*
* Copyright (C) 2005, Joshua Colp
*
- * Joshua Colp <jcolp@asterlink.com>
+ * Joshua Colp <jcolp@digium.com>
+ *
+ * Portions merged from app_pickupchan, which was
+ * Copyright (C) 2008, Gary Cook
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
*
* \brief Directed Call Pickup Support
*
+ * \author Joshua Colp <jcolp@digium.com>
+ * \author Gary Cook
+ *
+ * \ingroup applications
*/
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
+/*** MODULEINFO
+ <support_level>core</support_level>
+ ***/
#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/pickup.h"
+#include "asterisk/manager.h"
+#include "asterisk/callerid.h"
+
+#define PICKUPMARK "PICKUPMARK"
+
+/*** DOCUMENTATION
+ <application name="Pickup" language="en_US">
+ <synopsis>
+ Directed extension call pickup.
+ </synopsis>
+ <syntax>
+ <parameter name="targets" argsep="&">
+ <argument name="extension" argsep="@" required="true">
+ <para>Specification of the pickup target.</para>
+ <argument name="extension" required="true"/>
+ <argument name="context" />
+ </argument>
+ <argument name="extension2" argsep="@" multiple="true">
+ <para>Additional specifications of pickup targets.</para>
+ <argument name="extension2" required="true"/>
+ <argument name="context2"/>
+ </argument>
+ </parameter>
+ </syntax>
+ <description>
+ <para>This application can pickup a specified ringing channel. The channel
+ to pickup can be specified in the following ways.</para>
+ <para>1) If no <replaceable>extension</replaceable> targets are specified,
+ the application will pickup a channel matching the pickup group of the
+ requesting channel.</para>
+ <para>2) If the <replaceable>extension</replaceable> is specified with a
+ <replaceable>context</replaceable> of the special string
+ <literal>PICKUPMARK</literal> (for example 10@PICKUPMARK), the application
+ will pickup a channel which has defined the channel variable
+ <variable>PICKUPMARK</variable> with the same value as
+ <replaceable>extension</replaceable> (in this example,
+ <literal>10</literal>).</para>
+ <para>3) If the <replaceable>extension</replaceable> is specified
+ with or without a <replaceable>context</replaceable>, the channel with a
+ matching <replaceable>extension</replaceable> and <replaceable>context</replaceable>
+ will be picked up. If no <replaceable>context</replaceable> is specified,
+ the current context will be used.</para>
+ <note><para>The <replaceable>extension</replaceable> is typically set on
+ matching channels by the dial application that created the channel. The
+ <replaceable>context</replaceable> is set on matching channels by the
+ channel driver for the device.</para></note>
+ </description>
+ </application>
+ <application name="PickupChan" language="en_US">
+ <synopsis>
+ Pickup a ringing channel.
+ </synopsis>
+ <syntax >
+ <parameter name="channel" argsep="&" required="true">
+ <argument name="channel" required="true" />
+ <argument name="channel2" required="false" multiple="true" />
+ <para>List of channel names or channel uniqueids to pickup if ringing.
+ For example, a channel name could be <literal>SIP/bob</literal> or
+ <literal>SIP/bob-00000000</literal> to find
+ <literal>SIP/bob-00000000</literal>.
+ </para>
+ </parameter>
+ <parameter name="options" required="false">
+ <optionlist>
+ <option name="p">
+ <para>Supplied channel names are prefixes. For example,
+ <literal>SIP/bob</literal> will match
+ <literal>SIP/bob-00000000</literal> and
+ <literal>SIP/bobby-00000000</literal>.
