/* $NetBSD: if.h,v 1.52 2000/07/04 19:09:17 thorpej Exp $ */ /*- * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by William Studnemund and Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)if.h 8.3 (Berkeley) 2/9/95 */ #ifndef _NET_IF_H_ #define _NET_IF_H_ #if !defined(_XOPEN_SOURCE) #include /* * Structures defining a network interface, providing a packet * transport mechanism (ala level 0 of the PUP protocols). * * Each interface accepts output datagrams of a specified maximum * length, and provides higher level routines with input datagrams * received from its medium. * * Output occurs when the routine if_output is called, with four parameters: * (*ifp->if_output)(ifp, m, dst, rt) * Here m is the mbuf chain to be sent and dst is the destination address. * The output routine encapsulates the supplied datagram if necessary, * and then transmits it on its medium. * * On input, each interface unwraps the data received by it, and either * places it on the input queue of a internetwork datagram routine * and posts the associated software interrupt, or passes the datagram to a raw * packet input routine. * * Routines exist for locating interfaces by their addresses * or for locating a interface on a certain network, as well as more general * routing and gateway routines maintaining information used to locate * interfaces. These routines live in the files if.c and route.c */ /* XXX fast fix for SNMP, going away soon */ #include #if defined(_KERNEL) && !defined(_LKM) #include "opt_compat_netbsd.h" #endif struct mbuf; struct proc; struct rtentry; struct socket; struct ether_header; struct ifnet; /* * Structure describing a `cloning' interface. */ struct if_clone { LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */ const char *ifc_name; /* name of device, e.g. `gif' */ size_t ifc_namelen; /* length of name */ int (*ifc_create)(struct if_clone *, int); void (*ifc_destroy)(struct ifnet *); }; #define IF_CLONE_INITIALIZER(name, create, destroy) \ { { 0 }, name, sizeof(name) - 1, create, destroy } /* * Structure defining statistics and other data kept regarding a network * interface. */ struct if_data { /* generic interface information */ u_char ifi_type; /* ethernet, tokenring, etc. */ u_char ifi_addrlen; /* media address length */ u_char ifi_hdrlen; /* media header length */ int ifi_link_state; /* current link state */ u_quad_t ifi_mtu; /* maximum transmission unit */ u_quad_t ifi_metric; /* routing metric (external only) */ u_quad_t ifi_baudrate; /* linespeed */ /* volatile statistics */ u_quad_t ifi_ipackets; /* packets received on interface */ u_quad_t ifi_ierrors; /* input errors on interface */ u_quad_t ifi_opackets; /* packets sent on interface */ u_quad_t ifi_oerrors; /* output errors on interface */ u_quad_t ifi_collisions; /* collisions on csma interfaces */ u_quad_t ifi_ibytes; /* total number of octets received */ u_quad_t ifi_obytes; /* total number of octets sent */ u_quad_t ifi_imcasts; /* packets received via multicast */ u_quad_t ifi_omcasts; /* packets sent via multicast */ u_quad_t ifi_iqdrops; /* dropped on input, this interface */ u_quad_t ifi_noproto; /* destined for unsupported protocol */ struct timeval ifi_lastchange; /* last updated */ }; /* * Values for if_link_state. */ #define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */ #define LINK_STATE_DOWN 1 /* link is down */ #define LINK_STATE_UP 2 /* link is up */ #if defined(_KERNEL) && defined(COMPAT_14) /* Pre-1.5 if_data struct */ struct if_data14 { /* generic interface information */ u_char ifi_type; /* ethernet, tokenring, etc. */ u_char ifi_addrlen; /* media address length */ u_char ifi_hdrlen; /* media header length */ u_long ifi_mtu; /* maximum transmission unit */ u_long ifi_metric; /* routing metric (external only) */ u_long ifi_baudrate; /* linespeed */ /* volatile statistics */ u_long ifi_ipackets; /* packets received on interface */ u_long ifi_ierrors; /* input errors on interface */ u_long ifi_opackets; /* packets sent on interface */ u_long ifi_oerrors; /* output errors on interface */ u_long ifi_collisions; /* collisions on csma interfaces */ u_long ifi_ibytes; /* total number of octets received */ u_long ifi_obytes; /* total number of octets sent */ u_long ifi_imcasts; /* packets received via multicast */ u_long ifi_omcasts; /* packets sent via multicast */ u_long ifi_iqdrops; /* dropped on input, this interface */ u_long ifi_noproto; /* destined for unsupported protocol */ struct timeval ifi_lastchange; /* last updated */ }; #endif /* _KERNEL && COMPAT_14 */ /* * Structure defining a queue for a network interface. * * (Would like to call this struct ``if'', but C isn't PL/1.) */ TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */ /* * Length of interface external name, including terminating '\0'. * Note: this is the same size as a generic device's external name. */ #define IFNAMSIZ 16 #define IF_NAMESIZE IFNAMSIZ struct ifnet { /* and the entries */ void *if_softc; /* lower-level data for this if */ TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */ TAILQ_HEAD(, ifaddr) if_addrlist; /* linked list of addresses per if */ char if_xname[IFNAMSIZ]; /* external name (name + unit) */ int if_pcount; /* number of promiscuous listeners */ caddr_t if_bpf; /* packet filter structure */ u_short if_index; /* numeric abbreviation for this if */ short if_timer; /* time 'til if_watchdog called */ short if_flags; /* up/down, broadcast, etc. */ short if__pad1; /* be nice to m68k ports */ struct if_data if_data; /* statistics and other data about if */ /* * Procedure handles. If you add more of these, don't forget the * corresponding NULL stub in if.c. */ int (*if_output) /* output routine (enqueue) */ __P((struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *)); void (*if_input) /* input routine (from h/w driver) */ __P((struct ifnet *, struct mbuf *)); void (*if_start) /* initiate output routine */ __P((struct ifnet *)); int (*if_ioctl) /* ioctl routine */ __P((struct ifnet *, u_long, caddr_t)); int (*if_reset) /* XXX bus reset routine */ __P((struct ifnet *)); void (*if_watchdog) /* timer routine */ __P((struct ifnet *)); void (*if_drain) /* routine to release resources */ __P((struct ifnet *)); struct ifqueue { struct mbuf *ifq_head; struct mbuf *ifq_tail; int ifq_len; int ifq_maxlen; int ifq_drops; } if_snd; /* output queue */ struct sockaddr_dl *if_sadl; /* pointer to our sockaddr_dl */ u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ struct ifprefix *if_prefixlist; /* linked list of prefixes per if */ }; #define if_mtu if_data.ifi_mtu #define if_type if_data.ifi_type #define if_addrlen if_data.ifi_addrlen #define if_hdrlen if_data.ifi_hdrlen #define if_metric if_data.ifi_metric #define if_link_state if_data.ifi_link_state #define if_baudrate if_data.ifi_baudrate #define if_ipackets if_data.ifi_ipackets #define if_ierrors if_data.ifi_ierrors #define if_opackets if_data.ifi_opackets #define if_oerrors if_data.ifi_oerrors #define if_collisions if_data.ifi_collisions #define if_ibytes if_data.ifi_ibytes #define if_obytes if_data.ifi_obytes #define if_imcasts if_data.ifi_imcasts #define if_omcasts if_data.ifi_omcasts #define if_iqdrops if_data.ifi_iqdrops #define if_noproto if_data.ifi_noproto #define if_lastchange if_data.ifi_lastchange #define IFF_UP 0x1 /* interface is up */ #define IFF_BROADCAST 0x2 /* broadcast address valid */ #define IFF_DEBUG 0x4 /* turn on debugging */ #define IFF_LOOPBACK 0x8 /* is a loopback net */ #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ #define