ifq.h revision 138542
121259Swollman/* 221259Swollman * Copyright (c) 1982, 1986, 1989, 1993 321259Swollman * The Regents of the University of California. All rights reserved. 421259Swollman * 521259Swollman * Redistribution and use in source and binary forms, with or without 621259Swollman * modification, are permitted provided that the following conditions 721259Swollman * are met: 821259Swollman * 1. Redistributions of source code must retain the above copyright 921259Swollman * notice, this list of conditions and the following disclaimer. 1021259Swollman * 2. Redistributions in binary form must reproduce the above copyright 1121259Swollman * notice, this list of conditions and the following disclaimer in the 1221259Swollman * documentation and/or other materials provided with the distribution. 1321259Swollman * 4. Neither the name of the University nor the names of its contributors 1421259Swollman * may be used to endorse or promote products derived from this software 1521259Swollman * without specific prior written permission. 1621259Swollman * 1721259Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1821259Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1921259Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2021259Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2121259Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2221259Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2321259Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2421259Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2521259Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2621259Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2721259Swollman * SUCH DAMAGE. 2821259Swollman * 2921259Swollman * From: @(#)if.h 8.1 (Berkeley) 6/10/93 3050477Speter * $FreeBSD: head/sys/net/if_var.h 138542 2004-12-08 05:45:59Z sam $ 3121259Swollman */ 3221259Swollman 3321259Swollman#ifndef _NET_IF_VAR_H_ 3421259Swollman#define _NET_IF_VAR_H_ 3521259Swollman 3621259Swollman/* 3721259Swollman * Structures defining a network interface, providing a packet 3821259Swollman * transport mechanism (ala level 0 of the PUP protocols). 3921259Swollman * 4021259Swollman * Each interface accepts output datagrams of a specified maximum 4121259Swollman * length, and provides higher level routines with input datagrams 4221259Swollman * received from its medium. 4321259Swollman * 4421259Swollman * Output occurs when the routine if_output is called, with three parameters: 4521259Swollman * (*ifp->if_output)(ifp, m, dst, rt) 4621259Swollman * Here m is the mbuf chain to be sent and dst is the destination address. 4721259Swollman * The output routine encapsulates the supplied datagram if necessary, 4821259Swollman * and then transmits it on its medium. 4921259Swollman * 5021259Swollman * On input, each interface unwraps the data received by it, and either 51108533Sschweikh * places it on the input queue of an internetwork datagram routine 5221259Swollman * and posts the associated software interrupt, or passes the datagram to a raw 5321259Swollman * packet input routine. 5421259Swollman * 5521259Swollman * Routines exist for locating interfaces by their addresses 56108533Sschweikh * or for locating an interface on a certain network, as well as more general 5721259Swollman * routing and gateway routines maintaining information used to locate 5821259Swollman * interfaces. These routines live in the files if.c and route.c 5921259Swollman */ 6021259Swollman 6121259Swollman#ifdef __STDC__ 6221259Swollman/* 6321259Swollman * Forward structure declarations for function prototypes [sic]. 