netcat: Add a flag to enable the use of SO_REUSEPORT_LB

This is handy for testing purposes. Hide it behind a long option so
that it doesn't conflict with upstream, like we do with several other
fla

netcat: Add a flag to enable the use of SO_REUSEPORT_LB

This is handy for testing purposes. Hide it behind a long option so
that it doesn't conflict with upstream, like we do with several other
flags.

Reviewed by: imp, glebius, delphij
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D48543

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netcat: add --crlf to convert LF into CRLF

This adds the --crlf option to netcat, which triggers translation of \n
characters into \r\n sequences in the input -> network direction.
The Linux version

netcat: add --crlf to convert LF into CRLF

This adds the --crlf option to netcat, which triggers translation of \n
characters into \r\n sequences in the input -> network direction.
The Linux version of nc also supports this functionality with --crlf and
-C. The OpenBSD version uses -C to specify client certificates. Our
version is too old and doesn't have it, but I avoided adding -C anyway
to ease future syncs with upstream.

Attempts to upstream the feature were unsuccessful:
https://marc.info/?t=169282068500001

Differential Revision: https://reviews.freebsd.org/D41489

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netcat: Allow nc to be an if_tun tunnel broker

Reviewed by: kevans
Relnotes: yes
Sponsored by: Zenarmor
Sponsored by: OPNsense
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.

netcat: Allow nc to be an if_tun tunnel broker

Reviewed by: kevans
Relnotes: yes
Sponsored by: Zenarmor
Sponsored by: OPNsense
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D37435

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Add a --sctp flag to nc.

The change adds an SCTP mode akin to UDP mode. This is handy for doing
smoke testing of SCTP.

Use a long option to minimize the risk of option conflicts with OpenBSD.
For

Add a --sctp flag to nc.

The change adds an SCTP mode akin to UDP mode. This is handy for doing
smoke testing of SCTP.

Use a long option to minimize the risk of option conflicts with OpenBSD.
For bonus points, this change unbreaks --no-tcpopt by adding a missing
case required by getopt_long().

Reviewed by: delphij, tuexen
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25610

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Add -M option to nc(1), which makes it print the TCP connection
statistics obtained with stats(3) in JSON format to standard error.

Reviewed by: allanjude, thj, cem (earlier version)
Tested by: thj

Add -M option to nc(1), which makes it print the TCP connection
statistics obtained with stats(3) in JSON format to standard error.

Reviewed by: allanjude, thj, cem (earlier version)
Tested by: thj
MFC after: 2 weeks
Relnotes: yes
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D21324

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Merge ^/head r313301 through r313643.

MFhead@r313360

Merge projects/ipsec into head/.

Small summary
-------------

o Almost all IPsec releated code was moved into sys/netipsec.
o New kernel modules added: ipsec.ko and tcpmd5.ko. New kernel
option

Merge projects/ipsec into head/.

Small summary
-------------

o Almost all IPsec releated code was moved into sys/netipsec.
o New kernel modules added: ipsec.ko and tcpmd5.ko. New kernel
option IPSEC_SUPPORT added. It enables support for loading
and unloading of ipsec.ko and tcpmd5.ko kernel modules.
o IPSEC_NAT_T option was removed. Now NAT-T support is enabled by
default. The UDP_ENCAP_ESPINUDP_NON_IKE encapsulation type
support was removed. Added TCP/UDP checksum handling for
inbound packets that were decapsulated by transport mode SAs.
setkey(8) modified to show run-time NAT-T configuration of SA.
o New network pseudo interface if_ipsec(4) added. For now it is
build as part of ipsec.ko module (or with IPSEC kernel).
It implements IPsec virtual tunnels to create route-based VPNs.
o The network stack now invokes IPsec functions using special
methods. The only one header file <netipsec/ipsec_support.h>
should be included to declare all the needed things to work
with IPsec.
o All IPsec protocols handlers (ESP/AH/IPCOMP protosw) were removed.
Now these protocols are handled directly via IPsec methods.
o TCP_SIGNATURE support was reworked to be more close to RFC.
o PF_KEY SADB was reworked:
- now all security associations stored in the single SPI namespace,
and all SAs MUST have unique SPI.
- several hash tables added to speed up lookups in SADB.
- SADB now uses rmlock to protect access, and concurrent threads
can do SA lookups in the same time.
- many PF_KEY message handlers were reworked to reflect changes
in SADB.
- SADB_UPDATE message was extended to support new PF_KEY headers:
SADB_X_EXT_NEW_ADDRESS_SRC and SADB_X_EXT_NEW_ADDRESS_DST. They
can be used by IKE daemon to change SA addresses.
o ipsecrequest and secpolicy structures were cardinally changed to
avoid locking protection for ipsecrequest. Now we support
only limited number (4) of bundled SAs, but they are supported
for both INET and INET6.
o INPCB security policy cache was introduced. Each PCB now caches
used security policies to avoid SP lookup for each packet.
o For inbound security policies added the mode, when the kernel does
check for full history of applied IPsec transforms.
o References counting rules for security policies and security
associations were changed. The proper SA locking added into xform
code.
o xform code was also changed. Now it is possible to unregister xforms.
tdb_xxx structures were changed and renamed to reflect changes in
SADB/SPDB, and changed rules for locking and refcounting.

Reviewed by: gnn, wblock
Obtained from: Yandex LLC
Relnotes: yes
Sponsored by: Yandex LLC
Differential Revision: https://reviews.freebsd.org/D9352

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Merge from head

Sponsored by: Gandi.net

Merge from head

Merge ^/head r288197 through r288456.

Merge from head

Sync up with head (up to r288341).

MFV r288243: nc from OpenBSD 5.8.

Catch up with HEAD (r280229-r284686).

Merge sync of head

Merge from HEAD

MFV r282611: netcat from OpenBSD 5.7.

MFC after: 2 weeks

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Merge from head@274682

Sync to HEAD@r274095.

MFV r273617: netcat from OpenBSD 5.6.

MFC after: 2 weeks

MFC @ r266724

An SVM update will follow this.

Merge head

IFC @264767