2019-05-19 06:07:45 -06:00
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# SPDX-License-Identifier: GPL-2.0-only
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2005-04-16 16:20:36 -06:00
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#
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# SCTP configuration
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#
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2007-05-23 15:48:57 -06:00
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menuconfig IP_SCTP
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2013-02-12 17:24:56 -07:00
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tristate "The SCTP Protocol"
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depends on INET
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2005-04-16 16:20:36 -06:00
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depends on IPV6 || IPV6=n
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2007-11-29 07:53:52 -07:00
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select CRYPTO
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select CRYPTO_HMAC
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select CRYPTO_SHA1
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2007-12-16 15:06:41 -07:00
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select LIBCRC32C
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2005-04-16 16:20:36 -06:00
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---help---
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Stream Control Transmission Protocol
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From RFC 2960 <http://www.ietf.org/rfc/rfc2960.txt>.
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"SCTP is a reliable transport protocol operating on top of a
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connectionless packet network such as IP. It offers the following
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services to its users:
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-- acknowledged error-free non-duplicated transfer of user data,
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-- data fragmentation to conform to discovered path MTU size,
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-- sequenced delivery of user messages within multiple streams,
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with an option for order-of-arrival delivery of individual user
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messages,
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-- optional bundling of multiple user messages into a single SCTP
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packet, and
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-- network-level fault tolerance through supporting of multi-
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homing at either or both ends of an association."
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To compile this protocol support as a module, choose M here: the
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net: sctp: rework debugging framework to use pr_debug and friends
We should get rid of all own SCTP debug printk macros and use the ones
that the kernel offers anyway instead. This makes the code more readable
and conform to the kernel code, and offers all the features of dynamic
debbuging that pr_debug() et al has, such as only turning on/off portions
of debug messages at runtime through debugfs. The runtime cost of having
CONFIG_DYNAMIC_DEBUG enabled, but none of the debug statements printing,
is negligible [1]. If kernel debugging is completly turned off, then these
statements will also compile into "empty" functions.
While we're at it, we also need to change the Kconfig option as it /now/
only refers to the ifdef'ed code portions in outqueue.c that enable further
debugging/tracing of SCTP transaction fields. Also, since SCTP_ASSERT code
was enabled with this Kconfig option and has now been removed, we
transform those code parts into WARNs resp. where appropriate BUG_ONs so
that those bugs can be more easily detected as probably not many people
have SCTP debugging permanently turned on.
To turn on all SCTP debugging, the following steps are needed:
# mount -t debugfs none /sys/kernel/debug
# echo -n 'module sctp +p' > /sys/kernel/debug/dynamic_debug/control
This can be done more fine-grained on a per file, per line basis and others
as described in [2].
[1] https://www.kernel.org/doc/ols/2009/ols2009-pages-39-46.pdf
[2] Documentation/dynamic-debug-howto.txt
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-28 11:49:40 -06:00
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module will be called sctp. Debug messages are handeled by the
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kernel's dynamic debugging framework.
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2005-04-16 16:20:36 -06:00
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If in doubt, say N.
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2007-05-23 15:48:57 -06:00
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if IP_SCTP
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2005-04-16 16:20:36 -06:00
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config SCTP_DBG_OBJCNT
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bool "SCTP: Debug object counts"
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2008-07-19 00:03:44 -06:00
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depends on PROC_FS
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2005-04-16 16:20:36 -06:00
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help
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2018-07-24 13:29:08 -06:00
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If you say Y, this will enable debugging support for counting the
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type of objects that are currently allocated. This is useful for
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2008-07-19 00:03:44 -06:00
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identifying memory leaks. This debug information can be viewed by
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'cat /proc/net/sctp/sctp_dbg_objcnt'
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If unsure, say N
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2012-12-14 08:22:01 -07:00
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choice
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prompt "Default SCTP cookie HMAC encoding"
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2013-01-07 09:47:46 -07:00
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default SCTP_DEFAULT_COOKIE_HMAC_MD5
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2012-12-14 08:22:01 -07:00
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help
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This option sets the default sctp cookie hmac algorithm
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when in doubt select 'md5'
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config SCTP_DEFAULT_COOKIE_HMAC_MD5
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bool "Enable optional MD5 hmac cookie generation"
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help
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Enable optional MD5 hmac based SCTP cookie generation
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select SCTP_COOKIE_HMAC_MD5
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config SCTP_DEFAULT_COOKIE_HMAC_SHA1
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bool "Enable optional SHA1 hmac cookie generation"
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help
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Enable optional SHA1 hmac based SCTP cookie generation
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select SCTP_COOKIE_HMAC_SHA1
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config SCTP_DEFAULT_COOKIE_HMAC_NONE
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bool "Use no hmac alg in SCTP cookie generation"
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help
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Use no hmac algorithm in SCTP cookie generation
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endchoice
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2005-04-16 16:20:36 -06:00
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2012-10-24 03:20:03 -06:00
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config SCTP_COOKIE_HMAC_MD5
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bool "Enable optional MD5 hmac cookie generation"
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2005-04-16 16:20:36 -06:00
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help
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2012-10-24 03:20:03 -06:00
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Enable optional MD5 hmac based SCTP cookie generation
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select CRYPTO_HMAC if SCTP_COOKIE_HMAC_MD5
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select CRYPTO_MD5 if SCTP_COOKIE_HMAC_MD5
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config SCTP_COOKIE_HMAC_SHA1
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bool "Enable optional SHA1 hmac cookie generation"
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2005-04-16 16:20:36 -06:00
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help
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2012-10-24 03:20:03 -06:00
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Enable optional SHA1 hmac based SCTP cookie generation
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select CRYPTO_HMAC if SCTP_COOKIE_HMAC_SHA1
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select CRYPTO_SHA1 if SCTP_COOKIE_HMAC_SHA1
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2005-04-16 16:20:36 -06:00
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2016-04-14 01:35:33 -06:00
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config INET_SCTP_DIAG
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depends on INET_DIAG
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def_tristate INET_DIAG
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2007-05-23 15:48:57 -06:00
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endif # IP_SCTP
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