Latest version of pppd from ppp-2.1 release

usr.sbin/pppd/Makefile

@@ -1,8 +1,8 @@
-#	$Id: Makefile,v 1.5 1993/11/10 01:33:51 paulus Exp $
+#	$Id: Makefile,v 1.6 1994/05/08 12:16:10 paulus Exp $
 
 PROG=	pppd
 SRCS=	main.c magic.c fsm.c lcp.c ipcp.c upap.c chap.c md5.c \
-	auth.c options.c sys-bsd.c
+	auth.c options.c lock.c sys-bsd.c
 MAN8=	pppd.0
 SUBDIR=	pppstats chat
 BINMODE=4555

usr.sbin/pppd/auth.c

@@ -33,7 +33,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: auth.c,v 1.4 1994/01/25 05:58:02 paulus Exp $";
+static char rcsid[] = "$Id: auth.c,v 1.5 1994/05/08 12:16:13 paulus Exp $";
 #endif
 
 #include <stdio.h>
@@ -106,6 +106,7 @@ void check_access __ARGS((FILE *, char *));
 
 static int  login __ARGS((char *, char *, char **, int *));
 static void logout __ARGS((void));
+static int  null_login __ARGS((int));
 static int  get_upap_passwd __ARGS((void));
 static int  have_upap_secret __ARGS((void));
 static int  have_chap_secret __ARGS((char *, char *));
@@ -135,11 +136,18 @@ link_terminated(unit)
 {
     if (logged_in)
 	logout();
-    if (lcp_wantoptions[unit].restart) {
+    phase = PHASE_DEAD;
-	lcp_lowerdown(unit);
+    syslog(LOG_NOTICE, "Connection terminated.");
-	lcp_lowerup(unit);
+}
-    } else
+
-	EXIT(unit);
+/*
+ * LCP has gone down; it will either die or try to re-establish.
+ */
+void
+link_down(unit)
+    int unit;
+{
+    phase = PHASE_TERMINATE;
 }
 
 /*
@@ -157,14 +165,19 @@ link_established(unit)
 
     if (auth_required && !(go->neg_chap || go->neg_upap)) {
 	/*
-	 * We wanted the peer to authenticate himself, and he refused:
+	 * We wanted the peer to authenticate itself, and it refused:
-	 * tell him to go away.
+	 * treat it as though it authenticated with PAP using a username
+	 * of "" and a password of "".  If that's not OK, boot it out.
 	 */
+	if (wo->neg_upap && !null_login(unit)) {
 	    syslog(LOG_WARNING, "peer refused to authenticate");
 	    lcp_close(unit);
+	    phase = PHASE_TERMINATE;
 	    return;
 	}
+    }
 
+    phase = PHASE_AUTHENTICATE;
     auth = 0;
     if (go->neg_chap) {
 	ChapAuthPeer(unit, our_name, go->chap_mdtype);
@@ -182,8 +195,10 @@ link_established(unit)
     }
     auth_pending[unit] = auth;
 
-    if (!auth)
+    if (!auth) {
+	phase = PHASE_NETWORK;
 	ipcp_open(unit);
+    }
 }
 
 /*
@@ -197,6 +212,7 @@ auth_peer_fail(unit, protocol)
      * Authentication failure: take the link down
      */
     lcp_close(unit);
+    phase = PHASE_TERMINATE;
 }
 
 /*
@@ -225,8 +241,10 @@ auth_peer_success(unit, protocol)
      * If there is no more authentication still to be done,
      * proceed to the network phase.
      */
-    if ((auth_pending[unit] &= ~bit) == 0)
+    if ((auth_pending[unit] &= ~bit) == 0) {
+	phase = PHASE_NETWORK;
 	ipcp_open(unit);
+    }
 }
 
 /*
@@ -268,8 +286,10 @@ auth_withpeer_success(unit, protocol)
      * If there is no more authentication still being done,
      * proceed to the network phase.
      */
-    if ((auth_pending[unit] &= ~bit) == 0)
+    if ((auth_pending[unit] &= ~bit) == 0) {
+	phase = PHASE_NETWORK;
 	ipcp_open(unit);
+    }
 }
 
 
@@ -485,6 +505,46 @@ logout()
 }
 
 
+/*
+ * null_login - Check if a username of "" and a password of "" are
+ * acceptable, and iff so, set the list of acceptable IP addresses
+ * and return 1.
+ */
+static int
+null_login(unit)
+    int unit;
+{
+    char *filename;
+    FILE *f;
+    int i, ret;
+    struct wordlist *addrs;
+    char secret[MAXWORDLEN];
+
+    /*
+     * Open the file of upap secrets and scan for a suitable secret.
+     * We don't accept a wildcard client.
+     */
+    filename = _PATH_UPAPFILE;
+    addrs = NULL;
+    f = fopen(filename, "r");
+    if (f == NULL)
+	return 0;
+    check_access(f, filename);
+
+    i = scan_authfile(f, "", our_name, secret, &addrs, filename);
+    ret = i >= 0 && (i & NONWILD_CLIENT) != 0 && secret[0] == 0;
+
+    if (ret) {
+	if (addresses[unit] != NULL)
+	    free_wordlist(addresses[unit]);
+	addresses[unit] = addrs;
+    }
+
+    fclose(f);
+    return ret;
+}
+
+
 /*
  * get_upap_passwd - get a password for authenticating ourselves with
  * our peer using PAP.  Returns 1 on success, 0 if no suitable password

usr.sbin/pppd/chap.c

@@ -19,7 +19,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: chap.c,v 1.3 1993/11/10 01:33:59 paulus Exp $";
+static char rcsid[] = "$Id: chap.c,v 1.4 1994/05/08 12:16:15 paulus Exp $";
 #endif
 
 /*
@@ -557,6 +557,8 @@ ChapReceiveSuccess(cstate, inp, id, len)
 	return;
     }
 
+    UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+
     /*
      * Print message.
      */
@@ -591,6 +593,8 @@ ChapReceiveFailure(cstate, inp, id, len)
 	return;
     }
 
+    UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+
     /*
      * Print message.
      */
@@ -738,6 +742,71 @@ ChapSendResponse(cstate)
     ++cstate->resp_transmits;
 }
 
+/*
+ * ChapPrintPkt - print the contents of a CHAP packet.
+ */
+char *ChapCodenames[] = {
+    "Challenge", "Response", "Success", "Failure"
+};
+
+int
+ChapPrintPkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int code, id, len;
+    int clen, nlen;
+    u_char x;
+
+    if (plen < CHAP_HEADERLEN)
+	return 0;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < CHAP_HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *))
+	printer(arg, " %s", ChapCodenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= CHAP_HEADERLEN;
+    switch (code) {
+    case CHAP_CHALLENGE:
+    case CHAP_RESPONSE:
+	if (len < 1)
+	    break;
+	clen = p[0];
+	if (len < clen + 1)
+	    break;
+	++p;
+	nlen = len - clen - 1;
+	printer(arg, " <");
+	for (; clen > 0; --clen) {
+	    GETCHAR(x, p);
+	    printer(arg, "%.2x", x);
+	}
+	printer(arg, ">, name = ");
+	print_string((char *)p, nlen, printer, arg);
+	break;
+    case CHAP_FAILURE:
+    case CHAP_SUCCESS:
+	printer(arg, " ");
+	print_string((char *)p, len, printer, arg);
+	break;
+    default:
+	for (clen = len; clen > 0; --clen) {
+	    GETCHAR(x, p);
+	    printer(arg, " %.2x", x);
+	}
+    }
+
+    return len + CHAP_HEADERLEN;
+}
+
 #ifdef NO_DRAND48
 
 double drand48()

usr.sbin/pppd/chap.h

@@ -1,6 +1,5 @@
 /*
  * chap.h - Cryptographic Handshake Authentication Protocol definitions.
- *          based on November 1991 draft of PPP Authentication RFC
  *
  * Copyright (c) 1991 Gregory M. Christy
  * All rights reserved.
@@ -16,13 +15,13 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: chap.h,v 1.3 1993/11/10 01:34:02 paulus Exp $
+ * $Id: chap.h,v 1.4 1994/05/08 12:16:16 paulus Exp $
  */
 
 #ifndef __CHAP_INCLUDE__
 
 /* Code + ID + length */
-#define CHAP_HEADERLEN	(sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
+#define CHAP_HEADERLEN		4
 
 /*
  * CHAP codes.
@@ -106,6 +105,8 @@ void ChapLowerUp __ARGS((int));
 void ChapLowerDown __ARGS((int));
 void ChapInput __ARGS((int, u_char *, int));
 void ChapProtocolReject __ARGS((int));
+int  ChapPrintPkt __ARGS((u_char *, int,
+			  void (*) __ARGS((void *, char *, ...)), void *));
 
 #define __CHAP_INCLUDE__
 #endif /* __CHAP_INCLUDE__ */

usr.sbin/pppd/fsm.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: fsm.c,v 1.3 1993/11/10 01:34:04 paulus Exp $";
+static char rcsid[] = "$Id: fsm.c,v 1.4 1994/05/08 12:16:17 paulus Exp $";
 #endif
 
 /*
@@ -29,7 +29,6 @@ static char rcsid[] = "$Id: fsm.c,v 1.3 1993/11/10 01:34:04 paulus Exp $";
 
 #include <stdio.h>
 #include <sys/types.h>
-/*#include <malloc.h>*/
 #include <syslog.h>
 
 #include "ppp.h"
@@ -453,6 +452,7 @@ fsm_rconfack(f, id, inp, len)
 		  PROTO_NAME(f), len));
 	return;
     }
+    f->reqid = -1;
 
     switch (f->state) {
     case CLOSED:
@@ -514,6 +514,7 @@ fsm_rconfnakrej(f, code, id, inp, len)
 		  PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
 	return;
     }
+    f->reqid = -1;
 
     switch (f->state) {
     case CLOSED:
@@ -556,7 +557,6 @@ fsm_rtermreq(f, id)
     FSMDEBUG((LOG_INFO, "fsm_rtermreq(%s): Rcvd id %d.",
 	      PROTO_NAME(f), id));
 
-    fsm_sdata(f, TERMACK, id, NULL, 0);
     switch (f->state) {
     case ACKRCVD:
     case ACKSENT:
@@ -572,6 +572,8 @@ fsm_rtermreq(f, id)
 	TIMEOUT(fsm_timeout, (caddr_t) f, f->timeouttime);
 	break;
     }
+
+    fsm_sdata(f, TERMACK, id, NULL, 0);
 }
 
 

usr.sbin/pppd/fsm.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: fsm.h,v 1.3 1993/11/10 01:34:07 paulus Exp $
+ * $Id: fsm.h,v 1.4 1994/05/08 12:16:18 paulus Exp $
  */
 
 /*
@@ -35,11 +35,6 @@
 #define TERMREQ		5	/* Termination Request */
 #define TERMACK		6	/* Termination Ack */
 #define CODEREJ		7	/* Code Reject */
-#define PROTREJ		8	/* Protocol Reject */
-#define ECHOREQ		9	/* Echo Request */
-#define ECHOREP		10	/* Echo Reply */
-#define DISCREQ		11	/* Discard Request */
-#define KEEPALIVE	12	/* Keepalive */
 
 
 /*

usr.sbin/pppd/ipcp.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: ipcp.c,v 1.4 1994/02/22 00:11:57 paulus Exp $";
+static char rcsid[] = "$Id: ipcp.c,v 1.5 1994/05/08 12:16:19 paulus Exp $";
 #endif
 
 /*
@@ -43,7 +43,7 @@ static char rcsid[] = "$Id: ipcp.c,v 1.4 1994/02/22 00:11:57 paulus Exp $";
 #include "ppp.h"
 #include "fsm.h"
 #include "ipcp.h"
-
+#include "pathnames.h"
 
 /* global vars */
 ipcp_options ipcp_wantoptions[NPPP];	/* Options that we want to request */
@@ -51,6 +51,10 @@ ipcp_options ipcp_gotoptions[NPPP];	/* Options that peer ack'd */
 ipcp_options ipcp_allowoptions[NPPP];	/* Options we allow peer to request */
 ipcp_options ipcp_hisoptions[NPPP];	/* Options that we ack'd */
 
+extern char ifname[];
+extern char devname[];
+extern int baud_rate;
+
 /* local vars */
 static int cis_received[NPPP];		/* # Conf-Reqs received */
 
@@ -66,7 +70,7 @@ static int  ipcp_rejci __ARGS((fsm *, u_char *, int));	/* Peer rej'd our CI */
 static int  ipcp_reqci __ARGS((fsm *, u_char *, int *, int)); /* Rcv CI */
 static void ipcp_up __ARGS((fsm *));		/* We're UP */
 static void ipcp_down __ARGS((fsm *));		/* We're DOWN */
-
+static void ipcp_script __ARGS((fsm *, char *)); /* Run an up/down script */
 
 fsm ipcp_fsm[NPPP];		/* IPCP fsm structure */
 
@@ -885,6 +889,10 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
 		}
 		ho->maxslotindex = maxslotindex;
 		ho->cflag = wo->cflag;
+	    } else {
+		ho->old_vj = 1;
+		ho->maxslotindex = MAX_STATES - 1;
+		ho->cflag = 1;
 	    }
 	    break;
 
@@ -988,7 +996,7 @@ ipcp_up(f)
     }
 
     /*
-     * Check that the peer is allowed to use the IP address he wants.
+     * Check that the peer is allowed to use the IP address it wants.
      */
     if (!auth_ip_addr(f->unit, ho->hisaddr)) {
 	syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
@@ -1011,7 +1019,7 @@ ipcp_up(f)
     }
 
     /* set tcp compression */
-    sifvjcomp(f->unit, ho->neg_vj, ho->cflag);
+    sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
 
     /* bring the interface up for IP */
     if (!sifup(f->unit)) {
@@ -1029,6 +1037,13 @@ ipcp_up(f)
     if (ipcp_wantoptions[f->unit].proxy_arp)
 	if (sifproxyarp(f->unit, ho->hisaddr))
 	    go->proxy_arp = 1;
+
+    /*
+     * Execute the ip-up script, like this:
+     *	/etc/ppp/ip-up interface tty speed local-IP remote-IP
+     */
+    ipcp_script(f, _PATH_IPUP);
+
 }
 
 
@@ -1054,4 +1069,138 @@ ipcp_down(f)
 	cifdefaultroute(f->unit, hisaddr);
     sifdown(f->unit);
     cifaddr(f->unit, ouraddr, hisaddr);
+
+    /* Execute the ip-down script */
+    ipcp_script(f, _PATH_IPDOWN);
+}
+
+
+/*
+ * ipcp_script - Execute a script with arguments
+ * interface-name tty-name speed local-IP remote-IP.
+ */
+static void
+ipcp_script(f, script)
+    fsm *f;
+    char *script;
+{
+    char strspeed[32], strlocal[32], strremote[32];
+    char *argv[8];
+
+    sprintf(strspeed, "%d", baud_rate);
+    strcpy(strlocal, ip_ntoa(ipcp_gotoptions[f->unit].ouraddr));
+    strcpy(strremote, ip_ntoa(ipcp_hisoptions[f->unit].hisaddr));
+
+    argv[0] = script;
+    argv[1] = ifname;
+    argv[2] = devname;
+    argv[3] = strspeed;
+    argv[4] = strlocal;
+    argv[5] = strremote;
+    argv[6] = NULL;
+    run_program(script, argv, 0);
+}
+
+/*
+ * ipcp_printpkt - print the contents of an IPCP packet.
+ */
+char *ipcp_codenames[] = {
+    "ConfReq", "ConfAck", "ConfNak", "ConfRej",
+    "TermReq", "TermAck", "CodeRej"
+};
+
+int
+ipcp_printpkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer)();
+    void *arg;
+{
+    int code, id, len, olen;
+    u_char *pstart, *optend;
+    u_short cishort;
+    u_long cilong;
+
+    if (plen < HEADERLEN)
+	return 0;
+    pstart = p;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(ipcp_codenames) / sizeof(char *))
+	printer(arg, " %s", ipcp_codenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= HEADERLEN;
+    switch (code) {
+    case CONFREQ:
+    case CONFACK:
+    case CONFNAK:
+    case CONFREJ:
+	/* print option list */
+	while (len >= 2) {
+	    GETCHAR(code, p);
+	    GETCHAR(olen, p);
+	    p -= 2;
+	    if (olen < 2 || olen > len) {
+		break;
+	    }
+	    printer(arg, " <");
+	    len -= olen;
+	    optend = p + olen;
+	    switch (code) {
+	    case CI_ADDRS:
+		if (olen == CILEN_ADDRS) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "addrs %s", ip_ntoa(htonl(cilong)));
+		    GETLONG(cilong, p);
+		    printer(arg, " %s", ip_ntoa(htonl(cilong)));
+		}
+		break;
+	    case CI_COMPRESSTYPE:
+		if (olen >= CILEN_COMPRESS) {
+		    p += 2;
+		    GETSHORT(cishort, p);
+		    printer(arg, "compress ");
+		    switch (cishort) {
+		    case IPCP_VJ_COMP:
+			printer(arg, "VJ");
+			break;
+		    case IPCP_VJ_COMP_OLD:
+			printer(arg, "old-VJ");
+			break;
+		    default:
+			printer(arg, "0x%x", cishort);
+		    }
+		}
+		break;
+	    case CI_ADDR:
+		if (olen == CILEN_ADDR) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "addr %s", ip_ntoa(htonl(cilong)));
+		}
+		break;
+	    }
+	    while (p < optend) {
+		GETCHAR(code, p);
+		printer(arg, " %.2x", code);
+	    }
+	    printer(arg, ">");
+	}
+	break;
+    }
+
+    /* print the rest of the bytes in the packet */
+    for (; len > 0; --len) {
+	GETCHAR(code, p);
+	printer(arg, " %.2x", code);
+    }
+
+    return p - pstart;
 }

usr.sbin/pppd/ipcp.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: ipcp.h,v 1.4 1994/02/22 00:11:59 paulus Exp $
+ * $Id: ipcp.h,v 1.5 1994/05/08 12:16:20 paulus Exp $
  */
 
 /*
@@ -65,3 +65,4 @@ void ipcp_lowerup __ARGS((int));
 void ipcp_lowerdown __ARGS((int));
 void ipcp_input __ARGS((int, u_char *, int));
 void ipcp_protrej __ARGS((int));
+int  ipcp_printpkt __ARGS((u_char *, int, void (*)(), void *));

usr.sbin/pppd/lcp.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: lcp.c,v 1.3 1993/11/10 01:34:15 paulus Exp $";
+static char rcsid[] = "$Id: lcp.c,v 1.4 1994/05/08 12:16:22 paulus Exp $";
 #endif
 
 /*
@@ -55,6 +55,7 @@ lcp_options lcp_wantoptions[NPPP];	/* Options that we want to request */
 lcp_options lcp_gotoptions[NPPP];	/* Options that peer ack'd */
 lcp_options lcp_allowoptions[NPPP];	/* Options we allow peer to request */
 lcp_options lcp_hisoptions[NPPP];	/* Options that we ack'd */
+u_long xmit_accm[NPPP][8];		/* extended transmit ACCM */
 
 /*
  * Callbacks for fsm code.  (CI = Configuration Information)
@@ -129,7 +130,7 @@ lcp_init(unit)
 					   implementations */
     wo->neg_mru = 1;
     wo->mru = DEFMRU;
-    wo->neg_asyncmap = 1;
+    wo->neg_asyncmap = 0;
     wo->asyncmap = 0;
     wo->neg_chap = 0;			/* Set to 1 on server */
     wo->neg_upap = 0;			/* Set to 1 on server */
@@ -151,6 +152,8 @@ lcp_init(unit)
     ao->neg_accompression = 1;
     ao->neg_lqr = 0;			/* no LQR implementation yet */
 
+    memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
+    xmit_accm[unit][3] = 0x60000000;
 }
 
 
@@ -192,9 +195,11 @@ lcp_lowerup(unit)
     int unit;
 {
     sifdown(unit);
+    ppp_set_xaccm(unit, xmit_accm[unit]);
     ppp_send_config(unit, MTU, 0xffffffff, 0, 0);
     ppp_recv_config(unit, MTU, 0, 0, 0);
     peer_mru[unit] = MTU;
+    lcp_allowoptions[unit].asyncmap = xmit_accm[unit][0];
 
     fsm_lowerup(&lcp_fsm[unit]);
 }
@@ -1219,7 +1224,7 @@ lcp_up(f)
      * set our MRU to the larger of value we wanted and
      * the value we got in the negotiation.
      */
-    ppp_send_config(f->unit, (ho->neg_mru? MIN(ao->mru, ho->mru): MTU),
+    ppp_send_config(f->unit, MIN(ao->mru, (ho->neg_mru? ho->mru: MTU)),
 		    (ho->neg_asyncmap? ho->asyncmap: 0xffffffff),
 		    ho->neg_pcompression, ho->neg_accompression);
     ppp_recv_config(f->unit, (go->neg_mru? MAX(wo->mru, go->mru): MTU),
@@ -1254,7 +1259,8 @@ lcp_down(f)
     ppp_send_config(f->unit, MTU, 0xffffffff, 0, 0);
     ppp_recv_config(f->unit, MTU, 0, 0, 0);
     peer_mru[f->unit] = MTU;
-    syslog(LOG_NOTICE, "Connection terminated.");
+
+    link_down(f->unit);
 }
 
