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5913d94de8d52e6a69c0123abf42f633cf24af94
rtems/cpukit/pppd/chat.c
Joel Sherrill d0950adfd6 Added port of ppp-2.3.5 from Tomasz Domin <dot@comarch.pl> of ComArch SA. 
Tomasz only tested this on the mpc823.

The official site for the original source for this PPP implementation is:

ftp://cs.anu.edu.au/pub/software/ppp

NOTE:  As of 11/30/1999, the current version of this source is 2.3.10.
1999-11-30 22:12:50 +00:00

1005 lines
18 KiB
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Raw Blame History

/*
* Chat -- a program for automatic session establishment (i.e. dial
* the phone and log in).
*
* Standard termination codes:
* 0 - successful completion of the script
* 1 - invalid argument, expect string too large, etc.
* 2 - error on an I/O operation or fatal error condition.
* 3 - timeout waiting for a simple string.
* 4 - the first string declared as "ABORT"
* 5 - the second string declared as "ABORT"
* 6 - ... and so on for successive ABORT strings.
*
* This software is in the public domain.
*
* -----------------
* added -T and -U option and \T and \U substitution to pass a phone
* number into chat script. Two are needed for some ISDN TA applications.
* Keith Dart <kdart@cisco.com>
*
*
* Added SAY keyword to send output to stderr.
* This allows to turn ECHO OFF and to output specific, user selected,
* text to give progress messages. This best works when stderr
* exists (i.e.: pppd in nodetach mode).
*
* Added HANGUP directives to allow for us to be called
* back. When HANGUP is set to NO, chat will not hangup at HUP signal.
* We rely on timeouts in that case.
*
* Added CLR_ABORT to clear previously set ABORT string. This has been
* dictated by the HANGUP above as "NO CARRIER" (for example) must be
* an ABORT condition until we know the other host is going to close
* the connection for call back. As soon as we have completed the
* first stage of the call back sequence, "NO CARRIER" is a valid, non
* fatal string. As soon as we got called back (probably get "CONNECT"),
* we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command.
* Note that CLR_ABORT packs the abort_strings[] array so that we do not
* have unused entries not being reclaimed.
*
* In the same vein as above, added CLR_REPORT keyword.
*
* Allow for comments. Line starting with '#' are comments and are
* ignored. If a '#' is to be expected as the first character, the
* expect string must be quoted.
*
*
* Francis Demierre <Francis@SwissMail.Com>
* Thu May 15 17:15:40 MET DST 1997
*
*
* Added -r "report file" switch & REPORT keyword.
* Robert Geer <bgeer@xmission.com>
*
* Added -s "use stderr" and -S "don't use syslog" switches.
* June 18, 1997
* Karl O. Pinc <kop@meme.com>
*
*
* Added -e "echo" switch & ECHO keyword
* Dick Streefland <dicks@tasking.nl>
*
*
* Considerable updates and modifications by
* Al Longyear <longyear@pobox.com>
* Paul Mackerras <paulus@cs.anu.edu.au>
*
*
* The original author is:
*
* Karl Fox <karl@MorningStar.Com>
* Morning Star Technologies, Inc.
