ifq.h revision 128376
121259Swollman/* 221259Swollman * Copyright (c) 1982, 1986, 1989, 1993 321259Swollman * The Regents of the University of California. All rights reserved. 421259Swollman * 521259Swollman * Redistribution and use in source and binary forms, with or without 621259Swollman * modification, are permitted provided that the following conditions 721259Swollman * are met: 821259Swollman * 1. Redistributions of source code must retain the above copyright 921259Swollman * notice, this list of conditions and the following disclaimer. 1021259Swollman * 2. Redistributions in binary form must reproduce the above copyright 1121259Swollman * notice, this list of conditions and the following disclaimer in the 1221259Swollman * documentation and/or other materials provided with the distribution. 1321259Swollman * 4. Neither the name of the University nor the names of its contributors 1421259Swollman * may be used to endorse or promote products derived from this software 1521259Swollman * without specific prior written permission. 1621259Swollman * 1721259Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1821259Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1921259Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2021259Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2121259Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2221259Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2321259Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2421259Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2521259Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2621259Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2721259Swollman * SUCH DAMAGE. 2821259Swollman * 2921259Swollman * From: @(#)if.h 8.1 (Berkeley) 6/10/93 3050477Speter * $FreeBSD: head/sys/net/if_var.h 128376 2004-04-18 01:15:32Z luigi $ 3121259Swollman */ 3221259Swollman 3321259Swollman#ifndef _NET_IF_VAR_H_ 3421259Swollman#define _NET_IF_VAR_H_ 3521259Swollman 3621259Swollman/* 3721259Swollman * Structures defining a network interface, providing a packet 3821259Swollman * transport mechanism (ala level 0 of the PUP protocols). 3921259Swollman * 4021259Swollman * Each interface accepts output datagrams of a specified maximum 4121259Swollman * length, and provides higher level routines with input datagrams 4221259Swollman * received from its medium. 4321259Swollman * 4421259Swollman * Output occurs when the routine if_output is called, with three parameters: 4521259Swollman * (*ifp->if_output)(ifp, m, dst, rt) 4621259Swollman * Here m is the mbuf chain to be sent and dst is the destination address. 4721259Swollman * The output routine encapsulates the supplied datagram if necessary, 4821259Swollman * and then transmits it on its medium. 4921259Swollman * 5021259Swollman * On input, each interface unwraps the data received by it, and either 51108533Sschweikh * places it on the input queue of an internetwork datagram routine 5221259Swollman * and posts the associated software interrupt, or passes the datagram to a raw 5321259Swollman * packet input routine. 5421259Swollman * 5521259Swollman * Routines exist for locating interfaces by their addresses 56108533Sschweikh * or for locating an interface on a certain network, as well as more general 5721259Swollman * routing and gateway routines maintaining information used to locate 5821259Swollman * interfaces. These routines live in the files if.c and route.c 5921259Swollman */ 6021259Swollman 6121259Swollman#ifdef __STDC__ 6221259Swollman/* 6321259Swollman * Forward structure declarations for function prototypes [sic]. 