scsi: convert to QEMU Object Model
[qemu.git] / slirp / ip.h
1 /*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)ip.h 8.1 (Berkeley) 6/10/93
30 * ip.h,v 1.3 1994/08/21 05:27:30 paul Exp
31 */
32
33 #ifndef _IP_H_
34 #define _IP_H_
35
36 #ifdef HOST_WORDS_BIGENDIAN
37 # ifndef NTOHL
38 # define NTOHL(d)
39 # endif
40 # ifndef NTOHS
41 # define NTOHS(d)
42 # endif
43 # ifndef HTONL
44 # define HTONL(d)
45 # endif
46 # ifndef HTONS
47 # define HTONS(d)
48 # endif
49 #else
50 # ifndef NTOHL
51 # define NTOHL(d) ((d) = ntohl((d)))
52 # endif
53 # ifndef NTOHS
54 # define NTOHS(d) ((d) = ntohs((uint16_t)(d)))
55 # endif
56 # ifndef HTONL
57 # define HTONL(d) ((d) = htonl((d)))
58 # endif
59 # ifndef HTONS
60 # define HTONS(d) ((d) = htons((uint16_t)(d)))
61 # endif
62 #endif
63
64 typedef uint32_t n_long; /* long as received from the net */
65
66 /*
67 * Definitions for internet protocol version 4.
68 * Per RFC 791, September 1981.
69 */
70 #define IPVERSION 4
71
72 /*
73 * Structure of an internet header, naked of options.
74 */
75 struct ip {
76 #ifdef HOST_WORDS_BIGENDIAN
77 uint8_t ip_v:4, /* version */
78 ip_hl:4; /* header length */
79 #else
80 uint8_t ip_hl:4, /* header length */
81 ip_v:4; /* version */
82 #endif
83 uint8_t ip_tos; /* type of service */
84 uint16_t ip_len; /* total length */
85 uint16_t ip_id; /* identification */
86 uint16_t ip_off; /* fragment offset field */
87 #define IP_DF 0x4000 /* don't fragment flag */
88 #define IP_MF 0x2000 /* more fragments flag */
89 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
90 uint8_t ip_ttl; /* time to live */
91 uint8_t ip_p; /* protocol */
92 uint16_t ip_sum; /* checksum */
93 struct in_addr ip_src,ip_dst; /* source and dest address */
94 } QEMU_PACKED;
95
96 #define IP_MAXPACKET 65535 /* maximum packet size */
97
98 /*
99 * Definitions for IP type of service (ip_tos)
100 */
101 #define IPTOS_LOWDELAY 0x10
102 #define IPTOS_THROUGHPUT 0x08
103 #define IPTOS_RELIABILITY 0x04
104
105 /*
106 * Definitions for options.
107 */
108 #define IPOPT_COPIED(o) ((o)&0x80)
109 #define IPOPT_CLASS(o) ((o)&0x60)
110 #define IPOPT_NUMBER(o) ((o)&0x1f)
111
112 #define IPOPT_CONTROL 0x00
113 #define IPOPT_RESERVED1 0x20
114 #define IPOPT_DEBMEAS 0x40
115 #define IPOPT_RESERVED2 0x60
116
117 #define IPOPT_EOL 0 /* end of option list */
118 #define IPOPT_NOP 1 /* no operation */
119
120 #define IPOPT_RR 7 /* record packet route */
121 #define IPOPT_TS 68 /* timestamp */
122 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
123 #define IPOPT_LSRR 131 /* loose source route */
124 #define IPOPT_SATID 136 /* satnet id */
125 #define IPOPT_SSRR 137 /* strict source route */
126
127 /*
128 * Offsets to fields in options other than EOL and NOP.
129 */
130 #define IPOPT_OPTVAL 0 /* option ID */
131 #define IPOPT_OLEN 1 /* option length */
132 #define IPOPT_OFFSET 2 /* offset within option */
133 #define IPOPT_MINOFF 4 /* min value of above */
134
135 /*
136 * Time stamp option structure.
