diff --git a/src/netbase.cpp b/src/netbase.cpp
index 19ab2d220..10b1f5124 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -1,785 +1,788 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <netbase.h>
#include <hash.h>
#include <random.h>
#include <sync.h>
#include <uint256.h>
#include <util.h>
#include <utilstrencodings.h>
#include <atomic>
#ifndef WIN32
#include <fcntl.h>
#endif
#if !defined(MSG_NOSIGNAL)
#define MSG_NOSIGNAL 0
#endif
// Settings
static proxyType proxyInfo[NET_MAX];
static proxyType nameProxy;
static CCriticalSection cs_proxyInfos;
int nConnectTimeout = DEFAULT_CONNECT_TIMEOUT;
bool fNameLookup = DEFAULT_NAME_LOOKUP;
// Need ample time for negotiation for very slow proxies such as Tor
// (milliseconds)
static const int SOCKS5_RECV_TIMEOUT = 20 * 1000;
static std::atomic<bool> interruptSocks5Recv(false);
enum Network ParseNetwork(std::string net) {
Downcase(net);
if (net == "ipv4") {
return NET_IPV4;
}
if (net == "ipv6") {
return NET_IPV6;
}
if (net == "onion") {
return NET_ONION;
}
if (net == "tor") {
LogPrintf("Warning: net name 'tor' is deprecated and will be removed "
"in the future. You should use 'onion' instead.\n");
return NET_ONION;
}
return NET_UNROUTABLE;
}
std::string GetNetworkName(enum Network net) {
switch (net) {
case NET_IPV4:
return "ipv4";
case NET_IPV6:
return "ipv6";
case NET_ONION:
return "onion";
default:
return "";
}
}
static bool LookupIntern(const char *pszName, std::vector<CNetAddr> &vIP,
unsigned int nMaxSolutions, bool fAllowLookup) {
vIP.clear();
{
CNetAddr addr;
if (addr.SetSpecial(std::string(pszName))) {
vIP.push_back(addr);
return true;
}
}
struct addrinfo aiHint;
memset(&aiHint, 0, sizeof(struct addrinfo));
aiHint.ai_socktype = SOCK_STREAM;
aiHint.ai_protocol = IPPROTO_TCP;
aiHint.ai_family = AF_UNSPEC;
#ifdef WIN32
aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
#else
aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
#endif
struct addrinfo *aiRes = nullptr;
int nErr = getaddrinfo(pszName, nullptr, &aiHint, &aiRes);
if (nErr) {
return false;
}
struct addrinfo *aiTrav = aiRes;
while (aiTrav != nullptr &&
(nMaxSolutions == 0 || vIP.size() < nMaxSolutions)) {
CNetAddr resolved;
if (aiTrav->ai_family == AF_INET) {
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
resolved =
CNetAddr(reinterpret_cast<struct sockaddr_in *>(aiTrav->ai_addr)
->sin_addr);
}
if (aiTrav->ai_family == AF_INET6) {
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
struct sockaddr_in6 *s6 =
reinterpret_cast<struct sockaddr_in6 *>(aiTrav->ai_addr);
resolved = CNetAddr(s6->sin6_addr, s6->sin6_scope_id);
}
// Never allow resolving to an internal address. Consider any such
// result invalid.
if (!resolved.IsInternal()) {
vIP.push_back(resolved);
}
aiTrav = aiTrav->ai_next;
}
freeaddrinfo(aiRes);
return (vIP.size() > 0);
}
bool LookupHost(const char *pszName, std::vector<CNetAddr> &vIP,
unsigned int nMaxSolutions, bool fAllowLookup) {
std::string strHost(pszName);
if (strHost.empty()) {
return false;
}
if (strHost.front() == '[' && strHost.back() == ']') {
strHost = strHost.substr(1, strHost.size() - 2);
}
return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup);
}
bool LookupHost(const char *pszName, CNetAddr &addr, bool fAllowLookup) {
std::vector<CNetAddr> vIP;
LookupHost(pszName, vIP, 1, fAllowLookup);
if (vIP.empty()) {
return false;
}
addr = vIP.front();
return true;
}
bool Lookup(const char *pszName, std::vector<CService> &vAddr, int portDefault,
bool fAllowLookup, unsigned int nMaxSolutions) {
if (pszName[0] == 0) {
return false;
}
int port = portDefault;
std::string hostname = "";
SplitHostPort(std::string(pszName), port, hostname);
std::vector<CNetAddr> vIP;
bool fRet =
LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
if (!fRet) {
return false;
}
vAddr.resize(vIP.size());
for (unsigned int i = 0; i < vIP.size(); i++) {
vAddr[i] = CService(vIP[i], port);
}
return true;
}
bool Lookup(const char *pszName, CService &addr, int portDefault,
bool fAllowLookup) {
std::vector<CService> vService;
bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
if (!fRet) {
return false;
}
addr = vService[0];
return true;
}
CService LookupNumeric(const char *pszName, int portDefault) {
CService addr;
// "1.2:345" will fail to resolve the ip, but will still set the port.
