Network Working Group R. Sparks, Ed. Internet-Draft dynamicsoft Expires: April 23, 2004 A. Hawrylyshen Jasomi Networks A. Johnston MCI J. Rosenberg dynamicsoft H. Schulzrinne Columbia University October 24, 2003 Session Initiation Protocol Torture Test Messages draft-ietf-sipping-torture-tests-01 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. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http:// www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on April 23, 2004. Copyright Notice Copyright (C) The Internet Society (2003). All Rights Reserved. Abstract This informational document gives examples of Session Initiation Protocol (SIP) test messages designed to exercise and "torture" a parser. Sparks, et al. Expires April 23, 2004 [Page 1] Internet-Draft SIP Torture Tests October 2003 Table of Contents 1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Document Conventions . . . . . . . . . . . . . . . . . . 4 2.1 Representing Long Lines . . . . . . . . . . . . . . . . 4 2.2 Representing Non-printable Characters . . . . . . . . . 5 2.3 Representing Long Repeating Strings . . . . . . . . . . 5 3. SIP Test Messages . . . . . . . . . . . . . . . . . . . 6 3.1 Parser tests (syntax) . . . . . . . . . . . . . . . . . 6 3.1.1 Valid messages . . . . . . . . . . . . . . . . . . . . . 6 3.1.1.1 A short tortuous INVITE . . . . . . . . . . . . . . . . 6 3.1.1.2 Wide range of valid characters . . . . . . . . . . . . . 8 3.1.1.3 Valid use of the % escaping mechanism . . . . . . . . . 9 3.1.1.4 Escaped nulls in URIs . . . . . . . . . . . . . . . . . 10 3.1.1.5 Use of % when it is not an escape . . . . . . . . . . . 11 3.1.1.6 Message with no LWS between display name and < . . . . . 12 3.1.1.7 Long values in header fields . . . . . . . . . . . . . . 12 3.1.1.8 Extra trailing octets in a UDP datagram . . . . . . . . 14 3.1.1.9 Semicolon separated parameters in URI user part . . . . 15 3.1.1.10 Varied and unknown transport types . . . . . . . . . . . 15 3.1.1.11 S/MIME signed message . . . . . . . . . . . . . . . . . 16 3.1.1.12 Unusual reason phrase . . . . . . . . . . . . . . . . . 19 3.1.1.13 Empty reason phrase . . . . . . . . . . . . . . . . . . 20 3.1.2 Invalid messages . . . . . . . . . . . . . . . . . . . . 20 3.1.2.1 Extraneous header field separators . . . . . . . . . . . 20 3.1.2.2 Content length larger than message . . . . . . . . . . . 21 3.1.2.3 Negative Content-Length . . . . . . . . . . . . . . . . 22 3.1.2.4 Request scalar fields with overlarge values . . . . . . 22 3.1.2.5 Response scalar fields with overlarge values . . . . . . 23 3.1.2.6 Unterminated quoted string in display-name . . . . . . . 24 3.1.2.7 <> enclosing Request-URI . . . . . . . . . . . . . . . . 25 3.1.2.8 Malformed SIP Request-URI (embedded LWS) . . . . . . . . 25 3.1.2.9 Multiple SP separating Request-Line elements . . . . . . 26 3.1.2.10 SP characters at end of Request-Line . . . . . . . . . . 27 3.1.2.11 Escaped headers in SIP Request-URI . . . . . . . . . . . 27 3.1.2.12 Invalid timezone in Date header field . . . . . . . . . 28 3.1.2.13 Failure to enclose name-addr URI in <> . . . . . . . . . 29 3.1.2.14 Spaces within addr-spec . . . . . . . . . . . . . . . . 29 3.1.2.15 Non-token characters in display-name . . . . . . . . . . 30 3.1.2.16 Unknown protocol version . . . . . . . . . . . . . . . . 30 3.1.2.17 Start line and CSeq method mismatch . . . . . . . . . . 31 3.1.2.18 Unknown Method with CSeq method mismatch . . . . . . . . 31 3.1.2.19 Overlarge response code . . . . . . . . . . . . . . . . 32 3.2 Transaction layer semantics . . . . . . . . . . . . . . 32 3.2.1 Missing transaction identifier . . . . . . . . . . . . . 32 3.3 Application layer semantics . . . . . . . . . . . . . . 33 3.3.1 Missing Required Header Fields . . . . . . . . . . . . . 33 3.3.2 Request-URI with unknown scheme . . . . . . . . . . . . 33 Sparks, et al. Expires April 23, 2004 [Page 2] Internet-Draft SIP Torture Tests October 2003 3.3.3 Request-URI with known but atypical scheme . . . . . . . 34 3.3.4 Unknown URI schemes in header fields . . . . . . . . . . 34 3.3.5 Proxy-Require and Require . . . . . . . . . . . . . . . 35 3.3.6 Unknown Content-Type . . . . . . . . . . . . . . . . . . 35 3.3.7 Unknown authorization scheme . . . . . . . . . . . . . . 36 3.3.8 Multiple values in single value required fields . . . . 37 3.3.9 Multiple Content-Length values . . . . . . . . . . . . . 37 3.3.10 200 OK Response with broadcast Via header field value . 38 3.3.11 Max-Forwards of zero . . . . . . . . . . . . . . . . . . 39 3.3.12 REGISTER with a contact header parameter . . . . . . . . 39 3.3.13 REGISTER with a url parameter . . . . . . . . . . . . . 40 3.3.14 REGISTER with a url escaped header . . . . . . . . . . . 40 3.3.15 Unacceptable Accept offering . . . . . . . . . . . . . . 41 3.4 Backward compatibility . . . . . . . . . . . . . . . . . 42 3.4.1 INVITE with RFC2543 syntax . . . . . . . . . . . . . . . 42 4. Security Considerations . . . . . . . . . . . . . . . . 42 5. Open Issues and Remaining Work . . . . . . . . . . . . . 43 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . 43 Informative References . . . . . . . . . . . . . . . . . 44 Authors' Addresses . . . . . . . . . . . . . . . . . . . 44 A. Bit-exact archive of each test message . . . . . . . . . 45 A.1 Encoded Reference Messages . . . . . . . . . . . . . . . 46 Intellectual Property and Copyright Statements . . . . . 51 Sparks, et al. Expires April 23, 2004 [Page 3] Internet-Draft SIP Torture Tests October 2003 1. Overview This document is informational, and is NOT NORMATIVE on any aspect of SIP. This document contains test messages based on the current version (2.0) of the Session Initiation Protocol as defined in [RFC3261]. Some messages exercise SIP's use of SDP as described in [RFC3264]. These messages were developed and refined at the SIPIt interoperability test events. The test messages are organized into several sections. Some stress only a SIP parser and others stress both the parser and the application above it. Some messages are valid, and some are not. Each example clearly calls out what makes any invalid messages incorrect. This document does not attempt to catalog every way to make an invalid message, nor does it attempt to be comprehensive in exploring unusual, but valid, messages. Instead, it tries to focus on areas that have caused interoperability problems or have particularly unfavorable characteristics if they are handled improperly. This document is a seed for a test plan, not a test plan in itself. The messages are presented in the text using a set of markup conventions to avoid ambiguity and meet Internet-Draft layout requirements. To resolve any remaining ambiguity, a bit-accurate version of each message is encapsulated in an appendix. 2. Document Conventions This document contains many example SIP messages. Although SIP is a text-based protocol, many of these examples cannot be unambiguously rendered without additional markup due to the constraints placed on the formatting of RFCs. This document defines and uses the markup defined in this section to remove that ambiguity. This markup uses the start and end tag conventions of XML, but does not define any XML document type. The appendix contains an encoded binary form of all the messages and the algorithm needed to decode them into files. 2.1 Representing Long Lines Several of these examples contain unfolded lines longer than 72 characters. These are captured between tags. The single unfolded line is reconstructed by directly concatenating all lines appearing between the tags (discarding any line-feeds or carriage Sparks, et al. Expires April 23, 2004 [Page 4] Internet-Draft SIP Torture Tests October 2003 returns). There will be no whitespace at the end of lines. Any whitespace appearing at a fold-point will appear at the beginning of a line. The following represent the same string of bits: Header-name: first value, reallylongsecondvalue, third value Header-name: first value, reallylongsecondvalue , third value Header-name: first value, reallylong second value, third value Note that this is NOT SIP header line folding where different strings of bits have equivalent meaning. 