Persist every device that has ever logged in to the Go server in a small
JSON store (devices.json, overridable with YAMA_DEVICES_FILE and capped by
YAMA_DEVICES_MAX, default 1000 newest). The store follows the users.json
convention: atomic temp-file write with fsync and rename, a 500 ms debounce
for bursts of reconnects, first_seen preserved across logins, and pruning
that evicts offline records before devices that are still connected.
Devices connected at shutdown are stamped offline before the final flush so
last_seen stays accurate across restarts.
The server advertises an offlineDevices capability and device_list now
appends historical devices that are not online, marked with online:false and
last_seen. The web UI shows an Offline checkbox after Total/Showing (state
kept in localStorage), renders offline cards dimmed and dashed, and always
lists them in the screen-wall sidebar. Older servers without the capability
keep the online-only list.
Grid and List cards gain a delete button after the terminal button, admin
only, behind a confirmation dialog. Deleting an offline device removes its
history record; deleting an online device first sends the single-byte
TOKEN_UNINSTALL command (matching the MFC OnOnlineUninstall flow) and then
removes the record too, so the device does not come back as a dead offline
entry. The agent's own disconnect then runs the existing cleanup path:
screen and terminal sub-connections are closed, the hub entry is removed,
and browsers receive device_offline to release their watch sets, wall
sessions, and stream references. Wall mode exposes no delete action.
Tests cover history persistence/pruning/recovery, offline ordering, the
device_list merge, and all three delete outcomes (offline removal, online
uninstall with a single 0x3F byte, and viewer rejection).
Co-Authored-By: deepseek-flash
Bring the Go web backend up to parity with the MFC server's screen wall.
A browser tab can now stream several devices over one WebSocket: the
single `watching` field becomes a per-connection watch set guarded by the
hub mutex, capped at 32 devices per socket. The challenge advertises
`caps.multiWatch` and `caps.keyframeRequest`, binary frames stay keyed by
the low 32 bits of the device ID, and connect/disconnect replies echo the
device id and request id so the wall can route concurrent responses.
Input commands (mouse, key, clipboard, rdp_reset) resolve their target
from the watch set: an explicit id must be a current subscription, and an
absent id is accepted only while exactly one device is watched. Legacy
frontends that do not send `multiWatch` keep replace-all semantics, so a
repeated device switch cannot grow the set without bound. Offline
devices are removed from every watch set, and teardown is computed from a
snapshot taken outside the hub lock to avoid re-entrant locking.
Add the `keyframe` command: it replays the cached IDR, then asks the
device to emit a fresh one, rate-limited to one request per device per
second. This exposed a Go-only corruption bug: the client answers the
request with TOKEN_KEYFRAME (134), which the dispatcher treated as a
no-op. That token only appears on forced IDRs because the client's GOP is
effectively infinite, so the dropped IDR left the browser decoding
P-frames against a reference chain it never received, producing
persistent garbling. Relay it as a keyframe instead. Also drop the
cached IDR when the resolution changes, mirroring the C++ server, so a
late joiner cannot receive an old-geometry keyframe.
Add tests for the watch-set transitions and for relaying TOKEN_KEYFRAME.
Co-Authored-By: deepseek-flash
Add keyboard-shortcut (Ctrl+C / Ctrl+X / Ctrl+V) text clipboard transfer
between the browser and the remote desktop, reusing the clipboard protocol
that already exists in the native viewer (COMMAND_SCREEN_GET_CLIPBOARD=24,
COMMAND_SCREEN_SET_CLIPBOARD=25, TOKEN_CLIPBOARD_TEXT=118) so the client
needs no change.
Local -> remote: pressing Ctrl+V reads the browser clipboard, pushes it to
the remote clipboard (UTF-8 -> GBK, matching the client's CF_TEXT/ANSI
handling) and then synthesizes a remote Ctrl+V so the pasted text is the
newly delivered one.
Remote -> local: Ctrl+C or Ctrl+X is forwarded to the remote as usual and,
after a short delay, the remote clipboard is pulled back and written to the
browser clipboard for a later local Ctrl+V.
Both the MFC and Go servers get the same three clipboard signaling paths
(clipboard_set, clipboard_get, clipboard_text) so the shared single-page
frontend behaves identically on either backend.
Co-Authored-By: deepseek-v4-pro
SOCKET_DLLLOADER (210) is the shellcode / memory-DLL loader asking the
server for the full DLL payload before it can load the client. The MFC
master console serves it via SendServerDll; the Go web device port has no
payload to hand out, so every memory-DLL client startup/reconnect fell
into the default dispatch branch and logged "Unhandled command 210",
flooding the log. Add a protocol constant and drop the command silently.
While auditing the device-port logging surface:
- Downgrade wrapTLS's per-connection hex-dump lines and the screen-spy
"[timing]" cold-start line from Info to Debug (they fire once per TCP
connection / screen view and are diagnostics, not operational events).
