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1.1 root 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. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)ip.h 8.1 (Berkeley) 6/10/93
34: * ip.h,v 1.3 1994/08/21 05:27:30 paul Exp
35: */
36:
37: #ifndef _IP_H_
38: #define _IP_H_
39:
40: #ifdef WORDS_BIGENDIAN
41: # ifndef NTOHL
42: # define NTOHL(d)
43: # endif
44: # ifndef NTOHS
45: # define NTOHS(d)
46: # endif
47: # ifndef HTONL
48: # define HTONL(d)
49: # endif
50: # ifndef HTONS
51: # define HTONS(d)
52: # endif
53: #else
54: # ifndef NTOHL
55: # define NTOHL(d) ((d) = ntohl((d)))
56: # endif
57: # ifndef NTOHS
58: # define NTOHS(d) ((d) = ntohs((u_int16_t)(d)))
59: # endif
60: # ifndef HTONL
61: # define HTONL(d) ((d) = htonl((d)))
62: # endif
63: # ifndef HTONS
64: # define HTONS(d) ((d) = htons((u_int16_t)(d)))
65: # endif
66: #endif
67:
68: typedef u_int32_t n_long; /* long as received from the net */
69:
70: /*
71: * Definitions for internet protocol version 4.
72: * Per RFC 791, September 1981.
73: */
74: #define IPVERSION 4
75:
76: /*
77: * Structure of an internet header, naked of options.
78: */
79: struct ip {
80: #ifdef WORDS_BIGENDIAN
81: u_int ip_v:4, /* version */
82: ip_hl:4; /* header length */
83: #else
84: u_int ip_hl:4, /* header length */
85: ip_v:4; /* version */
86: #endif
87: u_int8_t ip_tos; /* type of service */
1.1.1.2 ! root 88: u_int16_t ip_len; /* total length */
1.1 root 89: u_int16_t ip_id; /* identification */
1.1.1.2 ! root 90: u_int16_t ip_off; /* fragment offset field */
1.1 root 91: #define IP_DF 0x4000 /* don't fragment flag */
92: #define IP_MF 0x2000 /* more fragments flag */
93: #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
94: u_int8_t ip_ttl; /* time to live */
95: u_int8_t ip_p; /* protocol */
96: u_int16_t ip_sum; /* checksum */
97: struct in_addr ip_src,ip_dst; /* source and dest address */
98: };
99:
100: #define IP_MAXPACKET 65535 /* maximum packet size */
101:
102: /*
103: * Definitions for IP type of service (ip_tos)
104: */
105: #define IPTOS_LOWDELAY 0x10
106: #define IPTOS_THROUGHPUT 0x08
107: #define IPTOS_RELIABILITY 0x04
108:
109: /*
110: * Definitions for options.
111: */
112: #define IPOPT_COPIED(o) ((o)&0x80)
113: #define IPOPT_CLASS(o) ((o)&0x60)
114: #define IPOPT_NUMBER(o) ((o)&0x1f)
115:
116: #define IPOPT_CONTROL 0x00
117: #define IPOPT_RESERVED1 0x20
118: #define IPOPT_DEBMEAS 0x40
119: #define IPOPT_RESERVED2 0x60
120:
121: #define IPOPT_EOL 0 /* end of option list */
122: #define IPOPT_NOP 1 /* no operation */
123:
124: #define IPOPT_RR 7 /* record packet route */
125: #define IPOPT_TS 68 /* timestamp */
126: #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
127: #define IPOPT_LSRR 131 /* loose source route */
128: #define IPOPT_SATID 136 /* satnet id */
129: #define IPOPT_SSRR 137 /* strict source route */
130:
131: /*
132: * Offsets to fields in options other than EOL and NOP.
133: */
134: #define IPOPT_OPTVAL 0 /* option ID */
135: #define IPOPT_OLEN 1 /* option length */
136: #define IPOPT_OFFSET 2 /* offset within option */
137: #define IPOPT_MINOFF 4 /* min value of above */
138:
139: /*
140: * Time stamp option structure.
141: */
142: struct ip_timestamp {
143: u_int8_t ipt_code; /* IPOPT_TS */
144: u_int8_t ipt_len; /* size of structure (variable) */
145: u_int8_t ipt_ptr; /* index of current entry */
146: #ifdef WORDS_BIGENDIAN
147: u_int ipt_oflw:4, /* overflow counter */
148: ipt_flg:4; /* flags, see below */
149: #else
150: u_int ipt_flg:4, /* flags, see below */
151: ipt_oflw:4; /* overflow counter */
152: #endif
153: union ipt_timestamp {
154: n_long ipt_time[1];
155: struct ipt_ta {
156: struct in_addr ipt_addr;
157: n_long ipt_time;
158: } ipt_ta[1];
159: } ipt_timestamp;
160: };
161:
162: /* flag bits for ipt_flg */
163: #define IPOPT_TS_TSONLY 0 /* timestamps only */
164: #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
165: #define IPOPT_TS_PRESPEC 3 /* specified modules only */
166:
167: /* bits for security (not byte swapped) */
168: #define IPOPT_SECUR_UNCLASS 0x0000
169: #define IPOPT_SECUR_CONFID 0xf135
170: #define IPOPT_SECUR_EFTO 0x789a
171: #define IPOPT_SECUR_MMMM 0xbc4d
172: #define IPOPT_SECUR_RESTR 0xaf13
173: #define IPOPT_SECUR_SECRET 0xd788
174: #define IPOPT_SECUR_TOPSECRET 0x6bc5
175:
176: /*
177: * Internet implementation parameters.