* 1760 Zollinger Road
* Columbus, OH 43221
* (614)451-1883
*
*
*/
#ifndef lint
/* static char rcsid[] = ""; */
#endif
#include <stdio.h>
#include <ctype.h>
#include <time.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <syslog.h>
#undef TERMIOS
#define TERMIOS
#include <termios.h>
#define STR_LEN 1024
char temp2[STR_LEN];
#ifndef SIGTYPE
#define SIGTYPE void
#endif
#undef __P
#undef __V
#ifdef __STDC__
#include <stdarg.h>
#define __V(x) x
#define __P(x) x
#else
#include <varargs.h>
#define __V(x) (va_alist) va_dcl
#define __P(x) ()
#define const
#endif
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
/*************** Micro getopt() *********************************************/
#define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
#define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
(_O=4,(char*)0):(char*)0)
#define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0)
#define ARG(c,v) (c?(--c,*v++):(char*)0)
#if 0
static int _O = 0; /* Internal state */
#endif
/*************** Micro getopt() *********************************************/
char *program_name;
#define MAX_ABORTS 5
#define MAX_REPORTS 5
#define DEFAULT_CHAT_TIMEOUT 45
#define fcntl(a, b,c ) 0
#define MAX_TIMEOUTS 10
int echo = 0;
int verbose = 0;
int to_log = 1;
int to_stderr = 0;
int Verbose = 0;
int quiet = 0;
int report = 0;
int exit_code = 0;
static int speed=0;
char *report_file = (char *) 0;
char *chat_file = (char *) 0;
char *phone_num = (char *) 0;
char *phone_num2 = (char *) 0;
int chat_timeout = DEFAULT_CHAT_TIMEOUT;
static int timeout = DEFAULT_CHAT_TIMEOUT;
int have_tty_parameters = 0;
#ifdef TERMIOS
#define term_parms struct termios
#define get_term_param(param) tcgetattr(modem_fd, param)
#define set_term_param(param) tcsetattr(modem_fd, TCSANOW, param)
struct termios saved_tty_parameters;
#endif
char *abort_string[MAX_ABORTS]={"BUSY","NO DIALTONE","NO CARRIER","NO ASWER","RINGING\r\n\r\nRINGING"};
char *fail_reason = (char *)0,
fail_buffer[50];
int n_aborts = MAX_ABORTS, abort_next = 0, timeout_next = 0, echo_next = 0;
int clear_abort_next = 0;
char *report_string[MAX_REPORTS] ;
char report_buffer[50] ;
int n_reports = 0, report_next = 0, report_gathering = 0 ;
int clear_report_next = 0;
int say_next = 0, hup_next = 0;
void *dup_mem __P((void *b, size_t c));
void *copy_of __P((char *s));
/*
SIGTYPE sigalrm __P((int signo));
SIGTYPE sigint __P((int signo));
SIGTYPE sigterm __P((int signo));
SIGTYPE sighup __P((int signo));
*/
void unalarm __P((void));
void init __P((void));
void set_tty_parameters __P((void));
void echo_stderr __P((int));
void break_sequence __P((void));
void terminate __P((int status));
void do_file __P((char *chat_file));
int get_string __P((register char *string));
int put_string __P((register char *s));
int write_char __P((int c));
int put_char __P((int c));
int get_char __P((void));
void chat_send __P((register char *s));
char *character __P((int c));
void chat_expect __P((register char *s));
char *clean __P((register char *s, int sending));
void break_sequence __P((void));
void terminate __P((int status));
void pack_array __P((char **array, int end));
char *expect_strtok __P((char *, char *));
int vfmtmsg __P((char *, int, const char *, va_list)); /* vsprintf++ */
#if 0
int usleep( long usec ); /* returns 0 if ok, else -1 */
#endif
extern int input_fd,output_fd;
int main __P((int, char *[]));
void *dup_mem(b, c)
void *b;
size_t c;
{
void *ans = malloc (c);
if (!ans)
return NULL;
memcpy (ans, b, c);
return ans;
}
void *copy_of (s)
char *s;
{
return dup_mem (s, strlen (s) + 1);
}
/*
* chat [ -v ] [-T number] [-U number] [ -t timeout ] [ -f chat-file ] \
* [ -r report-file ] \
* [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
*
* Perform a UUCP-dialer-like chat script on stdin and stdout.
*/
char *getnextcommand(char **string)
{
char *buf=*string,*res;
res=strchr(buf,'@');
if (res==NULL)
return NULL;
*res='\0';
*string=res+1;
return buf;
}
extern int modem_fd;
int
chatmain(argv)
char *argv;
{
char *arg;
int i;
char *t;
exit_code=0;
speed=0;
/*
* Default the report file to the stderr location
*/
/* if (report_fp == NULL)
report_fp = stderr;
*/
init();
while ( (arg = getnextcommand(&argv)) != NULL) {
chat_expect(arg);
if (exit_code>0) break;
t=temp2;
while(*t)
{
if (strncmp("CARRIER",t,7)==0)
{/* parse speed information */
i=0;
while(!isdigit(t[i]))
i++;
t=&t[i];
i=0;
while(isdigit(t[i]))
i++;
t[i]=0;
sscanf(t,"%d",&speed);
break;
}
t++;
}
if ((arg = getnextcommand(&argv)) != NULL)
chat_send(arg);
if (exit_code>0) break;
}
if (exit_code) return exit_code;
return -speed;
}
/*
* Print an error message and terminate.