6421259Swollman */ 6521259Swollmanstruct mbuf; 6683366Sjulianstruct thread; 6721259Swollmanstruct rtentry; 6885074Srustruct rt_addrinfo; 6921259Swollmanstruct socket; 7021259Swollmanstruct ether_header; 7121259Swollman#endif 7221259Swollman 7321259Swollman#include <sys/queue.h> /* get TAILQ macros */ 7421259Swollman 7569224Sjlemon#ifdef _KERNEL 7669152Sjlemon#include <sys/mbuf.h> 77126264Smlaier#include <sys/eventhandler.h> 7869224Sjlemon#endif /* _KERNEL */ 7974914Sjhb#include <sys/lock.h> /* XXX */ 8074914Sjhb#include <sys/mutex.h> /* XXX */ 8183130Sjlemon#include <sys/event.h> /* XXX */ 82132712Srwatson#include <sys/_task.h> 8369152Sjlemon 84121816Sbrooks#define IF_DUNIT_NONE -1 85121816Sbrooks 86130416Smlaier#include <altq/if_altq.h> 87130416Smlaier 8860938SjakeTAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 8960938SjakeTAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 9060938SjakeTAILQ_HEAD(ifprefixhead, ifprefix); 9172084SphkTAILQ_HEAD(ifmultihead, ifmultiaddr); 9221259Swollman 9321259Swollman/* 9421259Swollman * Structure defining a queue for a network interface. 9521259Swollman */ 9621259Swollmanstruct ifqueue { 9721259Swollman struct mbuf *ifq_head; 9821259Swollman struct mbuf *ifq_tail; 9921259Swollman int ifq_len; 10021259Swollman int ifq_maxlen; 10121259Swollman int ifq_drops; 10269152Sjlemon struct mtx ifq_mtx; 10321259Swollman}; 10421259Swollman 10521259Swollman/* 10621259Swollman * Structure defining a network interface. 10721259Swollman * 10821259Swollman * (Would like to call this struct ``if'', but C isn't PL/1.) 10921259Swollman */ 11084380Smjacob 11184380Smjacob/* 11284380Smjacob * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 11384380Smjacob * one of these structures, typically held within an arpcom structure. 11486797Sluigi * 11586797Sluigi * struct <foo>_softc { 11686797Sluigi * struct arpcom { 11786797Sluigi * struct ifnet ac_if; 11886797Sluigi * ... 11986797Sluigi * } <arpcom> ; 12086797Sluigi * ... 12186797Sluigi * }; 12286797Sluigi * 12386797Sluigi * The assumption is used in a number of places, including many 12486797Sluigi * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 12586797Sluigi * 12686797Sluigi * Unfortunately devices' softc are opaque, so we depend on this layout 12786797Sluigi * to locate the struct ifnet from the softc in the generic code. 12886797Sluigi * 12984380Smjacob */ 13021259Swollmanstruct ifnet { 13121259Swollman void *if_softc; /* pointer to driver state */ 13260938Sjake TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 133121816Sbrooks char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 134121816Sbrooks const char *if_dname; /* driver name */ 135121816Sbrooks int if_dunit; /* unit or IF_DUNIT_NONE */ 13621259Swollman struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 137128291Sluigi /* 138128291Sluigi * if_addrhead is the list of all addresses associated to 139128315Sluigi * an interface. 140128315Sluigi * Some code in the kernel assumes that first element 141128315Sluigi * of the list has type AF_LINK, and contains sockaddr_dl 142128315Sluigi * addresses which store the link-level address and the name 143128291Sluigi * of the interface. 144128315Sluigi * However, access to the AF_LINK address through this 145128315Sluigi * field is deprecated. Use ifaddr_byindex() instead. 146128291Sluigi */ 147133741Sjmg struct knlist if_klist; /* events attached to this if */ 14883130Sjlemon int if_pcount; /* number of promiscuous listeners */ 149133261Smlaier void *if_carp; /* carp (tbd) interface pointer */ 15021259Swollman struct bpf_if *if_bpf; /* packet filter structure */ 15121259Swollman u_short if_index; /* numeric abbreviation for this if */ 15221259Swollman short if_timer; /* time 'til if_watchdog called */ 153106931Ssam u_short if_nvlans; /* number of active vlans */ 154102052Ssobomax int if_flags; /* up/down, broadcast, etc. */ 15583624Sjlemon int if_capabilities; /* interface capabilities */ 15683624Sjlemon int if_capenable; /* enabled features */ 15721259Swollman void *if_linkmib; /* link-type-specific