Add new 'osmo_ss7' SS7 core code with M3UA, ASP/AS FSM, ...

This is what aims to be a rather complete/proper implementation of the
SIGTRAN + SS7 protocol suite.  It has proper abstraction between the
layers with primitives, finite state machines for things like the AS and
ASP state machines, support for point code routing, etc.

What's not implemented at this point:
* re-integration of pre-existing SUA (pending)
* actual MTP2 and physical E1/T1 link support
* different trafic modes like broadcast/fail-over/load-balance

Change-Id: I375eb80f01acc013094851d91d1d3333ebc12bc7

1 files changed, 42 insertions, 0 deletions

diff --git a/src/xua_asp_fsm.h b/src/xua_asp_fsm.h
new file mode 100644
index 0000000..ea62484
--- /dev/null
+++ b/src/xua_asp_fsm.h
@@ -0,0 +1,42 @@
+#pragma once
+
+enum xua_asp_state {
+	XUA_ASP_S_DOWN,
+	XUA_ASP_S_INACTIVE,
+	XUA_ASP_S_ACTIVE,
+};
+
+enum xua_asp_event {
+	XUA_ASP_E_M_ASP_UP_REQ,
+	XUA_ASP_E_M_ASP_ACTIVE_REQ,
+	XUA_ASP_E_M_ASP_DOWN_REQ,
+	XUA_ASP_E_M_ASP_INACTIVE_REQ,
+
+	XUA_ASP_E_SCTP_COMM_DOWN_IND,
+	XUA_ASP_E_SCTP_RESTART_IND,
+
+	XUA_ASP_E_ASPSM_ASPUP,
+	XUA_ASP_E_ASPSM_ASPUP_ACK,
+	XUA_ASP_E_ASPTM_ASPAC,
+	XUA_ASP_E_ASPTM_ASPAC_ACK,
+	XUA_ASP_E_ASPSM_ASPDN,
+	XUA_ASP_E_ASPSM_ASPDN_ACK,
+	XUA_ASP_E_ASPTM_ASPIA,
+	XUA_ASP_E_ASPTM_ASPIA_ACK,
+
+	XUA_ASP_E_ASPSM_BEAT,
+	XUA_ASP_E_ASPSM_BEAT_ACK,
+
+	_NUM_XUA_ASP_E
+};
+
+enum xua_asp_role {
+	XUA_ASPFSM_ROLE_ASP,
+	XUA_ASPFSM_ROLE_SG,
+	XUA_ASPFSM_ROLE_IPSP,
+};
+
+extern struct osmo_fsm xua_asp_fsm;
+
+struct osmo_fsm_inst *xua_asp_fsm_start(struct osmo_ss7_asp *asp,
+					enum xua_asp_role role, int log_level);