ifq.h revision 146986
1139823Simp/*- 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 146986 2005-06-05 03:13:13Z thompsa $ 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; 71142215Sglebiusstruct carp_if; 7221259Swollman#endif 7321259Swollman 7421259Swollman#include <sys/queue.h> /* get TAILQ macros */ 7521259Swollman 7669224Sjlemon#ifdef _KERNEL 7769152Sjlemon#include <sys/mbuf.h> 78126264Smlaier#include <sys/eventhandler.h> 7969224Sjlemon#endif /* _KERNEL */ 8074914Sjhb#include <sys/lock.h> /* XXX */ 8174914Sjhb#include <sys/mutex.h> /* XXX */ 8283130Sjlemon#include <sys/event.h> /* XXX */ 83132712Srwatson#include <sys/_task.h> 8469152Sjlemon 85121816Sbrooks#define IF_DUNIT_NONE -1 86121816Sbrooks 87130416Smlaier#include <altq/if_altq.h> 88130416Smlaier 8960938SjakeTAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 9060938SjakeTAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 9160938SjakeTAILQ_HEAD(ifprefixhead, ifprefix); 9272084SphkTAILQ_HEAD(ifmultihead, ifmultiaddr); 9321259Swollman 9421259Swollman/* 9521259Swollman * Structure defining a queue for a network interface. 9621259Swollman */ 9721259Swollmanstruct ifqueue { 9821259Swollman struct mbuf *ifq_head; 9921259Swollman struct mbuf *ifq_tail; 10021259Swollman int ifq_len; 10121259Swollman int ifq_maxlen; 10221259Swollman int ifq_drops; 10369152Sjlemon struct mtx ifq_mtx; 10421259Swollman}; 10521259Swollman 10621259Swollman/* 10721259Swollman * Structure defining a network interface. 10821259Swollman * 10921259Swollman * (Would like to call this struct ``if'', but C isn't PL/1.) 11021259Swollman */ 11184380Smjacob 11284380Smjacob/* 11384380Smjacob * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 11484380Smjacob * one of these structures, typically held within an arpcom structure. 11586797Sluigi * 11686797Sluigi * struct <foo>_softc { 11786797Sluigi * struct arpcom { 11886797Sluigi * struct ifnet ac_if; 11986797Sluigi * ... 12086797Sluigi * } <arpcom> ; 12186797Sluigi * ... 12286797Sluigi * }; 12386797Sluigi * 12486797Sluigi * The assumption is used in a number of places, including many 12586797Sluigi * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 12686797Sluigi * 12786797Sluigi * Unfortunately devices' softc are opaque, so we depend on this layout 12886797Sluigi * to locate the struct ifnet from the softc in the generic code. 12986797Sluigi * 13084380Smjacob */ 13121259Swollmanstruct ifnet { 13221259Swollman void *if_softc; /* pointer to driver state */ 13360938Sjake TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 134121816Sbrooks char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 135121816Sbrooks const char *if_dname; /* driver name */ 136121816Sbrooks int if_dunit; /* unit or IF_DUNIT_NONE */ 13721259Swollman struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 138128291Sluigi /* 139128291Sluigi * if_addrhead is the list of all addresses associated to 140128315Sluigi * an interface. 141128315Sluigi * Some code in the kernel assumes that first element 142128315Sluigi * of the list has type AF_LINK, and contains sockaddr_dl 143128315Sluigi * addresses which store the link-level address and the name 144128291Sluigi * of the interface. 145128315Sluigi * However, access to the AF_LINK address through this 146128315Sluigi * field is deprecated. Use ifaddr_byindex() instead. 