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 1.39 1997-09-09 10:10:19 adam
11 * Another MSV5.0 port. Changed projects to include proper
12 * library/include paths.
13 * Server starts server in test-mode when no options are given.
15 * Revision 1.38 1997/09/04 14:19:14 adam
18 * Revision 1.37 1997/09/01 08:53:01 adam
19 * New windows NT/95 port using MSV5.0. The test server 'ztest' was
20 * moved a separate directory. MSV5.0 project server.dsp created.
21 * As an option, the server can now operate as an NT service.
23 * Revision 1.36 1996/07/06 19:58:36 quinn
24 * System headerfiles gathered in yconfig
26 * Revision 1.35 1996/05/29 10:03:28 quinn
29 * Revision 1.34 1996/02/21 13:12:07 quinn
30 * *** empty log message ***
32 * Revision 1.33 1996/02/10 12:23:49 quinn
33 * Enable inetd operations fro TCP/IP stack
35 * Revision 1.32 1996/01/19 15:41:52 quinn
36 * *** empty log message ***
38 * Revision 1.31 1995/11/17 11:09:39 adam
39 * Added new option '-c' to specify configuration name in control block.
41 * Revision 1.30 1995/11/01 13:54:59 quinn
44 * Revision 1.29 1995/10/30 12:41:29 quinn
45 * Added hostname lookup for server.
47 * Revision 1.28 1995/09/29 17:12:30 quinn
50 * Revision 1.27 1995/09/27 15:03:02 quinn
51 * Modified function heads & prototypes.
53 * Revision 1.26 1995/08/29 14:44:51 quinn
56 * Revision 1.25 1995/08/29 11:18:02 quinn
57 * Added code to receive close
59 * Revision 1.24 1995/06/16 10:31:39 quinn
60 * Added session timeout.
62 * Revision 1.23 1995/06/15 12:30:48 quinn
65 * Revision 1.22 1995/06/15 07:45:17 quinn
68 * Revision 1.21 1995/06/06 08:15:40 quinn
71 * Revision 1.20 1995/05/29 08:12:09 quinn
74 * Revision 1.19 1995/05/16 09:37:27 quinn
77 * Revision 1.18 1995/05/16 08:51:09 quinn
78 * License, documentation, and memory fixes
80 * Revision 1.17 1995/05/15 11:56:42 quinn
81 * Asynchronous facilities. Restructuring of seshigh code.
83 * Revision 1.16 1995/04/10 10:23:40 quinn
84 * Some work to add scan and other things.
86 * Revision 1.15 1995/03/31 10:16:51 quinn
89 * Revision 1.14 1995/03/31 09:18:58 quinn
92 * Revision 1.13 1995/03/30 16:08:39 quinn
95 * Revision 1.12 1995/03/30 13:29:02 quinn
98 * Revision 1.11 1995/03/30 12:18:17 quinn
101 * Revision 1.10 1995/03/29 15:40:16 quinn
102 * Ongoing work. Statserv is now dynamic by default
104 * Revision 1.9 1995/03/27 08:34:30 quinn
105 * Added dynamic server functionality.
106 * Released bindings to session.c (is now redundant)
108 * Revision 1.8 1995/03/20 09:46:26 quinn
111 * Revision 1.7 1995/03/16 13:29:04 quinn
112 * Partitioned server.
114 * Revision 1.6 1995/03/15 15:18:52 quinn
115 * Little changes to better support nonblocking I/O
118 * Revision 1.5 1995/03/15 08:37:45 quinn
119 * Now we're pretty much set for nonblocking I/O.
121 * Revision 1.4 1995/03/14 16:59:48 quinn
124 * Revision 1.3 1995/03/14 11:30:15 quinn
127 * Revision 1.2 1995/03/14 10:28:03 quinn
128 * More work on demo server.
130 * Revision 1.1 1995/03/10 18:22:45 quinn
131 * The rudiments of an asynchronous server.
152 #include <comstack.h>
158 #include <statserv.h>
160 static IOCHAN pListener;
162 static char *me = "statserver";
166 static statserv_options_block control_block = {
167 1, /* dynamic mode */
168 LOG_DEFAULT_LEVEL, /* log level */
170 "", /* diagnostic output to stderr */
171 "tcp:@:9999", /* default listener port */
172 PROTO_Z3950, /* default application protocol */
173 60, /* idle timeout (minutes) */
174 1024*1024, /* maximum PDU size (approx.) to allow */
175 "default-config", /* configuration name to pass to backend */
180 * handle incoming connect requests.
