2 * Main source module for the Citadel server
4 * Copyright (c) 1987-2011 by the citadel.org team
6 * This program is open source software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <sys/types.h>
30 #if TIME_WITH_SYS_TIME
31 # include <sys/time.h>
35 # include <sys/time.h>
51 #include <sys/types.h>
52 #include <sys/socket.h>
53 #include <netinet/in.h>
54 #include <arpa/inet.h>
55 #include <libcitadel.h>
58 #include "sysdep_decls.h"
60 #include "citserver.h"
63 #include "housekeeping.h"
67 #include "locate_host.h"
71 #include "euidindex.h"
73 #include "svn_revision.h"
79 #include "ctdl_module.h"
81 char *unique_session_numbers;
82 int ScheduledShutdown = 0;
83 time_t server_startup_time;
85 int openid_level_supported = 0;
88 * print the actual stack frame.
90 void cit_backtrace(void)
93 void *stack_frames[50];
98 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
99 strings = backtrace_symbols(stack_frames, size);
100 for (i = 0; i < size; i++) {
102 syslog(LOG_ALERT, "%s\n", strings[i]);
104 syslog(LOG_ALERT, "%p\n", stack_frames[i]);
110 void cit_oneline_backtrace(void)
112 #ifdef HAVE_BACKTRACE
113 void *stack_frames[50];
118 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
119 strings = backtrace_symbols(stack_frames, size);
123 for (i = 1; i < size; i++) {
125 StrBufAppendPrintf(Buf, "%s : ", strings[i]);
127 StrBufAppendPrintf(Buf, "%p : ", stack_frames[i]);
130 syslog(LOG_ALERT, "%s\n", ChrPtr(Buf));
137 * print the actual stack frame.
139 void cit_panic_backtrace(int SigNum)
141 #ifdef HAVE_BACKTRACE
142 void *stack_frames[10];
146 printf("caught signal 11\n");
147 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
148 strings = backtrace_symbols(stack_frames, size);
149 for (i = 0; i < size; i++) {
151 syslog(LOG_ALERT, "%s\n", strings[i]);
153 syslog(LOG_ALERT, "%p\n", stack_frames[i]);
161 * Various things that need to be initialized at startup
163 void master_startup(void) {
167 struct ctdlroom qrbuf;
170 syslog(LOG_DEBUG, "master_startup() started\n");
171 time(&server_startup_time);
173 syslog(LOG_INFO, "Opening databases\n");
177 syslog(LOG_INFO, "Creating base rooms (if necessary)\n");
178 CtdlCreateRoom(config.c_baseroom, 0, "", 0, 1, 0, VIEW_BBS);
179 CtdlCreateRoom(AIDEROOM, 3, "", 0, 1, 0, VIEW_BBS);
180 CtdlCreateRoom(SYSCONFIGROOM, 3, "", 0, 1, 0, VIEW_BBS);
181 CtdlCreateRoom(config.c_twitroom, 0, "", 0, 1, 0, VIEW_BBS);
183 /* The "Local System Configuration" room doesn't need to be visible */
184 if (CtdlGetRoomLock(&qrbuf, SYSCONFIGROOM) == 0) {
185 qrbuf.QRflags2 |= QR2_SYSTEM;
186 CtdlPutRoomLock(&qrbuf);
189 /* Aide needs to be public postable, else we're not RFC conformant. */
190 if (CtdlGetRoomLock(&qrbuf, AIDEROOM) == 0) {
191 qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
192 CtdlPutRoomLock(&qrbuf);
195 syslog(LOG_INFO, "Seeding the pseudo-random number generator...\n");
196 urandom = fopen("/dev/urandom", "r");
197 if (urandom != NULL) {
198 rv = fread(&seed, sizeof seed, 1, urandom);
200 syslog(LOG_EMERG, "failed to read random seed: %s\n",
205 gettimeofday(&tv, NULL);
211 syslog(LOG_INFO, "Initializing ipgm secret\n");
213 config.c_ipgm_secret = rand();
216 syslog(LOG_DEBUG, "master_startup() finished\n");
221 * Cleanup routine to be called when the server is shutting down.
