ifq.h revision 147256
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 147256 2005-06-10 16:49:24Z brooks $ 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 11221259Swollmanstruct ifnet { 11321259Swollman void *if_softc; /* pointer to driver state */ 114147256Sbrooks void *if_l2com; /* pointer to protocol bits */ 11560938Sjake TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 116121816Sbrooks char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 117121816Sbrooks const char *if_dname; /* driver name */ 118121816Sbrooks int if_dunit; /* unit or IF_DUNIT_NONE */ 11921259Swollman struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 120128291Sluigi /* 121128291Sluigi * if_addrhead is the list of all addresses associated to 122128315Sluigi * an interface. 123128315Sluigi * Some code in the kernel assumes that first element 124128315Sluigi * of the list has type AF_LINK, and contains sockaddr_dl 125128315Sluigi * addresses which store the link-level address and the name 126128291Sluigi * of the interface. 127128315Sluigi * However, access to the AF_LINK address through this 128128315Sluigi * field is deprecated. Use ifaddr_byindex() instead. 129128291Sluigi */ 130133741Sjmg struct knlist if_klist; /* events attached to this if */ 13183130Sjlemon int if_pcount; /* number of promiscuous listeners */ 132142901Sglebius struct carp_if *if_carp; /* carp interface structure */ 13321259Swollman struct bpf_if *if_bpf; /* packet filter structure */ 13421259Swollman u_short if_index; /* numeric abbreviation for this if */ 13521259Swollman short if_timer; /* time 'til if_watchdog called */ 136106931Ssam u_short if_nvlans; /* number of active vlans */ 137102052Ssobomax int if_flags; /* up/down, broadcast, etc. */ 13883624Sjlemon int if_capabilities; /* interface capabilities */ 13983624Sjlemon int if_capenable; /* enabled features */ 14021259Swollman void *if_linkmib; /* link-type-specific MIB data */ 14121259Swollman size_t if_linkmiblen; /* length of above data */ 14221259Swollman struct if_data if_data; 14321404Swollman struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 14421404Swollman int if_amcount; /* number of all-multicast requests */ 14521259Swollman/* procedure handles */ 14621259Swollman int (*if_output) /* output routine (enqueue) */ 14792725Salfred (struct ifnet *, struct mbuf *, struct sockaddr *, 14892725Salfred struct rtentry *); 149106931Ssam void (*if_input) /* input routine (from h/w driver) */ 150106931Ssam (struct ifnet *, struct mbuf *); 15121259Swollman void (*if_start) /* initiate output routine */ 15292725Salfred (struct ifnet *); 15321259Swollman int (*if_ioctl) /* ioctl routine */ 15492725Salfred (struct ifnet *, u_long, caddr_t); 15521259Swollman void (*if_watchdog) /* timer routine */ 15692725Salfred (struct ifnet *); 15721259Swollman void (*if_init) /* Init routine */ 15892725Salfred (void *); 15921404Swollman int (*if_resolvemulti) /* validate/resolve multicast */ 16092725Salfred (struct ifnet *, struct sockaddr **, struct sockaddr *); 161137062Srwatson void *if_spare1; /* spare pointer 1 */ 162137062Srwatson void *if_spare2; /* spare pointer 2 */ 163137062Srwatson void *if_spare3; /* spare pointer 3 */ 164137062Srwatson u_int if_spare_flags1; /* spare flags 1 */ 165137062Srwatson u_int if_spare_flags2; /* spare flags 2 */ 166130416Smlaier struct ifaltq if_snd; /* output queue (includes altq) */ 167123220Simp const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 168127828Sluigi 169146986Sthompsa void *if_bridge; /* bridge glue */ 170146986Sthompsa 171127828Sluigi struct lltable *lltables; /* list of L3-L2 resolution tables */ 172127828Sluigi 