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      1 /*
      2  * ll_proto.c
      3  *
      4  *		This program is free software; you can redistribute it and/or
      5  *		modify it under the terms of the GNU General Public License
      6  *		as published by the Free Software Foundation; either version
      7  *		2 of the License, or (at your option) any later version.
      8  *
      9  * Authors:	Alexey Kuznetsov, <kuznet (at) ms2.inr.ac.ru>
     10  */
     11 
     12 #include <stdio.h>
     13 #include <stdlib.h>
     14 #include <unistd.h>
     15 #include <syslog.h>
     16 #include <fcntl.h>
     17 #include <sys/ioctl.h>
     18 #include <sys/socket.h>
     19 #include <sys/ioctl.h>
     20 #include <netinet/in.h>
     21 #include <arpa/inet.h>
     22 #include <string.h>
     23 
     24 #include <linux/netdevice.h>
     25 #include <linux/if_arp.h>
     26 #include <linux/sockios.h>
     27 
     28 #include "utils.h"
     29 #include "rt_names.h"
     30 
     31 
     32 #define __PF(f,n) { ETH_P_##f, #n },
     33 static const struct {
     34 	int id;
     35 	const char *name;
     36 } llproto_names[] = {
     37 __PF(LOOP,loop)
     38 __PF(PUP,pup)
     39 __PF(PUPAT,pupat)
     40 __PF(IP,ip)
     41 __PF(X25,x25)
     42 __PF(ARP,arp)
     43 __PF(BPQ,bpq)
     44 __PF(IEEEPUP,ieeepup)
     45 __PF(IEEEPUPAT,ieeepupat)
     46 __PF(DEC,dec)
     47 __PF(DNA_DL,dna_dl)
     48 __PF(DNA_RC,dna_rc)
     49 __PF(DNA_RT,dna_rt)
     50 __PF(LAT,lat)
     51 __PF(DIAG,diag)
     52 __PF(CUST,cust)
     53 __PF(SCA,sca)
     54 __PF(RARP,rarp)
     55 __PF(ATALK,atalk)
     56 __PF(AARP,aarp)
     57 __PF(IPX,ipx)
     58 __PF(IPV6,ipv6)
     59 __PF(PPP_DISC,ppp_disc)
     60 __PF(PPP_SES,ppp_ses)
     61 __PF(ATMMPOA,atmmpoa)
     62 __PF(ATMFATE,atmfate)
     63 __PF(802_3,802_3)
     64 __PF(AX25,ax25)
     65 __PF(ALL,all)
     66 __PF(802_2,802_2)
     67 __PF(SNAP,snap)
     68 __PF(DDCMP,ddcmp)
     69 __PF(WAN_PPP,wan_ppp)
     70 __PF(PPP_MP,ppp_mp)
     71 __PF(LOCALTALK,localtalk)
     72 __PF(CAN,can)
     73 __PF(PPPTALK,ppptalk)
     74 __PF(TR_802_2,tr_802_2)
     75 __PF(MOBITEX,mobitex)
     76 __PF(CONTROL,control)
     77 __PF(IRDA,irda)
     78 __PF(ECONET,econet)
     79 __PF(TIPC,tipc)
     80 __PF(AOE,aoe)
     81 __PF(8021Q,802.1Q)
     82 __PF(8021AD,802.1ad)
     83 
     84 { 0x8100, "802.1Q" },
     85 { 0x88cc, "LLDP" },
     86 { ETH_P_IP, "ipv4" },
     87 };
     88 #undef __PF
     89 
     90 
     91 const char * ll_proto_n2a(unsigned short id, char *buf, int len)
     92 {
     93         int i;
     94 
     95 	id = ntohs(id);
     96 
     97         for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
     98                  if (llproto_names[i].id == id)
     99 			return llproto_names[i].name;
    100 	}
    101         snprintf(buf, len, "[%d]", id);
    102         return buf;
    103 }
    104 
    105 int ll_proto_a2n(unsigned short *id, const char *buf)
    106 {
    107         int i;
    108         for (i=0; i < sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
    109                  if (strcasecmp(llproto_names[i].name, buf) == 0) {
    110 			 *id = htons(llproto_names[i].id);
    111 			 return 0;
    112 		 }
    113 	}
    114 	if (get_u16(id, buf, 0))
    115 		return -1;
    116 	*id = htons(*id);
    117 	return 0;
    118 }
    119