void start_ethernet(IPAddress ipAddress, IPAddress netMask, IPAddress gateWay, netif_status_callback_fn status_cb)
{
struct ip_addr x_ip_addr, x_net_mask, x_gateway;
extern err_t ethernetif_init(struct netif *netif);
x_ip_addr.addr = ipAddress.GetV4LittleEndian();
if (x_ip_addr.addr == 0)
{
x_net_mask.addr = 0;
x_gateway.addr = 0;
}
else
{
x_net_mask.addr = netMask.GetV4LittleEndian();
x_gateway.addr = gateWay.GetV4LittleEndian();
}
/* Add data to netif */
netif_add(&gs_net_if, &x_ip_addr, &x_net_mask, &x_gateway, NULL, ethernetif_init, ethernet_input);
/* Make it the default interface */
netif_set_default(&gs_net_if);
/* Setup callback function for netif status change */
netif_set_status_callback(&gs_net_if, status_cb);
/* Bring it up */
if (x_ip_addr.addr == 0)
{
/* DHCP mode */
dhcp_start(&gs_net_if);
}
else
{
/* Static mode */
netif_set_up(&gs_net_if);
}
}
bool EspDrv::getGateway(IPAddress& gw)
{
LOGDEBUG(F("> getGateway"));
char buf[20];
if (sendCmdGet(F("AT+CIPSTA?"), F("+CIPSTA:gateway:\""), F("\""), buf, sizeof(buf)))
{
gw.fromString (buf);
return true;
}
return false;
}
bool EthernetClient::connect(IPAddress& host,int port) {
fd = socket(AF_INET,SOCK_STREAM,0);
if (fd == -1) return false;
memset(&servaddr,0,sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = inet_addr(host.getAddress());
servaddr.sin_port = htons(port);
int res = ::connect(fd,(struct sockaddr*)&servaddr,sizeof(servaddr));
return ( res != -1 );
} // connect(IPAddress&,...)
bool IPAddress::operator<(const IPAddress& ha) const {
if (AddressFamily != ha.AddressFamily)
return (int)get_AddressFamily() < (int)ha.get_AddressFamily();
switch ((int)get_AddressFamily()) {
case AF_DOMAIN_NAME:
return m_domainname < ha.m_domainname;
case AF_INET:
return memcmp(&m_sin.sin_addr, &ha.m_sin.sin_addr, 4) < 0;
case AF_INET6:
return memcmp(&m_sin6.sin6_addr, &ha.m_sin6.sin6_addr, 16) < 0;
default:
Throw(ExtErr::UnknownHostAddressType);
}
}
IPAddress IPAddress::operator ^ (const IPAddress& other) const
{
if (family() == other.family())
{
if (family() == IPv4)
{
IPv4AddressImpl t(pImpl()->addr());
IPv4AddressImpl o(other.pImpl()->addr());
return IPAddress((t ^ o).addr(), sizeof(struct in_addr));
}
#if defined(POCO_HAVE_IPv6)
else if (family() == IPv6)
{
const IPv6AddressImpl t(pImpl()->addr(), pImpl()->scope());
const IPv6AddressImpl o(other.pImpl()->addr(), other.pImpl()->scope());
const IPv6AddressImpl r = t ^ o;
return IPAddress(r.addr(), sizeof(struct in6_addr), r.scope());
}
#endif
else throw Poco::InvalidArgumentException("Invalid or unsupported address family passed to IPAddress()");
}
else throw Poco::InvalidArgumentException("Invalid or unsupported address family passed to IPAddress()");
}
BinaryWriter& AFXAPI operator<<(BinaryWriter& wr, const IPAddress& ha) {
wr << (short)ha.get_AddressFamily();
switch ((int)ha.get_AddressFamily()) {
case AF_INET:
wr.Write(&ha.m_sin.sin_addr, sizeof(ha.m_sin.sin_addr));
break;
case AF_INET6:
wr.Write(&ha.m_sin6.sin6_addr, sizeof(ha.m_sin6.sin6_addr));
break;
default:
wr.Write(&ha.m_sockaddr, sizeof(ha.m_sockaddr)); //!!! unknown size
