feat(protocol): bind tunnel admission to device proof

gen/go/protocol/protocol.go

@@ -8,10 +8,11 @@ import (
 	"fmt"
 	"io"
 	"reflect"
+	"strings"
 	"time"
 )
 
-const SchemaSHA256 = "b8a69785112bb94d45f47c2250ca59d0bde47e3667b8ad89c9b0e2c4cfb25aec"
+const SchemaSHA256 = "6b8631bf2b2aa12b14d0bc4d136af39a632e85b3237dc5614469ba09d93f5fca"
 const ProtocolVersion = "1.0.0"
 const CurrentWireVersion = "1"
 const NMinus1WireVersion = "0"
@@ -326,6 +327,7 @@ type TunnelAdmissionRequest struct {
 	Grant             string            `json:"grant"`
 	ReconnectSequence int64             `json:"reconnect_sequence"`
 	ClientNonce       string            `json:"client_nonce"`
+	DeviceSignature   string            `json:"device_signature"`
 	Capabilities      CapabilityProfile `json:"capabilities"`
 }
 
@@ -3923,6 +3925,15 @@ func (v TunnelAdmissionRequest) Validate() error {
 	if len(v.ClientNonce) > 128 {
 		violations = append(violations, FieldViolation{Field: "client_nonce", Code: "max_length"})
 	}
+	if v.DeviceSignature == "" {
+		violations = append(violations, FieldViolation{Field: "device_signature", Code: "required"})
+	}
+	if len(v.DeviceSignature) < 86 && v.DeviceSignature != "" {
+		violations = append(violations, FieldViolation{Field: "device_signature", Code: "min_length"})
+	}
+	if len(v.DeviceSignature) > 86 {
+		violations = append(violations, FieldViolation{Field: "device_signature", Code: "max_length"})
+	}
 	if reflect.DeepEqual(v.Capabilities, CapabilityProfile{}) {
 		violations = append(violations, FieldViolation{Field: "capabilities", Code: "required"})
 	}
@@ -3953,6 +3964,9 @@ func DecodeTunnelAdmissionRequest(data []byte) (TunnelAdmissionRequest, error) {
 	if raw, ok := fields["client_nonce"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
 		return value, ValidationError{Violations: []FieldViolation{{Field: "client_nonce", Code: "required"}}}
 	}
+	if raw, ok := fields["device_signature"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "device_signature", Code: "required"}}}
+	}
 	if raw, ok := fields["gateway_id"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
 		return value, ValidationError{Violations: []FieldViolation{{Field: "gateway_id", Code: "required"}}}
 	}
@@ -4073,3 +4087,13 @@ func IntersectCapabilityProfiles(profiles ...CapabilityProfile) (CapabilityProfi
 	}
 	return selected, nil
 }
+
+func (v TunnelAdmissionRequest) DeviceAdmissionTranscript() []byte {
+	fields := []string{v.SessionID, v.GatewayID, v.Audience, v.Grant, fmt.Sprintf("%d", v.ReconnectSequence), v.ClientNonce, v.Capabilities.Transport, v.Capabilities.Framing, v.Capabilities.Media, v.Capabilities.Audio, v.Capabilities.SourceRateControl, v.Capabilities.ClientDecode}
+	var transcript strings.Builder
+	transcript.WriteString("versevdi/tunnel-admission/v1")
+	for _, field := range fields {
+		fmt.Fprintf(&transcript, "%d:%s", len(field), field)
+	}
+	return []byte(transcript.String())
+}

gen/manifest.json

@@ -12,7 +12,7 @@
       "2"
     ]
   },
-  "generator_sha256": "88535ecf2b1c926104b10b4ab56f1bc6298e1c3e75490e36ee8581a135bcded7",
+  "generator_sha256": "e9c6ee1541585fcb00dcc5e94a5a6d93dbe3a719a5c545f31e5eda268f2638ab",
   "protocol_version": "1.0.0",
-  "schema_sha256": "b8a69785112bb94d45f47c2250ca59d0bde47e3667b8ad89c9b0e2c4cfb25aec"
+  "schema_sha256": "6b8631bf2b2aa12b14d0bc4d136af39a632e85b3237dc5614469ba09d93f5fca"
 }

