ifq.h revision 152315
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 152315 2005-11-11 16:04:59Z ru $ 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 128152315Sru * field is deprecated. Use if_addr or 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 *); 161152315Sru struct ifaddr *if_addr; /* pointer to link-level address */ 162137062Srwatson void *if_spare2; /* spare pointer 2 */ 163137062Srwatson void *if_spare3; /* spare pointer 3 */ 164148265Srwatson int if_drv_flags; /* driver-managed status flags */ 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 */ 182148640Srwatson struct mtx if_addr_mtx; /* mutex to protect address lists */ 183152209Sthompsa LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */ 18421259Swollman}; 18569152Sjlemon 18692725Salfredtypedef void if_init_f_t(void *); 18721259Swollman 188128376Sluigi/* 189128376Sluigi * XXX These aliases are terribly dangerous because they could apply 190128376Sluigi * to anything. 191128376Sluigi */ 19221259Swollman#define if_mtu if_data.ifi_mtu 19321259Swollman#define if_type if_data.ifi_type 19421259Swollman#define if_physical if_data.ifi_physical 19521259Swollman#define if_addrlen if_data.ifi_addrlen 19621259Swollman#define if_hdrlen if_data.ifi_hdrlen 19721259Swollman#define if_metric if_data.ifi_metric 198128871Sandre#define if_link_state if_data.ifi_link_state 19921259Swollman#define if_baudrate if_data.ifi_baudrate 20058698Sjlemon#define if_hwassist if_data.ifi_hwassist 20121259Swollman#define if_ipackets if_data.ifi_ipackets 20221259Swollman#define if_ierrors if_data.ifi_ierrors 20321259Swollman#define if_opackets if_data.ifi_opackets 20421259Swollman#define if_oerrors if_data.ifi_oerrors 20521259Swollman#define if_collisions if_data.ifi_collisions 20621259Swollman#define if_ibytes if_data.ifi_ibytes 20721259Swollman#define if_obytes if_data.ifi_obytes 20821259Swollman#define if_imcasts if_data.ifi_imcasts 20921259Swollman#define if_omcasts if_data.ifi_omcasts 21021259Swollman#define if_iqdrops if_data.ifi_iqdrops 21121259Swollman#define if_noproto if_data.ifi_noproto 21221259Swollman#define if_lastchange if_data.ifi_lastchange 21321259Swollman#define if_recvquota if_data.ifi_recvquota 21421259Swollman#define if_xmitquota if_data.ifi_xmitquota 215136950Sjmg#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)NULL) 21621259Swollman 21753541Sshin/* for compatibility with other BSDs */ 21853541Sshin#define if_addrlist if_addrhead 21953541Sshin#define if_list if_link 22053541Sshin 22121259Swollman/* 222148640Srwatson * Locks for address lists on the network interface. 223148640Srwatson */ 224148640Srwatson#define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_mtx, \ 225148640Srwatson "if_addr_mtx", NULL, MTX_DEF) 226148640Srwatson#define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_mtx) 227148640Srwatson#define IF_ADDR_LOCK(if) mtx_lock(&(if)->if_addr_mtx) 228148640Srwatson#define IF_ADDR_UNLOCK(if) mtx_unlock(&(if)->if_addr_mtx) 229148640Srwatson#define IF_ADDR_LOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx, MA_OWNED) 230148640Srwatson 231148640Srwatson/* 23221259Swollman * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 23321259Swollman * are queues of messages stored on ifqueue structures 23421259Swollman * (defined above). Entries are added to and deleted from these structures 23521259Swollman * by these macros, which should be called with ipl raised to splimp(). 