break;
}
return wr;
}
bool UdpConnection::connect(IPAddress ip, uint16_t port)
{
if (udp == NULL)
initialize();
if (udp->local_port == 0)
{
udp_bind(udp, IP_ADDR_ANY, 0);
debugf("UDP LocalPort: %d", udp->local_port);
}
debugf("UDP connect to %s:%d", ip.toString().c_str(), port);
err_t res = udp_connect(udp, ip, port);
return res == ERR_OK;
}
void NetworkInterfaceTest::testMap()
{
NetworkInterface::Map m = NetworkInterface::map(false, false);
assert (!m.empty());
for (NetworkInterface::Map::const_iterator it = m.begin(); it != m.end(); ++it)
{
std::cout << std::endl << "=============" << std::endl;
std::cout << "Index: " << it->second.index() << std::endl;
std::cout << "Name: " << it->second.name() << std::endl;
std::cout << "DisplayName: " << it->second.displayName() << std::endl;
std::cout << "Status: " << (it->second.isUp() ? "Up" : "Down") << std::endl;
NetworkInterface::MACAddress mac(it->second.macAddress());
if (!mac.empty() && (it->second.type() != NetworkInterface::NI_TYPE_SOFTWARE_LOOPBACK))
std::cout << "MAC Address: (" << it->second.type() << ") " << mac << std::endl;
typedef NetworkInterface::AddressList List;
const List& ipList = it->second.addressList();
List::const_iterator ipIt = ipList.begin();
List::const_iterator ipEnd = ipList.end();
for (int counter = 0; ipIt != ipEnd; ++ipIt, ++counter)
{
std::cout << std::endl << "----------" << std::endl;
std::cout << "Address " << counter << std::endl;
std::cout << "----------" << std::endl;
std::cout << "Address: " << ipIt->get<NetworkInterface::IP_ADDRESS>() << std::endl;
IPAddress addr = ipIt->get<NetworkInterface::SUBNET_MASK>();
if (!addr.isWildcard()) std::cout << "Subnet: " << addr << " (/" << addr.prefixLength() << ")" << std::endl;
addr = ipIt->get<NetworkInterface::BROADCAST_ADDRESS>();
if (!addr.isWildcard()) std::cout << "Broadcast: " << addr << std::endl;
}
std::cout << "=============" << std::endl << std::endl;
}
}
bool EPDStreamer::connect(const char *host, uint16_t port)
{
if (connState != STATE_CONN_DISCONNECTED) {
return false;
}
callbacksEnabled = true;
IPAddress ip;
connState = STATE_CONN_CONNECTING;
Serial.print("Attempting connection to: ");
Serial.print(host);
Serial.print(":");
Serial.println(port);
bool connectionSuccess;
if (ip.fromString(host)) {
Serial.println("Skipping name resolution");
connectionSuccess = client.connect(ip, port);
} else {
connectionSuccess = client.connect(host, port);
}
if (connectionSuccess) {
Serial.println("Connected");
connState = STATE_CONN_CONNECTED;
return true;
} else {
Serial.println("Connection failed");
connState = STATE_CONN_DISCONNECTED;
return false;
}
}
void TunManager::addProbedAddr(int ifIndex, const IPAddress& addr,
uint8_t mask) {
for (auto& intf : intfs_) {
if (intf.second->getIfIndex() == ifIndex) {
intf.second->addAddress(addr, mask);
return;
}
}
// This function is called for all interface addresses discovered from
// the host. Since we only create TunIntf object for TUN interfaces,
// it is normal we cannot find the interface matching the ifIndex provided.
