xaionaro-go / udpnofrag

Disable UDP fragmentation

To the extent possible under law, Dmitrii Okunev has waived all copyright and related or neighboring rights to "A package to disable UDP fragmentation. This work is published from: Ireland".

Quick start

package main

import (
    "log"
    "net"

    "github.com/xaionaro-go/udpnofrag"
)

func main() {
    conn, err := net.DialUDP("udp", nil, &net.UDPAddr{
        IP:net.ParseIP("192.168.0.1"),
        Port:443,
    })
    if err != nil {
        log.Fatal(err)
    }

    err = udpnofrag.UDPSetNoFragment(conn)
    if err != nil {
        log.Fatal(err)
    }
    
    b := make([]byte, 4096)
    _, err = conn.Write(b)
    if err != nil {
        log.Fatal(err)
    }
}

$ go run ./example.go 
2020/06/01 11:43:04 write udp 192.168.0.129:60695->192.168.0.1:443: write: message too long
exit status 1