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 <netinet/in.h>
  20 #include <arpa/inet.h>
  21 #include <string.h>
  22
  23 #include <linux/netdevice.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/sockios.h>
  26
  27 #include "utils.h"
  28 #include "rt_names.h"
  29
  30
  31 #define __PF(f,n) { ETH_P_##f, #n },
  32 static const struct {
  33         int id;
  34         const char *name;
  35 } llproto_names[] = {
  36 __PF(LOOP,loop)
  37 __PF(PUP,pup)
  38 __PF(PUPAT,pupat)
  39 __PF(IP,ip)
  40 __PF(X25,x25)
  41 __PF(ARP,arp)
  42 __PF(BPQ,bpq)
  43 __PF(IEEEPUP,ieeepup)
  44 __PF(IEEEPUPAT,ieeepupat)
  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 __PF(PPP_DISC,ppp_disc)
  59 __PF(PPP_SES,ppp_ses)
  60 __PF(ATMMPOA,atmmpoa)
  61 __PF(ATMFATE,atmfate)
  62 __PF(802_3,802_3)
  63 __PF(AX25,ax25)
  64 __PF(ALL,all)
  65 __PF(802_2,802_2)
  66 __PF(SNAP,snap)
  67 __PF(DDCMP,ddcmp)
  68 __PF(WAN_PPP,wan_ppp)
  69 __PF(PPP_MP,ppp_mp)
  70 __PF(LOCALTALK,localtalk)
  71 __PF(CAN,can)
  72 __PF(PPPTALK,ppptalk)
  73 __PF(TR_802_2,tr_802_2)
  74 __PF(MOBITEX,mobitex)
  75 __PF(CONTROL,control)
  76 __PF(IRDA,irda)
  77 __PF(ECONET,econet)
  78 __PF(TIPC,tipc)
  79 __PF(AOE,aoe)
  80 __PF(8021Q,802.1Q)
  81 __PF(8021AD,802.1ad)
  82
  83 { 0x8100, "802.1Q" },
  84 { 0x88cc, "LLDP" },
  85 { ETH_P_IP, "ipv4" },
  86 };
  87 #undef __PF
  88
  89
  90 const char * ll_proto_n2a(unsigned short id, char *buf, int len)
  91 {
  92         int i;
  93
  94         id = ntohs(id);
  95
  96         for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
  97                  if (llproto_names[i].id == id)
  98                         return llproto_names[i].name;
  99         }
 100         snprintf(buf, len, "[%d]", id);
 101         return buf;
 102 }
 103
 104 int ll_proto_a2n(unsigned short *id, const char *buf)
 105 {
 106         int i;
 107         for (i=0; i < sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
 108                  if (strcasecmp(llproto_names[i].name, buf) == 0) {
 109                          *id = htons(llproto_names[i].id);
 110                          return 0;
 111                  }
 112         }
 113         if (get_be16(id, buf, 0))
 114                 return -1;
 115         return 0;
 116 }