changes-2.3

经典的ppp程序

What was new in ppp-2.3.11.
***************************

* Support for Solaris 8 has been added, including support for
  replumbing and IPV6.

* The Solaris `snoop' utility should now work on ppp interfaces.

* New hooks have been added - pap_logout_hook, ip_up_hook, and
  ip_down_hook.

* A new `passprompt' plugin is included, thanks to Alan Curry, which
  makes it possible for pppd to call an external program to get the
  PAP password to send to the peer.

* The error messages for the situation where authentication is
  required because the system has a default route have been improved.

* There is a new connect_delay option which specifies how long pppd
  should pause after the connect script finishes.  Previously this
  delay was fixed at 1 second.  (This delay terminates as soon as pppd
  sees a valid PPP frame from the peer.)

* The `hide-password' option is now the default, and there is a new
  `show-password' option to enable the printing of password strings in
  the debug output.

* A fairly complete list of the names of PPP protocols has been added
  so that when pppd rejects a frame because its protocol is not
  supported, it can print the name of the unsupported protocol.

* Synchronous serial lines are supported under Linux 2.3.x.

* The bug where pppd would not recognize a modem hangup under Linux
  2.3.x kernels has been fixed.


What was new in ppp-2.3.10.
***************************

* Pppd now supports `plugins', which are pieces of code (packaged as
  shared libraries) which can be loaded into pppd at runtime and which
  can affect its behaviour.  The intention is that plugins provide a
  way for people to customize the behaviour of pppd for their own
  needs without needing to change the base pppd source.  I have added
  some hooks into pppd (places where pppd will call a function
  pointer, if non-zero, to replace some of pppd's code) and I will be
  receptive to suggestions about places to add more hooks.  Plugins
  are supported under Linux and Solaris at present.

* We have a new maintainer for the Solaris port, Adi Masputra of Sun
  Microsystems, and he has updated the Solaris port so that it should
  work on 64-bit machines under Solaris 7 and later.

* Pppd now has an `allow-ip' option, which takes an argument which is
  an IP address (or subnet) which peers are permitted to use without
  authenticating themselves.  The argument takes the same form as each
  element of the allowed IP address list in the secrets files.  The
  allow-ip option is privileged and may be specified multiple times.
  Using the allow-ip option should be cleaner than putting a line like
  `"" * "" address' in /etc/ppp/pap-secrets.

* Chat can now substitute environment variables into the script.  This
  is enabled by the -E flag.  (Thanks to Andreas Arens for the patch.)

* If the PAP username and password from the peer contains unprintable
  characters, they will be translated to a printable form before
  looking in the pap-secrets file.  Characters >= 0x80 are translated
  to a M- form, and characters from 0 to 0x1f (and 0x7f as well) are
  translated to a ^X form.  If this change causes you grief, let me
  know what would be a better translation.  It appears that some peers
  send nulls or other control characters in their usernames and
  passwords.

* Pppd has new `ktune' and `noktune' options, which enable/disable
  it to change kernel settings as appropriate.  This is only
  implemented under Linux, and requires the /proc filesystem to be
  mounted.  Under Linux, with the ktune option, pppd will enable IP
  forwarding in the kernel if the proxyarp option is used, and will
  enable the dynamic IP address kernel option in demand mode if the
  local IP address changes.

* Pppd no longer requires a remote address to be specified for demand
  dialling.  If none is specified, it will use a default value of
  10.112.112.112+unit_number.  (It will not propose this default to
  the peer.)

* The default holdoff is now 0 if no connect script is given.

* The IPV6 code from Tommi Komulainen, which I unfortunately only
  partially merged in to ppp-2.3.9, has been fixed and updated.

* The linux compilation glitches should be fixed now.


What was new in ppp-2.3.9.
**************************

* Support for the new generic PPP layer under development for the
  Linux kernel.

* You can now place extra options to apply to specific users at the
  end of the line with their password in the pap-secrets or
  chap-secrets file, separated from the IP address(es) with a "--"
  separator.  These options are parsed after the peer is authenticated
  but before network protocol (IPCP, IPXCP) or CCP negotiation
  commences.

