#include "suricata-common.h"
#include "detect.h"
#include "decode.h"
#include "flow.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-siggroup.h"
#include "detect-engine-address.h"
#include "detect-engine-proto.h"
#include "detect-engine-port.h"
#include "detect-engine-mpm.h"
#include "detect-engine-build.h"
#include "detect-engine-threshold.h"
#include "detect-engine-iponly.h"
#include "detect-threshold.h"
#include "util-classification-config.h"
#include "util-rule-vars.h"
#include "detect-engine-alert.h"
#include "flow-util.h"
#include "util-debug.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "util-print.h"
#include "util-byte.h"
#include "util-profiling.h"
#include "util-validate.h"
#include "util-cidr.h"
#include <netinet/in.h>

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Data Structures
struct	SigNumArray_
	user data for storing signature id's in the radix tree More...

Typedefs
typedef struct SigNumArray_	SigNumArray
	user data for storing signature id's in the radix tree More...

Functions
void	IPOnlyCIDRListFree (IPOnlyCIDRItem *tmphead)
	This function free a IPOnlyCIDRItem list. More...

int	IPOnlySigParseAddress (const DetectEngineCtx de_ctx, Signature s, const char *addrstr, char flag)
	Parses an address group sent as a character string and updates the IPOnlyCIDRItem lists src and dst of the Signature *s. More...

void	IPOnlyInit (DetectEngineCtx de_ctx, DetectEngineIPOnlyCtx io_ctx)
	Setup the IP Only detection engine context. More...

SigIntId	IPOnlyTrackSigNum (DetectEngineIPOnlyCtx *io_ctx, SigIntId signum)

void	IPOnlyPrint (DetectEngineCtx de_ctx, DetectEngineIPOnlyCtx io_ctx)
	Print stats of the IP Only engine. More...

void	IPOnlyDeinit (DetectEngineCtx de_ctx, DetectEngineIPOnlyCtx io_ctx)
	Deinitialize the IP Only detection engine context. More...

void	IPOnlyMatchPacket (ThreadVars tv, const DetectEngineCtx de_ctx, DetectEngineThreadCtx det_ctx, const DetectEngineIPOnlyCtx io_ctx, Packet *p)
	Match a packet against the IP Only detection engine contexts. More...

void	IPOnlyPrepare (DetectEngineCtx *de_ctx)
	Build the radix trees from the lists of parsed addresses in CIDR format the result should be 4 radix trees: src/dst ipv4 and src/dst ipv6 holding SigNumArrays, each of them with a hierarchical relation of subnets and hosts. More...

void	IPOnlyAddSignature (DetectEngineCtx de_ctx, DetectEngineIPOnlyCtx io_ctx, Signature *s)
	Add a signature to the lists of Addresses in CIDR format (sorted) this step is necessary to build the radix tree with a hierarchical relation between nodes. More...

void	IPOnlyRegisterTests (void)

Detailed Description

Author: Victor Julien victo.nosp@m.r@in.nosp@m.linia.nosp@m.c.ne.nosp@m.t; Pablo Rincon Crespo pablo.nosp@m..rin.nosp@m.con.c.nosp@m.resp.nosp@m.o@gma.nosp@m.il.c.nosp@m.om

Signatures that only inspect IP addresses are processed here We use radix trees for src dst ipv4 and ipv6 addresses This radix trees hold information for subnets and hosts in a hierarchical distribution

Definition in file detect-engine-iponly.c.

Typedef Documentation

◆ SigNumArray

typedef struct SigNumArray_ SigNumArray

user data for storing signature id's in the radix tree

Bit array representing signature internal id's (Signature::num).

Function Documentation

◆ IPOnlyAddSignature()

void IPOnlyAddSignature	(	DetectEngineCtx *	de_ctx,
		DetectEngineIPOnlyCtx *	io_ctx,
		Signature *	s
	)

Add a signature to the lists of Addresses in CIDR format (sorted) this step is necessary to build the radix tree with a hierarchical relation between nodes.

Parameters

de_ctx	Pointer to the current detection engine context
de_ctx	Pointer to the current ip only detection engine contest
s	Pointer to the current signature

ipv4 and ipv6 are mixed, but later we will separate them into different trees

no longer ref to this, it's in the table now

Definition at line 1557 of file detect-engine-iponly.c.

References Signature_::id, IPOnlyTrackSigNum(), Signature_::msg, Signature_::num, SCLogDebug, SIG_TYPE_IPONLY, SigIntId, and Signature_::type.

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◆ IPOnlyCIDRListFree()

void IPOnlyCIDRListFree ( IPOnlyCIDRItem * tmphead )

This function free a IPOnlyCIDRItem list.

Parameters

tmphead Pointer to the list

Definition at line 482 of file detect-engine-iponly.c.

References next, HtpBodyChunk_::next, IPOnlyCIDRItem_::next, SCEnter, SCFree, SCLogDebug, and SCReturn.

Referenced by SigFree().

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◆ IPOnlyDeinit()

void IPOnlyDeinit	(	DetectEngineCtx *	de_ctx,
		DetectEngineIPOnlyCtx *	io_ctx
	)

Deinitialize the IP Only detection engine context.

Parameters

de_ctx	Pointer to the current detection engine
io_ctx	Pointer to the current ip only detection engine

Definition at line 949 of file detect-engine-iponly.c.

