ip.h File Reference

#include "byte.h"
#include "stralloc.h"

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Data Structures
struct	ip4_address
struct	ip6_address

Macros
#define	V4MAPPREFIX   "::ffff:"
#define	HOSTNAMELEN   1025
#define	IP4MLMTU   512
#define	IP6MLMTU   1280 /* RFC 8200 */
#define	MTUSIZE   IP6MLMTU
#define	IP4_FMT   20 /* backwards compatibility */
#define	IP6_FMT   40 /* " */
#define	IPFMT   72 /* used in qmail-remote only (temp?) */
#define	FMT_IP4   IP4_FMT /* more backwards compatibility */
#define	FMT_IP6   IP6_FMT /* " */
#define	ip_address   ip4_address /* backward compatibility */
#define	V6any   V6localnet /* backward compatibility */
#define	ip6_isv4mapped(ip)   (byte_equal(ip,12,V4mappedprefix))

Functions
unsigned int	ip4_bytestring (stralloc *, char[4], int)
	ip4_bytestring parse IPv4 address and represent as char string with length prefix
unsigned int	ip4_cidr (char *, char[4], unsigned long *)
	ip4_cidr parse IPv4 address string concatinated with the prefix length: 192.168.1/24
unsigned int	ip4_fmt (char *, char[4])
	ip4_fmt converts IPv4 address to dotted decimal string format
unsigned int	ip4_scan (const char *, char[4])
	ip4_scan parse IPv4 address string and convert to IP address array
unsigned int	ip4_scanbracket (const char *, char[4])
	ip4_scanbracket parse IPv4 address string enclosed in brackets and convert to IP address array
unsigned int	ia4_fmt (char *, char[4])
	ia4_fmt converts IPv4 address into DNS inverse nibble format
unsigned int	ip6_bytestring (stralloc *, char *, int)
unsigned int	ip6_cidr (char *, char[16], unsigned long *)
	ip6_cidr parse compactified IPv6 address string concatinated with the prefix length: fe80::1/64
unsigned int	ip6_fmt (char *, char[16])
	ip6_fmt convert IPv6 address to compactified IPv6 address string
unsigned int	ip6_fmt_flat (char *, char[16])
	ip6_fmt_flat convert IPv6 address to IPv6 address string
unsigned int	ip6_ifscan (char *, char[16], stralloc *)
	ip6_ifscan parse compactified IPv6 address string concatinated with the interface name: fe80::1eth0
unsigned int	ip6_scan (const char *, char[16])
	ip6_scan parse compactified IPv6 address string and convert to IPv6 address array
unsigned int	ip6_scanbracket (const char *, char[16])
	ip6_scanbracket parse IPv6 string address enclosed in brackets
unsigned int	ip6_scan_flat (const char *, char[16])
	ip6_scan_flat convert IPv6 address string to IPv6 address array
unsigned int	ia6_fmt (char *, char[16])
	ia6_fmt convert IPv6 address to inverse DNS nibble format 1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.ip6.arpa
int	fromhex (unsigned char)
char	tohex (char)

Macro Definition Documentation

FMT_IP4

#define FMT_IP4   IP4_FMT /* more backwards compatibility */

Definition at line 44 of file ip.h.

FMT_IP6

#define FMT_IP6   IP6_FMT /* " */

Definition at line 45 of file ip.h.

HOSTNAMELEN

#define HOSTNAMELEN   1025

Definition at line 32 of file ip.h.

IP4_FMT

#define IP4_FMT   20 /* backwards compatibility */

Definition at line 37 of file ip.h.

IP4MLMTU

#define IP4MLMTU   512

Definition at line 33 of file ip.h.

IP6_FMT

#define IP6_FMT   40 /* " */

Definition at line 38 of file ip.h.

ip6_isv4mapped

#define ip6_isv4mapped

(

ip

)

(byte_equal(ip,12,V4mappedprefix))

Definition at line 105 of file ip.h.

IP6MLMTU

#define IP6MLMTU   1280 /* RFC 8200 */

Definition at line 34 of file ip.h.

ip_address

#define ip_address   ip4_address /* backward compatibility */

Definition at line 50 of file ip.h.

IPFMT

#define IPFMT   72 /* used in qmail-remote only (temp?) */

Definition at line 39 of file ip.h.

MTUSIZE

#define MTUSIZE   IP6MLMTU

Definition at line 35 of file ip.h.

V4MAPPREFIX

#define V4MAPPREFIX   "::ffff:"

Definition at line 31 of file ip.h.

V6any

#define V6any   V6localnet /* backward compatibility */

Definition at line 104 of file ip.h.

Function Documentation

fromhex()

int fromhex

(

unsigned char

c

)

Definition at line 79 of file fmt.c.

ia4_fmt()

unsigned int ia4_fmt	(	char *	s,
		char	ip[4]
	)

ia4_fmt converts IPv4 address into DNS inverse nibble format

Parameters

input

IPv4 char array output: IPv4 address string

Returns

int length of address (ok > 0)

Definition at line 43 of file ip4.c.