MIB data */ 15821259Swollman size_t if_linkmiblen; /* length of above data */ 15921259Swollman struct if_data if_data; 16021404Swollman struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 16121404Swollman int if_amcount; /* number of all-multicast requests */ 16221259Swollman/* procedure handles */ 16321259Swollman int (*if_output) /* output routine (enqueue) */ 16492725Salfred (struct ifnet *, struct mbuf *, struct sockaddr *, 16592725Salfred struct rtentry *); 166106931Ssam void (*if_input) /* input routine (from h/w driver) */ 167106931Ssam (struct ifnet *, struct mbuf *); 16821259Swollman void (*if_start) /* initiate output routine */ 16992725Salfred (struct ifnet *); 17021259Swollman int (*if_ioctl) /* ioctl routine */ 17192725Salfred (struct ifnet *, u_long, caddr_t); 17221259Swollman void (*if_watchdog) /* timer routine */ 17392725Salfred (struct ifnet *); 17421259Swollman void (*if_init) /* Init routine */ 17592725Salfred (void *); 17621404Swollman int (*if_resolvemulti) /* validate/resolve multicast */ 17792725Salfred (struct ifnet *, struct sockaddr **, struct sockaddr *); 178137062Srwatson void *if_spare1; /* spare pointer 1 */ 179137062Srwatson void *if_spare2; /* spare pointer 2 */ 180137062Srwatson void *if_spare3; /* spare pointer 3 */ 181137062Srwatson u_int if_spare_flags1; /* spare flags 1 */ 182137062Srwatson u_int if_spare_flags2; /* spare flags 2 */ 183130416Smlaier struct ifaltq if_snd; /* output queue (includes altq) */ 184123220Simp const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 185127828Sluigi 186127828Sluigi struct lltable *lltables; /* list of L3-L2 resolution tables */ 187127828Sluigi 188122524Srwatson struct label *if_label; /* interface MAC label */ 189121161Sume 190127828Sluigi /* these are only used by IPv6 */ 191127828Sluigi struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 192121161Sume void *if_afdata[AF_MAX]; 193121470Sume int if_afdata_initialized; 194121470Sume struct mtx if_afdata_mtx; 195132712Srwatson struct task if_starttask; /* task for IFF_NEEDSGIANT */ 19621259Swollman}; 19769152Sjlemon 19892725Salfredtypedef void if_init_f_t(void *); 19921259Swollman 200128376Sluigi/* 201128376Sluigi * XXX These aliases are terribly dangerous because they could apply 202128376Sluigi * to anything. 203128376Sluigi */ 20421259Swollman#define if_mtu if_data.ifi_mtu 20521259Swollman#define if_type if_data.ifi_type 20621259Swollman#define if_physical if_data.ifi_physical 20721259Swollman#define if_addrlen if_data.ifi_addrlen 20821259Swollman#define if_hdrlen if_data.ifi_hdrlen 20921259Swollman#define if_metric if_data.ifi_metric 210128871Sandre#define if_link_state if_data.ifi_link_state 21121259Swollman#define if_baudrate if_data.ifi_baudrate 21258698Sjlemon#define if_hwassist if_data.ifi_hwassist 21321259Swollman#define if_ipackets if_data.ifi_ipackets 21421259Swollman#define if_ierrors if_data.ifi_ierrors 21521259Swollman#define if_opackets if_data.ifi_opackets 21621259Swollman#define if_oerrors if_data.ifi_oerrors 21721259Swollman#define if_collisions if_data.ifi_collisions 21821259Swollman#define if_ibytes if_data.ifi_ibytes 21921259Swollman#define if_obytes if_data.ifi_obytes 22021259Swollman#define if_imcasts if_data.ifi_imcasts 22121259Swollman#define if_omcasts if_data.ifi_omcasts 22221259Swollman#define if_iqdrops if_data.ifi_iqdrops 22321259Swollman#define if_noproto if_data.ifi_noproto 22421259Swollman#define if_lastchange if_data.ifi_lastchange 22521259Swollman#define if_recvquota if_data.ifi_recvquota 22621259Swollman#define if_xmitquota if_data.ifi_xmitquota 227136950Sjmg#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)NULL) 22821259Swollman 22953541Sshin/* for compatibility with other BSDs */ 23053541Sshin#define if_addrlist if_addrhead 23153541Sshin#define if_list if_link 23253541Sshin 23321259Swollman/* 23421259Swollman * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 23521259Swollman * are queues of messages stored on ifqueue structures 23621259Swollman * (defined above). Entries are added to and deleted from these structures 23721259Swollman * by these macros, which should be called with ipl raised to splimp(). 