C.struct_in_addr

main.go

package main

// #include <arpa/inet.h>
import "C"
import (
	"encoding/binary"
	"fmt"
	"net"
	"unsafe"
)

func main() {
	var addr C.struct_in_addr
	fmt.Printf("sizeof=%d, %d\n", unsafe.Sizeof(addr), addr.s_addr)
	goip := net.ParseIP("192.168.1.1")
	addr.s_addr = (C.in_addr_t)(binary.LittleEndian.Uint32(goip.To4()))
	fmt.Printf("%d\n", addr.s_addr)
}