9. Grammaire SDP

Cette section fournit la syntaxe ABNF (Augmented Backus-Naur Form, forme de Backus-Naur augmentée) de SDP. L'ABNF est définie dans la [RFC 5234].

Définition de la syntaxe SDP

; SDP Syntax
session-description = proto-version
                      origin-field
                      session-name-field
                      information-field
                      uri-field
                      email-fields
                      phone-fields
                      connection-field
                      bandwidth-fields
                      time-fields
                      key-field
                      attribute-fields
                      media-descriptions

proto-version =       %x76 "=" 1*DIGIT CRLF
                      ;this memo describes version 0

origin-field =        %x6f "=" username SP sess-id SP sess-version SP
                      nettype SP addrtype SP unicast-address CRLF

session-name-field =  %x73 "=" text CRLF

information-field =   [%x69 "=" text CRLF]

uri-field =           [%x75 "=" uri CRLF]

email-fields =        *(%x65 "=" email-address CRLF)

phone-fields =        *(%x70 "=" phone-number CRLF)

connection-field =    [%x63 "=" nettype SP addrtype SP
                      connection-address CRLF]

bandwidth-fields =    *(%x62 "=" bwtype ":" bandwidth CRLF)

time-fields =         1*( %x74 "=" start-time SP stop-time
                      *(CRLF repeat-fields) CRLF)
                      [zone-adjustments CRLF]

repeat-fields =       %x72 "=" repeat-interval SP typed-time
                      1*(SP typed-time)

zone-adjustments =    %x7a "=" time SP ["-"] typed-time
                      *(SP time SP ["-"] typed-time)

key-field =           [%x6b "=" key-type CRLF]

attribute-fields =    *(%x61 "=" attribute CRLF)

media-descriptions =  *( media-field
                      information-field
                      *connection-field
                      bandwidth-fields
                      key-field
                      attribute-fields )

media-field =         %x6d "=" media SP port ["/" integer]
                      SP proto 1*(SP fmt) CRLF

; Sub-rules
username =            non-ws-string
sess-id =             1*DIGIT
sess-version =        1*DIGIT
nettype =             token
addrtype =            token
media =               token
port =                1*DIGIT
proto =               token *("/" token)
fmt =                 token

Remarque : La définition complète de la syntaxe ABNF est très détaillée et comprend toutes les règles détaillées et les définitions des symboles terminaux pour chaque champ. Pour la syntaxe complète, veuillez consulter le document officiel RFC 4566, section 9.

Définition de la syntaxe SDP​

Définition de la syntaxe SDP