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1 | /*********************************************************** |
2 | Copyright IBM Corporation 1987 | |
3 | ||
4 | All Rights Reserved | |
5 | ||
6 | Permission to use, copy, modify, and distribute this software and its | |
7 | documentation for any purpose and without fee is hereby granted, | |
8 | provided that the above copyright notice appear in all copies and that | |
9 | both that copyright notice and this permission notice appear in | |
10 | supporting documentation, and that the name of IBM not be | |
11 | used in advertising or publicity pertaining to distribution of the | |
12 | software without specific, written prior permission. | |
13 | ||
14 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
15 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
16 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
17 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
18 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
19 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
20 | SOFTWARE. | |
21 | ||
22 | ******************************************************************/ | |
23 | ||
24 | /* | |
25 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
26 | */ | |
27 | /* $Header: clnp.h,v 4.3 88/09/12 13:34:40 hagens Exp $ */ | |
28 | /* $Source: /usr/argo/sys/netiso/RCS/clnp.h,v $ */ | |
e2069931 | 29 | /* @(#)clnp.h 7.2 (Berkeley) %G% */ |
d4b75c41 KS |
30 | |
31 | #ifndef BYTE_ORDER | |
32 | /* | |
33 | * Definitions for byte order, | |
34 | * according to byte significance from low address to high. | |
35 | */ | |
36 | #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ | |
37 | #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ | |
38 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ | |
39 | ||
40 | #ifdef vax | |
41 | #define BYTE_ORDER LITTLE_ENDIAN | |
42 | #else | |
43 | #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */ | |
44 | #endif | |
45 | #endif BYTE_ORDER | |
46 | ||
47 | /* | |
48 | * Return true if the mbuf is a cluster mbuf | |
49 | */ | |
e2069931 | 50 | #define IS_CLUSTER(m) ((m)->m_flags & M_EXT) |
d4b75c41 KS |
51 | |
52 | /* | |
53 | * Move the halfword into the two characters | |
54 | */ | |
55 | #define HTOC(msb, lsb, hword)\ | |
56 | (msb) = (u_char)((hword) >> 8);\ | |
57 | (lsb) = (u_char)((hword) & 0xff) | |
58 | /* | |
59 | * Move the two charcters into the halfword | |
60 | */ | |
61 | #define CTOH(msb, lsb, hword)\ | |
62 | (hword) = ((msb) << 8) | (lsb) | |
63 | ||
64 | /* | |
65 | * Return true if the checksum has been set - ie. the checksum is | |
66 | * not zero | |
67 | */ | |
68 | #define CKSUM_REQUIRED(clnp)\ | |
69 | (((clnp)->cnf_cksum_msb != 0) || ((clnp)->cnf_cksum_lsb != 0)) | |
70 | ||
71 | /* | |
72 | * Fixed part of clnp header | |
73 | */ | |
74 | struct clnp_fixed { | |
75 | u_char cnf_proto_id; /* network layer protocol identifier */ | |
76 | u_char cnf_hdr_len; /* length indicator (octets) */ | |
77 | u_char cnf_vers; /* version/protocol identifier extension */ | |
78 | u_char cnf_ttl; /* lifetime (500 milliseconds) */ | |
79 | #if BYTE_ORDER == LITTLE_ENDIAN | |
80 | u_char cnf_type:5, /* type code */ | |
81 | cnf_err_ok:1, /* flag: error report */ | |
82 | cnf_more_segs:1, /* flag: more segments */ | |
83 | cnf_seg_ok:1; /* flag: segmentation permitted */ | |
84 | #endif | |
85 | #if BYTE_ORDER == BIG_ENDIAN | |
86 | u_char cnf_seg_ok:1, /* flag: segmentation permitted */ | |