 
@@ -1279,3 +1285,139 @@ lcp_finished(f)
     link_terminated(f->unit);
 }
 
+
+/*
+ * lcp_printpkt - print the contents of an LCP packet.
+ */
+char *lcp_codenames[] = {
+    "ConfReq", "ConfAck", "ConfNak", "ConfRej",
+    "TermReq", "TermAck", "CodeRej", "ProtRej",
+    "EchoReq", "EchoRep", "DiscReq"
+};
+
+int
+lcp_printpkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int code, id, len, olen;
+    u_char *pstart, *optend;
+    u_short cishort;
+    u_long cilong;
+
+    if (plen < HEADERLEN)
+	return 0;
+    pstart = p;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *))
+	printer(arg, " %s", lcp_codenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= HEADERLEN;
+    switch (code) {
+    case CONFREQ:
+    case CONFACK:
+    case CONFNAK:
+    case CONFREJ:
+	/* print option list */
+	while (len >= 2) {
+	    GETCHAR(code, p);
+	    GETCHAR(olen, p);
+	    p -= 2;
+	    if (olen < 2 || olen > len) {
+		break;
+	    }
+	    printer(arg, " <");
+	    len -= olen;
+	    optend = p + olen;
+	    switch (code) {
+	    case CI_MRU:
+		if (olen == CILEN_SHORT) {
+		    p += 2;
+		    GETSHORT(cishort, p);
+		    printer(arg, "mru %d", cishort);
+		}
+		break;
+	    case CI_ASYNCMAP:
+		if (olen == CILEN_LONG) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "asyncmap 0x%x", cilong);
+		}
+		break;
+	    case CI_AUTHTYPE:
+		if (olen >= CILEN_SHORT) {
+		    p += 2;
+		    printer(arg, "auth ");
+		    GETSHORT(cishort, p);
+		    switch (cishort) {
+		    case UPAP:
+			printer(arg, "upap");
+			break;
+		    case CHAP:
+			printer(arg, "chap");
+			break;
+		    default:
+			printer(arg, "0x%x", cishort);
+		    }
+		}
+		break;
+	    case CI_QUALITY:
+		if (olen >= CILEN_SHORT) {
+		    p += 2;
+		    printer(arg, "quality ");
+		    GETSHORT(cishort, p);
+		    switch (cishort) {
+		    case LQR:
+			printer(arg, "lqr");
+			break;
+		    default:
+			printer(arg, "0x%x", cishort);
+		    }
+		}
+		break;
+	    case CI_MAGICNUMBER:
+		if (olen == CILEN_LONG) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "magic 0x%x", cilong);
+		}
+		break;
+	    case CI_PCOMPRESSION:
+		if (olen == CILEN_VOID) {
+		    p += 2;
+		    printer(arg, "pcomp");
+		}
+		break;
+	    case CI_ACCOMPRESSION:
+		if (olen == CILEN_VOID) {
+		    p += 2;
+		    printer(arg, "accomp");
+		}
+		break;
+	    }
+	    while (p < optend) {
+		GETCHAR(code, p);
+		printer(arg, " %.2x", code);
+	    }
+	    printer(arg, ">");
+	}
+	break;
+    }
+
+    /* print the rest of the bytes in the packet */
+    for (; len > 0; --len) {
+	GETCHAR(code, p);
+	printer(arg, " %.2x", code);
+    }
+
+    return p - pstart;
+}

usr.sbin/pppd/lcp.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: lcp.h,v 1.3 1993/11/10 01:34:17 paulus Exp $
+ * $Id: lcp.h,v 1.4 1994/05/08 12:16:23 paulus Exp $
  */
 
 /*
@@ -27,10 +27,16 @@
 #define CI_AUTHTYPE	3	/* Authentication Type */
 #define CI_QUALITY	4	/* Quality Protocol */
 #define CI_MAGICNUMBER	5	/* Magic Number */
-#define CI_KEEPALIVE	6	/* Keep Alive Parameters - OBSOLETE */
 #define CI_PCOMPRESSION	7	/* Protocol Field Compression */
 #define CI_ACCOMPRESSION 8	/* Address/Control Field Compression */
 
+/*
+ * LCP-specific packet types.
+ */
+#define PROTREJ		8	/* Protocol Reject */
+#define ECHOREQ		9	/* Echo Request */
+#define ECHOREP		10	/* Echo Reply */
+#define DISCREQ		11	/* Discard Request */
 
 /*
  * The state of options is described by an lcp_options structure.
@@ -60,6 +66,7 @@ extern lcp_options lcp_wantoptions[];
 extern lcp_options lcp_gotoptions[];
 extern lcp_options lcp_allowoptions[];
 extern lcp_options lcp_hisoptions[];
+extern u_long xmit_accm[][8];
 
 #define DEFMRU	1500		/* Try for this */
 #define MINMRU	128		/* No MRUs below this */
@@ -73,6 +80,8 @@ void lcp_lowerdown __ARGS((int));
 void lcp_input __ARGS((int, u_char *, int));
 void lcp_protrej __ARGS((int));
 void lcp_sprotrej __ARGS((int, u_char *, int));
+int  lcp_printpkt __ARGS((u_char *, int,
+			  void (*) __ARGS((void *, char *, ...)), void *));
 
 extern int lcp_warnloops;	/* Warn about a loopback this often */
 #define DEFWARNLOOPS	10	/* Default value for above */

usr.sbin/pppd/main.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.8 1994/01/25 05:58:05 paulus Exp $";
+static char rcsid[] = "$Id: main.c,v 1.9 1994/05/08 12:16:24 paulus Exp $";
 #endif
 
 #define SETSID
@@ -30,6 +30,7 @@ static char rcsid[] = "$Id: main.c,v 1.8 1994/01/25 05:58:05 paulus Exp $";
 #include <syslog.h>
 #include <netdb.h>
 #include <utmp.h>
+#include <sys/wait.h>
 
 /*
  * If REQ_SYSOPTIONS is defined to 1, pppd will not run unless
@@ -39,10 +40,6 @@ static char rcsid[] = "$Id: main.c,v 1.8 1994/01/25 05:58:05 paulus Exp $";
 #define REQ_SYSOPTIONS	0
 #endif
 
-#ifdef STREAMS
-#undef SGTTY
-#endif
-
 #ifdef SGTTY
 #include <sgtty.h>
 #else
@@ -115,6 +112,8 @@ int default_device = TRUE;	/* use default device (stdin/out) */
 int fd;				/* Device file descriptor */
 int s;				/* Socket file descriptor */
 
+int phase;			/* where the link is at */
+
 #ifdef SGTTY
 static struct sgttyb initsgttyb;	/* Initial TTY sgttyb */
 #else
@@ -129,14 +128,18 @@ u_char outpacket_buf[MTU+DLLHEADERLEN]; /* buffer for outgoing packet */
 static u_char inpacket_buf[MTU+DLLHEADERLEN]; /* buffer for incoming packet */
 
 int hungup;			/* terminal has been hung up */
+static int n_children;		/* # child processes still running */
 
 /* configured variables */
 
 int debug = 0;		        /* Debug flag */
+int kdebugflag = 0;		/* Kernel debugging flag */
 char user[MAXNAMELEN];		/* username for PAP */
 char passwd[MAXSECRETLEN];	/* password for PAP */
 char *connector = NULL;		/* "connect" command */
-int inspeed = 0;		/* Input/Output speed */
+char *disconnector = NULL;	/* "disconnect" command */
+int inspeed = 0;		/* Input/Output speed requested */
+int baud_rate;			/* bits/sec currently used */
 u_long netmask = 0;		/* netmask to use on ppp interface */
 int crtscts = 0;		/* use h/w flow control */
 int nodetach = 0;		/* don't fork */
@@ -147,6 +150,7 @@ int proxyarp = 0;		/* set entry in arp table */
 int persist = 0;		/* re-initiate on termination */
 int answer = 0;			/* wait for incoming call */
 int uselogin = 0;		/* check PAP info against /etc/passwd */
+int lockflag = 0;		/* lock the serial device */
 
 
 /* prototypes */
@@ -159,13 +163,16 @@ static void incdebug __ARGS((int));
 static void nodebug __ARGS((int));
 void establish_ppp __ARGS((void));
 
+void reap_kids __ARGS((void));
 void cleanup __ARGS((int, caddr_t));
 void die __ARGS((int));
-void dumpbuffer __ARGS((unsigned char *, int, int));
+void novm __ARGS((char *));
+
+void log_packet __ARGS((u_char *, int, char *));
+void format_packet __ARGS((u_char *, int,
+			   void (*) (void *, char *, ...), void *));
+void pr_log __ARGS((void *, char *, ...));
 
-#ifdef	STREAMS
-extern	char	*ttyname __ARGS((int));
-#endif
 extern	char	*getlogin __ARGS((void));
 
 /*
@@ -177,13 +184,16 @@ static struct protent {
     void (*init)();
     void (*input)();
     void (*protrej)();
+    int  (*printpkt)();
+    char *name;
 } prottbl[] = {
-    { LCP, lcp_init, lcp_input, lcp_protrej },
+    { LCP, lcp_init, lcp_input, lcp_protrej, lcp_printpkt, "LCP" },
-    { IPCP, ipcp_init, ipcp_input, ipcp_protrej },
+    { IPCP, ipcp_init, ipcp_input, ipcp_protrej, ipcp_printpkt, "IPCP" },
-    { UPAP, upap_init, upap_input, upap_protrej },
+    { UPAP, upap_init, upap_input, upap_protrej, upap_printpkt, "PAP" },
-    { CHAP, ChapInit, ChapInput, ChapProtocolReject },
+    { CHAP, ChapInit, ChapInput, ChapProtocolReject, ChapPrintPkt, "CHAP" },
 };
 
+#define N_PROTO		(sizeof(prottbl) / sizeof(prottbl[0]))
 
 main(argc, argv)
     int argc;
@@ -195,28 +205,8 @@ main(argc, argv)
     FILE *pidfile;
     char *p;
 
-    /*
-     * Initialize syslog system and magic number package.
-     */
-#if BSD >= 43 || defined(sun)
-    openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
-    setlogmask(LOG_UPTO(LOG_INFO));
-#else
-    openlog("pppd", LOG_PID);
-#define LOG_UPTO(x) (x)
-#define setlogmask(x) (x)
-#endif
-
-#ifdef STREAMS
-    p = ttyname(fileno(stdin));
-    if (p)
-	strcpy(devname, p);
-#endif
-  
-    magic_init();
-
     if (gethostname(hostname, MAXNAMELEN) < 0 ) {
-	syslog(LOG_ERR, "couldn't get hostname: %m");
+	perror("couldn't get hostname");
 	die(1);
     }
     hostname[MAXNAMELEN-1] = 0;
@@ -233,7 +223,7 @@ main(argc, argv)
      * the system options file, the user's options file, and the command
      * line arguments.
      */
-    for (i = 0; i < sizeof (prottbl) / sizeof (struct protent); i++)
+    for (i = 0; i < N_PROTO; i++)
 	(*prottbl[i].init)(0);
   
     progname = *argv;
@@ -245,6 +235,20 @@ main(argc, argv)
     check_auth_options();
     setipdefault();
 
+    if (lockflag && !default_device)
+	if (lock(devname) < 0)
+	    die(1);
+
+    /*
+     * Initialize syslog system and magic number package.
+     */
+    openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
+    setlogmask(LOG_UPTO(LOG_INFO));
+    if (debug)
+	setlogmask(LOG_UPTO(LOG_DEBUG));
+
+    magic_init();
+
     p = getlogin();
     if (p == NULL)
 	p = "(unknown)";
@@ -314,9 +318,6 @@ main(argc, argv)
     sigaddset(&mask, SIGINT);
     sigaddset(&mask, SIGALRM);
     sigaddset(&mask, SIGIO);
-#ifdef	STREAMS
-    sigaddset(&mask, SIGPOLL);
-#endif
 
 #define SIGNAL(s, handler)	{ \
 	sv.sv_handler = handler; \
@@ -333,9 +334,6 @@ main(argc, argv)
     SIGNAL(SIGTERM, term);		/* Terminate */
     SIGNAL(SIGALRM, alrm);		/* Timeout */
     SIGNAL(SIGIO, io);			/* Input available */
-#ifdef	STREAMS
-    SIGNAL(SIGPOLL, io);		/* Input available */
-#endif
 
     signal(SIGUSR1, incdebug);		/* Increment debug flag */
     signal(SIGUSR2, nodebug);		/* Reset debug flag */
@@ -345,9 +343,6 @@ main(argc, argv)
      */
     sigemptyset(&mask);
     sigaddset(&mask, SIGIO);
-#ifdef	STREAMS
-    sigaddset(&mask, SIGPOLL);
-#endif
     sigprocmask(SIG_BLOCK, &mask, NULL);
 
     /*
@@ -359,18 +354,20 @@ main(argc, argv)
     }
     hungup = 0;
 
+#ifdef TIOCSCTTY
     /* set device to be controlling tty */
     if (!default_device && ioctl(fd, TIOCSCTTY) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCSCTTY): %m");
 	die(1);
     }
-
+#endif /* TIOCSCTTY */
-    /* set line speed, flow control, etc. */
-    set_up_tty(fd);
 
     /* run connection script */
     if (connector) {
-	syslog(LOG_INFO, "Connecting with <%s>", connector);
+	MAINDEBUG((LOG_INFO, "Connecting with <%s>", connector));
+
+	/* set line speed, flow control, etc.; set CLOCAL for now */
+	set_up_tty(fd, 1);
 
 	/* drop dtr to hang up in case modem is off hook */
 	if (!default_device && modem) {
@@ -379,7 +376,7 @@ main(argc, argv)
 	    setdtr(fd, TRUE);
 	}
 
-	if (set_up_connection(connector, fd, fd) < 0) {
+	if (device_script(connector, fd, fd) < 0) {
 	    syslog(LOG_ERR, "could not set up connection");
 	    setdtr(fd, FALSE);
 	    die(1);
@@ -389,6 +386,9 @@ main(argc, argv)
 	sleep(1);		/* give it time to set up its terminal */
     }
   
+    /* set line speed, flow control, etc.; clear CLOCAL if modem option */
+    set_up_tty(fd, 0);
+
     /* set up the serial device as a ppp interface */
     establish_ppp();
 
@@ -450,9 +450,24 @@ main(argc, argv)
     sigprocmask(SIG_BLOCK, &mask, NULL); /* Block signals now */
     lcp_lowerup(0);		/* XXX Well, sort of... */
     lcp_open(0);		/* Start protocol */
-    for (;;) {
+    for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) {
 	sigpause(0);		/* Wait for next signal */
+	reap_kids();		/* Don't leave dead kids lying around */
     }
+
+    /*
+     * Run disconnector script, if requested
+     */
+    if (disconnector) {
+	if (device_script(disconnector, fd, fd) < 0) {
+	    syslog(LOG_WARNING, "disconnect script failed");
+	    die(1);
+	}
+
+	syslog(LOG_INFO, "Disconnected...");
+    }
+
+    quit();
 }
 
 #if B9600 == 9600
@@ -461,6 +476,7 @@ main(argc, argv)
  * (so we can ask for any speed).
  */
 #define translate_speed(bps)	(bps)
+#define baud_rate_of(speed)	(speed)
 
 #else
 /*
@@ -555,14 +571,32 @@ translate_speed(bps)
     syslog(LOG_WARNING, "speed %d not supported", bps);
     return 0;
 }
+
+/*
+ * Translate from a speed_t to bits/second.
+ */
+int
+baud_rate_of(speed)
+    int speed;
+{
+    struct speed *speedp;
+
+    if (speed == 0)
+	return 0;
+    for (speedp = speeds; speedp->speed_int; speedp++)
+	if (speed == speedp->speed_val)
+	    return speedp->speed_int;
+    return 0;
+}
 #endif
 
 /*
  * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
- * at the requested speed, etc.
+ * at the requested speed, etc.  If `local' is true, set CLOCAL
+ * regardless of whether the modem option was specified.
  */
-set_up_tty(fd)
+set_up_tty(fd, local)
-    int fd;
+    int fd, local;
 {
 #ifndef SGTTY
     int speed;
@@ -576,11 +610,16 @@ set_up_tty(fd)
     if (!restore_term)
 	inittermios = tios;
 
+#ifdef CRTSCTS
     tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL | CRTSCTS);
-    tios.c_cflag |= CS8 | CREAD | HUPCL;
     if (crtscts)
 	tios.c_cflag |= CRTSCTS;
-    if (!modem)
+#else
+    tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
+#endif	/* CRTSCTS */
+
+    tios.c_cflag |= CS8 | CREAD | HUPCL;
+    if (local || !modem)
 	tios.c_cflag |= CLOCAL;
     tios.c_iflag = IGNBRK | IGNPAR;
     tios.c_oflag = 0;
@@ -591,12 +630,15 @@ set_up_tty(fd)
     if (speed) {
 	cfsetospeed(&tios, speed);
 	cfsetispeed(&tios, speed);
+    } else {
+	speed = cfgetospeed(&tios);
     }
 
     if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
 	syslog(LOG_ERR, "tcsetattr: %m");
 	die(1);
     }
+
 #else	/* SGTTY */
     int speed;
     struct sgttyb sgttyb;
@@ -616,15 +658,31 @@ set_up_tty(fd)
     speed = translate_speed(inspeed);
     if (speed)
 	sgttyb.sg_ispeed = speed;
+    else
+	speed = sgttyb.sg_ispeed;
 
     if (ioctl(fd, TIOCSETP, &sgttyb) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCSETP): %m");
 	die(1);
     }
 #endif
+
+    baud_rate = baud_rate_of(speed);
     restore_term = TRUE;
 }
 
+/*
+ * setdtr - control the DTR line on the serial port.
+ * This is called from die(), so it shouldn't call die().
+ */
+setdtr(fd, on)
+int fd, on;
+{
+    int modembits = TIOCM_DTR;
+
+    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+}
+
 
 /*
  * quit - Clean up state and exit.
@@ -656,23 +714,23 @@ cleanup(status, arg)
     int status;
     caddr_t arg;
 {
-    if (fd != 0) {
+    if (fd >= 0) {
 	/* drop dtr to hang up */
 	if (modem)
 	    setdtr(fd, FALSE);
 
 	if (fcntl(fd, F_SETFL, initfdflags) < 0)
-	    syslog(LOG_ERR, "fcntl(F_SETFL, fdflags): %m");
+	    syslog(LOG_WARNING, "fcntl(F_SETFL, fdflags): %m");
 
 	disestablish_ppp();
 
 	if (restore_term) {
 #ifndef SGTTY
 	    if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
-		syslog(LOG_ERR, "tcsetattr: %m");
+		syslog(LOG_WARNING, "tcsetattr: %m");
 #else
 	    if (ioctl(fd, TIOCSETP, &initsgttyb) < 0)
-		syslog(LOG_ERR, "ioctl(TIOCSETP): %m");
+		syslog(LOG_WARNING, "ioctl(TIOCSETP): %m");
 #endif
 	}
 
@@ -683,6 +741,9 @@ cleanup(status, arg)
     if (pidfilename[0] != 0 && unlink(pidfilename) < 0) 
 	syslog(LOG_WARNING, "unable to unlink pid file: %m");
     pidfilename[0] = 0;
+
+    if (lockflag && !default_device)
+	unlock();
 }
 
 
@@ -739,7 +800,7 @@ timeout(func, arg, time)
 	itv.it_interval.tv_sec = itv.it_interval.tv_usec =
 	    itv.it_value.tv_usec = 0;
 	itv.it_value.tv_sec = callout->c_time;
-	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds.",
+	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds in timeout.",
 		   itv.it_value.tv_sec));
 	if (setitimer(ITIMER_REAL, &itv, NULL)) {
 	    syslog(LOG_ERR, "setitimer(ITIMER_REAL): %m");
@@ -795,7 +856,7 @@ untimeout(func, arg)
 	itv.it_interval.tv_sec = itv.it_interval.tv_usec =
 	    itv.it_value.tv_usec = 0;
 	itv.it_value.tv_sec = callout ? callout->c_time : 0;
-	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds.",
+	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds in untimeout.",
 		   itv.it_value.tv_sec));
 	if (setitimer(ITIMER_REAL, &itv, NULL)) {
 	    syslog(LOG_ERR, "setitimer(ITIMER_REAL): %m");
@@ -912,22 +973,22 @@ alrm(sig, code, scp, addr)
     char *addr;
 {
     struct itimerval itv;
-    struct callout *freep;
+    struct callout *freep, *list, *last;
 
