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cleaned up networking namespace and linline

master
Pete McNeil 5 years ago
parent
687f552466
commit
89cb9a0db3
3 changed files with 469 additions and 494 deletions
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  1. 419
    69
      networking.cpp
  2. 50
    50
      networking.hpp
  3. 0
    375
      networking.inline.hpp

+ 419
- 69
networking.cpp View File

//============================================================================== //==============================================================================


// See networking.hpp for notes. // See networking.hpp for notes.
// See networking.inline.hpp for inlined methods & functions.


#include "networking.hpp" #include "networking.hpp"


Networking Network; // Finally creating the Network instance.
namespace codedweller {

Networking Network; // Creating _THE_ Network instance.

#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)

int Networking::getLastError() { // In windows you get the last error
return WSAGetLastError(); // from WSAGetLastError();
}

int Networking::setNonBlocking(hSocket socket) { // Set a winsock to non-blocking
unsigned long nonblocking = 1; // Create a flag...
int result = 0;
if(0 != ioctlsocket(socket, FIONBIO, &nonblocking)) { // Set the state of the socket.
result = -1; // If that fails then return -1.
}
return result; // Show 'em my motto!
}

int Networking::closeSocket(hSocket socket) { // Close a socket in winsock
return closesocket(socket); // wraps closesocket().
}

bool Networking::WouldBlock(int ErrorCode) { // ErrorCode matches [WSA]EWOULDBLOCK.
return (WSAEWOULDBLOCK == ErrorCode);
}

bool Networking::InProgress(int ErrorCode) { // ErrorCode matches [WSA]EINPROGRESS.
return( // [WSA]EALREADY also returns true.
WSAEINPROGRESS == ErrorCode || // In fact, on Win* platforms we could
WSAEALREADY == ErrorCode || // get any of these when retesting
WSAEWOULDBLOCK == ErrorCode || // open() for a connection.
WSAEINVAL == ErrorCode
);
}

bool Networking::IsConnected(int ErrorCode) { // ErrorCode matches [WSA]EISCONN.
return(WSAEISCONN == ErrorCode);
}

#else

//// GNU platform

int Networking::getLastError() { // In GNU you get the last error
return errno; // from errno;
}

int Networking::setNonBlocking(hSocket socket) { // Set a socket to non-blocking
int flags, result; // Grab a place to hold the flags.
flags = fcntl(socket, F_GETFL, 0); // Get the current flags.
result = fcntl(socket, F_SETFL, flags | O_NONBLOCK); // Set the NONBLOCK flag & return.
return result; // Return the result.
}

int Networking::closeSocket(hSocket socket) { // Close a socket in GNU
return close(socket); // wraps close().
}

bool Networking::WouldBlock(int ErrorCode) { // ErrorCode matches [WSA]EWOULDBLOCK.
return (EWOULDBLOCK == ErrorCode);
}

bool Networking::InProgress(int ErrorCode) { // ErrorCode matches [WSA]EINPROGRESS.
return( // [WSA]EALREADY also returns true.
EINPROGRESS == ErrorCode ||
EALREADY == ErrorCode
);
}

bool Networking::IsConnected(int ErrorCode) { // ErrorCode matches [WSA]EISCONN.
return(EISCONN == ErrorCode);
}

#endif

// End Platform Specific
////////////////////////////////////////////////////////////////////////////////
// Begin Platform Agnostic

//// class IP4Address //////////////////////////////////////////////////////////

IP4Address::IP4Address():IP(0){} // Blank constructor IP = 0.0.0.0
IP4Address::IP4Address(const unsigned long int newIP):IP(newIP){} // Constructor given unsigned long
IP4Address::IP4Address(const IP4Address& newIP):IP(newIP.IP){} // Constructor given an IP4Address

IP4Address::IP4Address(const char* newIP) { (*this) = newIP; } // Construcing with a cstring.
IP4Address::IP4Address(const std::string& newIP) { (*this) = newIP; } // Constructing with a cppstring.

IP4Address& IP4Address::operator=(const unsigned long int Right) { // Convert from unsigned long int.
IP = Right;
return *this;
}

IP4Address& IP4Address::operator=(const char* Right) { // Convert from c string.
IP = ntohl(inet_addr(Right));
return *this;
}

IP4Address& IP4Address::operator=(const std::string& Right) { // Convert from cpp string.
IP = ntohl(inet_addr(Right.c_str()));
return *this;
}

bool IP4Address::operator<(const IP4Address Right) const { // < Comparison.
return (IP < Right.IP);
}

bool IP4Address::operator>(const IP4Address Right) const { // > Comparison.
return (IP > Right.IP);
}

bool IP4Address::operator==(const IP4Address Right) const { // == Comparison.
return (IP == Right.IP);
}

bool IP4Address::operator!=(const IP4Address Right) const { // != Comparison.
return (IP != Right.IP);
}

bool IP4Address::operator<=(const IP4Address Right) const { // <= Comparison.
return (IP <= Right.IP);
}

bool IP4Address::operator>=(const IP4Address Right) const { // >= Comparison.
return (IP >= Right.IP);
}

//// class SocketAddress ///////////////////////////////////////////////////////

void SocketAddress::clear() {
memset(&Address, 0, sizeof(Address)); // Zero out the address strcuture
Address.sin_family = AF_INET; // Internet Address Family ip4
Address.sin_addr.s_addr = htonl(INADDR_ANY); // Any IP address
Address.sin_port = 0; // Zero means any port.
}