VLOG(3) << "Cannot find interface @ index " << ifIndex
<< " for probed address " << addr.str() << "/"
<< static_cast<int>(mask);
}
void SocketDefaultImpl::bind(const IPAddress &ip) {
if (!isOpen()) open();
struct sockaddr_in addr;
memset((void *)&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(ip.getPort());
addr.sin_addr.s_addr = htonl((unsigned)ip ? (unsigned)ip : INADDR_ANY);
SysError::clear();
if (::bind((socket_t)socket, (struct sockaddr *)&addr, sizeof(addr)) ==
SOCKET_ERROR)
THROWS("Could not bind socket to " << ip << ": " << SysError());
}
int EthernetClient::connect(IPAddress ip, uint16_t port)
{
if (m_sock)
return 0;
struct sockaddr_in sin = {0};
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr.s_addr = *(uint32_t*) (ip.raw_address());
m_sock = socket(AF_INET, SOCK_STREAM, 0);
if (::connect(m_sock, (struct sockaddr *) &sin, sizeof(sin)) < 0)
{
trace("Error Connecting(%d)%s\n", errno, strerror(errno));
return false;
}
m_connected = true;
return 1;
}
bool
WhiteListCache::IsWhitelisted(const String &fromAddress, const IPAddress &address)
{
// Create a lock for shared operations
boost::upgrade_lock< boost::shared_mutex > lock(_whitelistAccessMutex);
if (_needRefresh)
{
// We need exclusive access to be able to upade the cache
boost::upgrade_to_unique_lock< boost::shared_mutex > uniqueLock(lock);
Refresh();
}
vector<shared_ptr<WhiteListAddress> >::iterator iter = _whitelistItems.begin();
vector<shared_ptr<WhiteListAddress> >::iterator iterEnd = _whitelistItems.end();
for (; iter != iterEnd; iter++)
{
shared_ptr<WhiteListAddress> pWhiteAddress = (*iter);
IPAddress iLowerIP = pWhiteAddress->GetLowerIPAddress();
IPAddress iUpperIP = pWhiteAddress->GetUpperIPAddress();
if (address.WithinRange(iLowerIP, iUpperIP))
{
String sWhiteEmailAddr = pWhiteAddress->GetEmailAddress();
if (sWhiteEmailAddr.IsEmpty() || sWhiteEmailAddr == _T("*"))
{
// White listed
return true;
}
// Check if the senders email address matches
if (StringParser::WildcardMatchNoCase(sWhiteEmailAddr, fromAddress))
{
// White listed
return true;
}
}
}
return false;
}
HostEntry DNS::hostByAddress(const IPAddress& address, unsigned
#ifdef POCO_HAVE_ADDRINFO
hintFlags
#endif
)
{
#if defined(POCO_HAVE_LIBRESOLV)
Poco::ScopedReadRWLock readLock(resolverLock);
#endif
#if defined(POCO_HAVE_ADDRINFO)
SocketAddress sa(address, 0);
static char fqname[1024];
int rc = getnameinfo(sa.addr(), sa.length(), fqname, sizeof(fqname), NULL, 0, NI_NAMEREQD);
if (rc == 0)
{
struct addrinfo* pAI;
struct addrinfo hints;
std::memset(&hints, 0, sizeof(hints));
hints.ai_flags = hintFlags;
rc = getaddrinfo(fqname, NULL, &hints, &pAI);
if (rc == 0)
{
HostEntry result(pAI);
freeaddrinfo(pAI);
return result;
}
else
{
aierror(rc, address.toString());
}
}
else
{
aierror(rc, address.toString());
}
#elif defined(POCO_VXWORKS)
char name[MAXHOSTNAMELEN + 1];
if (hostGetByAddr(*reinterpret_cast<const int*>(address.addr()), name) == OK)
{
return HostEntry(std::string(name), address);
}
#else
struct hostent* he = gethostbyaddr(reinterpret_cast<const char*>(address.addr()), address.length(), address.af());
if (he)
{
return HostEntry(he);
}
#endif
int err = lastError();
error(err, address.toString()); // will throw an appropriate exception
throw NetException(); // to silence compiler
}
HostBinding::HostBinding(IPAddress addr) : name(addr.toString())
