void
TCPConnection::StartAsyncConnect_(const String &ip_adress, int port)
{
IPAddress adress;
adress.TryParse(ip_adress, true);
tcp::endpoint ep;
ep.address(adress.GetAddress());
ep.port(port);
//// Check that we don't try to connect to a port we're listening on. Doing
//// that could start evil loops.
//tcp::endpoint endpoint = *endpoint_iterator;
if (LocalIPAddresses::Instance()->IsLocalPort(ep.address(), remote_port_))
{
String sMessage;
sMessage.Format(_T("Could not connect to %s on port %d since this would mean connecting to myself."), remote_ip_address_.c_str(), remote_port_);
OnCouldNotConnect(sMessage);
LOG_TCPIP(_T("TCPConnection - ") + sMessage);
return;
}
// Attempt a connection to the first endpoint in the list. Each endpoint
// will be tried until we successfully establish a connection.
socket_.async_connect(ep,
std::bind(&TCPConnection::AsyncConnectCompleted, shared_from_this(), std::placeholders::_1));
}
IPAddress
Utilities::GetIPAddressFromReceivedHeader(const String &sReceivedHeader)
{
/*
sFirstPart now contains the following
received = "Received" ":" ; one per relay
["from" domain] ; sending host
["by" domain] ; receiving host
["via" atom] ; physical path
*("with" atom) ; link/mail protocol
["id" msg-id] ; receiver msg id
["for" addr-spec] ; initial form
";" date-time ; time received
http://cr.yp.to/immhf/envelope.html
In theory, the value of a Received field is tokenizable.
In practice, SMTP servers put all sorts of badly formatted information into Received lines.
Hence: We only do a quick search
*/
int iFromPos = sReceivedHeader.Find(_T("from "));
if (iFromPos == -1)
{
// Could not locate IP address.
return IPAddress();
}
int iBracketPos = sReceivedHeader.Find(_T("["), iFromPos );
if (iBracketPos == -1)
{
// Could not locate IP address.
return IPAddress();
}
int iByPos = sReceivedHeader.Find(_T("by "));
if (iByPos >= 0 && iByPos < iBracketPos)
{
// Found from but no bracket.
return IPAddress();
}
int iBracketEndPos = sReceivedHeader.Find(_T("]"), iBracketPos);
int iIPLength = iBracketEndPos - iBracketPos - 1;
String sIPAddress = sReceivedHeader.Mid(iBracketPos + 1, iIPLength);
if (!StringParser::IsValidIPAddress(sIPAddress))
{
// Could not locate IP address
assert(0);
return IPAddress();
}
IPAddress address;
address.TryParse(sIPAddress);
return address;
}
bool
DNSResolver::GetPTRRecords(const String &sIP, std::vector<String> &vecFoundNames)
{
IPAddress address;
if (!address.TryParse(AnsiString(sIP), true))
return false;
if (address.GetType() == IPAddress::IPV4)
{
std::vector<String> vecItems = StringParser::SplitString(sIP, ".");
reverse(vecItems.begin(), vecItems.end());
String result = StringParser::JoinVector(vecItems, ".");
return Resolve_(result + ".in-addr.arpa", vecFoundNames, DNS_TYPE_PTR, 0);
}
else
{
AnsiString long_ipv6 = address.ToLongString();
long_ipv6.MakeReverse();
long_ipv6.Remove(':');
for (int i = long_ipv6.GetLength() - 1; i > 0; i--)
{
long_ipv6.insert(i, 1, '.');
}
return Resolve_(long_ipv6 + ".ip6.arpa", vecFoundNames, DNS_TYPE_PTR, 0);
}
}
bool
Utilities::IsLocalHost(const String &sHostname)
{
USES_CONVERSION;
SOCKADDR_IN addr;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(T2A(sHostname));
struct hostent *host;
if(addr.sin_addr.s_addr == INADDR_NONE)
{
host = NULL;
host = gethostbyname(T2A(sHostname));
if (!host)
return false;
memcpy(&addr.sin_addr, host->h_addr_list[0], host->h_length);
}
String sIPAddress = GetIPAddress(addr);
IPAddress address;
address.TryParse(sIPAddress);
if (LocalIPAddresses::Instance()->IsLocalIPAddress(address))
return true;
else
return false;
}
bool
TCPIPPort::SetAddress(const String &address)
{
IPAddress listeningAddress;
if (!listeningAddress.TryParse(address))
return false;
SetAddress(listeningAddress);
return true;
}
bool
TestConnect::PerformTest(const String &localAddressStr, const String &server, int port, String &result)
{
boost::asio::io_service io_service;
IPAddress localAddress;
if (!localAddressStr.IsEmpty())
{
if (!localAddress.TryParse(localAddressStr, false))
{
result.append(Formatter::Format("ERROR: Unable to parse address {0}.\r\n", localAddressStr));
return false;
}
else
result.append(Formatter::Format("Local address is {0}.\r\n", localAddress.ToString()));
}
result.append(Formatter::Format("Trying to connect to host {0}...\r\n", server));
// Get a list of endpoints corresponding to the server name.
