BSD Sockets Interface Programmer's Guide

Chapter 4 87

Using Internet Datagram Sockets

Overview

Table 4-1 Exchanging Data Between Internet Datagram Sockets

Each of these steps or activities is described in more detail in the

following sections. The description of each activity speciﬁes a system call

and includes:

• What happens when the system call is used.

• When to make the call.

• What the parameters do.

• How the call interacts with other BSD Sockets system calls.

• Where to ﬁnd details on the system call.

The datagram socket program examples are at the end of these

descriptive sections. You can refer to the example code as you work

through the descriptions.

Client

Process

Activity

System

Call Used

Server Process

Activity

System Call

Used

create a socket socket() create a socket socket()

bind a socket

address

bind() bind a socket

address

bind()

send message sendto()

sendmsg()

receive message recvfrom()

or recvmsg()

send message sendto() or

sendmsg()

receive

message

recvfrom()

recvmsg()