87 | cnf_more_segs:1, /* flag: more segments */ | |
88 | cnf_err_ok:1, /* flag: error report */ | |
89 | cnf_type:5; /* type code */ | |
90 | #endif | |
91 | u_char cnf_seglen_msb; /* pdu segment length (octets) high byte */ | |
92 | u_char cnf_seglen_lsb; /* pdu segment length (octets) low byte */ | |
93 | u_char cnf_cksum_msb; /* checksum high byte */ | |
94 | u_char cnf_cksum_lsb; /* checksum low byte */ | |
95 | }; | |
96 | #define CLNP_CKSUM_OFF 0x07 /* offset of checksum */ | |
97 | ||
98 | #define clnl_fixed clnp_fixed | |
99 | ||
100 | /* | |
101 | * Segmentation part of clnp header | |
102 | */ | |
103 | struct clnp_segment { | |
104 | u_short cng_id; /* data unit identifier */ | |
105 | u_short cng_off; /* segment offset */ | |
106 | u_short cng_tot_len; /* total length */ | |
107 | }; | |
108 | ||
109 | /* | |
110 | * Clnp fragment reassembly structures: | |
111 | * | |
112 | * All packets undergoing reassembly are linked together in | |
113 | * clnp_fragl structures. Each clnp_fragl structure contains a | |
114 | * pointer to the original clnp packet header, as well as a | |
115 | * list of packet fragments. Each packet fragment | |
116 | * is headed by a clnp_frag structure. This structure contains the | |
117 | * offset of the first and last byte of the fragment, as well as | |
118 | * a pointer to the data (an mbuf chain) of the fragment. | |
119 | */ | |
120 | ||
121 | /* | |
122 | * NOTE: | |
123 | * The clnp_frag structure is stored in an mbuf immedately preceeding | |
124 | * the fragment data. Since there are words in this struct, | |
125 | * it must be word aligned. | |
126 | * | |
127 | * NOTE: | |
128 | * All the fragment code assumes that the entire clnp header is | |
129 | * contained in the first mbuf. | |
130 | */ | |
131 | struct clnp_frag { | |
132 | u_int cfr_first; /* offset of first byte of this frag */ | |
133 | u_int cfr_last; /* offset of last byte of this frag */ | |
134 | u_int cfr_bytes; /* bytes to shave to get to data */ | |
135 | struct mbuf *cfr_data; /* ptr to data for this frag */ | |
136 | struct clnp_frag *cfr_next; /* next fragment in list */ | |
137 | }; | |
138 | ||
139 | struct clnp_fragl { | |
140 | struct iso_addr cfl_src; /* source of the pkt */ | |
141 | struct iso_addr cfl_dst; /* destination of the pkt */ | |
142 | u_short cfl_id; /* id of the pkt */ | |
143 | u_char cfl_ttl; /* current ttl of pkt */ | |
144 | u_short cfl_last; /* offset of last byte of packet */ | |
145 | struct mbuf *cfl_orighdr; /* ptr to original header */ | |
146 | struct clnp_frag *cfl_frags; /* linked list of fragments for pkt */ | |
147 | struct clnp_fragl *cfl_next; /* next pkt being reassembled */ | |
148 | }; | |
149 | ||
150 | /* | |
151 | * The following structure is used to index into an options section | |
152 | * of a clnp datagram. These values can be used without worry that | |
153 | * offset or length fields are invalid or too big, etc. That is, | |
154 | * the consistancy of the options will be guaranteed before this | |
155 | * structure is filled in. Any pointer (field ending in p) is | |
156 | * actually the offset from the beginning of the mbuf the option | |
157 | * is contained in. A value of NULL for any pointer | |
158 | * means that the option is not present. The length any option | |
159 | * does not include the option code or option length fields. | |
160 | */ | |
161 | struct clnp_optidx { | |
