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12 13 14 15 16 17 RFC 5444
Mobile Ad hoc Networking (MANET) T. Clausen
Internet-Draft LIX, Ecole Polytechnique, France
Intended status: Standards Track C. Dearlove
Expires: May 17, 2008 BAE Systems Advanced Technology
Centre
J. Dean
Naval Research Laboratory
C. Adjih
INRIA Rocquencourt
November 14, 2007
Generalized MANET Packet/Message Format
draft-ietf-manet-packetbb-11
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Copyright Notice
Copyright (C) The IETF Trust (2007).
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Abstract
This document specifies a multi-message packet format that may be
used by mobile ad hoc network routing and other protocols.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Applicability Statement . . . . . . . . . . . . . . . . . . . 6
4. Protocol Overview and Functioning . . . . . . . . . . . . . . 7
5. Signaling Framework . . . . . . . . . . . . . . . . . . . . . 8
5.1. Packets . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2. Messages . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3. Packet and Message Versioning . . . . . . . . . . . . . . 12
5.4. Address Blocks . . . . . . . . . . . . . . . . . . . . . . 12
5.5. TLVs and TLV Blocks . . . . . . . . . . . . . . . . . . . 15
5.5.1. TLVs . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5.2. TLV Inclusion and Constraints . . . . . . . . . . . . 18
5.6. Malformed Elements . . . . . . . . . . . . . . . . . . . . 19
5.7. Padding . . . . . . . . . . . . . . . . . . . . . . . . . 20
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21
6.1. Message Types . . . . . . . . . . . . . . . . . . . . . . 21
6.2. Packet TLV Types . . . . . . . . . . . . . . . . . . . . . 21
6.3. Message TLV Types . . . . . . . . . . . . . . . . . . . . 22
6.4. Address Block TLV Types . . . . . . . . . . . . . . . . . 22
7. Security Considerations . . . . . . . . . . . . . . . . . . . 24
7.1. Security Suggestions . . . . . . . . . . . . . . . . . . . 24
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.1. Normative References . . . . . . . . . . . . . . . . . . . 25
8.2. Informative References . . . . . . . . . . . . . . . . . . 25
Appendix A. Examples . . . . . . . . . . . . . . . . . . . . . . 26
A.1. Address Block Examples . . . . . . . . . . . . . . . . . . 26
A.2. TLV Examples . . . . . . . . . . . . . . . . . . . . . . . 28
Appendix B. Illustrations . . . . . . . . . . . . . . . . . . . 31
Appendix B.1. Packet . . . . . . . . . . . . . . . . . . . . . . . 31
Appendix B.2. Message and Padding . . . . . . . . . . . . . . . . 36
Appendix B.3. Message Body . . . . . . . . . . . . . . . . . . . . 42
Appendix B.4. Address Block . . . . . . . . . . . . . . . . . . . 43
Appendix B.5. TLV Block . . . . . . . . . . . . . . . . . . . . . 50
Appendix B.6. TLV . . . . . . . . . . . . . . . . . . . . . . . . 50
Appendix C. Complete Example . . . . . . . . . . . . . . . . . . 56
Appendix D. Contributors . . . . . . . . . . . . . . . . . . . . 58
Appendix E. Acknowledgements . . . . . . . . . . . . . . . . . . 59
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 60
Intellectual Property and Copyright Statements . . . . . . . . . . 61
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1. Introduction
This document specifies the syntax of a general purpose multi-message
packet format for information exchange between MANET routers.
Messages consist of a message header, which is designed for control
of message dissemination, and a message body, which contains protocol
information. Only the syntax of the packet and messages is
specified. All syntactical entities, including packets and messages,
are specified using regular expressions.
This document specifies:
o A packet format, allowing zero or more messages to be contained
within a single transmission, and optionally including a packet
header. A packet with zero messages may be sent in case the only
information to exchange is contained in the packet header.
o A message format, where a message is composed of a message header
and a message body.
o A message header format, which contains information which may be
sufficient to allow a protocol using this specification to make
processing and forwarding decisions.
o A message body format, containing attributes associated with the
message or the originator of the message, as well as blocks of
addresses with associated attributes.
o An address block format, where an address block represents sets of
network addresses in a compact (compressed) form.
o A generalized type-length-value (TLV) format representing
attributes. Multiple TLVs can be included and each associated
with a packet, a message, an address, or a set of addresses.
The specification has been explicitly designed with the following
properties, listed in no particular order, in mind:
Parsing logic - the regular expression specification facilitates
generic, protocol independent, parsing logic.
Extensibility - packets and messages defined by a protocol using
this specification are extensible through defining new message
types and new TLVs. Existing protocol specifications using this
specification will be able to correctly identify and skip such new
message types and TLVs, while correctly parsing the remainder of
the packet and message.
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Efficiency - when reported addresses share common bit sequences
(e.g. prefixes or IPv6 interface identifiers) the address block
representation allows for a compact representation. Compact
message headers are ensured through permitting inclusion of only
required message header elements, unless indicated otherwise. The
structure of packet and message encoding allows parsing,
verifying, and identifying individual elements in a single pass.
Separation of forwarding and processing - a protocol using this
specification can be designed such that duplicate detection and
controlled scope message forwarding decisions can be made using
information contained in the message header, without processing
the message body.
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2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119. [1].
Additionally, this document uses the following terminology:
Packet - the top level entity in this specification. Packets are
transmitted over a single logical hop and are not forwarded. A
packet contains zero or more messages, and may contain a packet
header.
Message - the fundamental entity carrying protocol information, in
the form of addresses and TLVs. Messages are designed to be able
to be forwarded over one or more logical hops.
Address - a number of octets of the same length as the source IP
address in the IP datagram carrying the packet. The meaning of an
address is defined by the protocol using this specification.
Network Address - An address plus a prefix length between zero and
the length of an address in bits, inclusive.
