@section Plain packet
Plain packet contains either the whole file, or file request (freq), or
-transition packet or email message. It is called "plain", because it
+transition packet or exec message. It is called "plain", because it
contains plaintext, but plain packets would never be stored on your hard
drive.
@verbatim
HEADER
-+-------------------------------+--...---+
-| MAGIC | TYPE | PATHLEN | PATH | PAYLOAD|
-+-------------------------------+--...---+
++--------------------------------------+--...---+
+| MAGIC | TYPE | NICE | PATHLEN | PATH | PAYLOAD|
++--------------------------------------+--...---+
@end verbatim
@multitable @columnfractions 0.2 0.3 0.5
@verb{|N N C P P 0x00 0x00 0x01|}
@item Payload type @tab
unsigned integer @tab
- 0 (file), 1 (freq), 2 (mail), 3 (transition)
+ 0 (file), 1 (freq), 2 (exec), 3 (transition)
+@item Niceness @tab
+ unsigned integer @tab
+ 1-255, preferred packet @ref{Niceness, niceness} level
@item Path length @tab
unsigned integer @tab
actual length of @emph{path} field's payload
@itemize
@item UTF-8 encoded destination path for file transfer
@item UTF-8 encoded source path for file request
- @item UTF-8 encoded, space separated, email recipients list
+ @item UTF-8 encoded, zero byte separated, exec's arguments
@item Node's id the transition packet must be relayed on
@end itemize
@end multitable
@itemize
@item File contents
@item Destination path for freq
-@item @url{http://zlib.net/, zlib} compressed email
+@item @url{http://zlib.net/, zlib} compressed exec body
@item Whole encrypted packet we need to relay on
@end itemize
+Also depending on packet's type, niceness level means:
+
+@itemize
+@item Preferable niceness level for files sent by freq
+@item @env{NNCP_NICE} variable's value passed during @ref{CfgExec} invocation.
+@end itemize
+
@node Encrypted
@section Encrypted packet