+ </para>
+ </option>
+ </optionlist>
+ </parameter>
+ </syntax>
+ <description>
+ <para>Pickup a specified <replaceable>channel</replaceable> if ringing.</para>
+ </description>
+ </application>
+ ***/
+
+static const char app[] = "Pickup";
+static const char app2[] = "PickupChan";
+
+struct pickup_by_name_args {
+ /*! Channel attempting to pickup a call. */
+ struct ast_channel *chan;
+ /*! Channel uniqueid or partial channel name to match. */
+ const char *name;
+ /*! Length of partial channel name to match. */
+ size_t len;
+};
+
+static int find_by_name(void *obj, void *arg, void *data, int flags)
+{
+ struct ast_channel *target = obj;/*!< Potential pickup target */
+ struct pickup_by_name_args *args = data;
+
+ if (args->chan == target) {
+ /* The channel attempting to pickup a call cannot pickup itself. */
+ return 0;
+ }
+
+ ast_channel_lock(target);
+ if (!strncasecmp(ast_channel_name(target), args->name, args->len)
+ && ast_can_pickup(target)) {
+ /* Return with the channel still locked on purpose */
+ return CMP_MATCH | CMP_STOP;
+ }
+ ast_channel_unlock(target);
+
+ return 0;
+}
+
+static int find_by_uniqueid(void *obj, void *arg, void *data, int flags)
+{
+ struct ast_channel *target = obj;/*!< Potential pickup target */
+ struct pickup_by_name_args *args = data;
+
+ if (args->chan == target) {
+ /* The channel attempting to pickup a call cannot pickup itself. */
+ return 0;
+ }
+
+ ast_channel_lock(target);
+ if (!strcasecmp(ast_channel_uniqueid(target), args->name)
+ && ast_can_pickup(target)) {
+ /* Return with the channel still locked on purpose */
+ return CMP_MATCH | CMP_STOP;
+ }
+ ast_channel_unlock(target);
+
+ return 0;
+}
+
+/*! \brief Helper Function to walk through ALL channels checking NAME and STATE */
+static struct ast_channel *find_by_channel(struct ast_channel *chan, const char *channame)
+{
+ struct ast_channel *target;
+ char *chkchan;
+ struct pickup_by_name_args pickup_args;
+
+ pickup_args.chan = chan;
+
+ if (strchr(channame, '-')) {
+ /*
+ * Use the given channel name string as-is. This allows a full channel
+ * name with a typical sequence number to be used as well as still
+ * allowing the odd partial channel name that has a '-' in it to still
+ * work, i.e. Local/bob@en-phone.
+ */
+ pickup_args.len = strlen(channame);
+ pickup_args.name = channame;
+ } else {
+ /*
+ * Append a '-' for the comparison so we check the channel name less
+ * a sequence number, i.e Find SIP/bob- and not SIP/bobby.
+ */
+ pickup_args.len = strlen(channame) + 1;
+ chkchan = ast_alloca(pickup_args.len + 1);
+ strcpy(chkchan, channame);/* Safe */
+ strcat(chkchan, "-");
+ pickup_args.name = chkchan;
+ }
+ target = ast_channel_callback(find_by_name, NULL, &pickup_args, 0);
+ if (target) {
+ return target;
+ }
-static const char *tdesc = "Directed Call Pickup Application";
-static const char *app = "Pickup";
-static const char *synopsis = "Directed Call Pickup application.";
-static const char *descrip =
-" Pickup(extension@context):\n"
-"Steals any calls to a specified extension that are in a ringing state and bridges them to the current channel. Context is an optional argument.\n";
+ /* Now try a search for uniqueid. */
+ pickup_args.name = channame;
+ pickup_args.len = 0;
+ return ast_channel_callback(find_by_uniqueid, NULL, &pickup_args, 0);
+}
-STANDARD_LOCAL_USER;
+/*! \brief Attempt to pick up named channel. */
+static int pickup_by_channel(struct ast_channel *chan, const char *name)
+{
+ int res = -1;
+ struct ast_channel *target;/*!< Potential pickup target */
+
+ /* The found channel is already locked. */
+ target = find_by_channel(chan, name);
+ if (target) {
+ res = ast_do_pickup(chan, target);
+ ast_channel_unlock(target);
+ target = ast_channel_unref(target);
+ }
-LOCAL_USER_DECL;
+ return res;
+}
-static int pickup_exec(struct ast_channel *chan, void *data)
+/* 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 = 0;
- struct localuser *u = NULL;
