예제 #1
0
static int find_matching_endwhile(struct ast_channel *chan)
{
	struct ast_context *c;
	int res=-1;

	if (ast_rdlock_contexts()) {
		ast_log(LOG_ERROR, "Failed to lock contexts list\n");
		return -1;
	}

	for (c=ast_walk_contexts(NULL); c; c=ast_walk_contexts(c)) {
		struct ast_exten *e;

		if (!ast_rdlock_context(c)) {
			if (!strcmp(ast_get_context_name(c), chan->context)) {
				/* This is the matching context we want */
				int cur_priority = chan->priority + 1, level=1;

				for (e = find_matching_priority(c, chan->exten, cur_priority,
					S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL));
					e;
					e = find_matching_priority(c, chan->exten, ++cur_priority,
						S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL))) {
					if (!strcasecmp(ast_get_extension_app(e), "WHILE")) {
						level++;
					} else if (!strcasecmp(ast_get_extension_app(e), "ENDWHILE")) {
						level--;
					}

					if (level == 0) {
						res = cur_priority;
						break;
					}
				}
			}
			ast_unlock_context(c);
			if (res > 0) {
				break;
			}
		}
	}
	ast_unlock_contexts();
	return res;
}
예제 #2
0
static int _macro_exec(struct ast_channel *chan, const char *data, int exclusive)
{
	const char *s;
	char *tmp;
	char *cur, *rest;
	char *macro;
	char fullmacro[80];
	char varname[80];
	char runningapp[80], runningdata[1024];
	char *oldargs[MAX_ARGS + 1] = { NULL, };
	int argc, x;
	int res=0;
	char oldexten[256]="";
	int oldpriority, gosub_level = 0;
	char pc[80], depthc[12];
	char oldcontext[AST_MAX_CONTEXT] = "";
	const char *inhangupc;
	int offset, depth = 0, maxdepth = 7;
	int setmacrocontext=0;
	int autoloopflag, inhangup = 0;
	struct ast_str *tmp_subst = NULL;
  
	char *save_macro_exten;
	char *save_macro_context;
	char *save_macro_priority;
	char *save_macro_offset;
	struct ast_datastore *macro_store = ast_channel_datastore_find(chan, &macro_ds_info, NULL);

	if (ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "Macro() requires arguments. See \"core show application macro\" for help.\n");
		return -1;
	}

	do {
		if (macro_store) {
			break;
		}
		if (!(macro_store = ast_datastore_alloc(&macro_ds_info, NULL))) {
			ast_log(LOG_WARNING, "Unable to allocate new datastore.\n");
			break;
		}
		/* Just the existence of this datastore is enough. */
		macro_store->inheritance = DATASTORE_INHERIT_FOREVER;
		ast_channel_datastore_add(chan, macro_store);
	} while (0);

	/* does the user want a deeper rabbit hole? */
	ast_channel_lock(chan);
	if ((s = pbx_builtin_getvar_helper(chan, "MACRO_RECURSION"))) {
		sscanf(s, "%30d", &maxdepth);
	}
	
	/* Count how many levels deep the rabbit hole goes */
	if ((s = pbx_builtin_getvar_helper(chan, "MACRO_DEPTH"))) {
		sscanf(s, "%30d", &depth);
	}
	
	/* Used for detecting whether to return when a Macro is called from another Macro after hangup */
	if (strcmp(ast_channel_exten(chan), "h") == 0)
		pbx_builtin_setvar_helper(chan, "MACRO_IN_HANGUP", "1");
	
	if ((inhangupc = pbx_builtin_getvar_helper(chan, "MACRO_IN_HANGUP"))) {
		sscanf(inhangupc, "%30d", &inhangup);
	}
	ast_channel_unlock(chan);

	if (depth >= maxdepth) {
		ast_log(LOG_ERROR, "Macro():  possible infinite loop detected.  Returning early.\n");
		return 0;
	}
	snprintf(depthc, sizeof(depthc), "%d", depth + 1);

	tmp = ast_strdupa(data);
	rest = tmp;
	macro = strsep(&rest, ",");
	if (ast_strlen_zero(macro)) {
		ast_log(LOG_WARNING, "Invalid macro name specified\n");
		return 0;
	}

	snprintf(fullmacro, sizeof(fullmacro), "macro-%s", macro);
	if (!ast_exists_extension(chan, fullmacro, "s", 1,
		S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))) {
		if (!ast_context_find(fullmacro)) 
			ast_log(LOG_WARNING, "No such context '%s' for macro '%s'. Was called by %s@%s\n", fullmacro, macro, ast_channel_exten(chan), ast_channel_context(chan));
		else
			ast_log(LOG_WARNING, "Context '%s' for macro '%s' lacks 's' extension, priority 1\n", fullmacro, macro);
		return 0;
	}

