RFC 6086, "Session Initiation Protocol (SIP) INFO Method and Package Framework", January 2011

Errata ID: 3167
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Dale Worley
Date Reported: 2012-03-26
Held for Document Update by: Robert Sparks

Section 12.2.2 says:

12.2.2.1.  Non-Info Package Body Part

   INFO sip:alice@pc33.example.com SIP/2.0
   Via: SIP/2.0/UDP 192.0.2.2:5060;branch=z9hG4bKnabcdef
   To: Alice <sip:alice@example.net>;tag=1234567
   From: Bob <sip:bob@example.com>;tag=abcdefg
   Call-Id: a84b4c76e66710@pc33.example.com
   CSeq: 314400 INFO
   Info-Package: foo
   Content-Type: multipart/mixed;boundary="theboundary"
   Content-Length: ...

   --theboundary
   Content-Type: application/mumble
   ...

   <mumble stuff>

   --theboundary
   Content-Type: application/foo-x
   Content-Disposition: Info-Package
>>>Content-length: 59

   I am a foo-x message type, and I belong to Info Package foo
   --theboundary--

12.2.2.2.  Info Package with Multiple Body Parts inside Multipart Body
           Part

   INFO sip:alice@pc33.example.com SIP/2.0
   Via: SIP/2.0/UDP 192.0.2.2:5060;branch=z9hG4bKnabcdef
   To: Alice <sip:alice@example.net>;tag=1234567
   From: Bob <sip:bob@example.com>;tag=abcdefg
   Call-Id: a84b4c76e66710@pc33.example.com
   CSeq: 314423 INFO
   Info-Package: foo
   Content-Type: multipart/mixed;boundary="theboundary"
   Content-Disposition: Info-Package
   Content-Length: ...

   --theboundary
   Content-Type: application/foo-x
>>>Content-length: 59

   I am a foo-x message type, and I belong to Info Package foo

   <mumble stuff>

   --theboundary
   Content-Type: application/foo-y
>>>Content-length: 59

   I am a foo-y message type, and I belong to Info Package foo
   --theboundary--

12.2.2.3.  Info Package with Single Body Part inside Multipart Body Part

   INFO sip:alice@pc33.example.com SIP/2.0
   Via: SIP/2.0/UDP 192.0.2.2:5060;branch=z9hG4bKnabcdef
   To: Alice <sip:alice@example.net>;tag=1234567
   From: Bob <sip:bob@example.com>;tag=abcdefg
   Call-Id: a84b4c76e66710@pc33.example.com
   CSeq: 314423 INFO
   Info-Package: foo
   Content-Type: multipart/mixed;boundary="theboundary"
   Content-Disposition: Info-Package
   Content-Length: ...

   --theboundary
   Content-Type: application/foo-x
   Content-Disposition: icon
>>>Content-length: 59

   I am a foo-x message type, and I belong to Info Package foo
   --theboundary--

It should say:

12.2.2.1.  Non-Info Package Body Part

   INFO sip:alice@pc33.example.com SIP/2.0
   Via: SIP/2.0/UDP 192.0.2.2:5060;branch=z9hG4bKnabcdef
   To: Alice <sip:alice@example.net>;tag=1234567
   From: Bob <sip:bob@example.com>;tag=abcdefg
   Call-Id: a84b4c76e66710@pc33.example.com
   CSeq: 314400 INFO
   Info-Package: foo
   Content-Type: multipart/mixed;boundary="theboundary"
   Content-Length: ...

   --theboundary
   Content-Type: application/mumble
   ...

   <mumble stuff>

   --theboundary
   Content-Type: application/foo-x
   Content-Disposition: Info-Package

   I am a foo-x message type, and I belong to Info Package foo
   --theboundary--

12.2.2.2.  Info Package with Multiple Body Parts inside Multipart Body
           Part

   INFO sip:alice@pc33.example.com SIP/2.0
   Via: SIP/2.0/UDP 192.0.2.2:5060;branch=z9hG4bKnabcdef
   To: Alice <sip:alice@example.net>;tag=1234567
   From: Bob <sip:bob@example.com>;tag=abcdefg
   Call-Id: a84b4c76e66710@pc33.example.com
   CSeq: 314423 INFO
   Info-Package: foo
   Content-Type: multipart/mixed;boundary="theboundary"
   Content-Disposition: Info-Package
   Content-Length: ...

   --theboundary
   Content-Type: application/foo-x

   I am a foo-x message type, and I belong to Info Package foo

   <mumble stuff>

   --theboundary
   Content-Type: application/foo-y

   I am a foo-y message type, and I belong to Info Package foo
   --theboundary--

12.2.2.3.  Info Package with Single Body Part inside Multipart Body Part

   INFO sip:alice@pc33.example.com SIP/2.0
   Via: SIP/2.0/UDP 192.0.2.2:5060;branch=z9hG4bKnabcdef
   To: Alice <sip:alice@example.net>;tag=1234567
   From: Bob <sip:bob@example.com>;tag=abcdefg
   Call-Id: a84b4c76e66710@pc33.example.com
   CSeq: 314423 INFO
   Info-Package: foo
   Content-Type: multipart/mixed;boundary="theboundary"
   Content-Disposition: Info-Package
   Content-Length: ...

   --theboundary
   Content-Type: application/foo-x
   Content-Disposition: icon

   I am a foo-x message type, and I belong to Info Package foo
   --theboundary--

Notes:

In four locations (in three examples), a Content-Length header is shown for a multipart body-part. But comparing with RFC 1521 section 7.2, Content-Length has no defined meaning within MIME, and it appears that any appearance in a body-part header must be ignored. Thus, these headers are meaningless, and the authors would probably not have included them if they had researched the subject.

(Bruno Chatras discovered this discrepancy.)

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