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presencestate: Allow channel drivers to provide presence state information

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This patch adds the ability for channel drivers to supply presence information
in a similar manner to device state. The patch does not provide any channel
driver implementations, but it does provide the core infrastructure necessary
for channel drivers to provide such information.

The core handles multiple providers of presence state information. Ordering
of presence state is as follows:
 INVALID < NOT_SET < AVAILABLE < UNAVAILABLE < CHAT < AWAY < XA < DND

Each provider can trump the previous if it provides a presence state that
supercedes a previous one.

Review: https://reviewboard.asterisk.org/r/4050

ASTERISK-24363 #close
Reported by: Gareth Palmer
patches:
  chan_presencestate-428146.patch uploaded by Gareth Palmer (License 5169)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@429967 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Jordan
2014-12-22 14:33:24 +00:00
parent 2afeadcc84
commit 0c38276d6e
4 changed files with 214 additions and 63 deletions
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1
include/asterisk/channel.h
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@@ -631,6 +631,7 @@ struct ast_channel_tech {
struct ast_channel *(* const requester)(const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *addr, int *cause);
int (* const devicestate)(const char *device_number); /*!< Devicestate call back */
int (* const presencestate)(const char *presence_provider, char **subtype, char **message); /*!< Presencestate callback */
/*!
* \brief Start sending a literal DTMF digit