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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/pppd/cbcp.c	Lines:	0	147	0.0 %
Date:	2017-11-13	Branches:	0	72	0.0 %


/*	$OpenBSD: cbcp.c,v 1.8 2010/05/01 08:14:26 mk Exp $	*/

/*
 * cbcp - Call Back Configuration Protocol.
 *
 * Copyright (c) 1995 Pedro Roque Marques.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The name(s) of the authors of this software must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission.
 *
 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#include <syslog.h>

#include "pppd.h"
#include "cbcp.h"
#include "fsm.h"
#include "lcp.h"
#include "ipcp.h"

/*
 * Protocol entry points.
 */
static void cbcp_init(int unit);
static void cbcp_open(int unit);
static void cbcp_lowerup(int unit);
static void cbcp_input(int unit, u_char *pkt, int len);
static void cbcp_protrej(int unit);
static int  cbcp_printpkt(u_char *pkt, int len,
    void (*printer)(void *, char *, ...), void *arg);

struct protent cbcp_protent = {
    PPP_CBCP,
    cbcp_init,
    cbcp_input,
    cbcp_protrej,
    cbcp_lowerup,
    NULL,
    cbcp_open,
    NULL,
    cbcp_printpkt,
    NULL,
    0,
    "CBCP",
    NULL,
    NULL,
    NULL
};

cbcp_state cbcp[NUM_PPP];

/* internal prototypes */

static void cbcp_recvreq(cbcp_state *us, char *pckt, int len);
static void cbcp_resp(cbcp_state *us);
static void cbcp_up(cbcp_state *us);
static void cbcp_recvack(cbcp_state *us, char *pckt, int len);
static void cbcp_send(cbcp_state *us, u_char code, u_char *buf, int len);

/* init state */
static void
cbcp_init(iface)
    int iface;
{
    cbcp_state *us;

    us = &cbcp[iface];
    memset(us, 0, sizeof(cbcp_state));
    us->us_unit = iface;
    us->us_type |= (1 << CB_CONF_NO);
}

/* lower layer is up */
static void
cbcp_lowerup(iface)
    int iface;
{
    cbcp_state *us = &cbcp[iface];

    syslog(LOG_DEBUG, "cbcp_lowerup");
    syslog(LOG_DEBUG, "want: %d", us->us_type);

    if (us->us_type == CB_CONF_USER)
        syslog(LOG_DEBUG, "phone no: %s", us->us_number);
}

static void
cbcp_open(unit)
    int unit;
{
    syslog(LOG_DEBUG, "cbcp_open");
}

/* process an incoming packet */
static void
cbcp_input(unit, inpacket, pktlen)
    int unit;
    u_char *inpacket;
    int pktlen;
{
    u_char *inp;
    u_char code, id;
    u_short len;

    cbcp_state *us = &cbcp[unit];

    inp = inpacket;

    if (pktlen < CBCP_MINLEN) {
        syslog(LOG_ERR, "CBCP packet is too small");
	return;
    }

    GETCHAR(code, inp);
    GETCHAR(id, inp);
    GETSHORT(len, inp);

    if (len < CBCP_MINLEN || len > pktlen) {
        syslog(LOG_ERR, "CBCP packet: invalid length");
        return;
    }
    len -= CBCP_MINLEN;

    switch(code) {
    case CBCP_REQ:
        us->us_id = id;
	cbcp_recvreq(us, inp, len);
	break;

    case CBCP_RESP:
	syslog(LOG_DEBUG, "CBCP_RESP received");
	break;

    case CBCP_ACK:
	if (id != us->us_id)
	    syslog(LOG_DEBUG, "id doesn't match: expected %d recv %d",
		   us->us_id, id);

	cbcp_recvack(us, inp, len);
	break;

    default:
	break;
    }
}

/* protocol was rejected by foe */
void cbcp_protrej(int iface)
{
}

char *cbcp_codenames[] = {
    "Request", "Response", "Ack"
};

char *cbcp_optionnames[] = {
    "NoCallback",
    "UserDefined",
    "AdminDefined",
    "List"
};

/* pretty print a packet */
static int
cbcp_printpkt(p, plen, printer, arg)
    u_char *p;
    int plen;
    void (*printer)(void *, char *, ...);
    void *arg;
{
    int code, opt, id, len, olen, delay;
    u_char *pstart;

