mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2025-12-10 01:23:22 +00:00
cb1e8a4644
* net/if_ppp.c, pppd/auth.c, pppd/chat.c, pppd/pppd.h, pppd/sys-rtems.c: Add server with pap-authorization capabilities as well as eliminate some warnings.
819 lines
15 KiB
C
819 lines
15 KiB
C
/*
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* Chat -- a program for automatic session establishment (i.e. dial
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* the phone and log in).
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*
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* Standard termination codes:
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* 0 - successful completion of the script
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* 1 - invalid argument, expect string too large, etc.
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* 2 - error on an I/O operation or fatal error condition.
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* 3 - timeout waiting for a simple string.
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* 4 - the first string declared as "ABORT"
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* 5 - the second string declared as "ABORT"
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* 6 - ... and so on for successive ABORT strings.
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*
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* This software is in the public domain.
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*
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* -----------------
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* 22-May-99 added environment substitutuion, enabled with -E switch.
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* Andreas Arens <andras@cityweb.de>.
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*
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* 12-May-99 added a feature to read data to be sent from a file,
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* if the send string starts with @. Idea from gpk <gpk@onramp.net>.
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*
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* added -T and -U option and \T and \U substitution to pass a phone
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* number into chat script. Two are needed for some ISDN TA applications.
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* Keith Dart <kdart@cisco.com>
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*
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*
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* Added SAY keyword to send output to stderr.
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* This allows to turn ECHO OFF and to output specific, user selected,
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* text to give progress messages. This best works when stderr
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* exists (i.e.: pppd in nodetach mode).
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*
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* Added HANGUP directives to allow for us to be called
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* back. When HANGUP is set to NO, chat will not hangup at HUP signal.
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* We rely on timeouts in that case.
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*
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* Added CLR_ABORT to clear previously set ABORT string. This has been
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* dictated by the HANGUP above as "NO CARRIER" (for example) must be
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* an ABORT condition until we know the other host is going to close
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* the connection for call back. As soon as we have completed the
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* first stage of the call back sequence, "NO CARRIER" is a valid, non
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* fatal string. As soon as we got called back (probably get "CONNECT"),
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* we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command.
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* Note that CLR_ABORT packs the abort_strings[] array so that we do not
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* have unused entries not being reclaimed.
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*
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* In the same vein as above, added CLR_REPORT keyword.
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*
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* Allow for comments. Line starting with '#' are comments and are
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* ignored. If a '#' is to be expected as the first character, the
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* expect string must be quoted.
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*
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*
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* Francis Demierre <Francis@SwissMail.Com>
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* Thu May 15 17:15:40 MET DST 1997
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*
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*
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* Added -r "report file" switch & REPORT keyword.
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* Robert Geer <bgeer@xmission.com>
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*
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* Added -s "use stderr" and -S "don't use syslog" switches.
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* June 18, 1997
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* Karl O. Pinc <kop@meme.com>
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*
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*
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* Added -e "echo" switch & ECHO keyword
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* Dick Streefland <dicks@tasking.nl>
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*
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*
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* Considerable updates and modifications by
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* Al Longyear <longyear@pobox.com>
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* Paul Mackerras <paulus@cs.anu.edu.au>
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*
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*
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* The original author is:
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*
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* Karl Fox <karl@MorningStar.Com>
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* Morning Star Technologies, Inc.
