Skip to content

go-s7comm v0.7.0

Choose a tag to compare

View all tags
@github-actions github-actions released this 17 Jul 13:58
v0.7.0
0a1d38c
This commit was created on GitHub.com and signed with GitHub’s verified signature.
GPG key ID: B5690EEEBB952194
Verified
Learn about vigilant mode.

Date: 2026-07-17
Previous release: v0.6.3

Summary

  • go-cotp TP0 service: Live client paths use go-cotp v1.0.0-rc.1 (cotp.Connect / ReadTSDU / WriteTSDU). S7 PDUs are exchanged as complete TSDUs; TPKT framing and COTP CR/CC/DT segmentation are owned by go-cotp.
  • Removed transport package: Deleted the local TCP/TPKT wrapper. The client dials TCP and completes the TP0 handshake via go-cotp directly (dial helpers live in client).
  • Dependencies: Direct module dependency is github.com/otfabric/go-cotp only. github.com/otfabric/go-tpkt is transitive via go-cotp (no production or test imports of go-tpkt in this module).
  • wire: Replaced InspectFrame with InspectTPDU (COTP TPDU payload, no TPKT header). Removed obsolete COTP encode helpers from the wire surface/docs (EncodeCOTPCR / EncodeCOTPDT); COTP framing is owned by go-cotp. Non-success Read Var items with transport size 0x00 (Snap7 address faults) parse without error so callers see the item return code.
  • Interop: New interop/ suite (//go:build interop) runs the full snap7-interop v0.1.0 canonical fixture matrix (15 fixtures) against both published servers (native Snap7 and pure-Python) on host ports 1102/2102, rack/slot 0/2. Vendored compiled fixtures under interop/testdata/fixtures/. make interop / CI workflow .github/workflows/interop.yml on every push and PR (pinned GHCR image digests).
  • Docs: README and API.md aligned with the TSDU-based stack, package layout (no transport), tables of contents, interop usage, and v0.7.0.

Breaking changes

  • Package github.com/otfabric/go-s7comm/transport removed. Use go-cotp directly for custom TP0 sessions; the high-level client package already does.
  • wire.InspectFrame replaced by wire.InspectTPDU (input is a COTP TPDU, not a full TPKT frame). FrameSummary.TPKTLength renamed to TPDULength.
Assets 2
Loading