223 void master_cleanup(int exitcode) {
224 struct CleanupFunctionHook *fcn;
225 static int already_cleaning_up = 0;
227 if (already_cleaning_up) while(1) sleep(1);
228 already_cleaning_up = 1;
230 /* Run any cleanup routines registered by loadable modules */
231 for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
232 (*fcn->h_function_pointer)();
235 /* Close the AdjRefCount queue file */
238 /* Do system-dependent stuff */
239 sysdep_master_cleanup();
241 /* Close databases */
242 syslog(LOG_INFO, "Closing databases\n");
245 /* If the operator requested a halt but not an exit, halt here. */
246 if (shutdown_and_halt) {
247 syslog(LOG_NOTICE, "citserver: Halting server without exiting.\n");
248 fflush(stdout); fflush(stderr);
257 syslog(LOG_NOTICE, "citserver: Exiting with status %d\n", exitcode);
258 fflush(stdout); fflush(stderr);
260 if (restart_server != 0)
262 if ((running_as_daemon != 0) && ((exitcode == 0) ))
263 exitcode = CTDLEXIT_SHUTDOWN;
270 * cmd_info() - tell the client about this server
272 void cmd_info(char *cmdbuf) {
273 cprintf("%d Server info:\n", LISTING_FOLLOWS);
274 cprintf("%d\n", CC->cs_pid);
275 cprintf("%s\n", config.c_nodename);
276 cprintf("%s\n", config.c_humannode);
277 cprintf("%s\n", config.c_fqdn);
278 cprintf("%s\n", CITADEL);
279 cprintf("%d\n", REV_LEVEL);
280 cprintf("%s\n", config.c_site_location);
281 cprintf("%s\n", config.c_sysadm);
282 cprintf("%d\n", SERVER_TYPE);
283 cprintf("%s\n", config.c_moreprompt);
284 cprintf("1\n"); /* 1 = yes, this system supports floors */
285 cprintf("1\n"); /* 1 = we support the extended paging options */
286 cprintf("\n"); /* nonce no longer supported */
287 cprintf("1\n"); /* 1 = yes, this system supports the QNOP command */
290 cprintf("1\n"); /* 1 = yes, this server is LDAP-enabled */
292 cprintf("0\n"); /* 1 = no, this server is not LDAP-enabled */
295 if (config.c_auth_mode == AUTHMODE_NATIVE) {
296 cprintf("%d\n", config.c_disable_newu);
299 cprintf("1\n"); /* "create new user" does not work with non-native auth modes */
302 cprintf("%s\n", config.c_default_cal_zone);
304 /* thread load averages -- temporarily disabled during refactoring of this code */
305 cprintf("0\n"); /* load average */
306 cprintf("0\n"); /* worker average */
307 cprintf("0\n"); /* thread count */
309 cprintf("1\n"); /* yes, Sieve mail filtering is supported */
310 cprintf("%d\n", config.c_enable_fulltext);
311 cprintf("%s\n", svn_revision());
313 if (config.c_auth_mode == AUTHMODE_NATIVE) {
314 cprintf("%d\n", openid_level_supported); /* OpenID is enabled when using native auth */
317 cprintf("0\n"); /* OpenID is disabled when using non-native auth */
320 cprintf("%d\n", config.c_guest_logins);
327 * returns an asterisk if there are any instant messages waiting,
330 char CtdlCheckExpress(void) {
331 if (CC->FirstExpressMessage == NULL) {
339 void cmd_time(char *argbuf)
345 localtime_r(&tv, &tmp);
347 /* timezone and daylight global variables are not portable. */
348 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
349 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, tmp.tm_gmtoff, tmp.tm_isdst);
351 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, timezone, tmp.tm_isdst);
357 * Check originating host against the public_clients file. This determines
358 * whether the client is allowed to change the hostname for this session
359 * (for example, to show the location of the user rather than the location
362 int is_public_client(void)
368 char *public_clientspos;
369 char *public_clientsend;
372 static time_t pc_timestamp = 0;
373 static char public_clients[SIZ];
374 static char public_clients_file[SIZ];
376 #define LOCALHOSTSTR "127.0.0.1"
378 snprintf(public_clients_file, sizeof public_clients_file, "%s/public_clients", ctdl_etc_dir);
381 * Check the time stamp on the public_clients file. If it's been
382 * updated since the last time we were here (or if this is the first
383 * time we've been through the loop), read its contents and learn
384 * the IP addresses of the listed hosts.
