e576be50 |
1 | /* |
2 | * internal.h |
3 | * - declarations of private objects with external linkage (adns__*) |
4 | * - definitons of internal macros |
5 | * - comments regarding library data structures |
6 | */ |
7 | /* |
8 | * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License as published by |
12 | * the Free Software Foundation; either version 2, or (at your option) |
13 | * any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | * GNU General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program; if not, write to the Free Software Foundation, |
22 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
23 | */ |
37e28fde |
24 | |
25 | #ifndef ADNS_INTERNAL_H_INCLUDED |
26 | #define ADNS_INTERNAL_H_INCLUDED |
27 | |
4353a5c4 |
28 | #define PRINTFFORMAT(a,b) __attribute__((format(printf,a,b))) |
29 | typedef unsigned char byte; |
30 | |
31 | #include <stdarg.h> |
32 | #include <assert.h> |
33 | #include <unistd.h> |
34 | |
37e28fde |
35 | #include <sys/time.h> |
36 | |
37 | #include "adns.h" |
38 | |
39 | /* Configuration and constants */ |
40 | |
41 | #define MAXSERVERS 5 |
b9de380c |
42 | #define UDPMAXRETRIES /*15*/5 |
37e28fde |
43 | #define UDPRETRYMS 2000 |
44 | #define TCPMS 30000 |
45 | #define LOCALRESOURCEMS 20 |
b9de380c |
46 | |
98a3f706 |
47 | #define DNS_PORT 53 |
b9de380c |
48 | #define DNS_MAXUDP 512 |
49 | #define DNS_MAXDOMAIN 255 |
50 | #define DNS_HDRSIZE 12 |
51 | #define DNS_CLASS_IN 1 |
37e28fde |
52 | |
98a3f706 |
53 | typedef enum { |
54 | rcode_noerror, |
55 | rcode_formaterror, |
56 | rcode_servfail, |
57 | rcode_nxdomain, |
58 | rcode_notimp, |
59 | rcode_refused |
60 | } dns_rcode; |
61 | |
37e28fde |
62 | /* Shared data structures */ |
63 | |
4353a5c4 |
64 | typedef union { |
37e28fde |
65 | adns_status status; |
66 | char *cp; |
67 | adns_rrtype type; |
4353a5c4 |
68 | int i; |
37e28fde |
69 | struct in_addr ia; |
70 | unsigned long ul; |
4353a5c4 |
71 | } rr_align; |
72 | |
73 | typedef struct { |
74 | int used, avail; |
75 | byte *buf; |
76 | } vbuf; |
77 | |
78 | typedef union { |
79 | void *ext; |
80 | int dmaddr_index; |
81 | } qcontext; |
37e28fde |
82 | |
0ba0614a |
83 | typedef struct { |
0ba0614a |
84 | adns_rrtype type; |
86e7b8d9 |
85 | const char *rrtname; |
86 | const char *fmtname; |
98a3f706 |
87 | int rrsz; |
8e5b0abb |
88 | |
86e7b8d9 |
89 | void (*makefinal)(adns_query qu, void *data); |
90 | /* Change memory management of *data. |
91 | * Previously, used alloc_interim, now use alloc_final. |
92 | */ |
93 | |
94 | adns_status (*convstring)(vbuf *vb, const void *data); |
95 | /* Converts the RR data to a string representation in vbuf. |
96 | * vbuf will be appended to (it must have been initialised), |
97 | * and will not be null-terminated by convstring. |
98 | */ |
99 | |
3955725c |
100 | adns_status (*parse)(adns_query qu, int serv, |
31144a72 |
101 | const byte *dgram, int dglen, int cbyte, int max, |
102 | void *store_r); |
103 | /* Parse one RR, in dgram of length dglen, starting at cbyte and |
104 | * extending until at most max. |
105 | * |
106 | * The RR should be stored at *store_r, of length qu->typei->rrsz. |
107 | * |
108 | * If there is an overrun which might indicate truncation, it should set |
109 | * *rdstart to -1; otherwise it may set it to anything else positive. |
8e5b0abb |
110 | */ |
e062dcae |
111 | |
112 | int (*diff_needswap)(const void *datap_a, const void *datap_b); |
113 | /* Returns >0 if RR a should be strictly after RR b in the sort order, |
114 | * 0 otherwise. Must not fail. |
115 | */ |
0ba0614a |
116 | } typeinfo; |
117 | |
8e5b0abb |
118 | typedef struct allocnode { |
