2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.33 1996-02-10 12:23:49 quinn
8 * Enable inetd operations fro TCP/IP stack
10 * Revision 1.32 1996/01/19 15:41:52 quinn
11 * *** empty log message ***
13 * Revision 1.31 1995/11/17 11:09:39 adam
14 * Added new option '-c' to specify configuration name in control block.
16 * Revision 1.30 1995/11/01 13:54:59 quinn
19 * Revision 1.29 1995/10/30 12:41:29 quinn
20 * Added hostname lookup for server.
22 * Revision 1.28 1995/09/29 17:12:30 quinn
25 * Revision 1.27 1995/09/27 15:03:02 quinn
26 * Modified function heads & prototypes.
28 * Revision 1.26 1995/08/29 14:44:51 quinn
31 * Revision 1.25 1995/08/29 11:18:02 quinn
32 * Added code to receive close
34 * Revision 1.24 1995/06/16 10:31:39 quinn
35 * Added session timeout.
37 * Revision 1.23 1995/06/15 12:30:48 quinn
40 * Revision 1.22 1995/06/15 07:45:17 quinn
43 * Revision 1.21 1995/06/06 08:15:40 quinn
46 * Revision 1.20 1995/05/29 08:12:09 quinn
49 * Revision 1.19 1995/05/16 09:37:27 quinn
52 * Revision 1.18 1995/05/16 08:51:09 quinn
53 * License, documentation, and memory fixes
55 * Revision 1.17 1995/05/15 11:56:42 quinn
56 * Asynchronous facilities. Restructuring of seshigh code.
58 * Revision 1.16 1995/04/10 10:23:40 quinn
59 * Some work to add scan and other things.
61 * Revision 1.15 1995/03/31 10:16:51 quinn
64 * Revision 1.14 1995/03/31 09:18:58 quinn
67 * Revision 1.13 1995/03/30 16:08:39 quinn
70 * Revision 1.12 1995/03/30 13:29:02 quinn
73 * Revision 1.11 1995/03/30 12:18:17 quinn
76 * Revision 1.10 1995/03/29 15:40:16 quinn
77 * Ongoing work. Statserv is now dynamic by default
79 * Revision 1.9 1995/03/27 08:34:30 quinn
80 * Added dynamic server functionality.
81 * Released bindings to session.c (is now redundant)
83 * Revision 1.8 1995/03/20 09:46:26 quinn
86 * Revision 1.7 1995/03/16 13:29:04 quinn
89 * Revision 1.6 1995/03/15 15:18:52 quinn
90 * Little changes to better support nonblocking I/O
93 * Revision 1.5 1995/03/15 08:37:45 quinn
94 * Now we're pretty much set for nonblocking I/O.
96 * Revision 1.4 1995/03/14 16:59:48 quinn
99 * Revision 1.3 1995/03/14 11:30:15 quinn
102 * Revision 1.2 1995/03/14 10:28:03 quinn
103 * More work on demo server.
105 * Revision 1.1 1995/03/10 18:22:45 quinn
106 * The rudiments of an asynchronous server.
111 * Simple, static server. I wouldn't advise a static server unless you
112 * really have to, but it's great for debugging memory management. :)
118 #include <sys/wait.h>
121 #include <sys/types.h>
123 #include <sys/time.h>
129 #include <comstack.h>
135 #include <statserv.h>
137 static char *me = "statserver";
141 static statserv_options_block control_block = {
142 1, /* dynamic mode */
143 LOG_DEFAULT_LEVEL, /* log level */
145 "", /* diagnostic output to stderr */
146 "tcp:@:9999", /* default listener port */
147 PROTO_Z3950, /* default application protocol */
148 60, /* idle timeout (minutes) */
149 1024*1024, /* maximum PDU size (approx.) to allow */
150 "default-config", /* configuration name to pass to backend */
155 * handle incoming connect requests.