SocketAddress::SocketAddress() { // Constructor sets up w/ wildcards
clear(); // Conveniently, we can use clear() :-)
}

struct sockaddr_in* SocketAddress::getPtr_sockaddr_in() { // Returns a pointer to sockaddr_in.
return &Address; // Simply return it's address.
}

struct sockaddr* SocketAddress::getPtr_sockaddr() { // Returns a pointer to sockaddr.
return (struct sockaddr*) &Address;
}


socklen_t SocketAddress::getAddressSize() {
return sizeof(Address); // Return the size of the structure.
}

void SocketAddress::setAddress(unsigned long ipAddress) { // Set the IP address from an unsigned int
Address.sin_addr.s_addr = htonl(ipAddress); // Convert to network order and assign.
}

void SocketAddress::setAddress(char* ipString) { // Set the IP address from a cstring
Address.sin_addr.s_addr = inet_addr(ipString); // Convert to number and assign.
}

unsigned long SocketAddress::getAddress() { // Get the IP address as an unsigned int
return ntohl(Address.sin_addr.s_addr); // Convert to host order and return.
}

void SocketAddress::setPort(unsigned short port) { // Set the port address from an int
Address.sin_port = htons(port); // Convert to network order and set.
}

void SocketAddress::setPort(char* port) { // Set the port address from a cstring
setPort(atoi(port)); // Convert to int and set.
}

unsigned short SocketAddress::getPort() { // Get the port address as an unsigned int
return ntohs(Address.sin_port); // Convert to host order and return.
}

const char* SocketAddress::getPort(char* str) { // Get the port address into a cstring.
if(NULL == str) { // If the caller did not provide a
str = PortStringBuffer; // buffer to use then we will use ours.
}
sprintf(str,"%d",getPort()); // Get the port and convert to cstring.
return str; // Return the string we got.
}

//// class Socket //////////////////////////////////////////////////////////////

Socket::Socket() : // When starting up we are
Handle(INVALID_SOCKET), OpenSucceeded(false) { // not yet valid.
}

Socket::~Socket() { // When shutting down, be sure
if(INVALID_SOCKET != Handle) { // any open socket is closed without
Network.closeSocket(Handle); // throwing any exceptions.
}
}

void Socket::close() { // When we close,
if(INVALID_SOCKET != Handle) { // If the handle is open then
if(Network.closeSocket(Handle)) { // close the handle and check for error.
LastError = Network.getLastError(); // If there was an error record it.
if(!Network.WouldBlock(LastError)) { // If the error was not WOULDBLOCK
throw Networking::ControlError( // then throw a ControlError exception.
Network.DescriptiveError(
"Socket::close()", LastError));
}
} else { // If there was no error then
LastError = 0; // reset the LastError value.
}
Handle = INVALID_SOCKET; // and reset the handle to INVALID.
NonBlocking = false; // The default is Blocking.
OpenSucceeded = false; // After close, forget we opened.
}
}

hSocket Socket::getHandle() { // Returns the current Socket handle.
return Handle;
}

bool Socket::isNonBlocking() { // Returns true if socket is NonBlocking
return NonBlocking;
}

void Socket::makeNonBlocking() { // Sets the socket to NonBlocking mode.
if(0 > Network.setNonBlocking(Handle)) { // Feed the call through Network.
LastError = Network.getLastError(); // If it didn't work, go get the error.
NonBlocking = false; // We are NOT NonBlocking.
throw Networking::ControlError( // Throw a control error.
Network.DescriptiveError(
"Socket::makeNonBlocking()", LastError));
} else {
NonBlocking = true; // If we didn't throw, we're ON.
}
}

bool Socket::isReuseAddress() { return ReuseAddress; } // True if socket is set SO_REUSEADDR.
bool Socket::isReuseAddress(bool set) { return (ReuseAddress = set); } // Changes SO_REUSEADDR setting.

bool Socket::isOpen() { // True if the socket is open.
return(
INVALID_SOCKET != Handle && // A valid handle and
true == OpenSucceeded // a successful open operation
); // means we're open.
}

int Socket::getLastError() { // Returns the last error for this socket.
return LastError;
}

//// class TCPClient ///////////////////////////////////////////////////////////

TCPClient::TCPClient(TCPListener& L, hSocket H, SocketAddress& A) : // How to create a TCPClient.
MyListener(L) { // Capture our listener.
Handle = H; // Capture the new socket handle.
RemoteAddress = A; // Capture the client address.
ReadPointer = ReadBuffer; // Set the read position to zero.
DataLength = 0; // There is no data yet.
OpenSucceeded = true; // We're getting an open socket.
}

TCPClient::~TCPClient() { // When destroying a TCPClient
try{ if(isOpen()) close(); } catch(...) {} // silently close any open connections.
}

void TCPClient::open() { // We provide open() as unsupported.
throw Networking::NotSupportedError( // Throw an exception if this is called.
Network.DescriptiveError(
"TCPClient::open()", LastError));
}

bool TCPClient::ReadBufferIsEmpty() { // True if the ReadBuffer is empty.
return (0 >= DataLength); // We can check that with DataLength.
}

void TCPClient::fillReadBuffer() { // Fills the buffer from the socket.
LastError = 0; // Clear the LastError value.
ReadPointer = ReadBuffer; // Reset the ReadPointer.
DataLength = recv(Handle, ReadBuffer, sizeof(ReadBuffer), MSG_NOSIGNAL); // Try to read some data.

