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ckudia.c
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#ifndef NOCKUDIA
char *dialv = " Dialer, 4G(060)";
/* C K U D I A -- Dialing program for connection to remote system */
/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright (c) 2021, 2022, 2023 Jeffrey H. Johnson <[email protected]>
*
* Copyright (c) 1985, Herman Fischer, Encino CA
*
* Copyright (c) 1981-2011,
* Trustees of Columbia University in the City of New York.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of Columbia University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This module should work under all versions of UNIX. It calls externally
* defined system-depended functions for i/o, but depends upon the existence
* of various modem control functions.
*
* This module, and the supporting routines in the ckutio.c module, assume
* that the computer and modem properly utilize the following data communi-
* cations signals (that means one should prepare the modem to use, not
* circumvent, these signals):
*
* Data Terminal Ready: This signal is asserted by the computer when
* Kermit is about to ask the modem to dial a call, and is removed
* when Kermit wishes to have the modem hang up a call. The signal
* is asserted both while Kermit is asking the modem to dial a
* specific number, and after connection, while Kermit is in a data
* exchange mode.
*
* Carrier detect: This signal must be asserted by the modem when a
* carrier is detected from a remote modem on a communications
* circuit. It must be removed by the modem when the circuit
* disconnects or is hung up. (Carrier detect is ignored while
* Kermit is asking the modem to dial the call, because there is
* no consistant usage of this signal during the dialing phase
* among different modem manufacturers.)
*/
/*
* To add support for another modem, do the following:
*
* Define a modem number symbol (n_XXX) for it, keeping the
* list in alphabetical and numerical order, and renumbering
* the values as necessary.
*
* Create a MDMINF structure for it, again keeping the list
* alphabetical for sanity's sake.
*
* Add the address of the MDMINF structure to the ptrtab
* array, again in alphabetical and numerical order.
*
* Add the "user visible" modem name and corresponding modem
* number to the mdmtab array, again in alphabetical order.
*
* Read through the code and add modem-specific sections,
* as necessary.
*/
/*
* The intent of the "unknown" modem is, hopefully, to allow KERMIT
* to support unknown modems by having the user type the entire
* autodial sequence (possibly including control characters, etc.)
* as the "phone number". The only reason that the CONNECT command
* cannot be used to do this is that a remote line cannot normally
* be opened unless carrier is present.
*
* The protocol and other characteristics of this modem are unknown,
* with some "reasonable" values being chosen for some of them. The
* only way to detect if a connection is made is to look for carrier
* present.
*
* SUPPORT IS CURRENTLY ONLY PARTIALLY SKETCHED OUT FOR THIS.
* ALSO, IT SHOULD PERHAPS BE HANDLED MUCH EARLIER, SIMPLY READING
* USER INPUT AND SENDING IT TO THE MODEM AND ECHOING MODEM RESPONSES
* BACK TO THE USER, ALL THE TIME LOOKING FOR CARRIER. OF COURSE, THE
* PROBLEM THEN BECOMES ONE OF ALLOWING THE USER TO CANCEL THE DIALING.
* WE COULD CHOOSE SOME PHRASE THAT WOULD PRESUMABLY NEVER BE A PART
* OF A VALID AUTODIAL SEQUENCE (E.G., "QUIT" and "quit").
*/
#include "ckcdeb.h"
#include "ckcker.h"
#include "ckucmd.h"
#include <ctype.h>
#include <signal.h>
#include <stdio.h>
#include <setjmp.h>
#ifdef __linux__
#include <string.h>
#endif /* ifdef __linux__ */
void xcpy(char *to, char *from, unsigned int len);
extern int flow, local, mdmtyp, quiet, speed, parity, seslog, ttyfd;
extern char ttname[], sesfil[];
#define MDMINF struct mdminf
MDMINF /* structure for modem-specific information */
{
int dial_time; /* time modem allows for dialing (secs) */
char *pause_chars; /* character(s) to tell modem to pause */
int pause_time; /* time associated with pause chars (secs) */
char *wake_str; /* string to wakeup modem & put in cmd mode */
int wake_rate; /* delay between wake_str characters (msecs) */
char *wake_prompt; /* string prompt after wake_str */
char *dmode_str; /* string to put modem in dialing mode */
char *dmode_prompt; /* string prompt for dialing mode */
char *dial_str; /* dialing string, with "%s" for number */
int dial_rate; /* delay between dialing characters (msecs) */
};
/*
* Define symbolic modem numbers.
