date and time created 88/03/25 17:38:10 by marc

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

diff --git a/usr/src/sys/net/if.c b/usr/src/sys/net/if.c
index dada466..c04bff6 100644 (file)
--- a/usr/src/sys/net/if.c
+++ b/usr/src/sys/net/if.c
@@ -1,21 +1,40 @@
-/*     if.c    4.12    82/03/30        */
+/*
+ * Copyright (c) 1980, 1986 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of California at Berkeley. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ *
+ *     @(#)if.c        7.2 (Berkeley) %G%
+ */
+
+#include "param.h"
+#include "systm.h"
+#include "socket.h"
+#include "socketvar.h"
+#include "protosw.h"
+#include "dir.h"
+#include "user.h"
+#include "kernel.h"
+#include "ioctl.h"
+#include "errno.h"

 
 

-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/socket.h"
-#include "../net/in.h"
-#include "../net/in_systm.h"
-#include "../net/if.h"
-#include "../net/af.h"
+#include "if.h"
+#include "af.h"
+
+#include "ether.h"

 
 int    ifqmaxlen = IFQ_MAXLEN;
 
 /*
  * Network interface utility routines.
  *
 
 int    ifqmaxlen = IFQ_MAXLEN;
 
 /*
  * Network interface utility routines.
  *

- * Routines with if_ifwith* names take sockaddr *'s as
- * parameters.  Other routines take value parameters,
- * e.g. if_ifwithnet takes the network number.
+ * Routines with ifa_ifwith* names take sockaddr *'s as
+ * parameters.

  */
 
 ifinit()
  */
 
 ifinit()


@@ -23,13 +42,12 @@ ifinit()
        register struct ifnet *ifp;
 
        for (ifp = ifnet; ifp; ifp = ifp->if_next)
        register struct ifnet *ifp;
 
        for (ifp = ifnet; ifp; ifp = ifp->if_next)

-               if (ifp->if_init) {
-                       (*ifp->if_init)(ifp->if_unit);
-                       if (ifp->if_snd.ifq_maxlen == 0)
-                               ifp->if_snd.ifq_maxlen = ifqmaxlen;
-               }
+               if (ifp->if_snd.ifq_maxlen == 0)
+                       ifp->if_snd.ifq_maxlen = ifqmaxlen;
+       if_slowtimo();

 }
 
 }
 

+#ifdef vax

 /*
  * Call each interface on a Unibus reset.
  */
 /*
  * Call each interface on a Unibus reset.
  */


@@ -39,9 +57,10 @@ ifubareset(uban)
        register struct ifnet *ifp;
 
        for (ifp = ifnet; ifp; ifp = ifp->if_next)
        register struct ifnet *ifp;
 
        for (ifp = ifnet; ifp; ifp = ifp->if_next)

-               if (ifp->if_ubareset)
-                       (*ifp->if_ubareset)(uban);
+               if (ifp->if_reset)
+                       (*ifp->if_reset)(ifp->if_unit, uban);

 }
 }

+#endif

 
 /*
  * Attach an interface to the
 
 /*
  * Attach an interface to the


@@ -52,7 +71,6 @@ if_attach(ifp)
 {
        register struct ifnet **p = &ifnet;
 
 {
        register struct ifnet **p = &ifnet;
 

-COUNT(IF_ATTACH);

        while (*p)
                p = &((*p)->if_next);
        *p = ifp;
        while (*p)
                p = &((*p)->if_next);
        *p = ifp;


@@ -62,115 +80,263 @@ COUNT(IF_ATTACH);
  * Locate an interface based on a complete address.
  */
 /*ARGSUSED*/
  * Locate an interface based on a complete address.
  */
 /*ARGSUSED*/

-struct ifnet *
-if_ifwithaddr(addr)
+struct ifaddr *
+ifa_ifwithaddr(addr)

        struct sockaddr *addr;
 {
        register struct ifnet *ifp;
        struct sockaddr *addr;
 {
        register struct ifnet *ifp;

+       register struct ifaddr *ifa;

 
 

-COUNT(IF_IFWITHADDR);

 #define        equal(a1, a2) \
        (bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 14) == 0)
 #define        equal(a1, a2) \
        (bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 14) == 0)

-       for (ifp = ifnet; ifp; ifp = ifp->if_next) {
-               if (ifp->if_addr.sa_family != addr->sa_family)
+       for (ifp = ifnet; ifp; ifp = ifp->if_next)
+           for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+               if (ifa->ifa_addr.sa_family != addr->sa_family)

                        continue;
                        continue;

-               if (equal(&ifp->if_addr, addr))
-                       break;
+               if (equal(&ifa->ifa_addr, addr))
+                       return (ifa);

                if ((ifp->if_flags & IFF_BROADCAST) &&
                if ((ifp->if_flags & IFF_BROADCAST) &&

-                   equal(&ifp->if_broadaddr, addr))
-                       break;
+                   equal(&ifa->ifa_broadaddr, addr))
+                       return (ifa);

