libpcap: Update to 1.10.3

Local changes:

- In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system
net/dlt.h is pulled in from net/bpf.h.
- sys/net/dlt.h: Incorporate changes from libpcap 1.10.3.
- lib/libpcap/Makefile: Update for libpcap 1.10.3.

Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES
Reviewed by: emaste
Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz
Sponsored by: The FreeBSD Foundation

MFV r353141 (by phillip):

Update libpcap from 1.9.0 to 1.9.1.

MFC after: 2 weeks

MFV r333789: libpcap 1.9.0 (pre-release)

MFC after: 1 month
Sponsored by: Mellanox Technologies

MFV r313676: libpcap 1.8.1

MFC after: 1 month

MFV r276759: libpcap 1.6.2.

MFC after: 1 month

MFV: libpcap 1.4.0.

MFC after: 4 weeks

Merge from vendor branch: update libpcap to 1.2.1.

MFC after: 2 weeks

Merge libpcap-1.1.1.

Merge libpcap 1.0.0.

Flatten vendor/libpcap and remove keyword expansion.

Implement zero-copy bpf(4) buffer or "zbuf" support for libpcap. A slightly
different version has been committed upstream in the libpcap vendor branch.
This will allow people to experiment with zero-copy bpf(4) without requiring
external patches.

Note to enable this functionality:

sysctl net.bpf.zerocopy_enable=1

By default, libpcap will use the legacy buffering method unless this sysctl
variable is set to 1.

For the details about zero-copy bpf(4) implementation see svn change r177548.

Requested by: many
Discussed with: sam
In collaboration with: rwatson

Resolve merge conflicts

Approved by: re (kensmith)
Obtained from: tcpdump.org

Import of libpcap v0.9.8

resolve merge conflicts

MFC after: 1 month

Import of libpcap v0.9.4

resolve merge conflicts

Approved by: re (scottl)

Virgin import of libpcap v0.9.1 (release) from tcpdump.org

Approved by: re (scottl)

resolve merge conflicts

Reviewed by: bms (earlier version)

Virgin import of libpcap v0.9.1 (alpha 096) from tcpdump.org

pcap clients should use strlcpy() from the base system libc by default also.

snprintf() and vsnprintf() are part of our base system libc, therefore
pcap should not fall back to its own implementations in the absence of
HAVE_SNPRINTF and HAVE_VSNPRINTF defines when compiled and installed
as part of the world. This should fix builds of pflogd and packages
depending on the base system libpcap.

Reported by: Andrzej Tobola

Merge of libpcap 0.8.3 from tcpdump.org.

Import libpcap 0.8.3, from http://www.tcpdump.org/releases/libpcap-0.8.3.tar.gz

Merge multi-DLT support.

Commit tcpdump.org's multi-DLT support to vendor branch.

Merge libpcap 0.7.1

MFC after: 2 weeks

Import libpcap 0.7.1, from
http://www.tcpdump.org/release/libpcap-0.7.1.tar.gz

Merge libpcap 0.6.2

Virgin import of tcpdump.org libpcap v0.6.2

Merge libpcap 0.5

Virgin import of tcpdump.org libpcap v0.5

None of the header files for the packet capture library
are suitable to include in a C++ file.

PR: 7229
Reviewed by: phk
Submitted by: Craig Spannring <cts@internetcds.com>

Virgin import of libpcap 0.3

Virgin import of LBL libpcap version 0.2.1.
Obtained from: ftp://ftp.ee.lbl.gov/libpcap.tar.Z on 19-Aug-1996.

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.

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

Implement zero-copy bpf(4) buffer or "zbuf" support for libpcap. A slightly
different version has been committed upstream in the libpcap vendor branch.
This will allow people to experiment with zero-copy bpf(4) without requiring
external patches.

Note to enable this functionality:

sysctl net.bpf.zerocopy_enable=1

By default, libpcap will use the legacy buffering method unless this sysctl
variable is set to 1.

For the details about zero-copy bpf(4) implementation see svn change r177548.

Requested by: many
Discussed with: sam
In collaboration with: rwatson

Resolve merge conflicts

Approved by: re (kensmith)
Obtained from: tcpdump.org

Import of libpcap v0.9.8

resolve merge conflicts

MFC after: 1 month

Import of libpcap v0.9.4

resolve merge conflicts

Approved by: re (scottl)

Virgin import of libpcap v0.9.1 (release) from tcpdump.org

Approved by: re (scottl)

resolve merge conflicts

Reviewed by: bms (earlier version)

Virgin import of libpcap v0.9.1 (alpha 096) from tcpdump.org

pcap clients should use strlcpy() from the base system libc by default also.

snprintf() and vsnprintf() are part of our base system libc, therefore
pcap should not fall back to its own implementations in the absence of
HAVE_SNPRINTF and HAVE_VSNPRINTF defines when compiled and installed
as part of the world. This should fix builds of pflogd and packages
depending on the base system libpcap.

Reported by: Andrzej Tobola

Merge of libpcap 0.8.3 from tcpdump.org.

Import libpcap 0.8.3, from http://www.tcpdump.org/releases/libpcap-0.8.3.tar.gz

Merge multi-DLT support.

Commit tcpdump.org's multi-DLT support to vendor branch.

Merge libpcap 0.7.1

MFC after: 2 weeks

Import libpcap 0.7.1, from
http://www.tcpdump.org/release/libpcap-0.7.1.tar.gz

Merge libpcap 0.6.2

Virgin import of tcpdump.org libpcap v0.6.2

Merge libpcap 0.5

Virgin import of tcpdump.org libpcap v0.5

None of the header files for the packet capture library
are suitable to include in a C++ file.

PR: 7229
Reviewed by: phk
Submitted by: Craig Spannring <cts@internetcds.com>

Virgin import of libpcap 0.3

Virgin import of LBL libpcap version 0.2.1.
Obtained from: ftp://ftp.ee.lbl.gov/libpcap.tar.Z on 19-Aug-1996.