SIPPING Working Group Miguel Garcia, Ericsson
Internet Draft Carsten Bormann, TZI/Uni Bremen
Joerg Ott, TZI/Uni Bremen
Richard Price, Siemens/Roke Manor
Adam Roach, dynamicsoft
Expires: February 2003
August 2002
The Session Initiation Protocol (SIP) and Session Description Protocol
(SDP) static dictionary for Signaling Compression (SigComp)
<draft-ietf-sipping-sigcomp-sip-dictionary-04.txt>
Status of this memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that other
groups may also distribute working documents as Internet-Drafts.
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and may be updated, replaced, or obsoleted by other documents at any
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The list of current Internet-Drafts can be accessed at
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This document is an individual submission to the IETF. Comments
should be directed to the authors.
Abstract
The Session Initiation Protocol (SIP) [2] is a text-based protocol
for initiating and managing communication sessions. The protocol can
be compressed by using Signaling Compression (SigComp) [1].
Similarly, the Session Description Protocol (SDP) [24] is a text-
based protocol intended for describing multimedia sessions for the
purposes of session announcement, session invitation, and other forms
of multimedia session initiation. This memo defines the SIP/SDP-
specific static dictionary that SigComp may use in order to achieve
higher efficiency. The dictionary is compression algorithm
independent.
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Table of contents
1. Introduction....................................................2
2. Design considerations...........................................2
3. Binary representation of the SIP/SDP dictionary.................5
4. Security Considerations.........................................12
5. IANA Considerations.............................................12
6. Authors' Addresses..............................................12
7. Acknowledgements................................................13
8. References......................................................13
8.1 Normative references...........................................13
8.2 Informative references.........................................13
Appendix A. SIP input strings to the SIP/SDP static dictionary.....17
Appendix B. SDP input strings to the SIP/SDP static dictionary.....25
Full Copyright Statement...........................................28
1. Introduction
SIP [2] and SDP [1] are text-based protocols that use the UTF-8
charset (RFC 2279 [4]). SIP and SDP were designed for rich bandwidth
links. However, when SIP/SDP is run over narrow bandwidth links, such
as radio interfaces or low speed serial links, the session setup time
increases substantially, compared to an operation over a rich
bandwidth link.
The session setup time can decrease dramatically if the SIP/SDP
signaling is compressed. The signaling compression mechanisms
specified in SigComp [1] provide a multiple compression/decompression
algorithm framework to compress and decompress text-based protocols
such as SIP and SDP.
When compression is used in SIP/SDP, the compression achieves its
maximum rate once a few message exchanges have taken place. This is
due to the fact that the first message the compressor sends to the
decompressor is only partially compressed, as there is not a previous
stored state to compress against. As the goal is to reduce the
session setup time as much as possible, it seems sensible to
investigate a mechanism to boost the compression rate from the first
message.
In this memo we introduce the static dictionary for SIP and SDP. The
dictionary is to be used in conjunction with SIP, SDP and SigComp.
The static SIP/SDP dictionary constitutes a SigComp state that can be
referenced in the first SIP message that the compressor sends out.
2. Design considerations
The static SIP/SDP dictionary is a collection of well-known strings
that appear in most of the SIP and SDP messages. The dictionary is
not a comprehensive list of reserved words, but it includes many of
the strings that appear in SIP and SDP signaling.
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The static dictionary is unique and MUST be available in all SigComp
implementations for SIP/SDP. The dictionary is not intended to evolve
as SIP or SDP evolve. It is defined once, and stays as is forever.
This solves the problems of updating, upgrading and finding out the
dictionary that is supported at the remote end when several versions
of the same dictionary coexist.
Appendix A contains the collection of strings that SIP contributed to
the static dictionary. The appendix includes references to the
documents that define those strings.
Appendix B contains the collection of strings that SDP contributed to
the static dictionary. Again, the appendix includes references to the
documents that define those strings.
While these appendices are of an informative nature, Section 3 gives
the normative binary form of the SIP/SDP dictionary. This is the
dictionary that is included in the SigComp implementation. This
dictionary has been formed from the collection of individual
dictionaries given in appendices A and B.
The two input collections are collections of UTF-8 encoded character
strings. In order to facilitate the readability, the appendices
describe them in one table for each collection. In these tables,
each row represents an entry. Each entry contains the string that
actually occurs in the dictionary, its priority (see below), its
offset from the first octet and its length (both in hexadecimal), and
one or more references that elucidate why this string is expected to
occur in SIP/SDP messages.
The columns in the tables are described as follows:
String: represents the UTF-8 string that is inserted into the
dictionary. Note that the quotes (") are not part of the string
itself. Note also that the notation [CRLF] represents a Carriage
Return character (ASCII code 0x0D) followed by a Line Feed character
(ASCII code 0x0A).
Pr: indicates the priority of this string within the dictionary. Some
compression algorithms, such as DEFLATE, offer an increased
efficiency when the most commonly used strings are located at the
bottom of the dictionary. To facilitate generating a dictionary that
has the most-frequently occurring strings further down at the bottom,
we have decided to allocate a priority to each string in the
dictionary. Priorities range from 1 until 5. A low number in the
priority column (e.g., 1) indicate that we believe in a high
probability of finding the string in SIP or SDP messages. A high
number in the priority column (e.g., 5) indicates lower probability
of finding the string in a SIP or SDP message. This is typically the
case for less frequent error codes or optional infrequent tags.
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Off: indicates the hexadecimal offset of the entry with respect the
first octet in the dictionary. Note that several strings in the
collections can share space in the dictionary if they exhibit
suitable common substrings.
Len: the length of the string (in hexadecimal).
References: contains one or more references to the specification and
the section within the specification where the string is defined.
Note that the strings stored in the dictionary are case sensitive.
(Again, the strings do not comprise the quotes ("), they are just
shown here to increase the readability.) Where the string is a header
field, we also included the colon ":" and the amount of white space
expected to occur. Note that this means that not all messages that
conform to the SIP Augmented BNF, which allows other combinations
(e.g., a white space or horizontal tabulator before the colon (":")
sign), will benefit as much from the dictionary -- the best increase
in compression performance is to be expected for messages that use
the recommended formatting guidelines for SIP.
Some strings appear followed by an equal sign and some others do not.
This depends on whether the string is part of a parameter name or a
parameter value.
In a SIP message, all the SIP headers terminate with a CRLF pair of
characters. As these characters are appended to the end of each SIP
header line, right after the header values, and because the header
values are typically not part of the static SIP dictionary, we cannot
include the terminating CRLF as part of the SIP static dictionary.
Instead, the approach we have taken is to include in each header
field entry the CRLF from the previous line that prefixes every
header field. We have represented CRLF by the notation [CRLF].
Therefore, in generating the actual binary dictionary, an entry in
the dictionary represented as: "[CRLF]From: " has been interpreted as
an entry whose value is CR, LF, the word From, a colon and a
whitespace.
Note that most SIP header field names are included with the full
string from CRLF to the colon-blank pair. However, in certain
situations, when the likelihood of occurrence is not considered high
(as indicated by a priority value of 3 to 5), and when there are
common substrings shared by a number of headers, we have added one
entry with the common substring and several entries with the non-
common substrings remaining. An example is the "Proxy-Authenticate"
and "Proxy-Authorization" headers. There are three entries in the
dictionary: the common substring "[CRLF]Proxy-", and the non-common
substrings "Authenticate: " and "Authorization: ". This allows the
re-use of the non-common substrings by other entries and may save a
number of bytes in the binary form of the dictionary. Note that this
splitting mechanism does not apply with strings that are likely to
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occur very often (those whose priority is set to 1 or 2).
SIP responses start with a status code (e.g., "302") and a reason
phrase (e.g., "Moved Temporarily"). The status code is a normative
part, whereas the reason phrase is not normative, it is just a
suggested text. For instance, both "302 Moved Temporarily" and "302
Redirect" are valid beginnings of SIP responses.
In the SIP dictionary we have included two entries per response code,
one including only the status code and a space (e.g. "302 ") and
another one including both the status code and the suggested reason
phrase (e.g., "302 Moved Temporarily"). The former can be used when
the SIP response changed the suggested reason phrase by another one.
The later can be used when the suggested reason phrase is part of the
response. In this way, we accommodate both alternatives. (Note that
in the actual dictionary, both strings occupy the same space in the
string subset, but have two separate entries in the table subset.)
3. Binary representation of the SIP/SDP dictionary
This section contains the result of combining the SIP and the SDP
dictionaries described in appendices A and B in order to create a
single dictionary that is loaded into SigComp as a state.
The binary SigComp dictionary is comprised of two parts, the
concatenation of which serves as the state value of the state item: A
string subset, which contains all strings in the contributing
collections as a substring (roughly ordered such that strings with
low priority numbers occur at the end), and a table subset, which
contains pairs of length and offset values for all the strings in the
contributing collections. In each of these pairs, the length is
stored as a one-byte value, and the offset is stored as a two-byte
value that has had 1024 added to the offset (this allows direct
referencing from the stored value if the dictionary state has been
loaded at address 1024).
The intention is that all compression algorithms will be able to use
the (or part of the) string subset, and some compression methods,
notably those that are related to the LZ78 family, will also use the
table in order to form an initial set of tokens for that compression
method. The text below therefore gives examples for referencing both
the table subset and the string subset of the dictionary state item.
As defined in section 3.3.3 in the Signaling Compression
specification [1], a SigComp state is characterized by a certain set
of information. For the static SIP/SDP dictionary, the information
in the following Table 1 fully characterizes the state item.
Note that the string subset of the dictionary can be accessed using:
STATE-ACCESS (%ps, 6, 0, 0x0D8F, %sa, 0),
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and the table subset can be accessed using:
STATE-ACCESS (%ps, 6, 0x0D8F, 0x0558, %sa, 0),
where %ps points to UDVM memory containing
0x450a414e6584
and %sa is the desired destination address in UDVM memory (with
UDVM byte copying rules applied).
