X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Flistensocket.cpp;h=ae11c3b48238b3155cfb2b52c9de0f2dac97ecb2;hb=4c751dbbe8945e5efc230a59b0ed51c2ba10cf92;hp=0c6fd3b5c451bd516bee9699da552c3d5f87a8f8;hpb=a840ad3c174addc97e0ebecc3188006b42d34f35;p=user%2Fhenk%2Fcode%2Finspircd.git

diff --git a/src/listensocket.cpp b/src/listensocket.cpp
index 0c6fd3b5c..ae11c3b48 100644
--- a/src/listensocket.cpp
+++ b/src/listensocket.cpp
@@ -1,16 +1,23 @@
-/*       +------------------------------------+
- *       | Inspire Internet Relay Chat Daemon |
- *       +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
  *
- *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
- * See: http://wiki.inspircd.org/Credits
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
  *
- * This program is free but copyrighted software; see
- *            the file COPYING for details.
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
  *
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+
 #include "inspircd.h"
 #include "socket.h"
 #include "socketengine.h"
@@ -26,6 +33,24 @@ ListenSocket::ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_t
 	if (this->fd == -1)
 		return;
 
+#ifdef IPV6_V6ONLY
+	/* This OS supports IPv6 sockets that can also listen for IPv4
+	 * connections. If our address is "*" or empty, enable both v4 and v6 to
+	 * allow for simpler configuration on dual-stack hosts. Otherwise, if it
+	 * is "::" or an IPv6 address, disable support so that an IPv4 bind will
+	 * work on the port (by us or another application).
+	 */
+	if (bind_to.sa.sa_family == AF_INET6)
+	{
+		std::string addr = tag->getString("address");
+		/* This must be >= sizeof(DWORD) on Windows */
+		const int enable = (addr.empty() || addr == "*") ? 0 : 1;
+		/* This must be before bind() */
+		setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char *>(&enable), sizeof(enable));
+		// errors ignored intentionally
+	}
+#endif
+
 	ServerInstance->SE->SetReuse(fd);
 	int rv = ServerInstance->SE->Bind(this->fd, bind_to);
 	if (rv >= 0)
@@ -52,7 +77,8 @@ ListenSocket::~ListenSocket()
 	{
 		ServerInstance->SE->DelFd(this);
 		ServerInstance->Logs->Log("SOCKET", DEBUG,"Shut down listener on fd %d", this->fd);
-		if (ServerInstance->SE->Shutdown(this, 2) || ServerInstance->SE->Close(this))
+		ServerInstance->SE->Shutdown(this, 2);
+		if (ServerInstance->SE->Close(this) != 0)
 			ServerInstance->Logs->Log("SOCKET", DEBUG,"Failed to cancel listener: %s", strerror(errno));
 		this->fd = -1;
 	}
@@ -119,16 +145,14 @@ void ListenSocket::AcceptInternal()
 		{
 			// recreate as a sockaddr_in using the IPv4 IP
 			uint16_t sport = client.in6.sin6_port;
-			uint32_t addr = *reinterpret_cast<uint32_t*>(client.in6.sin6_addr.s6_addr + 12);
 			client.in4.sin_family = AF_INET;
 			client.in4.sin_port = sport;
-			client.in4.sin_addr.s_addr = addr;
+			memcpy(&client.in4.sin_addr.s_addr, client.in6.sin6_addr.s6_addr + 12, sizeof(uint32_t));
 
 			sport = server.in6.sin6_port;
-			addr = *reinterpret_cast<uint32_t*>(server.in6.sin6_addr.s6_addr + 12);
 			server.in4.sin_family = AF_INET;
 			server.in4.sin_port = sport;
-			server.in4.sin_addr.s_addr = addr;
+			memcpy(&server.in4.sin_addr.s_addr, server.in6.sin6_addr.s6_addr + 12, sizeof(uint32_t));
 		}
 	}