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Replace NEKit dependency with reduced subset

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relikd
2020-03-24 21:12:58 +01:00
parent 2473e77519
commit cbec3981bb
103 changed files with 24996 additions and 264 deletions
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76
GlassVPN/zhuhaow-NEKit/IPStack/Packet/IPMutablePacket.swift Executable file
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@@ -0,0 +1,76 @@
//import Foundation
//
//enum ChangeType {
// case Address, Port
//}
//
//public class IPMutablePacket {
// // Support only IPv4 for now
//
// let version: IPVersion
// let proto: TransportType
// let IPHeaderLength: Int
// var sourceAddress: IPv4Address {
// get {
// return IPv4Address(fromBytesInNetworkOrder: payload.bytes.advancedBy(12))
// }
// set {
// setIPv4Address(sourceAddress, newAddress: newValue, at: 12)
// }
// }
// var destinationAddress: IPv4Address {
// get {
// return IPv4Address(fromBytesInNetworkOrder: payload.bytes.advancedBy(16))
// }
// set {
// setIPv4Address(destinationAddress, newAddress: newValue, at: 16)
// }
// }
//
// let payload: NSMutableData
//
// public init(payload: NSData) {
// let vl = UnsafePointer<UInt8>(payload.bytes).memory
// version = IPVersion(rawValue: vl >> 4)!
// IPHeaderLength = Int(vl & 0x0F) * 4
// let p = UnsafePointer<UInt8>(payload.bytes.advancedBy(9)).memory
// proto = TransportType(rawValue: p)!
// self.payload = NSMutableData(data: payload)
// }
//
// func updateChecksum(oldValue: UInt16, newValue: UInt16, type: ChangeType) {
// if type == .Address {
// updateChecksum(oldValue, newValue: newValue, at: 10)
// }
// }
//
// // swiftlint:disable:next variable_name
// internal func updateChecksum(oldValue: UInt16, newValue: UInt16, at: Int) {
// let oldChecksum = UnsafePointer<UInt16>(payload.bytes.advancedBy(at)).memory
// let oc32 = UInt32(~oldChecksum)
// let ov32 = UInt32(~oldValue)
// let nv32 = UInt32(newValue)
// var newChecksum32 = oc32 &+ ov32 &+ nv32
// newChecksum32 = (newChecksum32 & 0xFFFF) + (newChecksum32 >> 16)
// newChecksum32 = (newChecksum32 & 0xFFFF) &+ (newChecksum32 >> 16)
// var newChecksum = ~UInt16(newChecksum32)
// payload.replaceBytesInRange(NSRange(location: at, length: 2), withBytes: &newChecksum, length: 2)
// }
//
// // swiftlint:disable:next variable_name
// private func foldChecksum(checksum: UInt32) -> UInt32 {
// var checksum = checksum
// while checksum > 0xFFFF {
// checksum = (checksum & 0xFFFF) + (checksum >> 16)
// }
// return checksum
// }
//
// // swiftlint:disable:next variable_name
// private func setIPv4Address(oldAddress: IPv4Address, newAddress: IPv4Address, at: Int) {
// payload.replaceBytesInRange(NSRange(location: at, length: 4), withBytes: newAddress.bytesInNetworkOrder, length: 4)
// updateChecksum(UnsafePointer<UInt16>(oldAddress.bytesInNetworkOrder).memory, newValue: UnsafePointer<UInt16>(newAddress.bytesInNetworkOrder).memory, type: .Address)
// updateChecksum(UnsafePointer<UInt16>(oldAddress.bytesInNetworkOrder).advancedBy(1).memory, newValue: UnsafePointer<UInt16>(newAddress.bytesInNetworkOrder).advancedBy(1).memory, type: .Address)
// }
//
//}