tcp::resolver resolver(io_service);
tcp::resolver::query query(AnsiString(server), AnsiString(StringParser::IntToString(port)), tcp::resolver::query::numeric_service);
boost::system::error_code errorResolve = boost::asio::error::host_not_found;
tcp::resolver::iterator endpoint_iterator = resolver.resolve(query, errorResolve);
tcp::resolver::iterator end;
if (errorResolve || endpoint_iterator == end)
{
// Host was not found.
String formattedString;
formattedString.Format(_T("ERROR: The host name %s could not be resolved.\r\n"), server);
result.append(formattedString);
return false;
}
// Try each endpoint until we successfully establish a connection.
tcp::socket socket(io_service);
boost::system::error_code error = boost::asio::error::host_not_found;
while (error && endpoint_iterator != end)
{
boost::asio::ip::address adr = (*endpoint_iterator).endpoint().address();
String ipAddressString = adr.to_string();
String formattedString;
formattedString.Format(_T("Trying to connect to TCP/IP address %s on port %d.\r\n"), ipAddressString, port);
result.append(formattedString);
socket.close();
IPAddress emptyAddr;
bool any = emptyAddr.IsAny();
if (!localAddress.IsAny())
{
socket.open(boost::asio::ip::tcp::v4());
boost::system::error_code tempError;
socket.bind(boost::asio::ip::tcp::endpoint(localAddress.GetAddress(), 0), tempError);
if (tempError)
{
result.append(Formatter::Format("ERROR: Unable to bind to address {0}.\r\n", localAddress.ToString()));
socket.close();
return false;
}
}
socket.connect(*endpoint_iterator++, error);
}
if (error)
{
// We were unable to connect.
result.append(_T("ERROR: It was not possible to connect.\r\n"));
return false;
}
// Read the response status line.
boost::asio::streambuf response;
boost::asio::read_until(socket, response, "\r\n");
std::string s;
std::istream is(&response);
std::getline(is, s, '\r');
result.append(Formatter::Format("Received: {0}.\r\n", String(s)));
// Close the socket again.