If only a subset of the dictionary up to a specific priority is
desired (e.g., to save UDVM space), the values for the third and
forth operand in these STATE-ACCESS instructions can be changed to:
Priorities String String Table Table
desired offset length offset length
========== ====== ====== ====== ======
1 only 0x0CD4 0x00BB 0x0D8F 0x0033
1..2 0x0937 0x0458 0x0D8F 0x013E
1..3 0x07C0 0x05CF 0x0D8F 0x01A1
1..4 0x0085 0x0D0A 0x0D8F 0x044A
1..5 0x0000 0x0D8F 0x0D8F 0x0558
The state item consists of the following elements:
Name: Value:
===================== ========================
state_identifier 0x450a414e6584c810e10ec83c1d90f9a5c5bd3cf1
state_length 0x12E7
state_address 0 (not relevant for the dictionary)
state_instruction 0 (not relevant for the dictionary)
minimum_access_length 6
state_value Representation of the table below.
0000 0d0a 5265 6a65 6374 2d43 6f6e 7461 6374 ..Reject-Contact
0010 3a20 0d0a 4572 726f 722d 496e 666f 3a20 : ..Error-Info:
0020 0d0a 4361 6c6c 2d49 6e66 6f3a 200d 0a54 ..Call-Info: ..T
0030 696d 6573 7461 6d70 3a20 0d0a 5265 706c imestamp: ..Repl
0040 792d 546f 3a20 0d0a 5375 626a 6563 743a y-To: ..Subject:
0050 200d 0a57 6172 6e69 6e67 3a20 3b68 616e ..Warning: ;han
0060 646c 696e 673d 696d 6167 653b 7075 7270 dling=image;purp
0070 6f73 653d 3b63 6175 7365 3d3b 7465 7874 ose=;cause=;text
0080 3d63 6172 6433 3030 204d 756c 7469 706c =card300 Multipl
0090 6520 4368 6f69 6365 736d 696d 6573 7361 e Choicesmimessa
00A0 6765 2f73 6970 6672 6167 3430 3720 5072 ge/sipfrag407 Pr
00B0 6f78 7920 4175 7468 656e 7469 6361 7469 oxy Authenticati
00C0 6f6e 2052 6571 7569 7265 6469 6765 7374 on Requiredigest
00D0 2d69 6e74 6567 7269 7479 3438 3420 4164 -integrity484 Ad
00E0 6472 6573 7320 496e 636f 6d70 6c65 7465 dress Incomplete
00F0 6c65 7068 6f6e 652d 6576 656e 7473 3439 lephone-events49
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0100 3420 5365 6375 7269 7479 2041 6772 6565 4 Security Agree
0110 6d65 6e74 2052 6571 7569 7265 6465 6163 ment Requiredeac
0120 7469 7661 7465 6434 3831 2043 616c 6c2f tivated481 Call/
0130 5472 616e 7361 6374 696f 6e20 446f 6573 Transaction Does
0140 204e 6f74 2045 7869 7374 616c 653d 3530 Not Existale=50
0150 3020 5365 7276 6572 2049 6e74 6572 6e61 0 Server Interna
0160 6c20 4572 726f 726f 6275 7374 2d73 6f72 l Errorobust-sor
0170 7469 6e67 3d34 3136 2055 6e73 7570 706f ting=416 Unsuppo
0180 7274 6564 2055 5249 2053 6368 656d 6572 rted URI Schemer
0190 6765 6e63 7934 3135 2055 6e73 7570 706f gency415 Unsuppo
01A0 7274 6564 204d 6564 6961 2054 7970 656e rted Media Typen
01B0 6469 6e67 3438 3820 4e6f 7420 4163 6365 ding488 Not Acce
01C0 7074 6162 6c65 2048 6572 656a 6563 7465 ptable Herejecte
01D0 6451 2e38 3530 3520 5665 7273 696f 6e20 dQ.8505 Version
01E0 4e6f 7420 5375 7070 6f72 7465 6434 3233 Not Supported423
01F0 2049 6e74 6572 7661 6c20 546f 6f20 4272 Interval Too Br
0200 6965 6672 6f6d 2d74 6167 3430 3320 466f iefrom-tag403 Fo
0210 7262 6964 6465 6e6f 6e2d 7572 6765 6e74 rbiddenon-urgent
0220 3432 3920 5072 6f76 6964 6520 5265 6665 429 Provide Refe
0230 7272 6f72 2049 6465 6e74 6974 7934 3230 rror Identity420
0240 2042 6164 2045 7874 656e 7369 6f6e 6f72 Bad Extensionor
0250 6573 6f75 7263 650d 0a61 3d6b 6579 2d6d esource..a=key-m
0260 676d 743a 4d49 4b45 594f 5054 494f 4e53 gmt:MIKEYOPTIONS
0270 204c 616e 6775 6167 653a 2035 3034 2053 Language: 504 S
0280 6572 7665 7220 5469 6d65 2d6f 7574 6f2d erver Time-outo-
0290 7461 670d 0a41 7574 6865 6e74 6963 6174 tag..Authenticat
02A0 696f 6e2d 496e 666f 3a20 4465 6320 3338 ion-Info: Dec 38
02B0 3020 416c 7465 726e 6174 6976 6520 5365 0 Alternative Se
02C0 7276 6963 6535 3033 2053 6572 7669 6365 rvice503 Service
02D0 2055 6e61 7661 696c 6162 6c65 3430 3520 Unavailable405
02E0 4d65 7468 6f64 204e 6f74 2041 6c6c 6f77 Method Not Allow
02F0 6564 3432 3120 4578 7465 6e73 696f 6e20 ed421 Extension
0300 5265 7175 6972 6564 3438 3720 5265 7175 Required487 Requ
0310 6573 7420 5465 726d 696e 6174 6564 6175 est Terminatedau
0320 7468 2d69 6e74 6572 6c65 6176 696e 673d th-interleaving=
0330 0d0a 6d3d 6170 706c 6963 6174 696f 6e20 ..m=application
0340 4175 6720 3330 3220 4d6f 7665 6420 5465 Aug 302 Moved Te
0350 6d70 6f72 6172 696c 7933 3031 204d 6f76 mporarily301 Mov
0360 6564 2050 6572 6d61 6e65 6e74 6c79 3531 ed Permanently51
0370 3320 4d65 7373 6167 6520 546f 6f20 4c61 3 Message Too La
0380 7267 656d 756c 7469 7061 7274 2f73 6967 rgemultipart/sig
0390 6e65 6436 3837 2044 6961 6c6f 6720 5465 ned687 Dialog Te
03A0 726d 696e 6174 6564 0d0a 5265 7472 792d rminated..Retry-
03B0 4166 7465 723a 2047 4d54 6875 2c20 3430 After: GMThu, 40
03C0 3220 5061 796d 656e 7420 5265 7175 6972 2 Payment Requir
03D0 6564 0d0a 613d 6f72 6965 6e74 3a6c 616e ed..a=orient:lan
03E0 6473 6361 7065 3430 3020 4261 6420 5265 dscape400 Bad Re
03F0 7175 6573 7472 7565 3439 3120 5265 7175 questrue491 Requ
0400 6573 7420 5065 6e64 696e 6735 3031 204e est Pending501 N
0410 6f74 2049 6d70 6c65 6d65 6e74 6564 0d0a ot Implemented..
0420 613d 7479 7065 3a62 726f 6164 6361 7374 a=type:broadcast
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0430 6f6e 6536 3036 204e 6f74 2041 6363 6570 one606 Not Accep
0440 7461 626c 6534 3036 204e 6f74 2041 6363 table406 Not Acc
0450 6570 7461 626c 6534 3933 2055 6e64 6563 eptable493 Undec
0460 6970 6865 7261 626c 650d 0a4d 494d 452d ipherable..MIME-
0470 5665 7273 696f 6e3a 204d 6179 2034 3832 Version: May 482
0480 204c 6f6f 7020 4465 7465 6374 6564 0d0a Loop Detected..
0490 4f72 6761 6e69 7a61 7469 6f6e 3a20 4a75 Organization: Ju
04A0 6e20 6d6f 6465 2d63 6861 6e67 652d 6e65 n mode-change-ne
04B0 6967 6862 6f72 3d63 7269 7469 6361 6c65 ighbor=criticale
04C0 7274 6370 2d66 6234 3839 2042 6164 2045 rtcp-fb489 Bad E
04D0 7665 6e74 6c73 0d0a 556e 7375 7070 6f72 ventls..Unsuppor
04E0 7465 643a 204a 616e 2035 3032 2042 6164 ted: Jan 502 Bad
04F0 2047 6174 6577 6179 6d6f 6465 2d63 6861 Gatewaymode-cha
0500 6e67 652d 7065 7269 6f64 3d0d 0a61 3d6f nge-period=..a=o
0510 7269 656e 743a 7365 6173 6361 7065 0d0a rient:seascape..
0520 613d 7479 7065 3a6d 6f64 6572 6174 6564 a=type:moderated
0530 3330 3520 5573 6520 5072 6f78 7934 3034 305 Use Proxy404
0540 204e 6f74 2046 6f75 6e64 0d0a 613d 7479 Not Found..a=ty
0550 7065 3a72 6563 766f 6e6c 790d 0a61 3d74 pe:recvonly..a=t
0560 7970 653a 6d65 6574 696e 674d 4553 5341 ype:meetingMESSA
0570 4745 200d 0a6b 3d70 726f 6d70 743a 0d0a GE ..k=prompt:..
0580 496e 2d52 6570 6c79 2d54 6f3a 200d 0a52 In-Reply-To: ..R
0590 6566 6572 7265 642d 4279 3a20 5452 5545 eferred-By: TRUE
05A0 6e63 6f64 696e 673a 2031 3832 2051 7565 ncoding: 182 Que
05B0 7565 640d 0a55 7365 722d 4167 656e 743a ued..User-Agent:
05C0 200d 0a41 6c65 7274 2d49 6e66 6f3a 2041 ..Alert-Info: A
05D0 7574 6865 6e74 6963 6174 653a 200d 0a61 uthenticate: ..a
05E0 3d66 7261 6d65 7261 7465 3a43 414e 4345 =framerate:CANCE
05F0 4c20 0d0a 613d 6d61 7870 7469 6d65 3a3b L ..a=maxptime:;
0600 7265 7472 792d 6166 7465 723d 7561 6368 retry-after=uach
0610 616e 6e65 6c73 3d34 3130 2047 6f6e 650d annels=410 Gone.
