From 3dc74c15f76e999768643ed4381196292d5376bc Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 6 May 2019 17:22:58 +0200
Subject: EDI: Implement TCP output

---
 src/dabOutput/edi/Config.h      |  6 ++++++
 src/dabOutput/edi/Transport.cpp | 20 +++++++++++++++++++-
 src/dabOutput/edi/Transport.h   |  1 +
 3 files changed, 26 insertions(+), 1 deletion(-)

(limited to 'src/dabOutput')

diff --git a/src/dabOutput/edi/Config.h b/src/dabOutput/edi/Config.h
index d3678d9..55d5f0f 100644
--- a/src/dabOutput/edi/Config.h
+++ b/src/dabOutput/edi/Config.h
@@ -49,6 +49,12 @@ struct udp_destination_t : public destination_t {
     unsigned int ttl = 10;
 };
 
+// TCP server that can accept multiple connections
+struct tcp_destination_t : public destination_t {
+    unsigned int listen_port = 0;
+    size_t max_frames_queued = 1024;
+};
+
 struct configuration_t {
     unsigned chunk_len = 207;        // RSk, data length of each chunk
     unsigned fec       = 0;          // number of fragments that can be recovered
diff --git a/src/dabOutput/edi/Transport.cpp b/src/dabOutput/edi/Transport.cpp
index d433239..d99e987 100644
--- a/src/dabOutput/edi/Transport.cpp
+++ b/src/dabOutput/edi/Transport.cpp
@@ -38,13 +38,17 @@ void configuration_t::print() const
     etiLog.level(info) << " verbose     " << verbose;
     for (auto edi_dest : destinations) {
         if (auto udp_dest = dynamic_pointer_cast<edi::udp_destination_t>(edi_dest)) {
-            etiLog.level(info) << " to " << udp_dest->dest_addr << ":" << dest_port;
+            etiLog.level(info) << " UDP to " << udp_dest->dest_addr << ":" << dest_port;
             if (not udp_dest->source_addr.empty()) {
                 etiLog.level(info) << "  source      " << udp_dest->source_addr;
                 etiLog.level(info) << "  ttl         " << udp_dest->ttl;
             }
             etiLog.level(info) << "  source port " << udp_dest->source_port;
         }
+        else if (auto tcp_dest = dynamic_pointer_cast<edi::tcp_destination_t>(edi_dest)) {
+            etiLog.level(info) << " TCP listening on port " << tcp_dest->listen_port;
+            etiLog.level(info) << "  max frames queued    " << tcp_dest->max_frames_queued;
+        }
         else {
             throw std::logic_error("EDI destination not implemented");
         }
@@ -80,6 +84,14 @@ Sender::Sender(const configuration_t& conf) :
 
             udp_sockets.emplace(udp_dest.get(), udp_socket);
         }
+        else if (auto tcp_dest = dynamic_pointer_cast<edi::tcp_destination_t>(edi_dest)) {
+            auto dispatcher = make_shared<TCPDataDispatcher>(tcp_dest->max_frames_queued);
+            dispatcher->start(tcp_dest->listen_port, "0.0.0.0");
+            tcp_dispatchers.emplace(tcp_dest.get(), dispatcher);
+        }
+        else {
+            throw std::logic_error("EDI destination not implemented");
+        }
     }
 
     if (m_conf.interleaver_enabled()) {
@@ -123,6 +135,9 @@ void Sender::write(const TagPacket& tagpacket)
 
                     udp_sockets.at(udp_dest.get())->send(edi_frag, addr);
                 }
+                else if (auto tcp_dest = dynamic_pointer_cast<edi::tcp_destination_t>(dest)) {
+                    tcp_dispatchers.at(tcp_dest.get())->write(edi_frag);
+                }
                 else {
                     throw std::logic_error("EDI destination not implemented");
                 }
@@ -149,6 +164,9 @@ void Sender::write(const TagPacket& tagpacket)
 
                 udp_sockets.at(udp_dest.get())->send(af_packet, addr);
             }
+            else if (auto tcp_dest = dynamic_pointer_cast<edi::tcp_destination_t>(dest)) {
+                tcp_dispatchers.at(tcp_dest.get())->write(af_packet);
+            }
             else {
                 throw std::logic_error("EDI destination not implemented");
             }
diff --git a/src/dabOutput/edi/Transport.h b/src/dabOutput/edi/Transport.h
index 3c48c96..7b0a0db 100644
--- a/src/dabOutput/edi/Transport.h
+++ b/src/dabOutput/edi/Transport.h
@@ -62,6 +62,7 @@ class Sender {
         edi::Interleaver edi_interleaver;
 
         std::unordered_map<udp_destination_t*, std::shared_ptr<UdpSocket>> udp_sockets;
+        std::unordered_map<tcp_destination_t*, std::shared_ptr<TCPDataDispatcher>> tcp_dispatchers;
 };
 
 }
-- 
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