386 if (stat(public_clients_file, &statbuf) != 0) {
387 /* No public_clients file exists, so bail out */
388 syslog(LOG_WARNING, "Warning: '%s' does not exist\n",
389 public_clients_file);
393 if (statbuf.st_mtime > pc_timestamp) {
394 begin_critical_section(S_PUBLIC_CLIENTS);
395 syslog(LOG_INFO, "Loading %s\n", public_clients_file);
397 public_clientspos = &public_clients[0];
398 public_clientsend = public_clientspos + SIZ;
399 safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
400 public_clientspos += sizeof(LOCALHOSTSTR) - 1;
402 if (hostname_to_dotted_quad(addrbuf, config.c_fqdn) == 0) {
403 *(public_clientspos++) = '|';
405 while (!IsEmptyStr (paddr) &&
406 (public_clientspos < public_clientsend))
407 *(public_clientspos++) = *(paddr++);
410 fp = fopen(public_clients_file, "r");
412 while ((fgets(buf, sizeof buf, fp)!=NULL) &&
413 (public_clientspos < public_clientsend)){
416 while (!IsEmptyStr(ptr)) {
424 while (ptr>buf && isspace(*ptr)) {
427 if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
428 *(public_clientspos++) = '|';
430 while (!IsEmptyStr(paddr) &&
431 (public_clientspos < public_clientsend)){
432 *(public_clientspos++) = *(paddr++);
437 pc_timestamp = time(NULL);
438 end_critical_section(S_PUBLIC_CLIENTS);
441 syslog(LOG_DEBUG, "Checking whether %s is a local or public client\n",
443 for (i=0; i<num_parms(public_clients); ++i) {
444 extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
445 if (!strcasecmp(CC->cs_addr, addrbuf)) {
446 syslog(LOG_DEBUG, "... yes its local.\n");
451 /* No hits. This is not a public client. */
452 syslog(LOG_DEBUG, "... no it isn't.\n");
458 * the client is identifying itself to the server
460 void cmd_iden(char *argbuf)
468 if (num_parms(argbuf)<4) {
469 cprintf("%d usage error\n", ERROR + ILLEGAL_VALUE);
473 dev_code = extract_int(argbuf,0);
474 cli_code = extract_int(argbuf,1);
475 rev_level = extract_int(argbuf,2);
476 extract_token(desc, argbuf, 3, '|', sizeof desc);
478 safestrncpy(from_host, config.c_fqdn, sizeof from_host);
479 from_host[sizeof from_host - 1] = 0;
480 if (num_parms(argbuf)>=5) extract_token(from_host, argbuf, 4, '|', sizeof from_host);
482 CC->cs_clientdev = dev_code;
483 CC->cs_clienttyp = cli_code;
484 CC->cs_clientver = rev_level;
485 safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
486 CC->cs_clientname[31] = 0;
488 /* For local sockets and public clients, trust the hostname supplied by the client */
489 if ( (CC->is_local_socket) || (is_public_client()) ) {
490 safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
491 CC->cs_host[sizeof CC->cs_host - 1] = 0;
495 syslog(LOG_NOTICE, "Client %d/%d/%01d.%02d (%s) from %s\n",
503 cprintf("%d Ok\n",CIT_OK);
