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comparison include/dcc_clnt.h @ 0:c7f6b056b673

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First import of vendor version
author Peter Gervai <grin@grin.hu>
date Tue, 10 Mar 2009 13:49:58 +0100
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-1:000000000000 0:c7f6b056b673
1 /* Distributed Checksum Clearinghouse
2 *
3 * internal client definitions
4 *
5 * Copyright (c) 2008 by Rhyolite Software, LLC
6 *
7 * This agreement is not applicable to any entity which sells anti-spam
8 * solutions to others or provides an anti-spam solution as part of a
9 * security solution sold to other entities, or to a private network
10 * which employs the DCC or uses data provided by operation of the DCC
11 * but does not provide corresponding data to other users.
12 *
13 * Permission to use, copy, modify, and distribute this software without
14 * changes for any purpose with or without fee is hereby granted, provided
15 * that the above copyright notice and this permission notice appear in all
16 * copies and any distributed versions or copies are either unchanged
17 * or not called anything similar to "DCC" or "Distributed Checksum
18 * Clearinghouse".
19 *
20 * Parties not eligible to receive a license under this agreement can
21 * obtain a commercial license to use DCC by contacting Rhyolite Software
22 * at sales@rhyolite.com.
23 *
24 * A commercial license would be for Distributed Checksum and Reputation
25 * Clearinghouse software. That software includes additional features. This
26 * free license for Distributed ChecksumClearinghouse Software does not in any
27 * way grant permision to use Distributed Checksum and Reputation Clearinghouse
28 * software
29 *
30 * THE SOFTWARE IS PROVIDED "AS IS" AND RHYOLITE SOFTWARE, LLC DISCLAIMS ALL
31 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL RHYOLITE SOFTWARE, LLC
33 * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
34 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
35 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
36 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
37 * SOFTWARE.
38 *
39 * Rhyolite Software DCC 1.3.103-1.120 $Revision$
40 */
41
42 #ifndef DCC_CLNT_H
43 #define DCC_CLNT_H
44
45 #include "dcc_defs.h"
46
47
48 #define DCC_DCCD_DELAY (100*1000) /* typical server delay */
49
50 /* The minimum assumed RTT should be long enough for the DCC server to do
51 * some disk operations even if the server and network have usually
52 * been faster. */
53 #define DCC_MIN_RTT (DCC_DCCD_DELAY + 150*1000)
54
55 #define DCC_MAX_XMITS 4
56
57 /* worst client-->server-->client RTT
58 * The total delay for N exponentially increasing delays starting with X
59 * is about X*(2**N). With the delay limited to Y, it is Y*N.
60 * The RTT measuring done with NOPs uses retransmission delays based on
61 * DCC_MIN_RTT, and so will not find a server with a worse delay than
62 * DCC_MAX_RTT */
63 #define DCC_MAX_RTT (DCC_MIN_RTT<<DCC_MAX_XMITS)
64 #define DCC_MAX_RTT_SECS (DCC_MAX_RTT/DCC_US)
65
66 #define DCC_RTT_ADJ_MAX (DCC_MAX_RTT/2) /* limit manual RTT bias */
67 #define DCC_RTT_VERS_ADJ DCC_RTT_ADJ_MAX /* penalize strange versions */
