[PATCH 1/3] Channel requests/Management in gsm_subscriber

[Holger Freyther]

From 890b5c3c519dcbbcb140284b1e68b22b8ae71532 Mon Sep 17 00:00:00 2001
From: Holger Freyther <ich at tamarin.(none)>
Date: Tue, 31 Mar 2009 04:35:19 +0200
Subject: [PATCH] Proposal for a "channel request" interface...

Reuqests for a subscriber a stored within the gsm_subscriber
datastructure and it will keep track how many channels are
allocated for this user and of which type to decide on policy...

e.g. attempt to submit SMS during a phone call and not doing
paging but a simple (immediate) assignment of the channel...
---
 include/openbsc/gsm_subscriber.h |    5 +++++
 src/gsm_04_08.c                  |    2 +-
 src/gsm_subscriber.c             |   12 ++++++++++++
 3 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/include/openbsc/gsm_subscriber.h 
b/include/openbsc/gsm_subscriber.h
index 7da896e..52c2c66 100644
--- a/include/openbsc/gsm_subscriber.h
+++ b/include/openbsc/gsm_subscriber.h
@@ -24,6 +24,9 @@ struct gsm_subscriber {
 	int use_count;
 	struct llist_head entry;
 	struct gsm_bts *current_bts;
+
+	/* pending requests */
+	struct llist_head requests;
 };
 
 enum gsm_subscriber_field {
@@ -44,6 +47,8 @@ struct gsm_subscriber *subscr_get_by_imsi(const char *imsi);
 struct gsm_subscriber *subscr_get_by_extension(const char *ext);
 int subscr_update(struct gsm_subscriber *s, struct gsm_bts *bts, int reason);
 void subscr_put_channel(struct gsm_lchan *lchan);
+void subscr_get_channel(struct gsm_subscriber *subscr, int type,
+		        gsm_cbfn *cbfn, void *data);
 
 /* internal */
 struct gsm_subscriber *subscr_alloc(void);
diff --git a/src/gsm_04_08.c b/src/gsm_04_08.c
index 85af502..7a941b9 100644
--- a/src/gsm_04_08.c
+++ b/src/gsm_04_08.c
@@ -1098,7 +1098,7 @@ static int gsm48_cc_rx_setup(struct msgb *msg)
 	call->called_subscr = called_subscr;
 
 	/* start paging of the receiving end of the call */
-	paging_request(msg->trx->bts, called_subscr, RSL_CHANNEED_TCH_F,
+	subscr_get_channel(called_subscr, RSL_CHANNEED_TCH_F,
 			setup_trig_pag_evt, call);
 
 	/* send a CALL PROCEEDING message to the MO */
diff --git a/src/gsm_subscriber.c b/src/gsm_subscriber.c
index 0c2dd7c..bfb4983 100644
--- a/src/gsm_subscriber.c
+++ b/src/gsm_subscriber.c
@@ -44,6 +44,8 @@ struct gsm_subscriber *subscr_alloc(void)
 	llist_add_tail(&s->entry, &active_subscribers);
 	s->use_count = 1;
 
+	INIT_LLIST_HEAD(&s->requests);
+
 	return s;
 }
 
@@ -123,6 +125,16 @@ struct gsm_subscriber *subscr_put(struct gsm_subscriber 
*subscr)
 	return NULL;
 }
 
+void subscr_get_channel(struct gsm_subscriber *subscr, int type,
+			gsm_cbfn *cbfn, void *data)
+{
+        /* current_bts is the current VLR of the MobileStation */
+	if (!subscr->current_bts)
+		return;
+
+	paging_request(subscr->current_bts, subscr, type, cbfn, data);
+}
+
 void subscr_put_channel(struct gsm_lchan *lchan)
 {
 	/*
-- 
1.6.0.4