4 * Main source module for the Citadel server
14 #include <sys/types.h>
18 #if TIME_WITH_SYS_TIME
19 # include <sys/time.h>
23 # include <sys/time.h>
39 #include <sys/types.h>
40 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
43 #include <libcitadel.h>
46 #include "sysdep_decls.h"
48 #include "citserver.h"
51 #include "housekeeping.h"
55 #include "locate_host.h"
60 #include "euidindex.h"
61 #include "svn_revision.h"
67 #include "ctdl_module.h"
70 struct CitContext *ContextList = NULL;
71 struct CitContext* next_session = NULL;
72 char *unique_session_numbers;
73 int ScheduledShutdown = 0;
74 time_t server_startup_time;
78 * \brief print the actual stack frame.
80 void cit_backtrace(void)
83 void *stack_frames[50];
88 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
89 strings = backtrace_symbols(stack_frames, size);
90 for (i = 0; i < size; i++) {
92 CtdlLogPrintf(1, "%s\n", strings[i]);
94 CtdlLogPrintf(1, "%p\n", stack_frames[i]);
101 * \brief print the actual stack frame.
103 void cit_panic_backtrace(int SigNum)
105 #ifdef HAVE_BACKTRACE
106 void *stack_frames[10];
110 printf("caught signal 11\n");
111 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
112 strings = backtrace_symbols(stack_frames, size);
113 for (i = 0; i < size; i++) {
115 CtdlLogPrintf(1, "%s\n", strings[i]);
117 CtdlLogPrintf(1, "%p\n", stack_frames[i]);
125 * Various things that need to be initialized at startup
127 void master_startup(void) {
131 struct ctdlroom qrbuf;
133 CtdlLogPrintf(CTDL_DEBUG, "master_startup() started\n");
134 time(&server_startup_time);
136 CtdlLogPrintf(CTDL_INFO, "Opening databases\n");
139 ctdl_thread_internal_init_tsd();
141 CtdlThreadAllocTSD();
145 CtdlLogPrintf(CTDL_INFO, "Creating base rooms (if necessary)\n");
146 create_room(config.c_baseroom, 0, "", 0, 1, 0, VIEW_BBS);
147 create_room(AIDEROOM, 3, "", 0, 1, 0, VIEW_BBS);
148 create_room(SYSCONFIGROOM, 3, "", 0, 1, 0, VIEW_BBS);
149 create_room(config.c_twitroom, 0, "", 0, 1, 0, VIEW_BBS);
151 /* The "Local System Configuration" room doesn't need to be visible */
152 if (lgetroom(&qrbuf, SYSCONFIGROOM) == 0) {
153 qrbuf.QRflags2 |= QR2_SYSTEM;
157 /* Aide needs to be public postable, else we're not RFC conformant. */
158 if (lgetroom(&qrbuf, AIDEROOM) == 0) {
159 qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
163 CtdlLogPrintf(CTDL_INFO, "Seeding the pseudo-random number generator...\n");
164 urandom = fopen("/dev/urandom", "r");
165 if (urandom != NULL) {
166 fread(&seed, sizeof seed, 1, urandom);
170 gettimeofday(&tv, NULL);
176 CtdlLogPrintf(CTDL_INFO, "Initializing ipgm secret\n");
178 config.c_ipgm_secret = rand();
181 CtdlLogPrintf(CTDL_DEBUG, "master_startup() finished\n");
186 * Cleanup routine to be called when the server is shutting down.
188 void master_cleanup(int exitcode) {
189 struct CleanupFunctionHook *fcn;
190 static int already_cleaning_up = 0;
192 if (already_cleaning_up) while(1) sleep(1);
193 already_cleaning_up = 1;
195 /* Run any cleanup routines registered by loadable modules */
196 for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
197 (*fcn->h_function_pointer)();
200 /* Close the AdjRefCount queue file */
203 /* Do system-dependent stuff */
204 sysdep_master_cleanup();
206 /* Close databases */
207 CtdlLogPrintf(CTDL_INFO, "Closing databases\n");
210 #ifdef DEBUG_MEMORY_LEAKS
214 /* If the operator requested a halt but not an exit, halt here. */
215 if (shutdown_and_halt) {
216 CtdlLogPrintf(CTDL_NOTICE, "citserver: Halting server without exiting.\n");
217 fflush(stdout); fflush(stderr);
226 CtdlLogPrintf(CTDL_NOTICE, "citserver: Exiting with status %d\n", exitcode);
227 fflush(stdout); fflush(stderr);
229 if (restart_server != 0)
231 if ((running_as_daemon != 0) && (exitcode == 0))
232 exitcode = CTDLEXIT_SHUTDOWN;
239 * Terminate a session.
