TcpStream TcpStream::connect(const Ipv4Address& address)
{
Descriptor fd(socket(AF_INET, SOCK_STREAM, 0));
if (fd < 0)
{
throw SystemError("IPv4 socket error");
}
if (::connect(fd, address.address(), address.length()) < 0)
{
throw SystemError("IPv4 connect error");
}
return TcpStream(std::move(fd));
}
Ipv4Listener::Ipv4Listener(uint16_t port) :
_fd(socket(AF_INET, SOCK_STREAM, 0))
{
if(_fd < 0)
{
throw SystemError("IPv4 socket error");
}
Ipv4Address address = Ipv4Address::any(port);
if(bind(_fd, address.address(), address.length()) < 0)
{
throw SystemError("IPv4 bind error");
}
if(listen(_fd, 20) < 0)
{
throw SystemError("IPv4 listen error");
}
}
bool
IpcsClassifierRecord::CheckMatchSrcAddr (Ipv4Address srcAddress) const
{
for (std::vector<struct ipv4Addr>::const_iterator iter = m_srcAddr.begin (); iter != m_srcAddr.end (); ++iter)
{
NS_LOG_INFO ("src addr check match: pkt=" << srcAddress << " cls=" << (*iter).Address << "/" << (*iter).Mask);
if (srcAddress.CombineMask ((*iter).Mask) == (*iter).Address)
{
return true;
}
}
NS_LOG_INFO ("NOT OK!");
return false;
}
void
Ipv4AddressHelper::SetBase (
const Ipv4Address network,
const Ipv4Mask mask,
const Ipv4Address address)
{
NS_LOG_FUNCTION_NOARGS ();
m_network = network.Get ();
m_mask = mask.Get ();
m_base = m_address = address.Get ();
//
// Some quick reasonableness testing.
//
NS_ASSERT_MSG ((m_network & ~m_mask) == 0,
"Ipv4AddressHelper::SetBase(): Inconsistent network and mask");
//
// Figure out how much to shift network numbers to get them aligned, and what
// the maximum allowed address is with respect to the current mask.
//
m_shift = NumAddressBits (m_mask);
m_max = (1 << m_shift) - 2;
NS_ASSERT_MSG (m_shift <= 32,
"Ipv4AddressHelper::SetBase(): Unreasonable address length");
//
// Shift the network down into the normalized position.
//
m_network >>= m_shift;
NS_LOG_LOGIC ("m_network == " << m_network);
NS_LOG_LOGIC ("m_mask == " << m_mask);
NS_LOG_LOGIC ("m_address == " << m_address);
}
TcpListener::TcpListener(Dispatcher& dispatcher, const Ipv4Address& addr, uint16_t port) : dispatcher(&dispatcher) {
std::string message;
listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listener == -1) {
message = "socket failed, " + lastErrorMessage();
} else {
int flags = fcntl(listener, F_GETFL, 0);
if (flags == -1 || fcntl(listener, F_SETFL, flags | O_NONBLOCK) == -1) {
message = "fcntl failed, " + lastErrorMessage();
} else {
int on = 1;
if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on) == -1) {
message = "setsockopt failed, " + lastErrorMessage();
} else {
sockaddr_in address;
address.sin_family = AF_INET;
address.sin_port = htons(port);
address.sin_addr.s_addr = htonl( addr.getValue());
if (bind(listener, reinterpret_cast<sockaddr *>(&address), sizeof address) != 0) {
message = "bind failed, " + lastErrorMessage();
} else if (listen(listener, SOMAXCONN) != 0) {
message = "listen failed, " + lastErrorMessage();
} else {
epoll_event listenEvent;
listenEvent.events = 0;
listenEvent.data.ptr = nullptr;
if (epoll_ctl(dispatcher.getEpoll(), EPOLL_CTL_ADD, listener, &listenEvent) == -1) {
message = "epoll_ctl failed, " + lastErrorMessage();
} else {
context = nullptr;
return;
}
}
}
}
int result = close(listener);
assert(result != -1);
}
throw std::runtime_error("TcpListener::TcpListener, " + message);
}
