util-ip.c File Reference

#include "suricata-common.h"
#include "util-ip.h"
#include "util-byte.h"
#include "util-debug.h"

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Functions
bool	IPv4AddressStringIsValid (const char *str)
	determine if a string is a valid ipv4 address More...
bool	IPv6AddressStringIsValid (const char *str)
	determine if a string is a valid ipv6 address More...
struct in_addr *	ValidateIPV4Address (const char *addr_str)
	Validates an IPV4 address and returns the network endian arranged version of the IPV4 address. More...
struct in6_addr *	ValidateIPV6Address (const char *addr_str)
	Validates an IPV6 address and returns the network endian arranged version of the IPV6 address. More...
void	MaskIPNetblock (uint8_t *stream, int netmask, int key_bitlen)
	Culls the non-netmask portion of the IP address. For example an IP address 192.168.240.1 would be chopped to 192.168.224.0 against a netmask value of 19. More...

Detailed Description

Author

Anoop Saldanha anoop.nosp@m.sald.nosp@m.anha@.nosp@m.gmai.nosp@m.l.com

Duarte Silva duart.nosp@m.e.si.nosp@m.lva@s.nosp@m.eria.nosp@m.lizin.nosp@m.g.me

IP addresses related utility functions

Definition in file util-ip.c.

Function Documentation

IPv4AddressStringIsValid()

bool IPv4AddressStringIsValid

(

const char *

str

)

determine if a string is a valid ipv4 address

Return values

bool	is addr valid?

Definition at line 35 of file util-ip.c.

References len, SCLogDebug, str, and StringParseUint8().

Referenced by ValidateIPV4Address().

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IPv6AddressStringIsValid()

bool IPv6AddressStringIsValid

(

const char *

str

)

determine if a string is a valid ipv6 address

Return values

bool	is addr valid?

Definition at line 82 of file util-ip.c.

References len, SCLogDebug, and str.

Referenced by ValidateIPV6Address().

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MaskIPNetblock()

void MaskIPNetblock	(	uint8_t *	stream,
		int	netmask,
		int	key_bitlen
	)

Culls the non-netmask portion of the IP address. For example an IP address 192.168.240.1 would be chopped to 192.168.224.0 against a netmask value of 19.

Parameters

stream	Pointer the IP address that has to be masked
netmask	The netmask value (cidr) to which the IP address has to be culled
key_bitlen	The bitlen of the stream

Definition at line 187 of file util-ip.c.

ValidateIPV4Address()

struct in_addr* ValidateIPV4Address

(

const char *

addr_str

)

Validates an IPV4 address and returns the network endian arranged version of the IPV4 address.

Parameters

addr	Pointer to a character string containing an IPV4 address. A valid IPV4 address is a character string containing a dotted format of "ddd.ddd.ddd.ddd"

Return values

Pointer	to an in_addr instance containing the network endian format of the IPV4 address
NULL	if the IPV4 address is invalid

Definition at line 130 of file util-ip.c.

References FatalError, IPv4AddressStringIsValid(), SCFree, and SCMalloc.

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ValidateIPV6Address()

struct in6_addr* ValidateIPV6Address

(

const char *

addr_str

)

Validates an IPV6 address and returns the network endian arranged version of the IPV6 address.

Parameters

addr	Pointer to a character string containing an IPV6 address

Return values

Pointer	to a in6_addr instance containing the network endian format of the IPV6 address
NULL	if the IPV6 address is invalid

Definition at line 159 of file util-ip.c.

References FatalError, IPv6AddressStringIsValid(), SCFree, and SCMalloc.

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