241 void RemoveContext (struct CitContext *con)
244 CtdlLogPrintf(CTDL_ERR,
245 "WARNING: RemoveContext() called with NULL!\n");
248 CtdlLogPrintf(CTDL_DEBUG, "RemoveContext() session %d\n", con->cs_pid);
250 /* Run any cleanup routines registered by loadable modules.
251 * Note: We have to "become_session()" because the cleanup functions
252 * might make references to "CC" assuming it's the right one.
256 PerformSessionHooks(EVT_STOP);
257 become_session(NULL);
259 CtdlLogPrintf(CTDL_NOTICE, "[%3d] Session ended.\n", con->cs_pid);
261 /* If the client is still connected, blow 'em away. */
262 CtdlLogPrintf(CTDL_DEBUG, "Closing socket %d\n", con->client_socket);
263 close(con->client_socket);
265 /* If using AUTHMODE_LDAP, free the DN */
271 CtdlLogPrintf(CTDL_DEBUG, "Done with RemoveContext()\n");
279 * cmd_info() - tell the client about this server
281 void cmd_info(char *cmdbuf) {
282 cprintf("%d Server info:\n", LISTING_FOLLOWS);
283 cprintf("%d\n", CC->cs_pid);
284 cprintf("%s\n", config.c_nodename);
285 cprintf("%s\n", config.c_humannode);
286 cprintf("%s\n", config.c_fqdn);
287 cprintf("%s\n", CITADEL);
288 cprintf("%d\n", REV_LEVEL);
289 cprintf("%s\n", config.c_site_location);
290 cprintf("%s\n", config.c_sysadm);
291 cprintf("%d\n", SERVER_TYPE);
292 cprintf("%s\n", config.c_moreprompt);
293 cprintf("1\n"); /* 1 = yes, this system supports floors */
294 cprintf("1\n"); /* 1 = we support the extended paging options */
295 cprintf("%s\n", CC->cs_nonce);
296 cprintf("1\n"); /* 1 = yes, this system supports the QNOP command */
299 cprintf("1\n"); /* 1 = yes, this server is LDAP-enabled */
301 cprintf("0\n"); /* 1 = no, this server is not LDAP-enabled */
304 if (config.c_auth_mode == AUTHMODE_NATIVE) {
305 cprintf("%d\n", config.c_disable_newu);
308 cprintf("1\n"); /* "create new user" does not work with non-native auth modes */
311 cprintf("%s\n", config.c_default_cal_zone);
313 /* Output load averages */
314 cprintf("%f\n", CtdlThreadLoadAvg);
315 cprintf("%f\n", CtdlThreadWorkerAvg);
316 cprintf("%d\n", CtdlThreadGetCount());
318 cprintf("1\n"); /* yes, Sieve mail filtering is supported */
319 cprintf("%d\n", config.c_enable_fulltext);
320 cprintf("%s\n", svn_revision());
322 if (config.c_auth_mode == AUTHMODE_NATIVE) {
323 cprintf("1\n"); /* OpenID is enabled when using native auth */
326 cprintf("0\n"); /* OpenID is disabled when using non-native auth */
334 * returns an asterisk if there are any instant messages waiting,
337 char CtdlCheckExpress(void) {
338 if (CC->FirstExpressMessage == NULL) {
346 void cmd_time(char *argbuf)
352 localtime_r(&tv, &tmp);
354 /* timezone and daylight global variables are not portable. */
355 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
356 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, tmp.tm_gmtoff, tmp.tm_isdst);
358 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, timezone, tmp.tm_isdst);
364 * Check originating host against the public_clients file. This determines
365 * whether the client is allowed to change the hostname for this session
366 * (for example, to show the location of the user rather than the location
369 int is_public_client(void)
375 char *public_clientspos;
376 char *public_clientsend;
379 static time_t pc_timestamp = 0;
380 static char public_clients[SIZ];
381 static char public_clients_file[SIZ];
383 #define LOCALHOSTSTR "127.0.0.1"
385 snprintf(public_clients_file,
386 sizeof public_clients_file,
391 * Check the time stamp on the public_clients file. If it's been
392 * updated since the last time we were here (or if this is the first
393 * time we've been through the loop), read its contents and learn
394 * the IP addresses of the listed hosts.