- struct ast_channel *origin = NULL, *target = NULL;
- char *tmp = NULL, *exten = NULL, *context = NULL;
- char workspace[256] = "";
+ struct ast_channel *target = NULL;/*!< Potential pickup target */
+ struct ast_channel_iterator *iter;
+ int res = -1;
+
+ if (!(iter = ast_channel_iterator_by_exten_new(exten, context))) {
+ return -1;
+ }
+
+ while ((target = ast_channel_iterator_next(iter))) {
+ ast_channel_lock(target);
+ if ((chan != target) && ast_can_pickup(target)) {
+ ast_log(LOG_NOTICE, "%s pickup by %s\n", ast_channel_name(target), ast_channel_name(chan));
+ break;
+ }
+ ast_channel_unlock(target);
+ target = ast_channel_unref(target);
+ }
+
+ ast_channel_iterator_destroy(iter);
+
+ if (target) {
+ res = ast_do_pickup(chan, target);
+ ast_channel_unlock(target);
+ target = ast_channel_unref(target);
+ }
+
+ return res;
+}
+
+static int find_by_mark(void *obj, void *arg, void *data, int flags)
+{
+ struct ast_channel *target = obj;/*!< Potential pickup target */
+ struct ast_channel *chan = arg;
+ const char *mark = data;
+ const char *tmp;
+
+ if (chan == target) {
+ /* The channel attempting to pickup a call cannot pickup itself. */
+ return 0;
+ }
+
+ ast_channel_lock(target);
+ tmp = pbx_builtin_getvar_helper(target, PICKUPMARK);
+ if (tmp && !strcasecmp(tmp, mark) && ast_can_pickup(target)) {
+ /* Return with the channel still locked on purpose */
+ return CMP_MATCH | CMP_STOP;
+ }
+ ast_channel_unlock(target);
+
+ return 0;
+}
+
+/* Attempt to pick up specified mark */
+static int pickup_by_mark(struct ast_channel *chan, const char *mark)
+{
+ struct ast_channel *target;/*!< Potential pickup target */
+ int res = -1;
+
+ /* The found channel is already locked. */
+ target = ast_channel_callback(find_by_mark, chan, (char *) mark, 0);
+ if (target) {
+ res = ast_do_pickup(chan, target);
+ ast_channel_unlock(target);
+ target = ast_channel_unref(target);
+ }
+
+ return res;
+}
+
+static int pickup_by_group(struct ast_channel *chan)
+{
+ struct ast_channel *target;/*!< Potential pickup target */
+ int res = -1;
+
+ /* The found channel is already locked. */
+ target = ast_pickup_find_by_group(chan);
+ if (target) {
+ ast_log(LOG_NOTICE, "pickup %s attempt by %s\n", ast_channel_name(target), ast_channel_name(chan));
+ res = ast_do_pickup(chan, target);
+ ast_channel_unlock(target);
+ target = ast_channel_unref(target);
+ }
+
+ return res;
+}
+
+/* application entry point for Pickup() */
+static int pickup_exec(struct ast_channel *chan, const char *data)
+{
+ char *parse;
+ char *exten;
+ char *context;
if (ast_strlen_zero(data)) {
- ast_log(LOG_WARNING, "Pickup requires an argument (extension) !\n");
- return -1;
- }
-
- LOCAL_USER_ADD(u);
-
- /* Get the extension and context if present */
- exten = data;
- context = strchr(data, '@');
- if (context) {
- *context = '\0';
- context++;
- }
-
- /* 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);
- 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_DEBUG, "No target channel found.\n");
- res = -1;
+ return pickup_by_group(chan) ? 0 : -1;
+ }
+
+ /* Parse extension (and context if there) */
+ parse = ast_strdupa(data);
+ for (;;) {
+ if (ast_strlen_zero(parse)) {
+ break;
}
- ast_mutex_unlock(&origin->lock);
- } else {
- ast_log(LOG_DEBUG, "No originating channel found.\n");
- }
-
- if (res)
- goto out;
-
- 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;
- goto out;
+ exten = strsep(&parse, "&");
+ if (ast_strlen_zero(exten)) {
+ continue;
}
- 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;
- goto out;
+
+ context = strchr(exten, '@');
+ if (context) {
+ *context++ = '\0';
}
- 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;
- goto out;
+ if (!ast_strlen_zero(context) && !strcasecmp(context, PICKUPMARK)) {
+ if (!pickup_by_mark(chan, exten)) {
+ /* Pickup successful. Stop the dialplan this channel is a zombie. */
+ return -1;
+ }
+ } else {
+ if (ast_strlen_zero(context)) {
+ context = (char *) ast_channel_context(chan);