	/* If we are to run the macro exclusively, take the mutex */
	if (exclusive) {
		ast_debug(1, "Locking macrolock for '%s'\n", fullmacro);
		ast_autoservice_start(chan);
		if (ast_context_lockmacro(fullmacro)) {
			ast_log(LOG_WARNING, "Failed to lock macro '%s' as in-use\n", fullmacro);
			ast_autoservice_stop(chan);
			return 0;
		}
		ast_autoservice_stop(chan);
	}

	if (!(tmp_subst = ast_str_create(16))) {
		return -1;
	}

	/* Save old info */
	oldpriority = ast_channel_priority(chan);
	ast_copy_string(oldexten, ast_channel_exten(chan), sizeof(oldexten));
	ast_copy_string(oldcontext, ast_channel_context(chan), sizeof(oldcontext));
	if (ast_strlen_zero(ast_channel_macrocontext(chan))) {
		ast_channel_macrocontext_set(chan, ast_channel_context(chan));
		ast_channel_macroexten_set(chan, ast_channel_exten(chan));
		ast_channel_macropriority_set(chan, ast_channel_priority(chan));
		setmacrocontext=1;
	}
	argc = 1;
	/* Save old macro variables */
	save_macro_exten = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_EXTEN"));
	pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", oldexten);

	save_macro_context = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_CONTEXT"));
	pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", oldcontext);

	save_macro_priority = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_PRIORITY"));
	snprintf(pc, sizeof(pc), "%d", oldpriority);
	pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", pc);
  
	save_macro_offset = ast_strdup(pbx_builtin_getvar_helper(chan, "MACRO_OFFSET"));
	pbx_builtin_setvar_helper(chan, "MACRO_OFFSET", NULL);

	pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);

	/* Setup environment for new run */
	ast_channel_exten_set(chan, "s");
	ast_channel_context_set(chan, fullmacro);
	ast_channel_priority_set(chan, 1);

	ast_channel_lock(chan);
	while((cur = strsep(&rest, ",")) && (argc < MAX_ARGS)) {
		const char *argp;
  		/* Save copy of old arguments if we're overwriting some, otherwise
	   	let them pass through to the other macro */
  		snprintf(varname, sizeof(varname), "ARG%d", argc);
		if ((argp = pbx_builtin_getvar_helper(chan, varname))) {
			oldargs[argc] = ast_strdup(argp);
		}
		pbx_builtin_setvar_helper(chan, varname, cur);
		argc++;
	}
	ast_channel_unlock(chan);
	autoloopflag = ast_test_flag(ast_channel_flags(chan), AST_FLAG_IN_AUTOLOOP);
	ast_set_flag(ast_channel_flags(chan), AST_FLAG_IN_AUTOLOOP);
	while (ast_exists_extension(chan, ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan),
		S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))) {
		struct ast_context *c;
		struct ast_exten *e;
		int foundx;
		runningapp[0] = '\0';
		runningdata[0] = '\0';

		/* What application will execute? */
		if (ast_rdlock_contexts()) {
			ast_log(LOG_WARNING, "Failed to lock contexts list\n");
		} else {
			for (c = ast_walk_contexts(NULL), e = NULL; c; c = ast_walk_contexts(c)) {
				if (!strcmp(ast_get_context_name(c), ast_channel_context(chan))) {
					if (ast_rdlock_context(c)) {
						ast_log(LOG_WARNING, "Unable to lock context?\n");
					} else {
						e = find_matching_priority(c, ast_channel_exten(chan), ast_channel_priority(chan),
							S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL));
						if (e) { /* This will only be undefined for pbx_realtime, which is majorly broken. */
							ast_copy_string(runningapp, ast_get_extension_app(e), sizeof(runningapp));
							ast_copy_string(runningdata, ast_get_extension_app_data(e), sizeof(runningdata));
						}
						ast_unlock_context(c);
					}
					break;
				}
			}
		}
		ast_unlock_contexts();

		/* Reset the macro depth, if it was changed in the last iteration */
		pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);

		res = ast_spawn_extension(chan, ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan),
			S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL),
			&foundx, 1);
		if (res) {
			/* Something bad happened, or a hangup has been requested. */
			if (((res >= '0') && (res <= '9')) || ((res >= 'A') && (res <= 'F')) ||
		    	(res == '*') || (res == '#')) {
				/* Just return result as to the previous application as if it had been dialed */
				ast_debug(1, "Oooh, got something to jump out with ('%c')!\n", res);
				break;
			}
			switch(res) {
			case MACRO_EXIT_RESULT:
				res = 0;
				goto out;
			default:
				ast_debug(2, "Spawn extension (%s,%s,%d) exited non-zero on '%s' in macro '%s'\n", ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan), ast_channel_name(chan), macro);
				ast_verb(2, "Spawn extension (%s, %s, %d) exited non-zero on '%s' in macro '%s'\n", ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan), ast_channel_name(chan), macro);
				goto out;
			}
		}

		ast_debug(1, "Executed application: %s\n", runningapp);

