YASKAWA MP3000 Series - Page 368

2.13 Communications with a Windows PC (Visual C++ Application)
Using Automatic Reception with the MP3000 as a Slave
2-350
// Initialize serial number setting
iSerial = 0x00;
// Clear the sockaddr structure (IP address, port number, etc.) with zeros.
memset( (char ∗)&my, 0, sizeof(struct sockaddr));
memset( (char ∗)&dst, 0, sizeof(struct sockaddr));
// Declare the PC’s IP address and port number
my.sin_family = AF_INET;
my.sin_addr.s_addr = myip;
my.sin_port = htons( myport );
// Declare the MP3000’s IP address and port number
dst.sin_family = AF_INET;
dst.sin_addr.s_addr = dstip;
dst.sin_port = htons( dstport );
// Create the TCP or UDP socket
if( trans_prt == TCP_PRT )
{ //TCP
sd = socket( AF_INET, SOCK_STREAM, 0 );
}
else
{ //UDP
sd = socket( AF_INET, SOCK_DGRAM, 0 );
}
if ( sd <= 0 )
{
rc = -1;
return( rc );
}
// Bind the local port number and socket
rc = bind( sd, ( struct sockaddr ∗)&my, sizeof(struct sockaddr_in));
if ( rc == -1 )
{
closesocket( sd );
rc = -2;
return( rc );
}
// Establish connection
if( trans_prt == TCP_PRT )
{ //TCP
rc = connect( sd, ( struct sockaddr ∗)&dst, sizeof(struct sockaddr_in));
if( rc == -1 )
{ //TCP
closesocket( sd );