// If the ip fails to resolve, re-init the result.
if (!Lookup(pszName, addr, portDefault, false)) {
addr = CService();
}
return addr;
}
struct timeval MillisToTimeval(int64_t nTimeout) {
struct timeval timeout;
timeout.tv_sec = nTimeout / 1000;
timeout.tv_usec = (nTimeout % 1000) * 1000;
return timeout;
}
/** SOCKS version */
enum SOCKSVersion : uint8_t { SOCKS4 = 0x04, SOCKS5 = 0x05 };
/** Values defined for METHOD in RFC1928 */
enum SOCKS5Method : uint8_t {
NOAUTH = 0x00, //! No authentication required
GSSAPI = 0x01, //! GSSAPI
USER_PASS = 0x02, //! Username/password
NO_ACCEPTABLE = 0xff, //! No acceptable methods
};
/** Values defined for CMD in RFC1928 */
enum SOCKS5Command : uint8_t {
CONNECT = 0x01,
BIND = 0x02,
UDP_ASSOCIATE = 0x03
};
/** Values defined for REP in RFC1928 */
enum SOCKS5Reply : uint8_t {
SUCCEEDED = 0x00, //! Succeeded
GENFAILURE = 0x01, //! General failure
NOTALLOWED = 0x02, //! Connection not allowed by ruleset
NETUNREACHABLE = 0x03, //! Network unreachable
HOSTUNREACHABLE = 0x04, //! Network unreachable
CONNREFUSED = 0x05, //! Connection refused
TTLEXPIRED = 0x06, //! TTL expired
CMDUNSUPPORTED = 0x07, //! Command not supported
ATYPEUNSUPPORTED = 0x08, //! Address type not supported
};
/** Values defined for ATYPE in RFC1928 */
enum SOCKS5Atyp : uint8_t {
IPV4 = 0x01,
DOMAINNAME = 0x03,
IPV6 = 0x04,
};
/** Status codes that can be returned by InterruptibleRecv */
enum class IntrRecvError {
OK,
Timeout,
Disconnected,
NetworkError,
Interrupted
};
/**
* Read bytes from socket. This will either read the full number of bytes
* requested or return False on error or timeout.
* This function can be interrupted by calling InterruptSocks5()
*
* @param data Buffer to receive into
* @param len Length of data to receive
* @param timeout Timeout in milliseconds for receive operation
*
* @note This function requires that hSocket is in non-blocking mode.
*/
static IntrRecvError InterruptibleRecv(uint8_t *data, size_t len, int timeout,
const SOCKET &hSocket) {
int64_t curTime = GetTimeMillis();
int64_t endTime = curTime + timeout;
// Maximum time to wait in one select call. It will take up until this time
// (in millis) to break off in case of an interruption.
const int64_t maxWait = 1000;
while (len > 0 && curTime < endTime) {
// Optimistically try the recv first
ssize_t ret = recv(hSocket, (char *)data, len, 0);
if (ret > 0) {
len -= ret;
data += ret;
} else if (ret == 0) {
// Unexpected disconnection
return IntrRecvError::Disconnected;
} else {
// Other error or blocking
int nErr = WSAGetLastError();
if (nErr == WSAEINPROGRESS || nErr == WSAEWOULDBLOCK ||
nErr == WSAEINVAL) {
if (!IsSelectableSocket(hSocket)) {
return IntrRecvError::NetworkError;
}
struct timeval tval =
MillisToTimeval(std::min(endTime - curTime, maxWait));
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(hSocket, &fdset);
int nRet = select(hSocket + 1, &fdset, nullptr, nullptr, &tval);
if (nRet == SOCKET_ERROR) {
return IntrRecvError::NetworkError;
}
} else {
return IntrRecvError::NetworkError;
}
}
if (interruptSocks5Recv) {
return IntrRecvError::Interrupted;
}
curTime = GetTimeMillis();
}
return len == 0 ? IntrRecvError::OK : IntrRecvError::Timeout;
}
/** Credentials for proxy authentication */
struct ProxyCredentials {
std::string username;
std::string password;
};
/** Convert SOCKS5 reply to an error message */
static std::string Socks5ErrorString(uint8_t err) {
switch (err) {
case SOCKS5Reply::GENFAILURE:
return "general failure";
case SOCKS5Reply::NOTALLOWED:
return "connection not allowed";
case SOCKS5Reply::NETUNREACHABLE:
return "network unreachable";
case SOCKS5Reply::HOSTUNREACHABLE:
return "host unreachable";
case SOCKS5Reply::CONNREFUSED:
return "connection refused";
case SOCKS5Reply::TTLEXPIRED:
return "TTL expired";
case SOCKS5Reply::CMDUNSUPPORTED:
return "protocol error";
case SOCKS5Reply::ATYPEUNSUPPORTED:
return "address type not supported";
default:
return "unknown";
}
}
/** Connect using SOCKS5 (as described in RFC1928) */
static bool Socks5(const std::string &strDest, int port,
const ProxyCredentials *auth, const SOCKET &hSocket) {
IntrRecvError recvr;
LogPrint(BCLog::NET, "SOCKS5 connecting %s\n", strDest);
if (strDest.size() > 255) {
return error("Hostname too long");
}
// Accepted authentication methods
std::vector<uint8_t> vSocks5Init;
vSocks5Init.push_back(SOCKSVersion::SOCKS5);
if (auth) {
vSocks5Init.push_back(0x02); // Number of methods
vSocks5Init.push_back(SOCKS5Method::NOAUTH);
vSocks5Init.push_back(SOCKS5Method::USER_PASS);
} else {
vSocks5Init.push_back(0x01); // Number of methods
vSocks5Init.push_back(SOCKS5Method::NOAUTH);
}
ssize_t ret = send(hSocket, (const char *)vSocks5Init.data(),
vSocks5Init.size(), MSG_NOSIGNAL);
if (ret != (ssize_t)vSocks5Init.size()) {
return error("Error sending to proxy");
}
uint8_t pchRet1[2];
if ((recvr = InterruptibleRecv(pchRet1, 2, SOCKS5_RECV_TIMEOUT, hSocket)) !=
IntrRecvError::OK) {
LogPrintf("Socks5() connect to %s:%d failed: InterruptibleRecv() "
"timeout or other failure\n",
strDest, port);
return false;
}
if (pchRet1[0] != SOCKSVersion::SOCKS5) {
return error("Proxy failed to initialize");
}
if (pchRet1[1] == SOCKS5Method::USER_PASS && auth) {
// Perform username/password authentication (as described in RFC1929)
std::vector<uint8_t> vAuth;
// Current (and only) version of user/pass subnegotiation
vAuth.push_back(0x01);
if (auth->username.size() > 255 || auth->password.size() > 255) {
return error("Proxy username or password too long");
}
vAuth.push_back(auth->username.size());
vAuth.insert(vAuth.end(), auth->username.begin(), auth->username.end());
vAuth.push_back(auth->password.size());
vAuth.insert(vAuth.end(), auth->password.begin(), auth->password.end());
ret = send(hSocket, (const char *)vAuth.data(), vAuth.size(),
MSG_NOSIGNAL);
if (ret != (ssize_t)vAuth.size()) {
return error("Error sending authentication to proxy");
}
LogPrint(BCLog::PROXY, "SOCKS5 sending proxy authentication %s:%s\n",
auth->username, auth->password);
uint8_t pchRetA[2];
if ((recvr = InterruptibleRecv(pchRetA, 2, SOCKS5_RECV_TIMEOUT,
hSocket)) != IntrRecvError::OK) {
return error("Error reading proxy authentication response");
}
if (pchRetA[0] != 0x01 || pchRetA[1] != 0x00) {
return error("Proxy authentication unsuccessful");
}
} else if (pchRet1[1] == SOCKS5Method::NOAUTH) {
// Perform no authentication
} else {
return error("Proxy requested wrong authentication method %02x",
pchRet1[1]);
}
std::vector<uint8_t> vSocks5;
// VER protocol version
vSocks5.push_back(SOCKSVersion::SOCKS5);
// CMD CONNECT
vSocks5.push_back(SOCKS5Command::CONNECT);
// RSV Reserved must be 0
vSocks5.push_back(0x00);
// ATYP DOMAINNAME
vSocks5.push_back(SOCKS5Atyp::DOMAINNAME);
// Length<=255 is checked at beginning of function
vSocks5.push_back(strDest.size());
vSocks5.insert(vSocks5.end(), strDest.begin(), strDest.end());
vSocks5.push_back((port >> 8) & 0xFF);
vSocks5.push_back((port >> 0) & 0xFF);
ret = send(hSocket, (const char *)vSocks5.data(), vSocks5.size(),
MSG_NOSIGNAL);
if (ret != (ssize_t)vSocks5.size()) {
return error("Error sending to proxy");
}
uint8_t pchRet2[4];
if ((recvr = InterruptibleRecv(pchRet2, 4, SOCKS5_RECV_TIMEOUT, hSocket)) !=
IntrRecvError::OK) {
if (recvr == IntrRecvError::Timeout) {
/**
* If a timeout happens here, this effectively means we timed out
* while connecting to the remote node. This is very common for Tor,
* so do not print an error message.