gen/rust/protocol.rs

@@ -1,6 +1,6 @@
 // Code generated by tools/generate.py; DO NOT EDIT.
 #![allow(non_snake_case)]
-pub const SCHEMA_SHA256: &str = "b8a69785112bb94d45f47c2250ca59d0bde47e3667b8ad89c9b0e2c4cfb25aec";
+pub const SCHEMA_SHA256: &str = "6b8631bf2b2aa12b14d0bc4d136af39a632e85b3237dc5614469ba09d93f5fca";
 pub const CURRENT_WIRE_VERSION: &str = "1";
 pub const N_MINUS_1_WIRE_VERSION: &str = "0";
 pub const N_MINUS_2_WIRE_VERSION: &str = "-1";
@@ -1345,12 +1345,13 @@ pub struct TunnelAdmissionRequest {
     grant: String,
     reconnectSequence: i64,
     clientNonce: String,
+    deviceSignature: String,
     capabilities: CapabilityProfile,
 }
 
 impl TunnelAdmissionRequest {
-    pub fn new(version: String, sessionId: String, gatewayId: String, audience: String, grant: String, reconnectSequence: i64, clientNonce: String, capabilities: CapabilityProfile) -> Result<Self, ValidationError> {
+    pub fn new(version: String, sessionId: String, gatewayId: String, audience: String, grant: String, reconnectSequence: i64, clientNonce: String, deviceSignature: String, capabilities: CapabilityProfile) -> Result<Self, ValidationError> {
-        let value = Self { version, sessionId, gatewayId, audience, grant, reconnectSequence, clientNonce, capabilities };
+        let value = Self { version, sessionId, gatewayId, audience, grant, reconnectSequence, clientNonce, deviceSignature, capabilities };
         value.validate()?;
         Ok(value)
     }
@@ -1372,6 +1373,9 @@ impl TunnelAdmissionRequest {
         if self.clientNonce.is_empty() { return Err(ValidationError::new("client_nonce", "required")); }
         if !self.clientNonce.is_empty() && self.clientNonce.len() < 16 { return Err(ValidationError::new("client_nonce", "min_length")); }
         if self.clientNonce.len() > 128 { return Err(ValidationError::new("client_nonce", "max_length")); }
+        if self.deviceSignature.is_empty() { return Err(ValidationError::new("device_signature", "required")); }
+        if !self.deviceSignature.is_empty() && self.deviceSignature.len() < 86 { return Err(ValidationError::new("device_signature", "min_length")); }
+        if self.deviceSignature.len() > 86 { return Err(ValidationError::new("device_signature", "max_length")); }
         self.capabilities.validate().map_err(|_| ValidationError::new("capabilities", "invalid_object"))?;
         Ok(())
     }
@@ -1382,7 +1386,15 @@ impl TunnelAdmissionRequest {
     pub fn grant(&self) -> &String { &self.grant }
     pub fn reconnectSequence(&self) -> &i64 { &self.reconnectSequence }
     pub fn clientNonce(&self) -> &String { &self.clientNonce }
+    pub fn deviceSignature(&self) -> &String { &self.deviceSignature }
     pub fn capabilities(&self) -> &CapabilityProfile { &self.capabilities }
+    pub fn device_admission_transcript(&self) -> Vec<u8> {
+        let reconnect_sequence = self.reconnectSequence.to_string();
+        let fields = [&self.sessionId, &self.gatewayId, &self.audience, &self.grant, &reconnect_sequence, &self.clientNonce, &self.capabilities.transport, &self.capabilities.framing, &self.capabilities.media, &self.capabilities.audio, &self.capabilities.sourceRateControl, &self.capabilities.clientDecode];
+        let mut transcript = String::from("versevdi/tunnel-admission/v1");
+        for field in fields { transcript.push_str(&format!("{}:{}", field.as_bytes().len(), field)); }
+        transcript.into_bytes()
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]

