2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.19 1995-05-16 09:37:27 quinn
10 * Revision 1.18 1995/05/16 08:51:09 quinn
11 * License, documentation, and memory fixes
13 * Revision 1.17 1995/05/15 11:56:42 quinn
14 * Asynchronous facilities. Restructuring of seshigh code.
16 * Revision 1.16 1995/04/10 10:23:40 quinn
17 * Some work to add scan and other things.
19 * Revision 1.15 1995/03/31 10:16:51 quinn
22 * Revision 1.14 1995/03/31 09:18:58 quinn
25 * Revision 1.13 1995/03/30 16:08:39 quinn
28 * Revision 1.12 1995/03/30 13:29:02 quinn
31 * Revision 1.11 1995/03/30 12:18:17 quinn
34 * Revision 1.10 1995/03/29 15:40:16 quinn
35 * Ongoing work. Statserv is now dynamic by default
37 * Revision 1.9 1995/03/27 08:34:30 quinn
38 * Added dynamic server functionality.
39 * Released bindings to session.c (is now redundant)
41 * Revision 1.8 1995/03/20 09:46:26 quinn
44 * Revision 1.7 1995/03/16 13:29:04 quinn
47 * Revision 1.6 1995/03/15 15:18:52 quinn
48 * Little changes to better support nonblocking I/O
51 * Revision 1.5 1995/03/15 08:37:45 quinn
52 * Now we're pretty much set for nonblocking I/O.
54 * Revision 1.4 1995/03/14 16:59:48 quinn
57 * Revision 1.3 1995/03/14 11:30:15 quinn
60 * Revision 1.2 1995/03/14 10:28:03 quinn
61 * More work on demo server.
63 * Revision 1.1 1995/03/10 18:22:45 quinn
64 * The rudiments of an asynchronous server.
69 * Simple, static server. I wouldn't advise a static server unless you
70 * really have to, but it's great for debugging memory management. :)
93 static char *me = "statserver";
97 static statserv_options_block control_block = {
99 LOG_DEFAULT_LEVEL, /* log level */
101 "", /* diagnostic output to stderr */
102 "tcp:localhost:9999", /* default listener port */
103 PROTO_Z3950, /* application protocol */
104 60, /* idle timeout (minutes) */
105 1024*1024*4, /* maximum PDU size (approx.) to allow */
106 "default-config" /* configuration name to pass to backend */
109 #define DEFAULT_LISTENER "tcp:localhost:9999"
112 * handle incoming connect requests.
113 * The dynamic mode is a bit tricky mostly because we want to avoid
114 * doing all of the listening and accepting in the parent - it's
117 static void listener(IOCHAN h, int event)
119 COMSTACK line = (COMSTACK) iochan_getdata(h);
122 static int child = 0;
125 if (event == EVENT_INPUT)
127 if (control_block.dynamic && !child)
133 logf(LOG_FATAL|LOG_ERRNO, "pipe");
136 if ((res = fork()) < 0)
138 logf(LOG_FATAL|LOG_ERRNO, "fork");
141 else if (res == 0) /* child */
147 sprintf(nbuf, "%s(%d)", me, getpid());
148 log_init(control_block.loglevel, nbuf, 0);
153 /* wait for child to take the call */
159 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
161 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
167 logf(LOG_DEBUG, "P: Child has taken the call");
172 if ((res = cs_listen(line, 0, 0)) < 0)
174 logf(LOG_FATAL, "cs_listen failed.");
179 logf(LOG_DEBUG, "listen ok");
180 iochan_setevent(h, EVENT_OUTPUT);
181 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
183 /* in dynamic mode, only the child ever comes down here */
184 else if (event == EVENT_OUTPUT)
189 if (!(new_line = cs_accept(line)))
191 logf(LOG_FATAL, "Accept failed.");
192 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
195 logf(LOG_DEBUG, "accept ok");
196 if (control_block.dynamic)
199 /* close our half of the listener sockets */
200 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
202 COMSTACK l = iochan_getdata(pp);
207 logf(LOG_DEBUG, "Releasing parent");
211 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
213 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
216 logf(LOG_FATAL, "Failed to create iochan");
219 if (!(newas = create_association(new_chan, new_line)))
221 logf(LOG_FATAL, "Failed to create new assoc.");
224 iochan_setdata(new_chan, newas);
225 logf(LOG_LOG, "accepted connection");
229 logf(LOG_FATAL, "Bad event on listener.");
235 * Set up a listening endpoint, and give it to the event-handler.
237 static void add_listener(char *where, int what)
241 char mode[100], addr[100];
245 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
247 fprintf(stderr, "%s: Address format: ('tcp'|'osi')':'<address>.\n",
251 if (!strcmp(mode, "tcp"))
253 if (!(ap = tcpip_strtoaddr(addr)))
255 fprintf(stderr, "Address resolution failed for TCP.\n");
261 else if (!strcmp(mode, "osi"))
263 if (!(ap = mosi_strtoaddr(addr)))
265 fprintf(stderr, "Address resolution failed for TCP.\n");
273 fprintf(stderr, "You must specify either 'osi:' or 'tcp:'.\n");
276 logf(LOG_LOG, "Adding %s %s listener on %s",
277 control_block.dynamic ? "dynamic" : "static",
278 what == PROTO_SR ? "SR" : "Z3950", where);
279 if (!(l = cs_create(type, 0, what)))
281 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
284 if (cs_bind(l, ap, CS_SERVER) < 0)
286 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
289 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
292 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
295 iochan_setdata(lst, l);
298 static void catchchld(int num)
300 while (waitpid(-1, 0, WNOHANG) > 0);
301 signal(SIGCHLD, catchchld);
304 statserv_options_block *statserv_getcontrol(void)
306 static statserv_options_block cb;
308 memcpy(&cb, &control_block, sizeof(cb));
312 void statserv_setcontrol(statserv_options_block *block)
314 memcpy(&control_block, block, sizeof(*block));
317 int statserv_main(int argc, char **argv)
319 int ret, listeners = 0;
321 int protocol = control_block.default_proto;
324 while ((ret = options("a:szSl:v:", argv, argc, &arg)) != -2)
329 add_listener(arg, protocol);
332 case 'z': protocol = CS_Z3950; break;
333 case 's': protocol = CS_SR; break;
334 case 'S': control_block.dynamic = 0; break;
336 strcpy(control_block.logfile, arg ? arg : "");
337 log_init(control_block.loglevel, me, control_block.logfile);
340 control_block.loglevel = log_mask_str(arg);
341 log_init(control_block.loglevel, me, control_block.logfile);
344 strcpy(control_block.apdufile, arg ? arg : ""); break;
346 fprintf(stderr, "Usage: %s [ -a <apdufile> -v <loglevel> -l <logfile> -zsS <listener-addr> ... ]\n", me);
350 if (control_block.dynamic)
351 signal(SIGCHLD, catchchld);
352 if (!listeners && *control_block.default_listen)
353 add_listener(control_block.default_listen, protocol);
354 logf(LOG_LOG, "Entering event loop.");