X-Git-Url: https://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fipcp.c;h=b3096c6501e27404cf4742c87c29adbcb8143102;hp=310f869067ef2b3484e4106d52ff1e1a63d7dbee;hb=f7f6e00dd75ae5f73808e000387a1f09c2f1a1ac;hpb=08b5e975f6d15eae1998b76d2aea04186e039cc9

diff --git a/pppd/ipcp.c b/pppd/ipcp.c
index 310f869..b3096c6 100644
--- a/pppd/ipcp.c
+++ b/pppd/ipcp.c
@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: ipcp.c,v 1.15 1995/04/24 05:58:38 paulus Exp $";
+static char rcsid[] = "$Id: ipcp.c,v 1.17 1995/04/28 06:24:53 paulus Exp $";
 #endif
 
 /*
@@ -575,13 +575,13 @@ ipcp_nakci(f, p, len)
 	case CI_ADDR:
 	    if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR)
 		goto bad;
-	    try.neg_addr = 1;
 	    try.old_addrs = 0;
 	    GETLONG(l, p);
 	    ciaddr1 = htonl(l);
 	    if (ciaddr1 && go->accept_local)
 		try.ouraddr = ciaddr1;
-	    no.neg_addr = 1;
+	    if (try.ouraddr != 0)
+		no.neg_addr = 1;
 	    break;
 	default:
 	    goto bad;
@@ -778,6 +778,13 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
 		    tl = ntohl(wo->hisaddr);
 		    PUTLONG(tl, p);
 		}
+	    } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
+		/*
+		 * If neither we nor he knows his address, reject the option.
+		 */
+		orc = CONFREJ;
+		wo->req_addr = 0;	/* don't NAK with 0.0.0.0 later */
+		break;
 	    }
 
 	    /*
@@ -832,6 +839,13 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
 		    tl = ntohl(wo->hisaddr);
 		    PUTLONG(tl, p);
 		}
+	    } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
+		/*
+		 * Don't ACK an address of 0.0.0.0 - reject it instead.
+		 */
+		orc = CONFREJ;
+		wo->req_addr = 0;	/* don't NAK with 0.0.0.0 later */
+		break;
 	    }
 	
 	    ho->neg_addr = 1;