Cannot receive custom packets with golang in linux

I’m a newbie in golang programming and I am trying to write a program that receives packets created by myself using Packeth software. When I run the program, it does not receive packets from Packeth, communication packets in the network are still received normally. When I open Wireshark, my program can receive packets from Packeth. This is my code.

package main

import (
    "fmt"
    "log"
    "net"
    "syscall"
)

func main() {
    const proto = 0x0300
    s, err := syscall.Socket(syscall.AF_PACKET, syscall.SOCK_RAW, proto)
    if err != nil {
        log.Fatal("socket: ", err)
    }
    defer syscall.Close(s)
    ifi, err := net.InterfaceByName("eth0")
    if err != nil {
        log.Fatal("interfacebyname: ", err)
    }
    lla := syscall.SockaddrLinklayer{Protocol: proto, Ifindex: ifi.Index}
    if err := syscall.Bind(s, &lla); err != nil {
        log.Fatal("bind: ", err)
    }
    for {
        b := make([]byte, 100)
        _, _, err := syscall.Recvfrom(s, b, 0)
        if err != nil {
            log.Fatal("recvfrom ", err)
        }
        log.Fatal(b[0:20])
    }
}