Feature net udp (#2347)

* add PMTU discovery #2329

* add socket gather/scatter capabilities #2330 (win, udp)

* enable WSAPoll

* add FastMemoryPool

* add receiveFrom() with native args

* allow copying of StringTokenizer

* add AtomicFlag and SpinlockMutex

* update .gitignore

* UDPServer and client #2343 (windows)

* fix warnings

* fix warnings

* regenerate Net VS solutions

* regenerate CppUnit projects/solutions

* clang fixes

* gcc fixes

* try to fix travis

* more travis fixes

* more travis fixes

* handle UDPClient exception

* fix makefiles and init order warnings

* add UNIX gather/scatter sendto/recvfrom implementations and tests

* run travis tests as sudo

* try to run tests as sudo, 2nd attempt

* fix warning

* use mutex in reactor

* lock-order-inversion in SocketReactor #2346

* add PMTU discovery #2329 (linux)

* ICMPSocket does not check reply address #1921

* remove some ignored tests

* add PMTU discovery #2329 (reconcile logic with #1921)

* fix native receiveFrome()

* reinstate ignoring of proxy errors

* add testMTU to ignore list

* add include atomic

* NTPClient not checking reply address #2348

* some ICMP/MTU fixes

* UDPSocketReader cleanup

* resolve some socket inheritance warnings

* add NTP time sync to ignored tests

* SocketNotifier not thread-safe #2345

* prevent x64 samples build attempt for win32

* build TestApp and Library

* fix ICMP tests

* regen VS projects

* regen VS projects and add missing 2012 files

* remove debug prints

Net/src/Socket.cpp

@@ -389,4 +389,79 @@ int Socket::select(SocketList& readList, SocketList& writeList, SocketList& exce
 }
 
 
+SocketBufVec Socket::makeBufVec(std::size_t size, std::size_t bufLen)
+{
+	SocketBufVec buf(size);
+	SocketBufVec::iterator it = buf.begin();
+	SocketBufVec::iterator end = buf.end();
+	for (; it != end; ++it)
+	{
+		// TODO: use memory pool
+		*it = makeBuffer(malloc(bufLen), bufLen);
+	}
+	return buf;
+}
+
+
+void Socket::destroyBufVec(SocketBufVec& buf)
+{
+	SocketBufVec::iterator it = buf.begin();
+	SocketBufVec::iterator end = buf.end();
+	for (; it != end; ++it)
+	{
+#if defined(POCO_OS_FAMILY_WINDOWS)
+		free(it->buf);
+#elif defined(POCO_OS_FAMILY_UNIX)
+		free(it->iov_base);
+#endif
+	}
+	SocketBufVec().swap(buf);
+}
+
+
+SocketBuf Socket::makeBuffer(void* buffer, std::size_t length)
+{
+	SocketBuf ret;
+#if defined(POCO_OS_FAMILY_WINDOWS)
+	ret.buf = reinterpret_cast<char*>(buffer);
+	ret.len = static_cast<ULONG>(length);
+#elif defined(POCO_OS_FAMILY_UNIX)
+	ret.iov_base = buffer;
+	ret.iov_len = length;
+#else
+	throw NotImplementedException("Socket::makeBuffer(void*, size_t)");
+#endif
+	return ret;
+}
+
+
+SocketBufVec Socket::makeBufVec(const std::vector<char*>& vec)
+{
+	SocketBufVec buf(vec.size());
+	SocketBufVec::iterator it = buf.begin();
+	SocketBufVec::iterator end = buf.end();
+	std::vector<char*>::const_iterator vIt = vec.begin();
+	for (; it != end; ++it, ++vIt)
+	{
+		*it = makeBuffer(*vIt, strlen(*vIt));
+	}
+	return buf;
+}
+
+
+SocketBufVec Socket::makeBufVec(const std::vector<std::string>& vec)
+{
+	SocketBufVec buf(vec.size());
+	SocketBufVec::iterator it = buf.begin();
+	SocketBufVec::iterator end = buf.end();
+	std::vector<std::string>::const_iterator vIt = vec.begin();
+	for (; it != end; ++it, ++vIt)
+	{
+		char* c = const_cast<char*>(vIt->data());
+		*it = makeBuffer(reinterpret_cast<void*>(c), vIt->size());
+	}
+	return buf;
+}
+
+
 } } // namespace Poco::Net