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Diffstat (limited to 'c/src/exec/libnetworking/net/if.h')
| -rw-r--r-- | c/src/exec/libnetworking/net/if.h | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/c/src/exec/libnetworking/net/if.h b/c/src/exec/libnetworking/net/if.h new file mode 100644 index 0000000000..acddd4f095 --- /dev/null +++ b/c/src/exec/libnetworking/net/if.h @@ -0,0 +1,467 @@ +/* + * 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 + * $Id$ + */ + +#ifndef _NET_IF_H_ +#define _NET_IF_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 three 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 _TIME_ /* XXX fast fix for SNMP, going away soon */ +#include <sys/time.h> +#endif + +#ifdef __STDC__ +/* + * Forward structure declarations for function prototypes [sic]. + */ +struct mbuf; +struct proc; +struct rtentry; +struct socket; +struct ether_header; +#endif + +/* + * Structure describing information about an interface + * which may be of interest to management entities. + */ +struct if_data { + /* generic interface information */ + u_char ifi_type; /* ethernet, tokenring, etc */ + u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */ + u_char ifi_addrlen; /* media address length */ + u_char ifi_hdrlen; /* media header length */ + u_char ifi_recvquota; /* polling quota for receive intrs */ + u_char ifi_xmitquota; /* polling quota for xmit intrs */ + 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 */ + u_long ifi_recvtiming; /* usec spent receiving when timing */ + u_long ifi_xmittiming; /* usec spent xmitting when timing */ + struct timeval ifi_lastchange; /* time of last administrative 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; +}; + +/* + * Structure defining a network interface. + * + * (Would like to call this struct ``if'', but C isn't PL/1.) + */ +struct ifnet { + void *if_softc; /* pointer to driver state */ + char *if_name; /* name, e.g. ``en'' or ``lo'' */ + struct ifnet *if_next; /* all struct ifnets are chained */ + struct ifaddr *if_addrlist; /* linked list of addresses per if */ + int if_pcount; /* number of promiscuous listeners */ + struct bpf_if *if_bpf; /* packet filter structure */ + u_short if_index; /* numeric abbreviation for this if */ + short if_unit; /* sub-unit for lower level driver */ + short if_timer; /* time 'til if_watchdog called */ + short if_flags; /* up/down, broadcast, etc. */ + int if_ipending; /* interrupts pending */ + void *if_linkmib; /* link-type-specific MIB data */ + size_t if_linkmiblen; /* length of above data */ + struct if_data if_data; +/* procedure handles */ + int (*if_output) /* output routine (enqueue) */ + __P((struct ifnet *, struct mbuf *, struct sockaddr *, + struct rtentry *)); + void (*if_start) /* initiate output routine */ + __P((struct ifnet *)); + int (*if_done) /* output complete routine */ + __P((struct ifnet *)); /* (XXX not used; fake prototype) */ + int (*if_ioctl) /* ioctl routine */ + __P((struct ifnet *, int, caddr_t)); + void (*if_watchdog) /* timer routine */ + __P((struct ifnet *)); + int (*if_poll_recv) /* polled receive routine */ + __P((struct ifnet *, int *)); + int (*if_poll_xmit) /* polled transmit routine */ + __P((struct ifnet *, int *)); + void (*if_poll_intren) /* polled interrupt reenable routine */ + __P((struct ifnet *)); + void (*if_poll_slowinput) /* input routine for slow devices */ + __P((struct ifnet *, struct mbuf *)); + void (*if_init) /* Init routine */ + __P((void *)); + struct ifqueue if_snd; /* output queue */ + struct ifqueue *if_poll_slowq; /* input queue for slow devices */ +}; +typedef void if_init_f_t __P((void *)); + +#define if_mtu if_data.ifi_mtu +#define if_type if_data.ifi_type +#define if_physical if_data.ifi_physical +#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 if_recvquota if_data.ifi_recvquota +#define if_xmitquota if_data.ifi_xmitquota +#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0) + +#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 * obsolete: 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_ALTPHYS IFF_LINK2 /* use alternate physical connection */ +#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) + + +/* + * These really don't belong here, but there's no other obviously appropriate + * location. + */ +#define IFP_AUI 0 +#define IFP_10BASE2 1 +#define IFP_10BASET 2 +/* etc. */ + +/* + * Bit values in if_ipending + */ +#define IFI_RECV 1 /* I want to receive */ +#define IFI_XMIT 2 /* I want to transmit */ + +/* + * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) + * are 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--; \ + } \ +} + +#ifdef KERNEL +#define IF_ENQ_DROP(ifq, m) if_enq_drop(ifq, m) + +#if defined(__GNUC__) && defined(MT_HEADER) +static inline int +if_queue_drop(struct ifqueue *ifq, struct mbuf *m) +{ + IF_DROP(ifq); + return 0; +} + +static inline int +if_enq_drop(struct ifqueue *ifq, struct mbuf *m) +{ + if (IF_QFULL(ifq) && + !if_queue_drop(ifq, m)) + return 0; + IF_ENQUEUE(ifq, m); + return 1; +} +#else + +#ifdef MT_HEADER +int if_enq_drop __P((struct ifqueue *, struct mbuf *)); +#endif + +#endif +#endif /* KERNEL */ + +#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 */ + struct ifaddr *ifa_next; /* next address for interface */ + void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ + __P((int, struct rtentry *, struct sockaddr *)); + u_short ifa_flags; /* mostly rt_flags for cloning */ + short ifa_refcnt; /* references to this structure */ + int ifa_metric; /* cost of going out this interface */ +#ifdef notdef + struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ +#endif + int (*ifa_claim_addr) /* check if an addr goes to this if */ + __P((struct ifaddr *, struct sockaddr *)); + +}; +#define IFA_ROUTE RTF_UP /* route installed */ + +/* + * Message format for use in obtaining information about interfaces + * from getkerninfo 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 getkerninfo 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 { +#define IFNAMSIZ 16 + 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; + int ifru_phys; + int ifru_media; + 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_phys ifr_ifru.ifru_phys /* physical wire */ +#define ifr_media ifr_ifru.ifru_media /* physical media */ +#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_broadaddr; + 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 */ +}; + +#include <net/if_arp.h> + +#ifdef KERNEL +#define IFAFREE(ifa) \ + if ((ifa)->ifa_refcnt <= 0) \ + ifafree(ifa); \ + else \ + (ifa)->ifa_refcnt--; + +extern struct ifnet *ifnet; +extern int ifqmaxlen; +extern struct ifnet loif[]; +extern int if_index; +extern struct ifaddr **ifnet_addrs; + +void ether_ifattach __P((struct ifnet *)); +void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *)); +int ether_output __P((struct ifnet *, + struct mbuf *, struct sockaddr *, struct rtentry *)); +int ether_ioctl __P((struct ifnet *, int , caddr_t )); + +void if_attach __P((struct ifnet *)); +void if_down __P((struct ifnet *)); +void if_up __P((struct ifnet *)); +#ifdef vax +void ifubareset __P((int)); +#endif +/*void ifinit __P((void));*/ /* declared in systm.h for main() */ +int ifioctl __P((struct socket *, int, caddr_t, struct proc *)); +int ifpromisc __P((struct ifnet *, int)); +struct ifnet *ifunit __P((char *)); + +int if_poll_recv_slow __P((struct ifnet *ifp, int *quotap)); +void if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap)); +void if_poll_throttle __P((void)); +void if_poll_unthrottle __P((void *)); +void if_poll_init __P((void)); +void if_poll __P((void)); + +struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *)); +struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *)); +struct ifaddr *ifa_ifwithnet __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 *)); + +int looutput __P((struct ifnet *, + struct mbuf *, struct sockaddr *, struct rtentry *)); +#endif /* KERNEL */ + +#endif /* !_NET_IF_H_ */ |