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Rewrite SocketController (#634)

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* WIP

* Working

* Working

* Cleanup
This commit is contained in:
Max Goedjen 2025-08-26 23:44:16 -07:00 committed by GitHub
parent 8ad2d60082
commit e8fcb95db0
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
6 changed files with 196 additions and 177 deletions
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27
Sources/Packages/Sources/SecretAgentKit/Agent.swift
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@ -11,7 +11,6 @@ public final class Agent: Sendable {
private let witness: SigningWitness? private let witness: SigningWitness?
private let publicKeyWriter = OpenSSHPublicKeyWriter() private let publicKeyWriter = OpenSSHPublicKeyWriter()
private let signatureWriter = OpenSSHSignatureWriter() private let signatureWriter = OpenSSHSignatureWriter()
private let requestTracer = SigningRequestTracer()
private let certificateHandler = OpenSSHCertificateHandler() private let certificateHandler = OpenSSHCertificateHandler()
private let logger = Logger(subsystem: "com.maxgoedjen.secretive.secretagent", category: "Agent") private let logger = Logger(subsystem: "com.maxgoedjen.secretive.secretagent", category: "Agent")
@ -34,28 +33,26 @@ extension Agent {
/// Handles an incoming request. /// Handles an incoming request.
/// - Parameters: /// - Parameters:
/// - reader: A ``FileHandleReader`` to read the content of the request. /// - data: The data to handle.
/// - writer: A ``FileHandleWriter`` to write the response to. /// - provenance: The origin of the request.
/// - Return value: /// - Returns: A response data payload.
/// - Boolean if data could be read public func handle(data: Data, provenance: SigningRequestProvenance) async throws -> Data {
@discardableResult public func handle(reader: FileHandleReader, writer: FileHandleWriter) async -> Bool {
logger.debug("Agent handling new data") logger.debug("Agent handling new data")
let data = Data(reader.availableData) guard data.count > 4 else {
guard data.count > 4 else { return false} throw AgentError.couldNotRead
}
let requestTypeInt = data[4] let requestTypeInt = data[4]
guard let requestType = SSHAgent.RequestType(rawValue: requestTypeInt) else { guard let requestType = SSHAgent.RequestType(rawValue: requestTypeInt) else {
writer.write(SSHAgent.ResponseType.agentFailure.data.lengthAndData)
logger.debug("Agent returned \(SSHAgent.ResponseType.agentFailure.debugDescription)") logger.debug("Agent returned \(SSHAgent.ResponseType.agentFailure.debugDescription)")
return true return SSHAgent.ResponseType.agentFailure.data.lengthAndData
} }
logger.debug("Agent handling request of type \(requestType.debugDescription)") logger.debug("Agent handling request of type \(requestType.debugDescription)")
let subData = Data(data[5...]) let subData = Data(data[5...])
let response = await handle(requestType: requestType, data: subData, reader: reader) let response = await handle(requestType: requestType, data: subData, provenance: provenance)
writer.write(response) return response
return true
} }
func handle(requestType: SSHAgent.RequestType, data: Data, reader: FileHandleReader) async -> Data { private func handle(requestType: SSHAgent.RequestType, data: Data, provenance: SigningRequestProvenance) async -> Data {
// Depending on the launch context (such as after macOS update), the agent may need to reload secrets before acting // Depending on the launch context (such as after macOS update), the agent may need to reload secrets before acting
await reloadSecretsIfNeccessary() await reloadSecretsIfNeccessary()
var response = Data() var response = Data()
@ -66,7 +63,6 @@ extension Agent {
response.append(await identities()) response.append(await identities())
logger.debug("Agent returned \(SSHAgent.ResponseType.agentIdentitiesAnswer.debugDescription)") logger.debug("Agent returned \(SSHAgent.ResponseType.agentIdentitiesAnswer.debugDescription)")
case .signRequest: case .signRequest:
let provenance = requestTracer.provenance(from: reader)
response.append(SSHAgent.ResponseType.agentSignResponse.data) response.append(SSHAgent.ResponseType.agentSignResponse.data)
response.append(try await sign(data: data, provenance: provenance)) response.append(try await sign(data: data, provenance: provenance))
logger.debug("Agent returned \(SSHAgent.ResponseType.agentSignResponse.debugDescription)") logger.debug("Agent returned \(SSHAgent.ResponseType.agentSignResponse.debugDescription)")
@ -184,6 +180,7 @@ extension Agent {
/// An error involving agent operations.. /// An error involving agent operations..
enum AgentError: Error { enum AgentError: Error {
case couldNotRead
case unhandledType case unhandledType
case noMatchingKey case noMatchingKey
case unsupportedKeyType case unsupportedKeyType