396 if (stat(public_clients_file, &statbuf) != 0) {
397 /* No public_clients file exists, so bail out */
398 CtdlLogPrintf(CTDL_WARNING, "Warning: '%s' does not exist\n",
399 public_clients_file);
403 if (statbuf.st_mtime > pc_timestamp) {
404 begin_critical_section(S_PUBLIC_CLIENTS);
405 CtdlLogPrintf(CTDL_INFO, "Loading %s\n", public_clients_file);
407 public_clientspos = &public_clients[0];
408 public_clientsend = public_clientspos + SIZ;
409 safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
410 public_clientspos += sizeof(LOCALHOSTSTR) - 1;
412 if (hostname_to_dotted_quad(addrbuf, config.c_fqdn) == 0) {
413 *(public_clientspos++) = '|';
415 while (!IsEmptyStr (paddr) &&
416 (public_clientspos < public_clientsend))
417 *(public_clientspos++) = *(paddr++);
420 fp = fopen(public_clients_file, "r");
422 while ((fgets(buf, sizeof buf, fp)!=NULL) &&
423 (public_clientspos < public_clientsend)){
426 while (!IsEmptyStr(ptr)) {
434 while (ptr>buf && isspace(*ptr)) {
437 if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
438 *(public_clientspos++) = '|';
440 while (!IsEmptyStr(paddr) &&
441 (public_clientspos < public_clientsend)){
442 *(public_clientspos++) = *(paddr++);
447 pc_timestamp = time(NULL);
448 end_critical_section(S_PUBLIC_CLIENTS);
451 CtdlLogPrintf(CTDL_DEBUG, "Checking whether %s is a local or public client\n",
453 for (i=0; i<num_parms(public_clients); ++i) {
454 extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
455 if (!strcasecmp(CC->cs_addr, addrbuf)) {
456 CtdlLogPrintf(CTDL_DEBUG, "... yes it is.\n");
461 /* No hits. This is not a public client. */
462 CtdlLogPrintf(CTDL_DEBUG, "... no it isn't.\n");
468 * the client is identifying itself to the server
470 void cmd_iden(char *argbuf)
480 if (num_parms(argbuf)<4) {
481 cprintf("%d usage error\n", ERROR + ILLEGAL_VALUE);
485 dev_code = extract_int(argbuf,0);
486 cli_code = extract_int(argbuf,1);
487 rev_level = extract_int(argbuf,2);
488 extract_token(desc, argbuf, 3, '|', sizeof desc);
490 safestrncpy(from_host, config.c_fqdn, sizeof from_host);
491 from_host[sizeof from_host - 1] = 0;
492 if (num_parms(argbuf)>=5) extract_token(from_host, argbuf, 4, '|', sizeof from_host);
494 CC->cs_clientdev = dev_code;
495 CC->cs_clienttyp = cli_code;
496 CC->cs_clientver = rev_level;
497 safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
498 CC->cs_clientname[31] = 0;
500 if (!IsEmptyStr(from_host)) {
501 if (CC->is_local_socket) do_lookup = 1;
502 else if (is_public_client()) do_lookup = 1;
506 CtdlLogPrintf(CTDL_DEBUG, "Looking up hostname '%s'\n", from_host);
507 if ((addr.s_addr = inet_addr(from_host)) != -1) {
508 locate_host(CC->cs_host, sizeof CC->cs_host,
509 CC->cs_addr, sizeof CC->cs_addr,
513 safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
514 CC->cs_host[sizeof CC->cs_host - 1] = 0;