68 #define DCC_RTT_BAD (DCC_MAX_RTT*2+1)
69
70 /* If DCC_MAX_XMITS and the retransmission delay limited to DCC_MAX_RTT_SECS,
71 * the the worst case delay is DCC_MAX_XMITS*DCC_MAX_RTT_SECS=16 seconds */
72 #define DCC_MAX_DELAY (DCC_MAX_XMITS*DCC_MAX_RTT)
73 #define DCC_MAX_DELAY_SECS (DCC_MAX_DELAY/DCC_US)
74
75
76 /* No client's retransmission can be delayed by more than this starting
77 * from the initial intransmission and including network delays for the
78 * last retransmission
79 * This controls how long a DCC server must remember old requests
80 * to recognize retransmissions. */
81 #define DCC_MAX_RETRANS_DELAY_SECS (DCC_MAX_DELAY_SECS*2)
82
83
84 #ifndef DCC_MAP_RESOLVE
85 #define DCC_MAP_RESOLVE (2*60*60) /* DNS resolve server host names */
86 #endif
87 #ifndef DCC_WHITECLNT_RESOLVE
88 #define DCC_WHITECLNT_RESOLVE (2*60*60) /* DNS resolve whitelist hosts */
89 #endif
90
91 #define DCC_MAX_SRVR_NMS 8 /* server hostnames */
92 #define DCC_MAX_SRVR_ADDRS 12 /* server IP addresses */
93
94 extern u_char dcc_clnt_debug;
95 extern int dcc_debug_ttl;
96
97 extern char dcc_clnt_hostname[MAXHOSTNAMELEN];
98
99 /* information kept by a client about a server */
100 typedef struct {
101 int rtt_adj;
102 DCC_CLNT_ID clnt_id; /* our client-ID sent to the server */
103 u_int16_t port; /* network byte order port # */
104 u_char defined; /* name resolves into an IP address */
105 char hostname[DCC_MAXDOMAINLEN]; /* null terminated */
106 u_char pad;
107 DCC_PASSWD passwd; /* null filled but not terminated */
108 } DCC_SRVR_NM;
109
110 /* the port number must be installed in this before use */
111 #define DCC_SRVR_NM_DEF_HOST "127.0.0.1"
112 #define DCC_SRVR_NM_DEF {0, DCC_ID_ANON, 0, 0, {DCC_SRVR_NM_DEF_HOST}, 0, {""}}
113
114 typedef u_int16_t NAM_INX;
115 typedef struct { /* a single server address */
116 DCC_IP ip;
117 time_t rtt_updated; /* when RTT last updated */
118 int rtt; /* round trip time in microseconds */
119 int srvr_wait; /* microseconds server penalizes us */
120 u_int32_t resp_mem; /* 1 bit per recent xmit */
121 # define DCC_TOTAL_XMITS_MAX (sizeof(u_int32_t)*8)
122 NAM_INX nam_inx; /* DCC_NO_NM or DCC_SRVR_NM.nms index */
123 # define NO_NAM ((NAM_INX)(-1))
124 # define GOOD_NAM(n) ((n) < DCC_MAX_SRVR_NMS)
125 DCC_SRVR_ID srvr_id; /* the server's claimed ID */
126 u_char total_xmits;
127 u_char total_resps;
128 u_char srvr_pkt_vers;
129 u_char flags;
130 # define DCC_SRVR_ADDR_MHOME 0x01 /* do not use connect */
131 DCC_BRAND brand; /* the server's announced brand name */
132 } DCC_SRVR_ADDR;
133
134 typedef u_char SRVR_INX;
135 typedef struct {
136 time_t resolve; /* when names need to be resolved */
137 time_t measure; /* when RTT measurements need */
138 int gen;
139 int base_rtt; /* RTT to the chosen server */
140 int thold_rtt; /* threshold for switching */
141 int avg_thold_rtt; /* long term threshold */
142 int num_srvrs; /* addresses in .addrs */
143 time_t fail_time; /* DCC broken until then */
144 u_char fail_exp; /* backoff */
145 # define DCC_INIT_FAIL_SECS (DCC_MAX_DELAY_SECS*2)
146 # define DCC_MAX_FAIL_EXP 6
147 # define DCC_MAX_FAIL_SECS (DCC_INIT_FAIL_SECS<<DCC_MAX_FAIL_EXP)
148 SRVR_INX srvr_inx; /* NO_SRVR or index in .addrs */