2.2 Representing Non-printable Characters Several examples contain binary message bodies or header field values containing non-ascii range UTF-8 encoded characters. These are rendered here as a pair of hexadecimal digits per octet between tags. This rendering applies even inside quoted-strings. The following represent the same string of bits: Header-name: value one Header-name: value206F6Ee The following is a Subject header field containing the euro symbol: Subject: E282AC 2.3 Representing Long Repeating Strings Several examples contain very large data values created with repeating bit strings. Those will be rendered here using value. As with this rendering applies even inside quoted-strings. For example, the value "abcabcabc" can be rendered as abc. A display name of "1000000 bottles of beer" could be rendered as To: "130 bottles of beer" and a Max-Forwards header field with a value of one google will be rendered here as Max-Forwards: 10 3. SIP Test Messages 3.1 Parser tests (syntax) 3.1.1 Valid messages 3.1.1.1 A short tortuous INVITE This short, relatively human-readable message contains: o line folding all over o escaped characters within quotes o an empty subject o LWS between colons, semicolons, header field values, and other fields o both comma separated and separate listing of header field values o mix or short and long form for the same header field name o unknown header fields o unknown header field with a value that would be syntactically invalid if it were defined in terms of generic-param o unusual header field ordering o unusual header field name character case Sparks, et al. Expires April 23, 2004 [Page 6] Internet-Draft SIP Torture Tests October 2003 o unknown parameters of a known header field o uri parameter with no value o header parameter with no value o integer fields (Max-Forwards and CSeq) with leading zeros All elements should treat this as a well-formed request. The UnknownHeaderWithUnusualValue header field deserves special attention. If this header field were defined in terms of comma separated values with semicolon separated parameters (as many of the existing defined header fields), this would be invalid. However, since the receiving element does not know the definition of the syntax for this field, it must parse it as a header-value. Proxies would forward this header field unchanged. Endpoints would ignore the header field. Message Details : INVITE sip:vivekg@chair-dnrc.example.com;unknownparam SIP/2.0 TO : sip:vivekg@chair-dnrc.example.com ; tag = 1918181833n from : "J Rosenberg \\\"" ; tag = 98asjd8 MaX-fOrWaRdS: 0068 Call-ID: 0ha0isndaksdj@192.0.2.1 Content-Length : 151 cseq: 0009 INVITE Via : SIP / 2.0 /UDP 192.0.2.2;branch=390skdjuw s : NewFangledHeader: newfangled value continued newfangled value UnknownHeaderWithUnusualValue: ;;,,;;,; Content-Type: application/sdp Route: v: SIP / 2.0 / TCP spindle.example.com ; branch = z9hG4bK9ikj8 , SIP / 2.0 / UDP 192.168.255.111 ; branch= z9hG4bK30239 m:"Quoted string \"\"" ; newparam = newvalue ; Sparks, et al. Expires April 23, 2004 [Page 7] Internet-Draft SIP Torture Tests October 2003 secondparam ; q = 0.33 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.3 s=- c=IN IP4 192.0.2.4 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.1.2 Wide range of valid characters This message exercises a wider range of characters in several key syntactic elements than implementations usually see. Of particular note: o The Method contains non-alpha characters from token. Note that % is not an escape character for this field. A method of IN%56ITE is an unknown method. It is not the same as a method of INVITE o The Request-URI contain unusual, but legal, characters o A branch parameter contains all non-alphanum characters from token o The To header field value's quoted-string contains quoted-pair expansions, including a quoted NULL character o The name part of name-addr in the From header field value contains multiple tokens (instead of a quoted string) with all non-alphanum characters from the token production rule. That value also has an unknown header parameter whose name contains the non-alphanum token characters and whose value is a non-ascii range UTF-8 encoded string. The tag parameter on this value contains the non-alphanum token characters o The Call-ID header field value contains the non-alphanum characters from word. Notice that in this production: * % is not an escape character. (It is only an escape character in productions matching the rule "escaped") * " does not start a quoted-string. None of ',` or " imply that there will be a matching symbol later in the string * The characters []{}()<> do not have any grouping semantics. They are not required to appear in balanced pairs Sparks, et al. Expires April 23, 2004 [Page 8] Internet-Draft SIP Torture Tests October 2003 o There is an unknown header field (matching extension-header) with non-alphanum token characters in its name and a UTF8-NONASCII value If this unusual URI has been defined at a proxy, the proxy will forward this request normally. Otherwise a proxy will generate a 404. Endpoints will generate a 501 listing the methods they understand in an Allow header field. Message Details : !interesting-Method0123456789_*+`.%indeed'~ sip:1_unusual.URI~(to-be!sure)&isn't+it$/crazy?,/;;* :&it+has=1,weird!*pas$wo~d_too.(doesn't-it) @example.com SIP/2.0 Via: SIP/2.0/TCP host1.example.com;branch=z9hG4bK-.!%66*_+`'~ To: "BEL:\07 NUL:\00 DEL:\7F" From: token1~` token2'+_ token3*%!.- ;fromParam''~+*_!.-%= "D180D0B0D0B1D0BED182D0B0D18ED189D0B8D0B9" ;tag=_token~1'+`*%!-. Call-ID: word%ZK-!.*_+'@word`~)(><:\/"][?}{ CSeq: 139122385 !interesting-Method0123456789_*+`.%indeed'~ Max-Forwards: 255 extensionHeader-!.%*+_`'~= EFBBBFE5A4A7E5819CE99BBB Content-Length: 0 3.1.1.3 Valid use of the % escaping mechanism This INVITE exercises the % HEX HEX escaping mechanism in several places. The request is syntactically valid. Interesting features include: o The request-URI has sips:user@example.com embedded in its userpart. What that might mean to example.net is beyond the scope Sparks, et al. Expires April 23, 2004 [Page 9] Internet-Draft SIP Torture Tests October 2003 of this document. o The From and To URIs have escaped characters in their userparts. o The Contact URI has escaped characters in the URI parameters. Note that the "name" uri-parameter has a value of "value%41" which is NOT equivalent to "valueA". Per [RFC2396], unescaping URI components is never performed recursively. A parser must accept this as a well-formed message. The application using the message must treat the % HEX HEX expansions as equivalent to the character being encoded. The application must not try to interpret % as an escape character in those places where % HEX HEX ("escaped" in the grammar) is not a valid part of the construction. In [RFC3261], "escaped" only occurs in the expansions of SIP-URI, SIPS-URI, and Reason-Phrase Message Details : INVITE sip:sips%3Auser%40example.com@example.net SIP/2.0 To: sip:%75se%72@example.com From: ;tag=938 Max-Forwards: 87 i: 239409asdfakjkn23onasd0-3234 CSeq: 234234 INVITE Via: SIP/2.0/UDP host5.example.net;branch=z9hG4bKkdjuw C: application/sdp Contact: Content-Length: 151 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.1 s=- c=IN IP4 192.0.2.1 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.1.4 Escaped nulls in URIs This register request contains several URIs with nulls in the userpart. The message is well formed - parsers must accept this message. Implementations must take special care when unescaping the AOR in this request to not prematurely shorten the username. This request registers two distinct contact URIs. Sparks, et al. Expires April 23, 2004 [Page 10] Internet-Draft SIP Torture Tests October 2003 Message Details : REGISTER sip:example.com SIP/2.0 To: sip:null-%00-null@example.com From: sip:null-%00-null@example.com;tag=839923423 Max-Forwards: 70 Call-ID: 39203ndfvkjdasfkq3w4otrq0adsfdfnavd CSeq: 14398234 REGISTER Via: SIP/2.0/UDP host5.example.com;branch=z9hG4bKkdjuw Contact: Contact: L:0 3.1.1.5 Use of % when it is not an escape Most of the places % can appear in a SIP message, it is not an escape character. This can surprise the unwary implementor. The following well-formed request has these properties: o The request method is unknown. It is NOT equivalent to REGISTER o The display-name portion of the To and From header fields is "%Z%45". Note that this is not the same as %ZE o This message