518 CtdlLogPrintf(CTDL_NOTICE, "Client %d/%d/%01d.%02d (%s) from %s\n",
525 cprintf("%d Ok\n",CIT_OK);
530 * display system messages or help
532 void cmd_mesg(char *mname)
542 extract_token(buf, mname, 0, '|', sizeof buf);
544 dirs[0] = strdup(ctdl_message_dir);
545 dirs[1] = strdup(ctdl_hlp_dir);
547 snprintf(buf2, sizeof buf2, "%s.%d.%d",
548 buf, CC->cs_clientdev, CC->cs_clienttyp);
550 /* If the client requested "?" then produce a listing */
551 if (!strcmp(buf, "?")) {
552 cprintf("%d %s\n", LISTING_FOLLOWS, buf);
553 dp = opendir(dirs[1]);
555 while (d = readdir(dp), d != NULL) {
556 if (d->d_name[0] != '.') {
557 cprintf(" %s\n", d->d_name);
568 /* Otherwise, look for the requested file by name. */
570 mesg_locate(targ, sizeof targ, buf2, 2, (const char **)dirs);
571 if (IsEmptyStr(targ)) {
572 snprintf(buf2, sizeof buf2, "%s.%d",
573 buf, CC->cs_clientdev);
574 mesg_locate(targ, sizeof targ, buf2, 2,
575 (const char **)dirs);
576 if (IsEmptyStr(targ)) {
577 mesg_locate(targ, sizeof targ, buf, 2,
578 (const char **)dirs);
586 if (IsEmptyStr(targ)) {
587 cprintf("%d '%s' not found. (Searching in %s and %s)\n",
588 ERROR + FILE_NOT_FOUND,
596 mfp = fopen(targ, "r");
598 cprintf("%d Cannot open '%s': %s\n",
599 ERROR + INTERNAL_ERROR, targ, strerror(errno));
602 cprintf("%d %s\n", LISTING_FOLLOWS,buf);
604 while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
605 buf[strlen(buf)-1] = 0;
616 * enter system messages or help
618 void cmd_emsg(char *mname)
628 if (CtdlAccessCheck(ac_aide)) return;
630 extract_token(buf, mname, 0, '|', sizeof buf);
631 for (a=0; !IsEmptyStr(&buf[a]); ++a) { /* security measure */
632 if (buf[a] == '/') buf[a] = '.';
635 dirs[0] = strdup(ctdl_message_dir);
636 dirs[1] = strdup(ctdl_hlp_dir);
638 mesg_locate(targ, sizeof targ, buf, 2, (const char**)dirs);
642 if (IsEmptyStr(targ)) {
643 snprintf(targ, sizeof targ,
648 mfp = fopen(targ,"w");
650 cprintf("%d Cannot open '%s': %s\n",
651 ERROR + INTERNAL_ERROR, targ, strerror(errno));
654 cprintf("%d %s\n", SEND_LISTING, targ);
656 while (client_getln(buf, sizeof buf) >=0 && strcmp(buf, "000")) {
657 fprintf(mfp, "%s\n", buf);
664 /* Don't show the names of private rooms unless the viewing
665 * user also knows the rooms.
667 void GenerateRoomDisplay(char *real_room,
668 struct CitContext *viewed,
669 struct CitContext *viewer) {
673 strcpy(real_room, viewed->room.QRname);
674 if (viewed->room.QRflags & QR_MAILBOX) {
675 strcpy(real_room, &real_room[11]);
677 if (viewed->room.QRflags & QR_PRIVATE) {
678 CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
679 if ( (ra & UA_KNOWN) == 0) {
680 strcpy(real_room, "<private room>");
684 if (viewed->cs_flags & CS_CHAT) {
685 while (strlen(real_room) < 14) {
686 strcat(real_room, " ");
688 strcpy(&real_room[14], "<chat>");
694 * Convenience function.
