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"
76 #include "svn_revision.h"
82 #include "ctdl_module.h"
85 struct CitContext *ContextList = NULL;
86 struct CitContext* next_session = NULL;
87 char *unique_session_numbers;
88 int ScheduledShutdown = 0;
89 time_t server_startup_time;
93 * \brief print the actual stack frame.
95 void cit_backtrace(void)
98 void *stack_frames[50];
103 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
104 strings = backtrace_symbols(stack_frames, size);
105 for (i = 0; i < size; i++) {
107 CtdlLogPrintf(1, "%s\n", strings[i]);
109 CtdlLogPrintf(1, "%p\n", stack_frames[i]);
116 * \brief print the actual stack frame.
118 void cit_panic_backtrace(int SigNum)
120 #ifdef HAVE_BACKTRACE
121 void *stack_frames[10];
125 printf("caught signal 11\n");
126 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
127 strings = backtrace_symbols(stack_frames, size);
128 for (i = 0; i < size; i++) {
130 CtdlLogPrintf(1, "%s\n", strings[i]);
132 CtdlLogPrintf(1, "%p\n", stack_frames[i]);
140 * Various things that need to be initialized at startup
142 void master_startup(void) {
146 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 create_room(config.c_baseroom, 0, "", 0, 1, 0, VIEW_BBS);
162 create_room(AIDEROOM, 3, "", 0, 1, 0, VIEW_BBS);
163 create_room(SYSCONFIGROOM, 3, "", 0, 1, 0, VIEW_BBS);
164 create_room(config.c_twitroom, 0, "", 0, 1, 0, VIEW_BBS);
166 /* The "Local System Configuration" room doesn't need to be visible */
167 if (lgetroom(&qrbuf, SYSCONFIGROOM) == 0) {
168 qrbuf.QRflags2 |= QR2_SYSTEM;
172 /* Aide needs to be public postable, else we're not RFC conformant. */
173 if (lgetroom(&qrbuf, AIDEROOM) == 0) {
174 qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
178 CtdlLogPrintf(CTDL_INFO, "Seeding the pseudo-random number generator...\n");
179 urandom = fopen("/dev/urandom", "r");
180 if (urandom != NULL) {
181 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 * Terminate a session.
256 void RemoveContext (struct CitContext *con)
259 CtdlLogPrintf(CTDL_ERR,
260 "WARNING: RemoveContext() called with NULL!\n");
263 CtdlLogPrintf(CTDL_DEBUG, "RemoveContext() session %d\n", con->cs_pid);
265 /* Run any cleanup routines registered by loadable modules.
266 * Note: We have to "become_session()" because the cleanup functions
267 * might make references to "CC" assuming it's the right one.
271 PerformSessionHooks(EVT_STOP);
272 become_session(NULL);
274 CtdlLogPrintf(CTDL_NOTICE, "[%3d] Session ended.\n", con->cs_pid);
276 /* If the client is still connected, blow 'em away. */
277 CtdlLogPrintf(CTDL_DEBUG, "Closing socket %d\n", con->client_socket);
278 close(con->client_socket);
280 /* If using AUTHMODE_LDAP, free the DN */
286 CtdlLogPrintf(CTDL_DEBUG, "Done with RemoveContext()\n");
294 * cmd_info() - tell the client about this server
296 void cmd_info(char *cmdbuf) {
297 cprintf("%d Server info:\n", LISTING_FOLLOWS);
298 cprintf("%d\n", CC->cs_pid);
299 cprintf("%s\n", config.c_nodename);
300 cprintf("%s\n", config.c_humannode);
301 cprintf("%s\n", config.c_fqdn);
302 cprintf("%s\n", CITADEL);
303 cprintf("%d\n", REV_LEVEL);
304 cprintf("%s\n", config.c_site_location);
305 cprintf("%s\n", config.c_sysadm);
306 cprintf("%d\n", SERVER_TYPE);
307 cprintf("%s\n", config.c_moreprompt);
308 cprintf("1\n"); /* 1 = yes, this system supports floors */
309 cprintf("1\n"); /* 1 = we support the extended paging options */
310 cprintf("%s\n", CC->cs_nonce);
311 cprintf("1\n"); /* 1 = yes, this system supports the QNOP command */
314 cprintf("1\n"); /* 1 = yes, this server is LDAP-enabled */
316 cprintf("0\n"); /* 1 = no, this server is not LDAP-enabled */
319 if (config.c_auth_mode == AUTHMODE_NATIVE) {
320 cprintf("%d\n", config.c_disable_newu);
323 cprintf("1\n"); /* "create new user" does not work with non-native auth modes */
326 cprintf("%s\n", config.c_default_cal_zone);
328 /* Output load averages */
329 cprintf("%f\n", CtdlThreadLoadAvg);
