diff options
author | brunoerg <brunoely.gc@gmail.com> | 2022-10-11 13:37:45 -0300 |
---|---|---|
committer | brunoerg <brunoely.gc@gmail.com> | 2023-05-26 13:41:07 -0300 |
commit | 5c832c3820253affc65c0ed490e26e5b0a4d5c9b (patch) | |
tree | 3b57a22231de464f33b256cf21c9c300482ca499 /src | |
parent | 34bcdfc6a65de906c65edccdd96fe15219081cd2 (diff) | |
download | bitcoin-5c832c3820253affc65c0ed490e26e5b0a4d5c9b.tar.xz |
p2p, refactor: return `std::optional<CNetAddr>` in `LookupHost`
Diffstat (limited to 'src')
-rw-r--r-- | src/bench/addrman.cpp | 9 | ||||
-rw-r--r-- | src/httpserver.cpp | 12 | ||||
-rw-r--r-- | src/mapport.cpp | 8 | ||||
-rw-r--r-- | src/netbase.cpp | 24 | ||||
-rw-r--r-- | src/netbase.h | 8 | ||||
-rw-r--r-- | src/qt/optionsdialog.cpp | 5 | ||||
-rw-r--r-- | src/rpc/net.cpp | 13 | ||||
-rw-r--r-- | src/test/addrman_tests.cpp | 12 | ||||
-rw-r--r-- | src/test/fuzz/netbase_dns_lookup.cpp | 6 | ||||
-rw-r--r-- | src/test/net_tests.cpp | 29 | ||||
-rw-r--r-- | src/test/netbase_tests.cpp | 13 | ||||
-rw-r--r-- | src/zmq/zmqpublishnotifier.cpp | 5 |
12 files changed, 61 insertions, 83 deletions
diff --git a/src/bench/addrman.cpp b/src/bench/addrman.cpp index f498071595..f044feebba 100644 --- a/src/bench/addrman.cpp +++ b/src/bench/addrman.cpp @@ -72,13 +72,6 @@ static void FillAddrMan(AddrMan& addrman) AddAddressesToAddrMan(addrman); } -static CNetAddr ResolveIP(const std::string& ip) -{ - CNetAddr addr; - LookupHost(ip, addr, false); - return addr; -} - /* Benchmarks */ static void AddrManAdd(benchmark::Bench& bench) @@ -128,7 +121,7 @@ static void AddrManSelectByNetwork(benchmark::Bench& bench) i2p_service.SetSpecial("udhdrtrcetjm5sxzskjyr5ztpeszydbh4dpl3pl4utgqqw2v4jna.b32.i2p"); CAddress i2p_address(i2p_service, NODE_NONE); i2p_address.nTime = Now<NodeSeconds>(); - CNetAddr source = ResolveIP("252.2.2.2"); + const CNetAddr source{LookupHost("252.2.2.2", false).value()}; addrman.Add({i2p_address}, source); FillAddrMan(addrman); diff --git a/src/httpserver.cpp b/src/httpserver.cpp index 4f8a2b4d8d..128c4e3c56 100644 --- a/src/httpserver.cpp +++ b/src/httpserver.cpp @@ -170,12 +170,8 @@ static bool ClientAllowed(const CNetAddr& netaddr) static bool InitHTTPAllowList() { rpc_allow_subnets.clear(); - CNetAddr localv4; - CNetAddr localv6; - LookupHost("127.0.0.1", localv4, false); - LookupHost("::1", localv6, false); - rpc_allow_subnets.push_back(CSubNet(localv4, 8)); // always allow IPv4 local subnet - rpc_allow_subnets.push_back(CSubNet(localv6)); // always allow IPv6 localhost + rpc_allow_subnets.push_back(CSubNet{LookupHost("127.0.0.1", false).value(), 8}); // always allow IPv4 local subnet + rpc_allow_subnets.push_back(CSubNet{LookupHost("::1", false).value()}); // always allow IPv6 localhost for (const std::string& strAllow : gArgs.GetArgs("-rpcallowip")) { CSubNet subnet; LookupSubNet(strAllow, subnet); @@ -338,8 +334,8 @@ static bool HTTPBindAddresses(struct evhttp* http) LogPrintf("Binding RPC on address %s port %i\n", i->first, i->second); evhttp_bound_socket *bind_handle = evhttp_bind_socket_with_handle(http, i->first.empty() ? nullptr : i->first.c_str(), i->second); if (bind_handle) { - CNetAddr addr; - if (i->first.empty() || (LookupHost(i->first, addr, false) && addr.IsBindAny())) { + const std::optional<CNetAddr> addr{LookupHost(i->first, false)}; + if (i->first.empty() || (addr.has_value() && addr->IsBindAny())) { LogPrintf("WARNING: the RPC server is not safe to expose to untrusted networks such as the public internet\n"); } boundSockets.push_back(bind_handle); diff --git