Clean up logging in ftpd:
- hold relevant data in new SERVER-STATE fluid - specify log destination as a port, not a file
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sperber
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a44ab62741
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eb20aec688
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@ -1,4 +1,4 @@
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\chapter{FTP server}\label{cha:ftpd}
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\chapter{FTP Server}\label{cha:ftpd}
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The \ex{ftpd} structure contains a complete anonymous ftp server.
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@ -38,10 +38,10 @@ the optional second one. Here they are:
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represented as a list of strings, one for each line of output.
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\end{desc}
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\defun{with-logfile}{file-name [options]}{options}
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\defun{with-log-port}{output-port [options]}{options}
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\begin{desc}
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If this is non-\sharpf, ex{ftpd} makes a log entry for each file
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sent or retrieved in \var{file-name}. Defaults to \sharpf.
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If this is non-\sharpf, ex{ftpd} outputs a log entry for each file
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sent or retrieved on \var{output-port}. Defaults to \sharpf.
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\end{desc}
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\defun{with-dns-lookup?}{boolean [options]}{options}
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@ -23,12 +23,12 @@
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(define-record-type ftpd-options :ftpd-options
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(really-make-ftpd-options port anonymous-home banner
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logfile dns-lookup?)
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log-port dns-lookup?)
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ftpd-options?
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(port ftpd-options-port set-ftpd-options-port!)
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(anonymous-home ftpd-options-anonymous-home set-ftpd-options-anonymous-home!)
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(banner ftpd-options-banner set-ftpd-options-banner!)
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(logfile ftpd-options-logfile set-ftpd-options-logfile!)
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(log-port ftpd-options-log-port set-ftpd-options-log-port!)
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(dns-lookup? ftpd-options-dns-lookup? set-ftpd-options-dns-lookup?!))
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(define (make-default-ftpd-options)
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@ -45,7 +45,7 @@
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(really-make-ftpd-options (ftpd-options-port options)
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(ftpd-options-anonymous-home options)
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(ftpd-options-banner options)
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(ftpd-options-logfile options)
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(ftpd-options-log-port options)
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(ftpd-options-dns-lookup? options)))
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(define (make-ftpd-options-transformer set-option!)
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@ -62,8 +62,8 @@
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(make-ftpd-options-transformer set-ftpd-options-anonymous-home!))
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(define with-banner
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(make-ftpd-options-transformer set-ftpd-options-banner!))
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(define with-logfile
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(make-ftpd-options-transformer set-ftpd-options-logfile!))
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(define with-log-port
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(make-ftpd-options-transformer set-ftpd-options-log-port!))
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(define with-dns-lookup?
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(make-ftpd-options-transformer set-ftpd-options-dns-lookup?!))
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@ -77,10 +77,18 @@
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(loop (transformer value options)
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(cddr stuff))))))
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(define-record-type server-state :server-state
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(really-make-server-state log-lock log-port)
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server-state?
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(log-lock server-state-log-lock)
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(log-port server-state-log-port))
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(define (make-server-state log-port)
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(really-make-server-state (make-lock) log-port))
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(define-record-type session :session
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(really-make-session control-input-port
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control-output-port
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logfile-lock
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logged-in?
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authenticated?
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anonymous?
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@ -91,14 +99,12 @@
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reply-code
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type
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data-socket
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passive-socket
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maybe-log-port)
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passive-socket)
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session?
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(control-input-port session-control-input-port
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set-session-control-input-port!)
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(control-output-port session-control-output-port
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set-session-control-output-port!)
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(logfile-lock session-logfile-lock)
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(logged-in? session-logged-in?
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set-session-logged-in?!)
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(authenticated? session-authenticated?
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@ -120,13 +126,10 @@
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(data-socket session-data-socket
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set-session-data-socket!)
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(passive-socket session-passive-socket
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set-session-passive-socket!)
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(maybe-log-port session-maybe-log-port
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set-session-maybe-log-port!))
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set-session-passive-socket!))
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(define (make-session input-port output-port maybe-log-port)
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(define (make-session input-port output-port)
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(really-make-session input-port output-port
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(make-lock)
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#f ; logged-in?
