'\" t
.TH IP\-XFRM 8 "20 Dec 2011" "iproute2" "Linux"
.SH "NAME"
ip-xfrm \- transform configuration
.SH "SYNOPSIS"
.sp
.ad l
.in +8
.ti -8
.B ip
.RI "[ " OPTIONS " ]"
.B xfrm
.RI " { " COMMAND " | "
.BR help " }"
.sp

.ti -8
.B "ip xfrm"
.IR XFRM-OBJECT " { " COMMAND " | "
.BR help " }"
.sp

.ti -8
.IR XFRM-OBJECT " :="
.BR state " | " policy " | " monitor
.sp

.ti -8
.BR "ip xfrm state" " { " add " | " update " } "
.IR ID " [ " ALGO-LIST " ]"
.RB "[ " mode
.IR MODE " ]"
.RB "[ " mark
.I MARK
.RB "[ " mask
.IR MASK " ] ]"
.RB "[ " reqid
.IR REQID " ]"
.RB "[ " seq
.IR SEQ " ]"
.RB "[ " replay-window
.IR SIZE " ]"
.RB "[ " replay-seq
.IR SEQ " ]"
.RB "[ " replay-oseq
.IR SEQ " ]"
.RB "[ " replay-seq-hi
.IR SEQ " ]"
.RB "[ " replay-oseq-hi
.IR SEQ " ]"
.RB "[ " flag
.IR FLAG-LIST " ]"
.RB "[ " sel
.IR SELECTOR " ] [ " LIMIT-LIST " ]"
.RB "[ " encap
.IR ENCAP " ]"
.RB "[ " coa
.IR ADDR "[/" PLEN "] ]"
.RB "[ " ctx
.IR CTX " ]"
.RB "[ " extra-flag
.IR EXTRA-FLAG-LIST " ]"
.RB "[ " output-mark
.IR OUTPUT-MARK
.RB "[ " mask
.IR MASK " ] ]"
.RB "[ " if_id
.IR IF-ID " ]"
.RB "[ " offload
.RB "[ " crypto | packet " ]"
.RB dev
.IR DEV "
.RB dir
.IR DIR " ]"
.RB "[ " tfcpad
.IR LENGTH " ]"

.ti -8
.B "ip xfrm state allocspi"
.I ID
.RB "[ " mode
.IR MODE " ]"
.RB "[ " mark
.I MARK
.RB "[ " mask
.IR MASK " ] ]"
.RB "[ " reqid
.IR REQID " ]"
.RB "[ " seq
.IR SEQ " ]"
.RB "[ " min
.I SPI
.B max
.IR SPI " ]"

.ti -8
.BR "ip xfrm state" " { " delete " | " get " } "
.I ID
.RB "[ " mark
.I MARK
.RB "[ " mask
.IR MASK " ] ]"

.ti -8
.BR ip " [ " -4 " | " -6 " ] " "xfrm state deleteall" " ["
.IR ID " ]"
.RB "[ " mode
.IR MODE " ]"
.RB "[ " reqid
.IR REQID " ]"
.RB "[ " flag
.IR FLAG-LIST " ]"

.ti -8
.BR ip " [ " -4 " | " -6 " ] " "xfrm state list" " ["
.IR ID " ]"
.RB "[ " nokeys " ]"
.RB "[ " mode
.IR MODE " ]"
.RB "[ " reqid
.IR REQID " ]"
.RB "[ " flag
.IR FLAG-LIST " ]"

.ti -8
.BR "ip xfrm state flush" " [ " proto
.IR XFRM-PROTO " ]"

.ti -8
.BR "ip xfrm state count"

.ti -8
.IR ID " :="
.RB "[ " src
.IR ADDR " ]"
.RB "[ " dst
.IR ADDR " ]"
.RB "[ " proto
.IR XFRM-PROTO " ]"
.RB "[ " spi
.IR SPI " ]"

.ti -8
.IR XFRM-PROTO " :="
.BR esp " | " ah " | " comp " | " route2 " | " hao

.ti -8
.IR ALGO-LIST " := [ " ALGO-LIST " ] " ALGO

.ti -8
.IR ALGO " :="
.RB "{ " enc " | " auth " } "
.IR ALGO-NAME " " ALGO-KEYMAT " |"
.br
.B auth-trunc
.IR ALGO-NAME " " ALGO-KEYMAT " " ALGO-TRUNC-LEN " |"
.br
.B aead
.IR ALGO-NAME " " ALGO-KEYMAT " " ALGO-ICV-LEN " |"
.br
.B comp
.IR ALGO-NAME

