go-mms v1.2.1

Date: 2026-10-28
Previous release: v1.2.0

Summary

Moves to go-cotp v1.1.0,
which arms read and write deadlines per direction, and removes the go-mms
workaround for the shared deadline of go-cotp v1.0.4. No API changes.

Changes

Changed

• go-cotp v1.1.0 (go-tpkt stays at v1.0.1). transport/iso no longer wraps the connection given to go-cotp (splitDeadlineConn and its per-direction deadline handling are removed); Receive passes its context to go-cotp, Send passes the deadline but not the cancellation of its context, so a cancelled request still never abandons a TSDU half-written.
• Receive with an expired context — a context that ends before any octet of the next TSDU arrived returns the context error and leaves the connection usable (it used to abort it); one that ends mid-TSDU aborts the connection. Errors caused by a context match context.Canceled / context.DeadlineExceeded without being wrapped twice. The MMS client reader and the server association timeout behave as before (ErrClosed, ErrAssociationFailed + context.DeadlineExceeded).

Docs

• TIMEOUT_AND_CLOSE.md and RACE_NOTES.md describe go-cotp's per-direction deadlines; the go-cotp entry is removed from KNOWN_LIMITATIONS.md.