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808926be7e
317442525586ba9ff8b9af6c506b48f87cd8cd87 Cleanup headers after #20788 (Hennadii Stepanov) Pull request description: This is a header cleanup after #20788. ACKs for top commit: vasild: ACK 317442525586ba9ff8b9af6c506b48f87cd8cd87 Tree-SHA512: 1c21b1ba43841880625289174f10e5b333f6eb857f448e1e4114b1ecdf32a6044ec91c5987c1d66806c1d408a4e3d46569eb41d69a0acb8296601d7c203d9f1d
752 lines
26 KiB
C++
752 lines
26 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <netbase.h>
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#include <compat.h>
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#include <sync.h>
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#include <tinyformat.h>
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#include <util/sock.h>
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#include <util/strencodings.h>
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#include <util/string.h>
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#include <util/system.h>
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#include <util/time.h>
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#include <atomic>
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#include <chrono>
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#include <cstdint>
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#include <functional>
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#include <memory>
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#ifndef WIN32
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#include <fcntl.h>
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#endif
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#ifdef USE_POLL
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#include <poll.h>
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#endif
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// Settings
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static Mutex g_proxyinfo_mutex;
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static proxyType proxyInfo[NET_MAX] GUARDED_BY(g_proxyinfo_mutex);
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static proxyType nameProxy GUARDED_BY(g_proxyinfo_mutex);
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int nConnectTimeout = DEFAULT_CONNECT_TIMEOUT;
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bool fNameLookup = DEFAULT_NAME_LOOKUP;
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// Need ample time for negotiation for very slow proxies such as Tor (milliseconds)
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int g_socks5_recv_timeout = 20 * 1000;
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static std::atomic<bool> interruptSocks5Recv(false);
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std::vector<CNetAddr> WrappedGetAddrInfo(const std::string& name, bool allow_lookup)
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{
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addrinfo ai_hint{};
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// We want a TCP port, which is a streaming socket type
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ai_hint.ai_socktype = SOCK_STREAM;
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ai_hint.ai_protocol = IPPROTO_TCP;
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// We don't care which address family (IPv4 or IPv6) is returned
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ai_hint.ai_family = AF_UNSPEC;
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// If we allow lookups of hostnames, use the AI_ADDRCONFIG flag to only
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// return addresses whose family we have an address configured for.
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//
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// If we don't allow lookups, then use the AI_NUMERICHOST flag for
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// getaddrinfo to only decode numerical network addresses and suppress
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// hostname lookups.
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ai_hint.ai_flags = allow_lookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
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addrinfo* ai_res{nullptr};
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const int n_err{getaddrinfo(name.c_str(), nullptr, &ai_hint, &ai_res)};
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if (n_err != 0) {
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return {};
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}
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// Traverse the linked list starting with ai_trav.