178: */
179: #define MAXTTL 255 /* maximum time to live (seconds) */
180: #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
181: #define IPFRAGTTL 60 /* time to live for frags, slowhz */
182: #define IPTTLDEC 1 /* subtracted when forwarding */
183:
184: #define IP_MSS 576 /* default maximum segment size */
185:
186: #ifdef HAVE_SYS_TYPES32_H /* Overcome some Solaris 2.x junk */
187: #include <sys/types32.h>
188: #else
189: #if SIZEOF_CHAR_P == 4
190: typedef caddr_t caddr32_t;
191: #else
192: typedef u_int32_t caddr32_t;
193: #endif
194: #endif
195:
196: #if SIZEOF_CHAR_P == 4
197: typedef struct ipq *ipqp_32;
198: typedef struct ipasfrag *ipasfragp_32;
199: #else
200: typedef caddr32_t ipqp_32;
201: typedef caddr32_t ipasfragp_32;
202: #endif
203:
204: /*
205: * Overlay for ip header used by other protocols (tcp, udp).
206: */
207: struct ipovly {
208: caddr32_t ih_next, ih_prev; /* for protocol sequence q's */
209: u_int8_t ih_x1; /* (unused) */
210: u_int8_t ih_pr; /* protocol */
1.1.1.2 ! root 211: u_int16_t ih_len; /* protocol length */
1.1 root 212: struct in_addr ih_src; /* source internet address */
213: struct in_addr ih_dst; /* destination internet address */
214: };
215:
216: /*
217: * Ip reassembly queue structure. Each fragment
218: * being reassembled is attached to one of these structures.
219: * They are timed out after ipq_ttl drops to 0, and may also
220: * be reclaimed if memory becomes tight.
221: * size 28 bytes
222: */
223: struct ipq {
224: ipqp_32 next,prev; /* to other reass headers */
225: u_int8_t ipq_ttl; /* time for reass q to live */
226: u_int8_t ipq_p; /* protocol of this fragment */
227: u_int16_t ipq_id; /* sequence id for reassembly */
228: ipasfragp_32 ipq_next,ipq_prev;
229: /* to ip headers of fragments */
230: struct in_addr ipq_src,ipq_dst;
231: };
232:
233: /*
234: * Ip header, when holding a fragment.
235: *
236: * Note: ipf_next must be at same offset as ipq_next above
237: */
238: struct ipasfrag {
239: #ifdef WORDS_BIGENDIAN
240: u_int ip_v:4,
241: ip_hl:4;
242: #else
243: u_int ip_hl:4,
244: ip_v:4;
245: #endif
246: /* BUG : u_int changed to u_int8_t.
247: * sizeof(u_int)==4 on linux 2.0
248: */
249: u_int8_t ipf_mff; /* XXX overlays ip_tos: use low bit
250: * to avoid destroying tos (PPPDTRuu);
251: * copied from (ip_off&IP_MF) */
1.1.1.2 ! root 252: u_int16_t ip_len;
1.1 root 253: u_int16_t ip_id;
1.1.1.2 ! root 254: u_int16_t ip_off;
1.1 root 255: u_int8_t ip_ttl;
256: u_int8_t ip_p;
257: u_int16_t ip_sum;
258: ipasfragp_32 ipf_next; /* next fragment */
259: ipasfragp_32 ipf_prev; /* previous fragment */
260: };
261:
262: /*
263: * Structure stored in mbuf in inpcb.ip_options
264: * and passed to ip_output when ip options are in use.
265: * The actual length of the options (including ipopt_dst)
266: * is in m_len.
267: */
268: #define MAX_IPOPTLEN 40
269:
270: struct ipoption {
271: struct in_addr ipopt_dst; /* first-hop dst if source routed */
272: int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
273: };
274:
275: /*
276: * Structure attached to inpcb.ip_moptions and
277: * passed to ip_output when IP multicast options are in use.
278: */
279:
280: struct ipstat {
281: u_long ips_total; /* total packets received */
282: u_long ips_badsum; /* checksum bad */
283: u_long ips_tooshort; /* packet too short */
284: u_long ips_toosmall; /* not enough data */
285: u_long ips_badhlen; /* ip header length < data size */
286: u_long ips_badlen; /* ip length < ip header length */
287: u_long ips_fragments; /* fragments received */
288: u_long ips_fragdropped; /* frags dropped (dups, out of space) */
289: u_long ips_fragtimeout; /* fragments timed out */
290: u_long ips_forward; /* packets forwarded */
291: u_long ips_cantforward; /* packets rcvd for unreachable dest */
292: u_long ips_redirectsent; /* packets forwarded on same net */
293: u_long ips_noproto; /* unknown or unsupported protocol */
294: u_long ips_delivered; /* datagrams delivered to upper level*/
295: u_long ips_localout; /* total ip packets generated here */
296: u_long ips_odropped; /* lost packets due to nobufs, etc. */
297: u_long ips_reassembled; /* total packets reassembled ok */
298: u_long ips_fragmented; /* datagrams successfully fragmented */
299: u_long ips_ofragments; /* output fragments created */
300: u_long ips_cantfrag; /* don't fragment flag was set, etc. */
301: u_long ips_badoptions; /* error in option processing */
302: u_long ips_noroute; /* packets discarded due to no route */
303: u_long ips_badvers; /* ip version != 4 */
304: u_long ips_rawout; /* total raw ip packets generated */
305: u_long ips_unaligned; /* times the ip packet was not aligned */
306: };
307:
308: extern struct ipstat ipstat;
309: extern struct ipq ipq; /* ip reass. queue */
310: extern u_int16_t ip_id; /* ip packet ctr, for ids */
311: extern int ip_defttl; /* default IP ttl */
312:
313: #endif
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