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SDP attributes defined in RFC 5245

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Interactive Connectivity Establishment (ICE)
candidate,  remote-candidates, ice-lite,  ice-mismatch,  ice-ufrag,  ice-pwd,  ice-options

RFC 5245 – Section 15

Errata ID: 2338

a=candidate:   (media-level)
a=remote-candidates:   (media-level)
a=ice-lite   (session-level)
a=ice-mismatch   (media-level)
a=ice-ufrag:   (session- or media-level)
a=ice-pwd:   (session- or media-level)
a=ice-options:   (session-level)


attribute   =/
candidate-attribute   =
foundation   =
1*32ice-char

component-id   =
1*5DIGIT

transport   =
"UDP"  /     ;  see  RFC 5245
"TCP"  /     ;  see  RFC 6544 – Section 4.5
transport-extension

; See:  Registration with IANA


transport-extension   =
priority   =
1*10DIGIT

cand-type   =
"typ"   SP   candidate-types

candidate-types   =
"host"  /  "srflx"  /  "prflx"  /  "relay"  /  token

rel-addr   =
"raddr"   SP   connection-address

rel-port   =
"rport"   SP   port

extension-att-name   =
extension-att-value   =
ice-char   =
ALPHA  /  DIGIT  /  "+"  /  "/"

remote-candidate-att   =
"remote-candidates"   ":"   remote-candidate   0*( SP   remote-candidate )

remote-candidate   =
ice-lite   =
"ice-lite"

ice-mismatch   =
"ice-mismatch"

ice-pwd-att   =
"ice-pwd"   ":"   password

ice-ufrag-att   =
"ice-ufrag"   ":"   ufrag

password   =
22*256ice-char

ufrag   =
4*256ice-char

ice-options   =
"ice-options"   ":"   ice-option-tag   0*( SP   ice-option-tag )

ice-option-tag   =
tcp-type-ext   =
"tcptype"   SP   tcp-type

tcp-type   =
"active"  /  "passive"  /  "so"