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addrinfo* ai_trav{ai_res};
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std::vector<CNetAddr> resolved_addresses;
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while (ai_trav != nullptr) {
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if (ai_trav->ai_family == AF_INET) {
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assert(ai_trav->ai_addrlen >= sizeof(sockaddr_in));
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resolved_addresses.emplace_back(reinterpret_cast<sockaddr_in*>(ai_trav->ai_addr)->sin_addr);
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}
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if (ai_trav->ai_family == AF_INET6) {
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assert(ai_trav->ai_addrlen >= sizeof(sockaddr_in6));
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const sockaddr_in6* s6{reinterpret_cast<sockaddr_in6*>(ai_trav->ai_addr)};
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resolved_addresses.emplace_back(s6->sin6_addr, s6->sin6_scope_id);
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}
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ai_trav = ai_trav->ai_next;
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}
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freeaddrinfo(ai_res);
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return resolved_addresses;
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}
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DNSLookupFn g_dns_lookup{WrappedGetAddrInfo};
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enum Network ParseNetwork(const std::string& net_in) {
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std::string net = ToLower(net_in);
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if (net == "ipv4") return NET_IPV4;
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if (net == "ipv6") return NET_IPV6;
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if (net == "onion") return NET_ONION;
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if (net == "tor") {
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LogPrintf("Warning: net name 'tor' is deprecated and will be removed in the future. You should use 'onion' instead.\n");
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return NET_ONION;
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}
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if (net == "i2p") {
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return NET_I2P;
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}
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return NET_UNROUTABLE;
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}
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std::string GetNetworkName(enum Network net)
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{
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switch (net) {
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case NET_UNROUTABLE: return "not_publicly_routable";
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case NET_IPV4: return "ipv4";
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case NET_IPV6: return "ipv6";
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case NET_ONION: return "onion";
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case NET_I2P: return "i2p";
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case NET_CJDNS: return "cjdns";
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case NET_INTERNAL: return "internal";
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case NET_MAX: assert(false);
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} // no default case, so the compiler can warn about missing cases
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assert(false);
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}
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std::vector<std::string> GetNetworkNames(bool append_unroutable)
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{
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std::vector<std::string> names;
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for (int n = 0; n < NET_MAX; ++n) {
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const enum Network network{static_cast<Network>(n)};
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if (network == NET_UNROUTABLE || network == NET_CJDNS || network == NET_INTERNAL) continue;
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names.emplace_back(GetNetworkName(network));
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}
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if (append_unroutable) {
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names.emplace_back(GetNetworkName(NET_UNROUTABLE));
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}
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return names;
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}
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static bool LookupIntern(const std::string& name, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup, DNSLookupFn dns_lookup_function)
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{
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vIP.clear();
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if (!ValidAsCString(name)) {
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return false;
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}
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{
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CNetAddr addr;
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// From our perspective, onion addresses are not hostnames but rather
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// direct encodings of CNetAddr much like IPv4 dotted-decimal notation
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// or IPv6 colon-separated hextet notation. Since we can't use
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// getaddrinfo to decode them and it wouldn't make sense to resolve
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// them, we return a network address representing it instead. See
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// CNetAddr::SetSpecial(const std::string&) for more details.
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if (addr.SetSpecial(name)) {
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vIP.push_back(addr);
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return true;
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}
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}
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for (const CNetAddr& resolved : dns_lookup_function(name, fAllowLookup)) {
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if (nMaxSolutions > 0 && vIP.size() >= nMaxSolutions) {
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break;
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}
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/* Never allow resolving to an internal address. Consider any such result invalid */
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if (!resolved.IsInternal()) {
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vIP.push_back(resolved);
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}
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}
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return (vIP.size() > 0);
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}
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bool LookupHost(const std::string& name, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup, DNSLookupFn dns_lookup_function)
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{
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if (!ValidAsCString(name)) {
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return false;
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}
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std::string strHost = name;
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if (strHost.empty())
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return false;
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if (strHost.front() == '[' && strHost.back() == ']') {
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strHost = strHost.substr(1, strHost.size() - 2);
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}
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return LookupIntern(strHost, vIP, nMaxSolutions, fAllowLookup, dns_lookup_function);
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}
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bool LookupHost(const std::string& name, CNetAddr& addr, bool fAllowLookup, DNSLookupFn dns_lookup_function)
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{
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if (!ValidAsCString(name)) {
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return false;
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}
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std::vector<CNetAddr> vIP;
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LookupHost(name, vIP, 1, fAllowLookup, dns_lookup_function);
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if(vIP.empty())
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return false;
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addr = vIP.front();
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return true;
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}
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bool Lookup(const std::string& name, std::vector<CService>& vAddr, uint16_t portDefault, bool fAllowLookup, unsigned int nMaxSolutions, DNSLookupFn dns_lookup_function)
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{
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if (name.empty() || !ValidAsCString(name)) {
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return false;
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}
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uint16_t port{portDefault};
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std::string hostname;
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SplitHostPort(name, port, hostname);
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std::vector<CNetAddr> vIP;
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bool fRet = LookupIntern(hostname, vIP, nMaxSolutions, fAllowLookup, dns_lookup_function);
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if (!fRet)
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return false;
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vAddr.resize(vIP.size());
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for (unsigned int i = 0; i < vIP.size(); i++)
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vAddr[i] = CService(vIP[i], port);
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return true;
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}
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bool Lookup(const std::string& name, CService& addr, uint16_t portDefault, bool fAllowLookup, DNSLookupFn dns_lookup_function)
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{
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if (!ValidAsCString(name)) {
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return false;
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}
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std::vector<CService> vService;
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bool fRet = Lookup(name, vService, portDefault, fAllowLookup, 1, dns_lookup_function);
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if (!fRet)
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return false;
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addr = vService[0];
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return true;
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}
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CService LookupNumeric(const std::string& name, uint16_t portDefault, DNSLookupFn dns_lookup_function)
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{
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if (!ValidAsCString(name)) {
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return {};
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}
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CService addr;
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// "1.2:345" will fail to resolve the ip, but will still set the port.