IFF_NOTRAILERS 0x20 /* avoid use of trailers */ #define IFF_RUNNING 0x40 /* resources allocated */ #define IFF_NOARP 0x80 /* no address resolution protocol */ #define IFF_PROMISC 0x100 /* receive all packets */ #define IFF_ALLMULTI 0x200 /* receive all multicast packets */ #define IFF_OACTIVE 0x400 /* transmission in progress */ #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */ #define IFF_LINK0 0x1000 /* per link layer defined bit */ #define IFF_LINK1 0x2000 /* per link layer defined bit */ #define IFF_LINK2 0x4000 /* per link layer defined bit */ #define IFF_MULTICAST 0x8000 /* supports multicast */ /* flags set internally only: */ #define IFF_CANTCHANGE \ (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC) /* * Some convenience macros used for setting ifi_baudrate. * XXX 1000 vs. 1024? --thorpej@netbsd.org */ #define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */ #define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */ #define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */ /* * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) * input routines have queues of messages stored on ifqueue structures * (defined above). Entries are added to and deleted from these structures * by these macros, which should be called with ipl raised to splimp(). */ #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) #define IF_DROP(ifq) ((ifq)->ifq_drops++) #define IF_ENQUEUE(ifq, m) { \ (m)->m_nextpkt = 0; \ if ((ifq)->ifq_tail == 0) \ (ifq)->ifq_head = m; \ else \ (ifq)->ifq_tail->m_nextpkt = m; \ (ifq)->ifq_tail = m; \ (ifq)->ifq_len++; \ } #define IF_PREPEND(ifq, m) { \ (m)->m_nextpkt = (ifq)->ifq_head; \ if ((ifq)->ifq_tail == 0) \ (ifq)->ifq_tail = (m); \ (ifq)->ifq_head = (m); \ (ifq)->ifq_len++; \ } #define IF_DEQUEUE(ifq, m) { \ (m) = (ifq)->ifq_head; \ if (m) { \ if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ (ifq)->ifq_tail = 0; \ (m)->m_nextpkt = 0; \ (ifq)->ifq_len--; \ } \ } #define IFQ_MAXLEN 50 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ /* * Structure defining statistics and other data kept regarding an address * on a network interface. */ struct ifaddr_data { int64_t ifad_inbytes; int64_t ifad_outbytes; }; /* * The ifaddr structure contains information about one address * of an interface. They are maintained by the different address families, * are allocated and attached when an address is set, and are linked * together so all addresses for an interface can be located. */ struct ifaddr { struct sockaddr *ifa_addr; /* address of interface */ struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ struct sockaddr *ifa_netmask; /* used to determine subnet */ struct ifnet *ifa_ifp; /* back-pointer to interface */ TAILQ_ENTRY(ifaddr) ifa_list; /* list of addresses for interface */ struct ifaddr_data ifa_data; /* statistics on the address */ void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ __P((int, struct rtentry *, struct sockaddr *)); u_int ifa_flags; /* mostly rt_flags for cloning */ int ifa_refcnt; /* count of references */ int ifa_metric; /* cost of going out this interface */ }; #define IFA_ROUTE RTF_UP /* route installed */ /* * The prefix structure contains information about one prefix * of an interface. They are maintained by the different address families, * are allocated and attached when an prefix or an address is set, * and are linked together so all prfefixes for an interface can be located. */ struct ifprefix { struct sockaddr *ifpr_prefix; /* prefix of interface */ struct ifnet *ifpr_ifp; /* back-pointer to interface */ struct ifprefix *ifpr_next; u_char ifpr_plen; /* prefix length in bits */ u_char ifpr_type; /* protocol dependent prefix type */ }; /* * Message format for use in obtaining information about interfaces * from sysctl and the routing socket. */ struct if_msghdr { u_short ifm_msglen; /* to skip over non-understood messages */ u_char ifm_version; /* future binary compatability */ u_char ifm_type; /* message type */ int ifm_addrs; /* like rtm_addrs */ int ifm_flags; /* value of if_flags */ u_short ifm_index; /* index for associated ifp */ struct if_data ifm_data;/* statistics and other data about if */ }; #if defined(_KERNEL) && defined(COMPAT_14) /* pre-1.5 if_msghdr (ifm_data changed) */ struct if_msghdr14 { u_short ifm_msglen; /* to skip over non-understood messages */ u_char ifm_version; /* future binary compatability */ u_char ifm_type; /* message type */ int ifm_addrs; /* like rtm_addrs */ int ifm_flags; /* value of if_flags */ u_short ifm_index; /* index for associated ifp */ struct if_data14 ifm_data; /* statistics and other data about if */ }; #endif /* _KERNEL && COMPAT_14 */ /* * Message format for use in obtaining information about interface addresses * from sysctl and the routing socket. */ struct ifa_msghdr { u_short ifam_msglen; /* to skip over non-understood messages */ u_char ifam_version; /* future binary compatability */ u_char ifam_type; /* message type */ int ifam_addrs; /* like rtm_addrs */ int ifam_flags; /* value of ifa_flags */ u_short ifam_index; /* index for associated ifp */ int ifam_metric; /* value of ifa_metric */ }; /* * Message format announcing the arrival or departure of a network interface. */ struct if_announcemsghdr { u_short ifan_msglen; /* to skip over non-understood messages */ u_char ifan_version; /* future binary compatibility */ u_char ifan_type; /* message type */ u_short ifan_index; /* index for associated ifp */ char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */ u_short ifan_what; /* what type of announcement */ }; #define IFAN_ARRIVAL 0 /* interface arrival */ #define IFAN_DEPARTURE 1 /* interface departure */ /* * Interface request structure used for socket * ioctl's. All interface ioctl's must have parameter * definitions which begin with ifr_name. The * remainder may be interface specific. */ struct ifreq { char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ union { struct sockaddr ifru_addr; struct sockaddr ifru_dstaddr; struct sockaddr ifru_broadaddr; short ifru_flags; int ifru_metric; int ifru_mtu; u_int ifru_value; caddr_t ifru_data; } ifr_ifru; #define ifr_addr ifr_ifru.ifru_addr /* address */ #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ #define ifr_flags ifr_ifru.ifru_flags /* flags */ #define ifr_metric ifr_ifru.ifru_metric /* metric */ #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ #define ifr_value ifr_ifru.ifru_value /* generic value */ #define ifr_media ifr_ifru.ifru_metric /* media options (overload) */ #define ifr_data ifr_ifru.ifru_data /* for use by interface */ }; struct ifaliasreq { char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ struct sockaddr ifra_addr; struct sockaddr ifra_dstaddr; #define ifra_broadaddr ifra_dstaddr struct sockaddr ifra_mask; }; struct ifmediareq { char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ int ifm_current; /* current media options */ int ifm_mask; /* don't care mask */ int ifm_status; /* media status */ int ifm_active; /* active options */ int ifm_count; /* # entries in ifm_ulist array */ int *ifm_ulist; /* media words */ }; struct ifdrv { char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */ unsigned long ifd_cmd; size_t ifd_len; void *ifd_data; }; /* * Structure used in SIOCGIFCONF request. * Used to retrieve interface configuration * for machine (useful for programs which * must know all networks accessible). */ struct ifconf { int ifc_len; /* size of associated buffer */ union { caddr_t ifcu_buf; struct ifreq *ifcu_req; } ifc_ifcu; #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ }; /* * Structure for SIOC[AGD]LIFADDR */ struct if_laddrreq { char iflr_name[IFNAMSIZ]; unsigned int flags; #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */ unsigned int prefixlen; /* in/out */ struct sockaddr_storage addr; /* in/out */ struct sockaddr_storage dstaddr; /* out */ }; #include #endif /* !