X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/b454c3ea9e19212a6333dbc8463e4e9f25c0ad65..dd70a7d6ef08e95a9ce58964a17dfc668962ec4c:/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 572929b963..dca1d80f4c 100644
--- a/usr/src/sys/net/if_loop.c
+++ b/usr/src/sys/net/if_loop.c
@@ -1,25 +1,55 @@
-/*	if_loop.c	4.3	81/12/03	*/
+/*
+ * 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 the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, 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'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *	@(#)if_loop.c	7.5 (Berkeley) %G%
+ */
 
 /*
  * 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 "param.h"
+#include "systm.h"
+#include "mbuf.h"
+#include "socket.h"
+#include "errno.h"
+#include "ioctl.h"
+
 #include "../net/if.h"
-#include "../net/ip.h"
-#include "../net/ip_var.h"
-#include "../h/mtpr.h"
+#include "../net/netisr.h"
+#include "../net/route.h"
+
+#include "../machine/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
+#include "../netns/ns.h"
+#include "../netns/ns_if.h"
+#endif
 
-#define	LONET	254
-#define	LOMTU	1024
+#define	LOMTU	(1024+512)
 
 struct	ifnet loif;
-int	looutput();
+int	looutput(), loioctl();
 
 loattach()
 {
@@ -27,36 +57,101 @@ loattach()
 
 	ifp->if_name = "lo";
 	ifp->if_mtu = LOMTU;
-	ifp->if_net = LONET;
-	ifp->if_addr = if_makeaddr(ifp->if_net, 0);
+	ifp->if_flags = IFF_LOOPBACK;
+	ifp->if_ioctl = loioctl;
 	ifp->if_output = looutput;
 	if_attach(ifp);
 }
 
-looutput(ifp, m0, pf)
+struct mbuf *Loop_Sanity;
+
+looutput(ifp, m, dst)
 	struct ifnet *ifp;
-	struct mbuf *m0;
-	int pf;
+	register struct mbuf *m;
+	struct sockaddr *dst;
 {
-	int s = splimp();
+	int s;
+	register struct ifqueue *ifq;
 
+	if ((m->m_flags & M_PKTHDR) == 0)
+		panic("looutput no HDR");
+	m->m_pkthdr.rcvif = ifp;
+
+{struct mbuf *mm; int mlen = 0;
+for (mm = m; m; m = m->m_next) /* XXX debugging code -- sklwoer */
+    mlen += m->m_len;
+m = mm;
+if (mlen != m->m_pkthdr.len) {
+	if (Loop_Sanity)
+		m_freem(Loop_Sanity);
+	Loop_Sanity = m_copy(m, 0, M_COPYALL);
+}
+}
+
+	s = splimp();
 	ifp->if_opackets++;
-	switch (pf) {
+	switch (dst->sa_family) {
 
 #ifdef INET
-	case PF_INET:
-		IF_ENQUEUE(&ipintrq, m0);
-		setipintr();
+	case AF_INET:
+		ifq = &ipintrq;
+		if (IF_QFULL(ifq)) {
+			IF_DROP(ifq);
+			m_freem(m);
+			splx(s);
+			return (ENOBUFS);
+		}
+		IF_ENQUEUE(ifq, m);
+		schednetisr(NETISR_IP);
+		break;
+#endif
+#ifdef NS
+	case AF_NS:
+		ifq = &nsintrq;
+		if (IF_QFULL(ifq)) {
+			IF_DROP(ifq);
+			m_freem(m);
+			splx(s);
+			return (ENOBUFS);
+		}
+		IF_ENQUEUE(ifq, m);
+		schednetisr(NETISR_NS);
 		break;
 #endif
-
 	default:
 		splx(s);
-		printf("lo%d: can't encapsulate pf%d\n", ifp->if_unit, pf);
-		m_freem(m0);
-		return (0);
+		printf("lo%d: can't handle af%d\n", ifp->if_unit,
+			dst->sa_family);
+		m_freem(m);
+		return (EAFNOSUPPORT);
 	}
 	ifp->if_ipackets++;
 	splx(s);
-	return (1);
+	return (0);
+}
+
+/*
+ * Process an ioctl request.
+ */
+/* ARGSUSED */
+loioctl(ifp, cmd, data)
+	register struct ifnet *ifp;
+	int cmd;
+	caddr_t data;
+{
+	int error = 0;
+
+	switch (cmd) {
+
+	case SIOCSIFADDR:
+		ifp->if_flags |= IFF_UP;
+		/*
+		 * Everything else is done at a higher level.
+		 */
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	return (error);
 }