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chan_pjsip: Provide a means for tracking device state when holding/unholding

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Previously PJSIP did not track hold/unhold and it would always simply be
'inuse'. This patch fixes that.

review: https://reviewboard.asterisk.org/r/3129/
........

Merged revisions 405908 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@405910 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Jonathan Rose
2014-01-20 18:18:25 +00:00
parent fcc492645b
commit 85fbbed45d
1 changed files with 139 additions and 1 deletions
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140
channels/chan_pjsip.c
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@@ -677,6 +677,114 @@ static int chan_pjsip_fixup(struct ast_channel *oldchan, struct ast_channel *new
return 0;
}
/*! AO2 hash function for on hold UIDs */
static int uid_hold_hash_fn(const void *obj, const int flags)
{
const char *key = obj;
switch (flags & OBJ_SEARCH_MASK) {
case OBJ_SEARCH_KEY:
break;
case OBJ_SEARCH_OBJECT:
break;
default:
/* Hash can only work on something with a full key. */
ast_assert(0);
return 0;
}
return ast_str_hash(key);
}
/*! AO2 sort function for on hold UIDs */
static int uid_hold_sort_fn(const void *obj_left, const void *obj_right, const int flags)
{
const char *left = obj_left;
const char *right = obj_right;
int cmp;
switch (flags & OBJ_SEARCH_MASK) {
case OBJ_SEARCH_OBJECT:
case OBJ_SEARCH_KEY:
cmp = strcmp(left, right);
break;
case OBJ_SEARCH_PARTIAL_KEY:
cmp = strncmp(left, right, strlen(right));
break;
default:
/* Sort can only work on something with a full or partial key. */
ast_assert(0);
cmp = 0;
break;
}
return cmp;
}
static struct ao2_container *pjsip_uids_onhold;
/*!
* \brief Add a channel ID to the list of PJSIP channels on hold
*
* \param chan_uid - Unique ID of the channel being put into the hold list
*
* \retval 0 Channel has been added to or was already in the hold list
* \retval -1 Failed to add channel to the hold list
*/
static int chan_pjsip_add_hold(const char *chan_uid)
{
RAII_VAR(char *, hold_uid, NULL, ao2_cleanup);
hold_uid = ao2_find(pjsip_uids_onhold, chan_uid, OBJ_SEARCH_KEY);
if (hold_uid) {
/* Device is already on hold. Nothing to do. */
return 0;
}
/* Device wasn't in hold list already. Create a new one. */
hold_uid = ao2_alloc_options(strlen(chan_uid) + 1, NULL,
AO2_ALLOC_OPT_LOCK_NOLOCK);
if (!hold_uid) {
return -1;
}
ast_copy_string(hold_uid, chan_uid, strlen(chan_uid) + 1);
if (ao2_link(pjsip_uids_onhold, hold_uid) == 0) {
return -1;
}
return 0;
}
/*!
* \brief Remove a channel ID from the list of PJSIP channels on hold
*
* \param chan_uid - Unique ID of the channel being taken out of the hold list
*/
static void chan_pjsip_remove_hold(const char *chan_uid)
{
ao2_find(pjsip_uids_onhold, chan_uid, OBJ_SEARCH_KEY | OBJ_UNLINK | OBJ_NODATA);
}
/*!
* \brief Determine whether a channel ID is in the list of PJSIP channels on hold
*
* \param chan_uid - Channel being checked
*
* \retval 0 The channel is not in the hold list
* \retval 1 The channel is in the hold list
*/
static int chan_pjsip_get_hold(const char *chan_uid)
{
RAII_VAR(char *, hold_uid, NULL, ao2_cleanup);