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// If the ip fails to resolve, re-init the result.
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if(!Lookup(name, addr, portDefault, false, dns_lookup_function))
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addr = CService();
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return addr;
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}
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/** SOCKS version */
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enum SOCKSVersion: uint8_t {
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SOCKS4 = 0x04,
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SOCKS5 = 0x05
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};
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/** Values defined for METHOD in RFC1928 */
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enum SOCKS5Method: uint8_t {
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NOAUTH = 0x00, //!< No authentication required
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GSSAPI = 0x01, //!< GSSAPI
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USER_PASS = 0x02, //!< Username/password
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NO_ACCEPTABLE = 0xff, //!< No acceptable methods
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};
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/** Values defined for CMD in RFC1928 */
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enum SOCKS5Command: uint8_t {
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CONNECT = 0x01,
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BIND = 0x02,
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UDP_ASSOCIATE = 0x03
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};
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/** Values defined for REP in RFC1928 */
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enum SOCKS5Reply: uint8_t {
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SUCCEEDED = 0x00, //!< Succeeded
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GENFAILURE = 0x01, //!< General failure
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NOTALLOWED = 0x02, //!< Connection not allowed by ruleset
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NETUNREACHABLE = 0x03, //!< Network unreachable
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HOSTUNREACHABLE = 0x04, //!< Network unreachable
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CONNREFUSED = 0x05, //!< Connection refused
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TTLEXPIRED = 0x06, //!< TTL expired
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CMDUNSUPPORTED = 0x07, //!< Command not supported
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ATYPEUNSUPPORTED = 0x08, //!< Address type not supported
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};
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/** Values defined for ATYPE in RFC1928 */
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enum SOCKS5Atyp: uint8_t {
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IPV4 = 0x01,
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DOMAINNAME = 0x03,
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IPV6 = 0x04,
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};
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/** Status codes that can be returned by InterruptibleRecv */
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enum class IntrRecvError {
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OK,
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Timeout,
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Disconnected,
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NetworkError,
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Interrupted
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};
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/**
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* Try to read a specified number of bytes from a socket. Please read the "see
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* also" section for more detail.
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*
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* @param data The buffer where the read bytes should be stored.
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* @param len The number of bytes to read into the specified buffer.
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* @param timeout The total timeout in milliseconds for this read.
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* @param sock The socket (has to be in non-blocking mode) from which to read bytes.
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*
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* @returns An IntrRecvError indicating the resulting status of this read.
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* IntrRecvError::OK only if all of the specified number of bytes were
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* read.
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*
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* @see This function can be interrupted by calling InterruptSocks5(bool).
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* Sockets can be made non-blocking with SetSocketNonBlocking(const
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* SOCKET&, bool).
