MFC r355988-r355990

r355988:
MFV r353141 (by phillip):

Update libpcap from 1.9.0 to 1.9.1.

r355989:
MFV r353143 (phillip):

Update tcpdump from 4.9.2 to 4.9.3.

r355990:
MFV r355890:

Fix libpcap issue #893: check for invalid IPv4 addresses.

This fixes errors such as:

tcpdump -i lagg0 net 999.999.999.999

This was originally discovered on a Red Hat 7.7 server and verified
to also be a bug on FreeBSD.

Obtained from: https://github.com/the-tcpdump-group/libpcap/commit/ \
07070918d5e81a515315b395f334e52589fe0fb
Fixed by: https://github.com/guyharris

MFC r334277, r334376, r334378 and r334418:

MFV r333789: libpcap 1.9.0 (pre-release)

- Update local copy of dlt.h with new DLT types.

Sponsored by: Mellanox Technologies

MFC r313695, r313760, r314769, r314863, r314865, r316125

r313695:
MFV r313676: libpcap 1.8.1

r313760:
MFV r313759: license change for a few headers (4 clause BSD to 3 clause BSD).

X-MFC-with: r313695

r314769:
Remove compatibility with old libpcap.

Differential Revision: https://reviews.freebsd.org/D9606

r314863:
Stop installing pcap-int.h, which is the internal interface for libpcap.

Reference: https://github.com/the-tcpdump-group/libpcap/issues/560
PR: 217221

r314865:
Bump __FreeBSD_version for removal of pcap-int.h.

PR: 217221

r316125:
MFV r316124: Fix build when WITHOUT_INET6.

Reported by: Randy Westlund <rwestlun gmail com>

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFV r276759: libpcap 1.6.2.

MFC after: 1 month

MFV: libpcap 1.4.0.

MFC after: 4 weeks

MFV: libpcap 1.3.0.

MFC after: 4 weeks

Merge from vendor branch: update libpcap to 1.2.1.

MFC after: 2 weeks

Explicitly initialize the packet buffer to NULL after we unmap the zero copy
buffers. This fixes a segfault on exit due to calling free on a bogus pointer.
This should be considered a temporary stop gap fix to avoid the crash. The
complete fix re-shuffles the initializations of some of the clean-up pointers.

The details of the fix can be found in the libpcap git repository:
commit bc8209b71e928870b0f172d43b174ab27ba24394

Proded by: kevlo, rpaulo
MFC after: 2 weeks
Submitted by: Anton Yuzhaninov

Merge libpcap-1.1.1.

Remove remaining references to BIOCSETBUFMODE ifdefs. We now have
another ifdef for zerocopy bpf.

Finish merge of zerocopy bpf.

Merge libpcap 1.0.0.

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

Add three new ioctl(2) commands for bpf(4).

- BIOCGDIRECTION and BIOCSDIRECTION get or set the setting determining
whether incoming, outgoing, or all packets on the interface should be
returned by BPF. Set to BPF_D_IN to see only incoming packets on the
interface. Set to BPF_D_INOUT to see packets originating locally and
remotely on the interface. Set to BPF_D_OUT to see only outgoing
packets on the interface. This setting is initialized to BPF_D_INOUT
by default. BIOCGSEESENT and BIOCSSEESENT are obsoleted by these but
kept for backward compatibility.

- BIOCFEEDBACK sets packet feedback mode. This allows injected packets
to be fed back as input to the interface when output via the interface is
successful. When BPF_D_INOUT direction is set, injected outgoing packet
is not returned by BPF to avoid duplication. This flag is initialized to
zero by default.

Note that libpcap has been modified to support BPF_D_OUT direction for
pcap_setdirection(3) and PCAP_D_OUT direction is functional now.

Reviewed by: rwatson

sigh, put back buffer overflow fix of 1.1.11 that seems to have
not gone into the 0.9.4 release; don't put it on the vendor branch
so we won't lose it on the next import if they continue to lose it

This commit was generated by cvs2svn to compensate for changes in r162012,
which included commits to RCS files with non-trunk default branches.

Import of libpcap v0.9.4

correct dlt buffer alloc; this goes on the vendor branch as it
will be committed there shortly

MFC after: 3 days

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

Approved by: re (scottl)

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

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

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

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

Virgin import of tcpdump.org libpcap v0.6.2

Virgin import of tcpdump.org libpcap v0.5

Virgin import of LBL libpcap v0.4

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.