4 * Main source module for the Citadel server
6 * Copyright (c) 1987-2009 by the citadel.org team
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include <sys/types.h>
33 #if TIME_WITH_SYS_TIME
34 # include <sys/time.h>
38 # include <sys/time.h>
54 #include <sys/types.h>
55 #include <sys/socket.h>
56 #include <netinet/in.h>
57 #include <arpa/inet.h>
58 #include <libcitadel.h>
61 #include "sysdep_decls.h"
63 #include "citserver.h"
66 #include "housekeeping.h"
70 #include "locate_host.h"
75 #include "euidindex.h"
77 #include "svn_revision.h"
83 #include "ctdl_module.h"
86 char *unique_session_numbers;
87 int ScheduledShutdown = 0;
88 time_t server_startup_time;
92 * print the actual stack frame.
94 void cit_backtrace(void)
97 void *stack_frames[50];
102 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
103 strings = backtrace_symbols(stack_frames, size);
104 for (i = 0; i < size; i++) {
106 CtdlLogPrintf(1, "%s\n", strings[i]);
108 CtdlLogPrintf(1, "%p\n", stack_frames[i]);
115 * print the actual stack frame.
117 void cit_panic_backtrace(int SigNum)
119 #ifdef HAVE_BACKTRACE
120 void *stack_frames[10];
124 printf("caught signal 11\n");
125 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
126 strings = backtrace_symbols(stack_frames, size);
127 for (i = 0; i < size; i++) {
129 CtdlLogPrintf(1, "%s\n", strings[i]);
131 CtdlLogPrintf(1, "%p\n", stack_frames[i]);
139 * Various things that need to be initialized at startup
141 void master_startup(void) {
145 struct ctdlroom qrbuf;
148 CtdlLogPrintf(CTDL_DEBUG, "master_startup() started\n");
149 time(&server_startup_time);
151 CtdlLogPrintf(CTDL_INFO, "Opening databases\n");
154 ctdl_thread_internal_init_tsd();
156 CtdlThreadAllocTSD();
160 CtdlLogPrintf(CTDL_INFO, "Creating base rooms (if necessary)\n");
161 CtdlCreateRoom(config.c_baseroom, 0, "", 0, 1, 0, VIEW_BBS);
162 CtdlCreateRoom(AIDEROOM, 3, "", 0, 1, 0, VIEW_BBS);
163 CtdlCreateRoom(SYSCONFIGROOM, 3, "", 0, 1, 0, VIEW_BBS);
164 CtdlCreateRoom(config.c_twitroom, 0, "", 0, 1, 0, VIEW_BBS);
166 /* The "Local System Configuration" room doesn't need to be visible */
167 if (CtdlGetRoomLock(&qrbuf, SYSCONFIGROOM) == 0) {
168 qrbuf.QRflags2 |= QR2_SYSTEM;
169 CtdlPutRoomLock(&qrbuf);
172 /* Aide needs to be public postable, else we're not RFC conformant. */
173 if (CtdlGetRoomLock(&qrbuf, AIDEROOM) == 0) {
174 qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
175 CtdlPutRoomLock(&qrbuf);
178 CtdlLogPrintf(CTDL_INFO, "Seeding the pseudo-random number generator...\n");
179 urandom = fopen("/dev/urandom", "r");
180 if (urandom != NULL) {
181 rv = fread(&seed, sizeof seed, 1, urandom);
185 gettimeofday(&tv, NULL);
191 CtdlLogPrintf(CTDL_INFO, "Initializing ipgm secret\n");
193 config.c_ipgm_secret = rand();
196 CtdlLogPrintf(CTDL_DEBUG, "master_startup() finished\n");
201 * Cleanup routine to be called when the server is shutting down.
