Implement zmq2edi and zmq2farsync ZMQ socket reset after 10s timeout

1 files changed, 64 insertions, 51 deletions

diff --git a/src/zmq2farsync/zmq2farsync.cpp b/src/zmq2farsync/zmq2farsync.cpp
index 16830a2..95dc074 100644
--- a/src/zmq2farsync/zmq2farsync.cpp
+++ b/src/zmq2farsync/zmq2farsync.cpp
@@ -3,7 +3,7 @@
    2011, 2012 Her Majesty the Queen in Right of Canada (Communications
    Research Center Canada)
 
-   Copyright (C) 2018
+   Copyright (C) 2019
    Matthias P. Braendli, matthias.braendli@mpb.li
 
     http://www.opendigitalradio.org
@@ -28,13 +28,16 @@
 #include "dabOutput/dabOutput.h"
 #include "Log.h"
 #include "zmq.hpp"
+#include <chrono>
 #include <iostream>
+#include <thread>
 #include <vector>
 
 constexpr size_t MAX_ERROR_COUNT = 10;
+constexpr size_t MAX_NUM_RESETS = 180;
 constexpr long ZMQ_TIMEOUT_MS = 1000;
 
-void usage(void)
+static void usage()
 {
     using namespace std;
 
@@ -46,8 +49,9 @@ void usage(void)
     cerr << " <destination> is the device information for the FarSync card." << endl << endl;
     cerr << " The syntax is the same as for ODR-DabMux" << endl << endl;
 
-    cerr << "odr-zmq2edi will quit if it does not receive data for " <<
+    cerr << "The input socket will be reset if no data is received for " <<
         (int)(MAX_ERROR_COUNT * ZMQ_TIMEOUT_MS / 1000.0) << " seconds." << endl;
+    cerr << "After " << MAX_NUM_RESETS << " consecutive resets, the process will quit." << endl;
     cerr << "It is best practice to run this tool under a process supervisor that will restart it automatically." << endl;
 }
 
@@ -80,72 +84,81 @@ int main(int argc, char **argv)
 
     etiLog.level(info) << "Opening ZMQ input: " << source_url;
     zmq::context_t zmq_ctx(1);
-    zmq::socket_t zmq_sock(zmq_ctx, ZMQ_SUB);
-
-    zmq_sock.connect(source_url);
-    zmq_sock.setsockopt(ZMQ_SUBSCRIBE, NULL, 0); // subscribe to all messages
-
-    etiLog.level(info) << "Entering main loop";
     size_t frame_count = 0;
     size_t loop_counter = 0;
-    size_t error_count = 0;
-    while (error_count < MAX_ERROR_COUNT)
-    {
-        zmq::message_t incoming;
-        zmq::pollitem_t items[1];
-        items[0].socket = zmq_sock;
-        items[0].events = ZMQ_POLLIN;
-        const int num_events = zmq::poll(items, 1, ZMQ_TIMEOUT_MS);
-        if (num_events == 0) { // timeout
-            error_count++;
-        }
-        else {
-            // Event received: recv will not block
-            zmq_sock.recv(&incoming);
-            zmq_dab_message_t* dab_msg = (zmq_dab_message_t*)incoming.data();
-
-            if (dab_msg->version != 1) {
-                etiLog.level(error) << "ZeroMQ wrong packet version " << dab_msg->version;
+    size_t num_consecutive_resets = 0;
+    while (num_consecutive_resets < MAX_NUM_RESETS) {
+        zmq::socket_t zmq_sock(zmq_ctx, ZMQ_SUB);
+        zmq_sock.connect(source_url);
+        zmq_sock.setsockopt(ZMQ_SUBSCRIBE, NULL, 0); // subscribe to all messages
+
+        size_t error_count = 0;
+        while (error_count < MAX_ERROR_COUNT) {
+            zmq::message_t incoming;
+            zmq::pollitem_t items[1];
+            items[0].socket = zmq_sock;
+            items[0].events = ZMQ_POLLIN;
+            const int num_events = zmq::poll(items, 1, ZMQ_TIMEOUT_MS);
+            if (num_events == 0) { // timeout
                 error_count++;
             }
+            else {
+                num_consecutive_resets = 0;
 
-            int offset = sizeof(dab_msg->version) +
-                NUM_FRAMES_PER_ZMQ_MESSAGE * sizeof(*dab_msg->buflen);
+                // Event received: recv will not block
+                zmq_sock.recv(&incoming);
+                zmq_dab_message_t* dab_msg = (zmq_dab_message_t*)incoming.data();
 
-            for (int i = 0; i < NUM_FRAMES_PER_ZMQ_MESSAGE; i++) {
-                if (dab_msg->buflen[i] <= 0 or dab_msg->buflen[i] > 6144) {
-                    etiLog.level(error) << "ZeroMQ buffer " << i << " has invalid length " <<
-                        dab_msg->buflen[i];
+                if (dab_msg->version != 1) {
+                    etiLog.level(error) << "ZeroMQ wrong packet version " << dab_msg->version;
                     error_count++;
                 }
-                else {
-                    std::vector<uint8_t> buf(6144, 0x55);
 
-                    const int framesize = dab_msg->buflen[i];
+                int offset = sizeof(dab_msg->version) +
+                    NUM_FRAMES_PER_ZMQ_MESSAGE * sizeof(*dab_msg->buflen);
 
-                    memcpy(&buf.front(),
-                            ((uint8_t*)incoming.data()) + offset,
-                            framesize);
-
-                    offset += framesize;
-
-                    if (output.Write(&buf.front(), buf.size()) == -1) {
-                        etiLog.level(error) << "Cannot write to output!";
+                for (int i = 0; i < NUM_FRAMES_PER_ZMQ_MESSAGE; i++) {
+                    if (dab_msg->buflen[i] <= 0 or dab_msg->buflen[i] > 6144) {
+                        etiLog.level(error) << "ZeroMQ buffer " << i << " has invalid length " <<
+                            dab_msg->buflen[i];
                         error_count++;
                     }
+                    else {
+                        std::vector<uint8_t> buf(6144, 0x55);
+
+                        const int framesize = dab_msg->buflen[i];
+
+                        memcpy(&buf.front(),
+                                ((uint8_t*)incoming.data()) + offset,
+                                framesize);
 
-                    frame_count++;
+                        offset += framesize;
+
+                        if (output.Write(&buf.front(), buf.size()) == -1) {
+                            etiLog.level(error) << "Cannot write to output!";
+                            error_count++;
+                        }
+
+                        frame_count++;
+                    }
                 }
-            }
 
-            loop_counter++;
-            if (loop_counter > 250) {
-                etiLog.level(info) << "Transmitted " << frame_count << " ETI frames";
-                loop_counter = 0;
+                loop_counter++;
+                if (loop_counter > 250) {
+                    etiLog.level(info) << "Transmitted " << frame_count << " ETI frames";
+                    loop_counter = 0;
+                }
             }
         }
+
+        num_consecutive_resets++;
+
+        zmq_sock.close();
+        std::this_thread::sleep_for(std::chrono::seconds(1));
+        etiLog.level(info) << "ZMQ input (" << source_url << ") timeout after " <<
+            num_consecutive_resets << " consecutive resets.";
     }
 
-    return error_count > 0 ? 2 : 0;
+    return 0;
 }