.ti -8
.IR MODE " := "
.BR transport " | " tunnel " | " beet " | " ro " | " in_trigger

.ti -8
.IR FLAG-LIST " := [ " FLAG-LIST " ] " FLAG

.ti -8
.IR FLAG " :="
.BR noecn " | " decap-dscp " | " nopmtudisc " | " wildrecv " | " icmp " | "
.BR af-unspec " | " align4 " | " esn

.ti -8
.IR SELECTOR " :="
.RB "[ " src
.IR ADDR "[/" PLEN "] ]"
.RB "[ " dst
.IR ADDR "[/" PLEN "] ]"
.RB "[ " dev
.IR DEV " ]"
.br
.RI "[ " UPSPEC " ]"

.ti -8
.IR UPSPEC " := "
.BR proto " {"
.IR PROTO " |"
.br
.RB "{ " tcp " | " udp " | " sctp " | " dccp " } [ " sport
.IR PORT " ]"
.RB "[ " dport
.IR PORT " ] |"
.br
.RB "{ " icmp " | " ipv6-icmp " | " mobility-header " } [ " type
.IR NUMBER " ]"
.RB "[ " code
.IR NUMBER " ] |"
.br
.BR gre " [ " key
.RI "{ " DOTTED-QUAD " | " NUMBER " } ] }"

.ti -8
.IR LIMIT-LIST " := [ " LIMIT-LIST " ]"
.B limit
.I LIMIT

.ti -8
.IR LIMIT " :="
.RB "{ " time-soft " | " time-hard " | " time-use-soft " | " time-use-hard " }"
.IR "SECONDS" " |"
.br
.RB "{ " byte-soft " | " byte-hard " }"
.IR SIZE " |"
.br
.RB "{ " packet-soft " | " packet-hard " }"
.I COUNT

.ti -8
.IR ENCAP " :="
.RB "{ " espinudp " | " espinudp-nonike " | " espintcp " }"
.IR SPORT " " DPORT " " OADDR

.ti -8
.IR EXTRA-FLAG-LIST " := [ " EXTRA-FLAG-LIST " ] " EXTRA-FLAG

.ti -8
.IR EXTRA-FLAG " := "
.BR dont-encap-dscp " | " oseq-may-wrap

.ti -8
.BR "ip xfrm policy" " { " add " | " update " }"
.I SELECTOR
.B dir
.I DIR
.RB "[ " ctx
.IR CTX " ]"
.RB "[ " mark
.I MARK
.RB "[ " mask
.IR MASK " ] ]"
.RB "[ " index
.IR INDEX " ]"
.RB "[ " ptype
.IR PTYPE " ]"
.RB "[ " action
.IR ACTION " ]"
.RB "[ " priority
.IR PRIORITY " ]"
.RB "[ " flag
.IR FLAG-LIST " ]"
.RB "[ " if_id
.IR IF-ID " ]"
.RB "[ " offload
.RB packet
.RB dev
.IR DEV " ]"
.RI "[ " LIMIT-LIST " ] [ " TMPL-LIST " ]"

.ti -8
.BR "ip xfrm policy" " { " delete " | " get " }"
.RI "{ " SELECTOR " | "
.B index
.IR INDEX " }"
.B dir
.I DIR
.RB "[ " ctx
.IR CTX " ]"
.RB "[ " mark
.I MARK
.RB "[ " mask
.IR MASK " ] ]"
.RB "[ " ptype
.IR PTYPE " ]"
.RB "[ " if_id
.IR IF-ID " ]"

.ti -8
.BR ip " [ " -4 " | " -6 " ] " "xfrm policy" " { " deleteall " | " list " }"
.RB "[ " nosock " ]"
.RI "[ " SELECTOR " ]"
.RB "[ " dir
.IR DIR " ]"
.RB "[ " index
.IR INDEX " ]"
.RB "[ " ptype
.IR PTYPE " ]"
.RB "[ " action
.IR ACTION " ]"
.RB "[ " priority
.IR PRIORITY " ]"
.RB "[ " flag
.IR FLAG-LIST "]"

.ti -8
.B "ip xfrm policy flush"
.RB "[ " ptype
.IR PTYPE " ]"