137 */
138 struct ip_timestamp {
139 uint8_t ipt_code; /* IPOPT_TS */
140 uint8_t ipt_len; /* size of structure (variable) */
141 uint8_t ipt_ptr; /* index of current entry */
142 #ifdef HOST_WORDS_BIGENDIAN
143 uint8_t ipt_oflw:4, /* overflow counter */
144 ipt_flg:4; /* flags, see below */
145 #else
146 uint8_t ipt_flg:4, /* flags, see below */
147 ipt_oflw:4; /* overflow counter */
148 #endif
149 union ipt_timestamp {
150 n_long ipt_time[1];
151 struct ipt_ta {
152 struct in_addr ipt_addr;
153 n_long ipt_time;
154 } ipt_ta[1];
155 } ipt_timestamp;
156 } QEMU_PACKED;
157
158 /* flag bits for ipt_flg */
159 #define IPOPT_TS_TSONLY 0 /* timestamps only */
160 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
161 #define IPOPT_TS_PRESPEC 3 /* specified modules only */
162
163 /* bits for security (not byte swapped) */
164 #define IPOPT_SECUR_UNCLASS 0x0000
165 #define IPOPT_SECUR_CONFID 0xf135
166 #define IPOPT_SECUR_EFTO 0x789a
167 #define IPOPT_SECUR_MMMM 0xbc4d
168 #define IPOPT_SECUR_RESTR 0xaf13
169 #define IPOPT_SECUR_SECRET 0xd788
170 #define IPOPT_SECUR_TOPSECRET 0x6bc5
171
172 /*
173 * Internet implementation parameters.
174 */
175 #define MAXTTL 255 /* maximum time to live (seconds) */
176 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
177 #define IPFRAGTTL 60 /* time to live for frags, slowhz */
178 #define IPTTLDEC 1 /* subtracted when forwarding */
179
180 #define IP_MSS 576 /* default maximum segment size */
181
182 #if SIZEOF_CHAR_P == 4
183 struct mbuf_ptr {
184 struct mbuf *mptr;
185 uint32_t dummy;
186 } QEMU_PACKED;
187 #else
188 struct mbuf_ptr {
189 struct mbuf *mptr;
190 } QEMU_PACKED;
191 #endif
192 struct qlink {
193 void *next, *prev;
194 };
195
196 /*
197 * Overlay for ip header used by other protocols (tcp, udp).
198 */
199 struct ipovly {
200 struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */
201 uint8_t ih_x1; /* (unused) */
202 uint8_t ih_pr; /* protocol */
203 uint16_t ih_len; /* protocol length */
204 struct in_addr ih_src; /* source internet address */
205 struct in_addr ih_dst; /* destination internet address */
206 } QEMU_PACKED;
207
208 /*
209 * Ip reassembly queue structure. Each fragment
210 * being reassembled is attached to one of these structures.
211 * They are timed out after ipq_ttl drops to 0, and may also
212 * be reclaimed if memory becomes tight.
213 * size 28 bytes
214 */
215 struct ipq {
216 struct qlink frag_link; /* to ip headers of fragments */
217 struct qlink ip_link; /* to other reass headers */
218 uint8_t ipq_ttl; /* time for reass q to live */
219 uint8_t ipq_p; /* protocol of this fragment */
220 uint16_t ipq_id; /* sequence id for reassembly */
221 struct in_addr ipq_src,ipq_dst;
222 } QEMU_PACKED;
223
224 /*
225 * Ip header, when holding a fragment.
226 *
227 * Note: ipf_link must be at same offset as frag_link above
228 */
229 struct ipasfrag {
230 struct qlink ipf_link;
231 struct ip ipf_ip;
232 } QEMU_PACKED;
233
234 #define ipf_off ipf_ip.ip_off
235 #define ipf_tos ipf_ip.ip_tos
236 #define ipf_len ipf_ip.ip_len
237 #define ipf_next ipf_link.next
238 #define ipf_prev ipf_link.prev
239
240 /*
241 * Structure stored in mbuf in inpcb.ip_options
242 * and passed to ip_output when ip options are in use.
243 * The actual length of the options (including ipopt_dst)
244 * is in m_len.
245 */
246 #define MAX_IPOPTLEN 40
247
248 struct ipoption {
249 struct in_addr ipopt_dst; /* first-hop dst if source routed */
250 int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
251 } QEMU_PACKED;
252
253 #endif