2.2.1.4.6 Server Multitransport Channel Data (TS_UD_SC_MULTITRANSPORT)

The TS_UD_CS_MULTITRANSPORT packet is used to indicate support for the RDP Multitransport Layer ([MS-RDPEMT] section 1.3) and to specify multitransport characteristics.


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header

flags

header (4 bytes): A GCC user data block header, as specified in User Data Header (section 2.2.1.3.1). The User Data Header type field MUST be set to SC_MULTITRANSPORT (0x0C08).

flags (4 bytes): A 32-bit, unsigned integer that specifies protocols supported by the server-side multitransport layer.

Value

Meaning

TRANSPORTTYPE_UDPFECR

0x01

RDP-UDP Forward Error Correction (FEC) reliable transport ([MS-RDPEUDP] sections 1 to 3).

TRANSPORTTYPE_UDPFECL

0x04

RDP-UDP FEC lossy transport ([MS-RDPEUDP] sections 1 to 3).<15>

TRANSPORTTYPE_UDP_PREFERRED

0x100

Indicates that tunneling of static virtual channel traffic over UDP is supported.

SOFTSYNC_TCP_TO_UDP

0x200

Indicates that switching dynamic virtual channels from the TCP to UDP transport is supported.

If the server advertises the SOFTSYNC_TCP_TO_UDP flag, then the server MUST support processing success responses in the Initiate Multitransport Response PDU (section 2.2.15.2).

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