*/
return false;
} else {
return error("Error while reading proxy response");
}
}
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;
}
// Reserved field must be 0
if (pchRet2[2] != 0x00) {
return error("Error: malformed proxy response");
}
uint8_t pchRet3[256];
switch (pchRet2[3]) {
case SOCKS5Atyp::IPV4:
recvr = InterruptibleRecv(pchRet3, 4, SOCKS5_RECV_TIMEOUT, hSocket);
break;
case SOCKS5Atyp::IPV6:
recvr =
InterruptibleRecv(pchRet3, 16, SOCKS5_RECV_TIMEOUT, hSocket);
break;
case SOCKS5Atyp::DOMAINNAME: {
recvr = InterruptibleRecv(pchRet3, 1, SOCKS5_RECV_TIMEOUT, hSocket);
if (recvr != IntrRecvError::OK) {
return error("Error reading from proxy");
}
int nRecv = pchRet3[0];
recvr =
InterruptibleRecv(pchRet3, nRecv, SOCKS5_RECV_TIMEOUT, hSocket);
break;
}
default:
return error("Error: malformed proxy response");
}
if (recvr != IntrRecvError::OK) {
return error("Error reading from proxy");
}
if ((recvr = InterruptibleRecv(pchRet3, 2, SOCKS5_RECV_TIMEOUT, hSocket)) !=
IntrRecvError::OK) {
return error("Error reading from proxy");
}
LogPrint(BCLog::NET, "SOCKS5 connected %s\n", strDest);
return true;
}
SOCKET CreateSocket(const CService &addrConnect) {
struct sockaddr_storage sockaddr;
socklen_t len = sizeof(sockaddr);
if (!addrConnect.GetSockAddr((struct sockaddr *)&sockaddr, &len)) {
LogPrintf("Cannot create socket for %s: unsupported network\n",
addrConnect.ToString());
return INVALID_SOCKET;
}
SOCKET hSocket = socket(((struct sockaddr *)&sockaddr)->sa_family,
SOCK_STREAM, IPPROTO_TCP);
if (hSocket == INVALID_SOCKET) {
return INVALID_SOCKET;
}
if (!IsSelectableSocket(hSocket)) {
CloseSocket(hSocket);
LogPrintf("Cannot create connection: non-selectable socket created (fd "
">= FD_SETSIZE ?)\n");
return INVALID_SOCKET;
}
#ifdef SO_NOSIGPIPE
int set = 1;
// Different way of disabling SIGPIPE on BSD
setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (sockopt_arg_type)&set,
sizeof(int));
#endif
// Disable Nagle's algorithm
SetSocketNoDelay(hSocket);
// Set to non-blocking
if (!SetSocketNonBlocking(hSocket, true)) {
CloseSocket(hSocket);
LogPrintf("ConnectSocketDirectly: Setting socket to non-blocking "
"failed, error %s\n",
NetworkErrorString(WSAGetLastError()));
}
return hSocket;
}
bool ConnectSocketDirectly(const CService &addrConnect, const SOCKET &hSocket,
int nTimeout) {
struct sockaddr_storage sockaddr;
socklen_t len = sizeof(sockaddr);
if (hSocket == 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;
}
if (connect(hSocket, (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) {
struct timeval timeout = MillisToTimeval(nTimeout);
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(hSocket, &fdset);
int nRet = select(hSocket + 1, nullptr, &fdset, nullptr, &timeout);
if (nRet == 0) {
LogPrint(BCLog::NET, "connection to %s timeout\n",
addrConnect.ToString());
return false;
}
if (nRet == SOCKET_ERROR) {
LogPrintf("select() for %s failed: %s\n",
addrConnect.ToString(),
NetworkErrorString(WSAGetLastError()));
return false;
}
socklen_t nRetSize = sizeof(nRet);
if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR,
(sockopt_arg_type)&nRet,
&nRetSize) == SOCKET_ERROR) {
LogPrintf("getsockopt() for %s failed: %s\n",
addrConnect.ToString(),
NetworkErrorString(WSAGetLastError()));
return false;
}
if (nRet != 0) {
LogPrintf("connect() to %s failed after select(): %s\n",
addrConnect.ToString(), NetworkErrorString(nRet));
return false;
}
}
#ifdef WIN32
else if (WSAGetLastError() != WSAEISCONN)
#else
else
#endif
{
LogPrintf("connect() to %s failed: %s\n", 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(cs_proxyInfos);