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*/
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static IntrRecvError InterruptibleRecv(uint8_t* data, size_t len, int timeout, const Sock& sock)
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{
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int64_t curTime = GetTimeMillis();
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int64_t endTime = curTime + timeout;
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while (len > 0 && curTime < endTime) {
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ssize_t ret = sock.Recv(data, len, 0); // Optimistically try the recv first
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if (ret > 0) {
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len -= ret;
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data += ret;
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} else if (ret == 0) { // Unexpected disconnection
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return IntrRecvError::Disconnected;
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} else { // Other error or blocking
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int nErr = WSAGetLastError();
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if (nErr == WSAEINPROGRESS || nErr == WSAEWOULDBLOCK || nErr == WSAEINVAL) {
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// Only wait at most MAX_WAIT_FOR_IO at a time, unless
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// we're approaching the end of the specified total timeout
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const auto remaining = std::chrono::milliseconds{endTime - curTime};
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const auto timeout = std::min(remaining, std::chrono::milliseconds{MAX_WAIT_FOR_IO});
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if (!sock.Wait(timeout, Sock::RECV)) {
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return IntrRecvError::NetworkError;
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}
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} else {
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return IntrRecvError::NetworkError;
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}
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}
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if (interruptSocks5Recv)
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return IntrRecvError::Interrupted;
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curTime = GetTimeMillis();
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}
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return len == 0 ? IntrRecvError::OK : IntrRecvError::Timeout;
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}
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/** Convert SOCKS5 reply to an error message */
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static std::string Socks5ErrorString(uint8_t err)
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{
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switch(err) {
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case SOCKS5Reply::GENFAILURE:
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return "general failure";
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case SOCKS5Reply::NOTALLOWED:
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return "connection not allowed";
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case SOCKS5Reply::NETUNREACHABLE:
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return "network unreachable";
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case SOCKS5Reply::HOSTUNREACHABLE:
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return "host unreachable";
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case SOCKS5Reply::CONNREFUSED:
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return "connection refused";
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case SOCKS5Reply::TTLEXPIRED:
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return "TTL expired";
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case SOCKS5Reply::CMDUNSUPPORTED:
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return "protocol error";
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case SOCKS5Reply::ATYPEUNSUPPORTED:
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return "address type not supported";
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default:
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return "unknown";
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}
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}
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bool Socks5(const std::string& strDest, uint16_t port, const ProxyCredentials* auth, const Sock& sock)
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{
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IntrRecvError recvr;
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LogPrint(BCLog::NET, "SOCKS5 connecting %s\n", strDest);
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if (strDest.size() > 255) {
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return error("Hostname too long");
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}
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// Construct the version identifier/method selection message
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std::vector<uint8_t> vSocks5Init;
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vSocks5Init.push_back(SOCKSVersion::SOCKS5); // We want the SOCK5 protocol
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if (auth) {
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vSocks5Init.push_back(0x02); // 2 method identifiers follow...
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vSocks5Init.push_back(SOCKS5Method::NOAUTH);
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vSocks5Init.push_back(SOCKS5Method::USER_PASS);
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} else {
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vSocks5Init.push_back(0x01); // 1 method identifier follows...
