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| /*!\file net/if.h |
| * Network interface data. |
| */ |
| |
| /* $NetBSD: if.h,v 1.29 1997/10/02 19:41:57 is 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. 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 8.1 (Berkeley) 6/10/93 |
| */ |
| |
| #ifndef __NET_IF_H |
| #define __NET_IF_H |
| |
| #include <sys/queue.h> |
| |
| /* |
| * 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 |
| */ |
| #ifndef __SYS_WTIME_H |
| #include <sys/wtime.h> |
| #endif |
| |
| struct mbuf; |
| struct rtentry; |
| struct ether_header; |
| struct proc { int dummy; }; |
| struct socket { int dummy; }; |
| |
| /* |
| * 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_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 */ |
| }; |
| |
| /* |
| * 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 |
| |
| #ifndef IF_NAMESIZE |
| #define IF_NAMESIZE IFNAMSIZ |
| #endif |
| |
| 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(xx, 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 */ |
| int (*if_output) /* output routine (enqueue) */ |
| (struct ifnet *, struct mbuf *, struct sockaddr *, |
| struct rtentry *); |
| void (*if_start) /* initiate output routine */ |
| (struct ifnet *); |
| int (*if_ioctl) /* ioctl routine */ |
| (struct ifnet *, u_long, caddr_t); |
| int (*if_reset) /* XXX bus reset routine */ |
| (struct ifnet *); |
| void (*if_watchdog) /* timer routine */ |
| (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 */ |
| }; |
| |
| #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_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) |
| |
| /* |
| * 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 */ |
| |
| /* |
| * 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 */ |
| void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ |
| (int, struct rtentry *, struct sockaddr *); |
| u_short ifa_flags; /* mostly rt_flags for cloning */ |
| short 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 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 */ |
| }; |
| |
| /* |
| * 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 */ |
| }; |
| |
| /* |
| * 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_hwaddr; |
| struct sockaddr ifru_broadaddr; |
| short ifru_flags; |
| int ifru_metric; |
| int ifru_mtu; |
| 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_hwaddr ifr_ifru.ifru_hwaddr /* hardware address */ |
| #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_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 */ |
| }; |
| |
| #ifndef __NET_IF_ARP_H |
| #include <net/if_arp.h> |
| #endif |
| |
| #endif |