Menu
My Problem: With net.Read... Methods copy only the number of bytes of the size of the given byte-array or slice. I don't want to allocate the maximum UDP datagram of 64 kB every time of course.
Is there a go way to determine the size of the datagram (which is in the datagram header) or read again until the datagram is completely read?
797
To receive packets from all the sending hosts, specify the remote IP address as 0.0. 0.0 . Match the port number specified in the Local IP Port parameter with the remote port number of the sending host.
Unlike send(), the recv() function of Python's socket module can be used to receive data from both TCP and UDP sockets.
A UDP datagram is carried in a single IP packet and is hence limited to a maximum payload of 65,507 bytes for IPv4 and 65,527 bytes for IPv6. The transmission of large IP packets usually requires IP fragmentation.
TCP vs UDP Once connected, a TCP socket can only send and receive to/from the remote machine. This means that you'll need one TCP socket for each client in your application. UDP is not connection-based, you can send and receive to/from anyone at any time with the same socket.
Try ReadFromUDP:
func (c *UDPConn) ReadFromUDP(b []byte) (n int, addr *UDPAddr, err error)
ReadFromUDP reads a UDP packet from c, copying the payload into b. It returns the number of bytes copied into b and the return address that was on the packet.
The packet size should be available from n, which you can then use to define a custom slice (or other data structure) to store the datagrams in. This relies on the datagram size not changing during the session, which it really shouldn't.
187
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