.ti -8
.B "ip xfrm policy count"

.ti -8
.B "ip xfrm policy set"
.RB "[ " hthresh4
.IR LBITS " " RBITS " ]"
.RB "[ " hthresh6
.IR LBITS " " RBITS " ]"

.ti -8
.B "ip xfrm policy setdefault"
.IR DIR
.IR ACTION " [ "
.IR DIR
.IR ACTION " ] [ "
.IR DIR
.IR ACTION " ]"

.ti -8
.B "ip xfrm policy getdefault"

.ti -8
.IR SELECTOR " :="
.RB "[ " src
.IR ADDR "[/" PLEN "] ]"
.RB "[ " dst
.IR ADDR "[/" PLEN "] ]"
.RB "[ " dev
.IR DEV " ]"
.RI "[ " UPSPEC " ]"

.ti -8
.IR UPSPEC " := "
.BR proto " {"
.IR PROTO " |"
.br
.RB "{ " tcp " | " udp " | " sctp " | " dccp " } [ " sport
.IR PORT " ]"
.RB "[ " dport
.IR PORT " ] |"
.br
.RB "{ " icmp " | " ipv6-icmp " | " mobility-header " } [ " type
.IR NUMBER " ]"
.RB "[ " code
.IR NUMBER " ] |"
.br
.BR gre " [ " key
.RI "{ " DOTTED-QUAD " | " NUMBER " } ] }"

.ti -8
.IR DIR " := "
.BR in " | " out " | " fwd

.ti -8
.IR PTYPE " := "
.BR main " | " sub

.ti -8
.IR ACTION " := "
.BR allow " | " block

.ti -8
.IR FLAG-LIST " := [ " FLAG-LIST " ] " FLAG

.ti -8
.IR FLAG " :="
.BR localok " | " icmp

.ti -8
.IR LIMIT-LIST " := [ " LIMIT-LIST " ]"
.B limit
.I LIMIT

.ti -8
.IR LIMIT " :="
.RB "{ " time-soft " | " time-hard " | " time-use-soft " | " time-use-hard " }"
.IR "SECONDS" " |"
.br
.RB "{ " byte-soft " | " byte-hard " }"
.IR SIZE " |"
.br
.RB "{ " packet-soft " | " packet-hard " }"
.I COUNT

.ti -8
.IR TMPL-LIST " := [ " TMPL-LIST " ]"
.B tmpl
.I TMPL

.ti -8
.IR TMPL " := " ID
.RB "[ " mode
.IR MODE " ]"
.RB "[ " reqid
.IR REQID " ]"
.RB "[ " level
.IR LEVEL " ]"

.ti -8
.IR ID " :="
.RB "[ " src
.IR ADDR " ]"
.RB "[ " dst
.IR ADDR " ]"
.RB "[ " proto
.IR XFRM-PROTO " ]"
.RB "[ " spi
.IR SPI " ]"

.ti -8
.IR XFRM-PROTO " :="
.BR esp " | " ah " | " comp " | " route2 " | " hao

.ti -8
.IR MODE " := "
.BR transport " | " tunnel " | " beet " | " ro " | " in_trigger

.ti -8
.IR LEVEL " :="
.BR required " | " use

.ti -8
.BR "ip xfrm monitor" " ["
.BI all-nsid
] [
.BI nokeys
] [
.BI all
 |
.IR LISTofXFRM-OBJECTS " ]"

.ti -8
.IR LISTofXFRM-OBJECTS " := [ " LISTofXFRM-OBJECTS " ] " XFRM-OBJECT

.ti -8
.IR XFRM-OBJECT " := "
.BR acquire " | " expire " | " SA " | " policy " | " aevent " | " report

.in -8
.ad b

.SH DESCRIPTION

xfrm is an IP framework for transforming packets (such as encrypting
their payloads). This framework is used to implement the IPsec protocol
suite (with the
.B state
object operating on the Security Association Database, and the
.B policy
object operating on the Security Policy Database). It is also used for
the IP Payload Compression Protocol and features of Mobile IPv6.

