63 lines
2.1 KiB
Swift
63 lines
2.1 KiB
Swift
//
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// TetheringHiderApp.swift
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//
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//
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// Created by Jesús David Chapman Vélez on 12/08/26.
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//
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import Foundation
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enum SystemCommandError: LocalizedError {
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case executionFailed(String)
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case userCancelledAuth
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case scriptError(String)
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var errorDescription: String? {
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switch self {
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case .executionFailed(let reason):
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return "Command failed: \(reason)"
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case .userCancelledAuth:
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return "Administrator authentication was cancelled."
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case .scriptError(let detail):
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return "Script error: \(detail)"
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}
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}
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}
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struct SystemCommandService: Sendable {
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/// Sets IPv4 TTL, IPv6 Hop Limit, and flushes system DNS cache with administrator privileges.
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func setTTL(_ value: Int) async throws {
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let command = "sysctl -w net.inet.ip.ttl=\(value) && sysctl -w net.inet6.ip6.hlim=\(value) && dscacheutil -flushcache && killall -HUP mDNSResponder"
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try await executeWithAdminPrivileges(command)
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}
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/// Resets IPv4 TTL and IPv6 Hop Limit to default (64) and flushes DNS cache.
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func resetTTL() async throws {
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try await setTTL(64)
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}
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/// Executes a shell command with administrator privileges via NSAppleScript
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@MainActor
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private func executeWithAdminPrivileges(_ command: String) async throws {
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let scriptSource = "do shell script \"\(command)\" with administrator privileges"
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guard let script = NSAppleScript(source: scriptSource) else {
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throw SystemCommandError.scriptError("Failed to create AppleScript.")
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}
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var errorDict: NSDictionary?
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script.executeAndReturnError(&errorDict)
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if let error = errorDict {
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let errorNumber = error[NSAppleScript.errorNumber] as? Int ?? -1
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let errorMessage = error[NSAppleScript.errorMessage] as? String ?? "Unknown error"
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if errorNumber == -128 {
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throw SystemCommandError.userCancelledAuth
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}
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throw SystemCommandError.executionFailed(errorMessage)
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}
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}
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}
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