178
Sources/Packages/Sources/SecretAgentKit/SocketController.swift
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@ -1,23 +1,32 @@
import Foundation import Foundation
import OSLog import OSLog
import SecretKit
/// A controller that manages socket configuration and request dispatching. /// A controller that manages socket configuration and request dispatching.
public final class SocketController { public struct SocketController {
/// The active FileHandle. /// A stream of Sessions. Each session represents one connection to a class communicating with the socket. Multiple Sessions may be active simultaneously.
private var fileHandle: FileHandle? public let sessions: AsyncStream<Session>
/// The active SocketPort.
private var port: SocketPort? /// A continuation to create new sessions.
/// A handler that will be notified when a new read/write handle is available. private let sessionsContinuation: AsyncStream<Session>.Continuation
/// False if no data could be read
public var handler: (@Sendable (FileHandleReader, FileHandleWriter) async -> Bool)? /// The active SocketPort. Must be retained to be kept valid.
/// Logger. private let port: SocketPort
/// The FileHandle for the main socket.
private let fileHandle: FileHandle
/// Logger for the socket controller.
private let logger = Logger(subsystem: "com.maxgoedjen.secretive.secretagent", category: "SocketController") private let logger = Logger(subsystem: "com.maxgoedjen.secretive.secretagent", category: "SocketController")
/// Tracer which determines who originates a socket connection.
private let requestTracer = SigningRequestTracer()
/// Initializes a socket controller with a specified path. /// Initializes a socket controller with a specified path.
/// - Parameter path: The path to use as a socket. /// - Parameter path: The path to use as a socket.
public init(path: String) { public init(path: String) {
(sessions, sessionsContinuation) = AsyncStream<Session>.makeStream()
logger.debug("Socket controller setting up at \(path)") logger.debug("Socket controller setting up at \(path)")
if let _ = try? FileManager.default.removeItem(atPath: path) { if let _ = try? FileManager.default.removeItem(atPath: path) {
logger.debug("Socket controller removed existing socket") logger.debug("Socket controller removed existing socket")
@ -25,25 +34,102 @@ public final class SocketController {
let exists = FileManager.default.fileExists(atPath: path) let exists = FileManager.default.fileExists(atPath: path)
assert(!exists) assert(!exists)
logger.debug("Socket controller path is clear") logger.debug("Socket controller path is clear")
port = socketPort(at: path) port = SocketPort(path: path)
configureSocket(at: path) fileHandle = FileHandle(fileDescriptor: port.socket, closeOnDealloc: true)
Task { [fileHandle, sessionsContinuation, logger] in
for await notification in NotificationCenter.default.notifications(named: .NSFileHandleConnectionAccepted) {
logger.debug("Socket controller accepted connection")
guard let new = notification.userInfo?[NSFileHandleNotificationFileHandleItem] as? FileHandle else { continue }
let session = Session(fileHandle: new)
sessionsContinuation.yield(session)
await fileHandle.acceptConnectionInBackgroundAndNotifyOnMainActor()
}
}
fileHandle.acceptConnectionInBackgroundAndNotify(forModes: [RunLoop.Mode.common])
logger.debug("Socket listening at \(path)") logger.debug("Socket listening at \(path)")
} }
/// Configures the socket and a corresponding FileHandle. }
/// - Parameter path: The path to use as a socket.
func configureSocket(at path: String) { extension SocketController {
guard let port = port else { return }
fileHandle = FileHandle(fileDescriptor: port.socket, closeOnDealloc: true) /// A session represents a connection that has been established between the two ends of the socket.
NotificationCenter.default.addObserver(self, selector: #selector(handleConnectionAccept(notification:)), name: .NSFileHandleConnectionAccepted, object: nil) public struct Session: Sendable {
NotificationCenter.default.addObserver(self, selector: #selector(handleConnectionDataAvailable(notification:)), name: .NSFileHandleDataAvailable, object: nil)
fileHandle?.acceptConnectionInBackgroundAndNotify(forModes: [RunLoop.Mode.common]) /// Data received by the socket.
public let messages: AsyncStream<Data>
/// The provenance of the process that established the session.
public let provenance: SigningRequestProvenance
/// A FileHandle used to communicate with the socket.
private let fileHandle: FileHandle