203 void master_cleanup(int exitcode) {
204 struct CleanupFunctionHook *fcn;
205 static int already_cleaning_up = 0;
207 if (already_cleaning_up) while(1) sleep(1);
208 already_cleaning_up = 1;
210 /* Run any cleanup routines registered by loadable modules */
211 for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
212 (*fcn->h_function_pointer)();
215 /* Close the AdjRefCount queue file */
218 /* Do system-dependent stuff */
219 sysdep_master_cleanup();
221 /* Close databases */
222 CtdlLogPrintf(CTDL_INFO, "Closing databases\n");
225 #ifdef DEBUG_MEMORY_LEAKS
229 /* If the operator requested a halt but not an exit, halt here. */
230 if (shutdown_and_halt) {
231 CtdlLogPrintf(CTDL_NOTICE, "citserver: Halting server without exiting.\n");
232 fflush(stdout); fflush(stderr);
241 CtdlLogPrintf(CTDL_NOTICE, "citserver: Exiting with status %d\n", exitcode);
242 fflush(stdout); fflush(stderr);
244 if (restart_server != 0)
246 if ((running_as_daemon != 0) && ((exitcode == 0) ))
247 exitcode = CTDLEXIT_SHUTDOWN;
254 * cmd_info() - tell the client about this server
256 void cmd_info(char *cmdbuf) {
257 cprintf("%d Server info:\n", LISTING_FOLLOWS);
258 cprintf("%d\n", CC->cs_pid);
259 cprintf("%s\n", config.c_nodename);
260 cprintf("%s\n", config.c_humannode);
261 cprintf("%s\n", config.c_fqdn);
262 cprintf("%s\n", CITADEL);
263 cprintf("%d\n", REV_LEVEL);
264 cprintf("%s\n", config.c_site_location);
265 cprintf("%s\n", config.c_sysadm);
266 cprintf("%d\n", SERVER_TYPE);
267 cprintf("%s\n", config.c_moreprompt);
268 cprintf("1\n"); /* 1 = yes, this system supports floors */
269 cprintf("1\n"); /* 1 = we support the extended paging options */
270 cprintf("%s\n", CC->cs_nonce);
271 cprintf("1\n"); /* 1 = yes, this system supports the QNOP command */
274 cprintf("1\n"); /* 1 = yes, this server is LDAP-enabled */
276 cprintf("0\n"); /* 1 = no, this server is not LDAP-enabled */
279 if (config.c_auth_mode == AUTHMODE_NATIVE) {
280 cprintf("%d\n", config.c_disable_newu);
283 cprintf("1\n"); /* "create new user" does not work with non-native auth modes */
286 cprintf("%s\n", config.c_default_cal_zone);
288 /* Output load averages */
289 cprintf("%f\n", CtdlThreadLoadAvg);
290 cprintf("%f\n", CtdlThreadWorkerAvg);
291 cprintf("%d\n", CtdlThreadGetCount());
293 cprintf("1\n"); /* yes, Sieve mail filtering is supported */
294 cprintf("%d\n", config.c_enable_fulltext);
295 cprintf("%s\n", svn_revision());
297 if (config.c_auth_mode == AUTHMODE_NATIVE) {
298 cprintf("1\n"); /* OpenID is enabled when using native auth */
301 cprintf("0\n"); /* OpenID is disabled when using non-native auth */
309 * returns an asterisk if there are any instant messages waiting,
312 char CtdlCheckExpress(void) {
313 if (CC->FirstExpressMessage == NULL) {
321 void cmd_time(char *argbuf)
327 localtime_r(&tv, &tmp);
329 /* timezone and daylight global variables are not portable. */
330 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
331 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, tmp.tm_gmtoff, tmp.tm_isdst);
333 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, timezone, tmp.tm_isdst);
339 * Check originating host against the public_clients file. This determines
340 * whether the client is allowed to change the hostname for this session
341 * (for example, to show the location of the user rather than the location
344 int is_public_client(void)
350 char *public_clientspos;
351 char *public_clientsend;
354 static time_t pc_timestamp = 0;
355 static char public_clients[SIZ];
356 static char public_clients_file[SIZ];
358 #define LOCALHOSTSTR "127.0.0.1"
360 snprintf(public_clients_file, sizeof public_clients_file, "%s/public_clients", ctdl_etc_dir);
363 * Check the time stamp on the public_clients file. If it's been
364 * updated since the last time we were here (or if this is the first
365 * time we've been through the loop), read its contents and learn
366 * the IP addresses of the listed hosts.