23621259Swollman */ 23772200Sbmilekic#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 23872200Sbmilekic#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 239130416Smlaier#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED) 24069152Sjlemon#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 24169152Sjlemon#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 24269152Sjlemon#define _IF_QLEN(ifq) ((ifq)->ifq_len) 24321259Swollman 24469152Sjlemon#define _IF_ENQUEUE(ifq, m) do { \ 24569152Sjlemon (m)->m_nextpkt = NULL; \ 24669152Sjlemon if ((ifq)->ifq_tail == NULL) \ 24769152Sjlemon (ifq)->ifq_head = m; \ 24869152Sjlemon else \ 24969152Sjlemon (ifq)->ifq_tail->m_nextpkt = m; \ 25069152Sjlemon (ifq)->ifq_tail = m; \ 25169152Sjlemon (ifq)->ifq_len++; \ 25269152Sjlemon} while (0) 25369152Sjlemon 25469152Sjlemon#define IF_ENQUEUE(ifq, m) do { \ 25569152Sjlemon IF_LOCK(ifq); \ 25669152Sjlemon _IF_ENQUEUE(ifq, m); \ 25769152Sjlemon IF_UNLOCK(ifq); \ 25869152Sjlemon} while (0) 25969152Sjlemon 26069152Sjlemon#define _IF_PREPEND(ifq, m) do { \ 26169152Sjlemon (m)->m_nextpkt = (ifq)->ifq_head; \ 26269152Sjlemon if ((ifq)->ifq_tail == NULL) \ 26369152Sjlemon (ifq)->ifq_tail = (m); \ 26469152Sjlemon (ifq)->ifq_head = (m); \ 26569152Sjlemon (ifq)->ifq_len++; \ 26669152Sjlemon} while (0) 26769152Sjlemon 26869152Sjlemon#define IF_PREPEND(ifq, m) do { \ 26969152Sjlemon IF_LOCK(ifq); \ 27069152Sjlemon _IF_PREPEND(ifq, m); \ 27169152Sjlemon IF_UNLOCK(ifq); \ 27269152Sjlemon} while (0) 27369152Sjlemon 27469152Sjlemon#define _IF_DEQUEUE(ifq, m) do { \ 27569152Sjlemon (m) = (ifq)->ifq_head; \ 27669152Sjlemon if (m) { \ 277136950Sjmg if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ 27869152Sjlemon (ifq)->ifq_tail = NULL; \ 27969152Sjlemon (m)->m_nextpkt = NULL; \ 28069152Sjlemon (ifq)->ifq_len--; \ 28169152Sjlemon } \ 28269152Sjlemon} while (0) 28369152Sjlemon 28469152Sjlemon#define IF_DEQUEUE(ifq, m) do { \ 28569152Sjlemon IF_LOCK(ifq); \ 28669152Sjlemon _IF_DEQUEUE(ifq, m); \ 28769152Sjlemon IF_UNLOCK(ifq); \ 28869152Sjlemon} while (0) 28969152Sjlemon 290130416Smlaier#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 291130416Smlaier#define IF_POLL(ifq, m) _IF_POLL(ifq, m) 292130416Smlaier 293130416Smlaier#define _IF_DRAIN(ifq) do { \ 29469152Sjlemon struct mbuf *m; \ 29569152Sjlemon for (;;) { \ 29669152Sjlemon _IF_DEQUEUE(ifq, m); \ 29769152Sjlemon if (m == NULL) \ 29869152Sjlemon break; \ 29969152Sjlemon m_freem(m); \ 30069152Sjlemon } \ 30169152Sjlemon} while (0) 30269152Sjlemon 303130416Smlaier#define IF_DRAIN(ifq) do { \ 304130416Smlaier IF_LOCK(ifq); \ 305130416Smlaier _IF_DRAIN(ifq); \ 306130416Smlaier IF_UNLOCK(ifq); \ 307130416Smlaier} while(0) 308130416Smlaier 30955205Speter#ifdef _KERNEL 310126264Smlaier/* interface address change event */ 311126264Smlaiertypedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 312126264SmlaierEVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 313126264Smlaier/* new interface arrival event */ 314126264Smlaiertypedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 315126264SmlaierEVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 316126264Smlaier/* interface departure event */ 317126264Smlaiertypedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 318126264SmlaierEVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 319126264Smlaier 320121470Sume#define IF_AFDATA_LOCK_INIT(ifp) \ 321121470Sume mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 322121470Sume#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 323121470Sume#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 324121470Sume#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 325121470Sume#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 326121470Sume 327136704Srwatson#define IFF_LOCKGIANT(ifp) do { \ 328136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 