#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/jail.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.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/if.h>
#include <net/if_var.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/ip_encap.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <net/if_gre.h>
#include <machine/in_cksum.h>

Include dependency graph for ip_gre.c:

Data Structures
struct	in_gre_socket

Macros
#define	GRE_TTL 30

#define	V_ip_gre_ttl VNET(ip_gre_ttl)

#define	V_ipv4_sockets VNET(ipv4_sockets)

#define	V_ipv4_hashtbl VNET(ipv4_hashtbl)

#define	V_ipv4_srchashtbl VNET(ipv4_srchashtbl)

#define	GRE_HASH(src, dst)

#define	GRE_SRCHASH(src)

#define	GRE_SOCKHASH(src)

#define	GRE_HASH_SC(sc)

Functions
	__FBSDID ("$FreeBSD$")

	VNET_DEFINE (int, ip_gre_ttl)

	SYSCTL_INT (_net_inet_ip, OID_AUTO, grettl, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(ip_gre_ttl), 0, "Default TTL value for encapsulated packets")

	VNET_DEFINE_STATIC (struct gre_sockets *, ipv4_sockets)

	VNET_DEFINE_STATIC (struct gre_list *, ipv4_hashtbl)

	VNET_DEFINE_STATIC (struct gre_list *, ipv4_srchashtbl)

static uint32_t	in_gre_hashval (in_addr_t src, in_addr_t dst)

static struct gre_socket *	in_gre_lookup_socket (in_addr_t addr)

static int	in_gre_checkdup (const struct gre_softc *sc, in_addr_t src, in_addr_t dst, uint32_t opts)

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

static void	in_gre_set_running (struct gre_softc *sc)

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

static void	in_gre_udp_input (struct mbuf m, int off, struct inpcb inp, const struct sockaddr sa, void ctx)

static int	in_gre_setup_socket (struct gre_softc *sc)

static int	in_gre_attach (struct gre_softc *sc)

int	in_gre_setopts (struct gre_softc *sc, u_long cmd, uint32_t value)

int	in_gre_ioctl (struct gre_softc *sc, u_long cmd, caddr_t data)

int	in_gre_output (struct mbuf *m, int af, int hlen)

void	in_gre_init (void)

void	in_gre_uninit (void)

Variables
static const struct srcaddrtab *	ipv4_srcaddrtab = NULL

static const struct encaptab *	ecookie = NULL

static const struct encap_config	ipv4_encap_cfg

Macro Definition Documentation

◆ GRE_HASH

#define GRE_HASH	(	src,
		dst
	)

Value:

(V_ipv4_hashtbl[\

in_gre_hashval((src), (dst)) & (GRE_HASH_SIZE - 1)])

V_ipv4_hashtbl

#define V_ipv4_hashtbl

Definition: ip_gre.c:90

Definition at line 92 of file ip_gre.c.

◆ GRE_HASH_SC

#define GRE_HASH_SC ( sc )

Value:

GRE_HASH((sc)->gre_oip.ip_src.s_addr,\

(sc)->gre_oip.ip_dst.s_addr)

GRE_HASH

#define GRE_HASH(src, dst)

Definition: ip_gre.c:92

Definition at line 98 of file ip_gre.c.

◆ GRE_SOCKHASH

#define GRE_SOCKHASH ( src )

Value:

(V_ipv4_sockets[\

fnv_32_buf(&(src), sizeof(src), FNV1_32_INIT) & (GRE_HASH_SIZE - 1)])

V_ipv4_sockets

#define V_ipv4_sockets

Definition: ip_gre.c:89

Definition at line 96 of file ip_gre.c.

◆ GRE_SRCHASH

#define GRE_SRCHASH ( src )

Value:

(V_ipv4_srchashtbl[\

fnv_32_buf(&(src), sizeof(src), FNV1_32_INIT) & (GRE_HASH_SIZE - 1)])

V_ipv4_srchashtbl

#define V_ipv4_srchashtbl

Definition: ip_gre.c:91

Definition at line 94 of file ip_gre.c.