proxyInfo[net] = addrProxy;
return true;
}
bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
assert(net >= 0 && net < NET_MAX);
LOCK(cs_proxyInfos);
if (!proxyInfo[net].IsValid()) {
return false;
}
proxyInfoOut = proxyInfo[net];
return true;
}
bool SetNameProxy(const proxyType &addrProxy) {
if (!addrProxy.IsValid()) {
return false;
}
LOCK(cs_proxyInfos);
nameProxy = addrProxy;
return true;
}
bool GetNameProxy(proxyType &nameProxyOut) {
LOCK(cs_proxyInfos);
if (!nameProxy.IsValid()) {
return false;
}
nameProxyOut = nameProxy;
return true;
}
bool HaveNameProxy() {
LOCK(cs_proxyInfos);
return nameProxy.IsValid();
}
bool IsProxy(const CNetAddr &addr) {
LOCK(cs_proxyInfos);
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,
int port, const SOCKET &hSocket, int nTimeout,
bool *outProxyConnectionFailed) {
// first connect to proxy server
if (!ConnectSocketDirectly(proxy.proxy, hSocket, nTimeout)) {
if (outProxyConnectionFailed) {
*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, (unsigned short)port, &random_auth, hSocket)) {
return false;
}
} else if (!Socks5(strDest, (unsigned short)port, 0, hSocket)) {
return false;
}
return true;
}
bool LookupSubNet(const char *pszName, CSubNet &ret) {
std::string strSubnet(pszName);
size_t slash = strSubnet.find_last_of('/');
std::vector<CNetAddr> vIP;
std::string strAddress = strSubnet.substr(0, slash);
if (LookupHost(strAddress.c_str(), vIP, 1, false)) {
CNetAddr network = vIP[0];
if (slash != strSubnet.npos) {
std::string strNetmask = strSubnet.substr(slash + 1);
int32_t n;
// IPv4 addresses start at offset 12, and first 12 bytes must match,
// so just offset n
if (ParseInt32(strNetmask, &n)) {
// If valid number, assume /24 syntax
ret = CSubNet(network, n);
return ret.IsValid();
} else {
// If not a valid number, try full netmask syntax
// Never allow lookup for netmask
if (LookupHost(strNetmask.c_str(), vIP, 1, false)) {
ret = CSubNet(network, vIP[0]);
return ret.IsValid();
}
}
} else {
ret = CSubNet(network);
return ret.IsValid();
}
}
return false;
}
#ifdef WIN32
std::string NetworkErrorString(int err) {
char buf[256];
buf[0] = 0;
if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_MAX_WIDTH_MASK,
nullptr, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
buf, sizeof(buf), nullptr)) {
return strprintf("%s (%d)", buf, err);
} else {
return strprintf("Unknown error (%d)", err);
}
}
#else
std::string NetworkErrorString(int err) {
char buf[256];
- const char *s = buf;
buf[0] = 0;
-/* Too bad there are two incompatible implementations of the
- * thread-safe strerror. */
+ /**
+ * Too bad there are two incompatible implementations of the
+ * thread-safe strerror.
+ */
+ const char *s;
#ifdef STRERROR_R_CHAR_P
/* GNU variant can return a pointer outside the passed buffer */
s = strerror_r(err, buf, sizeof(buf));
#else
+ s = buf;
/* POSIX variant always returns message in buffer */
if (strerror_r(err, buf, sizeof(buf))) {
buf[0] = 0;
}
#endif
return strprintf("%s (%d)", s, err);
}
#endif
bool CloseSocket(SOCKET &hSocket) {
if (hSocket == INVALID_SOCKET) {
return false;
}
#ifdef WIN32
int ret = closesocket(hSocket);
#else
int ret = close(hSocket);
#endif
if (ret) {
LogPrintf("Socket close failed: %d. Error: %s\n", hSocket,
NetworkErrorString(WSAGetLastError()));
}
hSocket = INVALID_SOCKET;
return ret != SOCKET_ERROR;
}
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,
(sockopt_arg_type)&set, sizeof(int));
return rc == 0;
}
void InterruptSocks5(bool interrupt) {
interruptSocks5Recv = interrupt;
}