Examples: Socket application designs

These examples provide many sample programs that illustrate the more advanced socket concepts. You can use these sample programs to create your own applications that complete a similar task.

• Examples: Connection-oriented designs
  There are a number of ways that you can design a connection-oriented socket server on the iSeries™. These example programs can be used to create your own connection-oriented designs.
• Example: Use asynchronous I/O
  An application creates an I/O completion port using the QsoCreateIOCompletionPort() API.
• Examples: Establish secure connections
  You can create secure server and clients using either the Global Secure ToolKit (GSKit) APIs or the Secure Sockets Layer (SSL_) APIs.
• Example: Use gethostbyaddr_r() for threadsafe network routines
  Here is an example of a program that uses gethostbyaddr_r().
• Example: Nonblocking I/O and select()
  This sample program uses nonblocking and the select() API.
• Use poll() instead of select()
  The poll() API is part of the Single Unix Specification and the UNIX^® 95/98 standard. The poll() API performs the same function as the existing select() API. The only difference between these two APIs is the interface that is provided to the caller.
• Example: Use signals with blocking socket APIs
  Signals allow you to be notified when a process or application becomes blocked.
• Examples: Use multicasting with AF_INET
  IP multicasting provides the capability for an application to send a single IP datagram that a group of hosts in a network can receive.
• Example: Update and query DNS
  This example shows how to query and update Domain Name System (DNS) records.
• Examples: Transfer file data using send_file() and accept_and_recv() APIs
  These examples enable a server to communicate with a client by using the send_file() and accept_and_recv() APIs.