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net: advertise support for ADDRv2 via new message

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Introduce a new message `sendaddrv2` to signal support for ADDRv2.
Send the new message immediately after sending the `VERACK` message.

Add support for receiving and parsing ADDRv2 messages.

Send ADDRv2 messages (instead of ADDR) to a peer if he has
advertised support for it.

Co-authored-by: Carl Dong <contact@carldong.me>
This commit is contained in:
Vasil Dimov 2020-05-20 12:05:18 +02:00
parent 201a4596d9
commit 353a3fdaad
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GPG key ID: 54DF06F64B55CBBF
12 changed files with 392 additions and 23 deletions
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12
src/protocol.h
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@ -76,6 +76,18 @@ extern const char* VERACK;
* network.
*/
extern const char* ADDR;
/**
* The addrv2 message relays connection information for peers on the network just
* like the addr message, but is extended to allow gossiping of longer node
* addresses (see BIP155).
*/
extern const char *ADDRV2;
/**
* The sendaddrv2 message signals support for receiving ADDRV2 messages (BIP155).
* It also implies that its sender can encode as ADDRV2 and would send ADDRV2
* instead of ADDR to a peer that has signaled ADDRV2 support by sending SENDADDRV2.
*/
extern const char *SENDADDRV2;
/**
* The inv message (inventory message) transmits one or more inventories of
* objects known to the transmitting peer.