WIZnet chip reset & Delay (10ms);
//Set_network();
ctlwizchip(CW_RESET_WIZCHIP, 0);
ctlnetwork(CN_SET_NETINFO, (void*)&(*pWIZNETINFO));
/*
for (i = 0; i < 12; i++) {
//EEP_Write(EEP_LIP+i, *(uint8_t *)((*pWIZNETINFO).ip+i));
}
*/
next_time = jshGetSystemTime() + DHCP_WAIT_TIME;
retry_count = 0;
dhcp_state = STATE_DHCP_LEASED;
} else {
next_time = jshGetSystemTime() + DHCP_WAIT_TIME1;
retry_count = 0;
//dhcp_state = STATE_DHCP_DISCOVER;
dhcp_state = STATE_DHCP_LEASED;
jsiConsolePrintf("> => Recceived IP is invalid\r\n");
//iinchip_init();
//Set_Default();
//Set_network();
//ctlwizchip(CW_RESET_WIZCHIP, 0);
//set_default_netinfo();
//ctlnetwork(CN_SET_NETINFO, (void*)&(*pWIZNETINFO));
}
} else if (type == DHCP_NAK) {
jsiConsolePrintf("> Receive DHCP_NACK\r\n");
next_time = jshGetSystemTime() + DHCP_WAIT_TIME;
retry_count = 0;
dhcp_state = STATE_DHCP_DISCOVER;
} else check_Timeout(s, pWIZNETINFO);
break;
case STATE_DHCP_LEASED :
if ((lease_time.lVal != 0xffffffff) && ((lease_time.lVal/2) < jshGetSystemTime())) {
jsiConsolePrintf("> Renewal IP address \r\n");
type = 0;
for (i = 0; i < 4; i++) OLD_SIP[i] = (*pWIZNETINFO).ip[i];
for (i = 0; i < 4; i++) d_addr[i] = DHCP_SIP[i];
DHCP_XID++;
send_DHCP_REQUEST(s, (*pWIZNETINFO).ip, d_addr, pWIZNETINFO);
dhcp_state = STATE_DHCP_REREQUEST;
next_time = jshGetSystemTime() + DHCP_WAIT_TIME;
}
break;
case STATE_DHCP_REREQUEST :
if (type == DHCP_ACK) {
retry_count = 0;
flag = 0;
for (i = 0; i < 4; i++) {
if (OLD_SIP[i] != (*pWIZNETINFO).ip[i]) {
flag = 1;
break;
}
}
// change to new IP address
if (flag) {
//iinchip_init();
//Set_network();
ctlwizchip(CW_RESET_WIZCHIP, 0);
ctlnetwork(CN_SET_NETINFO, (void*)&(*pWIZNETINFO));
}
next_time = jshGetSystemTime() + DHCP_WAIT_TIME;
dhcp_state = STATE_DHCP_LEASED;
} else if (type == DHCP_NAK) {
next_time = jshGetSystemTime() + DHCP_WAIT_TIME;
retry_count = 0;
dhcp_state = STATE_DHCP_DISCOVER;
// jsiConsolePrintf("state : STATE_DHCP_DISCOVER\r\n");
} else check_Timeout(s, pWIZNETINFO);
break;
case STATE_DHCP_RELEASE :
break;
default :
break;
}
}
/*
*********************************************************************************************************
* CHECK DHCP STATE
*
* Description: This function checks the state of DHCP.
* Arguments : None.
* Returns : None.
* Note :
*********************************************************************************************************
*/
uint8 check_DHCP_state(SOCKET s)
{
uint16 len;
uint8 type;
type = 0;
if(getSn_SR(s)!=SOCK_CLOSED)
{
if ((len = getSn_RX_RSR(s)) > 0)
{
type = parseDHCPMSG(len);
}
}
else
{
if(dhcp_state == STATE_DHCP_READY)
{
//init_dhcp_client();
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_READY\r\n");
#endif
}
if(!socket(SOCK_DHCP,Sn_MR_UDP,DHCP_CLIENT_PORT,0x00))
{
#ifdef DHCP_DEBUG
printf("Fail to create the DHCPC_SOCK(%u)\r\n",SOCK_DHCP);
#endif
return DHCP_RET_ERR;
}
}
switch ( dhcp_state )
{
case STATE_DHCP_READY:
DHCP_timeout = 0;
reset_DHCP_time();
send_DHCP_DISCOVER();
DHCP_timer = 0;//set_timer0(DHCP_timer_handler);
dhcp_state = STATE_DHCP_DISCOVER;
break;
case STATE_DHCP_DISCOVER :
if (type == DHCP_OFFER)
{
reset_DHCP_time();
send_DHCP_REQUEST();
dhcp_state = STATE_DHCP_REQUEST;
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_REQUEST\r\n");
#endif
}
else
check_DHCP_Timeout();
break;
case STATE_DHCP_REQUEST :
if (type == DHCP_ACK)
{
reset_DHCP_time();
if (check_leasedIP())
{
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_LEASED\r\n");
#endif
dhcp_state = STATE_DHCP_LEASED;
return DHCP_RET_UPDATE;
}
else
{
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_DISCOVER\r\n");
#endif
dhcp_state = STATE_DHCP_DISCOVER;
return DHCP_RET_CONFLICT;
}
}
else if (type == DHCP_NAK)
{
reset_DHCP_time();
dhcp_state = STATE_DHCP_DISCOVER;
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_DISCOVER\r\n");
#endif
}
else
check_DHCP_Timeout();
break;
case STATE_DHCP_LEASED :
if ((dhcp_lease_time != 0xffffffff) && (dhcp_time>(dhcp_lease_time/2)))
{
type = 0;
memcpy(OLD_SIP,GET_SIP,4);
DHCP_XID++;
send_DHCP_REQUEST();
dhcp_state = STATE_DHCP_REREQUEST;
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_REREQUEST\r\n");
#endif
reset_DHCP_time();
}
break;
case STATE_DHCP_REREQUEST :
if (type == DHCP_ACK)
{
if(memcmp(OLD_SIP,GET_SIP,4)!=0)
{
#ifdef DHCP_DEBUG
printf("The IP address from the DHCP server is updated.\r\n");
printf("OLD_SIP=%u.%u.%u.%u",OLD_SIP[0],OLD_SIP[1],OLD_SIP[2],OLD_SIP[3]);
printf("GET_SIP=%u.%u.%u.%u\r\n",GET_SIP[0],GET_SIP[1],GET_SIP[2],GET_SIP[3]);
#endif
return DHCP_RET_UPDATE;
}
#ifdef DHCP_DEBUG
else
{
printf("state : STATE_DHCP_LEASED : same IP\r\n");
}
#endif
reset_DHCP_time();
dhcp_state = STATE_DHCP_LEASED;
}
else if (type == DHCP_NAK)
{
reset_DHCP_time();
dhcp_state = STATE_DHCP_DISCOVER;
#ifdef DHCP_DEBUG
printf("state : STATE_DHCP_DISCOVER\r\n");
#endif
}
else
check_DHCP_Timeout();
break;
default :
dhcp_state = STATE_DHCP_READY;
break;
}
if (DHCP_timeout == 1)
{
//kill_timer0(DHCP_timer);
dhcp_state = STATE_DHCP_READY;
return DHCP_RET_TIMEOUT;
}
return DHCP_RET_NONE;
}