a/src/mapport.cpp b/src/mapport.cpp index 994fd12cf5..2bcd169e92 100644 --- a/src/mapport.cpp +++ b/src/mapport.cpp @@ -175,10 +175,10 @@ static bool ProcessUpnp() LogPrintf("UPnP: GetExternalIPAddress() returned %d\n", r); } else { if (externalIPAddress[0]) { - CNetAddr resolved; - if (LookupHost(externalIPAddress, resolved, false)) { - LogPrintf("UPnP: ExternalIPAddress = %s\n", resolved.ToStringAddr()); - AddLocal(resolved, LOCAL_MAPPED); + std::optional<CNetAddr> resolved{LookupHost(externalIPAddress, false)}; + if (resolved.has_value()) { + LogPrintf("UPnP: ExternalIPAddress = %s\n", resolved->ToStringAddr()); + AddLocal(resolved.value(), LOCAL_MAPPED); } } else { LogPrintf("UPnP: GetExternalIPAddress failed.\n"); diff --git a/src/netbase.cpp b/src/netbase.cpp index b7eb391a7b..8f6f92ea7d 100644 --- a/src/netbase.cpp +++ b/src/netbase.cpp @@ -173,16 +173,10 @@ std::vector<CNetAddr> LookupHost(const std::string& name, unsigned int nMaxSolut return LookupIntern(strHost, nMaxSolutions, fAllowLookup, dns_lookup_function); } -bool LookupHost(const std::string& name, CNetAddr& addr, bool fAllowLookup, DNSLookupFn dns_lookup_function) +std::optional<CNetAddr> LookupHost(const std::string& name, bool fAllowLookup, DNSLookupFn dns_lookup_function) { - if (!ContainsNoNUL(name)) { - return false; - } const std::vector<CNetAddr> addresses{LookupHost(name, 1, fAllowLookup, dns_lookup_function)}; - if(addresses.empty()) - return false; - addr = addresses.front(); - return true; + return addresses.empty() ? std::nullopt : std::make_optional(addresses.front()); } std::vector<CService> Lookup(const std::string& name, uint16_t portDefault, bool fAllowLookup, unsigned int nMaxSolutions, DNSLookupFn dns_lookup_function) @@ -669,27 +663,27 @@ bool LookupSubNet(const std::string& subnet_str, CSubNet& subnet_out) const size_t slash_pos{subnet_str.find_last_of('/')}; const std::string str_addr{subnet_str.substr(0, slash_pos)}; - CNetAddr addr; + const std::optional<CNetAddr> addr{LookupHost(str_addr, /*fAllowLookup=*/false)}; - if (LookupHost(str_addr, addr, /*fAllowLookup=*/false)) { + if (addr.has_value()) { if (slash_pos != subnet_str.npos) { const std::string netmask_str{subnet_str.substr(slash_pos + 1)}; uint8_t netmask; if (ParseUInt8(netmask_str, &netmask)) { // Valid number; assume CIDR variable-length subnet masking. - subnet_out = CSubNet{addr, netmask}; + subnet_out = CSubNet{addr.value(), netmask}; return subnet_out.IsValid(); } else { // Invalid number; try full netmask syntax. Never allow lookup for netmask. - CNetAddr full_netmask; - if (LookupHost(netmask_str, full_netmask, /*fAllowLookup=*/false)) { - subnet_out = CSubNet{addr, full_netmask}; + const std::optional<CNetAddr> full_netmask{LookupHost(netmask_str, /*fAllowLookup=*/false)}; + if (full_netmask.has_value()) { + subnet_out = CSubNet{addr.value(), full_netmask.value()}; return subnet_out.IsValid(); } } } else { // Single IP subnet (<ipv4>/32 or <ipv6>/128). - subnet_out = CSubNet{addr}; + subnet_out = CSubNet{addr.value()}; return subnet_out.IsValid(); } } diff --git a/src/netbase.h b/src/netbase.h index 6c972b81eb..1da4f5c51d 100644 --- a/src/netbase.h +++ b/src/netbase.h @@ -117,13 +117,13 @@ std::vector<CNetAddr> LookupHost(const std::string& name, unsigned int nMaxSolut /** * Resolve a host string to its first corresponding network address. * - * @returns The resulting network addresses to which the specified host - * string resolved. + * @returns The resulting network address to which the specified host + * string resolved or std::nullopt if