696 int CtdlAccessCheck(int required_level) {
698 if (CC->internal_pgm) return(0);
699 if (required_level >= ac_internal) {
700 cprintf("%d This is not a user-level command.\n",
701 ERROR + HIGHER_ACCESS_REQUIRED);
705 if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
706 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
710 if (CC->user.axlevel >= 6) return(0);
711 if (required_level >= ac_aide) {
712 cprintf("%d This command requires Aide access.\n",
713 ERROR + HIGHER_ACCESS_REQUIRED);
717 if (is_room_aide()) return(0);
718 if (required_level >= ac_room_aide) {
719 cprintf("%d This command requires Aide or Room Aide access.\n",
720 ERROR + HIGHER_ACCESS_REQUIRED);
724 /* shhh ... succeed quietly */
731 * Terminate another running session
733 void cmd_term(char *cmdbuf)
736 struct CitContext *ccptr;
740 session_num = extract_int(cmdbuf, 0);
741 if (session_num == CC->cs_pid) {
742 cprintf("%d You can't kill your own session.\n", ERROR + ILLEGAL_VALUE);
746 CtdlLogPrintf(CTDL_DEBUG, "Locating session to kill\n");
747 begin_critical_section(S_SESSION_TABLE);
748 for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
749 if (session_num == ccptr->cs_pid) {
751 if ((ccptr->user.usernum == CC->user.usernum)
752 || (CC->user.axlevel >= 6)) {
761 end_critical_section(S_SESSION_TABLE);
765 cprintf("%d Session terminated.\n", CIT_OK);
768 cprintf("%d You are not allowed to do that.\n",
769 ERROR + HIGHER_ACCESS_REQUIRED);
773 cprintf("%d No such session.\n", ERROR + ILLEGAL_VALUE);
782 * get the paginator prompt
784 void cmd_more(char *argbuf) {
785 cprintf("%d %s\n", CIT_OK, config.c_moreprompt);
791 void cmd_echo(char *etext)
793 cprintf("%d %s\n", CIT_OK, etext);
799 * identify as internal program
801 void cmd_ipgm(char *argbuf)
805 secret = extract_int(argbuf, 0);
807 /* For security reasons, we do NOT allow this command to run
808 * over the network. Local sockets only.
810 if (!CC->is_local_socket) {
812 cprintf("%d Authentication failed.\n",
813 ERROR + PASSWORD_REQUIRED);
815 else if (secret == config.c_ipgm_secret) {
816 CC->internal_pgm = 1;
817 strcpy(CC->curr_user, "<internal program>");
818 CC->cs_flags = CC->cs_flags|CS_STEALTH;
819 cprintf("%d Authenticated as an internal program.\n", CIT_OK);
823 cprintf("%d Authentication failed.\n",
824 ERROR + PASSWORD_REQUIRED);
825 CtdlLogPrintf(CTDL_ERR, "Warning: ipgm authentication failed.\n");
832 * Shut down the server
834 void cmd_down(char *argbuf) {
835 char *Reply ="%d Shutting down server. Goodbye.\n";
837 if (CtdlAccessCheck(ac_aide)) return;
839 if (!IsEmptyStr(argbuf))
842 restart_server = extract_int(argbuf, 0);
844 if (restart_server > 0)
846 Reply = "%d citserver will now shut down and automatically restart.\n";
848 if ((restart_server > 0) && !running_as_daemon)
850 CtdlLogPrintf(CTDL_ERR, "The user requested restart, but not running as daemon! Geronimooooooo!\n");
851 Reply = "%d Warning: citserver is not running in daemon mode and is therefore unlikely to restart automatically.\n";
854 cprintf(Reply, state);
858 cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN);
864 * Halt the server without exiting the server process.
866 void cmd_halt(char *argbuf) {
868 if (CtdlAccessCheck(ac_aide)) return;
870 cprintf("%d Halting server. Goodbye.\n", CIT_OK);
872 shutdown_and_halt = 1;
876 * Schedule or cancel a server shutdown
878 void cmd_scdn(char *argbuf)
882 char *Reply = "%d %d\n";
884 if (CtdlAccessCheck(ac_aide)) return;
886 new_state = extract_int(argbuf, 0);
887 if ((new_state == 2) || (new_state == 3))
890 if (!running_as_daemon)
892 CtdlLogPrintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
893 Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
897 restart_server = extract_int(argbuf, 0);
900 if ((new_state == 0) || (new_state == 1)) {
901 ScheduledShutdown = new_state;
903 cprintf(Reply, state, ScheduledShutdown);
908 * Set or unset asynchronous protocol mode
910 void cmd_asyn(char *argbuf)
914 new_state = extract_int(argbuf, 0);
915 if ((new_state == 0) || (new_state == 1)) {
916 CC->is_async = new_state;
918 cprintf("%d %d\n", CIT_OK, CC->is_async);
923 * Generate a "nonce" for APOP-style authentication.