173122524Srwatson struct label *if_label; /* interface MAC label */ 174121161Sume 175127828Sluigi /* these are only used by IPv6 */ 176127828Sluigi struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 177121161Sume void *if_afdata[AF_MAX]; 178121470Sume int if_afdata_initialized; 179121470Sume struct mtx if_afdata_mtx; 180132712Srwatson struct task if_starttask; /* task for IFF_NEEDSGIANT */ 181145320Sglebius struct task if_linktask; /* task for link change events */ 18221259Swollman}; 18369152Sjlemon 18492725Salfredtypedef void if_init_f_t(void *); 18521259Swollman 186128376Sluigi/* 187128376Sluigi * XXX These aliases are terribly dangerous because they could apply 188128376Sluigi * to anything. 189128376Sluigi */ 19021259Swollman#define if_mtu if_data.ifi_mtu 19121259Swollman#define if_type if_data.ifi_type 19221259Swollman#define if_physical if_data.ifi_physical 19321259Swollman#define if_addrlen if_data.ifi_addrlen 19421259Swollman#define if_hdrlen if_data.ifi_hdrlen 19521259Swollman#define if_metric if_data.ifi_metric 196128871Sandre#define if_link_state if_data.ifi_link_state 19721259Swollman#define if_baudrate if_data.ifi_baudrate 19858698Sjlemon#define if_hwassist if_data.ifi_hwassist 19921259Swollman#define if_ipackets if_data.ifi_ipackets 20021259Swollman#define if_ierrors if_data.ifi_ierrors 20121259Swollman#define if_opackets if_data.ifi_opackets 20221259Swollman#define if_oerrors if_data.ifi_oerrors 20321259Swollman#define if_collisions if_data.ifi_collisions 20421259Swollman#define if_ibytes if_data.ifi_ibytes 20521259Swollman#define if_obytes if_data.ifi_obytes 20621259Swollman#define if_imcasts if_data.ifi_imcasts 20721259Swollman#define if_omcasts if_data.ifi_omcasts 20821259Swollman#define if_iqdrops if_data.ifi_iqdrops 20921259Swollman#define if_noproto if_data.ifi_noproto 21021259Swollman#define if_lastchange if_data.ifi_lastchange 21121259Swollman#define if_recvquota if_data.ifi_recvquota 21221259Swollman#define if_xmitquota if_data.ifi_xmitquota 213136950Sjmg#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)NULL) 21421259Swollman 21553541Sshin/* for compatibility with other BSDs */ 21653541Sshin#define if_addrlist if_addrhead 21753541Sshin#define if_list if_link 21853541Sshin 21921259Swollman/* 22021259Swollman * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 22121259Swollman * are queues of messages stored on ifqueue structures 22221259Swollman * (defined above). Entries are added to and deleted from these structures 22321259Swollman * by these macros, which should be called with ipl raised to splimp(). 22421259Swollman */ 22572200Sbmilekic#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 22672200Sbmilekic#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 227130416Smlaier#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED) 22869152Sjlemon#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 22969152Sjlemon#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 23069152Sjlemon#define _IF_QLEN(ifq) ((ifq)->ifq_len) 23121259Swollman 23269152Sjlemon#define _IF_ENQUEUE(ifq, m) do { \ 23369152Sjlemon (m)->m_nextpkt = NULL; \ 23469152Sjlemon if ((ifq)->ifq_tail == NULL) \ 23569152Sjlemon (ifq)->ifq_head = m; \ 23669152Sjlemon else \ 23769152Sjlemon (ifq)->ifq_tail->m_nextpkt = m; \ 23869152Sjlemon (ifq)->ifq_tail = m; \ 23969152Sjlemon (ifq)->ifq_len++; \ 24069152Sjlemon} while (0) 24169152Sjlemon 24269152Sjlemon#define IF_ENQUEUE(ifq, m) do { \ 24369152Sjlemon IF_LOCK(ifq); \ 24469152Sjlemon _IF_ENQUEUE(ifq, m); \ 24569152Sjlemon IF_UNLOCK(ifq); \ 24669152Sjlemon} while (0) 24769152Sjlemon 24869152Sjlemon#define _IF_PREPEND(ifq, m) do { \ 