Tech-invite  3GPPspace  IETFspace
SIP ↠  Examples  Grammars  Presence ⇾
SIP  SIP‑URI  SIP Headers  SIP P‑Headers  SDP  Generic URI  ABNF Notation
Session Description  Addressing  generic rules  "a=" SDP Attributes
List   Prev   Next
SDP attributes defined in

RFC 5939 – SDP Capability Negotiation

RFC 5939 – Section 6  —  see also:  IANA
a=csup   a=creq   a=acap   a=tcap   a=pcfg   a=acfg

 

attribute  =/
csup‑attr /  creq‑attr /  acap‑attr /  tcap‑attr /  pcfg‑attr /  acfg‑attr
csup-attr =
"csup:"  option‑tag‑list
Top
creq-attr =
"creq:"  option‑tag‑list
Top
option-tag-list =
option‑tag  *( ","  option‑tag )
Up
option-tag =
token

; "cap‑v0"      see   RFC 5939
; "med‑v0"      see   RFC 6871 – Section 5.2
; "bcap‑v0",   "ccap‑v0",   "icap‑v0"      see   RFC 7006 – Section 6.2

Up
acap-attr =
"acap:"  att‑cap‑num  1*WSP  att‑par
Top
att-cap-num =
1*10( DIGIT )
Up
att-par =
attribute
Up
tcap-attr =
"tcap:"  trpr‑cap‑num  1*WSP  proto‑list
Top
trpr-cap-num =
1*10( DIGIT )
Up
proto-list =
proto  *( 1*WSP  proto )
Up
pcfg-attr =
"pcfg:"  config‑number  [ 1*WSP  pot‑cfg‑list ]
Top
config-number =
1*10( DIGIT )
Up
pot-cfg-list =
pot‑config  *( 1*WSP  pot‑config )
Up
pot-config =
attribute‑config‑list /  transport‑protocol‑config‑list /  extension‑config‑list
Up
acfg-attr =
"acfg:"  config‑number  [ 1*WSP  sel‑cfg‑list ]
Top
sel-cfg-list =
sel‑cfg  *( 1*WSP  sel‑cfg )
Up
sel-cfg =
sel‑attribute‑config /  sel‑transport‑protocol‑config /  sel‑extension‑config
Up
attribute-config-list =
"a="  delete‑attributes

attribute-config-list   =/
"a="  [ delete‑attributes  ":" ]  mo‑att‑cap‑list  *( BAR  mo‑att‑cap‑list )
Up
delete-attributes =
DELETE  ( "m" /  "s" /  "ms" )
; m: media attributes
; m: session attributes
; ms: media and session attributes
Up
mo-att-cap-list =
mandatory‑optional‑att‑cap‑list /  mandatory‑att‑cap‑list /  optional‑att‑cap‑list
Up
mandatory-optional-att-cap-list =
mandatory‑att‑cap‑list  ","  optional‑att‑cap‑list
Up
mandatory-att-cap-list =
att‑cap‑list
Up
optional-att-cap-list =
"["  att‑cap‑list  "]"
Up
att-cap-list =
att‑cap‑num  *( ","  att‑cap‑num )
Up
BAR =
"|"
Up
DELETE =
"-"
Up
transport-protocol-config-list =
"t="  trpr‑cap‑num  *( BAR  trpr‑cap‑num )
Up
extension-config-list =
[ "+" ]  ext‑cap‑name  "="  ext‑cap‑list
Up
ext-cap-name =
1*( ALPHA /  DIGIT )
Up
ext-cap-list =
1*VCHAR
Up
sel-attribute-config =
"a="  [ delete‑attributes  ":" ]  mo‑att‑cap‑list
Up
sel-transport-protocol-config =
"t="  trpr‑cap‑num
Up
sel-extension-config =
ext‑cap‑name  "="  1*VCHAR
Up

Top