#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/alq.h>
#include <sys/errno.h>
#include <sys/eventhandler.h>
#include <sys/hash.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/sdt.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/pfil.h>
#include <netinet/in.h>
#include <netinet/in_kdtrace.h>
#include <netinet/in_pcb.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp_var.h>
#include <machine/in_cksum.h>

Include dependency graph for siftr.c:

Data Structures
struct	pkt_node

struct	flow_hash_node

struct	siftr_stats

Macros
#define	V_MAJOR 1

#define	V_BACKBREAK 2

#define	V_BACKCOMPAT 4

#define	MODVERSION __CONCAT(V_MAJOR, __CONCAT(V_BACKBREAK, V_BACKCOMPAT))

#define	MODVERSION_STR

#define	HOOK 0

#define	UNHOOK 1

#define	SIFTR_EXPECTED_MAX_TCP_FLOWS 65536

#define	SYS_NAME "FreeBSD"

#define	PACKET_TAG_SIFTR 100

#define	PACKET_COOKIE_SIFTR 21749576

#define	SIFTR_LOG_FILE_MODE 0644

#define	SIFTR_DISABLE 0

#define	SIFTR_ENABLE 1

#define	MAX_LOG_MSG_LEN 200

#define	SIFTR_ALQ_BUFLEN (1000*MAX_LOG_MSG_LEN)

#define	FLOW_KEY_LEN 13

#define	SIFTR_IPMODE 4

#define	UPPER_SHORT(X) (((X) & 0xFFFF0000) >> 16)

#define	LOWER_SHORT(X) ((X) & 0x0000FFFF)

#define	FIRST_OCTET(X) (((X) & 0xFF000000) >> 24)

#define	SECOND_OCTET(X) (((X) & 0x00FF0000) >> 16)

#define	THIRD_OCTET(X) (((X) & 0x0000FF00) >> 8)

#define	FOURTH_OCTET(X) ((X) & 0x000000FF)

#define	V_siftr_inet_hook VNET(siftr_inet_hook)

Functions
	__FBSDID ("$FreeBSD$")

static	MALLOC_DEFINE (M_SIFTR, "siftr", "dynamic memory used by SIFTR")

static	MALLOC_DEFINE (M_SIFTR_PKTNODE, "siftr_pktnode", "SIFTR pkt_node struct")

static	MALLOC_DEFINE (M_SIFTR_HASHNODE, "siftr_hashnode", "SIFTR flow_hash_node struct")

	DPCPU_DEFINE_STATIC (struct siftr_stats, ss)

	STAILQ_HEAD (pkthead, pkt_node)

static int	siftr_sysctl_enabled_handler (SYSCTL_HANDLER_ARGS)

static int	siftr_sysctl_logfile_name_handler (SYSCTL_HANDLER_ARGS)

	SYSCTL_DECL (_net_inet_siftr)

	SYSCTL_NODE (_net_inet, OID_AUTO, siftr, CTLFLAG_RW\|CTLFLAG_MPSAFE, NULL, "siftr related settings")

	SYSCTL_PROC (_net_inet_siftr, OID_AUTO, enabled, CTLTYPE_UINT\|CTLFLAG_RW\|CTLFLAG_NEEDGIANT, &siftr_enabled, 0, &siftr_sysctl_enabled_handler, "IU", "switch siftr module operations on/off")

	SYSCTL_PROC (_net_inet_siftr, OID_AUTO, logfile, CTLTYPE_STRING\|CTLFLAG_RW\|CTLFLAG_NEEDGIANT, &siftr_logfile_shadow, sizeof(siftr_logfile_shadow), &siftr_sysctl_logfile_name_handler, "A", "file to save siftr log messages to")

	SYSCTL_UINT (_net_inet_siftr, OID_AUTO, ppl, CTLFLAG_RW, &siftr_pkts_per_log, 1, "number of packets between generating a log message")

	SYSCTL_UINT (_net_inet_siftr, OID_AUTO, genhashes, CTLFLAG_RW, &siftr_generate_hashes, 0, "enable packet hash generation")