0620 0a52 6566 6572 2d54 6f3a 200d 0a50 7269 .Refer-To: ..Pri
0630 6f72 6974 793a 200d 0a61 3d71 7561 6c69 ority: ..a=quali
0640 7479 3a0d 0a61 3d73 6470 6c61 6e67 3a0d ty:..a=sdplang:.
0650 0a52 6570 6c61 6365 733a 200d 0a61 3d63 .Replaces: ..a=c
0660 6861 7273 6574 3a0d 0a6d 3d63 6f6e 7472 harset:..m=contr
0670 6f6c 2052 4546 4552 2069 7073 6563 2d69 ol REFER ipsec-i
0680 6b65 3b74 7261 6e73 706f 7274 3d0d 0a61 ke;transport=..a
0690 3d6b 6579 7764 733a 0d0a 6b3d 6261 7365 =keywds:..k=base
06A0 3634 3a3b 7265 6672 6573 6865 723d 3b72 64:;refresher=;r
06B0 6563 6569 7665 643d 0d0a 6b3d 636c 6561 eceived=..k=clea
06C0 723a 3b64 7572 6174 696f 6e3d 0d0a 4163 r:;duration=..Ac
06D0 6365 7074 3a20 0d0a 613d 6772 6f75 703a cept: ..a=group:
06E0 0d0a 613d 7074 696d 653a 4641 4c53 453a ..a=ptime:FALSE:
06F0 2049 4e46 4f20 0d0a 613d 746f 6f6c 3a0d INFO ..a=tool:.
0700 0a61 3d6c 616e 673a 0d0a 6d3d 6461 7461 .a=lang:..m=data
0710 206d 6f64 652d 7365 743d 0d0a 4163 6365 mode-set=..Acce
0720 7074 2d54 4c53 756e 2c20 0d0a 4461 7465 pt-TLSun, ..Date
0730 3a20 0d0a 613d 6361 743a 0d0a 6b3d 7572 : ..a=cat:..k=ur
0740 693a 0d0a 5072 6f78 792d 3b72 6561 736f i:..Proxy-;reaso
0750 6e3d 3b6d 6574 686f 643d 0d0a 613d 6d69 n=;method=..a=mi
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0760 643a 3b6d 6164 6472 3d6f 7061 7175 653d d:;maddr=opaque=
0770 0d0a 4d69 6e2d 3b61 6c67 3d4d 6f6e 2c20 ..Min-;alg=Mon,
0780 5475 652c 2057 6564 2c20 4672 692c 2053 Tue, Wed, Fri, S
0790 6174 2c20 3b74 746c 3d61 7574 733d 0d0a at, ;ttl=auts=..
07A0 693d 0d0a 7a3d 0d0a 753d 0d0a 653d 3b69 i=..z=..u=..e=;i
07B0 643d 6372 633d 0d0a 723d 7561 733b 713d d=crc=..r=uas;q=
07C0 3431 3420 5265 7175 6573 742d 5552 4920 414 Request-URI
07D0 546f 6f20 4c6f 6e67 6976 6575 7072 6976 Too Longiveupriv
07E0 6163 7975 6470 7265 6665 7236 3030 2042 acyudprefer600 B
07F0 7573 7920 4576 6572 7977 6865 7265 7175 usy Everywherequ
0800 6972 6564 3438 3020 5465 6d70 6f72 6172 ired480 Temporar
0810 696c 7920 556e 6176 6169 6c61 626c 650d ily Unavailable.
0820 0a61 3d74 7970 653a 482e 3333 3230 3220 .a=type:H.33202
0830 4163 6365 7074 6564 0d0a 5365 7373 696f Accepted..Sessio
0840 6e2d 4578 7069 7265 733a 200d 0a53 7562 n-Expires: ..Sub
0850 7363 7269 7074 696f 6e2d 5374 6174 653a scription-State:
0860 204e 6f76 200d 0a53 6572 7669 6365 2d52 Nov ..Service-R
0870 6f75 7465 3a20 5365 7020 0d0a 416c 6c6f oute: Sep ..Allo
0880 772d 4576 656e 7473 3a20 4665 6220 0d0a w-Events: Feb ..
0890 5265 636f 7264 2d52 6f75 7465 3a20 4a75 Record-Route: Ju
08A0 6c20 0d0a 613d 696e 6163 7469 7665 5254 l ..a=inactiveRT
08B0 502f 4156 5046 2052 5450 2f53 4156 5020 P/AVPF RTP/SAVP
08C0 416e 6f6e 796d 6f75 7369 7073 3a0d 0a61 Anonymousips:..a
08D0 3d74 7970 653a 7465 7374 656c 3a0d 0a61 =type:testel:..a
08E0 3d72 6563 766f 6e6c 790d 0a45 7665 6e74 =recvonly..Event
08F0 3a20 2020 200d 0a61 3d73 656e 646f 6e6c : ..a=sendonl
0900 790d 0a63 3d49 4e20 4950 3420 0d0a 5265 y..c=IN IP4 ..Re
0910 6173 6f6e 3a20 0d0a 416c 6c6f 773a 200d ason: ..Allow: .
0920 0a50 6174 683a 203b 7573 6572 3d0d 0a62 .Path: ;user=..b
0930 3d43 5420 4153 200d 0a57 5757 2d41 7574 =CT AS ..WWW-Aut
0940 6865 6e74 6963 6174 653a 2044 6967 6573 henticate: Diges
0950 7420 0d0a 613d 7365 6e64 7265 6376 6964 t ..a=sendrecvid
0960 656f 6374 6574 2d61 6c69 676e 3d61 7070 eoctet-align=app
0970 6c69 6361 7469 6f6e 2f73 6470 6174 6865 lication/sdpathe
0980 6164 6572 7370 6175 7468 3d0d 0a61 3d6f aderspauth=..a=o
0990 7269 656e 743a 706f 7274 7261 6974 696d rient:portraitim
09A0 656f 7574 7472 2d69 6e74 6963 6f6e 633d eouttr-inticonc=
09B0 3438 3320 546f 6f20 4d61 6e79 2048 6f70 483 Too Many Hop
09C0 736c 696e 666f 7074 696f 6e61 6c67 6f72 slinfoptionalgor
09D0 6974 686d 3d36 3034 2044 6f65 7320 4e6f ithm=604 Does No
09E0 7420 4578 6973 7420 416e 7977 6865 7265 t Exist Anywhere
09F0 7370 6f6e 7365 3d0d 0a0d 0a52 6571 7565 sponse=....Reque
0A00 7374 2d44 6973 706f 7369 7469 6f6e 3a20 st-Disposition:
0A10 4d44 3538 3020 5072 6563 6f6e 6469 7469 MD580 Preconditi
0A20 6f6e 2046 6169 6c75 7265 706c 6163 6573 on Failureplaces
0A30 3432 3220 5365 7373 696f 6e20 496e 7465 422 Session Inte
0A40 7276 616c 2054 6f6f 2053 6d61 6c6c 6f63 rval Too Smalloc
0A50 616c 3138 3120 4361 6c6c 2049 7320 4265 al181 Call Is Be
0A60 696e 6720 466f 7277 6172 6465 646f 6d61 ing Forwardedoma
0A70 696e 3d66 6169 6c75 7265 6e64 6572 6561 in=failurenderea
0A80 6c6d 3d53 5542 5343 5249 4245 2069 7073 lm=SUBSCRIBE ips
Garcia et al. [Page 9]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
0A90 6563 2d6d 616e 6461 746f 7279 7072 6563 ec-mandatoryprec
0AA0 6f6e 6469 7469 6f6e 6f72 6d61 6c34 3133 onditionormal413
0AB0 2052 6571 7565 7374 2045 6e74 6974 7920 Request Entity
0AC0 546f 6f20 4c61 7267 6532 6534 3836 2042 Too Large2e486 B
0AD0 7573 7920 4865 7265 6d6f 7465 726d 696e usy Heremotermin
0AE0 6174 6564 3138 3320 5365 7373 696f 6e20 ated183 Session
0AF0 5072 6f67 7265 7373 6374 700d 0a43 6f6e Progressctp..Con
0B00 7465 6e74 2d4c 656e 6774 683a 204f 6374 tent-Length: Oct
0B10 2041 4b41 7631 2d4d 4435 2d73 6573 7369 AKAv1-MD5-sessi
0B20 6f6e 6f6e 650d 0a41 7574 686f 7269 7a61 onone..Authoriza
0B30 7469 6f6e 3a20 3630 3320 4465 636c 696e tion: 603 Declin
0B40 6578 746e 6f6e 6365 3d34 3835 2041 6d62 extnonce=485 Amb
0B50 6967 756f 7573 6572 6e61 6d65 3d61 7564 iguousername=aud
0B60 696f 0d0a 436f 6e74 656e 742d 5479 7065 io..Content-Type
0B70 3a20 4d61 7220 3430 3120 556e 6175 7468 : Mar 401 Unauth
0B80 6f72 697a 6564 0d0a 5265 7175 6972 653a orized..Require:
0B90 2053 4354 5052 4143 4b20 0d0a 743d 3020 SCTPRACK ..t=0
0BA0 302e 302e 302e 300d 0a53 6572 7665 723a 0.0.0.0..Server:
0BB0 2052 4547 4953 5445 5220 0d0a 633d 494e REGISTER ..c=IN
0BC0 2049 5036 2031 3830 2052 696e 6769 6e67 IP6 180 Ringing
0BD0 3130 3020 5472 7969 6e67 763d 300d 0a6f 100 Tryingv=0..o
0BE0 3d4e 4f54 4946 5920 5550 4441 5445 200d =NOTIFY UPDATE .
0BF0 0a53 7570 706f 7274 6564 3a20 756e 6b6e .Supported: unkn
0C00 6f77 6e41 4d52 5450 2f41 5650 200d 0a50 ownAMRTP/AVP ..P
0C10 7269 7661 6379 3a20 0d0a 4578 7069 7265 rivacy: ..Expire
0C20 733a 200d 0a53 6563 7572 6974 792d 0d0a s: ..Security-..
