sys/net*: minor spelling fixes.

No functional change.

mdoc: fix rendering issues

Cleanup alias module handler register/unregister.

- Remove locking, since all module(9) events are running under &Giant.
- Use TAILQ for protocol handlers and fix a bug which led to
infinite cycle

Cleanup alias module handler register/unregister.

- Remove locking, since all module(9) events are running under &Giant.
- Use TAILQ for protocol handlers and fix a bug which led to
infinite cycle. Bug found in VirtualBox [1]
- Simplify code everywhere.
- Fix documentation.

[1] https://www.virtualbox.org/pipermail/vbox-dev/2013-November/011936.html

PR: 183792 [1]
Submitted by: Valery Ushakov <uwe NetBSD.org> [1]
Sponsored by: Nginx, Inc.

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- Move AUTHORS and ACKNOWLEDGEMENTS to the end of the page.
- Add myself to list of authors.

mdoc: avoid nested displays. Fixes mandoc warnings.

Fix style nit: don't use leading zero for dates in .Dd

Prompted by: brueffer
Approved by: brueffer
MFC after: 3 days

General mdoc(7) and typo fixes.

PR: 167734
Submitted by: Nobuyuki Koganemaru (kogane!jp.freebsd.org)
MFC after: 3 days

- General grammar and mdoc(7) fixes. [1] [2]
- While here, remove a paragraph about userspace operation that
has been outdated for some time. [2]

PR: 158623
Submitted by: Ben Kudak (kaduk % mit!e

- General grammar and mdoc(7) fixes. [1] [2]
- While here, remove a paragraph about userspace operation that
has been outdated for some time. [2]

PR: 158623
Submitted by: Ben Kudak (kaduk % mit!edu) [1]
Reviewed by: glebius [2]
MFC after: 1 week

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Export AddLink() function from libalias. It can be used when custom
alias address needs to be specified.
Add inbound handler to the alias_ftp module. It helps handle active
FTP transfer mode for the

Export AddLink() function from libalias. It can be used when custom
alias address needs to be specified.
Add inbound handler to the alias_ftp module. It helps handle active
FTP transfer mode for the case with external clients and FTP server behind
NAT. Fix passive FTP transfer case for server behind NAT using redirect with
external IP address different from NAT ip address.

PR: kern/157957
Submitted by: Alexander V. Chernikov

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Document PKT_ALIAS_SKIP_GLOBAL option.

Submitted by: Alexander V. Chernikov

mdoc: drop even more redundant .Pp calls

No change in rendered output, less mandoc lint warnings.

Tool provided by: Nobuyuki Koganemaru n-kogane at syd.odn.ne.jp

Merge the rest of my changes.

Various mdoc and grammar fixes.

Approved by: glebius
Reviewed by: glebius, ru

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/etcet

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

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o Kill BUGS section as it is not valid since rev. 1.4 alias_pptp.c.

Spotted by: ru.unix.bsd activists
MFC after: 1 week

Fix prototype.

Sort sections.

Mechanically kill hard sentence breaks.

Bumped document date.
Fixed markup.
Fixed examples to match the new API.

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 "st

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.

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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 behi

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

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mdoc(7): Use the new feature of the .In macro.

Removed a couple of .Xo/.Xc that are leftovers of the "ninth-argument
limit" mdoc(7) atavism.

Clarify that original address and port when doing transparent proxying
are _destination_ address and port.

Added myself to the AUTHORS section.