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/* $OpenBSD: if_var.h,v 1.71 2016/04/15 05:05:21 dlg Exp $ */
/* $NetBSD: if.h,v 1.23 1996/05/07 02:40:27 thorpej Exp $ */
/*
* Copyright (c) 2012-2013 Henning Brauer <henning@openbsd.org>
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _NET_IF_VAR_H_
#define _NET_IF_VAR_H_
#ifdef _KERNEL
#include <sys/queue.h>
#include <sys/mbuf.h>
#include <sys/srp.h>
#include <sys/refcnt.h>
#include <sys/task.h>
#include <sys/time.h>
#include <net/ifq.h>
/*
* Structures defining a network interface, providing a packet
* transport mechanism (ala level 0 of the PUP protocols).
*
* Each interface accepts output datagrams of a specified maximum
* length, and provides higher level routines with input datagrams
* received from its medium.
*
* Output occurs when the routine if_output is called, with four parameters:
* (*ifp->if_output)(ifp, m, dst, rt)
* Here m is the mbuf chain to be sent and dst is the destination address.
* The output routine encapsulates the supplied datagram if necessary,
* and then transmits it on its medium.
*
* On input, each interface unwraps the data received by it, and either
* places it on the input queue of an internetwork datagram routine
* and posts the associated software interrupt, or passes the datagram to a raw
* packet input routine.
*
* Routines exist for locating interfaces by their addresses
* or for locating an interface on a certain network, as well as more general
* routing and gateway routines maintaining information used to locate
* interfaces. These routines live in the files if.c and route.c
*/
struct rtentry;
struct timeout;
struct ifnet;
struct task;
/*
* Structure describing a `cloning' interface.
*/
struct if_clone {
LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */
const char *ifc_name; /* name of device, e.g. `gif' */
size_t ifc_namelen; /* length of name */
int (*ifc_create)(struct if_clone *, int);
int (*ifc_destroy)(struct ifnet *);
};
#define IF_CLONE_INITIALIZER(name, create, destroy) \
{ { 0 }, name, sizeof(name) - 1, create, destroy }
/*
* Structure defining a queue for a network interface.
*
* (Would like to call this struct ``if'', but C isn't PL/1.)
*/
TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */
struct ifnet { /* and the entries */
void *if_softc; /* lower-level data for this if */
struct refcnt if_refcnt;
TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */
TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */
TAILQ_HEAD(, ifmaddr) if_maddrlist; /* list of multicast records */
TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
struct hook_desc_head *if_addrhooks; /* address change callbacks */
struct hook_desc_head *if_linkstatehooks; /* link change callbacks */
struct hook_desc_head *if_detachhooks; /* detach callbacks */
/* check or clean routes (+ or -)'d */
void (*if_rtrequest)(struct ifnet *, int, struct rtentry *);
char if_xname[IFNAMSIZ]; /* external name (name + unit) */
int if_pcount; /* number of promiscuous listeners */
caddr_t if_bpf; /* packet filter structure */
caddr_t if_bridgeport; /* used by bridge ports */
caddr_t if_pf_kif; /* pf interface abstraction */
union {
caddr_t carp_s; /* carp structure (used by !carp ifs) */
struct ifnet *carp_d; /* ptr to carpdev (used by carp ifs) */
} if_carp_ptr;
#define if_carp if_carp_ptr.carp_s
#define if_carpdev if_carp_ptr.carp_d
unsigned int if_index; /* numeric abbreviation for this if */
short if_timer; /* time 'til if_watchdog called */
short if_flags; /* up/down, broadcast, etc. */
int if_xflags; /* extra softnet flags */
struct if_data if_data; /* stats and other data about if */
u_int32_t if_hardmtu; /* maximum MTU device supports */
char if_description[IFDESCRSIZE]; /* interface description */
u_short if_rtlabelid; /* next route label */
u_int8_t if_priority;