     MAINDEBUG((LOG_DEBUG, "Alarm"));
 
+    if (callout == NULL)
+	return;
     /*
-     * Call and free first scheduled timeout and any that were scheduled
+     * Get the first scheduled timeout and any that were scheduled
-     * for the same time.
+     * for the same time as a list, and remove them all from callout
+     * list.
      */
-    while (callout) {
+    list = last = callout;
-	freep = callout;	/* Remove entry before calling */
+    while (last->c_next != NULL && last->c_next->c_time == 0)
-	callout = freep->c_next;
+	last = last->c_next;
-	(*freep->c_func)(freep->c_arg);
+    callout = last->c_next;
-	(void) free((char *) freep);
+    last->c_next = NULL;
-	if (callout && callout->c_time)
-	    break;
-    }
 
     /*
      * Set a new itimer if there are more timeouts scheduled.
@@ -936,7 +997,7 @@ alrm(sig, code, scp, addr)
 	itv.it_interval.tv_sec = itv.it_interval.tv_usec = 0;
 	itv.it_value.tv_usec = 0;
 	itv.it_value.tv_sec = callout->c_time;
-	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds.",
+	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds in alrm.",
 		   itv.it_value.tv_sec));
 	if (setitimer(ITIMER_REAL, &itv, NULL)) {
 	    syslog(LOG_ERR, "setitimer(ITIMER_REAL): %m");
@@ -947,6 +1008,17 @@ alrm(sig, code, scp, addr)
 	    die(1);
 	}
     }
+
+    /*
+     * Now call all the timeout routines scheduled for this time.
+     */
+    while (list) {
+	(*list->c_func)(list->c_arg);
+	freep = list;
+	list = list->c_next;
+	(void) free((char *) freep);
+    }
+  
 }
 
 
@@ -1000,10 +1072,13 @@ io(sig, code, scp, addr)
 	    return;
 
 	if (len == 0) {
-	    syslog(LOG_ERR, "End of file on fd!");
+	    syslog(LOG_WARNING, "End of file on fd!");
 	    die(1);
 	}
 
+	if (debug /*&& (debugflags & DBG_INPACKET)*/)
+	    log_packet(p, len, "rcvd ");
+
 	if (len < DLLHEADERLEN) {
 	    MAINDEBUG((LOG_INFO, "io(): Received short packet."));
 	    return;
@@ -1019,8 +1094,6 @@ io(sig, code, scp, addr)
 	if (protocol != LCP && lcp_fsm[0].state != OPENED) {
 	    MAINDEBUG((LOG_INFO,
 		       "io(): Received non-LCP packet when LCP not open."));
-	    if (debug)
-		dumpbuffer(inpacket_buf, len + DLLHEADERLEN, LOG_INFO);
 	    return;
 	}
 
@@ -1098,10 +1171,11 @@ nodebug(sig)
 
 
 /*
- * set_up_connection - run a program to initialize the serial connector
+ * device_script - run a program to connect or disconnect the
+ * serial device.
  */
 int
-set_up_connection(program, in, out)
+device_script(program, in, out)
     char *program;
     int in, out;
 {
@@ -1133,10 +1207,10 @@ set_up_connection(program, in, out)
 	/* NOTREACHED */
     }
 
-    while (waitpid(pid, &status, 0) != pid) {
+    while (waitpid(pid, &status, 0) < 0) {
 	if (errno == EINTR)
 	    continue;
-	syslog(LOG_ERR, "waiting for connection process: %m");
+	syslog(LOG_ERR, "waiting for (dis)connection process: %m");
 	die(1);
     }
     sigprocmask(SIG_SETMASK, &mask, NULL);
@@ -1146,82 +1220,154 @@ set_up_connection(program, in, out)
 
 
 /*
- * Return user specified netmask. A value of zero means no netmask has
+ * run-program - execute a program with given arguments,
- * been set. 
+ * but don't wait for it.
+ * If the program can't be executed, logs an error unless
+ * must_exist is 0 and the program file doesn't exist.
  */
-/* ARGSUSED */
+int
-u_long
+run_program(prog, args, must_exist)
-GetMask(addr)
+    char *prog;
-    u_long addr;
+    char **args;
+    int must_exist;
 {
-    return(netmask);
+    int pid;
+
+    pid = fork();
+    if (pid == -1) {
+	syslog(LOG_ERR, "can't fork to run %s: %m", prog);
+	return -1;
+    }
+    if (pid == 0) {
+	execv(prog, args);
+	if (must_exist || errno != ENOENT)
+	    syslog(LOG_WARNING, "can't execute %s: %m", prog);
+	_exit(-1);
+    }
+    MAINDEBUG((LOG_DEBUG, "Script %s started; pid = %d", prog, pid));
+    ++n_children;
+    return 0;
 }
 
+
 /*
- * dumpbuffer - print contents of a buffer in hex to standard output.
+ * reap_kids - get status from any dead child processes,
+ * and log a message for abnormal terminations.
  */
 void
-dumpbuffer(buffer, size, level)
+reap_kids()
-    unsigned char *buffer;
-    int size;
-    int level;
 {
-    register int i;
+    int pid, status;
-    char line[256], *p;
 
-    printf("%d bytes:\n", size);
+    if (n_children == 0)
-    while (size > 0)
+	return;
-    {
+    if ((pid = waitpid(-1, &status, WNOHANG)) == -1) {
-	p = line;
+	if (errno != ECHILD)
-	sprintf(p, "%08lx: ", buffer);
+	    syslog(LOG_ERR, "waitpid: %m");
-	p += 10;
+	return;
-		
+    }
-	for (i = 0; i < 8; i++, p += 3)
+    if (pid > 0) {
-	    if (size - i <= 0)
+	--n_children;
-		sprintf(p, "xx ");
+	if (WIFSIGNALED(status)) {
-	    else
+	    syslog(LOG_WARNING, "child process %d terminated with signal %d",
-		sprintf(p, "%02x ", buffer[i]);
+		   pid, WTERMSIG(status));
-
+	}
-	for (i = 0; i < 8; i++)
-	    if (size - i <= 0)
-		*p++ = 'x';
-	    else
-		*p++ = (' ' <= buffer[i] && buffer[i] <= '~') ?
-		    buffer[i] : '.';
-
-	*p++ = 0;
-	buffer += 8;
-	size -= 8;
-
-/*	syslog(level, "%s\n", line); */
-	printf("%s\n", line);
-	fflush(stdout);
     }
 }
 
 
 /*
- * setdtr - control the DTR line on the serial port.
+ * log_packet - format a packet and log it.
- * This is called from die(), so it shouldn't call die().
  */
-setdtr(fd, on)
-int fd, on;
-{
-    int modembits = TIOCM_DTR;
 
-    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+char line[256];			/* line to be logged accumulated here */
+char *linep;
+
+void
+log_packet(p, len, prefix)
+    u_char *p;
+    int len;
+    char *prefix;
+{
+    strcpy(line, prefix);
+    linep = line + strlen(line);
+    format_packet(p, len, pr_log, NULL);
+    if (linep != line)
+	syslog(LOG_DEBUG, "%s", line);
 }
 
+/*
+ * format_packet - make a readable representation of a packet,
+ * calling `printer(arg, format, ...)' to output it.
+ */
+void
+format_packet(p, len, printer, arg)
+    u_char *p;
+    int len;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int i, n;
+    u_short proto;
+    u_char x;
+
+    if (len >= DLLHEADERLEN && p[0] == ALLSTATIONS && p[1] == UI) {
+	p += 2;
+	GETSHORT(proto, p);
+	len -= DLLHEADERLEN;
+	for (i = 0; i < N_PROTO; ++i)
+	    if (proto == prottbl[i].protocol)
+		break;
+	if (i < N_PROTO) {
+	    printer(arg, "[%s", prottbl[i].name);
+	    n = (*prottbl[i].printpkt)(p, len, printer, arg);
+	    printer(arg, "]");
+	    p += n;
+	    len -= n;
+	} else {
+	    printer(arg, "[proto=0x%x]", proto);
+	}
+    }
+
+    for (; len > 0; --len) {
+	GETCHAR(x, p);
+	printer(arg, " %.2x", x);
+    }
+}
+
+#ifdef __STDC__
+#include <stdarg.h>
+
+void
+pr_log(void *arg, char *fmt, ...)
+{
+    int n;
+    va_list pvar;
+    char buf[256];
+
+    va_start(pvar, fmt);
+    vsprintf(buf, fmt, pvar);
+    va_end(pvar);
+
+    n = strlen(buf);
+    if (linep + n + 1 > line + sizeof(line)) {
+	syslog(LOG_DEBUG, "%s", line);
+	linep = line;
+    }
+    strcpy(linep, buf);
+    linep += n;
+}
+
+#else /* __STDC__ */
 #include <varargs.h>
 
-char line[256];
+void
-char *p;
+pr_log(arg, fmt, va_alist)
-
+void *arg;
-logf(level, fmt, va_alist)
-int level;
 char *fmt;
 va_dcl
 {
+    int n;
     va_list pvar;
     char buf[256];
 
@@ -1229,15 +1375,43 @@ va_dcl
     vsprintf(buf, fmt, pvar);
     va_end(pvar);
 
-    p = line + strlen(line);
+    n = strlen(buf);
-    strcat(p, buf);
+    if (linep + n + 1 > line + sizeof(line)) {
-
+	syslog(LOG_DEBUG, "%s", line);
-    if (buf[strlen(buf)-1] == '\n') {
+	linep = line;
-	syslog(level, "%s", line);
-	line[0] = 0;
     }
+    strcpy(linep, buf);
+    linep += n;
+}
+#endif
+
+/*
+ * print_string - print a readable representation of a string using
+ * printer.
+ */
+void
+print_string(p, len, printer, arg)
+    char *p;
+    int len;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int c;
+
+    printer(arg, "\"");
+    for (; len > 0; --len) {
+	c = *p++;
+	if (' ' <= c && c <= '~')
+	    printer(arg, "%c", c);
+	else
+	    printer(arg, "\\%.3o", c);
+    }
+    printer(arg, "\"");
 }
 
+/*
+ * novm - log an error message saying we ran out of memory, and die.
+ */
 void
 novm(msg)
     char *msg;

usr.sbin/pppd/options.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: options.c,v 1.5 1994/02/22 00:12:01 paulus Exp $";
+static char rcsid[] = "$Id: options.c,v 1.6 1994/05/08 12:16:26 paulus Exp $";
 #endif
 
 #include <stdio.h>
@@ -45,11 +45,11 @@ static char rcsid[] = "$Id: options.c,v 1.5 1994/02/22 00:12:01 paulus Exp $";
 #define FALSE	0
 #define TRUE	1
 
-
 /*
  * Prototypes
  */
 static int setdebug __ARGS((void));
+static int setkdebug __ARGS((char **));
 static int setpassive __ARGS((void));
 static int setsilent __ARGS((void));
 static int noopt __ARGS((void));
@@ -65,16 +65,20 @@ static int noasyncmap __ARGS((void));
 static int noipaddr __ARGS((void));
 static int nomagicnumber __ARGS((void));
 static int setasyncmap __ARGS((char **));
+static int setescape __ARGS((char **));
 static int setmru __ARGS((char **));
+static int setmtu __ARGS((char **));
 static int nomru __ARGS((void));
 static int nopcomp __ARGS((void));
 static int setconnector __ARGS((char **));
+static int setdisconnector __ARGS((char **));
 static int setdomain __ARGS((char **));
 static int setnetmask __ARGS((char **));
 static int setcrtscts __ARGS((void));
 static int setnodetach __ARGS((void));
 static int setmodem __ARGS((void));
 static int setlocal __ARGS((void));
+static int setlock __ARGS((void));
 static int setname __ARGS((char **));
 static int setuser __ARGS((char **));
 static int setremote __ARGS((char **));
@@ -110,10 +114,13 @@ static int number_option __ARGS((char *, long *, int));
  */
 extern char *progname;
 extern int debug;
+extern int kdebugflag;
 extern int modem;
+extern int lockflag;
 extern int crtscts;
 extern int nodetach;
 extern char *connector;
+extern char *disconnector;
 extern int inspeed;
 extern char devname[];
 extern int default_device;
@@ -156,16 +163,21 @@ static struct cmd {
     "-chap", 0, nochap,		/* Don't allow CHAP authentication with peer */
     "-vj", 0, setnovj,		/* disable VJ compression */
     "asyncmap", 1, setasyncmap,	/* set the desired async map */
+    "escape", 1, setescape,	/* set chars to escape on transmission */
     "connect", 1, setconnector,	/* A program to set up a connection */
+    "disconnect", 1, setdisconnector,	/* program to disconnect serial dev. */
     "crtscts", 0, setcrtscts,	/* set h/w flow control */
     "debug", 0, setdebug,	/* Increase debugging level */
+    "kdebug", 1, setkdebug,	/* Enable kernel-level debugging */
     "domain", 1, setdomain,	/* Add given domain name to hostname*/
     "mru", 1, setmru,		/* Set MRU value for negotiation */
+    "mtu", 1, setmtu,		/* Set our MTU */
     "netmask", 1, setnetmask,	/* set netmask */
     "passive", 0, setpassive,	/* Set passive mode */
     "silent", 0, setsilent,	/* Set silent mode */
     "modem", 0, setmodem,	/* Use modem control lines */
     "local", 0, setlocal,	/* Don't use modem control lines */
+    "lock", 0, setlock,		/* Lock serial device (with lock file) */
     "name", 1, setname,		/* Set local name for authentication */
     "user", 1, setuser,		/* Set username for PAP auth with peer */
     "usehostname", 0, setusehostname,	/* Must use hostname for auth. */
@@ -215,34 +227,6 @@ Usage: %s [ arguments ], where arguments are:\n\
 See pppd(8) for more options.\n\
 ";
 
-/*
-Options omitted:
-	-all		Don't request/allow any options\n\
-	-ac		Disable Address/Control compression\n\
-	-am		Disable asyncmap negotiation\n\
-	-as <n>		Set the desired async map to hex <n>\n\
-	-d		Increase debugging level\n\
-	-detach		Don't fork to background\n\
-	-ip		Disable IP address negotiation\n\
-	-mn		Disable magic number negotiation\n\
-	-mru		Disable mru negotiation\n\
-	-p		Set passive mode\n\
-	-pc		Disable protocol field compression\n\
-	+ua <f>		Get username and password for authenticating\n\
-			with peer using PAP from file <f>\n\
-	+pap		Require PAP authentication from peer\n\
-	-pap		Don't agree to authenticating with peer using PAP\n\
-	+chap		Require CHAP authentication from peer\n\
-	-chap		Don't agree to authenticating with peer using CHAP\n\
-        -vj             disable VJ compression\n\
-	-auth		Don't agree to authenticate with peer\n\
-	debug		Increase debugging level\n\
-        domain <d>      Append domain name <d> to hostname for authentication\n\
-	passive		Set passive mode\n\
-	local		Don't use modem control lines\n\
-	proxyarp	Add proxy ARP entry\n\
-*/
-
 
 /*
  * parse_args - parse a string of arguments, from the command
@@ -319,7 +303,7 @@ options_from_file(filename, must_exist)
 	if (!must_exist && errno == ENOENT)
 	    return 1;
 	perror(filename);
-	exit(1);
+	return 0;
     }
     while (getword(f, cmd, &newline, filename)) {
 	/*
@@ -549,10 +533,19 @@ static int
 setdebug()
 {
     debug++;
-    setlogmask(LOG_UPTO(LOG_DEBUG));
     return (1);
 }
 
+/*
+ * setkdebug - Set kernel debugging level.
+ */
+static int
+setkdebug(argv)
+    char **argv;
+{
+    return int_option(*argv, &kdebugflag);
+}
+
 /*
  * noopt - Disable all options.
  */
@@ -643,6 +636,27 @@ setmru(argv)
 }
 
 
+/*
+ * setmru - Set the largest MTU we'll use.
+ */
+static int
+setmtu(argv)
+    char **argv;
+{
+    long mtu;
+
+    if (!number_option(*argv, &mtu, 0))
+	return 0;
+    if (mtu < MINMRU || mtu > MAXMRU) {
+	fprintf(stderr, "mtu option value of %d is too %s\n", mtu,
+		(mtu < MINMRU? "small": "large"));
+	return 0;
+    }
+    lcp_allowoptions[0].mru = mtu;
+    return (1);
+}
+
+
 /*
  * nopcomp - Disable Protocol field compression negotiation.
  */
@@ -716,7 +730,7 @@ setupapfile(argv)
     /* open user info file */
     if ((ufile = fopen(*argv, "r")) == NULL) {
 	fprintf(stderr, "unable to open user login data file %s\n", *argv);
-	exit(1);
+	return 0;
     }
     check_access(ufile, *argv);
 
@@ -724,7 +738,7 @@ setupapfile(argv)
     if (fgets(user, MAXNAMELEN - 1, ufile) == NULL
 	|| fgets(passwd, MAXSECRETLEN - 1, ufile) == NULL){
 	fprintf(stderr, "Unable to read user login data file %s.\n", *argv);
-	exit(2);
+	return 0;
     }
     fclose(ufile);
 
@@ -788,6 +802,20 @@ setconnector(argv)
     return (1);
 }
 
+/*
+ * setdisconnector - Set a program to disconnect from the serial line
+ */
+static int
+setdisconnector(argv)
+    char **argv;
+{
+    disconnector = strdup(*argv);
+    if (disconnector == NULL)
+	novm("disconnector string");
+  
+    return (1);
+}
+
 
 /*
  * setdomain - Set domain name to append to hostname 
@@ -801,6 +829,10 @@ setdomain(argv)
     return (1);
 }
 
+
+/*
+ * setasyncmap - add bits to asyncmap (what we request peer to escape).
+ */
 static int
 setasyncmap(argv)
     char **argv;
@@ -814,6 +846,38 @@ setasyncmap(argv)
     return(1);
 }
 
+
+/*
+ * setescape - add chars to the set we escape on transmission.
+ */
+static int
+setescape(argv)
+    char **argv;
+{
+    int n, ret;
+    char *p, *endp;
+
+    p = *argv;
+    ret = 1;
+    while (*p) {
+	n = strtol(p, &endp, 16);
+	if (p == endp) {
+	    fprintf(stderr, "%s: invalid hex number: %s\n", progname, p);
+	    return 0;
+	}
+	p = endp;
+	if (n < 0 || 0x20 <= n && n <= 0x3F || n == 0x5E || n > 0xFF) {
+	    fprintf(stderr, "%s: can't escape character 0x%x\n", n);
+	    ret = 0;
+	} else
+	    xmit_accm[0][n >> 5] |= 1 << (n & 0x1F);
+	while (*p == ',' || *p == ' ')
+	    ++p;
+    }
+    return ret;
+}
+
+
 /*
  * setspeed - Set the speed.
  */
@@ -857,7 +921,7 @@ setdevname(cp)
 	if (errno == ENOENT)
 	    return (0);
 	syslog(LOG_ERR, cp);
-	exit(1);
+	return 0;
     }
   
     (void) strncpy(devname, cp, MAXPATHLEN);
@@ -1006,13 +1070,26 @@ setnetmask(argv)
 	
     if ((mask = inet_addr(*argv)) == -1) {
 	fprintf(stderr, "Invalid netmask %s\n", *argv);
-	exit(1);
+	return 0;
     }
 
     netmask = mask;
     return (1);
 }
 
+/*
+ * Return user specified netmask. A value of zero means no netmask has
+ * been set. 
+ */
+/* ARGSUSED */
+u_long
+GetMask(addr)
+    u_long addr;
+{
+    return(netmask);
+}
+
+
 static int
 setcrtscts()
 {
@@ -1041,6 +1118,13 @@ setlocal()
     return 1;
 }
 
+static int
+setlock()
+{
+    lockflag = 1;
+    return 1;
+}
+
 static int
 setusehostname()
 {

usr.sbin/pppd/patchlevel.h

@@ -1,5 +1,5 @@
-/* $Id: patchlevel.h,v 1.6 1994/02/22 00:12:03 paulus Exp $ */
+/* $Id: patchlevel.h,v 1.7 1994/05/08 12:16:27 paulus Exp $ */
-#define	PATCHLEVEL	4
+#define	PATCHLEVEL	0
 
