BSD 4_3 release

[unix-history] / usr / src / sys / net / if.h

diff --git a/usr/src/sys/net/if.h b/usr/src/sys/net/if.h
index 5913990..5a0cc23 100644 (file)
--- a/usr/src/sys/net/if.h
+++ b/usr/src/sys/net/if.h
@@ -1,4 +1,10 @@
-/*     if.h    4.5     81/12/02        */
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *     @(#)if.h        7.1 (Berkeley) 6/4/86
+ */

 
 /*
  * Structures defining a network interface, providing a packet
 
 /*
  * Structures defining a network interface, providing a packet


@@ -9,21 +15,20 @@
  * received from its medium.
  *
  * Output occurs when the routine if_output is called, with three parameters:
  * received from its medium.
  *
  * Output occurs when the routine if_output is called, with three parameters:

- *     (*ifp->if_output)(ifp, m, pf)
- * Here m is the mbuf chain to be sent and pf is the protocol family
- * of the internetwork datagram format in which the data is wrapped
- * (e.g. PF_PUP or PF_INET).  The output routine encapsulates the
- * supplied datagram if necessary, and then transmits it on its medium.
+ *     (*ifp->if_output)(ifp, m, dst)
+ * 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.
  *
  *
  * 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 internet addresses
+ * 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
  * 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 ip_ggp.c.
+ * interfaces.  These routines live in the files if.c and route.c

  */
 
 /*
  */
 
 /*


@@ -32,33 +37,58 @@
  * (Would like to call this struct ``if'', but C isn't PL/1.)
  */
 struct ifnet {
  * (Would like to call this struct ``if'', but C isn't PL/1.)
  */
 struct ifnet {

+       char    *if_name;               /* name, e.g. ``en'' or ``lo'' */

        short   if_unit;                /* sub-unit for lower level driver */
        short   if_mtu;                 /* maximum transmission unit */
        short   if_unit;                /* sub-unit for lower level driver */
        short   if_mtu;                 /* maximum transmission unit */

-       short   if_net;                 /* network number of interface */
-       int     if_host[2];             /* local net host number */
-       struct  in_addr if_addr;        /* internet address of interface */
+       short   if_flags;               /* up/down, broadcast, etc. */
+       short   if_timer;               /* time 'til if_watchdog called */
+       int     if_metric;              /* routing metric (external only) */
+       struct  ifaddr *if_addrlist;    /* linked list of addresses per if */

        struct  ifqueue {
                struct  mbuf *ifq_head;
                struct  mbuf *ifq_tail;
        struct  ifqueue {
                struct  mbuf *ifq_head;
                struct  mbuf *ifq_tail;

+               int     ifq_len;
+               int     ifq_maxlen;
+               int     ifq_drops;

        } if_snd;                       /* output queue */
 /* procedure handles */
        int     (*if_init)();           /* init routine */
        int     (*if_output)();         /* output routine */
        } if_snd;                       /* output queue */
 /* procedure handles */
        int     (*if_init)();           /* init routine */
        int     (*if_output)();         /* output routine */

-       int     (*if_ubareset)();       /* uba reset routine */
+       int     (*if_ioctl)();          /* ioctl routine */
+       int     (*if_reset)();          /* bus reset routine */
+       int     (*if_watchdog)();       /* timer routine */

 /* generic interface statistics */
 /* generic interface statistics */

+       int     if_ipackets;            /* packets received on interface */
+       int     if_ierrors;             /* input errors on interface */
+       int     if_opackets;            /* packets sent on interface */
+       int     if_oerrors;             /* output errors on interface */

        int     if_collisions;          /* collisions on csma interfaces */
        int     if_collisions;          /* collisions on csma interfaces */

-       int     if_ierrors;             /* input errors */
-       int     if_oerrors;             /* output errors */

 /* end statistics */
        struct  ifnet *if_next;
 };
 
 /* end statistics */
        struct  ifnet *if_next;
 };
 

+#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 */
+/* next two not supported now, but reserved: */
+#define        IFF_PROMISC     0x100           /* receive all packets */
+#define        IFF_ALLMULTI    0x200           /* receive all multicast packets */
+/* flags set internally only: */
+#define        IFF_CANTCHANGE  (IFF_BROADCAST | IFF_POINTOPOINT | IFF_RUNNING)
+