TLV - a Type-Length-Value structure. This is a generic way in which
an attribute can be represented and correctly parsed, without the
parser having to understand the attribute.
Element - a syntactic entity defined in the regular expression
specification, represented using the notation <foo>.
<foo> - if <foo> is an 8 or 16 bit field then <foo> is also used to
represent the value of that field.
? - zero or one occurrences of the preceding element.
* - zero or more occurrences of the preceding element.
bar - a variable, usually obtained through calculations based on the
value(s) of field(s). Variables are introduced into the
specification solely as a means to clarify the description.
address-length - a variable whose value is the length of an address
in octets, it is 4 if using IPv4, 16 if using IPv6.
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3. Applicability Statement
This specification describes a generic multi-message packet format,
for carrying MANET routing protocol signals. The specification has
been developed from that used by OLSR (The Optimized Link State
Routing Protocol) [4].
The specification is designed with IP (IPv4/IPv6) in mind. All
addresses within a control message are assumed to be of the same
size, deduced from IP. In the case of mixed IPv6 and IPv4 addresses,
IPv4 addresses are represented as IPv4-mapped IPv6 addresses as
specified in [2].
The messages defined by this specification are designed to carry
routing protocol signals between MANET routers, and to support scope
limited diffusion, as well as point to point signaling in a multi-hop
network.
The packets defined by this specification are designed to carry a
number of messages in a single transmission. The packets may be
unicast or multicast, may be transmitted as appropriate to the
protocol using this specification and may travel over a single
logical hop which might consist of one or more IP hops.
This specification is particularly appropriate for extensible
protocols. It offers external extensibility in the form of new
message types. It offers internal extensibility in the form of TLVs,
which may be added to existing message types.
A protocol using the multi-message packet format defined by this
specification may constrain the syntax (for example requiring a
specific set of message header fields) and features (for example
specifying the suggested diffusion mechanism) that the protocol will
employ.
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4. Protocol Overview and Functioning
This specification does not describe a protocol. It describes a
packet format, which may be used by any mobile ad hoc network routing
or other protocol.
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5. Signaling Framework
This section provides syntactical specification of a packet,
represented by the element <packet> and the elements from which it is
composed. The specification is given in the form of regular
expressions. Illustrations of specified elements are given in
Appendix B.
5.1. Packets
<packet> is defined by:
<packet> = {<pkt-header><pad-octet>*}?
{<message><pad-octet>*}*
where <message> is defined in Section 5.2, and <pad-octet> is defined
in Section 5.7. Successful parsing is terminated when all octets
(defined using the variable pkt-size below) are used. A packet MUST
contain either a <pkt-header> or at least one <message>.
<pkt-header> is defined by:
<pkt-header> = <zero>
<pkt-semantics>
<pkt-version>?
<pkt-size>?
<pkt-seq-num>?
<tlv-block>?
where:
<zero> is an 8 bit field with all bits cleared ('0'). This field
serves to identify that the packet starts with a <pkt-header>.
<pkt-semantics> is an 8 bit field, specifying the composition of the
<pkt-header>:
bit 0 (phasversion): If cleared ('0'), then <pkt-version> is not
included in the <pkt-header>. If set ('1'), then <pkt-version>
is included in the <pkt-header>.
bit 1 (phassize): if cleared ('0'), then <pkt-size> is not
included in the <pkt-header>. if set ('1'), then <pkt-size> is
included in the <pkt-header>.
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bit 2 (pnoseqnum): if cleared ('0'), then <pkt-seq-num> is
included in the <pkt-header>. If set ('1'), then <pkt-seq-num>
is not included in the <pkt-header>.
bit 3 (phastlv): if cleared ('0'), then <tlv-block> is not
included in the <pkt-header>. If set ('1'), then <tlv-block>
is included in the <pkt-header>.
bit 4 (pnouniord): if cleared ('0'), then the packet TLV block
MUST conform to the constraints in Section 5.5.2. If set
('1'), then the packet TLV block is not subject to the
constraints in Section 5.5.2. Additional constraints MAY be
imposed by a protocol using this specification.
bits 5-7: are RESERVED, and MUST each be cleared ('0') to be in
conformance with this version of the specification.
<pkt-version> is omitted if the phasversion bit is cleared ('0'),
otherwise is an 8 bit field, specifying the version of this
specification.
<pkt-size> is omitted if the phassize bit is cleared ('0'),
otherwise is a 16 bit field, specifying the size of the <packet>
counted in octets.
<pkt-seq-num> is omitted if the pnoseqnum bit is set ('1'),
otherwise is a 16 bit field, specifying a packet sequence number.
<tlv-block> is omitted if the phastlv bit is cleared ('0'), and is
otherwise as defined in Section 5.5.
Note that since the message type zero is not used (see Section 6),
the presence or absence of a packet header can be determined by
inspecting the first octet of the packet.
pkt-version is a variable, defined to equal <pkt-version> if
present, or 0 otherwise. See Section 5.3.
pkt-size is a variable, defined to equal <pkt-size> if present, or
the size of the payload of the network or transport protocol
employed otherwise. (If not present, and the payload size is
unknown, then the packet cannot be parsed, and is considered
malformed.)
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5.2. Messages
Information is carried through messages. Messages contain:
o A message header.
o A message TLV block that contains zero or more TLVs, associated
with the whole message.
o Zero or more address blocks, each containing one or more
addresses.
o An address TLV block, containing zero or more TLVs, following each
address block.
<message> is defined by:
<message> = <msg-header>
<tlv-block>
{<addr-block><tlv-block>}*
<msg-header> = <msg-type>
<msg-semantics>
<msg-version>?
<msg-size>
<msg-orig-addr>?
<msg-hop-limit>?
<msg-hop-count>?
<msg-seq-num>?
where:
<tlv-block> is as defined in Section 5.5.
<addr-block> is as defined in Section 5.4.
<msg-type> is an 8 bit field, specifying the type of message. A
type with all bits cleared ('0') MUST NOT be used.