host does not resolve to an address. * - * @see LookupHost(const std::string&, uint16_t, bool, DNSLookupFn) + * @see LookupHost(const std::string&, unsigned int, bool, DNSLookupFn) * for additional parameter descriptions. */ -bool LookupHost(const std::string& name, CNetAddr& addr, bool fAllowLookup, DNSLookupFn dns_lookup_function = g_dns_lookup); +std::optional<CNetAddr> LookupHost(const std::string& name, bool fAllowLookup, DNSLookupFn dns_lookup_function = g_dns_lookup); /** * Resolve a service string to its corresponding service. diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp index 6dec4b2e42..4ece6bbaf2 100644 --- a/src/qt/optionsdialog.cpp +++ b/src/qt/optionsdialog.cpp @@ -406,9 +406,8 @@ void OptionsDialog::updateProxyValidationState() void OptionsDialog::updateDefaultProxyNets() { - CNetAddr ui_proxy_netaddr; - LookupHost(ui->proxyIp->text().toStdString(), ui_proxy_netaddr, /*fAllowLookup=*/false); - const CService ui_proxy{ui_proxy_netaddr, ui->proxyPort->text().toUShort()}; + const std::optional<CNetAddr> ui_proxy_netaddr{LookupHost(ui->proxyIp->text().toStdString(), /*fAllowLookup=*/false)}; + const CService ui_proxy{ui_proxy_netaddr.value_or(CNetAddr{}), ui->proxyPort->text().toUShort()}; Proxy proxy; bool has_proxy; diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp index f247e6ee91..a2a46ef32f 100644 --- a/src/rpc/net.cpp +++ b/src/rpc/net.cpp @@ -713,9 +713,10 @@ static RPCHelpMan setban() isSubnet = true; if (!isSubnet) { - CNetAddr resolved; - LookupHost(request.params[0].get_str(), resolved, false); - netAddr = resolved; + const std::optional<CNetAddr> addr{LookupHost(request.params[0].get_str(), false)}; + if (addr.has_value()) { + netAddr = addr.value(); + } } else LookupSubNet(request.params[0].get_str(), subNet); @@ -943,11 +944,11 @@ static RPCHelpMan addpeeraddress() const bool tried{request.params[2].isNull() ? false : request.params[2].get_bool()}; UniValue obj(UniValue::VOBJ); - CNetAddr net_addr; + std::optional<CNetAddr> net_addr{LookupHost(addr_string, false)}; bool success{false}; - if (LookupHost(addr_string, net_addr, false)) { - CService service{net_addr, port}; + if (net_addr.has_value()) { + CService service{net_addr.value(), port}; CAddress address{MaybeFlipIPv6toCJDNS(service), ServiceFlags{NODE_NETWORK | NODE_WITNESS}}; address.nTime = Now<NodeSeconds>(); // The source address is set equal to the address. This is equivalent to the peer diff --git a/src/test/addrman_tests.cpp b/src/test/addrman_tests.cpp index 95dbaa449b..328e7f81a0 100644 --- a/src/test/addrman_tests.cpp +++ b/src/test/addrman_tests.cpp @@ -33,9 +33,9 @@ static int32_t GetCheckRatio(const NodeContext& node_ctx) static CNetAddr ResolveIP(const std::string& ip) { - CNetAddr addr; - BOOST_CHECK_MESSAGE(LookupHost(ip, addr, false), strprintf("failed to resolve: %s", ip)); - return addr; + const std::optional<CNetAddr> addr{LookupHost(ip, false)}; + BOOST_CHECK_MESSAGE(addr.has_value(), strprintf("failed to resolve: %s", ip)); + return addr.value_or(CNetAddr{}); } static CService ResolveService(const std::string& ip, uint16_t port = 0) @@ -1012,9 +1012,9 @@ static CDataStream MakeCorruptPeersDat() const std::optional<CService> serv{Lookup("252.1.1.1", 7777, false)}; BOOST_REQUIRE(serv.has_value()); CAddress addr = CAddress(serv.value(), NODE_NONE); - CNetAddr resolved; - BOOST_REQUIRE(LookupHost("252.2.2.2", resolved, false)); - AddrInfo info = AddrInfo(addr, resolved); + std::optional<CNetAddr> resolved{LookupHost("252.2.2.2", false)}; + BOOST_REQUIRE(resolved.has_value()); + AddrInfo