119 | struct allocnode *next; |
120 | } allocnode; |
121 | |
122 | union maxalign { |
123 | byte d[1]; |
124 | struct in_addr ia; |
125 | long l; |
126 | void *p; |
127 | void (*fp)(void); |
128 | union maxalign *up; |
129 | } data; |
130 | |
37e28fde |
131 | struct adns__query { |
3955725c |
132 | adns_state ads; |
ddfda861 |
133 | enum { query_udp, query_tcpwait, query_tcpsent, query_child, query_done } state; |
4353a5c4 |
134 | adns_query back, next, parent; |
37e28fde |
135 | struct { adns_query head, tail; } children; |
136 | struct { adns_query back, next; } siblings; |
8e5b0abb |
137 | struct allocnode *allocations; |
68442019 |
138 | int interim_allocd; |
139 | void *final_allocspace; |
0ba0614a |
140 | |
141 | const typeinfo *typei; |
e062dcae |
142 | byte *query_dgram; |
8e5b0abb |
143 | int query_dglen; |
31144a72 |
144 | |
8e5b0abb |
145 | vbuf vb; |
146 | /* General-purpose messing-about buffer. |
147 | * Wherever a `big' interface is crossed, this may be corrupted/changed |
148 | * unless otherwise specified. |
149 | */ |
150 | |
151 | adns_answer *answer; |
152 | /* This is allocated when a query is submitted, to avoid being unable |
153 | * to relate errors to queries if we run out of memory. During |
154 | * query processing status, rrs is 0. cname is set if |
155 | * we found a cname (this corresponds to cname_dgram in the query |
156 | * structure). type is set from the word go. nrrs and rrs |
157 | * are set together, when we find how many rrs there are. |
158 | */ |
31144a72 |
159 | |
31144a72 |
160 | byte *cname_dgram; |
161 | int cname_dglen, cname_begin; |
3955725c |
162 | /* If non-0, has been allocated using . */ |
31144a72 |
163 | |
ddfda861 |
164 | int id, flags, udpretries; |
4353a5c4 |
165 | int udpnextserver; |
166 | unsigned long udpsent, tcpfailed; /* bitmap indexed by server */ |
37e28fde |
167 | struct timeval timeout; |
4353a5c4 |
168 | qcontext context; |
ddfda861 |
169 | |
37e28fde |
170 | /* Possible states: |
ddfda861 |
171 | * |
8e5b0abb |
172 | * state Queue child id nextudpserver sentudp failedtcp |
173 | * |
174 | * udp NONE null >=0 0 zero zero |
175 | * udp timew null >=0 any nonzero zero |
176 | * udp NONE null >=0 any nonzero zero |
177 | * |
178 | * tcpwait timew null >=0 irrelevant zero any |
179 | * tcpsent timew null >=0 irrelevant zero any |
180 | * |
181 | * child childw set >=0 irrelevant irrelevant irrelevant |
182 | * done output null -1 irrelevant irrelevant irrelevant |
ddfda861 |
183 | * |
184 | * +------------------------+ |
185 | * START -----> | udp/NONE | |
186 | * +------------------------+ |
187 | * / |\ \ |
188 | * too big for UDP / UDP timeout \ \ send via UDP |
189 | * do this ASAP! / more retries \ \ do this ASAP! |
190 | * |_ desired \ _| |
191 | * +---------------+ +-----------+ |
192 | * | tcpwait/timew | ____ | udp/timew | |
193 | * +---------------+ \ +-----------+ |
194 | * | ^ | | | |
195 | * TCP conn'd; | | TCP died | | | |
196 | * send via TCP | | more | UDP timeout | | |
197 | * do this ASAP! | | servers | no more | | |
198 | * v | to try | retries | | |
199 | * +---------------+ | desired | | |
200 | * | tcpsent/timew | ____ | | | |
201 | * +---------------+ \| | | |
202 | * \ \ TCP died | TCP | | |
203 | * \ \ no more | timeout / | |
204 | * \ \ servers | / | |
205 | * \ \ to try | / | |
206 | * got \ \ v |_ / got |
207 | * reply \ _| +------------------+ / reply |
208 | * \ | done/output FAIL | / |
209 | * \ +------------------+ / |
210 | * \ / |
211 | * _| |_ |
212 | * (..... got reply ....) |
213 | * / \ |
214 | * need child query/ies / \ no child query |
215 | * / \ |