{
this->Init();
try
{
this->host = DNS::hostByAddress(addr);
}
catch (HostNotFoundException&)
{
this->invalid = true;
//TODO: improve this exception so we can properly raise
}
catch (NoAddressFoundException&)
{
this->invalid = true;
//TODO: improve this exception so we can properly raise
}
}
/** @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()));
}
void onReceive(UdpConnection& connection, char *data, int size, IPAddress remoteIP, uint16_t remotePort)
{
char buf[60];
char buf1[12];
sendToClients("UDP received");
debugf("UDP Sever callback from %s:%d, %d bytes", remoteIP.toString().c_str(), remotePort, size);
// We implement string mode server for example
Serial.print(">\t");
Serial.print(data);
floatAnalog = atof(analogResult.c_str()) / 10.0;
dtostrf(floatAnalog, 7, 4, buf1);
sprintf(buf, "%s", deblank(buf1));
String message = String(buf);
udp.sendStringTo(remoteIP, udpServerPort, message);
}
//----------------------------------------------------------------------------
bool IPAddress::TryParse(const std::string &addr, IPAddress& result)
{
IPAddressImpl *impl = IPv4AddressImpl::Parse(addr);
#if defined(PX2_HAVE_IPV6)
if (!impl)
{
impl = IPv6AddressImpl::Parse(addr);
}
#endif
if (impl)
{
result.Init(impl);
return true;
}
return false;
}
//Constructor
UDPClient::UDPClient(int32_t v4_port, int32_t v6_port, const IPAddress& address):
addr(address),myIP(myIPAddress::singleton())
{
if(address.isIPv6())
slen=sizeof(ipv6_addr);
else
slen=sizeof(ipv4_addr);
active = false;
connected = false;
intIPv4_Port = v4_port;
intIPv6_Port = v6_port;
conTrack = 0;
resetVal = 15;
broadcast = false;
openSocket();
}
AsyncResultPtr Socket::BeginConnect(u_short port, IPAddress address, AsyncCallback callback, const ObjectPtr &asyncState)
{
AsyncResultPtr asyncResult(this, Nothing, asyncState, Nothing, callback);
asyncResult->AddRef();
sockaddr_in name;
name.sin_family = AF_INET;
name.sin_port = htons(port);
name.sin_addr.s_addr = htonl(address.Address());
SocketProvider &msp = SocketProvider::GetSingleton();
if (!msp.ConnectEx(hSocket, (SOCKADDR *)&name, sizeof(SOCKADDR), 0, 0, 0, asyncResult.operator ->())
&& WSAGetLastError() != WSA_IO_PENDING)
{
asyncResult->Release();
throw Win32Exception("ConnectEx");
}
return asyncResult;
}
bool operator <(const IPAddress &a, const IPAddress &b)
{
for (int i = 0; i < 4; ++i)
{
if (a.part(i) < b.part(i))
{
return true;
}
else if (a.part(i) > b.part(i))
{
return false;
}
}
return a.port() < b.port();
}
int WiFiClass::hostByName(const char* aHostname, IPAddress& aResult)
{
// check if aHostname is already an ipaddress
if (aResult.fromString(aHostname)) {
// if fromString returns true we have an IP address ready
return 1;
} else {
// Network led ON (rev A then rev B).
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 0);
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 0);
// Send DNS request:
_resolve = 0;
if (gethostbyname((uint8 *)aHostname) < 0) {
// Network led OFF (rev A then rev B).
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 1);
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 1);
return 0;
}
// Wait for connection or timeout:
unsigned long start = millis();
while (_resolve == 0 && millis() - start < 20000) {
m2m_wifi_handle_events(NULL);
}
// Network led OFF (rev A then rev B).
