networking/libiproute/ll_proto.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * ll_proto.c
   4  *
   5  *              This program is free software; you can redistribute it and/or
   6  *              modify it under the terms of the GNU General Public License
   7  *              as published by the Free Software Foundation; either version
   8  *              2 of the License, or (at your option) any later version.
   9  *
  10  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  11  */
  12
  13 #include "libbb.h"
  14 #include "rt_names.h"
  15 #include "utils.h"
  16
  17 #if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1
  18 #include <net/ethernet.h>
  19 #else
  20 #include <linux/if_ether.h>
  21 #endif
  22
  23 #if !ENABLE_WERROR
  24 #warning de-bloat
  25 #endif
  26 /* Before re-enabling this, please (1) conditionalize exotic protocols
  27  * on CONFIG_something, and (2) decouple strings and numbers
  28  * (use llproto_ids[] = n,n,n..; and llproto_names[] = "loop\0" "pup\0" ...;)
  29  */
  30
  31 #define __PF(f,n) { ETH_P_##f, #n },
  32 static struct {
  33         int id;
  34         const char *name;
  35 } llproto_names[] = {
  36 __PF(LOOP,loop)
  37 __PF(PUP,pup)
  38 #ifdef ETH_P_PUPAT
  39 __PF(PUPAT,pupat)
  40 #endif
  41 __PF(IP,ip)
  42 __PF(X25,x25)
  43 __PF(ARP,arp)
  44 __PF(BPQ,bpq)
  45 #ifdef ETH_P_IEEEPUP
  46 __PF(IEEEPUP,ieeepup)
  47 #endif
  48 #ifdef ETH_P_IEEEPUPAT
  49 __PF(IEEEPUPAT,ieeepupat)
  50 #endif
  51 __PF(DEC,dec)
  52 __PF(DNA_DL,dna_dl)
  53 __PF(DNA_RC,dna_rc)
  54 __PF(DNA_RT,dna_rt)
  55 __PF(LAT,lat)
  56 __PF(DIAG,diag)
  57 __PF(CUST,cust)
  58 __PF(SCA,sca)
  59 __PF(RARP,rarp)
  60 __PF(ATALK,atalk)
  61 __PF(AARP,aarp)
  62 __PF(IPX,ipx)
  63 __PF(IPV6,ipv6)
  64 #ifdef ETH_P_PPP_DISC
  65 __PF(PPP_DISC,ppp_disc)
  66 #endif
  67 #ifdef ETH_P_PPP_SES
  68 __PF(PPP_SES,ppp_ses)
  69 #endif
  70 #ifdef ETH_P_ATMMPOA
  71 __PF(ATMMPOA,atmmpoa)
  72 #endif
  73 #ifdef ETH_P_ATMFATE
  74 __PF(ATMFATE,atmfate)
  75 #endif
  76
  77 __PF(802_3,802_3)
  78 __PF(AX25,ax25)
  79 __PF(ALL,all)
  80 __PF(802_2,802_2)
  81 __PF(SNAP,snap)
  82 __PF(DDCMP,ddcmp)
  83 __PF(WAN_PPP,wan_ppp)
  84 __PF(PPP_MP,ppp_mp)
  85 __PF(LOCALTALK,localtalk)
  86 __PF(PPPTALK,ppptalk)
  87 __PF(TR_802_2,tr_802_2)
  88 __PF(MOBITEX,mobitex)
  89 __PF(CONTROL,control)
  90 __PF(IRDA,irda)
  91 #ifdef ETH_P_ECONET
  92 __PF(ECONET,econet)
  93 #endif
  94
  95 { 0x8100, "802.1Q" },
  96 { ETH_P_IP, "ipv4" },
  97 };
  98 #undef __PF
  99
 100
 101 const char* FAST_FUNC ll_proto_n2a(unsigned short id, char *buf, int len)
 102 {
 103         unsigned i;
 104         id = ntohs(id);
 105         for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 106                  if (llproto_names[i].id == id)
 107                         return llproto_names[i].name;
 108         }
 109         snprintf(buf, len, "[%d]", id);
 110         return buf;
 111 }
 112
 113 int FAST_FUNC ll_proto_a2n(unsigned short *id, char *buf)
 114 {
 115         unsigned i;
 116         for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 117                  if (strcasecmp(llproto_names[i].name, buf) == 0) {
 118                          i = llproto_names[i].id;
 119                          goto good;
 120                  }
 121         }
 122         i = bb_strtou(buf, NULL, 0);
 123         if (errno || i > 0xffff)
 124                 return -1;
 125  good:
 126         *id = htons(i);
 127         return 0;
 128 }