Only allow one arg to `delete' - the mask & gateway aren't necessary.

Delete AF_LINK routes as well as AF_INET.
Allow the word `default' as the arg to `delete' or in place of the
first two args (dest & netmask) to `add'.
Accept INTERFACE as the third arg to `add'.

  You can now say `add default interface' to create a default route
  through the tun interface.  It's reported that subsequent bind()s
  will bind to a broadcast address and not to the address currently
  assigned to the tun device - this is the first step towards
  supporting that first connection that was around from before the
  dynamic IP negotiation....

3 files changed, 125 insertions, 96 deletions

diff --git a/usr.sbin/ppp/command.c b/usr.sbin/ppp/command.c
index 002cc44f5db..efb3156c440 100644
--- a/usr.sbin/ppp/command.c
+++ b/usr.sbin/ppp/command.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: command.c,v 1.1 1997/11/23 20:27:33 brian Exp $
+ * $Id: command.c,v 1.2 1997/12/07 04:09:07 brian Exp $
  *
  */
 #include <sys/param.h>
@@ -1461,51 +1461,55 @@ static int
 AddCommand(struct cmdargs const *arg)
 {
   struct in_addr dest, gateway, netmask;
+  int gw;
 
-  if (arg->argc == 3) {
+  if (arg->argc != 3 && arg->argc != 2)
+    return -1;
+
+  if (arg->argc == 2)
+    if (strcasecmp(arg->argv[0], "default"))
+      return -1;
+    else {
+      dest.s_addr = netmask.s_addr = INADDR_ANY;
+      gw = 1;
+    }
+  else {
     if (strcasecmp(arg->argv[0], "MYADDR") == 0)
       dest = IpcpInfo.want_ipaddr;
     else
       dest = GetIpAddr(arg->argv[0]);
     netmask = GetIpAddr(arg->argv[1]);
-    if (strcasecmp(arg->argv[2], "HISADDR") == 0)
-      gateway = IpcpInfo.his_ipaddr;
-    else
-      gateway = GetIpAddr(arg->argv[2]);
-    OsSetRoute(RTM_ADD, dest, gateway, netmask);
-    return 0;
+    gw = 2;
   }
-  return -1;
+  if (strcasecmp(arg->argv[gw], "HISADDR") == 0)
+    gateway = IpcpInfo.his_ipaddr;
+  else if (strcasecmp(arg->argv[gw], "INTERFACE") == 0)
+    gateway.s_addr = INADDR_ANY;
+  else
+    gateway = GetIpAddr(arg->argv[gw]);
+  OsSetRoute(RTM_ADD, dest, gateway, netmask);
+  return 0;
 }
 
 static int
 DeleteCommand(struct cmdargs const *arg)
 {
-  struct in_addr dest, gateway, netmask;
+  struct in_addr dest, none;
 
-  if (arg->argc == 1 && strcasecmp(arg->argv[0], "all") == 0)
-    DeleteIfRoutes(0);
-  else if (arg->argc > 0 && arg->argc < 4) {
-    if (strcasecmp(arg->argv[0], "MYADDR") == 0)
-      dest = IpcpInfo.want_ipaddr;
-    else
-      dest = GetIpAddr(arg->argv[0]);
-    netmask.s_addr = INADDR_ANY;
-    if (arg->argc > 1) {
-      if (strcasecmp(arg->argv[1], "HISADDR") == 0)
-	gateway = IpcpInfo.his_ipaddr;
+  if (arg->argc == 1)
+    if(strcasecmp(arg->argv[0], "all") == 0)
+      DeleteIfRoutes(0);
+    else {
+      if (strcasecmp(arg->argv[0], "MYADDR") == 0)
+        dest = IpcpInfo.want_ipaddr;
+      else if (strcasecmp(arg->argv[0], "default") == 0)
+        dest.s_addr = INADDR_ANY;
       else
-	gateway = GetIpAddr(arg->argv[1]);
-      if (arg->argc == 3) {
-	if (inet_aton(arg->argv[2], &netmask) == 0) {
-	  LogPrintf(LogWARN, "Bad netmask value.\n");
-	  return -1;
-	}
-      }
-    } else
-      gateway.s_addr = INADDR_ANY;
-    OsSetRoute(RTM_DELETE, dest, gateway, netmask);
-  } else
+        dest = GetIpAddr(arg->argv[0]);
+      none.s_addr = INADDR_ANY;
+      OsSetRoute(RTM_DELETE, dest, none, none);
+    }
+  else
     return -1;
 
   return 0;
diff --git a/usr.sbin/ppp/ppp.8 b/usr.sbin/ppp/ppp.8
index 3dffb081f20..a2e072bfb20 100644
--- a/usr.sbin/ppp/ppp.8
+++ b/usr.sbin/ppp/ppp.8
@@ -1,4 +1,4 @@
-.\" $Id: ppp.8,v 1.2 1997/12/06 12:09:02 brian Exp $
+.\" $Id: ppp.8,v 1.3 1997/12/07 04:09:08 brian Exp $
 .Dd 20 September 1995
 .Os OpenBSD
 .Dt PPP 8
@@ -353,12 +353,12 @@ PPP ON awfulhak> add 0 0 HISADDR
 