0C30 613d 7274 706d 6170 3a0d 0a6d 3d76 6964 a=rtpmap:..m=vid
0C40 656f 200d 0a6d 3d61 7564 696f 200d 0a73 eo ..m=audio ..s
0C50 3d20 6661 6c73 650d 0a52 6f75 7465 3a20 = false..Route:
0C60 3b65 7870 6972 6573 3d0d 0a61 3d63 7572 ;expires=..a=cur
0C70 723a 0d0a 613d 666d 7470 3a0d 0a61 3d63 r:..a=fmtp:..a=c
0C80 6f6e 663a 0d0a 5241 636b 3a20 0d0a 613d onf:..RAck: ..a=
0C90 6465 733a 0d0a 5253 6571 3a20 436c 6965 des:..RSeq: Clie
0CA0 6e74 3a20 5665 7269 6679 3a20 4259 4520 nt: Verify: BYE
0CB0 636e 6f6e 6365 3d31 3030 7265 6c75 7269 cnonce=100reluri
0CC0 3d71 6f70 3d71 6f73 5443 5055 4450 786d =qop=qosTCPUDPxm
0CD0 6c3b 6c72 0d0a 5669 613a 2053 4950 2f32 l;lr..Via: SIP/2
0CE0 2e30 2f54 4350 2034 3038 2052 6571 7565 .0/TCP 408 Reque
0CF0 7374 2054 696d 656f 7574 696d 6572 7073 st Timeoutimerps
0D00 6970 3a0d 0a56 6961 3a20 5349 502f 322e ip:..Via: SIP/2.
0D10 302f 5544 5020 3b63 6f6d 703d 7369 6763 0/UDP ;comp=sigc
0D20 6f6d 7072 6f62 6174 696f 6e61 636b 3b62 omprobationack;b
0D30 7261 6e63 683d 7a39 6847 3462 4b0d 0a4d ranch=z9hG4bK..M
0D40 6178 2d46 6f72 7761 7264 733a 2041 7072 ax-Forwards: Apr
0D50 2049 4e56 4954 4520 0d0a 4361 6c6c 2d49 INVITE ..Call-I
0D60 443a 200d 0a43 6f6e 7461 6374 3a20 3230 D: ..Contact: 20
0D70 3020 4f4b 0d0a 4672 6f6d 3a20 0d0a 4353 0 OK..From: ..CS
0D80 6571 3a20 0d0a 546f 3a20 3b74 6167 3d04 eq: ..To: ;tag=.
0D90 10ff 0811 7c0b 1158 0710 db0c 110a 0710 ....|..X........
0DA0 d406 1151 0711 510b 1163 0511 8a06 1184 ...Q..Q..c......
0DB0 0f11 2e0d 1116 0611 6e08 1174 1311 0310 ........n..t....
Garcia et al. [Page 10]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
0DC0 113d 080d c504 0f21 030e c803 0f96 040f .=.....!........
0DD0 9604 10bd 0410 c103 10ac 0410 ac07 10b0 ................
0DE0 030d ad08 0fb1 090f b109 0dee 0a0f 3f09 ..............?.
0DF0 0e83 0a0e 8306 0fe1 070f e105 0f94 060f ................
0E00 9406 0fe8 070f e808 0d83 060e 7d07 0e6c ............}..l
0E10 060f 4303 10cb 0910 7203 10c8 0a0d cb05 ..C.....r.......
0E20 0e4d 060e d603 0e10 110f 2504 0cf9 080f .M........%.....
0E30 1704 0953 030a 4704 0f11 120e fb10 0f62 ...S..G........b
0E40 090f 1108 0d56 0310 030b 1018 0310 ce06 .....V..........
0E50 10b7 0c0e 9c0b 100d 0a0f d004 104d 0510 .............M..
0E60 4d08 1084 070f da09 1060 0b10 2e07 0f9a M........`......
0E70 0b0f 8609 1057 0810 940b 1023 0810 9c08 .....W.....#....
0E80 0fa9 0810 a404 0f9a 0d0f ef08 0dc5 100f ................
0E90 760b 0fba 140d 371b 0d37 040d f714 0ee4 v.....7..7......
0EA0 0b0f c50b 0734 0f0d 6d04 0f21 0310 d107 .....4..m..!....
0EB0 0d4b 090f 5409 1069 0810 8c09 107b 0a10 .K..T..i.....{..
0EC0 430a 1039 0810 0503 10c5 090e 9305 0cc8 C..9............
0ED0 040c d90c 10db 090d 1610 0c7a 0c0c a204 ...........z....
0EE0 0d7b 0c0c f50c 0ce9 070b dc0b 0d01 130b .{..............
0EF0 eb08 0d1f 0c0c dd13 10d4 0a0d 0c0d 0ecb ................
0F00 030d 3403 0d31 1b0c 0409 0cb7 090c ae11 ..4..1..........
0F10 0c65 0c0c 2c0c 0d52 130c 3810 0c8e 160c .e..,..R..8.....
0F20 4b06 0d27 0504 f209 0cc0 050b e604 0d2d K..'...........-
0F30 0f09 7e06 0b70 090c 4204 0aed 0c0a 2b08 ..~..p..B.....+.
0F40 0b42 0e09 cf0f 0f27 090f 880c 0a1f 0f09 .B.....'........
0F50 8d0c 0a4f 170d f90f 07a8 0a0f a70f 08d6 ...O............
0F60 0e09 b30b 0a82 030b e303 08c1 040e f703 ................
0F70 08d3 0204 8d08 0b52 050b 9407 0b69 0605 .......R.....i..
0F80 4804 07f4 0510 5204 071e 0807 1e05 0b99 H.....R.........
0F90 1004 ca09 0a79 090e 8d05 0498 050b 760b .....y........v.
0FA0 049b 0f04 9b07 049b 0304 a307 04a3 1007 ................
0FB0 8309 0783 050b 7b05 0b80 050b 8505 07b9 ......{.........
0FC0 050b 8a05 0b8f 050b 2505 08e4 050c 8905 ........%.......
0FD0 0f71 0511 4c05 0878 0508 9d05 0c9d 0507 .q..L..x........
0FE0 3f05 0c75 050f 0c05 0c60 0506 a904 07b6 ?..u.....`......
0FF0 0905 8c06 061a 060e a70a 0616 0a0a c207 ................
1000 0b62 0a0a ae03 0b23 040f 9106 0ca8 0705 .b.....#........
1010 ad0a 0eda 080b 4a0d 09ff 0b05 1c09 1122 ......J........"
1020 0805 c907 0d9d 060b d70a 064d 040b ae06 ...........M....
1030 068d 0806 0208 0e28 0b0a a303 0a0c 030b .......(........
1040 ba05 10f9 0409 9c05 0aea 030b bd06 0d7e ...............~
1050 040d 2808 08b7 1b0e 520a 09a9 1404 8515 ..(.....R.......
1060 0759 1507 440d 0930 1706 ae0f 07e6 1407 .Y..D..0........
1070 be0d 060a 0d09 3d16 06dc 1208 4521 04aa ......=.....E!..
1080 1310 e708 0a17 1c0e ad18 0bc0 1a05 951a ................
1090 0575 1106 3d16 06f2 1e0e 3016 05ed 1d06 .u..=.....0.....
10A0 2023 0527 1108 7d11 0db0 1604 da0d 0f49 #.'..}........I
10B0 1607 0817 05b4 0d08 c713 07f8 1208 571f ..............W.
10C0 04fe 1905 4e13 080b 0f08 e917 06c5 1306 ....N...........
10D0 7b19 05d4 1507 6e18 0e12 0b0f 361b 0dd5 {.....n.....6...
10E0 1208 3315 0793 040b 9e04 0ba6 040b aa04 ..3.............
Garcia et al. [Page 11]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
10F0 0bb6 040b a20a 0ab8 0b0a 9808 0b3a 0b09 .............:..
1100 7308 0b32 0b0a 8d09 0af6 0a0a e00d 09f2 s..2............
1110 130d 8b14 07d2 1309 0b12 081e 1009 5b12 ..............[.
1120 091e 0d0c cd0e 0c1f 1109 4a0c 0a5b 0c0a ..........J..[..
1130 4309 0aff 0e09 dd0c 0a37 0706 6908 0669 C........7..i..i
1140 0609 eb08 0b5a 0a0a d612 0657 0d06 5707 .....Z.....W..W.
1150 09eb 040a f110 0730 090b 080c 0a67 050a .......0.....g..
1160 f105 0a73 060a 7307 096b 0809 6b03 0be3 ...s..s..k..k...
1170 070f a00a 0acc 090b 1a0a 099f 0a06 7107 ..............q.
1180 0e73 070f fc0e 09c1 1706 930a 0efb 0d0e .s..............
1190 030a 099f 0a06 7108 0b2a 0c0d 6109 0b11 ......q..*..a...
11A0 1308 f815 08a2 040b b20f 0566 0d07 2309 ...........f..#.
11B0 0a0e 0b0d 610f 04ee 0604 f804 092b 0408 ....a........+..
11C0 2f07 08c0 0311 2b04 112a 070d a303 0734 /.....+..*.....4
11D0 0410 fd03 0736 030d c00d 042d 0b04 460c .....6.....-..F.
11E0 043a 040b c004 0c2c 0405 9504 047c 0405 .:.....,.....|..
11F0 7504 0485 0409 7304 063d 0604 7b04 06f2 u.....s..=..{...
1200 0407 5904 0e30 1204 0010 088e 1008 690e ..Y..0........i.
1210 0412 0d04 2003 10db 0405 ed04 0744 0406 .... ........D..
1220 2007 0474 040c 040a 045c 0405 2704 0930 ..t.....\..'..0
1230 0408 7d04 0fd0 040d b004 06ae 0404 da09 ..}.............
1240 0409 0811 2e04 0f49 0407 e604 0ecb 0508 .......I........
