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 <linux/netdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/sockios.h>
  23 #include <netinet/in.h>
  24 #include <arpa/inet.h>
  25 #include <string.h>
  26
  27 #include "utils.h"
  28
  29
  30 #define __PF(f,n) { ETH_P_##f, #n },
  31 static struct {
  32         int id;
  33         char *name;
  34 } llproto_names[] = {
  35 __PF(LOOP,loop)
  36 __PF(PUP,pup)
  37 #ifdef ETH_P_PUPAT
  38 __PF(PUPAT,pupat)
  39 #endif
  40 __PF(IP,ip)
  41 __PF(X25,x25)
  42 __PF(ARP,arp)
  43 __PF(BPQ,bpq)
  44 #ifdef ETH_P_IEEEPUP
  45 __PF(IEEEPUP,ieeepup)
  46 #endif
  47 #ifdef ETH_P_IEEEPUPAT
  48 __PF(IEEEPUPAT,ieeepupat)
  49 #endif
  50 __PF(DEC,dec)
  51 __PF(DNA_DL,dna_dl)
  52 __PF(DNA_RC,dna_rc)
  53 __PF(DNA_RT,dna_rt)
  54 __PF(LAT,lat)
  55 __PF(DIAG,diag)
  56 __PF(CUST,cust)
  57 __PF(SCA,sca)
  58 __PF(RARP,rarp)
  59 __PF(ATALK,atalk)
  60 __PF(AARP,aarp)
  61 __PF(IPX,ipx)
  62 __PF(IPV6,ipv6)
  63 #ifdef ETH_P_PPP_DISC
  64 __PF(PPP_DISC,ppp_disc)
  65 #endif
  66 #ifdef ETH_P_PPP_SES
  67 __PF(PPP_SES,ppp_ses)
  68 #endif
  69 #ifdef ETH_P_ATMMPOA
  70 __PF(ATMMPOA,atmmpoa)
  71 #endif
  72 #ifdef ETH_P_ATMFATE
  73 __PF(ATMFATE,atmfate)
  74 #endif
  75
  76 __PF(802_3,802_3)
  77 __PF(AX25,ax25)
  78 __PF(ALL,all)
  79 __PF(802_2,802_2)
  80 __PF(SNAP,snap)
  81 __PF(DDCMP,ddcmp)
  82 __PF(WAN_PPP,wan_ppp)
  83 __PF(PPP_MP,ppp_mp)
  84 __PF(LOCALTALK,localtalk)
  85 __PF(PPPTALK,ppptalk)
  86 __PF(TR_802_2,tr_802_2)
  87 __PF(MOBITEX,mobitex)
  88 __PF(CONTROL,control)
  89 __PF(IRDA,irda)
  90 #ifdef ETH_P_ECONET
  91 __PF(ECONET,econet)
  92 #endif
  93
  94 { 0x8100, "802.1Q" },
  95 { ETH_P_IP, "ipv4" },
  96 };
  97 #undef __PF
  98
  99
 100 char * ll_proto_n2a(unsigned short id, char *buf, int len)
 101 {
 102         int i;
 103
 104         id = ntohs(id);
 105
 106         for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
 107                  if (llproto_names[i].id == id)
 108                         return llproto_names[i].name;
 109         }
 110         snprintf(buf, len, "[%d]", id);
 111         return buf;
 112 }
 113
 114 int ll_proto_a2n(unsigned short *id, char *buf)
 115 {
 116         int i;
 117         for (i=0; i<sizeof(llproto_names)/sizeof(llproto_names[0]); i++) {
 118                  if (strcasecmp(llproto_names[i].name, buf) == 0) {
 119                          *id = htons(llproto_names[i].id);
 120                          return 0;
 121                  }
 122         }
 123         if (get_u16(id, buf, 0))
 124                 return -1;
 125         *id = htons(*id);
 126         return 0;
 127 }