147128291Sluigi */ 148133741Sjmg struct knlist if_klist; /* events attached to this if */ 14983130Sjlemon int if_pcount; /* number of promiscuous listeners */ 150142901Sglebius struct carp_if *if_carp; /* carp interface structure */ 15121259Swollman struct bpf_if *if_bpf; /* packet filter structure */ 15221259Swollman u_short if_index; /* numeric abbreviation for this if */ 15321259Swollman short if_timer; /* time 'til if_watchdog called */ 154106931Ssam u_short if_nvlans; /* number of active vlans */ 155102052Ssobomax int if_flags; /* up/down, broadcast, etc. */ 15683624Sjlemon int if_capabilities; /* interface capabilities */ 15783624Sjlemon int if_capenable; /* enabled features */ 15821259Swollman void *if_linkmib; /* link-type-specific MIB data */ 15921259Swollman size_t if_linkmiblen; /* length of above data */ 16021259Swollman struct if_data if_data; 16121404Swollman struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 16221404Swollman int if_amcount; /* number of all-multicast requests */ 16321259Swollman/* procedure handles */ 16421259Swollman int (*if_output) /* output routine (enqueue) */ 16592725Salfred (struct ifnet *, struct mbuf *, struct sockaddr *, 16692725Salfred struct rtentry *); 167106931Ssam void (*if_input) /* input routine (from h/w driver) */ 168106931Ssam (struct ifnet *, struct mbuf *); 16921259Swollman void (*if_start) /* initiate output routine */ 17092725Salfred (struct ifnet *); 17121259Swollman int (*if_ioctl) /* ioctl routine */ 17292725Salfred (struct ifnet *, u_long, caddr_t); 17321259Swollman void (*if_watchdog) /* timer routine */ 17492725Salfred (struct ifnet *); 17521259Swollman void (*if_init) /* Init routine */ 17692725Salfred (void *); 17721404Swollman int (*if_resolvemulti) /* validate/resolve multicast */ 17892725Salfred (struct ifnet *, struct sockaddr **, struct sockaddr *); 179137062Srwatson void *if_spare1; /* spare pointer 1 */ 180137062Srwatson void *if_spare2; /* spare pointer 2 */ 181137062Srwatson void *if_spare3; /* spare pointer 3 */ 182137062Srwatson u_int if_spare_flags1; /* spare flags 1 */ 183137062Srwatson u_int if_spare_flags2; /* spare flags 2 */ 184130416Smlaier struct ifaltq if_snd; /* output queue (includes altq) */ 185123220Simp const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 186127828Sluigi 187146986Sthompsa void *if_bridge; /* bridge glue */ 188146986Sthompsa 189127828Sluigi struct lltable *lltables; /* list of L3-L2 resolution tables */ 190127828Sluigi 191122524Srwatson struct label *if_label; /* interface MAC label */ 192121161Sume 193127828Sluigi /* these are only used by IPv6 */ 194127828Sluigi struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 195121161Sume void *if_afdata[AF_MAX]; 196121470Sume int if_afdata_initialized; 197121470Sume struct mtx if_afdata_mtx; 198132712Srwatson struct task if_starttask; /* task for IFF_NEEDSGIANT */ 199145320Sglebius struct task if_linktask; /* task for link change events */ 20021259Swollman}; 20169152Sjlemon 20292725Salfredtypedef void if_init_f_t(void *); 20321259Swollman 204128376Sluigi/* 205128376Sluigi * XXX These aliases are terribly dangerous because they could apply 206128376Sluigi * to anything. 207128376Sluigi */ 20821259Swollman#define if_mtu if_data.ifi_mtu 20921259Swollman#define if_type if_data.ifi_type 21021259Swollman#define if_physical if_data.ifi_physical 21121259Swollman#define if_addrlen if_data.ifi_addrlen 21221259Swollman#define if_hdrlen if_data.ifi_hdrlen 21321259Swollman#define if_metric if_data.ifi_metric 214128871Sandre#define if_link_state if_data.ifi_link_state 21521259Swollman#define if_baudrate if_data.ifi_baudrate 21658698Sjlemon#define if_hwassist if_data.ifi_hwassist 21721259Swollman#define if_ipackets if_data.ifi_ipackets 21821259Swollman#define if_ierrors if_data.ifi_ierrors 21921259Swollman#define if_opackets if_data.ifi_opackets 22021259Swollman#define if_oerrors if_data.ifi_oerrors 22121259Swollman#define if_collisions if_data.ifi_collisions 22221259Swollman#define if_ibytes if_data.ifi_ibytes 22321259Swollman#define if_obytes if_data.ifi_obytes 22421259Swollman#define if_imcasts if_data.ifi_imcasts 22521259Swollman#define if_omcasts if_data.ifi_omcasts 22621259Swollman#define if_iqdrops if_data.ifi_iqdrops 22721259Swollman#define if_noproto if_data.ifi_noproto 22821259Swollman#define if_lastchange if_data.ifi_lastchange 22921259Swollman#define if_recvquota if_data.ifi_recvquota 23021259Swollman#define