lib/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 <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 struct {
  34         int id;
  35         const char *name;
  36 } llproto_names[] = {
  37 __PF(LOOP,loop)
  38 __PF(PUP,pup)
  39 #ifdef ETH_P_PUPAT
  40 __PF(PUPAT,pupat)
  41 #endif
  42 __PF(IP,ip)
  43 __PF(X25,x25)
  44 __PF(ARP,arp)
  45 __PF(BPQ,bpq)
  46 #ifdef ETH_P_IEEEPUP
  47 __PF(IEEEPUP,ieeepup)
  48 #endif
  49 #ifdef ETH_P_IEEEPUPAT
  50 __PF(IEEEPUPAT,ieeepupat)
  51 #endif
  52 __PF(DEC,dec)
  53 __PF(DNA_DL,dna_dl)
  54 __PF(DNA_RC,dna_rc)
  55 __PF(DNA_RT,dna_rt)
  56 __PF(LAT,lat)
  57 __PF(DIAG,diag)
  58 __PF(CUST,cust)
  59 __PF(SCA,sca)
  60 __PF(RARP,rarp)
  61 __PF(ATALK,atalk)
  62 __PF(AARP,aarp)
  63 __PF(IPX,ipx)
  64 __PF(IPV6,ipv6)
  65 #ifdef ETH_P_PPP_DISC
  66 __PF(PPP_DISC,ppp_disc)
  67 #endif
  68 #ifdef ETH_P_PPP_SES
  69 __PF(PPP_SES,ppp_ses)
  70 #endif
  71 #ifdef ETH_P_ATMMPOA
  72 __PF(ATMMPOA,atmmpoa)
  73 #endif
  74 #ifdef ETH_P_ATMFATE
  75 __PF(ATMFATE,atmfate)
  76 #endif
  77
  78 __PF(802_3,802_3)
  79 __PF(AX25,ax25)
  80 __PF(ALL,all)
  81 __PF(802_2,802_2)
  82 __PF(SNAP,snap)
  83 __PF(DDCMP,ddcmp)
  84 __PF(WAN_PPP,wan_ppp)
  85 __PF(PPP_MP,ppp_mp)
  86 __PF(LOCALTALK,localtalk)
  87 __PF(PPPTALK,ppptalk)
  88 __PF(TR_802_2,tr_802_2)
  89 __PF(MOBITEX,mobitex)
  90 __PF(CONTROL,control)
  91 __PF(IRDA,irda)
  92 #ifdef ETH_P_ECONET
  93 __PF(ECONET,econet)
  94 #endif
  95
  96 { 0x8100, "802.1Q" },
  97 { ETH_P_IP, "ipv4" },
  98 };
  99 #undef __PF
 100
 101
 102 const char * ll_proto_n2a(unsigned short id, char *buf, int len)
 103 {
 104         int i;
 105
 106         id = ntohs(id);
 107
 108         for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
 109                  if (llproto_names[i].id == id)
 110                         return llproto_names[i].name;
 111         }
 112         snprintf(buf, len, "[%d]", id);
 113         return buf;
 114 }
 115
 116 int ll_proto_a2n(unsigned short *id, char *buf)
 117 {
 118         int i;
 119         for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
 120                  if (strcasecmp(llproto_names[i].name, buf) == 0) {
 121                          *id = htons(llproto_names[i].id);
 122                          return 0;
 123                  }
 124         }
 125         if (get_u16(id, buf, 0))
 126                 return -1;
 127         *id = htons(*id);
 128         return 0;
 129 }