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P2P NAP的C实现 P2P在网络应用中越来越流行

   as  adding some new features. The main new feature is that the OpenNap
   servers  are  now  the  default  for  nap. The reason for this is that
   Napster Inc.   has   modified  their  servers  to  use  a  new  client
   authentification  scheme,  which means nap users can no longer connect
   to  their servers. Nap will automatically download a list of available
   servers  from  napigator.com,  and then connect to the first available
   one.

   Other  changes:  A Windows (cygwin32) distribution has been added. Nap
   now  fully  supports  VBR  (variable bitrate) files. Various segfaults
   were  removed.  Commands  such  as  /set,  /alias,  /server  etc. were
   modified  to  do  something  useful  when  no arguments are given. The
   appearance  of the search result screen can now be customized, and the
   result  screen  is not reset when switching back and forth to the main
   screen. A /getservers command was added to read a list of servers from
   napigator.com.  The  /reconnect  command  was modified to cycle to the
   next server on the list, rather than starting from the top of the list
   each  time.  PONG  packages  are  now  ignored by default. The various
   binary distributions are now statically linked, to avoid problems with
   missing  shared  libraries.  This  release  includes  contributions by
   Nufsi,  R黡iger  Kuhlman,  Mark Glines, Steffen Pingel, Matthew Rench,
   and Pawel Fedorynski.

   Nap's  [3]sourceforge  project  page has been updated and is now fully
   operational.  You  are  encouraged to use sourceforge's facilities for
   bug reports, feature requests etc.

   July  1,  2001:  Release 1.4.5. After more than two months, this is an
   overdue  release. I incorporated many patches and bug reports, as well
   as  adding some new features. The main new feature is that the OpenNap
   servers  are  now  the  default  for  nap. The reason for this is that
   Napster Inc.   has   modified  their  servers  to  use  a  new  client
   authentification  scheme,  which means nap users can no longer connect
   to  their servers. Nap will automatically download a list of available
   servers  from  napigator.com,  and then connect to the first available
   one.

   Other  changes:  A Windows (cygwin32) distribution has been added. Nap
   now  fully  supports  VBR  (variable bitrate) files. Various segfaults
   were  removed.  Commands  such  as  /set,  /alias,  /server  etc. were
   modified  to  do  something  useful  when  no arguments are given. The
   appearance  of the search result screen can now be customized, and the
   result  screen  is not reset when switching back and forth to the main
   screen. A /getservers command was added to read a list of servers from
   napigator.com.  The  /reconnect  command  was modified to cycle to the
   next server on the list, rather than starting from the top of the list
   each  time.  PONG  packages  are  now  ignored by default. The various
   binary distributions are now statically linked, to avoid problems with
   missing  shared  libraries.  This  release  includes  contributions by
   Nufsi,  R黡iger  Kuhlman,  Mark Glines, Steffen Pingel, Matthew Rench,
   and Pawel Fedorynski.

   Nap's  [4]sourceforge  project  page has been updated and is now fully
   operational.  You  are  encouraged to use sourceforge's facilities for
   bug reports, feature requests etc.

   April  23,  2001:  Release  1.4.4-ps9.  This  release  has tons of new
   features,  and  in addition the inner workings of nap were re-designed
   in  a major way. There's a possibility for new bugs, although the code
   seems  very  stable.  However,  consider  it a beta release; if you're
   squeamish  about  bugs, consider waiting until the next release before
   you  update.  However,  maybe  you  just  can't live without these new
   features:

     * Queueing.  Nap  is  now  fully able to deal with queued downloads,
       even remotely queued ones. ("Remotely queued" really means we keep
       trying the download until it succeeds). Uploads and downloads that
       are   stopped   (timed   out,   incomplete   etc)  are  no  longer
       automatically  removed  from  the download list; stopped downloads
       can  now be reactivated (although not yet "resumed": the file will
       start  loading  from  0  again).  Total  and  per-user  upload and
       download limits can be set.
     * Sorting. Search results can now be sorted by various criteria.
     * And  more...  Dependency on endianness was reduced; nap should now
       work  reasonably  well,  though  not  yet perfectly, on big-endian
       machines  such  as  Sparc. The command history feature on the main
       screen  was  re-designed. The screen switching code was rewritten,
       removing   more  segfaults.  Usage  messages  for  nap's  internal
       commands  have  been  improved. The suffix for incomplete files is
       now  user configurable. A feature was added to allow passwords and
       email  addresses  for  multiple  users  in  a  single config file.
       Unsuccessful  attempts to connect to a server are now subject to a
       user-configurable  timeout;  this  is useful if you have a list of
       servers  to  connect  to.  Config  files now reside in a directory
       ~/.nap,  rather  than  cluttering  up  your  home directory. (Some
       existing  config files are automatically moved to the new location
       when  you  upgrade).  The  "~/" syntax is now allowed in many path
       names,  particularly  the  upload and download paths, and a sample
       script  for  running nap under screen(1) was added (thanks Massimo
       Dal  Zotto).  File  sizes  on  search  result  screen  can  now be
       displayed  in  bytes  or  megabytes. Searches have a new option to
       limit  the  size  of the files searched for (OpenNap only - thanks
       Sascha  L黡ecke).  Search screen has a new "help" feature. Several
       commands  such  as  /ddown can now take a set of numeric ranges as
       arguments (such as 1-3,5).

