include "logger.h" and errno.h from asterisk.h - usage shows that they
[asterisk/asterisk.git] / apps / app_directed_pickup.c
index e75e34a..b823f58 100644 (file)
  *
  * \brief Directed Call Pickup Support
  *
- * \author Joshua Colp <jcolp@asterlink.com>
+ * \author Joshua Colp <jcolp@digium.com>
  *
  * \ingroup applications
  */
 
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
 #include "asterisk.h"
 
 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #include "asterisk/file.h"
-#include "asterisk/logger.h"
 #include "asterisk/channel.h"
 #include "asterisk/pbx.h"
 #include "asterisk/module.h"
 #include "asterisk/lock.h"
 #include "asterisk/app.h"
+#include "asterisk/options.h"
+#include "asterisk/features.h"
+
+#define PICKUPMARK "PICKUPMARK"
 
 static const char *app = "Pickup";
 static const char *synopsis = "Directed Call Pickup";
 static const char *descrip =
-"  Pickup(extension[@context][&extension2@context...]): This application can pickup any ringing channel\n"
-"that is calling the specified extension. If no context is specified, the current\n"
-"context will be used.\n";
-
-LOCAL_USER_DECL;
-
-static int pickup_exec(struct ast_channel *chan, void *data)
+"  Pickup([extension[@context][&extension2@[context]...]]):  This application can\n"
+"pickup any ringing channel that is calling the specified extension.  If no\n"
+"context is specified, the current context will be used. If you use the special\n"
+"string \"PICKUPMARK\" for the context parameter, for example 10@PICKUPMARK,\n"
+"this application tries to find a channel which has defined a ${PICKUPMARK}\n"
+"channel variable with the same value as \"extension\" (in this example, \"10\").\n"
+"When no parameter is specified, the application will pickup a channel matching\n"
+"the pickup group of the active channel.";
+
+/* Perform actual pickup between two channels */
+static int pickup_do(struct ast_channel *chan, struct ast_channel *target)
 {
        int res = 0;
-       struct localuser *u = NULL;
-       struct ast_channel *origin = NULL, *target = NULL;
-       char *tmp = NULL, *exten = NULL, *context = NULL, *rest=data;
-       char workspace[256] = "";
 
-       if (ast_strlen_zero(data)) {
-               ast_log(LOG_WARNING, "Pickup requires an argument (extension) !\n");
-               return -1;      
+       ast_debug(1, "Call pickup on '%s' by '%s'\n", target->name, chan->name);
+
+       if ((res = ast_answer(chan))) {
+               ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan->name);
+               return -1;
        }
 
-       LOCAL_USER_ADD(u);
-       
-       while (!target && (exten = rest) ) {
-               res = 0;
-               rest = strchr(exten, '&');
-               if (rest)
-                       *rest++ = 0;
-
-               /* Get the extension and context if present */
-               context = strchr(exten, '@');
-               if (context)
-                       *context++ = '\0';
+       if ((res = ast_queue_control(chan, AST_CONTROL_ANSWER))) {
+               ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan->name);
+               return -1;
+       }
 
-               /* Find a channel to pickup */
-               origin = ast_get_channel_by_exten_locked(exten, context);
-               if (origin) {
-                       ast_cdr_getvar(origin->cdr, "dstchannel", &tmp, workspace,
-                                       sizeof(workspace), 0, 0);
-                       if (tmp) {
-                               /* We have a possible channel... now we need to find it! */
-                               target = ast_get_channel_by_name_locked(tmp);
-                       } else {
-                               ast_log(LOG_NOTICE, "No target channel found for %s.\n", exten);
-                               res = -1;
-                       }
-                       ast_mutex_unlock(&origin->lock);
+       if ((res = ast_channel_masquerade(target, chan))) {
+               ast_log(LOG_WARNING, "Unable to masquerade '%s' into '%s'\n", chan->name, target->name);
+               return -1;
+       }
 