216 | * |_ _| |
217 | * +--------------+ +----------------+ |
218 | * | child/childw | ----------------> | done/output OK | |
219 | * +--------------+ children done +----------------+ |
37e28fde |
220 | */ |
221 | }; |
222 | |
37e28fde |
223 | struct adns__state { |
37e28fde |
224 | adns_initflags iflags; |
225 | FILE *diagfile; |
ddfda861 |
226 | struct { adns_query head, tail; } timew, childw, output; |
4353a5c4 |
227 | int nextid, udpsocket, tcpsocket; |
8e5b0abb |
228 | vbuf tcpsend, tcprecv; |
37e28fde |
229 | int nservers, tcpserver; |
8402e34c |
230 | enum adns__tcpstate { server_disconnected, server_connecting, server_ok } tcpstate; |
37e28fde |
231 | struct timeval tcptimeout; |
232 | struct server { |
233 | struct in_addr addr; |
234 | } servers[MAXSERVERS]; |
235 | }; |
236 | |
237 | /* From setup.c: */ |
238 | |
e576be50 |
239 | int adns__setnonblock(adns_state ads, int fd); /* => errno value */ |
240 | |
241 | /* From general.c: */ |
242 | |
4353a5c4 |
243 | void adns__vdiag(adns_state ads, const char *pfx, adns_initflags prevent, |
68442019 |
244 | int serv, adns_query qu, const char *fmt, va_list al); |
31144a72 |
245 | |
246 | void adns__debug(adns_state ads, int serv, adns_query qu, |
68442019 |
247 | const char *fmt, ...) PRINTFFORMAT(4,5); |
31144a72 |
248 | void adns__warn(adns_state ads, int serv, adns_query qu, |
68442019 |
249 | const char *fmt, ...) PRINTFFORMAT(4,5); |
31144a72 |
250 | void adns__diag(adns_state ads, int serv, adns_query qu, |
68442019 |
251 | const char *fmt, ...) PRINTFFORMAT(4,5); |
37e28fde |
252 | |
4353a5c4 |
253 | int adns__vbuf_ensure(vbuf *vb, int want); |
9557e604 |
254 | int adns__vbuf_appendstr(vbuf *vb, const char *data); /* does not include nul */ |
4353a5c4 |
255 | int adns__vbuf_append(vbuf *vb, const byte *data, int len); |
ddfda861 |
256 | /* 1=>success, 0=>realloc failed */ |
4353a5c4 |
257 | void adns__vbuf_appendq(vbuf *vb, const byte *data, int len); |
258 | void adns__vbuf_init(vbuf *vb); |
8e5b0abb |
259 | void adns__vbuf_free(vbuf *vb); |
4353a5c4 |
260 | |
e576be50 |
261 | const char *adns__diag_domain(adns_state ads, int serv, adns_query qu, vbuf *vb, |
262 | int flags, const byte *dgram, int dglen, int cbyte); |
263 | /* Unpicks a domain in a datagram and returns a string suitable for |
264 | * printing it as. Never fails - if an error occurs, it will |
265 | * return some kind of string describing the error. |
266 | * |
3955725c |
267 | * serv may be -1 and qu may be 0. vb must have been initialised, |
e576be50 |
268 | * and will be left in an arbitrary consistent state. |
269 | * |
270 | * Returns either vb->buf, or a pointer to a string literal. Do not modify |
271 | * vb before using the return value. |
272 | */ |
273 | |
274 | /* From transmit.c: */ |
ddfda861 |
275 | |
3955725c |
276 | adns_status adns__mkquery(adns_state ads, vbuf *vb, int *id_r, |
277 | const char *owner, int ol, |
e576be50 |
278 | const typeinfo *typei, adns_queryflags flags); |
279 | /* Assembles a query packet in vb, and returns id at *id_r. */ |
280 | |
e062dcae |
281 | adns_status adns__mkquery_frdgram(adns_state ads, vbuf *vb, int *id_r, |
282 | const byte *qd_dgram, int qd_dglen, int qd_begin, |
283 | adns_rrtype type, adns_queryflags flags); |
284 | /* Same as adns__mkquery, but takes the owner domain from an existing datagram. |
285 | * That domain must be correct and untruncated. |
286 | */ |
287 | |
3955725c |
288 | void adns__query_tcp(adns_query qu, struct timeval now); |
e576be50 |
289 | /* Query must be in state tcpwait/timew; it will be moved to a new state |
290 | * if possible and no further processing can be done on it for now. |
