ng_iface.c File Reference

#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/random.h>
#include <sys/rmlock.h>
#include <sys/sockio.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/libkern.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_types.h>
#include <net/bpf.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_parse.h>
#include <netgraph/ng_iface.h>

Include dependency graph for ng_iface.c:

Go to the source code of this file.

Data Structures
struct	iffam
struct	ng_iface_private

Macros
#define	M_NETGRAPH_IFACE   M_NETGRAPH
#define	V_ng_iface_max_nest   VNET(ng_iface_max_nest)
#define	NUM_FAMILIES   nitems(gFamilies)
#define	PRIV_RLOCK(priv, t)   rm_rlock(&priv->lock, t)
#define	PRIV_RUNLOCK(priv, t)   rm_runlock(&priv->lock, t)
#define	PRIV_WLOCK(priv)   rm_wlock(&priv->lock)
#define	PRIV_WUNLOCK(priv)   rm_wunlock(&priv->lock)
#define	V_ng_iface_unit   VNET(ng_iface_unit)

Typedefs
typedef const struct iffam *	iffam_p
typedef struct ng_iface_private *	priv_p

Functions
static	SYSCTL_NODE (_net_graph, OID_AUTO, iface, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "Point to point netgraph interface")
	VNET_DEFINE_STATIC (int, ng_iface_max_nest)
	SYSCTL_INT (_net_graph_iface, OID_AUTO, max_nesting, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(ng_iface_max_nest), 0, "Max nested tunnels")
static void	ng_iface_start (struct ifnet *ifp)
static int	ng_iface_ioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
static int	ng_iface_output (struct ifnet *ifp, struct mbuf *m0, const struct sockaddr *dst, struct route *ro)
static void	ng_iface_bpftap (struct ifnet *ifp, struct mbuf *m, sa_family_t family)
static int	ng_iface_send (struct ifnet *ifp, struct mbuf *m, sa_family_t sa)
static int	ng_iface_mod_event (module_t, int, void *)
static iffam_p	get_iffam_from_af (sa_family_t family)
static iffam_p	get_iffam_from_hook (priv_p priv, hook_p hook)
static iffam_p	get_iffam_from_name (const char *name)
static hook_p *	get_hook_from_iffam (priv_p priv, iffam_p iffam)
	NETGRAPH_INIT (iface, &typestruct)
	VNET_DEFINE_STATIC (struct unrhdr *, ng_iface_unit)
static int	ng_iface_constructor (node_p node)
static int	ng_iface_newhook (node_p node, hook_p hook, const char *name)
static int	ng_iface_rcvmsg (node_p node, item_p item, hook_p lasthook)
static int	ng_iface_rcvdata (hook_p hook, item_p item)
static int	ng_iface_shutdown (node_p node)
static int	ng_iface_disconnect (hook_p hook)
static void	vnet_ng_iface_init (const void *unused)
	VNET_SYSINIT (vnet_ng_iface_init, SI_SUB_PSEUDO, SI_ORDER_ANY, vnet_ng_iface_init, NULL)
static void	vnet_ng_iface_uninit (const void *unused)
	VNET_SYSUNINIT (vnet_ng_iface_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, vnet_ng_iface_uninit, NULL)

Variables
static const struct iffam	gFamilies []
static ng_constructor_t	ng_iface_constructor
static ng_rcvmsg_t	ng_iface_rcvmsg
static ng_shutdown_t	ng_iface_shutdown
static ng_newhook_t	ng_iface_newhook
static ng_rcvdata_t	ng_iface_rcvdata
static ng_disconnect_t	ng_iface_disconnect
static const struct ng_cmdlist	ng_iface_cmds []
static struct ng_type	typestruct

Macro Definition Documentation

M_NETGRAPH_IFACE

#define M_NETGRAPH_IFACE   M_NETGRAPH

Definition at line 93 of file ng_iface.c.

NUM_FAMILIES

#define NUM_FAMILIES   nitems(gFamilies)

Definition at line 115 of file ng_iface.c.

PRIV_RLOCK

#define PRIV_RLOCK	(		priv,
			t
	)		rm_rlock(&priv->lock, t)

Definition at line 127 of file ng_iface.c.

PRIV_RUNLOCK

#define PRIV_RUNLOCK	(		priv,
			t
	)		rm_runlock(&priv->lock, t)

Definition at line 128 of file ng_iface.c.

PRIV_WLOCK

#define PRIV_WLOCK

(

priv

)

rm_wlock(&priv->lock)

Definition at line 129 of file ng_iface.c.

PRIV_WUNLOCK

#define PRIV_WUNLOCK

(

priv

)

rm_wunlock(&priv->lock)

Definition at line 130 of file ng_iface.c.

V_ng_iface_max_nest

#define V_ng_iface_max_nest   VNET(ng_iface_max_nest)

Definition at line 99 of file ng_iface.c.

V_ng_iface_unit

#define V_ng_iface_unit   VNET(ng_iface_unit)

Definition at line 209 of file ng_iface.c.

