This annex only deals with Internet specific information. For other protocols (XNS and Unix domain protocols), see [11].
The types used in the code are:
char = 8-bit signed integer,u_char = 8-bit unsigned integer,short = 16-bit signed integer,u_short= 16-bit unsigned integer,int = 24-bit signed integer,u_int = 24-bit unsigned integer,long= 32-bit signed integer,u_long = 32-bit unsigned integer,and are defined in <sys/types.h>.