149 # define NO_SRVR ((SRVR_INX)(-1))
150 # define GOOD_SRVR(c,s) ((s) < (c)->num_srvrs)
151 # define HAVE_SRVR(c) GOOD_SRVR(c,c->srvr_inx)
152 DCC_SRVR_NM nms[DCC_MAX_SRVR_NMS];
153 DCC_SRVR_ADDR addrs[DCC_MAX_SRVR_ADDRS];
154 } DCC_SRVR_CLASS;
155
156 /* Information about DCC servers shared among clients on a host
157 * This is the shape of the mmap()'ed file. */
158 typedef struct {
159 # define DCC_MAP_INFO_VERSION "DCC client mapped data version #11"
160 char version[36];
161 u_int residue; /* random # for picking addresses */
162 u_char flags;
163 # define DCC_INFO_FG_IPV6 0x01
164 #ifdef NO_IPV6
165 # define DCC_INFO_IPV6() 0
166 #else
167 # define DCC_INFO_IPV6() (dcc_clnt_info \
168 && (dcc_clnt_info->flags \
169 & DCC_INFO_FG_IPV6) != 0)
170 #endif
171 # define DCC_INFO_FG_SOCKS 0x02
172 # define DCC_INFO_FG_TMP 0x04
173 DCC_HDR proto_hdr; /* prototype DCC request header */
174 DCC_SRVR_CLASS dcc; /* normal DCC services */
175 DCC_SRVR_CLASS grey; /* grey listing */
176 DCC_IP src; /* send from this interface */
177 time_t dccproc_last;
178 time_t dccproc_dccifd_try;
179 int dccproc_c;
180 # define DCCPROC_TRY_DCCIFD (60*60) /* start dccifd once/hour */
181 # define DCCPROC_MAX_CREDITS 500 /* at least 500 */
182 # define DCCPROC_COST 10 /* and at least 0.1/second */
183 } DCC_CLNT_INFO;
184
185
186 #define DCC_MAP_INFO_VERSION_10 "DCC client mapped data version #10"
187 #ifdef DCC_MAP_INFO_VERSION_10
188 typedef struct {
189 int rtt_adj;
190 DCC_CLNT_ID clnt_id;
191 u_int16_t port;
192 u_char defined;
193 char hostname[MAXHOSTNAMELEN];
194 u_char pad;
195 DCC_PASSWD passwd;
196 } DCC_V10_SRVR_NM;
197 typedef struct {
198 time_t resolve;
199 time_t measure;
200 int gen;
201 int base_rtt;
202 int thold_rtt;
203 int avg_thold_rtt;
204 int num_addrs;
205 time_t fail_time;
206 u_char fail_exp;
207 u_char act_inx;
208 DCC_V10_SRVR_NM nms[DCC_MAX_SRVR_NMS];
209 DCC_SRVR_ADDR addrs[DCC_MAX_SRVR_ADDRS];
210 } DCC_V10_SRVR_CLASS;
211 typedef struct {
212 char version[36];
213 u_int residue;
214 u_char flags;
215 DCC_HDR proto_hdr;
216 DCC_V10_SRVR_CLASS dcc;
217 DCC_V10_SRVR_CLASS grey;
218 DCC_IP src;
219 time_t dccproc_last;
220 time_t dccproc_dccifd_try;
221 int dccproc_c;
222 } DCC_V10_CLNT_INFO;
223 #endif /* DCC_MAP_INFO_VERSION_10 */
224
225 #define DCC_MAP_INFO_VERSION_9 "DCC client mapped data version #9"
226 #ifdef DCC_MAP_INFO_VERSION_9
227 typedef struct {
228 char version[36];
229 u_int residue;
230 u_char flags;
231 DCC_HDR proto_hdr;
232 DCC_V10_SRVR_CLASS dcc;
233 DCC_V10_SRVR_CLASS grey;
234 DCC_IP src;
235 } DCC_V9_CLNT_INFO;
236 #endif /* DCC_MAP_INFO_VERSION_9 */
237
238 #define DCC_MAP_INFO_VERSION_8 "DCC client mapped data version #8"
239 #ifdef DCC_MAP_INFO_VERSION_8
240 typedef struct {
241 char version[36];
242 u_int residue;
243 u_char flags;
244 DCC_HDR proto_hdr;
245 DCC_V10_SRVR_CLASS dcc;
246 DCC_V10_SRVR_CLASS grey;
247 } DCC_V8_CLNT_INFO;
248 #endif /* DCC_MAP_INFO_VERSION_8 */
249
250 #ifndef DCC_WIN32
251 #define DCC_MAP_INFO_VERSION_7 "DCC client mapped data version #7"
252 #endif
253 #ifdef DCC_MAP_INFO_VERSION_7
254 typedef struct {
255 DCC_SOCKU su;
256 time_t rtt_updated;
257 int rtt;
258 int srvr_wait;
259 u_int32_t resp_mem;
