override fun acceptInternal()

in core/src/main/java/com/github/shadowsocks/bg/VpnService.kt [74:95]

• 21 lines of code
• 5 McCabe index (conditional complexity)

        override fun acceptInternal(socket: LocalSocket) {
            if (socket.inputStream.read() == -1) return
            val success = socket.ancillaryFileDescriptors!!.single()!!.use { fd ->
                underlyingNetwork.let { network ->
                    if (network != null) try {
                        network.bindSocket(fd)
                        return@let true
                    } catch (e: IOException) {
                        when ((e.cause as? ErrnoException)?.errno) {
                            // also suppress ENONET (Machine is not on the network)
                            OsConstants.EPERM, OsConstants.EACCES, 64 -> Timber.d(e)
                            else -> Timber.w(e)
                        }
                        return@let false
                    }
                    protect(fd.int)
                }
            }
            try {
                socket.outputStream.write(if (success) 0 else 1)
            } catch (_: IOException) { }        // ignore connection early close
        }