struct timeout *if_slowtimo; /* watchdog timeout */
struct task *if_watchdogtask; /* watchdog task */
struct task *if_linkstatetask; /* task to do route updates */
/* procedure handles */
SRPL_HEAD(, ifih) if_inputs; /* input routines (dequeue) */
/* output routine (enqueue) */
int (*if_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
struct rtentry *);
/* link level output function */
int (*if_ll_output)(struct ifnet *, struct mbuf *,
struct sockaddr *, struct rtentry *);
/* initiate output routine */
void (*if_start)(struct ifnet *);
/* ioctl routine */
int (*if_ioctl)(struct ifnet *, u_long, caddr_t);
/* timer routine */
void (*if_watchdog)(struct ifnet *);
int (*if_wol)(struct ifnet *, int);
struct ifqueue if_snd; /* output queue */
struct sockaddr_dl *if_sadl; /* pointer to our sockaddr_dl */
void *if_afdata[AF_MAX];
};
#define if_mtu if_data.ifi_mtu
#define if_type if_data.ifi_type
#define if_addrlen if_data.ifi_addrlen
#define if_hdrlen if_data.ifi_hdrlen
#define if_metric if_data.ifi_metric
#define if_link_state if_data.ifi_link_state
#define if_baudrate if_data.ifi_baudrate
#define if_ipackets if_data.ifi_ipackets
#define if_ierrors if_data.ifi_ierrors
#define if_opackets if_data.ifi_opackets
#define if_oerrors if_data.ifi_oerrors
#define if_collisions if_data.ifi_collisions
#define if_ibytes if_data.ifi_ibytes
#define if_obytes if_data.ifi_obytes
#define if_imcasts if_data.ifi_imcasts
#define if_omcasts if_data.ifi_omcasts
#define if_iqdrops if_data.ifi_iqdrops
#define if_oqdrops if_data.ifi_oqdrops
#define if_noproto if_data.ifi_noproto
#define if_lastchange if_data.ifi_lastchange
#define if_capabilities if_data.ifi_capabilities
#define if_rdomain if_data.ifi_rdomain
/*
* The ifaddr structure contains information about one address
* of an interface. They are maintained by the different address families,
* are allocated and attached when an address is set, and are linked
* together so all addresses for an interface can be located.
*/
struct ifaddr {
struct sockaddr *ifa_addr; /* address of interface */
struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
struct sockaddr *ifa_netmask; /* used to determine subnet */
struct ifnet *ifa_ifp; /* back-pointer to interface */
TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */
u_int ifa_flags; /* interface flags, see below */
u_int ifa_refcnt; /* number of `rt_ifa` references */
int ifa_metric; /* cost of going out this interface */
};
#define IFA_ROUTE 0x01 /* Auto-magically installed route */
/*
* Interface multicast address.
*/
struct ifmaddr {
struct sockaddr *ifma_addr; /* Protocol address */
unsigned int ifma_ifidx; /* Index of the interface */
unsigned int ifma_refcnt; /* Count of references */
TAILQ_ENTRY(ifmaddr) ifma_list; /* Per-interface list */
};
/*
* interface groups
*/
struct ifg_group {
char ifg_group[IFNAMSIZ];
u_int ifg_refcnt;
caddr_t ifg_pf_kif;
int ifg_carp_demoted;
TAILQ_HEAD(, ifg_member) ifg_members;
TAILQ_ENTRY(ifg_group) ifg_next;
};
struct ifg_member {
TAILQ_ENTRY(ifg_member) ifgm_next;
struct ifnet *ifgm_ifp;
};
struct ifg_list {
struct ifg_group *ifgl_group;
TAILQ_ENTRY(ifg_list) ifgl_next;
};
#define IFNET_SLOWHZ 1 /* granularity is 1 second */
/*
* IFQ compat on ifq API
*/
#define IFQ_ENQUEUE(ifq, m, err) \
do { \
(err) = ifq_enqueue((ifq), (m)); \
} while (/* CONSTCOND */0)
#define IFQ_DEQUEUE(ifq, m) \
do { \
(m) = ifq_dequeue(ifq); \
} while (/* CONSTCOND */0)
#define IFQ_PURGE(ifq) \
do { \
(void)ifq_purge(ifq); \
} while (/* CONSTCOND */0)
#define IFQ_LEN(ifq) ifq_len(ifq)
#define IFQ_IS_EMPTY(ifq) ifq_empty(ifq)
#define IFQ_SET_MAXLEN(ifq, len) ifq_set_maxlen(ifq, len)
/* default interface priorities */
#define IF_WIRED_DEFAULT_PRIORITY 0
#define IF_WIRELESS_DEFAULT_PRIORITY 4
#define IF_CARP_DEFAULT_PRIORITY 15
/*
* Network stack input queues.
