flow-util.h File Reference

#include "detect-engine-state.h"
#include "tmqh-flow.h"

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Macros
#define	COPY_TIMESTAMP(src, dst)   ((dst)->tv_sec = (src)->tv_sec, (dst)->tv_usec = (src)->tv_usec)
#define	RESET_COUNTERS(f)
#define	FLOW_INITIALIZE(f)
#define	FLOW_RECYCLE(f)
	macro to recycle a flow before it goes into the spare queue for reuse. More...
#define	FLOW_DESTROY(f)
#define	FLOW_CHECK_MEMCAP(size)   ((((uint64_t)SC_ATOMIC_GET(flow_memuse) + (uint64_t)(size)) <= SC_ATOMIC_GET(flow_config.memcap)))
	check if a memory alloc would fit in the memcap More...

Functions
Flow *	FlowAlloc (void)
	allocate a flow More...
Flow *	FlowAllocDirect (void)
void	FlowFree (Flow *)
	cleanup & free the memory of a flow More...
uint8_t	FlowGetProtoMapping (uint8_t)
	Function to map the protocol to the defined FLOW_PROTO_* enumeration. More...
void	FlowInit (Flow *, const Packet *)
uint8_t	FlowGetReverseProtoMapping (uint8_t rproto)

Detailed Description

Author

Victor Julien victo.nosp@m.r@in.nosp@m.linia.nosp@m.c.ne.nosp@m.t

Definition in file flow-util.h.

Macro Definition Documentation

COPY_TIMESTAMP

#define COPY_TIMESTAMP	(		src,
			dst
	)		((dst)->tv_sec = (src)->tv_sec, (dst)->tv_usec = (src)->tv_usec)

Definition at line 30 of file flow-util.h.

FLOW_CHECK_MEMCAP

#define FLOW_CHECK_MEMCAP

(

size

)

((((uint64_t)SC_ATOMIC_GET(flow_memuse) + (uint64_t)(size)) <= SC_ATOMIC_GET(flow_config.memcap)))

check if a memory alloc would fit in the memcap

Parameters

size	memory allocation size to check

Return values

1	it fits
0	no fit

Definition at line 137 of file flow-util.h.

FLOW_DESTROY

#define FLOW_DESTROY

(

f

)

Value:

        do { \
        FlowCleanupAppLayer((f)); \
        SC_ATOMIC_DESTROY((f)->flow_state); \
        SC_ATOMIC_DESTROY((f)->use_cnt); \
        \
        FLOWLOCK_DESTROY((f)); \
        GenericVarFree((f)->flowvar); \
    } while(0)

Definition at line 121 of file flow-util.h.

FLOW_INITIALIZE

#define FLOW_INITIALIZE

(

f

)

Definition at line 39 of file flow-util.h.

FLOW_RECYCLE

#define FLOW_RECYCLE

(

f

)

macro to recycle a flow before it goes into the spare queue for reuse.

Note that the lnext, lprev, hnext, hprev fields are untouched, those are managed by the queueing code. Same goes for fb (FlowBucket ptr) field.

Definition at line 84 of file flow-util.h.

RESET_COUNTERS

#define RESET_COUNTERS

(

f

)

Value:

        do { \
        (f)->todstpktcnt = 0; \
        (f)->tosrcpktcnt = 0; \
        (f)->todstbytecnt = 0; \
        (f)->tosrcbytecnt = 0; \
    } while (0)

Definition at line 32 of file flow-util.h.

Function Documentation

FlowAlloc()

Flow* FlowAlloc

(

void

)

allocate a flow

We check against the memuse counter. If it passes that check we increment the counter first, then we try to alloc.

Return values

f	the flow or NULL on out of memory

Definition at line 51 of file flow-util.c.

References FLOW_CHECK_MEMCAP, FLOW_INITIALIZE, FlowStorageSize(), SC_ATOMIC_ADD, SC_ATOMIC_SUB, SCMalloc, and unlikely.

Referenced by FlowGetFromFlowKey(), FlowInitConfig(), FlowUpdateSpareFlows(), and LLVMFuzzerTestOneInput().

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FlowAllocDirect()

Flow* FlowAllocDirect

(

void

)

FlowFree()

void FlowFree

(

Flow *

f

)

cleanup & free the memory of a flow

Parameters

f	flow to clear & destroy

Definition at line 80 of file flow-util.c.

References FLOW_DESTROY, FlowStorageSize(), SC_ATOMIC_SUB, and SCFree.

Referenced by FlowUpdateSpareFlows(), LLVMFuzzerTestOneInput(), and UTHFreeFlow().

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FlowGetProtoMapping()

uint8_t FlowGetProtoMapping

(

uint8_t

proto

)

Function to map the protocol to the defined FLOW_PROTO_* enumeration.

Parameters

proto

protocol which is needed to be mapped

Definition at line 95 of file flow-util.c.

References FLOW_PROTO_DEFAULT, FLOW_PROTO_ICMP, FLOW_PROTO_SCTP, FLOW_PROTO_TCP, FLOW_PROTO_UDP, and proto.

Referenced by AppLayerParserGetEventInfo(), AppLayerParserGetEventInfoById(), AppLayerParserParse(), AppLayerParserProtocolGetLoggerBits(), AppLayerParserProtocolHasLogger(), AppLayerParserProtocolIsTxEventAware(), AppLayerParserProtoIsRegistered(), AppLayerRegisterThreadCounters(), AppLayerSetupCounters(), FlowGetFromFlowKey(), FlowSetProtoFreeFunc(), and LLVMFuzzerTestOneInput().

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FlowGetReverseProtoMapping()

uint8_t FlowGetReverseProtoMapping

(

uint8_t

rproto

)

Definition at line 111 of file flow-util.c.

References FLOW_PROTO_ICMP, FLOW_PROTO_SCTP, FLOW_PROTO_TCP, and FLOW_PROTO_UDP.

Referenced by AppLayerParserThreadCtxAlloc(), and AppLayerParserThreadCtxFree().

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FlowInit()

void FlowInit	(	Flow *	,
		const Packet *
	)

Definition at line 147 of file flow-util.c.

References Flow_::dp, Flow_::dst, Flow_::flags, FLOW_IPV4, FLOW_IPV6, FLOW_SET_IPV4_DST_ADDR_FROM_PACKET, FLOW_SET_IPV4_SRC_ADDR_FROM_PACKET, FLOW_SET_IPV6_DST_ADDR_FROM_PACKET, FLOW_SET_IPV6_SRC_ADDR_FROM_PACKET, Flow_::icmp_s, Packet_::icmp_s, Packet_::icmpv4h, IPV4_GET_IPTTL, IPV6_GET_HLIM, Flow_::livedev, Packet_::livedev, Flow_::max_ttl_toserver, Flow_::min_ttl_toserver, PKT_IS_IPV4, PKT_IS_IPV6, Flow_::proto, Packet_::proto, Flow_::recursion_level, Packet_::recursion_level, SCEnter, SCLogDebug, SET_TCP_DST_PORT, SET_TCP_SRC_PORT, SET_UDP_DST_PORT, SET_UDP_SRC_PORT, Flow_::sp, Flow_::src, Packet_::tcph, Packet_::udph, Flow_::vlan_id, Packet_::vlan_id, Flow_::vlan_idx, and Packet_::vlan_idx.