info = AddrInfo(addr, resolved.value()); s << info; return s; diff --git a/src/test/fuzz/netbase_dns_lookup.cpp b/src/test/fuzz/netbase_dns_lookup.cpp index 47289ccbee..dcf500acc3 100644 --- a/src/test/fuzz/netbase_dns_lookup.cpp +++ b/src/test/fuzz/netbase_dns_lookup.cpp @@ -36,9 +36,9 @@ FUZZ_TARGET(netbase_dns_lookup) assert(resolved_addresses.size() <= max_results || max_results == 0); } { - CNetAddr resolved_address; - if (LookupHost(name, resolved_address, allow_lookup, fuzzed_dns_lookup_function)) { - assert(!resolved_address.IsInternal()); + const std::optional<CNetAddr> resolved_address{LookupHost(name, allow_lookup, fuzzed_dns_lookup_function)}; + if (resolved_address.has_value()) { + assert(!resolved_address.value().IsInternal()); } } { diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp index 631c213627..aa577f7b27 100644 --- a/src/test/net_tests.cpp +++ b/src/test/net_tests.cpp @@ -135,7 +135,7 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic) CNetAddr addr; // IPv4, INADDR_ANY - BOOST_REQUIRE(LookupHost("0.0.0.0", addr, false)); + addr = LookupHost("0.0.0.0", false).value(); BOOST_REQUIRE(!addr.IsValid()); BOOST_REQUIRE(addr.IsIPv4()); @@ -144,7 +144,7 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic) BOOST_CHECK_EQUAL(addr.ToStringAddr(), "0.0.0.0"); // IPv4, INADDR_NONE - BOOST_REQUIRE(LookupHost("255.255.255.255", addr, false)); + addr = LookupHost("255.255.255.255", false).value(); BOOST_REQUIRE(!addr.IsValid()); BOOST_REQUIRE(addr.IsIPv4()); @@ -153,7 +153,7 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic) BOOST_CHECK_EQUAL(addr.ToStringAddr(), "255.255.255.255"); // IPv4, casual - BOOST_REQUIRE(LookupHost("12.34.56.78", addr, false)); + addr = LookupHost("12.34.56.78", false).value(); BOOST_REQUIRE(addr.IsValid()); BOOST_REQUIRE(addr.IsIPv4()); @@ -162,7 +162,7 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic) BOOST_CHECK_EQUAL(addr.ToStringAddr(), "12.34.56.78"); // IPv6, in6addr_any - BOOST_REQUIRE(LookupHost("::", addr, false)); + addr = LookupHost("::", false).value(); BOOST_REQUIRE(!addr.IsValid()); BOOST_REQUIRE(addr.IsIPv6()); @@ -171,7 +171,7 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic) BOOST_CHECK_EQUAL(addr.ToStringAddr(), "::"); // IPv6, casual - BOOST_REQUIRE(LookupHost("1122:3344:5566:7788:9900:aabb:ccdd:eeff", addr, false)); + addr = LookupHost("1122:3344:5566:7788:9900:aabb:ccdd:eeff", false).value(); BOOST_REQUIRE(addr.IsValid()); BOOST_REQUIRE(addr.IsIPv6()); @@ -186,14 +186,14 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic) // id of "32", return the address as "fe80::1%32". const std::string link_local{"fe80::1"}; const std::string scoped_addr{link_local + "%32"}; - BOOST_REQUIRE(LookupHost(scoped_addr, addr, false)); + addr = LookupHost(scoped_addr, false).value(); BOOST_REQUIRE(addr.IsValid()); BOOST_REQUIRE(addr.IsIPv6()); BOOST_CHECK(!addr.IsBindAny()); BOOST_CHECK_EQUAL(addr.ToStringAddr(), scoped_addr); // Test that the delimiter "%" and default zone id of 0 can be omitted for the default scope. - BOOST_REQUIRE(LookupHost(link_local + "%0", addr, false)); + addr = LookupHost(link_local + "%0", false).value(); BOOST_REQUIRE(addr.IsValid()); BOOST_REQUIRE(addr.IsIPv6()); BOOST_CHECK(!addr.IsBindAny()); @@ -318,10 +318,9 @@ BOOST_AUTO_TEST_CASE(cnetaddr_tostring_canonical_ipv6) {"2001:db8:aaaa:bbbb:cccc:dddd:eeee:AaAa", "2001:db8:aaaa:bbbb:cccc:dddd:eeee:aaaa"}, }; for (const auto& [input_address, expected_canonical_representation_output] : canonical_representations_ipv6) { - CNetAddr