-#define VERSION	"2.0"
+#define VERSION	"2.1"
-#define DATE	"9 Feb 94"
+#define DATE	"1 May 94"

usr.sbin/pppd/pathnames.h

@@ -1,10 +1,10 @@
 /*
  * define path names
  *
- * $Id: pathnames.h,v 1.4 1993/11/10 01:34:26 paulus Exp $
+ * $Id: pathnames.h,v 1.5 1994/05/08 12:16:28 paulus Exp $
  */
 
-#ifdef STREAMS
+#if defined(STREAMS) || defined(ultrix)
 #define _PATH_PIDFILE 	"/etc/ppp"
 #else
 #define _PATH_PIDFILE 	"/var/run"
@@ -13,3 +13,5 @@
 #define _PATH_UPAPFILE 	"/etc/ppp/pap-secrets"
 #define _PATH_CHAPFILE 	"/etc/ppp/chap-secrets"
 #define _PATH_SYSOPTIONS "/etc/ppp/options"
+#define _PATH_IPUP	"/etc/ppp/ip-up"
+#define _PATH_IPDOWN	"/etc/ppp/ip-down"

usr.sbin/pppd/pppd.8

@@ -1,5 +1,5 @@
 .\" manual page [] for pppd 2.0
-.\" $Id: pppd.8,v 1.5 1994/02/22 00:12:04 paulus Exp $
+.\" $Id: pppd.8,v 1.6 1994/05/08 12:16:29 paulus Exp $
 .\" SH section heading
 .\" SS subsection heading
 .\" LP paragraph
@@ -50,20 +50,23 @@ Set the async character map to <map>.
 This map describes which control characters cannot be successfully
 received over the serial line.
 .I pppd
-will ask the peer to send these characters as a 2-byte "escape" sequence.
+will ask the peer to send these characters as a 2-byte escape sequence.
 The argument is a 32 bit hex number
 with each bit representing a character to escape. 
 Bit 0 (00000001) represents the character 0x00;
 bit 31 (80000000) represents the character 0x1f or ^_.
-The default asyncmap is 0.  If multiple \fBasyncmap\fR options are
+If multiple \fBasyncmap\fR options are
 given, the values are ORed together.
+If no \fBasyncmap\fR option is given, no async character map will be
+negotiated for the receive direction; the peer will then escape
+\fIall\fR control characters.
 .TP
 .B auth
 Require the peer to authenticate itself before allowing network
 packets to be sent or received.
 .TP
 .B connect \fI<p>
-Use the executable or shell command specified by <p> to set up the
+Use the executable or shell command specified by \fI<p>\fR to set up the
 serial line.  This script would typically use the "chat" program to
 dial the modem and start the remote ppp session.
 .TP
@@ -76,14 +79,33 @@ Add a default route to the system routing tables, using the peer as
 the gateway, when IPCP negotiation is successfully completed.
 This entry is removed when the PPP connection is broken.
 .TP
+.B disconnect \fI<p>
+Run the executable or shell command specified by \fI<p>\fR after
+\fIpppd\fR has terminated the link.  This script could, for example,
+issue commands to the modem to cause it to hang up.
+.TP
+.B escape \fIxx,yy,...
+Specifies that certain characters should be escaped on transmission
+(regardless of whether the peer requests them to be escaped with its
+async control character map).  The characters to be escaped are
+specified as a list of hex numbers separated by commas.  Note that
+almost any character can be specified for the \fBescape\fR option,
+unlike the \fBasyncmap\fR option which only allows control characters
+to be specified.  The characters which may not be escaped are those
+with hex values 0x20 - 0x3f or 0x5e.
+.TP
 .B file \fI<f>
 Read options from file <f> (the format is described below).
 .TP
+.B lock
+Specifies that \fIpppd\fR should use a UUCP-style lock on the serial
+device to ensure exclusive access to the device.
+.TP
 .B mru \fI<n>
 Set the MRU [Maximum Receive Unit] value to <n> for negotiation.
 .I pppd
 will ask the peer to send packets of no more than <n> bytes.
- The minimum MRU value is 128. 
+The minimum MRU value is 128. 
 The default MRU value is 1500.  A value of 296 is recommended for slow
 links (40 bytes for TCP/IP header + 256 bytes of data).
 .TP
@@ -132,17 +154,18 @@ default values).
 .TP
 .B -ac
 Disable Address/Control compression negotiation (use default, i.e.
-disabled).
+address/control field disabled).
 .TP
 .B -am
-Disable asyncmap negotiation (use default, i.e. 0xffffffff).
+Disable asyncmap negotiation (use the default asyncmap, i.e. escape
+all control characters).
 .TP
 .B -as \fI<n>
 Same as
 .B asyncmap \fI<n>
 .TP
 .B -d
-Increase debugging level.
+Increase debugging level (same as the \fBdebug\fR option).
 .TP
 .B -detach
 Don't fork to become a background process (otherwise
@@ -168,7 +191,8 @@ Same as the
 option.
 .TP
 .B -pc
-Disable protocol field compression negotiation (use default, i.e. disabled).
+Disable protocol field compression negotiation (use default, i.e.
+protocol field compression disabled).
 .TP
 .B +ua \fI<p>
 Agree to authenticate using PAP [Password Authentication Protocol] if
@@ -196,9 +220,13 @@ Disable negotiation of Van Jacobson style IP header compression (use
 default, i.e. no compression).
 .TP
 .B debug
-Increase debugging level (same as
+Increase debugging level (same as \fB\-d\fR).
-.B -d
+If this
-).
+option is given, \fIpppd\fR will log the contents of all control
+packets sent or received in a readable form.  The packets are logged
+through syslog with facility \fIdaemon\fR and level \fIdebug\fR.  This
+information can be directed to a file by setting up /etc/syslog.conf
+appropriately (see syslog.conf(5)).
 .TP
 .B domain \fI<d>
 Append the domain name <d> to the local host name for authentication
@@ -209,9 +237,22 @@ domain option to set the domain name to Quotron.COM.
 .B modem
 Use the modem control lines.  (This option is not fully implemented.)
 .TP
+.B kdebug \fIn
+Enable debugging code in the kernel-level PPP driver.  The argument
+\fIn\fR is a number which is the sum of the following values: 1 to
+enable general debug messages, 2 to request that the contents of
+received packets be printed, and 4 to request that the contents of
+transmitted packets be printed.
+.TP
 .B local
 Don't use the modem control lines.
 .TP
+.B mtu \fI<n>
+Set the MTU [Maximum Transmit Unit] value to \fI<n>\fR.  Unless the
+peer requests a smaller value via MRU negotiation, \fIpppd\fR will
+request that the kernel networking code send data packets of no more
+than \fIn\fR bytes through the PPP network interface. 
+.TP
 .B name \fI<n>
 Set the name of the local system for authentication purposes to <n>.
 .TP
@@ -429,6 +470,16 @@ other Network Control Protocol) can be started.  If authentication
 fails, \fIpppd\fR will terminated the link (by closing LCP).  If IPCP
 negotiates an unacceptable IP address for the remote host, IPCP will
 be closed.  IP packets can only be sent or received when IPCP is open.
+.LP
+In some cases it is desirable to allow some hosts which can't
+authenticate themselves to connect and use one of a restricted set of
+IP addresses, even when the local host generally requires
+authentication.  If the peer refuses to authenticate itself when
+requested, \fIpppd\fR takes that as equivalent to authenticating with
+PAP using the empty string for the username and password.  Thus, by
+adding a line to the pap-secrets file which specifies the empty string
+for the client and password, it is possible to allow restricted access
+to hosts which refuse to authenticate themselves.
 .SH ROUTING
 .LP
 When IPCP negotiation is completed successfully,
@@ -483,29 +534,34 @@ for example:
 pppd /dev/ttya 38400 connect 'chat "" "" "login:" "username"
 "Password:" "password" "% " "exec pppd passive"'
 .LP
+(Note however that running chat like this will leave the password
+visible in the parameter list of pppd and chat.)
+.LP
 If your serial connection is any more complicated than a piece of
 wire, you may need to arrange for some control characters to be
 escaped.  In particular, it is often useful to escape XON (^Q) and
 XOFF (^S), using \fBasyncmap a0000\fR.  If the path includes a telnet,
 you probably should escape ^] as well (\fBasyncmap 200a0000\fR).
-Don't use an rlogin in the path - many implementations are not
+If the path includes an rlogin, you will need to use the \fBescape
+ff\fR option on the end which is running the rlogin client, since many
+rlogin implementations are not
 transparent; they will remove the sequence [0xff, 0xff, 0x73, 0x73,
 followed by any 8 bytes] from the stream.
 .SH DIAGNOSTICS
 .LP
-Messages are sent to the syslog daemon using facility
+Messages are sent to the syslog daemon using facility LOG_DAEMON.
-LOG_DAEMON unless
+(This can be overriden by recompiling \fIpppd\fR with the macro
-.I pppd
+LOG_PPP defined as the desired facility.)  In order to see the error
-has been compiled with debugging code.  In this case the logging
+and debug messages, you will need to edit your /etc/syslog.conf file
-facility used will be LOG_LOCAL2 in order to allow separation of the debug
+to direct the messages to the desired output device or file.
-output from the other daemons using the  LOG_DAEMON facility.  You can
-override this by defining the macro LOG_PPP to the desired facility
-and recompiling.  In order to see the error and debug messages, you
-will need to edit your /etc/syslog.conf file to direct the messages to
-the desired output device or file.
 .LP
-If enabled at compile time, debugging printout can be enabled by
+The \fBdebug\fR option causes the contents of all control packets sent
-setting the -d or debug flag on the command line, or by sending a
+or received to be logged, that is, all LCP, PAP, CHAP or IPCP packets.
+This can be useful if the PPP negotiation does not succeed.
+If debugging is enabled at compile time, the \fBdebug\fR option also
+causes other debugging messages to be logged.
+.LP
+Debugging can also be enabled by sending a
 SIGUSR1 to the
 .I pppd
 process.
@@ -542,12 +598,6 @@ Rivest, R.
 .I The MD5 Message-Digest Algorithm.
 1992 April.
 .TP
-.B RFC1331
-Simpson, W.A.
-.I Point\-to\-Point Protocol (PPP) for the transmission of multi\-protocol
-.I datagrams over point\-to\-point links.
-1992 May.
-.TP
 .B RFC1332
 McGregor, G.
 .I PPP Internet Protocol Control Protocol (IPCP).
@@ -557,6 +607,16 @@ McGregor, G.
 Lloyd, B.; Simpson, W.A.
 .I PPP authentication protocols.
 1992 October.
+.TP
+.B RFC1548
+Simpson, W.A.
+.I The Point\-to\-Point Protocol (PPP).
+1993 December.
+.TP
+.B RFC1549
+Simpson, W.A.
+.I PPP in HDLC Framing.
+1993 December
 .SH NOTES
 The following signals have the specified effect when sent to the
 .I pppd

usr.sbin/pppd/pppd.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: pppd.h,v 1.4 1993/11/10 01:34:32 paulus Exp $
+ * $Id: pppd.h,v 1.5 1994/05/08 12:16:30 paulus Exp $
  */
 
 /*
@@ -39,6 +39,9 @@
 #define MAXNAMELEN	256	/* max length of hostname or name for auth */
 #define MAXSECRETLEN	256	/* max length of password or secret */
 
+/*
+ * Global variables.
+ */
 extern int debug;		/* Debug flag */
 extern int ifunit;		/* Interface unit number */
 extern char ifname[];		/* Interface name */
@@ -46,7 +49,20 @@ extern int fd;			/* Device file descriptor */
 extern int s;			/* socket descriptor */
 extern char hostname[];		/* hostname */
 extern u_char outpacket_buf[];	/* buffer for outgoing packets */
+extern int phase;		/* See values below */
 
+/*
+ * Values for phase.
+ */
+#define PHASE_DEAD		0
+#define PHASE_ESTABLISH		1
+#define PHASE_AUTHENTICATE	2
+#define PHASE_NETWORK		3
+#define PHASE_TERMINATE		4
+
+/*
+ * Prototypes.
+ */
 void quit __ARGS((void));	/* Cleanup and exit */
 void timeout __ARGS((void (*)(), caddr_t, int));
 				/* Look-alike of kernel's timeout() */

usr.sbin/pppd/pppd/Makefile

@@ -1,8 +1,8 @@
-#	$Id: Makefile,v 1.5 1993/11/10 01:33:51 paulus Exp $
+#	$Id: Makefile,v 1.6 1994/05/08 12:16:10 paulus Exp $
 
 PROG=	pppd
 SRCS=	main.c magic.c fsm.c lcp.c ipcp.c upap.c chap.c md5.c \
-	auth.c options.c sys-bsd.c
+	auth.c options.c lock.c sys-bsd.c
 MAN8=	pppd.0
 SUBDIR=	pppstats chat
 BINMODE=4555

usr.sbin/pppd/pppd/auth.c

@@ -33,7 +33,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: auth.c,v 1.4 1994/01/25 05:58:02 paulus Exp $";
+static char rcsid[] = "$Id: auth.c,v 1.5 1994/05/08 12:16:13 paulus Exp $";
 #endif
 
 #include <stdio.h>
@@ -106,6 +106,7 @@ void check_access __ARGS((FILE *, char *));
 
 static int  login __ARGS((char *, char *, char **, int *));
 static void logout __ARGS((void));
+static int  null_login __ARGS((int));
 static int  get_upap_passwd __ARGS((void));
 static int  have_upap_secret __ARGS((void));
 static int  have_chap_secret __ARGS((char *, char *));
@@ -135,11 +136,18 @@ link_terminated(unit)
 {
     if (logged_in)
 	logout();
-    if (lcp_wantoptions[unit].restart) {
+    phase = PHASE_DEAD;
-	lcp_lowerdown(unit);
+    syslog(LOG_NOTICE, "Connection terminated.");
-	lcp_lowerup(unit);
+}
-    } else
+
-	EXIT(unit);
+/*
+ * LCP has gone down; it will either die or try to re-establish.
+ */
+void
+link_down(unit)
+    int unit;
+{
+    phase = PHASE_TERMINATE;
 }
 
 /*
@@ -157,14 +165,19 @@ link_established(unit)
 
     if (auth_required && !(go->neg_chap || go->neg_upap)) {
 	/*
-	 * We wanted the peer to authenticate himself, and he refused:
+	 * We wanted the peer to authenticate itself, and it refused:
-	 * tell him to go away.
+	 * treat it as though it authenticated with PAP using a username
+	 * of "" and a password of "".  If that's not OK, boot it out.
 	 */
+	if (wo->neg_upap && !null_login(unit)) {
 	    syslog(LOG_WARNING, "peer refused to authenticate");
 	    lcp_close(unit);
+	    phase = PHASE_TERMINATE;
 	    return;
 	}
+    }
 
+    phase = PHASE_AUTHENTICATE;
     auth = 0;
     if (go->neg_chap) {
 	ChapAuthPeer(unit, our_name, go->chap_mdtype);
@@ -182,8 +195,10 @@ link_established(unit)
     }
     auth_pending[unit] = auth;
 
-    if (!auth)
+    if (!auth) {
+	phase = PHASE_NETWORK;
 	ipcp_open(unit);
+    }
 }
 
 /*
@@ -197,6 +212,7 @@ auth_peer_fail(unit, protocol)
      * Authentication failure: take the link down
      */
     lcp_close(unit);
+    phase = PHASE_TERMINATE;
 }
 
 /*
@@ -225,8 +241,10 @@ auth_peer_success(unit, protocol)
      * If there is no more authentication still to be done,
      * proceed to the network phase.
      */
-    if ((auth_pending[unit] &= ~bit) == 0)
+    if ((auth_pending[unit] &= ~bit) == 0) {
+	phase = PHASE_NETWORK;
 	ipcp_open(unit);
+    }
 }
 
 /*
@@ -268,8 +286,10 @@ auth_withpeer_success(unit, protocol)
      * If there is no more authentication still being done,
      * proceed to the network phase.
      */
-    if ((auth_pending[unit] &= ~bit) == 0)
+    if ((auth_pending[unit] &= ~bit) == 0) {
+	phase = PHASE_NETWORK;
 	ipcp_open(unit);
+    }
 }
 
 
@@ -485,6 +505,46 @@ logout()
 }
 
 
+/*
+ * null_login - Check if a username of "" and a password of "" are
+ * acceptable, and iff so, set the list of acceptable IP addresses
+ * and return 1.
+ */
+static int
+null_login(unit)
+    int unit;
+{
+    char *filename;
+    FILE *f;
+    int i, ret;
+    struct wordlist *addrs;
+    char secret[MAXWORDLEN];
+
+    /*
+     * Open the file of upap secrets and scan for a suitable secret.
+     * We don't accept a wildcard client.
+     */
+    filename = _PATH_UPAPFILE;
+    addrs = NULL;
+    f = fopen(filename, "r");
+    if (f == NULL)
+	return 0;
+    check_access(f, filename);
+
+    i = scan_authfile(f, "", our_name, secret, &addrs, filename);
+    ret = i >= 0 && (i & NONWILD_CLIENT) != 0 && secret[0] == 0;
+
+    if (ret) {
+	if (addresses[unit] != NULL)
+	    free_wordlist(addresses[unit]);
+	addresses[unit] = addrs;
+    }
+
+    fclose(f);
+    return ret;
+}
+
+
 /*
  * get_upap_passwd - get a password for authenticating ourselves with
  * our peer using PAP.  Returns 1 on success, 0 if no suitable password

usr.sbin/pppd/pppd/chap.c

@@ -19,7 +19,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: chap.c,v 1.3 1993/11/10 01:33:59 paulus Exp $";
+static char rcsid[] = "$Id: chap.c,v 1.4 1994/05/08 12:16:15 paulus Exp $";
 #endif
 
 /*
@@ -557,6 +557,8 @@ ChapReceiveSuccess(cstate, inp, id, len)
 	return;
     }
 
+    UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+
     /*
      * Print message.
      */
@@ -591,6 +593,8 @@ ChapReceiveFailure(cstate, inp, id, len)
 	return;
     }
 
+    UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+
     /*
      * Print message.
      */
@@ -738,6 +742,71 @@ ChapSendResponse(cstate)
     ++cstate->resp_transmits;
 }
 
+/*
+ * ChapPrintPkt - print the contents of a CHAP packet.
+ */
+char *ChapCodenames[] = {
+    "Challenge", "Response", "Success", "Failure"
+};
+
+int
+ChapPrintPkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int code, id, len;
+    int clen, nlen;
+    u_char x;
+
+    if (plen < CHAP_HEADERLEN)
+	return 0;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < CHAP_HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *))
+	printer(arg, " %s", ChapCodenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= CHAP_HEADERLEN;
+    switch (code) {
+    case CHAP_CHALLENGE:
+    case CHAP_RESPONSE:
+	if (len < 1)
+	    break;
+	clen = p[0];
+	if (len < clen + 1)
+	    break;
+	++p;
+	nlen = len - clen - 1;
+	printer(arg, " <");
+	for (; clen > 0; --clen) {
+	    GETCHAR(x, p);
+	    printer(arg, "%.2x", x);
+	}
+	printer(arg, ">, name = ");
+	print_string((char *)p, nlen, printer, arg);
+	break;
+    case CHAP_FAILURE:
+    case CHAP_SUCCESS:
+	printer(arg, " ");
+	print_string((char *)p, len, printer, arg);
+	break;
+    default:
+	for (clen = len; clen > 0; --clen) {
+	    GETCHAR(x, p);
+	    printer(arg, " %.2x", x);
+	}
+    }
+
+    return len + CHAP_HEADERLEN;
+}
+
 #ifdef NO_DRAND48
 
 double drand48()

usr.sbin/pppd/pppd/chap.h

@@ -1,6 +1,5 @@
 /*
  * chap.h - Cryptographic Handshake Authentication Protocol definitions.
- *          based on November 1991 draft of PPP Authentication RFC
  *
  * Copyright (c) 1991 Gregory M. Christy
  * All rights reserved.
@@ -16,13 +15,13 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: chap.h,v 1.3 1993/11/10 01:34:02 paulus Exp $
+ * $Id: chap.h,v 1.4 1994/05/08 12:16:16 paulus Exp $
  */
 
 #ifndef __CHAP_INCLUDE__
 
 /* Code + ID + length */
-#define CHAP_HEADERLEN	(sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
+#define CHAP_HEADERLEN		4
 
 /*
  * CHAP codes.
@@ -106,6 +105,8 @@ void ChapLowerUp __ARGS((int));
 void ChapLowerDown __ARGS((int));
 void ChapInput __ARGS((int, u_char *, int));
 void ChapProtocolReject __ARGS((int));
+int  ChapPrintPkt __ARGS((u_char *, int,
+			  void (*) __ARGS((void *, char *, ...)), void *));
 
