in_gif.c File Reference

#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/jail.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/route.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_var.h>
#include <netinet/ip_encap.h>
#include <netinet/ip_ecn.h>
#include <netinet/in_fib.h>
#include <net/if_gif.h>

Include dependency graph for in_gif.c:

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Macros
#define	GIF_TTL   30
#define	V_ip_gif_ttl   VNET(ip_gif_ttl)
#define	V_ipv4_hashtbl   VNET(ipv4_hashtbl)
#define	V_ipv4_srchashtbl   VNET(ipv4_srchashtbl)
#define	V_ipv4_list   VNET(ipv4_list)
#define	GIF_HASH(src, dst)
#define	GIF_SRCHASH(src)
#define	GIF_HASH_SC(sc)

Functions
	__FBSDID ("$FreeBSD$")
	VNET_DEFINE_STATIC (int, ip_gif_ttl)
	SYSCTL_INT (_net_inet_ip, IPCTL_GIF_TTL, gifttl, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(ip_gif_ttl), 0, "Default TTL value for encapsulated packets")
	VNET_DEFINE_STATIC (struct gif_list *, ipv4_hashtbl)
	VNET_DEFINE_STATIC (struct gif_list *, ipv4_srchashtbl)
	VNET_DEFINE_STATIC (struct gif_list, ipv4_list)
static uint32_t	in_gif_hashval (in_addr_t src, in_addr_t dst)
static int	in_gif_checkdup (const struct gif_softc *sc, in_addr_t src, in_addr_t dst)
static void	in_gif_set_running (struct gif_softc *sc)
static void	in_gif_srcaddr (void *arg __unused, const struct sockaddr *sa, int event __unused)
static void	in_gif_attach (struct gif_softc *sc)
int	in_gif_setopts (struct gif_softc *sc, u_int options)
int	in_gif_ioctl (struct gif_softc *sc, u_long cmd, caddr_t data)
int	in_gif_output (struct ifnet *ifp, struct mbuf *m, int proto, uint8_t ecn)
static int	in_gif_input (struct mbuf *m, int off, int proto, void *arg)
static int	in_gif_lookup (const struct mbuf *m, int off, int proto, void **arg)
void	in_gif_init (void)
void	in_gif_uninit (void)

Variables
static const struct srcaddrtab *	ipv4_srcaddrtab
struct {
const struct encap_config   encap
const struct encaptab *   cookie
}	ipv4_encap_cfg []

Macro Definition Documentation

GIF_HASH

#define GIF_HASH	(		src,
			dst
	)

Value:

    (V_ipv4_hashtbl[\
    in_gif_hashval((src), (dst)) & (GIF_HASH_SIZE - 1)])

Definition at line 91 of file in_gif.c.

GIF_HASH_SC

#define GIF_HASH_SC

(

sc

)

Value:

    GIF_HASH((sc)->gif_iphdr->ip_src.s_addr,\
    (sc)->gif_iphdr->ip_dst.s_addr)

Definition at line 95 of file in_gif.c.

GIF_SRCHASH

#define GIF_SRCHASH

(

src

)

Value:

    (V_ipv4_srchashtbl[\
    fnv_32_buf(&(src), sizeof(src), FNV1_32_INIT) & (GIF_HASH_SIZE - 1)])

Definition at line 93 of file in_gif.c.

GIF_TTL

#define GIF_TTL   30

Definition at line 74 of file in_gif.c.

V_ip_gif_ttl

#define V_ip_gif_ttl   VNET(ip_gif_ttl)

Definition at line 76 of file in_gif.c.

V_ipv4_hashtbl

#define V_ipv4_hashtbl   VNET(ipv4_hashtbl)

Definition at line 87 of file in_gif.c.

V_ipv4_list

#define V_ipv4_list   VNET(ipv4_list)

Definition at line 89 of file in_gif.c.

V_ipv4_srchashtbl

#define V_ipv4_srchashtbl   VNET(ipv4_srchashtbl)

Definition at line 88 of file in_gif.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

in_gif_attach()

static void in_gif_attach ( struct gif_softc *  sc )

static

Definition at line 165 of file in_gif.c.

References GIF_HASH_SC, GIF_SRCHASH, and V_ipv4_list.

Referenced by in_gif_ioctl(), and in_gif_setopts().

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in_gif_checkdup()

static int in_gif_checkdup ( const struct gif_softc *  sc, in_addr_t  src, in_addr_t  dst  )

static

Definition at line 107 of file in_gif.c.

References GIF_HASH.

Referenced by in_gif_ioctl().

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in_gif_hashval()

static uint32_t in_gif_hashval ( in_addr_t  src, in_addr_t  dst  )

static

Definition at line 98 of file in_gif.c.

in_gif_init()

void in_gif_init

(

void

)

Definition at line 433 of file in_gif.c.

