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SDP attributes defined in RFC 7006

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Miscellaneous Capabilities Negotiation
bcap,  ccap,  icap

  see also:
   [ csup  creq  acap  tcap  pcfg  acfg ]
   [ rmcap  omcap  mfcap  mscap  lcfg  sescap ]

RFC 7006 – Section 3.1

a=bcap:   (session- or media-level)
a=ccap:   (session- or media-level)
a=icap:   (session- or media-level)


attribute   =/
bcap-attr   =
"bcap:"   bw-cap-num   1*WSP   bwtype   ":"   bandwidth

bw-cap-num   =
1*10( DIGIT )

ccap-attr   =
"ccap:"   conn-cap-num   1*WSP   nettype   SP   addrtype   SP   connection-address

conn-cap-num   =
1*10( DIGIT )
;  1 to 2^31-1, inclusive

icap-attr   =
"icap:"   title-cap-num 1*WSP   text

title-cap-num   =
1*10( DIGIT )