506 typedef const char *ccharp;
508 * display system messages or help
510 void cmd_mesg(char *mname)
520 extract_token(buf, mname, 0, '|', sizeof buf);
522 dirs[0] = strdup(ctdl_message_dir);
523 dirs[1] = strdup(ctdl_hlp_dir);
525 snprintf(buf2, sizeof buf2, "%s.%d.%d",
526 buf, CC->cs_clientdev, CC->cs_clienttyp);
528 /* If the client requested "?" then produce a listing */
529 if (!strcmp(buf, "?")) {
530 cprintf("%d %s\n", LISTING_FOLLOWS, buf);
531 dp = opendir(dirs[1]);
533 while (d = readdir(dp), d != NULL) {
534 if (d->d_name[0] != '.') {
535 cprintf(" %s\n", d->d_name);
546 /* Otherwise, look for the requested file by name. */
548 mesg_locate(targ, sizeof targ, buf2, 2, (const ccharp*)dirs);
549 if (IsEmptyStr(targ)) {
550 snprintf(buf2, sizeof buf2, "%s.%d",
551 buf, CC->cs_clientdev);
552 mesg_locate(targ, sizeof targ, buf2, 2,
553 (const ccharp*)dirs);
554 if (IsEmptyStr(targ)) {
555 mesg_locate(targ, sizeof targ, buf, 2,
556 (const ccharp*)dirs);
564 if (IsEmptyStr(targ)) {
565 cprintf("%d '%s' not found. (Searching in %s and %s)\n",
566 ERROR + FILE_NOT_FOUND,
574 mfp = fopen(targ, "r");
576 cprintf("%d Cannot open '%s': %s\n",
577 ERROR + INTERNAL_ERROR, targ, strerror(errno));
580 cprintf("%d %s\n", LISTING_FOLLOWS,buf);
582 while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
583 buf[strlen(buf)-1] = 0;
594 * enter system messages or help
596 void cmd_emsg(char *mname)
606 if (CtdlAccessCheck(ac_aide)) return;
608 extract_token(buf, mname, 0, '|', sizeof buf);
609 for (a=0; !IsEmptyStr(&buf[a]); ++a) { /* security measure */
610 if (buf[a] == '/') buf[a] = '.';
613 dirs[0] = strdup(ctdl_message_dir);
614 dirs[1] = strdup(ctdl_hlp_dir);
616 mesg_locate(targ, sizeof targ, buf, 2, (const ccharp*)dirs);
620 if (IsEmptyStr(targ)) {
621 snprintf(targ, sizeof targ,
626 mfp = fopen(targ,"w");
628 cprintf("%d Cannot open '%s': %s\n",
629 ERROR + INTERNAL_ERROR, targ, strerror(errno));
632 cprintf("%d %s\n", SEND_LISTING, targ);
634 while (client_getln(buf, sizeof buf) >=0 && strcmp(buf, "000")) {
635 fprintf(mfp, "%s\n", buf);
642 /* Don't show the names of private rooms unless the viewing
643 * user also knows the rooms.
645 void GenerateRoomDisplay(char *real_room,
647 CitContext *viewer) {
651 strcpy(real_room, viewed->room.QRname);
652 if (viewed->room.QRflags & QR_MAILBOX) {
653 strcpy(real_room, &real_room[11]);
655 if (viewed->room.QRflags & QR_PRIVATE) {
656 CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
657 if ( (ra & UA_KNOWN) == 0) {
658 strcpy(real_room, " ");
662 if (viewed->cs_flags & CS_CHAT) {
663 while (strlen(real_room) < 14) {
664 strcat(real_room, " ");
666 strcpy(&real_room[14], "<chat>");
672 * Convenience function.
