2 * Copyright (c) 1995-1997, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
6 * NT server based on threads by
7 * Chas Woodfield, Fretwell Downing Datasystem.
10 * Revision 1.40 1997-09-17 12:10:41 adam
13 * Revision 1.39 1997/09/09 10:10:19 adam
14 * Another MSV5.0 port. Changed projects to include proper
15 * library/include paths.
16 * Server starts server in test-mode when no options are given.
18 * Revision 1.38 1997/09/04 14:19:14 adam
21 * Revision 1.37 1997/09/01 08:53:01 adam
22 * New windows NT/95 port using MSV5.0. The test server 'ztest' was
23 * moved a separate directory. MSV5.0 project server.dsp created.
24 * As an option, the server can now operate as an NT service.
26 * Revision 1.36 1996/07/06 19:58:36 quinn
27 * System headerfiles gathered in yconfig
29 * Revision 1.35 1996/05/29 10:03:28 quinn
32 * Revision 1.34 1996/02/21 13:12:07 quinn
33 * *** empty log message ***
35 * Revision 1.33 1996/02/10 12:23:49 quinn
36 * Enable inetd operations fro TCP/IP stack
38 * Revision 1.32 1996/01/19 15:41:52 quinn
39 * *** empty log message ***
41 * Revision 1.31 1995/11/17 11:09:39 adam
42 * Added new option '-c' to specify configuration name in control block.
44 * Revision 1.30 1995/11/01 13:54:59 quinn
47 * Revision 1.29 1995/10/30 12:41:29 quinn
48 * Added hostname lookup for server.
50 * Revision 1.28 1995/09/29 17:12:30 quinn
53 * Revision 1.27 1995/09/27 15:03:02 quinn
54 * Modified function heads & prototypes.
56 * Revision 1.26 1995/08/29 14:44:51 quinn
59 * Revision 1.25 1995/08/29 11:18:02 quinn
60 * Added code to receive close
62 * Revision 1.24 1995/06/16 10:31:39 quinn
63 * Added session timeout.
65 * Revision 1.23 1995/06/15 12:30:48 quinn
68 * Revision 1.22 1995/06/15 07:45:17 quinn
71 * Revision 1.21 1995/06/06 08:15:40 quinn
74 * Revision 1.20 1995/05/29 08:12:09 quinn
77 * Revision 1.19 1995/05/16 09:37:27 quinn
80 * Revision 1.18 1995/05/16 08:51:09 quinn
81 * License, documentation, and memory fixes
83 * Revision 1.17 1995/05/15 11:56:42 quinn
84 * Asynchronous facilities. Restructuring of seshigh code.
86 * Revision 1.16 1995/04/10 10:23:40 quinn
87 * Some work to add scan and other things.
89 * Revision 1.15 1995/03/31 10:16:51 quinn
92 * Revision 1.14 1995/03/31 09:18:58 quinn
95 * Revision 1.13 1995/03/30 16:08:39 quinn
98 * Revision 1.12 1995/03/30 13:29:02 quinn
101 * Revision 1.11 1995/03/30 12:18:17 quinn
104 * Revision 1.10 1995/03/29 15:40:16 quinn
105 * Ongoing work. Statserv is now dynamic by default
107 * Revision 1.9 1995/03/27 08:34:30 quinn
108 * Added dynamic server functionality.
109 * Released bindings to session.c (is now redundant)
111 * Revision 1.8 1995/03/20 09:46:26 quinn
114 * Revision 1.7 1995/03/16 13:29:04 quinn
115 * Partitioned server.
117 * Revision 1.6 1995/03/15 15:18:52 quinn
118 * Little changes to better support nonblocking I/O
121 * Revision 1.5 1995/03/15 08:37:45 quinn
122 * Now we're pretty much set for nonblocking I/O.
124 * Revision 1.4 1995/03/14 16:59:48 quinn
127 * Revision 1.3 1995/03/14 11:30:15 quinn
130 * Revision 1.2 1995/03/14 10:28:03 quinn
131 * More work on demo server.
133 * Revision 1.1 1995/03/10 18:22:45 quinn
134 * The rudiments of an asynchronous server.