    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(cbcp_codenames) / sizeof(char *))
	printer(arg, " %s", cbcp_codenames[code-1]);
    else
	printer(arg, " code=0x%x", code);

    printer(arg, " id=0x%x", id);
    len -= HEADERLEN;

    switch (code) {
    case CBCP_REQ:
    case CBCP_RESP:
    case CBCP_ACK:
        while(len >= 2) {
	    GETCHAR(opt, p);
	    GETCHAR(olen, p);

	    if (olen < 2 || olen > len) {
	        break;
	    }

	    printer(arg, " <");
	    len -= olen;

	    if (opt >= 1 && opt <= sizeof(cbcp_optionnames) / sizeof(char *))
	    	printer(arg, " %s", cbcp_optionnames[opt-1]);
	    else
	        printer(arg, " option=0x%x", opt);

	    if (olen > 2) {
	        GETCHAR(delay, p);
		printer(arg, " delay = %d", delay);
	    }

	    if (olen > 3) {
	        int addrt;
		char str[256];

		GETCHAR(addrt, p);
		memcpy(str, p, olen - 4);
		str[olen - 4] = 0;
		printer(arg, " number = %s", str);
	    }
	    printer(arg, ">");
	    break;
	}

    default:
	break;
    }

    for (; len > 0; --len) {
	GETCHAR(code, p);
	printer(arg, " %.2x", code);
    }

    return p - pstart;
}

/* received CBCP request */
static void
cbcp_recvreq(us, pckt, pcktlen)
    cbcp_state *us;
    char *pckt;
    int pcktlen;
{
    u_char type, opt_len, delay, addr_type;
    char address[256];
    int len = pcktlen;

    address[0] = 0;

    while (len > 1) {
        syslog(LOG_DEBUG, "length: %d", len);

	GETCHAR(type, pckt);
	GETCHAR(opt_len, pckt);

	if (len < opt_len)
	    break;
	len -= opt_len;

	if (opt_len > 2)
	    GETCHAR(delay, pckt);

	us->us_allowed |= (1 << type);

	switch(type) {
	case CB_CONF_NO:
	    syslog(LOG_DEBUG, "no callback allowed");
	    break;

	case CB_CONF_USER:
	    syslog(LOG_DEBUG, "user callback allowed");
	    if (opt_len > 4) {
	        GETCHAR(addr_type, pckt);
		memcpy(address, pckt, opt_len - 4);
		address[opt_len - 4] = 0;
		if (address[0])
		    syslog(LOG_DEBUG, "address: %s", address);
	    }
	    break;

	case CB_CONF_ADMIN:
	    syslog(LOG_DEBUG, "user admin defined allowed");
	    break;

	case CB_CONF_LIST:
	    break;
	}
    }

    cbcp_resp(us);
}

static void
cbcp_resp(us)
    cbcp_state *us;
{
    u_char cb_type;
    u_char buf[256];
    u_char *bufp = buf;
    int len = 0;

    cb_type = us->us_allowed & us->us_type;
    syslog(LOG_DEBUG, "cbcp_resp cb_type=%d", cb_type);

#if 0
    if (!cb_type)
        lcp_down(us->us_unit);
#endif

    if (cb_type & ( 1 << CB_CONF_USER ) ) {
	syslog(LOG_DEBUG, "cbcp_resp CONF_USER");
	PUTCHAR(CB_CONF_USER, bufp);
	len = 3 + 1 + strlen(us->us_number) + 1;
	PUTCHAR(len , bufp);
	PUTCHAR(5, bufp); /* delay */
	PUTCHAR(1, bufp);
	BCOPY(us->us_number, bufp, strlen(us->us_number) + 1);
	cbcp_send(us, CBCP_RESP, buf, len);
	return;
    }

    if (cb_type & ( 1 << CB_CONF_ADMIN ) ) {
	syslog(LOG_DEBUG, "cbcp_resp CONF_ADMIN");
        PUTCHAR(CB_CONF_ADMIN, bufp);
	len = 3 + 1;
	PUTCHAR(len , bufp);
	PUTCHAR(5, bufp); /* delay */
	PUTCHAR(0, bufp);
	cbcp_send(us, CBCP_RESP, buf, len);
	return;
    }

    if (cb_type & ( 1 << CB_CONF_NO ) ) {
        syslog(LOG_DEBUG, "cbcp_resp CONF_NO");
	PUTCHAR(CB_CONF_NO, bufp);
	len = 3;
	PUTCHAR(len , bufp);
	PUTCHAR(0, bufp);
	cbcp_send(us, CBCP_RESP, buf, len);
	(*ipcp_protent.open)(us->us_unit);
	return;
    }
}

static void
cbcp_send(us, code, buf, len)
    cbcp_state *us;
    u_char code;
    u_char *buf;
    int len;
{
    u_char *outp;
    int outlen;

    outp = outpacket_buf;

    outlen = 4 + len;

