[jreed-doxygen]Merge branch 'master' into jreed-doxygen

Handled conflict.
Also removed spaces on a blank line.

ChangeLog

+  200.  [bug]           Jelte
+	Fixed a bug where incoming TCP connections were not closed.
+	(Trac #589, git 1d88daaa24e8b1ab27f28be876f40a144241e93b)
+
   199.  [func]           ocean
 	Cache negative responses (NXDOMAIN/NODATA) from authoritative
 	server for recursive resolver.

src/lib/asiolink/dns_lookup.h

@@ -63,7 +63,8 @@ public:
     ///
     /// \param io_message The event message to handle
     /// \param message The DNS MessagePtr that needs handling
-    /// \param answer_message The DNS MessagePtr TODO
+    /// \param answer_message The final answer will be constructed in
+    ///                       this MessagePtr
     /// \param buffer The final answer is put here
     /// \param server DNSServer object to use
     virtual void operator()(const IOMessage& io_message,

src/lib/asiolink/tcp_server.cc

@@ -115,6 +115,7 @@ TCPServer::operator()(error_code ec, size_t length) {
         CORO_YIELD async_read(*socket_, asio::buffer(data_.get(),
                               TCP_MESSAGE_LENGTHSIZE), *this);
         if (ec) {
+            socket_->close();
             CORO_YIELD return;
         }
 
@@ -127,6 +128,7 @@ TCPServer::operator()(error_code ec, size_t length) {
         }
 
         if (ec) {
+            socket_->close();
             CORO_YIELD return;
         }
 
@@ -160,6 +162,7 @@ TCPServer::operator()(error_code ec, size_t length) {
         // If we don't have a DNS Lookup provider, there's no point in
         // continuing; we exit the coroutine permanently.
         if (lookup_callback_ == NULL) {
+            socket_->close();
             CORO_YIELD return;
         }
 
@@ -177,6 +180,9 @@ TCPServer::operator()(error_code ec, size_t length) {
         // The 'done_' flag indicates whether we have an answer
         // to send back.  If not, exit the coroutine permanently.
         if (!done_) {
+            // TODO: should we keep the connection open for a short time
+            // to see if new requests come in?
+            socket_->close();
             CORO_YIELD return;
         }
 
@@ -195,6 +201,10 @@ TCPServer::operator()(error_code ec, size_t length) {
         // (though we have nothing further to do, so the coroutine
         // will simply exit at that time).
         CORO_YIELD async_write(*socket_, bufs, *this);
+
+        // TODO: should we keep the connection open for a short time
+        // to see if new requests come in?
+        socket_->close();
     }
 }