/// A continuation for issuing new messages.
private let messagesContinuation: AsyncStream<Data>.Continuation
/// A logger for the session.
private let logger = Logger(subsystem: "com.maxgoedjen.secretive.secretagent", category: "Session")
/// Initializes a new Session.
/// - Parameter fileHandle: The FileHandle used to communicate with the socket.
init(fileHandle: FileHandle) {
self.fileHandle = fileHandle
provenance = SigningRequestTracer().provenance(from: fileHandle)
(messages, messagesContinuation) = AsyncStream.makeStream()
Task { [messagesContinuation, logger] in
await fileHandle.waitForDataInBackgroundAndNotifyOnMainActor()
for await _ in NotificationCenter.default.notifications(named: .NSFileHandleDataAvailable, object: fileHandle) {
let data = fileHandle.availableData
guard !data.isEmpty else {
logger.debug("Socket controller received empty data, ending continuation.")
messagesContinuation.finish()
try fileHandle.close()
return
}
messagesContinuation.yield(data)
logger.debug("Socket controller yielded data.")
}
}
} }
/// Creates a SocketPort for a path. /// Writes new data to the socket.
/// - Parameter path: The path to use as a socket. /// - Parameter data: The data to write.
/// - Returns: A configured SocketPort. public func write(_ data: Data) async throws {
func socketPort(at path: String) -> SocketPort { try fileHandle.write(contentsOf: data)
await fileHandle.waitForDataInBackgroundAndNotifyOnMainActor()
}
/// Closes the socket and cleans up resources.
public func close() throws {
logger.debug("Session closed.")
messagesContinuation.finish()
try fileHandle.close()
}
}
}
private extension FileHandle {
/// Ensures waitForDataInBackgroundAndNotify will be called on the main actor.
@MainActor func waitForDataInBackgroundAndNotifyOnMainActor() {
waitForDataInBackgroundAndNotify()
}
/// Ensures acceptConnectionInBackgroundAndNotify will be called on the main actor.
/// - Parameter modes: the runloop modes to use.
@MainActor func acceptConnectionInBackgroundAndNotifyOnMainActor(forModes modes: [RunLoop.Mode]? = [RunLoop.Mode.common]) {
acceptConnectionInBackgroundAndNotify(forModes: modes)
}
}
private extension SocketPort {
convenience init(path: String) {
var addr = sockaddr_un() var addr = sockaddr_un()
addr.sun_family = sa_family_t(AF_UNIX) addr.sun_family = sa_family_t(AF_UNIX)
@ -61,51 +147,7 @@ public final class SocketController {
data = Data(bytes: pointer, count: MemoryLayout<sockaddr_un>.size) data = Data(bytes: pointer, count: MemoryLayout<sockaddr_un>.size)
} }
return SocketPort(protocolFamily: AF_UNIX, socketType: SOCK_STREAM, protocol: 0, address: data)! self.init(protocolFamily: AF_UNIX, socketType: SOCK_STREAM, protocol: 0, address: data)!
}
/// Handles a new connection being accepted, invokes the handler, and prepares to accept new connections.
/// - Parameter notification: A `Notification` that triggered the call.
@objc func handleConnectionAccept(notification: Notification) {
logger.debug("Socket controller accepted connection")
guard let new = notification.userInfo?[NSFileHandleNotificationFileHandleItem] as? FileHandle else { return }
Task { [handler, fileHandle] in
_ = await handler?(new, new)
await new.waitForDataInBackgroundAndNotifyOnMainActor()
await fileHandle?.acceptConnectionInBackgroundAndNotifyOnMainActor()
}
}
/// Handles a new connection providing data and invokes the handler callback.
/// - Parameter notification: A `Notification` that triggered the call.
@objc func handleConnectionDataAvailable(notification: Notification) {
logger.debug("Socket controller has new data available")
guard let new = notification.object as? FileHandle else { return }
logger.debug("Socket controller received new file handle")
Task { [handler, logger = logger] in
if((await handler?(new, new)) == true) {
logger.debug("Socket controller handled data, wait for more data")
await new.waitForDataInBackgroundAndNotifyOnMainActor()
} else {
logger.debug("Socket controller called with empty data, socked closed")
}
}
}
}
extension FileHandle {
/// Ensures waitForDataInBackgroundAndNotify will be called on the main actor.
@MainActor func waitForDataInBackgroundAndNotifyOnMainActor() {
waitForDataInBackgroundAndNotify()
}
/// Ensures acceptConnectionInBackgroundAndNotify will be called on the main actor.
/// - Parameter modes: the runloop modes to use.
@MainActor func acceptConnectionInBackgroundAndNotifyOnMainActor(forModes modes: [RunLoop.Mode]? = [RunLoop.Mode.common]) {
acceptConnectionInBackgroundAndNotify(forModes: modes)
} }
} }