<msg-semantics> is an 8 bit field, specifying the interpretation of
the remainder of the message header:
bit 0 (mhasversion): If cleared ('0'), then <msg-version> is not
included in the <msg-header>. If set ('1'), then <msg-version>
is included in the <msg-header>.
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bit 1 (mnoorig): If cleared ('0'), then <msg-orig-addr> is
included in the <msg-header>. If set ('1'), then <msg-orig-
addr> is not included in the <msg-header>.
bit 2 (mnohoplimit): If cleared ('0'), then <msg-hop-limit> is
included in the <msg-header>. If set ('1'), then <msg-hop-
limit> is not included in the <msg-header>.
bit 3 (mnohopcount): If cleared ('0'), then <msg-hop-count> is
included in the <msg-header>. If set ('1'), then <msg-hop-
count> is not included in the <msg-header>
bit 4 (mnoseqnum): If cleared ('0'), then <msg-seq-num> is
included in the <msg-header>. If set ('1'), then <msg-seq-num>
is not included in the <msg-header>.
bit 5 (mistypedep): If cleared ('0'), then the message sequence
number in the message is type-independent. If set ('1'), then
the message sequence number contained in the message is type
dependent (the message originator maintains a sequence number
specific to <msg-type>). This bit MUST be cleared ('0') if the
mnoorig bit is set ('1').
bit 6 (mnouniord): if cleared ('0'), then the message TLV block
and all address TLV blocks in the message MUST conform to the
constraints in Section 5.5.2. If set ('1'), then the message
TLV block and all address TLV blocks in the message are not
subject to the constraints in Section 5.5.2. Additional
constraints MAY be imposed by a protocol using this
specification.
bit 7: is RESERVED and MUST be cleared ('0') to be in conformance
with this version of the specification.
If bit 1 (mnoorig) and bit 4 (mnoseqnum) are both cleared, then
the message header provides for duplicate suppression.
If bit 2 (mnohoplimit) is cleared, then the message header
provides for scope-delimited forwarding.
<msg-version> is omitted if the mhasversion bit is cleared ('0'),
otherwise is an 8 bit field, specifying the version of this
specification.
<msg-size> is a 16 bit field, specifying the size of the <message>,
counted in octets.
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<msg-orig-addr> is omitted if the mnoorig bit is set ('1'),
otherwise is an identifier of length equal to address-length,
which serves to uniquely identify the node that originated the
message.
<msg-hop-limit> is omitted if the mnohoplimit bit is set ('1'),
otherwise is an 8 bit field, which contains the maximum number of
logical hops that the message should be further transmitted.
(<msg-hop-limit> SHOULD be decremented if the message is
forwarded.)
<msg-hop-count> is omitted if the mnohopcount bit is set ('1'),
otherwise is an 8 bit field, which contains the number of logical
hops that the message has traveled. (<msg-hop-count> SHOULD be
incremented if the message is forwarded.)
<msg-seq-num> is omitted if the mnoseqnum bit is set ('1'),
otherwise is a 16 bit field, which contains a unique number,
generated by the message's originator node. The <msg-orig-addr>,
<msg-seq-num>, and, if the mistypedep bit in the <msg-semantics>
field is set, the <msg-type> of a message serves to uniquely
identify the message in the network (within the time period until
<msg-seq-num> wraps around to a matching value).
msg-version is a variable, defined to equal <msg-version> if
present, or to pkt-version otherwise. See Section 5.3.
5.3. Packet and Message Versioning
This specification defines packets and messages of version 0 (zero),
so that pkt-version and each msg-version MUST equal zero. This
SHOULD be indicated by clearing the phasversion and mhasversion bits
in <pkt-semantics> and <msg-semantics>, respectively.
A protocol using this specification, or any future version (i.e.
where pkt-version or msg-version are different from zero) of this
specification MUST specify appropriate behavior in the case where an
incoming packet or message indicates a pkt-version or msg-version
different from the one used by that protocol, e.g. by discarding the
packet or message.
5.4. Address Blocks
An address block may specify one or more addresses, or one or more
network addresses (address plus prefix length). An address is
specified as a sequence of address-length octets of the form head:
mid:tail. An address block is an ordered set of addresses sharing
the same head and tail, and having individual mids. An address block
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may specify network addresses either with a single prefix length for
all network addresses, or with a prefix length for each network
address.
<address-block> is defined by:
<address-block> = <num-addr>
<addr-semantics>
<head-length>?
<head>?
<tail-length>?
<tail>?
<mid>*
<prefix-length>*
where:
<num-addr> is an 8 bit field containing the number of addresses
represented in the address block, which MUST NOT be zero.
<addr-semantics> is an 8 bit field specifying the interpretation of
the remainder of the address block:
bit 0 (anohead): if cleared ('0'), then <head-length> is included
in the <address-block>, and <head> may be included in the
<address-block>. If set ('1'), then <head-length> and <head>
are not included in the <address-block>.
bit 1 (anotail) and bit 2 (ahaszerotail): MUST NOT both be set
('1'). Otherwise, they are interpreted according to Table 1.
+---------+--------------+---------------+-----------------+
| anotail | ahaszerotail | <tail-length> | <tail> |
+---------+--------------+---------------+-----------------+
| 0 | 0 | included | may be included |
| | | | |
| 1 | 0 | not included | not included |
| | | | |
| 0 | 1 | included | not included |
+---------+--------------+---------------+-----------------+
Table 1
bit 3 (ahassingleprelen) and bit 4 (ahasmultiprelen): MUST NOT
both be set ('1'). Otherwise, they are interpreted according
to Table 2.
