MULTICAST is now standard

[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 8ed8ed4..16912e0 100644 (file)
--- a/usr/src/sys/net/if_loop.c
+++ b/usr/src/sys/net/if_loop.c
@@ -2,45 +2,50 @@
  * Copyright (c) 1982, 1986 Regents of the University of California.
  * All rights reserved.
  *
  * Copyright (c) 1982, 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.
+ * %sccs.include.redist.c%

  *
  *

- *     @(#)if_loop.c   7.3 (Berkeley) %G%
+ *     @(#)if_loop.c   7.19 (Berkeley) %G%

  */
 
 /*
  * Loopback interface driver for protocol testing and timing.
  */
 
  */
 
 /*
  * Loopback interface driver for protocol testing and timing.
  */
 

-#include "param.h"
-#include "systm.h"
-#include "mbuf.h"
-#include "socket.h"
-#include "errno.h"
-#include "ioctl.h"
-
-#include "../net/if.h"
-#include "../net/netisr.h"
-#include "../net/route.h"
-
-#include "../machine/mtpr.h"
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <machine/cpu.h>
+
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/netisr.h>
+#include <net/route.h>
+#include <net/bpf.h>

 
 #ifdef INET
 
 #ifdef INET

-#include "../netinet/in.h"
-#include "../netinet/in_systm.h"
-#include "../netinet/in_var.h"
-#include "../netinet/ip.h"
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>

 #endif
 
 #ifdef NS
 #endif
 
 #ifdef NS

-#include "../netns/ns.h"
-#include "../netns/ns_if.h"
+#include <netns/ns.h>
+#include <netns/ns_if.h>

 #endif
 
 #endif
 

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

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


@@ -52,81 +57,110 @@ loattach()
 
        ifp->if_name = "lo";
        ifp->if_mtu = LOMTU;
 
        ifp->if_name = "lo";
        ifp->if_mtu = LOMTU;

-       ifp->if_flags = IFF_LOOPBACK;
+       ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;

        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);

+#if NBPFILTER > 0
+       bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
+#endif

 }
 
 }
 

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

        struct ifnet *ifp;
        struct ifnet *ifp;

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

        struct sockaddr *dst;
        struct sockaddr *dst;

+       register struct rtentry *rt;

 {
 {

-       int s;
-       register struct ifqueue *ifq;
-       struct mbuf *m;
-
-       /*
-        * Place interface pointer before the data
-        * for the receiving protocol.
-        */
-       if (m0->m_off <= MMAXOFF &&
-           m0->m_off >= MMINOFF + sizeof(struct ifnet *)) {
-               m0->m_off -= sizeof(struct ifnet *);
-               m0->m_len += sizeof(struct ifnet *);
-       } else {
-               MGET(m, M_DONTWAIT, MT_HEADER);
-               if (m == (struct mbuf *)0)
-                       return (ENOBUFS);
-               m->m_off = MMINOFF;
-               m->m_len = sizeof(struct ifnet *);
-               m->m_next = m0;
-               m0 = m;
+       int s, isr;
+       register struct ifqueue *ifq = 0;
+
+       if ((m->m_flags & M_PKTHDR) == 0)
+               panic("looutput no HDR");
+       ifp->if_lastchange = time;
+#if NBPFILTER > 0
+       if (loif.if_bpf) {
+               /*
+                * We need to prepend the address family as
+                * a four byte field.  Cons up a dummy header
+                * to pacify bpf.  This is safe because bpf
+                * will only read from the mbuf (i.e., it won't
+                * try to free it or keep a pointer a to it).
+                */
+               struct mbuf m0;
+               u_int af = dst->sa_family;
+
+               m0.m_next = m;
+               m0.m_len = 4;
+               m0.m_data = (char *)&af;
+               
+               bpf_mtap(loif.if_bpf, &m0);
+       }
+#endif
+       m->m_pkthdr.rcvif = ifp;
+
+       if (rt && rt->rt_flags & RTF_REJECT) {
+               m_freem(m);
+               return (rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);

        }
        }

-       *(mtod(m0, struct ifnet **)) = ifp;
-       s = splimp();

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

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


@@ -136,17 +170,42 @@ loioctl(ifp, cmd, data)
        int cmd;
        caddr_t data;
 {
        int cmd;
        caddr_t data;
 {

-       int error = 0;
+       register struct ifaddr *ifa;
+       register struct ifreq *ifr;
+       register int error = 0;

 
        switch (cmd) {
 
        case SIOCSIFADDR:
                ifp->if_flags |= IFF_UP;
 
        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.
                 */
                break;
 
                /*
                 * Everything else is done at a higher level.
                 */
                break;
 

+       case SIOCADDMULTI:
+       case SIOCDELMULTI:
+               ifr = (struct ifreq *)data;
+               if (ifr == 0) {
+                       error = EAFNOSUPPORT;           /* XXX */
+                       break;
+               }
+               switch (ifr->ifr_addr.sa_family) {
+
+#ifdef INET
+               case AF_INET:
+                       break;
+#endif
+
+               default:
+                       error = EAFNOSUPPORT;
+                       break;
+               }
+               break;
+

        default:
                error = EINVAL;
        }
        default:
                error = EINVAL;
        }