networking/libiproute/ll_proto.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License
   5  * as published by the Free Software Foundation; either version
   6  * 2 of the License, or (at your option) any later version.
   7  *
   8  * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
   9  */
  10
  11 #include "libbb.h"
  12 #include "rt_names.h"
  13 #include "utils.h"
  14
  15 #include <netinet/if_ether.h>
  16
  17 #if !ENABLE_WERROR
  18 #warning de-bloat
  19 #endif
  20 /* Before re-enabling this, please (1) conditionalize exotic protocols
  21  * on CONFIG_something, and (2) decouple strings and numbers
  22  * (use llproto_ids[] = n,n,n..; and llproto_names[] = "loop\0" "pup\0" ...;)
  23  */
  24
  25 #define __PF(f,n) { ETH_P_##f, #n },
  26 static struct {
  27         int id;
  28         const char *name;
  29 } llproto_names[] = {
  30 __PF(LOOP,loop)
  31 __PF(PUP,pup)
  32 #ifdef ETH_P_PUPAT
  33 __PF(PUPAT,pupat)
  34 #endif
  35 __PF(IP,ip)
  36 __PF(X25,x25)
  37 __PF(ARP,arp)
  38 __PF(BPQ,bpq)
  39 #ifdef ETH_P_IEEEPUP
  40 __PF(IEEEPUP,ieeepup)
  41 #endif
  42 #ifdef ETH_P_IEEEPUPAT
  43 __PF(IEEEPUPAT,ieeepupat)
  44 #endif
  45 __PF(DEC,dec)
  46 __PF(DNA_DL,dna_dl)
  47 __PF(DNA_RC,dna_rc)
  48 __PF(DNA_RT,dna_rt)
  49 __PF(LAT,lat)
  50 __PF(DIAG,diag)
  51 __PF(CUST,cust)
  52 __PF(SCA,sca)
  53 __PF(RARP,rarp)
  54 __PF(ATALK,atalk)
  55 __PF(AARP,aarp)
  56 __PF(IPX,ipx)
  57 __PF(IPV6,ipv6)
  58 #ifdef ETH_P_PPP_DISC
  59 __PF(PPP_DISC,ppp_disc)
  60 #endif
  61 #ifdef ETH_P_PPP_SES
  62 __PF(PPP_SES,ppp_ses)
  63 #endif
  64 #ifdef ETH_P_ATMMPOA
  65 __PF(ATMMPOA,atmmpoa)
  66 #endif
  67 #ifdef ETH_P_ATMFATE
  68 __PF(ATMFATE,atmfate)
  69 #endif
  70
  71 __PF(802_3,802_3)
  72 __PF(AX25,ax25)
  73 __PF(ALL,all)
  74 __PF(802_2,802_2)
  75 __PF(SNAP,snap)
  76 __PF(DDCMP,ddcmp)
  77 __PF(WAN_PPP,wan_ppp)
  78 __PF(PPP_MP,ppp_mp)
  79 __PF(LOCALTALK,localtalk)
  80 __PF(PPPTALK,ppptalk)
  81 __PF(TR_802_2,tr_802_2)
  82 __PF(MOBITEX,mobitex)
  83 __PF(CONTROL,control)
  84 __PF(IRDA,irda)
  85 #ifdef ETH_P_ECONET
  86 __PF(ECONET,econet)
  87 #endif
  88
  89 { 0x8100, "802.1Q" },
  90 { ETH_P_IP, "ipv4" },
  91 };
  92 #undef __PF
  93
  94
  95 const char* FAST_FUNC ll_proto_n2a(unsigned short id, char *buf, int len)
  96 {
  97         unsigned i;
  98         id = ntohs(id);
  99         for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 100                  if (llproto_names[i].id == id)
 101                         return llproto_names[i].name;
 102         }
 103         snprintf(buf, len, "[%d]", id);
 104         return buf;
 105 }
 106
 107 int FAST_FUNC ll_proto_a2n(unsigned short *id, char *buf)
 108 {
 109         unsigned i;
 110         for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 111                  if (strcasecmp(llproto_names[i].name, buf) == 0) {
 112                          i = llproto_names[i].id;
 113                          goto good;
 114                  }
 115         }
 116         i = bb_strtou(buf, NULL, 0);
 117         if (errno || i > 0xffff)
 118                 return -1;
 119  good:
 120         *id = htons(i);
 121         return 0;
 122 }