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965ae44412
This patch is to add the functions to create/release udp4 sock, and set the sock's encap_rcv to process the incoming udp encap sctp packets. In sctp_udp_rcv(), as we can see, all we need to do is fix the transport header for sctp_rcv(), then it would implement the part of rfc6951#section-5.4: "When an encapsulated packet is received, the UDP header is removed. Then, the generic lookup is performed, as done by an SCTP stack whenever a packet is received, to find the association for the received SCTP packet" Note that these functions will be called in the last patch of this patchset when enabling this feature. v1->v2: - Add pr_err() when fails to create udp v4 sock. v2->v3: - Add 'select NET_UDP_TUNNEL' in sctp Kconfig. v3->v4: - No change. v4->v5: - Change to set udp_port to 0 by default. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
98 lines
2.8 KiB
Plaintext
98 lines
2.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# SCTP configuration
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#
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menuconfig IP_SCTP
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tristate "The SCTP Protocol"
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depends on INET
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depends on IPV6 || IPV6=n
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select CRYPTO
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select CRYPTO_HMAC
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select CRYPTO_SHA1
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select LIBCRC32C
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select NET_UDP_TUNNEL
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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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module will be called sctp. Debug messages are handled by the
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kernel's dynamic debugging framework.
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If in doubt, say N.
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if IP_SCTP
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config SCTP_DBG_OBJCNT
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bool "SCTP: Debug object counts"
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depends on PROC_FS
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help
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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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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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choice
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prompt "Default SCTP cookie HMAC encoding"
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default SCTP_DEFAULT_COOKIE_HMAC_MD5
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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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config SCTP_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 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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help
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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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config INET_SCTP_DIAG
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depends on INET_DIAG
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def_tristate INET_DIAG
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endif # IP_SCTP
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