net_addr; - BOOST_REQUIRE(LookupHost(input_address, net_addr, false)); - BOOST_REQUIRE(net_addr.IsIPv6()); - BOOST_CHECK_EQUAL(net_addr.ToStringAddr(), expected_canonical_representation_output); + const std::optional<CNetAddr> net_addr{LookupHost(input_address, false)}; + BOOST_REQUIRE(net_addr.value().IsIPv6()); + BOOST_CHECK_EQUAL(net_addr.value().ToStringAddr(), expected_canonical_representation_output); } } @@ -334,12 +333,12 @@ BOOST_AUTO_TEST_CASE(cnetaddr_serialize_v1) BOOST_CHECK_EQUAL(HexStr(s), "00000000000000000000000000000000"); s.clear(); - BOOST_REQUIRE(LookupHost("1.2.3.4", addr, false)); + addr = LookupHost("1.2.3.4", false).value(); s << addr; BOOST_CHECK_EQUAL(HexStr(s), "00000000000000000000ffff01020304"); s.clear(); - BOOST_REQUIRE(LookupHost("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b", addr, false)); + addr = LookupHost("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b", false).value(); s << addr; BOOST_CHECK_EQUAL(HexStr(s), "1a1b2a2b3a3b4a4b5a5b6a6b7a7b8a8b"); s.clear(); @@ -370,12 +369,12 @@ BOOST_AUTO_TEST_CASE(cnetaddr_serialize_v2) BOOST_CHECK_EQUAL(HexStr(s), "021000000000000000000000000000000000"); s.clear(); - BOOST_REQUIRE(LookupHost("1.2.3.4", addr, false)); + addr = LookupHost("1.2.3.4", false).value(); s << addr; BOOST_CHECK_EQUAL(HexStr(s), "010401020304"); s.clear(); - BOOST_REQUIRE(LookupHost("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b", addr, false)); + addr = LookupHost("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b", false).value(); s << addr; BOOST_CHECK_EQUAL(HexStr(s), "02101a1b2a2b3a3b4a4b5a5b6a6b7a7b8a8b"); s.clear(); diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp index 7e91819ddc..05953bfd10 100644 --- a/src/test/netbase_tests.cpp +++ b/src/test/netbase_tests.cpp @@ -24,9 +24,7 @@ BOOST_FIXTURE_TEST_SUITE(netbase_tests, BasicTestingSetup) static CNetAddr ResolveIP(const std::string& ip) { - CNetAddr addr; - LookupHost(ip, addr, false); - return addr; + return LookupHost(ip, false).value_or(CNetAddr{}); } static CSubNet ResolveSubNet(const std::string& subnet) @@ -477,11 +475,10 @@ BOOST_AUTO_TEST_CASE(netpermissions_test) BOOST_AUTO_TEST_CASE(netbase_dont_resolve_strings_with_embedded_nul_characters) { - CNetAddr addr; - BOOST_CHECK(LookupHost("127.0.0.1"s, addr, false)); - BOOST_CHECK(!LookupHost("127.0.0.1\0"s, addr, false)); - BOOST_CHECK(!LookupHost("127.0.0.1\0example.com"s, addr, false)); - BOOST_CHECK(!LookupHost("127.0.0.1\0example.com\0"s, addr, false)); + BOOST_CHECK(LookupHost("127.0.0.1"s, false).has_value()); + BOOST_CHECK(!LookupHost("127.0.0.1\0"s, false).has_value()); + BOOST_CHECK(!LookupHost("127.0.0.1\0example.com"s, false).has_value()); + BOOST_CHECK(!LookupHost("127.0.0.1\0example.com\0"s, false).has_value()); CSubNet ret; BOOST_CHECK(LookupSubNet("1.2.3.0/24"s, ret)); BOOST_CHECK(!LookupSubNet("1.2.3.0/24\0"s, ret)); diff --git a/src/zmq/zmqpublishnotifier.cpp b/src/zmq/zmqpublishnotifier.cpp index 21aa44c309..1241431523 100644 --- a/src/zmq/zmqpublishnotifier.cpp +++ b/src/zmq/zmqpublishnotifier.cpp @@ -97,9 +97,8 @@ static bool IsZMQAddressIPV6(const std::string &zmq_address) const size_t colon_index = zmq_address.rfind(':'); if (tcp_index == 0 && colon_index != std::string::npos) { const std::string ip = zmq_address.substr(tcp_prefix.length(), colon_index - tcp_prefix.length()); - CNetAddr addr; - LookupHost(ip, addr, false); - if (addr.IsIPv6()) return true; + const std::optional<CNetAddr> addr{LookupHost(ip, false)}; + if (addr.has_value() && addr.value().IsIPv6()) return true; } return false; } |