    MAKEHEADER(outp, PPP_CBCP);

    PUTCHAR(code, outp);
    PUTCHAR(us->us_id, outp);
    PUTSHORT(outlen, outp);

    if (len)
        BCOPY(buf, outp, len);

    output(us->us_unit, outpacket_buf, outlen + PPP_HDRLEN);
}

static void
cbcp_recvack(us, pckt, len)
    cbcp_state *us;
    char *pckt;
    int len;
{
    u_char type, delay, addr_type;
    int opt_len;
    char address[256];

    if (len > 1) {
        GETCHAR(type, pckt);
	GETCHAR(opt_len, pckt);

	if (opt_len > len)
	    return;

	if (opt_len > 2)
	    GETCHAR(delay, pckt);

	if (opt_len > 4) {
	    GETCHAR(addr_type, pckt);
	    memcpy(address, pckt, opt_len - 4);
	    address[opt_len - 4] = 0;
	    if (address[0])
	        syslog(LOG_DEBUG, "peer will call: %s", address);
	}
    }

    cbcp_up(us);
}

extern int persist;

/* ok peer will do callback */
static void
cbcp_up(us)
    cbcp_state *us;
{
    persist = 0;
    lcp_close(0, "Call me back, please");
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cbcp.c,v 1.8 2010/05/01 08:14:26 mk Exp $ */
2
3			/*
4			* cbcp - Call Back Configuration Protocol.
5			*
6			* Copyright (c) 1995 Pedro Roque Marques. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. The name(s) of the authors of this software must not be used to
21			* endorse or promote products derived from this software without
22			* prior written permission.
23			*
24			* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
25			* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
26			* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
27			* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
28			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
29			* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
30			* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
31			*/
32
33			#include <stdio.h>
34			#include <string.h>
35			#include <sys/types.h>
36			#include <sys/time.h>
37			#include <syslog.h>
38
39			#include "pppd.h"
40			#include "cbcp.h"
41			#include "fsm.h"
42			#include "lcp.h"
43			#include "ipcp.h"
44
45			/*
46			* Protocol entry points.
47			*/
48			static void cbcp_init(int unit);
49			static void cbcp_open(int unit);
50			static void cbcp_lowerup(int unit);
51			static void cbcp_input(int unit, u_char *pkt, int len);
52			static void cbcp_protrej(int unit);
53			static int cbcp_printpkt(u_char *pkt, int len,
54			void (printer)(void , char , ...), void arg);
55
56			struct protent cbcp_protent = {
57			PPP_CBCP,
58			cbcp_init,
59			cbcp_input,
60			cbcp_protrej,
61			cbcp_lowerup,
62			NULL,
63			cbcp_open,
64			NULL,
65			cbcp_printpkt,
66			NULL,
67			0,
68			"CBCP",
69			NULL,
70			NULL,
71			NULL
72			};
73
74			cbcp_state cbcp[NUM_PPP];
75
76			/* internal prototypes */
77
78			static void cbcp_recvreq(cbcp_state us, char pckt, int len);
79			static void cbcp_resp(cbcp_state *us);
80			static void cbcp_up(cbcp_state *us);
81			static void cbcp_recvack(cbcp_state us, char pckt, int len);
82			static void cbcp_send(cbcp_state us, u_char code, u_char buf, int len);
83
84			/* init state */
85			static void
86			cbcp_init(iface)
87			int iface;
88			{
89			cbcp_state *us;
90
91			us = &cbcp[iface];
92			memset(us, 0, sizeof(cbcp_state));
93			us->us_unit = iface;
94			us->us_type \|= (1 << CB_CONF_NO);
95			}
96
97			/* lower layer is up */
98			static void
99			cbcp_lowerup(iface)
100			int iface;
101			{
102			cbcp_state *us = &cbcp[iface];
103
104			syslog(LOG_DEBUG, "cbcp_lowerup");
105			syslog(LOG_DEBUG, "want: %d", us->us_type);
106
107			if (us->us_type == CB_CONF_USER)
