feat!: update coap dependency, fix example

example/coaps_readproperty.dart

@@ -29,8 +29,11 @@ PskCredentials? _pskCredentialsCallback(
 }
 
 Future<void> main(List<String> args) async {
-  final CoapClientFactory coapClientFactory =
-      CoapClientFactory(CoapConfig(useTinyDtls: true));
+  final CoapClientFactory coapClientFactory = CoapClientFactory(
+    CoapConfig(
+      dtlsCiphers: 'PSK-AES128-CCM8',
+    ),
+  );
   final securityProvider =
       ClientSecurityProvider(pskCredentialsCallback: _pskCredentialsCallback);
   final servient = Servient(clientSecurityProvider: securityProvider)

lib/src/binding_coap/coap_client.dart

@@ -5,6 +5,7 @@
 // SPDX-License-Identifier: BSD-3-Clause
 
 import 'dart:async';
+import 'dart:typed_data';
 
 import 'package:coap/coap.dart' as coap;
 import 'package:coap/config/coap_config_default.dart';
@@ -26,35 +27,28 @@ import 'coap_extensions.dart';
 import 'coap_subscription.dart';
 
 class _InternalCoapConfig extends CoapConfigDefault {
-  _InternalCoapConfig(CoapConfig coapConfig, this._form)
+  _InternalCoapConfig(CoapConfig coapConfig)
       : preferredBlockSize =
-            coapConfig.blocksize ?? coap.CoapConstants.preferredBlockSize {
-    if (!_dtlsNeeded) {
-      return;
-    }
-
-    final form = _form;
-
-    if (form == null) {
-      return;
-    }
+            coapConfig.blocksize ?? coap.CoapConstants.preferredBlockSize,
+        dtlsCiphers = coapConfig.dtlsCiphers,
+        dtlsVerify = coapConfig.dtlsVerify,
+        dtlsWithTrustedRoots = coapConfig.dtlsWithTrustedRoots,
+        rootCertificates = coapConfig.rootCertificates;
 
-    if (form.usesPskScheme && coapConfig.useTinyDtls) {
-      dtlsBackend = coap.DtlsBackend.TinyDtls;
-    } else if (coapConfig.useOpenSsl) {
-      dtlsBackend = coap.DtlsBackend.OpenSsl;
-    }
-  }
+  @override
+  final int preferredBlockSize;
 
   @override
-  int preferredBlockSize;
+  final String? dtlsCiphers;
 
   @override
-  coap.DtlsBackend? dtlsBackend;
+  final bool dtlsVerify;
 
-  final Form? _form;
+  @override
+  final bool dtlsWithTrustedRoots;
 
-  bool get _dtlsNeeded => _form?.resolvedHref.scheme == 'coaps';
+  @override
+  final List<Uint8List> rootCertificates;
 }
 
 coap.PskCredentialsCallback? _createPskCallback(
@@ -165,7 +159,7 @@ class CoapClient extends ProtocolClient {
   }) async {
     final coapClient = coap.CoapClient(
       uri,
-      config: _InternalCoapConfig(_coapConfig ?? CoapConfig(), form),
+      config: _InternalCoapConfig(_coapConfig ?? CoapConfig()),
       pskCredentialsCallback:
           _createPskCallback(uri, form, _clientSecurityProvider),
     );
@@ -248,7 +242,7 @@ class CoapClient extends ProtocolClient {
 
     final coapClient = coap.CoapClient(
       creationHintUri,
-      config: _InternalCoapConfig(_coapConfig ?? CoapConfig(), form),
+      config: _InternalCoapConfig(_coapConfig ?? CoapConfig()),
     );
 
     final response = await coapClient.send(request);
@@ -322,7 +316,6 @@ class CoapClient extends ProtocolClient {
 
     final client = coap.CoapClient(
       request.uri.replace(scheme: 'coaps'),
-      config: coap.CoapConfigTinydtls(),
       pskCredentialsCallback: (identityHint) => pskCredentials,
     );
 
