2.2.2.2 CONNECT
The CONNECT message is used by a node to establish a direct connection or neighbor connection with another node. This message provides the destination node with the listening addresses of the source node.
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Message Size |
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Version |
Message Type |
Reserved1 |
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Z1 |
Z2 |
Z3 |
Z4 |
U |
D |
Z7 |
N |
Address Count |
Address Offset |
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Friendly Name Offset |
Reserved2 |
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Source Node ID |
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IPv6 Address Array (variable) |
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Friendly Name (variable) |
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Message Size (4 bytes): The total number of bytes in the message.
Version (1 byte): The Peer-to-Peer Graphing Protocol version number. This MUST be set to 0x10 to signify version 1.0.
Message Type (1 byte): MUST be set to 0x02.
Reserved1 (2 bytes): MUST be set to zero and MUST be ignored on receipt.
Z1 (1 bit): MUST be set to 0 and MUST be ignored on receipt.
Z2 (1 bit): MUST be set to 0 and MUST be ignored on receipt.
Z3 (1 bit): MUST be set to 0 and MUST be ignored on receipt.
Z4 (1 bit): MUST be set to 0 and MUST be ignored on receipt.
U (1 bit): (Update): When set, indicates that the source node has begun listening and now has a valid set of addresses.
D (1 bit): (Direct): When set, indicates that this connection is being established as a direct connection.
Z7 (1 bit): MUST be set to 0 and MUST be ignored on receipt.
N (1 bit): (Neighbor List): When set, this flag indicates that the source node wants the list of neighbors of the target node.
Address Count (1 byte): The total number of address entries included in the message. If the Update bit is set, this field MUST NOT be zero.
Address Offset (2 bytes): The offset, in bytes, from the beginning of the message to the first address in the address list.
Friendly Name Offset (2 bytes): The offset, in bytes, from the beginning of the message to the Friendly Name.
Reserved2 (2 bytes): MUST be set to zero and MUST be ignored on receipt.
Source Node ID (8 bytes): The node ID of the sender.
IPv6 Address Array (variable): An array of Address Count IPv6 addresses in PEER_IN6_ADDRESS (section 2.2.1.3) form. This field MUST NOT be present if the Address Count is 0.
Friendly Name (variable): A null-terminated UTF-8 string representing the friendly name of the sender. If the Friendly Name Offset is equal to the Message Size, this field MUST NOT be present.