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO16, 1);
m2m_periph_gpio_set_val(M2M_PERIPH_GPIO5, 1);
if (_resolve == 0) {
return 0;
}
aResult = _resolve;
return 1;
}
}
HostEntry DNS::hostByAddress(const IPAddress& address)
{
NetworkInitializer networkInitializer;
#if defined(POCO_HAVE_IPv6) || defined(POCO_HAVE_ADDRINFO)
SocketAddress sa(address, 0);
static char fqname[1024];
int rc = getnameinfo(sa.addr(), sa.length(), fqname, sizeof(fqname), NULL, 0, NI_NAMEREQD);
if (rc == 0)
{
struct addrinfo* pAI;
struct addrinfo hints;
std::memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
rc = getaddrinfo(fqname, NULL, &hints, &pAI);
if (rc == 0)
{
HostEntry result(pAI);
freeaddrinfo(pAI);
return result;
}
else
{
aierror(rc, address.toString());
}
}
else
{
aierror(rc, address.toString());
}
#elif defined(POCO_VXWORKS)
char name[MAXHOSTNAMELEN + 1];
if (hostGetByAddr(*reinterpret_cast<const int*>(address.addr()), name) == OK)
{
return HostEntry(std::string(name), address);
}
#else
struct hostent* he = gethostbyaddr(reinterpret_cast<const char*>(address.addr()), address.length(), address.af());
if (he)
{
return HostEntry(he);
}
#endif
int err = lastError();
error(err, address.toString()); // will throw an appropriate exception
throw NetException(); // to silence compiler
}
DNSHandler::HostType DNSHandler::ResolvePTR (IPAddress ip) {
// Hostname to query
String name;
if (ip.IsV6()) {
// Convert the IPv6 address to an
// integer
auto num=static_cast<UInt128>(ip);
// Extract each nibble
for (Word i=0;i<(sizeof(num)*2);++i,num>>=4) name << String(
num&static_cast<UInt128>(
15 // Low 4 bits set
),
16 // Hexadecimal
) << domain_separator;
name << ipv6_ptr;
} else {
// BEWARE blocking method!!
bool DNS::HostByAddress(Exception& ex,const IPAddress& address, HostEntry& host) {
if (!Net::InitializeNetwork(ex))
return false;
SocketAddress sa;
sa.set(address, 0);
static char fqname[1024];
int rc = getnameinfo(sa.addr(), sa.size(), fqname, sizeof(fqname), NULL, 0, NI_NAMEREQD);
if (rc == 0) {
struct addrinfo* pAI;
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
rc = getaddrinfo(fqname, NULL, &hints, &pAI);
if (rc == 0) {
host.set(ex, pAI);
freeaddrinfo(pAI);
return true;
}
}
SetAIError(ex, rc, " (address=",address.toString(),")");
return false;
}
bool
TCPServer::FireOnAcceptEvent(const IPAddress &remoteAddress, int port)
{
// Fire an event...
if (!Configuration::Instance()->GetUseScriptServer())
return true;
shared_ptr<ClientInfo> pCliInfo = shared_ptr<ClientInfo>(new ClientInfo);
pCliInfo->SetIPAddress(remoteAddress.ToString());
pCliInfo->SetPort(port);
shared_ptr<ScriptObjectContainer> pContainer = shared_ptr<ScriptObjectContainer>(new ScriptObjectContainer);
shared_ptr<Result> pResult = shared_ptr<Result>(new Result);
pContainer->AddObject("Result", pResult, ScriptObject::OTResult);
pContainer->AddObject("HMAILSERVER_CLIENT", pCliInfo, ScriptObject::OTClient);
String sEventCaller;
String sScriptLanguage = Configuration::Instance()->GetScriptLanguage();
if (sScriptLanguage == _T("VBScript"))
sEventCaller.Format(_T("OnClientConnect(HMAILSERVER_CLIENT)"));
else if (sScriptLanguage == _T("JScript"))
sEventCaller.Format(_T("OnClientConnect(HMAILSERVER_CLIENT);"));
ScriptServer::Instance()->FireEvent(ScriptServer::EventOnClientConnect, sEventCaller, pContainer);
switch (pResult->GetValue())
{
case 1:
{
// Disconnect the socket immediately.