291 | * (Resulting state is one of tcpwait/timew (if server not connected), |
292 | * tcpsent/timew, child/childw or done/output.) |
293 | * |
294 | * adns__tcp_tryconnect should already have been called - _tcp |
295 | * will only use an existing connection (if there is one), which it |
296 | * may break. If the conn list lost then the caller is responsible for any |
297 | * reestablishment and retry. |
298 | */ |
299 | |
3955725c |
300 | void adns__query_udp(adns_query qu, struct timeval now); |
e576be50 |
301 | /* Query must be in state udp/NONE; it will be moved to a new state, |
302 | * and no further processing can be done on it for now. |
303 | * (Resulting state is one of udp/timew, tcpwait/timew (if server not connected), |
304 | * tcpsent/timew, child/childw or done/output.) |
305 | */ |
306 | |
307 | /* From query.c: */ |
37e28fde |
308 | |
8e5b0abb |
309 | int adns__internal_submit(adns_state ads, adns_query *query_r, |
3955725c |
310 | const typeinfo *typei, vbuf *qumsg_vb, int id, |
8e5b0abb |
311 | adns_queryflags flags, struct timeval now, |
312 | adns_status failstat, const qcontext *ctx); |
313 | /* Submits a query (for internal use, called during external submits). |
314 | * |
315 | * The new query is returned in *query_r, or we return adns_s_nomemory. |
316 | * |
68442019 |
317 | * The query datagram should already have been assembled in qumsg_vb; |
318 | * the memory for it is _taken over_ by this routine whether it |
319 | * succeeds or fails (if it succeeds, the vbuf is reused for qu->vb). |
8e5b0abb |
320 | * |
321 | * If failstat is nonzero then if we are successful in creating the query |
322 | * it is immediately failed with code failstat (but _submit still succeds). |
323 | * |
324 | * ctx is copied byte-for-byte into the query. |
325 | */ |
326 | |
327 | void *adns__alloc_interim(adns_query qu, size_t sz); |
328 | /* Allocates some memory, and records which query it came from |
329 | * and how much there was. |
330 | * |
331 | * If an error occurs in the query, all its memory is simply freed. |
332 | * |
333 | * If the query succeeds, one large buffer will be made which is |
334 | * big enough for all these allocations, and then adns__alloc_final |
335 | * will get memory from this buffer. |
336 | * |
e062dcae |
337 | * _alloc_interim can fail (and return 0). |
338 | * The caller must ensure that the query is failed. |
a49a6d7b |
339 | * |
e062dcae |
340 | * adns__alloc_interim_{only,fail}(qu,0) will not return 0, |
341 | * but it will not necessarily return a distinct pointer each time. |
8e5b0abb |
342 | */ |
343 | |
3955725c |
344 | void *adns__alloc_mine(adns_query qu, size_t sz); |
345 | /* Like _interim, but does not record the length for later |
346 | * copying into the answer. This just ensures that the memory |
347 | * will be freed when we're done with the query. |
348 | */ |
349 | |
8e5b0abb |
350 | void *adns__alloc_final(adns_query qu, size_t sz); |
a49a6d7b |
351 | /* Cannot fail, and cannot return 0. |
8e5b0abb |
352 | */ |
37e28fde |
353 | |
68442019 |
354 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz); |
355 | void adns__makefinal_str(adns_query qu, char **strp); |
356 | |
3955725c |
357 | void adns__reset_cnameonly(adns_query qu); |
68442019 |
358 | /* Resets all of the memory management stuff etc. to |
359 | * take account of only the CNAME. Used when we find an error somewhere |
360 | * and want to just report the error (with perhaps CNAME info), and also |
361 | * when we're halfway through RRs in a datagram and discover that we |
362 | * need to retry the query. |
363 | */ |
e576be50 |