+ }
+ if (!pickup_by_exten(chan, exten, context)) {
+ /* Pickup successful. Stop the dialplan this channel is a zombie. */
+ return -1;
+ }
}
- } else {
- ast_log(LOG_DEBUG, "No call pickup possible...\n");
- res = -1;
+ ast_log(LOG_NOTICE, "No target channel found for %s@%s.\n", exten, context);
}
- /* Done */
- out:
- if (target)
- ast_mutex_unlock(&target->lock);
-
- LOCAL_USER_REMOVE(u);
- return res;
+ /* Pickup failed. Keep going in the dialplan. */
+ return 0;
}
-int unload_module(void)
+/* Find channel for pick up specified by partial channel name */
+static struct ast_channel *find_by_part(struct ast_channel *chan, const char *part)
{
- int res;
+ struct ast_channel *target;
+ struct pickup_by_name_args pickup_args;
- res = ast_unregister_application(app);
-
- STANDARD_HANGUP_LOCALUSERS;
+ pickup_args.chan = chan;
- return res;
+ /* Try a partial channel name search. */
+ pickup_args.name = part;
+ pickup_args.len = strlen(part);
+ target = ast_channel_callback(find_by_name, NULL, &pickup_args, 0);
+ if (target) {
+ return target;
+ }
+
+ /* Now try a search for uniqueid. */
+ pickup_args.name = part;
+ pickup_args.len = 0;
+ return ast_channel_callback(find_by_uniqueid, NULL, &pickup_args, 0);
}
-int load_module(void)
+/* Attempt to pick up specified by partial channel name */
+static int pickup_by_part(struct ast_channel *chan, const char *part)
{
- return ast_register_application(app, pickup_exec, synopsis, descrip);
+ struct ast_channel *target;/*!< Potential pickup target */
+ int res = -1;
+
+ /* The found channel is already locked. */
+ target = find_by_part(chan, part);
+ if (target) {
+ res = ast_do_pickup(chan, target);
+ ast_channel_unlock(target);
+ target = ast_channel_unref(target);
+ }
+
+ return res;
}
-char *description(void)
+enum OPT_PICKUPCHAN_FLAGS {
+ OPT_PICKUPCHAN_PARTIAL = (1 << 0), /* Channel name is a partial name. */
+};
+
+AST_APP_OPTIONS(pickupchan_opts, BEGIN_OPTIONS
+ AST_APP_OPTION('p', OPT_PICKUPCHAN_PARTIAL),
+END_OPTIONS);
+
+/* application entry point for PickupChan() */
+static int pickupchan_exec(struct ast_channel *chan, const char *data)
{
- return (char *) tdesc;
+ char *pickup = NULL;
+ char *parse = ast_strdupa(data);
+ AST_DECLARE_APP_ARGS(args,
+ AST_APP_ARG(channel);
+ AST_APP_ARG(options);
+ AST_APP_ARG(other); /* Any remining unused arguments */
+ );
+ struct ast_flags opts;
+
+ AST_STANDARD_APP_ARGS(args, parse);
+
+ if (ast_strlen_zero(args.channel)) {
+ ast_log(LOG_WARNING, "PickupChan requires an argument (channel)!\n");
+ /* Pickup failed. Keep going in the dialplan. */
+ return 0;
+ }
+ if (ast_app_parse_options(pickupchan_opts, &opts, NULL, args.options)) {
+ /*
+ * General invalid option syntax.
+ * Pickup failed. Keep going in the dialplan.
+ */
+ return 0;
+ }
+
+ /* Parse channel */
+ for (;;) {
+ if (ast_strlen_zero(args.channel)) {
+ break;
+ }
+ pickup = strsep(&args.channel, "&");
+ if (ast_strlen_zero(pickup)) {
+ continue;
+ }
+
+ if (ast_test_flag(&opts, OPT_PICKUPCHAN_PARTIAL)) {
+ if (!pickup_by_part(chan, pickup)) {
+ /* Pickup successful. Stop the dialplan this channel is a zombie. */
+ return -1;
+ }
+ } else if (!pickup_by_channel(chan, pickup)) {
+ /* Pickup successful. Stop the dialplan this channel is a zombie. */
+ return -1;
+ }
+ ast_log(LOG_NOTICE, "No target channel found for %s.\n", pickup);
+ }
+
+ /* Pickup failed. Keep going in the dialplan. */
+ return 0;
}
-int usecount(void)
+static int unload_module(void)
{
int res;
- STANDARD_USECOUNT(res);
+ res = ast_unregister_application(app);
+ res |= ast_unregister_application(app2);
return res;
}
-char *key()
+static int load_module(void)
{
- return ASTERISK_GPL_KEY;
+ int res;
+
+ res = ast_register_application_xml(app, pickup_exec);
+ res |= ast_register_application_xml(app2, pickupchan_exec);
+
+ return res;
}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Directed Call Pickup Application");
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