674 int CtdlAccessCheck(int required_level) {
676 if (CC->internal_pgm) return(0);
677 if (required_level >= ac_internal) {
678 cprintf("%d This is not a user-level command.\n",
679 ERROR + HIGHER_ACCESS_REQUIRED);
683 if ((required_level >= ac_logged_in_or_guest) && (CC->logged_in == 0) && (!config.c_guest_logins)) {
684 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
688 if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
689 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
693 if (CC->user.axlevel >= AxAideU) return(0);
694 if (required_level >= ac_aide) {
695 cprintf("%d This command requires Aide access.\n",
696 ERROR + HIGHER_ACCESS_REQUIRED);
700 if (is_room_aide()) return(0);
701 if (required_level >= ac_room_aide) {
702 cprintf("%d This command requires Aide or Room Aide access.\n",
703 ERROR + HIGHER_ACCESS_REQUIRED);
707 /* shhh ... succeed quietly */
714 * Terminate another running session
716 void cmd_term(char *cmdbuf)
721 session_num = extract_int(cmdbuf, 0);
723 terminated = CtdlTerminateOtherSession(session_num);
725 if (terminated < 0) {
726 cprintf("%d You can't kill your own session.\n", ERROR + ILLEGAL_VALUE);
730 if (terminated & TERM_FOUND) {
731 if (terminated == TERM_KILLED) {
732 cprintf("%d Session terminated.\n", CIT_OK);
735 cprintf("%d You are not allowed to do that.\n",
736 ERROR + HIGHER_ACCESS_REQUIRED);
740 cprintf("%d No such session.\n", ERROR + ILLEGAL_VALUE);
746 * get the paginator prompt
748 void cmd_more(char *argbuf) {
749 cprintf("%d %s\n", CIT_OK, config.c_moreprompt);
756 void cmd_echo(char *etext)
758 cprintf("%d %s\n", CIT_OK, etext);
763 * Perform privilege escalation for an internal program
765 void cmd_ipgm(char *argbuf)
769 secret = extract_int(argbuf, 0);
771 /* For security reasons, we do NOT allow this command to run
772 * over the network. Local sockets only.
774 if (!CC->is_local_socket) {
776 cprintf("%d Authentication failed.\n", ERROR + PASSWORD_REQUIRED);
778 else if (secret == config.c_ipgm_secret) {
779 CC->internal_pgm = 1;
780 strcpy(CC->curr_user, "<internal program>");
781 CC->cs_flags = CC->cs_flags|CS_STEALTH;
782 cprintf("%d Authenticated as an internal program.\n", CIT_OK);
786 cprintf("%d Authentication failed.\n", ERROR + PASSWORD_REQUIRED);
787 syslog(LOG_ERR, "Warning: ipgm authentication failed.\n");
788 CC->kill_me = KILLME_AUTHFAILED;
794 * Shut down the server
796 void cmd_down(char *argbuf) {
797 char *Reply ="%d Shutting down server. Goodbye.\n";
799 if (CtdlAccessCheck(ac_aide)) return;
801 if (!IsEmptyStr(argbuf))
804 restart_server = extract_int(argbuf, 0);
806 if (restart_server > 0)
808 Reply = "%d citserver will now shut down and automatically restart.\n";
810 if ((restart_server > 0) && !running_as_daemon)
812 syslog(LOG_ERR, "The user requested restart, but not running as daemon! Geronimooooooo!\n");
813 Reply = "%d Warning: citserver is not running in daemon mode and is therefore unlikely to restart automatically.\n";
816 cprintf(Reply, state);
820 cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN);
822 CC->kill_me = KILLME_SERVER_SHUTTING_DOWN;
823 server_shutting_down = 1;
828 * Halt the server without exiting the server process.
830 void cmd_halt(char *argbuf) {
832 if (CtdlAccessCheck(ac_aide)) return;
834 cprintf("%d Halting server. Goodbye.\n", CIT_OK);
835 server_shutting_down = 1;
836 shutdown_and_halt = 1;
841 * Schedule or cancel a server shutdown
843 void cmd_scdn(char *argbuf)
847 char *Reply = "%d %d\n";
849 if (CtdlAccessCheck(ac_aide)) return;
851 new_state = extract_int(argbuf, 0);
852 if ((new_state == 2) || (new_state == 3))
855 if (!running_as_daemon)
857 syslog(LOG_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
858 Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
862 restart_server = extract_int(argbuf, 0);
865 if ((new_state == 0) || (new_state == 1)) {
866 ScheduledShutdown = new_state;
868 cprintf(Reply, state, ScheduledShutdown);
873 * Set or unset asynchronous protocol mode
875 void cmd_asyn(char *argbuf)
879 new_state = extract_int(argbuf, 0);
880 if ((new_state == 0) || (new_state == 1)) {
881 CC->is_async = new_state;
883 cprintf("%d %d\n", CIT_OK, CC->is_async);
889 * Back-end function for starting a session
891 void begin_session(CitContext *con)
894 * Initialize some variables specific to our context.