6421259Swollman */ 6521259Swollmanstruct mbuf; 6683366Sjulianstruct thread; 6721259Swollmanstruct rtentry; 6885074Srustruct rt_addrinfo; 6921259Swollmanstruct socket; 7021259Swollmanstruct ether_header; 7121259Swollman#endif 7221259Swollman 7321259Swollman#include <sys/queue.h> /* get TAILQ macros */ 7421259Swollman 7569224Sjlemon#ifdef _KERNEL 7669152Sjlemon#include <sys/mbuf.h> 77126264Smlaier#include <sys/eventhandler.h> 7869224Sjlemon#endif /* _KERNEL */ 7974914Sjhb#include <sys/lock.h> /* XXX */ 8074914Sjhb#include <sys/mutex.h> /* XXX */ 8183130Sjlemon#include <sys/event.h> /* XXX */ 8269152Sjlemon 83121816Sbrooks#define IF_DUNIT_NONE -1 84121816Sbrooks 8560938SjakeTAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 8660938SjakeTAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 8760938SjakeTAILQ_HEAD(ifprefixhead, ifprefix); 8872084SphkTAILQ_HEAD(ifmultihead, ifmultiaddr); 8921259Swollman 9021259Swollman/* 9121259Swollman * Structure defining a queue for a network interface. 9221259Swollman */ 9321259Swollmanstruct ifqueue { 9421259Swollman struct mbuf *ifq_head; 9521259Swollman struct mbuf *ifq_tail; 9621259Swollman int ifq_len; 9721259Swollman int ifq_maxlen; 9821259Swollman int ifq_drops; 9969152Sjlemon struct mtx ifq_mtx; 10021259Swollman}; 10121259Swollman 10221259Swollman/* 10321259Swollman * Structure defining a network interface. 10421259Swollman * 10521259Swollman * (Would like to call this struct ``if'', but C isn't PL/1.) 10621259Swollman */ 10784380Smjacob 10884380Smjacob/* 10984380Smjacob * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 11084380Smjacob * one of these structures, typically held within an arpcom structure. 11186797Sluigi * 11286797Sluigi * struct <foo>_softc { 11386797Sluigi * struct arpcom { 11486797Sluigi * struct ifnet ac_if; 11586797Sluigi * ... 11686797Sluigi * } <arpcom> ; 11786797Sluigi * ... 11886797Sluigi * }; 11986797Sluigi * 12086797Sluigi * The assumption is used in a number of places, including many 12186797Sluigi * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 12286797Sluigi * 12386797Sluigi * Unfortunately devices' softc are opaque, so we depend on this layout 12486797Sluigi * to locate the struct ifnet from the softc in the generic code. 12586797Sluigi * 12684380Smjacob */ 12721259Swollmanstruct ifnet { 12821259Swollman void *if_softc; /* pointer to driver state */ 12960938Sjake TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 130121816Sbrooks char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 131121816Sbrooks const char *if_dname; /* driver name */ 132121816Sbrooks int if_dunit; /* unit or IF_DUNIT_NONE */ 13321259Swollman struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 134128291Sluigi /* 135128291Sluigi * if_addrhead is the list of all addresses associated to 136128315Sluigi * an interface. 137128315Sluigi * Some code in the kernel assumes that first element 138128315Sluigi * of the list has type AF_LINK, and contains sockaddr_dl 139128315Sluigi * addresses which store the link-level address and the name 140128291Sluigi * of the interface. 141128315Sluigi * However, access to the AF_LINK address through this 142128315Sluigi * field is deprecated. Use ifaddr_byindex() instead. 143128291Sluigi */ 14483130Sjlemon struct klist if_klist; /* events attached to this if */ 14583130Sjlemon int if_pcount; /* number of promiscuous listeners */ 14621259Swollman struct bpf_if *if_bpf; /* packet filter structure */ 14721259Swollman u_short if_index; /* numeric abbreviation for this if */ 14821259Swollman short if_timer; /* time 'til if_watchdog called */ 149106931Ssam u_short if_nvlans; /* number of active vlans */ 150102052Ssobomax int if_flags; /* up/down, broadcast, etc. */ 15183624Sjlemon int if_capabilities; /* interface capabilities */ 15283624Sjlemon int if_capenable; /* enabled features */ 15321259Swollman void *if_linkmib; /* link-type-specific MIB data */ 15421259Swollman size_t if_linkmiblen; /* length of above data */ 15521259Swollman struct if_data if_data; 15621404Swollman struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 15721404Swollman int if_amcount; /* number of all-multicast requests */ 15821259Swollman/* procedure handles */ 15921259Swollman int (*if_output) /* output routine (enqueue) */ 16092725Salfred (struct ifnet *, struct mbuf *, struct sockaddr *, 16192725Salfred struct rtentry *); 162106931Ssam void (*if_input) /* input routine (from h/w driver) */ 163106931Ssam (struct ifnet *, struct mbuf *); 16421259Swollman void (*if_start) /* initiate output routine */ 16592725Salfred (struct ifnet *); 16621259Swollman int (*if_ioctl) /* ioctl routine */ 16792725Salfred (struct ifnet *, u_long, caddr_t); 16821259Swollman void (*if_watchdog) /* timer routine */ 16992725Salfred (struct ifnet *); 17021259Swollman void (*if_init) /* Init routine */ 17192725Salfred (void *); 17221404Swollman int (*if_resolvemulti) /* validate/resolve multicast */ 17392725Salfred (struct ifnet *, struct sockaddr **, struct sockaddr *); 17421259Swollman struct ifqueue if_snd; /* output queue */ 175123220Simp const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 176127828Sluigi 177127828Sluigi struct lltable *lltables; /* list of L3-L2 resolution tables */ 178127828Sluigi 179122524Srwatson struct label *if_label; /* interface MAC label */ 180121161Sume 181127828Sluigi /* these are only used by IPv6 */ 182127828Sluigi struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 183121161Sume void *if_afdata[AF_MAX]; 184121470Sume int if_afdata_initialized; 185121470Sume struct mtx if_afdata_mtx; 18621259Swollman}; 18769152Sjlemon 18892725Salfredtypedef void if_init_f_t(void *); 18921259Swollman 190128376Sluigi/* 191128376Sluigi * XXX These aliases are terribly dangerous because they could apply 192128376Sluigi * to anything. 193128376Sluigi */ 19421259Swollman#define if_mtu if_data.ifi_mtu 19521259Swollman#define if_type if_data.ifi_type 19621259Swollman#define if_physical if_data.ifi_physical 19721259Swollman#define if_addrlen if_data.ifi_addrlen 19821259Swollman#define if_hdrlen if_data.ifi_hdrlen 19921259Swollman#define if_metric if_data.ifi_metric 20021259Swollman#define if_baudrate if_data.ifi_baudrate 20158698Sjlemon#define if_hwassist if_data.ifi_hwassist 20221259Swollman#define if_ipackets if_data.ifi_ipackets 20321259Swollman#define if_ierrors if_data.ifi_ierrors 20421259Swollman#define if_opackets if_data.ifi_opackets 20521259Swollman#define if_oerrors if_data.ifi_oerrors 20621259Swollman#define if_collisions if_data.ifi_collisions 20721259Swollman#define if_ibytes if_data.ifi_ibytes 20821259Swollman#define if_obytes if_data.ifi_obytes 20921259Swollman#define if_imcasts if_data.ifi_imcasts 21021259Swollman#define if_omcasts if_data.ifi_omcasts 21121259Swollman#define if_iqdrops if_data.ifi_iqdrops 21221259Swollman#define if_noproto if_data.ifi_noproto 21321259Swollman#define if_lastchange if_data.ifi_lastchange 21421259Swollman#define if_recvquota if_data.ifi_recvquota 21521259Swollman#define if_xmitquota if_data.ifi_xmitquota 21621259Swollman#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0) 21721259Swollman 21853541Sshin/* for compatibility with other BSDs */ 21953541Sshin#define if_addrlist if_addrhead 22053541Sshin#define if_list if_link 22153541Sshin 22221259Swollman/* 22321259Swollman * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 22421259Swollman * are queues of messages stored on ifqueue structures 22521259Swollman * (defined above). Entries are added to and deleted from these structures 22621259Swollman * by these macros, which should be called with ipl raised to splimp(). 22721259Swollman */ 22872200Sbmilekic#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 22972200Sbmilekic#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 23069152Sjlemon#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 23169152Sjlemon#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 23269152Sjlemon#define _IF_QLEN(ifq) ((ifq)->ifq_len) 23321259Swollman 23469152Sjlemon#define _IF_ENQUEUE(ifq, m) do { \ 23569152Sjlemon (m)->m_nextpkt = NULL; \ 23669152Sjlemon if ((ifq)->ifq_tail == NULL) \ 23769152Sjlemon (ifq)->ifq_head = m; \ 23869152Sjlemon else \ 23969152Sjlemon (ifq)->ifq_tail->m_nextpkt = m; \ 24069152Sjlemon (ifq)->ifq_tail = m; \ 24169152Sjlemon (ifq)->ifq_len++; \ 24269152Sjlemon} while (0) 24369152Sjlemon 24469152Sjlemon#define IF_ENQUEUE(ifq, m) do { \ 24569152Sjlemon IF_LOCK(ifq); \ 24669152Sjlemon _IF_ENQUEUE(ifq, m); \ 24769152Sjlemon IF_UNLOCK(ifq); \ 24869152Sjlemon} while (0) 24969152Sjlemon 25069152Sjlemon#define _IF_PREPEND(ifq, m) do { \ 25169152Sjlemon (m)->m_nextpkt = (ifq)->ifq_head; \ 25269152Sjlemon if ((ifq)->ifq_tail == NULL) \ 25369152Sjlemon (ifq)->ifq_tail = (m); \ 25469152Sjlemon (ifq)->ifq_head = (m); \ 25569152Sjlemon (ifq)->ifq_len++; \ 25669152Sjlemon} while (0) 25769152Sjlemon 25869152Sjlemon#define IF_PREPEND(ifq, m) do { \ 25969152Sjlemon IF_LOCK(ifq); \ 26069152Sjlemon _IF_PREPEND(ifq, m); \ 26169152Sjlemon IF_UNLOCK(ifq); \ 26269152Sjlemon} while (0) 26369152Sjlemon 26469152Sjlemon#define _IF_DEQUEUE(ifq, m) do { \ 26569152Sjlemon (m) = (ifq)->ifq_head; \ 26669152Sjlemon if (m) { \ 26769152Sjlemon if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 26869152Sjlemon (ifq)->ifq_tail = NULL; \ 26969152Sjlemon (m)->m_nextpkt = NULL; \ 27069152Sjlemon (ifq)->ifq_len--; \ 27169152Sjlemon } \ 27269152Sjlemon} while (0) 27369152Sjlemon 27469152Sjlemon#define IF_DEQUEUE(ifq, m) do { \ 27569152Sjlemon IF_LOCK(ifq); \ 27669152Sjlemon _IF_DEQUEUE(ifq, m); \ 27769152Sjlemon IF_UNLOCK(ifq); \ 27869152Sjlemon} while (0) 27969152Sjlemon 28069152Sjlemon#define IF_DRAIN(ifq) do { \ 28169152Sjlemon struct mbuf *m; \ 28269152Sjlemon IF_LOCK(ifq); \ 28369152Sjlemon for (;;) { \ 28469152Sjlemon _IF_DEQUEUE(ifq, m); \ 28569152Sjlemon if (m == NULL) \ 28669152Sjlemon break; \ 28769152Sjlemon m_freem(m); \ 28869152Sjlemon } \ 28969152Sjlemon IF_UNLOCK(ifq); \ 29069152Sjlemon} while (0) 29169152Sjlemon 29255205Speter#ifdef _KERNEL 293126264Smlaier/* interface address change event */ 294126264Smlaiertypedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 295126264SmlaierEVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 296126264Smlaier/* new interface arrival event */ 297126264Smlaiertypedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 298126264SmlaierEVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 299126264Smlaier/* interface departure event */ 300126264Smlaiertypedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 301126264SmlaierEVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 302126264Smlaier/* interface clone event */ 303126264Smlaiertypedef void (*if_clone_event_handler_t)(void *, struct if_clone *); 304126264SmlaierEVENTHANDLER_DECLARE(if_clone_event, if_clone_event_handler_t); 305126264Smlaier 306121470Sume#define IF_AFDATA_LOCK_INIT(ifp) \ 307121470Sume mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 308121470Sume#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 309121470Sume#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 310121470Sume#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 311121470Sume#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 312121470Sume 31369152Sjlemon#define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 31469152Sjlemon#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 31521259Swollman 31635210Sbdestatic __inline int 31769152Sjlemonif_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 31821259Swollman{ 31969152Sjlemon int active = 0; 32021259Swollman 32169152Sjlemon IF_LOCK(ifq); 32269152Sjlemon if (_IF_QFULL(ifq)) { 32369152Sjlemon _IF_DROP(ifq); 32469152Sjlemon IF_UNLOCK(ifq); 32569152Sjlemon m_freem(m); 32669152Sjlemon return (0); 32769152Sjlemon } 32869152Sjlemon if (ifp != NULL) { 32969152Sjlemon ifp->if_obytes += m->m_pkthdr.len + adjust; 330128157Sru if (m->m_flags & (M_BCAST|M_MCAST)) 33169152Sjlemon ifp->if_omcasts++; 33269152Sjlemon active = ifp->if_flags & IFF_OACTIVE; 33369152Sjlemon } 33469152Sjlemon _IF_ENQUEUE(ifq, m); 33569152Sjlemon IF_UNLOCK(ifq); 33686364Sjhb if (ifp != NULL && !active) 33796173Simp (*ifp->if_start)(ifp); 33869152Sjlemon return (1); 33921259Swollman} 34021259Swollman 34149459Sbrian/* 34249459Sbrian * 72 was chosen below because it is the size of a TCP/IP 34349459Sbrian * header (40) + the minimum mss (32). 34449459Sbrian */ 34549459Sbrian#define IF_MINMTU 72 34649459Sbrian#define IF_MAXMTU 65535 34749459Sbrian 34855205Speter#endif /* _KERNEL */ 34921259Swollman 35021259Swollman/* 35121259Swollman * The ifaddr structure contains information about one address 35221259Swollman * of an interface. They are maintained by the different address families, 35321259Swollman * are allocated and attached when an address is set, and are linked 35421259Swollman * together so all addresses for an interface can be located. 