Commit Graph

39 Commits

Author SHA1 Message Date
Pedro F. Giffuni
a4641f4eaa sys/net*: minor spelling fixes.
No functional change.
2016-05-03 18:05:43 +00:00
Kevin Lo
ddee45244d Since the IETF has redefined the meaning of the tos field to accommodate
a set of differentiated services, set IPTOS_PREC_* macros using
IPTOS_DSCP_* macro definitions.

While here, add IPTOS_DSCP_VA macro according to RFC 5865.

Differential Revision:	https://reviews.freebsd.org/D3119
Reviewed by:	gnn
2015-07-18 06:48:30 +00:00
Zbigniew Bodek
8018ac153f Change struct attribute to avoid aligned operations mismatch
Previous __alignment(4) allowed compiler to assume that operations are
performed on aligned region. On ARM processor, this led to alignment fault
as shown below:
trapframe: 0xda9e5b10
FSR=00000001, FAR=a67b680e, spsr=60000113
r0 =00000000, r1 =00000068, r2 =0000007c, r3 =00000000
r4 =a67b6826, r5 =a67b680e, r6 =00000014, r7 =00000068
r8 =00000068, r9 =da9e5bd0, r10=00000011, r11=da9e5c10
r12=da9e5be0, ssp=da9e5b60, slr=a054f164, pc =a054f2cc
<...>
udp_input+0x264: ldmia r5, {r0-r3, r6}
udp_input+0x268: stmia r12, {r0-r3, r6}

This was due to instructions which do not support unaligned access,
whereas for __alignment(2) compiler replaced ldmia/stmia with some
logically equivalent memcpy operations.
In fact, the assumption that 'struct ip' is always 4-byte aligned
is definitely false, as we have no impact on data alignment of packet
stream received.

Another possible solution would be to explicitely perform memcpy()
on objects of 'struct ip' type, which, however, would suffer from
performance drop, and be merely a problem hiding.

Please, note that this has nothing to do with
ARM32_DISABLE_ALIGNMENT_FAULTS option, but is related strictly to
compiler behaviour.

Submitted by:  Wojciech Macek <wma@semihalf.com>
Reviewed by:   glebius, ian
Obtained from: Semihalf
2015-02-24 12:57:03 +00:00
Xin LI
74882260fa Add ToS definitions for DiffServ Codepoints as per RFC2474.
Obtained from:	OpenBSD
MFC after:	2 weeks
2012-05-04 21:00:32 +00:00
Luigi Rizzo
dc5fd2595c use u_char instead of u_int for short bitfields.
For our compiler the two constructs are completely equivalent, but
some compilers (including MSC and tcc) use the base type for alignment,
which in the cases touched here result in aligning the bitfields
to 32 bit instead of the 8 bit that is meant here.

Note that almost all other headers where small bitfields
are used have u_int8_t instead of u_int.

MFC after:	3 days
2010-02-01 14:13:44 +00:00
Luigi Rizzo
d685b6ee05 Use uint32_t instead of n_long and n_time, and uint16_t instead of n_short.
Add a note next to fields in network format.

The n_* types are not enough for compiler checks on endianness, and their
use often requires an otherwise unnecessary #include <netinet/in_systm.h>

The typedef in in_systm.h are still there.
2009-02-13 15:14:43 +00:00
Ed Maste
d2035ffb7a Move CTASSERT from header file to source file, per implementation note now
in the CTASSERT man page.

Submitted by:	Ryan Stone
2008-09-26 18:30:11 +00:00
Rui Paulo
bf37f5b05f Remove IPTOS_CE and IPTOS_ECT constants. They were defined in RFC 2481
but later obsoleted by RFC 3168.
Discussed on freebsd-net with no objections.

