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res_pjsip_registrar.c: Update remove_existing AOR contact handling.

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When "rewrite_contact" is enabled, the "max_contacts" count option can
block re-registrations because the source port from the endpoint can be
random.  When the re-registration is blocked, the endpoint may give up
re-registering and require manual intervention.

* The "remove_existing" option now allows a registration to succeed by
displacing any existing contacts that now exceed the "max_contacts" count.
Any removed contacts are the next to expire.  The behaviour change is
beneficial when "rewrite_contact" is enabled and "max_contacts" is greater
than one.  The removed contact is likely the old contact created by
"rewrite_contact" that the device is refreshing.

ASTERISK-27192

Change-Id: I64c107a10b70db1697d17136051ae6bf22b5314b
This commit is contained in:
Richard Mudgett
2017-09-20 18:36:15 -05:00
parent 39b68a41f7
commit d388c18abf
5 changed files with 192 additions and 21 deletions
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8
include/asterisk/vector.h
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@@ -547,6 +547,14 @@ AST_VECTOR(ast_vector_int, int);
*/
#define AST_VECTOR_SIZE(vec) (vec)->current
/*!
* \brief Get the maximum number of elements the vector can currently hold.
*
* \param vec Vector to query.
* \return Maximum number of elements the vector can currently hold.
*/
#define AST_VECTOR_MAX_SIZE(vec) (vec)->max
/*!
* \brief Reset vector.
*