368 if (stat(public_clients_file, &statbuf) != 0) {
369 /* No public_clients file exists, so bail out */
370 CtdlLogPrintf(CTDL_WARNING, "Warning: '%s' does not exist\n",
371 public_clients_file);
375 if (statbuf.st_mtime > pc_timestamp) {
376 begin_critical_section(S_PUBLIC_CLIENTS);
377 CtdlLogPrintf(CTDL_INFO, "Loading %s\n", public_clients_file);
379 public_clientspos = &public_clients[0];
380 public_clientsend = public_clientspos + SIZ;
381 safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
382 public_clientspos += sizeof(LOCALHOSTSTR) - 1;
384 if (hostname_to_dotted_quad(addrbuf, config.c_fqdn) == 0) {
385 *(public_clientspos++) = '|';
387 while (!IsEmptyStr (paddr) &&
388 (public_clientspos < public_clientsend))
389 *(public_clientspos++) = *(paddr++);
392 fp = fopen(public_clients_file, "r");
394 while ((fgets(buf, sizeof buf, fp)!=NULL) &&
395 (public_clientspos < public_clientsend)){
398 while (!IsEmptyStr(ptr)) {
406 while (ptr>buf && isspace(*ptr)) {
409 if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
410 *(public_clientspos++) = '|';
412 while (!IsEmptyStr(paddr) &&
413 (public_clientspos < public_clientsend)){
414 *(public_clientspos++) = *(paddr++);
419 pc_timestamp = time(NULL);
420 end_critical_section(S_PUBLIC_CLIENTS);
423 CtdlLogPrintf(CTDL_DEBUG, "Checking whether %s is a local or public client\n",
425 for (i=0; i<num_parms(public_clients); ++i) {
426 extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
427 if (!strcasecmp(CC->cs_addr, addrbuf)) {
428 CtdlLogPrintf(CTDL_DEBUG, "... yes it is.\n");
433 /* No hits. This is not a public client. */
434 CtdlLogPrintf(CTDL_DEBUG, "... no it isn't.\n");
440 * the client is identifying itself to the server
442 void cmd_iden(char *argbuf)
452 if (num_parms(argbuf)<4) {
453 cprintf("%d usage error\n", ERROR + ILLEGAL_VALUE);
457 dev_code = extract_int(argbuf,0);
458 cli_code = extract_int(argbuf,1);
459 rev_level = extract_int(argbuf,2);
460 extract_token(desc, argbuf, 3, '|', sizeof desc);
462 safestrncpy(from_host, config.c_fqdn, sizeof from_host);
463 from_host[sizeof from_host - 1] = 0;
464 if (num_parms(argbuf)>=5) extract_token(from_host, argbuf, 4, '|', sizeof from_host);
466 CC->cs_clientdev = dev_code;
467 CC->cs_clienttyp = cli_code;
468 CC->cs_clientver = rev_level;
469 safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
470 CC->cs_clientname[31] = 0;
472 if (!IsEmptyStr(from_host)) {
473 if (CC->is_local_socket) do_lookup = 1;
474 else if (is_public_client()) do_lookup = 1;
478 CtdlLogPrintf(CTDL_DEBUG, "Looking up hostname '%s'\n", from_host);
479 if ((addr.s_addr = inet_addr(from_host)) != -1) {
480 locate_host(CC->cs_host, sizeof CC->cs_host,
481 CC->cs_addr, sizeof CC->cs_addr,
485 safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
486 CC->cs_host[sizeof CC->cs_host - 1] = 0;