hold_uid = ao2_find(pjsip_uids_onhold, chan_uid, OBJ_SEARCH_KEY);
if (!hold_uid) {
return 0;
}
return 1;
}
/*! \brief Function called to get the device state of an endpoint */
static int chan_pjsip_devicestate(const char *data)
{
@@ -731,7 +839,11 @@ static int chan_pjsip_devicestate(const char *data)
ast_devstate_aggregate_add(&aggregate, AST_DEVICE_RINGING);
} else if ((snapshot->state == AST_STATE_UP) || (snapshot->state == AST_STATE_RING) ||
(snapshot->state == AST_STATE_BUSY)) {
ast_devstate_aggregate_add(&aggregate, AST_DEVICE_INUSE);
if (chan_pjsip_get_hold(snapshot->uniqueid)) {
ast_devstate_aggregate_add(&aggregate, AST_DEVICE_ONHOLD);
} else {
ast_devstate_aggregate_add(&aggregate, AST_DEVICE_INUSE);
}
inuse++;
}
}
@@ -925,6 +1037,8 @@ static int chan_pjsip_indicate(struct ast_channel *ast, int condition, const voi
struct ast_sip_session_media *media;
int response_code = 0;
int res = 0;
char *device_buf;
size_t device_buf_size;
switch (condition) {
case AST_CONTROL_RINGING:
@@ -1014,9 +1128,19 @@ static int chan_pjsip_indicate(struct ast_channel *ast, int condition, const voi
res = -1;
break;
case AST_CONTROL_HOLD:
chan_pjsip_add_hold(ast_channel_uniqueid(ast));
device_buf_size = strlen(ast_channel_name(ast)) + 1;
device_buf = alloca(device_buf_size);
ast_channel_get_device_name(ast, device_buf, device_buf_size);
ast_devstate_changed_literal(AST_DEVICE_ONHOLD, 1, device_buf);
ast_moh_start(ast, data, NULL);
break;
case AST_CONTROL_UNHOLD:
chan_pjsip_remove_hold(ast_channel_uniqueid(ast));
device_buf_size = strlen(ast_channel_name(ast)) + 1;
device_buf = alloca(device_buf_size);
ast_channel_get_device_name(ast, device_buf, device_buf_size);
ast_devstate_changed_literal(AST_DEVICE_UNKNOWN, 1, device_buf);
ast_moh_stop(ast);
break;
case AST_CONTROL_SRCUPDATE:
@@ -1755,6 +1879,8 @@ static void chan_pjsip_session_end(struct ast_sip_session *session)
return;
}
chan_pjsip_remove_hold(ast_channel_uniqueid(session->channel));
if (!ast_channel_hangupcause(session->channel) && session->inv_session) {
int cause = hangup_sip2cause(session->inv_session->cause);
@@ -1934,6 +2060,13 @@ static int load_module(void)
goto end;
}
if (!(pjsip_uids_onhold = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_RWLOCK,
AO2_CONTAINER_ALLOC_OPT_DUPS_REJECT, 37, uid_hold_hash_fn,
uid_hold_sort_fn, NULL))) {
ast_log(LOG_ERROR, "Unable to create held channels container\n");
goto end;
}
if (ast_sip_session_register_supplement(&pbx_start_supplement)) {
ast_log(LOG_ERROR, "Unable to register PJSIP pbx start supplement\n");
ast_sip_session_unregister_supplement(&chan_pjsip_supplement);
@@ -1957,6 +2090,8 @@ static int load_module(void)
return 0;
end:
ao2_cleanup(pjsip_uids_onhold);
pjsip_uids_onhold = NULL;
ast_custom_function_unregister(&media_offer_function);
ast_custom_function_unregister(&chan_pjsip_dial_contacts_function);
ast_channel_unregister(&chan_pjsip_tech);
@@ -1974,6 +2109,9 @@ static int reload(void)
/*! \brief Unload the PJSIP channel from Asterisk */
static int unload_module(void)
{
ao2_cleanup(pjsip_uids_onhold);
pjsip_uids_onhold = NULL;
ast_sip_session_unregister_supplement(&chan_pjsip_supplement);
ast_sip_session_unregister_supplement(&pbx_start_supplement);
ast_sip_session_unregister_supplement(&chan_pjsip_ack_supplement);