![seanbright](/assets/img/avatar_default.png)
app_voicemail and app_queue. git-svn-id: http://svn.digium.com/svn/asterisk/trunk@137055 f38db490-d61c-443f-a65b-d21fe96a405b
536 lines
18 KiB
C
536 lines
18 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Dial plan macro Implementation
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/config.h"
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#include "asterisk/utils.h"
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#include "asterisk/lock.h"
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#define MAX_ARGS 80
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/* special result value used to force macro exit */
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#define MACRO_EXIT_RESULT 1024
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static char *descrip =
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" Macro(macroname,arg1,arg2...): Executes a macro using the context\n"
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"'macro-<macroname>', jumping to the 's' extension of that context and\n"
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"executing each step, then returning when the steps end. \n"
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"The calling extension, context, and priority are stored in ${MACRO_EXTEN}, \n"
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"${MACRO_CONTEXT} and ${MACRO_PRIORITY} respectively. Arguments become\n"
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"${ARG1}, ${ARG2}, etc in the macro context.\n"
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"If you Goto out of the Macro context, the Macro will terminate and control\n"
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"will be returned at the location of the Goto.\n"
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"If ${MACRO_OFFSET} is set at termination, Macro will attempt to continue\n"
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"at priority MACRO_OFFSET + N + 1 if such a step exists, and N + 1 otherwise.\n"
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"Extensions: While a macro is being executed, it becomes the current context.\n"
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" This means that if a hangup occurs, for instance, that the macro\n"
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" will be searched for an 'h' extension, NOT the context from which\n"
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" the macro was called. So, make sure to define all appropriate\n"
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" extensions in your macro! (Note: AEL does not use macros)\n"
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"WARNING: Because of the way Macro is implemented (it executes the priorities\n"
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" contained within it via sub-engine), and a fixed per-thread\n"
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" memory stack allowance, macros are limited to 7 levels\n"
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" of nesting (macro calling macro calling macro, etc.); It\n"
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" may be possible that stack-intensive applications in deeply nested macros\n"
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" could cause asterisk to crash earlier than this limit. It is advised that\n"
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" if you need to deeply nest macro calls, that you use the Gosub application\n"
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" (now allows arguments like a Macro) with explict Return() calls instead.\n";
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static char *if_descrip =
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" MacroIf(<expr>?macroname_a[,arg1][:macroname_b[,arg1]])\n"
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"Executes macro defined in <macroname_a> if <expr> is true\n"
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"(otherwise <macroname_b> if provided)\n"
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"Arguments and return values as in application Macro()\n";
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static char *exclusive_descrip =
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" MacroExclusive(macroname,arg1,arg2...):\n"
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"Executes macro defined in the context 'macro-macroname'\n"
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"Only one call at a time may run the macro.\n"
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"(we'll wait if another call is busy executing in the Macro)\n"
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"Arguments and return values as in application Macro()\n";
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static char *exit_descrip =
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" MacroExit():\n"
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"Causes the currently running macro to exit as if it had\n"
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"ended normally by running out of priorities to execute.\n"
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"If used outside a macro, will likely cause unexpected\n"
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"behavior.\n";
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static char *app = "Macro";
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static char *if_app = "MacroIf";
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static char *exclusive_app = "MacroExclusive";
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static char *exit_app = "MacroExit";
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static char *synopsis = "Macro Implementation";
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static char *if_synopsis = "Conditional Macro Implementation";
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static char *exclusive_synopsis = "Exclusive Macro Implementation";
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static char *exit_synopsis = "Exit From Macro";
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static struct ast_exten *find_matching_priority(struct ast_context *c, const char *exten, int priority, const char *callerid)
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{
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struct ast_exten *e;
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struct ast_include *i;
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struct ast_context *c2;
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for (e=ast_walk_context_extensions(c, NULL); e; e=ast_walk_context_extensions(c, e)) {
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if (ast_extension_match(ast_get_extension_name(e), exten)) {
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int needmatch = ast_get_extension_matchcid(e);
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if ((needmatch && ast_extension_match(ast_get_extension_cidmatch(e), callerid)) ||