329136704Srwatson mtx_lock(&Giant); \ 330136704Srwatson} while (0) 331136704Srwatson 332136704Srwatson#define IFF_UNLOCKGIANT(ifp) do { \ 333136704Srwatson if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 334136704Srwatson mtx_unlock(&Giant); \ 335136704Srwatson} while (0) 336136704Srwatson 337137065Srwatsonint if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, 338137065Srwatson int adjust); 339130416Smlaier#define IF_HANDOFF(ifq, m, ifp) \ 340130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, 0) 341130416Smlaier#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \ 342130416Smlaier if_handoff((struct ifqueue *)ifq, m, ifp, adj) 34321259Swollman 344132712Srwatsonvoid if_start(struct ifnet *); 345132712Srwatson 346130416Smlaier#define IFQ_ENQUEUE(ifq, m, err) \ 347130416Smlaierdo { \ 348130416Smlaier IF_LOCK(ifq); \ 349130416Smlaier if (ALTQ_IS_ENABLED(ifq)) \ 350130416Smlaier ALTQ_ENQUEUE(ifq, m, NULL, err); \ 351130416Smlaier else { \ 352130416Smlaier if (_IF_QFULL(ifq)) { \ 353130416Smlaier m_freem(m); \ 354130416Smlaier (err) = ENOBUFS; \ 355130416Smlaier } else { \ 356130416Smlaier _IF_ENQUEUE(ifq, m); \ 357130416Smlaier (err) = 0; \ 358130416Smlaier } \ 359130416Smlaier } \ 360130416Smlaier if (err) \ 361130416Smlaier (ifq)->ifq_drops++; \ 362130416Smlaier IF_UNLOCK(ifq); \ 363130416Smlaier} while (0) 36421259Swollman 365130416Smlaier#define IFQ_DEQUEUE_NOLOCK(ifq, m) \ 366130416Smlaierdo { \ 367130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 368130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \ 369130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 370130416Smlaier ALTQ_DEQUEUE(ifq, m); \ 371130416Smlaier else \ 372130416Smlaier _IF_DEQUEUE(ifq, m); \ 373130416Smlaier} while (0) 374130416Smlaier 375130416Smlaier#define IFQ_DEQUEUE(ifq, m) \ 376130416Smlaierdo { \ 377130416Smlaier IF_LOCK(ifq); \ 378130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 379130416Smlaier IF_UNLOCK(ifq); \ 380130416Smlaier} while (0) 381130416Smlaier 382130416Smlaier#define IFQ_POLL_NOLOCK(ifq, m) \ 383130416Smlaierdo { \ 384130416Smlaier if (TBR_IS_ENABLED(ifq)) \ 385130508Smlaier (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \ 386130416Smlaier else if (ALTQ_IS_ENABLED(ifq)) \ 387130416Smlaier ALTQ_POLL(ifq, m); \ 388130416Smlaier else \ 389130416Smlaier _IF_POLL(ifq, m); \ 390130416Smlaier} while (0) 391130416Smlaier 392130416Smlaier#define IFQ_POLL(ifq, m) \ 393130416Smlaierdo { \ 394130416Smlaier IF_LOCK(ifq); \ 395130416Smlaier IFQ_POLL_NOLOCK(ifq, m); \ 396130416Smlaier IF_UNLOCK(ifq); \ 397130416Smlaier} while (0) 398130416Smlaier 399130416Smlaier#define IFQ_PURGE_NOLOCK(ifq) \ 400130416Smlaierdo { \ 401130416Smlaier if (ALTQ_IS_ENABLED(ifq)) { \ 402130416Smlaier ALTQ_PURGE(ifq); \ 403130416Smlaier } else \ 404130416Smlaier _IF_DRAIN(ifq); \ 405130416Smlaier} while (0) 406130416Smlaier 407130416Smlaier#define IFQ_PURGE(ifq) \ 408130416Smlaierdo { \ 409130416Smlaier IF_LOCK(ifq); \ 410130416Smlaier IFQ_PURGE_NOLOCK(ifq); \ 411130416Smlaier IF_UNLOCK(ifq); \ 412130416Smlaier} while (0) 413130416Smlaier 414130416Smlaier#define IFQ_SET_READY(ifq) \ 415130416Smlaier do { ((ifq)->altq_flags |= ALTQF_READY); } while (0) 416130416Smlaier 417130416Smlaier#define IFQ_LOCK(ifq) IF_LOCK(ifq) 418130416Smlaier#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq) 419130416Smlaier#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq) 420130416Smlaier#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 421130416Smlaier#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 422130416Smlaier#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 423130416Smlaier#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 424130416Smlaier#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 425130416Smlaier 426148886Srwatson/* 427148886Srwatson * The IFF_DRV_OACTIVE test should really occur in the device driver, not in 428148886Srwatson * the handoff logic, as that flag is locked by the device driver. 