155 #include <comstack.h>
161 #include <statserv.h>
163 static IOCHAN pListener;
165 static char *me = "statserver";
169 static statserv_options_block control_block = {
170 1, /* dynamic mode */
171 LOG_DEFAULT_LEVEL, /* log level */
173 "", /* diagnostic output to stderr */
174 "tcp:@:9999", /* default listener port */
175 PROTO_Z3950, /* default application protocol */
176 60, /* idle timeout (minutes) */
177 1024*1024, /* maximum PDU size (approx.) to allow */
178 "default-config", /* configuration name to pass to backend */
183 * handle incoming connect requests.
184 * The dynamic mode is a bit tricky mostly because we want to avoid
185 * doing all of the listening and accepting in the parent - it's
190 typedef struct _ThreadList ThreadList;
192 typedef struct _ThreadList
199 static ThreadList *pFirstThread;
200 static CRITICAL_SECTION Thread_CritSect;
201 static BOOL bInitialized = FALSE;
203 static void ThreadList_Initialize()
205 /* Initialize the critical Sections */
206 InitializeCriticalSection(&Thread_CritSect);
208 /* Set the first thraed */
211 /* we have been initialized */
215 static void statserv_add(HANDLE hThread, IOCHAN pIOChannel)
217 /* Only one thread can go through this section at a time */
218 EnterCriticalSection(&Thread_CritSect);
221 /* Lets create our new object */
222 ThreadList *pNewThread = (ThreadList *)malloc(sizeof(ThreadList));
223 pNewThread->hThread = hThread;
224 pNewThread->pIOChannel = pIOChannel;
225 pNewThread->pNext = pFirstThread;
226 pFirstThread = pNewThread;
228 /* Lets let somebody else create a new object now */
229 LeaveCriticalSection(&Thread_CritSect);
233 void statserv_remove(IOCHAN pIOChannel)
235 /* Only one thread can go through this section at a time */
236 EnterCriticalSection(&Thread_CritSect);
239 ThreadList *pCurrentThread = pFirstThread;
240 ThreadList *pNextThread;
241 ThreadList *pPrevThread =NULL;
243 /* Step through alll the threads */
244 for (; pCurrentThread != NULL; pCurrentThread = pNextThread)
246 /* We only need to compare on the IO Channel */
247 if (pCurrentThread->pIOChannel == pIOChannel)
249 /* We have found the thread we want to delete */
250 /* First of all reset the next pointers */
251 if (pPrevThread == NULL)
252 pFirstThread = pCurrentThread->pNext;
254 pPrevThread->pNext = pCurrentThread->pNext;
256 /* All we need todo now is delete the memory */
257 free(pCurrentThread);
259 /* No need to look at any more threads */
264 /* We need to look at another thread */
265 pNextThread = pCurrentThread->pNext;
269 /* Lets let somebody else remove an object now */
270 LeaveCriticalSection(&Thread_CritSect);
274 void statserv_closedown()
276 /* Shouldn't do anything if we are not initialized */
280 HANDLE *pThreadHandles = NULL;
282 /* We need to stop threads adding and removing while we */
283 /* start the closedown process */
284 EnterCriticalSection(&Thread_CritSect);
287 /* We have exclusive access to the thread stuff now */
288 /* Y didn't i use a semaphore - Oh well never mind */
289 ThreadList *pCurrentThread = pFirstThread;
291 /* Before we do anything else, we need to shutdown the listener */
292 if (pListener != NULL)
293 iochan_destroy(pListener);
295 for (; pCurrentThread != NULL; pCurrentThread = pCurrentThread->pNext)
297 /* Just destroy the IOCHAN, that should do the trick */
298 iochan_destroy(pCurrentThread->pIOChannel);
300 /* Keep a running count of our handles */
306 HANDLE *pCurrentHandle ;
308 /* Allocate the thread handle array */
309 pThreadHandles = (HANDLE *)malloc(sizeof(HANDLE) * iHandles);
310 pCurrentHandle = pThreadHandles;
312 for (pCurrentThread = pFirstThread;
313 pCurrentThread != NULL;
314 pCurrentThread = pCurrentThread->pNext, pCurrentHandle++)
316 /* Just the handle */
317 *pCurrentHandle = pCurrentThread->hThread;
321 /* We can now leave the critical section */
322 LeaveCriticalSection(&Thread_CritSect);
325 /* Now we can really do something */
328 /* This will now wait, until all the threads close */
329 WaitForMultipleObjects(iHandles, pThreadHandles, TRUE, INFINITE);
331 /* Free the memory we allocated for the handle array */
332 free(pThreadHandles);
335 /* No longer require the critical section, since all threads are dead */
336 DeleteCriticalSection(&Thread_CritSect);
340 static void listener(IOCHAN h, int event)
342 COMSTACK line = (COMSTACK) iochan_getdata(h);
347 if (event == EVENT_INPUT)
349 if ((res = cs_listen(line, 0, 0)) < 0)
351 logf(LOG_FATAL, "cs_listen failed.");
