![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ip.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Previous NeXT emulator] / previous / src / slirp|
Return to ip.h CVS log | Up to [Previous NeXT emulator] / previous / src / slirp |
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. 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 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((u_int16_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((u_int16_t)(d)))
61: # endif
62: #endif
63:
64: typedef u_int32_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: #ifdef PRAGMA_PACK_SUPPORTED
76: #pragma pack(1)
77: #endif
78:
79: struct ip {
80: #ifdef WORDS_BIGENDIAN
81: u_char ip_v:4, /* version */
82: ip_hl:4; /* header length */
83: #else
84: u_char ip_hl:4, /* header length */
85: ip_v:4; /* version */
86: #endif
87: u_int8_t ip_tos; /* type of service */
88: u_int16_t ip_len; /* total length */
89: u_int16_t ip_id; /* identification */
90: u_int16_t ip_off; /* fragment offset field */
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: } PACKED__;
99:
100: #ifdef PRAGMA_PACK_SUPPORTED
1.1.1.2 ! root 101: #pragma pack(PACK_RESET)
1.1 root 102: #endif
103:
104: #define IP_MAXPACKET 65535 /* maximum packet size */
105:
106: /*
107: * Definitions for IP type of service (ip_tos)
108: */
109: #define IPTOS_LOWDELAY 0x10
110: #define IPTOS_THROUGHPUT 0x08
111: #define IPTOS_RELIABILITY 0x04
112:
113: /*
114: * Definitions for options.
115: */
116: #define IPOPT_COPIED(o) ((o)&0x80)
117: #define IPOPT_CLASS(o) ((o)&0x60)
118: #define IPOPT_NUMBER(o) ((o)&0x1f)
119:
120: #define IPOPT_CONTROL 0x00
121: #define IPOPT_RESERVED1 0x20
122: #define IPOPT_DEBMEAS 0x40
123: #define IPOPT_RESERVED2 0x60
124:
125: #define IPOPT_EOL 0 /* end of option list */
126: #define IPOPT_NOP 1 /* no operation */
127:
128: #define IPOPT_RR 7 /* record packet route */
129: #define IPOPT_TS 68 /* timestamp */
130: #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
131: #define IPOPT_LSRR 131 /* loose source route */
132: #define IPOPT_SATID 136 /* satnet id */
133: #define IPOPT_SSRR 137 /* strict source route */
134:
135: /*
136: * Offsets to fields in options other than EOL and NOP.
137: */
138: #define IPOPT_OPTVAL 0 /* option ID */
139: #define IPOPT_OLEN 1 /* option length */
140: #define IPOPT_OFFSET 2 /* offset within option */
141: #define IPOPT_MINOFF 4 /* min value of above */
142:
143: /*
144: * Time stamp option structure.
145: */
146: #ifdef PRAGMA_PACK_SUPPORTED
147: #pragma pack(1)
148: #endif
149:
150: struct ip_timestamp {
151: u_int8_t ipt_code; /* IPOPT_TS */
152: u_int8_t ipt_len; /* size of structure (variable) */
153: u_int8_t ipt_ptr; /* index of current entry */
154: #ifdef WORDS_BIGENDIAN
155: u_char ipt_oflw:4, /* overflow counter */
156: ipt_flg:4; /* flags, see below */
157: #else
158: u_char ipt_flg:4, /* flags, see below */
159: ipt_oflw:4; /* overflow counter */
160: #endif
161: union ipt_timestamp {
162: n_long ipt_time[1];
163: struct ipt_ta {
164: struct in_addr ipt_addr;
165: n_long ipt_time;
166: } ipt_ta[1];
167: } ipt_timestamp;
168: } PACKED__;
169:
170: #ifdef PRAGMA_PACK_SUPPORTED
1.1.1.2 ! root 171: #pragma pack(PACK_RESET)
1.1 root 172: #endif
173:
174: /* flag bits for ipt_flg */
175: #define IPOPT_TS_TSONLY 0 /* timestamps only */
176: #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
177: #define IPOPT_TS_PRESPEC 3 /* specified modules only */
178:
179: /* bits for security (not byte swapped) */
180: #define IPOPT_SECUR_UNCLASS 0x0000
181: #define IPOPT_SECUR_CONFID 0xf135
182: #define IPOPT_SECUR_EFTO 0x789a
183: #define IPOPT_SECUR_MMMM 0xbc4d
184: #define IPOPT_SECUR_RESTR 0xaf13
185: #define IPOPT_SECUR_SECRET 0xd788
186: #define IPOPT_SECUR_TOPSECRET 0x6bc5
187:
188: /*
189: * Internet implementation parameters.
