uint8_t vNet_DataAvailable_M1()
{
/* If there are incoming data, the uip_input() issue a callback that set
the vnetlenght value to the length of the vNet frame, then the value
is returned and the retrieve function provide to get the data from the
buffer */
uint8_t dlen = ETH_FAIL;
if(srvcln_dataavailable(ETH_PORT))
{
dlen = srvcln_dataavailable(ETH_PORT);
}
else if(srvcln_dataavailable(ETH_MODBUS))
{
// Modbus frame are not handled at this stage, but requires a dedicated
// call to Modbus method in the main program
}
else if(srvcln_dataavailable(ETH_HTTP))
{
// HTTP frame are not handled at this stage, but requires a dedicated
// call to HTTP method in the main program
}
else
vNet_uIP(); // Retrieve and process the incoming data
// Return data length, if any
return dlen;
}
void cln_waitsend(uint8_t sock)
{
/* Process the stack until data where sent and no pending
frames are waiting for ack
*/
do
{
vNet_uIP();
delay(uIP_DELAY);
}
while(uip_conns[sock].tcpstateflags != CLOSED);
// Reset
vnetlenght=0;
}
void srv_waitsend(uint8_t sock)
{
/* Process the stack until data where sent and no pending
frames are waiting for ack
*/
do
{
vNet_uIP();
delay(uIP_DELAY);
}
while((uip_outstanding(&uip_conns[sock])) || (uip_conns[sock].appstate & SENDDATA));
// Reset
vnetlenght=0;
}
uint8_t vNet_Send_M1(uint16_t addr, oFrame *frame, uint8_t len)
{
uint8_t sock, ip_addr[4];
uint16_t count = 0, vNet_port;
// Check message length
if ((len == 0) || (len >= UIP_PAYLOADSIZE))
return ETH_FAIL;
// If the frame is not empty, there are waiting data
oFrame_Define(&vNetM1_oFrame);
if(oFrame_isBusy())
return ETH_FAIL;
// Build a frame with len of payload as first byte
vNetM1_header = len+1;
oFrame_Set(&vNetM1_header, 0, 1, 0, frame);
// Define the standard vNet port
vNet_port = ETH_PORT;
// Define the IP address to be used
if((addr == VNET_ADDR_BRDC) || (addr == VNET_ADDR_wBRDC) || (addr == VNET_ADDR_nBRDC) || ((addr > VNET_ADDR_L_M3) && (addr < VNET_ADDR_H_M3)))
{
// Set the IP broadcast address
for(U8 i=0;i<4;i++)
ip_addr[i]=0xFF;
}
else
{
// Verify the User Mode
#if(UMODE_ENABLE)
if ((addr & 0xFF00) != 0x0000)
{
// The first byte is the User Mode Index, if in range 0x01 - 0x64
// a standard client/server connection is used with the user interface
// this give routing and NATting passthrough
if(!UserMode_Get(addr, &ip_addr[0], (uint8_t*)(&vNet_port)))
{
// Flag the error
oFrame_Reset();
return ETH_FAIL;
}
}
else
#endif
eth_vNettoIP(addr, &ip_addr[0]); // Get the IP address
}
// Setup the connection, data will be sent using a callback function
if(!uip_udp_sock((u16_t*)ip_addr, vNet_port, (u16_t)ETH_PORT))
{
// Flag the error
oFrame_Reset();
return ETH_FAIL;
}
// Data are processed with the IP stack
vNet_uIP();
// At this stage data are processed or socket is failed, so we can
// securely reset the oFrame
oFrame_Reset();
return ETH_SUCCESS;
}