has two Contact header field values, not three. %lt;sip:alias2@host2.example.com%gt; is a C%6Fntact header field value A parser should accept this message as well formed. A proxy would forward or reject the message depending on what the Request-URI meant to it. An endpoint would reject this message with a 501. Message Details : RE%47IST%45R sip:registrar.example.com SIP/2.0 To: "%Z%45" From: "%Z%45" ;tag=f232jadfj23 Call-ID: asdfnqwo34rq23i34jrjasdcnl23nrlknsdf Via: SIP/2.0/TCP host.example.com;branch=z9hG4bK209%fzsnel234 CSeq: 29344 RE%47IST%45R Max-Forwards: 70 Contact: C%6Fntact: Contact: l: 0 Sparks, et al. Expires April 23, 2004 [Page 11] Internet-Draft SIP Torture Tests October 2003 3.1.1.6 Message with no LWS between display name and < This OPTIONS request is not valid per the grammar in RFC 3261. since there is no LWS between the quoted string in the display name and < in the From header field value. This has been identified as a specification bug that will be removed when RFC 3261 is revised. Elements should accept this request as well formed. Message Details : OPTIONS sip:user@example.com SIP/2.0 To: sip:user@example.com From: "caller";tag=323 Max-Forwards: 70 Call-ID: 1234abcd@funky.example.com CSeq: 60 OPTIONS Via: SIP/2.0/UDP funky.example.com;branch=z9hG4bKkdjuw l: 0 3.1.1.7 Long values in header fields This well-formed request contains header fields with many values and values that are very long. Features include: o The To header field has a long display name, and long uri parameter names and values o The From header field has long header parameter names and values, in particular a very long tag o The Call-ID is one long token Message Details : INVITE sip:user@example.com SIP/2.0 To: "I have a user name of extreme proportion" longvalue; longparamname=shortvalue; verylongParameterNameWithNoValue> F: sip: Sparks, et al. Expires April 23, 2004 [Page 12] Internet-Draft SIP Torture Tests October 2003 amazinglylongcallername@example.net ;tag=12982424 ;unknownheaderparamname= unknowheaderparamvalue ;unknownValuelessparamname Call-ID: onereallylongcallid CSeq: 3882340 INVITE Unknown-Long-Name: unknown-long-value; unknown-long-parameter-name = unknown-long-parameter-value Via: SIP/2.0/TCP sip33.example.com v: SIP/2.0/TCP sip32.example.com V: SIP/2.0/TCP sip31.example.com Via: SIP/2.0/TCP sip30.example.com ViA: SIP/2.0/TCP sip29.example.com VIa: SIP/2.0/TCP sip28.example.com VIA: SIP/2.0/TCP sip27.example.com via: SIP/2.0/TCP sip26.example.com viA: SIP/2.0/TCP sip25.example.com vIa: SIP/2.0/TCP sip24.example.com vIA: SIP/2.0/TCP sip23.example.com V : SIP/2.0/TCP sip22.example.com v : SIP/2.0/TCP sip21.example.com V : SIP/2.0/TCP sip20.example.com v : SIP/2.0/TCP sip19.example.com Via : SIP/2.0/TCP sip18.example.com Via : SIP/2.0/TCP sip17.example.com Via: SIP/2.0/TCP sip16.example.com Via: SIP/2.0/TCP sip15.example.com Via: SIP/2.0/TCP sip14.example.com Via: SIP/2.0/TCP sip13.example.com Via: SIP/2.0/TCP sip12.example.com Via: SIP/2.0/TCP sip11.example.com Via: SIP/2.0/TCP sip10.example.com Via: SIP/2.0/TCP sip9.example.com Via: SIP/2.0/TCP sip8.example.com Via: SIP/2.0/TCP sip7.example.com Via: SIP/2.0/TCP sip6.example.com Via: SIP/2.0/TCP sip5.example.com Via: SIP/2.0/TCP sip4.example.com Via: SIP/2.0/TCP sip3.example.com Via: SIP/2.0/TCP sip2.example.com Via: SIP/2.0/TCP sip1.example.com Sparks, et al. Expires April 23, 2004 [Page 13] Internet-Draft SIP Torture Tests October 2003 Via: SIP/2.0/TCP host.example.com;received=192.0.2.5; branch=verylongbranchvalue Max-Forwards: 70 Contact: amazinglylongcallername @host5.example.net> Content-Type: application/sdp l: 151 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.1 s=- c=IN IP4 192.0.2.1 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.1.8 Extra trailing octets in a UDP datagram This message contains a single SIP REGISTER request, which ostensibly arrived over UDP in a single datagram. The packet contained extra octets after the body (which in this case has zero length). Those octets happen to look like a SIP INVITE request, but (per section 18.3 of [RFC3261]) they are just spurious noise that must be ignored. A SIP element receiving this datagram would handle the REGISTER request normally and ignore the extra bits that look like an INVITE request. If the element is a proxy choosing to forward the REGISTER, the INVITE octets would not appear in the forwarded request. Message Details : REGISTER sip:example.com SIP/2.0 To: sip:j.user@example.com From: sip:j.user@example.com;tag=43251j3j324 Max-Forwards: 8 I: 0ha0isndaksdj99sdfafnl3lk233412 Contact: sip:j.user@host.example.com CSeq: 8 REGISTER Via: SIP/2.0/UDP 192.0.2.125;branch=z9hG4bKkdjuw23492 Content-Length: 0 Sparks, et al. Expires April 23, 2004 [Page 14] Internet-Draft SIP Torture Tests October 2003 INVITE sip:joe@example.com SIP/2.0 t: sip:joe@example.com From: sip:caller@example.net;tag=141334 Max-Forwards: 8 Call-ID: 0ha0isnda977644900765@192.0.2.15 CSeq: 8 INVITE Via: SIP/2.0/UDP 192.0.2.15;branch=z9hG4bKkdjuw380234 Content-Type: application/sdp Content-Length: 151 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.15 s=- c=IN IP4 192.0.2.15 t=0 0 m=audio 492170 RTP/AVP 0 12 m =video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.1.9 Semicolon separated parameters in URI user part This request has a semicolon-separated parameter contained in the "user" part of the Request-URI (whose value contains an escaped @ symbol). Receiving elements will accept this as a well formed message. The Request-URI will parse such that the user part is "user;par=u@example.net". Message Details : OPTIONS sip:user;par=u%40example.net@example.com SIP/2.0 To: sip:j_user@example.com From: sip:caller@example.org;tag=33242 Max-Forwards: 3 Call-ID: 0ha0isndaksdj CSeq: 8 OPTIONS Accept: application/sdp, application/pkcs7-mime, multipart/mixed, multipart/signed, message/sip, message/sipfrag Via: SIP/2.0/UDP 192.0.2.1;branch=z9hG4bKkdjuw l: 0 3.1.1.10 Varied and unknown transport types This request contains Via header field values with all known Sparks, et al. Expires April 23, 2004 [Page 15] Internet-Draft SIP Torture Tests October 2003 transport types and exercises the transport extension mechanism. Parsers must accept this message as well formed. Elements receiving this message would process it exactly as if the 2nd and subsequent header field values specified UDP (or other transport). Message Details : OPTIONS sip:user@example.com SIP/2.0 To: sip:user@example.com From: ;tag=323 Max-Forwards: 70 Call-ID: nfc9ehfdfaekijh4akdnaqjkwendsasfdj Accept: application/sdp CSeq: 60 OPTIONS Via: SIP/2.0/UDP t1.example.com;branch=z9hG4bKkdjuw Via: SIP/2.0/SCTP t2.example.com;branch=z9hG4bKklasjdhf Via: SIP/2.0/TLS t3.example.com;branch=z9hG4bK2980unddj Via: SIP/2.0/UNKNOWN t4.example.com;branch=z9hG4bKasd0f3en Via: SIP/2.0/TCP t5.example.com;branch=z9hG4bK0a9idfnee l: 0 3.1.1.11 S/MIME signed message This is a signed INVITE request. The signature is binary encoded. The body contains null (0x00) characters. Receivers must take care to properly frame the received message. Parsers must accept this message as well formed, even if the application above the parser does not support multipart/signed. Message Details : INVITE sip:receiver@example.com SIP/2.0 Via: SIP/2.0/UDP host5.example.org;branch=z9hG4bK923rnasdkl3 To: From: ;tag=2390234seiu3 Call-ID: afnkjeriuoqeiuavnklafekjq34iu43uawe CSeq: 282398492 INVITE Max-Forwards: 70 Contact: Content-Length: 3134 Content-Type: multipart/signed; protocol="application/pkcs-7-signature"; micalg=sha1; boundary="----34CF59C076641DD0879594444157C7EB" Sparks, et al. Expires April 23, 2004 [Page 16] Internet-Draft SIP Torture Tests October 2003 ------34CF59C076641DD0879594444157C7EB Content-Type: message/sip INVITE sip:receiver@example.com SIP/2.0 Via: SIP/2.0/UDP host5.example.org;branch=z9hG4bK923rnasdkl3 To: From: ;tag=2390234seiu3 Call-ID: afnkjeriuoqeiuavnklafekjq34iu43uawe CSeq: 282398492 INVITE Max-Forwards: 70 Contact: Accept: application/sdp, application/pkcs7-mime, multipart/mixed, multipart/signed, message/sip, message/sipfrag Content-Type: application/sdp Content-Length: 149 v=0 o=sender 29739 7272939 IN IP4 192.0.2.1 s=- c=IN IP4 192.0.2.1 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC ------34CF59C076641DD0879594444157C7EB Content-Type: application/pkcs-7-signature; name="smime.p7s" Content-Transfer-Encoding: binary Content-Disposition: attachment; filename="smime.p7s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parks, et al. Expires April 23, 2004 [Page 17] Internet-Draft SIP Torture Tests October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parks, et al. Expires April 23, 2004 [Page 18] Internet-Draft SIP Torture Tests October 2003 9A5B120E6D559F4953A3C3C7C97B4EAD8388F1508F7AD2FC71CC7B9ED2844789 60A3ECF87984E25A15B4AB63F150C30570B6315A2327E381EE11E866DC1405DA 29E74CC20201816F1516DD893332D9A8E26FBAEC237C494F3EFAEF4EBCD2122C DE7D57DECD------34CF59C076641DD0879594444157C7EB-- 3.1.1.12 Unusual reason phrase This 200 response contains a reason phrase other than "OK". The reason phrase is intended for human consumption, and may contain any string produced by Reason-Phrase = *(reserved / unreserved / escaped / UTF8-NONASCII / UTF8-CONT / SP / HTAB) This particular response contains unreserved and non-ASCII UTF-8 characters.This response is well formed. A parser must accept this message. Message Details : SIP/2.0 200 = 2**3 * 5**2 D0BDD0BE20D181D182 D0BE20D0B4D0B5D0B2D18FD0BDD0BED181D182D0BE20D0B4 D0B5D0B2D18FD182D18C202D20D0BFD180D0BED181D182D0 BED0B5 Via: SIP/2.0/UDP 192.0.2.198;branch=z9hG4bK1324923 Call-ID: 0384840201234ksdfak3j2erwedfsASdf CSeq: 35 INVITE From: sip:user@example.com;tag=11141343 To: sip:user@example.edu;tag=2229 Content-Length: 159 Content-Type: application/sdp Contact: v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.198 s=- c=IN IP4 192.0.2.198/127 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC Sparks, et al. Expires April 23, 2004 [Page 19] Internet-Draft SIP Torture Tests October 2003 3.1.1.13 Empty reason phrase This well formed response contains no reason phrase. A parser must accept this message. The space character after the reason code is required. If it were not present, this message could be rejected as invalid (a liberal receiver would accept it anyway). Message Details : SIP/2.0 10020 Via: SIP/2.0/UDP 192.0.2.105;branch=z9hG4bK2398ndaoe Call-ID: adsn2309jasndj203insdf99223ndf CSeq: 35 INVITE From: ;tag=39ansfi3 To: ;tag=902jndnke3 Content-Length: 0 Contact: 3.1.2 Invalid messages This section contains several invalid messages reflecting errors seen at interoperability events and exploring important edge conditions that can be induced through malformed messages. This section does not attempt to be a comprehensive list of all types of invalid messages. 3.1.2.1 Extraneous header field separators The Via and header field of this request contains contain additional semicolons and commas without parameters or values. The Contact header field contains additional semicolons without parameters. This message is syntactically invalid. An element receiving this request should respond with a 400 Bad Request error. Message Details : INVITE sip:user@example.com SIP/2.0 To: sip:j.user@example.com From: sip:caller@example.net;tag=134161461246 Max-Forwards: 7 Call-ID: 0ha0isndaksdjasdf3234nas CSeq: 8 INVITE Via: SIP/2.0/UDP 192.0.2.15;;,;,, Contact: "Joe" ;;;; Content-Length: 153 Sparks, et al. Expires April 23, 2004 [Page 20] Internet-Draft SIP Torture Tests October 2003 Content-Type: application/sdp v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.15 s=- c=IN IP4 192.0.2.15 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.2.2 Content length larger than message This is a request message with a Content Length that is larger than the length of the body. When sent UDP (as this message ostensibly was), the receiving element should respond with a 400 Bad Request error. If this message were received over a stream-based transport such as TCP, there's not much you can do but wait for more data on the stream and close the connection if none is forthcoming in a reasonable period of time. Message Details : INVITE sip:user@example.com SIP/2.0 Max-Forwards: 80 To: sip:j.user@example.com From: sip:caller@example.net;tag=93942939o2 Contact: Call-ID: 0ha0isndaksdjweiafasdk3 CSeq: 8 INVITE Via: SIP/2.0/UDP host5.example.com;branch=z9hG4bK-39234-23523 Content-Type: application/sdp Content-Length: 9999 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.155 s=- c=IN IP4 192.0.2.155 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC Sparks, et al. Expires April 23, 2004 [Page 21] Internet-Draft SIP Torture Tests October 2003 3.1.2.3 Negative Content-Length This request has a negative value for Content-Length. An element receiving this message should respond with an error. This request appeared over UDP, so the remainder of the datagram can simply be discarded. If a request like this arrives over TCP, the framing error is not recoverable and the connection should be closed. The same behavior is appropriate for messages that arrive without a numeric value in the Content-Length header field such as: Content-Length: five Implementors should take extra precautions if the technique they choose for converting this ascii field into an integral form can return a negative value. In particular, the result must not be used as a counter or array index. Message Details : INVITE sip:user@example.com SIP/2.0 Max-Forwards: 254 To: sip:j.user@example.com From: sip:caller@example.net;tag=32394234 Call-ID: 0ha0isndaksdj2193423r542w35 CSeq: 0 INVITE Via: SIP/2.0/UDP 192.0.2.53;branch=z9hG4bKkdjuw Contact: Content-Type: application/sdp Content-Length: -999 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.53 s=- c=IN IP4 192.0.2.53 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.2.4 Request scalar fields with overlarge values This request contains several scalar header field values outside their legal range. o the CSeq sequence number is >2**32-1. Sparks, et al. Expires April 23, 2004 [Page 22] Internet-Draft SIP Torture Tests October 2003 o the Max-Forwards value is >255. o the Expires value is >2**32-1. o the Contact expires parameter value is >2**32-1. An element receiving this request should respond with a 400 Bad Request due to the CSeq error. If only the Max-Forwards field were in error, the element could choose process the request as if the field were absent. If only the expiry values were in error, the element could treat them as if they contained the default values for expiration (3600 in this case). Other scalar request fields that may contain aberrant values include, but are not limited to, the Contact q value, the Timestamp value, and the Via ttl parameter. Message Details : REGISTER sip:example.com SIP/2.0 Via: SIP/2.0/TCP host129.example.com;branch=z9hG4bK342sdfoi3 To: From: ;tag=239232jh3 CSeq: 36893488147419103232 REGISTER Call-ID: asdnw3qjr23o0pd9vanlq3wnrlnewofjas9ui32 Max-Forwards: 300 Expires: 10 Contact: ;expires=280297596632815 Content-Length: 0 3.1.2.5 Response scalar fields with overlarge values This response contains several scalar header field values outside their legal range. o the CSeq sequence number is >2**32-1. o The Retry-After field is unreasonably large (note that RFC 3261 does not define a legal range for this field). o The Warning field has a warning-value with more than 3 digits An element receiving this response will simply discard it. Message Details : Sparks, et al. Expires April 23, 2004 [Page 23] Internet-Draft SIP Torture Tests October 2003 SIP/2.0 503 Service Unavailable Via: SIP/2.0.TCP host129.example.com;branch=z0hG4bKzzxdiwo34sw To: From: ;tag=2easdjfejw CSeq: 9292394834772304023312 OPTIONS Call-ID: nvoao34irnoase0of0234hn2qofoaf0232aewf2394r Retry-After: 949302838503028349304023988 Warning: 1812 overture "In Progress" Content-Length: 0 3.1.2.6 Unterminated quoted string in display-name This is a request with an unterminated quote in the display name of the To field. An element receiving this request should return an 400 Bad Request error. An element could attempt to infer a terminating quote and accept the message. Such an element needs to take care that it makes a reasonable inference when it encounters To: "Mr J. User Message Details : INVITE sip:user@example.com SIP/2.0 To: "Mr. J. User From: sip:caller@example.net;tag=93334 Max-Forwards: 10 Call-ID: 0ha0isndaksdj Contact: CSeq: 8 INVITE Via: SIP/2.0/UDP 192.0.2.59:5050;branch=z9hG4bKkdjuw39234 Content-Type: application/sdp Content-Length: 153 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.15 s=- c=IN IP4 192.0.2.15 