如何在C或目标C的IP / UDP数据包中对自己的数据包进行帧格式化？

Question

I have to communicate with a device which listens on a port for all incoming IP/UDP connection , Ethernet frame carries ip/udp packet which in turn have to carry my own packet say own packet, which is to be like following

|    first field              |   second field   |  third field  | fourth field |
|2byte message sequence number|1byte message type| Reserved field| Message Data |

how do i create my custom packet with these as my packet data?

Answer 1

1. Create a new socket, in datagram mode.
2. Format your content into a buffer.
3. Write the buffer to the socket.