Work around a bug in the Sun rpc code. This fixes a problem where

a machine with aliase ip addresses on the same subnet of an
interfaces' `real' ip addresses would generate <n> duplicate
broadcasts in clnt_broadcast().
Basically, this fix does a purge on the list of bradcast addresses.

1 files changed, 12 insertions, 4 deletions

diff --git a/lib/libc/rpc/pmap_rmt.c b/lib/libc/rpc/pmap_rmt.c
index 8511206..4b907ab 100644
--- a/lib/libc/rpc/pmap_rmt.c
+++ b/lib/libc/rpc/pmap_rmt.c
@@ -30,7 +30,7 @@
 #if defined(LIBC_SCCS) && !defined(lint)
 /*static char *sccsid = "from: @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";*/
 /*static char *sccsid = "from: @(#)pmap_rmt.c	2.2 88/08/01 4.0 RPCSRC";*/
-static char *rcsid = "$Id: pmap_rmt.c,v 1.3 1995/10/22 14:51:32 phk Exp $";
+static char *rcsid = "$Id: pmap_rmt.c,v 1.4 1995/12/07 12:50:55 bde Exp $";
 #endif
 
 /*
@@ -171,6 +171,7 @@ getbroadcastnets(addrs, sock, buf)
 	struct ifconf ifc;
         struct ifreq ifreq, *ifr;
 	struct sockaddr_in *sin;
+	struct	in_addr addr;
         char *cp, *cplim;
         int n, i = 0;
 
@@ -198,17 +199,24 @@ getbroadcastnets(addrs, sock, buf)
 			sin = (struct sockaddr_in *)&ifr->ifr_addr;
 #ifdef SIOCGIFBRDADDR   /* 4.3BSD */
 			if (ioctl(sock, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
-				addrs[i++] =
+				addr =
 				    inet_makeaddr(inet_netof(sin->sin_addr),
 				    INADDR_ANY);
 			} else {
-				addrs[i++] = ((struct sockaddr_in*)
+				addr = ((struct sockaddr_in*)
 				  &ifreq.ifr_addr)->sin_addr;
 			}
 #else /* 4.2 BSD */
-			addrs[i++] = inet_makeaddr(inet_netof(sin->sin_addr),
+			addr = inet_makeaddr(inet_netof(sin->sin_addr),
 			    INADDR_ANY);
 #endif
+			for (n=i-1; n>=0; n--) {
+				if (addr.s_addr == addrs[n].s_addr)
+					break;
+			}
+			if (n<0) {
+				addrs[i++] = addr;
+			}
 		}
 	}
 	return (i);