- Distinguish a sub-connection hijack attempt from a plain orphan: when a
screen/terminal sub-conn claims a MasterID from a source IP other than
the device's login conn, log a dedicated Warn instead of mislabeling it
as "orphan ... unknown device".
Co-Authored-By: deepseek-v4-pro
Verify the HMAC-SHA256 signature and timestamp of device sub-connections
(screen/terminal/file) when the YAMA_CONN_AUTH_KEY environment variable is
set. With the key set, a sub-connection whose signature or clock skew fails
is answered with a non-OK ConnAuth status and dropped; without the key the
legacy always-OK behavior is preserved.
The key is never compiled in: it is read from the environment at startup, so
no secret enters the repository. Source-IP binding in hub.BindScreenConn
remains in place as defense-in-depth.
Co-Authored-By: deepseek-v4-pro
When the web remote desktop is mounted under another domain's subpath
(YAMA_WEB_BASE_PATH non-empty), read the product title from
YAMA_WEB_BRAND_NAME, substitute it for the SimpleRemoter titles and
PWA manifest name, and strip the security notice and website links.
The brand name is JSON- and HTML-escaped so operator input can't
produce malformed output. Served from the domain root, the official
SimpleRemoter branding is left unchanged.
Co-Authored-By: deepseek-v4-pro
Add optional one-way TLS on the device port (6543), enabled per client via a
pinned trust anchor, so new clients encrypt their transport while legacy
plaintext clients keep working unchanged.
Server (server/go): sniff each accepted connection and wrap TLS peers
(ClientHello 0x16 0x03 + handshake type 0x01) in crypto/tls with MinVersion
TLS 1.2; everything else stays on the plaintext path. TLS is enabled only when
both YAMA_TLS_CERT and YAMA_TLS_KEY are set, and a cert/key load failure fails
startup loudly rather than silently serving plaintext.
Client (client/, Windows): Schannel one-way TLS. When the trust anchor is
present — registry value Software\<exehash>\settings\tls_cert (REG_SZ holding
the PEM), with fallback to settings.ini [settings] tls_cert or yama-ca.pem
beside the exe — every outbound connection (main + sub-connections) completes
a TLS 1.2 handshake before the app protocol and is strictly pinned to that
anchor via a chain engine with hExclusiveRoot; any handshake/cert failure is
fail-closed (no plaintext downgrade). Send uses EncryptMessage; Recv uses
DecryptMessage and reads plaintext from the stream-mode DATA segment (bufs[1])
rather than the record header.
Co-Authored-By: deepseek-v4-pro
The TCP device port is exposed directly to the public internet, so a single
host must not be able to exhaust the global connection budget, flood new
connection attempts, or brute-force the device authorization passcode.
- server: cap concurrent connections and the accept rate per source IP
(defaults 256 concurrent / 120 per minute, overridable via
YAMA_PERIP_MAX_CONNS and YAMA_PERIP_CONN_RATE). Rejections happen at
accept time, before any buffer or goroutine is allocated, and a rejected
device simply retries on its reconnect loop.
- cmd: throttle TOKEN_AUTH per source IP (120/min) and answer over-limit
attempts with a normal failed response so clients get a definitive reply.
- web: periodically sweep the login rate-limit maps so the username-keyed
one (which is attacker-controlled) cannot grow without bound.
Per-IP defaults are generous enough that a NAT office whose devices share
one source IP is unaffected.
Co-Authored-By: deepseek-v4-pro
Bridge an already-authenticated portal session into a YAMA web session via
a new /sso endpoint, so portal administrators can enter the remote-desktop
UI without a second login. Only the "admin" portal role is bridged; any
other role (viewer, unknown) still falls back to the built-in login form,
so a low-privileged portal account cannot bypass authentication.
- wsauth: extract IssueToken from VerifyLogin so an out-of-band-authenticated
identity (SSO) can mint a session token without the challenge/response.
- web: add the SSODetector interface, a fail-closed JWT detector (HMAC-only),
and the /sso handler gated to the admin role.
- cmd: enable the JWT detector via YAMA_SSO_JWT_SECRET, the shared HS256
secret matching the parent portal.
- web UI: attempt SSO before showing the login form, falling back to login
when the server returns 401.
- docs: document SSO (admin-only) and license trial-vs-paid troubleshooting
in README and the env example.
Co-Authored-By: deepseek-v4-pro
Add optional YAMA_WEB_BASE_PATH to mount the whole web UI (index, manifest,
static assets, /health, /api/devices, /ws) under a URL prefix such as
/remoter behind a reverse proxy. index.html now uses a __BASE_PATH__
placeholder substituted at serve time, the PWA manifest start_url is rooted
at the base path, and a mount wrapper redirects the bare prefix to prefix/
and strips it before routing. Include nginx, systemd, and env-file deployment
examples for the subpath setup.
The shared placeholder is also handled by the MFC server, which serves from
the domain root and strips __BASE_PATH__ (to "") so its web remote desktop
URLs stay rooted.
Co-Authored-By: deepseek-v4-pro