.TS
l l.
ip xfrm state add	add new state into xfrm
ip xfrm state update	update existing state in xfrm
ip xfrm state allocspi	allocate an SPI value
ip xfrm state delete	delete existing state in xfrm
ip xfrm state get	get existing state in xfrm
ip xfrm state deleteall	delete all existing state in xfrm
ip xfrm state list	print out the list of existing state in xfrm
ip xfrm state flush	flush all state in xfrm
ip xfrm state count	count all existing state in xfrm
.TE

.TP
.IR ID
is specified by a source address, destination address,
.RI "transform protocol " XFRM-PROTO ","
and/or Security Parameter Index
.IR SPI "."
(For IP Payload Compression, the Compression Parameter Index or CPI is used for
.IR SPI ".)"

.TP
.I XFRM-PROTO
specifies a transform protocol:
.RB "IPsec Encapsulating Security Payload (" esp "),"
.RB "IPsec Authentication Header (" ah "),"
.RB "IP Payload Compression (" comp "),"
.RB "Mobile IPv6 Type 2 Routing Header (" route2 "), or"
.RB "Mobile IPv6 Home Address Option (" hao ")."

.TP
.I ALGO-LIST
contains one or more algorithms to use. Each algorithm
.I ALGO
is specified by:
.RS
.IP \[bu]
the algorithm type:
.RB "encryption (" enc "),"
.RB "authentication (" auth " or " auth-trunc "),"
.RB "authenticated encryption with associated data (" aead "), or"
.RB "compression (" comp ")"
.IP \[bu]
the algorithm name
.IR ALGO-NAME
(see below)
.IP \[bu]
.RB "(for all except " comp ")"
the keying material
.IR ALGO-KEYMAT ","
which may include both a key and a salt or nonce value; refer to the
corresponding RFC
.IP \[bu]
.RB "(for " auth-trunc " only)"
the truncation length
.I ALGO-TRUNC-LEN
in bits
.IP \[bu]
.RB "(for " aead " only)"
the Integrity Check Value length
.I ALGO-ICV-LEN
in bits
.RE

.nh
.RS
Encryption algorithms include
.BR ecb(cipher_null) ", " cbc(des) ", " cbc(des3_ede) ", " cbc(cast5) ","
.BR cbc(blowfish) ", " cbc(aes) ", " cbc(serpent) ", " cbc(camellia) ","
.BR cbc(twofish) ", and " rfc3686(ctr(aes)) "."

Authentication algorithms include
.BR digest_null ", " hmac(md5) ", " hmac(sha1) ", " hmac(sha256) ","
.BR hmac(sha384) ", " hmac(sha512) ", " hmac(rmd160) ", and " xcbc(aes) "."

Authenticated encryption with associated data (AEAD) algorithms include
.BR rfc4106(gcm(aes)) ", " rfc4309(ccm(aes)) ", and " rfc4543(gcm(aes)) "."

Compression algorithms include
.BR deflate ", " lzs ", and " lzjh "."
.RE
.hy

.TP
.I MODE
specifies a mode of operation for the transform protocol. IPsec and IP Payload
Compression modes are
.BR transport ", " tunnel ","
and (for IPsec ESP only) Bound End-to-End Tunnel
.RB "(" beet ")."
Mobile IPv6 modes are route optimization
.RB "(" ro ")"
and inbound trigger
.RB "(" in_trigger ")."

.TP
.I FLAG-LIST
contains one or more of the following optional flags:
.BR noecn ", " decap-dscp ", " nopmtudisc ", " wildrecv ", " icmp ", "
.BR af-unspec ", " align4 ", or " esn "."

.TP
.IR SELECTOR
selects the traffic that will be controlled by the policy, based on the source
address, the destination address, the network device, and/or
.IR UPSPEC "."

.TP
.IR UPSPEC
selects traffic by protocol. For the
.BR tcp ", " udp ", " sctp ", or " dccp
protocols, the source and destination port can optionally be specified.
For the
.BR icmp ", " ipv6-icmp ", or " mobility-header
protocols, the type and code numbers can optionally be specified.
For the
.B gre
protocol, the key can optionally be specified as a dotted-quad or number.
Other protocols can be selected by name or number
.IR PROTO "."

.TP
.I LIMIT-LIST
sets limits in seconds, bytes, or numbers of packets.

.TP
.I ENCAP
encapsulates packets with protocol
.BR espinudp ", " espinudp-nonike ", or " espintcp ","
.RI "using source port " SPORT ", destination port "  DPORT
.RI ", and original address " OADDR "."

