busybox/networking/libiproute/ll_proto.c

/* vi: set sw=4 ts=4: */
/*
 * 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, <kuznet@ms2.inr.ac.ru>
 */
#include "libbb.h"
#include "rt_names.h"
#include "utils.h"

#include <netinet/if_ether.h>

/* Please conditionalize exotic protocols on CONFIG_something */

static const uint16_t llproto_ids[] ALIGN2 = {
#define __PF(f,n) ETH_P_##f,
__PF(LOOP,loop)
__PF(PUP,pup)
#ifdef ETH_P_PUPAT
__PF(PUPAT,pupat)
#endif
__PF(IP,ip)
__PF(X25,x25)
__PF(ARP,arp)
__PF(BPQ,bpq)
#ifdef ETH_P_IEEEPUP
__PF(IEEEPUP,ieeepup)
#endif
#ifdef ETH_P_IEEEPUPAT
__PF(IEEEPUPAT,ieeepupat)
#endif
__PF(DEC,dec)
__PF(DNA_DL,dna_dl)
__PF(DNA_RC,dna_rc)
__PF(DNA_RT,dna_rt)
__PF(LAT,lat)
__PF(DIAG,diag)
__PF(CUST,cust)
__PF(SCA,sca)
__PF(RARP,rarp)
__PF(ATALK,atalk)
__PF(AARP,aarp)
__PF(IPX,ipx)
__PF(IPV6,ipv6)
#ifdef ETH_P_PPP_DISC
__PF(PPP_DISC,ppp_disc)
#endif
#ifdef ETH_P_PPP_SES
__PF(PPP_SES,ppp_ses)
#endif
#ifdef ETH_P_ATMMPOA
__PF(ATMMPOA,atmmpoa)
#endif
#ifdef ETH_P_ATMFATE
__PF(ATMFATE,atmfate)
#endif

__PF(802_3,802_3)
__PF(AX25,ax25)
__PF(ALL,all)
__PF(802_2,802_2)
__PF(SNAP,snap)
__PF(DDCMP,ddcmp)
__PF(WAN_PPP,wan_ppp)
__PF(PPP_MP,ppp_mp)
__PF(LOCALTALK,localtalk)
__PF(PPPTALK,ppptalk)
__PF(TR_802_2,tr_802_2)
__PF(MOBITEX,mobitex)
__PF(CONTROL,control)
__PF(IRDA,irda)
#ifdef ETH_P_ECONET
__PF(ECONET,econet)
#endif

0x8100,
ETH_P_IP
};
#undef __PF

/* Keep declarations above and below in sync! */

static const char llproto_names[] ALIGN1 =
#define __PF(f,n) #n "\0"
__PF(LOOP,loop)
__PF(PUP,pup)
#ifdef ETH_P_PUPAT
__PF(PUPAT,pupat)
#endif
__PF(IP,ip)
__PF(X25,x25)
__PF(ARP,arp)
__PF(BPQ,bpq)
#ifdef ETH_P_IEEEPUP
__PF(IEEEPUP,ieeepup)
#endif
#ifdef ETH_P_IEEEPUPAT
__PF(IEEEPUPAT,ieeepupat)
#endif
__PF(DEC,dec)
__PF(DNA_DL,dna_dl)
__PF(DNA_RC,dna_rc)
__PF(DNA_RT,dna_rt)
__PF(LAT,lat)
__PF(DIAG,diag)
__PF(CUST,cust)
__PF(SCA,sca)
__PF(RARP,rarp)
__PF(ATALK,atalk)
__PF(AARP,aarp)
__PF(IPX,ipx)
__PF(IPV6,ipv6)
#ifdef ETH_P_PPP_DISC
__PF(PPP_DISC,ppp_disc)
#endif
#ifdef ETH_P_PPP_SES
__PF(PPP_SES,ppp_ses)
#endif
#ifdef ETH_P_ATMMPOA
__PF(ATMMPOA,atmmpoa)
#endif
#ifdef ETH_P_ATMFATE
__PF(ATMFATE,atmfate)
#endif

__PF(802_3,802_3)
__PF(AX25,ax25)
__PF(ALL,all)
__PF(802_2,802_2)
__PF(SNAP,snap)
__PF(DDCMP,ddcmp)
__PF(WAN_PPP,wan_ppp)
__PF(PPP_MP,ppp_mp)
__PF(LOCALTALK,localtalk)
__PF(PPPTALK,ppptalk)
__PF(TR_802_2,tr_802_2)
__PF(MOBITEX,mobitex)
__PF(CONTROL,control)
__PF(IRDA,irda)
#ifdef ETH_P_ECONET
__PF(ECONET,econet)
#endif

"802.1Q" "\0"
"ipv4" "\0"
;
#undef __PF


const char* FAST_FUNC ll_proto_n2a(unsigned short id, char *buf, int len)
{
	unsigned i;
	id = ntohs(id);
	for (i = 0; i < ARRAY_SIZE(llproto_ids); i++) {
		if (llproto_ids[i] == id)
			return nth_string(llproto_names, i);
	}
	snprintf(buf, len, "[%u]", id);
	return buf;
}

int FAST_FUNC ll_proto_a2n(unsigned short *id, char *buf)
{
	unsigned i;
	const char *name = llproto_names;
	for (i = 0; i < ARRAY_SIZE(llproto_ids); i++) {
		if (strcasecmp(name, buf) == 0) {
			i = llproto_ids[i];
			goto good;
		}
		name += strlen(name) + 1;
	}
	errno = 0;
	i = bb_strtou(buf, NULL, 0);
	if (errno || i > 0xffff)
		return -1;
 good:
	*id = htons(i);
	return 0;
}