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2.2.13.3.1 Enhanced Security Server Redirection PDU (TS_ENHANCED_SECURITY_SERVER_REDIRECTION)

The Enhanced Security Server Redirection PDU is sent by the server to the client to instruct it to reconnect to an existing session on another server. The information required to perform the reconnection is contained in an embedded Server Redirection Packet (section 2.2.13.1). This PDU MUST NOT be sent if Standard RDP Security (section 5.3) is in effect. The Standard Security Server Redirection PDU (section 2.2.13.2.1) MUST be used instead. Because this PDU can contain confidential information, it MUST always be encrypted by the External Security Protocol layer (section 5.4).


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tpktHeader

x224Data

mcsSDin (variable)

...

shareControlHeader

...

pad2Octets

serverRedirectionPDU (variable)

...

pad1Octet (optional)

tpktHeader (4 bytes): A TPKT Header, as specified in [T123] section 8.

x224Data (3 bytes): An X.224 Class 0 Data TPDU, as specified in [X224] section 13.7.

mcsSDin (variable): Variable-length PER-encoded MCS Domain PDU (DomainMCSPDU) which encapsulates an MCS Send Data Indication structure (SDin, choice 26 from DomainMCSPDU), as specified in [T125] section 11.33 (the ASN.1 structure definitions are specified in [T125] section 7, parts 7 and 10). The userData field of the MCS Send Data Indication contains a Share Control Header and the Server Redirection PDU data.

shareControlHeader (6 bytes): A Share Control Header (as specified in section 2.2.8.1.1.1.1) containing information on the packet. The type subfield of the pduType field of the Share Control Header MUST be set to PDUTYPE_SERVER_REDIR_PKT (10). The PDUVersion subfield MUST be set to zero.

pad2Octets (2 bytes): A 16-bit, unsigned integer. Padding. Values in this field MUST be ignored.

serverRedirectionPDU (variable): Information required by the client to initiate a reconnection to a given session on a target server encapsulated in a Server Redirection Packet (section 2.2.13.1) structure.

pad1Octet (1 byte): An optional 8-bit, unsigned integer. Padding. Values in this field MUST be ignored.

 
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