Do not use boost::optional for TcpSocket

Older boost versions require T to be copy-constructable in optional<T>. This
is not the case for TcpSocket, which is only move-constructable.

Fixes compilation on debian jessie

3 files changed, 21 insertions, 8 deletions

diff --git a/src/TcpSocket.cpp b/src/TcpSocket.cpp
index 433e5c1..6791286 100644
--- a/src/TcpSocket.cpp
+++ b/src/TcpSocket.cpp
@@ -116,6 +116,11 @@ TcpSocket::~TcpSocket()
     close();
 }
 
+bool TcpSocket::isValid()
+{
+    return m_sock != INVALID_SOCKET;
+}
+
 ssize_t TcpSocket::recv(void* data, size_t size)
 {
     ssize_t ret = ::recv(m_sock, (char*)data, size, 0);
@@ -167,7 +172,7 @@ TcpSocket TcpSocket::accept()
     }
 }
 
-boost::optional<TcpSocket> TcpSocket::accept(int timeout_ms)
+TcpSocket TcpSocket::accept(int timeout_ms)
 {
     struct pollfd fds[1];
     fds[0].fd = m_sock;
@@ -184,7 +189,8 @@ boost::optional<TcpSocket> TcpSocket::accept(int timeout_ms)
         return accept();
     }
     else {
-        return boost::none;
+        TcpSocket invalidsock(0, "");
+        return invalidsock;
     }
 }
 
diff --git a/src/TcpSocket.h b/src/TcpSocket.h
index 8df913f..660515d 100644
--- a/src/TcpSocket.h
+++ b/src/TcpSocket.h
@@ -46,7 +46,7 @@
 #include <iostream>
 #include <string>
 
-#include <boost/optional.hpp>
+#include <memory>
 
 /**
  *  This class represents a TCP socket.
@@ -70,7 +70,9 @@ class TcpSocket
         TcpSocket(const TcpSocket& other) = delete;
         TcpSocket& operator=(const TcpSocket& other) = delete;
 
-        int close();
+        bool isValid(void);
+
+        int close(void);
 
         /** Send data over the TCP connection.
          *  @param data The buffer that will be sent.
@@ -88,7 +90,12 @@ class TcpSocket
 
         void listen(void);
         TcpSocket accept(void);
-        boost::optional<TcpSocket> accept(int timeout_ms);
+
+        /* Returns either valid socket if a connection was
+         * accepted before the timeout expired, or an invalid
+         * socket otherwise.
+         */
+        TcpSocket accept(int timeout_ms);
 
         /** Retrieve address this socket is bound to */
         InetAddress getOwnAddress() const;
diff --git a/src/dabOutput/dabOutputTcp.cpp b/src/dabOutput/dabOutputTcp.cpp
index 94d379e..975fdff 100644
--- a/src/dabOutput/dabOutputTcp.cpp
+++ b/src/dabOutput/dabOutputTcp.cpp
@@ -133,9 +133,9 @@ class TCPDataDispatcher
 
                 while (m_running) {
                     // Add a new TCPConnection to the list, constructing it from the client socket
-                    auto optional_sock = m_listener_socket.accept(timeout_ms);
-                    if (optional_sock) {
-                        m_connections.emplace(m_connections.begin(), std::move(*optional_sock));
+                    auto sock = m_listener_socket.accept(timeout_ms);
+                    if (sock.isValid()) {
+                        m_connections.emplace(m_connections.begin(), move(sock));
                     }
                 }
             }