 #define __CHAP_INCLUDE__
 #endif /* __CHAP_INCLUDE__ */

usr.sbin/pppd/pppd/fsm.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: fsm.c,v 1.3 1993/11/10 01:34:04 paulus Exp $";
+static char rcsid[] = "$Id: fsm.c,v 1.4 1994/05/08 12:16:17 paulus Exp $";
 #endif
 
 /*
@@ -29,7 +29,6 @@ static char rcsid[] = "$Id: fsm.c,v 1.3 1993/11/10 01:34:04 paulus Exp $";
 
 #include <stdio.h>
 #include <sys/types.h>
-/*#include <malloc.h>*/
 #include <syslog.h>
 
 #include "ppp.h"
@@ -453,6 +452,7 @@ fsm_rconfack(f, id, inp, len)
 		  PROTO_NAME(f), len));
 	return;
     }
+    f->reqid = -1;
 
     switch (f->state) {
     case CLOSED:
@@ -514,6 +514,7 @@ fsm_rconfnakrej(f, code, id, inp, len)
 		  PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
 	return;
     }
+    f->reqid = -1;
 
     switch (f->state) {
     case CLOSED:
@@ -556,7 +557,6 @@ fsm_rtermreq(f, id)
     FSMDEBUG((LOG_INFO, "fsm_rtermreq(%s): Rcvd id %d.",
 	      PROTO_NAME(f), id));
 
-    fsm_sdata(f, TERMACK, id, NULL, 0);
     switch (f->state) {
     case ACKRCVD:
     case ACKSENT:
@@ -572,6 +572,8 @@ fsm_rtermreq(f, id)
 	TIMEOUT(fsm_timeout, (caddr_t) f, f->timeouttime);
 	break;
     }
+
+    fsm_sdata(f, TERMACK, id, NULL, 0);
 }
 
 

usr.sbin/pppd/pppd/fsm.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: fsm.h,v 1.3 1993/11/10 01:34:07 paulus Exp $
+ * $Id: fsm.h,v 1.4 1994/05/08 12:16:18 paulus Exp $
  */
 
 /*
@@ -35,11 +35,6 @@
 #define TERMREQ		5	/* Termination Request */
 #define TERMACK		6	/* Termination Ack */
 #define CODEREJ		7	/* Code Reject */
-#define PROTREJ		8	/* Protocol Reject */
-#define ECHOREQ		9	/* Echo Request */
-#define ECHOREP		10	/* Echo Reply */
-#define DISCREQ		11	/* Discard Request */
-#define KEEPALIVE	12	/* Keepalive */
 
 
 /*

usr.sbin/pppd/pppd/ipcp.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: ipcp.c,v 1.4 1994/02/22 00:11:57 paulus Exp $";
+static char rcsid[] = "$Id: ipcp.c,v 1.5 1994/05/08 12:16:19 paulus Exp $";
 #endif
 
 /*
@@ -43,7 +43,7 @@ static char rcsid[] = "$Id: ipcp.c,v 1.4 1994/02/22 00:11:57 paulus Exp $";
 #include "ppp.h"
 #include "fsm.h"
 #include "ipcp.h"
-
+#include "pathnames.h"
 
 /* global vars */
 ipcp_options ipcp_wantoptions[NPPP];	/* Options that we want to request */
@@ -51,6 +51,10 @@ ipcp_options ipcp_gotoptions[NPPP];	/* Options that peer ack'd */
 ipcp_options ipcp_allowoptions[NPPP];	/* Options we allow peer to request */
 ipcp_options ipcp_hisoptions[NPPP];	/* Options that we ack'd */
 
+extern char ifname[];
+extern char devname[];
+extern int baud_rate;
+
 /* local vars */
 static int cis_received[NPPP];		/* # Conf-Reqs received */
 
@@ -66,7 +70,7 @@ static int  ipcp_rejci __ARGS((fsm *, u_char *, int));	/* Peer rej'd our CI */
 static int  ipcp_reqci __ARGS((fsm *, u_char *, int *, int)); /* Rcv CI */
 static void ipcp_up __ARGS((fsm *));		/* We're UP */
 static void ipcp_down __ARGS((fsm *));		/* We're DOWN */
-
+static void ipcp_script __ARGS((fsm *, char *)); /* Run an up/down script */
 
 fsm ipcp_fsm[NPPP];		/* IPCP fsm structure */
 
@@ -885,6 +889,10 @@ ipcp_reqci(f, inp, len, reject_if_disagree)
 		}
 		ho->maxslotindex = maxslotindex;
 		ho->cflag = wo->cflag;
+	    } else {
+		ho->old_vj = 1;
+		ho->maxslotindex = MAX_STATES - 1;
+		ho->cflag = 1;
 	    }
 	    break;
 
@@ -988,7 +996,7 @@ ipcp_up(f)
     }
 
     /*
-     * Check that the peer is allowed to use the IP address he wants.
+     * Check that the peer is allowed to use the IP address it wants.
      */
     if (!auth_ip_addr(f->unit, ho->hisaddr)) {
 	syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
@@ -1011,7 +1019,7 @@ ipcp_up(f)
     }
 
     /* set tcp compression */
-    sifvjcomp(f->unit, ho->neg_vj, ho->cflag);
+    sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
 
     /* bring the interface up for IP */
     if (!sifup(f->unit)) {
@@ -1029,6 +1037,13 @@ ipcp_up(f)
     if (ipcp_wantoptions[f->unit].proxy_arp)
 	if (sifproxyarp(f->unit, ho->hisaddr))
 	    go->proxy_arp = 1;
+
+    /*
+     * Execute the ip-up script, like this:
+     *	/etc/ppp/ip-up interface tty speed local-IP remote-IP
+     */
+    ipcp_script(f, _PATH_IPUP);
+
 }
 
 
@@ -1054,4 +1069,138 @@ ipcp_down(f)
 	cifdefaultroute(f->unit, hisaddr);
     sifdown(f->unit);
     cifaddr(f->unit, ouraddr, hisaddr);
+
+    /* Execute the ip-down script */
+    ipcp_script(f, _PATH_IPDOWN);
+}
+
+
+/*
+ * ipcp_script - Execute a script with arguments
+ * interface-name tty-name speed local-IP remote-IP.
+ */
+static void
+ipcp_script(f, script)
+    fsm *f;
+    char *script;
+{
+    char strspeed[32], strlocal[32], strremote[32];
+    char *argv[8];
+
+    sprintf(strspeed, "%d", baud_rate);
+    strcpy(strlocal, ip_ntoa(ipcp_gotoptions[f->unit].ouraddr));
+    strcpy(strremote, ip_ntoa(ipcp_hisoptions[f->unit].hisaddr));
+
+    argv[0] = script;
+    argv[1] = ifname;
+    argv[2] = devname;
+    argv[3] = strspeed;
+    argv[4] = strlocal;
+    argv[5] = strremote;
+    argv[6] = NULL;
+    run_program(script, argv, 0);
+}
+
+/*
+ * ipcp_printpkt - print the contents of an IPCP packet.
+ */
+char *ipcp_codenames[] = {
+    "ConfReq", "ConfAck", "ConfNak", "ConfRej",
+    "TermReq", "TermAck", "CodeRej"
+};
+
+int
+ipcp_printpkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer)();
+    void *arg;
+{
+    int code, id, len, olen;
+    u_char *pstart, *optend;
+    u_short cishort;
+    u_long cilong;
+
+    if (plen < HEADERLEN)
+	return 0;
+    pstart = p;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(ipcp_codenames) / sizeof(char *))
+	printer(arg, " %s", ipcp_codenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= HEADERLEN;
+    switch (code) {
+    case CONFREQ:
+    case CONFACK:
+    case CONFNAK:
+    case CONFREJ:
+	/* print option list */
+	while (len >= 2) {
+	    GETCHAR(code, p);
+	    GETCHAR(olen, p);
+	    p -= 2;
+	    if (olen < 2 || olen > len) {
+		break;
+	    }
+	    printer(arg, " <");
+	    len -= olen;
+	    optend = p + olen;
+	    switch (code) {
+	    case CI_ADDRS:
+		if (olen == CILEN_ADDRS) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "addrs %s", ip_ntoa(htonl(cilong)));
+		    GETLONG(cilong, p);
+		    printer(arg, " %s", ip_ntoa(htonl(cilong)));
+		}
+		break;
+	    case CI_COMPRESSTYPE:
+		if (olen >= CILEN_COMPRESS) {
+		    p += 2;
+		    GETSHORT(cishort, p);
+		    printer(arg, "compress ");
+		    switch (cishort) {
+		    case IPCP_VJ_COMP:
+			printer(arg, "VJ");
+			break;
+		    case IPCP_VJ_COMP_OLD:
+			printer(arg, "old-VJ");
+			break;
+		    default:
+			printer(arg, "0x%x", cishort);
+		    }
+		}
+		break;
+	    case CI_ADDR:
+		if (olen == CILEN_ADDR) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "addr %s", ip_ntoa(htonl(cilong)));
+		}
+		break;
+	    }
+	    while (p < optend) {
+		GETCHAR(code, p);
+		printer(arg, " %.2x", code);
+	    }
+	    printer(arg, ">");
+	}
+	break;
+    }
+
+    /* print the rest of the bytes in the packet */
+    for (; len > 0; --len) {
+	GETCHAR(code, p);
+	printer(arg, " %.2x", code);
+    }
+
+    return p - pstart;
 }

usr.sbin/pppd/pppd/ipcp.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: ipcp.h,v 1.4 1994/02/22 00:11:59 paulus Exp $
+ * $Id: ipcp.h,v 1.5 1994/05/08 12:16:20 paulus Exp $
  */
 
 /*
@@ -65,3 +65,4 @@ void ipcp_lowerup __ARGS((int));
 void ipcp_lowerdown __ARGS((int));
 void ipcp_input __ARGS((int, u_char *, int));
 void ipcp_protrej __ARGS((int));
+int  ipcp_printpkt __ARGS((u_char *, int, void (*)(), void *));

usr.sbin/pppd/pppd/lcp.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: lcp.c,v 1.3 1993/11/10 01:34:15 paulus Exp $";
+static char rcsid[] = "$Id: lcp.c,v 1.4 1994/05/08 12:16:22 paulus Exp $";
 #endif
 
 /*
@@ -55,6 +55,7 @@ lcp_options lcp_wantoptions[NPPP];	/* Options that we want to request */
 lcp_options lcp_gotoptions[NPPP];	/* Options that peer ack'd */
 lcp_options lcp_allowoptions[NPPP];	/* Options we allow peer to request */
 lcp_options lcp_hisoptions[NPPP];	/* Options that we ack'd */
+u_long xmit_accm[NPPP][8];		/* extended transmit ACCM */
 
 /*
  * Callbacks for fsm code.  (CI = Configuration Information)
@@ -129,7 +130,7 @@ lcp_init(unit)
 					   implementations */
     wo->neg_mru = 1;
     wo->mru = DEFMRU;
-    wo->neg_asyncmap = 1;
+    wo->neg_asyncmap = 0;
     wo->asyncmap = 0;
     wo->neg_chap = 0;			/* Set to 1 on server */
     wo->neg_upap = 0;			/* Set to 1 on server */
@@ -151,6 +152,8 @@ lcp_init(unit)
     ao->neg_accompression = 1;
     ao->neg_lqr = 0;			/* no LQR implementation yet */
 
+    memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
+    xmit_accm[unit][3] = 0x60000000;
 }
 
 
@@ -192,9 +195,11 @@ lcp_lowerup(unit)
     int unit;
 {
     sifdown(unit);
+    ppp_set_xaccm(unit, xmit_accm[unit]);
     ppp_send_config(unit, MTU, 0xffffffff, 0, 0);
     ppp_recv_config(unit, MTU, 0, 0, 0);
     peer_mru[unit] = MTU;
+    lcp_allowoptions[unit].asyncmap = xmit_accm[unit][0];
 
     fsm_lowerup(&lcp_fsm[unit]);
 }
@@ -1219,7 +1224,7 @@ lcp_up(f)
      * set our MRU to the larger of value we wanted and
      * the value we got in the negotiation.
      */
-    ppp_send_config(f->unit, (ho->neg_mru? MIN(ao->mru, ho->mru): MTU),
+    ppp_send_config(f->unit, MIN(ao->mru, (ho->neg_mru? ho->mru: MTU)),
 		    (ho->neg_asyncmap? ho->asyncmap: 0xffffffff),
 		    ho->neg_pcompression, ho->neg_accompression);
     ppp_recv_config(f->unit, (go->neg_mru? MAX(wo->mru, go->mru): MTU),
@@ -1254,7 +1259,8 @@ lcp_down(f)
     ppp_send_config(f->unit, MTU, 0xffffffff, 0, 0);
     ppp_recv_config(f->unit, MTU, 0, 0, 0);
     peer_mru[f->unit] = MTU;
-    syslog(LOG_NOTICE, "Connection terminated.");
+
+    link_down(f->unit);
 }
 
 
@@ -1279,3 +1285,139 @@ lcp_finished(f)
     link_terminated(f->unit);
 }
 
+
+/*
+ * lcp_printpkt - print the contents of an LCP packet.
+ */
+char *lcp_codenames[] = {
+    "ConfReq", "ConfAck", "ConfNak", "ConfRej",
+    "TermReq", "TermAck", "CodeRej", "ProtRej",
+    "EchoReq", "EchoRep", "DiscReq"
+};
+
+int
+lcp_printpkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int code, id, len, olen;
+    u_char *pstart, *optend;
+    u_short cishort;
+    u_long cilong;
+
+    if (plen < HEADERLEN)
+	return 0;
+    pstart = p;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *))
+	printer(arg, " %s", lcp_codenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= HEADERLEN;
+    switch (code) {
+    case CONFREQ:
+    case CONFACK:
+    case CONFNAK:
+    case CONFREJ:
+	/* print option list */
+	while (len >= 2) {
+	    GETCHAR(code, p);
+	    GETCHAR(olen, p);
+	    p -= 2;
+	    if (olen < 2 || olen > len) {
+		break;
+	    }
+	    printer(arg, " <");
+	    len -= olen;
+	    optend = p + olen;
+	    switch (code) {
+	    case CI_MRU:
+		if (olen == CILEN_SHORT) {
+		    p += 2;
+		    GETSHORT(cishort, p);
+		    printer(arg, "mru %d", cishort);
+		}
+		break;
+	    case CI_ASYNCMAP:
+		if (olen == CILEN_LONG) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "asyncmap 0x%x", cilong);
+		}
+		break;
+	    case CI_AUTHTYPE:
+		if (olen >= CILEN_SHORT) {
+		    p += 2;
+		    printer(arg, "auth ");
+		    GETSHORT(cishort, p);
+		    switch (cishort) {
+		    case UPAP:
+			printer(arg, "upap");
+			break;
+		    case CHAP:
+			printer(arg, "chap");
+			break;
+		    default:
+			printer(arg, "0x%x", cishort);
+		    }
+		}
+		break;
+	    case CI_QUALITY:
+		if (olen >= CILEN_SHORT) {
+		    p += 2;
+		    printer(arg, "quality ");
+		    GETSHORT(cishort, p);
+		    switch (cishort) {
+		    case LQR:
+			printer(arg, "lqr");
+			break;
+		    default:
+			printer(arg, "0x%x", cishort);
+		    }
+		}
+		break;
+	    case CI_MAGICNUMBER:
+		if (olen == CILEN_LONG) {
+		    p += 2;
+		    GETLONG(cilong, p);
+		    printer(arg, "magic 0x%x", cilong);
+		}
+		break;
+	    case CI_PCOMPRESSION:
+		if (olen == CILEN_VOID) {
+		    p += 2;
+		    printer(arg, "pcomp");
+		}
+		break;
+	    case CI_ACCOMPRESSION:
+		if (olen == CILEN_VOID) {
+		    p += 2;
+		    printer(arg, "accomp");
+		}
+		break;
+	    }
+	    while (p < optend) {
+		GETCHAR(code, p);
+		printer(arg, " %.2x", code);
+	    }
+	    printer(arg, ">");
+	}
+	break;
+    }
+
+    /* print the rest of the bytes in the packet */
+    for (; len > 0; --len) {
+	GETCHAR(code, p);
+	printer(arg, " %.2x", code);
+    }
+
+    return p - pstart;
+}

usr.sbin/pppd/pppd/lcp.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: lcp.h,v 1.3 1993/11/10 01:34:17 paulus Exp $
+ * $Id: lcp.h,v 1.4 1994/05/08 12:16:23 paulus Exp $
  */
 
 /*
@@ -27,10 +27,16 @@
 #define CI_AUTHTYPE	3	/* Authentication Type */
 #define CI_QUALITY	4	/* Quality Protocol */
 #define CI_MAGICNUMBER	5	/* Magic Number */
-#define CI_KEEPALIVE	6	/* Keep Alive Parameters - OBSOLETE */
 #define CI_PCOMPRESSION	7	/* Protocol Field Compression */
 #define CI_ACCOMPRESSION 8	/* Address/Control Field Compression */
 
+/*
+ * LCP-specific packet types.
+ */
+#define PROTREJ		8	/* Protocol Reject */
+#define ECHOREQ		9	/* Echo Request */
+#define ECHOREP		10	/* Echo Reply */
+#define DISCREQ		11	/* Discard Request */
 
 /*
  * The state of options is described by an lcp_options structure.
@@ -60,6 +66,7 @@ extern lcp_options lcp_wantoptions[];
 extern lcp_options lcp_gotoptions[];
 extern lcp_options lcp_allowoptions[];
 extern lcp_options lcp_hisoptions[];
+extern u_long xmit_accm[][8];
 
 #define DEFMRU	1500		/* Try for this */
 #define MINMRU	128		/* No MRUs below this */
@@ -73,6 +80,8 @@ void lcp_lowerdown __ARGS((int));
 void lcp_input __ARGS((int, u_char *, int));
 void lcp_protrej __ARGS((int));
 void lcp_sprotrej __ARGS((int, u_char *, int));
+int  lcp_printpkt __ARGS((u_char *, int,
+			  void (*) __ARGS((void *, char *, ...)), void *));
 
 extern int lcp_warnloops;	/* Warn about a loopback this often */
 #define DEFWARNLOOPS	10	/* Default value for above */

usr.sbin/pppd/pppd/main.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.8 1994/01/25 05:58:05 paulus Exp $";
+static char rcsid[] = "$Id: main.c,v 1.9 1994/05/08 12:16:24 paulus Exp $";
 #endif
 
 #define SETSID
@@ -30,6 +30,7 @@ static char rcsid[] = "$Id: main.c,v 1.8 1994/01/25 05:58:05 paulus Exp $";
 #include <syslog.h>
 #include <netdb.h>
 #include <utmp.h>
+#include <sys/wait.h>
 
 /*
  * If REQ_SYSOPTIONS is defined to 1, pppd will not run unless
@@ -39,10 +40,6 @@ static char rcsid[] = "$Id: main.c,v 1.8 1994/01/25 05:58:05 paulus Exp $";
 #define REQ_SYSOPTIONS	0
 #endif
 
-#ifdef STREAMS
-#undef SGTTY
-#endif
-
 #ifdef SGTTY
 #include <sgtty.h>
 #else
@@ -115,6 +112,8 @@ int default_device = TRUE;	/* use default device (stdin/out) */
 int fd;				/* Device file descriptor */
 int s;				/* Socket file descriptor */
 
+int phase;			/* where the link is at */
+
 #ifdef SGTTY
 static struct sgttyb initsgttyb;	/* Initial TTY sgttyb */
 #else
@@ -129,14 +128,18 @@ u_char outpacket_buf[MTU+DLLHEADERLEN]; /* buffer for outgoing packet */
 static u_char inpacket_buf[MTU+DLLHEADERLEN]; /* buffer for incoming packet */
 
 int hungup;			/* terminal has been hung up */
+static int n_children;		/* # child processes still running */
 
 /* configured variables */
 
 int debug = 0;		        /* Debug flag */
+int kdebugflag = 0;		/* Kernel debugging flag */
 char user[MAXNAMELEN];		/* username for PAP */
 char passwd[MAXSECRETLEN];	/* password for PAP */
 char *connector = NULL;		/* "connect" command */
-int inspeed = 0;		/* Input/Output speed */
+char *disconnector = NULL;	/* "disconnect" command */
+int inspeed = 0;		/* Input/Output speed requested */
+int baud_rate;			/* bits/sec currently used */
 u_long netmask = 0;		/* netmask to use on ppp interface */
 int crtscts = 0;		/* use h/w flow control */
 int nodetach = 0;		/* don't fork */
@@ -147,6 +150,7 @@ int proxyarp = 0;		/* set entry in arp table */
 int persist = 0;		/* re-initiate on termination */
 int answer = 0;			/* wait for incoming call */
 int uselogin = 0;		/* check PAP info against /etc/passwd */
+int lockflag = 0;		/* lock the serial device */
 
