ip4.c File Reference

handling of IPv4 addresses More...

#include "fmt.h"
#include "scan.h"
#include "str.h"
#include "ip.h"

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Functions
unsigned int	ip4_fmt (char *s, char ip[4])
	ip4_fmt converts IPv4 address to dotted decimal string format
unsigned int	ia4_fmt (char *s, char ip[4])
	ia4_fmt converts IPv4 address into DNS inverse nibble format
unsigned int	ip4_scan (const char *s, char ip[4])
	ip4_scan parse IPv4 address string and convert to IP address array
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
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
unsigned int	ip4_bytestring (stralloc *ipstring, char ip[4], int prefix)
	ip4_bytestring parse IPv4 address and represent as char string with length prefix

Detailed Description

handling of IPv4 addresses

Authors

djb, fefe, feh, kp ucspi-tcp, ucspi-tcp6

Definition in file ip4.c.

Function Documentation

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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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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