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC Sparks, et al. Expires April 23, 2004 [Page 24] Internet-Draft SIP Torture Tests October 2003 3.1.2.7 <> enclosing Request-URI This INVITE request is invalid because the Request-URI has been enclosed within in "<>". It is reasonable to always reject a request with this error with a 400 Bad Request. Elements attempting to be liberal with what they accept may choose to ignore the brackets. If the element forwards the request, it must not include the brackets in the messages it sends. Message Details : INVITE SIP/2.0 To: sip:user@example.com From: sip:caller@example.net;tag=39291 Max-Forwards: 23 Call-ID: 1@192.0.2.5 CSeq: 1 INVITE Via: SIP/2.0/UDP 192.0.2.5 Contact: Content-Type: application/sdp Content-Length: 160 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.5 s=- c=IN IP4 192.0.2.5 t=3149328700 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.2.8 Malformed SIP Request-URI (embedded LWS) This INVITE has illegal LWS within the Request-URI. An element receiving this request should respond with a 400 Bad Request. An element could attempt to ignore the embedded LWS for those schemes (like sip) where that would not introduce ambiguity. Message Details : INVITE sip:user@example.com; lr SIP/2.0 To: sip:user@example.com;tag=3xfe-9921883-z9f From: sip:caller@example.net;tag=231413434 Sparks, et al. Expires April 23, 2004 [Page 25] Internet-Draft SIP Torture Tests October 2003 Max-Forwards: 5 Call-ID: asdfasdoijweoi2323-asdfwern23-asd8ia0swn34rk423 CSeq: 2130706432 INVITE Via: SIP/2.0/UDP 192.0.2.1:5060;branch=z9hG4bKkdjuw2395 Contact: Content-Type: application/sdp Content-Length: 160 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.1 s=- c=IN IP4 192.0.2.1 t=3149328700 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.2.9 Multiple SP separating Request-Line elements This INVITE has illegal multiple SP characters between elements of the start line. It is acceptable to reject this request as malformed. An element that is liberal in what it accepts may ignore these extra SP characters while processing the request. If the element forwards the request, it must not include these extra SP characters in the messages it sends. Message Details : INVITE sip:user@example.com SIP/2.0 Max-Forwards: 8 To: sip:user@example.com From: sip:caller@example.net;tag=8814 Call-ID: 2304u0qwsdfknq234oi243099adsdfnawe3@example.com CSeq: 1893884 INVITE Via: SIP/2.0/UDP host1.example.com;branch=z9hG4bKkdjuw3923 Contact: Content-Type: application/sdp Content-Length: 151 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.1 s=- c=IN IP4 192.0.2.1 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 Sparks, et al. Expires April 23, 2004 [Page 26] Internet-Draft SIP Torture Tests October 2003 a=rtpmap:31 LPC 3.1.2.10 SP characters at end of Request-Line This OPTIONS request contains SP characters between the SIP-Version field and the CRLF terminating the Request-Line. It is acceptable to reject this request as malformed. An element that is liberal in what it accepts may ignore these extra SP characters while processing the request. If the element forwards the request, it must not include these extra SP characters in the messages it sends. Message Details : OPTIONS sip:remote-target@example.com SIP/2.02020 Via: SIP/2.0/TCP host1.examle.com;branch=z9hG4bK299342093 To: From: ;tag=329429089 Call-ID: afewroicu34958239neffasdhr2345r Accept: application/sdp CSeq: 238923 OPTIONS Max-Forwards: 70 Content-Length: 0 3.1.2.11 Escaped headers in SIP Request-URI This INVITE is malformed as the SIP Request-URI contains escaped headers. It is acceptable for an element to reject this request with a 400 Bad Request. An element could choose to be liberal in what it accepts and ignore the escaped headers. If the element is a proxy, the escaped headers must not appear in the Request-URI of forwarded request (and most certainly must not be translated into the actual header of the forwarded request). Message Details : INVITE sip:user@example.com?Route=%3Csip:example.com%3E SIP/2.0 To: sip:user@example.com From: sip:caller@example.net;tag=341518 Max-Forwards: 7 Contact: Call-ID: 23940-asdfhj-aje3br-234q098w-fawerh2q-h4n5 CSeq: 149209342 INVITE Sparks, et al. Expires April 23, 2004 [Page 27] Internet-Draft SIP Torture Tests October 2003 Via: SIP/2.0/UDP host-of-the-hour.example.com;branch=z9hG4bKkdjuw Content-Type: application/sdp Content-Length: 151 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.1 s=- c=IN IP4 192.0.2.1 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.2.12 Invalid timezone in Date header field This INVITE is invalid as it contains a non GMT time zone in the SIP Date header field. It is acceptable to reject this request as malformed (though an element shouldn't do that unless the contents of the Date header field were actually important to its processing). An element wishing to be liberal in what it accepts could ignore this value altogether if it wasn't going to use the Date header field anyhow. Otherwise, it could attempt to interpret this date and adjust it to GMT. RFC 3261 explicitly defines the only acceptable timezone designation as "GMT". "UT", while synonymous with GMT per [RFC2822], is not valid. "UTC" and "UCT" are also invalid. Message Details : INVITE sip:user@example.com SIP/2.0 To: sip:user@example.com From: sip:caller@example.net;tag=2234923 Max-Forwards: 70 Call-ID: 239423mnsadf3j23lj42--sedfnm234 CSeq: 1392934 INVITE Via: SIP/2.0/UDP host.example.com;branch=z9hG4bKkdjuw Date: Fri, 01 Jan 2010 16:00:00 EST Contact: Content-Type: application/sdp Content-Length: 151 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.5 s=- c=IN IP4 192.0.2.5 Sparks, et al. Expires April 23, 2004 [Page 28] Internet-Draft SIP Torture Tests October 2003 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.1.2.13 Failure to enclose name-addr URI in <> This REGISTER request is malformed. The SIP URI contained in the Contact Header field has an escaped header, so the field must be in name-addr form (which implies the URI must be enclosed in <>). It is reasonable for an element receiving this request to respond with a 400 Bad Request. An element choosing to be liberal in what it accepts could infer the angle brackets since there is no ambiguity in this example. In general, that won't be possible. Message Details : REGISTER sip:example.com SIP/2.0 To: sip:user@example.com From: sip:user@example.com;tag=998332 Max-Forwards: 70 Call-ID: k345asrl3fdbv@10.0.0.1 CSeq: 1 REGISTER Via: SIP/2.0/UDP 135.180.130.133:5060;branch=z9hG4bKkdjuw Contact: sip:user@example.com?Route=%3Csip:sip.example.com%3E l: 0 3.1.2.14 Spaces within addr-spec This request is malformed since the addr-spec in the To header field contains spaces. Parsers receiving this request must not break. It is reasonable to reject this request with a 400 Bad Request response. Elements attempting to be liberal may ignore the spaces. Message Details : OPTIONS sip:user@example.org SIP/2.0 Via: SIP/2.0/UDP host4.example.com:5060;branch=z9hG4bKkdju43234 Max-Forwards: 70 From: "Bell, Alexander" ;tag=433423 To: "Watson, Thomas" < sip:t.watson@example.org > Call-ID: sdf0234n2nds0a099u23h3hnnw009cdkne3 Accept: application/sdp CSeq: 3923239 OPTIONS l: 0 Sparks, et al. Expires April 23, 2004 [Page 29] Internet-Draft SIP Torture Tests October 2003 3.1.2.15 Non-token characters in display-name This OPTIONS request is malformed since the display names in the To and From header fields contain non-token characters but are unquoted. It is reasonable to always reject this kind of error with a 400 Bad Request response. An element may attempt to be liberal in what it receives and infer the missing quotes. If this element were a proxy, it must not propagate the error into the request it forwards. As a consequence, if the fields are covered by a signature, there's not much point in trying to be liberal - the message should be simply rejected. Message Details : OPTIONS sip:t.watson@example.org SIP/2.0 Via: SIP/2.0/UDP c.example.com:5060;branch=z9hG4bKkdjuw Max-Forwards: 70 From: Bell, Alexander ;tag=43 To: Watson, Thomas Call-ID: 31415@c.example.com Accept: application/sdp CSeq: 3923239 OPTIONS l: 0 3.1.2.16 Unknown protocol version To an element implementing [RFC3261], this request is malformed due to its high version number. The element should