bind stream server to configurable interface

server/control_server.cpp

@@ -140,15 +140,35 @@ void ControlServer::start()
     if (tcp_settings_.enabled)
     {
         for (const auto& address : tcp_settings_.bind_to_address)
+        {
+            try
+            {
+                LOG(INFO) << "Creating TCP acceptor for address: " << address << ", port: " << tcp_settings_.port << "\n";
                 acceptor_tcp_.emplace_back(
                     make_unique<tcp::acceptor>(*io_context_, tcp::endpoint(boost::asio::ip::address::from_string(address), tcp_settings_.port)));
             }
+            catch (const boost::system::system_error& e)
+            {
+                LOG(ERROR) << "error creating TCP acceptor: " << e.what() << ", code: " << e.code() << "\n";
+            }
+        }
+    }
     if (http_settings_.enabled)
     {
         for (const auto& address : http_settings_.bind_to_address)
+        {
+            try
+            {
+                LOG(INFO) << "Creating HTTP acceptor for address: " << address << ", port: " << http_settings_.port << "\n";
                 acceptor_http_.emplace_back(
                     make_unique<tcp::acceptor>(*io_context_, tcp::endpoint(boost::asio::ip::address::from_string(address), http_settings_.port)));
             }
+            catch (const boost::system::system_error& e)
+            {
+                LOG(ERROR) << "error creating HTTP acceptor: " << e.what() << ", code: " << e.code() << "\n";
+            }
+        }
+    }
 
     startAccept();
 }
@@ -162,6 +182,9 @@ void ControlServer::stop()
     for (auto& acceptor : acceptor_http_)
         acceptor->cancel();
 
+    acceptor_tcp_.clear();
+    acceptor_http_.clear();
+
     std::lock_guard<std::recursive_mutex> mlock(session_mutex_);
     cleanup();
     for (auto s : sessions_)

server/server_settings.hpp

@@ -48,6 +48,7 @@ struct ServerSettings
         std::string sampleFormat{"48000:16:2"};
         size_t streamReadMs{20};
         bool sendAudioToMutedClients{false};
+        std::vector<std::string> bind_to_address{{"0.0.0.0"}};
     };
 
     struct LoggingSettings

server/snapserver.conf

@@ -21,7 +21,11 @@
 # enable HTTP Json RPC (HTTP POST and websockets)
 #enabled = true
 
-# address to listen on
+# address to listen on, can be specified multiple times
+# use "0.0.0.0" to bind to any IPv4 address or :: to bind to any IPv6 address
+# or "127.0.0.1" or "::1" to bind to localhost IPv4 or IPv6, respectively
+# use the address of a specific network interface to just listen to and accept
+# connections from that interface
 #bind_to_address = 0.0.0.0
 
 # which port the server should listen to
@@ -39,7 +43,11 @@ doc_root = /home/johannes/Develop/snapcast/control
 # enable TCP Json RPC
 #enabled = true
 
-# address to listen on
+# address to listen on, can be specified multiple times
+# use "0.0.0.0" to bind to any IPv4 address or :: to bind to any IPv6 address
+# or "127.0.0.1" or "::1" to bind to localhost IPv4 or IPv6, respectively
+# use the address of a specific network interface to just listen to and accept
+# connections from that interface
 #bind_to_address = 0.0.0.0
 
 # which port the server should listen to
@@ -51,8 +59,11 @@ doc_root = /home/johannes/Develop/snapcast/control
 # Stream settings #############################################################
 #
 [stream]
-# address to listen on
+# address to listen on, can be specified multiple times
-# TODO: not implemented yet
+# use "0.0.0.0" to bind to any IPv4 address or :: to bind to any IPv6 address
+# or "127.0.0.1" or "::1" to bind to localhost IPv4 or IPv6, respectively
+# use the address of a specific network interface to just listen to and accept
+# connections from that interface
 #bind_to_address = 0.0.0.0
 
 # which port the server should listen to

server/snapserver.cpp

@@ -91,6 +91,8 @@ int main(int argc, char* argv[])
         conf.add<Value<int>>("b", "stream.buffer", "Buffer [ms]", settings.stream.bufferMs, &settings.stream.bufferMs);
         conf.add<Value<bool>>("", "stream.send_to_muted", "Send audio to muted clients", settings.stream.sendAudioToMutedClients,
                               &settings.stream.sendAudioToMutedClients);
+        auto stream_bind_to_address = conf.add<Value<string>>("", "stream.bind_to_address", "address for the server to listen on",
+                                                              settings.stream.bind_to_address.front(), &settings.stream.bind_to_address[0]);
 