24969152Sjlemon (m)->m_nextpkt = (ifq)->ifq_head; \ 25069152Sjlemon if ((ifq)->ifq_tail == NULL) \ 25169152Sjlemon (ifq)->ifq_tail = (m); \ 25269152Sjlemon (ifq)->ifq_head = (m); \ 25369152Sjlemon (ifq)->ifq_len++; \ 25469152Sjlemon} while (0) 25569152Sjlemon 25669152Sjlemon#define IF_PREPEND(ifq, m) do { \ 25769152Sjlemon IF_LOCK(ifq); \ 25869152Sjlemon _IF_PREPEND(ifq, m); \ 25969152Sjlemon IF_UNLOCK(ifq); \ 26069152Sjlemon} while (0) 26169152Sjlemon 26269152Sjlemon#define _IF_DEQUEUE(ifq, m) do { \ 26369152Sjlemon (m) = (ifq)->ifq_head; \ 26469152Sjlemon if (m) { \ 265136950Sjmg if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ 26669152Sjlemon (ifq)->ifq_tail = NULL; \ 26769152Sjlemon (m)->m_nextpkt = NULL; \ 26869152Sjlemon (ifq)->ifq_len--; \ 26969152Sjlemon } \ 27069152Sjlemon} while (0) 27169152Sjlemon 27269152Sjlemon#define IF_DEQUEUE(ifq, m) do { \ 27369152Sjlemon IF_LOCK(ifq); \ 27469152Sjlemon _IF_DEQUEUE(ifq, m); \ 27569152Sjlemon IF_UNLOCK(ifq); \ 27669152Sjlemon} while (0) 27769152Sjlemon 278130416Smlaier#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 279130416Smlaier#define IF_POLL(ifq, m) _IF_POLL(ifq, m) 280130416Smlaier 281130416Smlaier#define _IF_DRAIN(ifq) do { \ 28269152Sjlemon struct mbuf *m; \ 28369152Sjlemon for (;;) { \ 28469152Sjlemon _IF_DEQUEUE(ifq, m); \ 28569152Sjlemon if (m == NULL) \ 28669152Sjlemon break; \ 28769152Sjlemon m_freem(m); \ 28869152Sjlemon } \ 28969152Sjlemon} while (0) 29069152Sjlemon 291130416Smlaier#define IF_DRAIN(ifq) do { \ 292130416Smlaier IF_LOCK(ifq); \ 293130416Smlaier _IF_DRAIN(ifq); \ 294130416Smlaier IF_UNLOCK(ifq); \ 295130416Smlaier} while(0) 296130416Smlaier 29755205Speter#ifdef _KERNEL 298126264Smlaier/* interface address change event */ 299126264Smlaiertypedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 300126264SmlaierEVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 301126264Smlaier/* new interface arrival event */ 302126264Smlaiertypedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 303126264SmlaierEVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 304126264Smlaier/* interface departure event */ 305126264Smlaiertypedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 306126264SmlaierEVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 307126264Smlaier 308121470Sume#define IF_AFDATA_LOCK_INIT(ifp) \ 309121470Sume mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 310121470Sume#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 311121470Sume#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 312121470Sume#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 313121470Sume#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 314121470Sume 315136704Srwatson#define IFF_LOCKGIANT(ifp) do { \ 316136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 317136704Srwatson mtx_lock(&Giant); \ 318136704Srwatson} while (0) 319136704Srwatson 320136704Srwatson#define IFF_UNLOCKGIANT(ifp) do { \ 321136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 322136704Srwatson mtx_unlock(&Giant); \ 323136704Srwatson} while (0) 324136704Srwatson 325137065Srwatsonint if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, 326137065Srwatson int adjust); 327130416Smlaier#define IF_HANDOFF(ifq, m, ifp) \ 328130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, 0) 329130416Smlaier#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \ 330130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, adj) 33121259Swollman 332132712Srwatsonvoid if_start(struct ifnet *); 333132712Srwatson 334130416Smlaier#define IFQ_ENQUEUE(ifq, m, err) \ 335130416Smlaierdo { \ 336130416Smlaier IF_LOCK(ifq); \ 