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+------------+------------+--------------------+--------------------+
| ahassingle | ahasmulti | number of | nth network |
| prelen | prelen | <prefix-length> | address prefix |
| | | fields | length |
+------------+------------+--------------------+--------------------+
| 0 | 0 | zero | 8 * address-length |
| | | | |
| 1 | 0 | one | <prefix-length> |
| | | | |
| 0 | 1 | <num-addr> | nth |
| | | | <prefix-length> |
+------------+------------+--------------------+--------------------+
Table 2
bits 5-7: are RESERVED and MUST each be cleared ('0') to be in
accordance with this version of the specification.
<head-length> if present is an 8 bit field, which contains the total
length (in octets) of the head of all of the addresses.
head-length is a variable, defined to equal <head-length> if
present, or 0 otherwise.
<head> is omitted if head-length == 0, otherwise it is a field of
the head-length leftmost octets of all the addresses.
<tail-length> if present is an 8 bit field, which contains the total
length (in octets) of the tail of all of the addresses.
tail-length is a variable, defined to equal <tail-length> if
present, or 0 otherwise.
<tail> is omitted if tail-length == 0 or if the ahaszerotail bit is
set ('1'), otherwise it is a field of the tail-length rightmost
octets of all the addresses. If the ahaszerotail bit is set ('1')
then the tail-length rightmost octets of all the addresses are all
0.
mid-length is a variable, which MUST be non-negative, defined by:
* mid-length = address-length - head-length - tail-length
<mid> is omitted if mid-length == 0, otherwise each <mid> is a field
of length mid-length octets, representing the mid of the
corresponding address in the address block.
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<prefix-length> is an 8 bit field containing the length, in bits, of
the prefix length of a network address. If the ahassingleprelen
bit is set ('1') then a single <prefix-length> field contains the
prefix length of all addresses in the address block. If the
ahasmultiprelen bit is set ('1') then each of the <num-addr>
<prefix-length> fields contains the prefix length of the
corresponding address in the address block (in the same order).
Otherwise no <prefix-length> fields are present; each address may
be considered to have a prefix length equal to 8 * address-length
bits. The address block is malformed if any <prefix-length> field
has a value greater than 8 * address-length.
5.5. TLVs and TLV Blocks
A TLV block is defined by:
<tlv-block> = <tlvs-length>
<tlv>*
where:
<tlvs-length> is a 16 bit field, which contains the total length (in
octets) of all of the immediately following <tlv> elements.
<tlv> is as defined in Section 5.5.1.
5.5.1. TLVs
There are three kinds of TLV, each represented by an element <tlv>:
o A packet TLV, included in the packet TLV block in a packet header.
o A message TLV, included in the message TLV block in a message,
before the first address block.
o An address block TLV, included in an address TLV block following
an address block. An address block TLV applies to:
* all addresses in the address block; OR
* any continuous sequence of addresses in the address block; OR
* a single address in the address block.
<tlv> is defined by:
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<tlv> = <tlv-type>
<tlv-semantics>
<tlv-type-ext>?
<index-start>?
<index-stop>?
<length>?
<value>?
where:
<tlv-type> is an 8 bit field, specifying the type of the TLV,
specific to the TLV kind (i.e. packet, message, or address block
TLV).
<tlv-semantics> is an 8 bit field specifying the interpretation of
the remainder of the TLV:
bit 0 (thastypeext): if cleared ('0'), then <tlv-type-ext> is not
included in the <tlv>. If set ('1'), then <tlv-type-ext> is
included in the <tlv>.
bit 1 (thasextlen) and bit 2 (tnovalue): MUST NOT both be set
('1'). Otherwise, they are interpreted according to Table 3.
+------------+----------+--------------+--------------+
| thasextlen | tnovalue | <length> | <value> |
+------------+----------+--------------+--------------+
| 0 | 0 | 8 bits | included |
| | | | |
| 1 | 0 | 16 bits | included |
| | | | |
| 0 | 1 | not included | not included |
+------------+----------+--------------+--------------+
Table 3
bit 3 (tnoindex) and bit 4 (thassingleindex): MUST NOT both be
set ('1'). The former MUST be set ('1') and the latter MUST be
cleared ('0') for packet or message TLVs. They are interpreted
according to Table 4.
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+----------+-----------------+---------------+--------------+
| tnoindex | thassingleindex | <index-start> | <index-stop> |
+----------+-----------------+---------------+--------------+
| 0 | 0 | included | included |
| | | | |
| 1 | 0 | not included | not included |
| | | | |
| 0 | 1 | included | not included |
+----------+-----------------+---------------+--------------+
Table 4
bit 5 (tismultivalue): this bit serves to specify how the <value>
field is interpreted, as specified below. This bit MUST be
cleared ('0') for packet or message TLVs, if the
thassingleindex bit is set ('1'), or if the tnovalue bit is set
('1').
bits 6-7: are RESERVED and MUST each be cleared ('0') to be in
accordance with this version of the specification.
<tlv-type-ext> is an 8 bit field, specifying an extension of the TLV
type, specific to the TLV type and kind (i.e. packet, message, or
address block TLV).
tlv-type-ext is a variable, defined to equal <tlv-type-ext> if
present, or 0 otherwise.
tlv-fulltype is a variable, defined by:
* tlv-fulltype = 256 * <tlv-type> + tlv-type-ext;
<index-start> and <index-stop> when present are each an 8 bit field,
interpreted as follows.
index-start and index-stop are variables, defined according to
Table 5. The variable end-index is defined as follows:
* For message and packet TLVs:
+ end-index = 0
* For address block TLVs:
+ end-index = <num-addr> - 1
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+----------+-----------------+---------------+---------------+
| tnoindex | thassingleindex | index-start = | index-stop = |
+----------+-----------------+---------------+---------------+
| 0 | 0 | <index-start> | <index-stop> |
| | | | |
| 1 | 0 | 0 | end-index |
| | | | |
| 0 | 1 | <index-start> | <index-start> |
+----------+-----------------+---------------+---------------+
Table 5
For an address block TLV, the TLV applies to the addresses from
position index-start to position index-stop (inclusive) in the
address block, where the first address has position zero.
number-values is a variable, defined by:
* number-values = index-stop - index-start + 1
<length> is omitted or is an 8 or 16 bit field according to Table 3.
