https://gitlab.synchro.net/main/sbbs/-/commit/faf6902e71d543abc2d818b8
Modified Files:
src/sbbs3/sftp.cpp src/sftp/sftp.h sftp_client.c sftp_common.c sftp_server.c src/syncterm/sftp_browser.c sftp_queue.c
Log Message:
SFTP: sha1s/md5s/descs extensions, hash-verified compare, history drop-on-connect

Library: two new handshake extensions ([email protected], [email protected]) carry the raw binary digest as a file-attribute extension; a third ([email protected]) is an on-demand SSH_FXP_EXTENDED query that takes a
path and returns the extdesc string as SSH_FXP_EXTENDED_REPLY. Adds sftpc_descs(), sftps_send_extended_reply(), and sftp_rx_get_string() for
the server-side extended callback to parse args. Also fixes a missing
break in the SSH_FXP_EXTENDED dispatch case.

Server (sbbs3/sftp.cpp): implements the descs handler — walks the path through path_map, smb_findfile + smb_getfile(file_detail_extdesc), sends
back file.extdesc. Wires sftp_state->extended. Also fixes a dormant
C++ bug in path_map(const char*, ...) — it tried to delegate by
instantiating a temporary in the body, which left the real object with
result_ = MAP_FAILED. Delegation now goes through the member init list.

SyncTERM browser: when size matches, the local-compare now verifies via
SHA-1 or MD5 (preferring SHA-1) if the server advertised a hash for the
file; otherwise falls back to mtime. F2 on a highlighted file queries
the descs extension and displays the extended description in a
scrollable popup. Queue history is dropped at connect time — DONE /
FAILED / CANCELLED rows from the previous session aren't reloaded, so
each session starts with just its still-pending transfers.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

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