364 | |
3955725c |
365 | void adns__query_done(adns_query qu); |
366 | void adns__query_fail(adns_query qu, adns_status stat); |
68442019 |
367 | |
4353a5c4 |
368 | /* From reply.c: */ |
369 | |
98a3f706 |
370 | void adns__procdgram(adns_state ads, const byte *dgram, int len, |
371 | int serv, struct timeval now); |
372 | |
373 | /* From types.c: */ |
374 | |
375 | const typeinfo *adns__findtype(adns_rrtype type); |
376 | |
377 | /* From parse.c: */ |
378 | |
f1e474dd |
379 | typedef struct { |
68442019 |
380 | adns_state ads; |
3955725c |
381 | adns_query qu; |
68442019 |
382 | int serv; |
f1e474dd |
383 | const byte *dgram; |
384 | int dglen, max, cbyte, namelen; |
3955725c |
385 | int *dmend_r; |
f1e474dd |
386 | } findlabel_state; |
387 | |
3955725c |
388 | void adns__findlabel_start(findlabel_state *fls, adns_state ads, |
389 | int serv, adns_query qu, |
f1e474dd |
390 | const byte *dgram, int dglen, int max, |
391 | int dmbegin, int *dmend_rlater); |
392 | /* Finds labels in a domain in a datagram. |
393 | * |
394 | * Call this routine first. |
3955725c |
395 | * dmend_rlater may be null. ads (and of course fls) may not be. |
396 | * serv may be -1, qu may be null - they are for error reporting. |
f1e474dd |
397 | */ |
398 | |
3955725c |
399 | adns_status adns__findlabel_next(findlabel_state *fls, int *lablen_r, int *labstart_r); |
f1e474dd |
400 | /* Then, call this one repeatedly. |
401 | * |
402 | * It will return adns_s_ok if all is well, and tell you the length |
403 | * and start of successive labels. labstart_r may be null, but |
404 | * lablen_r must not be. |
405 | * |
406 | * After the last label, it will return with *lablen_r zero. |
407 | * Do not then call it again; instead, just throw away the findlabel_state. |
408 | * |
409 | * *dmend_rlater will have been set to point to the next part of |
410 | * the datagram after the label (or after the uncompressed part, |
411 | * if compression was used). *namelen_rlater will have been set |
412 | * to the length of the domain name (total length of labels plus |
413 | * 1 for each intervening dot). |
414 | * |
415 | * If the datagram appears to be truncated, *lablen_r will be -1. |
416 | * *dmend_rlater, *labstart_r and *namelen_r may contain garbage. |
417 | * Do not call _next again. |
418 | * |
419 | * There may also be errors, in which case *dmend_rlater, |
420 | * *namelen_rlater, *lablen_r and *labstart_r may contain garbage. |
421 | * Do not then call findlabel_next again. |
422 | */ |
423 | |
3955725c |
424 | adns_status adns__parse_domain(adns_state ads, int serv, adns_query qu, |
425 | vbuf *vb, int flags, |
426 | const byte *dgram, int dglen, int *cbyte_io, int max); |
f1e474dd |
427 | /* vb must already have been initialised; it will be reset if necessary. |
428 | * If there is truncation, vb->used will be set to 0; otherwise |
429 | * (if there is no error) vb will be null-terminated. |
430 | * If there is an error vb and *cbyte_io may be left indeterminate. |
3955725c |
431 | * |
432 | * serv may be -1 and qu may be 0 - they are used for error reporting only. |
f1e474dd |
433 | */ |
434 | |
3955725c |
435 | adns_status adns__findrr(adns_query qu, int serv, |
f1e474dd |
436 | const byte *dgram, int dglen, int *cbyte_io, |
437 | int *type_r, int *class_r, int *rdlen_r, int *rdstart_r, |
3955725c |
438 | int *ownermatchedquery_r); |
f1e474dd |
439 | /* Finds the extent and some of the contents of an RR in a datagram |
440 | * and does some checks. The datagram is *dgram, length dglen, and |
441 | * the RR starts at *cbyte_io (which is updated afterwards to point |
442 | * to the end of the RR). |
