Function libp2p_core::upgrade::read_length_prefixed

pub async fn read_length_prefixed(
    socket: &mut impl AsyncRead + Unpin, 
    max_size: usize
) -> Result<Vec<u8>>

Reads a length-prefixed message from the given socket.

The max_size parameter is the maximum size in bytes of the message that we accept. This is necessary in order to avoid DoS attacks where the remote sends us a message of several gigabytes.

Note: Assumes that a variable-length prefix indicates the length of the message. This is compatible with what write_length_prefixed does.