2 * Copyright (C) 1994, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.16 1995-04-10 10:23:40 quinn
8 * Some work to add scan and other things.
10 * Revision 1.15 1995/03/31 10:16:51 quinn
13 * Revision 1.14 1995/03/31 09:18:58 quinn
16 * Revision 1.13 1995/03/30 16:08:39 quinn
19 * Revision 1.12 1995/03/30 13:29:02 quinn
22 * Revision 1.11 1995/03/30 12:18:17 quinn
25 * Revision 1.10 1995/03/29 15:40:16 quinn
26 * Ongoing work. Statserv is now dynamic by default
28 * Revision 1.9 1995/03/27 08:34:30 quinn
29 * Added dynamic server functionality.
30 * Released bindings to session.c (is now redundant)
32 * Revision 1.8 1995/03/20 09:46:26 quinn
35 * Revision 1.7 1995/03/16 13:29:04 quinn
38 * Revision 1.6 1995/03/15 15:18:52 quinn
39 * Little changes to better support nonblocking I/O
42 * Revision 1.5 1995/03/15 08:37:45 quinn
43 * Now we're pretty much set for nonblocking I/O.
45 * Revision 1.4 1995/03/14 16:59:48 quinn
48 * Revision 1.3 1995/03/14 11:30:15 quinn
51 * Revision 1.2 1995/03/14 10:28:03 quinn
52 * More work on demo server.
54 * Revision 1.1 1995/03/10 18:22:45 quinn
55 * The rudiments of an asynchronous server.
60 * Simple, static server. I wouldn't advise a static server unless you
61 * really have to, but it's great for debugging memory management. :)
83 static char *me = "statserver";
84 int dynamic = 1; /* fork on incoming connection */
85 static int loglevel = LOG_DEFAULT_LEVEL;
88 #define DEFAULT_LISTENER "tcp:localhost:9999"
91 * handle incoming connect requests.
92 * The dynamic mode is a bit tricky mostly because we want to avoid
93 * doing all of the listening and accepting in the parent - it's
96 static void listener(IOCHAN h, int event)
98 COMSTACK line = (COMSTACK) iochan_getdata(h);
101 static int child = 0;
104 if (event == EVENT_INPUT)
106 if (dynamic && !child)
112 logf(LOG_FATAL|LOG_ERRNO, "pipe");
115 if ((res = fork()) < 0)
117 logf(LOG_FATAL|LOG_ERRNO, "fork");
120 else if (res == 0) /* child */
126 sprintf(nbuf, "%s(%d)", me, getpid());
127 log_init(loglevel, nbuf, 0);
132 /* wait for child to take the call */
138 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
140 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
146 logf(LOG_DEBUG, "P: Child has taken the call");
151 if ((res = cs_listen(line, 0, 0)) < 0)
153 logf(LOG_FATAL, "cs_listen failed.");
158 logf(LOG_DEBUG, "listen ok");
159 iochan_setevent(h, EVENT_OUTPUT);
160 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
162 /* in dynamic mode, only the child ever comes down here */
163 else if (event == EVENT_OUTPUT)
168 if (!(new_line = cs_accept(line)))
170 logf(LOG_FATAL, "Accept failed.");
171 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
174 logf(LOG_DEBUG, "accept ok");
178 /* close our half of the listener sockets */
179 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
181 COMSTACK l = iochan_getdata(pp);
186 logf(LOG_DEBUG, "Releasing parent");
190 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
192 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
195 logf(LOG_FATAL, "Failed to create iochan");
198 if (!(newas = create_association(new_chan, new_line)))
200 logf(LOG_FATAL, "Failed to create new assoc.");
203 iochan_setdata(new_chan, newas);
204 logf(LOG_LOG, "accepted connection");
208 logf(LOG_FATAL, "Bad event on listener.");
214 * Set up a listening endpoint, and give it to the event-handler.
216 static void add_listener(char *where, int what)
220 char mode[100], addr[100];
224 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
226 fprintf(stderr, "%s: Address format: ('tcp'|'osi')':'<address>.\n",
230 if (!strcmp(mode, "tcp"))
232 if (!(ap = tcpip_strtoaddr(addr)))
234 fprintf(stderr, "Address resolution failed for TCP.\n");
240 else if (!strcmp(mode, "osi"))
242 if (!(ap = mosi_strtoaddr(addr)))
244 fprintf(stderr, "Address resolution failed for TCP.\n");
252 fprintf(stderr, "You must specify either 'osi:' or 'tcp:'.\n");
255 logf(LOG_LOG, "Adding %s %s listener on %s",
256 dynamic ? "dynamic" : "static",
257 what == PROTO_SR ? "SR" : "Z3950", where);
258 if (!(l = cs_create(type, 0, what)))
260 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
263 if (cs_bind(l, ap, CS_SERVER) < 0)
265 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
268 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
271 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
274 iochan_setdata(lst, l);
277 static void catchchld(int num)
279 while (waitpid(-1, 0, WNOHANG) > 0);
280 signal(SIGCHLD, catchchld);
283 int statserv_main(int argc, char **argv)
285 int ret, listeners = 0;
287 int protocol = CS_Z3950;
291 while ((ret = options("a:szSl:v:", argv, argc, &arg)) != -2)
295 add_listener(arg, protocol);
298 case 'z': protocol = CS_Z3950; break;
299 case 's': protocol = CS_SR; break;
300 case 'S': dynamic = 0; break;
303 log_init(loglevel, me, logfile);
306 loglevel = log_mask_str(arg);
307 log_init(loglevel, me, logfile);
310 apdufile = arg; break;
312 fprintf(stderr, "Usage: %s [ -v <loglevel> -l <logfile> -zsS <listener-addr> ... ]\n", me);
316 signal(SIGCHLD, catchchld);
318 add_listener(DEFAULT_LISTENER, protocol);
319 logf(LOG_LOG, "Entering event loop.");