2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.32 1996-01-19 15:41:52 quinn
8 * *** empty log message ***
10 * Revision 1.31 1995/11/17 11:09:39 adam
11 * Added new option '-c' to specify configuration name in control block.
13 * Revision 1.30 1995/11/01 13:54:59 quinn
16 * Revision 1.29 1995/10/30 12:41:29 quinn
17 * Added hostname lookup for server.
19 * Revision 1.28 1995/09/29 17:12:30 quinn
22 * Revision 1.27 1995/09/27 15:03:02 quinn
23 * Modified function heads & prototypes.
25 * Revision 1.26 1995/08/29 14:44:51 quinn
28 * Revision 1.25 1995/08/29 11:18:02 quinn
29 * Added code to receive close
31 * Revision 1.24 1995/06/16 10:31:39 quinn
32 * Added session timeout.
34 * Revision 1.23 1995/06/15 12:30:48 quinn
37 * Revision 1.22 1995/06/15 07:45:17 quinn
40 * Revision 1.21 1995/06/06 08:15:40 quinn
43 * Revision 1.20 1995/05/29 08:12:09 quinn
46 * Revision 1.19 1995/05/16 09:37:27 quinn
49 * Revision 1.18 1995/05/16 08:51:09 quinn
50 * License, documentation, and memory fixes
52 * Revision 1.17 1995/05/15 11:56:42 quinn
53 * Asynchronous facilities. Restructuring of seshigh code.
55 * Revision 1.16 1995/04/10 10:23:40 quinn
56 * Some work to add scan and other things.
58 * Revision 1.15 1995/03/31 10:16:51 quinn
61 * Revision 1.14 1995/03/31 09:18:58 quinn
64 * Revision 1.13 1995/03/30 16:08:39 quinn
67 * Revision 1.12 1995/03/30 13:29:02 quinn
70 * Revision 1.11 1995/03/30 12:18:17 quinn
73 * Revision 1.10 1995/03/29 15:40:16 quinn
74 * Ongoing work. Statserv is now dynamic by default
76 * Revision 1.9 1995/03/27 08:34:30 quinn
77 * Added dynamic server functionality.
78 * Released bindings to session.c (is now redundant)
80 * Revision 1.8 1995/03/20 09:46:26 quinn
83 * Revision 1.7 1995/03/16 13:29:04 quinn
86 * Revision 1.6 1995/03/15 15:18:52 quinn
87 * Little changes to better support nonblocking I/O
90 * Revision 1.5 1995/03/15 08:37:45 quinn
91 * Now we're pretty much set for nonblocking I/O.
93 * Revision 1.4 1995/03/14 16:59:48 quinn
96 * Revision 1.3 1995/03/14 11:30:15 quinn
99 * Revision 1.2 1995/03/14 10:28:03 quinn
100 * More work on demo server.
102 * Revision 1.1 1995/03/10 18:22:45 quinn
103 * The rudiments of an asynchronous server.
108 * Simple, static server. I wouldn't advise a static server unless you
109 * really have to, but it's great for debugging memory management. :)
115 #include <sys/wait.h>
118 #include <sys/types.h>
120 #include <sys/time.h>
126 #include <comstack.h>
132 #include <statserv.h>
134 static char *me = "statserver";
138 static statserv_options_block control_block = {
139 1, /* dynamic mode */
140 LOG_DEFAULT_LEVEL, /* log level */
142 "", /* diagnostic output to stderr */
143 "tcp:@:9999", /* default listener port */
144 PROTO_Z3950, /* default application protocol */
145 60, /* idle timeout (minutes) */
146 1024*1024, /* maximum PDU size (approx.) to allow */
147 "default-config", /* configuration name to pass to backend */
152 * handle incoming connect requests.
