1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/*
* icmp.h
*
* Internet Control Message Protocol.
* RFC 792, 950, 1256, 1393, 1475, 2002, 2521
*
* Copyright (c) 2000 Dug Song <dugsong@monkey.org>
*
* $Id: icmp.h,v 1.14 2003/03/16 17:39:17 dugsong Exp $
*/
#ifndef DNET_ICMP_H
#define DNET_ICMP_H
#define ICMP_HDR_LEN 4 /* base ICMP header length */
#define ICMP_LEN_MIN 8 /* minimum ICMP message size, with header */
#ifndef __GNUC__
# define __attribute__(x)
# pragma pack(1)
#endif
/*
* ICMP header
*/
struct icmp_hdr {
uint8_t icmp_type; /* type of message, see below */
uint8_t icmp_code; /* type sub code */
uint16_t icmp_cksum; /* ones complement cksum of struct */
};
/*
* Types (icmp_type) and codes (icmp_code) -
* http://www.iana.org/assignments/icmp-parameters
*/
#define ICMP_CODE_NONE 0 /* for types without codes */
#define ICMP_ECHOREPLY 0 /* echo reply */
#define ICMP_UNREACH 3 /* dest unreachable, codes: */
#define ICMP_UNREACH_NET 0 /* bad net */
#define ICMP_UNREACH_HOST 1 /* bad host */
#define ICMP_UNREACH_PROTO 2 /* bad protocol */
#define ICMP_UNREACH_PORT 3 /* bad port */
#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
#define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */
#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
#define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */
#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence error */
#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
#define ICMP_SRCQUENCH 4 /* packet lost, slow down */
#define ICMP_REDIRECT 5 /* shorter route, codes: */
#define ICMP_REDIRECT_NET 0 /* for network */
#define ICMP_REDIRECT_HOST 1 /* for host */
#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
#define ICMP_ALTHOSTADDR 6 /* alternate host address */
#define ICMP_ECHO 8 /* echo service */
#define ICMP_RTRADVERT 9 /* router advertise, codes: */
#define ICMP_RTRADVERT_NORMAL 0 /* normal */
#define ICMP_RTRADVERT_NOROUTE_COMMON 16 /* selective routing */
#define ICMP_RTRSOLICIT 10 /* router solicitation */
#define ICMP_TIMEXCEED 11 /* time exceeded, code: */
#define ICMP_TIMEXCEED_INTRANS 0 /* ttl==0 in transit */
#define ICMP_TIMEXCEED_REASS 1 /* ttl==0 in reass */
#define ICMP_PARAMPROB 12 /* ip header bad */
#define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */
#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
#define ICMP_PARAMPROB_LENGTH 2 /* bad length */
#define ICMP_TSTAMP 13 /* timestamp request */
#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
#define ICMP_INFO 15 /* information request */
#define ICMP_INFOREPLY 16 /* information reply */
#define ICMP_MASK 17 /* address mask request */
#define ICMP_MASKREPLY 18 /* address mask reply */
#define ICMP_TRACEROUTE 30 /* traceroute */
#define ICMP_DATACONVERR 31 /* data conversion error */
#define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
#define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
#define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
#define ICMP_MOBILE_REG 35 /* mobile registration req */
#define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */
#define ICMP_DNS 37 /* domain name request */
#define ICMP_DNSREPLY 38 /* domain name reply */
#define ICMP_SKIP 39 /* SKIP */
#define ICMP_PHOTURIS 40 /* Photuris */
#define ICMP_PHOTURIS_UNKNOWN_INDEX 0 /* unknown sec index */
#define ICMP_PHOTURIS_AUTH_FAILED 1 /* auth failed */
#define ICMP_PHOTURIS_DECOMPRESS_FAILED 2 /* decompress failed */
#define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
#define ICMP_PHOTURIS_NEED_AUTHN 4 /* no authentication */
#define ICMP_PHOTURIS_NEED_AUTHZ 5 /* no authorization */
#define ICMP_TYPE_MAX 40
#define ICMP_INFOTYPE(type) \
((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
(type) == ICMP_RTRADVERT || (type) == ICMP_RTRSOLICIT || \
(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
(type) == ICMP_INFO || (type) == ICMP_INFOREPLY || \
(type) == ICMP_MASK || (type) == ICMP_MASKREPLY)
/*
* Echo message data
*/
struct icmp_msg_echo {
uint16_t icmp_id;
uint16_t icmp_seq;
uint8_t icmp_data __flexarr; /* optional data */
};
/*
* Fragmentation-needed (unreachable) message data
*/
struct icmp_msg_needfrag {
uint16_t icmp_void; /* must be zero */
uint16_t icmp_mtu; /* MTU of next-hop network */
uint8_t icmp_ip __flexarr; /* IP hdr + 8 bytes of pkt */
};
/*
* Unreachable, source quench, redirect, time exceeded,