*
* The numbers MUST correspond to the ordering of entries
* within the ptrtab array, and start at one (1).
*
* It is assumed that there are relatively few of these
* values, and that the high(er) bytes of the value may
* be used for modem-specific mode information.
*
* REMEMBER that only the first eight characters of these
* names are guaranteed to be unique.
*/
#define n_ATTDTDM 1
#define n_ATTMODEM 2
#define n_CERMETEK 3
#define n_DF03 4
#define n_DF100 5
#define n_DF200 6
#define n_GDC 7
#define n_HAYES 8
#define n_PENRIL 9
#define n_RACAL 10
#define n_UNKNOWN 11
#define n_USROBOT 12
#define n_VENTEL 13
#define n_CONCORD 14
#define n_ATTUPC 15 /* aka UNIX PC and ATT7300 */
#define n_ROLM 16 /* Rolm CBX */
#define n_MICROCOM 17
/*
* Declare modem "variant" numbers for any of the above for
* which it is necessary to note various operational modes,
* using the second byte of a modem number.
*
* It is assumed that such modem modes share the same modem-
* specific information (see MDMINF structure) but may differ
* in some of the actions that are performed.
*/
#define n_HAYESNV ( n_HAYES + ( 1 << 8 ))
/*
* Declare structures containing modem-specific information.
*
* REMEMBER that only the first SEVEN characters of these
* names are guaranteed to be unique.
*/
static MDMINF ATTMODEM = /* Information for AT&T switched-network modems */
/* "Number" following "dial" can include: p's and
* t's to indicate pulse or tone (default) dialing,
* + for wait for dial tone, , for pause, r for
* last number dialed, and, except for 2224B, some
* comma-delimited options like o12=y before number.
*/
/* "Important" options for the modems:
*
* All: Except for 2224B, enable option 12 for "transparent
* data," o12=y. If a computer port used for both
* incoming and outgoing calls is connected to the
* modem, disable "enter interactive mode on carriage
* return," EICR. The Kermit "dial" command can
* function with EIA leads standard, EIAS.
*
* 2212C: Internal hardware switches at their default
* positions (four rockers down away from numbers)
* unless EICR is not wanted (rocker down at the 4).
* For EIAS, rocker down at the 1.
*
* 2224B: Front-panel switch position 1 must be up (at the 1,
* closed). Disable EICR with position 2 down.
* For EIAS, position 4 down.
* All switches on the back panel down.
*
* 2224CEO: All front-panel switches down except either 5 or 6.
* Enable interactive flow control with o16=y.
* Select normal asynchronous mode with o34=0 (zero).
* Disable EICR with position 3 up. For EIAS, 1 up.
* Reset the modem after changing switches.
*
* 2296A: If option 00 (zeros) is present, use o00=0.
* Enable interactive flow control with o16=y.
* Select normal asynchronous mode with o34=0 (zero).
* Enable modem-port flow control (if available) with
* o42=y. Enable asynchronous operation with o50=y.
* Disable EICR with o69=n. For EIAS, o66=n, using
* front panel.
*/
{
20, /* dial_time */
",", /* pause_chars */
2, /* pause_time */
"+", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
"", /* dmode_prompt */
"at%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF ATTDTDM = /* Information for AT&T Digital Terminal Data Module
* For dialing: KYBD switch down, others usually up.