TcpListener::TcpListener(Dispatcher& dispatcher, const Ipv4Address& addr, uint16_t port) : dispatcher(&dispatcher) {
std::string message;
listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listener == -1) {
message = "socket() failed, errno=" + std::to_string(errno);
} else {
int flags = fcntl(listener, F_GETFL, 0);
if (flags == -1 || (fcntl(listener, F_SETFL, flags | O_NONBLOCK) == -1)) {
message = "fcntl() failed errno=" + std::to_string(errno);
} else {
int on = 1;
if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on) == -1) {
message = "setsockopt failed, errno=" + std::to_string(errno);
} else {
sockaddr_in address;
address.sin_family = AF_INET;
address.sin_port = htons(port);
address.sin_addr.s_addr = htonl(addr.getValue());
if (bind(listener, reinterpret_cast<sockaddr*>(&address), sizeof address) != 0) {
message = "bind failed, errno=" + std::to_string(errno);
} else if (listen(listener, SOMAXCONN) != 0) {
message = "listen failed, errno=" + std::to_string(errno);
} else {
struct kevent event;
EV_SET(&event, listener, EVFILT_READ, EV_ADD | EV_DISABLE | EV_CLEAR, 0, SOMAXCONN, NULL);
if (kevent(dispatcher.getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
message = "kevent() failed, errno=" + std::to_string(errno);
} else {
context = nullptr;
return;
}
}
}
}
if (close(listener) == -1) {
message = "close failed, errno=" + std::to_string(errno);
}
}
throw std::runtime_error("TcpListener::TcpListener, " + message);
}
TcpListener::TcpListener(Dispatcher& dispatcher, const Ipv4Address& address, uint16_t port) : dispatcher(&dispatcher) {
std::string message;
listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listener == INVALID_SOCKET) {
message = "socket failed, " + errorMessage(WSAGetLastError());
} else {
sockaddr_in addressData;
addressData.sin_family = AF_INET;
addressData.sin_port = htons(port);
addressData.sin_addr.S_un.S_addr = htonl(address.getValue());
if (bind(listener, reinterpret_cast<sockaddr*>(&addressData), sizeof(addressData)) != 0) {
message = "bind failed, " + errorMessage(WSAGetLastError());
} else if (listen(listener, SOMAXCONN) != 0) {
message = "listen failed, " + errorMessage(WSAGetLastError());
} else {
GUID guidAcceptEx = WSAID_ACCEPTEX;
DWORD read = sizeof acceptEx;
if (acceptEx == nullptr && WSAIoctl(listener, SIO_GET_EXTENSION_FUNCTION_POINTER, &guidAcceptEx, sizeof guidAcceptEx, &acceptEx, sizeof acceptEx, &read, NULL, NULL) != 0) {
message = "WSAIoctl failed, " + errorMessage(WSAGetLastError());
} else {
assert(read == sizeof acceptEx);
if (CreateIoCompletionPort(reinterpret_cast<HANDLE>(listener), dispatcher.getCompletionPort(), 0, 0) != dispatcher.getCompletionPort()) {
message = "CreateIoCompletionPort failed, " + lastErrorMessage();
} else {
context = nullptr;
return;
}
}
}
int result = closesocket(listener);
assert(result == 0);
}
throw std::runtime_error("TcpListener::TcpListener, " + message);
}
TcpConnection TcpConnector::connect(const Ipv4Address& address, uint16_t port) {
assert(dispatcher != nullptr);
assert(context == nullptr);
if (dispatcher->interrupted()) {
throw InterruptedException();
}
std::string message;
int connection = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (connection == -1) {
message = "socket failed, " + lastErrorMessage();
} else {
sockaddr_in bindAddress;
bindAddress.sin_family = AF_INET;
