diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/init.cpp | 17 | ||||
| -rw-r--r-- | src/net.cpp | 9 |
2 files changed, 24 insertions, 2 deletions
diff --git a/src/init.cpp b/src/init.cpp index f3cb763ecc..0ca94974bb 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -723,6 +723,16 @@ void InitParameterInteraction(ArgsManager& args) if (args.SoftSetBoolArg("-whitelistrelay", true)) LogPrintf("%s: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1\n", __func__); } + if (args.IsArgSet("-onlynet")) { + const auto onlynets = args.GetArgs("-onlynet"); + bool clearnet_reachable = std::any_of(onlynets.begin(), onlynets.end(), [](const auto& net) { + const auto n = ParseNetwork(net); + return n == NET_IPV4 || n == NET_IPV6; + }); + if (!clearnet_reachable && args.SoftSetBoolArg("-dnsseed", false)) { + LogPrintf("%s: parameter interaction: -onlynet excludes IPv4 and IPv6 -> setting -dnsseed=0\n", __func__); + } + } } /** @@ -1281,6 +1291,13 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info) // 2.1. -onlynet is not given or // 2.2. -onlynet=cjdns is given + // Requesting DNS seeds entails connecting to IPv4/IPv6, which -onlynet options may prohibit: + // If -dnsseed=1 is explicitly specified, abort. If it's left unspecified by the user, we skip + // the DNS seeds by adjusting -dnsseed in InitParameterInteraction. + if (args.GetBoolArg("-dnsseed") == true && !IsReachable(NET_IPV4) && !IsReachable(NET_IPV6)) { + return InitError(strprintf(_("Incompatible options: -dnsseed=1 was explicitly specified, but -onlynet forbids connections to IPv4/IPv6"))); + }; + // Check for host lookup allowed before parsing any network related parameters fNameLookup = args.GetBoolArg("-dns", DEFAULT_NAME_LOOKUP); diff --git a/src/net.cpp b/src/net.cpp index 6659b64246..d1df393ad3 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -1642,15 +1642,20 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect) LOCK2(m_addr_fetches_mutex, m_added_nodes_mutex); if (m_addr_fetches.empty() && m_added_nodes.empty()) { add_fixed_seeds_now = true; - LogPrintf("Adding fixed seeds as -dnsseed=0, -addnode is not provided and all -seednode(s) attempted\n"); + LogPrintf("Adding fixed seeds as -dnsseed=0 (or IPv4/IPv6 connections are disabled via -onlynet), -addnode is not provided and all -seednode(s) attempted\n"); } } if (add_fixed_seeds_now) { + std::vector<CAddress> seed_addrs{ConvertSeeds(Params().FixedSeeds())}; + seed_addrs.erase(std::remove_if(seed_addrs.begin(), seed_addrs.end(), + [](const CAddress& addr) { return !IsReachable(addr); }), + seed_addrs.end()); CNetAddr local; local.SetInternal("fixedseeds"); - addrman.Add(ConvertSeeds(Params().FixedSeeds()), local); + addrman.Add(seed_addrs, local); add_fixed_seeds = false; + LogPrintf("Added %d fixed seeds from reachable networks.\n", seed_addrs.size()); } } |