Add connection retry

 - Introduce connection retry config for listen and connect endpoints.
 - Listener initialisation reworked to add the connection retry.
 - Connection initialization reworked to be consistent with listening where it posible
 - Some configuration refactoring (ModeDependent related code moved to separate file)

DEFAULT_CONFIG.json5

@@ -22,9 +22,31 @@
   /// For TCP/UDP on Linux, it is possible additionally specify the interface to be connected to: 
   /// E.g. tcp/192.168.0.1:7447#iface=eth0, for connect only if the IP address is reachable via the interface eth0 
   connect: {
+    /// timeout waiting for all endpoints connected (0: no retry, -1: infinite timeout)
+    /// Accepts a single value or different values for router, peer and client.
+    timeout_ms: { router: -1, peer: -1, client: 0 },
+
     endpoints: [
       // "<proto>/<address>"
     ],
+
+    /// Global connect configuration, 
+    /// Accepts a single value or different values for router, peer and client.
+    /// The configuration can also be specified for the separate endpoint
+    /// it will override the global one
+    /// E.g. tcp/192.168.0.1:7447#retry_period_init_ms=20000;retry_period_max_ms=10000"
+
+    /// exit from application, if timeout exceed
+    exit_on_failure: { router: false, peer: false, client: true },
+    /// connect establishing retry configuration 
+    retry: { 
+      /// intial wait timeout until next connect try
+      period_init_ms: 1000,
+      /// maximum wait timeout until next connect try
+      period_max_ms: 4000,
+      /// increase factor for the next timeout until nexti connect try
+      period_increase_factor: 2,
+    },
   },
 
   /// Which endpoints to listen on. E.g. tcp/localhost:7447.
@@ -33,9 +55,31 @@
   /// For TCP/UDP on Linux, it is possible additionally specify the interface to be listened to: 
   /// E.g. tcp/0.0.0.0:7447#iface=eth0, for listen connection only on eth0
   listen: {
+    /// timeout waiting for all listen endpoints (0: no retry, -1: infinite timeout)
+    /// Accepts a single value or different values for router, peer and client.
+    timeout_ms: 0,
+
     endpoints: [
       // "<proto>/<address>"
     ],
+
+    /// Global listen configuration, 
+    /// Accepts a single value or different values for router, peer and client.
+    /// The configuration can also be specified for the separate endpoint
+    /// it will override the global one
+    /// E.g. tcp/192.168.0.1:7447#exit_on_failure=false;retry_period_max_ms=1000"
+
+    /// exit from application, if timeout exceed
+    exit_on_failure: true,
+    /// listen retry configuration 
+    retry: { 
+      /// intial wait timeout until next try
+      period_init_ms: 1000,
+      /// maximum wait timeout until next try
+      period_max_ms: 4000,
+      /// increase factor for the next timeout until next try
+      period_increase_factor: 2,
+    },
   },
   /// Configure the scouting mechanisms and their behaviours
   scouting: {

commons/zenoh-config/Cargo.toml

@@ -24,6 +24,7 @@ categories = { workspace = true }
 description = "Internal crate for zenoh."
 
 [dependencies]
+log = { workspace = true }
 flume = { workspace = true }
 json5 = { workspace = true }
 num_cpus = { workspace = true }