support micro$oft DNS options;

[ppp.git] / pppd / ipcp.c

diff --git a/pppd/ipcp.c b/pppd/ipcp.c
index abeae25b4d1cc5fde77b30228669406980ce8ada..734f7413e013024ff464894b383f72d0ac028253 100644 (file)
--- a/pppd/ipcp.c
+++ b/pppd/ipcp.c
@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: ipcp.c,v 1.16 1995/04/26 06:46:50 paulus Exp $";
+static char rcsid[] = "$Id: ipcp.c,v 1.22 1995/12/18 03:45:56 paulus Exp $";
 #endif
 
 /*
@@ -80,6 +80,12 @@ static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
     "IPCP"                     /* String name of protocol */
 };
 
+struct protent ipcp_protent = {
+    PPP_IPCP, ipcp_init, ipcp_input, ipcp_protrej,
+    ipcp_lowerup, ipcp_lowerdown, ipcp_open, ipcp_close,
+    ipcp_printpkt, NULL, 1, "IPCP"
+};
+
 /*
  * Lengths of configuration options.
  */
@@ -130,13 +136,11 @@ ipcp_init(unit)
     f->callbacks = &ipcp_callbacks;
     fsm_init(&ipcp_fsm[unit]);
 
-    wo->neg_addr = 1;
-    wo->old_addrs = 0;
-    wo->ouraddr = 0;
-    wo->hisaddr = 0;
+    memset(wo, 0, sizeof(*wo));
+    memset(ao, 0, sizeof(*ao));
 
+    wo->neg_addr = 1;
     wo->neg_vj = 1;
-    wo->old_vj = 0;
     wo->vj_protocol = IPCP_VJ_COMP;
     wo->maxslotindex = MAX_STATES - 1; /* really max index */
     wo->cflag = 1;
@@ -149,6 +153,13 @@ ipcp_init(unit)
     ao->neg_vj = 1;
     ao->maxslotindex = MAX_STATES - 1;
     ao->cflag = 1;
+
+    /*
+     * XXX These control whether the user may use the proxyarp
+     * and defaultroute options.
+     */
+    ao->proxy_arp = 1;
+    ao->default_route = 1;
 }
 
 
@@ -167,10 +178,11 @@ ipcp_open(unit)
  * ipcp_close - Take IPCP down.
  */
 void
-ipcp_close(unit)
+ipcp_close(unit, reason)
     int unit;
+    char *reason;
 {
-    fsm_close(&ipcp_fsm[unit]);
+    fsm_close(&ipcp_fsm[unit], reason);
 }
 
 
@@ -575,16 +587,15 @@ 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;
+           if (try.ouraddr != 0)
+               try.neg_addr = 1;
            no.neg_addr = 1;
            break;
-       default:
-           goto bad;
        }
        p = next;
     }
@@ -783,6 +794,7 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
                 * 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;
            }
 
@@ -843,12 +855,53 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
                 * 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;
            ho->hisaddr = ciaddr1;
            break;
+
+#ifdef USE_MS_DNS
+       case CI_MS_DNS1:
+           /* Microsoft primary DNS request */
+           IPCPDEBUG((LOG_INFO, "ipcp: received DNS1 Request "));
+
+           /* If we do not have a DNS address then we cannot send it */
+           if (ao->dnsaddr[0] == 0 ||
+               cilen != CILEN_ADDR) {  /* Check CI length */
+               orc = CONFREJ;          /* Reject CI */
+               break;
+           }
+           GETLONG(tl, p);
+           if (htonl(tl) != ao->dnsaddr[0]) {
+                DECPTR(sizeof(u_int32_t), p);
+               tl = ntohl(ao->dnsaddr[0]);
+               PUTLONG(tl, p);
+               orc = CONFNAK;
+            }
+            break;
+
+       case CI_MS_DNS2:
+           /* Microsoft secondary DNS request */
+           IPCPDEBUG((LOG_INFO, "ipcp: received DNS2 Request "));
+
+           /* If we do not have a DNS address then we cannot send it */
+           if (ao->dnsaddr[1] == 0 ||  /* Yes, this is the first one! */
+               cilen != CILEN_ADDR) {  /* Check CI length */
+               orc = CONFREJ;          /* Reject CI */
+               break;
+           }
+           GETLONG(tl, p);
+           if (htonl(tl) != ao->dnsaddr[1]) { /* and this is the 2nd one */
+                DECPTR(sizeof(u_int32_t), p);
+               tl = ntohl(ao->dnsaddr[1]);
+               PUTLONG(tl, p);
+               orc = CONFNAK;
+            }
+            break;
+#endif
        
        case CI_COMPRESSTYPE:
            IPCPDEBUG((LOG_INFO, "ipcp: received COMPRESSTYPE "));
@@ -886,7 +939,7 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
                    }
                }
                ho->maxslotindex = maxslotindex;
-               ho->cflag = wo->cflag;
+               ho->cflag = cflag;
            } else {
                ho->old_vj = 1;
                ho->maxslotindex = MAX_STATES - 1;
@@ -984,12 +1037,12 @@ ipcp_up(f)
 
     if (ho->hisaddr == 0) {
        syslog(LOG_ERR, "Could not determine remote IP address");
-       ipcp_close(f->unit);
+       ipcp_close(f->unit, "Could not determine remote IP address");
        return;
     }
     if (go->ouraddr == 0) {
        syslog(LOG_ERR, "Could not determine local IP address");
-       ipcp_close(f->unit);
+       ipcp_close(f->unit, "Could not determine local IP address");
        return;
     }
 
@@ -999,7 +1052,7 @@ ipcp_up(f)
     if (!auth_ip_addr(f->unit, ho->hisaddr)) {
        syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
               ip_ntoa(ho->hisaddr));
-       ipcp_close(f->unit);
+       ipcp_close(f->unit, "Unauthorized remote IP address");
        return;
     }
 
@@ -1012,7 +1065,7 @@ ipcp_up(f)
     mask = GetMask(go->ouraddr);
     if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
        IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
-       ipcp_close(f->unit);
+       ipcp_close(f->unit, "Interface configuration failed");
        return;
     }
 
@@ -1022,7 +1075,7 @@ ipcp_up(f)
     /* bring the interface up for IP */
     if (!sifup(f->unit)) {
        IPCPDEBUG((LOG_WARNING, "sifup failed"));
-       ipcp_close(f->unit);
+       ipcp_close(f->unit, "Interface configuration failed");
        return;
     }