*/
{
5, /* dial_time */
"", /* pause_chars */
0, /* pause_time */
"", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
"", /* dmode_prompt */
"%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF CERMETEK = /* Information for Cermetek Info-Mate 212A modem */
{
20, /* dial_time */
"BbPpTt", /* pause_chars */
0, /* pause_time */
" XY\016R\r", /* wake_str */
200, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"\016D '%s'\r", /* dial_str */
200 /* dial_rate */
};
static MDMINF DF03 = /* Information for "DEC DF03-AC" modem */
{
27, /* dial_time */
"=", /* pause_chars */
15, /* pause_time */
"\001\002", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"%s", /* dial_str */
0 /* dial_rate */
};
static MDMINF DF100 = /* Information for "DEC DF100-series" modem */
/*
* The phone "number" can include "P"s and/or "T"s
* within it to indicate that subsequent digits are
* to be dialed using pulse or tone dialing. The
* modem defaults to pulse dialing. You may modify
* the dial string below to explicitly default all
* dialing to pulse or tone, but doing so prevents
* the use of phone numbers that you may have stored
* in the modem's memory.
*/
{
30, /* dial_time */
"=", /* pause_chars */
15, /* pause_time */
"\001", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"%s#", /* dial_str */
0 /* dial_rate */
};
static MDMINF DF200 = /* Information for "DEC DF200-series" modem */
/*
* The phone "number" can include "P"s and/or "T"s
* within it to indicate that subsequent digits are
* to be dialed using pulse or tone dialing. The
* modem defaults to pulse dialing. You may modify
* the dial string below to explicitly default all
* dialing to pulse or tone, but doing so prevents
* the use of phone numbers that you may have stored
* in the modem's memory.
*/
{
30, /* dial_time */
"=W", /* pause_chars */
15, /* pause_time */
"\002", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"%s!", /* dial_str */
0 /* dial_rate */
};
static MDMINF GDC = /* Information for GeneralDataComm 212A/ED modem */
{
32, /* dial_time */
"%", /* pause_chars */
3, /* pause_time */
"\r\r", /* wake_str */
500, /* wake_rate */
"$", /* wake_prompt */
"D\r", /* dmode_str */
":", /* dmode_prompt */
"T%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF HAYES = /* Information for "Hayes" modem */
{
35, /* dial_time */
",", /* pause_chars */
2, /* pause_time */
"AT\r", /* wake_str */
/* Note: Other wake_str's are possible here.
* For Hayes 2400 that is to be used for both
* inbound and outbound calls, "AT&F&D3" might
* be best. For outbound calls only, possibly
* "AT&F&D2". See the Hayes 2400 manual.
*/
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
"", /* dmode_prompt */
"ATD%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF PENRIL = /* Information for "Penril" modem */
{
50, /* dial_time */
"", /* pause_chars */
0, /* pause_time */
"\r\r", /* wake_str */
300, /* wake_rate */
">", /* wake_prompt */
"k\r", /* dmode_str */
":", /* dmode_prompt */
"%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF RACAL = /* Information for "Racal Vadic" modem */
{
35, /* dial_time */
"Kk", /* pause_chars */
5, /* pause_time */
"\005\r", /* wake_str */
50, /* wake_rate */
"*", /* wake_prompt */
"D\r", /* dmode_str */
"?", /* dmode_prompt */
"%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF UNKNOWN = /* Information for "Unknown" modem */
{
30, /* dial_time */
"", /* pause_chars */
0, /* pause_time */
"", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF USROBOT = /* Information for "US Robotics 212A" modem */
{
30, /* dial_time */
",", /* pause_chars */
2, /* pause_time */
"ATS2=01\r", /* wake_str */
0, /* wake_rate */
"OK\r", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"ATTD%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF VENTEL = /* Information for "Ventel" modem */
{
20, /* dial_time */
"%", /* pause_chars */
5, /* pause_time */
"\r\r\r", /* wake_str */
300, /* wake_rate */
"$", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"<K%s\r>", /* dial_str */
0 /* dial_rate */
};
static MDMINF CONCORD = /* Information for Condor CDS 220 2400b modem */
{
35, /* dial_time */
",", /* pause_chars */
2, /* pause_time */
"\r\r", /* wake_str */
20, /* wake_rate */
"CDS >", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"<D M%s\r>", /* dial_str */
0 /* dial_rate */
};
static MDMINF
ATTUPC = /* (Dummy) Information for "ATT7300/UNIX PC" internal modem */
{
20, /* dial_time */
"", /* pause_chars */
0, /* pause_time */
"", /* wake_str */
0, /* wake_rate */
"", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"%s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF ROLM = /* IBM / Siemens / Rolm 8000, 9000, 9751 CBX */
{
60, /* dial_time */
"", /* pause_chars */
0, /* pause_time */
"\r\r", /* wake_str */
5, /* wake_rate */
"MODIFY?", /* wake_prompt */
"", /* dmode_str */
"", /* dmode_prompt */
"CALL %s\r", /* dial_str */
0 /* dial_rate */
};
static MDMINF MICROCOM = /* Information for Microcom modems; native mode */
/* (Long answer only) */
{
35, /* dial_time */
",!@", /* pause_chars */
3, /* pause_time */
"\r", /* wake_str */
100, /* wake_rate */
"!", /* wake_prompt */
"", /* dmode_str */
NULL, /* dmode_prompt */
"d%s\r", /* dial_str */
0 /* dial_rate */
};
/*
* Declare table for converting modem numbers to
* information pointers.
