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ABNF for SDP – Session Description Protocol

|   Session Description   |   v=   |   o=   |   s=   |   i=   |   u=   |   e=   |   p=   |   c=   |   b=   |   t=  r=  z=   |   k=   |   a=   |   m=   |   SDP Addressing   |   SDP generic rules   |   "a=" SDP Attributes   |

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a=ike-setup:   (session- or media-level)
a=psk-fingerprint:   (session- or media-level)


attribute   =/
ike-setup-attr   =
"ike-setup:"   role

role   =
"active"  /  "passive"  /  "actpass"

psk-fingerprint-attribute   =
"psk-fingerprint"   ":"   hash-func   SP   psk-fingerprint

hash-func   =
"sha-1"  /  "sha-224"  /  "sha-256"  /  "sha-384"  /  "sha-512"  /  token

psk-fingerprint   =
2UHEX   *( ":"   2UHEX )
;  each byte in upper-case hex, separated by colons

UHEX   =
DIGIT  /  %x41-46

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