Thread: Comment on this socket code

Anyone care to comment on what this socket code does line by line? Thanks. Explain what each line does.

Code:

status = WSAStartup(MAKEWORD(2,0),&Data);

if (status !=0)
  printf ("Error: MAKEWORD\n");


// Create Send Socket >>>>>>>>>>>>>>>>>

memset(&sendSockAddr,0,sizeof(sendSockAddr));
sendSockAddr.sin_port = ACRO_RDS_PORT;
sendSockAddr.sin_family = AF_INET;

sendSocket = socket(AF_INET,SOCK_DGRAM,0);

if (sendSocket == INVALID_SOCKET)
  printf ("RDN Socket() Error\n");

status = bind(sendSocket,(LPSOCKADDR) &sendSockAddr,
		sizeof(sendSockAddr));

if (status == SOCKET_ERROR)
  printf ("ERROR: BIND\n");

size = gethostname(hostname,sizeof(hostname));
printf ("HOST NAME: %s\n",hostname);

phe = gethostbyname(hostname);
printf ("NAME = %s\n",phe->h_name);

memcpy(&sendSockAddr.sin_addr,phe->h_addr_list[0],phe->h_length); 

status = setsockopt(sendSocket,SOL_SOCKET | SO_REUSEADDR,SO_BROADCAST, (char *) &enable,sizeof(enable));

Code tagged by Hammer

>>Anyone care to comment on what this socket code does line by line? Thanks. Explain what each line does.
Not really. Why don't you read the manual pages on each of the functions used in the code.

In essence, it does this:

- Starts Winsock
- Gets and binds to a socket
- Grabs some local host details
- Sets some socket options.

... but I'm sure you knew that already.

Originally posted by Hammer
In essence, it does this:

- Starts Winsock
- Gets and binds to a socket
- Grabs some local host details
- Sets some socket options.

... but I'm sure you knew that already.

You forgot:

Does lousy error checking, that only tells you if there was an error, but continues on with the program's exeuction anyway...

Quzah.

Can anyone tell me something that isn't already obvious?

Thanks.

>>Can anyone tell me something that isn't already obvious?
It's a section of code from a new network based game to be released by M$ next month.

What exactly are you wanting to know? Have you read up about Winsock yet?

Originally posted by mashley
Can anyone tell me something that isn't already obvious?

Thanks.

I could, if I knew what exactly you didn't understand. However, since I don't, I can't. I mean really, what's obvious to me is obviously not obvious to you. Otherwise, you wouldn't be asking for assistance. So, what's obvious to you? What exactly don't you understand?

If you learn one thing at all about programming, it's that you need to be speficic in exactly what you need done. Otherwise you won't know how to do whatever it is you're supposed to do. I mean how could you?



Quzah.