Philip [BUG], Was: [Exim] synchronization error (next input …

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Autor: Giuliano Gavazzi
Data:  
Dla: exim-users
Stare tematy: [Exim] synchronization error (next input sent too soon) log error?
Temat: Philip [BUG], Was: [Exim] synchronization error (next input sent too soon) log error?
At 12:17 pm +0200 2004/06/05, Giuliano Gavazzi wrote:
>Once in a while I find these puzzling log entries:
>
>2004-06-05 11:07:10 H=(haus) [200.232.190.165]
>F=<n.chandrasekar@???> rejected RCPT <xxxxx>: unknown user
>on secondary hit: Unrouteable address
>2004-06-05 11:07:10 SMTP protocol violation: synchronization error
>(next input sent too soon): rejected "RCPT TO:<yyyyy>" H=(haus)
>[200.232.190.165] next input="H=(haus) [200.232.190.165]"
>


sorry to follow up myself, but having had a look at the source
(explanation at the end...):

     c = smtp_inend - smtp_inptr;
     if (c > 150) c = 150;
     memcpy(big_buffer, smtp_inptr, c);
     big_buffer[c] = 0;
     incomplete_transaction_log(US"sync failure");
     log_write(0, LOG_MAIN|LOG_REJECT, "SMTP protocol violation: "
       "synchronization error (next input sent too soon): rejected \"%s\" %s "
       "next input=\"%s\"", cmd_buffer, host_and_ident(TRUE),
       string_printing(big_buffer));


how can big_buffer, that should contain the outstanding input stream,
contain the same as host_and_ident? Note that these synchronization
error log lines appear to show all the same behaviour.

I have changed the source to print out c, and its value is smaller
than the length of the string printed! Nonsense.
Also I have tried using directly smtp_inptr instead of
pring_printing(big_buffer) and the log is now (apart formatting)
correct:

2004-06-06 12:23:33 SMTP protocol violation: synchronization error
(next input sent too soon): rejected "MAIL FROM:<xxxxxx>"
H=ns.humph.com (localhost) [217.155.139.146] next input="RCPT
TO:<yyyyy>...

Well, if I do not call host_and_ident the output is correct, so
host_and_ident is changing big_buffer (that is global) as a side
effect.



Giuliano
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