-               } else {
-                       ast_log(LOG_DEBUG, "No originating channel found.\n");
+       return res;
+}
+
+/* Helper function that determines whether a channel is capable of being picked up */
+static int can_pickup(struct ast_channel *chan)
+{
+       if (!chan->pbx && (chan->_state == AST_STATE_RINGING || chan->_state == AST_STATE_RING))
+               return 1;
+       else
+               return 0;
+}
+
+/* Attempt to pick up specified extension with context */
+static int pickup_by_exten(struct ast_channel *chan, const char *exten, const char *context)
+{
+       int res = -1;
+       struct ast_channel *target = NULL;
+
+       while ((target = ast_channel_walk_locked(target))) {
+               if ((!strcasecmp(target->macroexten, exten) || !strcasecmp(target->exten, exten)) &&
+                   !strcasecmp(target->dialcontext, context) &&
+                   can_pickup(target)) {
+                       res = pickup_do(chan, target);
+                       ast_channel_unlock(target);
+                       break;
                }
+               ast_channel_unlock(target);
+       }
 
-               if (res)
-                       continue;
+       return res;
+}
 
-               if (target && (!target->pbx) && ((target->_state == AST_STATE_RINGING) || (target->_state == AST_STATE_RING) ) ) {
-                       ast_log(LOG_DEBUG, "Call pickup on chan '%s' by '%s'\n", target->name,
-                                       chan->name);
-                       res = ast_answer(chan);
-                       if (res) {
-                               ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan->name);
-                               res = -1;
-                               break;
-                       }
-                       res = ast_queue_control(chan, AST_CONTROL_ANSWER);
-                       if (res) {
-                               ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n",
-                                               chan->name);
-                               res = -1;
-                               break;
-                       }
-                       res = ast_channel_masquerade(target, chan);
-                       if (res) {
-                               ast_log(LOG_WARNING, "Unable to masquerade '%s' into '%s'\n", chan->name, target->name);
-                               res = -1;
+/* Attempt to pick up specified mark */
+static int pickup_by_mark(struct ast_channel *chan, const char *mark)
+{
+       int res = -1;
+       const char *tmp = NULL;
+       struct ast_channel *target = NULL;
+
+       while ((target = ast_channel_walk_locked(target))) {
+               if ((tmp = pbx_builtin_getvar_helper(target, PICKUPMARK)) &&
+                   !strcasecmp(tmp, mark) &&
+                   can_pickup(target)) {
+                       res = pickup_do(chan, target);
+                       ast_channel_unlock(target);
+                       break;
+               }
+               ast_channel_unlock(target);
+       }
+
+       return res;
+}
+
+/* Main application entry point */
+static int pickup_exec(struct ast_channel *chan, void *data)
+{
+       int res = 0;
+       char *tmp = ast_strdupa(data);
+       char *exten = NULL, *context = NULL;
+
+       if (ast_strlen_zero(data)) {
+               res = ast_pickup_call(chan);
+               return res;
+       }
+       
+       /* Parse extension (and context if there) */
+       while (!ast_strlen_zero(tmp) && (exten = strsep(&tmp, "&"))) {
+               if ((context = strchr(exten, '@')))
+                       *context++ = '\0';
+               if (!ast_strlen_zero(context) && !strcasecmp(context, PICKUPMARK)) {
+                       if (!pickup_by_mark(chan, exten))
                                break;
-                       }
                } else {
-                       ast_log(LOG_NOTICE, "No call pickup possible for %s...\n", exten);
-                       res = -1;
+                       if (!pickup_by_exten(chan, exten, !ast_strlen_zero(context) ? context : chan->context))
+                               break;
                }
+               ast_log(LOG_NOTICE, "No target channel found for %s.\n", exten);
        }
-       if (target) 
-               ast_mutex_unlock(&target->lock);
-       
-       LOCAL_USER_REMOVE(u);
 
        return res;
 }
 
-static int unload_module(void *mod)
+static int unload_module(void)
 {
        int res;
 
@@ -142,20 +165,9 @@ static int unload_module(void *mod)
        return res;
 }
 
-static int load_module(void *mod)
+static int load_module(void)
 {
-       __mod_desc = mod;
        return ast_register_application(app, pickup_exec, synopsis, descrip);
 }
 
-static const char *description(void)
-{
-       return "Directed Call Pickup Application";
-}
-
-static const char *key(void)
-{
-       return ASTERISK_GPL_KEY;
-}
-
-STD_MOD(MOD_1, NULL, NULL, NULL);
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Directed Call Pickup Application");