BSD Sockets Interface Programmer's Guide

Chapter 2 35
Using Internet Stream Sockets
Writing the Server Process
Writing the Server Process
This section explains the calls your server process must make to connect
with and serve a client process.
Creating a Socket
The server process must call socket to create a communication
endpoint. socket and its parameters are described in the following
table.
Include files: #include <sys/types.h>
#include <sys/socket.h>
System call: s = socket(af, type, protocol)
int af, type, protocol;
Function result: socket number (HP-UX file descriptor), –1 if failure
occurs.
Example:
s = socket (AF_INET, SOCK_STREAM, 0);
The socket number returned is the socket descriptor for the newly
created socket. This number is an HP-UX file descriptor and can be used
for reading, writing or any standard file system calls after a BSD Sockets
connection is established. A socket descriptor is treated like a file
descriptor for an open file.
Parameter Description of Contents INPUT Value
af address family AF_INET
type socket type SOCK_STREAM
protocol underlying protocol to be
used
0 (default) or value
returned by
getprotobyname