 The string
 .Sq HISADDR
-represents the IP address of the connected peer.  This variable is only
-available once a connection has been established.  A common error
-is to specify the above command in your
-.Pa /etc/ppp/ppp.conf
-file.  This won't work as the remote IP address hasn't been
-established when this file is read.
+represents the IP address of the connected peer.  It is possible to
+use the keyword
+.Sq INTERFACE
+in place of
+.Sq HISADDR .
+This will create a direct route on the tun interface.
 
 You can now use your network applications (ping, telnet, ftp etc.)
 in other windows on your machine.
@@ -1738,16 +1738,34 @@ you require the user to both login and authenticate themselves.
 .El
 
 .It add dest mask gateway
-.Dq Dest
+.Ar Dest
 is the destination IP address and
-.Dq mask
+.Ar mask
 is its mask.
-.Dq 0 0
-refers to the default route.
-.Dq Gateway
+.Ar 0 0
+refers to the default route, and it is possible to use the symbolic name
+.Sq default
+in place of both the
+.Ar dest
+and
+.Ar mask
+arguments.
+.Ar Gateway
 is the next hop gateway to get to the given
-.Dq dest
-machine/network.
+.Ar dest
+machine/network.  It is possible to use the symbolic names
+.Sq HISADDR
+or
+.Sq INTERFACE
+as the
+.Ar gateway .
+.Sq INTERFACE
+is replaced with the current interface name and
+.Sq HISADDR
+is replaced with the current interface address.  If the current interface
+address has not yet been assigned, the current
+.Sq INTERFACE
+is used instead.
 
 .It allow .....
 This command controls access to
@@ -1895,24 +1913,21 @@ command instead.
 .It close
 Close the current connection (but don't quit).
 
-.It delete ALL | dest [gateway [mask]]
-If
-.Dq ALL
-is specified, all non-direct entries in the routing for the interface
-that
+.It delete dest
+This command deletes the route with the given
+.Ar dest
+IP address.  If
+.Ar dest
+is specified as
+.Sq ALL ,
+all non-direct entries in the routing for the current interface that
 .Nm
 is using are deleted.  This means all entries for tunN, except the entry
-representing the actual link.  When
-.Dq ALL
-is not used, any existing route with the given
-.Dq dest ,
-destination network
-.Dq mask
-and
-.Dq gateway
-is deleted.  The default
-.Dq mask
-value is 0.0.0.0.
+representing the actual link.  If
+.Ar dest
+is specified as
+.Sq default ,
+the default route is deleted.
 
 .It dial|call [remote]
 If
diff --git a/usr.sbin/ppp/route.c b/usr.sbin/ppp/route.c
index 4cae9029691..f3b761c08ba 100644
--- a/usr.sbin/ppp/route.c
+++ b/usr.sbin/ppp/route.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: route.c,v 1.2 1997/12/06 12:09:16 brian Exp $
+ * $Id: route.c,v 1.3 1997/12/07 04:09:09 brian Exp $
  *
  */
 
@@ -51,6 +51,7 @@
 #include "route.h"
 
 static int IfIndex;
+static const char *Index2Nam(int);
 
 struct rtmsg {
   struct rt_msghdr m_rtm;
@@ -69,7 +70,6 @@ OsSetRoute(int cmd,
   int s, nb, wb;
   char *cp;
   const char *cmdstr;
-  u_long *lp;
   struct sockaddr_in rtdata;
 
