plugins/linux.h

   1 /*
   2  * Special compatibility definitions for linux.
   3  *
   4  *      On the linux platform, several IP-related structures have
   5  *      different names. Also some of the structure fields have
   6  *      other names, although the layout is (obviously) fixed.
   7  *      Several constants are not defined in the standard files.
   8  *
   9  *      @(#)linux.h             e07@nikhef.nl (Eric Wassenaar) 960301
  10  *
  11  * XXX [src] - This is a complete ripoff from the fping program
  12  */
  13
  14 #if defined(linux)
  15
  16 #include <endian.h>                             /* to get the proper BYTE_ORDER */
  17
  18 #if !defined(BYTE_ORDER) || (BYTE_ORDER != BIG_ENDIAN && \
  19      BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != PDP_ENDIAN)
  20 error "Undefined or invalid BYTE_ORDER";
  21 #endif
  22
  23 /*
  24  * Structure of an ip header, without options.
  25  */
  26
  27 #define IPVERSION       4
  28
  29 struct ip {
  30 #if (BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN)
  31         u_char ip_hl:4,                         /* header length */
  32           ip_v:4;                                       /* version */
  33 #else
  34         u_char ip_v:4,                          /* version */
  35           ip_hl:4;                                      /* header length */
  36 #endif
  37         u_char ip_tos;                          /* type of service */
  38         short ip_len;                           /* total length */
  39         u_short ip_id;                          /* identification */
  40         short ip_off;                           /* fragment offset field */
  41 #define IP_DF 0x4000                    /* dont fragment flag */
  42 #define IP_MF 0x2000                    /* more fragments flag */
  43         u_char ip_ttl;                          /* time to live */
  44         u_char ip_p;                            /* protocol */
  45         u_short ip_sum;                         /* checksum */
  46         struct in_addr ip_src, ip_dst;  /* source and dest address */
  47 };
  48
  49 #define IP_MAXPACKET    65535   /* maximum packet size */
  50
  51 /*
  52  * Structure of an icmp header.
  53  */
  54
  55 struct icmp {
  56         u_char icmp_type;                       /* type of message, see below */
  57         u_char icmp_code;                       /* type sub code */
  58         u_short icmp_cksum;                     /* ones complement cksum of struct */
  59         union {
  60                 u_char ih_pptr;                 /* ICMP_PARAMPROB */
  61                 struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
  62                 struct ih_idseq {
  63                         n_short icd_id;
  64                         n_short icd_seq;
  65                 } ih_idseq;
  66                 int ih_void;
  67         } icmp_hun;
  68 #define icmp_pptr       icmp_hun.ih_pptr
  69 #define icmp_gwaddr     icmp_hun.ih_gwaddr
  70 #define icmp_id         icmp_hun.ih_idseq.icd_id
  71 #define icmp_seq        icmp_hun.ih_idseq.icd_seq
  72 #define icmp_void       icmp_hun.ih_void
  73         union {
  74                 struct id_ts {
  75                         n_time its_otime;
  76                         n_time its_rtime;
  77                         n_time its_ttime;
  78                 } id_ts;
  79                 struct id_ip {
  80                         struct ip idi_ip;
  81                         /* options and then 64 bits of data */
  82                 } id_ip;
  83                 u_long id_mask;
  84                 char id_data[1];
  85         } icmp_dun;
  86 #define icmp_otime      icmp_dun.id_ts.its_otime
  87 #define icmp_rtime      icmp_dun.id_ts.its_rtime
  88 #define icmp_ttime      icmp_dun.id_ts.its_ttime
  89 #define icmp_ip         icmp_dun.id_ip.idi_ip
  90 #define icmp_mask       icmp_dun.id_mask
  91 #define icmp_data       icmp_dun.id_data
  92 };
  93
  94 #define ICMP_MINLEN     8                       /* abs minimum */
  95
  96 /*
  97  * Definition of icmp type and code field values.
  98  */
  99
 100 #define ICMP_ECHOREPLY          0       /* echo reply */
 101 #define ICMP_UNREACH            3       /* dest unreachable, codes: */
 102 #define         ICMP_UNREACH_NET                0       /* bad net */
 103 #define         ICMP_UNREACH_HOST               1       /* bad host */
 104 #define         ICMP_UNREACH_PROTOCOL   2       /* bad protocol */
 105 #define         ICMP_UNREACH_PORT               3       /* bad port */
 106 #define         ICMP_UNREACH_NEEDFRAG   4       /* IP_DF caused drop */
 107 #define         ICMP_UNREACH_SRCFAIL    5       /* src route failed */
 108 #define ICMP_SOURCEQUENCH       4       /* packet lost, slow down */
 109 #define ICMP_REDIRECT           5       /* shorter route, codes: */
 110 #define         ICMP_REDIRECT_NET               0       /* for network */
 111 #define         ICMP_REDIRECT_HOST              1       /* for host */
 112 #define         ICMP_REDIRECT_TOSNET    2       /* for tos and net */
 113 #define         ICMP_REDIRECT_TOSHOST   3       /* for tos and host */
 114 #define ICMP_ECHO                       8       /* echo service */
 115 #define ICMP_TIMXCEED           11      /* time exceeded, codes: */
 116 #define         ICMP_TIMXCEED_INTRANS   0       /* ttl==0 in transit */
 117 #define         ICMP_TIMXCEED_REASS             1       /* ttl==0 in reass */
 118 #define ICMP_PARAMPROB          12              /* ip header bad */
 119 #define ICMP_TSTAMP                     13              /* timestamp request */
 120 #define ICMP_TSTAMPREPLY        14              /* timestamp reply */
 121 #define ICMP_IREQ                       15              /* information request */
 122 #define ICMP_IREQREPLY          16              /* information reply */
 123 #define ICMP_MASKREQ            17              /* address mask request */
 124 #define ICMP_MASKREPLY          18              /* address mask reply */
 125
 126 /*
 127  * Definitions needed for the udp header structure.
 128  */
 129
 130 #define uh_sport        source
 131 #define uh_dport        dest
 132 #define uh_ulen         len
 133 #define uh_sum          check
 134
 135 #endif /* linux */