bindAddress.sin_port = 0;
bindAddress.sin_addr.s_addr = INADDR_ANY;
if (bind(connection, reinterpret_cast<sockaddr*>(&bindAddress), sizeof bindAddress) != 0) {
message = "bind failed, " + lastErrorMessage();
} else {
int flags = fcntl(connection, F_GETFL, 0);
if (flags == -1 || fcntl(connection, F_SETFL, flags | O_NONBLOCK) == -1) {
message = "fcntl failed, " + lastErrorMessage();
} else {
sockaddr_in addressData;
addressData.sin_family = AF_INET;
addressData.sin_port = htons(port);
addressData.sin_addr.s_addr = htonl(address.getValue());
int result = ::connect(connection, reinterpret_cast<sockaddr *>(&addressData), sizeof addressData);
if (result == -1) {
if (errno == EINPROGRESS) {
ConnectorContext connectorContext;
connectorContext.context = dispatcher->getCurrentContext();
connectorContext.interrupted = false;
connectorContext.connection = connection;
struct kevent event;
EV_SET(&event, connection, EVFILT_WRITE, EV_ADD | EV_ENABLE, 0, 0, &connectorContext);
if (kevent(dispatcher->getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
message = "kevent failed, " + lastErrorMessage();
} else {
context = &connectorContext;
dispatcher->getCurrentContext()->interruptProcedure = [&] {
assert(dispatcher != nullptr);
assert(context != nullptr);
ConnectorContext* connectorContext = static_cast<ConnectorContext*>(context);
if (!connectorContext->interrupted) {
if (close(connectorContext->connection) == -1) {
throw std::runtime_error("TcpListener::stop, close failed, " + lastErrorMessage());
}
dispatcher->pushContext(connectorContext->context);
connectorContext->interrupted = true;
}
};
dispatcher->dispatch();
dispatcher->getCurrentContext()->interruptProcedure = nullptr;
assert(dispatcher != nullptr);
assert(connectorContext.context == dispatcher->getCurrentContext());
assert(context == &connectorContext);
context = nullptr;
connectorContext.context = nullptr;
if (connectorContext.interrupted) {
throw InterruptedException();
}
struct kevent event;
EV_SET(&event, connection, EVFILT_WRITE, EV_ADD | EV_DISABLE, 0, 0, NULL);
if (kevent(dispatcher->getKqueue(), &event, 1, NULL, 0, NULL) == -1) {
message = "kevent failed, " + lastErrorMessage();
} else {
int retval = -1;
socklen_t retValLen = sizeof(retval);
int s = getsockopt(connection, SOL_SOCKET, SO_ERROR, &retval, &retValLen);
if (s == -1) {
message = "getsockopt failed, " + lastErrorMessage();
} else {
if (retval != 0) {
message = "getsockopt failed, " + lastErrorMessage();
} else {
return TcpConnection(*dispatcher, connection);
}
}
}
}
}
} else {
return TcpConnection(*dispatcher, connection);
}
}
}
int result = close(connection);
if (result) {}
assert(result != -1);;
}
throw std::runtime_error("TcpConnector::connect, " + message);
}
TcpConnection TcpConnector::connect(const Ipv4Address& address, uint16_t port) {
assert(dispatcher != nullptr);
assert(context == nullptr);
if (dispatcher->interrupted()) {
throw InterruptedException();
}
std::string message;
SOCKET connection = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (connection == INVALID_SOCKET) {
message = "socket failed, result=" + std::to_string(WSAGetLastError());
} else {
sockaddr_in bindAddress;
bindAddress.sin_family = AF_INET;
bindAddress.sin_port = 0;
bindAddress.sin_addr.s_addr = INADDR_ANY;
if (bind(connection, reinterpret_cast<sockaddr*>(&bindAddress), sizeof bindAddress) != 0) {