23821259Swollman */ 23972200Sbmilekic#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 24072200Sbmilekic#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 241130416Smlaier#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED) 24269152Sjlemon#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 24369152Sjlemon#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 24469152Sjlemon#define _IF_QLEN(ifq) ((ifq)->ifq_len) 24521259Swollman 24669152Sjlemon#define _IF_ENQUEUE(ifq, m) do { \ 24769152Sjlemon (m)->m_nextpkt = NULL; \ 24869152Sjlemon if ((ifq)->ifq_tail == NULL) \ 24969152Sjlemon (ifq)->ifq_head = m; \ 25069152Sjlemon else \ 25169152Sjlemon (ifq)->ifq_tail->m_nextpkt = m; \ 25269152Sjlemon (ifq)->ifq_tail = m; \ 25369152Sjlemon (ifq)->ifq_len++; \ 25469152Sjlemon} while (0) 25569152Sjlemon 25669152Sjlemon#define IF_ENQUEUE(ifq, m) do { \ 25769152Sjlemon IF_LOCK(ifq); \ 25869152Sjlemon _IF_ENQUEUE(ifq, m); \ 25969152Sjlemon IF_UNLOCK(ifq); \ 26069152Sjlemon} while (0) 26169152Sjlemon 26269152Sjlemon#define _IF_PREPEND(ifq, m) do { \ 26369152Sjlemon (m)->m_nextpkt = (ifq)->ifq_head; \ 26469152Sjlemon if ((ifq)->ifq_tail == NULL) \ 26569152Sjlemon (ifq)->ifq_tail = (m); \ 26669152Sjlemon (ifq)->ifq_head = (m); \ 26769152Sjlemon (ifq)->ifq_len++; \ 26869152Sjlemon} while (0) 26969152Sjlemon 27069152Sjlemon#define IF_PREPEND(ifq, m) do { \ 27169152Sjlemon IF_LOCK(ifq); \ 27269152Sjlemon _IF_PREPEND(ifq, m); \ 27369152Sjlemon IF_UNLOCK(ifq); \ 27469152Sjlemon} while (0) 27569152Sjlemon 27669152Sjlemon#define _IF_DEQUEUE(ifq, m) do { \ 27769152Sjlemon (m) = (ifq)->ifq_head; \ 27869152Sjlemon if (m) { \ 279136950Sjmg if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ 28069152Sjlemon (ifq)->ifq_tail = NULL; \ 28169152Sjlemon (m)->m_nextpkt = NULL; \ 28269152Sjlemon (ifq)->ifq_len--; \ 28369152Sjlemon } \ 28469152Sjlemon} while (0) 28569152Sjlemon 28669152Sjlemon#define IF_DEQUEUE(ifq, m) do { \ 28769152Sjlemon IF_LOCK(ifq); \ 28869152Sjlemon _IF_DEQUEUE(ifq, m); \ 28969152Sjlemon IF_UNLOCK(ifq); \ 29069152Sjlemon} while (0) 29169152Sjlemon 292130416Smlaier#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 293130416Smlaier#define IF_POLL(ifq, m) _IF_POLL(ifq, m) 294130416Smlaier 295130416Smlaier#define _IF_DRAIN(ifq) do { \ 29669152Sjlemon struct mbuf *m; \ 29769152Sjlemon for (;;) { \ 29869152Sjlemon _IF_DEQUEUE(ifq, m); \ 29969152Sjlemon if (m == NULL) \ 30069152Sjlemon break; \ 30169152Sjlemon m_freem(m); \ 30269152Sjlemon } \ 30369152Sjlemon} while (0) 30469152Sjlemon 305130416Smlaier#define IF_DRAIN(ifq) do { \ 306130416Smlaier IF_LOCK(ifq); \ 307130416Smlaier _IF_DRAIN(ifq); \ 308130416Smlaier IF_UNLOCK(ifq); \ 309130416Smlaier} while(0) 310130416Smlaier 31155205Speter#ifdef _KERNEL 312126264Smlaier/* interface address change event */ 313126264Smlaiertypedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 314126264SmlaierEVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 315126264Smlaier/* new interface arrival event */ 316126264Smlaiertypedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 317126264SmlaierEVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 318126264Smlaier/* interface departure event */ 319126264Smlaiertypedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 320126264SmlaierEVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 321126264Smlaier 322121470Sume#define IF_AFDATA_LOCK_INIT(ifp) \ 323121470Sume mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 