ipsec: allow it to work with unmapped mbufs

Only map mbuf when a policy is looked up and indicates that IPSEC needs
to transform the packet. If IPSEC is inline offloaded, it is up to the
interface

ipsec: allow it to work with unmapped mbufs

Only map mbuf when a policy is looked up and indicates that IPSEC needs
to transform the packet. If IPSEC is inline offloaded, it is up to the
interface driver to request remap if needed.

Fetch the IP header using m_copydata() instead of using mtod() to select
policy/SA.

Reviewed by: markj
Sponsored by: NVidia networking
Differential revision: https://reviews.freebsd.org/D48265

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ipsec_output(): add mtu argument

Similarly, mtu is needed to decide inline IPSEC offloiad for the driver.

Sponsored by: NVIDIA networking
Differential revision: https://reviews.freebsd.org/D44224

ipsec_output(): add outcoming ifp argument

The information about the interface is needed to coordinate inline
offloading of IPSEC processing with corresponding driver.

Sponsored by: NVIDIA networki

ipsec_output(): add outcoming ifp argument

The information about the interface is needed to coordinate inline
offloading of IPSEC processing with corresponding driver.

Sponsored by: NVIDIA networking
Differential revision: https://reviews.freebsd.org/D44223

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sys/netipsec: fix IPSEC_SUPPORT for non-INET kernels

The functions ipsec_kmod_udp_input() and ipsec_kmod_udp_pcbctl() are
used by netinet6 for IPSEC_SUPPORT, but are guarded behind #ifdef INET.

Sin

sys/netipsec: fix IPSEC_SUPPORT for non-INET kernels

The functions ipsec_kmod_udp_input() and ipsec_kmod_udp_pcbctl() are
used by netinet6 for IPSEC_SUPPORT, but are guarded behind #ifdef INET.

Since neither of these require INET, remove the guard so they're built
even without INET.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1158

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sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

ipsec: add key_havesp_any

Saves on work in a common case of checking both directions.

Note further work in the area is impending to elide these in the common
case to begin with.

Sponsored by: Rubi

ipsec: add key_havesp_any

Saves on work in a common case of checking both directions.

Note further work in the area is impending to elide these in the common
case to begin with.

Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D36485

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Fix kernel build after fcb3f813f379f544f9cd2a10d18045588da0e132 .

By updating function arguments for ipsec_kmod_ctlinput() which is used
when loading IPSEC support via kernel modules.

Differential

Fix kernel build after fcb3f813f379f544f9cd2a10d18045588da0e132 .

By updating function arguments for ipsec_kmod_ctlinput() which is used
when loading IPSEC support via kernel modules.

Differential Revision: https://reviews.freebsd.org/D36731
Sponsored by: NVIDIA Networking

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ipsec: Handle ICMP NEEDFRAG message.

It will be needed for upcoming PMTU implementation in ipsec.
For now simply create/update an entry in tcp hostcache when needed.
The code is based on

ipsec: Handle ICMP NEEDFRAG message.

It will be needed for upcoming PMTU implementation in ipsec.
For now simply create/update an entry in tcp hostcache when needed.
The code is based on https://people.freebsd.org/~ae/ipsec_transport_mode_ctlinput.diff

Authored by: Kornel Duleba <mindal@semihalf.com>
Differential revision: https://reviews.freebsd.org/D30992
Reviewed by: tuxen
Sponsored by: Stormshield
Obtained from: Semihalf

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MFH r338661 through r339200.

Sponsored by: The FreeBSD Foundation

Merge ^/head r338731 through r338987.

Fix witness warning in xform_init().

Do not call crypto_newsession() while holding xforms_lock mutex.
Release mutex before invoking crypto_newsession(), and use
ipsec_kmod_enter()/ipsec_kmod_exit()

Fix witness warning in xform_init().

Do not call crypto_newsession() while holding xforms_lock mutex.
Release mutex before invoking crypto_newsession(), and use
ipsec_kmod_enter()/ipsec_kmod_exit() functions to protect from doing
access to unloaded kernel module memory.

Move xform-releated functions into subr_ipsec.c to be able use
ipsec_kmod_* functions. Also unconditionally build ipsec_kmod_*
functions, since now they are always used by IPSec code.

Add xf_cntr field to struct xformsw, it is used by ipsec_kmod_*
functions. Also constify xf_name field, since it is not expected to be
modified.

Approved by: re (kib)
Differential Revision: https://reviews.freebsd.org/D17302

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Merge ^/head r313644 through r313895.

Fix LINT build for powerpc.

Build kernel modules support only when both IPSEC and TCP_SIGNATURE
are not defined.

Reported by: emaste

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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