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res_pjsip_keepalive: Add runtime configurable keepalive module for connection-oriented transports.

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Note that this is backport from trunk of r425825.

This change adds a module which is configurable using the keep_alive_interval setting in the
global section that will send a CRLF keep alive to all active connection-oriented transports at
the provided interval. This is useful because it can help keep connections open through NATs.
This functionality also exists within PJSIP but can not be controlled at runtime and requires
recompiling it.

Review: https://reviewboard.asterisk.org/r/4084/

ASTERISK-24644 #close


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@430084 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Jordan
2014-12-24 13:25:04 +00:00
parent 006ffdcfb2
commit 915bb88d3e
6 changed files with 303 additions and 0 deletions
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19
res/res_pjsip/config_global.c
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@@ -42,6 +42,8 @@ struct global_config {
);
/* Value to put in Max-Forwards header */
unsigned int max_forwards;
/* The interval at which to send keep alive messages to active connection-oriented transports */
unsigned int keep_alive_interval;
};
static void global_destructor(void *obj)
@@ -114,6 +116,21 @@ char *ast_sip_get_debug(void)
return res;
}
unsigned int ast_sip_get_keep_alive_interval(void)
{
unsigned int interval;
struct global_config *cfg = get_global_cfg();
if (!cfg) {
return 0;
}
interval = cfg->keep_alive_interval;
ao2_ref(cfg, -1);
return interval;
}
int ast_sip_initialize_sorcery_global(void)
{
struct ast_sorcery *sorcery = ast_sip_get_sorcery();
@@ -135,6 +152,8 @@ int ast_sip_initialize_sorcery_global(void)
OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, default_outbound_endpoint));
ast_sorcery_object_field_register(sorcery, "global", "debug", "no",
OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, debug));
ast_sorcery_object_field_register(sorcery, "global", "keep_alive_interval", "",
OPT_UINT_T, 0, FLDSET(struct global_config, keep_alive_interval));
return 0;
}