◆ GRE_TTL

#define GRE_TTL 30

Definition at line 76 of file ip_gre.c.

◆ V_ip_gre_ttl

#define V_ip_gre_ttl VNET(ip_gre_ttl)

Definition at line 78 of file ip_gre.c.

◆ V_ipv4_hashtbl

#define V_ipv4_hashtbl VNET(ipv4_hashtbl)

Definition at line 90 of file ip_gre.c.

◆ V_ipv4_sockets

#define V_ipv4_sockets VNET(ipv4_sockets)

Definition at line 89 of file ip_gre.c.

◆ V_ipv4_srchashtbl

#define V_ipv4_srchashtbl VNET(ipv4_srchashtbl)

Definition at line 91 of file ip_gre.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ in_gre_attach()

static int in_gre_attach ( struct gre_softc * sc )

static

Definition at line 348 of file ip_gre.c.

References GRE_HASH_SC, GRE_SRCHASH, in_gre_set_running(), in_gre_setup_socket(), in_pseudo(), IPPROTO_UDP, and IPVERSION.

Referenced by in_gre_ioctl(), and in_gre_setopts().

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◆ in_gre_checkdup()

static int in_gre_checkdup	(	const struct gre_softc *	sc,
		in_addr_t	src,
		in_addr_t	dst,
		uint32_t	opts
	)

static

Definition at line 125 of file ip_gre.c.

References GRE_HASH, and in_gre_lookup_socket().

Referenced by in_gre_ioctl(), and in_gre_setopts().

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◆ in_gre_hashval()

static uint32_t in_gre_hashval	(	in_addr_t	src,
		in_addr_t	dst
	)

static

Definition at line 102 of file ip_gre.c.

◆ in_gre_init()

void in_gre_init ( void )

Definition at line 556 of file ip_gre.c.

References ecookie, in_gre_srcaddr(), ip_encap_attach(), ip_encap_register_srcaddr(), ipv4_encap_cfg, and ipv4_srcaddrtab.

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◆ in_gre_ioctl()

int in_gre_ioctl	(	struct gre_softc *	sc,
		u_long	cmd,
		caddr_t	data
	)

Definition at line 434 of file ip_gre.c.

References in_gre_attach(), in_gre_checkdup(), INADDR_ANY, ip::ip_dst, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_len, V_ipv4_hashtbl, V_ipv4_sockets, and V_ipv4_srchashtbl.

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◆ in_gre_lookup()

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

static

Definition at line 157 of file ip_gre.c.

References ENCAP_DRV_LOOKUP, GRE_HASH, ip::ip_dst, in_addr::s_addr, and V_ipv4_hashtbl.

◆ in_gre_lookup_socket()

static struct gre_socket * in_gre_lookup_socket ( in_addr_t addr )

static

Definition at line 111 of file ip_gre.c.

References in_gre_socket::addr, in_gre_socket::base, and GRE_SOCKHASH.

Referenced by in_gre_checkdup(), and in_gre_setup_socket().

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◆ in_gre_output()

int in_gre_output	(	struct mbuf *	m,
		int	af,
		int	hlen
	)

Definition at line 516 of file ip_gre.c.

References ip_fillid(), IP_FORWARDING, ip_id, ip_output(), ip_tos, and V_ip_gre_ttl.

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◆ in_gre_set_running()

static void in_gre_set_running ( struct gre_softc * sc )

static

Definition at line 188 of file ip_gre.c.

References in_localip().

Referenced by in_gre_attach(), and in_gre_srcaddr().

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◆ in_gre_setopts()

int in_gre_setopts	(	struct gre_softc *	sc,
		u_long	cmd,
		uint32_t	value
	)

Definition at line 392 of file ip_gre.c.

References in_gre_attach(), and in_gre_checkdup().

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◆ in_gre_setup_socket()

static int in_gre_setup_socket ( struct gre_softc * sc )

static

Definition at line 246 of file ip_gre.c.

