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Merge #17785: p2p: Unify Send and Receive protocol versions

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ddefb5c0b7 p2p: Use the greatest common version in peer logic (Hennadii Stepanov)
e084d45562 p2p: Remove SetCommonVersion() from VERACK handler (Hennadii Stepanov)
8d2026796a refactor: Rename local variable nSendVersion (Hennadii Stepanov)
e9a6d8b13b p2p: Unify Send and Receive protocol versions (Hennadii Stepanov)

Pull request description:

  On master (6fef85bfa3) `CNode` has two members to keep protocol version:
  - `nRecvVersion` for received messages
  - `nSendVersion` for messages to send

  After exchanging with `VERSION` and `VERACK` messages via protocol version `INIT_PROTO_VERSION`, both nodes set `nRecvVersion` _and_ `nSendVersion` to _the same_ value which is the greatest common protocol version.

  This PR:
  - replaces two `CNode` members, `nRecvVersion` `nSendVersion`, with `m_greatest_common_version`
  - removes duplicated getter and setter

  There is no change in behavior on the P2P network.

ACKs for top commit:
  jnewbery:
    ACK ddefb5c0b7
  naumenkogs:
    ACK ddefb5c0b7
  fjahr:
    Code review ACK ddefb5c0b7
  amitiuttarwar:
    code review but untested ACK ddefb5c0b7
  benthecarman:
    utACK `ddefb5c`

Tree-SHA512: 5305538dbaa5426b923b0afd20bdef4f248d310855d1d78427210c00716c67b7cb691515c421716b6157913e453076e293b10ff5fd2cd26a8e5375d42da7809d
This commit is contained in:
Wladimir J. van der Laan
2020-09-21 22:40:16 +02:00
parent 8c5f68118c ddefb5c0b7
commit 77376034d4
7 changed files with 54 additions and 92 deletions
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10
src/test/denialofservice_tests.cpp
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@@ -85,7 +85,7 @@ BOOST_AUTO_TEST_CASE(outbound_slow_chain_eviction)
// Mock an outbound peer
CAddress addr1(ip(0xa0b0c001), NODE_NONE);
CNode dummyNode1(id++, ServiceFlags(NODE_NETWORK | NODE_WITNESS), 0, INVALID_SOCKET, addr1, 0, 0, CAddress(), "", ConnectionType::OUTBOUND_FULL_RELAY);
dummyNode1.SetSendVersion(PROTOCOL_VERSION);
dummyNode1.SetCommonVersion(PROTOCOL_VERSION);
peerLogic->InitializeNode(&dummyNode1);
dummyNode1.nVersion = 1;
@@ -138,7 +138,7 @@ static void AddRandomOutboundPeer(std::vector<CNode *> &vNodes, PeerManager &pee
CAddress addr(ip(g_insecure_rand_ctx.randbits(32)), NODE_NONE);
vNodes.emplace_back(new CNode(id++, ServiceFlags(NODE_NETWORK | NODE_WITNESS), 0, INVALID_SOCKET, addr, 0, 0, CAddress(), "", ConnectionType::OUTBOUND_FULL_RELAY));
CNode &node = *vNodes.back();
node.SetSendVersion(PROTOCOL_VERSION);
node.SetCommonVersion(PROTOCOL_VERSION);
peerLogic.InitializeNode(&node);
node.nVersion = 1;
@@ -229,7 +229,7 @@ BOOST_AUTO_TEST_CASE(peer_discouragement)
banman->ClearBanned();
CAddress addr1(ip(0xa0b0c001), NODE_NONE);
CNode dummyNode1(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr1, 0, 0, CAddress(), "", ConnectionType::INBOUND);
dummyNode1.SetSendVersion(PROTOCOL_VERSION);
dummyNode1.SetCommonVersion(PROTOCOL_VERSION);
peerLogic->InitializeNode(&dummyNode1);
dummyNode1.nVersion = 1;
dummyNode1.fSuccessfullyConnected = true;
@@ -243,7 +243,7 @@ BOOST_AUTO_TEST_CASE(peer_discouragement)
CAddress addr2(ip(0xa0b0c002), NODE_NONE);
CNode dummyNode2(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr2, 1, 1, CAddress(), "", ConnectionType::INBOUND);
dummyNode2.SetSendVersion(PROTOCOL_VERSION);
dummyNode2.SetCommonVersion(PROTOCOL_VERSION);
peerLogic->InitializeNode(&dummyNode2);
dummyNode2.nVersion = 1;
dummyNode2.fSuccessfullyConnected = true;
@@ -280,7 +280,7 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
CAddress addr(ip(0xa0b0c001), NODE_NONE);
CNode dummyNode(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr, 4, 4, CAddress(), "", ConnectionType::INBOUND);
dummyNode.SetSendVersion(PROTOCOL_VERSION);
dummyNode.SetCommonVersion(PROTOCOL_VERSION);
peerLogic->InitializeNode(&dummyNode);
dummyNode.nVersion = 1;
dummyNode.fSuccessfullyConnected = true;