   cmdstr = (cmd == RTM_ADD ? "Add" : "Delete");
@@ -81,7 +81,7 @@ OsSetRoute(int cmd,
   memset(&rtmes, '\0', sizeof(rtmes));
   rtmes.m_rtm.rtm_version = RTM_VERSION;
   rtmes.m_rtm.rtm_type = cmd;
-  rtmes.m_rtm.rtm_addrs = RTA_DST | RTA_NETMASK;
+  rtmes.m_rtm.rtm_addrs = RTA_DST;
   rtmes.m_rtm.rtm_seq = ++seqno;
   rtmes.m_rtm.rtm_pid = getpid();
   rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
@@ -95,24 +95,43 @@ OsSetRoute(int cmd,
   cp = rtmes.m_space;
   memcpy(cp, &rtdata, 16);
   cp += 16;
-  if (gateway.s_addr) {
-    rtdata.sin_addr = gateway;
-    memcpy(cp, &rtdata, 16);
-    cp += 16;
-    rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
-  }
+  if (cmd == RTM_ADD)
+    if (gateway.s_addr == INADDR_ANY) {
+      /* Add a route through the interface */
+      struct sockaddr_dl dl;
+      const char *iname;
+      int ilen;
+
+      iname = Index2Nam(IfIndex);
+      ilen = strlen(iname);
+      dl.sdl_len = sizeof(dl)-sizeof(dl.sdl_data)+ilen;
+      dl.sdl_family = AF_LINK;
+      dl.sdl_index = IfIndex;
+      dl.sdl_type = 0;
+      dl.sdl_nlen = ilen;
+      dl.sdl_alen = 0;
+      dl.sdl_slen = 0;
+      strcpy(dl.sdl_data, iname);
+
+      memcpy(cp, &dl, dl.sdl_len);
+      cp += dl.sdl_len;
+      rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
+    } else {
+      rtdata.sin_addr = gateway;
+      memcpy(cp, &rtdata, 16);
+      cp += 16;
+      rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
+    }
+
   if (dst.s_addr == INADDR_ANY)
     mask.s_addr = INADDR_ANY;
 
-  lp = (u_long *) cp;
-
-  if (mask.s_addr) {
-    *lp++ = 8;
-    cp += sizeof(int);
-    *lp = mask.s_addr;
-  } else
-    *lp = 0;
-  cp += sizeof(u_long);
+  if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) {
+    rtdata.sin_addr = mask;
+    memcpy(cp, &rtdata, 16);
+    cp += 16;
+    rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
+  }
 
   nb = cp - (char *) &rtmes;
   rtmes.m_rtm.rtm_msglen = nb;
@@ -401,13 +420,13 @@ DeleteIfRoutes(int all)
 {
   struct rt_msghdr *rtm;
   struct sockaddr *sa;
-  struct in_addr sa_dst, sa_gw, sa_mask;
+  struct in_addr sa_dst, sa_none;
   int needed;
   char *sp, *cp, *ep;
-  u_char *wp;
   int mib[6];
 
   LogPrintf(LogDEBUG, "DeleteIfRoutes (%d)\n", IfIndex);
+  sa_none.s_addr = INADDR_ANY;
 
   mib[0] = CTL_NET;
   mib[1] = PF_ROUTE;
@@ -446,24 +465,15 @@ DeleteIfRoutes(int all)
 	rtm->rtm_index == IfIndex &&
 	(all || (rtm->rtm_flags & RTF_GATEWAY))) {
       sa_dst.s_addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
-      wp = (u_char *) cp + rtm->rtm_msglen;
       sa = (struct sockaddr *)((char *)sa + sa->sa_len);
-      if (sa->sa_family == AF_INET) {
+      if (sa->sa_family == AF_INET || sa->sa_family == AF_LINK) {
         LogPrintf(LogDEBUG, "DeleteIfRoutes: Remove it\n");
-        sa_gw.s_addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
-        sa = (struct sockaddr *)((char *)sa + sa->sa_len);
-        if (rtm->rtm_addrs & RTA_NETMASK)
-          sa_mask.s_addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
-        else
-          sa_mask.s_addr = 0xffffffff;
-        if (sa_dst.s_addr == INADDR_ANY)
-	  sa_mask.s_addr = INADDR_ANY;
         LogPrintf(LogDEBUG, "DeleteIfRoutes: Dst: %s\n", inet_ntoa(sa_dst));
-        LogPrintf(LogDEBUG, "DeleteIfRoutes: Gw: %s\n", inet_ntoa(sa_gw));
-        LogPrintf(LogDEBUG, "DeleteIfRoutes: Index: %d\n", rtm->rtm_index);
-        OsSetRoute(RTM_DELETE, sa_dst, sa_gw, sa_mask);
+        OsSetRoute(RTM_DELETE, sa_dst, sa_none, sa_none);
       } else
-        LogPrintf(LogDEBUG, "DeleteIfRoutes: Can't remove an AF_LINK !\n");
+        LogPrintf(LogDEBUG,
+                  "DeleteIfRoutes: Can't remove routes of %d family !\n",
+                  sa->sa_family);
     }
   }
   free(sp);