1250 bd04 0708 040f c504 0657 0405 b404 0f76 .........W.....v
1260 0408 c708 0bfc 0407 f804 0730 0407 be04 ...........0....
1270 0857 050d 5d04 04fe 0406 0a04 054e 040e .W..]........N..
1280 5204 080b 0409 3d04 08e9 0505 d104 06c5 R.....=.........
1290 0406 dc04 067b 0409 a904 05d4 0408 4504 .....{........E.
12A0 076e 040b e504 0e12 0404 aa04 0beb 070f .n..............
12B0 1b04 0f36 040e e404 0dd5 0410 e704 0833 ...6...........3
12C0 050f 5d04 0793 040a 1706 0e78 0404 8104 ..]........x....
12D0 0dc2 040d aa04 116e 040e ad05 0466 0904 .......n.....f..
12E0 6b0b 0451 040d 01 k..Q...
Table 1: binary representation of the static SIP/SDP
dictionary for SigComp
4. Security Considerations
The security considerations of [1] apply. This memo does not
introduce any known additional security risk.
5. IANA Considerations
None.
6. Authors' Addresses
Miguel A. Garcia
Ericsson
FIN-02420, Jorvas, Finland
Tel: +358 9299 3553
Garcia et al. [Page 12]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
e-mail: miguel.a.garcia@ericsson.com
Carsten Bormann
Universitaet Bremen TZI
Postfach 330440
D-28334 Bremen, Germany
Tel: +49 421 218 7024
e-mail: cabo@tzi.org
Joerg Ott
Universitaet Bremen TZI
Bibliothekstr. 1
Bremen 28359, Germany
Tel: +49.421.201-7028
e-mail: jo@tzi.uni-bremen.de
Richard Price
Roke Manor Research Ltd
Romsey, Hants, SO51 0ZN, United Kingdom
Tel: +44 1794 833681
e-mail: richard.price@roke.co.uk
Adam Roach
dynamicsoft
5100 Tennyson Parkway, Suite 1200
Plano, TX 75024, USA
e-mail: adam@dynamicsoft.com
7. Acknowledgements
The authors would like to thank Lars-Erik Jonsson, Zhigang C. Liu and
Jonathan Rosenberg for their valuable comments.
8. References
8.1 Normative references
1. R. Price, H. Hannu, C. Bormann, J. Christoffersson, Z. Liu, J.
Rosenberg, Signaling Compression (SigComp), draft-ietf-rohc-
sigcomp-07.txt, June 2002, work in progress.
8.2 Informative references
2. J. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J.
Peterson, R. Sparks, M. Handley, E. Schooler, Session Initiation
Protocol, Request for Comments 3261, May 2002.
3. M. Garcia et al, 3GPP requirements on SIP, draft-sipping-
garcia-3gpp-reqs-03.txt, work in progress.
Garcia et al. [Page 13]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
4. F. Yergeau, "UTF-8, a transformation format of ISO 10646," Request
for Comments 2279, Internet Engineering Task Force, Jan. 1998.
5. J. Franks, P. Hallam-Baker, J. Hostetler, S. Lawrence, P. Leach,
A. Luotonen, L. Stewart, HTTP Authentication: Basic and Digest
Access Authentication, Request for Comments 2617, June 1999.
6. A. Vaha-Sipila, URLs for telephone calls, Request for Comments
2806, Internet Engineering Task Force, Apr. 2000.
7. S. Donovan, The SIP INFO Method, Request for Comments 2976,
October 2000.
8. A. Roach, SIP-Specific Event Notification, Request for Comments
3265, May 2002.
9. J. Rosenberg, H. Schulzrinne, Reliability of Provisional Responses
in SIP, Request for Comments 3262, May 2002.
10. J. Rosenberg, The Session Initiation Protocol UPDATE Method,
draft-ietf-sip-update-02.txt, April 2002, work in progress.
11. G. Camarillo, W. Marshall, J. Rosenberg, Integration of Resource
Management and SIP, draft-ietf-sip-manyfolks-resource-07.txt,
April 2002, work in progress.
12. R. Sparks, The SIP Refer Method, draft-ietf-sip-refer-06.txt,
July 2002, work in progress.
13. R. Mahy, B. Biggs, R. Dean, The SIP Replaces header, draft-ietf-
sip-replaces-02.txt, April 2002, work in progress.
14. R. Sparks, Internet Media Types message/sip and message/sipfrag,
draft-sparks-sip-mimetypes-03.txt, April 2002, work in progress.
15. D. Willis, B. Hoeneisen, Sesssion Initiation Protocol Extension
Header for Registration of Non-Adjacent Contacts, draft-willis-
sip-path-08.txt, May 2002, work in progress.
16. H. Schulzrinne, D. Oran, G. Camarillo, The Reason Header Field
for the Session Initiation Protocol, draft-ietf-sip-reason-01.txt,
May 2002, work in progress.
17. S. Donovan, J. Rosenberg, The SIP Session Timer, draft-ietf-sip-
session-timer-09.txt, July 2002, work in progress.
18. A. Niemi, J. Arkko, V. Torvinen, HTTP Digest Authentication Using
AKA, draft-ietf-sip-digest-aka-03, May 2002, work in progress.
19. J. Arkko, V. Torvinen, G. Camarillo, T. Haukka, S. Sen, Security
Mechanism Agreement for SIP Sessions, draft-ietf-sip-sec-
Garcia et al. [Page 14]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
agree-04.txt, June 2002, working progress.
20. B. Campbell, J. Rosenberg, H. Schulzrinne, C. Huitema, D. Gurle,
D. Oran, Session Initiation Protocol Extension for Instant
Messaging, draft-ietf-sip-message-06.txt, July 2002, work in
progress.
21. void
22. H. Schulzrinne, J. Rosenberg, Session Initiation Protocol (SIP)
Caller Preferences and Callee Capabilities, draft-ietf-sip-
callerprefs-06.txt, July 2002, work in progress.
23. G. Camarillo, Compressing the Session Initiation Protocol, draft-
ietf-sip-compression-00.txt, August 2002, work in progress.
24. M. Handley, V. Jacobson, C. Perkins, SDP: Session Description
Protocol, draft-ietf-mmusic-sdp-new-10.txt, May 2002, work in
progress.
25. J Sjoberg, M. Westerlund, A. Lakaniemi, Q. Xie, Real-Time
Protocol payload format and file storage format for the Adaptive
Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) audio
codecs, RFC 3267, June 2002
26. G. Camarillo, J. Holler, G. AP Eriksson, H. Schulzrinne, Grouping
of media lines in SDP, draft-ietf-mmusic-fid-06.txt, February
2002, work in progress.
27. H. Schulzrinne, S. Petrack, RTP Payload for DTMF Digits,
Telephony Tones and Telephony Signals, RFC 2833, May 2000.
28. J. Arkko, E. Carrara, F. Lindholm, M. Naslund, K. Norrman, Key
Management Extensions for SDP and RTSP, draft-ietf-mmusic-kmgmt-
ext-05.txt, June 2002, work in progress.
29. J. Arkko, E. Carrara, F. Lindholm, M. Naslund, K. Norrman, MIKEY:
Multimedia Internet KEYing, draft-ietf-msec-mikey-03.txt, July
2002.
30. M. Baugher, R. Blom, E. Carrara, D. McGrew, M. Naslund, K.
Norrman, D. Oran, The Secure Real Time Transport Protocol, draft-
ietf-avt-srtp-05.txt, June 2002, work in progress.
31. J. Ott, S. Wenger, S. Fukunaga, N. Sato, K. Yano, A. Miyazaki, K.
Hata, R. Hakenberg, C. Burmeister, Extended RTP Profile for RTCP-
based feedback (RTP/AVPF), draft-ietf-avt-rtcp-feedback-03.txt,
March 2002, work in progress.
32. J. Rosenberg, H.Schulzrinne, An Offer/Answer Model with SDP, RFC
3264.
Garcia et al. [Page 15]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
33. void
34. J. Peterson, A Privacy Mechanism for the Session Initiation
Protocol (SIP), draft-ietf-sip-privacy-general-01.txt, June 2002,
work in progress.
35. R. Sparks, The Referred-By mechanism,draft-ietf-sip-
referredby-00.txt, May 2002, work in progress.
36. D. Willis, B. Hoeneisen, Session Initiation Protocol Extension
Header Field for Service Route Discovery During Registration,
August 2002, draft-ietf-sip-scvrtdisco-01.txt, work in progress.
Garcia et al. [Page 16]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
Appendix A. SIP input strings to the SIP/SDP static dictionary
For reference, this section lists the SIP input strings that were
used in generating the dictionary, as well as a priority value, the
offset of the string in the generated dictionary, the length of the
string, and one or more references into the referenced documents that
motivate the presence of this string. Note that the notation
"[CRLF]" stands for a sequence of two bytes with the values 0x0d and
0x0a, respectively.
The priority value is used for determining the position of the string
in the dictionary. Lower priority values (higher priorities) cause
the string to occur at a later position in the dictionary, making it
more efficient to reference the string in certain compression
algorithms. Hence, small priority values were assigned to strings
more likely to occur.
