networking/libiproute/ll_proto.c

   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@ms2.inr.ac.ru>
  10  */
  11
  12 #include <stdio.h>
  13 #include <arpa/inet.h>
  14 #include <string.h>
  15
  16 #include <linux/if_arp.h>
  17
  18 #include "utils.h"
  19
  20
  21 #define __PF(f,n) { ETH_P_##f, #n },
  22 static struct {
  23         int id;
  24         char *name;
  25 } llproto_names[] = {
  26 __PF(LOOP,loop)
  27 __PF(PUP,pup)
  28 #ifdef ETH_P_PUPAT
  29 __PF(PUPAT,pupat)
  30 #endif
  31 __PF(IP,ip)
  32 __PF(X25,x25)
  33 __PF(ARP,arp)
  34 __PF(BPQ,bpq)
  35 #ifdef ETH_P_IEEEPUP
  36 __PF(IEEEPUP,ieeepup)
  37 #endif
  38 #ifdef ETH_P_IEEEPUPAT
  39 __PF(IEEEPUPAT,ieeepupat)
  40 #endif
  41 __PF(DEC,dec)
  42 __PF(DNA_DL,dna_dl)
  43 __PF(DNA_RC,dna_rc)
  44 __PF(DNA_RT,dna_rt)
  45 __PF(LAT,lat)
  46 __PF(DIAG,diag)
  47 __PF(CUST,cust)
  48 __PF(SCA,sca)
  49 __PF(RARP,rarp)
  50 __PF(ATALK,atalk)
  51 __PF(AARP,aarp)
  52 __PF(IPX,ipx)
  53 __PF(IPV6,ipv6)
  54 #ifdef ETH_P_PPP_DISC
  55 __PF(PPP_DISC,ppp_disc)
  56 #endif
  57 #ifdef ETH_P_PPP_SES
  58 __PF(PPP_SES,ppp_ses)
  59 #endif
  60 #ifdef ETH_P_ATMMPOA
  61 __PF(ATMMPOA,atmmpoa)
  62 #endif
  63 #ifdef ETH_P_ATMFATE
  64 __PF(ATMFATE,atmfate)
  65 #endif
  66
  67 __PF(802_3,802_3)
  68 __PF(AX25,ax25)
  69 __PF(ALL,all)
  70 __PF(802_2,802_2)
  71 __PF(SNAP,snap)
  72 __PF(DDCMP,ddcmp)
  73 __PF(WAN_PPP,wan_ppp)
  74 __PF(PPP_MP,ppp_mp)
  75 __PF(LOCALTALK,localtalk)
  76 __PF(PPPTALK,ppptalk)
  77 __PF(TR_802_2,tr_802_2)
  78 __PF(MOBITEX,mobitex)
  79 __PF(CONTROL,control)
  80 __PF(IRDA,irda)
  81 #ifdef ETH_P_ECONET
  82 __PF(ECONET,econet)
  83 #endif
  84
  85 { 0x8100, "802.1Q" },
  86 { ETH_P_IP, "ipv4" },
  87 };
  88 #undef __PF
  89
  90
  91 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, 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 }