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(!needmatch)) {
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/* This is the matching extension we want */
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struct ast_exten *p;
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for (p=ast_walk_extension_priorities(e, NULL); p; p=ast_walk_extension_priorities(e, p)) {
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if (priority != ast_get_extension_priority(p))
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continue;
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return p;
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}
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}
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}
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}
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/* No match; run through includes */
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for (i=ast_walk_context_includes(c, NULL); i; i=ast_walk_context_includes(c, i)) {
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for (c2=ast_walk_contexts(NULL); c2; c2=ast_walk_contexts(c2)) {
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if (!strcmp(ast_get_context_name(c2), ast_get_include_name(i))) {
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e = find_matching_priority(c2, exten, priority, callerid);
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if (e)
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return e;
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}
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}
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}
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return NULL;
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}
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static int _macro_exec(struct ast_channel *chan, void *data, int exclusive)
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{
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const char *s;
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char *tmp;
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char *cur, *rest;
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char *macro;
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char fullmacro[80];
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char varname[80];
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char runningapp[80], runningdata[1024];
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char *oldargs[MAX_ARGS + 1] = { NULL, };
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int argc, x;
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int res=0;
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char oldexten[256]="";
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int oldpriority, gosub_level = 0;
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char pc[80], depthc[12];
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char oldcontext[AST_MAX_CONTEXT] = "";
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const char *inhangupc;
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int offset, depth = 0, maxdepth = 7;
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int setmacrocontext=0;
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int autoloopflag, dead = 0, inhangup = 0;
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char *save_macro_exten;
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char *save_macro_context;
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char *save_macro_priority;
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char *save_macro_offset;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Macro() requires arguments. See \"core show application macro\" for help.\n");
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return -1;
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}
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/* does the user want a deeper rabbit hole? */
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ast_channel_lock(chan);
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if ((s = pbx_builtin_getvar_helper(chan, "MACRO_RECURSION"))) {
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sscanf(s, "%d", &maxdepth);
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}
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/* Count how many levels deep the rabbit hole goes */
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if ((s = pbx_builtin_getvar_helper(chan, "MACRO_DEPTH"))) {
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sscanf(s, "%d", &depth);
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}
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/* Used for detecting whether to return when a Macro is called from another Macro after hangup */
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if (strcmp(chan->exten, "h") == 0)
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pbx_builtin_setvar_helper(chan, "MACRO_IN_HANGUP", "1");
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if ((inhangupc = pbx_builtin_getvar_helper(chan, "MACRO_IN_HANGUP"))) {
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sscanf(inhangupc, "%d", &inhangup);
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}
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ast_channel_unlock(chan);
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if (depth >= maxdepth) {
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ast_log(LOG_ERROR, "Macro(): possible infinite loop detected. Returning early.\n");
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return 0;
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}
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snprintf(depthc, sizeof(depthc), "%d", depth + 1);
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pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);
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tmp = ast_strdupa(data);
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rest = tmp;
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macro = strsep(&rest, ",");
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if (ast_strlen_zero(macro)) {
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ast_log(LOG_WARNING, "Invalid macro name specified\n");
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return 0;
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}
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snprintf(fullmacro, sizeof(fullmacro), "macro-%s", macro);
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if (!ast_exists_extension(chan, fullmacro, "s", 1, chan->cid.cid_num)) {
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if (!ast_context_find(fullmacro))
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ast_log(LOG_WARNING, "No such context '%s' for macro '%s'\n", fullmacro, macro);
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else
