Definitions

net_send() return value
#define	NET_SEND_PENDING   (0L) /* net_send() pending, check error code */
#define	NET_SEND_SUCCESS   (1L) /* net_send() success */
#define	NET_SEND_ERROR   (-1L) /* net_send() fatal error */

net_recv() return value
#define	NET_RECV_EVENT   (-1L) /* net_recv() event */

Detailed Description

Macro Definition Documentation

#define NET_SEND_PENDING   (0L) /* net_send() pending, check error code */

net_send() pending, check error code

int32_t net_send_return = 0;
net_send_return = net_send (socket, data, length);

//**************************************************************************
// check success
//**************************************************************************
if ( net_send_return == NET_SEND_PENDING )
{
    //**********************************************************************
    // the data could not be transmitted immediately
    // check error code, mask out MSB (event flag)
    //**********************************************************************
    switch ( socket-> error_code & SO_ERROR_MASK )
    {
    ...
    }  // switch

}

#define NET_SEND_SUCCESS   (1L) /* net_send() success */

net_send() return value for success

int32_t net_send_return = 0;
net_send_return = net_send (socket, data, length);

//**************************************************************************
// check success
//**************************************************************************
if ( net_send_return == NET_SEND_SUCCESS )
{
    // success
}

#define NET_SEND_ERROR   (-1L) /* net_send() fatal error */

net_send() fatal error

int32_t net_send_return = 0;
net_send_return = net_send (socket, data, length);

//**************************************************************************
// check success
//**************************************************************************
if ( net_send_return == NET_SEND_ERROR )
{
    // fatal error, stop connection
    return;
}

#define NET_RECV_EVENT   (-1L) /* net_recv() event */

net_recv() event signal