ne_iaddr_make, ne_iaddr_cmp, ne_iaddr_print, ne_iaddr_typeof, ne_iaddr_parse, ne_iaddr_raw, ne_iaddr_reverse, ne_iaddr_free — functions to manipulate network addresses
#include <ne_socket.h>
typedef enum {
ne_iaddr_ipv4 = 0,
ne_iaddr_ipv6
} ne_iaddr_type;ne_inet_addr *ne_iaddr_make( | ne_iaddr_type type, |
const unsigned char *raw); |
int ne_iaddr_cmp( | const ne_inet_addr *ia1, |
const ne_inet_addr *ia2); |
char *ne_iaddr_print( | const ne_inet_addr *ia, |
| char *buffer, | |
size_t bufsiz); |
ne_iaddr_type ne_iaddr_typeof( | const ne_inet_addr *ia); |
ne_inet_addr *ne_iaddr_parse( | const char *address, |
ne_iaddr_type type); |
unsigned char *ne_iaddr_raw( | const ne_inet_addr *ia, |
unsigned char *buffer); |
int ne_iaddr_reverse( | const ne_inet_addr *ia, |
| char *buffer, | |
size_t buflen); |
void ne_iaddr_free( | const ne_inet_addr *ia); |
ne_iaddr_make creates an
ne_inet_addr object from a raw binary network
address; for instance the four bytes 0x7f 0x00 0x00
0x01 represent the IPv4 address
127.0.0.1. The object returned is suitable for
passing to ne_sock_connect. A binary IPv4
address contains four bytes; a binary IPv6 address contains
sixteen bytes; addresses passed must be in network byte
order.
ne_iaddr_cmp compares two network
address objects; returning zero only if they are identical. The
objects need not have the same address type; if the addresses are
not of the same type, the return value is guaranteed to be
non-zero.
ne_iaddr_print prints a human-readable
string representation of a network address into a buffer, for
instance the string "127.0.0.1".
ne_iaddr_typeof returns the type of the
given network address object.
ne_iaddr_parse parses a string
representation of a network address (such as
"127.0.0.1" and creates a network address
object to represent the parsed address.
ne_iaddr_raw writes the raw byte
representation of a network address to the provided buffer. The
bytes are written in network byte order; the buffer must be of
suitable length for the type of address (4 bytes for an IPv4
address, 16 bytes for an IPv6 address).
ne_iaddr_reverse performs a reverse
name lookup on the address object, writing the (first) hostname
associated with the IP address to the provided buffer. If the
hostname is longer than the buffer it will be silently truncated;
on success the string written to the buffer is always
NUL-terminated.
ne_iaddr_free releases the memory
associated with a network address object.
ne_iaddr_make returns NULL if the
address type passed is not supported (for instance on a platform
which does not support IPv6).
ne_iaddr_print returns the
buffer pointer, and never NULL.
ne_iaddr_parse returns a network
address object on success, or NULL on failure to parse the
address parameter.
ne_iaddr_reverse returns zero on
success or non-zero if no hostname is associated with the
address.
ne_iaddr_raw returns the
buffer parameter, and never NULL.
The following example connects a socket to port 80 at the
address 127.0.0.1.
unsigned char addr[] = "\0x7f\0x00\0x00\0x01";
ne_inet_addr *ia;
ia = ne_iaddr_make(ne_iaddr_ipv4, addr);
if (ia != NULL) {
ne_socket *sock = ne_sock_connect(ia, 80);
ne_iaddr_free(ia);
/* ... */
} else {
/* ... */
}