message = "bind failed, result=" + std::to_string(WSAGetLastError());
} else {
GUID guidConnectEx = WSAID_CONNECTEX;
DWORD read = sizeof connectEx;
if (connectEx == nullptr && WSAIoctl(connection, SIO_GET_EXTENSION_FUNCTION_POINTER, &guidConnectEx, sizeof guidConnectEx, &connectEx, sizeof connectEx, &read, NULL, NULL) != 0) {
message = "WSAIoctl failed, result=" + std::to_string(WSAGetLastError());
} else {
assert(read == sizeof connectEx);
if (CreateIoCompletionPort(reinterpret_cast<HANDLE>(connection), dispatcher->getCompletionPort(), 0, 0) != dispatcher->getCompletionPort()) {
message = "CreateIoCompletionPort failed, result=" + std::to_string(GetLastError());
} else {
sockaddr_in addressData;
addressData.sin_family = AF_INET;
addressData.sin_port = htons(port);
addressData.sin_addr.S_un.S_addr = htonl(address.getValue());
TcpConnectorContext context2;
context2.hEvent = NULL;
if (connectEx(connection, reinterpret_cast<sockaddr*>(&addressData), sizeof addressData, NULL, 0, NULL, &context2) == TRUE) {
message = "ConnectEx returned immediately, which is not supported.";
} else {
int lastError = WSAGetLastError();
if (lastError != WSA_IO_PENDING) {
message = "ConnectEx failed, result=" + std::to_string(lastError);
} else {
context2.context = dispatcher->getCurrentContext();
context2.connection = connection;
context2.interrupted = false;
context = &context2;
dispatcher->getCurrentContext()->interruptProcedure = [&]() {
assert(dispatcher != nullptr);
assert(context != nullptr);
TcpConnectorContext* context2 = static_cast<TcpConnectorContext*>(context);
if (!context2->interrupted) {
if (CancelIoEx(reinterpret_cast<HANDLE>(context2->connection), context2) != TRUE) {
DWORD lastError = GetLastError();
if (lastError != ERROR_NOT_FOUND) {
throw std::runtime_error("TcpConnector::stop, CancelIoEx failed, result=" + std::to_string(GetLastError()));
}
context2->context->interrupted = true;
}
context2->interrupted = true;
}
};
dispatcher->dispatch();
dispatcher->getCurrentContext()->interruptProcedure = nullptr;
assert(context2.context == dispatcher->getCurrentContext());
assert(context2.connection == connection);
assert(dispatcher != nullptr);
assert(context == &context2);
context = nullptr;
DWORD transferred;
DWORD flags;
if (WSAGetOverlappedResult(connection, &context2, &transferred, FALSE, &flags) != TRUE) {
lastError = WSAGetLastError();
if (lastError != ERROR_OPERATION_ABORTED) {
message = "ConnectEx failed, result=" + std::to_string(lastError);
} else {
assert(context2.interrupted);
if (closesocket(connection) != 0) {
throw std::runtime_error("TcpConnector::connect, closesocket failed, result=" + std::to_string(WSAGetLastError()));
} else {
throw InterruptedException();
}
}
} else {
assert(transferred == 0);
assert(flags == 0);
DWORD value = 1;
if (setsockopt(connection, SOL_SOCKET, SO_UPDATE_CONNECT_CONTEXT, reinterpret_cast<char*>(&value), sizeof(value)) != 0) {
message = "setsockopt failed, result=" + std::to_string(WSAGetLastError());
} else {
return TcpConnection(*dispatcher, connection);
}
}
}
}
}
}
}
int result = closesocket(connection);
assert(result == 0);
}
throw std::runtime_error("TcpConnector::connect, " + message);
}
/*
* If we have an exact match, we return it.
* Otherwise, if we find a generic match, we return it.
* Otherwise, we return 0.