337130416Smlaier if (ALTQ_IS_ENABLED(ifq)) \ 338130416Smlaier ALTQ_ENQUEUE(ifq, m, NULL, err); \ 339130416Smlaier else { \ 340130416Smlaier if (_IF_QFULL(ifq)) { \ 341130416Smlaier m_freem(m); \ 342130416Smlaier (err) = ENOBUFS; \ 343130416Smlaier } else { \ 344130416Smlaier _IF_ENQUEUE(ifq, m); \ 345130416Smlaier (err) = 0; \ 346130416Smlaier } \ 347130416Smlaier } \ 348130416Smlaier if (err) \ 349130416Smlaier (ifq)->ifq_drops++; \ 350130416Smlaier IF_UNLOCK(ifq); \ 351130416Smlaier} while (0) 35221259Swollman 353130416Smlaier#define IFQ_DEQUEUE_NOLOCK(ifq, m) \ 354130416Smlaierdo { \ 355130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 356130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \ 357130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 358130416Smlaier ALTQ_DEQUEUE(ifq, m); \ 359130416Smlaier else \ 360130416Smlaier _IF_DEQUEUE(ifq, m); \ 361130416Smlaier} while (0) 362130416Smlaier 363130416Smlaier#define IFQ_DEQUEUE(ifq, m) \ 364130416Smlaierdo { \ 365130416Smlaier IF_LOCK(ifq); \ 366130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 367130416Smlaier IF_UNLOCK(ifq); \ 368130416Smlaier} while (0) 369130416Smlaier 370130416Smlaier#define IFQ_POLL_NOLOCK(ifq, m) \ 371130416Smlaierdo { \ 372130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 373130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \ 374130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 375130416Smlaier ALTQ_POLL(ifq, m); \ 376130416Smlaier else \ 377130416Smlaier _IF_POLL(ifq, m); \ 378130416Smlaier} while (0) 379130416Smlaier 380130416Smlaier#define IFQ_POLL(ifq, m) \ 381130416Smlaierdo { \ 382130416Smlaier IF_LOCK(ifq); \ 383130416Smlaier IFQ_POLL_NOLOCK(ifq, m); \ 384130416Smlaier IF_UNLOCK(ifq); \ 385130416Smlaier} while (0) 386130416Smlaier 387130416Smlaier#define IFQ_PURGE_NOLOCK(ifq) \ 388130416Smlaierdo { \ 389130416Smlaier if (ALTQ_IS_ENABLED(ifq)) { \ 390130416Smlaier ALTQ_PURGE(ifq); \ 391130416Smlaier } else \ 392130416Smlaier _IF_DRAIN(ifq); \ 393130416Smlaier} while (0) 394130416Smlaier 395130416Smlaier#define IFQ_PURGE(ifq) \ 396130416Smlaierdo { \ 397130416Smlaier IF_LOCK(ifq); \ 398130416Smlaier IFQ_PURGE_NOLOCK(ifq); \ 399130416Smlaier IF_UNLOCK(ifq); \ 400130416Smlaier} while (0) 401130416Smlaier 402130416Smlaier#define IFQ_SET_READY(ifq) \ 403130416Smlaier do { ((ifq)->altq_flags |= ALTQF_READY); } while (0) 404130416Smlaier 405130416Smlaier#define IFQ_LOCK(ifq) IF_LOCK(ifq) 406130416Smlaier#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq) 407130416Smlaier#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq) 408130416Smlaier#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 409130416Smlaier#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 410130416Smlaier#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 411130416Smlaier#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 412130416Smlaier#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 413130416Smlaier 414130416Smlaier#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \ 415130416Smlaierdo { \ 416130416Smlaier int len; \ 417130416Smlaier short mflags; \ 418130416Smlaier \ 419130416Smlaier len = (m)->m_pkthdr.len; \ 420130416Smlaier mflags = (m)->m_flags; \ 421130416Smlaier IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \ 422130416Smlaier if ((err) == 0) { \ 423130416Smlaier (ifp)->if_obytes += len + (adj); \ 424130416Smlaier if (mflags & M_MCAST) \ 425130416Smlaier (ifp)->if_omcasts++; \ 426130416Smlaier if (((ifp)->if_flags & IFF_OACTIVE) == 0) \ 427132712Srwatson if_start(ifp); \ 428130416Smlaier } \ 429130416Smlaier} while (0) 430130416Smlaier 431130416Smlaier#define