162 | u_short cni_securep; /* ptr to beginning of security option */ | |
163 | char cni_secure_len; /* length of entire security option */ | |
164 | ||
165 | u_short cni_srcrt_s; /* offset of start of src rt option */ | |
166 | u_short cni_srcrt_len; /* length of entire src rt option */ | |
167 | ||
168 | u_short cni_recrtp; /* ptr to beginning of recrt option */ | |
169 | char cni_recrt_len; /* length of entire recrt option */ | |
170 | ||
171 | char cni_priorp; /* ptr to priority option */ | |
172 | ||
173 | u_short cni_qos_formatp; /* ptr to format of qos option */ | |
174 | char cni_qos_len; /* length of entire qos option */ | |
175 | ||
176 | u_char cni_er_reason; /* reason from ER pdu option */ | |
177 | }; | |
178 | ||
179 | #define ER_INVALREAS 0xff /* code for invalid ER pdu discard reason */ | |
180 | ||
181 | /* return true iff src route is valid */ | |
182 | #define CLNPSRCRT_VALID(oidx)\ | |
183 | ((oidx) && (oidx->cni_srcrt_s)) | |
184 | ||
185 | /* return the offset field of the src rt */ | |
186 | #define CLNPSRCRT_OFF(oidx, options)\ | |
187 | (*((u_char *)((caddr_t)options + oidx->cni_srcrt_s + 1))) | |
188 | ||
189 | /* return the type field of the src rt */ | |
190 | #define CLNPSRCRT_TYPE(oidx, options)\ | |
191 | ((u_char)(*((caddr_t)options + oidx->cni_srcrt_s))) | |
192 | ||
193 | /* return the length of the current address */ | |
194 | #define CLNPSRCRT_CLEN(oidx, options)\ | |
195 | ((u_char)(*((caddr_t)options + oidx->cni_srcrt_s + CLNPSRCRT_OFF(oidx, options) - 1))) | |
196 | ||
197 | /* return the address of the current address */ | |
198 | #define CLNPSRCRT_CADDR(oidx, options)\ | |
199 | ((caddr_t)((caddr_t)options + oidx->cni_srcrt_s + CLNPSRCRT_OFF(oidx, options))) | |
200 | ||
201 | /* | |
202 | * return true if the src route has run out of routes | |
203 | * this is true if the offset of next route is greater than the end of the rt | |
204 | */ | |
205 | #define CLNPSRCRT_TERM(oidx, options)\ | |
206 | (CLNPSRCRT_OFF(oidx, options) > oidx->cni_srcrt_len) | |
207 | ||
208 | /* | |
209 | * Options a user can set/get | |
210 | */ | |
211 | #define CLNPOPT_FLAGS 0x01 /* flags: seg permitted, no er xmit, etc */ | |
212 | #define CLNPOPT_OPTS 0x02 /* datagram options */ | |
213 | ||
214 | /* | |
215 | * Values for particular datagram options | |
216 | */ | |
217 | #define CLNPOVAL_PAD 0xcc /* padding */ | |
218 | #define CLNPOVAL_SECURE 0xc5 /* security */ | |
219 | #define CLNPOVAL_SRCRT 0xc8 /* source routing */ | |
220 | #define CLNPOVAL_RECRT 0xcb /* record route */ | |
221 | #define CLNPOVAL_QOS 0xc3 /* quality of service */ | |
222 | #define CLNPOVAL_PRIOR 0xcd /* priority */ | |
223 | #define CLNPOVAL_ERREAS 0xc1 /* ER PDU ONLY: reason for discard */ | |
224 | ||
225 | #define CLNPOVAL_SRCSPEC 0x40 /* source address specific */ | |
226 | #define CLNPOVAL_DSTSPEC 0x80 /* destination address specific */ | |
227 | #define CLNPOVAL_GLOBAL 0xc0 /* globally unique */ | |
228 | ||
229 | #define CLNPOVAL_PARTRT 0x00 /* partial source routing */ | |
230 | #define CLNPOVAL_COMPRT 0x01 /* complete source routing */ | |
231 | ||
232 | /* | |
233 | * Clnp flags used in a control block flags field. | |
234 | * NOTE: these must be out of the range of bits defined in ../net/raw_cb.h | |
235 | */ | |
236 | #define CLNP_NO_SEG 0x010 /* segmentation not permitted */ | |
237 | #define CLNP_NO_ER 0x020 /* do not generate ERs */ | |
238 | #define CLNP_SEND_RAW 0x080 /* send pkt as RAW DT rather than TP DT */ | |
