From 9f52d81ad4bc34c39d4915e15d5a19a4dc1d6626 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Sun, 24 Jun 2012 20:17:57 +0200
Subject: ganc: process some more messages

---
 openbsc/src/osmo-ganc/ganc_data.h   | 20 ++++++----
 openbsc/src/osmo-ganc/ganc_server.c | 77 +++++++++++++++++++++++++++++++++----
 2 files changed, 82 insertions(+), 15 deletions(-)

diff --git a/openbsc/src/osmo-ganc/ganc_data.h b/openbsc/src/osmo-ganc/ganc_data.h
index 1c4a4c5e3..9795964b7 100644
--- a/openbsc/src/osmo-ganc/ganc_data.h
+++ b/openbsc/src/osmo-ganc/ganc_data.h
@@ -6,13 +6,6 @@
 
 struct ganc_bts;
 
-struct gan_peer {
-	struct llist_head list;
-	struct osmo_conn *conn;
-	struct ganc_bts *bts;
-	uint8_t gan_release;
-};
-
 enum ganc_net_timer {
 	T3212,
 	TU3901,
@@ -32,6 +25,19 @@ enum ganc_net_timer {
 	_NUM_GANC_TIMER
 };
 
+enum ganc_state {
+	GA_S_CSR_IDLE,
+	GA_S_CSR_DEDICATED,
+};
+
+struct gan_peer {
+	struct llist_head list;
+	struct osmo_conn *conn;
+	struct ganc_bts *bts;
+	uint8_t gan_release;
+	enum ganc_state csr_state;
+};
+
 struct ganc_net {
 	uint8_t country_code;
 	uint8_t network_code;
diff --git a/openbsc/src/osmo-ganc/ganc_server.c b/openbsc/src/osmo-ganc/ganc_server.c
index 8b880b4ab..5ccbc654f 100644
--- a/openbsc/src/osmo-ganc/ganc_server.c
+++ b/openbsc/src/osmo-ganc/ganc_server.c
@@ -161,9 +161,27 @@ static int tx_unc_disco_acc(struct gan_peer *peer, const char *segw_host,
 	return unc_peer_tx(peer, msg);
 }
 
-static int rx_unc_discovery_req(struct gan_peer *peer, struct msgb *msg,
-				struct gan_rc_csr_hdr *gh)
+/* 10.1.13 GA-CSR REQUEST ACCEPT */
+static int tx_csr_request_acc(struct gan_peer *peer)
 {
+	struct msgb *msg = unc_msgb_alloc();
+
+	printf("<- GA-CSR REQUEST ACCEPT\n");
+
+	if (!msg)
+		return -ENOMEM;
+
+	push_rc_csr_hdr(msg, GA_PDISC_CSR, GA_MT_CSR_REQUEST_ACCEPT);
+
+	peer->csr_state = GA_S_CSR_DEDICATED;
+
+	return unc_peer_tx(peer, msg);
+}
+
+/* 10.1.2 GA-RC DISCOVERY REQUEST */
+static int rx_rc_discovery_req(struct gan_peer *peer, struct msgb *msg)
+{
+	struct gan_rc_csr_hdr *gh = (struct gan_rc_csr_hdr *) msg->l2h;
 	struct tlv_parsed tp;
 	int rc;
 
@@ -184,22 +202,65 @@ static int rx_unc_discovery_req(struct gan_peer *peer, struct msgb *msg,
 				"laforge.gnumonks.org");
 }
 
-static int rx_unc_register_req(struct gan_peer *peer, struct msgb *msg,
-			       struct gan_rc_csr_hdr *gh)
+/* 10.1.5 GA-RC REGISTER REQUEST */
+static int rx_rc_register_req(struct gan_peer *peer, struct msgb *msg)
 {
 	printf("-> GA-RC REGISTER REQUEST\n");
 
 	return tx_unc_reg_acc(peer);
 }
 
-static int rx_unc_rc(struct gan_peer *peer, struct msgb *msg, struct gan_rc_csr_hdr *gh)
+/* 10.1.12 GA CSR REQUEST */
+static int rx_csr_request(struct gan_peer *peer, struct msgb *msg)
+{
+	printf("-> GA-CSR REQUEST\n");
+
+	return tx_csr_request_acc(peer);
+}
+
+/* 10.1.37 GA-CSR CLEAR REQUEST */
+static int rx_csr_clear_req(struct gan_peer *peer, struct msgb *msg)
+{
+	printf("-> GA-CSR CLEAR REQUEST\n");
+
+	/* FIXME: request core network to release all dedicated resources */
+	return 0;
+}
+
+/* 10.1.20 GA-CSR RELEASE COMPLETE */
+static int rx_csr_rel_compl(struct gan_peer *peer, struct msgb *msg)
+{
+	printf("-> GA-CSR RELEASE COMPLETE\n");
+
+	peer->csr_state = GA_S_CSR_IDLE;
+
+	return 0;
+}
+
+/* 10.1.9 GA-RC DEREGISTER */
+static int rx_rc_deregister(struct gan_peer *peer, struct msgb *msg)
+{
+	/* Release all resources, MS will TCP disconnect */
+	return 0;
+}
+
+static int rx_unc_rc_csr(struct gan_peer *peer, struct msgb *msg,
+			 struct gan_rc_csr_hdr *gh)
 {
 	switch (gh->msg_type) {
 	case GA_MT_RC_DISCOVERY_REQUEST:
-		return rx_unc_discovery_req(peer, msg, gh);
+		return rx_rc_discovery_req(peer, msg);
 	case GA_MT_RC_REGISTER_REQUEST:
-		return rx_unc_register_req(peer, msg, gh);
+		return rx_rc_register_req(peer, msg);
+	case GA_MT_CSR_REQUEST:
+		return rx_csr_request(peer, msg);
+	case GA_MT_CSR_CLEAR_REQ:
+		return rx_csr_clear_req(peer, msg);
+	case GA_MT_CSR_RELEASE_COMPL:
+		return rx_csr_rel_compl(peer, msg);
 	case GA_MT_RC_DEREGISTER:
+		return rx_rc_deregister(peer, msg);
+	default:
 		break;
 	}
 
@@ -215,7 +276,7 @@ static int rx_unc_msg(struct gan_peer *peer, struct msgb *msg)
 	switch (gh->pdisc) {
 	case GA_PDISC_RC:
 	case GA_PDISC_CSR:
-		return rx_unc_rc(peer, msg, gh);
+		return rx_unc_rc_csr(peer, msg, gh);
 	case GA_PDISC_PSR:
 	default:
 		break;
-- 
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