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-rw-r--r--cpukit/pppd/chat.c854
1 files changed, 854 insertions, 0 deletions
diff --git a/cpukit/pppd/chat.c b/cpukit/pppd/chat.c
new file mode 100644
index 0000000000..45e2707158
--- /dev/null
+++ b/cpukit/pppd/chat.c
@@ -0,0 +1,854 @@
+/*
+ * 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.
+ *
+ * -----------------
+ * 22-May-99 added environment substitutuion, enabled with -E switch.
+ * Andreas Arens <andras@cityweb.de>.
+ *
+ * 12-May-99 added a feature to read data to be sent from a file,
+ * if the send string starts with @. Idea from gpk <gpk@onramp.net>.
+ *
+ * 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
+ *
+ */
+
+/* $Id$ */
+
+/*
+ Fixes and some Changes by Wilfried Busalski Lancier-Monitoring GmbH Germany
+ wilfried.busalski@muenster.de
+
+ Fixes: put_string() Free memory allocated by clean()
+ get_string() Free memory allocated by clean()
+ chat_main() Will Distroy's no more the chat-script
+ getnextcommand() sepatator changed to '@'
+*/
+
+#include <stdio.h>
+#include <ctype.h>
+#include <time.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <syslog.h>
+#include <termios.h>
+#include "pppd.h"
+
+#undef TERMIOS
+#define TERMIOS
+
+
+#define STR_LEN 1024
+char temp2[STR_LEN];
+
+#ifndef SIGTYPE
+#define SIGTYPE void
+#endif
+
+#undef __V
+
+#ifdef __STDC__
+#include <stdarg.h>
+#define __V(x) x
+#else
+#include <varargs.h>
+#define __V(x) (va_alist) va_dcl
+#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() *********************************************/
+
+#define MAX_ABORTS 16
+#define MAX_REPORTS 16
+#define DEFAULT_CHAT_TIMEOUT 45
+#define MAX_TIMEOUTS 10
+
+static int echo = 0;
+static int quiet = 0;
+static int use_env = 0;
+static int exit_code = 0;
+static char *phone_num = (char *) 0;
+static char *phone_num2 = (char *) 0;
+static int ttyfd;
+static int timeout = DEFAULT_CHAT_TIMEOUT;
+
+#ifdef TERMIOS
+#define term_parms struct termios
+#define get_term_param(param) tcgetattr(0, param)
+#define set_term_param(param) tcsetattr(0, TCSANOW, param)
+struct termios saved_tty_parameters;
+#endif
+
+char *fail_reason = (char *)0;
+char fail_buffer[50];
+char *abort_string[MAX_ABORTS]={"BUSY","NO DIALTONE","NO CARRIER","NO ANSWER","RING\r\nRING"};
+int n_aborts = 5;
+int 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(void *b, size_t c);
+void *copy_of(char *s);
+void break_sequence(void);
+static int get_string(register char *string);
+static int put_string(register char *s);
+static int write_char(int c);
+static int put_char(int c);
+static int get_char(void);
+void chat_send(register char *s);
+/* static char *character(int c); */
+void chat_expect(register char *s);
+static char *clean(register char *s, int sending);
+char *expect_strtok(char *, char *);
+int chatmain(int, int, char *);
+
+
+void *dup_mem(
+ void *b,
+ size_t c)
+{
+ void *ans = malloc (c);
+ if (!ans)
+ return NULL;
+
+ memcpy(ans, b, c);
+ return ans;
+}
+
+void *copy_of(
+ char *s)
+{
+ return dup_mem(s, strlen (s) + 1);
+}
+
+char *getnextcommand(char *string,char *buff)
+{
+ char *token;
+ int len;
+
+ token=strchr(string,'@');
+ if (token==NULL){
+ return NULL;
+ }
+ len=token-string;
+ if(len > 78 ){
+ len=78;
+ }
+ memcpy(buff,string,len);
+ buff[len]=0;
+ return(token+1);
+}
+
+int chatmain(int fd, int mode, char *pScript)
+{
+ char arg[80];
+ char *script;
+
+ /* initialize exit code */
+ exit_code = 0;
+ ttyfd = fd;
+
+ script=pScript;
+
+ if ( debug ) {
+ dbglog("chat_main: %s\n", script);
+ }
+
+ /* get first expect string */
+ script = getnextcommand(script,arg);
+ while (( script != NULL ) && ( exit_code == 0 )) {
+ /* process the expect string */
+ chat_expect(arg);
+ if ( exit_code == 0 ) {
+ /* get the next send string */
+ script = getnextcommand(script,arg);
+ if ( script != NULL ) {
+ /* process the send string */
+ chat_send(arg);
+
+ /* get the next expect string */
+ script = getnextcommand(script,arg);
+ }
+ }
+ }
+ ttyfd = (int)-1;
+
+ return ( exit_code );
+}
+
+void break_sequence(void)
+{
+ tcsendbreak(ttyfd, 0);
+}
+
+/*
+ * 'Clean up' this string.