356 logf(LOG_DEBUG, "listen ok");
357 iochan_setevent(h, EVENT_OUTPUT);
358 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
360 else if (event == EVENT_OUTPUT)
367 if (!(new_line = cs_accept(line)))
369 logf(LOG_FATAL, "Accept failed.");
370 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
373 logf(LOG_DEBUG, "accept ok");
375 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session, EVENT_INPUT)))
377 logf(LOG_FATAL, "Failed to create iochan");
382 logf(LOG_DEBUG, "accept ok 2");
383 if (!(newas = create_association(new_chan, new_line)))
385 logf(LOG_FATAL, "Failed to create new assoc.");
389 logf(LOG_DEBUG, "accept ok 3");
390 iochan_setdata(new_chan, newas);
391 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
392 a = cs_addrstr(new_line);
393 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
394 /* Now what we need todo is create a new thread with this iochan as
396 /* if (CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)event_loop, new_chan,
397 0, &ThreadId) == NULL) */
398 /* Somehow, somewhere we need to store this thread id, otherwise we won't be
399 able to close cleanly */
400 NewHandle = (HANDLE)_beginthreadex(NULL, 0, event_loop, new_chan, 0, &ThreadId);
401 if (NewHandle == (HANDLE)-1)
404 logf(LOG_FATAL|LOG_ERRNO, "Failed to create new thread.");
408 /* We successfully created the thread, so add it to the list */
409 statserv_add(NewHandle, new_chan);
411 logf(LOG_DEBUG, "Created new thread, iochan %p", new_chan);
412 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
416 logf(LOG_FATAL, "Bad event on listener.");
424 /* To save having an #ifdef in event_loop we need to define this empty function */
425 void statserv_remove(IOCHAN pIOChannel)
429 void statserv_closedown()
431 /* We don't need todoanything here - or do we */
432 if (pListener != NULL)
433 iochan_destroy(pListener);
436 static void listener(IOCHAN h, int event)
438 COMSTACK line = (COMSTACK) iochan_getdata(h);
441 static int child = 0;
444 if (event == EVENT_INPUT)
446 if (control_block.dynamic && !child)
452 logf(LOG_FATAL|LOG_ERRNO, "pipe");
456 if ((res = fork()) < 0)
458 logf(LOG_FATAL|LOG_ERRNO, "fork");
462 else if (res == 0) /* child */
469 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
473 COMSTACK l = iochan_getdata(pp);
478 sprintf(nbuf, "%s(%d)", me, getpid());
479 log_init(control_block.loglevel, nbuf, 0);
484 /* wait for child to take the call */
490 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
492 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
498 logf(LOG_DEBUG, "P: Child has taken the call");
503 if ((res = cs_listen(line, 0, 0)) < 0)
505 logf(LOG_FATAL, "cs_listen failed.");
510 logf(LOG_DEBUG, "listen ok");
511 iochan_setevent(h, EVENT_OUTPUT);
512 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
514 /* in dynamic mode, only the child ever comes down here */
515 else if (event == EVENT_OUTPUT)
521 if (!(new_line = cs_accept(line)))
523 logf(LOG_FATAL, "Accept failed.");
524 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
527 logf(LOG_DEBUG, "accept ok");
528 if (control_block.dynamic)
531 /* close our half of the listener socket */
532 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
534 COMSTACK l = iochan_getdata(pp);
539 logf(LOG_DEBUG, "Releasing parent");
543 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
545 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
548 logf(LOG_FATAL, "Failed to create iochan");
552 if (!(newas = create_association(new_chan, new_line)))
554 logf(LOG_FATAL, "Failed to create new assoc.");
558 iochan_setdata(new_chan, newas);
559 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
560 a = cs_addrstr(new_line);
561 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
565 logf(LOG_FATAL, "Bad event on listener.");
573 static void inetd_connection(int what)
580 if ((line = cs_createbysocket(0, tcpip_type, 0, what)))
582 if ((chan = iochan_create(cs_fileno(line), ir_session, EVENT_INPUT)))
584 if ((assoc = create_association(chan, line)))
586 iochan_setdata(chan, assoc);
587 iochan_settimeout(chan, control_block.idle_timeout * 60);
588 addr = cs_addrstr(line);
589 logf(LOG_LOG, "Inetd association from %s", addr ? addr : "[UNKNOWN]");
593 logf(LOG_FATAL, "Failed to create association structure");
598 logf(LOG_FATAL, "Failed to create iochan");
603 logf(LOG_ERRNO|LOG_FATAL, "Failed to create comstack on socket 0");
608 * Set up a listening endpoint, and give it to the event-handler.