String Pr Off Len References
===================================== == ==== ==== ==========
"sip:" 1 0CFF 0004 [2] 19.1.1
"sips:" 3 08C8 0005 [2] 19.1.1
"tel:" 3 08D9 0004 [6] 2.2
"SIP/2.0" 1 0CDB 0007 [2] 25.1
"SIP/2.0/UDP " 1 0D0A 000C [2] 25.1
"SIP/2.0/TCP " 3 0CDB 000C [2] 25.1
"INVITE" 1 0D51 0006 [2] 25.1
"INVITE " 1 0D51 0007 [2] 25.1
"ACK" 2 0B96 0003 [2] 25.1
"ACK " 2 0B96 0004 [2] 25.1
"OPTIONS" 4 0269 0007 [2] 25.1
"OPTIONS " 4 0269 0008 [2] 25.1
"BYE" 2 0CAC 0003 [2] 25.1
"BYE " 2 0CAC 0004 [2] 25.1
"CANCEL" 4 05EB 0006 [2] 25.1
"CANCEL " 4 05EB 0007 [2] 25.1
"REGISTER" 2 0BB1 0008 [2] 25.1
"REGISTER " 2 0BB1 0009 [2] 25.1
"INFO" 4 06F1 0004 [7] 2
"INFO " 4 06F1 0005 [7] 2
"SUBSCRIBE" 2 0A83 0009 [8] 8.1.1
"SUBSCRIBE " 2 0A83 000A [8] 8.1.1
"NOTIFY" 2 0BE1 0006 [8] 8.1.2
"NOTIFY " 2 0BE1 0007 [8] 8.1.2
"PRACK" 2 0B94 0005 [9] 6
"PRACK " 2 0B94 0006 [9] 6
"UPDATE" 2 0BE8 0006 [10] 7, 10
"UPDATE " 2 0BE8 0007 [10] 7, 10
"REFER" 4 0673 0005 [12] 2.1, 7
"REFER " 4 0673 0006 [12] 2.1, 7
"MESSAGE" 4 056B 0007 [20] 9
"MESSAGE " 4 056B 0008 [20] 9
Garcia et al. [Page 17]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"[CRLF]Accept: " 4 06CC 000A [2] 20.1
"[CRLF]Accept-" 4 071A 0009 [22] 5,
[2] 20.2, 20.3
"Contact: " 5 0009 0009 [22] 5
"Encoding: " 4 059F 000A [2] 20.2,
[2] 20.12
"Language: " 4 0271 000A [2] 20.3,
[2] 20.13
"[CRLF]Alert-Info: " 4 05C1 000E [2] 20.4
"[CRLF]Allow: " 3 0916 0009 [2] 20.5
"[CRLF]Allow-Events: " 3 087A 0010 [8] 8.2.1
"[CRLF]Authentication-Info: " 4 0293 0017 [2] 20.6
"[CRLF]Authorization: " 2 0B25 0011 [2] 20.7
"[CRLF]Call-ID: " 1 0D58 000B [2] 20.8
"[CRLF]Call-Info: " 5 0020 000D [2] 20.9
"[CRLF]Contact: " 1 0D63 000B [2] 20.10
"[CRLF]Content-" 4 0AFB 000A [2] 20.11,
20.12, 20.13, [2] 20.14, 20.15
"Disposition: " 4 0A03 000D [2] 20.11
"Encoding: " 4 059F 000A [2] 20.2,
[2] 20.12
"Language: " 4 0271 000A [2] 20.3,
[2] 20.13
"[CRLF]Content-Length: " 2 0AFB 0012 [2] 20.14
"[CRLF]Content-Type: " 2 0B62 0010 [2] 20.15
"[CRLF]CSeq: " 1 0D7C 0008 [2] 20.16
"[CRLF]Date: " 4 072A 0008 [2] 20.17
"[CRLF]Error-Info: " 5 0012 000E [2] 20.18
"[CRLF]Event: " 3 08E9 000C [8] 8.2.1
"[CRLF]Expires: " 2 0C18 000B [2] 20.19
"[CRLF]From: " 1 0D74 0008 [2] 20.20
"[CRLF]In-Reply-To: " 4 057E 000F [2] 20.21
"[CRLF]Max-Forwards: " 1 0D3D 0010 [2] 20.22
"[CRLF]Min-" 4 0770 0006 [2] 20.23,
[17] 5
"Expires: " 4 0842 0009 [2] 20.23
"SE: " 4 06ED 0004 [17] 5
"[CRLF]MIME-Version: " 5 0469 0010 [2] 20.24
"[CRLF]Organization: " 5 048E 0010 [2] 20.25
"[CRLF]Path: " 3 091F 0008 [15] 3
"[CRLF]Priority: " 4 062B 000C [2] 20.26
"[CRLF]Privacy: " 2 0C0D 000B [34] 4.2
"[CRLF]Proxy-" 4 0742 0008 [2] 20.27,
20.28, 20.29
"Authenticate: " 4 05CF 000E [2] 20.27
"Authorization: " 4 0B27 000F [2] 20.28
"Require: " 4 0B88 0009 [2] 20.29
"[CRLF]RAck: " 2 0C84 0008 [9] 7.2
"[CRLF]Reason: " 3 090C 000A [16] 2
"[CRLF]Record-Route: " 3 088E 0010 [2] 20.30
"[CRLF]Refer-To: " 4 061F 000C [12] 2.1, 7
Garcia et al. [Page 18]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"[CRLF]Referred-By: " 4 058D 000F [35] 9
"[CRLF]Reject-Contact: " 5 0000 0012 [22] 5
"[CRLF]Replaces: " 4 064F 000C [13] 3.1
"[CRLF]Reply-To: " 5 003A 000C [2] 20.31
"[CRLF]Request-Disposition: " 4 09F9 0017 [22] 5
"[CRLF]Require: " 2 0B86 000B [2] 20.32
"[CRLF]Retry-After: " 4 03A8 000F [2] 20.33
"[CRLF]Route: " 2 0C57 0009 [2] 20.34
"[CRLF]RSeq: " 2 0C94 0008 [9] 7.1
"[CRLF]Security-" 2 0C23 000B [19] 3.3
"Client: " 2 0C9C 0008 [19] 3.3
"Server: " 2 0BA9 0008 [19] 3.3
"Verify: " 2 0CA4 0008 [19] 3.3
"[CRLF]Server: " 4 0BA7 000A [2] 20.35
"[CRLF]Service-Route: " 3 0865 0011 [36]
"[CRLF]Session-Expires: " 3 0838 0013 [17] 4
"[CRLF]Subject: " 5 0046 000B [2] 20.36
"[CRLF]Subscription-State: " 3 084B 0016 [8] 8.2.3
"[CRLF]Supported: " 2 0BEF 000D [2] 20.37
"[CRLF]Timestamp: " 5 002D 000D [2] 20.38
"[CRLF]To: " 1 0D84 0006 [2] 20.39
"[CRLF]Unsupported: " 4 04D6 000F [2] 20.40
"[CRLF]User-Agent: " 4 05B3 000E [2] 20.41
"[CRLF]Via: " 1 0CD4 0007 [2] 20.42
"[CRLF]Via: SIP/2.0/UDP " 1 0D03 0013 [2] 20.42
"[CRLF]Via: SIP/2.0/TCP " 3 0CD4 0013 [2] 20.42
"[CRLF]Warning: " 5 0051 000B [2] 20.43
"[CRLF]WWW-Authenticate: " 2 0937 0014 [2] 20.44
"[CRLF]WWW-Authenticate: Digest " 2 0937 001B [2] 20.44
"[CRLF][CRLF]" 2 09F7 0004 [2] 7
";transport=" 4 0682 000B [2] 25.1
"udp" 4 07E3 0003 [2] 25.1,
[24] A, [2] 25.1, [24] A
"tcp" 4 04C1 0003 [2] 25.1
"sctp" 4 0AF7 0004 [2] 25.1
"tls" 4 04D3 0003 [2] 25.1,
[19] 3.3
";user=" 3 0927 0006 [2] 25.1
"phone" 3 00F2 0005 [2] 25.1
"ip" 4 008D 0002 [2] 25.1
";method=" 4 0752 0008 [2] 25.1
";ttl=" 4 0794 0005 [2] 25.1
";lr" 2 0CD1 0003 [2] 25.1
"Digest " 2 094B 0007 [5] 3.2.1,
3.2.2
"username=" 2 0B54 0009 [5] 3.2.2
"uri=" 2 0CBD 0004 [5] 3.2.2
"qop=" 2 0CC1 0004 [5] 3.2.1,
3.2.2
"cnonce=" 2 0CB0 0007 [5] 3.2.2
"nc=" 2 09AD 0003 [5] 3.2.2
Garcia et al. [Page 19]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"response=" 2 09EE 0009 [5] 3.2.2
"nextnonce=" 2 0B3F 000A [5] 3.2.3
"rspauth=" 2 0983 0008 [5] 3.2.3
"realm=" 2 0A7D 0006 [5] 3.2.1
"domain=" 2 0A6C 0007 [5] 3.2.1
"nonce=" 2 0B43 0006 [5] 3.2.1
"opaque=" 4 0769 0007 [5] 3.2.1
"stale=" 4 0148 0006 [5] 3.2.1
"true" 4 03F4 0004 [5] 3.2.1
"false" 4 0C52 0005 [5] 3.2.1
"algorithm=" 2 09CB 000A [5] 3.2.1,
[18] 3.1
"MD5" 2 0A10 0003 [5] 3.2.1,
[18] 3.1
"MD5-sess" 2 0B17 0008 [5] 3.2.1,
[18] 3.1
"auth" 4 031E 0004 [5] 3.2.1
"auth-int" 4 031E 0008 [5] 3.2.1
"AKAv" 2 0B11 0004 [18] 3.1, 6
"AKAv1-MD5" 2 0B11 0009 [18] 3.1, 6
"auts=" 4 0799 0005 [18] 3.4
"digest-integrity" 4 00CA 0010 [19] 3.3
"ipsec-ike" 4 0679 0009 [19] 3.3
"ipsec-man" 4 0A8D 0009 [19] 3.3
"smime" 4 0098 0005 [19] 3.3
";alg=" 4 0776 0005 [19] 3.3
";purpose=" 5 006B 0009 [2] 20.9
"icon" 5 09AA 0004 [2] 20.9, 20.11
"info" 5 09C2 0004 [2] 20.9
"card" 5 0081 0004 [2] 20.9
";expires=" 2 0C60 0009 [2] 25.1,
[8] 8.4
"render" 5 0A78 0006 [2] 20.11
"session" 5 0B1B 0007 [2] 20.11,
[34] 4.2
"alert" 5 04BD 0005 [2] 20.11
";handling=" 5 005C 000A [2] 20.11
"optional" 2 09C5 0008 [2] 20.11,
[11] 4, [2] 20.11, [11] 4
"required" 5 07FC 0008 [2] 20.11
"text" 5 007C 0004 [2] 25.1
"image" 5 0066 0005 [2] 25.1
"audio" 5 0B5D 0005 [2] 25.1
"video" 5 095D 0005 [2] 25.1
"application" 2 0334 000B [2] 25.1
"application/sdp" 2 096D 000F [2] 25.1
"message/sip" 4 009B 000B [2] 27.5
"message/sipfrag" 4 009B 000F [14] 2
"message" 4 009B 0007 [2] 27.5,
[14] 2
"sip" 4 00A3 0003 [2] 27.5
Garcia et al. [Page 20]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"sipfrag" 4 00A3 0007 [14] 2
"multipart/signed" 4 0383 0010 [2] 23.3
"multipart" 4 0383 0009 [2] 25.1, 7.4.1
"sdp" 2 0647 0003
"xml" 2 0CCE 0003
"Mon, " 4 077B 0005 [2] 25.1
"Tue, " 4 0780 0005 [2] 25.1
"Wed, " 4 0785 0005 [2] 25.1
"Thu, " 4 03B9 0005 [2] 25.1
"Fri, " 4 078A 0005 [2] 25.1
"Sat, " 4 078F 0005 [2] 25.1
"Sun, " 4 0725 0005 [2] 25.1
" Jan " 4 04E4 0005 [2] 25.1
" Feb " 4 0889 0005 [2] 25.1
" Mar " 4 0B71 0005 [2] 25.1
" Apr " 4 0D4C 0005 [2] 25.1
" May " 4 0478 0005 [2] 25.1
" Jun " 4 049D 0005 [2] 25.1
" Jul " 4 089D 0005 [2] 25.1
