traceroute: Lint manuals

Fix a number of warning mandoc -Tlint and igor turned up. No changes
intended.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/901

traceroute: Standardize usage

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/901

traceroute6: remove -l flag

The -l flag was used to tell traceroute6(8) to show both hostname and
address for each hop. However, traceroute(8) already does this by
default, and there's no reason for traceroute6 to behave differently.

Make this the default behaviour, and accept -l for backward
compatibility as a no-op flag.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1023

traceroute6: Implement ECN bleaching detection

Explicit Congestion Notification (ECN) is a mechanism that allows
end-to-end notification of network congestion without dropping packets
by explicitly setting the ECN code point (2 bits).

Per RFC 8087, section 3.5, network devices should not be configured to
change the ECN code point in the packets that they forward, except to
set the CE (Congestion Experienced) code point ('11') to signal
incipient congestion.

The current commit adds an -E flag to traceroute6 that crafts a packet
with an ECT(1) code point ('01').

If the packet is received back with a zero ECN code point ('00'), it
outputs that the hop in question erases or "bleaches" the ECN code point
values. Bleaching may occur for various reasons (including normalizing
packets to hide which equipment supports ECN). This policy prevents the
use of ECN by applications.

If the packet is received back with an all-ones ECN code point ('11'),
it outputs that the hop in question is experiencing "congestion".

If the packet is received back with a different ECN code point ('10'),
it outputs that the hop in question changes or "mangles" the ECN code
point values.

If the packet is received with the same ECN code point that was sent
('01'), it outputs that the hop has "passed" the ECN bits appropriately.

Inspired by: Darwin
Reviewed by: imp, markj
MFC after: 1 month
Pull Request: https://github.com/freebsd/freebsd-src/pull/879

Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

ping: fix some man pages and tests after r368045

MFC-with: r368045

Fix a few mandoc issues

- no blank before trailing delimiter
- whitespace at end of input line
- sections out of conventional order
- normalizing date format
- AUTHORS section without An macro

Add a -t option to traceroute6 to control the traffic class used when
sending probe packets.

Reviewed by: rscheff
MFC after: 1 week
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D26410

Add support for ICMPv6 messages indicating a parameter problem related
to an unrecognized next header.

MFC after: 2 weeks

Fix in the documentation that the default hop limit is not 30, but
the value of the sysctl variable net.inet6.ip6.hlim.
This is true since
https://svnweb.freebsd.org/base?view=revision&revision=122574
The default of 30 (which was correct up to r122574) was incorrectly
documented in
https://svnweb.freebsd.org/base?view=revision&revision=130268

Thanks to Timo Voelker for makeing me aware of the inconsistency
between to code and the documentation.

MFC after: 3 days

When using SCTP for sending probe packets, use INIT chunks for payloads
larger than or equal to 32 bytes. For smaller probe packets, keep using
SHUTDOWN-ACK chunks, possibly bundled with a PAD chunk.
Packets with INIT chunks more likely pass through firewalls. Therefore,
use them when possible.

MFC after: 1 week

Add SCTP and TCP as protocols for sending probe packets.

MFC after: 4 weeks

* Update function definitions.
* Ensure that the datalen always describes the length after the IPv6
header consistently, not matter which protocol us used for probes..
* Document that the default length is 20, not 12.
* Don't send inormation in probe packets which is not needed or
even checked when the responses are processed.
* Address CID 978587.

This is mainly a cleanup preparing the addition of SCTP and TCP
as possible probe packet protocols.

MFC after: 4 weeks

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

MFC r196475:
- Add AS lookup functionality to traceroute6(8) as well.
- Support for IPv6 transport for AS lookup.
- Introduce $RA_SERVER to set whois server.
- Support for 4 byte ASN.
- ANSIfy function declaration in as.c.

Approved by: re (kib)

- Add AS lookup functionality to traceroute6(8) as well.
- Support for IPv6 transport for AS lookup.
- Introduce $RA_SERVER to set whois server.
- Support for 4 byte ASN.
- ANSIfy function declaration in as.c.

Tested by: IHANet folks.

- rename the RETURN VALUES section to EXIT STATUS
- not bumping a date as this is not a real content change

Approved by: ru
MFC after: 3 days

- Import the HEAD csup code which is the basis for the cvsmode work.

Give traceroute6 the ability to traceroute with packets with no
upper layer header (IP PROTO = 59). Useful for testing firewalls.

MFC after: 2 months

- Fix: documentation for -m option was inserted halfway thru the text of -l
option.

PR: docs/90359
Submitted by: Gavin Atkinson <gavin.atkinson@ury.york.ac.uk>
MFC after: 3 days

Copy the description for the -r option from the traceroute(8) man
page. I'm pretty sure that this description applies the same way to
ipv6, and at least mentioning SO_DONTROUTE is better than having no
description at all.

Fixed the misplaced $FreeBSD$.

mdoc(7) fixes.

Add some more details about what traceroute6 does.

Submitted by: Orla McGann <orly@redbrick.dcu.ie>
Obtained from: KAME
MFC after: 2 weeks

Reapply traditionally lost fixes.

- setsockopt/sysctl takes int, not u_long.
- be more picky about argument parsing - like ERANGE.
- use u_long for args, not to lose accuracy/prevent overflow.
- socklen_t audit.
- Add -I (use icmp) option.
- warn if multiple addresses are present for dest.
- no need to pass tz.
- type pedant. check -p range.
- grab hlim from sysctl.
- typo in port number setting.

Obtained from: KAME

The .Nm utility

mdoc(7) police:

Avoid using parenthesis enclosure macros (.Pq and .Po/.Pc) with plain text.
Not only this slows down the mdoc(7) processing significantly, but it also
has an undesired (in this case) effect of disabling hyphenation within the
entire enclosed block.

Sync with recent KAME.
This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.

TODO:
- The definitions of SADB_* in sys/net/pfkeyv2.h are still different
from RFC2407/IANA assignment because of binary compatibility
issue. It should be fixed under 5-CURRENT.
- ip6po_m member of struct ip6_pktopts is no longer used. But, it
is still there because of binary compatibility issue. It should
be removed under 5-CURRENT.

Reviewed by: itojun
Obtained from: KAME
MFC after: 3 weeks

mdoc(7) police: use the new features of the Nm macro.

Sync with latest KAME code.

Obtained from: KAME

Fix miscellaneous mdoc macro argument limit infringements.

PR: 18465
Reported by: Kazu TAKAMUNE <takamune@avrl.mei.co.jp>

Fix typo

Noticed by: hoek

. clear `.Os' macro value since this tool is not KAME only anymore
. add integration note
. avoid `.Nm' value upper case usage

Getaddrinfo(), getnameinfo(), and etc support in libc/net.
Several udp and raw apps IPv6 support.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project