2 * Asterisk -- A telephony toolkit for Linux.
6 * Copyright (C) 2003-2004, Digium, Inc.
8 * Mark Spencer <markster@digium.com>
10 * This program is free software, distributed under the terms of
11 * the GNU General Public License
14 #include <sys/types.h>
15 #include <asterisk/file.h>
16 #include <asterisk/logger.h>
17 #include <asterisk/channel.h>
18 #include <asterisk/pbx.h>
19 #include <asterisk/module.h>
20 #include <asterisk/options.h>
21 #include <asterisk/config.h>
22 #include <asterisk/utils.h>
23 #include <asterisk/lock.h>
31 static char *tdesc = "Extension Macros";
33 static char *descrip =
34 " Macro(macroname|arg1|arg2...): Executes a macro using the context\n"
35 "'macro-<macroname>', jumping to the 's' extension of that context and\n"
36 "executing each step, then returning when the steps end. The calling\n"
37 "extension, context, and priority are stored in ${MACRO_EXTEN}, \n"
38 "${MACRO_CONTEXT} and ${MACRO_PRIORITY} respectively. Arguments become\n"
39 "${ARG1}, ${ARG2}, etc in the macro context. Macro returns -1 if\n"
40 "any step in the macro returns -1, and 0 otherwise. If you Goto out\n"
41 "of the Macro context, the Macro will terminate and control will be return\n"
42 "at the location of the Goto. Otherwise if ${MACRO_OFFSET} is set at\n"
43 "termination, Macro will attempt to continue at priority\n"
44 "MACRO_OFFSET + N + 1 if such a step exists, and N + 1 otherwise.\n";
46 static char *if_descrip =
47 " MacroIf(<expr>?label_a[|arg1][:label_b[|arg1]]):\n"
48 "Executes macro defined in <label_a> if <expr> is true\n"
49 "(otherwise <label_b> if provided)\n";
51 static char *app = "Macro";
52 static char *if_app = "MacroIf";
54 static char *synopsis = "Macro Implementation";
55 static char *if_synopsis = "Conditional Macro Implementation";
61 static int macro_exec(struct ast_channel *chan, void *data)
68 char *oldargs[MAX_ARGS + 1] = { NULL, };
71 char oldexten[256]="";
74 char oldcontext[256] = "";
77 int setmacrocontext=0;
79 char *save_macro_exten;
80 char *save_macro_context;
81 char *save_macro_priority;
82 char *save_macro_offset;
85 if (!data || ast_strlen_zero(data)) {
86 ast_log(LOG_WARNING, "Invalid Macro incantation\n");
90 tmp = ast_strdupa((char *) data);
92 macro = strsep(&rest, "|");
93 if (!macro || ast_strlen_zero(macro)) {
94 ast_log(LOG_WARNING, "Invalid macro name specified\n");
97 snprintf(fullmacro, sizeof(fullmacro), "macro-%s", macro);
98 if (!ast_exists_extension(chan, fullmacro, "s", 1, chan->cid.cid_num)) {
99 if (!ast_context_find(fullmacro))
100 ast_log(LOG_WARNING, "No such context '%s' for macro '%s'\n", fullmacro, macro);
102 ast_log(LOG_WARNING, "Context '%s' for macro '%s' lacks 's' extension, priority 1\n", fullmacro, macro);
108 oldpriority = chan->priority;
109 strncpy(oldexten, chan->exten, sizeof(oldexten) - 1);
110 strncpy(oldcontext, chan->context, sizeof(oldcontext) - 1);
111 if (ast_strlen_zero(chan->macrocontext)) {
112 strncpy(chan->macrocontext, chan->context, sizeof(chan->macrocontext) - 1);
113 strncpy(chan->macroexten, chan->exten, sizeof(chan->macroexten) - 1);
114 chan->macropriority = chan->priority;
118 /* Save old macro variables */
119 save_macro_exten = pbx_builtin_getvar_helper(chan, "MACRO_EXTEN");
120 if (save_macro_exten) save_macro_exten = strdup(save_macro_exten);
121 pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", oldexten);
123 save_macro_context = pbx_builtin_getvar_helper(chan, "MACRO_CONTEXT");
124 if (save_macro_context) save_macro_context = strdup(save_macro_context);
125 pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", oldcontext);
127 save_macro_priority = pbx_builtin_getvar_helper(chan, "MACRO_PRIORITY");
128 if (save_macro_priority) save_macro_priority = strdup(save_macro_priority);
129 snprintf(pc, sizeof(pc), "%d", oldpriority);
130 pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", pc);
132 save_macro_offset = pbx_builtin_getvar_helper(chan, "MACRO_OFFSET");
133 if (save_macro_offset) save_macro_offset = strdup(save_macro_offset);
134 pbx_builtin_setvar_helper(chan, "MACRO_OFFSET", NULL);
136 /* Setup environment for new run */
137 chan->exten[0] = 's';
138 chan->exten[1] = '\0';
139 strncpy(chan->context, fullmacro, sizeof(chan->context) - 1);
142 while((cur = strsep(&rest, "|")) && (argc < MAX_ARGS)) {
143 /* Save copy of old arguments if we're overwriting some, otherwise
144 let them pass through to the other macro */