*/
void init()
{
set_tty_parameters();
speed=0;
}
void set_tty_parameters()
{
term_parms t;
if (get_term_param (&t) < 0)
syslog(LOG_NOTICE,"Can't get terminal parameters:")
;
saved_tty_parameters = t;
have_tty_parameters = 1;
t.c_iflag |= IGNBRK | ISTRIP | IGNPAR;
t.c_oflag = 0;
t.c_lflag = 0;
t.c_cc[VERASE] =
t.c_cc[VKILL] = 0;
t.c_cc[VMIN] = 0;
t.c_cc[VTIME] = 1;
if (set_term_param (&t) < 0)
syslog(LOG_NOTICE,"Can't set terminal parameters:")
;
}
void break_sequence()
{
/* tcsendbreak (0, 0);*/
}
/*void terminate(status)
int status;
{
echo_stderr(-1);
if (have_tty_parameters) {
if (set_term_param (&saved_tty_parameters) < 0)
fatal(2, "Can't restore terminal parameters: %m");
}
}
*/
/*
* 'Clean up' this string.
*/
char *clean(s, sending)
register char *s;
int sending; /* set to 1 when sending (putting) this string. */
{
char temp[STR_LEN], cur_chr;
register char *s1, *phchar;
int add_return = sending;
#define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
s1 = temp;
while (*s) {
cur_chr = *s++;
if (cur_chr == '^') {
cur_chr = *s++;
if (cur_chr == '\0') {
*s1++ = '^';
break;
}
cur_chr &= 0x1F;
if (cur_chr != 0) {
*s1++ = cur_chr;
}
continue;
}
if (cur_chr != '\\') {
*s1++ = cur_chr;
continue;
}
cur_chr = *s++;
if (cur_chr == '\0') {
if (sending) {
*s1++ = '\\';
*s1++ = '\\';
}
break;
}
switch (cur_chr) {
case 'b':
*s1++ = '\b';
break;
case 'c':
if (sending && *s == '\0')
add_return = 0;
else
*s1++ = cur_chr;
break;
case '\\':
case 'K':
case 'p':
case 'd':
if (sending)
*s1++ = '\\';
*s1++ = cur_chr;
break;
case 'T':
if (sending && phone_num) {
for ( phchar = phone_num; *phchar != '\0'; phchar++)
*s1++ = *phchar;
}
else {
*s1++ = '\\';
*s1++ = 'T';
}
break;
case 'U':
if (sending && phone_num2) {
for ( phchar = phone_num2; *phchar != '\0'; phchar++)
*s1++ = *phchar;
}
else {
*s1++ = '\\';
*s1++ = 'U';
}
break;
case 'q':
quiet = 1;
break;
case 'r':
*s1++ = '\r';
break;
case 'n':
*s1++ = '\n';
break;
case 's':
*s1++ = ' ';
break;
case 't':
*s1++ = '\t';
break;
case 'N':
if (sending) {
*s1++ = '\\';
*s1++ = '\0';
}
else
*s1++ = 'N';
break;
default:
if (isoctal (cur_chr)) {
cur_chr &= 0x07;
if (isoctal (*s)) {
cur_chr <<= 3;
cur_chr |= *s++ - '0';
if (isoctal (*s)) {
cur_chr <<= 3;
cur_chr |= *s++ - '0';
}
}
if (cur_chr != 0 || sending) {
if (sending && (cur_chr == '\\' || cur_chr == 0))
*s1++ = '\\';
*s1++ = cur_chr;
}
break;
}
if (sending)
*s1++ = '\\';
*s1++ = cur_chr;
break;
}
}
if (add_return)
*s1++ = '\r';
*s1++ = '\0'; /* guarantee closure */
*s1++ = '\0'; /* terminate the string */
return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
}
/*
* A modified version of 'strtok'. This version skips \ sequences.