if(0 >= DataLength) { // If there was an error then
LastError = Network.getLastError(); // Grab the last error code.
DataLength = 0; // Correct the DataLength.
if(Network.WouldBlock(LastError)) { // If the error was WouldBlock then
return; // simply return - it's ok.
} else { // If it was a different error
throw Networking::SocketReadError( // then throw a ReadError.
Network.DescriptiveError(
"TCPClient::fillReadBuffer()", LastError));
}
} // If we succeeded then our ReadBuffer
} // assembly is in good shape.

bool TCPClient::isNonBlocking() { // Provided for MessagePort.
return Socket::isNonBlocking();
}

unsigned long TCPClient::getRemoteIP() { // Get remote IP as long.
return RemoteAddress.getAddress();
}

const char* TCPClient::getRemoteIP(char* str) { // Get IP as string.
return RemoteAddress.getAddress(str);
}

unsigned short TCPClient::getRemotePort() { // Get remote Port as unsigned short.
return RemoteAddress.getPort();
}

const char* TCPClient::getRemotePort(char* str) { // Get Port as string.
return RemoteAddress.getPort(str);
}

//// class TCPHost /////////////////////////////////////////////////////////////

TCPHost::~TCPHost() { // When destroying a TCPHost
try{ if(isOpen()) close(); } catch(...) {} // silently close any open connection.
}

bool TCPHost::ReadBufferIsEmpty() { // True if the ReadBuffer is empty.
return (0 >= DataLength); // We can check that with DataLength.
}

void TCPHost::fillReadBuffer() { // Fills the buffer from the socket.
LastError = 0; // Clear the LastError value.
ReadPointer = ReadBuffer; // Reset the ReadPointer.
DataLength = recv(Handle, ReadBuffer, sizeof(ReadBuffer), MSG_NOSIGNAL); // Try to read some data.

if(0 >= DataLength) { // If there was an error then
LastError = Network.getLastError(); // Grab the last error code.
DataLength = 0; // Correct the DataLength.
if(Network.WouldBlock(LastError)) { // If the error was WouldBlock then
return; // simply return - it's ok.
} else { // If it was a different error
throw Networking::SocketReadError( // then throw a ReadError.
Network.DescriptiveError(
"TCPHost::fillReadBuffer()", LastError));
}
} // If we succeeded then our ReadBuffer
} // assembly is in good shape.

bool TCPHost::isNonBlocking() { // Provided for MessagePort.
return Socket::isNonBlocking();
}

//// class TCPListener /////////////////////////////////////////////////////////

TCPListener::~TCPListener() { // When destroying a TCPListener
try{ close(); } catch(...) {} // silently close if not already done.
}


//// Platform Specific Stuff /////////////////////////////////////////////////// //// Platform Specific Stuff ///////////////////////////////////////////////////


Msg.append(s); // then append it. Msg.append(s); // then append it.
} }
else { // If we don't know what Errno means else { // If we don't know what Errno means
ostringstream ErrNoMsg; // then say so and pass on Errno as
std::ostringstream ErrNoMsg; // then say so and pass on Errno as
ErrNoMsg << " UNKNOWN ErrorNumber = " << Errno; // well so someone can figure it out. ErrNoMsg << " UNKNOWN ErrorNumber = " << Errno; // well so someone can figure it out.
Msg.append(ErrNoMsg.str()); Msg.append(ErrNoMsg.str());
} }


// Error description handling for humans. // Error description handling for humans.


string Networking::DescriptiveError(string Msg, int Errno) { // Form a descriptive error w/ errno.
std::string Networking::DescriptiveError(std::string Msg, int Errno) { // Form a descriptive error w/ errno.
Msg.append(" "); Msg.append(strerror(Errno)); Msg.append(" "); Msg.append(strerror(Errno));
return Msg; return Msg;
}; };
return IP; // Return it. return IP; // Return it.
} }


IP4Address::operator string() const { // Assign to a string.
IP4Address::operator std::string() const { // Assign to a string.
char stringbfr[IPStringBufferSize]; // Grab a temporary buffer. char stringbfr[IPStringBufferSize]; // Grab a temporary buffer.
memset(stringbfr, 0, sizeof(stringbfr)); // Null out it's space. memset(stringbfr, 0, sizeof(stringbfr)); // Null out it's space.
int a0, a1, a2, a3; // Grab some integers. int a0, a1, a2, a3; // Grab some integers.
splitIP(IP, a0, a1, a2, a3); // Split the IP in the IP4Address. splitIP(IP, a0, a1, a2, a3); // Split the IP in the IP4Address.
sprintf(stringbfr, "%d.%d.%d.%d", a0, a1, a2, a3); // Format the octets. sprintf(stringbfr, "%d.%d.%d.%d", a0, a1, a2, a3); // Format the octets.
return string(stringbfr); // Return a string.
return std::string(stringbfr); // Return a string.
} }