If the tismultivalue bit is set ('1') then <length> MUST be an
integral multiple of number-values, and the variable single-length
is defined by:
* single-length = <length> / number-values
If the tismultivalue bit is cleared ('0'), then the variable
single-length is defined by:
* single-length = <length>
<value> if present (see Table 3) is a field of length <length>
octets. In an address block TLV, <value> is associated with the
addresses from index-start to index-stop, inclusive. If the
tismultivalue bit is cleared ('0') then the whole of this field is
associated with each of the indicated addresses. If the
tismultivalue bit is set ('1') then this field is divided equally
into number-values fields, each of length single-length octets and
these are associated, in order, with the indicated addresses.
5.5.2. TLV Inclusion and Constraints
A TLV associates an attribute with a packet, a message or one or more
consecutive network addresses in an address block. The
interpretation and processing of this attribute, and the relationship
(including order of processing) between different attributes
associated with the same entity MUST be defined by a protocol which
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uses this specification.
If the appropriate semantics bit (pnouniord for a packet TLV block,
mnouniord for a message TLV block or an address TLV block) is clear
('0'), then the following constraints MUST be respected. These bits
MUST always be clear ('0') unless a protocol using this specification
defines otherwise. Protocols SHOULD only define use of these bits
when necessary, and then MUST indicate what constraints do apply if
each of the indicated bits is set ('1'); each of these constraints
SHOULD be retained unless otherwise necessary.
o TLVs in the same TLV block are sorted in non-descending tlv-
fulltype order.
o Two or more address TLVs with the same tlv-fulltype in the same
message are not associated with the same network address.
o TLVs with the same tlv-fulltype associated with the same address
block are sorted in ascending index-start order.
In addition, packet and message TLVs MUST be defined so as to
indicate whether two such TLVs with the same tlv-fulltype are, or are
not, allowed in the same packet or message TLV block, respectively.
Note that the above constrains only the encoding of TLVs in a TLV
block for transmission, and do specifically NOT mandate any given
order of processing or interpretation by a protocol of the TLVs and
the entities to which these are associated.
Respecting the constraints above allows parsing and verification of a
TLV block in a single pass and allows terminating the search for a
TLV with a specific type without traversing the entire TLV block.
The constraints on address block TLVs ensure that encoded information
(entity-attributes) can be unambiguously decoded.
5.6. Malformed Elements
An element is malformed if it cannot be parsed according to its
syntactical specification (including if there are insufficient octets
available when a length is specified, in particular if there are
fewer than pkt-size octets overall) or if a constraint (including,
but not only, those specified in Section 5.5.2) specified as one
which MUST be satisfied, is not. A protocol using this specification
MUST specify the action, or choice of actions, to be taken when a
packet containing such elements is received. Typical examples will
include discarding any affected message(s), or discarding the
complete packet.
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5.7. Padding
Packet headers and messages MAY be padded to ensure 32 bit alignment
of each message contained within the packet and of the overall packet
length. Padding MAY also be used to ensure that all packets and/or
messages have the same size.
All elements are an integer multiple of octets, hence padding can be
accomplished by inserting an integer number of <pad-octet> elements
after the element that is to be 32 bit aligned.
The number of <pad-octet> elements required to achieve this 32 bit
alignment is the smallest number (0 to 3) that, when added to the
size of the preceding elements, produces an integer multiple of 4.
<pad-octet> is an 8 bit field with all bits cleared ('0').
There is no need to indicate if padding is included, since a <pad-
octet> will always precede either a message or the end of the packet.
In the former case, the start of a message is indicated by the next
non-zero octet parsed.
The padding after a message may be freely changed when a message is
forwarded without affecting the message.
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6. IANA Considerations
6.1. Message Types
A new registry for message types must be created with initial
assignments as specified in Table 6. Future values in the range
5-127 can be allocated using standards action [3]. Additionally,
values in the range 128-255 are reserved for private/local use.
+------+------------------------+
| Type | Description |
+------+------------------------+
| 0 | MUST NOT be allocated. |
| | |
| 1-4 | RESERVED |
+------+------------------------+
Table 6
Message type 0 MUST NOT be allocated because a zero-octet signifies a
packet header and zero-octets are used for padding. Message types 1
to 4 are reserved because they are used by OLSR [4], which uses a
compatible packet/message header format.
6.2. Packet TLV Types
A new registry for packet TLV types must be created, with no initial
assignments.
Future values in the range 0-127 can be allocated using standards
action [3], respecting the following guidelines:
values 0-7 - MUST NOT be assigned except when a documented need
exists that TLVs of a given type are required to appear before all
other TLVs in the TLV block as encoded for transmission. Note
that the need for a TLV to be processed before other TLVs does not
however automatically translate into a need for the TLV to appear
before all other TLVs in the TLV block - the order in which TLVs
are to be processed MUST be defined, if applicable, in the
protocols using this specification.
values 8-127 - no constraints.
Additionally, values in the range 128-255 are reserved for private/
local use. If a packet TLV type is allocated then a new registry for
type extensions of that type must be created. A document which
defines a packet TLV type MUST also specify the mechanism by which
its type extensions are allocated, from among those in [3].
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6.3. Message TLV Types
A new registry for message TLV types must be created with no initial
assignments.
Future values in the range 0-127 can be allocated using standards
action [3], respecting the following guidelines:
values 0-7 - MUST NOT be assigned except when a documented need
exists that TLVs of a given type are required to appear before all
other TLVs in the TLV block as encoded for transmission. Note
that the need for a TLV to be processed before other TLVs does not
however automatically translate into a need for the TLV to appear
before all other TLVs in the TLV block - the order in which TLVs
are to be processed MUST be defined, if applicable, in the
protocols using this specification.
values 8-127 - no constraints.