*/
char *expect_strtok (s, term)
char *s, *term;
{
static char *str = "";
int escape_flag = 0;
char *result;
/*
* If a string was specified then do initial processing.
*/
if (s)
str = s;
/*
* If this is the escape flag then reset it and ignore the character.
*/
if (*str)
result = str;
else
result = (char *) 0;
while (*str) {
if (escape_flag) {
escape_flag = 0;
++str;
continue;
}
if (*str == '\\') {
++str;
escape_flag = 1;
continue;
}
/*
* If this is not in the termination string, continue.
*/
if (strchr (term, *str) == (char *) 0) {
++str;
continue;
}
/*
* This is the terminator. Mark the end of the string and stop.
*/
*str++ = '\0';
break;
}
return (result);
}
/*
* Process the expect string
*/
void chat_expect (s)
char *s;
{
char *expect;
char *reply;
if (strcmp(s, "HANGUP") == 0) {
++hup_next;
return ;
}
if (strcmp(s, "ABORT") == 0) {
++abort_next;
return ;
}
if (strcmp(s, "CLR_ABORT") == 0) {
++clear_abort_next;
return ;
}
if (strcmp(s, "REPORT") == 0) {
++report_next;
return ;
}
if (strcmp(s, "CLR_REPORT") == 0) {
++clear_report_next;
return ;
}
if (strcmp(s, "TIMEOUT") == 0) {
++timeout_next;
return ;
}
if (strcmp(s, "ECHO") == 0) {
++echo_next;
return ;
}
if (strcmp(s, "SAY") == 0) {
++say_next;
return ;
}
/*
* Fetch the expect and reply string.
*/
for (;;) {
expect = expect_strtok (s, "-");
s = (char *)0 ;
if (expect == (char *) 0)
return ;
reply = expect_strtok (s, "-");
/*
* Handle the expect string. If successful then exit.
*/
if (get_string (expect))
return;
/*
* If there is a sub-reply string then send it. Otherwise any condition
* is terminal.
*/
if (reply == (char *) 0 || exit_code != 3)
break;
chat_send (reply);
}
/*
* The expectation did not occur. This is terminal.
*/
return ;
}
/*
* process the reply string
*/
void chat_send (s)
register char *s;
{
if (say_next) {
say_next = 0;
s = clean(s,0);
write(modem_fd, s, strlen(s));
free(s);
return;
}
if (hup_next) {
hup_next = 0;
}
if (echo_next) {
echo_next = 0;
echo = (strcmp(s, "ON") == 0);
return;
}
if (abort_next) {
/* char *s1; */
;
return;
}
/* if (report_next) {
char *s1;
report_next = 0;
if (n_reports >= MAX_REPORTS)
{
exit_code=2;
return;
}
s1 = clean(s, 0);
if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
{
exit_code=1;
return;
}
report_string[n_reports++] = s1;
return;
}
*/
/* if (clear_report_next) {
char *s1;
int i;
int old_max;
int pack = 0;
clear_report_next = 0;
s1 = clean(s, 0);
if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
{
exit_code=1;
return;
}
old_max = n_reports;
for (i=0; i < n_reports; i++) {
if ( strcmp(s1,report_string[i]) == 0 ) {
free(report_string[i]);
report_string[i] = NULL;
pack++;
n_reports--;
}
}
free(s1);
if (pack)
pack_array(report_string,old_max);
return;
}
*/
if (timeout_next) {
timeout=atoi(s);
timeout_next = 0;
chat_timeout = atoi(s);
if (chat_timeout <= 0)
chat_timeout = DEFAULT_CHAT_TIMEOUT;
return;
}
if (strcmp(s, "EOT") == 0)
s = "^D\\c";
else if (strcmp(s, "BREAK") == 0)
s = "\\K\\c";
if (!put_string(s))
{
exit_code=1;
return;
}
}
int get_char()
{
int status;
char c;
int tries=MAX_TIMEOUTS;
while(tries)
{
status = read(modem_fd, &c, 1);
switch (status) {
case 1:
return ((int)c & 0x7F);
default:
tries--;
}
}
return -1;
}
int put_char(c)
int c;
{
int status;
char ch = c;
/* inter-character typing delay (?) */
status = write(modem_fd, &ch, 1);
switch (status) {
case 1:
return (0);
default:
}
return 0;
}
int write_char (c)
int c;
{
if (put_char(c) < 0) {
return (0);
}
return (1);
}
int put_string (s)
register char *s;
{
quiet = 0;
s = clean(s, 1);
while (*s) {
register char c = *s++;
if (c != '\\') {
if (!write_char (c))
return 0;
continue;
}
c = *s++;
switch (c) {
case 'd':
sleep(1);
break;
case 'K':
break_sequence();
break;
case 'p':
usleep(10000); /* 1/100th of a second (arg is microseconds) */
break;
default:
if (!write_char (c))
return 0;
break;
}
}
/* alarm(0);*/
return (1);
}
/*
* Echo a character to stderr.