//// SocketAddress methods ///////////////////////////////////////////////////// //// SocketAddress methods /////////////////////////////////////////////////////


if(!OpenStage2Complete) { // Do this stage only once. if(!OpenStage2Complete) { // Do this stage only once.
int result = // Bind our socket to the LocalAddress. int result = // Bind our socket to the LocalAddress.
::bind(
bind(
Handle, Handle,
LocalAddress.getPtr_sockaddr(), LocalAddress.getPtr_sockaddr(),
LocalAddress.getAddressSize()); LocalAddress.getAddressSize());
return NULL; // non blocking mode so we return return NULL; // non blocking mode so we return
} // NULL when we see them. } // NULL when we see them.
} }
// Set SO_NOSIGPIPE if needed
if( // On some systems we may have to
0 != SO_NOSIGPIPE && // use SO_NOSIPIPE but if they offer
0 == MSG_NOSIGNAL // MSG_NOSIGNAL we prefer that instead.
) {
int TurnedOn = 1; // Prepare to turn this option on.
int result = // Set SO_NOSIGPIPE.
setsockopt(
NewHandle,
SOL_SOCKET,
SO_NOSIGPIPE,
(char*) &TurnedOn,
sizeof(TurnedOn));
if(0 > result) { // If there was an error then
LastError = Network.getLastError(); // Capture the error information
Network.closeSocket(NewHandle); // close the handle (avoid leaks)
throw Networking::SocketSetSockOptError( // and throw a descriptive exception.
Network.DescriptiveError(
"TCPListener::acceptClient().setsockopt(SO_NOSIGPIPE)", LastError));
}
}
// Set SO_NOSIGPIPE if needed
if( // On some systems we may have to
0 != SO_NOSIGPIPE && // use SO_NOSIPIPE but if they offer
0 == MSG_NOSIGNAL // MSG_NOSIGNAL we prefer that instead.
) {
int TurnedOn = 1; // Prepare to turn this option on.
int result = // Set SO_NOSIGPIPE.
setsockopt(
NewHandle,
SOL_SOCKET,
SO_NOSIGPIPE,
(char*) &TurnedOn,
sizeof(TurnedOn));
if(0 > result) { // If there was an error then
LastError = Network.getLastError(); // Capture the error information
Network.closeSocket(NewHandle); // close the handle (avoid leaks)
throw Networking::SocketSetSockOptError( // and throw a descriptive exception.
Network.DescriptiveError(
"TCPListener::acceptClient().setsockopt(SO_NOSIGPIPE)", LastError));
}
}


// If things have gone well we can do what we came for. // If things have gone well we can do what we came for.


if(0 > size) // Watch out for bad sizes. if(0 > size) // Watch out for bad sizes.
throw Networking::SocketWriteError("TCPClient::transmit() 0 > size!"); throw Networking::SocketWriteError("TCPClient::transmit() 0 > size!");


LastError = 0; // No errors yet.
int ByteCount = 0; // No bytes sent yet this pass.
LastError = 0; // No errors yet.
int ByteCount = 0; // No bytes sent yet this pass.
ByteCount = send(Handle, bfr, size, MSG_NOSIGNAL); // Try to send and capture the count. ByteCount = send(Handle, bfr, size, MSG_NOSIGNAL); // Try to send and capture the count.
LastError = Network.getLastError(); // Grab any error code.
bool AnErrorOccurred = (0 > ByteCount); // How to know if an error occurred.
const int NoBytesSent = 0; // This is our "Would Block" result.
LastError = Network.getLastError(); // Grab any error code.
bool AnErrorOccurred = (0 > ByteCount); // How to know if an error occurred.
const int NoBytesSent = 0; // This is our "Would Block" result.
if(AnErrorOccurred) { // If there was an error check it out. if(AnErrorOccurred) { // If there was an error check it out.
if(Network.WouldBlock(LastError)) { // If the error was "Would Block" then if(Network.WouldBlock(LastError)) { // If the error was "Would Block" then
return NoBytesSent; // return no bytes sent (try again). return NoBytesSent; // return no bytes sent (try again).
"TCPClient::transmit().send()", LastError)); "TCPClient::transmit().send()", LastError));
} }
} }
return ByteCount; // Usually: return the sent byte count. return ByteCount; // Usually: return the sent byte count.
} }


LastError = 0; // Clear our LastError value. LastError = 0; // Clear our LastError value.
bool SuccessFlag = true; // Begin optimistically. bool SuccessFlag = true; // Begin optimistically.


// Set Socket Options
// Set Socket Options
if(!OpenStage1Complete) { // If we haven't done this yet: if(!OpenStage1Complete) { // If we haven't done this yet:
// Set SO_REUSEADDR if turned on
// Set SO_REUSEADDR if turned on
int ReuseAddress_Flag = (ReuseAddress? 1:0); // Setup an appropriate integer flag. int ReuseAddress_Flag = (ReuseAddress? 1:0); // Setup an appropriate integer flag.
int result = // Set SO_REUSEADDR before bind(). int result = // Set SO_REUSEADDR before bind().
setsockopt( setsockopt(
Network.DescriptiveError( Network.DescriptiveError(
"TCPHost::open().setsockopt(SO_REUSEADDR)", LastError)); "TCPHost::open().setsockopt(SO_REUSEADDR)", LastError));
} }
// Set SO_NOSIGPIPE if needed
if( // On some systems we may have to
0 != SO_NOSIGPIPE && // use SO_NOSIPIPE but if they offer
0 == MSG_NOSIGNAL // MSG_NOSIGNAL we prefer that instead.
) {
int TurnedOn = 1; // Prepare to turn this option on.
int result = // Set SO_NOSIGPIPE.
setsockopt(
Handle,
SOL_SOCKET,
SO_NOSIGPIPE,
(char*) &TurnedOn,
sizeof(TurnedOn));
if(0 > result) { // If there was an error then
SuccessFlag = false; // we did not succeed.
LastError = Network.getLastError(); // Capture the error information and
throw Networking::SocketSetSockOptError( // throw.
Network.DescriptiveError(
"TCPHost::open().setsockopt(SO_NOSIGPIPE)", LastError));
}
}
// Set SO_NOSIGPIPE if needed
if( // On some systems we may have to
0 != SO_NOSIGPIPE && // use SO_NOSIPIPE but if they offer
0 == MSG_NOSIGNAL // MSG_NOSIGNAL we prefer that instead.
) {
int TurnedOn = 1; // Prepare to turn this option on.
int result = // Set SO_NOSIGPIPE.
setsockopt(
Handle,
SOL_SOCKET,
SO_NOSIGPIPE,
(char*) &TurnedOn,
sizeof(TurnedOn));
if(0 > result) { // If there was an error then
SuccessFlag = false; // we did not succeed.
LastError = Network.getLastError(); // Capture the error information and
throw Networking::SocketSetSockOptError( // throw.
Network.DescriptiveError(
"TCPHost::open().setsockopt(SO_NOSIGPIPE)", LastError));
}
}
OpenStage1Complete = true; // Skip this section from now on. OpenStage1Complete = true; // Skip this section from now on.
} // Done with stage 1. } // Done with stage 1.




