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inet_network(3) Library Functions Manual inet_network(3) NAME inet_network - Translates an Internet dot-formatted address string to a network address integer LIBRARY Standard C Library (libc.so, libc.a) SYNOPSIS #include <arpa/inet.h> in_addr_t inet_network( const char *string ); STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: inet_network(): XPG4-UNIX Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. PARAMETERS Defines an Internet dot-formatted address as the character string a.b.c.d, where a, b, c and d may be expressed as decimal, octal, or hexadecimal in the C-language idiom. DESCRIPTION The inet_network() function translates a dot-formatted Internet network character address string to a network byte-ordered address (most sig- nificant byte leftmost, least significant byte rightmost). Values specified using dot notation take on one of the following forms: When all four parts are specified, each is interpreted as a byte of data and assigned, from left to right, to the four bytes of an Internet address. When three parts are specified, the last part is interpreted as a 16-bit quantity and placed in the rightmost two bytes of the net- work address. This format is convenient for specifying Class B network addresses as 128.net.host. When two parts are specified, the last part is interpreted as a 24-bit quantity and placed in the rightmost three bytes of the network address. This format is convenient for specifying Class A network addresses as net.host. When only one part is speci- fied, the value is stored directly in the network address without any byte rearrangement. All numbers supplied as parts in dot notation can be decimal, octal, or hexadecimal, as specified in the ISO C standard. A leading 0x or 0X im- plies hexadecimal and a leading 0 implies octal. Otherwise, the number is interpreted as decimal. RETURN VALUES Upon successful completion, the inet_network() function returns an In- ternet byte-ordered address. Otherwise, it returns (in_addr_t)-1. ERRORS Current industry standards for inet_network() do not define error val- ues. RELATED INFORMATION Functions: inet_netof(3), inet_lnaof(3), inet_makeaddr(3), inet_addr(3), inet_ntoa(3) Standards: standards(5) Network Programmer's Guide delim off inet_network(3)