 /*
  * 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().
  */
 /*
  * 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_act = 0; \
        if ((ifq)->ifq_tail == 0) \
 #define        IF_ENQUEUE(ifq, m) { \
        (m)->m_act = 0; \
        if ((ifq)->ifq_tail == 0) \


@@ -66,6 +96,40 @@ struct ifnet {
        else \
                (ifq)->ifq_tail->m_act = m; \
        (ifq)->ifq_tail = m; \
        else \
                (ifq)->ifq_tail->m_act = m; \
        (ifq)->ifq_tail = m; \

+       (ifq)->ifq_len++; \
+}
+#define        IF_PREPEND(ifq, m) { \
+       (m)->m_act = (ifq)->ifq_head; \
+       if ((ifq)->ifq_tail == 0) \
+               (ifq)->ifq_tail = (m); \
+       (ifq)->ifq_head = (m); \
+       (ifq)->ifq_len++; \
+}
+/*
+ * Packets destined for level-1 protocol input routines
+ * have a pointer to the receiving interface prepended to the data.
+ * IF_DEQUEUEIF extracts and returns this pointer when dequeueing the packet.
+ * IF_ADJ should be used otherwise to adjust for its presence.
+ */
+#define        IF_ADJ(m) { \
+       (m)->m_off += sizeof(struct ifnet *); \
+       (m)->m_len -= sizeof(struct ifnet *); \
+       if ((m)->m_len == 0) { \
+               struct mbuf *n; \
+               MFREE((m), n); \
+               (m) = n; \
+       } \
+}
+#define        IF_DEQUEUEIF(ifq, m, ifp) { \
+       (m) = (ifq)->ifq_head; \
+       if (m) { \
+               if (((ifq)->ifq_head = (m)->m_act) == 0) \
+                       (ifq)->ifq_tail = 0; \
+               (m)->m_act = 0; \
+               (ifq)->ifq_len--; \
+               (ifp) = *(mtod((m), struct ifnet **)); \
+               IF_ADJ(m); \
+       } \

 }
 #define        IF_DEQUEUE(ifq, m) { \
        (m) = (ifq)->ifq_head; \
 }
 #define        IF_DEQUEUE(ifq, m) { \
        (m) = (ifq)->ifq_head; \


@@ -73,15 +137,78 @@ struct ifnet {
                if (((ifq)->ifq_head = (m)->m_act) == 0) \
                        (ifq)->ifq_tail = 0; \
                (m)->m_act = 0; \
                if (((ifq)->ifq_head = (m)->m_act) == 0) \
                        (ifq)->ifq_tail = 0; \
                (m)->m_act = 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 */
+       union {
+               struct  sockaddr ifu_broadaddr;
+               struct  sockaddr ifu_dstaddr;
+       } ifa_ifu;
+#define        ifa_broadaddr   ifa_ifu.ifu_broadaddr   /* broadcast address */
+#define        ifa_dstaddr     ifa_ifu.ifu_dstaddr     /* other end of p-to-p link */
+       struct  ifnet *ifa_ifp;         /* back-pointer to interface */
+       struct  ifaddr *ifa_next;       /* next address for interface */
+};
+
+/*
+ * 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;
+               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_data        ifr_ifru.ifru_data      /* for use by interface */
+};
+
+/*
+ * 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 */
+};
+

 #ifdef KERNEL
 #ifdef KERNEL

-#ifdef INET
-struct ifqueue ipintrq;                /* ip packet input queue */
-#endif
+#include "../net/if_arp.h"

 struct ifqueue rawintrq;               /* raw packet input queue */
 struct ifnet *ifnet;
 struct ifqueue rawintrq;               /* raw packet input queue */
 struct ifnet *ifnet;

-struct ifnet *if_ifwithaddr(), *if_ifonnetof(), *if_gatewayfor();
-struct in_addr if_makeaddr();
-#endif
+struct ifaddr *ifa_ifwithaddr(), *ifa_ifwithnet();
+struct ifaddr *ifa_ifwithdstaddr();
+#else KERNEL
+#include <net/if_arp.h>
+#endif KERNEL