_XOPEN_SOURCE */ #ifdef _KERNEL #ifdef IFAREF_DEBUG #define IFAREF(ifa) \ do { \ printf("IFAREF: %s:%d %p -> %d\n", __FILE__, __LINE__, \ (ifa), ++(ifa)->ifa_refcnt); \ } while (0) #define IFAFREE(ifa) \ do { \ if ((ifa)->ifa_refcnt <= 0) \ panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ __LINE__, (ifa)); \ printf("IFAFREE: %s:%d %p -> %d\n", __FILE__, __LINE__, \ (ifa), --(ifa)->ifa_refcnt); \ if ((ifa)->ifa_refcnt == 0) \ ifafree(ifa); \ } while (0) #else #define IFAREF(ifa) (ifa)->ifa_refcnt++ #ifdef DIAGNOSTIC #define IFAFREE(ifa) \ do { \ if ((ifa)->ifa_refcnt <= 0) \ panic("%s:%d: %p ifa_refcnt <= 0", __FILE__, \ __LINE__, (ifa)); \ if (--(ifa)->ifa_refcnt == 0) \ ifafree(ifa); \ } while (0) #else #define IFAFREE(ifa) \ do { \ if (--(ifa)->ifa_refcnt == 0) \ ifafree(ifa); \ } while (0) #endif /* DIAGNOSTIC */ #endif /* IFAREF_DEBUG */ struct ifnet_head ifnet; extern struct ifnet **ifindex2ifnet; #if 0 struct ifnet loif[]; #endif extern int if_index; void ether_ifattach __P((struct ifnet *, const u_int8_t *)); void ether_ifdetach __P((struct ifnet *)); char *ether_sprintf __P((const u_char *)); void if_attach __P((struct ifnet *)); void if_deactivate __P((struct ifnet *)); void if_detach __P((struct ifnet *)); void if_down __P((struct ifnet *)); void if_qflush __P((struct ifqueue *)); void if_slowtimo __P((void *)); void if_up __P((struct ifnet *)); int ifconf __P((u_long, caddr_t)); void ifinit __P((void)); int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *)); int ifpromisc __P((struct ifnet *, int)); struct ifnet *ifunit __P((const char *)); struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *)); struct ifaddr *ifa_ifwithaf __P((int)); struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *)); struct ifaddr *ifa_ifwithnet __P((struct sockaddr *)); struct ifaddr *ifa_ifwithladdr __P((struct sockaddr *)); struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *, struct sockaddr *)); struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *)); void ifafree __P((struct ifaddr *)); void link_rtrequest __P((int, struct rtentry *, struct sockaddr *)); void if_clone_attach __P((struct if_clone *)); void if_clone_detach __P((struct if_clone *)); int if_clone_create __P((const char *)); int if_clone_destroy __P((const char *)); int loioctl __P((struct ifnet *, u_long, caddr_t)); void loopattach __P((int)); int looutput __P((struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *)); void lortrequest __P((int, struct rtentry *, struct sockaddr *)); /* * These are exported because they're an easy way to tell if * an interface is going away without having to burn a flag. */ int if_nulloutput __P((struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *)); void if_nullinput __P((struct ifnet *, struct mbuf *)); void if_nullstart __P((struct ifnet *)); int if_nullioctl __P((struct ifnet *, u_long, caddr_t)); int if_nullreset __P((struct ifnet *)); void if_nullwatchdog __P((struct ifnet *)); void if_nulldrain __P((struct ifnet *)); #else struct if_nameindex { unsigned int if_index; /* 1, 2, ... */ char *if_name; /* null terminated name: "le0", ... */ }; #include __BEGIN_DECLS unsigned int if_nametoindex __P((const char *)); char * if_indextoname __P((unsigned int, char *)); struct if_nameindex * if_nameindex __P((void)); void if_freenameindex __P((struct if_nameindex *)); __END_DECLS #endif /* _KERNEL */ #endif /* !_NET_IF_H_ */