*
* The entries MUST be in ascending order by modem
* number, without any "gaps" in the numbers, and
* starting from one (1).
*
* This table should NOT include entries for the
* "variant" modem numbers, since it is assumed that
* they share the same information as the normal value.
*/
static MDMINF *ptrtab[] = {
&ATTDTDM, &ATTMODEM, &CERMETEK, &DF03, &DF100, &DF200,
&GDC, &HAYES, &PENRIL, &RACAL, &UNKNOWN, &USROBOT,
&VENTEL, &CONCORD, &ATTUPC, /* ATT7300 */
&ROLM, /* Rolm CBX */
&MICROCOM,
};
/*
* Declare modem names and associated numbers for command
* parsing, and also for doing number-to-name translation.
*/
/*
* The entries MUST be in alphabetical order by modem name.
*/
struct keytab mdmtab[] = {
{ "attdtdm", n_ATTDTDM, 0, },
{ "attmodem", n_ATTMODEM, 0, },
{ "att7300", n_ATTUPC, 0, },
{ "cermetek", n_CERMETEK, 0, },
{ "concord", n_CONCORD, 0, },
{ "df03-ac", n_DF03, 0, },
{ "df100-series", n_DF100, 0, },
{ "df200-series", n_DF200, 0, },
{ "direct", 0, 0, },
{ "gendatacomm", n_GDC, 0, },
{ "hayes", n_HAYES, 0, },
{ "microcom", n_MICROCOM, 0, },
{ "penril", n_PENRIL, 0, },
{ "racalvadic", n_RACAL, 0, },
{ "rolm", n_ROLM, 0, },
{ "unknown", n_UNKNOWN, 0, },
{ "usrobotics-212a", n_USROBOT, 0, },
{ "ventel", n_VENTEL, 0 }
};
int nmdm = ( sizeof ( mdmtab ) / \
sizeof ( struct keytab )); /* number of modems */
#define DIALING 4 /* for ttpkt parameter */
#define CONNECT 5
#define CONNECTED 1 /* for completion status */
#define FAILED 2
/*
* Failure reasons for use
* with the 'longjmp' exit.
*/
#define F_time 1 /* timeout */
#define F_int 2 /* interrupt */
#define F_modem 3 /* modem-detected failure */
#define F_minit 4 /* cannot initialize modem */
static char *F_reason[5] = { /* Failure reasons for message */
"Unknown",
"Timeout",
"Interrupt",
"Modem",
"Initialize"
};
static int tries = 0;
#ifdef MINBUF
#define LBUFL 48
#else /* ifdef MINBUF */
#define LBUFL 100
#endif /* ifdef MINBUF */
static char lbuf[LBUFL];
static jmp_buf sjbuf;
static SIGTYP (*savAlrm)(); /* for saving alarm handler */
static SIGTYP (*savInt)(); /* for saving interrupt handler */
void /* Copy a string of the */
xcpy(to, from, len) /* the given length. */
register char *to, *from;
register unsigned len;
{
while (len--)
{
*to++ = *from++;
}
}
SIGTYP
dialtime() /* timer interrupt handler */
{
longjmp(sjbuf, F_time);
}
SIGTYP
dialint() /* user-interrupt handler */
{
longjmp(sjbuf, F_int);
}
static int
ttolSlow(s, millisec)
char *s;
int millisec;
{ /* Output s-l-o-w-l-y */
for (; *s; s++)
{
ttoc(*s);
msleep(millisec);
}
return ( 0 );
}
/*
* Wait for a string of characters.