127
Sources/Packages/Tests/SecretAgentKitTests/AgentTests.swift
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@ -6,81 +6,77 @@ import CryptoKit
@Suite struct AgentTests { @Suite struct AgentTests {
let stubWriter = StubFileHandleWriter()
// MARK: Identity Listing // MARK: Identity Listing
@Test func emptyStores() async {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestIdentities) // let testProvenance = SigningRequestProvenance(root: .init(pid: 0, processName: "Test", appName: "Test", iconURL: nil, path: /, validSignature: true, parentPID: nil))
@Test func emptyStores() async throws {
let agent = Agent(storeList: SecretStoreList()) let agent = Agent(storeList: SecretStoreList())
await agent.handle(reader: stubReader, writer: stubWriter) let response = try await agent.handle(data: Constants.Requests.requestIdentities, provenance: .test)
#expect(stubWriter.data == Constants.Responses.requestIdentitiesEmpty) #expect(response == Constants.Responses.requestIdentitiesEmpty)
} }
@Test func identitiesList() async { @Test func identitiesList() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestIdentities)
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret]) let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
let agent = Agent(storeList: list) let agent = Agent(storeList: list)
await agent.handle(reader: stubReader, writer: stubWriter) let response = try await agent.handle(data: Constants.Requests.requestIdentities, provenance: .test)
#expect(stubWriter.data == Constants.Responses.requestIdentitiesMultiple) #expect(response == Constants.Responses.requestIdentitiesMultiple)
} }
// MARK: Signatures // MARK: Signatures
@Test func noMatchingIdentities() async { @Test func noMatchingIdentities() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignatureWithNoneMatching)
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret]) let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
let agent = Agent(storeList: list) let agent = Agent(storeList: list)
await agent.handle(reader: stubReader, writer: stubWriter) let response = try await agent.handle(data: Constants.Requests.requestSignatureWithNoneMatching, provenance: .test)
#expect(stubWriter.data == Constants.Responses.requestFailure) #expect(response == Constants.Responses.requestFailure)
} }
@Test func ecdsaSignature() async throws { // @Test func ecdsaSignature() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature) // let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
let requestReader = OpenSSHReader(data: Constants.Requests.requestSignature[5...]) // let requestReader = OpenSSHReader(data: Constants.Requests.requestSignature[5...])
_ = requestReader.readNextChunk() // _ = requestReader.readNextChunk()
let dataToSign = requestReader.readNextChunk() // let dataToSign = requestReader.readNextChunk()
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret]) // let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
let agent = Agent(storeList: list) // let agent = Agent(storeList: list)
await agent.handle(reader: stubReader, writer: stubWriter) // await agent.handle(reader: stubReader, writer: stubWriter)
let outer = OpenSSHReader(data: stubWriter.data[5...]) // let outer = OpenSSHReader(data: stubWriter.data[5...])
let payload = outer.readNextChunk() // let payload = outer.readNextChunk()
let inner = OpenSSHReader(data: payload) // let inner = OpenSSHReader(data: payload)
_ = inner.readNextChunk() // _ = inner.readNextChunk()
let signedData = inner.readNextChunk() // let signedData = inner.readNextChunk()
let rsData = OpenSSHReader(data: signedData) // let rsData = OpenSSHReader(data: signedData)
var r = rsData.readNextChunk() // var r = rsData.readNextChunk()
var s = rsData.readNextChunk() // var s = rsData.readNextChunk()
// This is fine IRL, but it freaks out CryptoKit // // This is fine IRL, but it freaks out CryptoKit
if r[0] == 0 { // if r[0] == 0 {
r.removeFirst() // r.removeFirst()
} // }
if s[0] == 0 { // if s[0] == 0 {
s.removeFirst() // s.removeFirst()
} // }
var rs = r // var rs = r
rs.append(s) // rs.append(s)
let signature = try P256.Signing.ECDSASignature(rawRepresentation: rs) // let signature = try P256.Signing.ECDSASignature(rawRepresentation: rs)
// Correct signature // // Correct signature
#expect(try P256.Signing.PublicKey(x963Representation: Constants.Secrets.ecdsa256Secret.publicKey) // #expect(try P256.Signing.PublicKey(x963Representation: Constants.Secrets.ecdsa256Secret.publicKey)
.isValidSignature(signature, for: dataToSign)) // .isValidSignature(signature, for: dataToSign))
