Asterisk.org: Developer Documentation (28 Oct 2009)

Wed Oct 28 15:47:49 2009

## Asterisk developer's documentation

# app_softhangup.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 SoftHangup application
    00022  *
    00023  * \ingroup applications
    00024  */
    00025
    00026 #include <stdlib.h>
    00027 #include <stdio.h>
    00028 #include <string.h>
    00029 #include <unistd.h>
    00030 #include <sys/types.h>
    00031
    00032 #include "asterisk.h"
    00033
    00034 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
    00035
    00036 #include "asterisk/file.h"
    00037 #include "asterisk/logger.h"
    00038 #include "asterisk/channel.h"
    00039 #include "asterisk/pbx.h"
    00040 #include "asterisk/module.h"
    00041 #include "asterisk/lock.h"
    00042
    00043 static char *synopsis = "Soft Hangup Application";
    00044
    00045 static char *tdesc = "Hangs up the requested channel";
    00046
    00047 static char *desc = "  SoftHangup(Technology/resource|options)\n"
    00048 "Hangs up the requested channel.  If there are no channels to hangup,\n"
    00049 "the application will report it.\n"
    00050 "- 'options' may contain the following letter:\n"
    00051 "     'a' : hang up all channels on a specified device instead of a single resource\n";
    00052
    00053 static char *app = "SoftHangup";
    00054
    00055 STANDARD_LOCAL_USER;
    00056
    00057 LOCAL_USER_DECL;
    00058
    00059 static int softhangup_exec(struct ast_channel *chan, void *data)
    00060 {
    00061    struct localuser *u;
    00062    struct ast_channel *c=NULL;
    00063    char *options, *cut, *cdata, *match;
    00064    char name[AST_CHANNEL_NAME] = "";
    00065    int all = 0;
    00066
    00067    if (ast_strlen_zero(data)) {
    00068                 ast_log(LOG_WARNING, "SoftHangup requires an argument (Technology/resource)\n");
    00069       return 0;
    00070    }
    00071
    00072    LOCAL_USER_ADD(u);
    00073
    00074    cdata = ast_strdupa(data);
    00075    match = strsep(&cdata, "|");
    00076    options = strsep(&cdata, "|");
    00077    all = options && strchr(options,'a');
    00078    c = ast_channel_walk_locked(NULL);
    00079    while (c) {
    00080       strncpy(name, c->name, sizeof(name)-1);
    00081       ast_mutex_unlock(&c->lock);
    00082       /* XXX watch out, i think it is wrong to access c-> after unlocking! */
    00083       if (all) {
    00084          /* CAPI is set up like CAPI[foo/bar]/clcnt */
    00085          if (!strcmp(c->type,"CAPI"))
    00086             cut = strrchr(name,'/');
    00087          /* Basically everything else is Foo/Bar-Z */
    00088          else
    00089             cut = strchr(name,'-');
    00090          /* Get rid of what we've cut */
    00091          if (cut)
    00092             *cut = 0;
    00093       }
    00094       if (!strcasecmp(name, match)) {
    00095          ast_log(LOG_WARNING, "Soft hanging %s up.\n",c->name);
    00096          ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
    00097          if(!all)
    00098             break;
    00099       }
    00100       c = ast_channel_walk_locked(c);
    00101    }
    00102
    00103    LOCAL_USER_REMOVE(u);
    00104
    00105    return 0;
    00106 }
    00107
    00108 int unload_module(void)
    00109 {
    00110    int res;
    00111
    00112    res = ast_unregister_application(app);
    00113
    00114    STANDARD_HANGUP_LOCALUSERS;
    00115
    00116    return res;
    00117 }
    00118
    00119 int load_module(void)
    00120 {
    00121    return ast_register_application(app, softhangup_exec, synopsis, desc);
    00122 }
    00123
    00124 char *description(void)
    00125 {
    00126    return tdesc;
    00127 }
    00128
    00129 int usecount(void)
    00130 {
    00131    int res;
    00132    STANDARD_USECOUNT(res);
    00133    return res;
    00134 }
    00135
    00136 char *key()
    00137 {
    00138    return ASTERISK_GPL_KEY;
    00139 }