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ast_log(LOG_WARNING, "Context '%s' for macro '%s' lacks 's' extension, priority 1\n", fullmacro, macro);
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return 0;
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}
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/* If we are to run the macro exclusively, take the mutex */
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if (exclusive) {
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ast_debug(1, "Locking macrolock for '%s'\n", fullmacro);
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ast_autoservice_start(chan);
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if (ast_context_lockmacro(fullmacro)) {
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ast_log(LOG_WARNING, "Failed to lock macro '%s' as in-use\n", fullmacro);
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ast_autoservice_stop(chan);
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return 0;
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}
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ast_autoservice_stop(chan);
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}
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/* Save old info */
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oldpriority = chan->priority;
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ast_copy_string(oldexten, chan->exten, sizeof(oldexten));
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ast_copy_string(oldcontext, chan->context, sizeof(oldcontext));
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if (ast_strlen_zero(chan->macrocontext)) {
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ast_copy_string(chan->macrocontext, chan->context, sizeof(chan->macrocontext));
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ast_copy_string(chan->macroexten, chan->exten, sizeof(chan->macroexten));
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chan->macropriority = chan->priority;
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setmacrocontext=1;
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}
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argc = 1;
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/* Save old macro variables */
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save_macro_exten = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_EXTEN"));
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pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", oldexten);
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save_macro_context = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_CONTEXT"));
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pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", oldcontext);
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save_macro_priority = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_PRIORITY"));
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snprintf(pc, sizeof(pc), "%d", oldpriority);
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pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", pc);
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save_macro_offset = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_OFFSET"));
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pbx_builtin_setvar_helper(chan, "MACRO_OFFSET", NULL);
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/* Setup environment for new run */
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chan->exten[0] = 's';
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chan->exten[1] = '\0';
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ast_copy_string(chan->context, fullmacro, sizeof(chan->context));
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chan->priority = 1;
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ast_channel_lock(chan);
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while((cur = strsep(&rest, ",")) && (argc < MAX_ARGS)) {
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const char *argp;
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/* Save copy of old arguments if we're overwriting some, otherwise
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let them pass through to the other macro */
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snprintf(varname, sizeof(varname), "ARG%d", argc);
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if ((argp = pbx_builtin_getvar_helper(chan, varname))) {
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oldargs[argc] = ast_strdup(argp);
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}
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pbx_builtin_setvar_helper(chan, varname, cur);
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argc++;
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}
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ast_channel_unlock(chan);
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autoloopflag = ast_test_flag(chan, AST_FLAG_IN_AUTOLOOP);
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ast_set_flag(chan, AST_FLAG_IN_AUTOLOOP);
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while(ast_exists_extension(chan, chan->context, chan->exten, chan->priority, chan->cid.cid_num)) {
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struct ast_context *c;
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struct ast_exten *e;
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int foundx;
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runningapp[0] = '\0';
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runningdata[0] = '\0';
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/* What application will execute? */
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if (ast_rdlock_contexts()) {
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ast_log(LOG_WARNING, "Failed to lock contexts list\n");
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} else {
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for (c = ast_walk_contexts(NULL), e = NULL; c; c = ast_walk_contexts(c)) {
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if (!strcmp(ast_get_context_name(c), chan->context)) {
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if (ast_rdlock_context(c)) {
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ast_log(LOG_WARNING, "Unable to lock context?\n");
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} else {
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e = find_matching_priority(c, chan->exten, chan->priority, chan->cid.cid_num);
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if (e) { /* This will only be undefined for pbx_realtime, which is majorly broken. */
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ast_copy_string(runningapp, ast_get_extension_app(e), sizeof(runningapp));
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ast_copy_string(runningdata, ast_get_extension_app_data(e), sizeof(runningdata));
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}
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ast_unlock_context(c);