gen/swift/Protocol.swift

@@ -1,7 +1,7 @@
 // Code generated by tools/generate.py; DO NOT EDIT.
 import Foundation
 public typealias JSONObject = [String: String]
-public let schemaSHA256 = "b8a69785112bb94d45f47c2250ca59d0bde47e3667b8ad89c9b0e2c4cfb25aec"
+public let schemaSHA256 = "6b8631bf2b2aa12b14d0bc4d136af39a632e85b3237dc5614469ba09d93f5fca"
 public let currentWireVersion = "1"
 public let nMinus1WireVersion = "0"
 public let nMinus2WireVersion = "-1"
@@ -1797,6 +1797,7 @@ public struct TunnelAdmissionRequest: Codable, Equatable {
     public let grant: String
     public let reconnectSequence: Int64
     public let clientNonce: String
+    public let deviceSignature: String
     public let capabilities: CapabilityProfile
     enum CodingKeys: String, CodingKey {
         case version = "version"
@@ -1806,10 +1807,11 @@ public struct TunnelAdmissionRequest: Codable, Equatable {
         case grant = "grant"
         case reconnectSequence = "reconnect_sequence"
         case clientNonce = "client_nonce"
+        case deviceSignature = "device_signature"
         case capabilities = "capabilities"
     }
 
-    public init(version: String, sessionId: String, gatewayId: String, audience: String, grant: String, reconnectSequence: Int64, clientNonce: String, capabilities: CapabilityProfile) throws {
+    public init(version: String, sessionId: String, gatewayId: String, audience: String, grant: String, reconnectSequence: Int64, clientNonce: String, deviceSignature: String, capabilities: CapabilityProfile) throws {
         self.version = version
         self.sessionId = sessionId
         self.gatewayId = gatewayId
@@ -1817,6 +1819,7 @@ public struct TunnelAdmissionRequest: Codable, Equatable {
         self.grant = grant
         self.reconnectSequence = reconnectSequence
         self.clientNonce = clientNonce
+        self.deviceSignature = deviceSignature
         self.capabilities = capabilities
         try validate()
     }
@@ -1825,7 +1828,7 @@ public struct TunnelAdmissionRequest: Codable, Equatable {
         let all = try decoder.container(keyedBy: AnyCodingKey.self)
         for key in all.allKeys where CodingKeys(stringValue: key.stringValue) == nil { throw ContractValidationError(field: key.stringValue, code: "unknown_field") }
         let c = try decoder.container(keyedBy: CodingKeys.self)
-        try self.init(version: try c.decode(String.self, forKey: .version), sessionId: try c.decode(String.self, forKey: .sessionId), gatewayId: try c.decode(String.self, forKey: .gatewayId), audience: try c.decode(String.self, forKey: .audience), grant: try c.decode(String.self, forKey: .grant), reconnectSequence: try c.decode(Int64.self, forKey: .reconnectSequence), clientNonce: try c.decode(String.self, forKey: .clientNonce), capabilities: try c.decode(CapabilityProfile.self, forKey: .capabilities))
+        try self.init(version: try c.decode(String.self, forKey: .version), sessionId: try c.decode(String.self, forKey: .sessionId), gatewayId: try c.decode(String.self, forKey: .gatewayId), audience: try c.decode(String.self, forKey: .audience), grant: try c.decode(String.self, forKey: .grant), reconnectSequence: try c.decode(Int64.self, forKey: .reconnectSequence), clientNonce: try c.decode(String.self, forKey: .clientNonce), deviceSignature: try c.decode(String.self, forKey: .deviceSignature), capabilities: try c.decode(CapabilityProfile.self, forKey: .capabilities))
     }
 
     public func validate() throws {
@@ -1846,6 +1849,9 @@ public struct TunnelAdmissionRequest: Codable, Equatable {
         if self.clientNonce.isEmpty { throw ContractValidationError(field: "client_nonce", code: "required") }
         if !self.clientNonce.isEmpty && self.clientNonce.utf8.count < 16 { throw ContractValidationError(field: "client_nonce", code: "min_length") }
         if self.clientNonce.utf8.count > 128 { throw ContractValidationError(field: "client_nonce", code: "max_length") }
+        if self.deviceSignature.isEmpty { throw ContractValidationError(field: "device_signature", code: "required") }
+        if !self.deviceSignature.isEmpty && self.deviceSignature.utf8.count < 86 { throw ContractValidationError(field: "device_signature", code: "min_length") }
+        if self.deviceSignature.utf8.count > 86 { throw ContractValidationError(field: "device_signature", code: "max_length") }
         try self.capabilities.validate()
     }
 
