packet.c File Reference

#include "packet.h"
#include "pkt-var.h"
#include "flow.h"
#include "host.h"
#include "util-profiling.h"
#include "util-validate.h"
#include "action-globals.h"

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Macros
#define	CLEAR_ADDR(a)
#define	PACKET_RESET_ACTION(p)   (p)->action = 0
#define	RESET_PKT_LEN(p)   ((p)->pktlen = 0)

Functions
void	PacketDrop (Packet *p, const uint8_t action, enum PacketDropReason r)
	issue drop action More...
bool	PacketCheckAction (const Packet *p, const uint8_t a)
void	PacketInit (Packet *p)
	Initialize a packet structure for use. More...
void	PacketReleaseRefs (Packet *p)
void	PacketReinit (Packet *p)
	Recycle a packet structure for reuse. More...
void	PacketRecycle (Packet *p)
void	PacketDestructor (Packet *p)
	Cleanup a packet so that we can free it. No memset needed.. More...

Macro Definition Documentation

CLEAR_ADDR

#define CLEAR_ADDR

(

a

)

Value:

    do {                                                                                           \
        (a)->family = 0;                                                                           \
        (a)->addr_data32[0] = 0;                                                                   \
        (a)->addr_data32[1] = 0;                                                                   \
        (a)->addr_data32[2] = 0;                                                                   \
        (a)->addr_data32[3] = 0;                                                                   \
    } while (0)

PACKET_RESET_ACTION

#define PACKET_RESET_ACTION

(

p

)

(p)->action = 0

RESET_PKT_LEN

#define RESET_PKT_LEN

(

p

)

((p)->pktlen = 0)

Function Documentation

PacketCheckAction()

bool PacketCheckAction	(	const Packet *	p,
		const uint8_t	a
	)

Definition at line 48 of file packet.c.

References Packet_::action, likely, and Packet_::root.

Referenced by AlertJsonHeader(), CaptureStatsUpdate(), EveAddVerdict(), RejectSendIPv4ICMP(), RejectSendIPv4TCP(), RejectSendIPv6ICMP(), and RejectSendIPv6TCP().

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PacketDestructor()

void PacketDestructor

(

Packet *

p

)

Cleanup a packet so that we can free it. No memset needed..

Definition at line 177 of file packet.c.

References PacketAlerts_::alerts, Packet_::alerts, Packet_::app_layer_events, AppLayerDecoderEventsFreeEvents(), PACKET_FREE_EXTDATA, PACKET_PROFILING_RESET, PacketAlertFree(), PacketReleaseRefs(), Packet_::persistent, Packet_::pktvar, PktVarFree(), SCSpinDestroy, and Packet_::tunnel_lock.

Referenced by PacketFree().

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PacketDrop()

void PacketDrop	(	Packet *	p,
		const uint8_t	action,
		enum PacketDropReason	r
	)

issue drop action

Set drop (+reject) flags in both current and root packet.

Parameters

action

action bit flags. Must be limited to ACTION_DROP_REJECT

Definition at line 32 of file packet.c.

References Packet_::action, ACTION_DROP_REJECT, DEBUG_VALIDATE_BUG_ON, Packet_::drop_reason, PKT_DROP_REASON_INNER_PACKET, PKT_DROP_REASON_NOT_SET, and Packet_::root.

Referenced by ExceptionPolicyParse().

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PacketInit()

void PacketInit

(

Packet *

p

)

Initialize a packet structure for use.

Definition at line 62 of file packet.c.

References PacketAlerts_::alerts, Packet_::alerts, Packet_::livedev, PACKET_RESET_CHECKSUMS, PacketAlertCreate(), Packet_::persistent, SCSpinInit, and Packet_::tunnel_lock.

Referenced by PacketGetFromAlloc().

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PacketRecycle()

void PacketRecycle

(

Packet *

p

)

Definition at line 168 of file packet.c.

References PacketReinit(), and PacketReleaseRefs().

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PacketReinit()

void PacketReinit

(

Packet *

p

)

Recycle a packet structure for reuse.

Definition at line 80 of file packet.c.

References PacketAlert_::action, Packet_::alerts, Packet_::app_layer_events, Packet_::app_update_direction, AppLayerDecoderEventsResetEvents(), Packet_::BypassPacketsFlow, CLEAR_ADDR, CLEAR_ESP_PACKET, CLEAR_ICMPV4_PACKET, CLEAR_ICMPV6_PACKET, CLEAR_IPV4_PACKET, CLEAR_IPV6_PACKET, CLEAR_SCTP_PACKET, CLEAR_TCP_PACKET, CLEAR_UDP_PACKET, PacketAlerts_::cnt, PacketEngineEvents_::cnt, Packet_::datalink, PacketAlerts_::discarded, Packet_::dp, PacketAlerts_::drop, Packet_::drop_reason, Packet_::dst, Packet_::esph, Packet_::ethh, Packet_::events, Packet_::flags, Packet_::flowflags, Packet_::greh, Packet_::icmpv4h, Packet_::icmpv6h, Packet_::ip4h, Packet_::ip6h, Packet_::livedev, Packet_::nb_decoded_layers, Packet_::next, PACKET_FREE_EXTDATA, PACKET_PROFILING_RESET, PACKET_RESET_ACTION, PACKET_RESET_CHECKSUMS, Packet_::payload, Packet_::payload_len, Packet_::pcap_cnt, Packet_::pkt_src, Packet_::pktvar, PktVarFree(), Packet_::ppph, Packet_::pppoedh, Packet_::pppoesh, Packet_::prev, Packet_::proto, Packet_::recursion_level, RESET_PKT_LEN, Packet_::root, SCTIME_INIT, Packet_::sctph, Packet_::sp, Packet_::src, PacketAlerts_::suppressed, Packet_::tcph, Packet_::tenant_id, Packet_::ts, Packet_::tunnel_rtv_cnt, Packet_::tunnel_tpr_cnt, Packet_::udph, Packet_::vlan_id, and Packet_::vlan_idx.

Referenced by PacketRecycle().

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PacketReleaseRefs()

void PacketReleaseRefs

(

Packet *

p

)

Definition at line 70 of file packet.c.

Referenced by PacketDestructor(), PacketRecycle(), and TmqhOutputPacketpool().

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