Hello again, the problem continous, in this moment i have achived accept the
connection, then i have inserted in a select struct the three request socket
.
When the customer send me a request i awake in select, but i can read
anything, the program block in recv. The size of this reception is variable,
in my first connection i ´must receive 10 bytes.
The code:
FD_ZERO(&readset);
maxfd=0;
for(i=1;i<4;i++)
{
FD_SET(aSocket[i], &readset);
if (aSocket[i]> maxfd)
maxfd = aSocket[i];
}
print_dbg(" Metemos los 3 Sockets por donde podemos recibir para
entrar en el select \n");
while(1){
// Check for received packets on configured sockets (blocking )
ret = select(maxfd+1, &readset, NULL, NULL, NULL);
if (ret > 0) //No error
{
//Check data for socket 1
if (FD_ISSET(aSocket[1], &readset))
ProcessRequestPC_to_RTU(aSocket[1]);
//Check data for socket 2
if (FD_ISSET(aSocket[2], &readset))
ProcessRequestPC_to_PCU(aSocket[2]);
//Check data for socket 3
if (FD_ISSET(aSocket[3], &readset))
ProcessRequestPC_Finish(aSocket[3]);
}
}
}
and one fucntion:
void static ProcessRequestPC_to_RTU (int s)
{
int result,nbytesRx;
long code_command,length_command;
nbytesRx=0; //Total=0;
print_dbg(" Recibida peticion RTU por socket: ");
print_dbg_ulong(s);
print_dbg(" \n");
result = recv(s, BufferRx,sizeof(BufferRx), 0); //Block the program and
i saw with wireshark that the message is full with 10 bytes
if (result<=0) //Error or close connection
{
CloseConnectionPC(aSocket,lSocket );
return;
}
nbytesRx+=result; //Byte received
//Calculate the Length. ¡¡¡¡¡ I supposed that 4 byte are received always
TAKE CARE!!!!!!!
memcpy(&length_command, BufferRx, LENGHT_RX);
if (length_command!=nbytesRx)
{
do{
result = recv(s, BufferRx+nbytesRx, length_command-nbytesRx, 0);
if (result<=0) //Error or close connection
{
CloseConnectionPC(aSocket,lSocket );
return;
}
nbytesRx+=result;
} while (nbytesRx<length_command);
}
//All message is received
memcpy(&code_command, BufferRx+LENGHT_RX,L_CODE_RX); //copy the code of
message
switch(code_command)
{
......
More thing, the size of buffer is 2048m but i want to use a buffer of 12000
bytes. If i write this size of buffer crack the application, and don´t
create this task
Thanks
Oscar
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