355128291Sluigi * 356128291Sluigi * NOTE: a 'struct ifaddr' is always at the beginning of a larger 357128291Sluigi * chunk of malloc'ed memory, where we store the three addresses 358128291Sluigi * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 35921259Swollman */ 36021259Swollmanstruct ifaddr { 36121259Swollman struct sockaddr *ifa_addr; /* address of interface */ 36221259Swollman struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 36321259Swollman#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 36421259Swollman struct sockaddr *ifa_netmask; /* used to determine subnet */ 36567334Sjoe struct if_data if_data; /* not all members are meaningful */ 36621259Swollman struct ifnet *ifa_ifp; /* back-pointer to interface */ 36760938Sjake TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 36821259Swollman void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 36992725Salfred (int, struct rtentry *, struct rt_addrinfo *); 37021259Swollman u_short ifa_flags; /* mostly rt_flags for cloning */ 37147254Spb u_int ifa_refcnt; /* references to this structure */ 37221259Swollman int ifa_metric; /* cost of going out this interface */ 37328845Sjulian int (*ifa_claim_addr) /* check if an addr goes to this if */ 37492725Salfred (struct ifaddr *, struct sockaddr *); 375108033Shsu struct mtx ifa_mtx; 37621259Swollman}; 37721259Swollman#define IFA_ROUTE RTF_UP /* route installed */ 37821259Swollman 37953541Sshin/* for compatibility with other BSDs */ 38053541Sshin#define ifa_list ifa_link 38153541Sshin 382108033Shsu#define IFA_LOCK_INIT(ifa) \ 383108033Shsu mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 384108033Shsu#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 385108033Shsu#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 386108033Shsu#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 387108033Shsu 38821404Swollman/* 38952904Sshin * The prefix structure contains information about one prefix 39052904Sshin * of an interface. They are maintained by the different address families, 391108470Sschweikh * are allocated and attached when a prefix or an address is set, 39253541Sshin * and are linked together so all prefixes for an interface can be located. 39352904Sshin */ 39452904Sshinstruct ifprefix { 39552904Sshin struct sockaddr *ifpr_prefix; /* prefix of interface */ 39652904Sshin struct ifnet *ifpr_ifp; /* back-pointer to interface */ 39760938Sjake TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 39852904Sshin u_char ifpr_plen; /* prefix length in bits */ 39952904Sshin u_char ifpr_type; /* protocol dependent prefix type */ 40052904Sshin}; 40152904Sshin 40252904Sshin/* 40321404Swollman * Multicast address structure. This is analogous to the ifaddr 40421404Swollman * structure except that it keeps track of multicast addresses. 40521404Swollman * Also, the reference count here is a count of requests for this 40621404Swollman * address, not a count of pointers to this structure. 40721404Swollman */ 40821404Swollmanstruct ifmultiaddr { 40972084Sphk TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 41021434Swollman struct sockaddr *ifma_addr; /* address this membership is for */ 41121434Swollman struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 41221434Swollman struct ifnet *ifma_ifp; /* back-pointer to interface */ 41321434Swollman u_int ifma_refcount; /* reference count */ 41421434Swollman void *ifma_protospec; /* protocol-specific state, if any */ 41521404Swollman}; 41621404Swollman 41755205Speter#ifdef _KERNEL 418108036Shsu#define IFAFREE(ifa) \ 419108036Shsu do { \ 420108036Shsu IFA_LOCK(ifa); \ 421108036Shsu KASSERT((ifa)->ifa_refcnt > 0, \ 422108036Shsu ("ifa %p !