version 8, including all changes.
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PerryLorier |
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!!NAME |
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inet_aton, inet_addr, inet_network, inet_ntoa, inet_makeaddr, inet_lnaof, inet_netof - Internet address manipulation routines |
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!!SYNOPSIS |
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__#include <sys/socket.h>__ |
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__#include <netinet/in.h>__ |
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__#include <arpa/inet.h>__ |
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__int inet_aton(const char *__''cp''__, struct in_addr *__''inp''__);__ |
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__in_addr_t inet_addr(const char *__''cp''__);__ |
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__in_addr_t inet_network(const char *__''cp''__);__ |
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__char *inet_ntoa(struct in_addr __''in''__);__ |
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__struct in_addr inet_makeaddr(int __''net''__, int __''host''__);__ |
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__in_addr_t inet_lnaof(struct in_addr __''in''__);__ |
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__in_addr_t inet_netof(struct in_addr __''in''__);__ |
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!!DESCRIPTION |
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inet_aton(3) converts the Internet host address ''cp'' from the standard numbers-and-dots notation into binary data and stores it in the structure that ''inp'' |
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points to. inet_aton(3) returns nonzero if the address is valid, zero if not. |
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The inet_addr(3) function converts the Internet host address ''cp'' from numbers-and-dots notation into binary data in network byte order. If the input is invalid, |
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INADDR_NONE (usually -1) is returned. This is an ''obsolete'' interface to __inet_aton__, described immediately above; it is obsolete because -1 is a valid |
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address (255.255.255.255), and inet_aton(3) provides a cleaner way to indicate error return. |
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The inet_network(3) function extracts the network number in host byte order from the address ''cp'' in numbers-and-dots notation. If the input is invalid, -1 is returned. |
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The inet_ntoa(3) function converts the Internet host address ''in'' given in network byte order to a string in standard numbers-and-dots notation. The string is returned |
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in a statically allocated buffer, which subsequent calls will overwrite. |
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MikeBuland |
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** Valgrind reports a memory leak when using this function. No solution has as of yet been found. |
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PerryLorier |
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The inet_makeaddr(3) function makes an Internet host address in network byte order by combining the network number ''net'' with the local address ''host'' in network ''net'', both in local host byte order. |
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The inet_lnaof(3) function returns the local host address part of the Internet address ''in''. The local host address is returned in local host byte order. |
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The inet_netof(3) function returns the network number part of the Internet Address ''in''. The network number is returned in local host byte order. |
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The structure ''in_addr'' as used in inet_ntoa(3), inet_makeaddr(3), inet_lnoaf(3) and inet_netof(3) is defined in ''netinet/in.h'' |
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as: |
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struct in_addr { |
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unsigned long int s_addr; |
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} |
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Note that on the i80x86 the host byte order is Least Significant Byte first, whereas the network byte order, as used on the Internet, is Most Significant Byte |
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first. |
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!!CONFORMING TO |
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BSD 4.3 |
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!!SEE ALSO |
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gethostbyname(3), getnetent(3), inet_ntop(3), inet_pton(3), hosts(5), networks(5) |
