user/sendip/ipv4.h

   1 /* ip.h
   2  */
   3 #ifndef _SENDIP_IP_H
   4 #define _SENDIP_IP_H
   5
   6 /* IP HEADER
   7  * Taken from glibc 2.2, and modified
   8  */
   9 typedef struct {
  10 #if __BYTE_ORDER == __LITTLE_ENDIAN
  11         unsigned int header_len:4;
  12         unsigned int version:4;
  13 #elif __BYTE_ORDER == __BIG_ENDIAN
  14         unsigned int version:4;
  15         unsigned int header_len:4;
  16 #else
  17 #  error "Please fix <bits/endian.h>"
  18 #endif
  19         u_int8_t tos;
  20         u_int16_t tot_len;
  21         u_int16_t id;
  22 #if __BYTE_ORDER == __LITTLE_ENDIAN
  23         u_int16_t frag_off1:5;
  24         u_int16_t mf:1;
  25         u_int16_t df:1;
  26         u_int16_t res:1;
  27         u_int16_t frag_off2:8;
  28 #define IP_SET_FRAGOFF(ip,v) {(ip)->frag_off1=((v)&0x1F00)>>8;(ip)->frag_off2=(v)&0x00FF;}
  29 #elif __BYTE_ORDER == __BIG_ENDIAN
  30         u_int16_t res:1;
  31         u_int16_t df:1;
  32         u_int16_t mf:1;
  33         u_int16_t frag_off:13;
  34 #define IP_SET_FRAGOFF(ip,v) (ip)->frag_off=(v)
  35 #else
  36 #  error "Please fix <bits/endian.h>"
  37 #endif
  38         u_int8_t ttl;
  39         u_int8_t protocol;
  40         u_int16_t check;
  41         u_int32_t saddr;
  42         u_int32_t daddr;
  43 } ip_header;
  44
  45 /* Defines for which parts have been modified
  46  */
  47 #define IP_MOD_HEADERLEN  (1)
  48 #define IP_MOD_VERSION    (1<<1)
  49 #define IP_MOD_TOS        (1<<2)
  50 #define IP_MOD_TOTLEN     (1<<3)
  51 #define IP_MOD_ID         (1<<4)
  52 #define IP_MOD_RES        (1<<5)
  53 #define IP_MOD_DF         (1<<6)
  54 #define IP_MOD_MF         (1<<7)
  55 #define IP_MOD_FRAGOFF    (1<<8)
  56 #define IP_MOD_TTL        (1<<9)
  57 #define IP_MOD_PROTOCOL   (1<<10)
  58 #define IP_MOD_CHECK      (1<<11)
  59 #define IP_MOD_SADDR      (1<<12)
  60 #define IP_MOD_DADDR      (1<<13)
  61
  62 /* Options
  63  */
  64 sendip_option ip_opts[] = {
  65         {"s",1,"Source IP address (see README)","127.0.0.1"},
  66         {"d",1,"Desitnation IP address","Correct"},
  67         {"h",1,"IP header length (see README)","Correct"},
  68         {"v",1,"IP version (you almost definately don't want to change this)","4"},
  69         {"y",1,"IP type of service","0"},
  70         {"l",1,"Total IP packet length (see README)","Correct"},
  71         {"i",1,"IP packet ID (see README)","Random"},
  72         {"fr",1,"IP reservced flag (see README)","0 (options are 0,1,r)"},
  73         {"fd",1,"IP don't fragment flag (see README)","0 (options are 0,1,r)"},
  74         {"fm",1,"IP more fragments flag (see README)","0 (options are 0,1,r)"},
  75         {"f",1,"IP fragment offset","0"},
  76         {"t",1,"IP time to live","255"},
  77         {"p",1,"IP protcol","0, or set by underlying protocol"},
  78         {"c",1,"IP checksum (see README)","Correct"},
  79
  80         {"onum",1,"IP option as string of hex bytes (length is always correct)","(no options)"},
  81         {"oeol",0,"IP option: end of list",NULL},
  82         {"onop",0,"IP option: no-op",NULL},
  83         {"orr",1,"IP option: record route. Format: pointer:addr1:addr2:...",NULL},
  84         {"ots",1,"IP option: timestamp. Format: pointer:overflow:flag:(ip1:)ts1:(ip2:)ts2:...",NULL},
  85         {"olsr",1,"IP option: loose source route. Format: pointer:addr1:addr2:...",NULL},
  86         {"osid",1,"IP option: stream identifier",NULL},
  87         {"ossr",1,"IP option: strict source route. Format: pointer:addr1:addr2:...",NULL}
  88 };
  89
  90 #endif  /* _SENDIP_IP_H */