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vSocks5Init.push_back(SOCKS5Method::NOAUTH);
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}
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ssize_t ret = sock.Send(vSocks5Init.data(), vSocks5Init.size(), MSG_NOSIGNAL);
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if (ret != (ssize_t)vSocks5Init.size()) {
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return error("Error sending to proxy");
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}
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uint8_t pchRet1[2];
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if ((recvr = InterruptibleRecv(pchRet1, 2, g_socks5_recv_timeout, sock)) != IntrRecvError::OK) {
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LogPrintf("Socks5() connect to %s:%d failed: InterruptibleRecv() timeout or other failure\n", strDest, port);
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return false;
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}
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if (pchRet1[0] != SOCKSVersion::SOCKS5) {
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return error("Proxy failed to initialize");
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}
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if (pchRet1[1] == SOCKS5Method::USER_PASS && auth) {
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// Perform username/password authentication (as described in RFC1929)
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std::vector<uint8_t> vAuth;
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vAuth.push_back(0x01); // Current (and only) version of user/pass subnegotiation
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if (auth->username.size() > 255 || auth->password.size() > 255)
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return error("Proxy username or password too long");
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vAuth.push_back(auth->username.size());
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vAuth.insert(vAuth.end(), auth->username.begin(), auth->username.end());
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vAuth.push_back(auth->password.size());
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vAuth.insert(vAuth.end(), auth->password.begin(), auth->password.end());
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ret = sock.Send(vAuth.data(), vAuth.size(), MSG_NOSIGNAL);
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if (ret != (ssize_t)vAuth.size()) {
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return error("Error sending authentication to proxy");
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}
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LogPrint(BCLog::PROXY, "SOCKS5 sending proxy authentication %s:%s\n", auth->username, auth->password);
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uint8_t pchRetA[2];
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if ((recvr = InterruptibleRecv(pchRetA, 2, g_socks5_recv_timeout, sock)) != IntrRecvError::OK) {
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return error("Error reading proxy authentication response");
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}
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if (pchRetA[0] != 0x01 || pchRetA[1] != 0x00) {
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return error("Proxy authentication unsuccessful");
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}
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} else if (pchRet1[1] == SOCKS5Method::NOAUTH) {
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// Perform no authentication
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} else {
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return error("Proxy requested wrong authentication method %02x", pchRet1[1]);
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}
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std::vector<uint8_t> vSocks5;
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vSocks5.push_back(SOCKSVersion::SOCKS5); // VER protocol version
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vSocks5.push_back(SOCKS5Command::CONNECT); // CMD CONNECT
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vSocks5.push_back(0x00); // RSV Reserved must be 0
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vSocks5.push_back(SOCKS5Atyp::DOMAINNAME); // ATYP DOMAINNAME
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vSocks5.push_back(strDest.size()); // Length<=255 is checked at beginning of function
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vSocks5.insert(vSocks5.end(), strDest.begin(), strDest.end());
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vSocks5.push_back((port >> 8) & 0xFF);
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vSocks5.push_back((port >> 0) & 0xFF);
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ret = sock.Send(vSocks5.data(), vSocks5.size(), MSG_NOSIGNAL);
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if (ret != (ssize_t)vSocks5.size()) {
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return error("Error sending to proxy");
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}
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uint8_t pchRet2[4];
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if ((recvr = InterruptibleRecv(pchRet2, 4, g_socks5_recv_timeout, sock)) != IntrRecvError::OK) {
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if (recvr == IntrRecvError::Timeout) {
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/* If a timeout happens here, this effectively means we timed out while connecting
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* to the remote node. This is very common for Tor, so do not print an
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* error message. */
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return false;
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} else {
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return error("Error while reading proxy response");
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}
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}
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if (pchRet2[0] != SOCKSVersion::SOCKS5) {
|
|
return error("Proxy failed to accept request");
|
|
}
|
|
if (pchRet2[1] != SOCKS5Reply::SUCCEEDED) {
|
|
// Failures to connect to a peer that are not proxy errors
|
|
LogPrintf("Socks5() connect to %s:%d failed: %s\n", strDest, port, Socks5ErrorString(pchRet2[1]));
|
|
return false;
|
|
}
|
|
if (pchRet2[2] != 0x00) { // Reserved field must be 0
|
|
return error("Error: malformed proxy response");
|
|
}
|
|
uint8_t pchRet3[256];
|
|
switch (pchRet2[3])
|
|
{
|
|
case SOCKS5Atyp::IPV4: recvr = InterruptibleRecv(pchRet3, 4, g_socks5_recv_timeout, sock); break;
|
|
case SOCKS5Atyp::IPV6: recvr = InterruptibleRecv(pchRet3, 16, g_socks5_recv_timeout, sock); break;
|
|
case SOCKS5Atyp::DOMAINNAME:
|
|
{
|
|
recvr = InterruptibleRecv(pchRet3, 1, g_socks5_recv_timeout, sock);
|
|
if (recvr != IntrRecvError::OK) {
|
|
return error("Error reading from proxy");
|
|
}
|
|
int nRecv = pchRet3[0];
|
|
recvr = InterruptibleRecv(pchRet3, nRecv, g_socks5_recv_timeout, sock);
|
|
break;
|
|
}
|
|
default: return error("Error: malformed proxy response");
|
|
}
|
|
if (recvr != IntrRecvError::OK) {
|
|
return error("Error reading from proxy");
|
|
}
|
|
if ((recvr = InterruptibleRecv(pchRet3, 2, g_socks5_recv_timeout, sock)) != IntrRecvError::OK) {
|
|
return error("Error reading from proxy");
|
|
}
|
|
LogPrint(BCLog::NET, "SOCKS5 connected %s\n", strDest);
|
|
return true;
|
|
}
|
|
|
|
std::unique_ptr<Sock> CreateSockTCP(const CService& address_family)
|
|
{
|
|
// Create a sockaddr from the specified service.