		if (!strcasecmp(runningapp, "GOSUB")) {
			gosub_level++;
			ast_debug(1, "Incrementing gosub_level\n");
		} else if (!strcasecmp(runningapp, "GOSUBIF")) {
			char *cond, *app_arg;
			char *app2;
			ast_str_substitute_variables(&tmp_subst, 0, chan, runningdata);
			app2 = ast_str_buffer(tmp_subst);
			cond = strsep(&app2, "?");
			app_arg = strsep(&app2, ":");
			if (pbx_checkcondition(cond)) {
				if (!ast_strlen_zero(app_arg)) {
					gosub_level++;
					ast_debug(1, "Incrementing gosub_level\n");
				}
			} else {
				if (!ast_strlen_zero(app2)) {
					gosub_level++;
					ast_debug(1, "Incrementing gosub_level\n");
				}
			}
		} else if (!strcasecmp(runningapp, "RETURN")) {
			gosub_level--;
			ast_debug(1, "Decrementing gosub_level\n");
		} else if (!strcasecmp(runningapp, "STACKPOP")) {
			gosub_level--;
			ast_debug(1, "Decrementing gosub_level\n");
		} else if (!strncasecmp(runningapp, "EXEC", 4)) {
			/* Must evaluate args to find actual app */
			char *tmp2, *tmp3 = NULL;
			ast_str_substitute_variables(&tmp_subst, 0, chan, runningdata);
			tmp2 = ast_str_buffer(tmp_subst);
			if (!strcasecmp(runningapp, "EXECIF")) {
				if ((tmp3 = strchr(tmp2, '|'))) {
					*tmp3++ = '\0';
				}
				if (!pbx_checkcondition(tmp2)) {
					tmp3 = NULL;
				}
			} else {
				tmp3 = tmp2;
			}

			if (tmp3) {
				ast_debug(1, "Last app: %s\n", tmp3);
			}

			if (tmp3 && !strncasecmp(tmp3, "GOSUB", 5)) {
				gosub_level++;
				ast_debug(1, "Incrementing gosub_level\n");
			} else if (tmp3 && !strncasecmp(tmp3, "RETURN", 6)) {
				gosub_level--;
				ast_debug(1, "Decrementing gosub_level\n");
			} else if (tmp3 && !strncasecmp(tmp3, "STACKPOP", 8)) {
				gosub_level--;
				ast_debug(1, "Decrementing gosub_level\n");
			}
		}

		if (gosub_level == 0 && strcasecmp(ast_channel_context(chan), fullmacro)) {
			ast_verb(2, "Channel '%s' jumping out of macro '%s'\n", ast_channel_name(chan), macro);
			break;
		}

		/* don't stop executing extensions when we're in "h" */
		if (ast_check_hangup(chan) && !inhangup) {
			ast_debug(1, "Extension %s, macroexten %s, priority %d returned normally even though call was hung up\n", ast_channel_exten(chan), ast_channel_macroexten(chan), ast_channel_priority(chan));
			goto out;
		}
		ast_channel_priority_set(chan, ast_channel_priority(chan) + 1);
  	}
	out:

	/* Don't let the channel change now. */
	ast_channel_lock(chan);

	/* Reset the depth back to what it was when the routine was entered (like if we called Macro recursively) */
	snprintf(depthc, sizeof(depthc), "%d", depth);
	pbx_builtin_setvar_helper(chan, "MACRO_DEPTH", depthc);
	ast_set2_flag(ast_channel_flags(chan), autoloopflag, AST_FLAG_IN_AUTOLOOP);

  	for (x = 1; x < argc; x++) {
  		/* Restore old arguments and delete ours */
		snprintf(varname, sizeof(varname), "ARG%d", x);
  		if (oldargs[x]) {
			pbx_builtin_setvar_helper(chan, varname, oldargs[x]);
			ast_free(oldargs[x]);
		} else {
			pbx_builtin_setvar_helper(chan, varname, NULL);
		}
  	}

	/* Restore macro variables */
	pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", save_macro_exten);
	pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", save_macro_context);
	pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", save_macro_priority);
	if (save_macro_exten)
		ast_free(save_macro_exten);
	if (save_macro_context)
		ast_free(save_macro_context);
	if (save_macro_priority)
		ast_free(save_macro_priority);

	if (setmacrocontext) {
		ast_channel_macrocontext_set(chan, "");
		ast_channel_macroexten_set(chan, "");
		ast_channel_macropriority_set(chan, 0);
	}

	if (!strcasecmp(ast_channel_context(chan), fullmacro)) {
		const char *offsets;

  		/* If we're leaving the macro normally, restore original information */
		ast_channel_priority_set(chan, oldpriority);
		ast_channel_context_set(chan, oldcontext);
		ast_channel_exten_set(chan, oldexten);
		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, "%30d", &offset) == 1) {
				if (ast_exists_extension(chan, ast_channel_context(chan), ast_channel_exten(chan),
					ast_channel_priority(chan) + offset + 1,
					S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))) {
					ast_channel_priority_set(chan, ast_channel_priority(chan) + offset);
				}
			}
		}
	}

	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;
		}
	}
	ast_channel_unlock(chan);
	ast_free(tmp_subst);

	return res;
}