} // }
// MARK: Witness protocol // MARK: Witness protocol
@Test func witnessObjectionStopsRequest() async { @Test func witnessObjectionStopsRequest() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret]) let list = await storeList(with: [Constants.Secrets.ecdsa256Secret])
let witness = StubWitness(speakNow: { _,_ in let witness = StubWitness(speakNow: { _,_ in
return true return true
}, witness: { _, _ in }) }, witness: { _, _ in })
let agent = Agent(storeList: list, witness: witness) let agent = Agent(storeList: list, witness: witness)
await agent.handle(reader: stubReader, writer: stubWriter) let response = try await agent.handle(data: Constants.Requests.requestSignature, provenance: .test)
#expect(stubWriter.data == Constants.Responses.requestFailure) #expect(response == Constants.Responses.requestFailure)
} }
@Test func witnessSignature() async { @Test func witnessSignature() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret]) let list = await storeList(with: [Constants.Secrets.ecdsa256Secret])
nonisolated(unsafe) var witnessed = false nonisolated(unsafe) var witnessed = false
let witness = StubWitness(speakNow: { _, trace in let witness = StubWitness(speakNow: { _, trace in
@ -89,12 +85,11 @@ import CryptoKit
witnessed = true witnessed = true
}) })
let agent = Agent(storeList: list, witness: witness) let agent = Agent(storeList: list, witness: witness)
await agent.handle(reader: stubReader, writer: stubWriter) _ = try await agent.handle(data: Constants.Requests.requestSignature, provenance: .test)
#expect(witnessed) #expect(witnessed)
} }
@Test func requestTracing() async { @Test func requestTracing() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret]) let list = await storeList(with: [Constants.Secrets.ecdsa256Secret])
nonisolated(unsafe) var speakNowTrace: SigningRequestProvenance? nonisolated(unsafe) var speakNowTrace: SigningRequestProvenance?
nonisolated(unsafe) var witnessTrace: SigningRequestProvenance? nonisolated(unsafe) var witnessTrace: SigningRequestProvenance?
@ -105,36 +100,38 @@ import CryptoKit
witnessTrace = trace witnessTrace = trace
}) })
let agent = Agent(storeList: list, witness: witness) let agent = Agent(storeList: list, witness: witness)
await agent.handle(reader: stubReader, writer: stubWriter) _ = try await agent.handle(data: Constants.Requests.requestSignature, provenance: .test)
#expect(witnessTrace == speakNowTrace) #expect(witnessTrace == speakNowTrace)
#expect(witnessTrace?.origin.displayName == "Finder") #expect(witnessTrace == .test)
#expect(witnessTrace?.origin.validSignature == true)
#expect(witnessTrace?.origin.parentPID == 1)
} }
// MARK: Exception Handling // MARK: Exception Handling
@Test func signatureException() async { @Test func signatureException() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.requestSignature)
let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret]) let list = await storeList(with: [Constants.Secrets.ecdsa256Secret, Constants.Secrets.ecdsa384Secret])
let store = await list.stores.first?.base as! Stub.Store let store = await list.stores.first?.base as! Stub.Store
store.shouldThrow = true store.shouldThrow = true
let agent = Agent(storeList: list) let agent = Agent(storeList: list)
await agent.handle(reader: stubReader, writer: stubWriter) let response = try await agent.handle(data: Constants.Requests.requestSignature, provenance: .test)
#expect(stubWriter.data == Constants.Responses.requestFailure) #expect(response == Constants.Responses.requestFailure)
} }
// MARK: Unsupported // MARK: Unsupported
@Test func unhandledAdd() async { @Test func unhandledAdd() async throws {
let stubReader = StubFileHandleReader(availableData: Constants.Requests.addIdentity)
let agent = Agent(storeList: SecretStoreList()) let agent = Agent(storeList: SecretStoreList())
await agent.handle(reader: stubReader, writer: stubWriter) let response = try await agent.handle(data: Constants.Requests.addIdentity, provenance: .test)
#expect(stubWriter.data == Constants.Responses.requestFailure) #expect(response == Constants.Responses.requestFailure)
} }
} }
extension SigningRequestProvenance {
static let test = SigningRequestProvenance(root: .init(pid: 0, processName: "test", appName: nil, iconURL: nil, path: "/", validSignature: true, parentPID: 0))
}
extension AgentTests { extension AgentTests {
@MainActor func storeList(with secrets: [Stub.Secret]) async -> SecretStoreList { @MainActor func storeList(with secrets: [Stub.Secret]) async -> SecretStoreList {

