ip_divert.c File Reference

#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_sctp.h"
#include <sys/param.h>
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <net/vnet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/netisr.h>
#include <netinet/in.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 <security/mac/mac_framework.h>

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Macros
#define	DIVSNDQ   (65536 + 100)
#define	DIVRCVQ   (65536 + 100)
#define	V_divcbinfo   VNET(divcbinfo)

Functions
	__FBSDID ("$FreeBSD$")
	VNET_DEFINE_STATIC (struct inpcbinfo, divcbinfo)
static int	div_output_inbound (int fmaily, struct socket *so, struct mbuf *m, struct sockaddr_in *sin)
static int	div_output_outbound (int family, struct socket *so, struct mbuf *m)
	INPCBSTORAGE_DEFINE (divcbstor, "divinp", "divcb", "div", "divhash")
static void	div_init (void *arg __unused)
	VNET_SYSINIT (div_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, div_init, NULL)
static void	div_destroy (void *unused __unused)
	VNET_SYSUNINIT (divert, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, div_destroy, NULL)
static int	div_input (struct mbuf **mp, int *offp, int proto)
static bool	div_port_match (const struct inpcb *inp, void *v)
static void	divert_packet (struct mbuf *m, bool incoming)
static int	div_output (struct socket *so, struct mbuf *m, struct sockaddr_in *sin, struct mbuf *control)
static int	div_attach (struct socket *so, int proto, struct thread *td)
static void	div_detach (struct socket *so)
static int	div_bind (struct socket *so, struct sockaddr *nam, struct thread *td)
static int	div_shutdown (struct socket *so)
static int	div_send (struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, struct mbuf *control, struct thread *td)
static int	div_pcblist (SYSCTL_HANDLER_ARGS)
static int	div_modevent (module_t mod, int type, void *unused)
	DECLARE_MODULE (ipdivert, ipdivertmod, SI_SUB_PROTO_FIREWALL, SI_ORDER_ANY)
	MODULE_DEPEND (ipdivert, ipfw, 3, 3, 3)
	MODULE_VERSION (ipdivert, 1)

Variables
static u_long	div_sendspace = DIVSNDQ
static u_long	div_recvspace = DIVRCVQ
struct pr_usrreqs	div_usrreqs
struct protosw	div_protosw
static moduledata_t	ipdivertmod

Macro Definition Documentation

DIVRCVQ

#define DIVRCVQ   (65536 + 100)

Definition at line 85 of file ip_divert.c.

DIVSNDQ

#define DIVSNDQ   (65536 + 100)

Definition at line 84 of file ip_divert.c.

V_divcbinfo

#define V_divcbinfo   VNET(divcbinfo)

Definition at line 115 of file ip_divert.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

DECLARE_MODULE()

DECLARE_MODULE	(	ipdivert	,
		ipdivertmod	,
		SI_SUB_PROTO_FIREWALL	,
		SI_ORDER_ANY
	)

div_attach()

static int div_attach ( struct socket *  so, int  proto, struct thread *  td  )

static

Definition at line 574 of file ip_divert.c.

References div_recvspace, div_sendspace, in_pcballoc(), inpcb::inp_flags, INP_HDRINCL, inpcb::inp_ip_p, INP_IPV4, inpcb::inp_vflag, INP_WUNLOCK, sotoinpcb, and V_divcbinfo.

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div_bind()

static int div_bind ( struct socket *  so, struct sockaddr *  nam, struct thread *  td  )

static

Definition at line 613 of file ip_divert.c.

References in_pcbbind(), INADDR_ANY, INP_HASH_WLOCK, INP_HASH_WUNLOCK, INP_WLOCK, INP_WUNLOCK, sotoinpcb, and V_divcbinfo.

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div_destroy()

static void div_destroy ( void *unused  __unused )

static

Definition at line 143 of file ip_divert.c.

References in_pcbinfo_destroy(), and V_divcbinfo.

Referenced by div_modevent().

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div_detach()

static void div_detach ( struct socket *  so )

static

Definition at line 601 of file ip_divert.c.

References in_pcbdetach(), in_pcbfree(), INP_WLOCK, and sotoinpcb.

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div_init()

static void div_init ( void *arg  __unused )

static

Definition at line 130 of file ip_divert.c.

References in_pcbinfo_init(), and V_divcbinfo.

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div_input()

static int div_input ( struct mbuf **  mp, int *  offp, int  proto  )

static

Definition at line 155 of file ip_divert.c.

References KMOD_IPSTAT_INC.

div_modevent()

static int div_modevent ( module_t  mod, int  type, void *  unused  )

static

Definition at line 766 of file ip_divert.c.

References div_destroy(), div_protosw, divert_packet(), INP_INFO_WLOCK, INP_INFO_WUNLOCK, ip_divert_ptr, and V_divcbinfo.

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div_output()

static int div_output ( struct socket *  so, struct mbuf *  m, struct sockaddr_in *  sin, struct mbuf *  control  )

static

Definition at line 311 of file ip_divert.c.