108			syslog(LOG_DEBUG, "phone no: %s", us->us_number);
109			}
110
111			static void
112			cbcp_open(unit)
113			int unit;
114			{
115			syslog(LOG_DEBUG, "cbcp_open");
116			}
117
118			/* process an incoming packet */
119			static void
120			cbcp_input(unit, inpacket, pktlen)
121			int unit;
122			u_char *inpacket;
123			int pktlen;
124			{
125			u_char *inp;
126			u_char code, id;
127			u_short len;
128
129			cbcp_state *us = &cbcp[unit];
130
131			inp = inpacket;
132
133			if (pktlen < CBCP_MINLEN) {
134			syslog(LOG_ERR, "CBCP packet is too small");
135			return;
136			}
137
138			GETCHAR(code, inp);
139			GETCHAR(id, inp);
140			GETSHORT(len, inp);
141
142			if (len < CBCP_MINLEN \|\| len > pktlen) {
143			syslog(LOG_ERR, "CBCP packet: invalid length");
144			return;
145			}
146			len -= CBCP_MINLEN;
147
148			switch(code) {
149			case CBCP_REQ:
150			us->us_id = id;
151			cbcp_recvreq(us, inp, len);
152			break;
153
154			case CBCP_RESP:
155			syslog(LOG_DEBUG, "CBCP_RESP received");
156			break;
157
158			case CBCP_ACK:
159			if (id != us->us_id)
160			syslog(LOG_DEBUG, "id doesn't match: expected %d recv %d",
161			us->us_id, id);
162
163			cbcp_recvack(us, inp, len);
164			break;
165
166			default:
167			break;
168			}
169			}
170
171			/* protocol was rejected by foe */
172			void cbcp_protrej(int iface)
173			{
174			}
175
176			char *cbcp_codenames[] = {
177			"Request", "Response", "Ack"
178			};
179
180			char *cbcp_optionnames[] = {
181			"NoCallback",
182			"UserDefined",
183			"AdminDefined",
184			"List"
185			};
186
187			/* pretty print a packet */
188			static int
189			cbcp_printpkt(p, plen, printer, arg)
190			u_char *p;
191			int plen;
192			void (printer)(void , char *, ...);
193			void *arg;
194			{
195			int code, opt, id, len, olen, delay;
196			u_char *pstart;
197
198			if (plen < HEADERLEN)
199			return 0;
200			pstart = p;
201			GETCHAR(code, p);
202			GETCHAR(id, p);
203			GETSHORT(len, p);
204			if (len < HEADERLEN \|\| len > plen)
205			return 0;
206
207			if (code >= 1 && code <= sizeof(cbcp_codenames) / sizeof(char *))
208			printer(arg, " %s", cbcp_codenames[code-1]);
209			else
210			printer(arg, " code=0x%x", code);
211
212			printer(arg, " id=0x%x", id);
213			len -= HEADERLEN;
214
215			switch (code) {
216			case CBCP_REQ:
217			case CBCP_RESP:
218			case CBCP_ACK:
219			while(len >= 2) {
220			GETCHAR(opt, p);
221			GETCHAR(olen, p);
222
223			if (olen < 2 \|\| olen > len) {
224			break;
225			}
226
227			printer(arg, " <");
228			len -= olen;
229
230			if (opt >= 1 && opt <= sizeof(cbcp_optionnames) / sizeof(char *))
231			printer(arg, " %s", cbcp_optionnames[opt-1]);
232			else
233			printer(arg, " option=0x%x", opt);
234
235			if (olen > 2) {
236			GETCHAR(delay, p);
237			printer(arg, " delay = %d", delay);
238			}
239
240			if (olen > 3) {
241			int addrt;
242			char str[256];
243
244			GETCHAR(addrt, p);
245			memcpy(str, p, olen - 4);
246			str[olen - 4] = 0;
247			printer(arg, " number = %s", str);
248			}
249			printer(arg, ">");
250			break;
251			}
252
253			default:
254			break;
255			}
256
257			for (; len > 0; --len) {
258			GETCHAR(code, p);
259			printer(arg, " %.2x", code);
260			}
261
262			return p - pstart;
263			}
264
265			/* received CBCP request */
266			static void
267			cbcp_recvreq(us, pckt, pcktlen)
268			cbcp_state *us;
269			char *pckt;
270			int pcktlen;
271			{
272			u_char type, opt_len, delay, addr_type;
273			char address[256];
274			int len = pcktlen;
275
276			address[0] = 0;
277
278			while (len > 1) {