153 * The dynamic mode is a bit tricky mostly because we want to avoid
154 * doing all of the listening and accepting in the parent - it's
157 static void listener(IOCHAN h, int event)
159 COMSTACK line = (COMSTACK) iochan_getdata(h);
162 static int child = 0;
165 if (event == EVENT_INPUT)
167 if (control_block.dynamic && !child)
173 logf(LOG_FATAL|LOG_ERRNO, "pipe");
176 if ((res = fork()) < 0)
178 logf(LOG_FATAL|LOG_ERRNO, "fork");
181 else if (res == 0) /* child */
187 sprintf(nbuf, "%s(%d)", me, getpid());
188 log_init(control_block.loglevel, nbuf, 0);
193 /* wait for child to take the call */
199 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
201 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
207 logf(LOG_DEBUG, "P: Child has taken the call");
212 if ((res = cs_listen(line, 0, 0)) < 0)
214 logf(LOG_FATAL, "cs_listen failed.");
219 logf(LOG_DEBUG, "listen ok");
220 iochan_setevent(h, EVENT_OUTPUT);
221 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
223 /* in dynamic mode, only the child ever comes down here */
224 else if (event == EVENT_OUTPUT)
230 if (!(new_line = cs_accept(line)))
232 logf(LOG_FATAL, "Accept failed.");
233 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
236 logf(LOG_DEBUG, "accept ok");
237 if (control_block.dynamic)
240 /* close our half of the listener socket */
241 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
243 COMSTACK l = iochan_getdata(pp);
248 logf(LOG_DEBUG, "Releasing parent");
252 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
254 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
257 logf(LOG_FATAL, "Failed to create iochan");
260 if (!(newas = create_association(new_chan, new_line)))
262 logf(LOG_FATAL, "Failed to create new assoc.");
265 iochan_setdata(new_chan, newas);
266 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
267 a = cs_addrstr(new_line);
268 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
272 logf(LOG_FATAL, "Bad event on listener.");
278 * Set up a listening endpoint, and give it to the event-handler.
280 static void add_listener(char *where, int what)
284 char mode[100], addr[100];
288 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
290 fprintf(stderr, "%s: Address format: ('tcp'|'osi')':'<address>.\n",
294 if (!strcmp(mode, "tcp"))
296 if (!(ap = tcpip_strtoaddr(addr)))
298 fprintf(stderr, "Address resolution failed for TCP.\n");
303 else if (!strcmp(mode, "osi"))
306 if (!(ap = mosi_strtoaddr(addr)))
308 fprintf(stderr, "Address resolution failed for TCP.\n");
313 fprintf(stderr, "OSI Transport not allowed by configuration.\n");
319 fprintf(stderr, "You must specify either 'osi:' or 'tcp:'.\n");
322 logf(LOG_LOG, "Adding %s %s listener on %s",
323 control_block.dynamic ? "dynamic" : "static",
324 what == PROTO_SR ? "SR" : "Z3950", where);
325 if (!(l = cs_create(type, 0, what)))
327 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
330 if (cs_bind(l, ap, CS_SERVER) < 0)
332 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
335 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
338 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
341 iochan_setdata(lst, l);
344 static void catchchld(int num)
346 while (waitpid(-1, 0, WNOHANG) > 0)
348 signal(SIGCHLD, catchchld);
351 statserv_options_block *statserv_getcontrol(void)
353 static statserv_options_block cb;
355 memcpy(&cb, &control_block, sizeof(cb));
359 void statserv_setcontrol(statserv_options_block *block)
361 memcpy(&control_block, block, sizeof(*block));
364 int statserv_main(int argc, char **argv)
366 int ret, listeners = 0;
368 int protocol = control_block.default_proto;
371 while ((ret = options("a:szSl:v:u:c:", argv, argc, &arg)) != -2)
376 add_listener(arg, protocol);
379 case 'z': protocol = PROTO_Z3950; break;
380 case 's': protocol = PROTO_SR; break;
381 case 'S': control_block.dynamic = 0; break;
383 strcpy(control_block.logfile, arg ? arg : "");
384 log_init(control_block.loglevel, me, control_block.logfile);
387 control_block.loglevel = log_mask_str(arg);
388 log_init(control_block.loglevel, me, control_block.logfile);
391 strcpy(control_block.apdufile, arg ? arg : ""); break;
393 strcpy(control_block.setuid, arg ? arg : ""); break;
395 strcpy(control_block.configname, arg ? arg : ""); break;
397 fprintf(stderr, "Usage: %s [ -a <pdufile> -v <loglevel>"
398 " -l <logfile> -u <user> -c <config>"
399 " -zsS <listener-addr> ... ]\n", me);
403 if (control_block.dynamic)
404 signal(SIGCHLD, catchchld);
405 if (!listeners && *control_block.default_listen)
406 add_listener(control_block.default_listen, protocol);
407 if (*control_block.setuid)
411 if (!(pw = getpwnam(control_block.setuid)))
413 logf(LOG_FATAL, "%s: Unknown user", control_block.setuid);
416 if (setuid(pw->pw_uid) < 0)
418 logf(LOG_FATAL|LOG_ERRNO, "setuid");
422 logf(LOG_LOG, "Entering event loop.");