 
 /* prototypes */
@@ -159,13 +163,16 @@ static void incdebug __ARGS((int));
 static void nodebug __ARGS((int));
 void establish_ppp __ARGS((void));
 
+void reap_kids __ARGS((void));
 void cleanup __ARGS((int, caddr_t));
 void die __ARGS((int));
-void dumpbuffer __ARGS((unsigned char *, int, int));
+void novm __ARGS((char *));
+
+void log_packet __ARGS((u_char *, int, char *));
+void format_packet __ARGS((u_char *, int,
+			   void (*) (void *, char *, ...), void *));
+void pr_log __ARGS((void *, char *, ...));
 
-#ifdef	STREAMS
-extern	char	*ttyname __ARGS((int));
-#endif
 extern	char	*getlogin __ARGS((void));
 
 /*
@@ -177,13 +184,16 @@ static struct protent {
     void (*init)();
     void (*input)();
     void (*protrej)();
+    int  (*printpkt)();
+    char *name;
 } prottbl[] = {
-    { LCP, lcp_init, lcp_input, lcp_protrej },
+    { LCP, lcp_init, lcp_input, lcp_protrej, lcp_printpkt, "LCP" },
-    { IPCP, ipcp_init, ipcp_input, ipcp_protrej },
+    { IPCP, ipcp_init, ipcp_input, ipcp_protrej, ipcp_printpkt, "IPCP" },
-    { UPAP, upap_init, upap_input, upap_protrej },
+    { UPAP, upap_init, upap_input, upap_protrej, upap_printpkt, "PAP" },
-    { CHAP, ChapInit, ChapInput, ChapProtocolReject },
+    { CHAP, ChapInit, ChapInput, ChapProtocolReject, ChapPrintPkt, "CHAP" },
 };
 
+#define N_PROTO		(sizeof(prottbl) / sizeof(prottbl[0]))
 
 main(argc, argv)
     int argc;
@@ -195,28 +205,8 @@ main(argc, argv)
     FILE *pidfile;
     char *p;
 
-    /*
-     * Initialize syslog system and magic number package.
-     */
-#if BSD >= 43 || defined(sun)
-    openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
-    setlogmask(LOG_UPTO(LOG_INFO));
-#else
-    openlog("pppd", LOG_PID);
-#define LOG_UPTO(x) (x)
-#define setlogmask(x) (x)
-#endif
-
-#ifdef STREAMS
-    p = ttyname(fileno(stdin));
-    if (p)
-	strcpy(devname, p);
-#endif
-  
-    magic_init();
-
     if (gethostname(hostname, MAXNAMELEN) < 0 ) {
-	syslog(LOG_ERR, "couldn't get hostname: %m");
+	perror("couldn't get hostname");
 	die(1);
     }
     hostname[MAXNAMELEN-1] = 0;
@@ -233,7 +223,7 @@ main(argc, argv)
      * the system options file, the user's options file, and the command
      * line arguments.
      */
-    for (i = 0; i < sizeof (prottbl) / sizeof (struct protent); i++)
+    for (i = 0; i < N_PROTO; i++)
 	(*prottbl[i].init)(0);
   
     progname = *argv;
@@ -245,6 +235,20 @@ main(argc, argv)
     check_auth_options();
     setipdefault();
 
+    if (lockflag && !default_device)
+	if (lock(devname) < 0)
+	    die(1);
+
+    /*
+     * Initialize syslog system and magic number package.
+     */
+    openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
+    setlogmask(LOG_UPTO(LOG_INFO));
+    if (debug)
+	setlogmask(LOG_UPTO(LOG_DEBUG));
+
+    magic_init();
+
     p = getlogin();
     if (p == NULL)
 	p = "(unknown)";
@@ -314,9 +318,6 @@ main(argc, argv)
     sigaddset(&mask, SIGINT);
     sigaddset(&mask, SIGALRM);
     sigaddset(&mask, SIGIO);
-#ifdef	STREAMS
-    sigaddset(&mask, SIGPOLL);
-#endif
 
 #define SIGNAL(s, handler)	{ \
 	sv.sv_handler = handler; \
@@ -333,9 +334,6 @@ main(argc, argv)
     SIGNAL(SIGTERM, term);		/* Terminate */
     SIGNAL(SIGALRM, alrm);		/* Timeout */
     SIGNAL(SIGIO, io);			/* Input available */
-#ifdef	STREAMS
-    SIGNAL(SIGPOLL, io);		/* Input available */
-#endif
 
     signal(SIGUSR1, incdebug);		/* Increment debug flag */
     signal(SIGUSR2, nodebug);		/* Reset debug flag */
@@ -345,9 +343,6 @@ main(argc, argv)
      */
     sigemptyset(&mask);
     sigaddset(&mask, SIGIO);
-#ifdef	STREAMS
-    sigaddset(&mask, SIGPOLL);
-#endif
     sigprocmask(SIG_BLOCK, &mask, NULL);
 
     /*
@@ -359,18 +354,20 @@ main(argc, argv)
     }
     hungup = 0;
 
+#ifdef TIOCSCTTY
     /* set device to be controlling tty */
     if (!default_device && ioctl(fd, TIOCSCTTY) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCSCTTY): %m");
 	die(1);
     }
-
+#endif /* TIOCSCTTY */
-    /* set line speed, flow control, etc. */
-    set_up_tty(fd);
 
     /* run connection script */
     if (connector) {
-	syslog(LOG_INFO, "Connecting with <%s>", connector);
+	MAINDEBUG((LOG_INFO, "Connecting with <%s>", connector));
+
+	/* set line speed, flow control, etc.; set CLOCAL for now */
+	set_up_tty(fd, 1);
 
 	/* drop dtr to hang up in case modem is off hook */
 	if (!default_device && modem) {
@@ -379,7 +376,7 @@ main(argc, argv)
 	    setdtr(fd, TRUE);
 	}
 
-	if (set_up_connection(connector, fd, fd) < 0) {
+	if (device_script(connector, fd, fd) < 0) {
 	    syslog(LOG_ERR, "could not set up connection");
 	    setdtr(fd, FALSE);
 	    die(1);
@@ -389,6 +386,9 @@ main(argc, argv)
 	sleep(1);		/* give it time to set up its terminal */
     }
   
+    /* set line speed, flow control, etc.; clear CLOCAL if modem option */
+    set_up_tty(fd, 0);
+
     /* set up the serial device as a ppp interface */
     establish_ppp();
 
@@ -450,9 +450,24 @@ main(argc, argv)
     sigprocmask(SIG_BLOCK, &mask, NULL); /* Block signals now */
     lcp_lowerup(0);		/* XXX Well, sort of... */
     lcp_open(0);		/* Start protocol */
-    for (;;) {
+    for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) {
 	sigpause(0);		/* Wait for next signal */
+	reap_kids();		/* Don't leave dead kids lying around */
     }
+
+    /*
+     * Run disconnector script, if requested
+     */
+    if (disconnector) {
+	if (device_script(disconnector, fd, fd) < 0) {
+	    syslog(LOG_WARNING, "disconnect script failed");
+	    die(1);
+	}
+
+	syslog(LOG_INFO, "Disconnected...");
+    }
+
+    quit();
 }
 
 #if B9600 == 9600
@@ -461,6 +476,7 @@ main(argc, argv)
  * (so we can ask for any speed).
  */
 #define translate_speed(bps)	(bps)
+#define baud_rate_of(speed)	(speed)
 
 #else
 /*
@@ -555,14 +571,32 @@ translate_speed(bps)
     syslog(LOG_WARNING, "speed %d not supported", bps);
     return 0;
 }
+
+/*
+ * Translate from a speed_t to bits/second.
+ */
+int
+baud_rate_of(speed)
+    int speed;
+{
+    struct speed *speedp;
+
+    if (speed == 0)
+	return 0;
+    for (speedp = speeds; speedp->speed_int; speedp++)
+	if (speed == speedp->speed_val)
+	    return speedp->speed_int;
+    return 0;
+}
 #endif
 
 /*
  * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
- * at the requested speed, etc.
+ * at the requested speed, etc.  If `local' is true, set CLOCAL
+ * regardless of whether the modem option was specified.
  */
-set_up_tty(fd)
+set_up_tty(fd, local)
-    int fd;
+    int fd, local;
 {
 #ifndef SGTTY
     int speed;
@@ -576,11 +610,16 @@ set_up_tty(fd)
     if (!restore_term)
 	inittermios = tios;
 
+#ifdef CRTSCTS
     tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL | CRTSCTS);
-    tios.c_cflag |= CS8 | CREAD | HUPCL;
     if (crtscts)
 	tios.c_cflag |= CRTSCTS;
-    if (!modem)
+#else
+    tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
+#endif	/* CRTSCTS */
+
+    tios.c_cflag |= CS8 | CREAD | HUPCL;
+    if (local || !modem)
 	tios.c_cflag |= CLOCAL;
     tios.c_iflag = IGNBRK | IGNPAR;
     tios.c_oflag = 0;
@@ -591,12 +630,15 @@ set_up_tty(fd)
     if (speed) {
 	cfsetospeed(&tios, speed);
 	cfsetispeed(&tios, speed);
+    } else {
+	speed = cfgetospeed(&tios);
     }
 
     if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
 	syslog(LOG_ERR, "tcsetattr: %m");
 	die(1);
     }
+
 #else	/* SGTTY */
     int speed;
     struct sgttyb sgttyb;
@@ -616,15 +658,31 @@ set_up_tty(fd)
     speed = translate_speed(inspeed);
     if (speed)
 	sgttyb.sg_ispeed = speed;
+    else
+	speed = sgttyb.sg_ispeed;
 
     if (ioctl(fd, TIOCSETP, &sgttyb) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCSETP): %m");
 	die(1);
     }
 #endif
+
+    baud_rate = baud_rate_of(speed);
     restore_term = TRUE;
 }
 
+/*
+ * setdtr - control the DTR line on the serial port.
+ * This is called from die(), so it shouldn't call die().
+ */
+setdtr(fd, on)
+int fd, on;
+{
+    int modembits = TIOCM_DTR;
+
+    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+}
+
 
 /*
  * quit - Clean up state and exit.
@@ -656,23 +714,23 @@ cleanup(status, arg)
     int status;
     caddr_t arg;
 {
-    if (fd != 0) {
+    if (fd >= 0) {
 	/* drop dtr to hang up */
 	if (modem)
 	    setdtr(fd, FALSE);
 
 	if (fcntl(fd, F_SETFL, initfdflags) < 0)
-	    syslog(LOG_ERR, "fcntl(F_SETFL, fdflags): %m");
+	    syslog(LOG_WARNING, "fcntl(F_SETFL, fdflags): %m");
 
 	disestablish_ppp();
 
 	if (restore_term) {
 #ifndef SGTTY
 	    if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
-		syslog(LOG_ERR, "tcsetattr: %m");
+		syslog(LOG_WARNING, "tcsetattr: %m");
 #else
 	    if (ioctl(fd, TIOCSETP, &initsgttyb) < 0)
-		syslog(LOG_ERR, "ioctl(TIOCSETP): %m");
+		syslog(LOG_WARNING, "ioctl(TIOCSETP): %m");
 #endif
 	}
 
@@ -683,6 +741,9 @@ cleanup(status, arg)
     if (pidfilename[0] != 0 && unlink(pidfilename) < 0) 
 	syslog(LOG_WARNING, "unable to unlink pid file: %m");
     pidfilename[0] = 0;
+
+    if (lockflag && !default_device)
+	unlock();
 }
 
 
@@ -739,7 +800,7 @@ timeout(func, arg, time)
 	itv.it_interval.tv_sec = itv.it_interval.tv_usec =
 	    itv.it_value.tv_usec = 0;
 	itv.it_value.tv_sec = callout->c_time;
-	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds.",
+	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds in timeout.",
 		   itv.it_value.tv_sec));
 	if (setitimer(ITIMER_REAL, &itv, NULL)) {
 	    syslog(LOG_ERR, "setitimer(ITIMER_REAL): %m");
@@ -795,7 +856,7 @@ untimeout(func, arg)
 	itv.it_interval.tv_sec = itv.it_interval.tv_usec =
 	    itv.it_value.tv_usec = 0;
 	itv.it_value.tv_sec = callout ? callout->c_time : 0;
-	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds.",
+	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds in untimeout.",
 		   itv.it_value.tv_sec));
 	if (setitimer(ITIMER_REAL, &itv, NULL)) {
 	    syslog(LOG_ERR, "setitimer(ITIMER_REAL): %m");
@@ -912,22 +973,22 @@ alrm(sig, code, scp, addr)
     char *addr;
 {
     struct itimerval itv;
-    struct callout *freep;
+    struct callout *freep, *list, *last;
 
     MAINDEBUG((LOG_DEBUG, "Alarm"));
 
+    if (callout == NULL)
+	return;
     /*
-     * Call and free first scheduled timeout and any that were scheduled
+     * Get the first scheduled timeout and any that were scheduled
-     * for the same time.
+     * for the same time as a list, and remove them all from callout
+     * list.
      */
-    while (callout) {
+    list = last = callout;
-	freep = callout;	/* Remove entry before calling */
+    while (last->c_next != NULL && last->c_next->c_time == 0)
-	callout = freep->c_next;
+	last = last->c_next;
-	(*freep->c_func)(freep->c_arg);
+    callout = last->c_next;
-	(void) free((char *) freep);
+    last->c_next = NULL;
-	if (callout && callout->c_time)
-	    break;
-    }
 
     /*
      * Set a new itimer if there are more timeouts scheduled.
@@ -936,7 +997,7 @@ alrm(sig, code, scp, addr)
 	itv.it_interval.tv_sec = itv.it_interval.tv_usec = 0;
 	itv.it_value.tv_usec = 0;
 	itv.it_value.tv_sec = callout->c_time;
-	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds.",
+	MAINDEBUG((LOG_DEBUG, "Setting itimer for %d seconds in alrm.",
 		   itv.it_value.tv_sec));
 	if (setitimer(ITIMER_REAL, &itv, NULL)) {
 	    syslog(LOG_ERR, "setitimer(ITIMER_REAL): %m");
@@ -947,6 +1008,17 @@ alrm(sig, code, scp, addr)
 	    die(1);
 	}
     }
+
+    /*
+     * Now call all the timeout routines scheduled for this time.
+     */
+    while (list) {
+	(*list->c_func)(list->c_arg);
+	freep = list;
+	list = list->c_next;
+	(void) free((char *) freep);
+    }
+  
 }
 
 
@@ -1000,10 +1072,13 @@ io(sig, code, scp, addr)
 	    return;
 
 	if (len == 0) {
-	    syslog(LOG_ERR, "End of file on fd!");
+	    syslog(LOG_WARNING, "End of file on fd!");
 	    die(1);
 	}
 
+	if (debug /*&& (debugflags & DBG_INPACKET)*/)
+	    log_packet(p, len, "rcvd ");
+
 	if (len < DLLHEADERLEN) {
 	    MAINDEBUG((LOG_INFO, "io(): Received short packet."));
 	    return;
@@ -1019,8 +1094,6 @@ io(sig, code, scp, addr)
 	if (protocol != LCP && lcp_fsm[0].state != OPENED) {
 	    MAINDEBUG((LOG_INFO,
 		       "io(): Received non-LCP packet when LCP not open."));
-	    if (debug)
-		dumpbuffer(inpacket_buf, len + DLLHEADERLEN, LOG_INFO);
 	    return;
 	}
 
@@ -1098,10 +1171,11 @@ nodebug(sig)
 
 
 /*
- * set_up_connection - run a program to initialize the serial connector
+ * device_script - run a program to connect or disconnect the
+ * serial device.
  */
 int
-set_up_connection(program, in, out)
+device_script(program, in, out)
     char *program;
     int in, out;
 {
@@ -1133,10 +1207,10 @@ set_up_connection(program, in, out)
 	/* NOTREACHED */
     }
 
-    while (waitpid(pid, &status, 0) != pid) {
+    while (waitpid(pid, &status, 0) < 0) {
 	if (errno == EINTR)
 	    continue;
-	syslog(LOG_ERR, "waiting for connection process: %m");
+	syslog(LOG_ERR, "waiting for (dis)connection process: %m");
 	die(1);
     }
     sigprocmask(SIG_SETMASK, &mask, NULL);
@@ -1146,82 +1220,154 @@ set_up_connection(program, in, out)
 
 
 /*
- * Return user specified netmask. A value of zero means no netmask has
+ * run-program - execute a program with given arguments,
- * been set. 
+ * but don't wait for it.
+ * If the program can't be executed, logs an error unless
+ * must_exist is 0 and the program file doesn't exist.
  */
-/* ARGSUSED */
+int
-u_long
+run_program(prog, args, must_exist)
-GetMask(addr)
+    char *prog;
-    u_long addr;
+    char **args;
+    int must_exist;
 {
-    return(netmask);
+    int pid;
+
+    pid = fork();
+    if (pid == -1) {
+	syslog(LOG_ERR, "can't fork to run %s: %m", prog);
+	return -1;
+    }
+    if (pid == 0) {
+	execv(prog, args);
+	if (must_exist || errno != ENOENT)
+	    syslog(LOG_WARNING, "can't execute %s: %m", prog);
+	_exit(-1);
+    }
+    MAINDEBUG((LOG_DEBUG, "Script %s started; pid = %d", prog, pid));
+    ++n_children;
+    return 0;
 }
 
+
 /*
- * dumpbuffer - print contents of a buffer in hex to standard output.
+ * reap_kids - get status from any dead child processes,
+ * and log a message for abnormal terminations.
  */
 void
-dumpbuffer(buffer, size, level)
+reap_kids()
-    unsigned char *buffer;
-    int size;
-    int level;
 {
-    register int i;
+    int pid, status;
-    char line[256], *p;
 
-    printf("%d bytes:\n", size);
+    if (n_children == 0)
-    while (size > 0)
+	return;
-    {
+    if ((pid = waitpid(-1, &status, WNOHANG)) == -1) {
-	p = line;
+	if (errno != ECHILD)
-	sprintf(p, "%08lx: ", buffer);
+	    syslog(LOG_ERR, "waitpid: %m");
-	p += 10;
+	return;
-		
+    }
-	for (i = 0; i < 8; i++, p += 3)
+    if (pid > 0) {
-	    if (size - i <= 0)
+	--n_children;
-		sprintf(p, "xx ");
+	if (WIFSIGNALED(status)) {
-	    else
+	    syslog(LOG_WARNING, "child process %d terminated with signal %d",
-		sprintf(p, "%02x ", buffer[i]);
+		   pid, WTERMSIG(status));
-
+	}
-	for (i = 0; i < 8; i++)
-	    if (size - i <= 0)
-		*p++ = 'x';
-	    else
-		*p++ = (' ' <= buffer[i] && buffer[i] <= '~') ?
-		    buffer[i] : '.';
-
-	*p++ = 0;
-	buffer += 8;
-	size -= 8;
-
-/*	syslog(level, "%s\n", line); */
-	printf("%s\n", line);
-	fflush(stdout);
     }
 }
 
 
 /*
- * setdtr - control the DTR line on the serial port.
+ * log_packet - format a packet and log it.
- * This is called from die(), so it shouldn't call die().
  */
-setdtr(fd, on)
-int fd, on;
-{
-    int modembits = TIOCM_DTR;
 
-    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+char line[256];			/* line to be logged accumulated here */
+char *linep;
+
+void
+log_packet(p, len, prefix)
+    u_char *p;
+    int len;
+    char *prefix;
+{
+    strcpy(line, prefix);
+    linep = line + strlen(line);
+    format_packet(p, len, pr_log, NULL);
+    if (linep != line)
+	syslog(LOG_DEBUG, "%s", line);
 }
 
+/*
+ * format_packet - make a readable representation of a packet,
+ * calling `printer(arg, format, ...)' to output it.
+ */
+void
+format_packet(p, len, printer, arg)
+    u_char *p;
+    int len;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int i, n;
+    u_short proto;
+    u_char x;
+
+    if (len >= DLLHEADERLEN && p[0] == ALLSTATIONS && p[1] == UI) {
+	p += 2;
+	GETSHORT(proto, p);
+	len -= DLLHEADERLEN;
+	for (i = 0; i < N_PROTO; ++i)
+	    if (proto == prottbl[i].protocol)
+		break;
+	if (i < N_PROTO) {
+	    printer(arg, "[%s", prottbl[i].name);
+	    n = (*prottbl[i].printpkt)(p, len, printer, arg);
+	    printer(arg, "]");
+	    p += n;
+	    len -= n;
+	} else {
+	    printer(arg, "[proto=0x%x]", proto);
+	}
+    }
+
+    for (; len > 0; --len) {
+	GETCHAR(x, p);
+	printer(arg, " %.2x", x);
+    }
+}
+
+#ifdef __STDC__
+#include <stdarg.h>
+
+void
+pr_log(void *arg, char *fmt, ...)
+{
+    int n;
+    va_list pvar;
+    char buf[256];
+
+    va_start(pvar, fmt);
+    vsprintf(buf, fmt, pvar);
+    va_end(pvar);
+
+    n = strlen(buf);
+    if (linep + n + 1 > line + sizeof(line)) {
+	syslog(LOG_DEBUG, "%s", line);
+	linep = line;
+    }
+    strcpy(linep, buf);
+    linep += n;
+}
+
+#else /* __STDC__ */
 #include <varargs.h>
 
