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 (sha1s@syncterm.net, md5s@syncterm.net) carry the raw binary digest as a file-attribute extension; a third (descs@syncterm.net) 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 Ä 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*, ...) Ä 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 Ä 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) <noreply@anthropic.com>
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https://gitlab.synchro.net/main/sbbs/-/commit/1c0786d644bf61f0d8f695a4
Modified Files:
src/sbbs3/sftp.cpp src/sftp/sftp.h sftp_client.c sftp_common.c sftp_server.c src/syncterm/sftp_browser.c
Log Message:
sftp: add pubdir@syncterm.net extension; sbbs3 advertises /files

Server-to-client one-shot string carried in the SFTP VERSION
extension list. Client advertises name/"1" in INIT; server replies
name/<path> in VERSION when state->pubdir is set. Path is captured
into the client's private state and exposed via sftpc_get_pubdir().

The asymmetric data field is spec-legal (extension-data is opaque
bytes per draft-ietf-secsh-filexfer-02) but doesn't fit the existing table-driven negotiation, so the server masks SFTP_EXT_PUBDIR off
the standard append_extensions() emit and appends name+path manually,
and the client recognises the entry by name and captures the data
explicitly (extension_match() can't fire when the data is the path).

sbbs3/sftp.cpp sets pubdir = SLASH_FILES so SFTP clients land in the
public filebase root. syncterm's SFTP browser now prefers the
advertised pubdir as its initial cwd, falling back to realpath(".")
then "/" for servers that don't offer the extension.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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