diff options
| -rw-r--r-- | src/net.cpp | 32 | ||||
| -rw-r--r-- | src/netaddress.h | 1 |
2 files changed, 29 insertions, 4 deletions
diff --git a/src/net.cpp b/src/net.cpp index 8cf59f0b0d..82e55d4189 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -230,9 +230,27 @@ std::optional<CAddress> GetLocalAddrForPeer(CNode *pnode) return std::nullopt; } +/** + * If an IPv6 address belongs to the address range used by the CJDNS network and + * the CJDNS network is reachable (-cjdnsreachable config is set), then change + * the type from NET_IPV6 to NET_CJDNS. + * @param[in] service Address to potentially convert. + * @return a copy of `service` either unmodified or changed to CJDNS. + */ +CService MaybeFlipIPv6toCJDNS(const CService& service) +{ + CService ret{service}; + if (ret.m_net == NET_IPV6 && ret.m_addr[0] == 0xfc && IsReachable(NET_CJDNS)) { + ret.m_net = NET_CJDNS; + } + return ret; +} + // learn a new local address -bool AddLocal(const CService& addr, int nScore) +bool AddLocal(const CService& addr_, int nScore) { + CService addr{MaybeFlipIPv6toCJDNS(addr_)}; + if (!addr.IsRoutable()) return false; @@ -409,7 +427,8 @@ CNode* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCo if (pszDest) { std::vector<CService> resolved; if (Lookup(pszDest, resolved, default_port, fNameLookup && !HaveNameProxy(), 256) && !resolved.empty()) { - addrConnect = CAddress(resolved[GetRand(resolved.size())], NODE_NONE); + const CService rnd{resolved[GetRand(resolved.size())]}; + addrConnect = CAddress{MaybeFlipIPv6toCJDNS(rnd), NODE_NONE}; if (!addrConnect.IsValid()) { LogPrint(BCLog::NET, "Resolver returned invalid address %s for %s\n", addrConnect.ToString(), pszDest); return nullptr; @@ -1092,9 +1111,11 @@ void CConnman::AcceptConnection(const ListenSocket& hListenSocket) { if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr)) { LogPrintf("Warning: Unknown socket family\n"); + } else { + addr = CAddress{MaybeFlipIPv6toCJDNS(addr), NODE_NONE}; } - const CAddress addr_bind = GetBindAddress(hSocket); + const CAddress addr_bind{MaybeFlipIPv6toCJDNS(GetBindAddress(hSocket)), NODE_NONE}; NetPermissionFlags permissionFlags = NetPermissionFlags::None; hListenSocket.AddSocketPermissionFlags(permissionFlags); @@ -2460,7 +2481,10 @@ NodeId CConnman::GetNewNodeId() } -bool CConnman::Bind(const CService &addr, unsigned int flags, NetPermissionFlags permissions) { +bool CConnman::Bind(const CService& addr_, unsigned int flags, NetPermissionFlags permissions) +{ + const CService addr{MaybeFlipIPv6toCJDNS(addr_)}; + if (!(flags & BF_EXPLICIT) && !IsReachable(addr)) { return false; } diff --git a/src/netaddress.h b/src/netaddress.h index 57eb8bc72f..f074c1d3ec 100644 --- a/src/netaddress.h +++ b/src/netaddress.h @@ -550,6 +550,7 @@ public: } friend class CServiceHash; + friend CService MaybeFlipIPv6toCJDNS(const CService& service); }; class CServiceHash |