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* 1760 Zollinger Road
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* Columbus, OH 43221
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* (614)451-1883
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*
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <time.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <syslog.h>
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#include <termios.h>
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#include "pppd.h"
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#undef TERMIOS
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#define TERMIOS
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#define STR_LEN 1024
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char temp2[STR_LEN];
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#ifndef SIGTYPE
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#define SIGTYPE void
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#endif
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#undef __P
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#undef __V
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#ifdef __STDC__
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#include <stdarg.h>
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#define __V(x) x
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#define __P(x) x
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#else
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#include <varargs.h>
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#define __V(x) (va_alist) va_dcl
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#define __P(x) ()
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#define const
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#endif
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#ifndef O_NONBLOCK
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#define O_NONBLOCK O_NDELAY
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#endif
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/*************** Micro getopt() *********************************************/
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#define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
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(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
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&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
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#define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
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(_O=4,(char*)0):(char*)0)
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#define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0)
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#define ARG(c,v) (c?(--c,*v++):(char*)0)
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#if 0
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static int _O = 0; /* Internal state */
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#endif
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/*************** Micro getopt() *********************************************/
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char *program_name;
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#define MAX_ABORTS 16
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#define MAX_REPORTS 16
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#define DEFAULT_CHAT_TIMEOUT 45
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#define MAX_TIMEOUTS 10
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int echo = 0;
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int quiet = 0;
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int report = 0;
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int use_env = 0;
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int exit_code = 0;
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char *report_file = (char *) 0;
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char *chat_file = (char *) 0;
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char *phone_num = (char *) 0;
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char *phone_num2 = (char *) 0;
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static int ttyfd;
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static int timeout = DEFAULT_CHAT_TIMEOUT;
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#ifdef TERMIOS
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#define term_parms struct termios
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#define get_term_param(param) tcgetattr(0, param)
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#define set_term_param(param) tcsetattr(0, TCSANOW, param)
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struct termios saved_tty_parameters;
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#endif
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char *fail_reason = (char *)0;
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char fail_buffer[50];
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char *abort_string[MAX_ABORTS]={"BUSY","NO DIALTONE","NO CARRIER","NO ANSWER","RING\r\nRING"};
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int n_aborts = 5;
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int abort_next = 0, timeout_next = 0, echo_next = 0;
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int clear_abort_next = 0;
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char *report_string[MAX_REPORTS] ;
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char report_buffer[50] ;
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int n_reports = 0, report_next = 0, report_gathering = 0 ;
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int clear_report_next = 0;
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int say_next = 0, hup_next = 0;
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void *dup_mem __P((void *b, size_t c));
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void *copy_of __P((char *s));
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void break_sequence __P((void));
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int get_string __P((register char *string));
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int put_string __P((register char *s));
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int write_char __P((int c));
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int put_char __P((int c));
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int get_char __P((void));
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void chat_send __P((register char *s));
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char *character __P((int c));
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void chat_expect __P((register char *s));
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char *clean __P((register char *s, int sending));
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char *expect_strtok __P((char *, char *));
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int chatmain __P((int, int, char *));
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void *dup_mem(b, c)
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void *b;
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size_t c;
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{
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void *ans = malloc (c);
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if (!ans)
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return NULL;
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memcpy(ans, b, c);
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return ans;
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}
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void *copy_of (s)
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char *s;
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{
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return dup_mem(s, strlen (s) + 1);
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}
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char *getnextcommand(char **string)
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{
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char *buf=*string,*res;
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res=strchr(buf,'|');
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if (res==NULL)
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return NULL;
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*res='\0';
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*string=res+1;
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return buf;
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}
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int chatmain(int fd, int mode, char *pScript)
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{
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char *arg;
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/* initialize exit code */
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exit_code = 0;
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ttyfd = fd;
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if ( debug ) {
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dbglog("chat_main: %s\n", pScript);
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}
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/* get first expect string */
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arg = getnextcommand(&pScript);
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while (( arg != NULL ) && ( exit_code == 0 )) {
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/* process the expect string */
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chat_expect(arg);
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if ( exit_code == 0 ) {
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/* get the next send string */
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arg = getnextcommand(&pScript);
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if ( arg != NULL ) {
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/* process the send string */
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chat_send(arg);
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/* get the next expect string */
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arg = getnextcommand(&pScript);
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}
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}
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}
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ttyfd = (int)-1;
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return ( exit_code );
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}
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void break_sequence()
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{
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tcsendbreak(ttyfd, 0);
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}
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/*
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* 'Clean up' this string.
