ip.h File Reference

#include "uint32.h"
#include "stralloc.h"

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Data Structures
struct	ip_address
struct	ip6_address

Macros
#define	IPFMT   40
#define	V4MAPPREFIX   "::ffff:"
#define	HOSTNAMELEN   1025

Functions
unsigned int	ip4_fmt (char *, struct ip_address *)
	ip4_fmt converts IPv4 address to dotted decimal string format More...
unsigned int	ip4_scan (struct ip_address *, char *)
	ip4_scan parse IPv4 address string and convert to ip_address More...
unsigned int	ip4_scanbracket (struct ip_address *, char *)
	ip4_scanbracket parse IPv4 address string enclosed in brackets and convert to ip_address struct More...
unsigned int	ip4_bitstring (stralloc *, struct ip_address *, int)
	ip4_bitstring parse IPv4 address and represent as char string with length prefix More...
unsigned int	ip6_fmt (char *, struct ip6_address *)
	ip6_fmt convert IPv6 address to compactified IPv6 address string More...
unsigned int	ip6_scan (struct ip6_address *, char *)
	ip6_scan parse compactified IPv6 address string and convert to ip6_address struct More...
unsigned int	ip6_scanbracket (struct ip6_address *, char *)
	ip6_scanbracket parse IPv6 string address enclosed in brackets More...
unsigned int	ip6_bitstring (stralloc *, struct ip6_address *, int)
	ip6_bitstring parse IPv6 address and represent as char string with length prefix More...

Macro Definition Documentation

HOSTNAMELEN

#define HOSTNAMELEN   1025

Definition at line 9 of file ip.h.

IPFMT

#define IPFMT   40

Definition at line 7 of file ip.h.

V4MAPPREFIX

#define V4MAPPREFIX   "::ffff:"

Definition at line 8 of file ip.h.

Function Documentation

ip4_bitstring()

unsigned int ip4_bitstring	(	stralloc *	ip4string,
		struct ip_address *	ip4,
		int	prefix
	)

ip4_bitstring parse IPv4 address and represent as char string with length prefix

Parameters

input

pointer to struct IPv4 address, prefix length output: pointer to stralloc bitstring

Returns

0, if ok; 1, memory shortage; 2, input error

Definition at line 293 of file ip.c.

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ip4_fmt()

unsigned int ip4_fmt	(	char *	s,
		struct ip_address *	ip
	)

ip4_fmt converts IPv4 address to dotted decimal string format

Parameters

input

pointer to IPv4 ip_address struct output: pointer to IPv4 address string

Returns

int length of address (ok > 0)

Definition at line 23 of file ip.c.

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ip4_scan()

unsigned int ip4_scan	(	struct ip_address *	ip,
		char *	s
	)

ip4_scan parse IPv4 address string and convert to ip_address

Parameters

input

pointer to IPv4 address string output: pointer to IPv4 ip_address struct

Returns

int lenth of ip_address (ok > 0)

Definition at line 47 of file ip.c.

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ip4_scanbracket()

unsigned int ip4_scanbracket	(	struct ip_address *	ip,
		char *	s
	)

ip4_scanbracket parse IPv4 address string enclosed in brackets and convert to ip_address struct

Parameters

input

pointer to IPv4 address string output: pointer to IPv4 ip_address struct

Returns

int lenth of ip_address (ok > 0)

Definition at line 72 of file ip.c.

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ip6_bitstring()

unsigned int ip6_bitstring	(	stralloc *	ip6string,
		struct ip6_address *	ip6,
		int	prefix
	)

ip6_bitstring parse IPv6 address and represent as char string with length prefix

Parameters

input

pointer to struct IPv6 address, prefix length output: pointer to stralloc bit string;

Returns

0, if ok; 1, memory shortage

Definition at line 332 of file ip.c.

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ip6_fmt()

unsigned int ip6_fmt	(	char *	s,
		struct ip6_address *	ip
	)

ip6_fmt convert IPv6 address to compactified IPv6 address string

Compactified IPv6 addresses are really ugly to parse. Syntax: (h = hex digit) [RFC 5952]

1. hhhh:hhhh:hhhh:hhhh:hhhh:hhhh:hhhh:hhhh
2. leading 0s in any octet can be suppressed
3. any number of 0000 may be abbreviated as "::" a) but only once; b) the longest piece or on equal match the first piece, c) a single instance of 0000 as to displayed as 0
4. The last two words may be written as IPv4 address

Flat ip6 address syntax: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh (32 hex digits)

struct ip6_address format: cccccccccccccccc (16 chars; d[16]) – each char swallows two hex values

Bitstring representation with length prefix: bbbbbbb.........bbbb (max 128 bits); stralloc(ip6string); b = 0 || 1

Parameters

input

pointer to IPv6 ip6_address struct output: pointer to IPv6 address string

Returns

int length of address (ok > 0)

Definition at line 91 of file ip.c.

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ip6_scan()

unsigned int ip6_scan	(	struct ip6_address *	ip,
		char *	s
	)

ip6_scan parse compactified IPv6 address string and convert to ip6_address struct

Parameters

input

pointer to IPv6 address string output: pointer to ip6_address struct

Returns

int length of ip6_address/ip

Definition at line 160 of file ip.c.

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ip6_scanbracket()

unsigned int ip6_scanbracket	(	struct ip6_address *	ip6,
		char *	s
	)

ip6_scanbracket parse IPv6 string address enclosed in brackets

Parameters

input

pointer to IPv6 address string output: pointer to IPv6 address struct

Returns

int length of ip_address (ok > 0)

Definition at line 264 of file ip.c.

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