490 CtdlLogPrintf(CTDL_NOTICE, "Client %d/%d/%01d.%02d (%s) from %s\n",
498 cprintf("%d Ok\n",CIT_OK);
503 * display system messages or help
505 void cmd_mesg(char *mname)
515 extract_token(buf, mname, 0, '|', sizeof buf);
517 dirs[0] = strdup(ctdl_message_dir);
518 dirs[1] = strdup(ctdl_hlp_dir);
520 snprintf(buf2, sizeof buf2, "%s.%d.%d",
521 buf, CC->cs_clientdev, CC->cs_clienttyp);
523 /* If the client requested "?" then produce a listing */
524 if (!strcmp(buf, "?")) {
525 cprintf("%d %s\n", LISTING_FOLLOWS, buf);
526 dp = opendir(dirs[1]);
528 while (d = readdir(dp), d != NULL) {
529 if (d->d_name[0] != '.') {
530 cprintf(" %s\n", d->d_name);
541 /* Otherwise, look for the requested file by name. */
543 mesg_locate(targ, sizeof targ, buf2, 2, (const char **)dirs);
544 if (IsEmptyStr(targ)) {
545 snprintf(buf2, sizeof buf2, "%s.%d",
546 buf, CC->cs_clientdev);
547 mesg_locate(targ, sizeof targ, buf2, 2,
548 (const char **)dirs);
549 if (IsEmptyStr(targ)) {
550 mesg_locate(targ, sizeof targ, buf, 2,
551 (const char **)dirs);
559 if (IsEmptyStr(targ)) {
560 cprintf("%d '%s' not found. (Searching in %s and %s)\n",
561 ERROR + FILE_NOT_FOUND,
569 mfp = fopen(targ, "r");
571 cprintf("%d Cannot open '%s': %s\n",
572 ERROR + INTERNAL_ERROR, targ, strerror(errno));
575 cprintf("%d %s\n", LISTING_FOLLOWS,buf);
577 while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
578 buf[strlen(buf)-1] = 0;
589 * enter system messages or help
591 void cmd_emsg(char *mname)
601 if (CtdlAccessCheck(ac_aide)) return;
603 extract_token(buf, mname, 0, '|', sizeof buf);
604 for (a=0; !IsEmptyStr(&buf[a]); ++a) { /* security measure */
605 if (buf[a] == '/') buf[a] = '.';
608 dirs[0] = strdup(ctdl_message_dir);
609 dirs[1] = strdup(ctdl_hlp_dir);
611 mesg_locate(targ, sizeof targ, buf, 2, (const char**)dirs);
615 if (IsEmptyStr(targ)) {
616 snprintf(targ, sizeof targ,
621 mfp = fopen(targ,"w");
623 cprintf("%d Cannot open '%s': %s\n",
624 ERROR + INTERNAL_ERROR, targ, strerror(errno));
627 cprintf("%d %s\n", SEND_LISTING, targ);
629 while (client_getln(buf, sizeof buf) >=0 && strcmp(buf, "000")) {
630 fprintf(mfp, "%s\n", buf);
637 /* Don't show the names of private rooms unless the viewing
638 * user also knows the rooms.
640 void GenerateRoomDisplay(char *real_room,
642 CitContext *viewer) {
646 strcpy(real_room, viewed->room.QRname);
647 if (viewed->room.QRflags & QR_MAILBOX) {
648 strcpy(real_room, &real_room[11]);
650 if (viewed->room.QRflags & QR_PRIVATE) {
651 CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
652 if ( (ra & UA_KNOWN) == 0) {
653 strcpy(real_room, "<private room>");
657 if (viewed->cs_flags & CS_CHAT) {
658 while (strlen(real_room) < 14) {
659 strcat(real_room, " ");
661 strcpy(&real_room[14], "<chat>");
667 * Convenience function.