// End Platform Agnostic Stuff // End Platform Agnostic Stuff
//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////

} // End namespace codedweller

+ 50
- 50
networking.hpp View File

// The networking module abstracts network communications and provides a set // The networking module abstracts network communications and provides a set
// of objects for handling most tasks. // of objects for handling most tasks.


// 20080313 _M Refactored to throw proper runtime_error exceptions.

// Include only once...
#ifndef M_Networking
#define M_Networking
#pragma once


#include <stdexcept> #include <stdexcept>
#include <iostream> #include <iostream>
#include <sstream> #include <sstream>
#include <cstring> #include <cstring>


using namespace std;

#include <cstdlib> #include <cstdlib>
#include <cstdio> #include <cstdio>
#include <cerrno> #include <cerrno>
//// Windows headers... //// Windows headers...


#include <winsock2.h> #include <winsock2.h>

namespace codedweller {

typedef int socklen_t; // Posix uses socklen_t so we mimic it. typedef int socklen_t; // Posix uses socklen_t so we mimic it.
typedef SOCKET hSocket; // Winx handles Socket is opaque. typedef SOCKET hSocket; // Winx handles Socket is opaque.

} // End namespace codedweller

#else #else


//// GNU Headers... //// GNU Headers...
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>


namespace codedweller {

typedef int hSocket; // *nix uses int to handle a Socket. typedef int hSocket; // *nix uses int to handle a Socket.
const hSocket INVALID_SOCKET = -1; // -1 is the invalid Socket. const hSocket INVALID_SOCKET = -1; // -1 is the invalid Socket.


} // End namespace codedweller

#endif

namespace codedweller {

//// Handling SIGPIPE //////////////////////////////////////////////////////////

#ifndef MSG_NOSIGNAL
const int MSG_NOSIGNAL = 0; // Fake this if it isn't defined.
#endif

#ifndef SO_NOSIGPIPE
const int SO_NOSIGPIPE = 0; // Fake this if it isn't defined.
#endif #endif


//// Handling SIGPIPE //////////////////////////////////////////////////////////
#ifndef MSG_NOSIGNAL
const int MSG_NOSIGNAL = 0; // Fake this if it isn't defined.
#endif
#ifndef SO_NOSIGPIPE
const int SO_NOSIGPIPE = 0; // Fake this if it isn't defined.
#endif
//// Tuning and Constants ////////////////////////////////////////////////////// //// Tuning and Constants //////////////////////////////////////////////////////


const unsigned long LOCALHOST = 0x7F000001; // 127.0.0.1 as an integer. const unsigned long LOCALHOST = 0x7F000001; // 127.0.0.1 as an integer.
IP4Address(const IP4Address&); // Constructor given an IP4Address IP4Address(const IP4Address&); // Constructor given an IP4Address


IP4Address(const char* newIP); // Construcing with a cstring. IP4Address(const char* newIP); // Construcing with a cstring.
IP4Address(const string& newIP); // Constructing with a cppstring.
IP4Address(const std::string& newIP); // Constructing with a cppstring.


IP4Address& operator=(const unsigned long int Right); // Convert from unsigned long int. IP4Address& operator=(const unsigned long int Right); // Convert from unsigned long int.
IP4Address& operator=(const char* Right); // Convert from c string. IP4Address& operator=(const char* Right); // Convert from c string.
IP4Address& operator=(const string& Right); // Convert from cpp string.
IP4Address& operator=(const std::string& Right); // Convert from cpp string.


operator unsigned long int() const; operator unsigned long int() const;
operator string() const;
operator std::string() const;


bool operator<(const IP4Address Right) const; // < Comparison. bool operator<(const IP4Address Right) const; // < Comparison.
bool operator>(const IP4Address Right) const; // > Comparison. bool operator>(const IP4Address Right) const; // > Comparison.


public: public:


class NotSupportedError : public runtime_error { // Thrown when something can't be done.
public: NotSupportedError(const string& w):runtime_error(w) {}
class NotSupportedError : public std::runtime_error { // Thrown when something can't be done.
public: NotSupportedError(const std::string& w):runtime_error(w) {}
}; };
class InitializationError : public runtime_error { // Thrown if initialization fails.
public: InitializationError(const string& w):runtime_error(w) {}
class InitializationError : public std::runtime_error { // Thrown if initialization fails.
public: InitializationError(const std::string& w):runtime_error(w) {}
}; };
class ControlError : public runtime_error { // Thrown if control functions fail.
public: ControlError(const string& w):runtime_error(w) {}
class ControlError : public std::runtime_error { // Thrown if control functions fail.
public: ControlError(const std::string& w):runtime_error(w) {}
}; };
class SocketCreationError : public runtime_error { // Thrown if a call to socket() fails.
public: SocketCreationError(const string& w):runtime_error(w) {}
class SocketCreationError : public std::runtime_error { // Thrown if a call to socket() fails.
public: SocketCreationError(const std::string& w):runtime_error(w) {}
}; };
class SocketSetSockOptError : public runtime_error {
public: SocketSetSockOptError(const string& w):runtime_error(w) {} // Thrown if a call to setsockopt() fails.
class SocketSetSockOptError : public std::runtime_error { // Thrown if a call to setsockopt() fails.
public: SocketSetSockOptError(const std::string& w):runtime_error(w) {}
}; };
class SocketBindError : public runtime_error { // Thrown if a call to bind() fails.
public: SocketBindError(const string& w):runtime_error(w) {}
class SocketBindError : public std::runtime_error { // Thrown if a call to bind() fails.
public: SocketBindError(const std::string& w):runtime_error(w) {}
}; };
class SocketListenError : public runtime_error { // Thrown if a call to listen() fails.
public: SocketListenError(const string& w):runtime_error(w) {}
class SocketListenError : public std::runtime_error { // Thrown if a call to listen() fails.
public: SocketListenError(const std::string& w):runtime_error(w) {}
}; };
class SocketConnectError : public runtime_error { // Thrown if a call to connect() fails.
public: SocketConnectError(const string& w):runtime_error(w) {}
class SocketConnectError : public std::runtime_error { // Thrown if a call to connect() fails.
public: SocketConnectError(const std::string& w):runtime_error(w) {}
}; };
class SocketAcceptError : public runtime_error { // Thrown if a call to accept() fails.
public: SocketAcceptError(const string& w):runtime_error(w) {}
class SocketAcceptError : public std::runtime_error { // Thrown if a call to accept() fails.
public: SocketAcceptError(const std::string& w):runtime_error(w) {}
}; };
class SocketReadError : public runtime_error { // Thrown if a socket read call fails.
public: SocketReadError(const string& w):runtime_error(w) {}
class SocketReadError : public std::runtime_error { // Thrown if a socket read call fails.
public: SocketReadError(const std::string& w):runtime_error(w) {}
}; };
class SocketWriteError : public runtime_error { // Thrown if a socket write call fails.
public: SocketWriteError(const string& w):runtime_error(w) {}
class SocketWriteError : public std::runtime_error { // Thrown if a socket write call fails.
public: SocketWriteError(const std::string& w):runtime_error(w) {}
}; };


static string DescriptiveError(string Msg, int Errno); // Form a descriptive error w/ errno.
static std::string DescriptiveError(std::string Msg, int Errno); // Form a descriptive error w/ errno.


Networking(); Networking();
~Networking(); ~Networking();
// End of UDPBroadcaster class // End of UDPBroadcaster class
//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////


//// Include Inline methods and functions...

#include "networking.inline.hpp"

#endif
// End include Networking.hpp only once...
} // End namespace codedweller

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networking.inline.hpp View File

// networking.inline.hpp
// Copyright (C) 2006-2009 MicroNeil Research Corporation.
//
// This program is part of the MicroNeil Research Open Library Project. For
// more information go to http://www.microneil.com/OpenLibrary/index.html
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
// Place, Suite 330, Boston, MA 02111-1307 USA
//==============================================================================

// Inlined methods for Networking module. See networking.hpp for notes.

////////////////////////////////////////////////////////////////////////////////
// Platform Specific

//// Windows platform

#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)

inline int Networking::getLastError() { // In windows you get the last error
return WSAGetLastError(); // from WSAGetLastError();
}

inline int Networking::setNonBlocking(hSocket socket) { // Set a winsock to non-blocking
unsigned long nonblocking = 1; // Create a flag...
int result = 0;
if(0 != ioctlsocket(socket, FIONBIO, &nonblocking)) { // Set the state of the socket.
result = -1; // If that fails then return -1.
}
return result; // Show 'em my motto!
}

inline int Networking::closeSocket(hSocket socket) { // Close a socket in winsock
return closesocket(socket); // wraps closesocket().
}

inline bool Networking::WouldBlock(int ErrorCode) { // ErrorCode matches [WSA]EWOULDBLOCK.
return (WSAEWOULDBLOCK == ErrorCode);
}

inline bool Networking::InProgress(int ErrorCode) { // ErrorCode matches [WSA]EINPROGRESS.
return( // [WSA]EALREADY also returns true.
WSAEINPROGRESS == ErrorCode || // In fact, on Win* platforms we could
WSAEALREADY == ErrorCode || // get any of these when retesting
WSAEWOULDBLOCK == ErrorCode || // open() for a connection.
WSAEINVAL == ErrorCode
);
}

inline bool Networking::IsConnected(int ErrorCode) { // ErrorCode matches [WSA]EISCONN.
return(WSAEISCONN == ErrorCode);
}

#else

//// GNU platform

inline int Networking::getLastError() { // In GNU you get the last error
return errno; // from errno;
}

inline int Networking::setNonBlocking(hSocket socket) { // Set a socket to non-blocking
int flags, result; // Grab a place to hold the flags.
flags = fcntl(socket, F_GETFL, 0); // Get the current flags.
result = fcntl(socket, F_SETFL, flags | O_NONBLOCK); // Set the NONBLOCK flag & return.
return result; // Return the result.
}

inline int Networking::closeSocket(hSocket socket) { // Close a socket in GNU
return close(socket); // wraps close().
}

inline bool Networking::WouldBlock(int ErrorCode) { // ErrorCode matches [WSA]EWOULDBLOCK.
return (EWOULDBLOCK == ErrorCode);
}

inline bool Networking::InProgress(int ErrorCode) { // ErrorCode matches [WSA]EINPROGRESS.
return( // [WSA]EALREADY also returns true.
EINPROGRESS == ErrorCode ||
EALREADY == ErrorCode
);
}

inline bool Networking::IsConnected(int ErrorCode) { // ErrorCode matches [WSA]EISCONN.
return(EISCONN == ErrorCode);
}