	SYSCTL_U16 (_net_inet_siftr, OID_AUTO, port_filter, CTLFLAG_RW, &siftr_port_filter, 0, "enable packet filter on a TCP port")

static void	siftr_process_pkt (struct pkt_node *pkt_node)

static void	siftr_pkt_manager_thread (void *arg)

static uint32_t	hash_pkt (struct mbuf *m, uint32_t offset)

static int	siftr_chkreinject (struct mbuf m, int dir, struct siftr_stats ss)

static struct inpcb *	siftr_findinpcb (int ipver, struct ip ip, struct mbuf m, uint16_t sport, uint16_t dport, int dir, struct siftr_stats *ss)

static void	siftr_siftdata (struct pkt_node pn, struct inpcb inp, struct tcpcb *tp, int ipver, int dir, int inp_locally_locked)

static pfil_return_t	siftr_chkpkt (struct mbuf *m, struct ifnet ifp, int flags, void ruleset __unused, struct inpcb inp)

	VNET_DEFINE_STATIC (pfil_hook_t, siftr_inet_hook)

static int	siftr_pfil (int action)

static int	siftr_manage_ops (uint8_t action)

static void	siftr_shutdown_handler (void *arg)

static int	deinit_siftr (void)

static int	init_siftr (void)

static int	siftr_load_handler (module_t mod, int what, void *arg)

	DECLARE_MODULE (siftr, siftr_mod, SI_SUB_LAST, SI_ORDER_ANY)

	MODULE_DEPEND (siftr, alq, 1, 1, 1)

	MODULE_VERSION (siftr, MODVERSION)

Variables
static volatile unsigned int	siftr_exit_pkt_manager_thread = 0

static unsigned int	siftr_enabled = 0

static unsigned int	siftr_pkts_per_log = 1

static unsigned int	siftr_generate_hashes = 0

static uint16_t	siftr_port_filter = 0

static char	siftr_logfile [PATH_MAX] = "/var/log/siftr.log"

static char	siftr_logfile_shadow [PATH_MAX] = "/var/log/siftr.log"

static u_long	siftr_hashmask

static moduledata_t	siftr_mod

Macro Definition Documentation

◆ FIRST_OCTET

#define FIRST_OCTET ( X ) (((X) & 0xFF000000) >> 24)

Definition at line 160 of file siftr.c.

◆ FLOW_KEY_LEN

#define FLOW_KEY_LEN 13

Definition at line 147 of file siftr.c.

◆ FOURTH_OCTET

#define FOURTH_OCTET ( X ) ((X) & 0x000000FF)

Definition at line 163 of file siftr.c.

◆ HOOK

#define HOOK 0

Definition at line 121 of file siftr.c.

◆ LOWER_SHORT

#define LOWER_SHORT ( X ) ((X) & 0x0000FFFF)

Definition at line 158 of file siftr.c.

◆ MAX_LOG_MSG_LEN

#define MAX_LOG_MSG_LEN 200

Definition at line 135 of file siftr.c.

◆ MODVERSION

#define MODVERSION __CONCAT(V_MAJOR, __CONCAT(V_BACKBREAK, V_BACKCOMPAT))

Definition at line 117 of file siftr.c.

◆ MODVERSION_STR

#define MODVERSION_STR

Value:

__XSTRING(V_MAJOR) "." __XSTRING(V_BACKBREAK) "." \

__XSTRING(V_BACKCOMPAT)

V_BACKCOMPAT

#define V_BACKCOMPAT

Definition: siftr.c:116

V_MAJOR

#define V_MAJOR

Definition: siftr.c:114

V_BACKBREAK

#define V_BACKBREAK

Definition: siftr.c:115

Definition at line 118 of file siftr.c.

◆ PACKET_COOKIE_SIFTR

#define PACKET_COOKIE_SIFTR 21749576

Definition at line 126 of file siftr.c.

◆ PACKET_TAG_SIFTR

#define PACKET_TAG_SIFTR 100

Definition at line 125 of file siftr.c.

◆ SECOND_OCTET

#define SECOND_OCTET ( X ) (((X) & 0x00FF0000) >> 16)

Definition at line 161 of file siftr.c.

◆ SIFTR_ALQ_BUFLEN

#define SIFTR_ALQ_BUFLEN (1000*MAX_LOG_MSG_LEN)

Definition at line 137 of file siftr.c.

◆ SIFTR_DISABLE

#define SIFTR_DISABLE 0

Definition at line 128 of file siftr.c.

◆ SIFTR_ENABLE

#define SIFTR_ENABLE 1

Definition at line 129 of file siftr.c.

◆ SIFTR_EXPECTED_MAX_TCP_FLOWS

#define SIFTR_EXPECTED_MAX_TCP_FLOWS 65536

Definition at line 123 of file siftr.c.