239 | #define CLNP_NO_CKSUM 0x100 /* don't use clnp checksum */ | |
240 | #define CLNP_ECHO 0x200 /* fake echo function */ | |
241 | #define CLNP_NOCACHE 0x400 /* don't store cache information */ | |
242 | ||
243 | /* valid clnp flags */ | |
244 | #define CLNP_VFLAGS (CLNP_SEND_RAW|CLNP_NO_SEG|CLNP_NO_ER|CLNP_NO_CKSUM\ | |
245 | |CLNP_ECHO|CLNP_NOCACHE) | |
246 | ||
247 | /* | |
248 | * Constants used by clnp | |
249 | */ | |
250 | #define CLNP_HDR_MIN (sizeof (struct clnp_fixed)) | |
251 | #define CLNP_HDR_MAX (254) | |
252 | #define CLNP_TTL_UNITS 2 /* 500 milliseconds */ | |
253 | #define CLNP_TTL 15*CLNP_TTL_UNITS /* time to live (seconds) */ | |
254 | #define ISO8473_V1 0x01 | |
255 | ||
256 | /* | |
257 | * Clnp packet types | |
258 | * In order to test raw clnp and tp/clnp simultaneously, a third type of | |
259 | * packet has been defined: CLNP_RAW. This is done so that the input | |
260 | * routine can switch to the correct input routine (rclnp_input or | |
261 | * tpclnp_input) based on the type field. If clnp had a higher level protocol | |
262 | * field, this would not be necessary. | |
263 | */ | |
264 | #define CLNP_DT 0x1C /* normal data */ | |
265 | #define CLNP_ER 0x01 /* error report */ | |
266 | #define CLNP_RAW 0x1D /* debug only */ | |
267 | #define CLNP_EC 0x1E /* echo packet */ | |
268 | #define CLNP_ECR 0x1F /* echo reply */ | |
269 | ||
270 | /* | |
271 | * ER pdu error codes | |
272 | */ | |
273 | #define GEN_NOREAS 0x00 /* reason not specified */ | |
274 | #define GEN_PROTOERR 0x01 /* protocol procedure error */ | |
275 | #define GEN_BADCSUM 0x02 /* incorrect checksum */ | |
276 | #define GEN_CONGEST 0x03 /* pdu discarded due to congestion */ | |
277 | #define GEN_HDRSYNTAX 0x04 /* header syntax error */ | |
278 | #define GEN_SEGNEEDED 0x05 /* segmentation needed, but not permitted */ | |
279 | #define GEN_INCOMPLETE 0x06 /* incomplete pdu received */ | |
280 | #define GEN_DUPOPT 0x07 /* duplicate option */ | |
281 | ||
282 | /* address errors */ | |
283 | #define ADDR_DESTUNREACH 0x80 /* destination address unreachable */ | |
284 | #define ADDR_DESTUNKNOWN 0x81 /* destination address unknown */ | |
285 | ||
286 | /* source routing */ | |
287 | #define SRCRT_UNSPECERR 0x90 /* unspecified src rt error */ | |
288 | #define SRCRT_SYNTAX 0x91 /* syntax error in src rt field */ | |
289 | #define SRCRT_UNKNOWNADDR 0x92 /* unknown addr in src rt field */ | |
290 | #define SRCRT_BADPATH 0x93 /* path not acceptable */ | |
291 | ||
292 | /* lifetime */ | |
293 | #define TTL_EXPTRANSIT 0xa0 /* lifetime expired during transit */ | |
294 | #define TTL_EXPREASS 0xa1 /* lifetime expired during reassembly */ | |
295 | ||
296 | /* pdu discarded */ | |
297 | #define DISC_UNSUPPOPT 0xb0 /* unsupported option not specified? */ | |
298 | #define DISC_UNSUPPVERS 0xb1 /* unsupported protocol version */ | |
299 | #define DISC_UNSUPPSECURE 0xb2 /* unsupported security option */ | |
300 | #define DISC_UNSUPPSRCRT 0xb3 /* unsupported src rt option */ | |
301 | #define DISC_UNSUPPRECRT 0xb4 /* unsupported rec rt option */ | |
302 | ||
303 | /* reassembly */ | |
304 | #define REASS_INTERFERE 0xc0 /* reassembly interference */ | |
305 | ||
306 | #ifdef TROLL | |
307 | ||
308 | #define TR_DUPEND 0x01 /* duplicate end of fragment */ | |
309 | #define TR_DUPPKT 0x02 /* duplicate entire packet */ | |
310 | #define TR_DROPPKT 0x04 /* drop packet on output */ | |
