Functions
Inet.h functions

This header provides functions ported from Unix in arpa/inet.h. More...

Functions

int evil_inet_pton (int af, const char *src, void *dst)
 Convert IPv4 and IPv6 addresses from text to binary form. More...
 
const char * evil_inet_ntop (int af, const char *src, void *dst, size_t size)
 Convert IPv4 and IPv6 addresses from binary to text form. More...
 

Detailed Description

This header provides functions ported from Unix in arpa/inet.h.

Function Documentation

§ evil_inet_pton()

int evil_inet_pton ( int  af,
const char *  src,
void *  dst 
)

Convert IPv4 and IPv6 addresses from text to binary form.

Parameters
afThe address family.
srcThe address to convert.
dstThe converted address structure.
Returns
1 on success, 0 or -1 otherwise.

This function converts IPv4 and IPv6 addresses from src to the binary form dst. The following address families to pass to af are currently supported:

  • i AF_INET: src points to a character string containing an IPv4 network address in dotted-decimal format, "ddd.ddd.ddd.ddd", where ddd is a decimal number of up to three digits in the range 0 to
    1. The address is converted to a struct in_addr and copied to dst, which must be sizeof(struct in_addr) (4) bytes (32 bits) long.
  • AF_INET6: src points to a character string containing an IPv6 network address. The address is converted to a struct in6_addr and copied to dst, which must be sizeof(struct in6_addr) (16) bytes (128 bits) long. The allowed formats for IPv6 addresses follow these rules:
    1. The preferred format is x:x:x:x:x:x:x:x. This form consists of eight hexadecimal numbers, each of which expresses a 16-bit value (i.e., each x can be up to 4 hex digits).
    2. A series of contiguous zero values in the preferred format can be abbreviated to ::. Only one instance of :: can occur in an address. For example, the loopback address 0:0:0:0:0:0:0:1 can be abbreviated as ::1. The wildcard address, consisting of all zeros, can be written as ::.
    3. An alternate format is useful for expressing IPv4-mapped IPv6 addresses. This form is written as x:x:x:x:x:x:d.d.d.d, where the six leading xs are hexadecimal values that define the six most-significant 16-bit pieces of the address (i.e., 96 bits), and the ds express a value in dotted-decimal notation that defines the least significant 32 bits of the address. An example of such an address is :: FFFF:204.152.189.116.

On success this function returns 1 (network address was successfully converted). 0 is returned if src does not contain a character string representing a valid network address in the specified address family. If af does not contain a valid address family, -1 is returned and errno is set to EAFNOSUPPORT.

See also
evil_inet_ntop()
inet_ntop()

Conformity: POSIX.1-2001.

Supported OS: Windows XP, CE.

§ evil_inet_ntop()

const char* evil_inet_ntop ( int  af,
const char *  src,
void *  dst,
size_t  size 
)

Convert IPv4 and IPv6 addresses from binary to text form.

Parameters
afThe address family.
srcThe address structure to convert.
dstA buffer containing the converted string.
sizeThe size of the buffer.
Returns
1 on success, 0 otherwise.

This function converts the network address structure src in the af address family into a character string. The resulting string is copied to the buffer pointed to by dst, which must be a non-NULL pointer. The caller specifies the number of bytes available in this buffer in the argument size. The following address families to pass to af are currently supported:

  • AF_INET: src points to a struct in_addr (in network byte order) which is converted to an IPv4 network address in the dotted-decimal format, "ddd.ddd.ddd.ddd". The buffer dst must be at least INET_ADDRSTRLEN bytes long.
  • AF_INET6: src points to a struct in6_addr (in network byte order) which is converted to a representation of this address in the most appropriate IPv6 network address format for this address. The buffer dst must be at least INET6_ADDRSTRLEN bytes long.

On success, this function returns a non-NULL pointer to dst. NULL is returned if there was an error, with errno set to indicate the error.

See also
evil_inet_pton()
inet_pton()

Conformity: POSIX.1-2001.

Supported OS: Windows XP, CE.