*/
Ipv4EndPointDemux::EndPoints
Ipv4EndPointDemux::Lookup (Ipv4Address daddr, uint16_t dport,
Ipv4Address saddr, uint16_t sport,
Ptr<Ipv4Interface> incomingInterface)
{
NS_LOG_FUNCTION (this << daddr << dport << saddr << sport << incomingInterface);
EndPoints retval1; // Matches exact on local port, wildcards on others
EndPoints retval2; // Matches exact on local port/adder, wildcards on others
EndPoints retval3; // Matches all but local address
EndPoints retval4; // Exact match on all 4
NS_LOG_DEBUG ("Looking up endpoint for destination address " << daddr);
for (EndPointsI i = m_endPoints.begin (); i != m_endPoints.end (); i++)
{
Ipv4EndPoint* endP = *i;
NS_LOG_DEBUG ("Looking at endpoint dport=" << endP->GetLocalPort ()
<< " daddr=" << endP->GetLocalAddress ()
<< " sport=" << endP->GetPeerPort ()
<< " saddr=" << endP->GetPeerAddress ());
if (endP->GetLocalPort () != dport)
{
NS_LOG_LOGIC ("Skipping endpoint " << &endP
<< " because endpoint dport "
<< endP->GetLocalPort ()
<< " does not match packet dport " << dport);
continue;
}
if (endP->GetBoundNetDevice ())
{
if (endP->GetBoundNetDevice () != incomingInterface->GetDevice ())
{
NS_LOG_LOGIC ("Skipping endpoint " << &endP
<< " because endpoint is bound to specific device and"
<< endP->GetBoundNetDevice ()
<< " does not match packet device " << incomingInterface->GetDevice ());
continue;
}
}
bool subnetDirected = false;
Ipv4Address incomingInterfaceAddr = daddr; // may be a broadcast
for (uint32_t i = 0; i < incomingInterface->GetNAddresses (); i++)
{
Ipv4InterfaceAddress addr = incomingInterface->GetAddress (i);
if (addr.GetLocal ().CombineMask (addr.GetMask ()) == daddr.CombineMask (addr.GetMask ()) &&
daddr.IsSubnetDirectedBroadcast (addr.GetMask ()))
{
subnetDirected = true;
incomingInterfaceAddr = addr.GetLocal ();
}
}
bool isBroadcast = (daddr.IsBroadcast () || subnetDirected == true);
NS_LOG_DEBUG ("dest addr " << daddr << " broadcast? " << isBroadcast);
bool localAddressMatchesWildCard =
endP->GetLocalAddress () == Ipv4Address::GetAny ();
bool localAddressMatchesExact = endP->GetLocalAddress () == daddr;
if (isBroadcast)
{
NS_LOG_DEBUG ("Found bcast, localaddr " << endP->GetLocalAddress ());
}
if (isBroadcast && (endP->GetLocalAddress () != Ipv4Address::GetAny ()))
{
localAddressMatchesExact = (endP->GetLocalAddress () ==
incomingInterfaceAddr);
}
// if no match here, keep looking
if (!(localAddressMatchesExact || localAddressMatchesWildCard))
continue;
bool remotePeerMatchesExact = endP->GetPeerPort () == sport;
bool remotePeerMatchesWildCard = endP->GetPeerPort () == 0;
bool remoteAddressMatchesExact = endP->GetPeerAddress () == saddr;
bool remoteAddressMatchesWildCard = endP->GetPeerAddress () ==
Ipv4Address::GetAny ();
// If remote does not match either with exact or wildcard,
// skip this one
if (!(remotePeerMatchesExact || remotePeerMatchesWildCard))
continue;
if (!(remoteAddressMatchesExact || remoteAddressMatchesWildCard))
continue;
// Now figure out which return list to add this one to
if (localAddressMatchesWildCard &&
remotePeerMatchesWildCard &&
remoteAddressMatchesWildCard)
{ // Only local port matches exactly
retval1.push_back (endP);
}
if ((localAddressMatchesExact || (isBroadcast && localAddressMatchesWildCard))&&
remotePeerMatchesWildCard &&
remoteAddressMatchesWildCard)
{ // Only local port and local address matches exactly
retval2.push_back (endP);
}
if (localAddressMatchesWildCard &&
remotePeerMatchesExact &&
remoteAddressMatchesExact)
{ // All but local address
retval3.push_back (endP);
}
if (localAddressMatchesExact &&
remotePeerMatchesExact &&
remoteAddressMatchesExact)
{ // All 4 match
retval4.push_back (endP);
}
}
// Here we find the most exact match
if (!retval4.empty ()) return retval4;
if (!retval3.empty ()) return retval3;
if (!retval2.empty ()) return retval2;
return retval1; // might be empty if no matches
}