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 */
14 #if defined(linux)
16 #include <endian.h> /* to get the proper BYTE_ORDER */
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
23 /*
24 * Structure of an ip header, without options.
25 */
27 #define IPVERSION 4
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 };
49 #define IP_MAXPACKET 65535 /* maximum packet size */
51 /*
52 * Structure of an icmp header.
53 */
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 };
94 #define ICMP_MINLEN 8 /* abs minimum */
96 /*
97 * Definition of icmp type and code field values.
98 */
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 */
126 /*
127 * Definitions needed for the udp header structure.
128 */
130 #define uh_sport source
131 #define uh_dport dest
132 #define uh_ulen len
133 #define uh_sum check
135 #endif /* linux */