429148886Srwatson */ 430130416Smlaier#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \ 431130416Smlaierdo { \ 432130416Smlaier int len; \ 433130416Smlaier short mflags; \ 434130416Smlaier \ 435130416Smlaier len = (m)->m_pkthdr.len; \ 436130416Smlaier mflags = (m)->m_flags; \ 437130416Smlaier IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \ 438130416Smlaier if ((err) == 0) { \ 439130416Smlaier (ifp)->if_obytes += len + (adj); \ 440130416Smlaier if (mflags & M_MCAST) \ 441130416Smlaier (ifp)->if_omcasts++; \ 442148886Srwatson if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0) \ 443132712Srwatson if_start(ifp); \ 444130416Smlaier } \ 445130416Smlaier} while (0) 446130416Smlaier 447130416Smlaier#define IFQ_HANDOFF(ifp, m, err) \ 448130512Smlaier IFQ_HANDOFF_ADJ(ifp, m, 0, err) 449130416Smlaier 450130416Smlaier#define IFQ_DRV_DEQUEUE(ifq, m) \ 451130416Smlaierdo { \ 452130416Smlaier (m) = (ifq)->ifq_drv_head; \ 453130416Smlaier if (m) { \ 454130416Smlaier if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \ 455130416Smlaier (ifq)->ifq_drv_tail = NULL; \ 456130416Smlaier (m)->m_nextpkt = NULL; \ 457130416Smlaier (ifq)->ifq_drv_len--; \ 458130416Smlaier } else { \ 459130416Smlaier IFQ_LOCK(ifq); \ 460130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m); \ 461130416Smlaier while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \ 462130416Smlaier struct mbuf *m0; \ 463130416Smlaier IFQ_DEQUEUE_NOLOCK(ifq, m0); \ 464130416Smlaier if (m0 == NULL) \ 465130416Smlaier break; \ 466130416Smlaier m0->m_nextpkt = NULL; \ 467130416Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 468130416Smlaier (ifq)->ifq_drv_head = m0; \ 469130416Smlaier else \ 470130416Smlaier (ifq)->ifq_drv_tail->m_nextpkt = m0; \ 471130416Smlaier (ifq)->ifq_drv_tail = m0; \ 472130416Smlaier (ifq)->ifq_drv_len++; \ 473130416Smlaier } \ 474130416Smlaier IFQ_UNLOCK(ifq); \ 475130416Smlaier } \ 476130416Smlaier} while (0) 477130416Smlaier 478130416Smlaier#define IFQ_DRV_PREPEND(ifq, m) \ 479130416Smlaierdo { \ 480130416Smlaier (m)->m_nextpkt = (ifq)->ifq_drv_head; \ 481132152Smlaier if ((ifq)->ifq_drv_tail == NULL) \ 482132152Smlaier (ifq)->ifq_drv_tail = (m); \ 483130416Smlaier (ifq)->ifq_drv_head = (m); \ 484130416Smlaier (ifq)->ifq_drv_len++; \ 485130416Smlaier} while (0) 486130416Smlaier 487130416Smlaier#define IFQ_DRV_IS_EMPTY(ifq) \ 488130416Smlaier (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0)) 489130416Smlaier 490130416Smlaier#define IFQ_DRV_PURGE(ifq) \ 491130416Smlaierdo { \ 492132152Smlaier struct mbuf *m, *n = (ifq)->ifq_drv_head; \ 493132152Smlaier while((m = n) != NULL) { \ 494132152Smlaier n = m->m_nextpkt; \ 495130416Smlaier m_freem(m); \ 496130416Smlaier } \ 497130416Smlaier (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \ 498130416Smlaier (ifq)->ifq_drv_len = 0; \ 499130416Smlaier IFQ_PURGE(ifq); \ 500130416Smlaier} while (0) 501130416Smlaier 50249459Sbrian/* 50349459Sbrian * 72 was chosen below because it is the size of a TCP/IP 50449459Sbrian * header (40) + the minimum mss (32). 