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*/
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char *clean(s, sending)
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register char *s;
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int sending; /* set to 1 when sending (putting) this string. */
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{
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char temp[STR_LEN], env_str[STR_LEN], cur_chr;
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register char *s1, *phchar;
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int add_return = sending;
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#define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
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#define isalnumx(chr) ((((chr) >= '0') && ((chr) <= '9')) \
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|| (((chr) >= 'a') && ((chr) <= 'z')) \
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|| (((chr) >= 'A') && ((chr) <= 'Z')) \
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|| (chr) == '_')
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s1 = temp;
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while (*s) {
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cur_chr = *s++;
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if (cur_chr == '^') {
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cur_chr = *s++;
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if (cur_chr == '\0') {
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*s1++ = '^';
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break;
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}
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cur_chr &= 0x1F;
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if (cur_chr != 0) {
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*s1++ = cur_chr;
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}
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continue;
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}
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if (use_env && cur_chr == '$') { /* ARI */
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phchar = env_str;
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while (isalnumx(*s))
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*phchar++ = *s++;
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*phchar = '\0';
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phchar = getenv(env_str);
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if (phchar)
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while (*phchar)
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*s1++ = *phchar++;
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continue;
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}
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if (cur_chr != '\\') {
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*s1++ = cur_chr;
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continue;
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}
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cur_chr = *s++;
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if (cur_chr == '\0') {
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if (sending) {
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*s1++ = '\\';
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*s1++ = '\\';
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}
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break;
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}
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switch (cur_chr) {
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case 'b':
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*s1++ = '\b';
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break;
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case 'c':
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if (sending && *s == '\0')
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add_return = 0;
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else
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*s1++ = cur_chr;
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break;
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case '\\':
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case 'K':
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case 'p':
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case 'd':
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if (sending)
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*s1++ = '\\';
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*s1++ = cur_chr;
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break;
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case 'T':
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if (sending && phone_num) {
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for (phchar = phone_num; *phchar != '\0'; phchar++)
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*s1++ = *phchar;
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}
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else {
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*s1++ = '\\';
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*s1++ = 'T';
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}
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break;
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case 'U':
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if (sending && phone_num2) {
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for (phchar = phone_num2; *phchar != '\0'; phchar++)
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*s1++ = *phchar;
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}
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else {
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*s1++ = '\\';
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*s1++ = 'U';
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}
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break;
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case 'q':
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quiet = 1;
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break;
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case 'r':
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*s1++ = '\r';
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break;
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case 'n':
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*s1++ = '\n';
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break;
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case 's':
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*s1++ = ' ';
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break;
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case 't':
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*s1++ = '\t';
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break;
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case 'N':
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if (sending) {
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*s1++ = '\\';
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*s1++ = '\0';
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}
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else
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*s1++ = 'N';
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break;
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case '$': /* ARI */
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if (use_env) {
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*s1++ = cur_chr;
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break;
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}
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/* FALL THROUGH */
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default:
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if (isoctal (cur_chr)) {
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cur_chr &= 0x07;
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if (isoctal (*s)) {
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cur_chr <<= 3;
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cur_chr |= *s++ - '0';
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if (isoctal (*s)) {
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cur_chr <<= 3;
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cur_chr |= *s++ - '0';
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}
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}
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if (cur_chr != 0 || sending) {
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if (sending && (cur_chr == '\\' || cur_chr == 0))
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*s1++ = '\\';
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*s1++ = cur_chr;
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}
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break;
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}
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if (sending)
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*s1++ = '\\';
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*s1++ = cur_chr;
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break;
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}
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}
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if (add_return)
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*s1++ = '\r';
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*s1++ = '\0'; /* guarantee closure */
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*s1++ = '\0'; /* terminate the string */
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return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
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}
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|
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/*
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* A modified version of 'strtok'. This version skips \ sequences.
|
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*/
|
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char *expect_strtok (s, term)
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char *s, *term;
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{
|
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static char *str = "";
|
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int escape_flag = 0;
|
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char *result;
|
|
|
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/*
|
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* If a string was specified then do initial processing.
|
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*/
|
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if (s)
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str = s;
|
|
|
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/*
|
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* If this is the escape flag then reset it and ignore the character.
|
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*/
|
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if (*str)
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result = str;
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else
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result = (char *) 0;
|
|
|
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while (*str) {
|
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if (escape_flag) {
|
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escape_flag = 0;
|
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++str;
|
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continue;
|
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}
|
|
|
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if (*str == '\\') {
|
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++str;
|
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escape_flag = 1;
|
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continue;
|
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}
|
|
|
|
/*
|
|
* If this is not in the termination string, continue.
