Changes between Version 20 and Version 21 of ChapterNetworking

ChapterNetworking

v20	v21
47	47	Before we can create a socket, we will need to describe how it will be used and how it will communicate with another socket. Most network programs use maybe one or two types of sockets for the majority of tasks, but flexibility demands that many options be available to the programmer. Therefore, during creation of a socket, we need to specify several socket features that define how we will later communicate through the socket. There are three types of attributes to set:
48	48
49		* ~~the~~ address family
50		* ~~the~~ socket type
51		* ~~the~~ protocol type
	49	* address family
	50	* socket type
	51	* protocol type
52	52
53	53	The address family describes how all communication points or nodes will be addressed or accessed through the new socket. For example, if we create a socket with !AddressFamily.INET, then all communications through the socket are expected to use a 32-bit internet address (eg. 127.0.0.1) and a 16-bit port number. Using !AddressFamily.UNIX means that we expect to communicate through the socket using a local UNIX file path descriptor as an address. Here is a list of address family's provided by the Tango Socket: