add disklabel.5

[unix-history] / usr / src / sbin / routed / inet.c

diff --git a/usr/src/sbin/routed/inet.c b/usr/src/sbin/routed/inet.c
index a83e7db..ab32ac8 100644 (file)
--- a/usr/src/sbin/routed/inet.c
+++ b/usr/src/sbin/routed/inet.c
@@ -1,6 +1,24 @@
+/*
+ * Copyright (c) 1983 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.
+ */
+

 #ifndef lint
 #ifndef lint

-static char *sccsid[] = "@(#)inet.c    4.3 (Berkeley) %G%";
-#endif
+static char sccsid[] = "@(#)inet.c     5.7 (Berkeley) %G%";
+#endif /* not lint */
+

 /*
  * Temporarily, copy these routines from the kernel,
  * as we need to know about subnets.
 /*
  * Temporarily, copy these routines from the kernel,
  * as we need to know about subnets.


@@ -93,3 +111,88 @@ inet_lnaof(in)
                        return (host &~ ifp->int_subnetmask);
        return (host);
 }
                        return (host &~ ifp->int_subnetmask);
        return (host);
 }

+
+/*
+ * Return RTF_HOST if the address is
+ * for an Internet host, RTF_SUBNET for a subnet,
+ * 0 for a network.
+ */
+inet_rtflags(sin)
+       struct sockaddr_in *sin;
+{
+       register u_long i = ntohl(sin->sin_addr.s_addr);
+       register u_long net, host;
+       register struct interface *ifp;
+
+       if (IN_CLASSA(i)) {
+               net = i & IN_CLASSA_NET;
+               host = i & IN_CLASSA_HOST;
+       } else if (IN_CLASSB(i)) {
+               net = i & IN_CLASSB_NET;
+               host = i & IN_CLASSB_HOST;
+       } else {
+               net = i & IN_CLASSC_NET;
+               host = i & IN_CLASSC_HOST;
+       }
+
+       /*
+        * Check whether this network is subnetted;
+        * if so, check whether this is a subnet or a host.
+        */
+       for (ifp = ifnet; ifp; ifp = ifp->int_next)
+               if (net == ifp->int_net) {
+                       if (host &~ ifp->int_subnetmask)
+                               return (RTF_HOST);
+                       else if (ifp->int_subnetmask != ifp->int_netmask)
+                               return (RTF_SUBNET);
+                       else
+                               return (0);             /* network */
+               }
+       if (host == 0)
+               return (0);     /* network */
+       else
+               return (RTF_HOST);
+}
+
+/*
+ * Return true if a route to subnet/host of route rt should be sent to dst.
+ * Send it only if dst is on the same logical network if not "internal",
+ * otherwise only if the route is the "internal" route for the logical net.
+ */
+inet_sendroute(rt, dst)
+       struct rt_entry *rt;
+       struct sockaddr_in *dst;
+{
+       register u_long r =
+           ntohl(((struct sockaddr_in *)&rt->rt_dst)->sin_addr.s_addr);
+       register u_long d = ntohl(dst->sin_addr.s_addr);
+
+       if (IN_CLASSA(r)) {
+               if ((r & IN_CLASSA_NET) == (d & IN_CLASSA_NET)) {
+                       if ((r & IN_CLASSA_HOST) == 0)
+                               return ((rt->rt_state & RTS_INTERNAL) == 0);
+                       return (1);
+               }
+               if (r & IN_CLASSA_HOST)
+                       return (0);
+               return ((rt->rt_state & RTS_INTERNAL) != 0);
+       } else if (IN_CLASSB(r)) {
+               if ((r & IN_CLASSB_NET) == (d & IN_CLASSB_NET)) {
+                       if ((r & IN_CLASSB_HOST) == 0)
+                               return ((rt->rt_state & RTS_INTERNAL) == 0);
+                       return (1);
+               }
+               if (r & IN_CLASSB_HOST)
+                       return (0);
+               return ((rt->rt_state & RTS_INTERNAL) != 0);
+       } else {
+               if ((r & IN_CLASSC_NET) == (d & IN_CLASSC_NET)) {
+                       if ((r & IN_CLASSC_HOST) == 0)
+                               return ((rt->rt_state & RTS_INTERNAL) == 0);
+                       return (1);
+               }
+               if (r & IN_CLASSC_HOST)
+                       return (0);
+               return ((rt->rt_state & RTS_INTERNAL) != 0);
+       }
+}