respond to the request with a 505 Version Not Supported error. Message Details : OPTIONS sip:t.watson@example.org SIP/7.0 Via: SIP/7.0/UDP c.example.com;branch=z9hG4bKkdjuw Max-Forwards: 70 From: A. Bell ;tag=qweoiqpe To: T. Watson Call-ID: 31417@c.example.com CSeq: 1 OPTIONS l: 0 Sparks, et al. Expires April 23, 2004 [Page 30] Internet-Draft SIP Torture Tests October 2003 3.1.2.17 Start line and CSeq method mismatch This request has mismatching values for the method in the start line and the CSeq header field. Any element receiving this request will respond with a 400 Bad Request. Message Details : OPTIONS sip:user@example.com SIP/2.0 To: sip:j.user@example.com From: sip:caller@example.net;tag=34525 Max-Forwards: 6 Call-ID: 0ha0isndaksdj0234sxdfl3 CSeq: 8 INVITE Via: SIP/2.0/UDP host.example.com;branch=z9hG4bKkdjuw l: 0 3.1.2.18 Unknown Method with CSeq method mismatch This message has an unknown method, and a CSeq method tag which does not match it. Any element receiving this response will should respond with a 501 Not Implemented. A 400 Bad Request is also acceptable, but choosing a 501 (particularly at proxies) has better future-proof characteristics. Message Details : NEWMETHOD sip:user@example.com SIP/2.0 To: sip:j.user@example.com From: sip:caller@example.net;tag=34525 Max-Forwards: 6 Call-ID: 0ha0isndaksdj0234sxdfl3 CSeq: 8 INVITE Contact: Via: SIP/2.0/UDP host.example.net;branch=z9hG4bKkdjuw Content-Type: application/sdp l: 139 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.1 c=IN IP4 192.0.2.1 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC Sparks, et al. Expires April 23, 2004 [Page 31] Internet-Draft SIP Torture Tests October 2003 3.1.2.19 Overlarge response code This response has a response code larger than 699. An element receiving this response should simply drop it. Message Details : SIP/2.0 4294967301 better not break the receiver Via: SIP/2.0/UDP 192.0.2.105;branch=z9hG4bK2398ndaoe Call-ID: asdof3uj203asdnf3429uasdhfas3ehjasdfas9i CSeq: 353494 INVITE From: ;tag=39ansfi3 To: ;tag=902jndnke3 Content-Length: 0 Contact: 3.2 Transaction layer semantics This section contains tests that exercise an implementation's parser and transaction layer logic. 3.2.1 Missing transaction identifier This request indicates support for RFC 3261-style transaction identifiers by providing the z9hG4bK prefix to the branch parameter, but it provides no identifier. A parser must not break when receiving this message. An element receiving this request could reject the request with a 400 Response (preferably statelessly, as other requests from the source are likely to also have a malformed branch parameter), or it could fall back to the RFC 2543 style transaction identifier. Message Details : OPTIONS sip:user@example.com SIP/2.0 To: sip:user@example.com From: sip:caller@example.org;tag=33242 Max-Forwards: 3 Via: SIP/2.0/UDP 192.0.2.1;branch=z9hG4bK Accept: application/sdp Call-ID: sadonfo23i420jv0as0derf3j3n CSeq: 8 OPTIONS l: 0 Sparks, et al. Expires April 23, 2004 [Page 32] Internet-Draft SIP Torture Tests October 2003 3.3 Application layer semantics This section contains tests that exercise an implementation's parser and application layer logic. 3.3.1 Missing Required Header Fields This request contains no Call-ID, From, or To header fields. An element receiving this message must not break because of the missing information. Ideally, it will respond with a 400 Bad Request error. Message Details : INVITE sip:user@example.com SIP/2.0 CSeq: 193942 INVITE Via: SIP/2.0/UDP 192.0.2.95;branch=z9hG4bKkdjuw Content-Type: application/sdp l: 153 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.95 s=- c=IN IP4 192.0.2.95 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.3.2 Request-URI with unknown scheme This OPTIONS contains an unknown URI scheme in the Request-URI. A parser must accept this as a well-formed SIP request. An element receiving this request will reject it with a 416 Unsupported URI Scheme response. Some early implementations attempt to look at the contents of the To header field to determine how to route this kind of request. That is an error. Despite the fact that the To header field and the Request URI frequently look alike in simplistic first-hop messages, the To header field contains no routing information. Message Details : OPTIONS nobodyKnowsThisScheme:totallyopaquecontent SIP/2.0 Sparks, et al. Expires April 23, 2004 [Page 33] Internet-Draft SIP Torture Tests October 2003 To: sip:user@example.com From: sip:caller@example.net;tag=384 Max-Forwards: 3 Call-ID: 2340923nasdfasser0q239nwsdfasdkl34 CSeq: 3923423 OPTIONS Via: SIP/2.0/TCP host9.example.com;branch=z9hG4bKkdjuw39234 Content-Length: 0 3.3.3 Request-URI with known but atypical scheme This OPTIONS contains an Request-URI with an IANA registered scheme that does not commonly appear Request-URIs of SIP requests. A parser must accept this as a well-formed SIP request. If an element will never accept this scheme as meaningful in a request-URI, it is appropriate to treat it as unknown and return a 416 Unsupported URI Scheme response. If the element might accept some URIs with this scheme, then a 404 Not Found is appropriate for those URIs it doesn't accept. Message Details : OPTIONS soap.beep://192.0.2.103:3002 SIP/2.0 To: sip:user@example.com From: sip:caller@example.net;tag=384 Max-Forwards: 3 Call-ID: 2340923nasdfasser0q239nwsdfasdkl34 CSeq: 3923423 OPTIONS Via: SIP/2.0/TCP host9.example.com;branch=z9hG4bKkdjuw39234 Content-Length: 0 3.3.4 Unknown URI schemes in header fields This message contains registered schemes in the To, From and Contact header fields of a request. The message is syntactically valid. Parsers must not fail when receiving this message. Proxies should treat this message as they would any other request for this URI. A registrar would reject this request with a 400 Bad Request response since the To: header field is required to contain a SIP or SIPS URI as an AOR. Message Details : REGISTER sip:example.com SIP/2.0 Sparks, et al. Expires April 23, 2004 [Page 34] Internet-Draft SIP Torture Tests October 2003 To: isbn:2983792873 From: ;tag=3234233 Call-ID: 0ha0isndaksdj@hyphenated-host.example.com CSeq: 234902 REGISTER Max-Forward: 70 Via: SIP/2.0/UDP 192.0.2.21:5060;branch=z9hG4bKkdjuw Contact: l: 0 3.3.5 Proxy-Require and Require This request tests proper implementation of SIP's Proxy-Require and Require extension mechanisms. Any element receiving this request will respond with a 420 Bad Extension response containing an Unsupported header field listing these features from either the Require or Proxy-Require header field depending on the role in which the element is responding. Message Details : OPTIONS sip:user@example.com SIP/2.0 To: sip:j_user@example.com From: sip:caller@example.net;tag=242etr Max-Forward: 6 Call-ID: 0ha0isndaksdj Require: nothingSupportsThis, nothingSupportsThisEither Proxy-Require: noProxiesSupportThis, norDoAnyProxiesSupportThis CSeq: 8 OPTIONS Via: SIP/2.0/TLS fold-and-staple.example.com;branch=z9hG4bKkdjuw Content-Length: 0 3.3.6 Unknown Content-Type This INVITE request contains a body of unknown type. It is syntactically valid. A parser must not fail when receiving it. A proxy receiving this request would process it just like any other INVITE. An endpoint receiving this request would reject it with a 415 Unsupported Media Type error. Message Details : INVITE sip:user@example.com SIP/2.0 Contact: Sparks, et al. Expires April 23, 2004 [Page 35] Internet-Draft SIP Torture Tests October 2003 To: sip:j.user@example.com From: sip:caller@example.net;tag=8392034 Max-Forwards: 70 Call-ID: 0ha0isndaksdjadsfij34n23d CSeq: 235448 INVITE Via: SIP/2.0/UDP somehost.example.com;branch=z9hG4bKkdjuw Content-Type: application/unknownformat Content-Length: 40 3.3.7 Unknown authorization scheme This REGISTER request contains an Authorization header field with an unknown scheme. The request is well-formed. A parser must not fail when receiving it. A proxy will treat this request as any other REGISTER. If it forwards the request, it will include this Authorization header field unmodified in the forwarded messages. A registrar that does not care about challenge-response authentication will simply ignore the Authorization header field, processing this registration as if the field were not present. A registrar