* Pppd will apply the holdoff period if the link was terminated by the
  peer.  It doesn't apply it if the link was terminated because the
  local pppd thought it was idle.

* Synchronous support for Solaris has been added, thanks to John
  Morrison, and for FreeBSD, thanks to Paul Fulghum.

* IPV6 support has been merged in, from Tommi Komulainen.  At the
  moment it only supports Linux and it is not tested by me.

* The `nodefaultip' option can be used in demand mode to say that pppd
  should not suggest its local IP address to the peer.

* The `init' option has been added; this causes pppd to run a script
  to initialize the serial device (e.g. by sending an init string to
  the modem).  Unlike the connect option, this can be used in a
  dial-in situation.  (Thanks to Tobias Ringstrom.)

* There is a new `logfile' option to send log messages to a file as
  well as syslog.

* There is a new, privileged `linkname' option which sets a logical
  name for the link.  Pppd will create a /var/run/ppp-<linkname>.pid
  file containing its process ID.

* There is a new `maxfail' option which specifies how many consecutive
  failed connection attempts are permitted before pppd will exit.  The
  default value is 10, and 0 means infinity. :-)

* Sundry bugs fixed.


What was new in ppp-2.3.8.
**************************

* The exit status of pppd will now indicate whether the link was
  successfully established, or if not, what error was encountered.

* Pppd has two new options: fdlog <n> will send log messages to file
  descriptor <n> instead of standard output, and nofdlog will stop log
  messages from being sent to any file descriptor (they will still be
  sent to syslog).  Pppd now will not send log messages to a file
  descriptor if the serial port is open on that file descriptor.

* Pppd sets an environment variable called PPPLOGNAME for scripts that
  it runs, indicating the login name of the user who invoked pppd.

* Pppd sets environment variables CONNECT_TIME, BYTES_SENT and
  BYTES_RCVD for the ip-down and auth-down scripts indicating the
  statistics for the connection just terminated.  (CONNECT_TIME is in
  seconds.)

* If the user has the serial device open on standard input and
  specifies a symbolic link to the serial device on the command line,
  pppd will detect this and behave correctly (i.e. not detach from its
  controlling terminal).  Furthermore, if the serial port is open for
  reading and writing on standard input, pppd will assume that it is
  locked by its invoker and not lock it itself.

* Chat now has a feature where if a string to be sent begins with an
  at sign (@), the rest of the string is taken as the name of a file
  (regular file or named pipe), and the actual string to send is taken
  from that file.

* Support for FreeBSD-2.2.8 and 3.0 has been added, thanks to Paul
  Fulghum.

* The Tru64 (aka Digital Unix aka OSF/1) port has been updated.

* The system panics on Solaris SMP systems related to PPP connections
  being established and terminated should no longer occur.

* Fixed quite a few bugs.


What was new in ppp-2.3.7.
**************************

* Pppd can now automatically allocate itself a pseudo-tty to use as
  the serial device.  This has made three new options possible:

  - `pty script' will run `script' with its standard input and output
    connected to the master side of the pty.  For example:
	pppd pty 'ssh -t server.my.net pppd'
    is a basic command for setting up a PPP link (tunnel) over ssh.
    (In practice you may need to specify other options such as IP
    addresses, etc.)

  - `notty' tells pppd to communicate over its standard input and
    output, which do not have to be a terminal device.

  - `record filename' tells pppd to record all of the characters sent
    and received over the serial device to a file called `filename'.
    The data is recorded in a tagged format with timestamps, which can
    be printed in a readable form with the pppdump program, which is
    included in this distribution.

* Pppd now logs the connect time and number of bytes sent and received
  (at the level of the serial device) when the connection is
  terminated.

* If you use the updetach or nodetach option, pppd will print its
  messages to standard output as well as logging them with syslog
  (provided of course pppd isn't using its standard input or output as
  its serial device).

* There is a new `privgroup groupname' option (a privileged option).
  If the user running pppd is in group `groupname', s/he can use
  privileged options without restriction.

* There is a new `receive-all' option, which causes pppd to accept all
  control characters, even the ones that the peer should be escaping
  (i.e. the receive asyncmap is 0).  This is useful with some buggy