From 03967733d70220e2de7af3cdad320aec5c82ede1 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Tue, 25 Jun 2019 10:50:23 +0200
Subject: Add more EDI input improvements

---
 lib/Socket.cpp | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 89 insertions(+), 8 deletions(-)

(limited to 'lib/Socket.cpp')

diff --git a/lib/Socket.cpp b/lib/Socket.cpp
index 9b404eb..cd70a8e 100644
--- a/lib/Socket.cpp
+++ b/lib/Socket.cpp
@@ -274,6 +274,8 @@ void UDPSocket::setMulticastTTL(int ttl)
     }
 }
 
+UDPReceiver::UDPReceiver() { }
+
 UDPReceiver::~UDPReceiver() {
     m_stop = true;
     m_sock.close();
@@ -355,7 +357,7 @@ TCPSocket::~TCPSocket()
 
 TCPSocket::TCPSocket(TCPSocket&& other) :
     m_sock(other.m_sock),
-    m_remote_address(other.m_remote_address)
+    m_remote_address(move(other.m_remote_address))
 {
     if (other.m_sock != -1) {
         other.m_sock = -1;
@@ -364,9 +366,9 @@ TCPSocket::TCPSocket(TCPSocket&& other) :
 
 TCPSocket& TCPSocket::operator=(TCPSocket&& other)
 {
-    m_sock = other.m_sock;
-    m_remote_address = other.m_remote_address;
+    swap(m_remote_address, other.m_remote_address);
 
+    m_sock = other.m_sock;
     if (other.m_sock != -1) {
         other.m_sock = -1;
     }
@@ -487,14 +489,21 @@ void TCPSocket::listen(int port, const string& name)
 
     freeaddrinfo(result);
 
+    if (m_sock != INVALID_SOCKET) {
 #if defined(HAVE_SO_NOSIGPIPE)
-    int val = 1;
-    if (setsockopt(m_sock, SOL_SOCKET, SO_NOSIGPIPE,
-                &val, sizeof(val)) < 0) {
-        throw std::runtime_error("Can't set SO_NOSIGPIPE");
-    }
+        int val = 1;
+        if (setsockopt(m_sock, SOL_SOCKET, SO_NOSIGPIPE,
+                    &val, sizeof(val)) < 0) {
+            throw std::runtime_error("Can't set SO_NOSIGPIPE");
+        }
 #endif
 
+        int ret = ::listen(m_sock, 0);
+        if (ret == -1) {
+            throw std::runtime_error(string("Could not listen: ") + strerror(errno));
+        }
+    }
+
     if (rp == nullptr) {
         throw runtime_error("Could not bind");
     }
@@ -814,4 +823,76 @@ void TCPDataDispatcher::process()
     }
 }
 
+TCPReceiveServer::TCPReceiveServer(size_t blocksize) :
+    m_blocksize(blocksize)
+{
+}
+
+void TCPReceiveServer::start(int listen_port, const std::string& address)
+{
+    m_listener_socket.listen(listen_port, address);
+
+    m_running = true;
+    m_listener_thread = std::thread(&TCPReceiveServer::process, this);
+}
+
+TCPReceiveServer::~TCPReceiveServer()
+{
+    m_running = false;
+    if (m_listener_thread.joinable()) {
+        m_listener_thread.join();
+    }
+}
+
+vector<uint8_t> TCPReceiveServer::receive()
+{
+    vector<uint8_t> buffer;
+    m_queue.try_pop(buffer);
+
+    // we can ignore try_pop()'s return value, because
+    // if it is unsuccessful the buffer is not touched.
+    return buffer;
+}
+
+void TCPReceiveServer::process()
+{
+    constexpr int timeout_ms = 1000;
+    constexpr int disconnect_timeout_ms = 10000;
+    constexpr int max_num_timeouts = disconnect_timeout_ms / timeout_ms;
+
+    while (m_running) {
+        auto sock = m_listener_socket.accept(timeout_ms);
+
+        int num_timeouts = 0;
+
+        while (m_running and sock.valid()) {
+            try {
+                vector<uint8_t> buf(m_blocksize);
+                ssize_t r = sock.recv(buf.data(), buf.size(), 0, timeout_ms);
+                if (r < 0) {
+                    throw logic_error("Invalid recv return value");
+                }
+                else if (r == 0) {
+                    sock.close();
+                    break;
+                }
+                else {
+                    buf.resize(r);
+                    m_queue.push(move(buf));
+                }
+            }
+            catch (const TCPSocket::Interrupted&) {
+                break;
+            }
+            catch (const TCPSocket::Timeout&) {
+                num_timeouts++;
+            }
+
+            if (num_timeouts > max_num_timeouts) {
+                sock.close();
+            }
+        }
+    }
+}
+
 }
-- 
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