50549459Sbrian */ 50649459Sbrian#define IF_MINMTU 72 50749459Sbrian#define IF_MAXMTU 65535 50849459Sbrian 50955205Speter#endif /* _KERNEL */ 51021259Swollman 51121259Swollman/* 51221259Swollman * The ifaddr structure contains information about one address 51321259Swollman * of an interface. They are maintained by the different address families, 51421259Swollman * are allocated and attached when an address is set, and are linked 51521259Swollman * together so all addresses for an interface can be located. 516128291Sluigi * 517128291Sluigi * NOTE: a 'struct ifaddr' is always at the beginning of a larger 518128291Sluigi * chunk of malloc'ed memory, where we store the three addresses 519128291Sluigi * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 52021259Swollman */ 52121259Swollmanstruct ifaddr { 52221259Swollman struct sockaddr *ifa_addr; /* address of interface */ 52321259Swollman struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 52421259Swollman#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 52521259Swollman struct sockaddr *ifa_netmask; /* used to determine subnet */ 52667334Sjoe struct if_data if_data; /* not all members are meaningful */ 52721259Swollman struct ifnet *ifa_ifp; /* back-pointer to interface */ 52860938Sjake TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 52921259Swollman void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 53092725Salfred (int, struct rtentry *, struct rt_addrinfo *); 53121259Swollman u_short ifa_flags; /* mostly rt_flags for cloning */ 53247254Spb u_int ifa_refcnt; /* references to this structure */ 53321259Swollman int ifa_metric; /* cost of going out this interface */ 53428845Sjulian int (*ifa_claim_addr) /* check if an addr goes to this if */ 53592725Salfred (struct ifaddr *, struct sockaddr *); 536108033Shsu struct mtx ifa_mtx; 53721259Swollman}; 53821259Swollman#define IFA_ROUTE RTF_UP /* route installed */ 53921259Swollman 54053541Sshin/* for compatibility with other BSDs */ 54153541Sshin#define ifa_list ifa_link 54253541Sshin 543108033Shsu#define IFA_LOCK_INIT(ifa) \ 544108033Shsu mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 545108033Shsu#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 546108033Shsu#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 547108033Shsu#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 548108033Shsu 54921404Swollman/* 55052904Sshin * The prefix structure contains information about one prefix 55152904Sshin * of an interface. They are maintained by the different address families, 552108470Sschweikh * are allocated and attached when a prefix or an address is set, 55353541Sshin * and are linked together so all prefixes for an interface can be located. 55452904Sshin */ 55552904Sshinstruct ifprefix { 55652904Sshin struct sockaddr *ifpr_prefix; /* prefix of interface */ 55752904Sshin struct ifnet *ifpr_ifp; /* back-pointer to interface */ 55860938Sjake TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 55952904Sshin u_char ifpr_plen; /* prefix length in bits */ 56052904Sshin u_char ifpr_type; /* protocol dependent prefix type */ 56152904Sshin}; 56252904Sshin 56352904Sshin/* 56421404Swollman * Multicast address structure. This is analogous to the ifaddr 56521404Swollman * structure except that it keeps track of multicast addresses. 56621404Swollman * Also, the reference count here is a count of requests for this 56721404Swollman * address, not a count of pointers to this structure. 56821404Swollman */ 56921404Swollmanstruct ifmultiaddr { 57072084Sphk TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 57121434Swollman struct sockaddr *ifma_addr; /* address this membership is for */ 57221434Swollman struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 57321434Swollman struct ifnet *ifma_ifp; /* back-pointer to interface */ 57421434Swollman u_int ifma_refcount; /* reference count */ 57521434Swollman void *ifma_protospec; /* protocol-specific state, if any */ 57621404Swollman}; 57721404Swollman 57855205Speter#ifdef _KERNEL 579108036Shsu#define IFAFREE(ifa) \ 580108036Shsu do { \ 581108036Shsu IFA_LOCK(ifa); \ 582108036Shsu KASSERT((ifa)->ifa_refcnt > 0, \ 583108036Shsu ("ifa %p !