gb: Add beginnings of a new BSSGP implementation
Similar to ns2 superseding ns, we now also intoduce a next generation
of BSSGP related code to libosmogb. However, this is not aiming to
be a full implementation yet, but simply those parts that we currently
need from the revamped osmo-gbproxy.
The gprs_bssgp2.[ch] differs in two ways from the old code:
* it separates message encoding from message transmission
* it supports more recent specs / IEs
bssgp_bvc_fsm.c is a genric implementation of the BSSGP BVC
RESET/BLOCK/UNBLOCK logic with support for both PTP and signaling,
both on the SGSN side and the BSS side.
Change-Id: Icbe8e4f03b68fd73b8eae95f6f6cccd4fa9af95a
diff --git a/include/osmocom/gprs/gprs_bssgp2.h b/include/osmocom/gprs/gprs_bssgp2.h
new file mode 100644
index 0000000..0ab3619
--- /dev/null
+++ b/include/osmocom/gprs/gprs_bssgp2.h
@@ -0,0 +1,31 @@
+#pragma once
+#include <stdint.h>
+
+#include <osmocom/gprs/protocol/gsm_08_18.h>
+#include <osmocom/gprs/gprs_ns2.h>
+
+struct gprs_ns2_inst;
+struct gprs_ra_id;
+struct msgb;
+
+int bssgp2_nsi_tx_ptp(struct gprs_ns2_inst *nsi, uint16_t nsei, uint16_t bvci,
+ struct msgb *msg, uint32_t lsp);
+
+int bssgp2_nsi_tx_sig(struct gprs_ns2_inst *nsi, uint16_t nsei, struct msgb *msg, uint32_t lsp);
+
+struct msgb *bssgp2_enc_bvc_block(uint16_t bvci, enum gprs_bssgp_cause cause);
+
+struct msgb *bssgp2_enc_bvc_block_ack(uint16_t bvci);
+
+struct msgb *bssgp2_enc_bvc_unblock(uint16_t bvci);
+
+struct msgb *bssgp2_enc_bvc_unblock_ack(uint16_t bvci);
+
+struct msgb *bssgp2_enc_bvc_reset(uint16_t bvci, enum gprs_bssgp_cause cause,
+ const struct gprs_ra_id *ra_id, uint16_t cell_id,
+ const uint8_t *feat_bm, const uint8_t *ext_feat_bm);
+
+struct msgb *bssgp2_enc_bvc_reset_ack(uint16_t bvci, const struct gprs_ra_id *ra_id, uint16_t cell_id,
+ const uint8_t *feat_bm, const uint8_t *ext_feat_bm);
+
+struct msgb *bssgp2_enc_status(uint8_t cause, const uint16_t *bvci, const struct msgb *orig_msg);