ip_id.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/counter.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/random.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/bitstring.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>

Include dependency graph for ip_id.c:

Go to the source code of this file.

Macros
#define	V_ip_rfc6864   VNET(ip_rfc6864)
#define	V_ip_do_randomid   VNET(ip_do_randomid)
#define	V_id_array   VNET(id_array)
#define	V_id_bits   VNET(id_bits)
#define	V_array_ptr   VNET(array_ptr)
#define	V_array_size   VNET(array_size)
#define	V_random_id_collisions   VNET(random_id_collisions)
#define	V_random_id_total   VNET(random_id_total)
#define	V_ip_id_mtx   VNET(ip_id_mtx)
#define	V_ip_id   VNET(ip_id)

Functions
	__FBSDID ("$FreeBSD$")
	VNET_DEFINE_STATIC (int, ip_rfc6864)
	VNET_DEFINE_STATIC (int, ip_do_randomid)=0
static	MALLOC_DEFINE (M_IPID, "ipid", "randomized ip id state")
	VNET_DEFINE_STATIC (uint16_t *, id_array)
	VNET_DEFINE_STATIC (bitstr_t *, id_bits)
	VNET_DEFINE_STATIC (int, array_ptr)
	VNET_DEFINE_STATIC (int, array_size)
	VNET_DEFINE_STATIC (int, random_id_collisions)
	VNET_DEFINE_STATIC (int, random_id_total)
	VNET_DEFINE_STATIC (struct mtx, ip_id_mtx)
	VNET_DEFINE_STATIC (counter_u64_t, ip_id)
static int	sysctl_ip_randomid (SYSCTL_HANDLER_ARGS)
static int	sysctl_ip_id_change (SYSCTL_HANDLER_ARGS)
static void	ip_initid (int)
static uint16_t	ip_randomid (void)
static void	ipid_sysinit (void)
static void	ipid_sysuninit (void)
	SYSCTL_DECL (_net_inet_ip)
	SYSCTL_PROC (_net_inet_ip, OID_AUTO, random_id, CTLTYPE_INT|CTLFLAG_VNET|CTLFLAG_RW|CTLFLAG_MPSAFE, &VNET_NAME(ip_do_randomid), 0, sysctl_ip_randomid, "IU", "Assign random ip_id values")
	SYSCTL_INT (_net_inet_ip, OID_AUTO, rfc6864, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(ip_rfc6864), 0, "Use constant IP ID for atomic datagrams")
	SYSCTL_PROC (_net_inet_ip, OID_AUTO, random_id_period, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_VNET|CTLFLAG_MPSAFE, &VNET_NAME(array_size), 0, sysctl_ip_id_change, "IU", "IP ID Array size")
	SYSCTL_INT (_net_inet_ip, OID_AUTO, random_id_collisions, CTLFLAG_RD|CTLFLAG_VNET, &VNET_NAME(random_id_collisions), 0, "Count of IP ID collisions")
	SYSCTL_INT (_net_inet_ip, OID_AUTO, random_id_total, CTLFLAG_RD|CTLFLAG_VNET, &VNET_NAME(random_id_total), 0, "Count of IP IDs created")
void	ip_fillid (struct ip *ip)
	VNET_SYSINIT (ip_id, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, ipid_sysinit, NULL)
	VNET_SYSUNINIT (ip_id, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ipid_sysuninit, NULL)

Macro Definition Documentation

V_array_ptr

#define V_array_ptr   VNET(array_ptr)

Definition at line 119 of file ip_id.c.

V_array_size

#define V_array_size   VNET(array_size)

Definition at line 120 of file ip_id.c.

V_id_array

#define V_id_array   VNET(id_array)

Definition at line 117 of file ip_id.c.

V_id_bits

#define V_id_bits   VNET(id_bits)

Definition at line 118 of file ip_id.c.

V_ip_do_randomid

#define V_ip_do_randomid   VNET(ip_do_randomid)

Definition at line 104 of file ip_id.c.

V_ip_id

#define V_ip_id   VNET(ip_id)

Definition at line 129 of file ip_id.c.

V_ip_id_mtx

#define V_ip_id_mtx   VNET(ip_id_mtx)

Definition at line 123 of file ip_id.c.

V_ip_rfc6864

#define V_ip_rfc6864   VNET(ip_rfc6864)

Definition at line 103 of file ip_id.c.

V_random_id_collisions

#define V_random_id_collisions   VNET(random_id_collisions)

Definition at line 121 of file ip_id.c.

V_random_id_total

#define V_random_id_total   VNET(random_id_total)

Definition at line 122 of file ip_id.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

ip_fillid()

void ip_fillid

(

struct ip *

ip

)

Definition at line 243 of file ip_id.c.

References IP_DF, ip::ip_id, ip::ip_off, ip_randomid(), V_ip_do_randomid, V_ip_id, and V_ip_rfc6864.

Referenced by carp_send_ad_locked(), in_gre_output(), ip_output(), pim_register_send_rp(), sctp_lowlevel_chunk_output(), and sctp_send_resp_msg().

