2.2.2.4 FLOOD
The FLOOD message is sent by a Publisher to a Resolver in response to a REQUEST message so that it can provide a route entry or to revoke a CPA.
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FieldID1 |
Length1 |
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Reserved1 |
D |
Reserved2 |
Padding1 |
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FieldID2 |
Length2 |
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Validate Key (32 bytes) |
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FieldID3 (optional) |
Length3 (optional) |
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Keytoken (variable) |
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Padding3 (variable) |
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FieldID4 (optional) |
Length4 (optional) |
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Revoke CPA (variable) |
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Padding4 (variable) |
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FieldID5 (optional) |
Length5 (optional) |
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Route Entry (variable) |
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Padding5 (variable) |
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FieldID6 (optional) |
Length6 (optional) |
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Flooded List (variable) |
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FieldID1 (2 bytes): MUST be set to 0x0043 (FLOOD_CONTROLS).
Length1 (2 bytes): MUST be set to 0x0007.
Reserved1 (15 bits): MUST be set to zero and ignored on receipt.
D (1 bit): If set, indicates that the sender does not require the receiver to send an ACK message.
If not set, indicates that the sender requires the receiver to send an ACK message.
Reserved2 (1 byte): MUST be set to zero and ignored on receipt.
Padding1 (1 byte): MUST be set to zero and ignored on receipt.
FieldID2 (2 bytes): MUST be set to 0x0039 (VALIDATE_DRT_ID).
Length2 (2 bytes): MUST be set to 0x0024.
Validate Key (32 bytes): MUST contain a key that the searching node recognizes as published by the destination node.
FieldID3 (2 bytes): If present, MUST be set to 0x009F (KEYTOKEN). This field MUST be present if and only if the protocol is executing in confidential security mode.
Length3 (2 bytes): If present, MUST be set to 4 plus the length in bytes of the Keytoken field. This field MUST be present if and only if FieldID3 is present.
Keytoken (variable): Optional. Contains a Keytoken structure defined in the security profile and provided by the upper-layer application. It is used by the recipient of the message to decrypt the encrypted structures in this message. This field MUST be present if and only if FieldID3 is present.
Padding3 (variable): Optional. A number of bytes between 0 and 3, such that the offset from the start of the message to the end of this field is a multiple of 4. This field MUST be present if and only if FieldID3 is present. This field MUST be set to zero and ignored on receipt.
FieldID4 (2 bytes): This field MUST be present if and only if the FLOOD message is sent in the context of unregistering a key. If present, MUST be set to 0x009C (REVOKE_CPA), if and only if the protocol is executing in resolve or membership security mode. This field MUST be set to 0x00A2 (Encrypted CPA), if and only if the protocol is executing in confidential security mode.
Length4 (2 bytes): MUST be present if and only if FieldID4 is present. If present, MUST be set to 4 plus the length in bytes of the Revoke CPA field.
Revoke CPA (variable): Optional. This field MUST be present if and only if the FLOOD message is sent in the context of unregistering a key. If present, an Encoded CPA structure that contains the CPA to revoke. The Encoded CPA structure MUST be encrypted if and only if the protocol is executing in confidential security mode.
Padding4 (variable): Optional. A number of bytes between 0 and 3, such that the offset from the start of the message to the end of this field is a multiple of 4. This field MUST be present if and only if FieldID4 is present. This field MUST be set to zero and ignored on receipt.
FieldID5 (2 bytes): If present, MUST be set to 0x009A (ROUTING_ENTRY). This field MUST be present if the node is flooding a route entry to its neighbors. Note that a receiver can tell whether this field is present or absent based on the value at this location.
Length5 (2 bytes): MUST be present if and only if FieldID5 is present. If present, this field MUST be set to 4 plus the length in bytes of the Route Entry field.
Route Entry (variable): Optional. A ROUTE_ENTRY structure that contains an entry the source node sends to the destination node. This field MUST be present if and only if FieldID5 is present. The ROUTE_ENTRY structure MUST be encrypted if and only if the protocol is executing in confidential security mode.
Padding5 (variable): Optional. A number of bytes between 0 and 3, such that the offset from the start of the message to the end of this field is a multiple of 4. This field MUST be present if and only if FieldID5 is present. This field MUST be set to zero and ignored on receipt.
FieldID6 (2 bytes): If Present, MUST be set to 0x00A0 (ENCRYPTED_ENDPOINT_ARRAY). This field MUST be present if and only if the protocol is executing in confidential security mode.
Length6 (2 bytes): MUST be set to length in bytes of the Flooded List field. This field MUST be present if and only if FieldID6 is present.
Flooded List (variable): Optional. MUST contain an IPV6_ENDPOINT_ARRAY structure. The IPV6_ENDPOINT_ARRAY structure MUST be encrypted if and only if the protocol is executing in confidential security mode.