@@ -1884,6 +1890,15 @@ public struct VersionNegotiation: Codable, Equatable {
     public func encodeJSON() throws -> Data { try validate(); return try JSONEncoder().encode(self) }
 }
 
+public extension TunnelAdmissionRequest {
+    func deviceAdmissionTranscript() -> Data {
+        let fields = [sessionId, gatewayId, audience, grant, String(reconnectSequence), clientNonce, capabilities.transport, capabilities.framing, capabilities.media, capabilities.audio, capabilities.sourceRateControl, capabilities.clientDecode]
+        var transcript = "versevdi/tunnel-admission/v1"
+        for field in fields { transcript += "\(field.utf8.count):\(field)" }
+        return Data(transcript.utf8)
+    }
+}
+
 public extension CapabilityProfile {
     static func intersection(_ profiles: [CapabilityProfile]) throws -> CapabilityProfile {
         guard let selected = profiles.first else { throw ContractValidationError(field: "capabilities", code: "no_overlap") }

proto/versevdi/tunnel/v1/tunnel.proto

@@ -102,6 +102,7 @@ message TunnelAdmissionRequest {
   uint64 reconnect_sequence = 6;
   string client_nonce = 7;
   CapabilityProfile capabilities = 8;
+  string device_signature = 9;
 }
 
 message SessionAuthority {

schemas/control-v1.schema.json

@@ -406,7 +406,7 @@
     "TunnelAdmissionRequest": {
       "type": "object",
       "additionalProperties": false,
-      "required": ["version", "session_id", "gateway_id", "audience", "grant", "reconnect_sequence", "client_nonce", "capabilities"],
+      "required": ["version", "session_id", "gateway_id", "audience", "grant", "reconnect_sequence", "client_nonce", "device_signature", "capabilities"],
       "properties": {
         "version": {"type": "string", "const": "1"},
         "session_id": {"type": "string", "minLength": 1, "maxLength": 128},
@@ -415,6 +415,7 @@
         "grant": {"type": "string", "minLength": 43, "maxLength": 256},
         "reconnect_sequence": {"type": "integer", "minimum": 0},
         "client_nonce": {"type": "string", "minLength": 16, "maxLength": 128},
+        "device_signature": {"type": "string", "minLength": 86, "maxLength": 86},
         "capabilities": {"$ref": "#/$defs/CapabilityProfile"}
       }
     },

tests/go/protocol_test.go

@@ -74,6 +74,35 @@ func TestCapabilityIntersectionRejectsNoOverlap(t *testing.T) {
 	}
 }
 
+func TestTunnelAdmissionRequiresDeviceSignature(t *testing.T) {
+	request := protocol.TunnelAdmissionRequest{
+		Version: "1", SessionID: "session-1", GatewayID: "gateway-1", Audience: "versevdi-gateway",
+		Grant: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_", ReconnectSequence: 0,
+		ClientNonce: "0123456789abcdef", Capabilities: protocol.CapabilityProfile{
+			Transport: "quic-tls13", Framing: "datagram-v1", Media: "encoded", Audio: "encoded",
+			SourceRateControl: "server", ClientDecode: "h264-opus",
+		},
+	}
+	if _, err := protocol.EncodeTunnelAdmissionRequest(request); err == nil {
+		t.Fatal("EncodeTunnelAdmissionRequest accepted an unsigned device admission")
+	}
+}
+
+func TestTunnelAdmissionTranscriptIsDomainSeparatedAndLengthDelimited(t *testing.T) {
+	request := protocol.TunnelAdmissionRequest{
+		Version: "1", SessionID: "session", GatewayID: "gateway", Audience: "audience",
+		Grant: strings.Repeat("g", 43), ReconnectSequence: 0, ClientNonce: strings.Repeat("n", 16),
+		DeviceSignature: strings.Repeat("s", 86), Capabilities: protocol.CapabilityProfile{
+			Transport: "quic-tls13", Framing: "datagram-v1", Media: "encoded", Audio: "encoded",
+			SourceRateControl: "server", ClientDecode: "h264-opus",
+		},
+	}
+	want := "versevdi/tunnel-admission/v17:session7:gateway8:audience43:" + strings.Repeat("g", 43) + "1:016:" + strings.Repeat("n", 16) + "10:quic-tls1311:datagram-v17:encoded7:encoded6:server9:h264-opus"
+	if got := string(request.DeviceAdmissionTranscript()); got != want {
+		t.Fatalf("DeviceAdmissionTranscript() = %q, want %q", got, want)
+	}
+}
+
 func TestSessionAuthorityRejectsProviderRoute(t *testing.T) {
 	valid := `{"version":"1","session_id":"session-1","gateway_id":"gateway-1","audience":"versevdi-gateway","reconnect_sequence":0,"expires_at":"2099-01-01T00:00:00Z","capabilities":{"transport":"quic","framing":"datagram-v1","media":"encoded","audio":"encoded","source_rate_control":"server","client_decode":"h264-opus"},"provider_profile":"apollo","provider_identity":"provider-1"}`
 	if _, err := protocol.DecodeSessionAuthority([]byte(valid)); err != nil {