669 int CtdlAccessCheck(int required_level) {
671 if (CC->internal_pgm) return(0);
672 if (required_level >= ac_internal) {
673 cprintf("%d This is not a user-level command.\n",
674 ERROR + HIGHER_ACCESS_REQUIRED);
678 if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
679 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
683 if (CC->user.axlevel >= 6) return(0);
684 if (required_level >= ac_aide) {
685 cprintf("%d This command requires Aide access.\n",
686 ERROR + HIGHER_ACCESS_REQUIRED);
690 if (is_room_aide()) return(0);
691 if (required_level >= ac_room_aide) {
692 cprintf("%d This command requires Aide or Room Aide access.\n",
693 ERROR + HIGHER_ACCESS_REQUIRED);
697 /* shhh ... succeed quietly */
704 * Terminate another running session
706 void cmd_term(char *cmdbuf)
711 session_num = extract_int(cmdbuf, 0);
713 terminated = CtdlTerminateOtherSession(session_num);
715 if (terminated < 0) {
716 cprintf("%d You can't kill your own session.\n", ERROR + ILLEGAL_VALUE);
720 if (terminated & TERM_FOUND) {
721 if (terminated == TERM_KILLED) {
722 cprintf("%d Session terminated.\n", CIT_OK);
725 cprintf("%d You are not allowed to do that.\n",
726 ERROR + HIGHER_ACCESS_REQUIRED);
730 cprintf("%d No such session.\n", ERROR + ILLEGAL_VALUE);
736 * get the paginator prompt
738 void cmd_more(char *argbuf) {
739 cprintf("%d %s\n", CIT_OK, config.c_moreprompt);
746 void cmd_echo(char *etext)
748 cprintf("%d %s\n", CIT_OK, etext);
753 * Perform privilege escalation for an internal program
755 void cmd_ipgm(char *argbuf)
759 secret = extract_int(argbuf, 0);
761 /* For security reasons, we do NOT allow this command to run
762 * over the network. Local sockets only.
764 if (!CC->is_local_socket) {
766 cprintf("%d Authentication failed.\n", ERROR + PASSWORD_REQUIRED);
768 else if (secret == config.c_ipgm_secret) {
769 CC->internal_pgm = 1;
770 strcpy(CC->curr_user, "<internal program>");
771 CC->cs_flags = CC->cs_flags|CS_STEALTH;
772 cprintf("%d Authenticated as an internal program.\n", CIT_OK);
776 cprintf("%d Authentication failed.\n", ERROR + PASSWORD_REQUIRED);
777 CtdlLogPrintf(CTDL_ERR, "Warning: ipgm authentication failed.\n");
784 * Shut down the server
786 void cmd_down(char *argbuf) {
787 char *Reply ="%d Shutting down server. Goodbye.\n";
789 if (CtdlAccessCheck(ac_aide)) return;
791 if (!IsEmptyStr(argbuf))
794 restart_server = extract_int(argbuf, 0);
796 if (restart_server > 0)
798 Reply = "%d citserver will now shut down and automatically restart.\n";
800 if ((restart_server > 0) && !running_as_daemon)
802 CtdlLogPrintf(CTDL_ERR, "The user requested restart, but not running as daemon! Geronimooooooo!\n");
803 Reply = "%d Warning: citserver is not running in daemon mode and is therefore unlikely to restart automatically.\n";
806 cprintf(Reply, state);
810 cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN);
812 CC->kill_me = 1; /* Even the DOWN command has to follow correct proceedure when disconecting */
818 * Halt the server without exiting the server process.
820 void cmd_halt(char *argbuf) {
822 if (CtdlAccessCheck(ac_aide)) return;
824 cprintf("%d Halting server. Goodbye.\n", CIT_OK);
826 shutdown_and_halt = 1;
831 * Schedule or cancel a server shutdown
833 void cmd_scdn(char *argbuf)
837 char *Reply = "%d %d\n";
839 if (CtdlAccessCheck(ac_aide)) return;
841 new_state = extract_int(argbuf, 0);
842 if ((new_state == 2) || (new_state == 3))
845 if (!running_as_daemon)
847 CtdlLogPrintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
848 Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
852 restart_server = extract_int(argbuf, 0);
855 if ((new_state == 0) || (new_state == 1)) {
856 ScheduledShutdown = new_state;
858 cprintf(Reply, state, ScheduledShutdown);
863 * Set or unset asynchronous protocol mode
865 void cmd_asyn(char *argbuf)
869 new_state = extract_int(argbuf, 0);
870 if ((new_state == 0) || (new_state == 1)) {
871 CC->is_async = new_state;
873 cprintf("%d %d\n", CIT_OK, CC->is_async);
878 * Generate a "nonce" for APOP-style authentication.
880 * RFC 1725 et al specify a PID to be placed in front of the nonce.