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ia6_fmt()

unsigned int ia6_fmt	(	char *	s,
		char	ip[16]
	)

ia6_fmt convert IPv6 address to inverse DNS nibble format 1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.ip6.arpa

Parameters

input

IPv6 char array output: pointer to IPv6 address string

Returns

int length of address

Definition at line 102 of file ip6.c.

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ip4_bytestring()

unsigned int ip4_bytestring	(	stralloc *	ipstring,
		char	ip[4],
		int	prefix
	)

ip4_bytestring parse IPv4 address and represent as char string with length prefix

Parameters

input

IPv4 char array, prefix length output: pointer to stralloc bytestring

Returns

n: number of bytes, if ok; -1: memory shortage; -2: input error

Definition at line 131 of file ip4.c.

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ip4_cidr()

unsigned int ip4_cidr	(	char *	s,
		char	ip[4],
		unsigned long *	plen
	)

ip4_cidr parse IPv4 address string concatinated with the prefix length: 192.168.1/24

Parameters

input

IPv6 char array output: IPv6 char array, long plen

Returns

int length of ip6_address/ip

Definition at line 111 of file ip4.c.

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ip4_fmt()

unsigned int ip4_fmt	(	char *	s,
		char	ip[4]
	)

ip4_fmt converts IPv4 address to dotted decimal string format

Parameters

input

IPv4 char array output: IPv4 address string

Returns

int length of address (ok > 0)

Definition at line 20 of file ip4.c.

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ip4_scan()

unsigned int ip4_scan	(	const char *	s,
		char	ip[4]
	)

ip4_scan parse IPv4 address string and convert to IP address array

Parameters

input

IPv4 address string output: IPv4 char array

Returns

int length of ip_address (ok > 0)

Definition at line 67 of file ip4.c.

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ip4_scanbracket()

unsigned int ip4_scanbracket	(	const char *	s,
		char	ip[4]
	)

ip4_scanbracket parse IPv4 address string enclosed in brackets and convert to IP address array

Parameters

input

IPv4 char array output: IPv4 char array

Returns

int length of ip_address (ok > 0)

Definition at line 92 of file ip4.c.

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ip6_bytestring()

unsigned int ip6_bytestring	(	stralloc *	,
		char *	,
		int
	)

ip6_cidr()

unsigned int ip6_cidr	(	char *	s,
		char	ip[16],
		unsigned long *	plen
	)

ip6_cidr parse compactified IPv6 address string concatinated with the prefix length: fe80::1/64

Parameters

input

pointer to IPv6 address string output: IPv6 char array, long plen

Returns

int length of ip6_address/ip

Definition at line 290 of file ip6.c.

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ip6_fmt()

unsigned int ip6_fmt	(	char *	s,
		char	ip[16]
	)

ip6_fmt convert IPv6 address to compactified IPv6 address string

Parameters

input

IPv6 char array output: pointer to IPv6 address string

Returns

int length of address (ok > 0)

Definition at line 21 of file ip6.c.

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ip6_fmt_flat()

unsigned int ip6_fmt_flat	(	char *	s,
		char	ip[16]
	)

ip6_fmt_flat convert IPv6 address to IPv6 address string

Parameters

input

IPv6 char array output: pointer to IPv6 address string

Returns

int length of address (ok > 0)

Definition at line 84 of file ip6.c.

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ip6_ifscan()

unsigned int ip6_ifscan	(	char *	s,
		char	ip[16],
		stralloc *	ifname
	)

ip6_ifscan parse compactified IPv6 address string concatinated with the interface name: fe80::1eth0

Parameters

input

pointer to IPv6 address string output: IPv6 char array, stralloc interface_name

Returns

int length of ip6_address/ip

Definition at line 262 of file ip6.c.

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ip6_scan()

unsigned int ip6_scan	(	const char *	s,
		char	ip[16]
	)

ip6_scan parse compactified IPv6 address string and convert to IPv6 address array

Parameters

input

pointer to IPv6 address string output: IPv6 char array

Returns

int length of ip6_address/ip

Definition at line 151 of file ip6.c.

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ip6_scan_flat()

unsigned int ip6_scan_flat	(	const char *	s,
		char	ip[16]
	)

ip6_scan_flat convert IPv6 address string to IPv6 address array

Parameters

input

pointer to IPv6 address string output: IPv6 char array

Returns

int length of address (ok > 0)

Definition at line 129 of file ip6.c.

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ip6_scanbracket()

unsigned int ip6_scanbracket	(	const char *	s,
		char	ip[16]
	)

ip6_scanbracket parse IPv6 string address enclosed in brackets

Parameters

input

pointer to IPv6 address string output: IPv6 char array

Returns

int length of ip_address (ok > 0)

Definition at line 243 of file ip6.c.

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tohex()

char tohex

(

char

num

)

Definition at line 70 of file fmt.c.

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