(ifa_refcnt > 0)", ifa)); \ 584108036Shsu if (--(ifa)->ifa_refcnt == 0) { \ 585108036Shsu IFA_DESTROY(ifa); \ 586108036Shsu free(ifa, M_IFADDR); \ 587108036Shsu } else \ 588108036Shsu IFA_UNLOCK(ifa); \ 58946568Speter } while (0) 59021259Swollman 591108036Shsu#define IFAREF(ifa) \ 592108036Shsu do { \ 593108036Shsu IFA_LOCK(ifa); \ 594108036Shsu ++(ifa)->ifa_refcnt; \ 595108036Shsu IFA_UNLOCK(ifa); \ 596108033Shsu } while (0) 597108033Shsu 598108172Shsuextern struct mtx ifnet_lock; 599108298Shsu#define IFNET_LOCK_INIT() \ 600108298Shsu mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE) 601108172Shsu#define IFNET_WLOCK() mtx_lock(&ifnet_lock) 602108172Shsu#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock) 603108172Shsu#define IFNET_RLOCK() IFNET_WLOCK() 604108172Shsu#define IFNET_RUNLOCK() IFNET_WUNLOCK() 605108172Shsu 60683130Sjlemonstruct ifindex_entry { 60787914Sjlemon struct ifnet *ife_ifnet; 608130585Sphk struct cdev *ife_dev; 60983130Sjlemon}; 61083130Sjlemon 61183130Sjlemon#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet 612128315Sluigi/* 613128315Sluigi * Given the index, ifaddr_byindex() returns the one and only 614128315Sluigi * link-level ifaddr for the interface. You are not supposed to use 615128315Sluigi * it to traverse the list of addresses associated to the interface. 616128315Sluigi */ 617152315Sru#define ifaddr_byindex(idx) ifnet_byindex(idx)->if_addr 61883130Sjlemon#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev 61983130Sjlemon 62021259Swollmanextern struct ifnethead ifnet; 62183130Sjlemonextern struct ifindex_entry *ifindex_table; 62221259Swollmanextern int ifqmaxlen; 62371791Speterextern struct ifnet *loif; /* first loopback interface */ 62421259Swollmanextern int if_index; 62521259Swollman 62692725Salfredint if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 62792725Salfredint if_allmulti(struct ifnet *, int); 628147256Sbrooksstruct ifnet* if_alloc(u_char); 62992725Salfredvoid if_attach(struct ifnet *); 63092725Salfredint if_delmulti(struct ifnet *, struct sockaddr *); 63192725Salfredvoid if_detach(struct ifnet *); 632146620Speadarvoid if_purgeaddrs(struct ifnet *); 63392725Salfredvoid if_down(struct ifnet *); 634147256Sbrooksvoid if_free(struct ifnet *); 635147256Sbrooksvoid if_free_type(struct ifnet *, u_char); 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 65292725Salfredint if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 65321434Swollman 654147256Sbrookstypedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 655147256Sbrookstypedef void if_com_free_t(void *com, u_char type); 656147256Sbrooksvoid if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f); 657147256Sbrooksvoid if_deregister_com_alloc(u_char type); 658147256Sbrooks 65984931Sfjoe#define IF_LLADDR(ifp) \ 660152315Sru LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr)) 66184931Sfjoe 66287902Sluigi#ifdef DEVICE_POLLING 663150789Sglebiusenum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS }; 66487902Sluigi 66592725Salfredtypedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 66692725Salfredint ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 66792725Salfredint ether_poll_deregister(struct ifnet *ifp); 66887902Sluigi#endif /* DEVICE_POLLING */ 66987902Sluigi 67055205Speter#endif /* _KERNEL */ 67121259Swollman 67221259Swollman#endif /* !_NET_IF_VAR_H_ */ 673