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/*
* - 10 Apr. 2015
* Added support for Arduino Ethernet Shield 2
* by Arduino.org team
*/
#include "utility/w5500.h"
#include "utility/socket.h"
static uint16_t local_port;
/**
* @brief This Socket function initialize the channel in perticular mode, and set the port and wait for w5500 done it.
* @return 1 for success else 0.
*/
uint8_t socket(SOCKET s, uint8_t protocol, uint16_t port, uint8_t flag)
{
if ((protocol == SnMR::TCP) || (protocol == SnMR::UDP) || (protocol == SnMR::IPRAW) || (protocol == SnMR::MACRAW) || (protocol == SnMR::PPPOE))
{
close(s);
w5500.writeSnMR(s, protocol | flag);
if (port != 0) {
w5500.writeSnPORT(s, port);
}
else {
local_port++; // if don't set the source port, set local_port number.
w5500.writeSnPORT(s, local_port);
}
w5500.execCmdSn(s, Sock_OPEN);
return 1;
}
return 0;
}
/**
* @brief This function close the socket and parameter is "s" which represent the socket number
*/
void close(SOCKET s)
{
w5500.execCmdSn(s, Sock_CLOSE);
w5500.writeSnIR(s, 0xFF);
}
/**
* @brief This function established the connection for the channel in passive (server) mode. This function waits for the request from the peer.
* @return 1 for success else 0.
*/
uint8_t listen(SOCKET s)
{
if (w5500.readSnSR(s) != SnSR::INIT)
return 0;
w5500.execCmdSn(s, Sock_LISTEN);
return 1;
}
/**
* @brief This function established the connection for the channel in Active (client) mode.
* This function waits for the untill the connection is established.
*
* @return 1 for success else 0.
*/
uint8_t connect(SOCKET s, uint8_t * addr, uint16_t port)
{
if
(
((addr[0] == 0xFF) && (addr[1] == 0xFF) && (addr[2] == 0xFF) && (addr[3] == 0xFF)) ||
((addr[0] == 0x00) && (addr[1] == 0x00) && (addr[2] == 0x00) && (addr[3] == 0x00)) ||
(port == 0x00)
)
return 0;
// set destination IP
w5500.writeSnDIPR(s, addr);
w5500.writeSnDPORT(s, port);
w5500.execCmdSn(s, Sock_CONNECT);
return 1;
}
/**
* @brief This function used for disconnect the socket and parameter is "s" which represent the socket number
* @return 1 for success else 0.
*/
void disconnect(SOCKET s)
{
w5500.execCmdSn(s, Sock_DISCON);
}
/**
* @brief This function used to send the data in TCP mode
* @return 1 for success else 0.
*/
uint16_t send(SOCKET s, const uint8_t * buf, uint16_t len)
{
uint8_t status=0;
uint16_t ret=0;
uint16_t freesize=0;
if (len > w5500.SSIZE)
ret = w5500.SSIZE; // check size not to exceed MAX size.
else
ret = len;
// if freebuf is available, start.
do
{
freesize = w5500.getTXFreeSize(s);
status = w5500.readSnSR(s);
if ((status != SnSR::ESTABLISHED) && (status != SnSR::CLOSE_WAIT))
{
ret = 0;
break;
}
}
while (freesize < ret);
// copy data
w5500.send_data_processing(s, (uint8_t *)buf, ret);
w5500.execCmdSn(s, Sock_SEND);
/* +2008.01 bj */
while ( (w5500.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK )
{
/* m2008.01 [bj] : reduce code */
if ( w5500.readSnSR(s) == SnSR::CLOSED )
{
close(s);
return 0;
}
}
/* +2008.01 bj */
w5500.writeSnIR(s, SnIR::SEND_OK);
return ret;
}
/**
* @brief This function is an application I/F function which is used to receive the data in TCP mode.
* It continues to wait for data as much as the application wants to receive.
*
* @return received data size for success else -1.
*/
int16_t recv(SOCKET s, uint8_t *buf, int16_t len)
{
// Check how much data is available
int16_t ret = w5500.getRXReceivedSize(s);
if ( ret == 0 )
{
// No data available.
uint8_t status = w5500.readSnSR(s);
if ( status == SnSR::LISTEN || status == SnSR::CLOSED || status == SnSR::CLOSE_WAIT )
{
// The remote end has closed its side of the connection, so this is the eof state
ret = 0;
}
else
{
// The connection is still up, but there's no data waiting to be read
ret = -1;
}
}
else if (ret > len)
{
ret = len;
}
if ( ret > 0 )
{
w5500.recv_data_processing(s, buf, ret);
w5500.execCmdSn(s, Sock_RECV);
}
return ret;
}
/**
* @brief Returns the first byte in the receive queue (no checking)
*
* @return
*/
uint16_t peek(SOCKET s, uint8_t *buf)
{
w5500.recv_data_processing(s, buf, 1, 1);
return 1;
}
/**
* @brief This function is an application I/F function which is used to send the data for other then TCP mode.
* Unlike TCP transmission, The peer's destination address and the port is needed.
*
* @return This function return send data size for success else -1.