897 con->internal_pgm = 0;
898 con->download_fp = NULL;
899 con->upload_fp = NULL;
900 con->cached_msglist = NULL;
901 con->cached_num_msgs = 0;
902 con->FirstExpressMessage = NULL;
904 time(&con->lastidle);
905 strcpy(con->lastcmdname, " ");
906 strcpy(con->cs_clientname, "(unknown)");
907 strcpy(con->curr_user, NLI);
908 *con->net_node = '\0';
909 *con->fake_username = '\0';
910 *con->fake_hostname = '\0';
911 *con->fake_roomname = '\0';
912 *con->cs_clientinfo = '\0';
913 safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
914 safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
915 con->cs_UDSclientUID = -1;
916 con->cs_host[sizeof con->cs_host - 1] = 0;
917 if (!CC->is_local_socket) {
918 locate_host(con->cs_host, sizeof con->cs_host,
919 con->cs_addr, sizeof con->cs_addr,
926 #ifdef HAVE_STRUCT_UCRED
928 /* as http://www.wsinnovations.com/softeng/articles/uds.html told us... */
929 struct ucred credentials;
930 socklen_t ucred_length = sizeof(struct ucred);
932 /*fill in the user data structure */
933 if(getsockopt(con->client_socket, SOL_SOCKET, SO_PEERCRED, &credentials, &ucred_length)) {
934 syslog(LOG_NOTICE, "could obtain credentials from unix domain socket");
938 /* the process ID of the process on the other side of the socket */
939 /* credentials.pid; */
941 /* the effective UID of the process on the other side of the socket */
942 con->cs_UDSclientUID = credentials.uid;
944 /* the effective primary GID of the process on the other side of the socket */
945 /* credentials.gid; */
947 /* To get supplemental groups, we will have to look them up in our account
948 database, after a reverse lookup on the UID to get the account name.
949 We can take this opportunity to check to see if this is a legit account.
951 snprintf(con->cs_clientinfo, sizeof(con->cs_clientinfo),
952 "PID: "F_PID_T"; UID: "F_UID_T"; GID: "F_XPID_T" ",
961 con->upload_type = UPL_FILE;
965 if (((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) || CtdlWantSingleUser()) {
969 if (!CC->is_local_socket) {
970 syslog(LOG_NOTICE, "Session (%s) started from %s (%s).\n", con->ServiceName, con->cs_host, con->cs_addr);
973 syslog(LOG_NOTICE, "Session (%s) started via local socket UID:%d.\n", con->ServiceName, con->cs_UDSclientUID);
976 /* Run any session startup routines registered by loadable modules */
977 PerformSessionHooks(EVT_START);
981 void citproto_begin_session() {
982 if (CC->nologin==1) {
983 cprintf("%d %s: Too many users are already online (maximum is %d)\n",
984 ERROR + MAX_SESSIONS_EXCEEDED,
985 config.c_nodename, config.c_maxsessions
987 CC->kill_me = KILLME_MAX_SESSIONS_EXCEEDED;
990 cprintf("%d %s Citadel server ready.\n", CIT_OK, config.c_nodename);
991 CC->can_receive_im = 1;
996 void cmd_noop(char *argbuf)
998 cprintf("%d%cok\n", CIT_OK, CtdlCheckExpress() );
1002 void cmd_qnop(char *argbuf)
1004 /* do nothing, this command returns no response */
1008 void cmd_quit(char *argbuf)
1010 cprintf("%d Goodbye.\n", CIT_OK);
1011 CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
1015 void cmd_lout(char *argbuf)
1019 cprintf("%d logged out.\n", CIT_OK);
1024 * This loop recognizes all server commands.