if_xmitquota if_data.ifi_xmitquota 231136950Sjmg#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)NULL) 23221259Swollman 23353541Sshin/* for compatibility with other BSDs */ 23453541Sshin#define if_addrlist if_addrhead 23553541Sshin#define if_list if_link 23653541Sshin 23721259Swollman/* 23821259Swollman * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 23921259Swollman * are queues of messages stored on ifqueue structures 24021259Swollman * (defined above). Entries are added to and deleted from these structures 24121259Swollman * by these macros, which should be called with ipl raised to splimp(). 24221259Swollman */ 24372200Sbmilekic#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 24472200Sbmilekic#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 245130416Smlaier#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED) 24669152Sjlemon#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 24769152Sjlemon#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 24869152Sjlemon#define _IF_QLEN(ifq) ((ifq)->ifq_len) 24921259Swollman 25069152Sjlemon#define _IF_ENQUEUE(ifq, m) do { \ 25169152Sjlemon (m)->m_nextpkt = NULL; \ 25269152Sjlemon if ((ifq)->ifq_tail == NULL) \ 25369152Sjlemon (ifq)->ifq_head = m; \ 25469152Sjlemon else \ 25569152Sjlemon (ifq)->ifq_tail->m_nextpkt = m; \ 25669152Sjlemon (ifq)->ifq_tail = m; \ 25769152Sjlemon (ifq)->ifq_len++; \ 25869152Sjlemon} while (0) 25969152Sjlemon 26069152Sjlemon#define IF_ENQUEUE(ifq, m) do { \ 26169152Sjlemon IF_LOCK(ifq); \ 26269152Sjlemon _IF_ENQUEUE(ifq, m); \ 26369152Sjlemon IF_UNLOCK(ifq); \ 26469152Sjlemon} while (0) 26569152Sjlemon 26669152Sjlemon#define _IF_PREPEND(ifq, m) do { \ 26769152Sjlemon (m)->m_nextpkt = (ifq)->ifq_head; \ 26869152Sjlemon if ((ifq)->ifq_tail == NULL) \ 26969152Sjlemon (ifq)->ifq_tail = (m); \ 27069152Sjlemon (ifq)->ifq_head = (m); \ 27169152Sjlemon (ifq)->ifq_len++; \ 27269152Sjlemon} while (0) 27369152Sjlemon 27469152Sjlemon#define IF_PREPEND(ifq, m) do { \ 27569152Sjlemon IF_LOCK(ifq); \ 27669152Sjlemon _IF_PREPEND(ifq, m); \ 27769152Sjlemon IF_UNLOCK(ifq); \ 27869152Sjlemon} while (0) 27969152Sjlemon 28069152Sjlemon#define _IF_DEQUEUE(ifq, m) do { \ 28169152Sjlemon (m) = (ifq)->ifq_head; \ 28269152Sjlemon if (m) { \ 283136950Sjmg if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ 28469152Sjlemon (ifq)->ifq_tail = NULL; \ 28569152Sjlemon (m)->m_nextpkt = NULL; \ 28669152Sjlemon (ifq)->ifq_len--; \ 28769152Sjlemon } \ 28869152Sjlemon} while (0) 28969152Sjlemon 29069152Sjlemon#define IF_DEQUEUE(ifq, m) do { \ 29169152Sjlemon IF_LOCK(ifq); \ 29269152Sjlemon _IF_DEQUEUE(ifq, m); \ 29369152Sjlemon IF_UNLOCK(ifq); \ 29469152Sjlemon} while (0) 29569152Sjlemon 296130416Smlaier#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 297130416Smlaier#define IF_POLL(ifq, m) _IF_POLL(ifq, m) 298130416Smlaier 299130416Smlaier#define _IF_DRAIN(ifq) do { \ 30069152Sjlemon struct mbuf *m; \ 30169152Sjlemon for (;;) { \ 30269152Sjlemon _IF_DEQUEUE(ifq, m); \ 30369152Sjlemon if (m == NULL) \ 30469152Sjlemon break; \ 30569152Sjlemon m_freem(m); \ 30669152Sjlemon } \ 30769152Sjlemon} while (0) 30869152Sjlemon 309130416Smlaier#define IF_DRAIN(ifq) do { \ 310130416Smlaier IF_LOCK(ifq); \ 311130416Smlaier _IF_DRAIN(ifq); \ 312130416Smlaier IF_UNLOCK(ifq); \ 313130416Smlaier} while(0) 314130416Smlaier 31555205Speter#ifdef _KERNEL 316126264Smlaier/* interface address change event */ 317126264Smlaiertypedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 318126264SmlaierEVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 319126264Smlaier/* new interface arrival event */ 320126264Smlaiertypedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 321126264SmlaierEVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 322126264Smlaier/* interface departure event */ 323126264Smlaiertypedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 