|
|
*/
|
|
if (strchr (term, *str) == (char *) 0) {
|
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++str;
|
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continue;
|
|
}
|
|
|
|
/*
|
|
* This is the terminator. Mark the end of the string and stop.
|
|
*/
|
|
*str++ = '\0';
|
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break;
|
|
}
|
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return (result);
|
|
}
|
|
|
|
/*
|
|
* Process the expect string
|
|
*/
|
|
void chat_expect (s)
|
|
char *s;
|
|
{
|
|
char *expect;
|
|
char *reply;
|
|
|
|
if (strcmp(s, "HANGUP") == 0) {
|
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++hup_next;
|
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return;
|
|
}
|
|
|
|
if (strcmp(s, "ABORT") == 0) {
|
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++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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Translate the input character to the appropriate string for printing
|
|
* the data.
|
|
*/
|
|
|
|
char *character(c)
|
|
int c;
|
|
{
|
|
static char string[10];
|
|
char *meta;
|
|
|
|
meta = (c & 0x80) ? "M-" : "";
|
|
c &= 0x7F;
|
|
|
|
if (c < 32)
|
|
sprintf(string, "%s^%c", meta, (int)c + '@');
|
|
else if (c == 127)
|
|
sprintf(string, "%s^?", meta);
|
|
else
|
|
sprintf(string, "%s%c", meta, c);
|
|
|
|
return (string);
|
|
}
|
|
|
|
/*
|
|
* process the reply string
|
|
*/
|
|
void chat_send (s)
|
|
register char *s;
|
|
{
|
|
/* char file_data[STR_LEN]; */
|
|
|
|
if (say_next) {
|
|
say_next = 0;
|
|
s = clean(s, 1);
|
|
write(2, s, strlen(s));
|
|
free(s);
|
|
return;
|
|
}
|
|
|
|
if (hup_next) {
|
|
hup_next = 0;
|
|
return;
|
|
}
|
|
|
|
if (echo_next) {
|
|
echo_next = 0;
|
|
echo = (strcmp(s, "ON") == 0);
|
|
return;
|
|
}
|
|
|
|
if (abort_next) {
|
|
char *s1;
|
|
|
|
abort_next = 0;
|
|
if ( n_aborts < MAX_ABORTS ) {
|
|
s1 = clean(s, 0);
|
|
if (( strlen(s1) <= strlen(s) ) &&
|
|
( strlen(s1) < sizeof(fail_buffer))) {
|
|
|
|
abort_string[n_aborts++] = s1;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (clear_abort_next) {
|
|
clear_abort_next = 0;
|
|
return;
|
|
}
|
|
|
|
if (report_next) {
|
|
report_next = 0;
|
|
return;
|
|
}
|
|
|
|
if (clear_report_next) {
|
|
clear_report_next = 0;
|
|
return;
|
|
}
|
|
|
|
if (timeout_next) {
|
|
timeout_next = 0;
|
|
timeout = atoi(s);
|
|
|
|
if (timeout <= 0)
|
|
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 = 2;
|
|
}
|
|
}
|
|
|
|
int get_char()
|
|
{
|
|
int status;
|
|
char c;
|
|
int tries=MAX_TIMEOUTS;
|
|
|
|
while(tries)
|
|
{
|
|
status = read(ttyfd, &c, 1);
|
|
switch (status) {
|
|
case 1:
|
|
return ((int)c & 0x7F);
|
|
default:
|
|
tries--;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
int put_char(c)
|
|
int c;
|
|
{
|
|
char ch = c;
|
|
|
|
write(ttyfd, &ch, 1);
|
|
|
|
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':
|
|
#if 0 /* FIXME!!! */
|
|
usleep(10000); /* 1/100th of a second (arg is microseconds) */
|
|
#else
|
|
sleep(1);
|
|
#endif
|
|
break;
|
|
|
|
default:
|
|
if (!write_char (c))
|
|
return 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* '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;
|
|
|
|
memset(temp2, 0, sizeof(temp2));
|
|
|
|
tcgetattr(ttyfd, &tios);
|
|
tios.c_cc[VMIN] = 0;
|
|
tios.c_cc[VTIME] = timeout*10/MAX_TIMEOUTS;
|
|
tcsetattr(ttyfd, 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);
|
|
}
|