324121470Sume#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 325121470Sume#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 326121470Sume#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 327121470Sume#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 328121470Sume 329136704Srwatson#define IFF_LOCKGIANT(ifp) do { \ 330136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 331136704Srwatson mtx_lock(&Giant); \ 332136704Srwatson} while (0) 333136704Srwatson 334136704Srwatson#define IFF_UNLOCKGIANT(ifp) do { \ 335136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 336136704Srwatson mtx_unlock(&Giant); \ 337136704Srwatson} while (0) 338136704Srwatson 339137065Srwatsonint if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, 340137065Srwatson int adjust); 341130416Smlaier#define IF_HANDOFF(ifq, m, ifp) \ 342130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, 0) 343130416Smlaier#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \ 344130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, adj) 34521259Swollman 346132712Srwatsonvoid if_start(struct ifnet *); 347132712Srwatson 348130416Smlaier#define IFQ_ENQUEUE(ifq, m, err) \ 349130416Smlaierdo { \ 350130416Smlaier IF_LOCK(ifq); \ 351130416Smlaier if (ALTQ_IS_ENABLED(ifq)) \ 352130416Smlaier ALTQ_ENQUEUE(ifq, m, NULL, err); \ 353130416Smlaier else { \ 354130416Smlaier if (_IF_QFULL(ifq)) { \ 355130416Smlaier m_freem(m); \ 356130416Smlaier (err) = ENOBUFS; \ 357130416Smlaier } else { \ 358130416Smlaier _IF_ENQUEUE(ifq, m); \ 359130416Smlaier (err) = 0; \ 360130416Smlaier } \ 361130416Smlaier } \ 362130416Smlaier if (err) \ 363130416Smlaier (ifq)->ifq_drops++; \ 364130416Smlaier IF_UNLOCK(ifq); \ 365130416Smlaier} while (0) 36621259Swollman 367130416Smlaier#define IFQ_DEQUEUE_NOLOCK(ifq, m) \ 368130416Smlaierdo { \ 369130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 370130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \ 371130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 372130416Smlaier ALTQ_DEQUEUE(ifq, m); \ 373130416Smlaier else \ 374130416Smlaier _IF_DEQUEUE(ifq, m); \ 375130416Smlaier} while (0) 376130416Smlaier 377130416Smlaier#define IFQ_DEQUEUE(ifq, m) \ 378130416Smlaierdo { \ 379130416Smlaier IF_LOCK(ifq); \ 380130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 381130416Smlaier IF_UNLOCK(ifq); \ 382130416Smlaier} while (0) 383130416Smlaier 384130416Smlaier#define IFQ_POLL_NOLOCK(ifq, m) \ 385130416Smlaierdo { \ 386130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 387130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \ 388130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 389130416Smlaier ALTQ_POLL(ifq, m); \ 390130416Smlaier else \ 391130416Smlaier _IF_POLL(ifq, m); \ 392130416Smlaier} while (0) 393130416Smlaier 394130416Smlaier#define IFQ_POLL(ifq, m) \ 395130416Smlaierdo { \ 396130416Smlaier IF_LOCK(ifq); \ 397130416Smlaier IFQ_POLL_NOLOCK(ifq, m); \ 398130416Smlaier IF_UNLOCK(ifq); \ 399130416Smlaier} while (0) 400130416Smlaier 401130416Smlaier#define IFQ_PURGE_NOLOCK(ifq) \ 402130416Smlaierdo { \ 403130416Smlaier if (ALTQ_IS_ENABLED(ifq)) { \ 404130416Smlaier ALTQ_PURGE(ifq); \ 405130416Smlaier } else \ 406130416Smlaier _IF_DRAIN(ifq); \ 407130416Smlaier} while (0) 408130416Smlaier 409130416Smlaier#define IFQ_PURGE(ifq) \ 410130416Smlaierdo { \ 411130416Smlaier IF_LOCK(ifq); \ 412130416Smlaier IFQ_PURGE_NOLOCK(ifq); \ 413130416Smlaier IF_UNLOCK(ifq); \ 414130416Smlaier} while (0) 415130416Smlaier 416130416Smlaier#define IFQ_SET_READY(ifq) \ 417130416Smlaier do { ((ifq)->altq_flags |= ALTQF_READY); } while (0) 418130416Smlaier 419130416Smlaier#define IFQ_LOCK(ifq) IF_LOCK(ifq) 420130416Smlaier#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq) 421130416Smlaier#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq) 