881 * Quoth BTX: That would be stupid.
883 void generate_nonce(CitContext *con) {
886 memset(con->cs_nonce, NONCE_SIZE, 0);
887 gettimeofday(&tv, NULL);
888 memset(con->cs_nonce, NONCE_SIZE, 0);
889 snprintf(con->cs_nonce, NONCE_SIZE, "<%d%ld@%s>",
890 rand(), (long)tv.tv_usec, config.c_fqdn);
895 * Back-end function for starting a session
897 void begin_session(CitContext *con)
900 struct sockaddr_in sin;
903 * Initialize some variables specific to our context.
906 con->internal_pgm = 0;
907 con->download_fp = NULL;
908 con->upload_fp = NULL;
909 con->FirstExpressMessage = NULL;
911 time(&con->lastidle);
912 strcpy(con->lastcmdname, " ");
913 strcpy(con->cs_clientname, "(unknown)");
914 strcpy(con->curr_user, NLI);
915 *con->net_node = '\0';
916 *con->fake_username = '\0';
917 *con->fake_hostname = '\0';
918 *con->fake_roomname = '\0';
920 safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
921 safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
922 con->cs_UDSclientUID = -1;
923 con->cs_host[sizeof con->cs_host - 1] = 0;
925 if (!CC->is_local_socket) {
926 if (!getpeername(con->client_socket, (struct sockaddr *) &sin, &len)) {
927 locate_host(con->cs_host, sizeof con->cs_host,
928 con->cs_addr, sizeof con->cs_addr,
934 strcpy(con->cs_host, "");
935 #ifdef HAVE_STRUCT_UCRED
937 /* as http://www.wsinnovations.com/softeng/articles/uds.html told us... */
938 struct ucred credentials;
939 socklen_t ucred_length = sizeof(struct ucred);
941 /*fill in the user data structure */
942 if(getsockopt(con->client_socket, SOL_SOCKET, SO_PEERCRED, &credentials, &ucred_length)) {
943 CtdlLogPrintf(CTDL_NOTICE, "could obtain credentials from unix domain socket");
947 /* the process ID of the process on the other side of the socket */
948 /* credentials.pid; */
950 /* the effective UID of the process on the other side of the socket */
951 con->cs_UDSclientUID = credentials.uid;
953 /* the effective primary GID of the process on the other side of the socket */
954 /* credentials.gid; */
956 /* To get supplemental groups, we will have to look them up in our account
957 database, after a reverse lookup on the UID to get the account name.
958 We can take this opportunity to check to see if this is a legit account.
965 con->upload_type = UPL_FILE;
969 if (((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) || CtdlWantSingleUser()) {
973 if (!CC->is_local_socket) {
974 CtdlLogPrintf(CTDL_NOTICE, "Session started from %s [%s].\n", con->cs_host, con->cs_addr);
977 CtdlLogPrintf(CTDL_NOTICE, "Session started via local socket.\n");
980 /* Run any session startup routines registered by loadable modules */
981 PerformSessionHooks(EVT_START);
985 void citproto_begin_session() {
986 if (CC->nologin==1) {
987 cprintf("%d %s: Too many users are already online (maximum is %d)\n",
988 ERROR + MAX_SESSIONS_EXCEEDED,
989 config.c_nodename, config.c_maxsessions
994 cprintf("%d %s Citadel server ready.\n", CIT_OK, config.c_nodename);
995 CC->can_receive_im = 1;
1000 void cmd_noop(char *argbuf)
1002 cprintf("%d%cok\n", CIT_OK, CtdlCheckExpress() );
1006 void cmd_qnop(char *argbuf)
1008 /* do nothing, this command returns no response */
1012 void cmd_quit(char *argbuf)
1014 cprintf("%d Goodbye.\n", CIT_OK);
1019 void cmd_lout(char *argbuf)
1023 cprintf("%d logged out.\n", CIT_OK);
1028 * This loop recognizes all server commands.