References SCFree, SCRadixReleaseRadixTree(), DetectEngineIPOnlyCtx_::sig_mapping, DetectEngineIPOnlyCtx_::tree_ipv4dst, DetectEngineIPOnlyCtx_::tree_ipv4src, DetectEngineIPOnlyCtx_::tree_ipv6dst, and DetectEngineIPOnlyCtx_::tree_ipv6src.

Referenced by SigAddressCleanupStage1().

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◆ IPOnlyInit()

void IPOnlyInit	(	DetectEngineCtx *	de_ctx,
		DetectEngineIPOnlyCtx *	io_ctx
	)

Setup the IP Only detection engine context.

Parameters

de_ctx	Pointer to the current detection engine
io_ctx	Pointer to the current ip only detection engine

Definition at line 910 of file detect-engine-iponly.c.

References SCRadixCreateRadixTree(), and DetectEngineIPOnlyCtx_::tree_ipv4src.

Referenced by SigPrepareStage2().

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◆ IPOnlyMatchPacket()

void IPOnlyMatchPacket	(	ThreadVars *	tv,
		const DetectEngineCtx *	de_ctx,
		DetectEngineThreadCtx *	det_ctx,
		const DetectEngineIPOnlyCtx *	io_ctx,
		Packet *	p
	)

Match a packet against the IP Only detection engine contexts.

Parameters

de_ctx	Pointer to the current detection engine
io_ctx	Pointer to the current ip only detection engine
io_ctx	Pointer to the current ip only thread detection engine
p	Pointer to the Packet to match against

Definition at line 1005 of file detect-engine-iponly.c.

References de_ctx, DETECT_PROTO_IPV4, dst, Packet_::dst, Address_::family, DetectProto_::flags, GET_IPV4_DST_ADDR_U32, GET_IPV4_SRC_ADDR_U32, GET_IPV6_DST_ADDR, GET_IPV6_SRC_ADDR, Signature_::proto, SCEnter, SCLogDebug, SCRadixFindKeyIPV4BestMatch(), SCRadixFindKeyIPV6BestMatch(), SCReturn, DetectEngineCtx_::sig_array, DetectEngineIPOnlyCtx_::sig_mapping, src, Packet_::src, DetectEngineIPOnlyCtx_::tree_ipv4dst, DetectEngineIPOnlyCtx_::tree_ipv4src, DetectEngineIPOnlyCtx_::tree_ipv6dst, and DetectEngineIPOnlyCtx_::tree_ipv6src.

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◆ IPOnlyPrepare()

void IPOnlyPrepare ( DetectEngineCtx * de_ctx )

Build the radix trees from the lists of parsed addresses in CIDR format the result should be 4 radix trees: src/dst ipv4 and src/dst ipv6 holding SigNumArrays, each of them with a hierarchical relation of subnets and hosts.

Parameters

de_ctx Pointer to the current detection engine

Not found, look if there's a subnet of this range with bigger netmask

Not found, insert a new one

Update the sig

Unset it

Set it

Not found, look if there's a subnet of this range with bigger netmask

Definition at line 1134 of file detect-engine-iponly.c.

References SCLogDebug.

◆ IPOnlyPrint()

void IPOnlyPrint	(	DetectEngineCtx *	de_ctx,
		DetectEngineIPOnlyCtx *	io_ctx
	)

Print stats of the IP Only engine.

Parameters

de_ctx	Pointer to the current detection engine
io_ctx	Pointer to the current ip only detection engine

Definition at line 938 of file detect-engine-iponly.c.

◆ IPOnlyRegisterTests()

void IPOnlyRegisterTests ( void )

Definition at line 2497 of file detect-engine-iponly.c.

References UtRegisterTest().

Referenced by SigRegisterTests().

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◆ IPOnlySigParseAddress()

int IPOnlySigParseAddress	(	const DetectEngineCtx *	de_ctx,
		Signature *	s,
		const char *	addrstr,
		char	flag
	)

Parses an address group sent as a character string and updates the IPOnlyCIDRItem lists src and dst of the Signature *s.

Parameters

s	Pointer to the signature structure
addrstr	Pointer to the character string containing the address group that has to be parsed.
flag	to indicate if we are parsing the src string or the dst string

Return values

0	On success.
-1	On failure.

Definition at line 867 of file detect-engine-iponly.c.

References Signature_::flags, SCLogDebug, and SIG_FLAG_SRC_ANY.

◆ IPOnlyTrackSigNum()

SigIntId IPOnlyTrackSigNum	(	DetectEngineIPOnlyCtx *	io_ctx,
		SigIntId	signum
	)

Definition at line 924 of file detect-engine-iponly.c.

References DetectEngineIPOnlyCtx_::sig_mapping, DetectEngineIPOnlyCtx_::sig_mapping_size, and SigIntId.

Referenced by IPOnlyAddSignature().

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Data Structures

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ SigNumArray

Function Documentation

◆ IPOnlyAddSignature()

◆ IPOnlyCIDRListFree()

◆ IPOnlyDeinit()

◆ IPOnlyInit()

◆ IPOnlyMatchPacket()

◆ IPOnlyPrepare()

◆ IPOnlyPrint()

◆ IPOnlyRegisterTests()

◆ IPOnlySigParseAddress()

◆ IPOnlyTrackSigNum()