tools/generate.py

@@ -171,6 +171,7 @@ def generate_go(defs: dict[str, dict[str, Any]], schema_hash: str, version: str,
         "\"errors\"",
         "\"fmt\"",
         "\"reflect\"",
+        "\"strings\"",
         "\"time\"",
         ")",
         "",
@@ -255,6 +256,16 @@ def generate_go(defs: dict[str, dict[str, Any]], schema_hash: str, version: str,
         "}",
         "",
     ])
+    out.extend([
+        "func (v TunnelAdmissionRequest) DeviceAdmissionTranscript() []byte {",
+        "\tfields := []string{v.SessionID, v.GatewayID, v.Audience, v.Grant, fmt.Sprintf(\"%d\", v.ReconnectSequence), v.ClientNonce, v.Capabilities.Transport, v.Capabilities.Framing, v.Capabilities.Media, v.Capabilities.Audio, v.Capabilities.SourceRateControl, v.Capabilities.ClientDecode}",
+        "\tvar transcript strings.Builder",
+        "\ttranscript.WriteString(\"versevdi/tunnel-admission/v1\")",
+        "\tfor _, field := range fields { fmt.Fprintf(&transcript, \"%d:%s\", len(field), field) }",
+        "\treturn []byte(transcript.String())",
+        "}",
+        "",
+    ])
     # Use io.EOF in generated code without making every generated decoder depend on
     # error-string comparison; replace the deliberately compact placeholder.
     text = "\n".join(out).replace('"errors"\n"fmt"', '"errors"\n"fmt"\n\"io"')
@@ -395,6 +406,16 @@ def generate_rust(defs: dict[str, dict[str, Any]], schema_hash: str, compatibili
             if prop_name not in required:
                 typ = f"Option<{typ}>"
             out.append(f"    pub fn {field}(&self) -> &{typ} {{ &self.{field} }}")
+        if name == "TunnelAdmissionRequest":
+            out.extend([
+                "    pub fn device_admission_transcript(&self) -> Vec<u8> {",
+                "        let reconnect_sequence = self.reconnectSequence.to_string();",
+                "        let fields = [&self.sessionId, &self.gatewayId, &self.audience, &self.grant, &reconnect_sequence, &self.clientNonce, &self.capabilities.transport, &self.capabilities.framing, &self.capabilities.media, &self.capabilities.audio, &self.capabilities.sourceRateControl, &self.capabilities.clientDecode];",
+                "        let mut transcript = String::from(\"versevdi/tunnel-admission/v1\");",
+                "        for field in fields { transcript.push_str(&format!(\"{}:{}\", field.as_bytes().len(), field)); }",
+                "        transcript.into_bytes()",
+                "    }",
+            ])
         out.extend(["}", ""])
     out.extend([
         "pub fn intersect_capability_profiles(profiles: &[CapabilityProfile]) -> Result<CapabilityProfile, ValidationError> {",
@@ -517,6 +538,15 @@ def generate_swift(defs: dict[str, dict[str, Any]], schema_hash: str, compatibil
         out.extend(swift_validation(definition))
         out.extend(["    }", "", "    public static func decodeJSON(_ data: Data) throws -> Self { try JSONDecoder().decode(Self.self, from: data) }", "    public func encodeJSON() throws -> Data { try validate(); return try JSONEncoder().encode(self) }", "}", ""])
     out.extend([
+        "public extension TunnelAdmissionRequest {",
+        "    func deviceAdmissionTranscript() -> Data {",
+        "        let fields = [sessionId, gatewayId, audience, grant, String(reconnectSequence), clientNonce, capabilities.transport, capabilities.framing, capabilities.media, capabilities.audio, capabilities.sourceRateControl, capabilities.clientDecode]",
+        "        var transcript = \"versevdi/tunnel-admission/v1\"",
+        "        for field in fields { transcript += \"\\(field.utf8.count):\\(field)\" }",
+        "        return Data(transcript.utf8)",
+        "    }",
+        "}",
+        "",
         "public extension CapabilityProfile {",
         "    static func intersection(_ profiles: [CapabilityProfile]) throws -> CapabilityProfile {",
         "        guard let selected = profiles.first else { throw ContractValidationError(field: \"capabilities\", code: \"no_overlap\") }",