324126264SmlaierEVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 325126264Smlaier 326121470Sume#define IF_AFDATA_LOCK_INIT(ifp) \ 327121470Sume mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 328121470Sume#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 329121470Sume#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 330121470Sume#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 331121470Sume#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 332121470Sume 333136704Srwatson#define IFF_LOCKGIANT(ifp) do { \ 334136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 335136704Srwatson mtx_lock(&Giant); \ 336136704Srwatson} while (0) 337136704Srwatson 338136704Srwatson#define IFF_UNLOCKGIANT(ifp) do { \ 339136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 340136704Srwatson mtx_unlock(&Giant); \ 341136704Srwatson} while (0) 342136704Srwatson 343137065Srwatsonint if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, 344137065Srwatson int adjust); 345130416Smlaier#define IF_HANDOFF(ifq, m, ifp) \ 346130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, 0) 347130416Smlaier#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \ 348130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, adj) 34921259Swollman 350132712Srwatsonvoid if_start(struct ifnet *); 351132712Srwatson 352130416Smlaier#define IFQ_ENQUEUE(ifq, m, err) \ 353130416Smlaierdo { \ 354130416Smlaier IF_LOCK(ifq); \ 355130416Smlaier if (ALTQ_IS_ENABLED(ifq)) \ 356130416Smlaier ALTQ_ENQUEUE(ifq, m, NULL, err); \ 357130416Smlaier else { \ 358130416Smlaier if (_IF_QFULL(ifq)) { \ 359130416Smlaier m_freem(m); \ 360130416Smlaier (err) = ENOBUFS; \ 361130416Smlaier } else { \ 362130416Smlaier _IF_ENQUEUE(ifq, m); \ 363130416Smlaier (err) = 0; \ 364130416Smlaier } \ 365130416Smlaier } \ 366130416Smlaier if (err) \ 367130416Smlaier (ifq)->ifq_drops++; \ 368130416Smlaier IF_UNLOCK(ifq); \ 369130416Smlaier} while (0) 37021259Swollman 371130416Smlaier#define IFQ_DEQUEUE_NOLOCK(ifq, m) \ 372130416Smlaierdo { \ 373130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 374130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \ 375130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 376130416Smlaier ALTQ_DEQUEUE(ifq, m); \ 377130416Smlaier else \ 378130416Smlaier _IF_DEQUEUE(ifq, m); \ 379130416Smlaier} while (0) 380130416Smlaier 381130416Smlaier#define IFQ_DEQUEUE(ifq, m) \ 382130416Smlaierdo { \ 383130416Smlaier IF_LOCK(ifq); \ 384130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 385130416Smlaier IF_UNLOCK(ifq); \ 386130416Smlaier} while (0) 387130416Smlaier 388130416Smlaier#define IFQ_POLL_NOLOCK(ifq, m) \ 389130416Smlaierdo { \ 390130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 391130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \ 392130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 393130416Smlaier ALTQ_POLL(ifq, m); \ 394130416Smlaier else \ 395130416Smlaier _IF_POLL(ifq, m); \ 396130416Smlaier} while (0) 397130416Smlaier 398130416Smlaier#define IFQ_POLL(ifq, m) \ 399130416Smlaierdo { \ 400130416Smlaier IF_LOCK(ifq); \ 401130416Smlaier IFQ_POLL_NOLOCK(ifq, m); \ 402130416Smlaier IF_UNLOCK(ifq); \ 403130416Smlaier} while (0) 404130416Smlaier 405130416Smlaier#define IFQ_PURGE_NOLOCK(ifq) \ 406130416Smlaierdo { \ 407130416Smlaier if (ALTQ_IS_ENABLED(ifq)) { \ 408130416Smlaier ALTQ_PURGE(ifq); \ 409130416Smlaier } else \ 410130416Smlaier _IF_DRAIN(ifq); \ 411130416Smlaier} while (0) 412130416Smlaier 413130416Smlaier#define IFQ_PURGE(ifq) \ 414130416Smlaierdo { \ 415130416Smlaier IF_LOCK(ifq); \ 416130416Smlaier IFQ_PURGE_NOLOCK(ifq); \ 417130416Smlaier IF_UNLOCK(ifq); \ 418130416Smlaier} while (0) 419130416Smlaier 420130416Smlaier#define IFQ_SET_READY(ifq) \ 421130416Smlaier do { ((ifq)->altq_flags |= ALTQF_READY); } while (0) 422130416Smlaier 423130416Smlaier#define IFQ_LOCK(ifq) IF_LOCK(ifq) 