279			syslog(LOG_DEBUG, "length: %d", len);
280
281			GETCHAR(type, pckt);
282			GETCHAR(opt_len, pckt);
283
284			if (len < opt_len)
285			break;
286			len -= opt_len;
287
288			if (opt_len > 2)
289			GETCHAR(delay, pckt);
290
291			us->us_allowed \|= (1 << type);
292
293			switch(type) {
294			case CB_CONF_NO:
295			syslog(LOG_DEBUG, "no callback allowed");
296			break;
297
298			case CB_CONF_USER:
299			syslog(LOG_DEBUG, "user callback allowed");
300			if (opt_len > 4) {
301			GETCHAR(addr_type, pckt);
302			memcpy(address, pckt, opt_len - 4);
303			address[opt_len - 4] = 0;
304			if (address[0])
305			syslog(LOG_DEBUG, "address: %s", address);
306			}
307			break;
308
309			case CB_CONF_ADMIN:
310			syslog(LOG_DEBUG, "user admin defined allowed");
311			break;
312
313			case CB_CONF_LIST:
314			break;
315			}
316			}
317
318			cbcp_resp(us);
319			}
320
321			static void
322			cbcp_resp(us)
323			cbcp_state *us;
324			{
325			u_char cb_type;
326			u_char buf[256];
327			u_char *bufp = buf;
328			int len = 0;
329
330			cb_type = us->us_allowed & us->us_type;
331			syslog(LOG_DEBUG, "cbcp_resp cb_type=%d", cb_type);
332
333			#if 0
334			if (!cb_type)
335			lcp_down(us->us_unit);
336			#endif
337
338			if (cb_type & ( 1 << CB_CONF_USER ) ) {
339			syslog(LOG_DEBUG, "cbcp_resp CONF_USER");
340			PUTCHAR(CB_CONF_USER, bufp);
341			len = 3 + 1 + strlen(us->us_number) + 1;
342			PUTCHAR(len , bufp);
343			PUTCHAR(5, bufp); /* delay */
344			PUTCHAR(1, bufp);
345			BCOPY(us->us_number, bufp, strlen(us->us_number) + 1);
346			cbcp_send(us, CBCP_RESP, buf, len);
347			return;
348			}
349
350			if (cb_type & ( 1 << CB_CONF_ADMIN ) ) {
351			syslog(LOG_DEBUG, "cbcp_resp CONF_ADMIN");
352			PUTCHAR(CB_CONF_ADMIN, bufp);
353			len = 3 + 1;
354			PUTCHAR(len , bufp);
355			PUTCHAR(5, bufp); /* delay */
356			PUTCHAR(0, bufp);
357			cbcp_send(us, CBCP_RESP, buf, len);
358			return;
359			}
360
361			if (cb_type & ( 1 << CB_CONF_NO ) ) {
362			syslog(LOG_DEBUG, "cbcp_resp CONF_NO");
363			PUTCHAR(CB_CONF_NO, bufp);
364			len = 3;
365			PUTCHAR(len , bufp);
366			PUTCHAR(0, bufp);
367			cbcp_send(us, CBCP_RESP, buf, len);
368			(*ipcp_protent.open)(us->us_unit);
369			return;
370			}
371			}
372
373			static void
374			cbcp_send(us, code, buf, len)
375			cbcp_state *us;
376			u_char code;
377			u_char *buf;
378			int len;
379			{
380			u_char *outp;
381			int outlen;
382
383			outp = outpacket_buf;
384
385			outlen = 4 + len;
386
387			MAKEHEADER(outp, PPP_CBCP);
388
389			PUTCHAR(code, outp);
390			PUTCHAR(us->us_id, outp);
391			PUTSHORT(outlen, outp);
392
393			if (len)
394			BCOPY(buf, outp, len);
395
396			output(us->us_unit, outpacket_buf, outlen + PPP_HDRLEN);
397			}
398
399			static void
400			cbcp_recvack(us, pckt, len)
401			cbcp_state *us;
402			char *pckt;
403			int len;
404			{
405			u_char type, delay, addr_type;
406			int opt_len;
407			char address[256];
408
409			if (len > 1) {
410			GETCHAR(type, pckt);
411			GETCHAR(opt_len, pckt);
412
413			if (opt_len > len)
414			return;
415
416			if (opt_len > 2)
417			GETCHAR(delay, pckt);
418
419			if (opt_len > 4) {
420			GETCHAR(addr_type, pckt);
421			memcpy(address, pckt, opt_len - 4);
422			address[opt_len - 4] = 0;
423			if (address[0])
424			syslog(LOG_DEBUG, "peer will call: %s", address);
425			}
426			}
427
428			cbcp_up(us);
429			}
430
431			extern int persist;
432
433			/* ok peer will do callback */
434			static void
435			cbcp_up(us)
436			cbcp_state *us;
437			{
438			persist = 0;
439			lcp_close(0, "Call me back, please");
440			}