" Aug " 4 033F 0005 [2] 25.1
" Sep " 4 0875 0005 [2] 25.1
" Oct " 4 0B0C 0005 [2] 25.1
" Nov " 4 0860 0005 [2] 25.1
" Dec " 4 02A9 0005 [2] 25.1
" GMT" 4 03B6 0004 [2] 25.1
";tag=" 1 0D8A 0005 [2] 25.1
"emergency" 4 018C 0009 [2] 20.26
"urgent" 4 021A 0006 [2] 20.26
"normal" 4 0AA7 0006 [2] 20.26
"non-urgent" 4 0216 000A [2] 20.26
";duration=" 4 06C2 000A [2] 20.33
";maddr=" 4 0762 0007 [2] 20.42
";received=" 4 06AE 000A [2] 20.42
";branch=" 5 0D2E 0008 [2] 20.42
";branch=z9hG4bK" 1 0D2E 000F [2] 8.1.1.7
"SIP" 5 0CDB 0003 [2] 25.1,
[16] 2
"UDP" 2 0CCB 0003 [2] 20.42
"TCP" 2 0CC8 0003 [2] 20.42
"TLS" 4 0723 0003 [2] 20.42
"SCTP" 4 0B91 0004 [2] 20.42
"active" 4 08A8 0006 [8] 8.4
"pending" 4 01AD 0007 [8] 8.4
"terminated" 4 0ADA 000A [8] 8.4
";reason=" 4 074A 0008 [8] 8.4
";retry-after=" 4 05FF 000D [8] 8.4
"deactivated" 4 011C 000B [8] 8.4
"probation" 4 0D22 0009 [8] 8.4
"rejected" 4 01C9 0008 [8] 8.4
"timeout" 4 099D 0007 [8] 8.4
"giveup" 4 07D7 0006 [8] 8.4
Garcia et al. [Page 21]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"noresource" 4 024D 000A [8] 8.4
";id=" 4 07AE 0004 [8] 8.4
"100rel" 2 0CB7 0006 [9] 8.1
"precondition" 2 0A9C 000C [11] 8
"refer" 3 07E6 0005 [12] 3.1, 7
"to-tag" 4 028D 0006 [13] 3.2
"from-tag" 4 0202 0008 [13] 3.2
"replaces" 4 0A28 0008 [13] 3.4
"Q.850" 5 01D1 0005 [16] 2
";cause=" 5 0074 0007 [16] 2
";text=" 5 007B 0006 [16] 2
"path" 3 097B 0004 [15] 3
";refresher=" 4 06A3 000B [17] 4
"uac" 4 060C 0003 [17] 4
"uas" 4 07BA 0003 [17] 4
"timer" 4 0CF9 0005 [17] 7.1
"pref" 5 07E5 0004 [22] 4.1
"TRUE" 4 059C 0004 [22] 6.2
"FALSE" 4 06EA 0005 [22] 6.2
";q=" 4 07BD 0003 [2] 25.1,
[22] 6.2, [19] 3.3
";comp=sigcomp" 1 0D16 000D [23] 6
"privacy" 3 07DC 0007 [34] 4.2
"header" 4 097E 0006 [34] 4.2
"user" 4 0928 0004 [34] 4.2
"none" 2 0B21 0004 [34] 4.2,
[11] 4
"critical" 4 04B7 0008 [34] 4.2
"100 " 5 0BD0 0004 [2] 21.1.1
"100 Trying" 2 0BD0 000A [2] 21.1.1
"180 " 5 0BC5 0004 [2] 21.1.2
"180 Ringing" 2 0BC5 000B [2] 21.1.2
"181 " 5 0A52 0004 [2] 21.1.3
"181 Call Is Being Forwarded" 4 0A52 001B [2] 21.1.3
"182 " 5 05A9 0004 [2] 21.1.4
"182 Queued" 4 05A9 000A [2] 21.1.4
"183 " 5 0AE4 0004 [2] 21.1.5
"183 Session Progress" 2 0AE4 0014 [2] 21.1.5
"200 " 5 0D6E 0004 [2] 21.2.1
"200 OK" 1 0D6E 0006 [2] 21.2.1
"202 " 5 082C 0004 [8] 8.3.1
"202 Accepted" 3 082C 000C [8] 8.3.1
"300 " 5 0085 0004 [2] 21.3.1
"300 Multiple Choices" 4 0085 0014 [2] 21.3.1
"301 " 5 0359 0004 [2] 21.3.2
"301 Moved Permanently" 4 0359 0015 [2] 21.3.2
"302 " 5 0344 0004 [2] 21.3.3
"302 Moved Temporarily" 4 0344 0015 [2] 21.3.3
"305 " 5 0530 0004 [2] 21.3.4
"305 Use Proxy" 4 0530 000D [2] 21.3.4
"380 " 5 02AE 0004 [2] 21.3.5
Garcia et al. [Page 22]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"380 Alternative Service" 4 02AE 0017 [2] 21.3.5
"400 " 5 03E6 0004 [2] 21.4.1
"400 Bad Request" 4 03E6 000F [2] 21.4.1
"401 " 5 0B76 0004 [2] 21.4.2
"401 Unauthorized" 2 0B76 0010 [2] 21.4.2
"402 " 5 03BE 0004 [2] 21.4.3
"402 Payment Required" 4 03BE 0014 [2] 21.4.3
"403 " 5 020A 0004 [2] 21.4.4
"403 Forbidden" 4 020A 000D [2] 21.4.4
"404 " 5 053D 0004 [2] 21.4.5
"404 Not Found" 4 053D 000D [2] 21.4.5
"405 " 5 02DC 0004 [2] 21.4.6
"405 Method Not Allowed" 4 02DC 0016 [2] 21.4.6
"406 " 5 0445 0004 [2] 21.4.7
"406 Not Acceptable" 4 0445 0012 [2] 21.4.7
"407 " 5 00AA 0004 [2] 21.4.8
"407 Proxy Authentication Required" 4 00AA 0021 [2] 21.4.8
"408 " 5 0CE7 0004 [2] 21.4.9
"408 Request Timeout" 4 0CE7 0013 [2] 21.4.9
"410 " 5 0617 0004 [2] 21.4.10
"410 Gone" 4 0617 0008 [2] 21.4.10
"413 " 5 0AAD 0004 [2] 21.4.11
"413 Request Entity Too Large" 4 0AAD 001C [2] 21.4.11
"414 " 5 07C0 0004 [2] 21.4.12
"414 Request-URI Too Long" 4 07C0 0018 [2] 21.4.12
"415 " 5 0195 0004 [2] 21.4.13
"415 Unsupported Media Type" 4 0195 001A [2] 21.4.13
"416 " 5 0175 0004 [2] 21.4.14
"416 Unsupported URI Scheme" 4 0175 001A [2] 21.4.14
"420 " 5 023D 0004 [2] 21.4.15
"420 Bad Extension" 4 023D 0011 [2] 21.4.15
"421 " 5 02F2 0004 [2] 21.4.16
"421 Extension Required" 4 02F2 0016 [2] 21.4.16
"422 " 5 0A30 0004 [17] 6, 12.1
"422 Session Interval Too Small" 4 0A30 001E [17] 6, 12.2
"423 " 5 01ED 0004 [2] 21.4.17
"423 Interval Too Brief" 4 01ED 0016 [2] 21.4.17
"429 " 5 0220 0004 [35] 9
"429 Provide Referror Identity" 4 0220 001D [35] 9
"480 " 5 0804 0004 [2] 21.4.18
"480 Temporarily Unavailable" 3 0804 001B [2] 21.4.18
"481 " 5 0127 0004 [2] 21.4.19
"481 Call/Transaction Does Not Exist" 4 0127 0023 [2] 21.4.19
"482 " 5 047D 0004 [2] 21.4.20
"482 Loop Detected" 4 047D 0011 [2] 21.4.20
"483 " 5 09B0 0004 [2] 21.4.21
"483 Too Many Hops" 4 09B0 0011 [2] 21.4.21
"484 " 5 00DA 0004 [2] 21.4.22
"484 Address Incomplete" 4 00DA 0016 [2] 21.4.22
"485 " 5 0B49 0004 [2] 21.4.23
"485 Ambiguous" 4 0B49 000D [2] 21.4.23
Garcia et al. [Page 23]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"486 " 5 0ACB 0004 [2] 21.4.24
"486 Busy Here" 3 0ACB 000D [2] 21.4.24
"487 " 5 0308 0004 [2] 21.4.25
"487 Request Terminated" 4 0308 0016 [2] 21.4.25
"488 " 5 01B4 0004 [2] 21.4.26
"488 Not Acceptable Here" 4 01B4 0017 [2] 21.4.26
"489 " 5 04C7 0004 [8] 8.3.2
"489 Bad Event" 4 04C7 000D [8] 8.3.2
"491 " 5 03F8 0004 [2] 21.4.27
"491 Request Pending" 4 03F8 0013 [2] 21.4.27
"493 " 5 0457 0004 [2] 21.4.28
"493 Undecipherable" 4 0457 0012 [2] 21.4.28
"494 " 5 00FE 0004 [19] 3.3.1
"494 Security Agreement Required" 4 00FE 001F [19] 3.3.1
"500 " 5 014E 0004 [2] 21.5.1
"500 Server Internal Error" 4 014E 0019 [2] 21.5.1
"501 " 5 040B 0004 [2] 21.5.2
"501 Not Implemented" 4 040B 0013 [2] 21.5.2
"502 " 5 04E9 0004 [2] 21.5.3
"502 Bad Gateway" 4 04E9 000F [2] 21.5.3
"503 " 5 02C5 0004 [2] 21.5.4
"503 Service Unavailable" 4 02C5 0017 [2] 21.5.4
"504 " 5 027B 0004 [2] 21.5.5
"504 Server Time-out" 4 027B 0013 [2] 21.5.5
"505 " 5 01D4 0004 [2] 21.5.6
"505 Version Not Supported" 4 01D4 0019 [2] 21.5.6
"513 " 5 036E 0004 [2] 21.5.7
"513 Message Too Large" 4 036E 0015 [2] 21.5.7
"580 " 5 0A12 0004 [11] 8
"580 Precondition Failure" 4 0A12 0018 [11] 8
"600 " 5 07EB 0004 [2] 21.6.1
"600 Busy Everywhere" 3 07EB 0013 [2] 21.6.1
"603 " 5 0B36 0004 [2] 21.6.2
"603 Decline" 4 0B36 000B [2] 21.6.2
"604 " 5 09D5 0004 [2] 21.6.3
"604 Does Not Exist Anywhere" 4 09D5 001B [2] 21.6.3
"606 " 5 0433 0004 [2] 21.6.4
"606 Not Acceptable" 4 0433 0012 [2] 21.6.4
"687 " 5 0393 0004 [13] 3.5
"687 Dialog Terminated" 4 0393 0015 [13] 3.5
"Anonymous" 3 08C0 0009 [2] 8.1.1.3
Table A.1: SIP input strings for the SIP/SDP dictionary
Garcia et al. [Page 24]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
Appendix B. SDP input strings to the SIP/SDP static dictionary
For reference, this section lists the SDP input strings that were
used in generating the dictionary, as well as a priority value, the
offset of the string in the generated dictionary, the length of the
string, and one or more references into the referenced documents that
motivate the presence of this string. Note that the notation
"[CRLF]" stands for a sequence of two bytes with the values 0x0d and
0x0a, respectively.
