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Swift 3 networking primitives
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// Not sure this all works | |
// I only use copyAsSockAddr which seems fine | |
extension sockaddr_in { | |
var addressString: String { | |
let sadr: UInt32 = self.sin_addr.s_addr | |
let b = (UInt8( sadr >> 24 ), | |
UInt8((sadr >> 16) & 0xff), | |
UInt8((sadr >> 8) & 0xff), | |
UInt8( sadr & 0xff)) | |
return String(format:"%d.%d.%d.%d", b.0, b.1, b.2, b.3) | |
} | |
init() { | |
self.sin_len = UInt8(MemoryLayout<sockaddr_in>.size) | |
self.sin_family = 0 | |
self.sin_port = 0 | |
self.sin_addr = in_addr(s_addr: 0) | |
self.sin_zero = (0,0,0,0,0,0,0,0) | |
} | |
init(port: UInt16) { | |
self.init() | |
self.sin_family = UInt8(AF_INET) | |
self.sin_port = port.bigEndian | |
} | |
init(_ saddr: sockaddr) { | |
self = saddr.copyAsSockAddrIn() | |
} | |
func copyAsSockAddr() -> sockaddr { | |
let len = self.sin_len | |
let family = self.sin_family | |
let port = self.sin_port.bigEndian | |
let (hi, lo) = ((port >> 8).asInt8, (port & 0x00ff).asInt8) | |
let sadr: UInt32 = self.sin_addr.s_addr.bigEndian | |
let b = (Int8( sadr >> 24 ), | |
Int8((sadr >> 16) & 0xff), | |
Int8((sadr >> 8) & 0xff), | |
Int8( sadr & 0xff)) | |
let z: Int8 = 0 | |
let data = (hi, lo, b.0, b.1, b.2, b.3, z,z,z,z,z,z,z,z) | |
return sockaddr(sa_len: len, sa_family: family, sa_data: data) | |
} | |
func unsafeCopyAsSockAddr() -> sockaddr { | |
return unsafeBitCast(self, to: sockaddr.self) | |
} | |
} | |
extension sockaddr { | |
init(_ saddr_in: sockaddr_in) { | |
self = saddr_in.copyAsSockAddr() | |
} | |
func copyAsSockAddrIn() -> sockaddr_in { | |
let len = UInt8(MemoryLayout<sockaddr_in>.size) | |
let family = self.sa_family | |
let (hi, lo) = (self.sa_data.0, self.sa_data.1) | |
let port = (UInt16(hi) << 8) | UInt16(lo) | |
let b = (UInt32(UInt8(bitPattern: self.sa_data.2)), | |
UInt32(UInt8(bitPattern: self.sa_data.3)), | |
UInt32(UInt8(bitPattern: self.sa_data.4)), | |
UInt32(UInt8(bitPattern: self.sa_data.5))) | |
let sadr = b.0 << 24 | b.1 << 16 | b.2 << 8 | b.3 | |
let addr = in_addr(s_addr: sadr) | |
return sockaddr_in(sin_len: len, sin_family: family, sin_port: port, | |
sin_addr: addr, sin_zero: (0,0,0,0,0,0,0,0)) | |
} | |
func unsafeCopyAsSockAddrIn() -> sockaddr_in { | |
return unsafeBitCast(self, to: sockaddr_in.self) | |
} | |
} | |
extension UInt16 { | |
var asInt8: Int8 { | |
let v = self & 0xff | |
return Int8(v >> 4) << 4 | Int8(v & 0xf) | |
} | |
} |
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