Additionally, values in the range 128-255 are reserved for private/
local use. If a message TLV type is allocated then a new registry
for type extensions of that type must be created. A document which
defines a message TLV type MUST also specify the mechanism by which
its type extensions are allocated, from among those in [3].
6.4. Address Block TLV Types
A new registry for address block TLV types must be created, with no
initial assignments.
Future values in the range 0-127 can be allocated using standards
action [3], respecting the following guidelines:
values 0-7 - MUST NOT be assigned except when a documented need
exists that TLVs of a given type are required to appear before all
other TLVs in the TLV block as encoded for transmission. Note
that the need for a TLV to be processed before other TLVs does not
however automatically translate into a need for the TLV appearing
before all other TLVs in the TLV block - the order in which TLVs
are to be processed MUST be defined, if applicable, in the
protocols using this specification.
values 8-127 - no constraints.
Additionally, values in the range 128-255 are reserved for private/
local use. If an address block TLV type is allocated then a new
registry for type extensions of that type must be created. A
document which defines an address block TLV type MUST also specify
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the mechanism by which its type extensions are allocated, from among
those in [3].
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7. Security Considerations
This specification does not describe a protocol; it describes a
packet format. As such it does not specify any security
considerations, these are matters for a protocol using this
specification. However two mechanisms which are enabled by this
specification, and may form part of a security approach in a protocol
using this specification, are described in Section 8.1. There is
however no requirement that a protocol using this specification
should use either.
7.1. Security Suggestions
The security suggestions made here, are based on that:
o Messages are designed to be carriers of protocol information and
MAY, at each hop, be forwarded and/or processed by the protocol
using this specification.
o Packets are designed to carry a number of messages between
neighboring nodes in a single transmission and over a single
logical hop.
Consequently:
o For forwarded messages where the message is unchanged by
forwarding nodes, then end-to-end security MAY be implemented,
between nodes with an existing security association, by including
a suitable message TLV containing a cryptographic signature in the
message. Since <hop-count> and <hop-limit> are the only fields
that may be modified when such a message is forwarded in this
manner, this signature can be calculated based on the entire
message, including the message header, with the <hop-count> and
<hop-limit> fields set to zero ('0') if present.
o Hop-by-hop packet level security MAY be implemented, between nodes
with an existing security association, by including a suitable
packet TLV containing a cryptographic signature to the packet.
Since packets are received as transmitted, this signature can be
calculated based on the entire packet, or on parts thereof as
appropriate.
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8. References
8.1. Normative References
[1] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", RFC 2119, BCP 14, March 1997.
[2] Hinden, R. and S. Deering, "IP Version 6 Addressing
Architecture", RFC 4291, February 2006.
[3] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA
Considerations Section in RFCs", RFC 2434, BCP 26, October 1998.
8.2. Informative References
[4] Clausen, T. and P. Jacquet, "The Optimized Link State Routing
Protocol", RFC 3626, October 2003.
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Appendix A. Examples
This appendix contains some examples of parts of this specification.
A.1. Address Block Examples
The following examples illustrate how some combinations of addresses
may be efficiently included in address blocks. These examples are
for IPv4, with address-length equal to 4. a, b, c etc. represent
distinct, non-zero, octet values.
Note that it is permissible to use a less efficient representation,
in particular one in which the anohead and anotail bits of the
semantics octet are set, and hence head-length = 0, tail-length = 0,
mid-length = address-length, and the address block consists of the
number of addresses, the semantics octet with value 3, and a list of
the uncompressed addresses. This is also the most efficient way to
represent a single address, and the only way to represent, for
example, a.b.c.d and e.f.g.h in one address block.
Examples:
o To include a.b.c.d, a.b.e.f and a.b.g.h:
* head-length = 2;
* tail-length = 0;
* mid-length = 2;
* <addr-semantics> has anotail set (value 2);
* <tail-length> and <tail> are omitted.
The address block is then 3 2 2 a b c d e f g h (11 octets).
o To include a.b.c.g and d.e.f.g:
* head-length = 0;
* tail-length = 1;
* mid-length = 3;
* <addr-semantics> has anohead set (value 1);
* <head-length> and <head> are omitted.
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The address block is then 2 1 1 g a b c d e f (10 octets).
o To include a.b.d.e and a.c.d.e:
* head-length = 1;
* tail-length = 2;
* mid-length = 1;
* <addr-semantics> = 0.
The address block is then 2 0 1 a 2 d e b c (9 octets).
o To include a.b.0.0, a.c.0.0, and a.d.0.0:
* head-length = 1;
* tail-length = 2;
* mid-length = 1;
* <addr-semantics> has ahaszerotail set (value 4);
* <tail> is omitted.
The address block is then 3 4 1 a 2 b c d (8 octets).
o To include a.b.0.0 and c.d.0.0:
* head-length = 0;
* tail-length = 2;
* mid-length = 2;
* <addr-semantics> has anohead and ahaszerotail set (value 5);
* <head> and <tail> are omitted.
The address block is then 2 5 2 a b c d (7 octets).
o To include a.b.0.0/n and c.d.0.0/n:
* head-length = 0;
* tail-length = 2;
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* mid-length = 2;
* <addr-semantics> has anohead, ahaszerotail and ahassingleprelen
set (value 13);
* <head> and <tail> are omitted.
The address block is then 2 13 2 a b c d n (8 octets).
o To include a.b.0.0/n and c.d.0.0/m:
* head-length = 0;
* tail-length = 2;
* mid-length = 2;
* <addr-semantics> has anohead, ahaszerotail and ahasmultiprelen
set (value 21);
* <head> and <tail> are omitted.
The address block is then 2 21 2 a b c d n m (9 octets).
A.2. TLV Examples
Assuming the definition of an address block TLV with type EXAMPLE1
(and no type extension) which has single octet single values, then if
values a, a, b and c are to be associated with the four addresses in
the preceding address block, where c is a default value that can be
omitted, then this can be done in a number of ways. Possible
examples are:
o Using one multivalue TLV covering all of the addresses:
* <tlv-semantics> has tnoindex and tismultivalue set (value 40);
* <index-start> and <index-stop> are omitted;
* <length> = 4 (single-length = 1).