181 * The dynamic mode is a bit tricky mostly because we want to avoid
182 * doing all of the listening and accepting in the parent - it's
187 typedef struct _ThreadList ThreadList;
189 typedef struct _ThreadList
196 static ThreadList *pFirstThread;
197 static CRITICAL_SECTION Thread_CritSect;
198 static BOOL bInitialized = FALSE;
200 static void ThreadList_Initialize()
202 /* Initialize the critical Sections */
203 InitializeCriticalSection(&Thread_CritSect);
205 /* Set the first thraed */
208 /* we have been initialized */
212 static void statserv_add(HANDLE hThread, IOCHAN pIOChannel)
214 /* Only one thread can go through this section at a time */
215 EnterCriticalSection(&Thread_CritSect);
218 /* Lets create our new object */
219 ThreadList *pNewThread = (ThreadList *)malloc(sizeof(ThreadList));
220 pNewThread->hThread = hThread;
221 pNewThread->pIOChannel = pIOChannel;
222 pNewThread->pNext = pFirstThread;
223 pFirstThread = pNewThread;
225 /* Lets let somebody else create a new object now */
226 LeaveCriticalSection(&Thread_CritSect);
230 void statserv_remove(IOCHAN pIOChannel)
232 /* Only one thread can go through this section at a time */
233 EnterCriticalSection(&Thread_CritSect);
236 ThreadList *pCurrentThread = pFirstThread;
237 ThreadList *pNextThread;
238 ThreadList *pPrevThread =NULL;
240 /* Step through alll the threads */
241 for (; pCurrentThread != NULL; pCurrentThread = pNextThread)
243 /* We only need to compare on the IO Channel */
244 if (pCurrentThread->pIOChannel == pIOChannel)
246 /* We have found the thread we want to delete */
247 /* First of all reset the next pointers */
248 if (pPrevThread == NULL)
249 pFirstThread = pCurrentThread->pNext;
251 pPrevThread->pNext = pCurrentThread->pNext;
253 /* All we need todo now is delete the memory */
254 free(pCurrentThread);
256 /* No need to look at any more threads */
261 /* We need to look at another thread */
262 pNextThread = pCurrentThread->pNext;
266 /* Lets let somebody else remove an object now */
267 LeaveCriticalSection(&Thread_CritSect);
271 void statserv_closedown()
273 /* Shouldn't do anything if we are not initialized */
277 HANDLE *pThreadHandles = NULL;
279 /* We need to stop threads adding and removing while we */
280 /* start the closedown process */
281 EnterCriticalSection(&Thread_CritSect);
284 /* We have exclusive access to the thread stuff now */
285 /* Y didn't i use a semaphore - Oh well never mind */
286 ThreadList *pCurrentThread = pFirstThread;
288 /* Before we do anything else, we need to shutdown the listener */
289 if (pListener != NULL)
290 iochan_destroy(pListener);
292 for (; pCurrentThread != NULL; pCurrentThread = pCurrentThread->pNext)
294 /* Just destroy the IOCHAN, that should do the trick */
295 iochan_destroy(pCurrentThread->pIOChannel);
297 /* Keep a running count of our handles */
303 HANDLE *pCurrentHandle ;
305 /* Allocate the thread handle array */
306 pThreadHandles = (HANDLE *)malloc(sizeof(HANDLE) * iHandles);
307 pCurrentHandle = pThreadHandles;
309 for (pCurrentThread = pFirstThread;
310 pCurrentThread != NULL;
311 pCurrentThread = pCurrentThread->pNext, pCurrentHandle++)
313 /* Just the handle */
314 *pCurrentHandle = pCurrentThread->hThread;
318 /* We can now leave the critical section */
319 LeaveCriticalSection(&Thread_CritSect);
322 /* Now we can really do something */
325 /* This will now wait, until all the threads close */
326 WaitForMultipleObjects(iHandles, pThreadHandles, TRUE, INFINITE);
328 /* Free the memory we allocated for the handle array */
329 free(pThreadHandles);
332 /* No longer require the critical section, since all threads are dead */
333 DeleteCriticalSection(&Thread_CritSect);
337 static void listener(IOCHAN h, int event)
339 COMSTACK line = (COMSTACK) iochan_getdata(h);
344 if (event == EVENT_INPUT)
346 if ((res = cs_listen(line, 0, 0)) < 0)
348 logf(LOG_FATAL, "cs_listen failed.");
353 logf(LOG_DEBUG, "listen ok");
354 iochan_setevent(h, EVENT_OUTPUT);
355 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
357 else if (event == EVENT_OUTPUT)
364 if (!(new_line = cs_accept(line)))
366 logf(LOG_FATAL, "Accept failed.");
367 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
