2.2.5.5 ExtendedAddressHeader
The ExtendedAddressHeader specifies the host address from which a message was received.<8> This header MUST be ignored if the AddressType field is 0x0000.
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AddressLength |
AddressType |
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AddressScope |
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Address (16 bytes) |
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HeaderSize (4 bytes): A ULONG ([MS-DTYP] section 2.2.51) that specifies the size, in bytes, of the ExtendedAddressHeader.
AddressLength (2 bytes): A USHORT ([MS-DTYP] section 2.2.58) that MUST be the actual address length in the Address field.
AddressType (2 bytes): A USHORT that MUST be set to one of the following values.
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Value
Meaning
0x0000
This header MUST be ignored.
IP_ADDRESS_TYPE
0x0001
The address specified in the Address field is an IPv4 address.
IPV6_ADDRESS_TYPE
0x0006
The address specified in the Address field is an IPv6 address.
AddressScope (4 bytes): A ULONG that MUST be set either to the IPv6 address scope if the AddressType field is IPV6_ADDRESS_TYPE or otherwise to 0x00000000. See [RFC2553] section 3.3.
Address (16 bytes): An array of UCHAR ([MS-DTYP] section 2.2.45) that MUST contain the host address from which the message was received. If the AddressType field is IP_ADDRESS_TYPE, the address MUST be in IPv4 address format. If the AddressType field is IPV6_ADDRESS_TYPE, the address MUST be in IPv6 address format. See [RFC2553] section 3.3.