-char line[256];
+void
-char *p;
+pr_log(arg, fmt, va_alist)
-
+void *arg;
-logf(level, fmt, va_alist)
-int level;
 char *fmt;
 va_dcl
 {
+    int n;
     va_list pvar;
     char buf[256];
 
@@ -1229,15 +1375,43 @@ va_dcl
     vsprintf(buf, fmt, pvar);
     va_end(pvar);
 
-    p = line + strlen(line);
+    n = strlen(buf);
-    strcat(p, buf);
+    if (linep + n + 1 > line + sizeof(line)) {
-
+	syslog(LOG_DEBUG, "%s", line);
-    if (buf[strlen(buf)-1] == '\n') {
+	linep = line;
-	syslog(level, "%s", line);
-	line[0] = 0;
     }
+    strcpy(linep, buf);
+    linep += n;
+}
+#endif
+
+/*
+ * print_string - print a readable representation of a string using
+ * printer.
+ */
+void
+print_string(p, len, printer, arg)
+    char *p;
+    int len;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int c;
+
+    printer(arg, "\"");
+    for (; len > 0; --len) {
+	c = *p++;
+	if (' ' <= c && c <= '~')
+	    printer(arg, "%c", c);
+	else
+	    printer(arg, "\\%.3o", c);
+    }
+    printer(arg, "\"");
 }
 
+/*
+ * novm - log an error message saying we ran out of memory, and die.
+ */
 void
 novm(msg)
     char *msg;

usr.sbin/pppd/pppd/options.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: options.c,v 1.5 1994/02/22 00:12:01 paulus Exp $";
+static char rcsid[] = "$Id: options.c,v 1.6 1994/05/08 12:16:26 paulus Exp $";
 #endif
 
 #include <stdio.h>
@@ -45,11 +45,11 @@ static char rcsid[] = "$Id: options.c,v 1.5 1994/02/22 00:12:01 paulus Exp $";
 #define FALSE	0
 #define TRUE	1
 
-
 /*
  * Prototypes
  */
 static int setdebug __ARGS((void));
+static int setkdebug __ARGS((char **));
 static int setpassive __ARGS((void));
 static int setsilent __ARGS((void));
 static int noopt __ARGS((void));
@@ -65,16 +65,20 @@ static int noasyncmap __ARGS((void));
 static int noipaddr __ARGS((void));
 static int nomagicnumber __ARGS((void));
 static int setasyncmap __ARGS((char **));
+static int setescape __ARGS((char **));
 static int setmru __ARGS((char **));
+static int setmtu __ARGS((char **));
 static int nomru __ARGS((void));
 static int nopcomp __ARGS((void));
 static int setconnector __ARGS((char **));
+static int setdisconnector __ARGS((char **));
 static int setdomain __ARGS((char **));
 static int setnetmask __ARGS((char **));
 static int setcrtscts __ARGS((void));
 static int setnodetach __ARGS((void));
 static int setmodem __ARGS((void));
 static int setlocal __ARGS((void));
+static int setlock __ARGS((void));
 static int setname __ARGS((char **));
 static int setuser __ARGS((char **));
 static int setremote __ARGS((char **));
@@ -110,10 +114,13 @@ static int number_option __ARGS((char *, long *, int));
  */
 extern char *progname;
 extern int debug;
+extern int kdebugflag;
 extern int modem;
+extern int lockflag;
 extern int crtscts;
 extern int nodetach;
 extern char *connector;
+extern char *disconnector;
 extern int inspeed;
 extern char devname[];
 extern int default_device;
@@ -156,16 +163,21 @@ static struct cmd {
     "-chap", 0, nochap,		/* Don't allow CHAP authentication with peer */
     "-vj", 0, setnovj,		/* disable VJ compression */
     "asyncmap", 1, setasyncmap,	/* set the desired async map */
+    "escape", 1, setescape,	/* set chars to escape on transmission */
     "connect", 1, setconnector,	/* A program to set up a connection */
+    "disconnect", 1, setdisconnector,	/* program to disconnect serial dev. */
     "crtscts", 0, setcrtscts,	/* set h/w flow control */
     "debug", 0, setdebug,	/* Increase debugging level */
+    "kdebug", 1, setkdebug,	/* Enable kernel-level debugging */
     "domain", 1, setdomain,	/* Add given domain name to hostname*/
     "mru", 1, setmru,		/* Set MRU value for negotiation */
+    "mtu", 1, setmtu,		/* Set our MTU */
     "netmask", 1, setnetmask,	/* set netmask */
     "passive", 0, setpassive,	/* Set passive mode */
     "silent", 0, setsilent,	/* Set silent mode */
     "modem", 0, setmodem,	/* Use modem control lines */
     "local", 0, setlocal,	/* Don't use modem control lines */
+    "lock", 0, setlock,		/* Lock serial device (with lock file) */
     "name", 1, setname,		/* Set local name for authentication */
     "user", 1, setuser,		/* Set username for PAP auth with peer */
     "usehostname", 0, setusehostname,	/* Must use hostname for auth. */
@@ -215,34 +227,6 @@ Usage: %s [ arguments ], where arguments are:\n\
 See pppd(8) for more options.\n\
 ";
 
-/*
-Options omitted:
-	-all		Don't request/allow any options\n\
-	-ac		Disable Address/Control compression\n\
-	-am		Disable asyncmap negotiation\n\
-	-as <n>		Set the desired async map to hex <n>\n\
-	-d		Increase debugging level\n\
-	-detach		Don't fork to background\n\
-	-ip		Disable IP address negotiation\n\
-	-mn		Disable magic number negotiation\n\
-	-mru		Disable mru negotiation\n\
-	-p		Set passive mode\n\
-	-pc		Disable protocol field compression\n\
-	+ua <f>		Get username and password for authenticating\n\
-			with peer using PAP from file <f>\n\
-	+pap		Require PAP authentication from peer\n\
-	-pap		Don't agree to authenticating with peer using PAP\n\
-	+chap		Require CHAP authentication from peer\n\
-	-chap		Don't agree to authenticating with peer using CHAP\n\
-        -vj             disable VJ compression\n\
-	-auth		Don't agree to authenticate with peer\n\
-	debug		Increase debugging level\n\
-        domain <d>      Append domain name <d> to hostname for authentication\n\
-	passive		Set passive mode\n\
-	local		Don't use modem control lines\n\
-	proxyarp	Add proxy ARP entry\n\
-*/
-
 
 /*
  * parse_args - parse a string of arguments, from the command
@@ -319,7 +303,7 @@ options_from_file(filename, must_exist)
 	if (!must_exist && errno == ENOENT)
 	    return 1;
 	perror(filename);
-	exit(1);
+	return 0;
     }
     while (getword(f, cmd, &newline, filename)) {
 	/*
@@ -549,10 +533,19 @@ static int
 setdebug()
 {
     debug++;
-    setlogmask(LOG_UPTO(LOG_DEBUG));
     return (1);
 }
 
+/*
+ * setkdebug - Set kernel debugging level.
+ */
+static int
+setkdebug(argv)
+    char **argv;
+{
+    return int_option(*argv, &kdebugflag);
+}
+
 /*
  * noopt - Disable all options.
  */
@@ -643,6 +636,27 @@ setmru(argv)
 }
 
 
+/*
+ * setmru - Set the largest MTU we'll use.
+ */
+static int
+setmtu(argv)
+    char **argv;
+{
+    long mtu;
+
+    if (!number_option(*argv, &mtu, 0))
+	return 0;
+    if (mtu < MINMRU || mtu > MAXMRU) {
+	fprintf(stderr, "mtu option value of %d is too %s\n", mtu,
+		(mtu < MINMRU? "small": "large"));
+	return 0;
+    }
+    lcp_allowoptions[0].mru = mtu;
+    return (1);
+}
+
+
 /*
  * nopcomp - Disable Protocol field compression negotiation.
  */
@@ -716,7 +730,7 @@ setupapfile(argv)
     /* open user info file */
     if ((ufile = fopen(*argv, "r")) == NULL) {
 	fprintf(stderr, "unable to open user login data file %s\n", *argv);
-	exit(1);
+	return 0;
     }
     check_access(ufile, *argv);
 
@@ -724,7 +738,7 @@ setupapfile(argv)
     if (fgets(user, MAXNAMELEN - 1, ufile) == NULL
 	|| fgets(passwd, MAXSECRETLEN - 1, ufile) == NULL){
 	fprintf(stderr, "Unable to read user login data file %s.\n", *argv);
-	exit(2);
+	return 0;
     }
     fclose(ufile);
 
@@ -788,6 +802,20 @@ setconnector(argv)
     return (1);
 }
 
+/*
+ * setdisconnector - Set a program to disconnect from the serial line
+ */
+static int
+setdisconnector(argv)
+    char **argv;
+{
+    disconnector = strdup(*argv);
+    if (disconnector == NULL)
+	novm("disconnector string");
+  
+    return (1);
+}
+
 
 /*
  * setdomain - Set domain name to append to hostname 
@@ -801,6 +829,10 @@ setdomain(argv)
     return (1);
 }
 
+
+/*
+ * setasyncmap - add bits to asyncmap (what we request peer to escape).
+ */
 static int
 setasyncmap(argv)
     char **argv;
@@ -814,6 +846,38 @@ setasyncmap(argv)
     return(1);
 }
 
+
+/*
+ * setescape - add chars to the set we escape on transmission.
+ */
+static int
+setescape(argv)
+    char **argv;
+{
+    int n, ret;
+    char *p, *endp;
+
+    p = *argv;
+    ret = 1;
+    while (*p) {
+	n = strtol(p, &endp, 16);
+	if (p == endp) {
+	    fprintf(stderr, "%s: invalid hex number: %s\n", progname, p);
+	    return 0;
+	}
+	p = endp;
+	if (n < 0 || 0x20 <= n && n <= 0x3F || n == 0x5E || n > 0xFF) {
+	    fprintf(stderr, "%s: can't escape character 0x%x\n", n);
+	    ret = 0;
+	} else
+	    xmit_accm[0][n >> 5] |= 1 << (n & 0x1F);
+	while (*p == ',' || *p == ' ')
+	    ++p;
+    }
+    return ret;
+}
+
+
 /*
  * setspeed - Set the speed.
  */
@@ -857,7 +921,7 @@ setdevname(cp)
 	if (errno == ENOENT)
 	    return (0);
 	syslog(LOG_ERR, cp);
-	exit(1);
+	return 0;
     }
   
     (void) strncpy(devname, cp, MAXPATHLEN);
@@ -1006,13 +1070,26 @@ setnetmask(argv)
 	
     if ((mask = inet_addr(*argv)) == -1) {
 	fprintf(stderr, "Invalid netmask %s\n", *argv);
-	exit(1);
+	return 0;
     }
 
     netmask = mask;
     return (1);
 }
 
+/*
+ * Return user specified netmask. A value of zero means no netmask has
+ * been set. 
+ */
+/* ARGSUSED */
+u_long
+GetMask(addr)
+    u_long addr;
+{
+    return(netmask);
+}
+
+
 static int
 setcrtscts()
 {
@@ -1041,6 +1118,13 @@ setlocal()
     return 1;
 }
 
+static int
+setlock()
+{
+    lockflag = 1;
+    return 1;
+}
+
 static int
 setusehostname()
 {

usr.sbin/pppd/pppd/patchlevel.h

@@ -1,5 +1,5 @@
-/* $Id: patchlevel.h,v 1.6 1994/02/22 00:12:03 paulus Exp $ */
+/* $Id: patchlevel.h,v 1.7 1994/05/08 12:16:27 paulus Exp $ */
-#define	PATCHLEVEL	4
+#define	PATCHLEVEL	0
 
-#define VERSION	"2.0"
+#define VERSION	"2.1"
-#define DATE	"9 Feb 94"
+#define DATE	"1 May 94"

usr.sbin/pppd/pppd/pathnames.h

@@ -1,10 +1,10 @@
 /*
  * define path names
  *
- * $Id: pathnames.h,v 1.4 1993/11/10 01:34:26 paulus Exp $
+ * $Id: pathnames.h,v 1.5 1994/05/08 12:16:28 paulus Exp $
  */
 
-#ifdef STREAMS
+#if defined(STREAMS) || defined(ultrix)
 #define _PATH_PIDFILE 	"/etc/ppp"
 #else
 #define _PATH_PIDFILE 	"/var/run"
@@ -13,3 +13,5 @@
 #define _PATH_UPAPFILE 	"/etc/ppp/pap-secrets"
 #define _PATH_CHAPFILE 	"/etc/ppp/chap-secrets"
 #define _PATH_SYSOPTIONS "/etc/ppp/options"
+#define _PATH_IPUP	"/etc/ppp/ip-up"
+#define _PATH_IPDOWN	"/etc/ppp/ip-down"

usr.sbin/pppd/pppd/pppd.8

@@ -1,5 +1,5 @@
 .\" manual page [] for pppd 2.0
-.\" $Id: pppd.8,v 1.5 1994/02/22 00:12:04 paulus Exp $
+.\" $Id: pppd.8,v 1.6 1994/05/08 12:16:29 paulus Exp $
 .\" SH section heading
 .\" SS subsection heading
 .\" LP paragraph
@@ -50,20 +50,23 @@ Set the async character map to <map>.
 This map describes which control characters cannot be successfully
 received over the serial line.
 .I pppd
-will ask the peer to send these characters as a 2-byte "escape" sequence.
+will ask the peer to send these characters as a 2-byte escape sequence.
 The argument is a 32 bit hex number
 with each bit representing a character to escape. 
 Bit 0 (00000001) represents the character 0x00;
 bit 31 (80000000) represents the character 0x1f or ^_.
-The default asyncmap is 0.  If multiple \fBasyncmap\fR options are
+If multiple \fBasyncmap\fR options are
 given, the values are ORed together.
+If no \fBasyncmap\fR option is given, no async character map will be
+negotiated for the receive direction; the peer will then escape
+\fIall\fR control characters.
 .TP
 .B auth
 Require the peer to authenticate itself before allowing network
 packets to be sent or received.
 .TP
 .B connect \fI<p>
-Use the executable or shell command specified by <p> to set up the
+Use the executable or shell command specified by \fI<p>\fR to set up the
 serial line.  This script would typically use the "chat" program to
 dial the modem and start the remote ppp session.
 .TP
@@ -76,14 +79,33 @@ Add a default route to the system routing tables, using the peer as
 the gateway, when IPCP negotiation is successfully completed.
 This entry is removed when the PPP connection is broken.
 .TP
+.B disconnect \fI<p>
+Run the executable or shell command specified by \fI<p>\fR after
+\fIpppd\fR has terminated the link.  This script could, for example,
+issue commands to the modem to cause it to hang up.
+.TP
+.B escape \fIxx,yy,...
+Specifies that certain characters should be escaped on transmission
+(regardless of whether the peer requests them to be escaped with its
+async control character map).  The characters to be escaped are
+specified as a list of hex numbers separated by commas.  Note that
+almost any character can be specified for the \fBescape\fR option,
+unlike the \fBasyncmap\fR option which only allows control characters
+to be specified.  The characters which may not be escaped are those
+with hex values 0x20 - 0x3f or 0x5e.
+.TP
 .B file \fI<f>
 Read options from file <f> (the format is described below).
 .TP
+.B lock
+Specifies that \fIpppd\fR should use a UUCP-style lock on the serial
+device to ensure exclusive access to the device.
+.TP
 .B mru \fI<n>
 Set the MRU [Maximum Receive Unit] value to <n> for negotiation.
 .I pppd
 will ask the peer to send packets of no more than <n> bytes.
- The minimum MRU value is 128. 
+The minimum MRU value is 128. 
 The default MRU value is 1500.  A value of 296 is recommended for slow
 links (40 bytes for TCP/IP header + 256 bytes of data).
 .TP
@@ -132,17 +154,18 @@ default values).
 .TP
 .B -ac
 Disable Address/Control compression negotiation (use default, i.e.
-disabled).
+address/control field disabled).
 .TP
 .B -am
-Disable asyncmap negotiation (use default, i.e. 0xffffffff).
+Disable asyncmap negotiation (use the default asyncmap, i.e. escape
+all control characters).
 .TP
 .B -as \fI<n>
 Same as
 .B asyncmap \fI<n>
 .TP
 .B -d
-Increase debugging level.
+Increase debugging level (same as the \fBdebug\fR option).
 .TP
 .B -detach
 Don't fork to become a background process (otherwise
@@ -168,7 +191,8 @@ Same as the
 option.
 .TP
 .B -pc
-Disable protocol field compression negotiation (use default, i.e. disabled).
+Disable protocol field compression negotiation (use default, i.e.
+protocol field compression disabled).
 .TP
 .B +ua \fI<p>
 Agree to authenticate using PAP [Password Authentication Protocol] if
@@ -196,9 +220,13 @@ Disable negotiation of Van Jacobson style IP header compression (use
 default, i.e. no compression).
 .TP
 .B debug
-Increase debugging level (same as
+Increase debugging level (same as \fB\-d\fR).
-.B -d
+If this
-).
+option is given, \fIpppd\fR will log the contents of all control
+packets sent or received in a readable form.  The packets are logged
+through syslog with facility \fIdaemon\fR and level \fIdebug\fR.  This
+information can be directed to a file by setting up /etc/syslog.conf
+appropriately (see syslog.conf(5)).
 .TP
 .B domain \fI<d>
 Append the domain name <d> to the local host name for authentication
@@ -209,9 +237,22 @@ domain option to set the domain name to Quotron.COM.
 .B modem
 Use the modem control lines.  (This option is not fully implemented.)
 .TP
+.B kdebug \fIn
+Enable debugging code in the kernel-level PPP driver.  The argument
+\fIn\fR is a number which is the sum of the following values: 1 to
+enable general debug messages, 2 to request that the contents of
+received packets be printed, and 4 to request that the contents of
+transmitted packets be printed.
+.TP
 .B local
 Don't use the modem control lines.
 .TP
+.B mtu \fI<n>
+Set the MTU [Maximum Transmit Unit] value to \fI<n>\fR.  Unless the
+peer requests a smaller value via MRU negotiation, \fIpppd\fR will
+request that the kernel networking code send data packets of no more
+than \fIn\fR bytes through the PPP network interface. 
+.TP
 .B name \fI<n>
 Set the name of the local system for authentication purposes to <n>.
 .TP
@@ -429,6 +470,16 @@ other Network Control Protocol) can be started.  If authentication
 fails, \fIpppd\fR will terminated the link (by closing LCP).  If IPCP
 negotiates an unacceptable IP address for the remote host, IPCP will
 be closed.  IP packets can only be sent or received when IPCP is open.
+.LP
+In some cases it is desirable to allow some hosts which can't
+authenticate themselves to connect and use one of a restricted set of
+IP addresses, even when the local host generally requires
+authentication.  If the peer refuses to authenticate itself when
+requested, \fIpppd\fR takes that as equivalent to authenticating with
+PAP using the empty string for the username and password.  Thus, by
+adding a line to the pap-secrets file which specifies the empty string
+for the client and password, it is possible to allow restricted access
+to hosts which refuse to authenticate themselves.
 .SH ROUTING
 .LP
 When IPCP negotiation is completed successfully,
@@ -483,29 +534,34 @@ for example:
 pppd /dev/ttya 38400 connect 'chat "" "" "login:" "username"
 "Password:" "password" "% " "exec pppd passive"'
 .LP
+(Note however that running chat like this will leave the password
+visible in the parameter list of pppd and chat.)
+.LP
 If your serial connection is any more complicated than a piece of
 wire, you may need to arrange for some control characters to be
 escaped.  In particular, it is often useful to escape XON (^Q) and
 XOFF (^S), using \fBasyncmap a0000\fR.  If the path includes a telnet,
 you probably should escape ^] as well (\fBasyncmap 200a0000\fR).
-Don't use an rlogin in the path - many implementations are not
+If the path includes an rlogin, you will need to use the \fBescape
+ff\fR option on the end which is running the rlogin client, since many
+rlogin implementations are not
 transparent; they will remove the sequence [0xff, 0xff, 0x73, 0x73,
 followed by any 8 bytes] from the stream.
 .SH DIAGNOSTICS
 .LP
-Messages are sent to the syslog daemon using facility
+Messages are sent to the syslog daemon using facility LOG_DAEMON.
-LOG_DAEMON unless
+(This can be overriden by recompiling \fIpppd\fR with the macro
-.I pppd
+LOG_PPP defined as the desired facility.)  In order to see the error
-has been compiled with debugging code.  In this case the logging
+and debug messages, you will need to edit your /etc/syslog.conf file
-facility used will be LOG_LOCAL2 in order to allow separation of the debug
+to direct the messages to the desired output device or file.
-output from the other daemons using the  LOG_DAEMON facility.  You can
-override this by defining the macro LOG_PPP to the desired facility
-and recompiling.  In order to see the error and debug messages, you
-will need to edit your /etc/syslog.conf file to direct the messages to
-the desired output device or file.
 .LP
-If enabled at compile time, debugging printout can be enabled by
+The \fBdebug\fR option causes the contents of all control packets sent
-setting the -d or debug flag on the command line, or by sending a
+or received to be logged, that is, all LCP, PAP, CHAP or IPCP packets.
+This can be useful if the PPP negotiation does not succeed.
+If debugging is enabled at compile time, the \fBdebug\fR option also
+causes other debugging messages to be logged.
+.LP
+Debugging can also be enabled by sending a
 SIGUSR1 to the
 .I pppd
 process.
@@ -542,12 +598,6 @@ Rivest, R.
 .I The MD5 Message-Digest Algorithm.
 1992 April.
 .TP
-.B RFC1331
-Simpson, W.A.
-.I Point\-to\-Point Protocol (PPP) for the transmission of multi\-protocol
-.I datagrams over point\-to\-point links.
-1992 May.
-.TP
 .B RFC1332
 McGregor, G.
 .I PPP Internet Protocol Control Protocol (IPCP).
@@ -557,6 +607,16 @@ McGregor, G.
 Lloyd, B.; Simpson, W.A.
 .I PPP authentication protocols.
 1992 October.
+.TP
+.B RFC1548
+Simpson, W.A.
+.I The Point\-to\-Point Protocol (PPP).
+1993 December.
+.TP
+.B RFC1549
+Simpson, W.A.
+.I PPP in HDLC Framing.
+1993 December
 .SH NOTES
 The following signals have the specified effect when sent to the
 .I pppd

usr.sbin/pppd/pppd/pppd.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: pppd.h,v 1.4 1993/11/10 01:34:32 paulus Exp $
+ * $Id: pppd.h,v 1.5 1994/05/08 12:16:30 paulus Exp $
  */
 