that does care about challenge-response authentication will reject this request with a 401, issuing a new challenge with a scheme it understands. Endpoints choosing not to act as registrars will simply reject the request. A 405 Method Not Allowed is appropriate. Message Details : REGISTER sip:example.com SIP/2.0 To: sip:j.user@example.com From: sip:j.user@example.com;tag=87321hj23128 Max-Forwards: 8 Call-ID: 0ha0isndaksdj CSeq: 9338 REGISTER Via: SIP/2.0/TCP 192.0.2.253;branch=z9hG4bKkdjuw Authorization: NoOneKnowsThisScheme opaque data here Content-Length:0 Sparks, et al. Expires April 23, 2004 [Page 36] Internet-Draft SIP Torture Tests October 2003 3.3.8 Multiple values in single value required fields The message contains a request with multiple Call-ID, To, From, Max-Forwards and CSeq values. An element receiving this request must not break. An element receiving this request would respond with a 400 Bad Request error. Message Details : INVITE sip:user@company.com SIP/2.0 Contact: Via: SIP/2.0/UDP 192.0.2.25;branch=z9hG4bKkdjuw Max-Forwards: 70 CSeq: 5 INVITE Call-ID: 98asdh@192.0.2.1 CSeq: 59 INVITE Call-ID: 98asdh@192.0.2.2 From: sip:caller@example.com;tag=3413415 To: sip:user@example.com To: sip:other@example.net From: sip:caller@example.net;tag=2923420123 Content-Type: application/sdp l: 155 Contact: Max-Forwards: 5 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.25 s=- c=IN IP4 192.0.2.25 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.3.9 Multiple Content-Length values Multiple conflicting Content-Length header field values appear in this request. From a framing perspective, this situation is equivalent to an invalid Content-Length value (or no value at all). An element receiving this message should respond with an error. This Sparks, et al. Expires April 23, 2004 [Page 37] Internet-Draft SIP Torture Tests October 2003 request appeared over UDP, so the remainder of the datagram can simply be discarded. If a request like this arrives over TCP, the framing error is not recoverable and the connection should be closed. Message Details : OPTIONS sip:user@example.com SIP/2.0 Via: SIP/2.0/UDP host5.example.net;branch=z9hG4bK293423 To: sip:user@example.com From: sip:other@example.net;tag=3923942 Call-ID: 234asdfhn2323orihawfdoa3o4r52o3irsdf CSeq: 15932 OPTIONS Content-Length: 13 Max-Forwards: 60 Content-Length: 5 Content-Type: text/plain There's no way to know how many octets are supposed to be here. 3.3.10 200 OK Response with broadcast Via header field value This message is a response with a 2nd Via header field value's sent-by containing 255.255.255.255. The message is well formed - parsers must not fail when receiving it. Per [RFC3261] an endpoint receiving this message should simply discard it. If a proxy followed normal response processing rules blindly, it would forward this response to the broadcast address. To protect against this being used as an avenue of attack, proxies should drop such responses. Message Details : SIP/2.0 200 OK Via: SIP/2.0/UDP 192.0.2.198;branch=z9hG4bK1324923 Via: SIP/2.0/UDP 255.255.255.255;branch=z9hG4bK1saber23 Call-ID: 0384840201234ksdfak3j2erwedfsASdf CSeq: 35 INVITE From: sip:user@example.com;tag=11141343 To: sip:user@example.edu;tag=2229 Content-Length: 159 Content-Type: application/sdp Contact: Sparks, et al. Expires April 23, 2004 [Page 38] Internet-Draft SIP Torture Tests October 2003 v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.198 s=- c=IN IP4 192.0.2.198/127 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC 3.3.11 Max-Forwards of zero This is a legal SIP request with the Max-Forwards header field value set to zero. A proxy should not forward the request and respond 483 (Too Many Hops). An endpoint should process the request as if the Max-Forwards field value were still positive. Message Details : OPTIONS sip:user@example.com SIP/2.0 To: sip:user@example.com From: sip:caller@example.net;tag=3ghsd41 Call-ID: 2304sadjfasdlfnm2o2l43r5u0asdfas CSeq: 39234321 OPTIONS Via: SIP/2.0/UDP host1.example.com;branch=z9hG4bKkdjuw2349i Max-Forwards: 0 Content-Length: 0 3.3.12 REGISTER with a contact header parameter This register request contains a contact where the 'unknownparam' parameter must be interpreted as being a contact-param and not a url-param. This REGISTER should succeed. The response must not include "unknownparam" as a url-parameter for this binding. Likewise, "unknownparam" must not appear as part of the binding during subsequent fetches. Behavior is the same, of course, for any known contact-param parameter names. Message Details : Sparks, et al. Expires April 23, 2004 [Page 39] Internet-Draft SIP Torture Tests October 2003 REGISTER sip:example.com SIP/2.0 Via: SIP/2.0/UDP saturn.example.com:5060;branch=z9hG4bKkdjuw Max-Forwards: 70 From: sip:watson@example.com;tag=DkfVgjkrtMwaerKKpe To: sip:watson@example.com Call-ID: 70710@saturn.example.com CSeq: 2 REGISTER Contact: sip:+19725552222@gw1.example.net;unknownparam l: 0 3.3.13 REGISTER with a url parameter This register request contains a contact where the URI has an unknown parameter. The register should succeed and a subsequent retrieval of the registration must include "unknownparam" as a url-parameter. Behavior is the same, of course, for any known url-parameter names. Message Details : REGISTER sip:example.com SIP/2.0 Via: SIP/2.0/UDP saturn.example.com:5060;branch=z9hG4bKkdjuw Max-Forwards: 70 From: sip:watson@example.com;tag=838293 To: sip:watson@example.com Call-ID: 70710@saturn.example.com CSeq: 3 REGISTER Contact: l: 0 3.3.14 REGISTER with a url escaped header This register request contains a contact where the URI has an escaped header. The register should succeed and a subsequent retrieval of the registration must include the escaped Route header in the contact URI for this binding. Message Details : REGISTER sip:example.com SIP/2.0 Sparks, et al. Expires April 23, 2004 [Page 40] Internet-Draft SIP Torture Tests October 2003 To: sip:user@example.com From: sip:user@example.com;tag=8 Max-Forwards: 70 Call-ID: k345asrl3fdbv@192.0.2.1 CSeq: 14398234 REGISTER Via: SIP/2.0/UDP host5.example.com;branch=z9hG4bKkdjuw M: L:0 3.3.15 Unacceptable Accept offering This request indicates the response must contain a body in an unknown type. In particular, since the Accept header field does not contain application/sdp, the response may not contain an SDP body. The recipient of this request could respond with a 406 Not Acceptable with a Warning/399 indicating that a response cannot be formulated in the formats offered in the Accept header field. It is also appropriate to respond with a 400 Bad Request since all SIP UAs supporting INVITE are required to support application/sdp. Message Details : INVITE sip:user@example.com SIP/2.0 To: sip:j_user@example.com Contact: From: sip:caller@example.net;tag=234 Max-Forwards: 5 Call-ID: 0ha0isndaksdj9342dasdd Accept: text/nobodyKnowsThis CSeq: 8 INVITE Via: SIP/2.0/UDP 192.0.2.15;branch=z9hG4bKkdjuw Content-Length: 151 Content-Type: application/sdp v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.5 s=- c=IN IP4 192.0.2.5 t=0 0 m=audio 492170 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC Sparks, et al. Expires April 23, 2004 [Page 41] Internet-Draft SIP Torture Tests October 2003 3.4 Backward compatibility 3.4.1 INVITE with RFC2543 syntax This is a legal message per RFC 2543 (and several bis versions) which should be accepted by RFC 3261 elements which want to maintain backwards compatibility. o There is no branch parameter at all on the Via header field value o There is no From tag o There is no explicit Content-Length (The body is assumed to be all octets in the datagram after the null-line) o There is no Max-Forwards header field Message Details : INVITE sip:UserB@example.com SIP/2.0 Via: SIP/2.0/UDP iftgw.example.com From: Record-Route: To: sip:+16505552222@ss1.example.net;user=phone Call-ID: 1717@ift.client.example.com CSeq: 56 INVITE Content-Type: application/sdp v=0 o=mhandley 29739 7272939 IN IP4 192.0.2.5 s=- c=IN IP4 192.0.2.5 t=0 0 m=audio 492170 RTP/AVP 0 4. Security Considerations This document presents NON NORMATIVE examples of SIP session establishment. The security considerations in [RFC3261] apply. Parsers must carefully consider edge conditions and malicious input as part of their design. Attacks on many Internet systems use crafted input to cause implementations to behave in undesirable ways. Many of the messages in this draft are designed to stress a parser implementation at points traditionally used for such attacks. This document does not, however, attempt to be comprehensive. It should be Sparks, et al. Expires April 23, 2004 [Page 42] Internet-Draft SIP Torture Tests October 2003 considered a seed to stimulate thinking and planning, not simply a set of tests to be passed. 