Felix Rieseberg b74e6c7b0a Fix guest TCP recv() stalling when v86 NE2000 TX ring wraps (#363) ...

* Fix guest TCP recv() stalling under concurrent traffic

v86's fake_network stores TCPConnection routing fields (hsrc/hdest/
psrc/pdest) as zero-copy subarrays of the SYN frame, which is itself a
view into the NE2000 TX ring. Win95's driver uses a 12-slot ring; once
it wraps (any concurrent SMB/NBNS/ping while waiting for an upstream
reply), pump() emits segments with whatever IP now occupies that slot,
the guest RSTs them, and recv() blocks forever.

- libv86.js: copy the four address arrays at TCPConnection construction
  (matches felixrieseberg/v86@dd13099c on fake-network-copy-tcp-addrs,
  now merged into windows95-base)
- tools/probe-tcp.sh + net/tcp-trace.ts + tcp-relay.ts test stub +
  debug-harness WIN95_PROBE_RUN2: end-to-end regression harness
  (boot → ping -t → telnet → async write after ring wrap → assert ACK).
  All env-gated, no production-path change.
- docs/v86-patches.md: tracker for all fork patches + upstream PR state
- update-v86 SKILL.md: cross-link and new fork-branch entry

* Drop checked-in upstream PR description

Belongs on the GitHub PR, not in the repo.

2026-04-12 08:03:03 -07:00

..

probe-win95

Enable CD-ROM via a synchronous fs-backed buffer (#362)

2026-04-11 19:31:57 -07:00

update-v86

Fix guest TCP recv() stalling when v86 NE2000 TX ring wraps (#363)

2026-04-12 08:03:03 -07:00