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 * ll_proto.c
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 * Authors:	Alexey Kuznetsov, <>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>

#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/sockios.h>

#include "utils.h"
#include "rt_names.h"

#define __PF(f,n) { ETH_P_##f, #n },
static const struct {
	int id;
	const char *name;
} llproto_names[] = {

{ 0x8100, "802.1Q" },
{ 0x88cc, "LLDP" },
{ ETH_P_IP, "ipv4" },
#undef __PF

const char * ll_proto_n2a(unsigned short id, char *buf, int len)
        int i;

	id = ntohs(id);

        for (i=0; !numeric && i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
                 if (llproto_names[i].id == id)
			return llproto_names[i].name;
        snprintf(buf, len, "[%d]", id);
        return buf;

int ll_proto_a2n(unsigned short *id, const char *buf)
        int i;
        for (i=0; i < sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
                 if (strcasecmp(llproto_names[i].name, buf) == 0) {
			 *id = htons(llproto_names[i].id);
			 return 0;
	if (get_be16(id, buf, 0))
		return -1;
	return 0;