2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.29 1995-10-30 12:41:29 quinn
8 * Added hostname lookup for server.
10 * Revision 1.28 1995/09/29 17:12:30 quinn
13 * Revision 1.27 1995/09/27 15:03:02 quinn
14 * Modified function heads & prototypes.
16 * Revision 1.26 1995/08/29 14:44:51 quinn
19 * Revision 1.25 1995/08/29 11:18:02 quinn
20 * Added code to receive close
22 * Revision 1.24 1995/06/16 10:31:39 quinn
23 * Added session timeout.
25 * Revision 1.23 1995/06/15 12:30:48 quinn
28 * Revision 1.22 1995/06/15 07:45:17 quinn
31 * Revision 1.21 1995/06/06 08:15:40 quinn
34 * Revision 1.20 1995/05/29 08:12:09 quinn
37 * Revision 1.19 1995/05/16 09:37:27 quinn
40 * Revision 1.18 1995/05/16 08:51:09 quinn
41 * License, documentation, and memory fixes
43 * Revision 1.17 1995/05/15 11:56:42 quinn
44 * Asynchronous facilities. Restructuring of seshigh code.
46 * Revision 1.16 1995/04/10 10:23:40 quinn
47 * Some work to add scan and other things.
49 * Revision 1.15 1995/03/31 10:16:51 quinn
52 * Revision 1.14 1995/03/31 09:18:58 quinn
55 * Revision 1.13 1995/03/30 16:08:39 quinn
58 * Revision 1.12 1995/03/30 13:29:02 quinn
61 * Revision 1.11 1995/03/30 12:18:17 quinn
64 * Revision 1.10 1995/03/29 15:40:16 quinn
65 * Ongoing work. Statserv is now dynamic by default
67 * Revision 1.9 1995/03/27 08:34:30 quinn
68 * Added dynamic server functionality.
69 * Released bindings to session.c (is now redundant)
71 * Revision 1.8 1995/03/20 09:46:26 quinn
74 * Revision 1.7 1995/03/16 13:29:04 quinn
77 * Revision 1.6 1995/03/15 15:18:52 quinn
78 * Little changes to better support nonblocking I/O
81 * Revision 1.5 1995/03/15 08:37:45 quinn
82 * Now we're pretty much set for nonblocking I/O.
84 * Revision 1.4 1995/03/14 16:59:48 quinn
87 * Revision 1.3 1995/03/14 11:30:15 quinn
90 * Revision 1.2 1995/03/14 10:28:03 quinn
91 * More work on demo server.
93 * Revision 1.1 1995/03/10 18:22:45 quinn
94 * The rudiments of an asynchronous server.
99 * Simple, static server. I wouldn't advise a static server unless you
100 * really have to, but it's great for debugging memory management. :)
106 #include <sys/wait.h>
109 #include <sys/types.h>
111 #include <sys/time.h>
117 #include <comstack.h>
124 #include <statserv.h>
126 static char *me = "statserver";
130 static statserv_options_block control_block = {
131 1, /* dynamic mode */
132 LOG_DEFAULT_LEVEL, /* log level */
134 "", /* diagnostic output to stderr */
135 "tcp:@:9999", /* default listener port */
136 PROTO_Z3950, /* default application protocol */
137 60, /* idle timeout (minutes) */
138 1024*1024, /* maximum PDU size (approx.) to allow */
139 "default-config", /* configuration name to pass to backend */
144 * handle incoming connect requests.
