BSD 4_3_Net_2 release

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

diff --git a/usr/src/sys/net/if_loop.c b/usr/src/sys/net/if_loop.c
index b01e4e5..5ec4aac 100644 (file)
--- a/usr/src/sys/net/if_loop.c
+++ b/usr/src/sys/net/if_loop.c
@@ -1,9 +1,36 @@
 /*
 /*

- * Copyright (c) 1982 Regents of the University of California.
- * All rights reserved.  The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.

  *
  *

- *     @(#)if_loop.c   6.6 (Berkeley) %G%
+ * 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_loop.c   7.13 (Berkeley) 4/26/91

  */
 
 /*
  */
 
 /*


@@ -18,16 +45,17 @@
 #include "ioctl.h"
 
 #include "../net/if.h"
 #include "ioctl.h"
 
 #include "../net/if.h"

+#include "../net/if_types.h"

 #include "../net/netisr.h"
 #include "../net/route.h"
 
 #include "../net/netisr.h"
 #include "../net/route.h"
 

-#include "in.h"
-#include "in_systm.h"
-#include "ip.h"
-#include "ip_var.h"
+#include "machine/mtpr.h"

 
 

-#ifdef vax
-#include "../vax/mtpr.h"
+#ifdef INET
+#include "../netinet/in.h"
+#include "../netinet/in_systm.h"
+#include "../netinet/in_var.h"
+#include "../netinet/ip.h"

 #endif
 
 #ifdef NS
 #endif
 
 #ifdef NS


@@ -35,6 +63,11 @@
 #include "../netns/ns_if.h"
 #endif
 
 #include "../netns/ns_if.h"
 #endif
 

+#ifdef ISO
+#include "../netiso/iso.h"
+#include "../netiso/iso_var.h"
+#endif
+

 #define        LOMTU   (1024+512)
 
 struct ifnet loif;
 #define        LOMTU   (1024+512)
 
 struct ifnet loif;


@@ -43,64 +76,87 @@ int looutput(), loioctl();
 loattach()
 {
        register struct ifnet *ifp = &loif;
 loattach()
 {
        register struct ifnet *ifp = &loif;

-       register struct sockaddr_in *sin;

 
        ifp->if_name = "lo";
        ifp->if_mtu = LOMTU;
 
        ifp->if_name = "lo";
        ifp->if_mtu = LOMTU;

+       ifp->if_flags = IFF_LOOPBACK;

        ifp->if_ioctl = loioctl;
        ifp->if_output = looutput;
        ifp->if_ioctl = loioctl;
        ifp->if_output = looutput;

+       ifp->if_type = IFT_LOOP;
+       ifp->if_hdrlen = 0;
+       ifp->if_addrlen = 0;

        if_attach(ifp);
 }
 
        if_attach(ifp);
 }
 

-looutput(ifp, m0, dst)
+looutput(ifp, m, dst, rt)

        struct ifnet *ifp;
        struct ifnet *ifp;

-       struct mbuf *m0;
+       register struct mbuf *m;

        struct sockaddr *dst;
        struct sockaddr *dst;

+       register struct rtentry *rt;

 {
 {

-       int s = splimp();
-       register struct ifqueue *ifq;
+       int s, isr;
+       register struct ifqueue *ifq = 0;

 
 

+       if ((m->m_flags & M_PKTHDR) == 0)
+               panic("looutput no HDR");
+       m->m_pkthdr.rcvif = ifp;
+
+       if (rt && rt->rt_flags & RTF_REJECT) {
+               m_freem(m);
+               return (rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
+       }

        ifp->if_opackets++;
        ifp->if_opackets++;

+       ifp->if_obytes += m->m_pkthdr.len;

        switch (dst->sa_family) {
 
 #ifdef INET
        case AF_INET:
                ifq = &ipintrq;
        switch (dst->sa_family) {
 
 #ifdef INET
        case AF_INET:
                ifq = &ipintrq;

-               if (IF_QFULL(ifq)) {
-                       IF_DROP(ifq);
-                       m_freem(m0);
-                       splx(s);
-                       return (ENOBUFS);
-               }
-               IF_ENQUEUE(ifq, m0);
-               schednetisr(NETISR_IP);
+               isr = NETISR_IP;

                break;
 #endif
 #ifdef NS
        case AF_NS:
                ifq = &nsintrq;
                break;
 #endif
 #ifdef NS
        case AF_NS:
                ifq = &nsintrq;

-               if (IF_QFULL(ifq)) {
-                       IF_DROP(ifq);
-                       m_freem(m0);
-                       splx(s);
-                       return (ENOBUFS);
-               }
-               IF_ENQUEUE(ifq, m0);
-               schednetisr(NETISR_NS);
+               isr = NETISR_NS;
+               break;
+#endif
+#ifdef ISO
+       case AF_ISO:
+               ifq = &clnlintrq;
+               isr = NETISR_ISO;

                break;
 #endif
        default:
                break;
 #endif
        default:

-               splx(s);

                printf("lo%d: can't handle af%d\n", ifp->if_unit,
                        dst->sa_family);
                printf("lo%d: can't handle af%d\n", ifp->if_unit,
                        dst->sa_family);

-               m_freem(m0);
+               m_freem(m);

                return (EAFNOSUPPORT);
        }
                return (EAFNOSUPPORT);
        }

+       s = splimp();
+       if (IF_QFULL(ifq)) {
+               IF_DROP(ifq);
+               m_freem(m);
+               splx(s);
+               return (ENOBUFS);
+       }
+       IF_ENQUEUE(ifq, m);
+       schednetisr(isr);

        ifp->if_ipackets++;
        ifp->if_ipackets++;

+       ifp->if_ibytes += m->m_pkthdr.len;

        splx(s);
        return (0);
 }
 
        splx(s);
        return (0);
 }
 

+/* ARGSUSED */
+lortrequest(cmd, rt, sa)
+struct rtentry *rt;
+struct sockaddr *sa;
+{
+       if (rt)
+               rt->rt_rmx.rmx_mtu = LOMTU;
+}
+

 /*
  * Process an ioctl request.
  */
 /*
  * Process an ioctl request.
  */


@@ -110,12 +166,16 @@ loioctl(ifp, cmd, data)
        int cmd;
        caddr_t data;
 {
        int cmd;
        caddr_t data;
 {

+       register struct ifaddr *ifa;

        int error = 0;
 
        switch (cmd) {
 
        case SIOCSIFADDR:
                ifp->if_flags |= IFF_UP;
        int error = 0;
 
        switch (cmd) {
 
        case SIOCSIFADDR:
                ifp->if_flags |= IFF_UP;

+               ifa = (struct ifaddr *)data;
+               if (ifa != 0 && ifa->ifa_addr->sa_family == AF_ISO)
+                       ifa->ifa_rtrequest = lortrequest;

                /*
                 * Everything else is done at a higher level.
                 */
                /*
                 * Everything else is done at a higher level.
                 */