/* $OpenBSD: if.h,v 1.50 2004/04/17 00:09:01 henning Exp $ */ /* $NetBSD: if.h,v 1.23 1996/05/07 02:40:27 thorpej Exp $ */ /* * 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. 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 8.1 (Berkeley) 6/10/93 */ #ifndef _NET_IF_H_ #define _NET_IF_H_ #include /* * Always include ALTQ glue here -- we use the ALTQ interface queue * structure even when ALTQ is not configured into the kernel so that * the size of struct ifnet does not changed based on the option. The * ALTQ queue structure is API-compatible with the legacy ifqueue. */ #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 struct mbuf; struct proc; struct rtentry; struct socket; struct ether_header; struct arpcom; struct rt_addrinfo; /* * 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); int (*ifc_destroy)(struct ifnet *); }; #define IF_CLONE_INITIALIZER(name, create, destroy) \ { { 0 }, name, sizeof(name) - 1, create, destroy } /* * Structure used to query names of interface cloners. */ struct if_clonereq { int ifcr_total; /* total cloners (out) */ int ifcr_count; /* room for this many in user buffer */ char *ifcr_buffer; /* buffer for cloner names */ }; /* * 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 */ u_char ifi_link_state; /* current link state */ 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 operational state change */ }; /* * Structure defining a queue for a network interface. */ struct ifqueue { struct mbuf *ifq_head; struct mbuf *ifq_tail; int ifq_len; int ifq_maxlen; int ifq_drops; int ifq_congestion; }; /* * 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 */ /* * 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 */ struct hook_desc_head *if_addrhooks; /* address change callbacks */ char if_xname[IFNAMSIZ]; /* external name (name + unit) */ int if_pcount; /* number of promiscuous listeners */ caddr_t if_bpf; /* packet filter structure */ caddr_t if_bridge; /* bridge structure */ caddr_t if_carp; /* carp 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. */ struct if_data if_data; /* stats and other data about if */ int if_capabilities; /* interface capabilities */ /* procedure handles */ /* output routine (enqueue) */ int (*if_output)(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); /* initiate output routine */ void (*if_start)(struct ifnet *); /* ioctl routine */ int (*if_ioctl)(struct ifnet *, u_long, caddr_t); /* init routine */ int (*if_init)(struct ifnet *); /* XXX bus reset routine */ int (*if_reset)(struct ifnet *); /* timer routine */ void (*if_watchdog)(struct ifnet *); struct ifaltq if_snd; /* output queue (includes altq) */ struct sockaddr_dl *if_sadl; /* pointer to our sockaddr_dl */ void *if_afdata[AF_MAX]; }; #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) /* * Some convenience macros used for setting ifi_baudrate. */ #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. */ /* Capabilities that interfaces can advertise. */ #define IFCAP_CSUM_IPv4 0x00000001 /* can do IPv4 header csum */ #define IFCAP_CSUM_TCPv4 0x00000002 /* can do IPv4/TCP csum */ #define IFCAP_CSUM_UDPv4 0x00000004 /* can do IPv4/UDP csum */ #define IFCAP_IPSEC 0x00000008 /* can do IPsec */ #define IFCAP_VLAN_MTU 0x00000010 /* VLAN-compatible MTU */ #define IFCAP_VLAN_HWTAGGING 0x00000020 /* hardware VLAN tag support */ #define IFCAP_IPCOMP 0x00000040 /* can do IPcomp */ /* * 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 IF_INPUT_ENQUEUE(ifq, m) { \ if (IF_QFULL(ifq)) { \ IF_DROP(ifq); \ m_freem(m); \ if (!ifq->ifq_congestion) \ if_congestion(ifq); \ } else \ IF_ENQUEUE(ifq, m); \ } #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) #define IF_PURGE(ifq) \ do { \ struct mbuf *__m0; \ \ for (;;) { \ IF_DEQUEUE((ifq), __m0); \ if (__m0 == NULL) \ break; \ else \ m_freem(__m0); \ } \ } while (0) #define IF_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) #define IFQ_MAXLEN 50 #define IFNET_SLOWHZ 1 /* granularity is 1 second */ /* * 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 */ /* check or clean routes (+ or -)'d */ void (*ifa_rtrequest)(int, struct rtentry *, struct rt_addrinfo *); u_int ifa_flags; /* mostly rt_flags for cloning */ u_int ifa_refcnt; /* count of references */ int ifa_metric; /* cost of going out this interface */ }; #define IFA_ROUTE RTF_UP /* route installed */ /* * 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 compatibility */ 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 */ }; /* * 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 