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ip_initid()

static void ip_initid ( int  new_size )

static

Definition at line 192 of file ip_id.c.

References V_array_ptr, V_array_size, V_id_array, V_id_bits, V_ip_id_mtx, V_random_id_collisions, and V_random_id_total.

Referenced by sysctl_ip_id_change(), and sysctl_ip_randomid().

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ip_randomid()

static uint16_t ip_randomid ( void  )

static

Definition at line 216 of file ip_id.c.

References V_array_ptr, V_array_size, V_id_array, V_id_bits, V_ip_id_mtx, V_random_id_collisions, and V_random_id_total.

Referenced by ip_fillid().

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ipid_sysinit()

static void ipid_sysinit ( void  )

static

Definition at line 277 of file ip_id.c.

References V_ip_id, and V_ip_id_mtx.

ipid_sysuninit()

static void ipid_sysuninit ( void  )

static

Definition at line 290 of file ip_id.c.

References V_id_array, V_id_bits, V_ip_id, and V_ip_id_mtx.

MALLOC_DEFINE()

static MALLOC_DEFINE ( M_IPID  , "ipid"  , "randomized ip id state"    )

static

SYSCTL_DECL()

SYSCTL_DECL

(

_net_inet_ip

)

SYSCTL_INT() [1/3]

SYSCTL_INT	(	_net_inet_ip	,
		OID_AUTO	,
		random_id_collisions	,
		CTLFLAG_RD|	CTLFLAG_VNET,
		&	VNET_NAMErandom_id_collisions,
		0	,
		"Count of IP ID collisions"
	)

SYSCTL_INT() [2/3]

SYSCTL_INT	(	_net_inet_ip	,
		OID_AUTO	,
		random_id_total	,
		CTLFLAG_RD|	CTLFLAG_VNET,
		&	VNET_NAMErandom_id_total,
		0	,
		"Count of IP IDs created"
	)

SYSCTL_INT() [3/3]

SYSCTL_INT	(	_net_inet_ip	,
		OID_AUTO	,
		rfc6864	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEip_rfc6864,
		0	,
		"Use constant IP ID for atomic datagrams"
	)

sysctl_ip_id_change()

static int sysctl_ip_id_change ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 176 of file ip_id.c.

References ip_initid(), and V_array_size.

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sysctl_ip_randomid()

static int sysctl_ip_randomid ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 156 of file ip_id.c.

References ip_initid(), and V_ip_do_randomid.

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SYSCTL_PROC() [1/2]

SYSCTL_PROC	(	_net_inet_ip	,
		OID_AUTO	,
		random_id	,
		CTLTYPE_INT|CTLFLAG_VNET|CTLFLAG_RW|	CTLFLAG_MPSAFE,
		&	VNET_NAMEip_do_randomid,
		0	,
		sysctl_ip_randomid	,
		"IU"	,
		"Assign random ip_id values"
	)

SYSCTL_PROC() [2/2]

SYSCTL_PROC	(	_net_inet_ip	,
		OID_AUTO	,
		random_id_period	,
		CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_VNET|	CTLFLAG_MPSAFE,
		&	VNET_NAMEarray_size,
		0	,
		sysctl_ip_id_change	,
		"IU"	,
		"IP ID Array size"
	)

VNET_DEFINE_STATIC() [1/10]

VNET_DEFINE_STATIC	(	bitstr_t *	,
		id_bits
	)

VNET_DEFINE_STATIC() [2/10]

VNET_DEFINE_STATIC	(	counter_u64_t	,
		ip_id
	)

VNET_DEFINE_STATIC() [3/10]

VNET_DEFINE_STATIC	(	int	,
		array_ptr
	)

VNET_DEFINE_STATIC() [4/10]

VNET_DEFINE_STATIC	(	int	,
		array_size
	)

VNET_DEFINE_STATIC() [5/10]

VNET_DEFINE_STATIC ( int  , ip_do_randomid    )

pure virtual

VNET_DEFINE_STATIC() [6/10]

VNET_DEFINE_STATIC	(	int	,
		ip_rfc6864
	)

VNET_DEFINE_STATIC() [7/10]

VNET_DEFINE_STATIC	(	int	,
		random_id_collisions
	)

VNET_DEFINE_STATIC() [8/10]

VNET_DEFINE_STATIC	(	int	,
		random_id_total
	)

VNET_DEFINE_STATIC() [9/10]

VNET_DEFINE_STATIC	(	struct mtx	,
		ip_id_mtx
	)

VNET_DEFINE_STATIC() [10/10]

VNET_DEFINE_STATIC	(	uint16_t *	,
		id_array
	)

VNET_SYSINIT()

VNET_SYSINIT	(	ip_id	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_ANY	,
		ipid_sysinit	,
		NULL
	)

VNET_SYSUNINIT()

VNET_SYSUNINIT	(	ip_id	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_THIRD	,
		ipid_sysuninit	,
		NULL
	)