(chicken sort)
srfi-1 srfi-13 matchable base64)
-(define lambdamail-version "LambdaMail v1.0.0")
+(define lambdamail-version "LambdaMail v1.2.0")
(define-record config host port spool-dir user group)
(define-record message to from text user password)
(let loop ((msg (make-empty-message))
(received-messages '()))
(let ((line (smtp-session 'get-line)))
- (when (string? line)
- (print "got " line)
- (cond
- ((smtp-command? "helo" line)
- (smtp-session 'set-helo! (smtp-command-args "helo" line))
- (smtp-session 'send "250 ok")
- (loop msg received-messages))
- ((smtp-command? "ehlo" line)
- (smtp-session 'set-helo! (smtp-command-args "helo" line))
- (smtp-session 'send
- "250-" (config-host config)
- " Hello " (smtp-command-args "ehlo" line))
- (smtp-session 'send "250 AUTH PLAIN")
- ;; (smtp-session 'send "250 STARTTLS")
- (loop msg received-messages))
- ((smtp-command? "auth plain" line)
- (let* ((auth-string (smtp-command-args "auth plain" line))
- (auth-decoded (base64-decode auth-string))
- (auth-list (string-split auth-decoded "\x00"))
- (user (car auth-list))
- (password (cadr auth-list)))
- (smtp-session 'set-user! user)
- (smtp-session 'set-password! password)
- (print "Attempted login, user: " user ", password: " password)
- (smtp-session 'send "235 authentication successful")
- (loop msg received-messages)))
- ((smtp-command? "mail from:" line)
- (message-from-set! msg (smtp-command-args "mail from:" line))
- (smtp-session 'send "250 ok")
- (loop msg received-messages))
- ((smtp-command? "rcpt to:" line)
- (message-to-set! msg (smtp-command-args "rcpt to:" line))
- (smtp-session 'send "250 ok")
- (loop msg received-messages))
- ((smtp-command? "data" line)
- (smtp-session 'send "354 intermediate")
- (let text-loop ((text (conc "Received: from " (smtp-session 'helo) "\n"
- " by " (config-host config) "\n"
- " for " (message-from msg)
- "; " (time-stamp) "\n")))
- (let ((text-line (smtp-session 'get-line)))
- (if (string=? "." text-line)
- (message-text-set! msg text)
- (text-loop (conc text text-line "\n")))))
- (message-user-set! msg (smtp-session 'user))
- (message-password-set! msg (smtp-session 'password))
- (smtp-session 'send "250 ok")
- (loop (make-empty-message) (cons msg received-messages)))
- ((smtp-command? "quit" line)
- (smtp-session 'send "221 closing transmission channel")
- received-messages)
- ((string=? "" (string-trim line))
- (loop msg received-messages))
- (else
- (smtp-session 'send "502 command not implemented")
- (loop msg received-messages)))))))
+ (print "got " line)
+ (if (not (string? line))
+ '() ; Don't keep anything on unexpected termination.
+ (cond
+ ((smtp-command? "helo" line)
+ (smtp-session 'set-helo! (smtp-command-args "helo" line))
+ (smtp-session 'send "250 ok")
+ (loop msg received-messages))
+ ((smtp-command? "ehlo" line)
+ (smtp-session 'set-helo! (smtp-command-args "helo" line))
+ (smtp-session 'send
+ "250-" (config-host config)
+ " Hello " (smtp-command-args "ehlo" line))
+ (smtp-session 'send "250 AUTH PLAIN")
+ ;; (smtp-session 'send "250 STARTTLS")
+ (loop msg received-messages))
+ ((smtp-command? "auth plain" line)
+ (let* ((auth-string (smtp-command-args "auth plain" line))
+ (auth-decoded (base64-decode auth-string))
+ (auth-list (string-split auth-decoded "\x00"))
+ (user (car auth-list))
+ (password (cadr auth-list)))
+ (smtp-session 'set-user! user)
+ (smtp-session 'set-password! password)
+ (print "Attempted login, user: " user ", password: " password)
+ (smtp-session 'send "235 authentication successful")
+ (loop msg received-messages)))
+ ((smtp-command? "mail from:" line)
+ (message-from-set! msg (smtp-command-args "mail from:" line))
+ (smtp-session 'send "250 ok")
+ (loop msg received-messages))