260 u_int16_t nm_inx;
261 DCC_SRVR_ID srvr_id;
262 u_char total_xmits;
263 u_char total_resps;
264 u_char srvr_pkt_vers;
265 u_char unused[1];
266 DCC_BRAND brand;
267 } DCC_V7_IPV6_SRVR_ADDR;
268 typedef struct {
269 union {
270 struct sockaddr sa;
271 struct sockaddr_in ipv4;
272 struct dcc_sockaddr_in6 ipv6;
273 } su;
274 time_t rtt_updated;
275 int rtt;
276 int srvr_wait;
277 u_int32_t resp_mem;
278 u_int16_t nm_inx;
279 DCC_SRVR_ID srvr_id;
280 u_char total_xmits;
281 u_char total_resps;
282 u_char srvr_pkt_vers;
283 u_char unused[1];
284 DCC_BRAND brand;
285 } DCC_V7_NOIPV6_SRVR_ADDR;
286
287 typedef struct {
288 time_t resolve;
289 time_t measure;
290 int gen;
291 int base_rtt;
292 int thold_rtt;
293 int avg_thold_rtt;
294 int num_addrs;
295 time_t fail_time;
296 u_char fail_exp;
297 u_char act_inx;
298 DCC_V10_SRVR_NM nms[8];
299 DCC_V7_IPV6_SRVR_ADDR addrs[12];
300 } DCC_V7_IPV6_SRVR_CLASS;
301 typedef struct {
302 time_t resolve;
303 time_t measure;
304 int gen;
305 int base_rtt;
306 int thold_rtt;
307 int avg_thold_rtt;
308 int num_addrs;
309 time_t fail_time;
310 u_char fail_exp;
311 u_char act_inx;
312 DCC_V10_SRVR_NM nms[8];
313 DCC_V7_NOIPV6_SRVR_ADDR addrs[12];
314 } DCC_V7_NOIPV6_SRVR_CLASS;
315
316 typedef struct {
317 char version[36];
318 u_int residue;
319 u_char flags;
320 DCC_HDR proto_hdr;
321 DCC_V7_IPV6_SRVR_CLASS dcc;
322 DCC_V7_IPV6_SRVR_CLASS grey;
323 } DCC_V7_IPV6_CLNT_INFO;
324 typedef struct {
325 char version[36];
326 u_int residue;
327 u_char flags;
328 DCC_HDR proto_hdr;
329 DCC_V7_NOIPV6_SRVR_CLASS dcc;
330 DCC_V7_NOIPV6_SRVR_CLASS grey;
331 } DCC_V7_NOIPV6_CLNT_INFO;
332 #endif /* DCC_MAP_INFO_VERSION_7 */
333
334 #ifndef DCC_WIN32
335 #define DCC_MAP_INFO_VERSION_6 "DCC client mapped data version #6"
336 #endif
337 #ifdef DCC_MAP_INFO_VERSION_6
338 typedef struct {
339 char version[36];
340 time_t resolve;
341 time_t measure;
342 time_t srvr_fail_time;
343 int base_rtt;
344 int thold_rtt;
345 int avg_thold_rtt;
346 u_char unused[8];
347 u_char srvr_fail_exp;
348 u_char act_inx;
349 u_char total_addrs;
350 u_char flags;
351 DCC_HDR proto_hdr;
352 DCC_V10_SRVR_NM nms[8];
353 } DCC_V6_CLNT_INFO;
354
355 typedef struct {
356 DCC_CLNT_ID clnt_id;
357 u_int16_t port;
358 char hostname[MAXHOSTNAMELEN+1];
359 DCC_PASSWD passwd;
360 signed char rtt_adj;
361 } DCC_V5_SRVR_NM;
362
363 typedef struct {
364 # define DCC_MAP_INFO_VERSION_5 "DCC client mapped data version #5"
365 char version[36];
366 time_t resolve;
367 int min_delay;
368 u_int16_t act_inx;
369 u_char unused[13];
370 u_char total_addrs;
371 u_char working_addrs;
372 u_char flags;
373 DCC_HDR proto_hdr;
374 DCC_V5_SRVR_NM nms[8];
375 } DCC_V5_CLNT_INFO;
376 #endif /* DCC_MAP_INFO_VERSION_6 */
377
378 #define DCC_IS_GREY(class) ((class) == &dcc_clnt_info->grey)
379 #define DCC_IS_GREY_STR(c) (DCC_IS_GREY(c) ? "greylist" : "DCC")
380 #define DCC_GREY2PORT(mode) htons((mode)? DCC_GREY_PORT : DCC_SRVR_PORT)
381 #define DCC_CLASS2PORT(c) DCC_GREY2PORT(DCC_IS_GREY(c))
382 #define DCC_GREY2CLASS(g) ((g) ? &dcc_clnt_info->grey : &dcc_clnt_info->dcc)
383
384 extern DCC_CLNT_INFO *dcc_clnt_info; /* memory mapped shared data */
385 extern u_char dcc_all_srvrs; /* try to contact all servers */