#endif

// End Platform Specific
////////////////////////////////////////////////////////////////////////////////
// Begin Platform Agnostic

//// class IP4Address //////////////////////////////////////////////////////////

inline IP4Address::IP4Address():IP(0){} // Blank constructor IP = 0.0.0.0
inline IP4Address::IP4Address(const unsigned long int newIP):IP(newIP){} // Constructor given unsigned long
inline IP4Address::IP4Address(const IP4Address& newIP):IP(newIP.IP){} // Constructor given an IP4Address

inline IP4Address::IP4Address(const char* newIP) { (*this) = newIP; } // Construcing with a cstring.
inline IP4Address::IP4Address(const string& newIP) { (*this) = newIP; } // Constructing with a cppstring.

inline IP4Address&
IP4Address::operator=(const unsigned long int Right) { // Convert from unsigned long int.
IP = Right;
return *this;
}

inline IP4Address& IP4Address::operator=(const char* Right) { // Convert from c string.
IP = ntohl(inet_addr(Right));
return *this;
}

inline IP4Address& IP4Address::operator=(const string& Right) { // Convert from cpp string.
IP = ntohl(inet_addr(Right.c_str()));
return *this;
}

inline bool IP4Address::operator<(const IP4Address Right) const { // < Comparison.
return (IP < Right.IP);
}

inline bool IP4Address::operator>(const IP4Address Right) const { // > Comparison.
return (IP > Right.IP);
}

inline bool IP4Address::operator==(const IP4Address Right) const { // == Comparison.
return (IP == Right.IP);
}

inline bool IP4Address::operator!=(const IP4Address Right) const { // != Comparison.
return (IP != Right.IP);
}

inline bool IP4Address::operator<=(const IP4Address Right) const { // <= Comparison.
return (IP <= Right.IP);
}

inline bool IP4Address::operator>=(const IP4Address Right) const { // >= Comparison.
return (IP >= Right.IP);
}

//// class SocketAddress ///////////////////////////////////////////////////////

inline void SocketAddress::clear() {
memset(&Address, 0, sizeof(Address)); // Zero out the address strcuture
Address.sin_family = AF_INET; // Internet Address Family ip4
Address.sin_addr.s_addr = htonl(INADDR_ANY); // Any IP address
Address.sin_port = 0; // Zero means any port.
}

inline SocketAddress::SocketAddress() { // Constructor sets up w/ wildcards
clear(); // Conveniently, we can use clear() :-)
}

inline struct sockaddr_in* SocketAddress::getPtr_sockaddr_in() { // Returns a pointer to sockaddr_in.
return &Address; // Simply return it's address.
}

inline struct sockaddr* SocketAddress::getPtr_sockaddr() { // Returns a pointer to sockaddr.
return (struct sockaddr*) &Address;
}


inline socklen_t SocketAddress::getAddressSize() {
return sizeof(Address); // Return the size of the structure.
}

inline void SocketAddress::setAddress(unsigned long ipAddress) { // Set the IP address from an unsigned int
Address.sin_addr.s_addr = htonl(ipAddress); // Convert to network order and assign.
}

inline void SocketAddress::setAddress(char* ipString) { // Set the IP address from a cstring
Address.sin_addr.s_addr = inet_addr(ipString); // Convert to number and assign.
}

inline unsigned long SocketAddress::getAddress() { // Get the IP address as an unsigned int
return ntohl(Address.sin_addr.s_addr); // Convert to host order and return.
}

inline void SocketAddress::setPort(unsigned short port) { // Set the port address from an int
Address.sin_port = htons(port); // Convert to network order and set.
}

inline void SocketAddress::setPort(char* port) { // Set the port address from a cstring
setPort(atoi(port)); // Convert to int and set.
}

inline unsigned short SocketAddress::getPort() { // Get the port address as an unsigned int
return ntohs(Address.sin_port); // Convert to host order and return.
}

inline const char* SocketAddress::getPort(char* str) { // Get the port address into a cstring.
if(NULL == str) { // If the caller did not provide a
str = PortStringBuffer; // buffer to use then we will use ours.
}
sprintf(str,"%d",getPort()); // Get the port and convert to cstring.
return str; // Return the string we got.
}

//// class Socket //////////////////////////////////////////////////////////////

inline Socket::Socket() : // When starting up we are
Handle(INVALID_SOCKET), OpenSucceeded(false) { // not yet valid.
}

inline Socket::~Socket() { // When shutting down, be sure
if(INVALID_SOCKET != Handle) { // any open socket is closed without
Network.closeSocket(Handle); // throwing any exceptions.
}
}

inline void Socket::close() { // When we close,
if(INVALID_SOCKET != Handle) { // If the handle is open then
if(Network.closeSocket(Handle)) { // close the handle and check for error.
LastError = Network.getLastError(); // If there was an error record it.
if(!Network.WouldBlock(LastError)) { // If the error was not WOULDBLOCK
throw Networking::ControlError( // then throw a ControlError exception.
Network.DescriptiveError(
"Socket::close()", LastError));
}
} else { // If there was no error then
LastError = 0; // reset the LastError value.
}
Handle = INVALID_SOCKET; // and reset the handle to INVALID.
NonBlocking = false; // The default is Blocking.
OpenSucceeded = false; // After close, forget we opened.
}
}

