Asterisk.org: Developer Documentation (28 Oct 2009)

Wed Oct 28 15:47:49 2009

## Asterisk developer's documentation

# app_zapateller.c

Go to the documentation of this file.

    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 }