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