424130416Smlaier#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq) 425130416Smlaier#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq) 426130416Smlaier#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 427130416Smlaier#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 428130416Smlaier#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 429130416Smlaier#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 430130416Smlaier#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 431130416Smlaier 432130416Smlaier#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \ 433130416Smlaierdo { \ 434130416Smlaier int len; \ 435130416Smlaier short mflags; \ 436130416Smlaier \ 437130416Smlaier len = (m)->m_pkthdr.len; \ 438130416Smlaier mflags = (m)->m_flags; \ 439130416Smlaier IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \ 440130416Smlaier if ((err) == 0) { \ 441130416Smlaier (ifp)->if_obytes += len + (adj); \ 442130416Smlaier if (mflags & M_MCAST) \ 443130416Smlaier (ifp)->if_omcasts++; \ 444130416Smlaier if (((ifp)->if_flags & IFF_OACTIVE) == 0) \ 445132712Srwatson if_start(ifp); \ 446130416Smlaier } \ 447130416Smlaier} while (0) 448130416Smlaier 449130416Smlaier#define IFQ_HANDOFF(ifp, m, err) \ 450130512Smlaier IFQ_HANDOFF_ADJ(ifp, m, 0, err) 451130416Smlaier 452130416Smlaier#define IFQ_DRV_DEQUEUE(ifq, m) \ 453130416Smlaierdo { \ 454130416Smlaier (m) = (ifq)->ifq_drv_head; \ 455130416Smlaier if (m) { \ 456130416Smlaier if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \ 457130416Smlaier (ifq)->ifq_drv_tail = NULL; \ 458130416Smlaier (m)->m_nextpkt = NULL; \ 459130416Smlaier (ifq)->ifq_drv_len--; \ 460130416Smlaier } else { \ 461130416Smlaier IFQ_LOCK(ifq); \ 462130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 463130416Smlaier while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \ 464130416Smlaier struct mbuf *m0; \ 465130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m0); \ 466130416Smlaier if (m0 == NULL) \ 467130416Smlaier break; \ 468130416Smlaier m0->m_nextpkt = NULL; \ 469130416Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 470130416Smlaier (ifq)->ifq_drv_head = m0; \ 471130416Smlaier else \ 472130416Smlaier (ifq)->ifq_drv_tail->m_nextpkt = m0; \ 473130416Smlaier (ifq)->ifq_drv_tail = m0; \ 474130416Smlaier (ifq)->ifq_drv_len++; \ 475130416Smlaier } \ 476130416Smlaier IFQ_UNLOCK(ifq); \ 477130416Smlaier } \ 478130416Smlaier} while (0) 479130416Smlaier 480130416Smlaier#define IFQ_DRV_PREPEND(ifq, m) \ 481130416Smlaierdo { \ 482130416Smlaier (m)->m_nextpkt = (ifq)->ifq_drv_head; \ 483132152Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 484132152Smlaier (ifq)->ifq_drv_tail = (m); \ 485130416Smlaier (ifq)->ifq_drv_head = (m); \ 486130416Smlaier (ifq)->ifq_drv_len++; \ 487130416Smlaier} while (0) 488130416Smlaier 489130416Smlaier#define IFQ_DRV_IS_EMPTY(ifq) \ 490130416Smlaier (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0)) 491130416Smlaier 492130416Smlaier#define IFQ_DRV_PURGE(ifq) \ 493130416Smlaierdo { \ 494132152Smlaier struct mbuf *m, *n = (ifq)->ifq_drv_head; \ 495132152Smlaier while((m = n) != NULL) { \ 496132152Smlaier n = m->m_nextpkt; \ 497130416Smlaier m_freem(m); \ 498130416Smlaier } \ 499130416Smlaier (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \ 500130416Smlaier (ifq)->ifq_drv_len = 0; \ 501130416Smlaier IFQ_PURGE(ifq); \ 502130416Smlaier} while (0) 503130416Smlaier 50449459Sbrian/* 50549459Sbrian * 72 was chosen below because it is the size of a TCP/IP 50649459Sbrian * header (40) + the minimum mss (32). 50749459Sbrian */ 50849459Sbrian#define IF_MINMTU 72 50949459Sbrian#define IF_MAXMTU 65535 51049459Sbrian 51155205Speter#endif /* _KERNEL */ 51221259Swollman 51321259Swollman/* 51421259Swollman * The ifaddr structure contains information about one address 51521259Swollman * of an interface. They are maintained by the different address families, 51621259Swollman * are allocated and attached when an address is set, and are linked 51721259Swollman * together so all addresses for an interface can be located. 