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}
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break;
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}
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}
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}
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ast_unlock_contexts();
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/* Reset the macro depth, if it was changed in the last iteration */
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pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);
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if ((res = ast_spawn_extension(chan, chan->context, chan->exten, chan->priority, chan->cid.cid_num, &foundx,1))) {
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/* Something bad happened, or a hangup has been requested. */
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if (((res >= '0') && (res <= '9')) || ((res >= 'A') && (res <= 'F')) ||
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(res == '*') || (res == '#')) {
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/* Just return result as to the previous application as if it had been dialed */
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ast_debug(1, "Oooh, got something to jump out with ('%c')!\n", res);
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break;
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}
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switch(res) {
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case MACRO_EXIT_RESULT:
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res = 0;
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goto out;
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case AST_PBX_KEEPALIVE:
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ast_debug(2, "Spawn extension (%s,%s,%d) exited KEEPALIVE in macro %s on '%s'\n", chan->context, chan->exten, chan->priority, macro, chan->name);
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ast_verb(2, "Spawn extension (%s, %s, %d) exited KEEPALIVE in macro '%s' on '%s'\n", chan->context, chan->exten, chan->priority, macro, chan->name);
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goto out;
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break;
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default:
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ast_debug(2, "Spawn extension (%s,%s,%d) exited non-zero on '%s' in macro '%s'\n", chan->context, chan->exten, chan->priority, chan->name, macro);
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ast_verb(2, "Spawn extension (%s, %s, %d) exited non-zero on '%s' in macro '%s'\n", chan->context, chan->exten, chan->priority, chan->name, macro);
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dead = 1;
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goto out;
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}
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}
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ast_debug(1, "Executed application: %s\n", runningapp);
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if (!strcasecmp(runningapp, "GOSUB")) {
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gosub_level++;
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ast_debug(1, "Incrementing gosub_level\n");
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} else if (!strcasecmp(runningapp, "GOSUBIF")) {
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char tmp2[1024], *cond, *app_arg, *app2 = tmp2;
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pbx_substitute_variables_helper(chan, runningdata, tmp2, sizeof(tmp2) - 1);
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cond = strsep(&app2, "?");
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app_arg = strsep(&app2, ":");
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if (pbx_checkcondition(cond)) {
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if (!ast_strlen_zero(app_arg)) {
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gosub_level++;
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ast_debug(1, "Incrementing gosub_level\n");
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}
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} else {
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if (!ast_strlen_zero(app2)) {
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gosub_level++;
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ast_debug(1, "Incrementing gosub_level\n");
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}
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}
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} else if (!strcasecmp(runningapp, "RETURN")) {
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gosub_level--;
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ast_debug(1, "Decrementing gosub_level\n");
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} else if (!strcasecmp(runningapp, "STACKPOP")) {
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gosub_level--;
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ast_debug(1, "Decrementing gosub_level\n");
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} else if (!strncasecmp(runningapp, "EXEC", 4)) {
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/* Must evaluate args to find actual app */
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char tmp2[1024], *tmp3 = NULL;
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pbx_substitute_variables_helper(chan, runningdata, tmp2, sizeof(tmp2) - 1);
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if (!strcasecmp(runningapp, "EXECIF")) {
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tmp3 = strchr(tmp2, '|');
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if (tmp3)
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*tmp3++ = '\0';
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if (!pbx_checkcondition(tmp2))
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tmp3 = NULL;
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} else
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tmp3 = tmp2;
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if (tmp3)
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ast_debug(1, "Last app: %s\n", tmp3);
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if (tmp3 && !strncasecmp(tmp3, "GOSUB", 5)) {
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gosub_level++;
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ast_debug(1, "Incrementing gosub_level\n");
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} else if (tmp3 && !strncasecmp(tmp3, "RETURN", 6)) {
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gosub_level--;
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ast_debug(1, "Decrementing gosub_level\n");
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} else if (tmp3 && !strncasecmp(tmp3, "STACKPOP", 8)) {
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gosub_level--;
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ast_debug(1, "Decrementing gosub_level\n");
