Ignore routes through our own interface in have_route_to

[ppp.git] / pppd / sys-svr4.c

diff --git a/pppd/sys-svr4.c b/pppd/sys-svr4.c
index fcdc6ba22564384a0901871f3d84c5edaf720018..17b208c87d17ffb688fd0b4e1cde447817a0e12c 100644 (file)
--- a/pppd/sys-svr4.c
+++ b/pppd/sys-svr4.c
@@ -26,7 +26,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: sys-svr4.c,v 1.20 1999/02/26 10:35:34 paulus Exp $";
+static char rcsid[] = "$Id: sys-svr4.c,v 1.21 1999/03/08 01:46:49 paulus Exp $";
 #endif
 
 #include <limits.h>
@@ -91,6 +91,7 @@ static int    tty_nmodules;
 static char    tty_modules[NMODULES][FMNAMESZ+1];
 
 static int     if_is_up;       /* Interface has been marked up */
+static u_int32_t remote_addr;          /* IP address of peer */
 static u_int32_t default_route_gateway;        /* Gateway for default route added */
 static u_int32_t proxy_arp_addr;       /* Addr for proxy arp entry added */
 
@@ -1125,6 +1126,7 @@ sifaddr(u, o, h, m)
     }
 #endif
 
+    remote_addr = h;
     return ret;
 }
 
@@ -1148,6 +1150,7 @@ cifaddr(u, o, h)
        ipmuxid = -1;
     }
 #endif
+    remote_addr = 0;
     return 1;
 }
 
@@ -1726,6 +1729,8 @@ cifroute(u, our, his)
 /*
  * have_route_to - determine if the system has a route to the specified
  * IP address.  Returns 0 if not, 1 if so, -1 if we can't tell.
+ * For demand mode to work properly, we have to ignore routes
+ * through our own interface.
  */
 #ifndef T_CURRENT              /* needed for Solaris 2.5 */
 #define T_CURRENT      MI_T_CURRENT
@@ -1813,7 +1818,8 @@ have_route_to(addr)
                    syslog(LOG_DEBUG, "have_route_to: dest=%x gw=%x mask=%x\n",
                           rp->ipRouteDest, rp->ipRouteNextHop,
                           rp->ipRouteMask);
-                   if (((addr ^ rp->ipRouteDest) && rp->ipRouteMask) == 0)
+                   if (((addr ^ rp->ipRouteDest) && rp->ipRouteMask) == 0
+                       && rp->ipRouteNextHop != remote_addr)
                        return 1;
                }
            }