IFQ_HANDOFF(ifp, m, err) \ 432130512Smlaier IFQ_HANDOFF_ADJ(ifp, m, 0, err) 433130416Smlaier 434130416Smlaier#define IFQ_DRV_DEQUEUE(ifq, m) \ 435130416Smlaierdo { \ 436130416Smlaier (m) = (ifq)->ifq_drv_head; \ 437130416Smlaier if (m) { \ 438130416Smlaier if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \ 439130416Smlaier (ifq)->ifq_drv_tail = NULL; \ 440130416Smlaier (m)->m_nextpkt = NULL; \ 441130416Smlaier (ifq)->ifq_drv_len--; \ 442130416Smlaier } else { \ 443130416Smlaier IFQ_LOCK(ifq); \ 444130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 445130416Smlaier while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \ 446130416Smlaier struct mbuf *m0; \ 447130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m0); \ 448130416Smlaier if (m0 == NULL) \ 449130416Smlaier break; \ 450130416Smlaier m0->m_nextpkt = NULL; \ 451130416Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 452130416Smlaier (ifq)->ifq_drv_head = m0; \ 453130416Smlaier else \ 454130416Smlaier (ifq)->ifq_drv_tail->m_nextpkt = m0; \ 455130416Smlaier (ifq)->ifq_drv_tail = m0; \ 456130416Smlaier (ifq)->ifq_drv_len++; \ 457130416Smlaier } \ 458130416Smlaier IFQ_UNLOCK(ifq); \ 459130416Smlaier } \ 460130416Smlaier} while (0) 461130416Smlaier 462130416Smlaier#define IFQ_DRV_PREPEND(ifq, m) \ 463130416Smlaierdo { \ 464130416Smlaier (m)->m_nextpkt = (ifq)->ifq_drv_head; \ 465132152Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 466132152Smlaier (ifq)->ifq_drv_tail = (m); \ 467130416Smlaier (ifq)->ifq_drv_head = (m); \ 468130416Smlaier (ifq)->ifq_drv_len++; \ 469130416Smlaier} while (0) 470130416Smlaier 471130416Smlaier#define IFQ_DRV_IS_EMPTY(ifq) \ 472130416Smlaier (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0)) 473130416Smlaier 474130416Smlaier#define IFQ_DRV_PURGE(ifq) \ 475130416Smlaierdo { \ 476132152Smlaier struct mbuf *m, *n = (ifq)->ifq_drv_head; \ 477132152Smlaier while((m = n) != NULL) { \ 478132152Smlaier n = m->m_nextpkt; \ 479130416Smlaier m_freem(m); \ 480130416Smlaier } \ 481130416Smlaier (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \ 482130416Smlaier (ifq)->ifq_drv_len = 0; \ 483130416Smlaier IFQ_PURGE(ifq); \ 484130416Smlaier} while (0) 485130416Smlaier 48649459Sbrian/* 48749459Sbrian * 72 was chosen below because it is the size of a TCP/IP 48849459Sbrian * header (40) + the minimum mss (32). 48949459Sbrian */ 49049459Sbrian#define IF_MINMTU 72 49149459Sbrian#define IF_MAXMTU 65535 49249459Sbrian 49355205Speter#endif /* _KERNEL */ 49421259Swollman 49521259Swollman/* 49621259Swollman * The ifaddr structure contains information about one address 49721259Swollman * of an interface. They are maintained by the different address families, 49821259Swollman * are allocated and attached when an address is set, and are linked 49921259Swollman * together so all addresses for an interface can be located. 500128291Sluigi * 501128291Sluigi * NOTE: a 'struct ifaddr' is always at the beginning of a larger 502128291Sluigi * chunk of malloc'ed memory, where we store the three addresses 503128291Sluigi * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 50421259Swollman */ 50521259Swollmanstruct ifaddr { 50621259Swollman struct sockaddr *ifa_addr; /* address of interface */ 50721259Swollman struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 50821259Swollman#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 50921259Swollman struct sockaddr *ifa_netmask; /* used to determine subnet */ 51067334Sjoe struct if_data if_data; /* not all members are meaningful */ 51121259Swollman struct ifnet *ifa_ifp; /* back-pointer to interface */ 51260938Sjake TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 