The priority value is used for determining the position of the string
in the dictionary. Lower priority values (higher priorities) cause
the string to occur at a later position in the dictionary, making it
more efficient to reference the string in certain compression
algorithms. Hence, small priority values were assigned to strings
more likely to occur.
String Pr Off Len References
===================================== == ==== ==== ==========
"v=0[CRLF]o=" 2 0BDA 0007 [24] 6
"[CRLF]s=" 2 0C4D 0004 [24] 6
"[CRLF]s= " 2 0C4D 0005 [32] 5
"[CRLF]i=" 4 079E 0004 [24] 6
"[CRLF]u=" 4 07A6 0004 [24] 6
"[CRLF]e=" 4 07AA 0004 [24] 6
"[CRLF]c=IN IP4 " 3 0901 000B [24] 6
"[CRLF]c=IN IP6 " 2 0BBA 000B [24] 6
"[CRLF]c=" 5 0901 0004 [24] 6
"[CRLF]b=" 3 092D 0004 [24] 6
"[CRLF]t=" 2 0B9A 0004 [24] 6
"[CRLF]t=0 0" 2 0B9A 0007 [32] 5
"[CRLF]r=" 4 07B6 0004 [24] 6
"[CRLF]z=" 4 07A2 0004 [24] 6
"[CRLF]k=clear:" 4 06B8 000A [24] 6
"[CRLF]k=base64:" 4 0698 000B [24] 6
"[CRLF]k=uri:" 4 073A 0008 [24] 6
"[CRLF]k=prompt:" 4 0573 000B [24] 6
"[CRLF]k=" 5 0573 0004 [24] 6
"[CRLF]a=cat:" 4 0732 0008 [24] 6
"[CRLF]a=keywds:" 4 068D 000B [24] 6
"[CRLF]a=tool:" 4 06F6 0009 [24] 6
"[CRLF]a=ptime:" 4 06E0 000A [24] 6
"[CRLF]a=maxptime:" 4 05F2 000D [24] 6
"[CRLF]a=rtpmap:" 2 0C2E 000B [24] 6, [32] 5
"[CRLF]a=recvonly" 3 08DD 000C [24] 6
"[CRLF]a=sendrecv" 3 0952 000C [24] 6
"[CRLF]a=sendonly" 3 08F5 000C [24] 6
"[CRLF]a=inactive" 3 08A2 000C [24] 6
"[CRLF]a=orient:portrait" 4 098B 0013 [24] 6
"[CRLF]a=orient:landscape" 4 03D2 0014 [24] 6
"[CRLF]a=orient:seascape" 4 050B 0013 [24] 6
Garcia et al. [Page 25]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
"[CRLF]a=type:broadcast" 4 041E 0012 [24] 6
"[CRLF]a=type:meeting" 4 055B 0010 [24] 6
"[CRLF]a=type:moderated" 4 051E 0012 [24] 6
"[CRLF]a=type:test" 4 08CD 000D [24] 6
"[CRLF]a=type:H.332" 4 081F 000E [24] 6
"[CRLF]a=type:recvonly" 4 054A 0011 [24] 6
"[CRLF]a=charset:" 4 065B 000C [24] 6
"[CRLF]a=sdplang:" 4 0643 000C [24] 6
"[CRLF]a=lang:" 4 06FF 0009 [24] 6
"[CRLF]a=framerate:" 4 05DD 000E [24] 6
"[CRLF]a=quality:" 4 0637 000C [24] 6
"[CRLF]a=fmtp:" 2 0C72 0009 [24] 6
"[CRLF]a=curr:" 2 0C69 0009 [11] 4
"[CRLF]a=des:" 2 0C8C 0008 [11] 4
"[CRLF]a=conf:" 2 0C7B 0009 [11] 4
"[CRLF]a=mid:" 4 075A 0008 [26] 3
"[CRLF]a=group:" 4 06D6 000A [26] 3
"[CRLF]a=key-mgmt:MIKEY" 4 0257 0012 [28] 2.1,
[29] 6
"[CRLF]a=key-mgmt:" 4 0257 000D [28] 2.1
"[CRLF]a=" 5 0257 0004 [24] 6
"[CRLF]m=audio " 2 0C43 000A [24] 6
"[CRLF]m=video " 2 0C39 000A [24] 6
"[CRLF]m=application " 4 0330 0010 [24] 6
"[CRLF]m=data " 4 0708 0009 [24] 6
"[CRLF]m=control " 4 0667 000C [24] 6
"[CRLF]m=" 5 0330 0004 [24] 6
"AS " 3 0934 0003 [24] 6
"CT " 3 0931 0003 [24] 6
"RTP/AVP " 2 0C05 0008 [24] A
"RTP/SAVP " 3 08B7 0009 [30] 12
"RTP/AVPF " 3 08AE 0009 [31] 4.1
"udp" 4 07E3 0003 [2] 25.1,
[24] A, [2] 25.1, [24] A
"0.0.0.0" 4 0BA0 0007 [24] A
"qos" 2 0CC5 0003 [11] 4
"mandatory" 2 0A93 0009 [11] 4
"optional" 2 09C5 0008 [2] 20.11,
[11] 4, [2] 20.11, [11] 4
"none" 2 0B21 0004 [34] 4.2,
[11] 4
"failure" 4 0A73 0007 [11] 4
"unknown" 4 0BFC 0007 [11] 4
"e2e" 2 0AC8 0003 [11] 4
"local" 2 0A4D 0005 [11] 4
"remote" 2 0AD6 0006 [11] 4
"send" 2 08F9 0004 [11] 4
"recv" 2 0553 0004 [11] 4
"sendrecv" 2 0956 0008 [11] 4
"AMR" 2 0C03 0003 [25] 8
"octet-align=" 4 0961 000C [25] 8
Garcia et al. [Page 26]
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"mode-set=" 4 0711 0009 [25] 8
"mode-change-period=" 4 04F8 0013 [25] 8
"mode-change-neighbor=" 4 04A2 0015 [25] 8
"crc=" 4 07B2 0004 [25] 8
"robust-sorting=" 4 0166 000F [25] 8
"interleaving=" 4 0323 000D [25] 8
"channels=" 4 060E 0009 [25] 8
"octet-align" 4 0961 000B [25] 8
"telephone-event" 4 00EE 000F [27] 3.3, 6.1
"events" 4 00F8 0006 [27] 6.1
"rate" 4 052B 0004 [27] 6.1, 6.2
"tone" 4 042F 0004 [27] 6.2
"rtcp-fb" 4 04C0 0007 [31] 4
"ack" 4 0D2B 0003 [31] 4
"nack" 4 0D2A 0004 [31] 4
"ttr-int" 4 09A3 0007 [31] 4
"app" 4 0334 0003 [31] 4
"rpsi" 4 0CFD 0004 [31] 4
"pli" 4 0336 0003 [31] 4
"sli" 4 09C0 0003 [31] 4
Table B.1: SDP input strings for the SIP/SDP dictionary
Garcia et al. [Page 27]
INTERNET-DRAFT The static SIP/SDP dictionary for SigComp August 2002
Full Copyright Statement
Copyright (C) The Internet Society (2002). All Rights Reserved.
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Expiration Date
This memo is filed as <draft-ietf-sipping-sigcomp-sip-
dictionary-04.txt> and expires February 2003.
Garcia et al. [Page 28]