1026 void do_command_loop(void) {
1030 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
1031 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
1032 syslog(LOG_ERR, "Citadel client disconnected: ending session.\n");
1033 CC->kill_me = KILLME_CLIENT_DISCONNECTED;
1037 /* Log the server command, but don't show passwords... */
1038 if ( (strncasecmp(cmdbuf, "PASS", 4)) && (strncasecmp(cmdbuf, "SETP", 4)) ) {
1039 syslog(LOG_INFO, "[%d][%s(%ld)] %s",
1040 CC->cs_pid, CC->curr_user, CC->user.usernum, cmdbuf
1044 syslog(LOG_INFO, "[%d][%s(%ld)] <password command hidden from log>",
1045 CC->cs_pid, CC->curr_user, CC->user.usernum
1052 * Let other clients see the last command we executed, and
1053 * update the idle time, but not NOOP, QNOP, PEXP, GEXP, RWHO, or TIME.
1055 if ( (strncasecmp(cmdbuf, "NOOP", 4))
1056 && (strncasecmp(cmdbuf, "QNOP", 4))
1057 && (strncasecmp(cmdbuf, "PEXP", 4))
1058 && (strncasecmp(cmdbuf, "GEXP", 4))
1059 && (strncasecmp(cmdbuf, "RWHO", 4))
1060 && (strncasecmp(cmdbuf, "TIME", 4)) ) {
1061 strcpy(CC->lastcmdname, " ");
1062 safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
1063 time(&CC->lastidle);
1066 if ((strncasecmp(cmdbuf, "ENT0", 4))
1067 && (strncasecmp(cmdbuf, "MESG", 4))
1068 && (strncasecmp(cmdbuf, "MSGS", 4)))
1070 CC->cs_flags &= ~CS_POSTING;
1073 if (!DLoader_Exec_Cmd(cmdbuf)) {
1074 cprintf("%d Unrecognized or unsupported command.\n", ERROR + CMD_NOT_SUPPORTED);
1079 /* Run any after-each-command routines registered by modules */
1080 PerformSessionHooks(EVT_CMD);
1085 * This loop performs all asynchronous functions.
1087 void do_async_loop(void) {
1088 PerformSessionHooks(EVT_ASYNC);
1092 /*****************************************************************************/
1093 /* MODULE INITIALIZATION STUFF */
1094 /*****************************************************************************/
1096 CTDL_MODULE_INIT(citserver)
1099 CtdlRegisterProtoHook(cmd_noop, "NOOP", "no operation");
1100 CtdlRegisterProtoHook(cmd_qnop, "QNOP", "no operation with no response");
1101 CtdlRegisterProtoHook(cmd_quit, "QUIT", "log out and disconnect from server");
1102 CtdlRegisterProtoHook(cmd_lout, "LOUT", "log out but do not disconnect from server");
1103 CtdlRegisterProtoHook(cmd_asyn, "ASYN", "enable asynchronous server responses");
1104 CtdlRegisterProtoHook(cmd_info, "INFO", "fetch server capabilities and configuration");
1105 CtdlRegisterProtoHook(cmd_mesg, "MESG", "fetch system banners");
1106 CtdlRegisterProtoHook(cmd_emsg, "EMSG", "submit system banners");
1107 CtdlRegisterProtoHook(cmd_echo, "ECHO", "echo text back to the client");
1108 CtdlRegisterProtoHook(cmd_more, "MORE", "fetch the paginator prompt");
1109 CtdlRegisterProtoHook(cmd_iden, "IDEN", "identify the client software and location");
1110 CtdlRegisterProtoHook(cmd_ipgm, "IPGM", "perform privilege escalation for internal programs");
1111 CtdlRegisterProtoHook(cmd_term, "TERM", "terminate another running session");
1112 CtdlRegisterProtoHook(cmd_down, "DOWN", "perform a server shutdown");
1113 CtdlRegisterProtoHook(cmd_halt, "HALT", "halt the server without exiting the server process");
1114 CtdlRegisterProtoHook(cmd_scdn, "SCDN", "schedule or cancel a server shutdown");
1115 CtdlRegisterProtoHook(cmd_time, "TIME", "fetch the date and time from the server");
1117 /* return our id for the Log */