Merge ^/head r287527 through r287679.

- Fix SIGSEGV when sa == NULL. NULL check in getnameinfo_inet()
did not work as expected.

- Simplify afdl table lookup.

MFC after: 3 days

Merge r286744-r287584 from head.

Merge ^/head r286858 through r287489.

- snprintf() returns at most size-1 of the chars printed into
the buffer. (n == hostlen) also means the buffer length was
too short.

- Use sdl->sdl_data only when (sdl->sdl_nlen > 0 && sdl->sdl

- snprintf() returns at most size-1 of the chars printed into
the buffer. (n == hostlen) also means the buffer length was
too short.

- Use sdl->sdl_data only when (sdl->sdl_nlen > 0 && sdl->sdl_alen == 0)
to prevent redundant output.

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Print sdl->sdl_data when sdl->sdl_nlen > 0 as link_ntoa(3) does.

MFC after: 1 week

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Sync to HEAD@r274766

Merge from head@274682

Renove faith(4) and faithd(8) from base. It looks like industry
have chosen different (and more traditional) stateless/statuful
NAT64 as translation mechanism. Last non-trivial commits to both
faith(

Renove faith(4) and faithd(8) from base. It looks like industry
have chosen different (and more traditional) stateless/statuful
NAT64 as translation mechanism. Last non-trivial commits to both
faith(4) and faithd(8) happened more than 12 years ago, so I assume
it is time to drop RFC3142 in FreeBSD.

No objections from: net@

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IFH@204581

Merge from head at r201628.

# This hasn't been tested, and there are at least three bad commits
# that need to be backed out before the branch will be stable again.

Add missing IEEE1394 support dropped during merge from NetBSD.

Nuke ascii2addr() and addr2ascii(). They have no consumers anywhere
in FreeBSD, and originated from INRIA IPv6.

Stub out netstat reference to addr2ascii() I mistakenly introduced.
Update misleading

Nuke ascii2addr() and addr2ascii(). They have no consumers anywhere
in FreeBSD, and originated from INRIA IPv6.

Stub out netstat reference to addr2ascii() I mistakenly introduced.
Update misleading man page sections.

Merge NetBSD's getnameinfo() AF_LINK extensions for a portable way to
print link-layer addresses given a sockaddr_dl(), minus the IEEE 1394
bits which don't map directly to our code.

Obtained from: NetBSD (getnameinfo.c)
Discussed on: current (March 2006)

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Return EAI_OVERFLOW instead of EAI_MEMORY when the supplied buffer is
too short. This conforms to RFC3493, POSIX and XPG6.

Obtained from: NetBSD

- Use ANSI C prototype.
- Remove trailing space.

fix signed/unsigned comparison warnings.

Obtained from: NetBSD

Wrong working directory, sorry. The previous patch was what I have
seen in NetBSD's tree, and this one is what I have submitted for review.

Pointy hat to: me

Remove a check about whether sa->sa_len is equal to salen from
getnameinfo(3). POSIX standard does not require a sa_len field
in sockaddr struct, hence such requirement will cause problem
for portab

Remove a check about whether sa->sa_len is equal to salen from
getnameinfo(3). POSIX standard does not require a sa_len field
in sockaddr struct, hence such requirement will cause problem
for portability.

PR: standards/80008
Requested by: Xin Liu <lx@knight.6test.edu.cn>
Reviewed by: freebsd-standards (das)
MFC After: 2 weeks

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Back out the `hiding' of strlcpy and strlcat. Several people
vocally objected to this safety belt.

`Hide' strlcpy and strlcat (using the namespace.h / __weak_reference
technique) so that we don't wind up calling into an application's
version if the application defines them.

Inspired by: qpopper's

`Hide' strlcpy and strlcat (using the namespace.h / __weak_reference
technique) so that we don't wind up calling into an application's
version if the application defines them.

Inspired by: qpopper's interfering and buggy version of strlcpy

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- ntohs() returns unsigned value.
- use strlcpy.
- snprintf can return negative value, so cope with it.
- tweak interface index on interface locals (ff01::/16).
- removed unused macros.
- removed a m

- ntohs() returns unsigned value.
- use strlcpy.
- snprintf can return negative value, so cope with it.
- tweak interface index on interface locals (ff01::/16).
- removed unused macros.
- removed a macro that uses only once (in a trivial context).
- explicitly say goodbye to ENI_xxx.
- constify struct afd.

Obtained from: KAME
MFC after: 1 week

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Make NI_WITHSCOPEID a default (always on), to synchronize
with recent 2553bis.

Obtained from: KAME
MFC after: 3 weeks

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.