311 | #define TR_TRIM 0x08 /* trim bytes from packet */ | |
312 | #define TR_CHANGE 0x10 /* change bytes in packet */ | |
313 | #define TR_MTU 0x20 /* delta to change device mtu */ | |
314 | #define TR_CHUCK 0x40 /* drop packet in rclnp_input */ | |
315 | #define TR_BLAST 0x80 /* force rclnp_output to blast many packet */ | |
316 | #define TR_RAWLOOP 0x100 /* make if_loop call clnpintr directly */ | |
317 | struct troll { | |
318 | int tr_ops; /* operations to perform */ | |
319 | float tr_dup_size; /* % to duplicate */ | |
320 | float tr_dup_freq; /* frequency to duplicate packets */ | |
321 | float tr_drop_freq; /* frequence to drop packets */ | |
322 | int tr_mtu_adj; /* delta to adjust if mtu */ | |
323 | int tr_blast_cnt; /* # of pkts to blast out */ | |
324 | }; | |
325 | ||
326 | #define SN_OUTPUT(clcp, m)\ | |
327 | troll_output(clcp->clc_ifp, m, clcp->clc_firsthop) | |
328 | ||
329 | #define SN_MTU(ifp)\ | |
330 | (ifp->if_mtu - trollctl.tr_mtu_adj) | |
331 | ||
332 | #else /* NO TROLL */ | |
333 | ||
334 | #define SN_OUTPUT(clcp, m)\ | |
335 | (*clcp->clc_ifp->if_output)(clcp->clc_ifp, m, clcp->clc_firsthop) | |
336 | ||
337 | #define SN_MTU(ifp)\ | |
338 | (ifp->if_mtu) | |
339 | ||
340 | #endif TROLL | |
341 | ||
342 | /* | |
343 | * Macro to remove an address from a clnp header | |
344 | */ | |
345 | #define CLNP_EXTRACT_ADDR(isoa, hoff, hend)\ | |
346 | {\ | |
347 | isoa.isoa_len = (u_char)*hoff;\ | |
348 | if ((((++hoff) + isoa.isoa_len) > hend) ||\ | |
349 | (isoa.isoa_len > 20) || (isoa.isoa_len == 0)) {\ | |
350 | hoff = (caddr_t)0;\ | |
351 | } else {\ | |
352 | (void) bcopy(hoff, (caddr_t)&isoa, isoa.isoa_len);\ | |
353 | hoff += isoa.isoa_len;\ | |
354 | }\ | |
355 | } | |
356 | ||
357 | /* | |
358 | * Macro to insert an address into a clnp header | |
359 | */ | |
360 | #define CLNP_INSERT_ADDR(hoff, isoap)\ | |
361 | *hoff++ = (isoap)->isoa_len;\ | |
362 | (void) bcopy((caddr_t)(isoap), hoff, (isoap)->isoa_len);\ | |
363 | hoff += (isoap)->isoa_len; | |
364 | ||
365 | /* | |
366 | * Clnp hdr cache. Whenever a clnp packet is sent, a copy of the | |
367 | * header is made and kept in this cache. In addition to a copy of | |
368 | * the cached clnp hdr, the cache contains | |
369 | * information necessary to determine whether the new packet | |
370 | * to send requires a new header to be built. | |
371 | */ | |
372 | struct clnp_cache { | |
373 | /* these fields are used to check the validity of the cache */ | |
374 | struct iso_addr clc_dst; /* destination of packet */ | |
375 | struct mbuf *clc_options; /* ptr to options mbuf */ | |
376 | int clc_flags; /* flags passed to clnp_output */ | |
377 | ||
378 | /* these fields are state that clnp_output requires to finish the pkt */ | |
379 | int clc_segoff; /* offset of seg part of header */ | |
380 | struct sockaddr *clc_firsthop; /* first hop of packet (points into | |
381 | the route structure) */ | |
382 | struct ifnet *clc_ifp; /* ptr to interface (points into | |
383 | the route structure) */ | |
384 | struct mbuf *clc_hdr; /* cached pkt hdr (finally)! */ | |
385 | }; | |
386 | ||
387 | #ifndef satosiso | |
388 | #define satosiso(sa)\ | |
389 | ((struct sockaddr_iso *)(sa)) | |
390 | #endif | |
391 | ||
392 | #ifdef KERNEL | |
393 | caddr_t clnp_insert_addr(); | |
394 | struct iso_addr *clnp_srcaddr(); | |
395 | struct mbuf *clnp_reass(); | |
396 | #ifdef TROLL | |
397 | struct troll trollctl; | |
398 | #endif TROLL | |
399 | #endif KERNEL |