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feat(emulator): take in options as an optional argument
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package xsensemulator | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "net" | ||
| "time" | ||
| ) | ||
|
|
||
| type UDPSerialPort struct { | ||
| io.ReadWriteCloser | ||
| opts *udpSerialPortOptions | ||
| OriginConn *net.UDPConn | ||
| DestinationAddr *net.UDPAddr | ||
| } | ||
|
|
||
| func NewUDPSerialPort( | ||
| origin string, | ||
| destination string, | ||
| udpSerialOpts ...UDPSerialPortOption, | ||
| ) (*UDPSerialPort, error) { | ||
| opts := defaultOptions() | ||
| for _, udpSerialOpt := range udpSerialOpts { | ||
| udpSerialOpt(opts) | ||
| } | ||
|
|
||
| udpOriginAddr, err := net.ResolveUDPAddr("udp", origin) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("new udp serial port: %w", err) | ||
| } | ||
| udpDestinationAddr, err := net.ResolveUDPAddr("udp", destination) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("new udp serial port: %w", err) | ||
| } | ||
| originConn, err := net.ListenUDP("udp", udpOriginAddr) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("new udp serial port: %w", err) | ||
| } | ||
| return &UDPSerialPort{ | ||
| opts: opts, | ||
| OriginConn: originConn, | ||
| DestinationAddr: udpDestinationAddr, | ||
| }, nil | ||
| } | ||
|
|
||
| func (t UDPSerialPort) Read(p []byte) (n int, err error) { | ||
| // Check if a timeout opts have been added | ||
| if t.opts.timeout != time.Duration(0) { | ||
| err = t.OriginConn.SetReadDeadline(time.Now().Add(t.opts.timeout)) | ||
| if err != nil { | ||
| return 0, fmt.Errorf("udp serial port read: %w", err) | ||
| } | ||
| } | ||
| n, _, err = t.OriginConn.ReadFromUDP(p) | ||
| return n, err | ||
| } | ||
|
|
||
| func (t UDPSerialPort) Write(p []byte) (n int, err error) { | ||
| // Check if a timeout opts have been added | ||
| if t.opts.timeout != time.Duration(0) { | ||
| err = t.OriginConn.SetWriteDeadline(time.Now().Add(t.opts.timeout)) | ||
| if err != nil { | ||
| return 0, fmt.Errorf("udp serial port write: %w", err) | ||
| } | ||
| } | ||
| return t.OriginConn.WriteToUDP(p, t.DestinationAddr) | ||
| } | ||
|
|
||
| func (t UDPSerialPort) Close() error { | ||
| return t.OriginConn.Close() | ||
| } | ||
|
|
||
| type udpSerialPortOptions struct { | ||
| // Timeout for setting read/write deadlines | ||
| timeout time.Duration | ||
| } | ||
|
|
||
| // defaultOptions returns udpSerialPortOptions with sensible default values. | ||
| func defaultOptions() *udpSerialPortOptions { | ||
| return &udpSerialPortOptions{} | ||
| } | ||
|
|
||
| // UDPSerialPortOption configures an UDPSerialPort. | ||
| type UDPSerialPortOption func(*udpSerialPortOptions) | ||
|
|
||
| // WithTransmitInterface configures the interface to transmit on. | ||
| func WithTimeout(timeout time.Duration) UDPSerialPortOption { | ||
| return func(opt *udpSerialPortOptions) { | ||
| opt.timeout = timeout | ||
| } | ||
| } |