74 lines
2.6 KiB
Swift
74 lines
2.6 KiB
Swift
import Darwin
|
|
import SystemConfiguration
|
|
|
|
public enum Socks5Tunnel {
|
|
|
|
private static var tunnelFileDescriptor: Int32? {
|
|
var ctlInfo = ctl_info()
|
|
withUnsafeMutablePointer(to: &ctlInfo.ctl_name) {
|
|
$0.withMemoryRebound(to: CChar.self, capacity: MemoryLayout.size(ofValue: $0.pointee)) {
|
|
_ = strcpy($0, "com.apple.net.utun_control") // strcpy comes from Darwin
|
|
}
|
|
}
|
|
for fd: Int32 in 0...1024 {
|
|
var addr = sockaddr_ctl()
|
|
var ret: Int32 = -1
|
|
var len = socklen_t(MemoryLayout.size(ofValue: addr)) // socklen_t comes from Darwin
|
|
withUnsafeMutablePointer(to: &addr) {
|
|
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) { // sockaddr from Darwin
|
|
ret = getpeername(fd, $0, &len) // getpeername from Darwin
|
|
}
|
|
}
|
|
if ret != 0 || addr.sc_family != AF_SYSTEM { // AF_SYSTEM from Darwin
|
|
continue
|
|
}
|
|
if ctlInfo.ctl_id == 0 {
|
|
ret = ioctl(fd, CTLIOCGINFO, &ctlInfo) // ioctl from Darwin
|
|
if ret != 0 {
|
|
continue
|
|
}
|
|
}
|
|
if addr.sc_id == ctlInfo.ctl_id {
|
|
return fd
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
private static var interfaceName: String? {
|
|
guard let tunnelFileDescriptor = self.tunnelFileDescriptor else {
|
|
return nil
|
|
}
|
|
var buffer = [UInt8](repeating: 0, count: Int(IFNAMSIZ)) // IFNAMSIZ from Darwin
|
|
return buffer.withUnsafeMutableBufferPointer { mutableBufferPointer in
|
|
guard let baseAddress = mutableBufferPointer.baseAddress else {
|
|
return nil
|
|
}
|
|
var ifnameSize = socklen_t(IFNAMSIZ) // socklen_t and IFNAMSIZ from Darwin
|
|
let result = getsockopt(
|
|
tunnelFileDescriptor,
|
|
2 /* SYSPROTO_CONTROL */,
|
|
2 /* UTUN_OPT_IFNAME */,
|
|
baseAddress,
|
|
&ifnameSize
|
|
)
|
|
if result == 0 {
|
|
return String(cString: baseAddress)
|
|
} else {
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
@discardableResult
|
|
public static func run(withConfig filePath: String) -> Int32 {
|
|
guard let fileDescriptor = self.tunnelFileDescriptor else {
|
|
fatalError("Get tunnel file descriptor failed.")
|
|
}
|
|
return hev_socks5_tunnel_main(filePath.cString(using: .utf8), fileDescriptor)
|
|
}
|
|
|
|
public static func quit() {
|
|
hev_socks5_tunnel_quit()
|
|
}
|
|
}
|