+ */
+static char *clean(
+ char *s,
+ int sending ) /* set to 1 when sending (putting) this string. */
+{
+ char temp[STR_LEN], env_str[STR_LEN], cur_chr;
+ register char *s1, *phchar;
+ int add_return = sending;
+#define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
+#define isalnumx(chr) ((((chr) >= '0') && ((chr) <= '9')) \
+ || (((chr) >= 'a') && ((chr) <= 'z')) \
+ || (((chr) >= 'A') && ((chr) <= 'Z')) \
+ || (chr) == '_')
+
+ 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 (use_env && cur_chr == '$') { /* ARI */
+ phchar = env_str;
+ while (isalnumx(*s))
+ *phchar++ = *s++;
+ *phchar = '\0';
+ phchar = getenv(env_str);
+ if (phchar)
+ while (*phchar)
+ *s1++ = *phchar++;
+ continue;
+ }
+
+ if (cur_chr != '\\') {
+ *s1++ = cur_chr;
+ continue;
+ }
+
+ cur_chr = *s++;
+ if (cur_chr == '\0') {
+ if (sending) {
+ *s1++ = '\\';
+ *s1++ = '\\';
+ }
+ break;
+ }
+
+ switch (cur_chr) {
+ case 'b':
+ *s1++ = '\b';
+ break;
+
+ case 'c':
+ if (sending && *s == '\0')
+ add_return = 0;
+ else
+ *s1++ = cur_chr;
+ break;
+
+ case '\\':
+ case 'K':
+ case 'p':
+ case 'd':
+ if (sending)
+ *s1++ = '\\';
+ *s1++ = cur_chr;
+ break;
+
+ case 'T':
+ if (sending && phone_num) {
+ for (phchar = phone_num; *phchar != '\0'; phchar++)
+ *s1++ = *phchar;
+ }
+ else {
+ *s1++ = '\\';
+ *s1++ = 'T';
+ }
+ break;
+
+ case 'U':
+ if (sending && phone_num2) {
+ for (phchar = phone_num2; *phchar != '\0'; phchar++)
+ *s1++ = *phchar;
+ }
+ else {
+ *s1++ = '\\';
+ *s1++ = 'U';
+ }
+ break;
+
+ case 'q':
+ quiet = 1;
+ break;
+
+ case 'r':
+ *s1++ = '\r';
+ break;
+
+ case 'n':
+ *s1++ = '\n';
+ break;
+
+ case 's':
+ *s1++ = ' ';
+ break;
+
+ case 't':
+ *s1++ = '\t';
+ break;
+
+ case 'N':
+ if (sending) {
+ *s1++ = '\\';
+ *s1++ = '\0';
+ }
+ else
+ *s1++ = 'N';
+ break;
+
+ case '$': /* ARI */
+ if (use_env) {
+ *s1++ = cur_chr;
+ break;
+ }
+ /* FALL THROUGH */
+
+ 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 (
+ char *s, char *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 (
+ 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);
+ }
+}
+
+#if 0
+/*
+ * Translate the input character to the appropriate string for printing
+ * the data.
+ */
+
+static char *character(
+ 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);
+}
+#endif
+
+/*
+ * process the reply string
+ */
+void chat_send (
+ 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) {
+ abort_next = 0;
+ if ( n_aborts < MAX_ABORTS ) {
+ char *s1;
+ s1 = clean(s, 0);
+ if (( strlen(s1) <= strlen(s) ) && ( strlen(s1) < sizeof(fail_buffer)))
+ abort_string[n_aborts++] = s1;
+ else
+ free(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;
+ }
+ }
+}
+
+static int get_char(void)
+{
+ 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;
+}
+
+static int put_char(
+ int c)
+{
+ char ch = c;
+
+ return(write(ttyfd, &ch, 1));
+}
+
+static int write_char (
+ int c)
+{
+ if (put_char(c) < 1) {
+ return (0);
+ }
+ return (1);
+}
+
+static int put_string (
+ char *s)
+{
+ char *out,*free_ptr=0;
+
+ quiet = 0;
+ out = free_ptr = clean(s, 1);
+ while (*out) {
+ register char c = *out++;
+
+ if (c != '\\') {
+ if (!write_char (c)){
+ free(free_ptr);
+ return 0;
+ }
+ continue;
+ }
+
+ c = *out++;
+
+ 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)){
+ free(free_ptr);
+ return 0;
+ }
+ break;
+ }
+ }
+ free(free_ptr);
+
+ return (1);
+}
+
+/*
+ * 'Wait for' this string to appear on this file descriptor.
+ */
+static int get_string(
+ char *in_string)
+{
+ int c, len, minlen;
+ register char *s = temp2, *end = s + STR_LEN;
+ char *logged = temp2;
+ char *string=0;
+ 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(in_string, 0);
+ len = strlen(string);
+ minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
+
+ if (len > STR_LEN) {
+ exit_code = 1;
+ free(string);
+ return 0;
+ }
+
+ if (len == 0) {
+ free(string);
+ return (1);
+ }
+
+ while ( (c = get_char()) >= 0) {
+ int n, abort_len;
+
+ if(c == '\n' || c == '\r'){
+ s = temp2;
+ *s=0;
+ }
+ else{
+ *s++ = c;
+ *s=0;
+ }
+
+ if (s - temp2 >= len &&
+ c == string[len - 1] &&
+ strncmp(s - len, string, len) == 0) {
+ free(string);
+ 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]);
+ free(string);
+ 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;
+ free(string);
+ return (0);
+}
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