tools/test_generated_contracts.py

@@ -38,9 +38,13 @@ let capability = try CapabilityProfile(
 let request = try TunnelAdmissionRequest(
     version: "1", sessionId: "session", gatewayId: "gateway", audience: "audience",
     grant: String(repeating: "g", count: 43), reconnectSequence: 0,
-    clientNonce: String(repeating: "n", count: 16), capabilities: capability
+    clientNonce: String(repeating: "n", count: 16), deviceSignature: String(repeating: "s", count: 86), capabilities: capability
 )
 _ = request
+let transcript = "versevdi/tunnel-admission/v17:session7:gateway8:audience43:" + String(repeating: "g", count: 43) + "1:016:" + String(repeating: "n", count: 16) + "10:quic-tls1311:datagram-v17:encoded7:encoded6:server9:h264-opus"
+guard String(data: request.deviceAdmissionTranscript(), encoding: .utf8) == transcript else {
+    fatalError("unexpected device admission transcript")
+}
 let incompatible = try CapabilityProfile(
     transport: "quic-tls13", framing: "datagram-v1", media: "encoded",
     audio: "encoded", sourceRateControl: "server", clientDecode: "hevc-opus"
@@ -97,17 +101,25 @@ fn main() {
         "quic-tls13".into(), "datagram-v1".into(), "encoded".into(),
         "encoded".into(), "server".into(), "h264-opus".into(),
     ).unwrap();
+    let request = TunnelAdmissionRequest::new(
+        "1".into(), "session".into(), "gateway".into(), "audience".into(),
+        "g".repeat(43), 0, "n".repeat(16), "s".repeat(86), capabilities.clone(),
+    ).unwrap();
+    let transcript = "versevdi/tunnel-admission/v17:session7:gateway8:audience43:".to_string()
+        + &"g".repeat(43) + "1:016:" + &"n".repeat(16)
+        + "10:quic-tls1311:datagram-v17:encoded7:encoded6:server9:h264-opus";
+    assert_eq!(request.device_admission_transcript(), transcript.into_bytes());
     assert!(TunnelAdmissionRequest::new(
         "2".into(), "session".into(), "gateway".into(), "audience".into(),
-        "g".repeat(43), 0, "n".repeat(16), capabilities.clone(),
+        "g".repeat(43), 0, "n".repeat(16), "s".repeat(86), capabilities.clone(),
     ).is_err());
     assert!(TunnelAdmissionRequest::new(
         "0".into(), "session".into(), "gateway".into(), "audience".into(),
-        "g".repeat(43), 0, "n".repeat(16), capabilities.clone(),
+        "g".repeat(43), 0, "n".repeat(16), "s".repeat(86), capabilities.clone(),
     ).is_err());
     assert!(TunnelAdmissionRequest::new(
         "1".into(), "session".into(), "gateway".into(), "audience".into(),
-        "g".repeat(43), 0, "short".into(), capabilities.clone(),
+        "g".repeat(43), 0, "short".into(), "s".repeat(86), capabilities.clone(),
     ).is_err());
     assert!(intersect_capability_profiles(&[capabilities.clone(), capabilities.clone()]).is_ok());
     let incompatible = CapabilityProfile::new(