518128291Sluigi * 519128291Sluigi * NOTE: a 'struct ifaddr' is always at the beginning of a larger 520128291Sluigi * chunk of malloc'ed memory, where we store the three addresses 521128291Sluigi * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 52221259Swollman */ 52321259Swollmanstruct ifaddr { 52421259Swollman struct sockaddr *ifa_addr; /* address of interface */ 52521259Swollman struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 52621259Swollman#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 52721259Swollman struct sockaddr *ifa_netmask; /* used to determine subnet */ 52867334Sjoe struct if_data if_data; /* not all members are meaningful */ 52921259Swollman struct ifnet *ifa_ifp; /* back-pointer to interface */ 53060938Sjake TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 53121259Swollman void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 53292725Salfred (int, struct rtentry *, struct rt_addrinfo *); 53321259Swollman u_short ifa_flags; /* mostly rt_flags for cloning */ 53447254Spb u_int ifa_refcnt; /* references to this structure */ 53521259Swollman int ifa_metric; /* cost of going out this interface */ 53628845Sjulian int (*ifa_claim_addr) /* check if an addr goes to this if */ 53792725Salfred (struct ifaddr *, struct sockaddr *); 538108033Shsu struct mtx ifa_mtx; 53921259Swollman}; 54021259Swollman#define IFA_ROUTE RTF_UP /* route installed */ 54121259Swollman 54253541Sshin/* for compatibility with other BSDs */ 54353541Sshin#define ifa_list ifa_link 54453541Sshin 545108033Shsu#define IFA_LOCK_INIT(ifa) \ 546108033Shsu mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 547108033Shsu#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 548108033Shsu#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 549108033Shsu#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 550108033Shsu 55121404Swollman/* 55252904Sshin * The prefix structure contains information about one prefix 55352904Sshin * of an interface. They are maintained by the different address families, 554108470Sschweikh * are allocated and attached when a prefix or an address is set, 55553541Sshin * and are linked together so all prefixes for an interface can be located. 55652904Sshin */ 55752904Sshinstruct ifprefix { 55852904Sshin struct sockaddr *ifpr_prefix; /* prefix of interface */ 55952904Sshin struct ifnet *ifpr_ifp; /* back-pointer to interface */ 56060938Sjake TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 56152904Sshin u_char ifpr_plen; /* prefix length in bits */ 56252904Sshin u_char ifpr_type; /* protocol dependent prefix type */ 56352904Sshin}; 56452904Sshin 56552904Sshin/* 56621404Swollman * Multicast address structure. This is analogous to the ifaddr 56721404Swollman * structure except that it keeps track of multicast addresses. 56821404Swollman * Also, the reference count here is a count of requests for this 56921404Swollman * address, not a count of pointers to this structure. 57021404Swollman */ 57121404Swollmanstruct ifmultiaddr { 57272084Sphk TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 57321434Swollman struct sockaddr *ifma_addr; /* address this membership is for */ 57421434Swollman struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 57521434Swollman struct ifnet *ifma_ifp; /* back-pointer to interface */ 57621434Swollman u_int ifma_refcount; /* reference count */ 57721434Swollman void *ifma_protospec; /* protocol-specific state, if any */ 57821404Swollman}; 57921404Swollman 58055205Speter#ifdef _KERNEL 581108036Shsu#define IFAFREE(ifa) \ 582108036Shsu do { \ 583108036Shsu IFA_LOCK(ifa); \ 584108036Shsu KASSERT((ifa)->ifa_refcnt > 0, \ 585108036Shsu ("ifa %p !