Fri Sep 29 11:12:23 2006

Asterisk developer's documentation


app_flash.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 App to flash a zap trunk
00022  * 
00023  * \ingroup applications
00024  */
00025  
00026 #include <stdlib.h>
00027 #include <stdio.h>
00028 #include <string.h>
00029 #include <errno.h>
00030 #include <sys/ioctl.h>
00031 #ifdef __linux__
00032 #include <linux/zaptel.h>
00033 #else
00034 #include <zaptel.h>
00035 #endif /* __linux__ */
00036 
00037 #include "asterisk.h"
00038 
00039 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
00040 
00041 #include "asterisk/lock.h"
00042 #include "asterisk/file.h"
00043 #include "asterisk/logger.h"
00044 #include "asterisk/channel.h"
00045 #include "asterisk/pbx.h"
00046 #include "asterisk/module.h"
00047 #include "asterisk/translate.h"
00048 #include "asterisk/image.h"
00049 #include "asterisk/options.h"
00050 
00051 static char *tdesc = "Flash zap trunk application";
00052 
00053 static char *app = "Flash";
00054 
00055 static char *synopsis = "Flashes a Zap Trunk";
00056 
00057 static char *descrip = 
00058 "  Flash(): Sends a flash on a zap trunk.  This is only a hack for\n"
00059 "people who want to perform transfers and such via AGI and is generally\n"
00060 "quite useless oths application will only work on Zap trunks.\n";
00061 
00062 STANDARD_LOCAL_USER;
00063 
00064 LOCAL_USER_DECL;
00065 
00066 static inline int zt_wait_event(int fd)
00067 {
00068    /* Avoid the silly zt_waitevent which ignores a bunch of events */
00069    int i,j=0;
00070    i = ZT_IOMUX_SIGEVENT;
00071    if (ioctl(fd, ZT_IOMUX, &i) == -1) return -1;
00072    if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
00073    return j;
00074 }
00075 
00076 static int flash_exec(struct ast_channel *chan, void *data)
00077 {
00078    int res = -1;
00079    int x;
00080    struct localuser *u;
00081    struct zt_params ztp;
00082    LOCAL_USER_ADD(u);
00083    if (!strcasecmp(chan->type, "Zap")) {
00084       memset(&ztp, 0, sizeof(ztp));
00085       res = ioctl(chan->fds[0], ZT_GET_PARAMS, &ztp);
00086       if (!res) {
00087          if (ztp.sigtype & __ZT_SIG_FXS) {
00088             x = ZT_FLASH;
00089             res = ioctl(chan->fds[0], ZT_HOOK, &x);
00090             if (!res || (errno == EINPROGRESS)) {
00091                if (res) {
00092                   /* Wait for the event to finish */
00093                   zt_wait_event(chan->fds[0]);
00094                }
00095                res = ast_safe_sleep(chan, 1000);
00096                if (option_verbose > 2)
00097                   ast_verbose(VERBOSE_PREFIX_3 "Flashed channel %s\n", chan->name);
00098             } else
00099                ast_log(LOG_WARNING, "Unable to flash channel %s: %s\n", chan->name, strerror(errno));
00100          } else
00101             ast_log(LOG_WARNING, "%s is not an FXO Channel\n", chan->name);
00102       } else
00103          ast_log(LOG_WARNING, "Unable to get parameters of %s: %s\n", chan->name, strerror(errno));
00104    } else
00105       ast_log(LOG_WARNING, "%s is not a Zap channel\n", chan->name);
00106    LOCAL_USER_REMOVE(u);
00107    return res;
00108 }
00109 
00110 int unload_module(void)
00111 {
00112    int res;
00113 
00114    res = ast_unregister_application(app);
00115 
00116    STANDARD_HANGUP_LOCALUSERS;
00117 
00118    return res;
00119 }
00120 
00121 int load_module(void)
00122 {
00123    return ast_register_application(app, flash_exec, synopsis, descrip);
00124 }
00125 
00126 char *description(void)
00127 {
00128    return tdesc;
00129 }
00130 
00131 int usecount(void)
00132 {
00133    int res;
00134    STANDARD_USECOUNT(res);
00135    return res;
00136 }
00137 
00138 char *key()
00139 {
00140    return ASTERISK_GPL_KEY;
00141 }

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