156 * The dynamic mode is a bit tricky mostly because we want to avoid
157 * doing all of the listening and accepting in the parent - it's
160 static void listener(IOCHAN h, int event)
162 COMSTACK line = (COMSTACK) iochan_getdata(h);
165 static int child = 0;
168 if (event == EVENT_INPUT)
170 if (control_block.dynamic && !child)
176 logf(LOG_FATAL|LOG_ERRNO, "pipe");
179 if ((res = fork()) < 0)
181 logf(LOG_FATAL|LOG_ERRNO, "fork");
184 else if (res == 0) /* child */
190 sprintf(nbuf, "%s(%d)", me, getpid());
191 log_init(control_block.loglevel, nbuf, 0);
196 /* wait for child to take the call */
202 if ((res = read(hand[0], dummy, 1)) < 0 && errno != EINTR)
204 logf(LOG_FATAL|LOG_ERRNO, "handshake read");
210 logf(LOG_DEBUG, "P: Child has taken the call");
215 if ((res = cs_listen(line, 0, 0)) < 0)
217 logf(LOG_FATAL, "cs_listen failed.");
222 logf(LOG_DEBUG, "listen ok");
223 iochan_setevent(h, EVENT_OUTPUT);
224 iochan_setflags(h, EVENT_OUTPUT | EVENT_EXCEPT); /* set up for acpt */
226 /* in dynamic mode, only the child ever comes down here */
227 else if (event == EVENT_OUTPUT)
233 if (!(new_line = cs_accept(line)))
235 logf(LOG_FATAL, "Accept failed.");
236 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
239 logf(LOG_DEBUG, "accept ok");
240 if (control_block.dynamic)
243 /* close our half of the listener socket */
244 for (pp = iochan_getchan(); pp; pp = iochan_getnext(pp))
246 COMSTACK l = iochan_getdata(pp);
251 logf(LOG_DEBUG, "Releasing parent");
255 iochan_setflags(h, EVENT_INPUT | EVENT_EXCEPT); /* reset listener */
257 if (!(new_chan = iochan_create(cs_fileno(new_line), ir_session,
260 logf(LOG_FATAL, "Failed to create iochan");
263 if (!(newas = create_association(new_chan, new_line)))
265 logf(LOG_FATAL, "Failed to create new assoc.");
268 iochan_setdata(new_chan, newas);
269 iochan_settimeout(new_chan, control_block.idle_timeout * 60);
270 a = cs_addrstr(new_line);
271 logf(LOG_LOG, "Accepted connection from %s", a ? a : "[Unknown]");
275 logf(LOG_FATAL, "Bad event on listener.");
280 static void inetd_connection(int what)
287 if (!(line = cs_createbysocket(0, tcpip_type, 0, what)))
289 logf(LOG_ERRNO|LOG_FATAL, "Failed to create comstack on socket 0");
292 if (!(chan = iochan_create(cs_fileno(line), ir_session, EVENT_INPUT)))
294 logf(LOG_FATAL, "Failed to create iochan");
297 if (!(assoc = create_association(chan, line)))
299 logf(LOG_FATAL, "Failed to create association structure");
302 iochan_setdata(chan, assoc);
303 iochan_settimeout(chan, control_block.idle_timeout * 60);
304 addr = cs_addrstr(line);
305 logf(LOG_LOG, "Inetd association from %s", addr ? addr : "[UNKNOWN]");
309 * Set up a listening endpoint, and give it to the event-handler.
311 static void add_listener(char *where, int what)
315 char mode[100], addr[100];
319 if (!where || sscanf(where, "%[^:]:%s", mode, addr) != 2)
321 fprintf(stderr, "%s: Address format: ('tcp'|'osi')':'<address>.\n",
325 if (!strcmp(mode, "tcp"))
327 if (!(ap = tcpip_strtoaddr(addr)))
329 fprintf(stderr, "Address resolution failed for TCP.\n");
334 else if (!strcmp(mode, "osi"))
337 if (!(ap = mosi_strtoaddr(addr)))
339 fprintf(stderr, "Address resolution failed for TCP.\n");
344 fprintf(stderr, "OSI Transport not allowed by configuration.\n");
350 fprintf(stderr, "You must specify either 'osi:' or 'tcp:'.\n");
353 logf(LOG_LOG, "Adding %s %s listener on %s",
354 control_block.dynamic ? "dynamic" : "static",
355 what == PROTO_SR ? "SR" : "Z3950", where);
356 if (!(l = cs_create(type, 0, what)))
358 logf(LOG_FATAL|LOG_ERRNO, "Failed to create listener");
361 if (cs_bind(l, ap, CS_SERVER) < 0)
363 logf(LOG_FATAL|LOG_ERRNO, "Failed to bind to %s", where);
366 if (!(lst = iochan_create(cs_fileno(l), listener, EVENT_INPUT |
369 logf(LOG_FATAL|LOG_ERRNO, "Failed to create IOCHAN-type");
372 iochan_setdata(lst, l);
375 static void catchchld(int num)
377 while (waitpid(-1, 0, WNOHANG) > 0)
379 signal(SIGCHLD, catchchld);
382 statserv_options_block *statserv_getcontrol(void)
384 static statserv_options_block cb;
386 memcpy(&cb, &control_block, sizeof(cb));
390 void statserv_setcontrol(statserv_options_block *block)
392 memcpy(&control_block, block, sizeof(*block));
395 int statserv_main(int argc, char **argv)
397 int ret, listeners = 0, inetd = 0;
399 int protocol = control_block.default_proto;
402 while ((ret = options("a:iszSl:v:u:c:w:", argv, argc, &arg)) != -2)
407 add_listener(arg, protocol);
410 case 'z': protocol = PROTO_Z3950; break;
411 case 's': protocol = PROTO_SR; break;
412 case 'S': control_block.dynamic = 0; break;
414 strcpy(control_block.logfile, arg ? arg : "");
415 log_init(control_block.loglevel, me, control_block.logfile);
418 control_block.loglevel = log_mask_str(arg);
419 log_init(control_block.loglevel, me, control_block.logfile);
422 strcpy(control_block.apdufile, arg ? arg : ""); break;
424 strcpy(control_block.setuid, arg ? arg : ""); break;
426 strcpy(control_block.configname, arg ? arg : ""); break;
437 fprintf(stderr, "Usage: %s [ -i -a <pdufile> -v <loglevel>"
438 " -l <logfile> -u <user> -c <config>"
439 " -zsS <listener-addr> -w <directory> ... ]\n", me);
444 inetd_connection(protocol);
447 if (control_block.dynamic)
448 signal(SIGCHLD, catchchld);
449 if (!listeners && *control_block.default_listen)
450 add_listener(control_block.default_listen, protocol);
452 if (*control_block.setuid)
456 if (!(pw = getpwnam(control_block.setuid)))
458 logf(LOG_FATAL, "%s: Unknown user", control_block.setuid);
461 if (setuid(pw->pw_uid) < 0)
463 logf(LOG_FATAL|LOG_ERRNO, "setuid");
467 logf(LOG_LOG, "Entering event loop.");