udp

问题 I have a bit of a glitch in my game just now, everything runs fine if the server is started before the client however when the client is started before the server they never connect. This is all UDP The problem happens when the client tries to call recvfrom() before the server has started, when this happens the client never finds the server and the server never finds the client. The resulted error is a wouldblock. If I stop the client using recvfrom and start the client before the server (the

问题 I have a stream of PCM audio frames coming into my Python script, and I am able to save blocks of these frames as .wav files as such: def update_wav(): filename = "test.wav" wav_file = wave.open(filename, "wb") n_frames = len(audio) wav_file.setparams((n_channels, sample_width, sample_rate, n_frames, comptype, compname)) for sample in audio: wav_file.writeframes(struct.pack('h', int(sample * 32767.0))) wav_file.close() However, I'd like this to continually update as new frames come in. Is

问题 I'm sending from a .Net application 1404 float values which make up for 5616 bytes through an udp socket. I get no exceptions off this operation. However, the program receiving those data, is a C++ application, and when receiving such amount of data I get a 10040 message too long error. Apparently 1480bytes is the longest size possible for messages in Wsock2. What would be the easiest, cleanest way to fix this? Thanks! EDIT: Posting some code: This is my socket J_Receive class: #include "J

问题 this is my first post, sorry in advance if I do something I shouldn't. I always search here for answer but this time I saw nothing about my problem. I have a project in C# where I keep alive a connection UDP listening a multicast IP from a data streaming. The IP I'm listening is a multicast streamer that sends tracking data from many tracking systems, so we can assume the sender is not the problem. It sends like 1024 bytes packets, 60 fps. This is a small example extracted from the whole

问题 I am building a UDP-based application that receives and sends multiple packets. I could build a new DatagramPacket for each send, or I recycle one instance for the life of my application. Are there any advantages to reusing a DatagramPacket ? (e.g. memory-allocation) Are there any potential problems? (e.g. thread-safety) 回答1: It looks like you can't. I just tried sending the same DatagramPacket twice and I get the following behavior: The packet is sent only once Netty logs the warning below

问题 My client socket would suspend in receving data if the rand number generated in Server socket less than 4. I need to set up time out mechanism to allow client socket detect there is "time out" and then it would continue send message. After I run the server socket and then the client socket, an error message showed below: Traceback (most recent call last): File "E:\Studying\Python workspace\Client\src\Client.py", line 34, in <module> data , addr = client.recvfrom(1024) socket.timeout: timed

问题 My client socket would suspend in receving data if the rand number generated in Server socket less than 4. I need to set up time out mechanism to allow client socket detect there is "time out" and then it would continue send message. After I run the server socket and then the client socket, an error message showed below: Traceback (most recent call last): File "E:\Studying\Python workspace\Client\src\Client.py", line 34, in <module> data , addr = client.recvfrom(1024) socket.timeout: timed

问题 I have written a Java Client, which sends a message to the broadcast address. I have also written a Java Server, which accepts all sent messages and sends the message back to the client. Now I wanted to try to do exactly the same in Go, just for gaining some experience. The server works fine and is receiving a message and responding to the Java client. But my Go Client is only sending a message to the Go/Java server but does not receive any message back. According to wireshark the message is

问题 I have written a Java Client, which sends a message to the broadcast address. I have also written a Java Server, which accepts all sent messages and sends the message back to the client. Now I wanted to try to do exactly the same in Go, just for gaining some experience. The server works fine and is receiving a message and responding to the Java client. But my Go Client is only sending a message to the Go/Java server but does not receive any message back. According to wireshark the message is

问题 I'm trying to decode the following ASN1 message using Python b'\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x02\x89G\x11\x00\x1a\x01\x00\x10\x00\x80\x00\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x02\x98c\xc7h\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' This is my code: import asn1tools import socket import sys sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_address = ('239.118.122.97', 8947) #server_address = (