compatibility */ 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; 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_metric /* mtu (overload) */ #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 */ }; /* * 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 */ }; struct if_nameindex { unsigned int if_index; char *if_name; }; #ifndef _KERNEL __BEGIN_DECLS unsigned int if_nametoindex(const char *); char *if_indextoname(unsigned int, char *); struct if_nameindex *if_nameindex(void); __END_DECLS #define if_freenameindex(x) free(x) #endif #include #ifdef _KERNEL #define IFAFREE(ifa) \ do { \ if ((ifa)->ifa_refcnt <= 0) \ ifafree(ifa); \ else \ (ifa)->ifa_refcnt--; \ } while (0) #ifdef ALTQ #define ALTQ_DECL(x) x #define IFQ_ENQUEUE(ifq, m, pattr, err) \ do { \ if (ALTQ_IS_ENABLED((ifq))) \ ALTQ_ENQUEUE((ifq), (m), (pattr), (err)); \ else { \ if (IF_QFULL((ifq))) { \ m_freem((m)); \ (err) = ENOBUFS; \ } else { \ IF_ENQUEUE((ifq), (m)); \ (err) = 0; \ } \ } \ if ((err)) \ (ifq)->ifq_drops++; \ } while (0) #define IFQ_DEQUEUE(ifq, m) \ do { \ if (TBR_IS_ENABLED((ifq))) \ (m) = tbr_dequeue((ifq), ALTDQ_REMOVE); \ else if (ALTQ_IS_ENABLED((ifq))) \ ALTQ_DEQUEUE((ifq), (m)); \ else \ IF_DEQUEUE((ifq), (m)); \ } while (0) #define IFQ_POLL(ifq, m) \ do { \ if (TBR_IS_ENABLED((ifq))) \ (m) = tbr_dequeue((ifq), ALTDQ_POLL); \ else if (ALTQ_IS_ENABLED((ifq))) \ ALTQ_POLL((ifq), (m)); \ else \ IF_POLL((ifq), (m)); \ } while (0) #define IFQ_PURGE(ifq) \ do { \ if (ALTQ_IS_ENABLED((ifq))) \ ALTQ_PURGE((ifq)); \ else \ IF_PURGE((ifq)); \ } while (0) #define IFQ_SET_READY(ifq) \ do { ((ifq)->altq_flags |= ALTQF_READY); } while (0) #define IFQ_CLASSIFY(ifq, m, af, pa) \ do { \ if (ALTQ_IS_ENABLED((ifq))) { \ if (ALTQ_NEEDS_CLASSIFY((ifq))) \ (pa)->pattr_class = (*(ifq)->altq_classify) \ ((ifq)->altq_clfier, (m), (af)); \ (pa)->pattr_af = (af); \ (pa)->pattr_hdr = mtod((m), caddr_t); \ } \ } while (0) #else /* !ALTQ */ #define ALTQ_DECL(x) /* nothing */ #define IFQ_ENQUEUE(ifq, m, pattr, err) \ do { \ if (IF_QFULL((ifq))) { \ m_freem((m)); \ (err) = ENOBUFS; \ } else { \ IF_ENQUEUE((ifq), (m)); \ (err) = 0; \ } \ if ((err)) \ (ifq)->ifq_drops++; \ } while (0) #define IFQ_DEQUEUE(ifq, m) IF_DEQUEUE((ifq), (m)) #define IFQ_POLL(ifq, m) IF_POLL((ifq), (m)) #define IFQ_PURGE(ifq) IF_PURGE((ifq)) #define IFQ_SET_READY(ifq) /* nothing */ #define IFQ_CLASSIFY(ifq, m, af, pa) /* nothing */ #endif /* ALTQ */ #define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) #define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) #define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) #define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) #define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) extern struct ifnet_head ifnet; extern struct ifnet **ifindex2ifnet; extern struct ifnet *lo0ifp; extern int if_indexlim; void ether_ifattach(struct ifnet *); void ether_ifdetach(struct ifnet *); int ether_ioctl(struct ifnet *, struct arpcom *, u_long, caddr_t); void ether_input_mbuf(struct ifnet *, struct mbuf *); void ether_input(struct ifnet *, struct ether_header *, struct mbuf *); int ether_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); char *ether_sprintf(u_char *); void if_alloc_sadl(struct ifnet *); void if_free_sadl(struct ifnet *); void if_attach(struct ifnet *); void if_attachdomain(void); void if_attachtail(struct ifnet *); void if_attachhead(struct ifnet *); void if_detach(struct ifnet *); void if_down(struct ifnet *); void if_qflush(struct ifqueue *); void if_slowtimo(void *); void if_up(struct ifnet *); int ifconf(u_long, caddr_t); void ifinit(void); int ifioctl(struct socket *, u_long, caddr_t, struct proc *); int ifpromisc(struct ifnet *, int); struct ifnet *ifunit(const char *); struct ifaddr *ifa_ifwithaddr(struct sockaddr *); struct ifaddr *ifa_ifwithaf(int); struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); struct ifaddr *ifa_ifwithnet(struct sockaddr *); struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); void ifafree(struct ifaddr *); void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); void if_clone_attach(struct if_clone *); void if_clone_detach(struct if_clone *); int if_clone_create(const char *); int if_clone_destroy(const char *); void if_congestion(struct ifqueue *); int loioctl(struct ifnet *, u_long, caddr_t); void loopattach(int); int looutput(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); void lortrequest(int, struct rtentry *, struct rt_addrinfo *); #endif /* _KERNEL */ #endif /* _NET_IF_H_ */