        }
        }

-       return (ifp);
+       return ((struct ifaddr *)0);
+}
+/*
+ * Locate the point to point interface with a given destination address.
+ */
+/*ARGSUSED*/
+struct ifaddr *
+ifa_ifwithdstaddr(addr)
+       struct sockaddr *addr;
+{
+       register struct ifnet *ifp;
+       register struct ifaddr *ifa;
+
+       for (ifp = ifnet; ifp; ifp = ifp->if_next) 
+           if (ifp->if_flags & IFF_POINTOPOINT)
+               for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+                       if (ifa->ifa_addr.sa_family != addr->sa_family)
+                               continue;
+                       if (equal(&ifa->ifa_dstaddr, addr))
+                               return (ifa);
+       }
+       return ((struct ifaddr *)0);

 }
 
 /*
  * Find an interface on a specific network.  If many, choice
  * is first found.
  */
 }
 
 /*
  * Find an interface on a specific network.  If many, choice
  * is first found.
  */

-struct ifnet *
-if_ifwithnet(addr)
+struct ifaddr *
+ifa_ifwithnet(addr)

        register struct sockaddr *addr;
 {
        register struct ifnet *ifp;
        register struct sockaddr *addr;
 {
        register struct ifnet *ifp;

-       register int af = addr->sa_family;
-       register int (*netmatch)() = afswitch[af].af_netmatch;
+       register struct ifaddr *ifa;
+       register u_int af = addr->sa_family;
+       register int (*netmatch)();

 
 

-       for (ifp = ifnet; ifp; ifp = ifp->if_next) {
-               if (af != ifp->if_addr.sa_family)
+       if (af >= AF_MAX)
+               return (0);
+       netmatch = afswitch[af].af_netmatch;
+       for (ifp = ifnet; ifp; ifp = ifp->if_next)
+           for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+               if (ifa->ifa_addr.sa_family != addr->sa_family)

                        continue;
                        continue;

-               if ((*netmatch)(addr, &ifp->if_addr))
-                       break;
+               if ((*netmatch)(&ifa->ifa_addr, addr))
+                       return (ifa);

        }
        }

-       return (ifp);
+       return ((struct ifaddr *)0);

 }
 
 }
 

+#ifdef notdef

 /*
 /*

- * As above, but parameter is network number.
+ * Find an interface using a specific address family

  */
  */

-struct ifnet *
-if_ifonnetof(net)
-       register int net;
+struct ifaddr *
+ifa_ifwithaf(af)
+       register int af;

 {
        register struct ifnet *ifp;
 {
        register struct ifnet *ifp;

+       register struct ifaddr *ifa;

 
        for (ifp = ifnet; ifp; ifp = ifp->if_next)
 
        for (ifp = ifnet; ifp; ifp = ifp->if_next)

-               if (ifp->if_net == net)
-                       break;
-       return (ifp);
+           for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
+               if (ifa->ifa_addr.sa_family == af)
+                       return (ifa);
+       return ((struct ifaddr *)0);

 }
 }

+#endif

 
 /*
 
 /*

- * Find an interface using a specific address family
+ * Mark an interface down and notify protocols of
+ * the transition.
+ * NOTE: must be called at splnet or eqivalent.
+ */
+if_down(ifp)
+       register struct ifnet *ifp;
+{
+       register struct ifaddr *ifa;
+
+       ifp->if_flags &= ~IFF_UP;
+       for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
+               pfctlinput(PRC_IFDOWN, &ifa->ifa_addr);
+}
+
+/*
+ * Handle interface watchdog timer routines.  Called
+ * from softclock, we decrement timers (if set) and
+ * call the appropriate interface routine on expiration.
+ */
+if_slowtimo()
+{
+       register struct ifnet *ifp;
+
+       for (ifp = ifnet; ifp; ifp = ifp->if_next) {
+               if (ifp->if_timer == 0 || --ifp->if_timer)
+                       continue;
+               if (ifp->if_watchdog)
+                       (*ifp->if_watchdog)(ifp->if_unit);
+       }
+       timeout(if_slowtimo, (caddr_t)0, hz / IFNET_SLOWHZ);
+}
+
+/*
+ * Map interface name to
+ * interface structure pointer.

  */
 struct ifnet *
  */
 struct ifnet *

-if_ifwithaf(af)
-       register int af;
+ifunit(name)
+       register char *name;

 {
 {

+       register char *cp;

        register struct ifnet *ifp;
        register struct ifnet *ifp;

+       int unit;

 
 

-       for (ifp = ifnet; ifp; ifp = ifp->if_next)
-               if (ifp->if_addr.sa_family == af)
+       for (cp = name; cp < name + IFNAMSIZ && *cp; cp++)
+               if (*cp >= '0' && *cp <= '9')
+                       break;
+       if (*cp == '\0' || cp == name + IFNAMSIZ)
+               return ((struct ifnet *)0);
+       unit = *cp - '0';
+       for (ifp = ifnet; ifp; ifp = ifp->if_next) {
+               if (bcmp(ifp->if_name, name, (unsigned)(cp - name)))
+                       continue;
+               if (unit == ifp->if_unit)

                        break;
                        break;

+       }

        return (ifp);
 }
 
 /*
        return (ifp);
 }
 
 /*

- * Formulate an Internet address from network + host.  Used in
- * building addresses stored in the ifnet structure.
+ * Interface ioctls.

  */
  */

-struct in_addr
-if_makeaddr(net, host)
-       int net, host;
+ifioctl(so, cmd, data)
+       struct socket *so;
+       int cmd;
+       caddr_t data;

 {
 {

-       u_long addr;
-
-       if (net < 128)
-               addr = (net << 24) | host;
-       else if (net < 65536)
-               addr = (net << 16) | host;
-       else
-               addr = (net << 8) | host;
-#ifdef vax
-       addr = htonl(addr);
+       register struct ifnet *ifp;
+       register struct ifreq *ifr;
+
+       switch (cmd) {
+
+       case SIOCGIFCONF:
+               return (ifconf(cmd, data));
+
+#if defined(INET) && NETHER > 0
+       case SIOCSARP:
+       case SIOCDARP:
+               if (!suser())
+                       return (u.u_error);
+               /* FALL THROUGH */
+       case SIOCGARP:
+               return (arpioctl(cmd, data));

 #endif
 #endif

-       return (*(struct in_addr *)&addr);
+       }
+       ifr = (struct ifreq *)data;
+       ifp = ifunit(ifr->ifr_name);
+       if (ifp == 0)
+               return (ENXIO);
+       switch (cmd) {
+
+       case SIOCGIFFLAGS:
+               ifr->ifr_flags = ifp->if_flags;
+               break;
+
+       case SIOCGIFMETRIC:
+               ifr->ifr_metric = ifp->if_metric;
+               break;
+
+       case SIOCSIFFLAGS:
+               if (!suser())
+                       return (u.u_error);
+               if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
+                       int s = splimp();
+                       if_down(ifp);
+                       splx(s);
+               }
+               ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
+                       (ifr->ifr_flags &~ IFF_CANTCHANGE);
+               if (ifp->if_ioctl)
+                       (void) (*ifp->if_ioctl)(ifp, cmd, data);
+               break;
+
+       case SIOCSIFMETRIC:
+               if (!suser())
+                       return (u.u_error);
+               ifp->if_metric = ifr->ifr_metric;
+               break;
+
+       default:
+               if (so->so_proto == 0)
+                       return (EOPNOTSUPP);
+               return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
+                       cmd, data, ifp));
+       }
+       return (0);

 }
 
 /*
 }
 
 /*

- * Initialize an interface's routing
- * table entry according to the network.
- * INTERNET SPECIFIC.
+ * Return interface configuration
+ * of system.  List may be used
+ * in later ioctl's (above) to get
+ * other information.

  */
  */

-if_rtinit(ifp, flags)
-       register struct ifnet *ifp;
-       int flags;
+/*ARGSUSED*/
+ifconf(cmd, data)
+       int cmd;
+       caddr_t data;

 {
 {

-       struct sockaddr_in sin;
-
-       if (ifp->if_flags & IFF_ROUTE)
-               return;
-       bzero((caddr_t)&sin, sizeof (sin));
-       sin.sin_family = AF_INET;
-       sin.sin_addr = if_makeaddr(ifp->if_net, 0);
-       rtinit(&sin, &sin, flags);
+       register struct ifconf *ifc = (struct ifconf *)data;
+       register struct ifnet *ifp = ifnet;
+       register struct ifaddr *ifa;
+       register char *cp, *ep;
+       struct ifreq ifr, *ifrp;
+       int space = ifc->ifc_len, error = 0;
+
+       ifrp = ifc->ifc_req;
+       ep = ifr.ifr_name + sizeof (ifr.ifr_name) - 2;
+       for (; space > sizeof (ifr) && ifp; ifp = ifp->if_next) {
+               bcopy(ifp->if_name, ifr.ifr_name, sizeof (ifr.ifr_name) - 2);
+               for (cp = ifr.ifr_name; cp < ep && *cp; cp++)
+                       ;
+               *cp++ = '0' + ifp->if_unit; *cp = '\0';
+               if ((ifa = ifp->if_addrlist) == 0) {
+                       bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
+                       error = copyout((caddr_t)&ifr, (caddr_t)ifrp, sizeof (ifr));
+                       if (error)
+                               break;
+                       space -= sizeof (ifr), ifrp++;
+               } else 
+                   for ( ; space > sizeof (ifr) && ifa; ifa = ifa->ifa_next) {
+                       ifr.ifr_addr = ifa->ifa_addr;
+                       error = copyout((caddr_t)&ifr, (caddr_t)ifrp, sizeof (ifr));
+                       if (error)
+                               break;
+                       space -= sizeof (ifr), ifrp++;
+               }
+       }
+       ifc->ifc_len -= space;
+       return (error);

 }
 }