386 extern DCC_PATH dcc_info_nm;
387
388
389 typedef struct { /* record of 1 transmission */
390 DCC_OP_NUMS op_nums;
391 time_t sent_us; /* microseconds since operation start */
392 DCC_OPS op;
393 DCC_CLNT_ID id;
394 int addrs_gen;
395 DCC_SOCKU su;
396 int addr_inx;
397 DCC_PASSWD passwd;
398 } DCC_XLOG_ENTRY;
399
400 typedef struct {
401 u_char outstanding; /* unheard responses */
402 u_char working_addrs;
403 struct {
404 u_char xmits;
405 u_char resps;
406 } cur[DCC_MAX_SRVR_ADDRS];
407 DCC_XLOG_ENTRY *base; /* start of array */
408 DCC_XLOG_ENTRY *next; /* next entry to use */
409 DCC_XLOG_ENTRY *last; /* last entry in array */
410 } DCC_XLOG;
411
412 /* invalid timer */
413 #define DCC_OP_NUMS_NULL ((u_int32_t)-1)
414
415
416 typedef struct dcc_clnt_ctxt {
417 struct dcc_clnt_ctxt *fwd;
418 struct timeval now; /* current time */
419 struct timeval start; /* when operation started */
420 int now_us; /* usecs since start of operation */
421 time_t bind_time; /* when to retry binding socket */
422 # define DCC_CTXT_REBIND_SECS 3600 /* check local interface hourly */
423 SOCKET soc;
424 DCC_SOCKU bind_su; /* socket bound to this address */
425 DCC_SOCKU conn_su; /* socket connected to this address */
426 DCC_XLOG xlog;
427 DCC_XLOG_ENTRY xlog_entries[DCC_MAX_SRVR_ADDRS*DCC_MAX_XMITS];
428 u_char flags;
429 # define DCC_CTXT_USING_IPV4 0x01 /* socket is opened for IPv4 */
430 # define DCC_CTXT_SRCBAD 0x02 /* bind() failed */
431 } DCC_CLNT_CTXT;
432
433 #define DCC_INFO_USE_IPV4 "IPv6 off"
434 #define DCC_INFO_USE_IPV6 "IPv6 on"
435 #define DCC_INFO_USE_SOCKS "use SOCKS"
436 #define DCC_INFO_USE_SRC "src="
437 #define DCC_INFO_USE_SRCBAD "but unused"
438
439
440 /* many POSIX thread implementations have unexpected side effects on
441 * ordinary system calls, so allow the calling application
442 * to not use threads by having both threaded and unthreaded
443 * DCC client interfaces */
444
445 extern void dcc_ctxts_lock(void);
446 extern void dcc_ctxts_unlock(void);
447 extern void dcc_syslog_lock(void);
448 extern void dcc_syslog_unlock(void);
449 extern u_char dcc_clnt_wake_resolve(void);
450 extern void dcc_clnt_stop_resolve(void);
451 extern void dcc_clnt_unthread_init(void);
452 extern void dcc_clnt_thread_init(void);
453 extern void lock_work(void);
454 extern void unlock_work(void);
455 extern void lock_wf(void);
456 extern void unlock_wf(void);
457 #ifdef DCC_DEBUG_CLNT_LOCK
458 extern void assert_ctxts_locked(void);
459 extern void assert_ctxts_unlocked(void);
460 extern void assert_info_locked(void);
461 extern void assert_info_unlocked(void);
462 extern void assert_cwf_locked(void);
463 #else
464 #define assert_ctxts_locked()
465 #define assert_ctxts_unlocked()
466 #define assert_info_locked()
467 #define assert_info_unlocked()
468 #define assert_cwf_locked()
469 #endif /* DCC_DEBUG_CLNT_LOCK */
470 extern u_char helper_lock_init(void);
471 extern void helper_lock(void);
472 extern void helper_unlock(void);
473
474
475 extern const char *dcc_ap2str(const DCC_SRVR_ADDR *);
476 extern int dcc_ap2str_opt(char *, int,
477 const DCC_SRVR_CLASS *, u_char inx, char);
478
479 extern FILE *dcc_open_srvr_nm(DCC_EMSG, const char *);