@@ -434,7 +427,7 @@ class CoapClient extends ProtocolClient {
 
     final coapClient = coap.CoapClient(
       form.resolvedHref,
-      config: _InternalCoapConfig(_coapConfig ?? CoapConfig(), form),
+      config: _InternalCoapConfig(_coapConfig ?? CoapConfig()),
     );
 
     if (subprotocol == CoapSubprotocol.observe) {

lib/src/binding_coap/coap_config.dart

@@ -4,19 +4,35 @@
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
+import 'dart:typed_data';
+
 /// Allows for configuring the behavior of CoAP clients and servers.
 class CoapConfig {
   /// Creates a new [CoapConfig] object.
   CoapConfig({
     this.port = 5683,
     this.securePort = 5684,
     this.blocksize,
-    this.useTinyDtls = false,
-    this.useOpenSsl = false,
     this.allowMulticastDiscovery = false,
     this.multicastDiscoveryTimeout = const Duration(minutes: 60),
+    this.dtlsCiphers,
+    this.rootCertificates = const [],
+    this.dtlsWithTrustedRoots = true,
+    this.dtlsVerify = true,
   });
 
+  /// Whether certificates should be verified by OpenSSL.
+  final bool dtlsVerify;
+
+  /// Whether OpenSSL should be used with trusted Root Certificates.
+  final bool dtlsWithTrustedRoots;
+
+  /// Can be used to specify the Ciphers that should be used by OpenSSL.
+  final String? dtlsCiphers;
+
+  /// List of custom root certificates to use with OpenSSL.
+  final List<Uint8List> rootCertificates;
+
   /// The port number used by a client or server. Defaults to 5683.
   final int port;
 
@@ -26,12 +42,6 @@ class CoapConfig {
   /// The preferred block size for blockwise transfer.
   final int? blocksize;
 
-  /// Indicates if tinydtls is available as a DTLS backend.
-  final bool useTinyDtls;
-
-  /// Indicates if openSSL is available as a DTLS backend.
-  final bool useOpenSsl;
-
   /// Indicates if multicast should be available for discovery.
   ///
   /// Defaults to false for security reasons, as multicast can lead to

lib/src/binding_coap/coap_extensions.dart

@@ -190,14 +190,7 @@ extension OperationTypeExtension on OperationType {
 
 /// Extension for easily extracting the [content] from a [CoapResponse].
 extension ResponseExtension on CoapResponse {
-  Stream<List<int>> get _payloadStream {
-    final payload = this.payload;
-    if (payload != null) {
-      return Stream.value(payload);
-    } else {
-      return const Stream.empty();
-    }
-  }
+  Stream<List<int>> get _payloadStream => Stream.value(payload);
 
   String get _contentType =>
       contentFormat?.contentType.toString() ?? 'application/json';
@@ -238,8 +231,7 @@ extension ResponseExtension on CoapResponse {
 
     final responsePayload = payload;
 
-    if (responsePayload != null &&
-        contentFormat == CoapMediaType.applicationAceCbor &&
+    if (contentFormat == CoapMediaType.applicationAceCbor &&
         unauthorizedAceCodes.contains(contentFormat)) {
       return AuthServerRequestCreationHint.fromSerialized(
         responsePayload.toList(),

pubspec.yaml

@@ -7,7 +7,7 @@ environment:
   sdk: '>=2.17.0 <3.0.0'
 
 dev_dependencies:
-  build_runner: ^2.1.7
+  build_runner: ^2.3.0
   coverage: ^1.0.4
   dart_code_metrics: ^5.4.0
   lint: ^2.0.1
@@ -17,7 +17,7 @@ dev_dependencies:
 
 dependencies:
   cbor: ^5.1.2
-  coap: ^7.0.0
+  coap: ^8.0.0
   collection: ^1.16.0
   curie: ^0.1.0
   dcaf: ^0.1.0