+ ((smtp-command? "rcpt to:" line)
+ (message-to-set! msg (smtp-command-args "rcpt to:" line))
+ (smtp-session 'send "250 ok")
+ (loop msg received-messages))
+ ((smtp-command? "data" line)
+ (smtp-session 'send "354 intermediate")
+ (let text-loop ((text (conc "Received: from " (smtp-session 'helo) "\n"
+ "\tby " (config-host config) "\n"
+ "\tfor " (message-to msg) ";\n"
+ "\t" (time-stamp) "\n")))
+ (let ((text-line (smtp-session 'get-line)))
+ (if (string=? "." text-line)
+ (message-text-set! msg text)
+ (text-loop (conc text text-line "\n")))))
+ (message-user-set! msg (smtp-session 'user))
+ (message-password-set! msg (smtp-session 'password))
+ (smtp-session 'send "250 ok")
+ (loop (make-empty-message) (cons msg received-messages)))
+ ((smtp-command? "quit" line)
+ (smtp-session 'send "221 closing transmission channel")
+ received-messages)
+ ((string=? "" (string-trim line))
+ (loop msg received-messages))
+ (else
+ (smtp-session 'send "502 command not implemented")
+ (loop msg received-messages)))))))
;;; Sending/Delivering messages
;;
(define (deliver-messages config messages)
- (print "**** Attempting delivery of " (length messages) " mail items.")
+ (print "*** Attempting delivery of " (length messages) " mail items.")
(filter (lambda (msg) (not (deliver-message msg config)))
messages))
(let-values (((tcp-in tcp-out) (tcp-connect mail-server 25)))
(let ((smtp-session (make-outgoing-smtp-session tcp-in tcp-out)))
(let ((result (and
- (smtp-session 'expect "220")
+ (smtp-session 'expect "2")
(smtp-session 'send "helo " (config-host config))
- (smtp-session 'expect "250")
+ (smtp-session 'expect "2")
(smtp-session 'send "mail from:" (message-from msg))
- (smtp-session 'expect "250")
+ (smtp-session 'expect "2")
(smtp-session 'send "rcpt to:" (message-to msg))
- (smtp-session 'expect "250")
+ (smtp-session 'expect "2")
(smtp-session 'send "data")
(smtp-session 'expect "354")
(smtp-session 'send (message-text msg))
(smtp-session 'send ".")
- (smtp-session 'expect "250")
+ (smtp-session 'expect "2" "5") ;Do not try again on rejects.
(smtp-session 'send "quit"))))
(close-input-port tcp-in)
(close-output-port tcp-out)
(print "* REMOTE DELIVERY FAILED (unexpected server response)"))
result)))))
+(define (or-list l)
+ (fold (lambda (a b) (or a b)) #f l))
+
(define ((make-outgoing-smtp-session tcp-in tcp-out) . command)
(match command
- (('expect code)
+ (('expect codes ...)
(let ((result (read-line tcp-in)))
- (print "Expecting " code " got " result)
- (string-prefix? code result)))
+ (print "Expecting one of " codes " got " result)
+ (or-list (map (lambda (code) (string-prefix? code result)) codes))))
(('send strings ...)
(print "Sending " (if (> (string-length (car strings)) 30)
(string-take (car strings) 30)
(define (print-usage progname)
(print "Usage:\n"
progname " -h/--help\n"
+ progname " -v/--version\n"
progname " [-u/--user UID] [-g/--group GID] hostname [[port [spooldir]]\n"
"\n"
"The -u and -g options can be used to set the UID and GID of the process\n"
"following the creation of the TCP port listener (which often requires root)."))
+(define (print-version)
+ (print lambdamail-version))
+
(define (main)
(let ((progname (pathname-file (car (argv))))
(config (make-config "" 25 "/var/spool/mail" '() '())))
((or (equal? this-arg "-h")
(equal? this-arg "--help"))
(print-usage progname))
+ ((or (equal? this-arg "-v")
+ (equal? this-arg "--version"))
+ (print-version))
(else
(print "Unknown option " this-arg "\n")
(print-usage progname)))
(main)
;; (define (test)
-;; (run-server (make-config "localhost" 2525 "spool" '() '())))
+ ;; (run-server (make-config "localhost" 2525 "spool" '() '())))
The Lambda Lab / projects / lambdamail.git / blobdiff