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Merge bitcoin#25314: p2p: always set nTime for self-advertisements
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99b9e5f p2p: always set nTime for self-advertisements (Martin Zumsande)

Pull request description:

  This logic was recently changed in bitcoin@0cfc0cd to overwrite `addrLocal` with the address they gave us when self-advertising to an inbound peer. But if we don't also change `nTime` again from the default `TIME_INIT`, our peer will not relay our advertised address any further.

ACKs for top commit:
  naumenkogs:
    ACK 99b9e5f
  laanwj:
    Code review ACK 99b9e5f
  vasild:
    ACK 99b9e5f

Tree-SHA512: 4c7ea51cc77ddaa4b3537962ad2ad085f7ef5322982d3b1f5baecb852719eb99dd578436ca63432cb6b0a4fbd8b59fca793caf326c4663a4d6f34301e8146aa2
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laanwj committed Jun 21, 2022
2 parents 3486911 + 99b9e5f commit c3a41ad
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Showing 2 changed files with 6 additions and 3 deletions.
2 changes: 1 addition & 1 deletion src/net.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -250,7 +250,7 @@ std::optional<CAddress> GetLocalAddrForPeer(CNode *pnode)
if (pnode->IsInboundConn()) {
// For inbound connections, assume both the address and the port
// as seen from the peer.
addrLocal = CAddress{pnode->GetAddrLocal(), addrLocal.nServices};
addrLocal = CAddress{pnode->GetAddrLocal(), addrLocal.nServices, addrLocal.nTime};
} else {
// For outbound connections, assume just the address as seen from
// the peer and leave the port in `addrLocal` as returned by
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7 changes: 5 additions & 2 deletions src/test/net_tests.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -675,10 +675,13 @@ BOOST_AUTO_TEST_CASE(get_local_addr_for_peer_port)
const uint16_t bind_port = 20001;
m_node.args->ForceSetArg("-bind", strprintf("3.4.5.6:%u", bind_port));

const uint32_t current_time = static_cast<uint32_t>(GetAdjustedTime());
SetMockTime(current_time);

// Our address:port as seen from the peer, completely different from the above.
in_addr peer_us_addr;
peer_us_addr.s_addr = htonl(0x02030405);
const CAddress peer_us{CService{peer_us_addr, 20002}, NODE_NETWORK};
const CAddress peer_us{CService{peer_us_addr, 20002}, NODE_NETWORK, current_time};

// Create a peer with a routable IPv4 address (outbound).
in_addr peer_out_in_addr;
Expand All @@ -699,7 +702,7 @@ BOOST_AUTO_TEST_CASE(get_local_addr_for_peer_port)
// Without the fix peer_us:8333 is chosen instead of the proper peer_us:bind_port.
auto chosen_local_addr = GetLocalAddrForPeer(&peer_out);
BOOST_REQUIRE(chosen_local_addr);
const CService expected{peer_us_addr, bind_port};
const CAddress expected{CService{peer_us_addr, bind_port}, NODE_NETWORK, current_time};
BOOST_CHECK(*chosen_local_addr == expected);

// Create a peer with a routable IPv4 address (inbound).
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