GEM host-side counterpart to the existing equipment server: wraps an
HSMS Connection (Active mode), installs an inbound dispatch table that
auto-acks the messages a host is expected to passively accept, and
exposes the GEM workflow primitives.
Inbound dispatch:
S5F1 Alarm Report observe (alarm handler) + S5F2 Accept
S6F11 Event Report observe (event handler) + S6F12 Accept
S6F25 Spool Data Ready S6F26 Accept (host policy: pull on demand)
S10F1 Terminal Display observe + S10F2 Accepted
S9F* Equipment errors observe (s9 handler); no ack (one-way)
Workflow shortcuts:
establish_communication() S1F13 -> S1F14
go_remote() S1F17 -> S1F18
go_offline() S1F15 -> S1F16
Plus a low-level send_request() escape hatch so the senders coming in
B2/B3 don't have to friend the connection internals.
Drive-by: event_reports.hpp was missing `<optional>` (worked transitively
through the equipment-side include chain but not when included from the
host-side standalone).
secsgem-py has `gem/hosthandler.py`; this mirrors its surface for the
inbound-ack and lifecycle parts. Outbound senders land in B2/B3.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