422130416Smlaier#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 423130416Smlaier#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 424130416Smlaier#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 425130416Smlaier#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 426130416Smlaier#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 427130416Smlaier 428130416Smlaier#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \ 429130416Smlaierdo { \ 430130416Smlaier int len; \ 431130416Smlaier short mflags; \ 432130416Smlaier \ 433130416Smlaier len = (m)->m_pkthdr.len; \ 434130416Smlaier mflags = (m)->m_flags; \ 435130416Smlaier IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \ 436130416Smlaier if ((err) == 0) { \ 437130416Smlaier (ifp)->if_obytes += len + (adj); \ 438130416Smlaier if (mflags & M_MCAST) \ 439130416Smlaier (ifp)->if_omcasts++; \ 440130416Smlaier if (((ifp)->if_flags & IFF_OACTIVE) == 0) \ 441132712Srwatson if_start(ifp); \ 442130416Smlaier } \ 443130416Smlaier} while (0) 444130416Smlaier 445130416Smlaier#define IFQ_HANDOFF(ifp, m, err) \ 446130512Smlaier IFQ_HANDOFF_ADJ(ifp, m, 0, err) 447130416Smlaier 448130416Smlaier#define IFQ_DRV_DEQUEUE(ifq, m) \ 449130416Smlaierdo { \ 450130416Smlaier (m) = (ifq)->ifq_drv_head; \ 451130416Smlaier if (m) { \ 452130416Smlaier if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \ 453130416Smlaier (ifq)->ifq_drv_tail = NULL; \ 454130416Smlaier (m)->m_nextpkt = NULL; \ 455130416Smlaier (ifq)->ifq_drv_len--; \ 456130416Smlaier } else { \ 457130416Smlaier IFQ_LOCK(ifq); \ 458130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 459130416Smlaier while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \ 460130416Smlaier struct mbuf *m0; \ 461130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m0); \ 462130416Smlaier if (m0 == NULL) \ 463130416Smlaier break; \ 464130416Smlaier m0->m_nextpkt = NULL; \ 465130416Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 466130416Smlaier (ifq)->ifq_drv_head = m0; \ 467130416Smlaier else \ 468130416Smlaier (ifq)->ifq_drv_tail->m_nextpkt = m0; \ 469130416Smlaier (ifq)->ifq_drv_tail = m0; \ 470130416Smlaier (ifq)->ifq_drv_len++; \ 471130416Smlaier } \ 472130416Smlaier IFQ_UNLOCK(ifq); \ 473130416Smlaier } \ 474130416Smlaier} while (0) 475130416Smlaier 476130416Smlaier#define IFQ_DRV_PREPEND(ifq, m) \ 477130416Smlaierdo { \ 478130416Smlaier (m)->m_nextpkt = (ifq)->ifq_drv_head; \ 479132152Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 480132152Smlaier (ifq)->ifq_drv_tail = (m); \ 481130416Smlaier (ifq)->ifq_drv_head = (m); \ 482130416Smlaier (ifq)->ifq_drv_len++; \ 483130416Smlaier} while (0) 484130416Smlaier 485130416Smlaier#define IFQ_DRV_IS_EMPTY(ifq) \ 486130416Smlaier (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0)) 487130416Smlaier 488130416Smlaier#define IFQ_DRV_PURGE(ifq) \ 489130416Smlaierdo { \ 490132152Smlaier struct mbuf *m, *n = (ifq)->ifq_drv_head; \ 491132152Smlaier while((m = n) != NULL) { \ 492132152Smlaier n = m->m_nextpkt; \ 493130416Smlaier m_freem(m); \ 494130416Smlaier } \ 495130416Smlaier (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \ 496130416Smlaier (ifq)->ifq_drv_len = 0; \ 497130416Smlaier IFQ_PURGE(ifq); \ 498130416Smlaier} while (0) 499130416Smlaier 50049459Sbrian/* 50149459Sbrian * 72 was chosen below because it is the size of a TCP/IP 50249459Sbrian * header (40) + the minimum mss (32). 50349459Sbrian */ 50449459Sbrian#define IF_MINMTU 72 50549459Sbrian#define IF_MAXMTU 65535 50649459Sbrian 50755205Speter#endif /* _KERNEL */ 50821259Swollman 50921259Swollman/* 51021259Swollman * The ifaddr structure contains information about one address 51121259Swollman * of an interface. They are maintained by the different address families, 51221259Swollman * are allocated and attached when an address is set, and are linked 51321259Swollman * together so all addresses for an interface can be located. 