add uTP support for outbound connections

1 files changed, 108 insertions, 0 deletions

diff --git a/src/libutp/libutp_inet_ntop.cpp b/src/libutp/libutp_inet_ntop.cpp
new file mode 100644
index 00000000..b0edf802
--- /dev/null
+++ b/src/libutp/libutp_inet_ntop.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2010-2013 BitTorrent, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include "libutp_inet_ntop.h"
+
+
+//######################################################################
+const char *libutp::inet_ntop(int af, const void *src, char *dest, size_t length)
+{
+	if (af != AF_INET && af != AF_INET6)
+	{
+		return NULL;
+	}
+
+	SOCKADDR_STORAGE address;
+	DWORD address_length;
+
+	if (af == AF_INET)
+	{
+		address_length = sizeof(sockaddr_in);
+		sockaddr_in* ipv4_address = (sockaddr_in*)(&address);
+		ipv4_address->sin_family = AF_INET;
+		ipv4_address->sin_port = 0;
+		memcpy(&ipv4_address->sin_addr, src, sizeof(in_addr));
+	}
+	else // AF_INET6
+	{
+		address_length = sizeof(sockaddr_in6);
+		sockaddr_in6* ipv6_address = (sockaddr_in6*)(&address);
+		ipv6_address->sin6_family = AF_INET6;
+		ipv6_address->sin6_port = 0;
+		ipv6_address->sin6_flowinfo = 0;
+		// hmmm
+		ipv6_address->sin6_scope_id = 0;
+		memcpy(&ipv6_address->sin6_addr, src, sizeof(in6_addr));
+	}
+
+	DWORD string_length = (DWORD)(length);
+	int result;
+	result = WSAAddressToStringA((sockaddr*)(&address),
+								 address_length, 0, dest,
+								 &string_length);
+
+	// one common reason for this to fail is that ipv6 is not installed
+
+	return result == SOCKET_ERROR ? NULL : dest;
+}
+
+//######################################################################
+int libutp::inet_pton(int af, const char* src, void* dest)
+{
+	if (af != AF_INET && af != AF_INET6)
+	{
+		return -1;
+	}
+
+	SOCKADDR_STORAGE address;
+	int address_length = sizeof(SOCKADDR_STORAGE);
+	int result = WSAStringToAddressA((char*)(src), af, 0,
+									 (sockaddr*)(&address),
+									 &address_length);
+
+	if (af == AF_INET)
+	{
+		if (result != SOCKET_ERROR)
+		{
+			sockaddr_in* ipv4_address =(sockaddr_in*)(&address);
+			memcpy(dest, &ipv4_address->sin_addr, sizeof(in_addr));
+		}
+		else if (strcmp(src, "255.255.255.255") == 0)
+		{
+			((in_addr*)(dest))->s_addr = INADDR_NONE;
+		}
+	}
+	else // AF_INET6
+	{
+		if (result != SOCKET_ERROR)
+		{
+			sockaddr_in6* ipv6_address = (sockaddr_in6*)(&address);
+			memcpy(dest, &ipv6_address->sin6_addr, sizeof(in6_addr));
+		}
+	}
+
+	return result == SOCKET_ERROR ? -1 : 1;
+}