X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=chat%2Fchat.c;h=336c0f4995f4ab3dadd1612673d251ec0d3507d5;hp=f625a8a4fee521fdc3e6e13edc88dd3463675af6;hb=HEAD;hpb=956c492a1828bee383534fd6103c6e2a1a46a302

diff --git a/chat/chat.c b/chat/chat.c
index f625a8a..788c42b 100644
--- a/chat/chat.c
+++ b/chat/chat.c
@@ -1,7 +1,32 @@
+/* SPDX-License-Identifier: MIT */
 /*
  *	Chat -- a program for automatic session establishment (i.e. dial
  *		the phone and log in).
  *
+ * This version is Copyright 1995-2024 Paul Mackerras <paulus@ozlabs.org>
+ * based on the original public-domain version by Karl Fox.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the “Software”), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
  * Standard termination codes:
  *  0 - successful completion of the script
  *  1 - invalid argument, expect string too large, etc.
@@ -11,7 +36,6 @@
  *  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.
@@ -182,7 +206,7 @@ int n_aborts = 0, abort_next = 0, timeout_next = 0, echo_next = 0;
 int clear_abort_next = 0;
 
 char *report_string[MAX_REPORTS] ;
-char  report_buffer[256] ;
+char  report_buffer[4096] ;
 int n_reports = 0, report_next = 0, report_gathering = 0 ; 
 int clear_report_next = 0;
 
@@ -609,7 +633,7 @@ void terminate(int status)
 	int c, rep_len;
 
 	rep_len = strlen(report_buffer);
-	while (rep_len + 1 <= sizeof(report_buffer)) {
+	while (rep_len + 1 < sizeof(report_buffer)) {
 	    alarm(1);
 	    c = get_char();
 	    alarm(0);
@@ -1133,7 +1157,7 @@ int chat_send (register char *s)
 
 	if (verbose)
 	    msgf("timeout set to %d seconds", timeout);
-
+	free(s);
 	return 0;
     }
 
@@ -1247,8 +1271,11 @@ int write_char(int c)
 
 int put_string(register char *s)
 {
+    char *s1;
     quiet = 0;
+
     s = clean(s, 1);
+    s1 = s;
 
     if (verbose) {
 	if (quiet)
@@ -1263,8 +1290,10 @@ int put_string(register char *s)
 	register char c = *s++;
 
 	if (c != '\\') {
-	    if (!write_char (c))
+	    if (!write_char (c)) {
+		free(s1);
 		return 0;
+	    }
 	    continue;
 	}
 
@@ -1283,8 +1312,10 @@ int put_string(register char *s)
 	    break;
 
 	default:
-	    if (!write_char (c))
+	    if (!write_char (c)) {
+		free(s1);
 		return 0;
+	    }
 	    break;
 	}
 	checksigs();
@@ -1292,6 +1323,7 @@ int put_string(register char *s)
 
     alarm(0);
     alarmed = 0;
+    free(s1);
     return (1);
 }
 
@@ -1336,10 +1368,10 @@ int get_string(register char *string)
     char temp[STR_LEN];
     int c, printed = 0, len, minlen;
     register char *s = temp, *end = s + STR_LEN;
-    char *logged = temp;
+    char *s1, *logged = temp;
 
     fail_reason = (char *)0;
-    string = clean(string, 0);
+    string = s1 = clean(string, 0);
     len = strlen(string);
     minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
 
@@ -1349,12 +1381,14 @@ int get_string(register char *string)
     if (len > STR_LEN) {
 	msgf("expect string is too long");
 	exit_code = 1;
+	free(s1);
 	return 0;
     }
 
     if (len == 0) {
 	if (verbose)
 	    msgf("got it");
+	free(s1);
 	return (1);
     }
 
@@ -1402,6 +1436,7 @@ int get_string(register char *string)
 		    strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now);
 		    strcat (report_buffer, report_string[n]);
 
+		    free(report_string[n]);
 		    report_string[n] = (char *) NULL;
 		    report_gathering = 1;
 		    break;
@@ -1411,8 +1446,10 @@ int get_string(register char *string)
 	else {
 	    if (!iscntrl (c)) {
 		int rep_len = strlen (report_buffer);
-		report_buffer[rep_len]     = c;
-		report_buffer[rep_len + 1] = '\0';
+		if ((rep_len + 1) < sizeof(report_buffer)) {
+		    report_buffer[rep_len]     = c;
+		    report_buffer[rep_len + 1] = '\0';
+		}
 	    }
 	    else {
 		report_gathering = 0;
@@ -1431,6 +1468,7 @@ int get_string(register char *string)
 
 	    alarm(0);
 	    alarmed = 0;
+	    free(s1);
 	    return (1);
 	}
 
@@ -1447,6 +1485,7 @@ int get_string(register char *string)
 		alarmed = 0;
 		exit_code = n + 4;
 		strcpy(fail_reason = fail_buffer, abort_string[n]);
+		free(s1);
 		return (0);
 	    }
 	}
@@ -1478,6 +1517,7 @@ int get_string(register char *string)
 
     exit_code = 3;
     alarmed   = 0;
+    free(s1);
     return (0);
 }