◆ SIFTR_IPMODE

#define SIFTR_IPMODE 4

Definition at line 153 of file siftr.c.

◆ SIFTR_LOG_FILE_MODE

#define SIFTR_LOG_FILE_MODE 0644

Definition at line 127 of file siftr.c.

◆ SYS_NAME

#define SYS_NAME "FreeBSD"

Definition at line 124 of file siftr.c.

◆ THIRD_OCTET

#define THIRD_OCTET ( X ) (((X) & 0x0000FF00) >> 8)

Definition at line 162 of file siftr.c.

◆ UNHOOK

#define UNHOOK 1

Definition at line 122 of file siftr.c.

◆ UPPER_SHORT

#define UPPER_SHORT ( X ) (((X) & 0xFFFF0000) >> 16)

Definition at line 157 of file siftr.c.

◆ V_BACKBREAK

#define V_BACKBREAK 2

Definition at line 115 of file siftr.c.

◆ V_BACKCOMPAT

#define V_BACKCOMPAT 4

Definition at line 116 of file siftr.c.

◆ V_MAJOR

#define V_MAJOR 1

Definition at line 114 of file siftr.c.

◆ V_siftr_inet_hook

#define V_siftr_inet_hook VNET(siftr_inet_hook)

Definition at line 1137 of file siftr.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ DECLARE_MODULE()

DECLARE_MODULE	(	siftr	,
		siftr_mod	,
		SI_SUB_LAST	,
		SI_ORDER_ANY
	)

◆ deinit_siftr()

static int deinit_siftr ( void )

static

Definition at line 1510 of file siftr.c.

References SIFTR_DISABLE, siftr_hashmask, and siftr_manage_ops().

Referenced by siftr_load_handler().

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◆ DPCPU_DEFINE_STATIC()

DPCPU_DEFINE_STATIC	(	struct siftr_stats	,
		ss
	)

◆ hash_pkt()

static uint32_t hash_pkt	(	struct mbuf *	m,
		uint32_t	offset
	)

static

Definition at line 639 of file siftr.c.

References pkt_node::hash.

Referenced by siftr_chkpkt().

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◆ init_siftr()

static int init_siftr ( void )

static

Definition at line 1525 of file siftr.c.

References MODVERSION_STR, SIFTR_EXPECTED_MAX_TCP_FLOWS, siftr_hashmask, and siftr_shutdown_handler().

Referenced by siftr_load_handler().

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◆ MALLOC_DEFINE() [1/3]

static MALLOC_DEFINE	(	M_SIFTR	,
		"siftr"	,
		"dynamic memory used by SIFTR"
	)

static

◆ MALLOC_DEFINE() [2/3]

static MALLOC_DEFINE	(	M_SIFTR_HASHNODE	,
		"siftr_hashnode"	,
		"SIFTR flow_hash_node struct"
	)

static

◆ MALLOC_DEFINE() [3/3]

static MALLOC_DEFINE	(	M_SIFTR_PKTNODE	,
		"siftr_pktnode"	,
		"SIFTR pkt_node struct"
	)

static

◆ MODULE_DEPEND()

MODULE_DEPEND	(	siftr	,
		alq	,
		1	,
		1	,
		1
	)

◆ MODULE_VERSION()

MODULE_VERSION	(	siftr	,
		MODVERSION
	)

◆ siftr_chkpkt()

static pfil_return_t siftr_chkpkt	(	struct mbuf **	m,
		struct ifnet *	ifp,
		int	flags,
		void *ruleset	__unused,
		struct inpcb *	inp
	)

static

Definition at line 830 of file siftr.c.

References pkt_node::hash, hash_pkt(), in_cksum_skip(), inpcb::inp_flags, INP_IPV4, INP_LOCK_ASSERT, INP_RUNLOCK, INP_TIMEWAIT, inp_unlock(), intotcpcb, ip_hl, ip::ip_hl, ip::ip_len, ip::ip_p, IPPROTO_TCP, siftr_stats::n_in, siftr_stats::n_out, siftr_stats::nskip_in_malloc, siftr_stats::nskip_in_tcpcb, siftr_stats::nskip_out_malloc, siftr_stats::nskip_out_tcpcb, siftr_chkreinject(), siftr_findinpcb(), siftr_generate_hashes, siftr_port_filter, and siftr_siftdata().

Referenced by siftr_pfil().