 /*
@@ -39,6 +39,9 @@
 #define MAXNAMELEN	256	/* max length of hostname or name for auth */
 #define MAXSECRETLEN	256	/* max length of password or secret */
 
+/*
+ * Global variables.
+ */
 extern int debug;		/* Debug flag */
 extern int ifunit;		/* Interface unit number */
 extern char ifname[];		/* Interface name */
@@ -46,7 +49,20 @@ extern int fd;			/* Device file descriptor */
 extern int s;			/* socket descriptor */
 extern char hostname[];		/* hostname */
 extern u_char outpacket_buf[];	/* buffer for outgoing packets */
+extern int phase;		/* See values below */
 
+/*
+ * Values for phase.
+ */
+#define PHASE_DEAD		0
+#define PHASE_ESTABLISH		1
+#define PHASE_AUTHENTICATE	2
+#define PHASE_NETWORK		3
+#define PHASE_TERMINATE		4
+
+/*
+ * Prototypes.
+ */
 void quit __ARGS((void));	/* Cleanup and exit */
 void timeout __ARGS((void (*)(), caddr_t, int));
 				/* Look-alike of kernel's timeout() */

usr.sbin/pppd/pppd/sys-bsd.c

@@ -19,7 +19,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/01/25 05:58:14 paulus Exp $";
+static char rcsid[] = "$Id: sys-bsd.c,v 1.4 1994/05/08 12:16:31 paulus Exp $";
 #endif
 
 /*
@@ -42,8 +42,8 @@ static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/01/25 05:58:14 paulus Exp $";
 #include "pppd.h"
 #include "ppp.h"
 
-static int initdisc;		/* Initial TTY discipline */
+static int initdisc = -1;		/* Initial TTY discipline */
-
+extern int kdebugflag;
 
 /*
  * establish_ppp - Turn the serial port into a ppp interface.
@@ -52,6 +52,7 @@ void
 establish_ppp()
 {
     int pppdisc = PPPDISC;
+    int x;
 
     if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
@@ -69,6 +70,19 @@ establish_ppp()
 	syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
 	die(1);
     }
+
+    /*
+     * Enable debug in the driver if requested.
+     */
+    if (kdebugflag) {
+	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	    syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
+	} else {
+	    x |= (kdebugflag & 0xFF) * SC_DEBUG;
+	    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+		syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
+	}
+    }
 }
 
 
@@ -79,8 +93,37 @@ establish_ppp()
 void
 disestablish_ppp()
 {
+    int x;
+    char *s;
+
+    if (initdisc >= 0) {
+	/*
+	 * Check whether the link seems not to be 8-bit clean.
+	 */
+	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
+	    s = NULL;
+	    switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
+	    case SC_RCV_B7_0:
+		s = "bit 7 set to 1";
+		break;
+	    case SC_RCV_B7_1:
+		s = "bit 7 set to 0";
+		break;
+	    case SC_RCV_EVNP:
+		s = "odd parity";
+		break;
+	    case SC_RCV_ODDP:
+		s = "even parity";
+		break;
+	    }
+	    if (s != NULL) {
+		syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
+		syslog(LOG_WARNING, "All received characters had %s", s);
+	    }
+	}
 	if (ioctl(fd, TIOCSETD, &initdisc) < 0)
 	    syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+    }
 }
 
 
@@ -95,6 +138,8 @@ output(unit, p, len)
 {
     if (unit != 0)
 	MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
+    if (debug)
+	log_packet(p, len, "sent ");
 
     if (write(fd, p, len) < 0) {
 	syslog(LOG_ERR, "write: %m");
@@ -161,9 +206,23 @@ ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
     }
 }
 
+
+/*
+ * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+void
+ppp_set_xaccm(unit, accm)
+    int unit;
+    ext_accm accm;
+{
+    if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
+	syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
+}
+
+
 /*
  * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.  At present this does nothing.
+ * the ppp interface.
  */
 void
 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
@@ -171,12 +230,16 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
     u_long asyncmap;
     int pcomp, accomp;
 {
-#ifdef notyet
+    int x;
+
+    if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
+	quit();
+    }
     if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
 	quit();
     }
-
     if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
 	quit();
@@ -186,14 +249,14 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	quit();
     }
-#endif	/* notyet */
 }
 
 /*
  * sifvjcomp - config tcp header compression
  */
 int
-sifvjcomp(u, vjcomp, cidcomp)
+sifvjcomp(u, vjcomp, cidcomp, maxcid)
+    int u, vjcomp, cidcomp, maxcid;
 {
     u_int x;
 
@@ -203,7 +266,11 @@ sifvjcomp(u, vjcomp, cidcomp)
     }
     x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
     x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
-    if(ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	return 0;
+    }
+    if (ioctl(fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	return 0;
     }
@@ -211,12 +278,14 @@ sifvjcomp(u, vjcomp, cidcomp)
 }
 
 /*
- * sifup - Config the interface up.
+ * sifup - Config the interface up and enable IP packets to pass.
  */
 int
 sifup(u)
 {
     struct ifreq ifr;
+    u_int x;
+
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
@@ -227,27 +296,51 @@ sifup(u)
 	syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
 	return 0;
     }
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	return 0;
+    }
+    x |= SC_ENABLE_IP;
+    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	return 0;
+    }
     return 1;
 }
 
 /*
- * sifdown - Config the interface down.
+ * sifdown - Config the interface down and disable IP.
  */
 int
 sifdown(u)
 {
     struct ifreq ifr;
+    u_int x;
+    int rv;
+
+    rv = 1;
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	rv = 0;
+    } else {
+	x &= ~SC_ENABLE_IP;
+	if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	    syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	    rv = 0;
+	}
+    }
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
-	return 0;
+	rv = 0;
-    }
+    } else {
 	ifr.ifr_flags &= ~IFF_UP;
 	if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 	    syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
-	return 0;
+	    rv = 0;
 	}
-    return 1;
+    }
+    return rv;
 }
 
 /*
@@ -481,11 +574,11 @@ get_ether_addr(ipaddr, hwaddr)
     return 0;
 }
 
+
 /*
  * ppp_available - check whether the system has any ppp interfaces
  * (in fact we check whether we can do an ioctl on ppp0).
  */
-
 int
 ppp_available()
 {

usr.sbin/pppd/pppd/upap.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: upap.c,v 1.3 1993/11/10 01:34:35 paulus Exp $";
+static char rcsid[] = "$Id: upap.c,v 1.4 1994/05/08 12:16:32 paulus Exp $";
 #endif
 
 /*
@@ -310,7 +310,7 @@ upap_rauthreq(u, inp, id, len)
 	return;
     }
     GETCHAR(ruserlen, inp);
-    len -= sizeof (u_char) + ruserlen + sizeof (u_char);;
+    len -= sizeof (u_char) + ruserlen + sizeof (u_char);
     if (len < 0) {
 	UPAPDEBUG((LOG_INFO, "upap_rauth: rcvd short packet."));
 	return;
@@ -482,3 +482,80 @@ upap_sresp(u, code, id, msg, msglen)
 
     UPAPDEBUG((LOG_INFO, "upap_sresp: Sent code %d, id %d.", code, id));
 }
+
+/*
+ * upap_printpkt - print the contents of a PAP packet.
+ */
+char *upap_codenames[] = {
+    "AuthReq", "AuthAck", "AuthNak"
+};
+
+int
+upap_printpkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int code, id, len;
+    int mlen, ulen, wlen;
+    char *user, *pwd, *msg;
+    u_char *pstart;
+
+    if (plen < UPAP_HEADERLEN)
+	return 0;
+    pstart = p;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < UPAP_HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(upap_codenames) / sizeof(char *))
+	printer(arg, " %s", upap_codenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= UPAP_HEADERLEN;
+    switch (code) {
+    case UPAP_AUTHREQ:
+	if (len < 1)
+	    break;
+	ulen = p[0];
+	if (len < ulen + 2)
+	    break;
+	wlen = p[ulen + 1];
+	if (len < ulen + wlen + 2)
+	    break;
+	user = (char *) (p + 1);
+	pwd = (char *) (p + ulen + 2);
+	p += ulen + wlen + 2;
+	len -= ulen + wlen + 2;
+	printer(arg, " user=");
+	print_string(user, ulen, printer, arg);
+	printer(arg, " password=");
+	print_string(pwd, wlen, printer, arg);
+	break;
+    case UPAP_AUTHACK:
+    case UPAP_AUTHNAK:
+	if (len < 1)
+	    break;
+	mlen = p[0];
+	if (len < mlen + 1)
+	    break;
+	msg = (char *) (p + 1);
+	p += mlen + 1;
+	len -= mlen + 1;
+	printer(arg, "msg=");
+	print_string(msg, mlen, printer, arg);
+	break;
+    }
+
+    /* print the rest of the bytes in the packet */
+    for (; len > 0; --len) {
+	GETCHAR(code, p);
+	printer(arg, " %.2x", code);
+    }
+
+    return p - pstart;
+}

usr.sbin/pppd/pppd/upap.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: upap.h,v 1.3 1993/11/10 01:34:38 paulus Exp $
+ * $Id: upap.h,v 1.4 1994/05/08 12:16:34 paulus Exp $
  */
 
 /*
@@ -87,3 +87,5 @@ void upap_lowerup __ARGS((int));
 void upap_lowerdown __ARGS((int));
 void upap_input __ARGS((int, u_char *, int));
 void upap_protrej __ARGS((int));
+int  upap_printpkt __ARGS((u_char *, int,
+			   void (*) __ARGS((void *, char *, ...)), void *));

usr.sbin/pppd/sys-bsd.c

@@ -19,7 +19,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/01/25 05:58:14 paulus Exp $";
+static char rcsid[] = "$Id: sys-bsd.c,v 1.4 1994/05/08 12:16:31 paulus Exp $";
 #endif
 
 /*
@@ -42,8 +42,8 @@ static char rcsid[] = "$Id: sys-bsd.c,v 1.3 1994/01/25 05:58:14 paulus Exp $";
 #include "pppd.h"
 #include "ppp.h"
 
-static int initdisc;		/* Initial TTY discipline */
+static int initdisc = -1;		/* Initial TTY discipline */
-
+extern int kdebugflag;
 
 /*
  * establish_ppp - Turn the serial port into a ppp interface.
@@ -52,6 +52,7 @@ void
 establish_ppp()
 {
     int pppdisc = PPPDISC;
+    int x;
 
     if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
 	syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
@@ -69,6 +70,19 @@ establish_ppp()
 	syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
 	die(1);
     }
+
+    /*
+     * Enable debug in the driver if requested.
+     */
+    if (kdebugflag) {
+	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	    syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
+	} else {
+	    x |= (kdebugflag & 0xFF) * SC_DEBUG;
+	    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+		syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
+	}
+    }
 }
 
 
@@ -79,8 +93,37 @@ establish_ppp()
 void
 disestablish_ppp()
 {
+    int x;
+    char *s;
+
+    if (initdisc >= 0) {
+	/*
+	 * Check whether the link seems not to be 8-bit clean.
+	 */
+	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
+	    s = NULL;
+	    switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
+	    case SC_RCV_B7_0:
+		s = "bit 7 set to 1";
+		break;
+	    case SC_RCV_B7_1:
+		s = "bit 7 set to 0";
+		break;
+	    case SC_RCV_EVNP:
+		s = "odd parity";
+		break;
+	    case SC_RCV_ODDP:
+		s = "even parity";
+		break;
+	    }
+	    if (s != NULL) {
+		syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
+		syslog(LOG_WARNING, "All received characters had %s", s);
+	    }
+	}
 	if (ioctl(fd, TIOCSETD, &initdisc) < 0)
 	    syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+    }
 }
 
 
@@ -95,6 +138,8 @@ output(unit, p, len)
 {
     if (unit != 0)
 	MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
+    if (debug)
+	log_packet(p, len, "sent ");
 
     if (write(fd, p, len) < 0) {
 	syslog(LOG_ERR, "write: %m");
@@ -161,9 +206,23 @@ ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
     }
 }
 
+
+/*
+ * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+void
+ppp_set_xaccm(unit, accm)
+    int unit;
+    ext_accm accm;
+{
+    if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
+	syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
+}
+
+
 /*
  * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.  At present this does nothing.
+ * the ppp interface.
  */
 void
 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
@@ -171,12 +230,16 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
     u_long asyncmap;
     int pcomp, accomp;
 {
-#ifdef notyet
+    int x;
+
+    if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
+	quit();
+    }
     if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
 	quit();
     }
-
     if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
 	quit();
@@ -186,14 +249,14 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	quit();
     }
-#endif	/* notyet */
 }
 
 /*
  * sifvjcomp - config tcp header compression
  */
 int
-sifvjcomp(u, vjcomp, cidcomp)
+sifvjcomp(u, vjcomp, cidcomp, maxcid)
+    int u, vjcomp, cidcomp, maxcid;
 {
     u_int x;
 
@@ -203,7 +266,11 @@ sifvjcomp(u, vjcomp, cidcomp)
     }
     x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
     x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
-    if(ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	return 0;
+    }
+    if (ioctl(fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	return 0;
     }
@@ -211,12 +278,14 @@ sifvjcomp(u, vjcomp, cidcomp)
 }
 
 /*
- * sifup - Config the interface up.
+ * sifup - Config the interface up and enable IP packets to pass.
  */
 int
 sifup(u)
 {
     struct ifreq ifr;
+    u_int x;
+
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
@@ -227,27 +296,51 @@ sifup(u)
 	syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
 	return 0;
     }
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	return 0;
+    }
+    x |= SC_ENABLE_IP;
+    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	return 0;
+    }
     return 1;
 }
 
 /*
- * sifdown - Config the interface down.
+ * sifdown - Config the interface down and disable IP.
  */
 int
 sifdown(u)
 {
     struct ifreq ifr;
+    u_int x;
+    int rv;
+
+    rv = 1;
+    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+	rv = 0;
+    } else {
+	x &= ~SC_ENABLE_IP;
+	if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	    syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+	    rv = 0;
+	}
+    }
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
-	return 0;
+	rv = 0;
-    }
+    } else {
 	ifr.ifr_flags &= ~IFF_UP;
 	if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 	    syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
-	return 0;
+	    rv = 0;
 	}
-    return 1;
+    }
+    return rv;
 }
 
 /*
@@ -481,11 +574,11 @@ get_ether_addr(ipaddr, hwaddr)
     return 0;
 }
 
+
 /*
  * ppp_available - check whether the system has any ppp interfaces
  * (in fact we check whether we can do an ioctl on ppp0).
  */
-
 int
 ppp_available()
 {

usr.sbin/pppd/upap.c

@@ -18,7 +18,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: upap.c,v 1.3 1993/11/10 01:34:35 paulus Exp $";
+static char rcsid[] = "$Id: upap.c,v 1.4 1994/05/08 12:16:32 paulus Exp $";
 #endif
 
 /*
@@ -310,7 +310,7 @@ upap_rauthreq(u, inp, id, len)
 	return;
     }
     GETCHAR(ruserlen, inp);
-    len -= sizeof (u_char) + ruserlen + sizeof (u_char);;
+    len -= sizeof (u_char) + ruserlen + sizeof (u_char);
     if (len < 0) {
 	UPAPDEBUG((LOG_INFO, "upap_rauth: rcvd short packet."));
 	return;
@@ -482,3 +482,80 @@ upap_sresp(u, code, id, msg, msglen)
 
     UPAPDEBUG((LOG_INFO, "upap_sresp: Sent code %d, id %d.", code, id));
 }
+
+/*
+ * upap_printpkt - print the contents of a PAP packet.
+ */
+char *upap_codenames[] = {
+    "AuthReq", "AuthAck", "AuthNak"
+};
+
+int
+upap_printpkt(p, plen, printer, arg)
+    u_char *p;
+    int plen;
+    void (*printer) __ARGS((void *, char *, ...));
+    void *arg;
+{
+    int code, id, len;
+    int mlen, ulen, wlen;
+    char *user, *pwd, *msg;
+    u_char *pstart;
+
+    if (plen < UPAP_HEADERLEN)
+	return 0;
+    pstart = p;
+    GETCHAR(code, p);
+    GETCHAR(id, p);
+    GETSHORT(len, p);
+    if (len < UPAP_HEADERLEN || len > plen)
+	return 0;
+
+    if (code >= 1 && code <= sizeof(upap_codenames) / sizeof(char *))
+	printer(arg, " %s", upap_codenames[code-1]);
+    else
+	printer(arg, " code=0x%x", code);
+    printer(arg, " id=0x%x", id);
+    len -= UPAP_HEADERLEN;
+    switch (code) {
+    case UPAP_AUTHREQ:
+	if (len < 1)
+	    break;
+	ulen = p[0];
+	if (len < ulen + 2)
+	    break;
+	wlen = p[ulen + 1];
+	if (len < ulen + wlen + 2)
+	    break;
+	user = (char *) (p + 1);
+	pwd = (char *) (p + ulen + 2);
+	p += ulen + wlen + 2;
+	len -= ulen + wlen + 2;
+	printer(arg, " user=");
+	print_string(user, ulen, printer, arg);
+	printer(arg, " password=");
+	print_string(pwd, wlen, printer, arg);
+	break;
+    case UPAP_AUTHACK:
+    case UPAP_AUTHNAK:
+	if (len < 1)
+	    break;
+	mlen = p[0];
+	if (len < mlen + 1)
+	    break;
+	msg = (char *) (p + 1);
+	p += mlen + 1;
+	len -= mlen + 1;
+	printer(arg, "msg=");
+	print_string(msg, mlen, printer, arg);
+	break;
+    }
+
+    /* print the rest of the bytes in the packet */
+    for (; len > 0; --len) {
+	GETCHAR(code, p);
+	printer(arg, " %.2x", code);
+    }
+
+    return p - pstart;
+}

usr.sbin/pppd/upap.h

@@ -16,7 +16,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: upap.h,v 1.3 1993/11/10 01:34:38 paulus Exp $
+ * $Id: upap.h,v 1.4 1994/05/08 12:16:34 paulus Exp $
  */
 
 /*
@@ -87,3 +87,5 @@ void upap_lowerup __ARGS((int));
 void upap_lowerdown __ARGS((int));
 void upap_input __ARGS((int, u_char *, int));
 void upap_protrej __ARGS((int));
+int  upap_printpkt __ARGS((u_char *, int,
+			   void (*) __ARGS((void *, char *, ...)), void *));