*/
struct niqueue {
struct mbuf_queue ni_q;
u_int ni_isr;
};
#define NIQUEUE_INITIALIZER(_len, _isr) \
{ MBUF_QUEUE_INITIALIZER((_len), IPL_NET), (_isr) }
void niq_init(struct niqueue *, u_int, u_int);
int niq_enqueue(struct niqueue *, struct mbuf *);
int niq_enlist(struct niqueue *, struct mbuf_list *);
#define niq_dequeue(_q) mq_dequeue(&(_q)->ni_q)
#define niq_dechain(_q) mq_dechain(&(_q)->ni_q)
#define niq_delist(_q, _ml) mq_delist(&(_q)->ni_q, (_ml))
#define niq_len(_q) mq_len(&(_q)->ni_q)
#define niq_drops(_q) mq_drops(&(_q)->ni_q)
#define sysctl_niq(_n, _l, _op, _olp, _np, _nl, _niq) \
sysctl_mq((_n), (_l), (_op), (_olp), (_np), (_nl), &(_niq)->ni_q)
extern struct ifnet_head ifnet;
extern unsigned int lo0ifidx;
extern struct taskq *softnettq;
void if_start(struct ifnet *);
int if_enqueue_try(struct ifnet *, struct mbuf *);
int if_enqueue(struct ifnet *, struct mbuf *);
void if_input(struct ifnet *, struct mbuf_list *);
int if_input_local(struct ifnet *, struct mbuf *, sa_family_t);
void if_rtrequest_dummy(struct ifnet *, int, struct rtentry *);
void p2p_rtrequest(struct ifnet *, int, struct rtentry *);
struct ifaddr *ifa_ifwithaddr(struct sockaddr *, u_int);
struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *, u_int);
struct ifaddr *ifa_ifwithnet(struct sockaddr *, u_int);
struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
void ifafree(struct ifaddr *);
int if_isconnected(const struct ifnet *, unsigned int);
void if_clone_attach(struct if_clone *);
void if_clone_detach(struct if_clone *);
int if_clone_create(const char *);
int if_clone_destroy(const char *);
struct if_clone *
if_clone_lookup(const char *, int *);
int sysctl_mq(int *, u_int, void *, size_t *, void *, size_t,
struct mbuf_queue *);
void ifa_add(struct ifnet *, struct ifaddr *);
void ifa_del(struct ifnet *, struct ifaddr *);
void ifa_update_broadaddr(struct ifnet *, struct ifaddr *,
struct sockaddr *);
void if_ih_insert(struct ifnet *, int (*)(struct ifnet *, struct mbuf *,
void *), void *);
void if_ih_remove(struct ifnet *, int (*)(struct ifnet *, struct mbuf *,
void *), void *);
void if_rxr_init(struct if_rxring *, u_int, u_int);
u_int if_rxr_get(struct if_rxring *, u_int);
#define if_rxr_put(_r, _c) do { (_r)->rxr_alive -= (_c); } while (0)
#define if_rxr_inuse(_r) ((_r)->rxr_alive)
int if_rxr_info_ioctl(struct if_rxrinfo *, u_int, struct if_rxring_info *);
int if_rxr_ioctl(struct if_rxrinfo *, const char *, u_int,
struct if_rxring *);
#endif /* _KERNEL */
#endif /* _NET_IF_VAR_H_ */
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