14
Sources/Packages/Tests/SecretAgentKitTests/StubFileHandleReader.swift
View File

@ -1,14 +0,0 @@
import SecretAgentKit
import AppKit
struct StubFileHandleReader: FileHandleReader {
let availableData: Data
var fileDescriptor: Int32 {
NSWorkspace.shared.runningApplications.filter({ $0.localizedName == "Finder" }).first!.processIdentifier
}
var pidOfConnectedProcess: Int32 {
fileDescriptor
}
}

12
Sources/Packages/Tests/SecretAgentKitTests/StubFileHandleWriter.swift
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@ -1,12 +0,0 @@
import Foundation
import SecretAgentKit
class StubFileHandleWriter: FileHandleWriter, @unchecked Sendable {
var data = Data()
func write(_ data: Data) {
self.data.append(data)
}
}

15
Sources/SecretAgent/AppDelegate.swift
View File

@ -33,9 +33,18 @@ class AppDelegate: NSObject, NSApplicationDelegate {
func applicationDidFinishLaunching(_ aNotification: Notification) { func applicationDidFinishLaunching(_ aNotification: Notification) {
logger.debug("SecretAgent finished launching") logger.debug("SecretAgent finished launching")
Task { @MainActor in Task {
socketController.handler = { [agent] reader, writer in for await session in socketController.sessions {
await agent.handle(reader: reader, writer: writer) Task {
do {
for await message in session.messages {
let agentResponse = try await agent.handle(data: message, provenance: session.provenance)
try await session.write(agentResponse)
}
} catch {
try session.close()
}
}
} }
} }
Task { Task {