|
|
struct sockaddr_storage sockaddr;
|
|
socklen_t len = sizeof(sockaddr);
|
|
if (!address_family.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
|
|
LogPrintf("Cannot create socket for %s: unsupported network\n", address_family.ToString());
|
|
return nullptr;
|
|
}
|
|
|
|
// Create a TCP socket in the address family of the specified service.
|
|
SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
|
|
if (hSocket == INVALID_SOCKET) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Ensure that waiting for I/O on this socket won't result in undefined
|
|
// behavior.
|
|
if (!IsSelectableSocket(hSocket)) {
|
|
CloseSocket(hSocket);
|
|
LogPrintf("Cannot create connection: non-selectable socket created (fd >= FD_SETSIZE ?)\n");
|
|
return nullptr;
|
|
}
|
|
|
|
#ifdef SO_NOSIGPIPE
|
|
int set = 1;
|
|
// Set the no-sigpipe option on the socket for BSD systems, other UNIXes
|
|
// should use the MSG_NOSIGNAL flag for every send.
|
|
setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
|
|
#endif
|
|
|
|
// Set the no-delay option (disable Nagle's algorithm) on the TCP socket.
|
|
SetSocketNoDelay(hSocket);
|
|
|
|
// Set the non-blocking option on the socket.
|
|
if (!SetSocketNonBlocking(hSocket, true)) {
|
|
CloseSocket(hSocket);
|
|
LogPrintf("Error setting socket to non-blocking: %s\n", NetworkErrorString(WSAGetLastError()));
|
|
return nullptr;
|
|
}
|
|
return std::make_unique<Sock>(hSocket);
|
|
}
|
|
|
|
std::function<std::unique_ptr<Sock>(const CService&)> CreateSock = CreateSockTCP;
|
|
|
|
template<typename... Args>
|
|
static void LogConnectFailure(bool manual_connection, const char* fmt, const Args&... args) {
|
|
std::string error_message = tfm::format(fmt, args...);
|
|
if (manual_connection) {
|
|
LogPrintf("%s\n", error_message);
|
|
} else {
|
|
LogPrint(BCLog::NET, "%s\n", error_message);
|
|
}
|
|
}
|
|
|
|
bool ConnectSocketDirectly(const CService &addrConnect, const Sock& sock, int nTimeout, bool manual_connection)
|
|
{
|
|
// Create a sockaddr from the specified service.
|
|
struct sockaddr_storage sockaddr;
|
|
socklen_t len = sizeof(sockaddr);
|
|
if (sock.Get() == INVALID_SOCKET) {
|
|
LogPrintf("Cannot connect to %s: invalid socket\n", addrConnect.ToString());
|
|
return false;
|
|
}
|
|
if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
|
|
LogPrintf("Cannot connect to %s: unsupported network\n", addrConnect.ToString());
|
|
return false;
|
|
}
|
|
|
|
// Connect to the addrConnect service on the hSocket socket.