925 * RFC 1725 et al specify a PID to be placed in front of the nonce.
926 * Quoth BTX: That would be stupid.
928 void generate_nonce(struct CitContext *con) {
931 memset(con->cs_nonce, NONCE_SIZE, 0);
932 gettimeofday(&tv, NULL);
933 memset(con->cs_nonce, NONCE_SIZE, 0);
934 snprintf(con->cs_nonce, NONCE_SIZE, "<%d%ld@%s>",
935 rand(), (long)tv.tv_usec, config.c_fqdn);
942 * Back-end function for starting a session
944 void begin_session(struct CitContext *con)
947 struct sockaddr_in sin;
950 * Initialize some variables specific to our context.
953 con->internal_pgm = 0;
954 con->download_fp = NULL;
955 con->upload_fp = NULL;
956 con->FirstExpressMessage = NULL;
958 time(&con->lastidle);
959 strcpy(con->lastcmdname, " ");
960 strcpy(con->cs_clientname, "(unknown)");
961 strcpy(con->curr_user, NLI);
962 *con->net_node = '\0';
963 *con->fake_username = '\0';
964 *con->fake_hostname = '\0';
965 *con->fake_roomname = '\0';
967 safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
968 safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
969 con->cs_UDSclientUID = -1;
970 con->cs_host[sizeof con->cs_host - 1] = 0;
972 if (!CC->is_local_socket) {
973 if (!getpeername(con->client_socket, (struct sockaddr *) &sin, &len)) {
974 locate_host(con->cs_host, sizeof con->cs_host,
975 con->cs_addr, sizeof con->cs_addr,
981 strcpy(con->cs_host, "");
982 #ifdef HAVE_STRUCT_UCRED
984 /* as http://www.wsinnovations.com/softeng/articles/uds.html told us... */
985 struct ucred credentials;
986 int ucred_length = sizeof(struct ucred);
988 /*fill in the user data structure */
989 if(getsockopt(con->client_socket, SOL_SOCKET, SO_PEERCRED, &credentials, &ucred_length)) {
990 CtdlLogPrintf(CTDL_NOTICE, "could obtain credentials from unix domain socket");
994 /* the process ID of the process on the other side of the socket */
995 /* credentials.pid; */
997 /* the effective UID of the process on the other side of the socket */
998 con->cs_UDSclientUID = credentials.uid;
1000 /* the effective primary GID of the process on the other side of the socket */
1001 /* credentials.gid; */
1003 /* To get supplemental groups, we will have to look them up in our account
1004 database, after a reverse lookup on the UID to get the account name.
1005 We can take this opportunity to check to see if this is a legit account.
1012 con->upload_type = UPL_FILE;
1016 if (((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) || CtdlWantSingleUser()) {
1020 if (!CC->is_local_socket) {
1021 CtdlLogPrintf(CTDL_NOTICE, "Session started from %s [%s].\n", con->cs_host, con->cs_addr);
1024 CtdlLogPrintf(CTDL_NOTICE, "Session started via local socket.\n");
1027 /* Run any session startup routines registered by loadable modules */
1028 PerformSessionHooks(EVT_START);
1032 void citproto_begin_session() {
1033 if (CC->nologin==1) {
1034 cprintf("%d %s: Too many users are already online (maximum is %d)\n",
1035 ERROR + MAX_SESSIONS_EXCEEDED,
1036 config.c_nodename, config.c_maxsessions
1041 cprintf("%d %s Citadel server ready.\n", CIT_OK, config.c_nodename);
1042 CC->can_receive_im = 1;
1048 void cmd_noop(char *argbuf)
1050 cprintf("%d%cok\n", CIT_OK, CtdlCheckExpress() );
1053 void cmd_qnop(char *argbuf)
1055 /* do nothing, this command returns no response */
1058 void cmd_quit(char *argbuf)
1060 cprintf("%d Goodbye.\n", CIT_OK);
1064 void cmd_lout(char *argbuf)
1068 cprintf("%d logged out.\n", CIT_OK);
1072 * This loop recognizes all server commands.