.TP
.I MARK
used to match xfrm policies and states

.TP
.I OUTPUT-MARK
used to set the output mark to influence the routing
of the packets emitted by the state

.TP
.I IF-ID
xfrm interface identifier used to in both xfrm policies and states

.TP
.I DEV
Network interface name used to offload policies and states

.sp
.PP
.TS
l l.
ip xfrm policy add	add a new policy
ip xfrm policy update	update an existing policy
ip xfrm policy delete	delete an existing policy
ip xfrm policy get	get an existing policy
ip xfrm policy deleteall	delete all existing xfrm policies
ip xfrm policy list	print out the list of xfrm policies
ip xfrm policy flush	flush policies
.TE

.TP
.BR nosock
filter (remove) all socket policies from the output.

.TP
.IR SELECTOR
selects the traffic that will be controlled by the policy, based on the source
address, the destination address, the network device, and/or
.IR UPSPEC "."

.TP
.IR UPSPEC
selects traffic by protocol. For the
.BR tcp ", " udp ", " sctp ", or " dccp
protocols, the source and destination port can optionally be specified.
For the
.BR icmp ", " ipv6-icmp ", or " mobility-header
protocols, the type and code numbers can optionally be specified.
For the
.B gre
protocol, the key can optionally be specified as a dotted-quad or number.
Other protocols can be selected by name or number
.IR PROTO "."

.TP
.I DIR
selects the policy direction as
.BR in ", " out ", or " fwd "."

.TP
.I CTX
sets the security context.

.TP
.I PTYPE
can be
.BR main " (default) or " sub "."

.TP
.I ACTION
can be
.BR allow " (default) or " block "."

.TP
.I PRIORITY
is a number that defaults to zero.

.TP
.I FLAG-LIST
contains one or both of the following optional flags:
.BR local " or " icmp "."

.TP
.I LIMIT-LIST
sets limits in seconds, bytes, or numbers of packets.

.TP
.I TMPL-LIST
is a template list specified using
.IR ID ", " MODE ", " REQID ", and/or " LEVEL ". "

.TP
.IR ID
is specified by a source address, destination address,
.RI "transform protocol " XFRM-PROTO ","
and/or Security Parameter Index
.IR SPI "."
(For IP Payload Compression, the Compression Parameter Index or CPI is used for
.IR SPI ".)"

.TP
.I XFRM-PROTO
specifies a transform protocol:
.RB "IPsec Encapsulating Security Payload (" esp "),"
.RB "IPsec Authentication Header (" ah "),"
.RB "IP Payload Compression (" comp "),"
.RB "Mobile IPv6 Type 2 Routing Header (" route2 "), or"
.RB "Mobile IPv6 Home Address Option (" hao ")."

.TP
.I MODE
specifies a mode of operation for the transform protocol. IPsec and IP Payload
Compression modes are
.BR transport ", " tunnel ","
and (for IPsec ESP only) Bound End-to-End Tunnel
.RB "(" beet ")."
Mobile IPv6 modes are route optimization
.RB "(" ro ")"
and inbound trigger
.RB "(" in_trigger ")."

.TP
.I LEVEL
can be
.BR required " (default) or " use "."

.sp
.PP
.TS
l l.
ip xfrm policy count	count existing policies
.TE

.PP
Use one or more -s options to display more details, including policy hash table
information.

.sp
.PP
.TS
l l.
ip xfrm policy set	configure the policy hash table
.TE

.PP
Security policies whose address prefix lengths are greater than or equal
policy hash table thresholds are hashed. Others are stored in the
policy_inexact chained list.

.TP
.I LBITS
specifies the minimum local address prefix length of policies that are
stored in the Security Policy Database hash table.

.TP
.I RBITS
specifies the minimum remote address prefix length of policies that are
stored in the Security Policy Database hash table.

.sp
.PP
.TS
l l.
ip xfrm monitor 	state monitoring for xfrm objects
.TE

.PP
The xfrm objects to monitor can be optionally specified.

.P
If the
.BI all-nsid
option is set, the program listens to all network namespaces that have a
nsid assigned into the network namespace were the program is running.
A prefix is displayed to show the network namespace where the message
originates. Example:
.sp
.in +2
[nsid 1]Flushed state proto 0
.in -2
.sp

.SH AUTHOR
Manpage revised by David Ward <david.ward@ll.mit.edu>
.br
Manpage revised by Christophe Gouault <christophe.gouault@6wind.com>
.br
Manpage revised by Nicolas Dichtel <nicolas.dichtel@6wind.com>