References cookie, encap, in_gif_srcaddr(), ip_encap_attach(), ip_encap_register_srcaddr(), ipv4_encap_cfg, and ipv4_srcaddrtab.

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in_gif_input()

static int in_gif_input ( struct mbuf *  m, int  off, int  proto, void *  arg  )

static

Definition at line 313 of file in_gif.c.

References ip::ip_tos, and KMOD_IPSTAT_INC.

in_gif_ioctl()

int in_gif_ioctl	(	struct gif_softc *	sc,
		u_long	cmd,
		caddr_t	data
	)

Definition at line 196 of file in_gif.c.

References in_gif_attach(), in_gif_checkdup(), in_gif_set_running(), INADDR_ANY, ip::ip_dst, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_len, V_ipv4_hashtbl, and V_ipv4_srchashtbl.

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in_gif_lookup()

static int in_gif_lookup ( const struct mbuf *  m, int  off, int  proto, void **  arg  )

static

Definition at line 340 of file in_gif.c.

References ENCAP_DRV_LOOKUP, fib4_check_urpf(), GIF_HASH, ip::ip_dst, in_addr::s_addr, V_ipv4_hashtbl, and V_ipv4_list.

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in_gif_output()

int in_gif_output	(	struct ifnet *	ifp,
		struct mbuf *	m,
		int	proto,
		uint8_t	ecn
	)

Definition at line 274 of file in_gif.c.

References ip::ip_len, ip_output(), ip::ip_p, ip::ip_tos, ip::ip_ttl, and V_ip_gif_ttl.

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in_gif_set_running()

static void in_gif_set_running ( struct gif_softc *  sc )

static

Definition at line 130 of file in_gif.c.

References in_localip().

Referenced by in_gif_ioctl(), and in_gif_srcaddr().

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in_gif_setopts()

int in_gif_setopts	(	struct gif_softc *	sc,
		u_int	options
	)

Definition at line 178 of file in_gif.c.

References in_gif_attach().

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in_gif_srcaddr()

static void in_gif_srcaddr ( void *arg  __unused, const struct sockaddr *  sa, int event  __unused  )

static

Definition at line 145 of file in_gif.c.

References GIF_SRCHASH, in_gif_set_running(), in_addr::s_addr, sockaddr_in::sin_addr, and V_ipv4_hashtbl.

Referenced by in_gif_init().

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in_gif_uninit()

void in_gif_uninit

(

void

)

Definition at line 448 of file in_gif.c.

References cookie, ip_encap_detach(), ip_encap_unregister_srcaddr(), ipv4_encap_cfg, ipv4_srcaddrtab, V_ipv4_hashtbl, and V_ipv4_srchashtbl.

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SYSCTL_INT()

SYSCTL_INT	(	_net_inet_ip	,
		IPCTL_GIF_TTL	,
		gifttl	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEip_gif_ttl,
		0	,
		"Default TTL value for encapsulated packets"
	)

VNET_DEFINE_STATIC() [1/4]

VNET_DEFINE_STATIC	(	int	,
		ip_gif_ttl
	)

VNET_DEFINE_STATIC() [2/4]

VNET_DEFINE_STATIC	(	struct gif_list *	,
		ipv4_hashtbl
	)

VNET_DEFINE_STATIC() [3/4]

VNET_DEFINE_STATIC	(	struct gif_list *	,
		ipv4_srchashtbl
	)

VNET_DEFINE_STATIC() [4/4]

VNET_DEFINE_STATIC	(	struct gif_list	,
		ipv4_list
	)

Variable Documentation

cookie

const struct encaptab* cookie

Definition at line 396 of file in_gif.c.

Referenced by encap_detach(), encap_unregister_srcaddr(), in_gif_init(), in_gif_uninit(), process_chunk_drop(), sctp_cookie_timer(), sctp_handle_cookie_echo(), sctp_med_chunk_output(), sctp_process_cookie_existing(), sctp_process_cookie_new(), sctp_send_cookie_echo(), syncookie_generate(), syncookie_lookup(), tcp_fastopen_ccache_create(), tcp_fastopen_check_cookie(), tcp_fastopen_make_psk_cookie(), and tcp_fastopen_update_cache().

encap

const struct encap_config encap

Definition at line 395 of file in_gif.c.

Referenced by in_gif_init().

struct { ... } ipv4_encap_cfg[]

Referenced by in_gif_init(), and in_gif_uninit().

ipv4_srcaddrtab

const struct srcaddrtab* ipv4_srcaddrtab

static

Definition at line 393 of file in_gif.c.

Referenced by in_gif_init(), in_gif_uninit(), and srcaddr_change_event().