514128291Sluigi * 515128291Sluigi * NOTE: a 'struct ifaddr' is always at the beginning of a larger 516128291Sluigi * chunk of malloc'ed memory, where we store the three addresses 517128291Sluigi * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 51821259Swollman */ 51921259Swollmanstruct ifaddr { 52021259Swollman struct sockaddr *ifa_addr; /* address of interface */ 52121259Swollman struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 52221259Swollman#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 52321259Swollman struct sockaddr *ifa_netmask; /* used to determine subnet */ 52467334Sjoe struct if_data if_data; /* not all members are meaningful */ 52521259Swollman struct ifnet *ifa_ifp; /* back-pointer to interface */ 52660938Sjake TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 52721259Swollman void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 52892725Salfred (int, struct rtentry *, struct rt_addrinfo *); 52921259Swollman u_short ifa_flags; /* mostly rt_flags for cloning */ 53047254Spb u_int ifa_refcnt; /* references to this structure */ 53121259Swollman int ifa_metric; /* cost of going out this interface */ 53228845Sjulian int (*ifa_claim_addr) /* check if an addr goes to this if */ 53392725Salfred (struct ifaddr *, struct sockaddr *); 534108033Shsu struct mtx ifa_mtx; 53521259Swollman}; 53621259Swollman#define IFA_ROUTE RTF_UP /* route installed */ 53721259Swollman 53853541Sshin/* for compatibility with other BSDs */ 53953541Sshin#define ifa_list ifa_link 54053541Sshin 541108033Shsu#define IFA_LOCK_INIT(ifa) \ 542108033Shsu mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 543108033Shsu#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 544108033Shsu#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 545108033Shsu#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 546108033Shsu 54721404Swollman/* 54852904Sshin * The prefix structure contains information about one prefix 54952904Sshin * of an interface. They are maintained by the different address families, 550108470Sschweikh * are allocated and attached when a prefix or an address is set, 55153541Sshin * and are linked together so all prefixes for an interface can be located. 55252904Sshin */ 55352904Sshinstruct ifprefix { 55452904Sshin struct sockaddr *ifpr_prefix; /* prefix of interface */ 55552904Sshin struct ifnet *ifpr_ifp; /* back-pointer to interface */ 55660938Sjake TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 55752904Sshin u_char ifpr_plen; /* prefix length in bits */ 55852904Sshin u_char ifpr_type; /* protocol dependent prefix type */ 55952904Sshin}; 56052904Sshin 56152904Sshin/* 56221404Swollman * Multicast address structure. This is analogous to the ifaddr 56321404Swollman * structure except that it keeps track of multicast addresses. 56421404Swollman * Also, the reference count here is a count of requests for this 56521404Swollman * address, not a count of pointers to this structure. 56621404Swollman */ 56721404Swollmanstruct ifmultiaddr { 56872084Sphk TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 56921434Swollman struct sockaddr *ifma_addr; /* address this membership is for */ 57021434Swollman struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 57121434Swollman struct ifnet *ifma_ifp; /* back-pointer to interface */ 57221434Swollman u_int ifma_refcount; /* reference count */ 57321434Swollman void *ifma_protospec; /* protocol-specific state, if any */ 57421404Swollman}; 57521404Swollman 57655205Speter#ifdef _KERNEL 577108036Shsu#define IFAFREE(ifa) \ 578108036Shsu do { \ 579108036Shsu IFA_LOCK(ifa); \ 580108036Shsu KASSERT((ifa)->ifa_refcnt > 0, \ 581108036Shsu ("ifa %p !