* When called with -1, a '\n' character is generated when
* the cursor is not at the beginning of a line.
*/
void echo_stderr(n)
int n;
{
/* static int need_lf;
char *s;
switch (n) {
case '\r':
break;
case -1:
if (need_lf == 0)
break;
case '\n':
write(2, "\n", 1);
need_lf = 0;
break;
default:
s = character(n);
write(2, s, strlen(s));
need_lf = 1;
break;
}*/
}
/*
* 'Wait for' this string to appear on this file descriptor.
*/
int get_string(string)
register char *string;
{
int c, len, minlen;
register char *s = temp2, *end = s + STR_LEN;
char *logged = temp2;
struct termios tios;
tcgetattr(modem_fd, &tios);
tios.c_cc[VMIN] = 0;
tios.c_cc[VTIME] = timeout*10/MAX_TIMEOUTS;
tcsetattr(modem_fd, TCSANOW, &tios);
string = clean(string, 0);
len = strlen(string);
minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
if (len > STR_LEN) {
exit_code = 1;
return 0;
}
if (len == 0) {
return (1);
}
while ( (c = get_char()) >= 0) {
int n, abort_len;
*s++ = c;
*s=0;
if (s - temp2 >= len &&
c == string[len - 1] &&
strncmp(s - len, string, len) == 0) {
return (1);
}
for (n = 0; n < n_aborts; ++n) {
if (s - temp2 >= (abort_len = strlen(abort_string[n])) &&
strncmp(s - abort_len, abort_string[n], abort_len) == 0) {
exit_code = n + 4;
strcpy(fail_reason = fail_buffer, abort_string[n]);
return (0);
}
}
if (s >= end) {
if (logged < s - minlen) {
logged = s;
}
s -= minlen;
memmove(temp2, s, minlen);
logged = temp2 + (logged - s);
s = temp2 + minlen;
}
}
exit_code = 3;
return (0);
}
/*
* Gross kludge to handle Solaris versions >= 2.6 having usleep.
*/
/*
usleep -- support routine for 4.2BSD system call emulations
last edit: 29-Oct-1984 D A Gwyn
*/
#if 0
int
usleep( usec ) /* returns 0 if ok, else -1 */
long usec; /* delay in microseconds */
{
rtems_status_code status;
rtems_interval ticks_per_second;
rtems_interval ticks;
status = rtems_clock_get(
RTEMS_CLOCK_GET_TICKS_PER_SECOND,
&ticks_per_second);
ticks = (usec * (ticks_per_second/1000))/1000;
status = rtems_task_wake_after( ticks );
return 0;
}
#endif
void pack_array (array, end)
char **array; /* The address of the array of string pointers */
int end; /* The index of the next free entry before CLR_ */
{
int i, j;
for (i = 0; i < end; i++) {
if (array[i] == NULL) {
for (j = i+1; j < end; ++j)
if (array[j] != NULL)
array[i++] = array[j];
for (; i < end; ++i)
array[i] = NULL;
break;
}
}
}
/*
* vfmtmsg - format a message into a buffer. Like vsprintf except we
* also specify the length of the output buffer, and we handle the
* %m (error message) format.
* Doesn't do floating-point formats.
* Returns the number of chars put into buf.
*/
#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
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