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zengcity/swift

Created September 15, 2019 05:19
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swift
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)
}
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