Sat Mar 24 23:26:00 2007

Asterisk developer's documentation


app_zapateller.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief Playback the special information tone to get rid of telemarketers
00022  * 
00023  * \ingroup applications
00024  */
00025  
00026 #include <stdlib.h>
00027 #include <stdio.h>
00028 #include <string.h>
00029 
00030 #include "asterisk.h"
00031 
00032 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
00033 
00034 #include "asterisk/lock.h"
00035 #include "asterisk/file.h"
00036 #include "asterisk/logger.h"
00037 #include "asterisk/channel.h"
00038 #include "asterisk/pbx.h"
00039 #include "asterisk/module.h"
00040 #include "asterisk/translate.h"
00041 
00042 static char *tdesc = "Block Telemarketers with Special Information Tone";
00043 
00044 static char *app = "Zapateller";
00045 
00046 static char *synopsis = "Block telemarketers with SIT";
00047 
00048 static char *descrip = 
00049 "  Zapateller(options):  Generates special information tone to block\n"
00050 "telemarketers from calling you.  Options is a pipe-delimited list of\n" 
00051 "options.  The following options are available:\n"
00052 "'answer' causes the line to be answered before playing the tone,\n" 
00053 "'nocallerid' causes Zapateller to only play the tone if there\n"
00054 "is no callerid information available.  Options should be separated by |\n"
00055 "characters\n";
00056 
00057 STANDARD_LOCAL_USER;
00058 
00059 LOCAL_USER_DECL;
00060 
00061 static int zapateller_exec(struct ast_channel *chan, void *data)
00062 {
00063    int res = 0;
00064    struct localuser *u;
00065    int answer = 0, nocallerid = 0;
00066    char *c;
00067    char *stringp=NULL;
00068    
00069    LOCAL_USER_ADD(u);
00070 
00071    stringp=data;
00072         c = strsep(&stringp, "|");
00073         while(!ast_strlen_zero(c)) {
00074       if (!strcasecmp(c, "answer"))
00075          answer = 1;
00076       else if (!strcasecmp(c, "nocallerid"))
00077          nocallerid = 1;
00078 
00079                 c = strsep(&stringp, "|");
00080         }
00081 
00082    ast_stopstream(chan);
00083    if (chan->_state != AST_STATE_UP) {
00084 
00085       if (answer) 
00086          res = ast_answer(chan);
00087       if (!res) {
00088          res = ast_safe_sleep(chan, 500);
00089       }
00090    }
00091    if (chan->cid.cid_num && nocallerid) {
00092       LOCAL_USER_REMOVE(u);
00093       return res;
00094    } 
00095    if (!res) 
00096       res = ast_tonepair(chan, 950, 0, 330, 0);
00097    if (!res) 
00098       res = ast_tonepair(chan, 1400, 0, 330, 0);
00099    if (!res) 
00100       res = ast_tonepair(chan, 1800, 0, 330, 0);
00101    if (!res) 
00102       res = ast_tonepair(chan, 0, 0, 1000, 0);
00103    LOCAL_USER_REMOVE(u);
00104    return res;
00105 }
00106 
00107 int unload_module(void)
00108 {
00109    int res;
00110 
00111    res = ast_unregister_application(app);
00112    
00113    STANDARD_HANGUP_LOCALUSERS;
00114 
00115    return res; 
00116 }
00117 
00118 int load_module(void)
00119 {
00120    return ast_register_application(app, zapateller_exec, synopsis, descrip);
00121 }
00122 
00123 char *description(void)
00124 {
00125    return tdesc;
00126 }
00127 
00128 int usecount(void)
00129 {
00130    int res;
00131    STANDARD_USECOUNT(res);
00132    return res;
00133 }
00134 
00135 char *key()
00136 {
00137    return ASTERISK_GPL_KEY;
00138 }

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