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Merge #20661: Only select from addrv2-capable peers for torv3 address relay

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37fe80e6267094f6051ccf9bec0c7f1a6b9e15da Only consider addrv2 peers for relay of non-addrv1 addresses (Pieter Wuille)
83f8821a6f41854edd5c0b11deabba658890cde1 refactor: add IsAddrCompatible() to CNode (Pieter Wuille)

Pull request description:

  When selecting peers to relay an address to, only pick addrv2-capable ones if the address cannot be represented in addr(v1).

  Without this I expect that propagation of torv3 addresses over the cleartext network will be very hard for a while.

ACKs for top commit:
  jonatack:
    ACK 37fe80e6267094f6051ccf9bec0c7f1a6b9e15da
  vasild:
    ACK 37fe80e6267094f6051ccf9bec0c7f1a6b9e15da

Tree-SHA512: 18a854ea43ad473cf89b9c5193b524109d7af75c26f7aa7e26cd72ad0db52f19c8001d566c607a7e6772bc314f770f09b6c3e07282d110c5daea193edc592cd2
This commit is contained in:
Wladimir J. van der Laan 2020-12-16 18:05:41 +01:00 committed by UdjinM6
parent 7b2026e49b
commit b0d655216b
No known key found for this signature in database
GPG Key ID: 83592BD1400D58D9
2 changed files with 13 additions and 8 deletions
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17
src/net.h
View File

@ -1165,17 +1165,22 @@ public:
addrKnown.insert(_addr.GetKey());
}
/**
* Whether the peer supports the address. For example, a peer that does not
* implement BIP155 cannot receive Tor v3 addresses because it requires
* ADDRv2 (BIP155) encoding.
*/
bool IsAddrCompatible(const CAddress& addr) const
{
return m_wants_addrv2 || addr.IsAddrV1Compatible();
}
void PushAddress(const CAddress& _addr, FastRandomContext &insecure_rand)
{
// Whether the peer supports the address in `_addr`. For example,
// nodes that do not implement BIP155 cannot receive Tor v3 addresses
// because they require ADDRv2 (BIP155) encoding.
const bool addr_format_supported = m_wants_addrv2 || _addr.IsAddrV1Compatible();
// Known checking here is only to save space from duplicates.
// SendMessages will filter it again for knowns that were added
// after addresses were pushed.
if (_addr.IsValid() && !addrKnown.contains(_addr.GetKey()) && addr_format_supported) {
if (_addr.IsValid() && !addrKnown.contains(_addr.GetKey()) && IsAddrCompatible(_addr)) {
if (vAddrToSend.size() >= MAX_ADDR_TO_SEND) {
vAddrToSend[insecure_rand.randrange(vAddrToSend.size())] = _addr;
} else {

4
src/net_processing.cpp
View File

@ -1487,8 +1487,8 @@ static void RelayAddress(const CAddress& addr, bool fReachable, CConnman* connma
std::array<std::pair<uint64_t, CNode*>,2> best{{{0, nullptr}, {0, nullptr}}};
assert(nRelayNodes <= best.size());
auto sortfunc = [&best, &hasher, nRelayNodes](CNode* pnode) {
if (pnode->nVersion >= CADDR_TIME_VERSION) {
auto sortfunc = [&best, &hasher, nRelayNodes, addr](CNode* pnode) {
if (pnode->nVersion >= CADDR_TIME_VERSION && pnode->IsAddrCompatible(addr)) {
uint64_t hashKey = CSipHasher(hasher).Write(pnode->GetId()).Finalize();
for (unsigned int i = 0; i < nRelayNodes; i++) {
if (hashKey > best[i].first) {