370 logf(LOG_DEBUG, "accept ok");
372 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session, EVENT_INPUT)))
374 logf(LOG_FATAL, "Failed to create iochan");
379 logf(LOG_DEBUG, "accept ok 2");
380 if (!(newas = create_association(new_chan, new_line)))
382 logf(LOG_FATAL, "Failed to create new assoc.");
386 logf(LOG_DEBUG, "accept ok 3");
387 iochan_setdata(new_chan, newas);
388 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
389 a = cs_addrstr(new_line);
390 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
391 /* Now what we need todo is create a new thread with this iochan as
393 /* if (CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)event_loop, new_chan,
394 0, &ThreadId) == NULL) */
395 /* Somehow, somewhere we need to store this thread id, otherwise we won't be
396 able to close cleanly */
397 NewHandle = (HANDLE)_beginthreadex(NULL, 0, event_loop, new_chan, 0, &ThreadId);
398 if (NewHandle == (HANDLE)-1)
401 logf(LOG_FATAL|LOG_ERRNO, "Failed to create new thread.");
405 /* We successfully created the thread, so add it to the list */
406 statserv_add(NewHandle, new_chan);
408 logf(LOG_DEBUG, "Created new thread, iochan %p", new_chan);
409 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
413 logf(LOG_FATAL, "Bad event on listener.");
421 /* To save having an #ifdef in event_loop we need to define this empty function */
422 void statserv_remove(IOCHAN pIOChannel)
426 void statserv_closedown()
428 /* We don't need todoanything here - or do we */
429 if (pListener != NULL)
430 iochan_destroy(pListener);
433 static void listener(IOCHAN h, int event)
435 COMSTACK line = (COMSTACK) iochan_getdata(h);
438 static int child = 0;
441 if (event == EVENT_INPUT)
443 if (control_block.dynamic && !child)
449 logf(LOG_FATAL|LOG_ERRNO, "pipe");
453 if ((res = fork()) < 0)
455 logf(LOG_FATAL|LOG_ERRNO, "fork");
459 else if (res == 0) /* child */
466 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
470 COMSTACK l = iochan_getdata(pp);
475 sprintf(nbuf, "%s(%d)", me, getpid());
476 log_init(control_block.loglevel, nbuf, 0);
481 /* wait for child to take the call */
487 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
489 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
495 logf(LOG_DEBUG, "P: Child has taken the call");
500 if ((res = cs_listen(line, 0, 0)) < 0)
502 logf(LOG_FATAL, "cs_listen failed.");
507 logf(LOG_DEBUG, "listen ok");
508 iochan_setevent(h, EVENT_OUTPUT);
509 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
511 /* in dynamic mode, only the child ever comes down here */
512 else if (event == EVENT_OUTPUT)
518 if (!(new_line = cs_accept(line)))
520 logf(LOG_FATAL, "Accept failed.");
521 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
524 logf(LOG_DEBUG, "accept ok");
525 if (control_block.dynamic)
528 /* close our half of the listener socket */
529 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
531 COMSTACK l = iochan_getdata(pp);
536 logf(LOG_DEBUG, "Releasing parent");
540 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
542 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
545 logf(LOG_FATAL, "Failed to create iochan");
549 if (!(newas = create_association(new_chan, new_line)))
551 logf(LOG_FATAL, "Failed to create new assoc.");
555 iochan_setdata(new_chan, newas);
556 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
557 a = cs_addrstr(new_line);
558 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
562 logf(LOG_FATAL, "Bad event on listener.");
570 static void inetd_connection(int what)
577 if ((line = cs_createbysocket(0, tcpip_type, 0, what)))
579 if ((chan = iochan_create(cs_fileno(line), ir_session, EVENT_INPUT)))
581 if ((assoc = create_association(chan, line)))
583 iochan_setdata(chan, assoc);
584 iochan_settimeout(chan, control_block.idle_timeout * 60);
585 addr = cs_addrstr(line);
586 logf(LOG_LOG, "Inetd association from %s", addr ? addr : "[UNKNOWN]");
590 logf(LOG_FATAL, "Failed to create association structure");
595 logf(LOG_FATAL, "Failed to create iochan");
600 logf(LOG_ERRNO|LOG_FATAL, "Failed to create comstack on socket 0");
605 * Set up a listening endpoint, and give it to the event-handler.
