Finding if port is closed when connecting to UDP server

Hello Everybody hope yall having wonderful day. I need a just quick help am working on an enumeration tool for SNMP. The issue is when i connect to udp port it’s normal that idk if it open or closed, however when sending or receiving i should know then at least that what the normal send, recv syscalls does. Here is the code example am working on. fn connectSnmp(ip: net.IpAddress, io: Io) !net.Stream { const stream = try ip.connect(io, .{ .mode = .dgram, .protocol = .udp, .timeout = .none })...