   April  19,  2001: Release 1.4.4-ps8. I added a feature which users had
   been  wanting for a long time: now there is an "incomplete" directory,
   where  your  incomplete  downloads  go,  in addition to the "download"
   directory,  where  only  completed  downloads  go.  Downloads that are
   interrupted while they are still incomplete remain in the "incomplete"
   directory (and they are tagged to facilitate a later resume - however,
   resumes  are  not  yet  implemented in this version). Incomplete files
   that  are  too  small  (less  than  100000  bytes  or the value of the
   variable  "turdsize",  if set), are deleted immediately. Other changes
   include: checksums are now calculated in a way even closer to what the
   official Windows client does; fixed cursor positioning bugs of release
   ps7;  fixed  additional  segfaults (notably when pressing Ctrl-T while
   not on a channel); disabled support for dynamically linked user object
   library (was anybody ever using this?); improved debugging output.

   April  16, 2001: Release 1.4.4-ps7 has some new features, and many old
   bugs  fixed.  Fixed  the bug which caused nap to prompt for the user's
   password  even  if  the password was given in the config file. Added a
   "savepass"  user variable to allow passwords to be saved to the config
   file.  All  user variables can now be set on the command line with the
   --option option. Added --nobuild option to avoid building the library.
   Added  autoreply feature which will reply to messages sent to you when
   in  non-interactive  mode  (see "Messages" in the User Guide). Nap now
   replaces  double  quotes  by  single quotes when chatting, rather than
   letting  the  server cut them off. Added some now keybindings, such as
   Ctrl-K for deleting the rest of the line. Finally, automatically check
   online  to  see  if  there is a new release and alert the user if yes.
   This can be turned off by setting nonews=1.

   April  12,  2001:  Release 1.4.4-ps6 is a quick bug fix. A last minute
   bug prevented config files from being created.

   April 12, 2001: Release 1.4.4-ps5 is mainly a bug fix release. I fixed
   two  nasty  bugs  which  caused nap to apparently freeze. One of these
   bugs  was  introduced  in 1.4.4-ps4 and caused nap to starve all other
   connections (including user input) during an upload. The other one was
   an  old  bug  which caused nap to freeze sometimes when switching back
   and  forth  between the main screen and the result screen using F1 and
   F2. Also new in 1.4.4-ps5:
     * Fixed  security  loophole  which  allowed remote clients to access
       arbitrary files on our system.
     * Now nap creates the config file automatically if none exists. This
       eliminates  the  need  to manually create the file .napconf. Also,
       unified  the  concepts  of  user  variables and options set in the
       config file; these are now one and the same thing.
     * Now   nap   automatically   detects  whether  your  library  needs
       rebuilding;  it  is no longer necessary to do this explicitly with
       the "-b" flag.
     * Help   new   users  by  giving  more  meaningful  error  messages,
       particularly  if  one  forgets  to  type "/" at the beginning of a
       command.
     * Added /savechannels and /loadchannels commands to save and restore
       the  channels you're on. Also documented the (previously existing)
       feature of how to do this automatically.
     * Fixed  some  bugs  with  hotlists  that caused segfaults on 64-bit
       machines (Thanks Nikita Schmidt).

   April  9,  2001:  Release  1.4.4-ps4 is a bug fix release. There was a
   fatal  bug  in  1.4.4-ps3 which prevented all uploads (unless you were
   behind  a  firewall).  Please  upgrade  immediately  and  destroy  all
   existing copies of nap-1.4.4-ps3. Also new in 1.4.4-ps4:
     * additional control over what is displayed on the result screen
     * some  command  line  parameters  can  now  be accessed as internal
       variables and manipulated with the commands /set, /unset, /pvars.
     * remaining  id3v2 bug fixed; all id3v2 files should now be sharable
       and downloadable
     * MD5  hashes  are now calculated in the same way that other napster
       clients do it

   Some other features that were added since 1.4.4:
     * Allow  nap  to  run  quietly  in the background, serving files and
       automatically reconnecting whenever the server disconnects
     * Changed   names   and   default  location  of  config  files,  and
       liberalized  their  format  to  allow for comments and whitespace.
       Also prompt user for missing information, rather than croaking.
     * Posix-style long options, and many additional command line options
       for overriding settings in config file
     * Allow  user  to  specify  multiple  napster servers, to connect to
       first available one.
     * Allow  a range of ports (e.g. 6699-6799) for incoming connections:
       specifying  an  unavailable  port  used to force nap into firewall
       mode (relevant e.g. when running two copies of nap).
     * OpenBSD compatibility (Thanks Geoff The)
     * ...and more