Changes

trx: add JSON stats export for WebSDR API

Introduce stats_json.c providing JSON serialization for:
- stats and counters
- rate counters
- BTS state
- TRX/transceiver state
- WebSDR runtime metrics

Add osmobts_get_stats() API to expose these via WebSDR
interface and export it in Emscripten build

This enables programmatic access to data previously available
via VTY (e.g. "show stats", "show bts")

Change-Id: Ifb82adfab879a65ecd222c45e06551983aa90a0f

trx: add JSON stats export for WebSDR API

Introduce stats_json.c providing JSON serialization for:
- stats and counters
- rate counters
- BTS state
- TRX/transceiver state
- WebSDR runtime metrics

Add osmobts_get_stats() API to expose these via WebSDR
interface and export it in Emscripten build

This enables programmatic access to data previously available
via VTY (e.g. "show stats", "show bts")

Change-Id: Ifb82adfab879a65ecd222c45e06551983aa90a0f

trx, bts: add optional WebSDR backend (callback-based transport)

Introduce WebSDR backend enabled via ENABLE_WEBSDR,
adding an alternative callback-based transport alongside
existing socket-based TRX/OSMUX I/O

Implement:
- TRX control via osmotrxlib_process_command()
- TRXD data via apitrx_tx_call()/trx_data_read()
- clock handling via apibts_clock_ind() and external timers
- Osmux integration via ws_osmux_* helpers

Adapt scheduler to support API-based burst submission and
external timer callbacks in WebSDR mode

Disable signal handling, stats and socket I/O when building
with ENABLE_WEBSDR

Add WebSDR API entrypoint, Emscripten build target and
example configuration

Enables running BTS/TRX stack in WebAssembly environments

Change-Id: Idebd588f33afd85021813ad5821391781db683a9

trx: add JSON stats export for WebSDR API

Introduce stats_json.c providing JSON serialization for:
- stats and counters
- rate counters
- BTS state
- TRX/transceiver state
- WebSDR runtime metrics

Add osmobts_get_stats() API to expose these via WebSDR
interface and export it in Emscripten build

This enables programmatic access to data previously available
via VTY (e.g. "show stats", "show bts")

Change-Id: Ifb82adfab879a65ecd222c45e06551983aa90a0f

trx, bts: add optional WebSDR backend (callback-based transport)

Introduce WebSDR backend enabled via ENABLE_WEBSDR,
adding an alternative callback-based transport alongside
existing socket-based TRX/OSMUX I/O

Implement:
- TRX control via osmotrxlib_process_command()
- TRXD data via apitrx_tx_call()/trx_data_read()
- clock handling via apibts_clock_ind() and external timers
- Osmux integration via ws_osmux_* helpers

Adapt scheduler to support API-based burst submission and
external timer callbacks in WebSDR mode

Disable signal handling, stats and socket I/O when building
with ENABLE_WEBSDR

Add WebSDR API entrypoint, Emscripten build target and
example configuration

Enables running BTS/TRX stack in WebAssembly environments

Change-Id: Idebd588f33afd85021813ad5821391781db683a9

bts: guard AMR RTP decoder stub with HAVE_LIBOSMOCODEC_STATIC

Disable dummy osmo_amr_rtp_dec() implementation when
linking against static libosmocodec to avoid symbol
conflicts

Apply to omldummy and virtual BTS models

Change-Id: Ie19ae2013893575a2f74a87af2151034abf57870

trx: add JSON stats export for WebSDR API

Introduce stats_json.c providing JSON serialization for:
- stats and counters
- rate counters
- BTS state
- TRX/transceiver state
- WebSDR runtime metrics

Add osmobts_get_stats() API to expose these via WebSDR
interface and export it in Emscripten build

This enables programmatic access to data previously available
via VTY (e.g. "show stats", "show bts")

Change-Id: Ifb82adfab879a65ecd222c45e06551983aa90a0f

trx, bts: add optional WebSDR backend (callback-based transport)

Introduce WebSDR backend enabled via ENABLE_WEBSDR,
adding an alternative callback-based transport alongside
existing socket-based TRX/OSMUX I/O

Implement:
- TRX control via osmotrxlib_process_command()
- TRXD data via apitrx_tx_call()/trx_data_read()
- clock handling via apibts_clock_ind() and external timers
- Osmux integration via ws_osmux_* helpers

Adapt scheduler to support API-based burst submission and
external timer callbacks in WebSDR mode

Disable signal handling, stats and socket I/O when building
with ENABLE_WEBSDR

Add WebSDR API entrypoint, Emscripten build target and
example configuration

Enables running BTS/TRX stack in WebAssembly environments

Change-Id: Idebd588f33afd85021813ad5821391781db683a9

trx: factor out clock indication handling into helper

Extract clock indication handling logic into trx_clk_phy()
and reuse it from trx_clk_read_cb()

This separates core FN processing from socket-specific code
and prepares for alternative clock sources (e.g. non-UDP /
in-memory callbacks used in WebSDR/WASM builds).