*
* The characters are waited for individually,
* and other characters may be received "in-
* between". This merely guarantees that the
* characters ARE received, and in the order
* specified.
*/
static int
waitFor(s)
char *s;
{
CHAR c;
while (( c = *s++ )) /* while more characters remain... */
{
while ((( ttinc(0) & \
0177 ) != c )) /* wait for the character */
{
;
}
}
return ( 0 );
}
static int
didWeGet(s, r)
char *s, *r;
{ /* Looks in string s for response r */
int lr = strlen(r); /* 0 means not found, 1 means found */
int i;
debug(F110, "didWeGet", r, 0);
debug(F110, " in", s, 0);
for (i = strlen(s) - lr; i >= 0; i--)
{
if (s[i] == r[0])
{
if (!strncmp(s + i, r, lr))
{
return ( 1 );
}
}
}
return ( 0 );
}
/* R E S E T -- Reset alarms, etc. on exit */
static int
reset()
{
alarm(0);
signal(SIGALRM, savAlrm); /* restore alarm handler */
signal(SIGINT, savInt); /* restore interrupt handler */
return ( 0 );
}
/* C K D I A L -- Dial up the remote system */
int
ckdial(telnbr)
char *telnbr;
{
char c;
char *i, *j;
int waitct = 0; /* XXX(jhj): waitct = 0 init */
int status = 0; /* XXX(jhj): status = 0 init */
char errmsg[50], *erp;
MDMINF *pmdminf; /* pointer to modem-specific info */
int augmdmtyp; /* augmented modem type, handle modem modes */
int mdmEcho = 0; /* assume modem does not echo */
int n, n1;
char *pc; /* pointer to a character */
if (!mdmtyp)
{
printf("'set modem' first\n");
return ( -2 );
}
if (!local)
{
printf("'set line' first\n");
return ( -2 );
}
if (speed < 0)
{
printf("'set speed' first\n");
return ( -2 );
}
debug(F110, "dial", telnbr, 0);
/*
* Carrier no-wait can
* be invalidated
*/
if (ttopen(
ttname, &local, mdmtyp) < 0) /* Open, no carrier wait */
{
erp = errmsg;
sprintf(erp, "Can't open %s", ttname);
perror(errmsg);
return ( -2 );
}
pmdminf = ptrtab[mdmtyp - 1]; /* Set pointer to modem info */
augmdmtyp = mdmtyp; /* Init augmented modem type */
/*
* interdigit waits
* for tone dial
*/
waitct = 1 * strlen(telnbr); /* compute time to dial worst case */
waitct += pmdminf->dial_time; /* dialtone + completion wait times */
for (i = telnbr; *i; i++) /* add in pause characters time */
{
for (j = pmdminf->pause_chars; *j; j++)
{
if (*i == *j)
{
waitct += pmdminf->pause_time;
break;
}
}
}
printf("Dialing thru %s, speed %d, number %s.\n", ttname, speed, telnbr);
printf("The timeout for completing the call is %d seconds.\n", waitct);
printf("Type the interrupt character (^C) to cancel the dialing.\n");
debug(F101, ttname, "", speed);
debug(F101, "timeout", "", waitct);
/*
* Hang up the modem
* (in case it wasn't "on hook")
*/
if (tthang() < 0)
{
printf("Can't hang up tty line\n");
return ( -2 );
}
if (augmdmtyp == n_ROLM)
{
sleep(1);
}
/*
* Condition console terminal and communication line;
* place line into "clocal" dialing state.