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◆ siftr_chkreinject()

static int siftr_chkreinject	(	struct mbuf *	m,
		int	dir,
		struct siftr_stats *	ss
	)

inlinestatic

Definition at line 674 of file siftr.c.

References siftr_stats::nskip_in_dejavu, siftr_stats::nskip_in_malloc, siftr_stats::nskip_out_dejavu, siftr_stats::nskip_out_malloc, PACKET_COOKIE_SIFTR, and PACKET_TAG_SIFTR.

Referenced by siftr_chkpkt().

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◆ siftr_findinpcb()

static struct inpcb * siftr_findinpcb	(	int	ipver,
		struct ip *	ip,
		struct mbuf *	m,
		uint16_t	sport,
		uint16_t	dport,
		int	dir,
		struct siftr_stats *	ss
	)

inlinestatic

Definition at line 707 of file siftr.c.

References in_pcblookup(), INP_INFO_WUNLOCK_ASSERT, INP_IPV4, INPLOOKUP_RLOCKPCB, ip::ip_dst, siftr_stats::nskip_in_inpcb, siftr_stats::nskip_out_inpcb, and V_tcbinfo.

Referenced by siftr_chkpkt().

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◆ siftr_load_handler()

static int siftr_load_handler	(	module_t	mod,
		int	what,
		void *	arg
	)

static

Definition at line 1557 of file siftr.c.

References deinit_siftr(), and init_siftr().

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◆ siftr_manage_ops()

static int siftr_manage_ops ( uint8_t action )

static

Definition at line 1231 of file siftr.c.

Referenced by deinit_siftr(), siftr_shutdown_handler(), and siftr_sysctl_enabled_handler().

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◆ siftr_pfil()

static int siftr_pfil ( int action )

static

Definition at line 1143 of file siftr.c.

References HOOK, siftr_chkpkt(), UNHOOK, V_inet_pfil_head, and V_siftr_inet_hook.

Referenced by siftr_manage_ops().

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◆ siftr_pkt_manager_thread()

static void siftr_pkt_manager_thread ( void * arg )

static

Definition at line 562 of file siftr.c.

References siftr_exit_pkt_manager_thread, siftr_process_pkt(), and STAILQ_HEAD().

Referenced by siftr_manage_ops().

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◆ siftr_process_pkt()

static void siftr_process_pkt ( struct pkt_node * pkt_node )

static

Definition at line 336 of file siftr.c.

References pkt_node::conn_state, flow_hash_node::counter, pkt_node::direction, FIRST_OCTET, pkt_node::flags, FLOW_KEY_LEN, pkt_node::flowid, pkt_node::flowtype, FOURTH_OCTET, pkt_node::hash, INP_IPV6, pkt_node::ip_faddr, pkt_node::ip_laddr, pkt_node::ipver, flow_hash_node::key, LOWER_SHORT, MAX_LOG_MSG_LEN, pkt_node::max_seg_size, siftr_stats::nskip_in_malloc, siftr_stats::nskip_out_malloc, pkt_node::rcv_buf_cc, pkt_node::rcv_buf_hiwater, pkt_node::rcv_scale, pkt_node::rcv_wnd, pkt_node::rxt_length, pkt_node::sack_enabled, SECOND_OCTET, pkt_node::sent_inflight_bytes, siftr_hashmask, siftr_pkts_per_log, pkt_node::smoothed_rtt, pkt_node::snd_buf_cc, pkt_node::snd_buf_hiwater, pkt_node::snd_bwnd, pkt_node::snd_cwnd, pkt_node::snd_scale, pkt_node::snd_ssthresh, pkt_node::snd_wnd, pkt_node::t_segqlen, pkt_node::tcp_foreignport, pkt_node::tcp_localport, THIRD_OCTET, pkt_node::tval, and UPPER_SHORT.

Referenced by siftr_pkt_manager_thread().

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◆ siftr_shutdown_handler()

static void siftr_shutdown_handler ( void * arg )

static

Definition at line 1499 of file siftr.c.

References SIFTR_DISABLE, siftr_enabled, and siftr_manage_ops().

Referenced by init_siftr().

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◆ siftr_siftdata()

static void siftr_siftdata	(	struct pkt_node *	pn,
		struct inpcb *	inp,
		struct tcpcb *	tp,
		int	ipver,
		int	dir,
		int	inp_locally_locked
	)

inlinestatic

Definition at line 757 of file siftr.c.