(ifa_refcnt > 0)", ifa)); \ 586108036Shsu if (--(ifa)->ifa_refcnt == 0) { \ 587108036Shsu IFA_DESTROY(ifa); \ 588108036Shsu free(ifa, M_IFADDR); \ 589108036Shsu } else \ 590108036Shsu IFA_UNLOCK(ifa); \ 59146568Speter } while (0) 59221259Swollman 593108036Shsu#define IFAREF(ifa) \ 594108036Shsu do { \ 595108036Shsu IFA_LOCK(ifa); \ 596108036Shsu ++(ifa)->ifa_refcnt; \ 597108036Shsu IFA_UNLOCK(ifa); \ 598108033Shsu } while (0) 599108033Shsu 600108172Shsuextern struct mtx ifnet_lock; 601108298Shsu#define IFNET_LOCK_INIT() \ 602108298Shsu mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE) 603108172Shsu#define IFNET_WLOCK() mtx_lock(&ifnet_lock) 604108172Shsu#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock) 605108172Shsu#define IFNET_RLOCK() IFNET_WLOCK() 606108172Shsu#define IFNET_RUNLOCK() IFNET_WUNLOCK() 607108172Shsu 60883130Sjlemonstruct ifindex_entry { 60987914Sjlemon struct ifnet *ife_ifnet; 61083130Sjlemon struct ifaddr *ife_ifnet_addr; 611130585Sphk struct cdev *ife_dev; 61283130Sjlemon}; 61383130Sjlemon 61483130Sjlemon#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet 615128315Sluigi/* 616128315Sluigi * Given the index, ifaddr_byindex() returns the one and only 617128315Sluigi * link-level ifaddr for the interface. You are not supposed to use 618128315Sluigi * it to traverse the list of addresses associated to the interface. 619128315Sluigi */ 62083130Sjlemon#define ifaddr_byindex(idx) ifindex_table[(idx)].ife_ifnet_addr 62183130Sjlemon#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev 62283130Sjlemon 62321259Swollmanextern struct ifnethead ifnet; 62483130Sjlemonextern struct ifindex_entry *ifindex_table; 62521259Swollmanextern int ifqmaxlen; 62671791Speterextern struct ifnet *loif; /* first loopback interface */ 62721259Swollmanextern int if_index; 62821259Swollman 62992725Salfredint if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 63092725Salfredint if_allmulti(struct ifnet *, int); 63192725Salfredvoid if_attach(struct ifnet *); 63292725Salfredint if_delmulti(struct ifnet *, struct sockaddr *); 63392725Salfredvoid if_detach(struct ifnet *); 634146620Speadarvoid if_purgeaddrs(struct ifnet *); 63592725Salfredvoid if_down(struct ifnet *); 636121816Sbrooksvoid if_initname(struct ifnet *, const char *, int); 637138542Ssamvoid if_link_state_change(struct ifnet *, int); 638103900Sbrooksint if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 63992725Salfredint if_setlladdr(struct ifnet *, const u_char *, int); 64092725Salfredvoid if_up(struct ifnet *); 64192725Salfred/*void ifinit(void);*/ /* declared in systm.h for main() */ 64292725Salfredint ifioctl(struct socket *, u_long, caddr_t, struct thread *); 64392725Salfredint ifpromisc(struct ifnet *, int); 64492725Salfredstruct ifnet *ifunit(const char *); 64521259Swollman 64692725Salfredstruct ifaddr *ifa_ifwithaddr(struct sockaddr *); 64792725Salfredstruct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 64892725Salfredstruct ifaddr *ifa_ifwithnet(struct sockaddr *); 64992725Salfredstruct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 65092725Salfredstruct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 65121259Swollman 65292725Salfredstruct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 65392725Salfredint if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 65421434Swollman 65584931Sfjoe#define IF_LLADDR(ifp) \ 65684931Sfjoe LLADDR((struct sockaddr_dl *) ifaddr_byindex((ifp)->if_index)->ifa_addr) 65784931Sfjoe 65887902Sluigi#ifdef DEVICE_POLLING 65987902Sluigienum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER }; 66087902Sluigi 66192725Salfredtypedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 66292725Salfredint ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 66392725Salfredint ether_poll_deregister(struct ifnet *ifp); 66487902Sluigi#endif /* DEVICE_POLLING */ 66587902Sluigi 66655205Speter#endif /* _KERNEL */ 66721259Swollman 66821259Swollman#endif /* !_NET_IF_VAR_H_ */ 669