1030 void do_command_loop(void) {
1032 const char *old_name = NULL;
1034 old_name = CtdlThreadName("do_command_loop");
1037 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
1038 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
1039 CtdlLogPrintf(CTDL_ERR, "Client disconnected: ending session.\n");
1041 CtdlThreadName(old_name);
1045 /* Log the server command, but don't show passwords... */
1046 if ( (strncasecmp(cmdbuf, "PASS", 4))
1047 && (strncasecmp(cmdbuf, "SETP", 4)) ) {
1048 CtdlLogPrintf(CTDL_INFO, "%s\n", cmdbuf);
1051 CtdlLogPrintf(CTDL_INFO, "<password command sent>\n");
1057 * Let other clients see the last command we executed, and
1058 * update the idle time, but not NOOP, QNOP, PEXP, GEXP, RWHO, or TIME.
1060 if ( (strncasecmp(cmdbuf, "NOOP", 4))
1061 && (strncasecmp(cmdbuf, "QNOP", 4))
1062 && (strncasecmp(cmdbuf, "PEXP", 4))
1063 && (strncasecmp(cmdbuf, "GEXP", 4))
1064 && (strncasecmp(cmdbuf, "RWHO", 4))
1065 && (strncasecmp(cmdbuf, "TIME", 4)) ) {
1066 strcpy(CC->lastcmdname, " ");
1067 safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
1068 time(&CC->lastidle);
1071 CtdlThreadName(cmdbuf);
1073 if ((strncasecmp(cmdbuf, "ENT0", 4))
1074 && (strncasecmp(cmdbuf, "MESG", 4))
1075 && (strncasecmp(cmdbuf, "MSGS", 4)))
1077 CC->cs_flags &= ~CS_POSTING;
1080 if (!DLoader_Exec_Cmd(cmdbuf)) {
1081 cprintf("%d Unrecognized or unsupported command.\n", ERROR + CMD_NOT_SUPPORTED);
1086 /* Run any after-each-command routines registered by modules */
1087 PerformSessionHooks(EVT_CMD);
1088 CtdlThreadName(old_name);
1093 * This loop performs all asynchronous functions.
1095 void do_async_loop(void) {
1096 PerformSessionHooks(EVT_ASYNC);
1100 /*****************************************************************************/
1101 /* MODULE INITIALIZATION STUFF */
1102 /*****************************************************************************/
1104 CTDL_MODULE_INIT(citserver)
1107 CtdlRegisterProtoHook(cmd_noop, "NOOP", "no operation");
1108 CtdlRegisterProtoHook(cmd_qnop, "QNOP", "no operation with no response");
1109 CtdlRegisterProtoHook(cmd_quit, "QUIT", "log out and disconnect from server");
1110 CtdlRegisterProtoHook(cmd_lout, "LOUT", "log out but do not disconnect from server");
1111 CtdlRegisterProtoHook(cmd_asyn, "ASYN", "enable asynchronous server responses");
1112 CtdlRegisterProtoHook(cmd_info, "INFO", "fetch server capabilities and configuration");
1113 CtdlRegisterProtoHook(cmd_mesg, "MESG", "fetch system banners");
1114 CtdlRegisterProtoHook(cmd_emsg, "EMSG", "submit system banners");
1115 CtdlRegisterProtoHook(cmd_echo, "ECHO", "echo text back to the client");
1116 CtdlRegisterProtoHook(cmd_more, "MORE", "fetch the paginator prompt");
1117 CtdlRegisterProtoHook(cmd_iden, "IDEN", "identify the client software and location");
1118 CtdlRegisterProtoHook(cmd_ipgm, "IPGM", "perform privilege escalation for internal programs");
1119 CtdlRegisterProtoHook(cmd_term, "TERM", "terminate another running session");
1120 CtdlRegisterProtoHook(cmd_down, "DOWN", "perform a server shutdown");
1121 CtdlRegisterProtoHook(cmd_halt, "HALT", "halt the server without exiting the server process");
1122 CtdlRegisterProtoHook(cmd_scdn, "SCDN", "schedule or cancel a server shutdown");
1123 CtdlRegisterProtoHook(cmd_time, "TIME", "fetch the date and time from the server");
1125 /* return our Subversion id for the Log */