Approved by: njl (mentor), rwatson
2007-10-19 12:46:15 +00:00
Robert Watson
c59b9aa51b White space and style cleanup. 2007-05-11 11:00:48 +00:00
Warner Losh
0befead1e0 Marking this as __packed was needed to get the alignment and offset of
members right.  However, it also said it was aligned(1), which meant
that gcc generated really bad code.  Mark this as aligned(4).  This
makes things a little faster on arm (a couple percent), but also saves
about 30k on the size of the kernel for arm.

I talked about doing this with bde, but didn't check with him before
the commit, so I'm hesitant say 'reviewed by: bde'.
2007-01-12 07:23:31 +00:00
Warner Losh
c398230b64 /* -> /*- for license, minor formatting changes 2005-01-07 01:45:51 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Bruce M Simpson
91179f796d Spell types consistently throughout this file. Do not use the __packed attribute, as we are often #include'd from userland without <sys/cdefs.h> in front of us, and it is not strictly necessary.
Noticed by:	Sascha Blank
2004-02-16 14:40:56 +00:00
Bruce M Simpson
1cfd4b5326 Initial import of RFC 2385 (TCP-MD5) digest support.
This is the first of two commits; bringing in the kernel support first.
This can be enabled by compiling a kernel with options TCP_SIGNATURE
and FAST_IPSEC.

For the uninitiated, this is a TCP option which provides for a means of
authenticating TCP sessions which came into being before IPSEC. It is
still relevant today, however, as it is used by many commercial router
vendors, particularly with BGP, and as such has become a requirement for
interconnect at many major Internet points of presence.

Several parts of the TCP and IP headers, including the segment payload,
are digested with MD5, including a shared secret. The PF_KEY interface
is used to manage the secrets using security associations in the SADB.

There is a limitation here in that as there is no way to map a TCP flow
per-port back to an SPI without polluting tcpcb or using the SPD; the
code to do the latter is unstable at this time. Therefore this code only
supports per-host keying granularity.

Whilst FAST_IPSEC is mutually exclusive with KAME IPSEC (and thus IPv6),
TCP_SIGNATURE applies only to IPv4. For the vast majority of prospective
users of this feature, this will not pose any problem.

This implementation is output-only; that is, the option is honoured when
responding to a host initiating a TCP session, but no effort is made
[yet] to authenticate inbound traffic. This is, however, sufficient to
interwork with Cisco equipment.

Tested with a Cisco 2501 running IOS 12.0(27), and Quagga 0.96.4 with
local patches. Patches for tcpdump to validate TCP-MD5 sessions are also
available from me upon request.

Sponsored by:	sentex.net
2004-02-11 04:26:04 +00:00
Hajimu UMEMOTO
59dfcba4aa add ECN support in layer-3.
- implement the tunnel egress rule in ip_ecn_egress() in ip_ecn.c.
   make ip{,6}_ecn_egress() return integer to tell the caller that
   this packet should be dropped.
 - handle ECN at fragment reassembly in ip_input.c and frag6.c.

Obtained from:	KAME
2003-10-29 15:07:04 +00:00
Matthew N. Dodd
2c56e246fa Back out support for RFC3514.
RFC3514 poses an unacceptale risk to compliant systems.
2003-04-02 20:14:44 +00:00
Matthew N. Dodd
8faf6df9b3 Sync constant define with NetBSD.
Requested by:	 Tom Spindler <dogcow@babymeat.com>
2003-04-02 10:28:47 +00:00
Matthew N. Dodd
09139a4537 Implement support for RFC 3514 (The Security Flag in the IPv4 Header).
(See: ftp://ftp.rfc-editor.org/in-notes/rfc3514.txt)

This fulfills the host requirements for userland support by
way of the setsockopt() IP_EVIL_INTENT message.

There are three sysctl tunables provided to govern system behavior.

	net.inet.ip.rfc3514:

		Enables support for rfc3514.  As this is an
		Informational RFC and support is not yet widespread
		this option is disabled by default.

	net.inet.ip.hear_no_evil

		 If set the host will discard all received evil packets.

	net.inet.ip.speak_no_evil

		If set the host will discard all transmitted evil packets.

