From b74b895dd44f5a76d581b8dec65dbf76dd5cece9 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 6 May 2019 11:45:08 +0200
Subject: Move TCPDataDispatcher into TcpSocket

---
 src/TcpSocket.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 53 insertions(+), 4 deletions(-)

(limited to 'src/TcpSocket.h')

diff --git a/src/TcpSocket.h b/src/TcpSocket.h
index 9ff09e5..ec7afd3 100644
--- a/src/TcpSocket.h
+++ b/src/TcpSocket.h
@@ -2,7 +2,7 @@
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
    Right of Canada (Communications Research Center Canada)
 
-   Copyright (C) 2017
+   Copyright (C) 2019
    Matthias P. Braendli, matthias.braendli@mpb.li
 
     http://www.opendigitalradio.org
@@ -32,6 +32,7 @@
 #endif
 
 #include "InetAddress.h"
+#include "ThreadsafeQueue.h"
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <unistd.h>
@@ -45,8 +46,11 @@
 
 #include <iostream>
 #include <string>
-
+#include <vector>
 #include <memory>
+#include <atomic>
+#include <thread>
+#include <list>
 
 /**
  *  This class represents a TCP socket.
@@ -77,8 +81,8 @@ class TcpSocket
         /** Send data over the TCP connection.
          *  @param data The buffer that will be sent.
          *  @param size Number of bytes to send.
-         *  @param timeout_ms number of milliseconds before timeout
-         *  return number of bytes sent or -1 if error
+         *  @param timeout_ms number of milliseconds before timeout, or 0 for infinite timeout
+         *  return number of bytes sent, 0 on timeout, or throws runtime_error.
          */
         ssize_t send(const void* data, size_t size, int timeout_ms=0);
 
@@ -112,4 +116,49 @@ class TcpSocket
         SOCKET m_sock;
 };
 
+/* Helper class for TCPDataDispatcher, contains a queue of pending data and
+ * a sender thread. */
+class TCPConnection
+{
+    public:
+        TCPConnection(TcpSocket&& sock);
+        TCPConnection(const TCPConnection&) = delete;
+        TCPConnection& operator=(const TCPConnection&) = delete;
+        ~TCPConnection();
+
+        ThreadsafeQueue<std::vector<uint8_t> > queue;
+
+    private:
+        std::atomic<bool> m_running;
+        std::thread m_sender_thread;
+        TcpSocket m_sock;
+
+        void process(void);
+};
+
+/* Send a TCP stream to several destinations, and automatically disconnect destinations
+ * whose buffer overflows.
+ */
+class TCPDataDispatcher
+{
+    public:
+        TCPDataDispatcher(size_t max_queue_size);
+        ~TCPDataDispatcher();
+        TCPDataDispatcher(const TCPDataDispatcher&) = delete;
+        TCPDataDispatcher& operator=(const TCPDataDispatcher&) = delete;
+
+        void start(int port, const std::string& address);
+        void write(const std::vector<uint8_t>& data);
+
+    private:
+        void process(void);
+
+        size_t m_max_queue_size;
+
+        std::atomic<bool> m_running;
+        std::thread m_listener_thread;
+        TcpSocket m_listener_socket;
+        std::list<TCPConnection> m_connections;
+};
+
 #endif // _TCPSOCKET
-- 
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