|
|
if (sock.Connect(reinterpret_cast<struct sockaddr*>(&sockaddr), len) == SOCKET_ERROR) {
|
|
int nErr = WSAGetLastError();
|
|
// WSAEINVAL is here because some legacy version of winsock uses it
|
|
if (nErr == WSAEINPROGRESS || nErr == WSAEWOULDBLOCK || nErr == WSAEINVAL)
|
|
{
|
|
// Connection didn't actually fail, but is being established
|
|
// asynchronously. Thus, use async I/O api (select/poll)
|
|
// synchronously to check for successful connection with a timeout.
|
|
const Sock::Event requested = Sock::RECV | Sock::SEND;
|
|
Sock::Event occurred;
|
|
if (!sock.Wait(std::chrono::milliseconds{nTimeout}, requested, &occurred)) {
|
|
LogPrintf("wait for connect to %s failed: %s\n",
|
|
addrConnect.ToString(),
|
|
NetworkErrorString(WSAGetLastError()));
|
|
return false;
|
|
} else if (occurred == 0) {
|
|
LogPrint(BCLog::NET, "connection attempt to %s timed out\n", addrConnect.ToString());
|
|
return false;
|
|
}
|
|
|
|
// Even if the wait was successful, the connect might not
|
|
// have been successful. The reason for this failure is hidden away
|
|
// in the SO_ERROR for the socket in modern systems. We read it into
|
|
// sockerr here.
|
|
int sockerr;
|
|
socklen_t sockerr_len = sizeof(sockerr);
|
|
if (sock.GetSockOpt(SOL_SOCKET, SO_ERROR, (sockopt_arg_type)&sockerr, &sockerr_len) ==
|
|
SOCKET_ERROR) {
|
|
LogPrintf("getsockopt() for %s failed: %s\n", addrConnect.ToString(), NetworkErrorString(WSAGetLastError()));
|
|
return false;
|
|
}
|
|
if (sockerr != 0) {
|
|
LogConnectFailure(manual_connection,
|
|
"connect() to %s failed after wait: %s",
|
|
addrConnect.ToString(),
|
|
NetworkErrorString(sockerr));
|
|
return false;
|
|
}
|
|
}
|
|
#ifdef WIN32
|
|
else if (WSAGetLastError() != WSAEISCONN)
|
|
#else
|
|
else
|
|
#endif
|
|
{
|
|
LogConnectFailure(manual_connection, "connect() to %s failed: %s", addrConnect.ToString(), NetworkErrorString(WSAGetLastError()));
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool SetProxy(enum Network net, const proxyType &addrProxy) {
|
|
assert(net >= 0 && net < NET_MAX);
|
|
if (!addrProxy.IsValid())
|
|
return false;
|
|
LOCK(g_proxyinfo_mutex);
|
|
proxyInfo[net] = addrProxy;
|
|
return true;
|
|
}
|
|
|
|
bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
|
|
assert(net >= 0 && net < NET_MAX);
|
|
LOCK(g_proxyinfo_mutex);
|
|
if (!proxyInfo[net].IsValid())
|
|
return false;
|
|
proxyInfoOut = proxyInfo[net];
|
|
return true;
|
|
}
|
|
|
|
bool SetNameProxy(const proxyType &addrProxy) {
|
|
if (!addrProxy.IsValid())
|
|
return false;
|
|
LOCK(g_proxyinfo_mutex);
|
|
nameProxy = addrProxy;
|
|
return true;
|
|
}
|
|
|
|
bool GetNameProxy(proxyType &nameProxyOut) {
|
|
LOCK(g_proxyinfo_mutex);
|
|
if(!nameProxy.IsValid())
|
|
return false;
|
|
nameProxyOut = nameProxy;
|
|
return true;
|
|
}
|
|
|
|
bool HaveNameProxy() {
|
|
LOCK(g_proxyinfo_mutex);
|
|
return nameProxy.IsValid();
|
|
}
|
|
|
|
bool IsProxy(const CNetAddr &addr) {
|
|