(ifa_refcnt > 0)", ifa)); \ 423108036Shsu if (--(ifa)->ifa_refcnt == 0) { \ 424108036Shsu IFA_DESTROY(ifa); \ 425108036Shsu free(ifa, M_IFADDR); \ 426108036Shsu } else \ 427108036Shsu IFA_UNLOCK(ifa); \ 42846568Speter } while (0) 42921259Swollman 430108036Shsu#define IFAREF(ifa) \ 431108036Shsu do { \ 432108036Shsu IFA_LOCK(ifa); \ 433108036Shsu ++(ifa)->ifa_refcnt; \ 434108036Shsu IFA_UNLOCK(ifa); \ 435108033Shsu } while (0) 436108033Shsu 437108172Shsuextern struct mtx ifnet_lock; 438108298Shsu#define IFNET_LOCK_INIT() \ 439108298Shsu mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE) 440108172Shsu#define IFNET_WLOCK() mtx_lock(&ifnet_lock) 441108172Shsu#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock) 442108172Shsu#define IFNET_RLOCK() IFNET_WLOCK() 443108172Shsu#define IFNET_RUNLOCK() IFNET_WUNLOCK() 444108172Shsu 44583130Sjlemonstruct ifindex_entry { 44687914Sjlemon struct ifnet *ife_ifnet; 44783130Sjlemon struct ifaddr *ife_ifnet_addr; 44883130Sjlemon dev_t ife_dev; 44983130Sjlemon}; 45083130Sjlemon 45183130Sjlemon#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet 452128315Sluigi/* 453128315Sluigi * Given the index, ifaddr_byindex() returns the one and only 454128315Sluigi * link-level ifaddr for the interface. You are not supposed to use 455128315Sluigi * it to traverse the list of addresses associated to the interface. 456128315Sluigi */ 45783130Sjlemon#define ifaddr_byindex(idx) ifindex_table[(idx)].ife_ifnet_addr 45883130Sjlemon#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev 45983130Sjlemon 46021259Swollmanextern struct ifnethead ifnet; 46183130Sjlemonextern struct ifindex_entry *ifindex_table; 46221259Swollmanextern int ifqmaxlen; 46371791Speterextern struct ifnet *loif; /* first loopback interface */ 46421259Swollmanextern int if_index; 46521259Swollman 46692725Salfredint if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 46792725Salfredint if_allmulti(struct ifnet *, int); 46892725Salfredvoid if_attach(struct ifnet *); 46992725Salfredint if_delmulti(struct ifnet *, struct sockaddr *); 47092725Salfredvoid if_detach(struct ifnet *); 47192725Salfredvoid if_down(struct ifnet *); 472121816Sbrooksvoid if_initname(struct ifnet *, const char *, int); 473103900Sbrooksint if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 47492725Salfredvoid if_route(struct ifnet *, int flag, int fam); 47592725Salfredint if_setlladdr(struct ifnet *, const u_char *, int); 47692725Salfredvoid if_unroute(struct ifnet *, int flag, int fam); 47792725Salfredvoid if_up(struct ifnet *); 47892725Salfred/*void ifinit(void);*/ /* declared in systm.h for main() */ 47992725Salfredint ifioctl(struct socket *, u_long, caddr_t, struct thread *); 48092725Salfredint ifpromisc(struct ifnet *, int); 48192725Salfredstruct ifnet *ifunit(const char *); 48221259Swollman 48392725Salfredstruct ifaddr *ifa_ifwithaddr(struct sockaddr *); 48492725Salfredstruct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 48592725Salfredstruct ifaddr *ifa_ifwithnet(struct sockaddr *); 48692725Salfredstruct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 48792725Salfredstruct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 48821259Swollman 48992725Salfredstruct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 49092725Salfredint if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 49121434Swollman 49292725Salfredvoid if_clone_attach(struct if_clone *); 49392725Salfredvoid if_clone_detach(struct if_clone *); 49479103Sbrooks 49592725Salfredint if_clone_create(char *, int); 49692725Salfredint if_clone_destroy(const char *); 49779103Sbrooks 49884931Sfjoe#define IF_LLADDR(ifp) \ 49984931Sfjoe LLADDR((struct sockaddr_dl *) ifaddr_byindex((ifp)->if_index)->ifa_addr) 50084931Sfjoe 50187902Sluigi#ifdef DEVICE_POLLING 50287902Sluigienum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER }; 50387902Sluigi 50492725Salfredtypedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 50592725Salfredint ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 50692725Salfredint ether_poll_deregister(struct ifnet *ifp); 50787902Sluigi#endif /* DEVICE_POLLING */ 50887902Sluigi 50955205Speter#endif /* _KERNEL */ 51021259Swollman 51121259Swollman#endif /* !_NET_IF_VAR_H_ */ 512