610 static void add_listener(char *where, int what)
614 char mode[100], addr[100];
618 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
620 logf (LOG_WARN, "%s: Address format: ('tcp'|'osi')':'<address>", me);
623 if (!strcmp(mode, "tcp"))
625 else if (!strcmp(mode, "osi"))
630 logf (LOG_WARN, "OSI Transport not allowed by configuration.");
636 logf (LOG_WARN, "You must specify either 'osi:' or 'tcp:'");
639 logf(LOG_LOG, "Adding %s %s listener on %s",
640 control_block.dynamic ? "dynamic" : "static",
641 what == PROTO_SR ? "SR" : "Z3950", where);
642 if (!(l = cs_create(type, 0, what)))
644 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
646 ap = cs_straddr (l, addr);
649 fprintf(stderr, "Address resolution failed.\n");
653 if (cs_bind(l, ap, CS_SERVER) < 0)
655 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
657 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
660 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
662 iochan_setdata(lst, l);
664 /* Ensure our listener chain is setup properly */
665 lst->next = pListener;
670 /* For windows we don't need to catch the signals */
671 static void catchchld(int num)
673 while (waitpid(-1, 0, WNOHANG) > 0)
675 signal(SIGCHLD, catchchld);
679 statserv_options_block *statserv_getcontrol(void)
681 static statserv_options_block cb;
683 memcpy(&cb, &control_block, sizeof(cb));
687 void statserv_setcontrol(statserv_options_block *block)
689 memcpy(&control_block, block, sizeof(*block));
692 int statserv_main(int argc, char **argv)
694 int ret, listeners = 0, inetd = 0, r;
696 int protocol = control_block.default_proto;
699 /* We need to initialize the thread list */
700 ThreadList_Initialize();
704 while ((ret = options("a:iszSl:v:u:c:w:t:k:", argv, argc, &arg)) != -2)
709 add_listener(arg, protocol);
712 case 'z': protocol = PROTO_Z3950; break;
713 case 's': protocol = PROTO_SR; break;
714 case 'S': control_block.dynamic = 0; break;
716 strcpy(control_block.logfile, arg ? arg : "");
717 log_init(control_block.loglevel, me, control_block.logfile);
720 control_block.loglevel = log_mask_str(arg);
721 log_init(control_block.loglevel, me, control_block.logfile);
724 strcpy(control_block.apdufile, arg ? arg : ""); break;
726 strcpy(control_block.setuid, arg ? arg : ""); break;
728 strcpy(control_block.configname, arg ? arg : ""); break;
730 if (!arg || !(r = atoi(arg)))
732 fprintf(stderr, "%s: Specify positive timeout for -t.\n",
736 control_block.idle_timeout = r;
739 if (!arg || !(r = atoi(arg)))
741 fprintf(stderr, "%s: Specify positive timeout for -t.\n",
745 control_block.maxrecordsize = r * 1024;
758 fprintf(stderr, "Usage: %s [ -i -a <pdufile> -v <loglevel>"
759 " -l <logfile> -u <user> -c <config> -t <minutes>"
761 " -zsS <listener-addr> -w <directory> ... ]\n", me);
767 log_init(control_block.loglevel, NULL, control_block.logfile);
770 if ((pListener == NULL) && *control_block.default_listen)
771 add_listener(control_block.default_listen, protocol);
775 inetd_connection(protocol);
778 if (control_block.dynamic)
779 signal(SIGCHLD, catchchld);
781 if (*control_block.setuid)
785 if (!(pw = getpwnam(control_block.setuid)))
787 logf(LOG_FATAL, "%s: Unknown user", control_block.setuid);
790 if (setuid(pw->pw_uid) < 0)
792 logf(LOG_FATAL|LOG_ERRNO, "setuid");
798 logf(LOG_LOG, "Entering event loop.");
800 if (pListener == NULL)
803 return event_loop(pListener);