/* This little program demonstrates the parsing of IPAddress strings */
int main(int argc, char ** argv)
{
CompleteSetupSystem css;
PrintExampleDescription();
while(1)
{
printf("Please enter a string representing an IPv4 or IPv6 numeric host-address: ");
fflush(stdout);
char buf[1024];
(void) fgets(buf, sizeof(buf), stdin);
String s = buf;
s = s.Trim(); // get rid of newline ugliness
IPAddress ip;
if (ip.SetFromString(s) == B_NO_ERROR)
{
printf("I parsed the string [%s] as IPAddress %s\n", s(), ip.ToString()());
printf(" ip.IsValid() returned %i\n", ip.IsValid());
printf(" ip.IsIPv4() returned %i\n", ip.IsIPv4());
printf(" ip.IsMulticast() returned %i\n", ip.IsMulticast());
printf(" ip.IsStandardLoopbackAddress() returned %i\n", ip.IsStandardLoopbackDeviceAddress());
printf("\n");
}
else printf("Error, couldn't parse [%s] as an IPAddress!\n", s());
}
return 0;
}
/** @details The broadcast address can only be calculated on a IPv4 network. While it is
* technically possible to calculate an IPv6 broadcast address, the IPv6 protocol has dropped
* support for broadcasting. Since broadcasting is not supported in IPv6, this method will result
* in an exception given an IPv6 address.
* @param ip An IP address on the network.
* @param netmask The netmask defining the network range.
* @returns The broadcast address.
*/
_CGUL_EXPORT CGUL::Network::IPAddress CGUL::Network::IPAddress::CalculateBroadcast(const IPAddress& ip, const IPAddress& netmask)
{
if (ip.GetType() == IPAddressType::IPV6 || netmask.GetType() == IPAddressType::IPV6)
{
throw NetworkException(NetworkExceptionCode::FAILED_CALCULATE_ADDRESS, NetworkExceptionReason::ADDRESS_INVALID);
}
if (!ip.IsValid() || ip.GetType() != netmask.GetType())
{
throw NetworkException(NetworkExceptionCode::FAILED_CALCULATE_ADDRESS, NetworkExceptionReason::ADDRESS_MISMATCH);
}
return IPAddress(ip.ToUInt32() | (~netmask.ToUInt32()));
}
/** @details A network address defines the "bottom-most" address for a given network.
* @param ip An IP address on the network.
* @param netmask The netmask defining the network range.
* @returns The network address.
*/
_CGUL_EXPORT CGUL::Network::IPAddress CGUL::Network::IPAddress::CalculateNetwork(const IPAddress& ip, const IPAddress& netmask)
{
if (!ip.IsValid() || ip.GetType() != netmask.GetType())
{
throw NetworkException(NetworkExceptionCode::FAILED_CALCULATE_ADDRESS, NetworkExceptionReason::ADDRESS_MISMATCH);
}
if (ip.GetType() == IPAddressType::IPV4)
{
return IPAddress(ip.ToUInt32() & netmask.ToUInt32());
}
else
{
UInt64 network[2];
network[0] = ip.address[0] & netmask.address[0];
network[1] = ip.address[1] & netmask.address[1];
return IPAddress(network);
}
}
/** @brief Connects to a server on a given ip and port.
* @param ip The IP address to connect to.
* @param port The port number.
*/
void Jatta::Network::SocketTCP::Connect(const IPAddress& ip, unsigned short port)
{
// Check that the IP is valid
if (!ip.IsValid())
{
throw NetworkException(NetworkExceptionCode::FAILED_CONNECT, NetworkExceptionReason::ADDRESS_INVALID);
}
// Create a hints variable used to determine the connection configuration.
struct addrinfo hints;
memset(&hints, 0, sizeof(addrinfo));
// Check if the IP is an IPv4 or IPv6.
if (ip.GetType() == IPAddressType::IPV4)
{
// Use IPv4.
hints.ai_family = AF_INET;
}
else
{
// Use IPv6.
hints.ai_family = AF_INET6;
}
// We're setting up a TCP/IP connection, which is a STREAM socket.
hints.ai_socktype = SOCK_STREAM;
// Convert the port into a string.
char portString[6];
# ifdef MSVC
sprintf_s(portString, "%d", port);
# else
sprintf(portString, "%d", port);
# endif
// Get the address info using the hints.
addrinfo* result;
if (getaddrinfo(ip.ToString().GetCString(), portString, &hints, &result) != 0)
{
throw NetworkException(NetworkExceptionCode::FAILED_CONNECT, NetworkExceptionReason::NO_NETWORK_INTERFACE);
}
// Create the socket. Because our hints are so strict, we don't have to worry about looping
// through the linked list. We should be able to trust that the first result is what we want.
sock = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (sock == INVALID_SOCKET)
{
freeaddrinfo(result);
throw NetworkException(NetworkExceptionCode::FAILED_CONNECT, NetworkExceptionReason::FAILED_CREATE_SOCKET);
}
// Make the connection.
if (::connect(sock, result->ai_addr, result->ai_addrlen) == SOCKET_ERROR)
{
freeaddrinfo(result);
Close();
throw NetworkException(NetworkExceptionCode::FAILED_CONNECT, NetworkExceptionReason::FAILED_CONNECT_CALL);
}
// Make a non-blocking socket.
if (!MakeNonBlocking())
{
freeaddrinfo(result);
Close();
throw NetworkException(NetworkExceptionCode::FAILED_CONNECT, NetworkExceptionReason::FAILED_NONBLOCKING);
}
// Turn off the Nagle Algorithm to increase speed.
if (!MakeNoDelay())
{
freeaddrinfo(result);
Close();
throw NetworkException(NetworkExceptionCode::FAILED_CONNECT, NetworkExceptionReason::FAILED_NO_DELAY);
}
// Free up the address info linked list.
freeaddrinfo(result);
}