         // HTTP RPC settings
         conf.add<Value<bool>>("", "http.enabled", "enable HTTP Json RPC (HTTP POST and websockets)", settings.http.enabled, &settings.http.enabled);
@@ -123,6 +125,12 @@ int main(int argc, char* argv[])
                 for (size_t n = 0; n < http_bind_to_address->count(); ++n)
                     settings.http.bind_to_address.push_back(http_bind_to_address->value(n));
             }
+            if (stream_bind_to_address->is_set())
+            {
+                settings.stream.bind_to_address.clear();
+                for (size_t n = 0; n < stream_bind_to_address->count(); ++n)
+                    settings.stream.bind_to_address.push_back(stream_bind_to_address->value(n));
+            }
         }
         catch (const std::invalid_argument& e)
         {

server/stream_server.cpp

@@ -29,8 +29,7 @@ using namespace std;
 using json = nlohmann::json;
 
 
-StreamServer::StreamServer(boost::asio::io_context* io_context, const ServerSettings& serverSettings)
+StreamServer::StreamServer(boost::asio::io_context* io_context, const ServerSettings& serverSettings) : io_context_(io_context), settings_(serverSettings)
-    : io_context_(io_context), acceptor_v4_(nullptr), acceptor_v6_(nullptr), settings_(serverSettings)
 {
 }
 
@@ -771,14 +770,8 @@ void StreamServer::startAccept()
             LOG(ERROR) << "Error while accepting socket connection: " << ec.message() << "\n";
     };
 
-    if (acceptor_v4_)
+    for (auto& acceptor : acceptor_)
-    {
+        acceptor->async_accept(accept_handler);
-        acceptor_v4_->async_accept(accept_handler);
-    }
-    if (acceptor_v6_)
-    {
-        acceptor_v6_->async_accept(accept_handler);
-    }
 }
 
 
@@ -829,29 +822,13 @@ void StreamServer::start()
         }
         streamManager_->start();
 
-        bool is_v6_only(true);
+        for (const auto& address : settings_.stream.bind_to_address)
-        tcp::endpoint endpoint_v6(tcp::v6(), settings_.stream.port);
+        {
             try
             {
-            acceptor_v6_ = make_shared<tcp::acceptor>(*io_context_, endpoint_v6);
+                LOG(INFO) << "Creating stream acceptor for address: " << address << ", port: " << settings_.stream.port << "\n";
-            boost::system::error_code ec;
+                acceptor_.emplace_back(
-            acceptor_v6_->set_option(boost::asio::ip::v6_only(false), ec);
+                    make_unique<tcp::acceptor>(*io_context_, tcp::endpoint(boost::asio::ip::address::from_string(address), settings_.stream.port)));
-            boost::asio::ip::v6_only option;
-            acceptor_v6_->get_option(option);
-            is_v6_only = option.value();
-            LOG(DEBUG) << "IPv6 only: " << is_v6_only << "\n";
-        }
-        catch (const boost::system::system_error& e)
-        {
-            LOG(ERROR) << "error creating TCP acceptor: " << e.what() << ", code: " << e.code() << "\n";
-        }
-
-        if (!acceptor_v6_ || is_v6_only)
-        {
-            tcp::endpoint endpoint_v4(tcp::v4(), settings_.stream.port);
-            try
-            {
-                acceptor_v4_ = make_shared<tcp::acceptor>(*io_context_, endpoint_v4);
             }
             catch (const boost::system::system_error& e)
             {
@@ -880,13 +857,10 @@ void StreamServer::stop()
 
     {
         std::lock_guard<std::recursive_mutex> mlock(sessionsMutex_);
-        for (auto session : sessions_) // it = sessions_.begin(); it != sessions_.end(); ++it)
+        for (auto session : sessions_)
         {
             if (session)
-            {
                 session->stop();
-                session = nullptr;
-            }
         }
         sessions_.clear();
     }
@@ -897,14 +871,7 @@ void StreamServer::stop()
         controlServer_ = nullptr;
     }
 
-    if (acceptor_v4_)
+    for (auto& acceptor : acceptor_)
-    {
+        acceptor->cancel();
-        acceptor_v4_->cancel();
+    acceptor_.clear();
-        acceptor_v4_ = nullptr;
-    }
-    if (acceptor_v6_)
-    {
-        acceptor_v6_->cancel();
-        acceptor_v6_ = nullptr;
-    }
 }

server/stream_server.hpp

@@ -40,8 +40,9 @@
 
 
 using boost::asio::ip::tcp;
-typedef std::shared_ptr<tcp::socket> socket_ptr;
+using acceptor_ptr = std::unique_ptr<tcp::acceptor>;
-typedef std::shared_ptr<StreamSession> session_ptr;
+using socket_ptr = std::shared_ptr<tcp::socket>;
+using session_ptr = std::shared_ptr<StreamSession>;
 
 
 /// Forwars PCM data to the connected clients
@@ -85,8 +86,7 @@ private:
     mutable std::recursive_mutex sessionsMutex_;
     std::set<session_ptr> sessions_;
     boost::asio::io_context* io_context_;
-    std::shared_ptr<tcp::acceptor> acceptor_v4_;
+    std::vector<acceptor_ptr> acceptor_;
-    std::shared_ptr<tcp::acceptor> acceptor_v6_;
 
     ServerSettings settings_;
     Queue<std::shared_ptr<msg::BaseMessage>> messages_;