* parameter problem message data
*/
struct icmp_msg_quote {
uint32_t icmp_void; /* must be zero */
#define icmp_gwaddr icmp_void /* router IP address to use */
#define icmp_pptr icmp_void /* ptr to bad octet field */
uint8_t icmp_ip __flexarr; /* IP hdr + 8 bytes of pkt */
};
/*
* Router advertisement message data, RFC 1256
*/
struct icmp_msg_rtradvert {
uint8_t icmp_num_addrs; /* # of address / pref pairs */
uint8_t icmp_wpa; /* words / address == 2 */
uint16_t icmp_lifetime; /* route lifetime in seconds */
struct icmp_msg_rtr_data {
uint32_t icmp_void;
#define icmp_gwaddr icmp_void /* router IP address */
uint32_t icmp_pref; /* router preference (usu 0) */
} icmp_rtr __flexarr; /* variable # of routers */
};
#define ICMP_RTR_PREF_NODEFAULT 0x80000000 /* do not use as default gw */
/*
* Timestamp message data
*/
struct icmp_msg_tstamp {
uint32_t icmp_id; /* identifier */
uint32_t icmp_seq; /* sequence number */
uint32_t icmp_ts_orig; /* originate timestamp */
uint32_t icmp_ts_rx; /* receive timestamp */
uint32_t icmp_ts_tx; /* transmit timestamp */
};
/*
* Address mask message data, RFC 950
*/
struct icmp_msg_mask {
uint32_t icmp_id; /* identifier */
uint32_t icmp_seq; /* sequence number */
uint32_t icmp_mask; /* address mask */
};
/*
* Traceroute message data, RFC 1393, RFC 1812
*/
struct icmp_msg_traceroute {
uint16_t icmp_id; /* identifier */
uint16_t icmp_void; /* unused */
uint16_t icmp_ohc; /* outbound hop count */
uint16_t icmp_rhc; /* return hop count */
uint32_t icmp_speed; /* link speed, bytes/sec */
uint32_t icmp_mtu; /* MTU in bytes */
};
/*
* Domain name reply message data, RFC 1788
*/
struct icmp_msg_dnsreply {
uint16_t icmp_id; /* identifier */
uint16_t icmp_seq; /* sequence number */
uint32_t icmp_ttl; /* time-to-live */
uint8_t icmp_names __flexarr; /* variable number of names */
};
/*
* Generic identifier, sequence number data
*/
struct icmp_msg_idseq {
uint16_t icmp_id;
uint16_t icmp_seq;
};
/*
* ICMP message union
*/
union icmp_msg {
struct icmp_msg_echo echo; /* ICMP_ECHO{REPLY} */
struct icmp_msg_quote unreach; /* ICMP_UNREACH */
struct icmp_msg_needfrag needfrag; /* ICMP_UNREACH_NEEDFRAG */
struct icmp_msg_quote srcquench; /* ICMP_SRCQUENCH */
struct icmp_msg_quote redirect; /* ICMP_REDIRECT (set to 0) */
uint32_t rtrsolicit; /* ICMP_RTRSOLICIT */
struct icmp_msg_rtradvert rtradvert; /* ICMP_RTRADVERT */
struct icmp_msg_quote timexceed; /* ICMP_TIMEXCEED */
struct icmp_msg_quote paramprob; /* ICMP_PARAMPROB */
struct icmp_msg_tstamp tstamp; /* ICMP_TSTAMP{REPLY} */
struct icmp_msg_idseq info; /* ICMP_INFO{REPLY} */
struct icmp_msg_mask mask; /* ICMP_MASK{REPLY} */
struct icmp_msg_traceroute traceroute; /* ICMP_TRACEROUTE */
struct icmp_msg_idseq dns; /* ICMP_DNS */
struct icmp_msg_dnsreply dnsreply; /* ICMP_DNSREPLY */
};
#ifndef __GNUC__
# pragma pack()
#endif
#define icmp_pack_hdr(hdr, type, code) do { \
struct icmp_hdr *icmp_pack_p = (struct icmp_hdr *)(hdr); \
icmp_pack_p->icmp_type = type; icmp_pack_p->icmp_code = code; \
} while (0)
#define icmp_pack_hdr_echo(hdr, type, code, id, seq, data, len) do { \
struct icmp_msg_echo *echo_pack_p = (struct icmp_msg_echo *) \
((uint8_t *)(hdr) + ICMP_HDR_LEN); \
icmp_pack_hdr(hdr, type, code); \
echo_pack_p->icmp_id = htons(id); \
echo_pack_p->icmp_seq = htons(seq); \
memmove(echo_pack_p->icmp_data, data, len); \
} while (0)
#define icmp_pack_hdr_quote(hdr, type, code, word, pkt, len) do { \
struct icmp_msg_quote *quote_pack_p = (struct icmp_msg_quote *) \
((uint8_t *)(hdr) + ICMP_HDR_LEN); \
icmp_pack_hdr(hdr, type, code); \
quote_pack_p->icmp_void = htonl(word); \
memmove(quote_pack_p->icmp_ip, pkt, len); \
} while (0)
#define icmp_pack_hdr_mask(hdr, type, code, id, seq, mask) do { \
struct icmp_msg_mask *mask_pack_p = (struct icmp_msg_mask *) \
((uint8_t *)(hdr) + ICMP_HDR_LEN); \
icmp_pack_hdr(hdr, type, code); \
mask_pack_p->icmp_id = htons(id); \
mask_pack_p->icmp_seq = htons(seq); \
mask_pack_p->icmp_mask = htonl(mask); \
} while (0)
#define icmp_pack_hdr_needfrag(hdr, type, code, mtu, pkt, len) do { \
struct icmp_msg_needfrag *frag_pack_p = \
(struct icmp_msg_needfrag *)((uint8_t *)(hdr) + ICMP_HDR_LEN); \
icmp_pack_hdr(hdr, type, code); \
frag_pack_p->icmp_void = 0; \
frag_pack_p->icmp_mtu = htons(mtu); \
memmove(frag_pack_p->icmp_ip, pkt, len); \
} while (0)
#endif /* DNET_ICMP_H */
|