References pkt_node::conn_state, pkt_node::direction, pkt_node::flags, pkt_node::flowid, pkt_node::flowtype, inpcb::inp_flowid, inpcb::inp_flowtype, INP_IPV4, INP_RUNLOCK, inpcb::inp_socket, pkt_node::ip_faddr, pkt_node::ip_laddr, pkt_node::ipver, pkt_node::max_seg_size, pkt_node::rcv_buf_cc, pkt_node::rcv_buf_hiwater, pkt_node::rcv_scale, tcpcb::rcv_scale, pkt_node::rcv_wnd, tcpcb::rcv_wnd, pkt_node::rxt_length, pkt_node::sack_enabled, pkt_node::sent_inflight_bytes, pkt_node::smoothed_rtt, pkt_node::snd_buf_cc, pkt_node::snd_buf_hiwater, pkt_node::snd_bwnd, pkt_node::snd_cwnd, tcpcb::snd_cwnd, tcpcb::snd_max, pkt_node::snd_scale, tcpcb::snd_scale, pkt_node::snd_ssthresh, tcpcb::snd_ssthresh, tcpcb::snd_una, pkt_node::snd_wnd, tcpcb::snd_wnd, tcpcb::t_flags, tcpcb::t_maxseg, tcpcb::t_rxtcur, pkt_node::t_segqlen, tcpcb::t_segqlen, tcpcb::t_srtt, tcpcb::t_state, pkt_node::tcp_foreignport, pkt_node::tcp_localport, TCP_PROBE1, TF_SACK_PERMIT, and pkt_node::tval.

Referenced by siftr_chkpkt().

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◆ siftr_sysctl_enabled_handler()

static int siftr_sysctl_enabled_handler ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1476 of file siftr.c.

References SIFTR_DISABLE, siftr_enabled, and siftr_manage_ops().

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◆ siftr_sysctl_logfile_name_handler()

static int siftr_sysctl_logfile_name_handler ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1193 of file siftr.c.

References SIFTR_ALQ_BUFLEN, SIFTR_LOG_FILE_MODE, and siftr_logfile.

◆ STAILQ_HEAD()

STAILQ_HEAD	(	pkthead	,
		pkt_node
	)

Definition at line 285 of file siftr.c.

Referenced by siftr_pkt_manager_thread().

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◆ SYSCTL_DECL()

SYSCTL_DECL ( _net_inet_siftr )

◆ SYSCTL_NODE()

SYSCTL_NODE	(	_net_inet	,
		OID_AUTO	,
		siftr	,
		CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		NULL	,
		"siftr related settings"
	)

◆ SYSCTL_PROC() [1/2]

SYSCTL_PROC	(	_net_inet_siftr	,
		OID_AUTO	,
		enabled	,
		CTLTYPE_UINT\|CTLFLAG_RW\|	CTLFLAG_NEEDGIANT,
		&	siftr_enabled,
		0	,
		&	siftr_sysctl_enabled_handler,
		"IU"	,
		"switch siftr module operations on/off"
	)

◆ SYSCTL_PROC() [2/2]

SYSCTL_PROC	(	_net_inet_siftr	,
		OID_AUTO	,
		logfile	,
		CTLTYPE_STRING\|CTLFLAG_RW\|	CTLFLAG_NEEDGIANT,
		&	siftr_logfile_shadow,
		sizeof(siftr_logfile_shadow)	,
		&	siftr_sysctl_logfile_name_handler,
		"A"	,
		"file to save siftr log messages to"
	)

◆ SYSCTL_U16()

SYSCTL_U16	(	_net_inet_siftr	,
		OID_AUTO	,
		port_filter	,
		CTLFLAG_RW	,
		&	siftr_port_filter,
		0	,
		"enable packet filter on a TCP port"
	)

◆ SYSCTL_UINT() [1/2]

SYSCTL_UINT	(	_net_inet_siftr	,
		OID_AUTO	,
		genhashes	,
		CTLFLAG_RW	,
		&	siftr_generate_hashes,
		0	,
		"enable packet hash generation"
	)

◆ SYSCTL_UINT() [2/2]

SYSCTL_UINT	(	_net_inet_siftr	,
		OID_AUTO	,
		ppl	,
		CTLFLAG_RW	,
		&	siftr_pkts_per_log,
		1	,
		"number of packets between generating a log message"
	)

◆ VNET_DEFINE_STATIC()

VNET_DEFINE_STATIC	(	pfil_hook_t	,
		siftr_inet_hook
	)

Variable Documentation

◆ siftr_enabled

unsigned int siftr_enabled = 0

static

Definition at line 277 of file siftr.c.