* The TLV is then EXAMPLE1 40 4 a a b c (7 octets).
o Using one multivalue TLV omitting the last address:
* <tlv-semantics> has tismultivalue set (value 32);
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* <index-start> = 0;
* <index-stop> = 2
* <length> = 3 (single-length = 1).
* The TLV is then EXAMPLE1 32 0 2 3 a a b (8 octets).
o Using two single value TLVs, omitting the last address. First:
* <tlv-semantics> = 0;
* <index-start> = 0;
* <index-stop> = 1;
* <length> = 1;
* <value> = a.
* The TLV is then EXAMPLE1 0 0 0 1 1 a (6 octets).
Second:
* <tlv-semantics> has thassingleindex set (value 16);
* <index-start> = 2;
* <index-stop> is omitted;
* <length> = 1;
* <value> = b.
* The TLV is then EXAMPLE1 16 2 1 b (5 octets).
Total length of TLVs is 11 octets.
In this case the first of these is the most efficient. In other
cases patterns such as the others may be preferred. Regardless of
efficiency, any of these may be used.
Assuming the definition of an address block TLV with type EXAMPLE2
(and no type extension) which has no value, which is to be associated
with the second and third addresses in an address block, then this
can be indicated with a single TLV:
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o <tlv-semantics> has tnovalue set (value 4);
o <index-start> = 1;
o <index-stop> = 2;
o <length> and <value> are omitted.
o The TLV is then EXAMPLE2 4 1 2 (4 octets).
Assuming the definition of a message TLV with type EXAMPLE3 (and no
type extension) which can take a value field of any length, for such
a TLV with 8 octets of data (a to h):
o <tlv-semantics> has tnoindex set (value 8);
o <index-start> and <index-stop> are omitted;
o <length> = 8.
o The TLV is then EXAMPLE3 8 8 a b c d e f g h (11 octets).
If, in this example, the number of data octets were 256 or greater
then <tlv-semantics> would also have thasextlen set and have value
10. The length would require two octets (most significant first).
The TLV length would be 4 + N octets, where N is the number of data
octets (it can be 3 + N octets if N is 255 or less).
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Appendix B. Illustrations
This informative appendix illustrates the elements, which are
normatively specified in Section 5 using regular expressions.
Examples with version fields are omitted, as not needed when using
this version of this specification (although permitted).
Bits labeled Rsv or R must be cleared ('0'). Bits labeled C, N, or M
may be cleared ('0') or set ('1'). Octets labeled Padding must be
zero ('0'), and are optional. (They have been omitted where not
needed for alignment.)
Appendix B.1. Packet
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|0|0|0|0| Packet Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|0|0|1|0| Packet Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Packet Sequence Number | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|0|1|0|0| Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|0|1|1|0| Packet Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|1|0|0|0| Packet Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Packet TLV Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|1|0|1|0| Packet Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Packet Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Packet TLV Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|1|1|0|0| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Packet TLV Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| Rsv |C|1|1|1|0| Packet Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Packet TLV Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message + Padding |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Appendix B.2. Message and Padding
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|0|0|0|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Hop Count | Message Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|0|0|0|0|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Hop Count | Message Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 36]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|0|0|1|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Count | Message Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|0|0|0|1|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Count | Message Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|0|1|0|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Message Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 37]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|0|1|0|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Message Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|0|1|1|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|0|1|1|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Sequence Number | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 38]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|0|0|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Hop Count | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|0|0|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Hop Count | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|0|1|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Count | |
+-+-+-+-+-+-+-+-+ |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 39]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|0|1|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Count | |
+-+-+-+-+-+-+-+-+ |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|1|0|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | |
+-+-+-+-+-+-+-+-+ |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|1|0|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | |
+-+-+-+-+-+-+-+-+ |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 40]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|1|1|0|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |R|C|N|1|1|1|1|0| Message Size |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message Body |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 41]
Internet-Draft MANET packet format November 2007
Appendix B.3. Message Body
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Message TLV Block |
| +-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Address Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+ |
| Address TLV Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Address Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Address TLV Block |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 42]
Internet-Draft MANET packet format November 2007
Appendix B.4. Address Block
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|0|0|0|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Tail Length | Tail |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|0|0|0|1| Tail Length | Tail |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tail (cont) | Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|0|0|1|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 43]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|0|0|1|1| Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|0|1|0|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Tail Length | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|0|1|0|1| Tail Length | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | |
+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 44]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|1|0|0|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Tail Length | Tail |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Prefix Length |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|1|0|0|1| Tail Length | Tail |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tail (cont) | Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|1|0|1|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 45]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|1|0|1|1| Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|1|1|0|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Tail Length | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |0|1|1|0|1| Tail Length | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | |
+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 46]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |1|0|0|0|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Tail Length | Tail |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Prefix Length | |
+-+-+-+-+-+-+-+-+ |
: ... :
| +-+-+-+-+-+-+-+-+
| | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |1|0|0|0|1| Tail Length | Tail |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tail (cont) | Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 47]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |1|0|0|1|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Mid | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |1|0|0|1|1| Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | Prefix Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 48]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |1|0|1|0|0| Head Length | Head |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head (cont) | Tail Length | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | Prefix Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number Addrs | Rsv |1|0|1|0|1| Tail Length | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid (cont) | |
+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Mid | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Prefix Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 49]
Internet-Draft MANET packet format November 2007
Appendix B.5. TLV Block
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| TLV |
| +-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
: ... :
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| TLV |
| +-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Appendix B.6. TLV
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|0|0|0|0| Index Start | Index Stop |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length | |
+-+-+-+-+-+-+-+-+ |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
Clausen, et al. Expires May 17, 2008 [Page 50]
Internet-Draft MANET packet format November 2007
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|0|0|0|1| Type Ext | Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Index Stop | Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|0|0|1|0| Index Start | Index Stop |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|0|0|1|1| Type Ext | Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Index Stop | Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|0|0|1|0|0| Index Start | Index Stop |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|0|0|1|0|1| Type Ext | Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Index Stop |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|1|0|0|0| Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|1|0|0|1| Type Ext | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|1|0|1|0| Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|M|0|1|0|1|1| Type Ext | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length (cont) | |
+-+-+-+-+-+-+-+-+ |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|0|1|1|0|0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|0|1|1|0|1| Type Ext |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|1|0|0|0|0| Index Start | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|1|0|0|0|1| Type Ext | Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length | |
+-+-+-+-+-+-+-+-+ |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|1|0|0|1|0| Index Start | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length (cont) | |
+-+-+-+-+-+-+-+-+ |
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|1|0|0|1|1| Type Ext | Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Value |
| |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|1|0|1|0|0| Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type |Rsv|0|1|0|1|0|1| Type Ext | Index Start |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Appendix C. Complete Example
An example packet, using IPv4 addresses (length four octets) is
shown. This packet has a header, indicated by the initial octet 0.