(ifa_refcnt > 0)", ifa)); \ 582108036Shsu if (--(ifa)->ifa_refcnt == 0) { \ 583108036Shsu IFA_DESTROY(ifa); \ 584108036Shsu free(ifa, M_IFADDR); \ 585108036Shsu } else \ 586108036Shsu IFA_UNLOCK(ifa); \ 58746568Speter } while (0) 58821259Swollman 589108036Shsu#define IFAREF(ifa) \ 590108036Shsu do { \ 591108036Shsu IFA_LOCK(ifa); \ 592108036Shsu ++(ifa)->ifa_refcnt; \ 593108036Shsu IFA_UNLOCK(ifa); \ 594108033Shsu } while (0) 595108033Shsu 596108172Shsuextern struct mtx ifnet_lock; 597108298Shsu#define IFNET_LOCK_INIT() \ 598108298Shsu mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE) 599108172Shsu#define IFNET_WLOCK() mtx_lock(&ifnet_lock) 600108172Shsu#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock) 601108172Shsu#define IFNET_RLOCK() IFNET_WLOCK() 602108172Shsu#define IFNET_RUNLOCK() IFNET_WUNLOCK() 603108172Shsu 60483130Sjlemonstruct ifindex_entry { 60587914Sjlemon struct ifnet *ife_ifnet; 60683130Sjlemon struct ifaddr *ife_ifnet_addr; 607130585Sphk struct cdev *ife_dev; 60883130Sjlemon}; 60983130Sjlemon 61083130Sjlemon#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet 611128315Sluigi/* 612128315Sluigi * Given the index, ifaddr_byindex() returns the one and only 613128315Sluigi * link-level ifaddr for the interface. You are not supposed to use 614128315Sluigi * it to traverse the list of addresses associated to the interface. 615128315Sluigi */ 61683130Sjlemon#define ifaddr_byindex(idx) ifindex_table[(idx)].ife_ifnet_addr 61783130Sjlemon#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev 61883130Sjlemon 61921259Swollmanextern struct ifnethead ifnet; 62083130Sjlemonextern struct ifindex_entry *ifindex_table; 62121259Swollmanextern int ifqmaxlen; 62271791Speterextern struct ifnet *loif; /* first loopback interface */ 62321259Swollmanextern int if_index; 62421259Swollman 62592725Salfredint if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 62692725Salfredint if_allmulti(struct ifnet *, int); 62792725Salfredvoid if_attach(struct ifnet *); 62892725Salfredint if_delmulti(struct ifnet *, struct sockaddr *); 62992725Salfredvoid if_detach(struct ifnet *); 63092725Salfredvoid if_down(struct ifnet *); 631121816Sbrooksvoid if_initname(struct ifnet *, const char *, int); 632138542Ssamvoid if_link_state_change(struct ifnet *, int); 633103900Sbrooksint if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 63492725Salfredint if_setlladdr(struct ifnet *, const u_char *, int); 63592725Salfredvoid if_up(struct ifnet *); 63692725Salfred/*void ifinit(void);*/ /* declared in systm.h for main() */ 63792725Salfredint ifioctl(struct socket *, u_long, caddr_t, struct thread *); 63892725Salfredint ifpromisc(struct ifnet *, int); 63992725Salfredstruct ifnet *ifunit(const char *); 64021259Swollman 64192725Salfredstruct ifaddr *ifa_ifwithaddr(struct sockaddr *); 64292725Salfredstruct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 64392725Salfredstruct ifaddr *ifa_ifwithnet(struct sockaddr *); 64492725Salfredstruct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 64592725Salfredstruct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 64621259Swollman 64792725Salfredstruct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 64892725Salfredint if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 64921434Swollman 65084931Sfjoe#define IF_LLADDR(ifp) \ 65184931Sfjoe LLADDR((struct sockaddr_dl *) ifaddr_byindex((ifp)->if_index)->ifa_addr) 65284931Sfjoe 65387902Sluigi#ifdef DEVICE_POLLING 65487902Sluigienum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER }; 65587902Sluigi 65692725Salfredtypedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 65792725Salfredint ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 65892725Salfredint ether_poll_deregister(struct ifnet *ifp); 65987902Sluigi#endif /* DEVICE_POLLING */ 66087902Sluigi 66155205Speter#endif /* _KERNEL */ 66221259Swollman 66321259Swollman#endif /* !_NET_IF_VAR_H_ */ 664