/* Attempt to pick up specified extension with context */
static int pickup_by_exten(struct ast_channel *chan, const char *exten, const char *context)
{
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;
}
struct ast_channel *ast_pickup_find_by_group(struct ast_channel *chan)
{
struct ao2_container *candidates;/*!< Candidate channels found to pickup. */
struct ast_channel *target;/*!< Potential pickup target */
candidates = ao2_container_alloc_options(AO2_ALLOC_OPT_LOCK_NOLOCK, 1, NULL, NULL);
if (!candidates) {
return NULL;
}
/* Find all candidate targets by group. */
ast_channel_callback(find_channel_by_group, chan, candidates, 0);
/* Find the oldest pickup target candidate */
target = NULL;
for (;;) {
struct ast_channel *candidate;/*!< Potential new older target */
struct ao2_iterator iter;
iter = ao2_iterator_init(candidates, 0);
while ((candidate = ao2_iterator_next(&iter))) {
if (!target) {
/* First target. */
target = candidate;
continue;
}
if (ast_tvcmp(ast_channel_creationtime(candidate), ast_channel_creationtime(target)) < 0) {
/* We have a new target. */
ast_channel_unref(target);
target = candidate;
continue;
}
ast_channel_unref(candidate);
}
ao2_iterator_destroy(&iter);
if (!target) {
/* No candidates found. */
break;
}
/* The found channel must be locked and ref'd. */
ast_channel_lock(target);
/* Recheck pickup ability */
if (ast_can_pickup(target)) {
/* This is the channel to pickup. */
break;
}
/* Someone else picked it up or the call went away. */
ast_channel_unlock(target);
ao2_unlink(candidates, target);
target = ast_channel_unref(target);
}
ao2_ref(candidates, -1);
return target;
}
static int pickup_by_name_cb(void *obj, void *arg, void *data, int flags)
{
struct ast_channel *target = obj;/*!< Potential pickup target */
struct pickup_by_name_args *args = data;
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_channel_by_group(void *obj, void *arg, void *data, int flags)
{
struct ast_channel *target = obj;/*!< Potential pickup target */
struct ast_channel *chan = data;/*!< Channel wanting to pickup call */
ast_channel_lock(target);
if (chan != target && (chan->pickupgroup & target->callgroup)
&& ast_can_pickup(target)) {
/* Return with the channel still locked on purpose */
return CMP_MATCH | CMP_STOP;
}
ast_channel_unlock(target);
return 0;
}
/* Find channel for pick up specified by partial channel name */
static int find_by_part(void *obj, void *arg, void *data, int flags)
{
struct ast_channel *target = obj;/*!< Potential pickup target */
const char *part = data;
int len = strlen(part);
ast_channel_lock(target);
if (len <= strlen(ast_channel_name(target)) && !strncmp(ast_channel_name(target), part, 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_mark(void *obj, void *arg, void *data, int flags)
{
struct ast_channel *target = obj;/*!< Potential pickup target */
const char *mark = data;
const char *tmp;
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;
}
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;
}
static int find_channel_by_group(void *obj, void *arg, void *data, int flags)
{
struct ast_channel *target = obj; /*!< Potential pickup target */
struct ast_channel *chan = arg; /*!< Channel wanting to pickup call */
if (chan == target) {
return 0;
}
ast_channel_lock(target);
if (ast_can_pickup(target)) {
/* Lock both channels. */
while (ast_channel_trylock(chan)) {
ast_channel_unlock(target);
sched_yield();
ast_channel_lock(target);
}
/*
* Both callgroup and namedcallgroup pickup variants are
* matched independently. Checking for named group match is
* done last since it's a more expensive operation.
*/
if ((ast_channel_pickupgroup(chan) & ast_channel_callgroup(target))
|| (ast_namedgroups_intersect(ast_channel_named_pickupgroups(chan),
ast_channel_named_callgroups(target)))) {
struct ao2_container *candidates = data;/*!< Candidate channels found. */
/* This is a candidate to pickup */
ao2_link(candidates, target);
}
ast_channel_unlock(chan);
}
ast_channel_unlock(target);
return 0;
}