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#f ; autenticated?
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#f ; anonymous?
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@ -138,10 +141,10 @@
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'ascii ; type
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#f ; data-socket
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#f ; passive-socket
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maybe-log-port
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))
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(define session (make-fluid #f))
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(define server-state (make-fluid #f))
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(define options (make-fluid #f))
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(define (make-session-selector selector)
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@ -156,8 +159,6 @@
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(make-session-selector session-control-input-port))
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(define the-session-control-output-port
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(make-session-selector session-control-output-port))
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(define the-session-logfile-lock
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(make-session-selector session-logfile-lock))
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(define the-session-logged-in? (make-session-selector session-logged-in?))
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(define the-session-authenticated? (make-session-selector session-authenticated?))
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@ -170,7 +171,6 @@
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(define the-session-type (make-session-selector session-type))
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(define the-session-data-socket (make-session-selector session-data-socket))
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(define the-session-passive-socket (make-session-selector session-passive-socket))
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(define the-session-maybe-log-port (make-session-selector session-maybe-log-port))
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(define set-the-session-control-input-port!
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(make-session-modifier set-session-control-input-port!))
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@ -198,8 +198,19 @@
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(make-session-modifier set-session-data-socket!))
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(define set-the-session-passive-socket!
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(make-session-modifier set-session-passive-socket!))
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(define set-the-session-maybe-log-port!
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(make-session-modifier set-session-maybe-log-port!))
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(define (make-server-state-selector selector)
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(lambda ()
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(selector (fluid server-state))))
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(define (make-server-state-modifier setter)
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(lambda (value)
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(setter (fluid server-state) value)))
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(define the-server-state-log-lock
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(make-server-state-selector server-state-log-lock))
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(define the-server-state-log-port
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(make-server-state-selector server-state-log-port))
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(define (make-ftpd-options-selector selector)
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(lambda ()
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@ -211,8 +222,8 @@
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(make-ftpd-options-selector ftpd-options-anonymous-home))
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(define the-ftpd-options-banner
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(make-ftpd-options-selector ftpd-options-banner))
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(define the-ftpd-options-logfile
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(make-ftpd-options-selector ftpd-options-logfile))
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(define the-ftpd-options-log-port
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(make-ftpd-options-selector ftpd-options-log-port))
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(define the-ftpd-options-dns-lookup?
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(make-ftpd-options-selector ftpd-options-dns-lookup?))
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@ -261,52 +272,34 @@
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; 1 RFC931 Authentication
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; 13 authenticated user id (if available, '*' otherwise)
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;
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(define file-log
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(let ((maybe-dns-lookup (lambda (ip)
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(if (the-ftpd-options-dns-lookup?)
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(or (dns-lookup-ip ip)
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ip))
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ip)))
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(lambda (start-transfer-seconds info full-path direction)
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(if (the-session-maybe-log-port)
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(define (file-log start-transfer-seconds info full-path direction)
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(if (the-server-state-log-port)
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(begin
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(obtain-lock (the-session-logfile-lock))
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(format (the-session-maybe-log-port)
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(obtain-lock (the-server-state-log-lock))
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(format (the-server-state-log-port)
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"~A ~A ~A ~A ~A ~A _ ~A a nop@ssword ftp 0 *~%"
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(format-date "~a ~b ~d ~H:~M:~S ~Y" (date)) ; current date and time
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(- (current-seconds) start-transfer-seconds) ; transfer time in secs
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(format-date "~a ~b ~d ~H:~M:~S ~Y" (date))
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(- (current-seconds) start-transfer-seconds)
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(maybe-dns-lookup
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(socket-address->string
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(socket-remote-address (the-session-data-socket)) #f)) ; remote host ip
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(file-info:size info) ; file size in bytes
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(socket-remote-address (the-session-data-socket)) #f))
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(file-info:size info)
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(string-map (lambda (c)
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(if (eq? c #\space) #\_ c))
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full-path) ; name of file (spaces replaced by "_")
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full-path)
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(case (the-session-type)
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((ascii) "a")
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((image) "b")
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(else "?")) ; transfer type
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direction ; incoming / outgoing file
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; anonymous access
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; password (no password given)
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; service name
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; authentication mode
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; authenticated user id'
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)
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(force-output (the-session-maybe-log-port))
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(release-lock (the-session-logfile-lock)))))))
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(else "?"))
