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00030 #include "asterisk.h"
00031
00032 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 229970 $")
00033
00034 #include <sys/ioctl.h>
00035
00036 #include "asterisk/lock.h"
00037 #include "asterisk/file.h"
00038 #include "asterisk/channel.h"
00039 #include "asterisk/pbx.h"
00040 #include "asterisk/module.h"
00041 #include "asterisk/app.h"
00042 #include "asterisk/devicestate.h"
00043
00044 static const char app[] = "ChanIsAvail";
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00098 static int chanavail_exec(struct ast_channel *chan, const char *data)
00099 {
00100 int inuse=-1, option_state=0, string_compare=0, option_all_avail=0;
00101 int status;
00102 char *info, tmp[512], trychan[512], *peers, *tech, *number, *rest, *cur;
00103 struct ast_str *tmp_availchan = ast_str_alloca(2048);
00104 struct ast_str *tmp_availorig = ast_str_alloca(2048);
00105 struct ast_str *tmp_availstat = ast_str_alloca(2048);
00106 struct ast_str *tmp_availcause = ast_str_alloca(2048);
00107 struct ast_channel *tempchan;
00108 AST_DECLARE_APP_ARGS(args,
00109 AST_APP_ARG(reqchans);
00110 AST_APP_ARG(options);
00111 );
00112
00113 if (ast_strlen_zero(data)) {
00114 ast_log(LOG_WARNING, "ChanIsAvail requires an argument (DAHDI/1&DAHDI/2)\n");
00115 return -1;
00116 }
00117
00118 info = ast_strdupa(data);
00119
00120 AST_STANDARD_APP_ARGS(args, info);
00121
00122 if (args.options) {
00123 if (strchr(args.options, 'a')) {
00124 option_all_avail = 1;
00125 }
00126 if (strchr(args.options, 's')) {
00127 option_state = 1;
00128 }
00129 if (strchr(args.options, 't')) {
00130 string_compare = 1;
00131 }
00132 }
00133 peers = args.reqchans;
00134 if (peers) {
00135 cur = peers;
00136 do {
00137
00138 rest = strchr(cur, '&');
00139 if (rest) {
00140 *rest = 0;
00141 rest++;
00142 }
00143 tech = cur;
00144 number = strchr(tech, '/');
00145 if (!number) {
00146 ast_log(LOG_WARNING, "ChanIsAvail argument takes format ([technology]/[device])\n");
00147 return -1;
00148 }
00149 *number = '\0';
00150 number++;
00151
00152 if (string_compare) {
00153
00154
00155
00156 snprintf(trychan, sizeof(trychan), "%s/%s",cur,number);
00157 status = inuse = ast_parse_device_state(trychan);
00158 } else if (option_state) {
00159
00160
00161
00162
00163 snprintf(trychan, sizeof(trychan), "%s/%s",cur,number);
00164 status = inuse = ast_device_state(trychan);
00165 }
00166 snprintf(tmp, sizeof(tmp), "%d", status);
00167 ast_str_append(&tmp_availstat, 0, "%s%s", ast_str_strlen(tmp_availstat) ? "&" : "", tmp);
00168 if ((inuse <= 1) && (tempchan = ast_request(tech, chan->nativeformats, chan, number, &status))) {
00169 ast_str_append(&tmp_availchan, 0, "%s%s", ast_str_strlen(tmp_availchan) ? "&" : "", tempchan->name);
00170
00171 snprintf(tmp, sizeof(tmp), "%s/%s", tech, number);
00172 ast_str_append(&tmp_availorig, 0, "%s%s", ast_str_strlen(tmp_availorig) ? "&" : "", tmp);
00173
00174 snprintf(tmp, sizeof(tmp), "%d", status);
00175 ast_str_append(&tmp_availcause, 0, "%s%s", ast_str_strlen(tmp_availcause) ? "&" : "", tmp);
00176
00177 ast_hangup(tempchan);
00178 tempchan = NULL;
00179
00180 if (!option_all_avail) {
00181 break;
00182 }
00183 }
00184 cur = rest;
00185 } while (cur);
00186 }
00187
00188 pbx_builtin_setvar_helper(chan, "AVAILCHAN", ast_str_buffer(tmp_availchan));
00189
00190 pbx_builtin_setvar_helper(chan, "AVAILORIGCHAN", ast_str_buffer(tmp_availorig));
00191 pbx_builtin_setvar_helper(chan, "AVAILSTATUS", ast_str_buffer(tmp_availstat));
00192 pbx_builtin_setvar_helper(chan, "AVAILCAUSECODE", ast_str_buffer(tmp_availcause));
00193
00194 return 0;
00195 }
00196
00197 static int unload_module(void)
00198 {
00199 return ast_unregister_application(app);
00200 }
00201
00202 static int load_module(void)
00203 {
00204 return ast_register_application_xml(app, chanavail_exec) ?
00205 AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
00206 }
00207
00208 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Check channel availability");