Typedef Documentation

iffam_p

typedef const struct iffam* iffam_p

Definition at line 108 of file ng_iface.c.

priv_p

typedef struct ng_iface_private* priv_p

Definition at line 125 of file ng_iface.c.

Function Documentation

get_hook_from_iffam()

static __inline hook_p * get_hook_from_iffam ( priv_p  priv, iffam_p  iffam  )

static

Definition at line 251 of file ng_iface.c.

References gFamilies.

Referenced by ng_iface_disconnect(), ng_iface_newhook(), and ng_iface_send().

Here is the caller graph for this function:

get_iffam_from_af()

static __inline iffam_p get_iffam_from_af ( sa_family_t  family )

static

Definition at line 219 of file ng_iface.c.

References iffam::family, gFamilies, and NUM_FAMILIES.

Referenced by ng_iface_send().

Here is the caller graph for this function:

get_iffam_from_hook()

static __inline iffam_p get_iffam_from_hook ( priv_p  priv, hook_p  hook  )

static

Definition at line 236 of file ng_iface.c.

References gFamilies, and NUM_FAMILIES.

Referenced by ng_iface_disconnect(), and ng_iface_rcvdata().

Here is the caller graph for this function:

get_iffam_from_name()

static __inline iffam_p get_iffam_from_name ( const char *  name )

static

Definition at line 260 of file ng_iface.c.

References gFamilies, iffam::hookname, name, and NUM_FAMILIES.

Referenced by ng_iface_newhook().

Here is the caller graph for this function:

NETGRAPH_INIT()

NETGRAPH_INIT	(	iface	,
		&	typestruct
	)

ng_iface_bpftap()

static void ng_iface_bpftap ( struct ifnet *  ifp, struct mbuf *  m, sa_family_t  family  )

static

Definition at line 419 of file ng_iface.c.

Referenced by ng_iface_output(), and ng_iface_rcvdata().

Here is the caller graph for this function:

ng_iface_constructor()

static int ng_iface_constructor ( node_p  node )

static

Definition at line 520 of file ng_iface.c.

References ifqmaxlen, M_NETGRAPH_IFACE, NG_IFACE_IFACE_NAME, ng_iface_ioctl(), NG_IFACE_MTU_DEFAULT, ng_iface_output(), ng_iface_start(), ng_name_node(), NG_NODE_SET_PRIVATE, and V_ng_iface_unit.

Here is the call graph for this function:

ng_iface_disconnect()

static int ng_iface_disconnect ( hook_p  hook )

static

Definition at line 770 of file ng_iface.c.

References get_hook_from_iffam(), get_iffam_from_hook(), NG_HOOK_NODE, NG_NODE_PRIVATE, PRIV_WLOCK, and PRIV_WUNLOCK.

Here is the call graph for this function:

ng_iface_ioctl()

static int ng_iface_ioctl ( struct ifnet *  ifp, u_long  cmd, caddr_t  data  )

static

Definition at line 281 of file ng_iface.c.

References data, NG_IFACE_MTU_MAX, and NG_IFACE_MTU_MIN.

Referenced by ng_iface_constructor().

Here is the caller graph for this function:

ng_iface_mod_event()

static int ng_iface_mod_event ( module_t  mod, int  event, void *  data  )

static

Definition at line 787 of file ng_iface.c.

References event.

ng_iface_newhook()

static int ng_iface_newhook ( node_p  node, hook_p  hook, const char *  name  )

static

Definition at line 578 of file ng_iface.c.

References get_hook_from_iffam(), get_iffam_from_name(), name, NG_HOOK_HI_STACK, NG_HOOK_SET_TO_INBOUND, NG_NODE_PRIVATE, PRIV_WLOCK, and PRIV_WUNLOCK.

Here is the call graph for this function:

ng_iface_output()

static int ng_iface_output ( struct ifnet *  ifp, struct mbuf *  m0, const struct sockaddr *  dst, struct route *  ro  )

static

Definition at line 349 of file ng_iface.c.

References ng_iface_bpftap(), ng_iface_send(), NGM_IFACE_COOKIE, and V_ng_iface_max_nest.

Referenced by ng_iface_constructor().

Here is the call graph for this function:

Here is the caller graph for this function:

ng_iface_rcvdata()

static int ng_iface_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 684 of file ng_iface.c.

References iffam::family, get_iffam_from_hook(), NG_FREE_ITEM, NG_FREE_M, NG_HOOK_NODE, ng_iface_bpftap(), NG_NODE_PRIVATE, and NGI_GET_M.

Here is the call graph for this function:

ng_iface_rcvmsg()

static int ng_iface_rcvmsg ( node_p  node, item_p  item, hook_p  lasthook  )

static

Definition at line 603 of file ng_iface.c.