5. Open Issues and Remaining Work 1. All of the messages in this document should be considered new. They are either new additions or major revisions of the previous versions. They all need to be carefully reviewed by the working group 2. Are the header field values in Section 3.1.1.7 long enough? Should we push each field over 256 octets or even longer? Where is the threshold of reason? 3. Is this really possible to recover from embedded whitespace in a SIP Request-URI as suggested in Section 3.1.2.8? 4. Can we modify the example in Section 3.1.2.15 such that it is not obvious where to infer quotes? 5. Can we modify the example in Section 3.1.2.13 such that it is not obvious (due to ambiguity perhaps) where to infer angle brackets? 6. Is the message at Section 3.3.11 sufficiently tortuous to include in this document? 6. Acknowledgments The authors wish to thank the following individuals for their participation in the review of earlier versions of this document: Aseem Agarwal, Rafi Assadi, Gonzalo Camarillo, Ben Campbell, Cullen Jennings, Vijay Gurbani, Sunitha Kumar, Rohan Mahy, Jon Peterson, Marc Petit-Huguenin, Vidhi Rastogi, Adam Roach, Bodgey Yin Shaohua and Tom Taylor. Thanks to Neil Deason for contributing several messages and Kundan Singh for performing parser validation of messages in earlier versions.. The following individuals provided significant comments during the early phases of the development of this document: Jean-Francois Mule, Hemant Agrawal, Henry Sinnreich, David Devanatham, Joe Pizzimenti, Matt Cannon, John Hearty, the whole MCI WorldCom IPOP Design team, Scott Orton, Greg Osterhout, Pat Sollee, Doug Weisenberg, Danny Mistry, Steve McKinnon, and Denise Ingram, Denise Caballero, Tom Redman, Ilya Slain, Pat Sollee, John Truetken, and others from MCI WorldCom, 3Com, Cisco, Lucent and Nortel. Sparks, et al. Expires April 23, 2004 [Page 43] Internet-Draft SIP Torture Tests October 2003 Informative References [RFC2396] Berners-Lee, T., Fielding, R. and L. Masinter, "Uniform Resource Identifiers (URI): Generic Syntax", RFC 2396, August 1998. [RFC2822] Resnick, P., "Internet Message Format", RFC 2822, April 2001. [RFC3261] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M. and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261, June 2002. [RFC3264] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model with Session Description Protocol (SDP)", RFC 3264, June 2002. Authors' Addresses Robert J. Sparks (editor) dynamicsoft 5100 Tennyson Parkway Suite 1200 Plano, TX 75024 EMail: rsparks@dynamicsoft.com Alan Hawrylyshen Jasomi Networks 2033 Gateway Place Suite 500 San Jose, CA 95110 EMail: alan@jasomi.com Alan Johnston MCI 100 South 4th Street St. Louis, MO 63102 EMail: alan.johnston@mci.com Sparks, et al. Expires April 23, 2004 [Page 44] Internet-Draft SIP Torture Tests October 2003 Jonathan Rosenberg dynamicsoft 600 Lanidex Plaza Parsippany, NJ 07052 Phone: +1 973 952 5000 EMail: jdrosen@dynamicsoft.com URI: http://www.jdrosen.net Henning Schulzrinne Columbia University Department of Computer Science 1214 Amsterdam Ave. New York, NY 10027 USA EMail: schulzrinne@cs.columbia.edu Appendix A. Bit-exact archive of each test message The following text block is an encoded, gzip compressed TAR archive of files that represent each of the example messages discussed in Section 3. To recover the compressed archive file intact, the text of this document may be passed as input to the following Perl script (the output should be redirected to a file or piped to "tar -xzvf -"). #!/usr/bin/perl use strict; my $bdata = ""; use MIME::Base64; while(<>) { if (/-- BEGIN MESSAGE ARCHIVE --/ .. /-- END MESSAGE ARCHIVE --/) { if ( m/^\s*[^\s]+\s*$/) { $bdata = $bdata . $_; } } } print decode_base64($bdata); Figure 58 Alternatively, the base-64 encoded block can be edited by hand to remove document structure lines and fed as input to any base-64 decoding utility. Sparks, et al. Expires April 23, 2004 [Page 45] Internet-Draft SIP Torture Tests October 2003 A.1 Encoded Reference Messages -- BEGIN MESSAGE ARCHIVE -- H4sIAANxmD8CA+xdW4/bSHbumQF2Jx00MMD+AbqxWs/YTXWxqnhTt3raY/fs 9PgyDbvtATYb2NViUaJEkWqSktwO4iTzsNm8BLPIY/IwCBIEecoGecgGCySA /MdSRd0okpLY7dbFHpat1oWHlyLr++qcU6dOnRGD+C1aKRok2FhQARIAioI3 ACtq7J0XWVI3gKpiBahAgpDJI0WSNwSwsYTS9gPiCcKGV/dbxGv40+TmbX9H yzcnp8ffPHoi+Far1Papd0hfkmbLpkXXqwpPjk92YRFsbT6zSGn4bffpvROh 5voBLg5lK26zJAMF7J15xKnUyq/02i/x2f2GUW9jBBHe2nxIXopful6XeIZf ElR2yC89tpOw/QW17R3hjs0O5RjU2xb2+ZWQYrV4xrYcRs5wsBeQahkjhCHa 2jx12c7fksB3nR3htOY2ic/2DasRFLvh7xNVOdjavEtsWzy+VxJ8wwTsqhzo GD4gQNfbENVQzXG6AOgVo+FQdoI7lQptBSWBtFq2VSGB5Tq7vtFih3lCz0sC 0iGrmS4M7t/Wpl0SWK3eued/Roz+Q1sgAczDP1JxHP+qAnL8rxT/DHFj/HO0 pUkMYcy3VRi8JvkjBCxCEMM4AaAUSpF09qkIi1KMRWZBcYRoYriO6UJkYQjq HUB8wMjERHXkDAGrxaH6DoJ1MfhnwKeL7P7n4V8CrLOP4R8jKcf/Msrxo2fH p0fXD3+HBiH8Ietodd5hJzWAEXpZP8r69KbDUMwgC5Fdx1AUfWqYTjPUHvoI llifqyMs9C95ilIS1UlS1JHu1uY91txLwpeetSMASfiaOAJkTVCQlBIA7L9w 9OSUndF1AlJhnLMfqRs/vlyM1PCgL0idQDy9aNE0hhpsfkCdalBjdZAlzjyd Mqu/W27WmNJj0wsB6irTJVSosgrqrILC8QkeEaK8temXxa3NSjm5ISgDzmXN MmkbliuwWy2pQHh8erJ759mJwGoF+caOZVBXQBCqo02IXQcpe0GrSVolJAkP Tu7mhPgj5X9noeyfwf4DCf6XYK7/LV3/SzWcJm1AXqKUW8liA3bj7B+WsRHI SswMnG8F9julsExagf1d06oSNQGRhCX5cOLq55p8rLwvVt8E/i2nA6RV+n9U Bva4/iejHP9rp//Vi1fQANnDlBQJKxLESkINjEAS1AiwfMcgDd+oE5+pgtxH Q/yxATdV8RuZjvLe3s7ezk5Ef9v+2qUDp1LdpRN0sMdKmoaG5mp1l1TgpKka nLRyFY7hv0M9f5X2H+DGXhz/Ks7xvzb9v5ro/9W0/j9r1z/R898php3/vB7/ vEtd67xFI/3+aXHQ9Wfv8tV4lz/q2aX3qE+/FP4rhBnNK9X/2VYUwT8K9X+k 5vhfRhl0owIEQPjm/qy+Vddi+JYQ7Lt2EvtAWS5GXvH9fHJGPb7juO9HGtYw gPzxY9b/m6SB6pB6XWqY/p0nhjkadpFHWsBY8YgrJX21Q2J4R0NDISFGjfbA PwX1NCVAz+TaGbuIwoNzBxHUogxzcHllQdemagu6titBNff65OX6+J++DBZr /WXw/yhJ/s/H/5av/2UwAJ9fZQgAQxp4E4pgSVCmWX5bm4/pedvyGOU6blCz nOqTdqvleoF/WrP8nbQfj6ygRtkJTjz35YUY2Z3/YFF/IDvc37vn3nEukttS RgonerbTB08E07UNkdG4yFpN2I3M037jPcu6aZZnVrXiGisd/wMywHH8Y5zb f0vV/zDUsa6oCEjCGQ0C6nGgCWceJQ2BoUvwaIVaHY6y6RoiiGt6EOkag7VL I2AnvuGaqF2HALGPjonYmdvsU80kPqK10PNDfN0aa3wI6zim9e2n0VXfUEQ6 cXzTGuh9+2mKX19QB7DuGE6DolSUTlHvWCUT+t27/PwrjLG9FY//qLKc7P9z +299/L+TLhztbT3COh/vZ39cOG2gve1UvYv4SHuqutClFmF8YTRQBj/x5AB+ ss8W+fgOFiGSIbr00L7OyhVcwzN8w8twDldYoybN1Y7/YBUk+n9ZyfG/jPL4 6JfHT06PHod4TQV/AkU+Cdqec6WB37Hnl58u5q8dem7uNcxn1XrDCx52CfXu 3x86fdN3iRCDClQJHCYvb8gMUBjWNsI7/Ki3JV2FsixDVg6rXSnKPHttp+G4 XSfEyfsXOzjAP1wp/hnY4/hX8vHfHyv+NaSxrvKaMI/SML9/KdAfvM8Rw8aZ 7dHzlfr/eIBAHP8I5vG/a4L/bKp+cusgUAvKUh3VEUxMAtK2No9jyryuc+Pf dGxkNyBizQLGOurBWeKBvmPVfwz26W4KKKdRVRinnOoJ4P8iZlI0jGTiRg2v cXJ7lggZzBp82v1Jmjy6yoCDdY4f+TAaRXKZGJmU2iMN9COtFx/OfA3RMEJm iycf3ZpTqF9Z9PDP/PF/BGP8D/P5X8v3/7CXX0B3OMMWMIhQWJSwkv1CQZV9 WlBhGumFitZxATL+6lD2xm5hhfrR4w18sUhL0J+6tWn154YAPXQKN+oNByLX YV+AiCITQyCfEoqzun0466YP1cwY5N/aFEYeqoJyN20yyB77nd2GPaegSE1a 7rA3u80qLRcQLiDp4JrYcyp55mEBebka/8MV+/8VRUrwv5rz/5L0/wJWmcpc Sparks, et al. 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Expires April 23, 2004 [Page 49] Internet-Draft SIP Torture Tests October 2003 AQA= -- END MESSAGE ARCHIVE -- Sparks, et al. Expires April 23, 2004 [Page 50] Internet-Draft SIP Torture Tests October 2003 Intellectual Property Statement The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claims of rights made available for publication and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementors or users of this specification can be obtained from the IETF Secretariat. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights which may cover technology that may be required to practice this standard. Please address the information to the IETF Executive Director. Full Copyright Statement Copyright (C) The Internet Society (2003). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assignees. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION Sparks, et al. Expires April 23, 2004 [Page 51] Internet-Draft SIP Torture Tests October 2003 HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Sparks, et al. Expires April 23, 2004 [Page 52]