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}
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}
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if (gosub_level == 0 && strcasecmp(chan->context, fullmacro)) {
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ast_verb(2, "Channel '%s' jumping out of macro '%s'\n", chan->name, macro);
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break;
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}
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/* don't stop executing extensions when we're in "h" */
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if (ast_check_hangup(chan) && !inhangup) {
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ast_debug(1, "Extension %s, macroexten %s, priority %d returned normally even though call was hung up\n", chan->exten, chan->macroexten, chan->priority);
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goto out;
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}
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chan->priority++;
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}
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out:
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/* Reset the depth back to what it was when the routine was entered (like if we called Macro recursively) */
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snprintf(depthc, sizeof(depthc), "%d", depth);
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if (!dead) {
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pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);
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ast_set2_flag(chan, autoloopflag, AST_FLAG_IN_AUTOLOOP);
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}
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for (x = 1; x < argc; x++) {
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/* Restore old arguments and delete ours */
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snprintf(varname, sizeof(varname), "ARG%d", x);
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if (oldargs[x]) {
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if (!dead)
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pbx_builtin_setvar_helper(chan, varname, oldargs[x]);
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ast_free(oldargs[x]);
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} else if (!dead) {
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pbx_builtin_setvar_helper(chan, varname, NULL);
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}
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}
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/* Restore macro variables */
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if (!dead) {
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pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", save_macro_exten);
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pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", save_macro_context);
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pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", save_macro_priority);
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}
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if (save_macro_exten)
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ast_free(save_macro_exten);
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if (save_macro_context)
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ast_free(save_macro_context);
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if (save_macro_priority)
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ast_free(save_macro_priority);
|
|
|
|
if (!dead && setmacrocontext) {
|
|
chan->macrocontext[0] = '\0';
|
|
chan->macroexten[0] = '\0';
|
|
chan->macropriority = 0;
|
|
}
|
|
|
|
if (!dead && !strcasecmp(chan->context, fullmacro)) {
|
|
/* If we're leaving the macro normally, restore original information */
|
|
chan->priority = oldpriority;
|
|
ast_copy_string(chan->context, oldcontext, sizeof(chan->context));
|
|
if (!(ast_check_hangup(chan) & AST_SOFTHANGUP_ASYNCGOTO)) {
|
|
/* Copy the extension, so long as we're not in softhangup, where we could be given an asyncgoto */
|
|
const char *offsets;
|
|
ast_copy_string(chan->exten, oldexten, sizeof(chan->exten));
|
|
ast_channel_lock(chan);
|
|
if ((offsets = pbx_builtin_getvar_helper(chan, "MACRO_OFFSET"))) {
|
|
/* Handle macro offset if it's set by checking the availability of step n + offset + 1, otherwise continue
|
|
normally if there is any problem */
|
|
if (sscanf(offsets, "%d", &offset) == 1) {
|
|
if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + offset + 1, chan->cid.cid_num)) {
|
|
chan->priority += offset;
|
|
}
|
|
}
|
|
}
|
|
ast_channel_unlock(chan);
|
|
}
|
|
}
|
|
|
|
if (!dead)
|
|
pbx_builtin_setvar_helper(chan, "MACRO_OFFSET", save_macro_offset);
|
|
if (save_macro_offset)
|
|
ast_free(save_macro_offset);
|
|
|
|
/* Unlock the macro */
|
|
if (exclusive) {
|
|
ast_debug(1, "Unlocking macrolock for '%s'\n", fullmacro);
|
|
if (ast_context_unlockmacro(fullmacro)) {
|
|
ast_log(LOG_ERROR, "Failed to unlock macro '%s' - that isn't good\n", fullmacro);
|
|
res = 0;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int macro_exec(struct ast_channel *chan, void *data)
|
|
{
|
|
return _macro_exec(chan, data, 0);
|
|
}
|
|
|
|
static int macroexclusive_exec(struct ast_channel *chan, void *data)
|
|
{
|
|
return _macro_exec(chan, data, 1);
|
|
}
|
|
|
|
static int macroif_exec(struct ast_channel *chan, void *data)
|
|
{
|
|
char *expr = NULL, *label_a = NULL, *label_b = NULL;
|
|
int res = 0;
|
|
|
|
if (!(expr = ast_strdupa(data)))
|
|
return -1;
|
|
|
|
if ((label_a = strchr(expr, '?'))) {
|
|
*label_a = '\0';
|
|
label_a++;
|
|
if ((label_b = strchr(label_a, ':'))) {
|
|
*label_b = '\0';
|
|
label_b++;
|
|
}
|
|
if (pbx_checkcondition(expr))
|
|
res = macro_exec(chan, label_a);
|
|
else if (label_b)
|
|
res = macro_exec(chan, label_b);
|
|
} else
|
|
ast_log(LOG_WARNING, "Invalid Syntax.\n");
|
|
|
|
return res;
|
|
}
|
|
|
|
static int macro_exit_exec(struct ast_channel *chan, void *data)
|
|
{
|
|
return MACRO_EXIT_RESULT;
|
|
}
|
|
|
|
static int unload_module(void)
|
|
{
|
|
int res;
|
|
|
|
res = ast_unregister_application(if_app);
|
|
res |= ast_unregister_application(exit_app);
|
|
res |= ast_unregister_application(app);
|
|
res |= ast_unregister_application(exclusive_app);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int load_module(void)
|
|
{
|
|
int res;
|
|
|
|
res = ast_register_application(exit_app, macro_exit_exec, exit_synopsis, exit_descrip);
|
|
res |= ast_register_application(if_app, macroif_exec, if_synopsis, if_descrip);
|
|
res |= ast_register_application(exclusive_app, macroexclusive_exec, exclusive_synopsis, exclusive_descrip);
|
|
res |= ast_register_application(app, macro_exec, synopsis, descrip);
|
|
|
|
return res;
|
|
}
|
|
|
|
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Extension Macros");
|