socket.close();
result.append(_T("Connected successfully.\r\n"));
return true;
}
bool
TCPServer::HasIPV6()
{
IPAddress address;
return address.TryParse("::F", false);
}
void
LocalIPAddresses::LoadIPAddresses()
{
m_vecLocalPorts.clear();
std::vector<IPAddress> localAddresses;
char name[255];
if( gethostname ( name, sizeof(name)) == 0)
{
PHOSTENT hostinfo;
if((hostinfo = gethostbyname(name)) != NULL)
{
int nCount = 0;
while(hostinfo->h_addr_list[nCount])
{
char *ip = inet_ntoa(*(struct in_addr *)hostinfo->h_addr_list[nCount]);
IPAddress address;
if (address.TryParse(ip))
localAddresses.push_back(address);
nCount++;
}
}
}
boost::shared_ptr<TCPIPPorts> pTCPIPPorts = Configuration::Instance()->GetTCPIPPorts();
const vector<boost::shared_ptr<TCPIPPort> > vecTCPIPPorts = pTCPIPPorts->GetVector();
vector<boost::shared_ptr<TCPIPPort> >::const_iterator iter = vecTCPIPPorts.begin();
vector<boost::shared_ptr<TCPIPPort> >::const_iterator iterEnd = vecTCPIPPorts.end();
for (; iter != iterEnd; iter++)
{
boost::shared_ptr<TCPIPPort> pTCPIPPort = (*iter);
if (pTCPIPPort->GetAddress().IsAny())
{
int portNumber = pTCPIPPort->GetPortNumber();
std::vector<IPAddress>::iterator iter = localAddresses.begin();
std::vector<IPAddress>::iterator iterEnd = localAddresses.end();
for (; iter != iterEnd; iter++)
{
IPAddress address = (*iter);
m_vecLocalPorts.push_back(std::make_pair(address, portNumber));
m_vecLocalPorts.push_back(std::make_pair(IPAddress(), portNumber));
}
}
else
{
m_vecLocalPorts.push_back(std::make_pair(pTCPIPPort->GetAddress(), pTCPIPPort->GetPortNumber()));
}
}
}
bool
StringParser::IsValidIPAddress(const String &sAddress)
{
IPAddress address;
return address.TryParse(sAddress, false);
}
bool
TestConnect::PerformTest(ConnectionSecurity connection_security, const String &localAddressStr, const String &server, int port, String &result)
{
std::shared_ptr<IOService> io_service_wrapper = Application::Instance()->GetIOService();
IPAddress localAddress;
if (!localAddressStr.IsEmpty())
{
if (!localAddress.TryParse(localAddressStr, false))
{
result.append(Formatter::Format("ERROR: Unable to parse address {0}.\r\n", localAddressStr));
return false;
}
else
result.append(Formatter::Format("Local address is {0}.\r\n", localAddress.ToString()));
}
result.append(Formatter::Format("Trying to connect to host {0}...\r\n", server));
// Get a list of endpoints corresponding to the server name.
tcp::resolver resolver(io_service_wrapper->GetIOService());
tcp::resolver::query query(AnsiString(server), AnsiString(StringParser::IntToString(port)), tcp::resolver::query::numeric_service);
boost::system::error_code errorResolve = boost::asio::error::host_not_found;
tcp::resolver::iterator endpoint_iterator = resolver.resolve(query, errorResolve);
tcp::resolver::iterator end;
if (errorResolve || endpoint_iterator == end)
{
// Host was not found.
String formattedString;
formattedString.Format(_T("ERROR: The host name %s could not be resolved.\r\n"), server.c_str());
result.append(formattedString);
return false;
}
String last_error_message;
// Try each endpoint until we successfully establish a connection.
boost::system::error_code error = boost::asio::error::host_not_found;
while (error && endpoint_iterator != end)
{
boost::asio::ip::address adr = (*endpoint_iterator).endpoint().address();
String ipAddressString = adr.to_string();
String formattedString;
formattedString.Format(_T("Trying to connect to TCP/IP address %s on port %d.\r\n"), ipAddressString.c_str(), port);
result.append(formattedString);
std::shared_ptr<Event> disconnectEvent = std::shared_ptr<Event>(new Event());
std::shared_ptr<TestConnectionResult> connection_result = std::make_shared<TestConnectionResult>();
std::shared_ptr<TestConnection> connection = std::make_shared<TestConnection>(connection_security, io_service_wrapper->GetIOService(), io_service_wrapper->GetClientContext(), disconnectEvent, server, connection_result);
if (connection->Connect(ipAddressString, port, localAddress))
{
connection.reset();
disconnectEvent->Wait();
if (connection_result->GetConnectedSuccesfully())
{
result.append(_T("Connected successfully.\r\n"));
if (connection_security == CSSSL)
{
if (connection_result->GetHandshakeCompletedSuccesfully())
{
result.append(_T("SSL/TLS handshake completed successfully.\r\n"));
return true;
}
else
{
result.append(_T("ERROR: Handshake failed.\r\n"));
return false;
}
}
else
{
return true;
}
}
else
{
result.append(Formatter::Format("ERROR: It was not possible to connect. Error: {0}.\r\n", connection_result->GetErrorMessage()));
}
}
endpoint_iterator++;
}
// We were unable to connect.
result.append(_T("ERROR: Failed to connect to all servers.\r\n"));
return false;
}