51321259Swollman void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 51492725Salfred (int, struct rtentry *, struct rt_addrinfo *); 51521259Swollman u_short ifa_flags; /* mostly rt_flags for cloning */ 51647254Spb u_int ifa_refcnt; /* references to this structure */ 51721259Swollman int ifa_metric; /* cost of going out this interface */ 51828845Sjulian int (*ifa_claim_addr) /* check if an addr goes to this if */ 51992725Salfred (struct ifaddr *, struct sockaddr *); 520108033Shsu struct mtx ifa_mtx; 52121259Swollman}; 52221259Swollman#define IFA_ROUTE RTF_UP /* route installed */ 52321259Swollman 52453541Sshin/* for compatibility with other BSDs */ 52553541Sshin#define ifa_list ifa_link 52653541Sshin 527108033Shsu#define IFA_LOCK_INIT(ifa) \ 528108033Shsu mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 529108033Shsu#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 530108033Shsu#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 531108033Shsu#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 532108033Shsu 53321404Swollman/* 53452904Sshin * The prefix structure contains information about one prefix 53552904Sshin * of an interface. They are maintained by the different address families, 536108470Sschweikh * are allocated and attached when a prefix or an address is set, 53753541Sshin * and are linked together so all prefixes for an interface can be located. 53852904Sshin */ 53952904Sshinstruct ifprefix { 54052904Sshin struct sockaddr *ifpr_prefix; /* prefix of interface */ 54152904Sshin struct ifnet *ifpr_ifp; /* back-pointer to interface */ 54260938Sjake TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 54352904Sshin u_char ifpr_plen; /* prefix length in bits */ 54452904Sshin u_char ifpr_type; /* protocol dependent prefix type */ 54552904Sshin}; 54652904Sshin 54752904Sshin/* 54821404Swollman * Multicast address structure. This is analogous to the ifaddr 54921404Swollman * structure except that it keeps track of multicast addresses. 55021404Swollman * Also, the reference count here is a count of requests for this 55121404Swollman * address, not a count of pointers to this structure. 55221404Swollman */ 55321404Swollmanstruct ifmultiaddr { 55472084Sphk TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 55521434Swollman struct sockaddr *ifma_addr; /* address this membership is for */ 55621434Swollman struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 55721434Swollman struct ifnet *ifma_ifp; /* back-pointer to interface */ 55821434Swollman u_int ifma_refcount; /* reference count */ 55921434Swollman void *ifma_protospec; /* protocol-specific state, if any */ 56021404Swollman}; 56121404Swollman 56255205Speter#ifdef _KERNEL 563108036Shsu#define IFAFREE(ifa) \ 564108036Shsu do { \ 565108036Shsu IFA_LOCK(ifa); \ 566108036Shsu KASSERT((ifa)->ifa_refcnt > 0, \ 567108036Shsu ("ifa %p !(ifa_refcnt > 0)", ifa)); \ 568108036Shsu if (--(ifa)->ifa_refcnt == 0) { \ 569108036Shsu IFA_DESTROY(ifa); \ 570108036Shsu free(ifa, M_IFADDR); \ 571108036Shsu } else \ 572108036Shsu IFA_UNLOCK(ifa); \ 57346568Speter } while (0) 57421259Swollman 575108036Shsu#define IFAREF(ifa) \ 576108036Shsu do { \ 577108036Shsu IFA_LOCK(ifa); \ 578108036Shsu ++(ifa)->ifa_refcnt; \ 579108036Shsu IFA_UNLOCK(ifa); \ 580108033Shsu } while (0) 581108033Shsu 582108172Shsuextern struct mtx ifnet_lock; 583108298Shsu#define IFNET_LOCK_INIT() \ 584108298Shsu mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE) 585108172Shsu#define IFNET_WLOCK() mtx_lock(&ifnet_lock) 586108172Shsu#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock) 587108172Shsu#define IFNET_RLOCK() IFNET_WLOCK() 