LOCK(g_proxyinfo_mutex);
|
|
for (int i = 0; i < NET_MAX; i++) {
|
|
if (addr == static_cast<CNetAddr>(proxyInfo[i].proxy))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool ConnectThroughProxy(const proxyType& proxy, const std::string& strDest, uint16_t port, const Sock& sock, int nTimeout, bool& outProxyConnectionFailed)
|
|
{
|
|
// first connect to proxy server
|
|
if (!ConnectSocketDirectly(proxy.proxy, sock, nTimeout, true)) {
|
|
outProxyConnectionFailed = true;
|
|
return false;
|
|
}
|
|
// do socks negotiation
|
|
if (proxy.randomize_credentials) {
|
|
ProxyCredentials random_auth;
|
|
static std::atomic_int counter(0);
|
|
random_auth.username = random_auth.password = strprintf("%i", counter++);
|
|
if (!Socks5(strDest, port, &random_auth, sock)) {
|
|
return false;
|
|
}
|
|
} else {
|
|
if (!Socks5(strDest, port, 0, sock)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool LookupSubNet(const std::string& strSubnet, CSubNet& ret, DNSLookupFn dns_lookup_function)
|
|
{
|
|
if (!ValidAsCString(strSubnet)) {
|
|
return false;
|
|
}
|
|
size_t slash = strSubnet.find_last_of('/');
|
|
CNetAddr network;
|
|
|
|
std::string strAddress = strSubnet.substr(0, slash);
|
|
if (LookupHost(strAddress, network, false, dns_lookup_function))
|
|
{
|
|
if (slash != strSubnet.npos)
|
|
{
|
|
std::string strNetmask = strSubnet.substr(slash + 1);
|
|
uint8_t n;
|
|
if (ParseUInt8(strNetmask, &n)) {
|
|
// If valid number, assume CIDR variable-length subnet masking
|
|
ret = CSubNet(network, n);
|
|
return ret.IsValid();
|
|
}
|
|
else // If not a valid number, try full netmask syntax
|
|
{
|
|
CNetAddr netmask;
|
|
// Never allow lookup for netmask
|
|
if (LookupHost(strNetmask, netmask, false, dns_lookup_function)) {
|
|
ret = CSubNet(network, netmask);
|
|
return ret.IsValid();
|
|
}
|
|
}
|
|
}
|
|
else // Single IP subnet (<ipv4>/32 or <ipv6>/128)
|
|
{
|
|
ret = CSubNet(network);
|
|
return ret.IsValid();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool SetSocketNonBlocking(const SOCKET& hSocket, bool fNonBlocking)
|
|
{
|
|
if (fNonBlocking) {
|
|
#ifdef WIN32
|
|
u_long nOne = 1;
|
|
if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR) {
|
|
#else
|
|
int fFlags = fcntl(hSocket, F_GETFL, 0);
|
|
if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == SOCKET_ERROR) {
|
|
#endif
|
|
return false;
|
|
}
|
|
} else {
|
|
#ifdef WIN32
|
|
u_long nZero = 0;
|
|
if (ioctlsocket(hSocket, FIONBIO, &nZero) == SOCKET_ERROR) {
|
|
#else
|
|
int fFlags = fcntl(hSocket, F_GETFL, 0);
|
|
if (fcntl(hSocket, F_SETFL, fFlags & ~O_NONBLOCK) == SOCKET_ERROR) {
|
|
#endif
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool SetSocketNoDelay(const SOCKET& hSocket)
|
|
{
|
|
int set = 1;
|
|
int rc = setsockopt(hSocket, IPPROTO_TCP, TCP_NODELAY, (const char*)&set, sizeof(int));
|
|
return rc == 0;
|
|
}
|
|
|
|
void InterruptSocks5(bool interrupt)
|
|
{
|
|
interruptSocks5Recv = interrupt;
|
|
}
|