The IP statistics counter 'ips_evil' (available via 'netstat') provides
information on the number of 'evil' packets recieved.

For reference, the '-E' option to 'ping' has been provided to demonstrate
and test the implementation.
2003-04-01 08:21:44 +00:00
Maxime Henrion
aecfcdb824 Use __packed instead of __attribute__((__packed__)). 2003-03-22 00:25:14 +00:00
Poul-Henning Kamp
53be11f680 Fix two instances of variant struct definitions in sys/netinet:
Remove the never completed _IP_VHL version, it has not caught on
anywhere and it would make us incompatible with other BSD netstacks
to retain this version.

Add a CTASSERT protecting sizeof(struct ip) == 20.

Don't let the size of struct ipq depend on the IPDIVERT option.

This is a functional no-op commit.

Approved by:	re
2002-10-20 22:52:07 +00:00
Robert Watson
365979cdac o Add IPOPT_ESO for the 'Extended Security' IP option (RFC1108)
Obtained from:	TrustedBSD Project
2001-12-14 19:37:32 +00:00
Robert Watson
18e2b6a995 o Add definition for IPOPT_CIPSO, the commercial security IP option
number.

Submitted by:	Ilmar S. Habibulin <ilmar@watson.org>
Obtained from:	TrustedBSD Project
2001-12-14 19:34:42 +00:00
Yoshinobu Inoue
6a800098cc IPSEC support in the kernel.
pr_input() routines prototype is also changed to support IPSEC and IPV6
chained protocol headers.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
1999-12-22 19:13:38 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Bruce Evans
57d05a62d1 Fixed pedantic semantics errors (bitfields not of type int, signed int
or unsigned int).
1998-06-07 12:00:13 +00:00
Dima Ruban
c383a33f06 NetBSD PR# 2772
Reviewed by:	David Greenman
1998-02-26 08:31:53 +00:00
Bruce Evans
d342b533eb Removed a stale comment. (We don't declare ip_len and ip_offset as
short.  I guess we depend on bogus ANSI value-preserving extension
of u_short to int to avoid unsigned comparison bugs.)
1997-12-19 23:33:08 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Garrett Wollman
64682bc28a Give ip_len and ip_off more natural, unsigned types. 1996-10-23 18:35:50 +00:00
Garrett Wollman
61e5033f0a Define a few macros useful in the _IP_VHL case. 1996-04-18 15:42:50 +00:00
Bill Fenner
49fa849bc8 IGMPv2 routines rewritten, to be more compact and to fully comply
with the IGMPv2 Internet Draft (including Router Alert IP option)
1996-03-14 16:59:20 +00:00
Garrett Wollman
1814a725c2 If _IP_VHL is defined, declare a single ip_vhl member in struct ip rather
than separate ip_v and ip_hl members.  Should have no effect on current code,
but I'd eventually like to get rid of those obnoxious bitfields completely.
1995-12-21 21:20:27 +00:00
Garrett Wollman
3271ad14d8 Merge 4.4-Lite-2 by updating the version number.
Obtained from:	4.4BSD-Lite-2
1995-09-21 18:04:43 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Andrey A. Chernov
2ee32961f5 Add IPTOS_MINCOST according to RFC 1349
Change IPTOS_PREC_ROUTINE to 0 (was conflict with IPTOS_LOWDELAY) according
to RFC 791 (unchanged since it) and BSDI 2.0 style
Submitted by: Igor Sviridov <siac@ua.net>
1995-05-05 14:36:38 +00:00
Paul Richards
707f139edb Made idempotent.
Submitted by:	Paul
1994-08-21 05:27:42 +00:00
David Greenman
3c4dd3568f Added $Id$ 1994-08-02 07:55:43 +00:00
Rodney W. Grimes
df8bae1de4 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00