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 8dd37fd..16912e0 100644 (file)
--- a/usr/src/sys/net/if_loop.c
+++ b/usr/src/sys/net/if_loop.c
@@ -1,59 +1,213 @@
-/*     if_loop.c       4.1     81/11/29        */
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.
+ *
+ * %sccs.include.redist.c%
+ *
+ *     @(#)if_loop.c   7.19 (Berkeley) %G%
+ */

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

-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/mbuf.h"
-#include "../h/socket.h"
-#include "../net/in.h"
-#include "../net/in_systm.h"
-#include "../net/if.h"
-#include "../net/ip.h"
-#include "../net/ip_var.h"
-#include "../h/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>

 
 

-#define        LONET   254
-#define        LOMTU   1024
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#endif
+
+#ifdef NS
+#include <netns/ns.h>
+#include <netns/ns_if.h>
+#endif
+
+#ifdef ISO
+#include <netiso/iso.h>
+#include <netiso/iso_var.h>
+#endif
+
+#include "bpfilter.h"
+
+#define        LOMTU   (1024+512)

 
 struct ifnet loif;
 
 struct ifnet loif;

-int    looutput();
+int    looutput(), loioctl();

 
 loattach()
 {
        register struct ifnet *ifp = &loif;
 
 
 loattach()
 {
        register struct ifnet *ifp = &loif;
 

+       ifp->if_name = "lo";

        ifp->if_mtu = LOMTU;
        ifp->if_mtu = LOMTU;

-       ifp->if_net = LONET;
+       ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
+       ifp->if_ioctl = loioctl;

        ifp->if_output = looutput;
        ifp->if_output = looutput;

-       ifp->if_next = ifnet;
-       ifnet = ifp;
+       ifp->if_type = IFT_LOOP;
+       ifp->if_hdrlen = 0;
+       ifp->if_addrlen = 0;
+       if_attach(ifp);
+#if NBPFILTER > 0
+       bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
+#endif

 }
 
 }
 

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

        struct ifnet *ifp;
        struct ifnet *ifp;

-       struct mbuf *m0;
-       int pf;
+       register struct mbuf *m;
+       struct sockaddr *dst;
+       register struct rtentry *rt;

 {
 {

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

 
 

-       switch (pf) {
+       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);
+       }
+       ifp->if_opackets++;
+       ifp->if_obytes += m->m_pkthdr.len;
+       switch (dst->sa_family) {

 
 #ifdef INET
 
 #ifdef INET

-       case PF_INET:
-               IF_ENQUEUE(&ipintrq, m0);
-               setipintr();
+       case AF_INET:
+               ifq = &ipintrq;
+               isr = NETISR_IP;
+               break;
+#endif
+#ifdef NS
+       case AF_NS:
+               ifq = &nsintrq;
+               isr = NETISR_NS;
+               break;
+#endif
+#ifdef ISO
+       case AF_ISO:
+               ifq = &clnlintrq;
+               isr = NETISR_ISO;

                break;
 #endif
                break;
 #endif

-

        default:
        default:

+               printf("lo%d: can't handle af%d\n", ifp->if_unit,
+                       dst->sa_family);
+               m_freem(m);
+               return (EAFNOSUPPORT);
+       }
+       s = splimp();
+       if (IF_QFULL(ifq)) {
+               IF_DROP(ifq);
+               m_freem(m);

                splx(s);
                splx(s);

-               printf("lo%d: can't encapsulate pf%d\n", ifp->if_unit, pf);
-               m_freem(m0);
-               return (0);
+               return (ENOBUFS);

        }
        }

+       IF_ENQUEUE(ifq, m);
+       schednetisr(isr);
+       ifp->if_ipackets++;
+       ifp->if_ibytes += m->m_pkthdr.len;

        splx(s);
        splx(s);

-       return (1);
+       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.
+ */
+/* ARGSUSED */
+loioctl(ifp, cmd, data)
+       register struct ifnet *ifp;
+       int cmd;
+       caddr_t data;
+{
+       register struct ifaddr *ifa;
+       register struct ifreq *ifr;
+       register 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.
+                */
+               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;
+       }
+       return (error);

 }
 }