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3d06c4e22f
Wire gns3-server to uBridge's real-time marker controls (contract
../ubridge/doc/gns3server-integration.md §3.2), in three layers:
A. enabled reaches uBridge — _markers_for_node no longer drops disabled
markers controller-side; it carries `enabled` in the NIO spec. apply
installs every marker then issues `enable_packet_filter … off` for the
disabled ones (base_node bridge / iou iol_bridge; old-ubridge errors
downgrade to a warning so a toggle can't break link create).
B. instant per-filter toggle — apply records name→bridge so a new
`_ubridge_set_marker_filter_state` can flip a running filter with
`enable_packet_filter on|off` (iou overrides for iol_bridge + bay/unit).
Each marker-capable node type gains PUT /markers/{name}; update_marker
short-circuits to it when only `enabled` changes (no NIO rebuild, no pcap
flush), falling back to reset+reapply if the route is unavailable.
C. global pause/resume — `_ubridge_marker_pause/resume` send `marker pause`
/ `marker resume` direct to the hypervisor (pause stops signal+pcap,
resume instant, sink retained). Six node-type routes add POST
/markers/pause|resume; project.pause_all/resume_all_markers fan out to
each capture node (deduped, best-effort); REST exposes
POST /projects/{id}/markers/pause|resume.
Toggling enabled and pause/resume are now both instant — only marker create
or a bpf change still go through reset+reapply.