Originální popis anglicky:
inet_aton, inet_addr, inet_network, inet_ntoa, inet_makeaddr, inet_lnaof,
inet_netof - Internet address manipulation routines
Návod, kniha: Linux Programmer's Manual
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int inet_aton(const char *cp, struct in_addr *inp);
in_addr_t inet_addr(const char *cp);
in_addr_t inet_network(const char *cp);
char *inet_ntoa(struct in_addr in);
struct in_addr inet_makeaddr(int net, int host);
in_addr_t inet_lnaof(struct in_addr in);
in_addr_t inet_netof(struct in_addr in);
inet_aton() converts the Internet host address
cp from the
standard numbers-and-dots notation into binary data and stores it in the
structure that
inp points to.
inet_aton returns nonzero if the
address is valid, zero if not.
The
inet_addr() function converts the Internet host address
cp
from numbers-and-dots notation into binary data in network byte order. If the
input is invalid, 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is obsolete because -1 is a valid address (255.255.255.255), and
inet_aton provides a cleaner way to indicate error return.
The
inet_network() 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.
The
inet_ntoa() 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 in a statically allocated buffer, which subsequent
calls will overwrite.
The
inet_makeaddr() 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.
The
inet_lnaof() function returns the local host address part of the
Internet address
in. The local host address is returned in local host
byte order.
The
inet_netof() function returns the network number part of the Internet
Address
in. The network number is returned in local host byte order.
The structure
in_addr as used in
inet_ntoa(),
inet_makeaddr(),
inet_lnoaf() and
inet_netof() is defined
in
netinet/in.h as:
struct in_addr {
unsigned long int s_addr;
}
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 first.
BSD 4.3
gethostbyname(3),
getnetent(3),
inet_ntop(3),
inet_pton(3),
hosts(5),
networks(5)