480 extern const char *dcc_parse_nm_port(DCC_EMSG, const char *, u_int,
481 char *, u_int, u_int16_t *, char *, u_int,
482 const char *, int);
483 extern int dcc_parse_srvr_nm(DCC_EMSG, DCC_SRVR_NM *, u_char *,
484 const char *, const char *, int);
485 extern const char *dcc_srvr_nm(u_char);
486 extern DCC_CLNT_CTXT *dcc_alloc_ctxt(void);
487 extern void dcc_rel_ctxt(DCC_CLNT_CTXT *);
488 extern u_char dcc_info_unlock(DCC_EMSG);
489 extern u_char dcc_info_lock(DCC_EMSG);
490 extern void dcc_force_measure_rtt(DCC_SRVR_CLASS *);
491 extern u_char dcc_create_map(DCC_EMSG, const DCC_PATH, int *,
492 const DCC_SRVR_NM *, int,
493 const DCC_SRVR_NM *, int,
494 const DCC_IP *, u_char);
495 extern u_char dcc_unmap_close_info(DCC_EMSG);
496 extern u_char dcc_map_info(DCC_EMSG, const char *, int);
497 extern u_char dcc_map_lock_info(DCC_EMSG, const char *, int);
498 extern u_char dcc_map_tmp_info(DCC_EMSG, const DCC_SRVR_NM *,
499 const DCC_IP *, u_char);
500 typedef u_char DCC_CLNT_FGS;
501 #define DCC_CLNT_FG_NONE 0x00
502 #define DCC_CLNT_FG_GREY 0x01
503 #define DCC_CLNT_FG_BAD_SRVR_OK 0x02
504 #define DCC_CLNT_FG_NO_PICK_SRVR 0x04
505 #define DCC_CLNT_FG_NO_FAIL 0x08
506 #define DCC_CLNT_FG_RETRY 0x10 /* retrying with different server */
507 #define DCC_CLNT_FG_SLOW 0x20 /* slow timeouts */
508 #define DCC_CLNT_FG_RETRANS 0x40 /* use old op_nums.r */
509 extern u_char dcc_clnt_rdy(DCC_EMSG, DCC_CLNT_CTXT *, DCC_CLNT_FGS);
510 extern DCC_CLNT_CTXT *dcc_tmp_clnt_init(DCC_EMSG, DCC_CLNT_CTXT *,
511 const DCC_SRVR_NM *,
512 const DCC_IP *, DCC_CLNT_FGS, u_char);
513 extern DCC_CLNT_CTXT *dcc_clnt_start(DCC_EMSG, DCC_CLNT_CTXT *,
514 const char *, DCC_CLNT_FGS);
515 extern DCC_CLNT_CTXT *dcc_clnt_start_fin(DCC_EMSG, DCC_CLNT_CTXT *);
516 extern DCC_CLNT_CTXT *dcc_clnt_init(DCC_EMSG, DCC_CLNT_CTXT *,
517 const char *, DCC_CLNT_FGS);
518 extern u_char dcc_clnt_connect(DCC_EMSG, DCC_CLNT_CTXT *, const DCC_SOCKU *);
519 extern void dcc_clnt_soc_close(DCC_CLNT_CTXT *);
520 extern u_char dcc_clnt_soc_reopen(DCC_EMSG, DCC_CLNT_CTXT *);
521 extern int dcc_select_poll(DCC_EMSG, SOCKET, u_char, int);
522 extern u_char dcc_clnt_op(DCC_EMSG, DCC_CLNT_CTXT *, DCC_CLNT_FGS,
523 const SRVR_INX *, DCC_SRVR_ID *, DCC_SOCKU *,
524 DCC_HDR *, int, DCC_OPS, DCC_OP_RESP *, int);
525
526 extern DCC_OPS dcc_aop(DCC_EMSG, DCC_CLNT_CTXT *,
527 DCC_CLNT_FGS, SRVR_INX, time_t,
528 DCC_AOPS, u_int32_t, u_char, u_char, u_char,
529 u_char *, u_int, DCC_OP_RESP *, DCC_SOCKU *);
530 extern u_char dcc_aop_persist(DCC_EMSG, DCC_CLNT_CTXT *, DCC_CLNT_FGS, u_char,
531 DCC_AOPS, u_int32_t, int, DCC_OP_RESP *);
532
533 extern void dcc_print_info(const char *, const DCC_CLNT_INFO *,
534 u_char, u_char, u_char, u_char, u_char);
535
536 extern int get_xhdr_fname(char *, int, const DCC_CLNT_INFO *);
537 extern void xhdr_init(DCC_HEADER_BUF *, DCC_SRVR_ID);
538 extern void xhdr_add_str(DCC_HEADER_BUF *, const char *, ...) PATTRIB(2,3);
539 extern void xhdr_add_ck(DCC_HEADER_BUF *, DCC_CK_TYPES, DCC_TGTS);
540 extern void xhdr_write(LOG_WRITE_FNC, void *, const char *, int, u_char);
541 extern void xhdr_whitelist(DCC_HEADER_BUF *);
542 extern u_char is_xhdr(const char *, int);
543
544
545 #endif /* DCC_CLNT_H */