traceroute6: Remove __packed

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Remove CPPFLAGS+=-DUSE_RFC3542, it's not used anymore.

branches: 1.9.42;
Add AS support for traceroute6. While here cleanup both traceroute programs
a bit.
XXX: Error printing on traceroute should be revisited.

Enable WARNS=4 by default, except for:
cpuctl dumplfs hprop ipf iprop-log kadmin kcm kdc kdigest
kimpersonate kstash ktutil makefs ndbootd ntp pppd quot
racoon racoonctl rtadvd sntp sup tcpdchk tcpdmatch tcpdump
traceroute traceroute6 user veriexecgen wsmoused zic
(Mostly third-party applications)

branches: 1.7.20;
Add new Makefile knob, USE_FORT, which extends USE_SSP by turning on the
FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.

This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.

This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.

Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.

Add support for RFC 3542 Adv. Socket API for IPv6 (which obsoletes 2292).
* RFC 3542 isn't binary compatible with RFC 2292.
* RFC 2292 support is on by default but can be disabled.
* update ping6, telnet and traceroute6 to the new API.

From the KAME project (www.kame.net).
Reviewed by core.

use poll(2).

avoid fd_set size overflow. from deraadt@openbsd, sync with kame.

branches: 1.3.4;
Nuke gratuitous setting of BINOWN and BINGRP.

s/CFLAGS/CPPFLAGS/ for -D and -I.

traceroute6: traceroute for IPv6.

TODO: better to be separate, or merged?

Remove -g from SYNOPSIS.

Remove the "-g" option, it uses RH0, which is deprecated by RFC5095, and
doesn't work on modern networks anymore.

branches: 1.17.2;
Fix punctuation markup, remove superfluous Pp.

Expand the traceroute6 man page

- Add a proper description paragraph before launching into describing the
options. More closely follow format of the traceroute(8) man page.
- Improve the wording for some option descriptions.
- Add description what what is printed and define what the possible
annotations mean.

Use Ex.

Remove workaround for ancient HTML generation code.

Sort options. Remove unnecessary quotes and Bk/Ek.

AS additions from Zafer Aydogan to print the AS path. Minor cleanups to compile
without WARNS=1 hackery.

Add description for -r option. Description taken from traceroute man page.

Fix -m description position. From YOMURA Masanori in private mail.

branches: 1.9.4; 1.9.6;
Add -I (use icmp) option as traceroute.
sync w/kame

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

move rcsid to the top

For commands and utilities, use EXIT STATUS rather than RETURN VALUES or
DIAGNOSTICS as appropriate (and documented in mdoc(7)).

print source address of query. support -f (skip first N hops).
do not choke on unexpected ND messages.

branches: 1.4.2;
add missing command line arguments (target and datalen)

Don't pass so many args to .Nd macro. It just overflows.

branches: 1.2.4;
add NetBSD RCS ID.

traceroute6: traceroute for IPv6.

TODO: better to be separate, or merged?

traceroute6: Remove __packed

Clean up the IPsec ifdefs, same as ping6.

... another occurrence of OLDRAWSOCKET ...

Remove dead code.

Remove dead/broken code. We want to favor RFC3542 over RFC2292. No
functional change.

Remove dead code.

Remove now unused code.

Remove the "-g" option, it uses RH0, which is deprecated by RFC5095, and
doesn't work on modern networks anymore.

branches: 1.44.12;
CID 978587: Removed unnecessary check against NULL.

branches: 1.43.12;
PR/47304: Kouki Ooyatsu: -s (source IPv6 address to be used) option does not
work because the wrong variable is used.
XXX: Pullup to 6.

branches: 1.42.2; 1.42.6;
include <netipsec/ipsec.h> rather than <netinet6/ipsec.h> from userland
where possible, for consistency and compatibility to FreeBSD
(exception: KAME specific statistics gathering in netstat(1) and systat(1))

branches: 1.41.4;
Sync usage with manpage.

AS additions from Zafer Aydogan to print the AS path. Minor cleanups to compile
without WARNS=1 hackery.

PR/19069: SUENAGA Hiroki: Original fix was defective because on big endian
the expression is not truncated to 16 bits, thus sending to port 65536 makes
the == 0 test fail and the packet ends up being sent.

synchronize error flags with own comment and with traceroute, as discussed
on tech-net.

branches: 1.37.24; 1.37.26;
PR/19069: Jun-ichiro itojun Hagino: traceroute(8) and traceroute6(8) can
send packet to udp port 0, which is illegal

Add support for RFC 3542 Adv. Socket API for IPv6 (which obsoletes 2292).
* RFC 3542 isn't binary compatible with RFC 2292.
* RFC 2292 support is on by default but can be disabled.
* update ping6, telnet and traceroute6 to the new API.

From the KAME project (www.kame.net).
Reviewed by core.

do not disclose endian/pid. henning@openbsd

do not disclose endian/alignment by probe packet. from dreaadt@openbsd
via kame

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22366, verified by myself.

sysctl/setsockopt takes int, not u_long.

fix arg size to IPV6_UNICAST_HOPS socket option. Hiroki Sato

be more picky about argument parsing (check ERANGE from strtoul). sync w/kame

make args u_long not to lose accuracy due to conversion/overflow.
from mark@openbsd

socklen_t audit. from deraadt, sync w/kame

Fixed trivial bugs in previous commit:
unnecessary socket is opened, and non-root user failed to execute...

Add -I (use icmp) option as traceroute.
sync w/kame

warn if multiple addresses are returned from DNS, like traceroute(8) does.
sync w/kame

no need for struct timezone. From: Kevin Steves <kevin@atomicgears.com>

check port number range. sync w/kame, pointed out by deraadt

use strchr not index

grab max hlim/ttl from kernel via sysctl. sync w/openbsd

typo in port number setting

KNF and other cleanups. from openbsd via kame

sizeof pedant

getopt(3): EOF -> -1.

correct fd_set allocation. from deraadt

use strlcpy/at throughout the code. more strct argument validation.
revoke setuid privilege earlier.

sync with kame.

avoid fd_set size overflow. from deraadt@openbsd, sync with kame.

warnx?/errx? audit (don't pass variable alone). from openbsd.

be more careful about arg to errx?/warnx? (do not pass variable directly,
it may contain "%"). from openbsd, via kame.

branches: 1.11.2;
print source address of query. support -f (skip first N hops).
do not choke on unexpected ND messages.

branches: 1.10.2;
correct use of perror().

typo fix (s/Ridirect/Redirect/)

do not assume CMSG_xx are constant. (sync with latest kame)

use getnameinfo(), not inet_ntop(), as much as possible.
(sync with recent kame)

sync with latest libipsec/kernel.

do not bark even if IPsec is turned off in kernel.

allow "traceroute6 -q1 foo".

KAME PR: 135

add NetBSD RCS ID.

Squash some NULL printf format warnings, providing better error messages
to the user in the process.

traceroute6: traceroute for IPv6.

TODO: better to be separate, or merged?