References in_gre_socket::addr, in_gre_socket::base, GRE_SOCKHASH, in_gre_lookup_socket(), in_gre_udp_input(), IPPROTO_IP, IPPROTO_UDP, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_len, sockaddr_in::sin_port, and udp_set_kernel_tunneling().

Referenced by in_gre_attach().

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◆ in_gre_srcaddr()

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

static

Definition at line 203 of file ip_gre.c.

References GRE_SRCHASH, in_gre_set_running(), in_addr::s_addr, sockaddr_in::sin_addr, and V_ipv4_hashtbl.

Referenced by in_gre_init().

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◆ in_gre_udp_input()

static void in_gre_udp_input	(	struct mbuf *	m,
		int	off,
		struct inpcb *	inp,
		const struct sockaddr *	sa,
		void *	ctx
	)

static

Definition at line 223 of file ip_gre.c.

References IPPROTO_UDP.

Referenced by in_gre_setup_socket().

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◆ in_gre_uninit()

void in_gre_uninit ( void )

Definition at line 567 of file ip_gre.c.

References ecookie, ip_encap_detach(), ip_encap_unregister_srcaddr(), ipv4_srcaddrtab, V_ipv4_hashtbl, V_ipv4_sockets, and V_ipv4_srchashtbl.

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◆ SYSCTL_INT()

SYSCTL_INT	(	_net_inet_ip	,
		OID_AUTO	,
		grettl	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEip_gre_ttl,
		0	,
		"Default TTL value for encapsulated packets"
	)

◆ VNET_DEFINE()

VNET_DEFINE	(	int	,
		ip_gre_ttl
	)

◆ VNET_DEFINE_STATIC() [1/3]

VNET_DEFINE_STATIC	(	struct gre_list *	,
		ipv4_hashtbl
	)

◆ VNET_DEFINE_STATIC() [2/3]

VNET_DEFINE_STATIC	(	struct gre_list *	,
		ipv4_srchashtbl
	)

◆ VNET_DEFINE_STATIC() [3/3]

VNET_DEFINE_STATIC	(	struct gre_sockets *	,
		ipv4_sockets
	)

Variable Documentation

◆ ecookie

const struct encaptab* ecookie = NULL

static

Definition at line 546 of file ip_gre.c.

Referenced by in_gre_init(), and in_gre_uninit().

◆ ipv4_encap_cfg

const struct encap_config ipv4_encap_cfg

static

Initial value:

= {
        .proto = IPPROTO_GRE,
        .min_length = sizeof(struct greip) + sizeof(struct ip),
        .exact_match = ENCAP_DRV_LOOKUP,
        .lookup = in_gre_lookup,
        .input = gre_input
}

Definition at line 547 of file ip_gre.c.

Referenced by in_gre_init().

◆ ipv4_srcaddrtab

const struct srcaddrtab* ipv4_srcaddrtab = NULL

static

Definition at line 545 of file ip_gre.c.

Referenced by in_gre_init(), and in_gre_uninit().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ GRE_HASH

◆ GRE_HASH_SC

◆ GRE_SOCKHASH

◆ GRE_SRCHASH

◆ GRE_TTL

◆ V_ip_gre_ttl

◆ V_ipv4_hashtbl

◆ V_ipv4_sockets

◆ V_ipv4_srchashtbl

Function Documentation

◆ __FBSDID()

◆ in_gre_attach()

◆ in_gre_checkdup()

◆ in_gre_hashval()

◆ in_gre_init()

◆ in_gre_ioctl()

◆ in_gre_lookup()

◆ in_gre_lookup_socket()

◆ in_gre_output()

◆ in_gre_set_running()

◆ in_gre_setopts()

◆ in_gre_setup_socket()

◆ in_gre_srcaddr()

◆ in_gre_udp_input()

◆ in_gre_uninit()

◆ SYSCTL_INT()

◆ VNET_DEFINE()

◆ VNET_DEFINE_STATIC() [1/3]

◆ VNET_DEFINE_STATIC() [2/3]

◆ VNET_DEFINE_STATIC() [3/3]

Variable Documentation

◆ ecookie

◆ ipv4_encap_cfg

◆ ipv4_srcaddrtab