Merged revisions 245945 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

................
  r245945 | tilghman | 2010-02-10 08:06:12 -0600 (Wed, 10 Feb 2010) | 9 lines
  
  Merged revisions 245944 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r245944 | tilghman | 2010-02-10 07:37:13 -0600 (Wed, 10 Feb 2010) | 2 lines
    
    Include examples of FILTER usage in extension patterns where a "." may be a risk.
  ........
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@245946 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/extensions.conf.sample

@@ -316,7 +316,7 @@ exten => _91700XXXXXXX,1,Dial(IAX2/${GLOBAL(IAXINFO)}@iaxtel.com/${EXTEN:1}@iaxt
 ; International long distance through trunk
 ;
 exten => _9011.,1,Macro(dundi-e164,${EXTEN:4})
-exten => _9011.,n,Dial(${GLOBAL(TRUNK)}/${EXTEN:${GLOBAL(TRUNKMSD)}})
+exten => _9011.,n,Dial(${GLOBAL(TRUNK)}/${FILTER(0-9,${EXTEN:${GLOBAL(TRUNKMSD)}})})
 
 [trunkld]
 ;
@@ -624,7 +624,7 @@ include => demo
 ; An extension like the one below can be used for FWD, Nikotel, sipgate etc.
 ; Note that you must have a [sipprovider] section in sip.conf
 ;
-;exten => _41X.,1,Dial(SIP/${EXTEN:2}@sipprovider,,r)
+;exten => _41X.,1,Dial(SIP/${FILTER(0-9,${EXTEN:2})}@sipprovider,,r)
 
 ; Real extensions would go here. Generally you want real extensions to be
 ; 4 or 5 digits long (although there is no such requirement) and start with a

funcs/func_strings.c

@@ -90,8 +90,9 @@ static int filter(struct ast_channel *chan, const char *cmd, char *parse, char *
 	char *outbuf = buf, ac;
 	char allowed[256] = "";
 	size_t allowedlen = 0;
+	int32_t bitfield[8] = { 0, }; /* 256 bits */
 
-	AST_STANDARD_APP_ARGS(args, parse);
+	AST_STANDARD_RAW_ARGS(args, parse);
 
 	if (!args.string) {
 		ast_log(LOG_ERROR, "Usage: FILTER(<allowed-chars>,<string>)\n");
@@ -116,16 +117,23 @@ static int filter(struct ast_channel *chan, const char *cmd, char *parse, char *
 			 * Looks a little strange, until you realize that we can overflow
 			 * the size of a char.
 			 */
-			for (ac = c1; ac != c2 && allowedlen < sizeof(allowed) - 1; ac++)
-				allowed[allowedlen++] = ac;
-			allowed[allowedlen++] = ac;
+			for (ac = c1; ac != c2; ac++) {
+				bitfield[ac / 32] |= 1 << (ac % 32);
+			}
 
 			ast_debug(4, "c1=%d, c2=%d\n", c1, c2);
 
 			/* Decrement before the loop increment */
 			(args.allowed)--;
-		} else
-			allowed[allowedlen++] = c1;
+		} else {
+			bitfield[c1 / 32] |= 1 << (c1 % 32);
+		}
+	}
+
+	for (ac = 1; ac != 0; ac++) {
+		if (bitfield[ac / 32] & (1 << (ac % 32))) {
+			allowed[allowedlen++] = ac;
+		}
 	}
 
 	ast_debug(1, "Allowed: %s\n", allowed);