145 snprintf(varname, sizeof(varname), "ARG%d", argc);
146 oldargs[argc] = pbx_builtin_getvar_helper(chan, varname);
148 oldargs[argc] = strdup(oldargs[argc]);
149 pbx_builtin_setvar_helper(chan, varname, cur);
152 while(ast_exists_extension(chan, chan->context, chan->exten, chan->priority, chan->cid.cid_num)) {
153 if ((res = ast_spawn_extension(chan, chan->context, chan->exten, chan->priority, chan->cid.cid_num))) {
154 /* Something bad happened, or a hangup has been requested. */
155 if (((res >= '0') && (res <= '9')) || ((res >= 'A') && (res <= 'F'))) {
156 /* Just return result as to the previous application as if it had been dialed */
157 ast_log(LOG_DEBUG, "Oooh, got something to jump out with ('%c')!\n", res);
161 case AST_PBX_KEEPALIVE:
163 ast_log(LOG_DEBUG, "Spawn extension (%s,%s,%d) exited KEEPALIVE in macro %s on '%s'\n", chan->context, chan->exten, chan->priority, macro, chan->name);
164 else if (option_verbose > 1)
165 ast_verbose( VERBOSE_PREFIX_2 "Spawn extension (%s, %s, %d) exited KEEPALIVE in macro '%s' on '%s'\n", chan->context, chan->exten, chan->priority, macro, chan->name);
170 ast_log(LOG_DEBUG, "Spawn extension (%s,%s,%d) exited non-zero on '%s' in macro '%s'\n", chan->context, chan->exten, chan->priority, chan->name, macro);
171 else if (option_verbose > 1)
172 ast_verbose( VERBOSE_PREFIX_2 "Spawn extension (%s, %s, %d) exited non-zero on '%s' in macro '%s'\n", chan->context, chan->exten, chan->priority, chan->name, macro);
176 if (strcasecmp(chan->context, fullmacro)) {
177 if (option_verbose > 1)
178 ast_verbose(VERBOSE_PREFIX_2 "Channel '%s' jumping out of macro '%s'\n", chan->name, macro);
181 /* don't stop executing extensions when we're in "h" */
182 if (chan->_softhangup && strcasecmp(oldexten,"h")) {
183 ast_log(LOG_DEBUG, "Extension %s, priority %d returned normally even though call was hung up\n",
184 chan->exten, chan->priority);
190 for (x=1;x<argc;x++) {
191 /* Restore old arguments and delete ours */
192 snprintf(varname, sizeof(varname), "ARG%d", x);
194 pbx_builtin_setvar_helper(chan, varname, oldargs[x]);
197 pbx_builtin_setvar_helper(chan, varname, NULL);
201 /* Restore macro variables */
202 pbx_builtin_setvar_helper(chan, "MACRO_EXTEN", save_macro_exten);
203 if (save_macro_exten) free(save_macro_exten);
204 pbx_builtin_setvar_helper(chan, "MACRO_CONTEXT", save_macro_context);
205 if (save_macro_context) free(save_macro_context);
206 pbx_builtin_setvar_helper(chan, "MACRO_PRIORITY", save_macro_priority);
207 if (save_macro_priority) free(save_macro_priority);
208 if (setmacrocontext) {
209 chan->macrocontext[0] = '\0';
210 chan->macroexten[0] = '\0';
211 chan->macropriority = 0;
214 if (!strcasecmp(chan->context, fullmacro)) {
215 /* If we're leaving the macro normally, restore original information */
216 chan->priority = oldpriority;
217 strncpy(chan->context, oldcontext, sizeof(chan->context) - 1);
218 if (!(chan->_softhangup & AST_SOFTHANGUP_ASYNCGOTO)) {
219 /* Copy the extension, so long as we're not in softhangup, where we could be given an asyncgoto */
220 strncpy(chan->exten, oldexten, sizeof(chan->exten) - 1);
221 if ((offsets = pbx_builtin_getvar_helper(chan, "MACRO_OFFSET"))) {
222 /* Handle macro offset if it's set by checking the availability of step n + offset + 1, otherwise continue
223 normally if there is any problem */
224 if (sscanf(offsets, "%d", &offset) == 1) {
225 if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + offset + 1, chan->cid.cid_num)) {
226 chan->priority += offset;
233 pbx_builtin_setvar_helper(chan, "MACRO_OFFSET", save_macro_offset);
234 if (save_macro_offset) free(save_macro_offset);
235 LOCAL_USER_REMOVE(u);
239 static int macroif_exec(struct ast_channel *chan, void *data)
241 char *expr = NULL, *label_a = NULL, *label_b = NULL;
244 if((expr = ast_strdupa((char *) data))) {
245 if ((label_a = strchr(expr, '?'))) {
248 if ((label_b = strchr(label_a, ':'))) {
253 macro_exec(chan, label_a);
255 macro_exec(chan, label_b);
258 ast_log(LOG_WARNING, "Invalid Syntax.\n");
260 ast_log(LOG_ERROR, "Out of Memory!\n");
264 int unload_module(void)
266 STANDARD_HANGUP_LOCALUSERS;
267 ast_unregister_application(if_app);
268 return ast_unregister_application(app);
271 int load_module(void)
273 ast_register_application(if_app, macroif_exec, if_synopsis, if_descrip);
274 return ast_register_application(app, macro_exec, synopsis, descrip);
277 char *description(void)
285 STANDARD_USECOUNT(res);
291 return ASTERISK_GPL_KEY;