1074 void do_command_loop(void) {
1076 const char *old_name = NULL;
1078 old_name = CtdlThreadName("do_command_loop");
1081 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
1082 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
1083 CtdlLogPrintf(CTDL_ERR, "Client disconnected: ending session.\n");
1085 CtdlThreadName(old_name);
1089 /* Log the server command, but don't show passwords... */
1090 if ( (strncasecmp(cmdbuf, "PASS", 4))
1091 && (strncasecmp(cmdbuf, "SETP", 4)) ) {
1092 CtdlLogPrintf(CTDL_INFO, "%s\n", cmdbuf);
1095 CtdlLogPrintf(CTDL_INFO, "<password command sent>\n");
1101 * Let other clients see the last command we executed, and
1102 * update the idle time, but not NOOP, QNOP, PEXP, GEXP, RWHO, or TIME.
1104 if ( (strncasecmp(cmdbuf, "NOOP", 4))
1105 && (strncasecmp(cmdbuf, "QNOP", 4))
1106 && (strncasecmp(cmdbuf, "PEXP", 4))
1107 && (strncasecmp(cmdbuf, "GEXP", 4))
1108 && (strncasecmp(cmdbuf, "RWHO", 4))
1109 && (strncasecmp(cmdbuf, "TIME", 4)) ) {
1110 strcpy(CC->lastcmdname, " ");
1111 safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
1112 time(&CC->lastidle);
1115 CtdlThreadName(cmdbuf);
1117 if ((strncasecmp(cmdbuf, "ENT0", 4))
1118 && (strncasecmp(cmdbuf, "MESG", 4))
1119 && (strncasecmp(cmdbuf, "MSGS", 4)))
1121 CC->cs_flags &= ~CS_POSTING;
1124 if (!DLoader_Exec_Cmd(cmdbuf)) {
1125 cprintf("%d Unrecognized or unsupported command.\n", ERROR + CMD_NOT_SUPPORTED);
1130 /* Run any after-each-command routines registered by modules */
1131 PerformSessionHooks(EVT_CMD);
1132 CtdlThreadName(old_name);
1137 * This loop performs all asynchronous functions.
1139 void do_async_loop(void) {
1140 PerformSessionHooks(EVT_ASYNC);
1149 /*****************************************************************************/
1150 /* MODULE INITIALIZATION STUFF */
1151 /*****************************************************************************/
1153 CTDL_MODULE_INIT(citserver)
1155 CtdlRegisterProtoHook(cmd_noop, "NOOP", "Autoconverted. TODO: document me.");
1156 CtdlRegisterProtoHook(cmd_qnop, "QNOP", "Autoconverted. TODO: document me.");
1157 CtdlRegisterProtoHook(cmd_quit, "QUIT", "Autoconverted. TODO: document me.");
1158 CtdlRegisterProtoHook(cmd_lout, "LOUT", "Autoconverted. TODO: document me.");
1159 CtdlRegisterProtoHook(cmd_asyn, "ASYN", "Autoconverted. TODO: document me.");
1160 CtdlRegisterProtoHook(cmd_info, "INFO", "Autoconverted. TODO: document me.");
1161 CtdlRegisterProtoHook(cmd_mesg, "MESG", "Autoconverted. TODO: document me.");
1162 CtdlRegisterProtoHook(cmd_emsg, "EMSG", "Autoconverted. TODO: document me.");
1163 CtdlRegisterProtoHook(cmd_echo, "ECHO", "Autoconverted. TODO: document me.");
1164 CtdlRegisterProtoHook(cmd_more, "MORE", "Autoconverted. TODO: document me.");
1165 CtdlRegisterProtoHook(cmd_iden, "IDEN", "Autoconverted. TODO: document me.");
1166 CtdlRegisterProtoHook(cmd_ipgm, "IPGM", "Autoconverted. TODO: document me.");
1167 CtdlRegisterProtoHook(cmd_term, "TERM", "Autoconverted. TODO: document me.");
1168 CtdlRegisterProtoHook(cmd_down, "DOWN", "Autoconverted. TODO: document me.");
1169 CtdlRegisterProtoHook(cmd_halt, "HALT", "Autoconverted. TODO: document me.");
1170 CtdlRegisterProtoHook(cmd_scdn, "SCDN", "Autoconverted. TODO: document me.");
1171 CtdlRegisterProtoHook(cmd_time, "TIME", "Autoconverted. TODO: document me.");
1172 /* return our Subversion id for the Log */