*/
if (ttpkt(speed, DIALING, parity) < 0)
{
printf("Can't condition line\n");
return ( -2 );
}
if (augmdmtyp == n_ROLM)
{
sleep(1);
}
/*
* Establish jump vector,
* or handle "failure" jumps.
*/
if (( n = setjmp(sjbuf))) /* if a "failure jump" was taken... */
{
alarm(0); /* disable timeouts */
if (( n1 = setjmp(sjbuf))) /* failure while handling failure */
{
printf("%s failure while handling failure.\n", F_reason[n1]);
}
else /* first (i.e., non-nested) failure */
{
signal(SIGALRM, dialtime); /* be sure to catch signals */
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
{
signal(SIGINT, dialint);
}
alarm(10); /* be sure to exit this section */
ttclos(); /* hangup and close the line */
}
switch (n) /* type of failure */
{
case F_time: /* timed out */
{
printf("No connection made within the allotted time.\n");
debug(F110, "dial", "timeout", 0);
break;
}
case F_int: /* dialing interrupted */
{
printf("Dialing interrupted.\n");
debug(F110, "dial", "interrupted", 0);
break;
}
case F_modem: /* modem detected a failure */
{
printf("Failed (\"");
for (pc = lbuf; *pc; pc++)
{
if (isprint(*pc))
{
putchar(*pc); /* display printable reason */
}
}
printf("\").\n");
debug(F110, "dial", lbuf, 0);
break;
}
case F_minit: /* cannot initialize modem */
{
printf("Cannot initialize modem.\n");
debug(F110, "dial", "modem init", 0);
break;
}
}
reset(); /* reset alarms, etc. */
return ( -2 ); /* exit with failure code */
}
/*
* Set timer and interrupt handlers.
*/
/* The following call to ttflui()
* commented out because ttpkt
* just did this!
*/
/* ttflui(); */ /* flush input buffer if any */
savAlrm = signal(
SIGALRM, dialtime); /* set alarm handler */
if (( savInt = signal(
SIGINT, SIG_IGN)) != SIG_IGN)
{
signal(SIGINT, dialint); /* set int handler if not ignored */
}
debug(F100,
"ckdial giving modem 10 secs to wake up", "", 0);
alarm(10); /* give modem 10s to wake up. */
/*
* Put modem in
* command mode.
*/
#define OKAY 1 /* modem attention attempt status */
#define IGNORE 2
#define GOT_O -2
#define GOT_A -3
switch (augmdmtyp)
{
case n_HAYES:
case n_HAYESNV:
while (tries++ < 4)
{
ttol(
HAYES.wake_str,
strlen(
HAYES.wake_str)); /* wakeup */
status = 0;
while (status <= 0)
{
switch (ttinc(0) & 0177)
{
case 'A': /* echo, ignore */
status = GOT_A;
break;
case 'T':
if (status == GOT_A)
{
mdmEcho = 1; /* expect echo later */
status = 0;
break;
}
status = IGNORE;
break;
case LF:
case CR:
status = 0;
break;
case '0': /* numeric result */
augmdmtyp = n_HAYESNV; /* nonverbal result */
status = OKAY;
break;
case 'O': /* maybe English code */
status = GOT_O;
break;
case 'K':
if (status == GOT_O)
{
augmdmtyp = n_HAYES;
status = OKAY;
break;
} /* default */
default:
status = IGNORE;
break;
}
}
if (status == OKAY)
{
break;
}
if (status == IGNORE)
{
ttflui();
}
sleep(1); /* wait, then retry */
}
if (status != 0)
{
break;
}
longjmp(sjbuf, F_minit); /* modem-init failure */
/*
* interdigit waits
* for tone dial
*/
case n_MICROCOM: {
jmp_buf savejmp;
alarm(0);
xcpy((char *)savejmp,
(char *)sjbuf,
sizeof savejmp);
if (setjmp(sjbuf)) /* autobaud sequence */
{
xcpy((char *)sjbuf, (char *)savejmp, sizeof savejmp);
alarm(5);
ttolSlow("44445", MICROCOM.wake_rate);
waitFor(MICROCOM.wake_str);