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ARI/PJSIP: Add the ability to redirect (transfer) a channel in a Stasis app

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This patch adds a new feature to ARI to redirect a channel to another server,
and fixes a few bugs in PJSIP's handling of the Transfer dialplan
application/ARI redirect capability.

*New Feature*
A new operation has been added to the ARI channels resource, redirect. With
this, a channel in a Stasis application can be redirected to another endpoint
of the same underlying channel technology.

*Bug fixes*
In the process of writing this new feature, two bugs were fixed in the PJSIP
stack:
(1) The existing .transfer channel callback had the limitation that it could
    only transfer channels to a SIP URI, i.e., you had to pass
    'PJSIP/sip:foo@my_provider.com' to the dialplan application. While this is
    still supported, it is somewhat unintuitive - particularly in a world full
    of endpoints. As such, we now also support specifying the PJSIP endpoint to
    transfer to.
(2) res_pjsip_multihomed was, unfortunately, trying to 'help' a 302 redirect by
    updating its Contact header. Alas, that resulted in the forwarding
    destination set by the dialplan application/ARI resource/whatever being
    rewritten with very incorrect information. Hence, we now don't bother
    updating an outgoing response if it is a 302. Since this took a looong time
    to find, some additional debug statements have been added to those modules
    that update the Contact headers.

Review: https://reviewboard.asterisk.org/r/4316/

ASTERISK-24015 #close
Reported by: Private Name

ASTERISK-24703 #close
Reported by: Matt Jordan



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@431717 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Jordan
2015-02-12 20:32:48 +00:00
parent e8ec15a9ef
commit 1995baad71
11 changed files with 334 additions and 5 deletions
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26
res/ari/resource_channels.h
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@@ -221,6 +221,32 @@ int ast_ari_channels_continue_in_dialplan_parse_body(
* \param[out] response HTTP response
*/
void ast_ari_channels_continue_in_dialplan(struct ast_variable *headers, struct ast_ari_channels_continue_in_dialplan_args *args, struct ast_ari_response *response);
/*! Argument struct for ast_ari_channels_redirect() */
struct ast_ari_channels_redirect_args {
/*! Channel's id */
const char *channel_id;
/*! The endpoint to redirect the channel to */
const char *endpoint;
};
/*!
* \brief Body parsing function for /channels/{channelId}/redirect.
* \param body The JSON body from which to parse parameters.
* \param[out] args The args structure to parse into.
* \retval zero on success
* \retval non-zero on failure
*/
int ast_ari_channels_redirect_parse_body(
struct ast_json *body,
struct ast_ari_channels_redirect_args *args);
/*!
* \brief Redirect the channel to a different location.
*
* \param headers HTTP headers
* \param args Swagger parameters
* \param[out] response HTTP response
*/
void ast_ari_channels_redirect(struct ast_variable *headers, struct ast_ari_channels_redirect_args *args, struct ast_ari_response *response);
/*! Argument struct for ast_ari_channels_answer() */
struct ast_ari_channels_answer_args {
/*! Channel's id */