607 static void add_listener(char *where, int what)
611 char mode[100], addr[100];
615 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
617 fprintf(stderr, "%s: Address format: ('tcp'|'osi')':'<address>.\n",
620 if (!strcmp(mode, "tcp"))
622 if (!(ap = tcpip_strtoaddr(addr)))
624 fprintf(stderr, "Address resolution failed for TCP.\n");
628 else if (!strcmp(mode, "osi"))
631 if (!(ap = mosi_strtoaddr(addr)))
633 fprintf(stderr, "Address resolution failed for TCP.\n");
637 fprintf(stderr, "OSI Transport not allowed by configuration.\n");
642 fprintf(stderr, "You must specify either 'osi:' or 'tcp:'.\n");
644 logf(LOG_LOG, "Adding %s %s listener on %s",
645 control_block.dynamic ? "dynamic" : "static",
646 what == PROTO_SR ? "SR" : "Z3950", where);
647 if (!(l = cs_create(type, 0, what)))
649 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
651 if (cs_bind(l, ap, CS_SERVER) < 0)
653 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
655 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
658 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
660 iochan_setdata(lst, l);
662 /* Ensure our listener chain is setup properly */
663 lst->next = pListener;
668 /* For windows we don't need to catch the signals */
669 static void catchchld(int num)
671 while (waitpid(-1, 0, WNOHANG) > 0)
673 signal(SIGCHLD, catchchld);
677 statserv_options_block *statserv_getcontrol(void)
679 static statserv_options_block cb;
681 memcpy(&cb, &control_block, sizeof(cb));
685 void statserv_setcontrol(statserv_options_block *block)
687 memcpy(&control_block, block, sizeof(*block));
690 int statserv_main(int argc, char **argv)
692 int ret, listeners = 0, inetd = 0, r;
694 int protocol = control_block.default_proto;
697 /* We need to initialize the thread list */
698 ThreadList_Initialize();
702 while ((ret = options("a:iszSl:v:u:c:w:t:k:", argv, argc, &arg)) != -2)
707 add_listener(arg, protocol);
710 case 'z': protocol = PROTO_Z3950; break;
711 case 's': protocol = PROTO_SR; break;
712 case 'S': control_block.dynamic = 0; break;
714 strcpy(control_block.logfile, arg ? arg : "");
715 log_init(control_block.loglevel, me, control_block.logfile);
718 control_block.loglevel = log_mask_str(arg);
719 log_init(control_block.loglevel, me, control_block.logfile);
722 strcpy(control_block.apdufile, arg ? arg : ""); break;
724 strcpy(control_block.setuid, arg ? arg : ""); break;
726 strcpy(control_block.configname, arg ? arg : ""); break;
728 if (!arg || !(r = atoi(arg)))
730 fprintf(stderr, "%s: Specify positive timeout for -t.\n",
734 control_block.idle_timeout = r;
737 if (!arg || !(r = atoi(arg)))
739 fprintf(stderr, "%s: Specify positive timeout for -t.\n",
743 control_block.maxrecordsize = r * 1024;
756 fprintf(stderr, "Usage: %s [ -i -a <pdufile> -v <loglevel>"
757 " -l <logfile> -u <user> -c <config> -t <minutes>"
759 " -zsS <listener-addr> -w <directory> ... ]\n", me);
765 log_init(control_block.loglevel, NULL, control_block.logfile);
768 if ((pListener == NULL) && *control_block.default_listen)
769 add_listener(control_block.default_listen, protocol);
773 inetd_connection(protocol);
776 if (control_block.dynamic)
777 signal(SIGCHLD, catchchld);
779 if (*control_block.setuid)
783 if (!(pw = getpwnam(control_block.setuid)))
785 logf(LOG_FATAL, "%s: Unknown user", control_block.setuid);
788 if (setuid(pw->pw_uid) < 0)
790 logf(LOG_FATAL|LOG_ERRNO, "setuid");
796 logf(LOG_LOG, "Entering event loop.");
798 if (pListener == NULL)
801 return event_loop(pListener);