190: */
191: #define MAXTTL 255 /* maximum time to live (seconds) */
192: #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
193: #define IPFRAGTTL 60 /* time to live for frags, slowhz */
194: #define IPTTLDEC 1 /* subtracted when forwarding */
195:
196: #define IP_MSS 576 /* default maximum segment size */
197:
198: #if SIZEOF_CHAR_P == 4
199: struct mbuf_ptr {
200: struct mbuf *mptr;
201: uint32_t dummy;
202: };
203: #else
204: struct mbuf_ptr {
205: struct mbuf *mptr;
206: };
207: #endif
208: struct qlink {
209: void *next, *prev;
210: };
211:
212: /*
213: * Overlay for ip header used by other protocols (tcp, udp).
214: */
215: #ifdef PRAGMA_PACK_SUPPORTED
216: #pragma pack(1)
217: #endif
218:
219: struct ipovly {
220: struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */
221: u_int8_t ih_x1; /* (unused) */
222: u_int8_t ih_pr; /* protocol */
223: u_int16_t ih_len; /* protocol length */
224: struct in_addr ih_src; /* source internet address */
225: struct in_addr ih_dst; /* destination internet address */
226: } __attribute__((packed));
227:
228: #ifdef PRAGMA_PACK_SUPPORTED
1.1.1.2 ! root 229: #pragma pack(PACK_RESET)
1.1 root 230: #endif
231:
232: /*
233: * Ip reassembly queue structure. Each fragment
234: * being reassembled is attached to one of these structures.
235: * They are timed out after ipq_ttl drops to 0, and may also
236: * be reclaimed if memory becomes tight.
237: * size 28 bytes
238: */
239: struct ipq {
240: struct qlink frag_link; /* to ip headers of fragments */
241: struct qlink ip_link; /* to other reass headers */
242:
243: u_int8_t ipq_ttl; /* time for reass q to live */
244: u_int8_t ipq_p; /* protocol of this fragment */
245: u_int16_t ipq_id; /* sequence id for reassembly */
246:
247: struct in_addr ipq_src,ipq_dst;
248: };
249:
250: /*
251: * Ip header, when holding a fragment.
252: *
253: * Note: ipf_next must be at same offset as ipq_next above
254: */
255: struct ipasfrag {
256: struct qlink ipf_link;
257: struct ip ipf_ip;
258: };
259:
260: #define ipf_off ipf_ip.ip_off
261: #define ipf_tos ipf_ip.ip_tos
262: #define ipf_len ipf_ip.ip_len
263: #define ipf_next ipf_link.next
264: #define ipf_prev ipf_link.prev
265:
266: /*
267: * Structure stored in mbuf in inpcb.ip_options
268: * and passed to ip_output when ip options are in use.
269: * The actual length of the options (including ipopt_dst)
270: * is in m_len.
271: */
272: #define MAX_IPOPTLEN 40
273:
274: struct ipoption {
275: struct in_addr ipopt_dst; /* first-hop dst if source routed */
276: int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
277: };
278:
279: /*
280: * Structure attached to inpcb.ip_moptions and
281: * passed to ip_output when IP multicast options are in use.
282: */
283:
284: struct ipstat {
285: u_long ips_total; /* total packets received */
286: u_long ips_badsum; /* checksum bad */
287: u_long ips_tooshort; /* packet too short */
288: u_long ips_toosmall; /* not enough data */
289: u_long ips_badhlen; /* ip header length < data size */
290: u_long ips_badlen; /* ip length < ip header length */
291: u_long ips_fragments; /* fragments received */
292: u_long ips_fragdropped; /* frags dropped (dups, out of space) */
293: u_long ips_fragtimeout; /* fragments timed out */
294: u_long ips_forward; /* packets forwarded */
295: u_long ips_cantforward; /* packets rcvd for unreachable dest */
296: u_long ips_redirectsent; /* packets forwarded on same net */
297: u_long ips_noproto; /* unknown or unsupported protocol */
298: u_long ips_delivered; /* datagrams delivered to upper level*/
299: u_long ips_localout; /* total ip packets generated here */
300: u_long ips_odropped; /* lost packets due to nobufs, etc. */
301: u_long ips_reassembled; /* total packets reassembled ok */
302: u_long ips_fragmented; /* datagrams successfully fragmented */
303: u_long ips_ofragments; /* output fragments created */
304: u_long ips_cantfrag; /* don't fragment flag was set, etc. */
305: u_long ips_badoptions; /* error in option processing */
306: u_long ips_noroute; /* packets discarded due to no route */
307: u_long ips_badvers; /* ip version != 4 */
308: u_long ips_rawout; /* total raw ip packets generated */
309: u_long ips_unaligned; /* times the ip packet was not aligned */
310: };
311:
312: extern struct ipstat ipstat;
313: extern struct ipq ipq; /* ip reass. queue */
314: extern u_int16_t ip_id; /* ip packet ctr, for ids */
315: extern int ip_defttl; /* default IP ttl */
316:
317: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.