443 | * |
444 | * The type, class and RRdata length and start are returned iff |
445 | * the corresponding pointer variables are not null. type_r and |
446 | * class_r may not be null. |
447 | * |
3955725c |
448 | * If ownermatchedquery_r != 0 then the owner domain of this |
449 | * RR will be compared with that in the query (or, if the query |
450 | * has gone to a CNAME lookup, with the canonical name). |
451 | * In this case, *ownermatchedquery_r will be set to 0 or 1. |
452 | * The query datagram (or CNAME datagram) MUST be valid and not truncated. |
f1e474dd |
453 | * |
454 | * If there is truncation then *type_r will be set to -1 and |
455 | * *cbyte_io, *class_r, *rdlen_r, *rdstart_r and *eo_matched_r will be |
456 | * undefined. |
457 | * |
3955725c |
458 | * qu must obviously be non-null. |
459 | * |
f1e474dd |
460 | * If an error is returned then *type_r will be undefined too. |
461 | */ |
98a3f706 |
462 | |
f1e474dd |
463 | int vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len); |
8402e34c |
464 | |
465 | /* From event.c: */ |
4353a5c4 |
466 | |
8402e34c |
467 | void adns__tcp_broken(adns_state ads, const char *what, const char *why); |
4353a5c4 |
468 | void adns__tcp_tryconnect(adns_state ads, struct timeval now); |
e576be50 |
469 | |
4353a5c4 |
470 | void adns__autosys(adns_state ads, struct timeval now); |
e576be50 |
471 | /* Make all the system calls we want to if the application wants us to. */ |
37e28fde |
472 | |
473 | /* Useful static inline functions: */ |
474 | |
475 | static inline void timevaladd(struct timeval *tv_io, long ms) { |
476 | struct timeval tmp; |
477 | assert(ms>=0); |
478 | tmp= *tv_io; |
94436798 |
479 | tmp.tv_usec += (ms%1000)*1000000; |
37e28fde |
480 | tmp.tv_sec += ms/1000; |
94436798 |
481 | if (tmp.tv_usec >= 1000000) { tmp.tv_sec++; tmp.tv_usec -= 1000; } |
37e28fde |
482 | *tv_io= tmp; |
ddfda861 |
483 | } |
37e28fde |
484 | |
485 | static inline int ctype_whitespace(int c) { return c==' ' || c=='\n' || c=='\t'; } |
486 | static inline int ctype_digit(int c) { return c>='0' && c<='9'; } |
98a3f706 |
487 | static inline int ctype_alpha(int c) { |
488 | return (c >= 'a' && c <= 'z') || (c >= 'A' || c <= 'Z'); |
489 | } |
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490 | |
491 | /* Useful macros */ |
492 | |
8e5b0abb |
493 | #define MEM_ROUND(sz) \ |
494 | (( ((sz)+sizeof(union maxalign)-1) / sizeof(union maxalign) ) \ |
495 | * sizeof(union maxalign) ) |
496 | |
4353a5c4 |
497 | #define LIST_INIT(list) ((list).head= (list).tail= 0) |
498 | |
37e28fde |
499 | #define LIST_UNLINK_PART(list,node,part) \ |
500 | do { \ |
501 | if ((node)->back) (node)->back->part next= (node)->part next; \ |
502 | else (list).head= (node)->part next; \ |
503 | if ((node)->next) (node)->next->part back= (node)->part back; \ |
504 | else (list).tail= (node)->part back; \ |
505 | } while(0) |
506 | |
507 | #define LIST_LINK_TAIL_PART(list,node,part) \ |
508 | do { \ |
86e7b8d9 |
509 | (node)->part next= 0; \ |
510 | (node)->part back= (list).tail; \ |
511 | if ((list).tail) (list).tail->part next= (node); else (list).part head= (node); \ |
37e28fde |
512 | (list).tail= (node); \ |
513 | } while(0) |
514 | |
515 | #define LIST_UNLINK(list,node) LIST_UNLINK_PART(list,node,) |
4353a5c4 |
516 | #define LIST_LINK_TAIL(list,node) LIST_LINK_TAIL_PART(list,node,) |
37e28fde |
517 | |
86e7b8d9 |
518 | #define GETIL_B(cb) (((dgram)[(cb)++]) & 0x0ff) |
98a3f706 |
519 | #define GET_B(cb,tv) ((tv)= GETIL_B((cb))) |
520 | #define GET_W(cb,tv) ((tv)=0, (tv)|=(GETIL_B((cb))<<8), (tv)|=GETIL_B(cb), (tv)) |
521 | |
37e28fde |
522 | #endif |