References ipfw_rule_ref::chain_id, div_output_inbound(), div_output_outbound(), ipfw_rule_ref::info, ip::ip_v, IPFW_INFO_IN, IPFW_INFO_OUT, IPFW_IS_DIVERT, IPV6_VERSION, IPVERSION, MTAG_IPFW_RULE, ipfw_rule_ref::rule_id, ipfw_rule_ref::rulenum, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_len, sockaddr_in::sin_port, sockaddr_in::sin_zero, and ipfw_rule_ref::slot.

Referenced by div_send().

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div_output_inbound()

static int div_output_inbound ( int  fmaily, struct socket *  so, struct mbuf *  m, struct sockaddr_in *  sin  )

static

Definition at line 520 of file ip_divert.c.

References in_broadcast(), ip::ip_dst, in_addr::s_addr, sockaddr_in::sin_port, and sockaddr_in::sin_zero.

Referenced by div_output().

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div_output_outbound()

static int div_output_outbound ( int  family, struct socket *  so, struct mbuf *  m  )

static

Definition at line 417 of file ip_divert.c.

References inpcb::inp_moptions, inpcb::inp_options, INP_RLOCK, INP_RUNLOCK, IP_ALLOWBROADCAST, ip::ip_hl, ip::ip_len, ip_output(), IP_RAWOUTPUT, IP_ROUTETOIF, KMOD_IPSTAT_INC, and sotoinpcb.

Referenced by div_output().

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div_pcblist()

static int div_pcblist ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 673 of file ip_divert.c.

References in_pcbtoxinpcb(), INP_ALL_ITERATOR, inpcb::inp_gencnt, inp_next(), INP_RUNLOCK, INPLOOKUP_RLOCKPCB, and V_divcbinfo.

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div_port_match()

static bool div_port_match ( const struct inpcb *  inp, void *  v  )

static

Definition at line 165 of file ip_divert.c.

Referenced by divert_packet().

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div_send()

static int div_send ( struct socket *  so, int  flags, struct mbuf *  m, struct sockaddr *  nam, struct mbuf *  control, struct thread *  td  )

static

Definition at line 654 of file ip_divert.c.

References div_output(), and KMOD_IPSTAT_INC.

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div_shutdown()

static int div_shutdown ( struct socket *  so )

static

Definition at line 641 of file ip_divert.c.

References INP_WLOCK, INP_WUNLOCK, and sotoinpcb.

divert_packet()

static void divert_packet ( struct mbuf *  m, bool  incoming  )

static

Definition at line 179 of file ip_divert.c.

References div_port_match(), in_delayed_cksum(), INP_ITERATOR, inp_next(), INP_RUNLOCK, inpcb::inp_socket, INPLOOKUP_RLOCKPCB, ip::ip_hl, KMOD_IPSTAT_DEC, KMOD_IPSTAT_INC, MTAG_IPFW_RULE, ipfw_rule_ref::rulenum, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_len, sockaddr_in::sin_port, sockaddr_in::sin_zero, and V_divcbinfo.

Referenced by div_modevent().

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INPCBSTORAGE_DEFINE()

INPCBSTORAGE_DEFINE	(	divcbstor	,
		"divinp"	,
		"divcb"	,
		"div"	,
		"divhash"
	)

MODULE_DEPEND()

MODULE_DEPEND	(	ipdivert	,
		ipfw	,
		3	,
		3	,
		3
	)

MODULE_VERSION()

MODULE_VERSION	(	ipdivert	,
		1
	)

VNET_DEFINE_STATIC()

VNET_DEFINE_STATIC	(	struct inpcbinfo	,
		divcbinfo
	)

VNET_SYSINIT()

VNET_SYSINIT	(	div_init	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_THIRD	,
		div_init	,
		NULL
	)

VNET_SYSUNINIT()

VNET_SYSUNINIT	(	divert	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_THIRD	,
		div_destroy	,
		NULL
	)

Variable Documentation

div_protosw

struct protosw div_protosw

Initial value:

= {
        .pr_type =              SOCK_RAW,
        .pr_protocol =          IPPROTO_DIVERT,
        .pr_flags =             PR_ATOMIC|PR_ADDR,
        .pr_input =             div_input,
        .pr_usrreqs =           &div_usrreqs
}

Definition at line 757 of file ip_divert.c.

Referenced by div_modevent().

div_recvspace

u_long div_recvspace = DIVRCVQ

static

Definition at line 118 of file ip_divert.c.

Referenced by div_attach().

div_sendspace

u_long div_sendspace = DIVSNDQ

static

Definition at line 117 of file ip_divert.c.

Referenced by div_attach().

div_usrreqs

struct pr_usrreqs div_usrreqs

Initial value:

= {
        .pru_attach =           div_attach,
        .pru_bind =             div_bind,
        .pru_control =          in_control,
        .pru_detach =           div_detach,
        .pru_peeraddr =         in_getpeeraddr,
        .pru_send =             div_send,
        .pru_shutdown =         div_shutdown,
        .pru_sockaddr =         in_getsockaddr,
        .pru_sosetlabel =       in_pcbsosetlabel
}

Definition at line 745 of file ip_divert.c.

ipdivertmod

moduledata_t ipdivertmod

static

Initial value:

= {
        "ipdivert",
        div_modevent,
        0
}

Definition at line 822 of file ip_divert.c.