*/
uint16_t sendto(SOCKET s, const uint8_t *buf, uint16_t len, uint8_t *addr, uint16_t port)
{
uint16_t ret=0;
if (len > w5500.SSIZE) ret = w5500.SSIZE; // check size not to exceed MAX size.
else ret = len;
if
(
((addr[0] == 0x00) && (addr[1] == 0x00) && (addr[2] == 0x00) && (addr[3] == 0x00)) ||
((port == 0x00)) ||(ret == 0)
)
{
/* +2008.01 [bj] : added return value */
ret = 0;
}
else
{
w5500.writeSnDIPR(s, addr);
w5500.writeSnDPORT(s, port);
// copy data
w5500.send_data_processing(s, (uint8_t *)buf, ret);
w5500.execCmdSn(s, Sock_SEND);
/* +2008.01 bj */
while ( (w5500.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK )
{
if (w5500.readSnIR(s) & SnIR::TIMEOUT)
{
/* +2008.01 [bj]: clear interrupt */
w5500.writeSnIR(s, (SnIR::SEND_OK | SnIR::TIMEOUT)); /* clear SEND_OK & TIMEOUT */
return 0;
}
}
/* +2008.01 bj */
w5500.writeSnIR(s, SnIR::SEND_OK);
}
return ret;
}
/**
* @brief This function is an application I/F function which is used to receive the data in other then
* TCP mode. This function is used to receive UDP, IP_RAW and MAC_RAW mode, and handle the header as well.
*
* @return This function return received data size for success else -1.
*/
uint16_t recvfrom(SOCKET s, uint8_t *buf, uint16_t len, uint8_t *addr, uint16_t *port)
{
uint8_t head[8];
uint16_t data_len=0;
uint16_t ptr=0;
if ( len > 0 )
{
ptr = w5500.readSnRX_RD(s);
switch (w5500.readSnMR(s) & 0x07)
{
case SnMR::UDP :
w5500.read_data(s, ptr, head, 0x08);
ptr += 8;
// read peer's IP address, port number.
addr[0] = head[0];
addr[1] = head[1];
addr[2] = head[2];
addr[3] = head[3];
*port = head[4];
*port = (*port << 8) + head[5];
data_len = head[6];
data_len = (data_len << 8) + head[7];
w5500.read_data(s, ptr, buf, data_len); // data copy.
ptr += data_len;
w5500.writeSnRX_RD(s, ptr);
break;
case SnMR::IPRAW :
w5500.read_data(s, ptr, head, 0x06);
ptr += 6;
addr[0] = head[0];
addr[1] = head[1];
addr[2] = head[2];
addr[3] = head[3];
data_len = head[4];
data_len = (data_len << 8) + head[5];
w5500.read_data(s, ptr, buf, data_len); // data copy.
ptr += data_len;
w5500.writeSnRX_RD(s, ptr);
break;
case SnMR::MACRAW:
w5500.read_data(s, ptr, head, 2);
ptr+=2;
data_len = head[0];
data_len = (data_len<<8) + head[1] - 2;
w5500.read_data(s, ptr, buf, data_len);
ptr += data_len;
w5500.writeSnRX_RD(s, ptr);
break;
default :
break;
}
w5500.execCmdSn(s, Sock_RECV);
}
return data_len;
}
/**
* @brief Wait for buffered transmission to complete.
*/
void flush(SOCKET s) {
// TODO
}
uint16_t igmpsend(SOCKET s, const uint8_t * buf, uint16_t len)
{
//uint8_t status=0;
uint16_t ret=0;
if (len > w5500.SSIZE)
ret = w5500.SSIZE; // check size not to exceed MAX size.
else
ret = len;
if (ret == 0)
return 0;
w5500.send_data_processing(s, (uint8_t *)buf, ret);
w5500.execCmdSn(s, Sock_SEND);
while ( (w5500.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK )
{
//status = w5500.readSnSR(s);
(void)w5500.readSnSR(s);
if (w5500.readSnIR(s) & SnIR::TIMEOUT)
{
/* in case of igmp, if send fails, then socket closed */
/* if you want change, remove this code. */
close(s);
return 0;
}
}
w5500.writeSnIR(s, SnIR::SEND_OK);
return ret;
}
uint16_t bufferData(SOCKET s, uint16_t offset, const uint8_t* buf, uint16_t len)
{
uint16_t ret =0;
if (len > w5500.getTXFreeSize(s))
{
ret = w5500.getTXFreeSize(s); // check size not to exceed MAX size.
}
else
{
ret = len;
}
w5500.send_data_processing_offset(s, offset, buf, ret);
return ret;
}
int startUDP(SOCKET s, uint8_t* addr, uint16_t port)
{
if
(
((addr[0] == 0x00) && (addr[1] == 0x00) && (addr[2] == 0x00) && (addr[3] == 0x00)) ||
((port == 0x00))
)
{
return 0;
}
else
{
w5500.writeSnDIPR(s, addr);
w5500.writeSnDPORT(s, port);
return 1;
}
}
int sendUDP(SOCKET s)
{
w5500.execCmdSn(s, Sock_SEND);
/* +2008.01 bj */
while ( (w5500.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK )
{
if (w5500.readSnIR(s) & SnIR::TIMEOUT)
{
/* +2008.01 [bj]: clear interrupt */
w5500.writeSnIR(s, (SnIR::SEND_OK|SnIR::TIMEOUT));
return 0;
}
}
/* +2008.01 bj */
w5500.writeSnIR(s, SnIR::SEND_OK);
/* Sent ok */
return 1;
}
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