Referenced by siftr_shutdown_handler(), and siftr_sysctl_enabled_handler().

◆ siftr_exit_pkt_manager_thread

volatile unsigned int siftr_exit_pkt_manager_thread = 0

static

Definition at line 276 of file siftr.c.

Referenced by siftr_manage_ops(), and siftr_pkt_manager_thread().

◆ siftr_generate_hashes

unsigned int siftr_generate_hashes = 0

static

Definition at line 279 of file siftr.c.

Referenced by siftr_chkpkt().

◆ siftr_hashmask

u_long siftr_hashmask

static

Definition at line 284 of file siftr.c.

Referenced by deinit_siftr(), init_siftr(), siftr_manage_ops(), and siftr_process_pkt().

◆ siftr_logfile

char siftr_logfile[PATH_MAX] = "/var/log/siftr.log"

static

Definition at line 282 of file siftr.c.

Referenced by siftr_manage_ops(), and siftr_sysctl_logfile_name_handler().

◆ siftr_logfile_shadow

char siftr_logfile_shadow[PATH_MAX] = "/var/log/siftr.log"

static

Definition at line 283 of file siftr.c.

◆ siftr_mod

moduledata_t siftr_mod

static

Initial value:

= {
        .name = "siftr",
        .evhand = siftr_load_handler,
}

Definition at line 1583 of file siftr.c.

◆ siftr_pkts_per_log

unsigned int siftr_pkts_per_log = 1

static

Definition at line 278 of file siftr.c.

Referenced by siftr_process_pkt().

◆ siftr_port_filter

uint16_t siftr_port_filter = 0

static

Definition at line 280 of file siftr.c.

Referenced by siftr_chkpkt().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ FIRST_OCTET

◆ FLOW_KEY_LEN

◆ FOURTH_OCTET

◆ HOOK

◆ LOWER_SHORT

◆ MAX_LOG_MSG_LEN

◆ MODVERSION

◆ MODVERSION_STR

◆ PACKET_COOKIE_SIFTR

◆ PACKET_TAG_SIFTR

◆ SECOND_OCTET

◆ SIFTR_ALQ_BUFLEN

◆ SIFTR_DISABLE

◆ SIFTR_ENABLE

◆ SIFTR_EXPECTED_MAX_TCP_FLOWS

◆ SIFTR_IPMODE

◆ SIFTR_LOG_FILE_MODE

◆ SYS_NAME

◆ THIRD_OCTET

◆ UNHOOK

◆ UPPER_SHORT

◆ V_BACKBREAK

◆ V_BACKCOMPAT

◆ V_MAJOR

◆ V_siftr_inet_hook

Function Documentation

◆ __FBSDID()

◆ DECLARE_MODULE()

◆ deinit_siftr()

◆ DPCPU_DEFINE_STATIC()

◆ hash_pkt()

◆ init_siftr()

◆ MALLOC_DEFINE() [1/3]

◆ MALLOC_DEFINE() [2/3]

◆ MALLOC_DEFINE() [3/3]

◆ MODULE_DEPEND()

◆ MODULE_VERSION()

◆ siftr_chkpkt()

◆ siftr_chkreinject()

◆ siftr_findinpcb()

◆ siftr_load_handler()

◆ siftr_manage_ops()

◆ siftr_pfil()

◆ siftr_pkt_manager_thread()

◆ siftr_process_pkt()

◆ siftr_shutdown_handler()

◆ siftr_siftdata()

◆ siftr_sysctl_enabled_handler()

◆ siftr_sysctl_logfile_name_handler()

◆ STAILQ_HEAD()

◆ SYSCTL_DECL()

◆ SYSCTL_NODE()

◆ SYSCTL_PROC() [1/2]

◆ SYSCTL_PROC() [2/2]

◆ SYSCTL_U16()

◆ SYSCTL_UINT() [1/2]

◆ SYSCTL_UINT() [2/2]

◆ VNET_DEFINE_STATIC()

Variable Documentation

◆ siftr_enabled

◆ siftr_exit_pkt_manager_thread

◆ siftr_generate_hashes

◆ siftr_hashmask

◆ siftr_logfile

◆ siftr_logfile_shadow

◆ siftr_mod

◆ siftr_pkts_per_log

◆ siftr_port_filter