588108172Shsu#define IFNET_RUNLOCK() IFNET_WUNLOCK() 589108172Shsu 59083130Sjlemonstruct ifindex_entry { 59187914Sjlemon struct ifnet *ife_ifnet; 59283130Sjlemon struct ifaddr *ife_ifnet_addr; 593130585Sphk struct cdev *ife_dev; 59483130Sjlemon}; 59583130Sjlemon 59683130Sjlemon#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet 597128315Sluigi/* 598128315Sluigi * Given the index, ifaddr_byindex() returns the one and only 599128315Sluigi * link-level ifaddr for the interface. You are not supposed to use 600128315Sluigi * it to traverse the list of addresses associated to the interface. 601128315Sluigi */ 60283130Sjlemon#define ifaddr_byindex(idx) ifindex_table[(idx)].ife_ifnet_addr 60383130Sjlemon#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev 60483130Sjlemon 60521259Swollmanextern struct ifnethead ifnet; 60683130Sjlemonextern struct ifindex_entry *ifindex_table; 60721259Swollmanextern int ifqmaxlen; 60871791Speterextern struct ifnet *loif; /* first loopback interface */ 60921259Swollmanextern int if_index; 61021259Swollman 61192725Salfredint if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 61292725Salfredint if_allmulti(struct ifnet *, int); 613147256Sbrooksstruct ifnet* if_alloc(u_char); 61492725Salfredvoid if_attach(struct ifnet *); 61592725Salfredint if_delmulti(struct ifnet *, struct sockaddr *); 61692725Salfredvoid if_detach(struct ifnet *); 617146620Speadarvoid if_purgeaddrs(struct ifnet *); 61892725Salfredvoid if_down(struct ifnet *); 619147256Sbrooksvoid if_free(struct ifnet *); 620147256Sbrooksvoid if_free_type(struct ifnet *, u_char); 621121816Sbrooksvoid if_initname(struct ifnet *, const char *, int); 622138542Ssamvoid if_link_state_change(struct ifnet *, int); 623103900Sbrooksint if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 62492725Salfredint if_setlladdr(struct ifnet *, const u_char *, int); 62592725Salfredvoid if_up(struct ifnet *); 62692725Salfred/*void ifinit(void);*/ /* declared in systm.h for main() */ 62792725Salfredint ifioctl(struct socket *, u_long, caddr_t, struct thread *); 62892725Salfredint ifpromisc(struct ifnet *, int); 62992725Salfredstruct ifnet *ifunit(const char *); 63021259Swollman 63192725Salfredstruct ifaddr *ifa_ifwithaddr(struct sockaddr *); 63292725Salfredstruct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 63392725Salfredstruct ifaddr *ifa_ifwithnet(struct sockaddr *); 63492725Salfredstruct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 63592725Salfredstruct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 63621259Swollman 63792725Salfredstruct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 63892725Salfredint if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 63921434Swollman 640147256Sbrookstypedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 641147256Sbrookstypedef void if_com_free_t(void *com, u_char type); 642147256Sbrooksvoid if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f); 643147256Sbrooksvoid if_deregister_com_alloc(u_char type); 644147256Sbrooks 64584931Sfjoe#define IF_LLADDR(ifp) \ 64684931Sfjoe LLADDR((struct sockaddr_dl *) ifaddr_byindex((ifp)->if_index)->ifa_addr) 64784931Sfjoe 64887902Sluigi#ifdef DEVICE_POLLING 64987902Sluigienum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER }; 65087902Sluigi 65192725Salfredtypedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 65292725Salfredint ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 65392725Salfredint ether_poll_deregister(struct ifnet *ifp); 65487902Sluigi#endif /* DEVICE_POLLING */ 65587902Sluigi 65655205Speter#endif /* _KERNEL */ 65721259Swollman 65821259Swollman#endif /* !_NET_IF_VAR_H_ */ 659