inline hSocket Socket::getHandle() { // Returns the current Socket handle.
return Handle;
}

inline bool Socket::isNonBlocking() { // Returns true if socket is NonBlocking
return NonBlocking;
}

inline void Socket::makeNonBlocking() { // Sets the socket to NonBlocking mode.
if(0 > Network.setNonBlocking(Handle)) { // Feed the call through Network.
LastError = Network.getLastError(); // If it didn't work, go get the error.
NonBlocking = false; // We are NOT NonBlocking.
throw Networking::ControlError( // Throw a control error.
Network.DescriptiveError(
"Socket::makeNonBlocking()", LastError));
} else {
NonBlocking = true; // If we didn't throw, we're ON.
}
}

inline bool Socket::isReuseAddress() { return ReuseAddress; } // True if socket is set SO_REUSEADDR.
inline bool Socket::isReuseAddress(bool set) { return (ReuseAddress = set); } // Changes SO_REUSEADDR setting.

inline bool Socket::isOpen() { // True if the socket is open.
return(
INVALID_SOCKET != Handle && // A valid handle and
true == OpenSucceeded // a successful open operation
); // means we're open.
}

inline int Socket::getLastError() { // Returns the last error for this socket.
return LastError;
}

//// class TCPClient ///////////////////////////////////////////////////////////

inline TCPClient::TCPClient(TCPListener& L, hSocket H, SocketAddress& A) : // How to create a TCPClient.
MyListener(L) { // Capture our listener.
Handle = H; // Capture the new socket handle.
RemoteAddress = A; // Capture the client address.
ReadPointer = ReadBuffer; // Set the read position to zero.
DataLength = 0; // There is no data yet.
OpenSucceeded = true; // We're getting an open socket.
}

inline TCPClient::~TCPClient() { // When destroying a TCPClient
try{ if(isOpen()) close(); } catch(...) {} // silently close any open connections.
}

inline void TCPClient::open() { // We provide open() as unsupported.
throw Networking::NotSupportedError( // Throw an exception if this is called.
Network.DescriptiveError(
"TCPClient::open()", LastError));
}

inline bool TCPClient::ReadBufferIsEmpty() { // True if the ReadBuffer is empty.
return (0 >= DataLength); // We can check that with DataLength.
}

inline void TCPClient::fillReadBuffer() { // Fills the buffer from the socket.
LastError = 0; // Clear the LastError value.
ReadPointer = ReadBuffer; // Reset the ReadPointer.
DataLength = recv(Handle, ReadBuffer, sizeof(ReadBuffer), MSG_NOSIGNAL); // Try to read some data.

if(0 >= DataLength) { // If there was an error then
LastError = Network.getLastError(); // Grab the last error code.
DataLength = 0; // Correct the DataLength.
if(Network.WouldBlock(LastError)) { // If the error was WouldBlock then
return; // simply return - it's ok.
} else { // If it was a different error
throw Networking::SocketReadError( // then throw a ReadError.
Network.DescriptiveError(
"TCPClient::fillReadBuffer()", LastError));
}
} // If we succeeded then our ReadBuffer
} // assembly is in good shape.

inline bool TCPClient::isNonBlocking() { // Provided for MessagePort.
return Socket::isNonBlocking();
}

inline unsigned long TCPClient::getRemoteIP() { // Get remote IP as long.
return RemoteAddress.getAddress();
}

inline const char* TCPClient::getRemoteIP(char* str) { // Get IP as string.
return RemoteAddress.getAddress(str);
}

inline unsigned short TCPClient::getRemotePort() { // Get remote Port as unsigned short.
return RemoteAddress.getPort();
}

inline const char* TCPClient::getRemotePort(char* str) { // Get Port as string.
return RemoteAddress.getPort(str);
}

//// class TCPHost /////////////////////////////////////////////////////////////

inline TCPHost::~TCPHost() { // When destroying a TCPHost
try{ if(isOpen()) close(); } catch(...) {} // silently close any open connection.
}

inline bool TCPHost::ReadBufferIsEmpty() { // True if the ReadBuffer is empty.
return (0 >= DataLength); // We can check that with DataLength.
}

inline void TCPHost::fillReadBuffer() { // Fills the buffer from the socket.
LastError = 0; // Clear the LastError value.
ReadPointer = ReadBuffer; // Reset the ReadPointer.
DataLength = recv(Handle, ReadBuffer, sizeof(ReadBuffer), MSG_NOSIGNAL); // Try to read some data.

if(0 >= DataLength) { // If there was an error then
LastError = Network.getLastError(); // Grab the last error code.
DataLength = 0; // Correct the DataLength.
if(Network.WouldBlock(LastError)) { // If the error was WouldBlock then
return; // simply return - it's ok.
} else { // If it was a different error
throw Networking::SocketReadError( // then throw a ReadError.
Network.DescriptiveError(
"TCPHost::fillReadBuffer()", LastError));
}
} // If we succeeded then our ReadBuffer
} // assembly is in good shape.

inline bool TCPHost::isNonBlocking() { // Provided for MessagePort.
return Socket::isNonBlocking();
}

//// class TCPListener /////////////////////////////////////////////////////////

inline TCPListener::~TCPListener() { // When destroying a TCPListener
try{ close(); } catch(...) {} // silently close if not already done.
}

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