Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

- Removed a copyright from makefile.
- Added ${.CURDIR} to .include "...".
- Whitespace fixes.

OK'ed by: piso

Summer of Code 2005: improve libalias - part 1 of 2

With the first part of my previous Summer of Code work, we get:

-made libalias modular:

-support for 'particular' protocols (like ftp/irc/etcetc) is no more
hardcoded inside libalias, but it's available through external
modules loadable at runtime

-modules are available both in kernel (/boot/kernel/alias_*.ko) and
user land (/lib/libalias_*)

-protocols/applications modularized are: cuseeme, ftp, irc, nbt, pptp,
skinny and smedia

-added logging support for kernel side

-cleanup

After a buildworld, do a 'mergemaster -i' to install the file libalias.conf
in /etc or manually copy it.

During startup (and after every HUP signal) user land applications running
the new libalias will try to read a file in /etc called libalias.conf:
that file contains the list of modules to load.

User land applications affected by this commit are ppp and natd:
if libalias.conf is present in /etc you won't notice any difference.

The only kernel land bit affected by this commit is ng_nat:
if you are using ng_nat, and it doesn't correctly handle
ftp/irc/etcetc sessions anymore, remember to kldload
the correspondent module (i.e. kldload alias_ftp).

General information and details about the inner working are available
in the libalias man page under the section 'MODULAR ARCHITECTURE
(AND ipfw(4) SUPPORT)'.

NOTA BENE: this commit affects _ONLY_ libalias, ipfw in-kernel nat
support will be part of the next libalias-related commit.

Approved by: glebius
Reviewed by: glebius, ru

Bump the shared library version number of all libraries that have not
been bumped since RELENG_5.

Reviewed by: ru
Approved by: re (not needed for commit check but in principle...)

Build userland libalias using src/sys/netinet/libalias.

Reviewed by: ru
Repocopy by: peter

For variables that are only checked with defined(), don't provide
any fake value.

Push WARNS back up to 6, but define NO_WERROR; I want the warts out in the
open where people can see them and hopefully fix them.

Temporarily lower WARNS to 3 while I figure out the alignment issues on
alpha.

Make libalias WARNS?=6-clean. This mostly involves renaming variables
named link, foo_link or link_foo to lnk, foo_lnk or lnk_foo, fixing
signed / unsigned comparisons, and shoving unused function arguments
under the carpet.

I was hoping WARNS?=6 might reveal more serious problems, and perhaps
the source of the -O2 breakage, but found no smoking gun.

Raise WARNS level to 2.

Mostly mechanical rework of libalias:

Makes it possible to have multiple packet aliasing instances in a
single process by moving all static and global variables into an
instance structure called "struct libalias".

Redefine a new API based on s/PacketAlias/LibAlias/g

Add new "instance" argument to all functions in the new API.

Implement old API in terms of the new API.

Add Cisco Skinny Station protocol support to libalias, natd, and ppp.
Skinny is the protocol used by Cisco IP phones to talk to Cisco Call
Managers. With this code, one can use a Cisco IP phone behind a FreeBSD
NAT gateway.

Currently, having the Call Manager behind the NAT gateway is not supported.
More information on enabling Skinny support in libalias, natd, and ppp
can be found in those applications' manpages.

PR: 55843
Reviewed by: ru
Approved by: ru
MFC after: 30 days

style.Makefile(5)

Stage 3 of dynamic root support. Make all the libraries needed to run
binaries in /bin and /sbin installed in /lib. Only the versioned files
reside in /lib, the .so symlink continues to live /usr/lib so the
toolchain doesn't need to be modified.

style.Makefile(5)

Zap now-unused SHLIB_MINOR

MAN[1-9] -> MAN.

Add -Wmissing-prototypes.

Add address translation support for RTSP/RTP used by RealPlayer and
Quicktime streaming media applications.

Add a BUGS section to the man page.

Submitted by: Erik Salander <erik@whistle.com>

- Removed PacketAliasPptp() API function.
- SHLIB_MAJOR++.

Added true support for PPTP aliasing. Some nice features include:

- Multiple PPTP clients behind NAT to the same or different servers.

- Single PPTP server behind NAT -- you just need to redirect TCP
port 1723 to a local machine. Multiple servers behind NAT is
possible but would require a simple API change.

- No API changes!

For more information on how this works see comments at the start of
the alias_pptp.c.

PacketAliasPptp() is no longer necessary and will be removed soon.

Submitted by: Erik Salander <erik@whistle.com>
Reviewed by: ru
Rewritten by: ru
Reviewed by: Erik Salander <erik@whistle.com>

Replace beforeinstall target with new variables used by .mk system.

Reviewed by: marcel, and make world

$Id$ -> $FreeBSD$

brucify
Mentioned by: sprice@hiwaay.net

Version 3.0: January 1, 1999
- Transparent proxying support added.
- PPTP redirecting support added based on patches
contributed by Dru Nelson <dnelson@redwoodsoft.com>.

Submitted by: Charles Mott <cmott@srv.net>

Remove OpenBSD build support - let the Makefile vary per
OS rather than making it a mess and potentially screwing
up cross builds.
Suggested by: bde

Add Id keyword.

Add OpenBSD build support

Add CUSEEME support. This has *not* been tested, nor
could I find anyone to test it, so please report any
problems to me.

Primary verison of NetBIOS over TCP/IP. Now you can connect Windows
DOMAIN as DOMAIN user through NAT function. See also RFC1002 for
futher detail of SMB structure.

Submitted by: Atsushi Murai <amurai@spec.co.jp>

Teach libalias to work with IPFW firewalls (controlled by a flag).

Obtained from: Yes development tree (+ 10 lines of patches from
Charles Mott, original libalias author)

Upgrade to 2.4 (Fix -PKT_ALIAS_UNREGISTERED_ONLY)
Submitted by: Charles Mott <cmott@srv.net>

Add __libalias_version so that ppp can derive the
correct library name for dlopen()

Fix file descriptor leak.

Submitted by: Charles Mott <cmott@srv.net>
Identified by: Gordon Burditt

Update to version 2.2. Only the PacketAlias*()
functions should now be used. The old 2.1 stuff is
there for backwards compatability.
Submitted by: Charles Mott <cmott@snake.srv.net>

This commit was generated by cvs2svn to compensate for changes in r26026,
which included commits to RCS files with non-trunk default branches.

Create the alias library. This is currently only used by
ppp (or will be shortly). Natd can now be updated to use
this library rather than carrying its own version of the code.

Submitted by: Charles Mott <cmott@srv.net>