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direction)
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(force-output (the-server-state-log-port))
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(release-lock (the-server-state-log-lock)))))
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(define (maybe-open-logfile maybe-logfile)
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(with-errno-handler
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((errno packet)
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(else
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(format (current-error-port)
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"[ftpd] Warning: Unable to write logs to ~S. Logging is now made to (current-error-port).~%[ftpd] (To disable logging at all, either leave the logfile argument or give #f as logfile)~%"
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maybe-logfile)
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(current-error-port)))
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(and maybe-logfile
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(open-output-file maybe-logfile
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(bitwise-ior open/create open/append)))))
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(define (maybe-dns-lookup ip)
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(if (the-ftpd-options-dns-lookup?)
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(or (dns-lookup-ip ip)
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ip)
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ip))
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;;; CONVERTERS ------------------------------------------------
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(define (protocol-family->string protocol-family)
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@ -338,12 +331,11 @@
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#f
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(lambda ()
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(log (syslog-level notice)
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"starting daemon on port ~D with ~S as anonymous home and logfile ~S"
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"starting daemon on port ~D with ~S as anonymous home"
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(ftpd-options-port ftpd-options)
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(expand-file-name (ftpd-options-anonymous-home ftpd-options)
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(cwd))
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(ftpd-options-logfile ftpd-options))
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(let ((maybe-log-port (maybe-open-logfile (ftpd-options-logfile ftpd-options))))
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(cwd)))
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(let ((the-server-state (make-server-state (ftpd-options-log-port ftpd-options))))
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(bind-listen-accept-loop
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protocol-family/internet
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(lambda (socket address)
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@ -355,10 +347,11 @@
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socket
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address
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remote-address
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maybe-log-port)))))
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the-server-state)))))
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(ftpd-options-port ftpd-options))))))
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(define (handle-connection-encapsulated ftpd-options socket address remote-address maybe-log-port)
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(define (handle-connection-encapsulated ftpd-options socket address remote-address
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the-server-state)
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(call-with-current-continuation
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(lambda (exit)
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(with-errno-handler*
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@ -382,7 +375,7 @@
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(handle-connection ftpd-options
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(socket:inport socket)
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(socket:outport socket)
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maybe-log-port))
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the-server-state))
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(lambda ()
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(log (syslog-level debug)
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"shutting down socket ~S"
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@ -417,7 +410,7 @@
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(handle-connection ftpd-options
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(current-input-port)
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(current-output-port)
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(maybe-open-logfile (ftpd-options-logfile ftpd-options))))))
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(make-server-state (ftpd-options-log-port ftpd-options))))))
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(define (set-ftp-socket-options! socket)
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;; If the client closes the connection, we won't lose when we try to
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@ -431,7 +424,7 @@
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(set-socket-option socket level/socket socket/oob-inline #t))
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(define (handle-connection ftpd-options input-port output-port maybe-log-port)
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(define (handle-connection ftpd-options input-port output-port the-server-state)
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(log (syslog-level debug)
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"handling connection with input port ~A, output port ~A"
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input-port
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@ -447,7 +440,8 @@
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(escape 'fick-dich-ins-knie))
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(lambda ()
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(let-fluids
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session (make-session input-port output-port maybe-log-port)
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session (make-session input-port output-port)
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server-state the-server-state
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options ftpd-options
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(lambda ()
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(display-banner)
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@ -1305,7 +1299,7 @@
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(define (signal-error! code message)
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(replace-reply! code message)
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(signal 'ftpd-error))
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(signal 'ftpd-error code message))
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(define (register-reply! code . messages)
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(if (the-session-reply-code)
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@ -203,7 +203,7 @@
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;; FTP server
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(define-interface ftpd-interface
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(export with-port with-anonymous-home with-banner with-logfile with-dns-lookup?
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(export with-port with-anonymous-home with-banner with-log-port with-dns-lookup?
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make-ftpd-options
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ftpd
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ftpd-inetd))
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