The packet header has semantics octet 0, and hence has version zero,
a packet sequence number, but no packet TLV block.
The packet contains a single message. This message has semantics
octet 0, and hence has a complete message header, other than version
(which is zero), including originator address, hop limit, hop count
and message sequence number (which is type independent). The message
has a message TLV block with content length 9 octets, containing a
single message TLV. This TLV has the tnoindex bit of its semantics
octet 8 set, and has value length 6 octets. The message then has two
address blocks each with a following address TLV block.
The first address block contains 2 network addresses. It has the
anohead, ahaszerotail and ahassingleprelen bits of its semantics
octet 13 set, and has tail length 2 octets, hence mid length two
octets. The two tail octets of each address are zero. The address
block has a single prefix length. The following address TLV block is
empty (content length 0 octets).
The second address block contains 3 addresses, without prefix
lengths. It has the anotail bit of its semantics octet 2 set, and
has head length 2 octets, hence mid length two octets. It is
followed by an address TLV block, with content length 9 octets,
containing two address block TLVs. The first of these TLVs has the
tnoindex bit of its semantics octet 8 set, and has a single value of
length 2 octets, which applies to all of the addresses in the address
block. The second of these TLVs has the tnovalue bit of its
semantics octet 4 set, and hence has no length or value fields. It
does have index fields, which indicate those addresses this TLV
applies to.
There is one final padding octet value 0 that is not included in the
message length of 55 octets.
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0| Packet Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Message Type |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originator Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Hop Limit | Hop Count | Message Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1| TLV Type |0 0 0 0 1 0 0 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 1 1 0| Value |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Value (cont) |0 0 0 0 0 0 1 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 1 1 0 1|0 0 0 0 0 0 1 0| Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | Prefix Length |0 0 0 0 0 0 0 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0|0 0 0 0 0 0 1 1|0 0 0 0 0 0 1 0|0 0 0 0 0 0 1 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Head | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mid | Mid |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1| TLV Type |0 0 0 0 1 0 0 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 1 0| Value | TLV Type |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 1 0 0| Index Start | Index Stop |0 0 0 0 0 0 0 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Appendix D. Contributors
This specification is the result of the joint efforts of the
following contributors from the OLSRv2 Design Team -- listed
alphabetically.
o Cedric Adjih, INRIA, France, <Cedric.Adjih@inria.fr>
o Emmanuel Baccelli, INRIA, France, <Emmanuel.Baccelli@inria.fr>
o Thomas Heide Clausen, LIX, Ecole Polytechnique, France,
<T.Clausen@computer.org>
o Justin W. Dean, NRL, USA<jdean@itd.nrl.navy.mil>
o Christopher Dearlove, BAE Systems, UK,
<chris.dearlove@baesystems.com>
o Satoh Hiroki, Hitachi SDL, Japan, <h-satoh.yj@sdl.hitachi.co.jp>
o Philippe Jacquet, INRIA, France, <Philippe.Jacquet@inria.fr>
o Monden Kazuya, Hitachi SDL, Japan, <monden.vw@sdl.hitachi.co.jp>
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Appendix E. Acknowledgements
The authors would like to acknowledge the team behind OLSRv1, as
specified in RFC 3626, including Anis Laouiti, Pascale Minet, Laurent
Viennot (all at INRIA, France), and Amir Qayyum (Center for Advanced
Research in Engineering, Pakistan) for their contributions.
The authors would like to gratefully acknowledge the following people
for intense technical discussions, early reviews and comments on the
specification and its components: Joe Macker (NRL), Alan Cullen (BAE
Systems), Ian Chakeres (Motorola), Charlie E. Perkins (Nokia),
Andreas Schjonhaug (LIX), Florent Brunneau (LIX), Yasunori Owada
(Niigata University), Teco Boot (Infinity Networks) and the entire
IETF MANET working group.
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Authors' Addresses
Thomas Heide Clausen
LIX, Ecole Polytechnique, France
Phone: +33 6 6058 9349
Email: T.Clausen@computer.org
URI: http://www.thomasclausen.org/
Christopher M. Dearlove
BAE Systems Advanced Technology Centre
Phone: +44 1245 242194
Email: chris.dearlove@baesystems.com
URI: http://www.baesystems.com/
Justin W. Dean
Naval Research Laboratory
Phone: +1 202 767 3397
Email: jdean@itd.nrl.navy.mil
URI: http://pf.itd.nrl.navy.mil/
Cedric Adjih
INRIA Rocquencourt
Phone: +33 1 3963 5215
Email: Cedric.Adjih@inria.fr
URI: http://menetou.inria.fr/~adjih/
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Full Copyright Statement
Copyright (C) The IETF Trust (2007).
This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors
retain all their rights.
This document and the information contained herein are provided on an
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Clausen, et al. Expires May 17, 2008 [Page 61]
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