References ng_mesg::ng_msghdr::cmd, ng_mesg::data, ng_mesg::header, NG_FREE_MSG, NG_MKRESPONSE, NG_NODE_PRIVATE, NG_RESPOND_MSG, NGI_GET_MSG, NGM_FLOW_COOKIE, NGM_IFACE_BROADCAST, NGM_IFACE_COOKIE, NGM_IFACE_GET_IFINDEX, NGM_IFACE_GET_IFNAME, NGM_IFACE_POINT2POINT, NGM_LINK_IS_DOWN, NGM_LINK_IS_UP, and ng_mesg::ng_msghdr::typecookie.

ng_iface_send()

static int ng_iface_send ( struct ifnet *  ifp, struct mbuf *  m, sa_family_t  sa  )

static

Definition at line 434 of file ng_iface.c.

References get_hook_from_iffam(), get_iffam_from_af(), NG_FREE_M, NG_HOOK_REF, NG_HOOK_UNREF, NG_OUTBOUND_THREAD_REF, NG_OUTBOUND_THREAD_UNREF, NG_SEND_DATA_ONLY, PRIV_RLOCK, and PRIV_RUNLOCK.

Referenced by ng_iface_output(), and ng_iface_start().

Here is the call graph for this function:

Here is the caller graph for this function:

ng_iface_shutdown()

static int ng_iface_shutdown ( node_p  node )

static

Definition at line 743 of file ng_iface.c.

References M_NETGRAPH_IFACE, NG_NODE_PRIVATE, NG_NODE_SET_PRIVATE, NG_NODE_UNREF, and V_ng_iface_unit.

ng_iface_start()

static void ng_iface_start ( struct ifnet *  ifp )

static

Definition at line 397 of file ng_iface.c.

References ng_iface_send().

Referenced by ng_iface_constructor().

Here is the call graph for this function:

Here is the caller graph for this function:

SYSCTL_INT()

SYSCTL_INT	(	_net_graph_iface	,
		OID_AUTO	,
		max_nesting	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEng_iface_max_nest,
		0	,
		"Max nested tunnels"
	)

SYSCTL_NODE()

static SYSCTL_NODE ( _net_graph  , OID_AUTO  , iface  , CTLFLAG_RW|  CTLFLAG_MPSAFE, 0  , "Point to point netgraph interface"    )

static

VNET_DEFINE_STATIC() [1/2]

VNET_DEFINE_STATIC	(	int	,
		ng_iface_max_nest
	)

VNET_DEFINE_STATIC() [2/2]

VNET_DEFINE_STATIC	(	struct unrhdr *	,
		ng_iface_unit
	)

vnet_ng_iface_init()

static void vnet_ng_iface_init ( const void *  unused )

static

Definition at line 803 of file ng_iface.c.

References V_ng_iface_unit.

vnet_ng_iface_uninit()

static void vnet_ng_iface_uninit ( const void *  unused )

static

Definition at line 812 of file ng_iface.c.

References V_ng_iface_unit.

VNET_SYSINIT()

VNET_SYSINIT	(	vnet_ng_iface_init	,
		SI_SUB_PSEUDO	,
		SI_ORDER_ANY	,
		vnet_ng_iface_init	,
		NULL
	)

VNET_SYSUNINIT()

VNET_SYSUNINIT	(	vnet_ng_iface_uninit	,
		SI_SUB_INIT_IF	,
		SI_ORDER_ANY	,
		vnet_ng_iface_uninit	,
		NULL
	)

Variable Documentation

gFamilies

const struct iffam gFamilies[]

static

Initial value:

= {
        { AF_INET,      NG_IFACE_HOOK_INET      },
        { AF_INET6,     NG_IFACE_HOOK_INET6     },
}

Definition at line 111 of file ng_iface.c.

Referenced by get_hook_from_iffam(), get_iffam_from_af(), get_iffam_from_hook(), and get_iffam_from_name().

ng_iface_cmds

const struct ng_cmdlist ng_iface_cmds[]

static

Definition at line 161 of file ng_iface.c.

ng_iface_constructor

ng_constructor_t ng_iface_constructor

static

Definition at line 147 of file ng_iface.c.

ng_iface_disconnect

ng_disconnect_t ng_iface_disconnect

static

Definition at line 152 of file ng_iface.c.

ng_iface_newhook

ng_newhook_t ng_iface_newhook

static

Definition at line 150 of file ng_iface.c.

ng_iface_rcvdata

ng_rcvdata_t ng_iface_rcvdata

static

Definition at line 151 of file ng_iface.c.

ng_iface_rcvmsg

ng_rcvmsg_t ng_iface_rcvmsg

static

Definition at line 148 of file ng_iface.c.

ng_iface_shutdown

ng_shutdown_t ng_iface_shutdown

static

Definition at line 149 of file ng_iface.c.

typestruct

struct ng_type typestruct

static

Initial value:

= {
        .version =      NG_ABI_VERSION,
        .name =         NG_IFACE_NODE_TYPE,
        .mod_event =    ng_iface_mod_event,
        .constructor =  ng_iface_constructor,
        .rcvmsg =       ng_iface_rcvmsg,
        .shutdown =     ng_iface_shutdown,
        .newhook =      ng_iface_newhook,
        .rcvdata =      ng_iface_rcvdata,
        .disconnect =   ng_iface_disconnect,
        .cmdlist =      ng_iface_cmds,
}

Definition at line 194 of file ng_iface.c.