145 * The dynamic mode is a bit tricky mostly because we want to avoid
146 * doing all of the listening and accepting in the parent - it's
149 static void listener(IOCHAN h, int event)
151 COMSTACK line = (COMSTACK) iochan_getdata(h);
154 static int child = 0;
157 if (event == EVENT_INPUT)
159 if (control_block.dynamic && !child)
165 logf(LOG_FATAL|LOG_ERRNO, "pipe");
168 if ((res = fork()) < 0)
170 logf(LOG_FATAL|LOG_ERRNO, "fork");
173 else if (res == 0) /* child */
179 sprintf(nbuf, "%s(%d)", me, getpid());
180 log_init(control_block.loglevel, nbuf, 0);
185 /* wait for child to take the call */
191 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
193 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
199 logf(LOG_DEBUG, "P: Child has taken the call");
204 if ((res = cs_listen(line, 0, 0)) < 0)
206 logf(LOG_FATAL, "cs_listen failed.");
211 logf(LOG_DEBUG, "listen ok");
212 iochan_setevent(h, EVENT_OUTPUT);
213 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
215 /* in dynamic mode, only the child ever comes down here */
216 else if (event == EVENT_OUTPUT)
222 if (!(new_line = cs_accept(line)))
224 logf(LOG_FATAL, "Accept failed.");
225 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
228 logf(LOG_DEBUG, "accept ok");
229 if (control_block.dynamic)
232 /* close our half of the listener sockets */
233 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
235 COMSTACK l = iochan_getdata(pp);
240 logf(LOG_DEBUG, "Releasing parent");
244 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
246 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
249 logf(LOG_FATAL, "Failed to create iochan");
252 if (!(newas = create_association(new_chan, new_line)))
254 logf(LOG_FATAL, "Failed to create new assoc.");
257 iochan_setdata(new_chan, newas);
258 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
259 a = cs_addrstr(new_line);
260 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
264 logf(LOG_FATAL, "Bad event on listener.");
270 * Set up a listening endpoint, and give it to the event-handler.
272 static void add_listener(char *where, int what)
276 char mode[100], addr[100];
280 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
282 fprintf(stderr, "%s: Address format: ('tcp'|'osi')':'<address>.\n",
286 if (!strcmp(mode, "tcp"))
288 if (!(ap = tcpip_strtoaddr(addr)))
290 fprintf(stderr, "Address resolution failed for TCP.\n");
295 else if (!strcmp(mode, "osi"))
298 if (!(ap = mosi_strtoaddr(addr)))
300 fprintf(stderr, "Address resolution failed for TCP.\n");
305 fprintf(stderr, "OSI Transport not allowed by configuration.\n");
311 fprintf(stderr, "You must specify either 'osi:' or 'tcp:'.\n");
314 logf(LOG_LOG, "Adding %s %s listener on %s",
315 control_block.dynamic ? "dynamic" : "static",
316 what == PROTO_SR ? "SR" : "Z3950", where);
317 if (!(l = cs_create(type, 0, what)))
319 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
322 if (cs_bind(l, ap, CS_SERVER) < 0)
324 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
327 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
330 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
333 iochan_setdata(lst, l);
336 static void catchchld(int num)
338 while (waitpid(-1, 0, WNOHANG) > 0)
340 signal(SIGCHLD, catchchld);
343 statserv_options_block *statserv_getcontrol(void)
345 static statserv_options_block cb;
347 memcpy(&cb, &control_block, sizeof(cb));
351 void statserv_setcontrol(statserv_options_block *block)
353 memcpy(&control_block, block, sizeof(*block));
356 int statserv_main(int argc, char **argv)
358 int ret, listeners = 0;
360 int protocol = control_block.default_proto;
363 while ((ret = options("a:szSl:v:u:", argv, argc, &arg)) != -2)
368 add_listener(arg, protocol);
371 case 'z': protocol = PROTO_Z3950; break;
372 case 's': protocol = PROTO_SR; break;
373 case 'S': control_block.dynamic = 0; break;
375 strcpy(control_block.logfile, arg ? arg : "");
376 log_init(control_block.loglevel, me, control_block.logfile);
379 control_block.loglevel = log_mask_str(arg);
380 log_init(control_block.loglevel, me, control_block.logfile);
383 strcpy(control_block.apdufile, arg ? arg : ""); break;
385 strcpy(control_block.setuid, arg ? arg : ""); break;
387 fprintf(stderr, "Usage: %s [ -a <pdufile> -v <loglevel> -l <logfile> -u <user> -zsS <listener-addr> ... ]\n", me);
391 if (control_block.dynamic)
392 signal(SIGCHLD, catchchld);
393 if (!listeners && *control_block.default_listen)
394 add_listener(control_block.default_listen, protocol);
395 if (*control_block.setuid)
399 if (!(pw = getpwnam(control_block.setuid)))
401 logf(LOG_FATAL, "%s: Unknown user", control_block.setuid);
404 if (setuid(pw->pw_uid) < 0)
406 logf(LOG_FATAL|LOG_ERRNO, "setuid");
410 logf(LOG_LOG, "Entering event loop.");