return false;
}
}
return true;
}
////////////////////////////////////////////////////////////
/// Send an array of bytes
////////////////////////////////////////////////////////////
Socket::Status SocketUDP::Send(const char* Data, std::size_t Size, const IPAddress& Address, unsigned short Port)
{
// Make sure the socket is valid
if (!IsValid())
Create();
// Check parameters
if (Data && Size)
{
// Build the target address
sockaddr_in Target;
Target.sin_family = AF_INET;
Target.sin_port = htons(Port);
Target.sin_addr.s_addr = inet_addr(Address.ToString().c_str());
memset(Target.sin_zero, 0, sizeof(Target.sin_zero));
// Loop until every byte has been sent
int Sent = 0;
int SizeToSend = static_cast<int>(Size);
for (int Length = 0; Length < SizeToSend; Length += Sent)
{
// Send a chunk of data
Sent = (int)sendto(mySocket, Data + Length, SizeToSend - Length, 0, reinterpret_cast<sockaddr*>(&Target), sizeof(Target));
// Check errors
if (Sent <= 0)
return SocketHelper::GetErrorStatus();
}
return Socket::Done;
}
else
{
// Error...
std::cerr << "Cannot send data over the network (invalid parameters)" << std::endl;
return Socket::Error;
}
}
////////////////////////////////////////////////////////////
/// Connect to another computer on a specified port
////////////////////////////////////////////////////////////
bool SocketTCP::Connect(unsigned short Port, const IPAddress& HostAddress)
{
// Make sure our socket is valid
if (!IsValid())
Create();
// Build the host address
sockaddr_in SockAddr;
memset(SockAddr.sin_zero, 0, sizeof(SockAddr.sin_zero));
SockAddr.sin_addr.s_addr = inet_addr(HostAddress.ToString().c_str());
SockAddr.sin_family = AF_INET;
SockAddr.sin_port = htons(Port);
// Connect
if (connect(mySocket, reinterpret_cast<sockaddr*>(&SockAddr), sizeof(SockAddr)) == -1)
{
// Error...
std::cerr << "Failed to connect socket to host " << HostAddress << std::endl;
return false;
}
return true;
}
void Socket::Connect(IPAddress &remoteAddress, unsigned short remotePort)
{
struct sockaddr_in sockin;
// Fill the struct.
sockin.sin_family = AF_INET;
sockin.sin_addr.s_addr = inet_addr( remoteAddress.toString() );
sockin.sin_port = htons( remotePort );
// Fill in internal storage variables.
connectAddr = remoteAddress;
RemotePort = remotePort;
// Attempt a connection.
if ( connect( connection, (const sockaddr *)&sockin, sizeof(sockin) ) == SOCKET_ERROR )
{
Log::Msg("Could not connect to the server.", Log::FatalError);
}
else
{
Log::Msg("Successfully connected to the server.", Log::Info);
}
}
int32_t MTD_FLASHMEM ICMP::ping(IPAddress const& dest)
{
static uint32_t const TIMEOUT = 4000;
static int32_t const TIMEOUT_RESULT = -1;
uint32_t result = TIMEOUT_RESULT;
// generate seq
m_waitingSeq++;
// prepare packet to send
pbuf* hdrbuf = pbuf_alloc(PBUF_IP, sizeof(icmp_echo_hdr), PBUF_RAM);
icmp_echo_hdr* hdr = (icmp_echo_hdr*)hdrbuf->payload;
hdr->type = ICMP_ECHO;
hdr->code = 0;
hdr->chksum = 0;
hdr->id = htons(m_waitingID);
hdr->seqno = htons(m_waitingSeq);
hdr->chksum = inet_chksum((uint16_t*)hdr, sizeof(icmp_echo_hdr));
// send Echo request
raw_pcb* pcb = raw_new(IP_PROTO_ICMP);
raw_recv(pcb, ICMP::raw_recv_fn, this);
raw_bind(pcb, IP_ADDR_ANY);
ip_addr_t addr = dest.get_ip_addr_t();
raw_sendto(pcb, hdrbuf, &addr);
pbuf_free(hdrbuf);
uint32_t t1 = micros();
if (m_queue.receive(TIMEOUT))
result = (micros() - t1);
raw_remove(pcb);
return result;
}