No functional changes intended

Change-Id: I0e6b3e25da14ada4d0ef86fd4c4e6bbc12e447d2

trx: split TRXD parsing from socket callback

Extract TRXD message parsing into trx_data_read() and
reuse it from trx_data_read_cb()

This decouples parsing from socket I/O and allows reuse
with alternative transports

No functional changes intended

Change-Id: I50ad8b6d2edfd91f2d569cd8badf5c036fbf87ed

abis: add helper to update BTS identity

Introduce abis_update_bts_info() to update site_id and bts_id in
bts_dev_info at runtime

This allows adjusting BTS identity after initialization,
e.g. from external control interfaces

Change-Id: Ibafd66a1e1dc42ad0063c412087bee10d212fe33

trx: split TRX ctrl response parsing from socket callback

Extract TRX control response parsing logic into
trx_ctrl_parse_rsp() and call it from trx_ctrl_read_cb()

This decouples parsing from socket I/O and allows reuse
with alternative transports

No functional changes intended

Change-Id: I255c7d554aad3ac6df2c66716fae1c1fb512110e

smux: allow lchan lookup without remote address

Make rem_addr optional in osmux_lchan_find() by skipping
address comparison when it is NULL

This allows callers without socket-based addressing to
locate lchans by CID only (e.g. callback-based transports)

Change-Id: I7a275dad2353241c7b04cdb5d6cc1436a175c1f3

build: add WebSDR configure option and Emscripten detection

Detect Emscripten toolchain and introduce --with-websdr
configure option

When enabled, check for libosmo-trx-websdr and required
symbol modulateBits, failing configure if missing

Change-Id: Iff4b76e339e2873686c8c15885dd498458ceb546

trx: handle synchronous TRX control callbacks in provision FSM

Set *_sent flags before issuing TRX control commands to ensure
correct state when responses are delivered synchronously
(e.g. WebUSB callback path)

Also guard FSM state handling in st_open_poweroff() to avoid
duplicate transitions if state was already changed by a
synchronous response

No functional change for asynchronous (socket-based) backends

Change-Id: I50c95e3796839e9fe721bff6f96fed4c490c6018

trx: factor out TRXD data submission helper

Extract TRXD data sending into trx_data_submit_msg() and
reuse it from trx_if_send_burst()

This separates transport-specific I/O from message construction
and prepares for alternative backends

No functional changes intended

Change-Id: Ie89ac6efe2f5af0b4cbe5a259a18770b8d2de859

trx: factor out burst submission into helper

Extract TRXD burst submission logic from bts_sched_flush_buffers()
into trx_sched_submit_bursts()

No functional changes intended, this prepares for alternative
backends reusing the same scheduling logic

Change-Id: I7ce61bee4ca7ca50ef190982f1a0e4ce57c8c838

trx: factor out TRX ctrl message submission

Extract TRX control message sending logic into
trx_ctrl_submit_msg() and reuse it from trx_ctrl_send()

This separates message construction from transport-specific
submission and prepares for alternative backends

No functional changes intended

Change-Id: Ibbd50117db4531efbc374e43e3802f9f995362cd

build: make sched_* usage optional

Add configure checks for sched_* APIs and guard usage of
sched_setscheduler with HAVE_SCHED_SETSCHEDULER.

This avoids build/runtime issues on platforms without
scheduler support.

Change-Id: I5af357c1e2074fa1e05ac6bc20af8535c474d906

trx: factor out FN timer processing into common helper

Extract core FN timer handling logic into trx_fn_timer_process()
to decouple it from timerfd-specific code.

This allows reusing the same scheduling logic for alternative
timer backends (e.g. WebSDR) while keeping timerfd integration
as a thin wrapper.

No functional changes intended.

Change-Id: Ia28cce57afb3dc97c8655e855ebd5ace7e096648