330 cprintf("%f\n", CtdlThreadWorkerAvg);
331 cprintf("%d\n", CtdlThreadGetCount());
333 cprintf("1\n"); /* yes, Sieve mail filtering is supported */
334 cprintf("%d\n", config.c_enable_fulltext);
335 cprintf("%s\n", svn_revision());
337 if (config.c_auth_mode == AUTHMODE_NATIVE) {
338 cprintf("1\n"); /* OpenID is enabled when using native auth */
341 cprintf("0\n"); /* OpenID is disabled when using non-native auth */
349 * returns an asterisk if there are any instant messages waiting,
352 char CtdlCheckExpress(void) {
353 if (CC->FirstExpressMessage == NULL) {
361 void cmd_time(char *argbuf)
367 localtime_r(&tv, &tmp);
369 /* timezone and daylight global variables are not portable. */
370 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
371 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, tmp.tm_gmtoff, tmp.tm_isdst);
373 cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, timezone, tmp.tm_isdst);
379 * Check originating host against the public_clients file. This determines
380 * whether the client is allowed to change the hostname for this session
381 * (for example, to show the location of the user rather than the location
384 int is_public_client(void)
390 char *public_clientspos;
391 char *public_clientsend;
394 static time_t pc_timestamp = 0;
395 static char public_clients[SIZ];
396 static char public_clients_file[SIZ];
398 #define LOCALHOSTSTR "127.0.0.1"
400 snprintf(public_clients_file,
401 sizeof public_clients_file,
406 * Check the time stamp on the public_clients file. If it's been
407 * updated since the last time we were here (or if this is the first
408 * time we've been through the loop), read its contents and learn
409 * the IP addresses of the listed hosts.
411 if (stat(public_clients_file, &statbuf) != 0) {
412 /* No public_clients file exists, so bail out */
413 CtdlLogPrintf(CTDL_WARNING, "Warning: '%s' does not exist\n",
414 public_clients_file);
418 if (statbuf.st_mtime > pc_timestamp) {
419 begin_critical_section(S_PUBLIC_CLIENTS);
420 CtdlLogPrintf(CTDL_INFO, "Loading %s\n", public_clients_file);
422 public_clientspos = &public_clients[0];
423 public_clientsend = public_clientspos + SIZ;
424 safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
425 public_clientspos += sizeof(LOCALHOSTSTR) - 1;
427 if (hostname_to_dotted_quad(addrbuf, config.c_fqdn) == 0) {
428 *(public_clientspos++) = '|';
430 while (!IsEmptyStr (paddr) &&
431 (public_clientspos < public_clientsend))
432 *(public_clientspos++) = *(paddr++);
435 fp = fopen(public_clients_file, "r");
437 while ((fgets(buf, sizeof buf, fp)!=NULL) &&
438 (public_clientspos < public_clientsend)){
441 while (!IsEmptyStr(ptr)) {
449 while (ptr>buf && isspace(*ptr)) {
452 if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
453 *(public_clientspos++) = '|';
455 while (!IsEmptyStr(paddr) &&
456 (public_clientspos < public_clientsend)){
457 *(public_clientspos++) = *(paddr++);
462 pc_timestamp = time(NULL);
463 end_critical_section(S_PUBLIC_CLIENTS);
466 CtdlLogPrintf(CTDL_DEBUG, "Checking whether %s is a local or public client\n",
468 for (i=0; i<num_parms(public_clients); ++i) {
469 extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
470 if (!strcasecmp(CC->cs_addr, addrbuf)) {
471 CtdlLogPrintf(CTDL_DEBUG, "... yes it is.\n");
476 /* No hits. This is not a public client. */
477 CtdlLogPrintf(CTDL_DEBUG, "... no it isn't.\n");
483 * the client is identifying itself to the server
485 void cmd_iden(char *argbuf)
495 if (num_parms(argbuf)<4) {
496 cprintf("%d usage error\n", ERROR + ILLEGAL_VALUE);
500 dev_code = extract_int(argbuf,0);
501 cli_code = extract_int(argbuf,1);
502 rev_level = extract_int(argbuf,2);
503 extract_token(desc, argbuf, 3, '|', sizeof desc);
505 safestrncpy(from_host, config.c_fqdn, sizeof from_host);
506 from_host[sizeof from_host - 1] = 0;
507 if (num_parms(argbuf)>=5) extract_token(from_host, argbuf, 4, '|', sizeof from_host);
509 CC->cs_clientdev = dev_code;
510 CC->cs_clienttyp = cli_code;
511 CC->cs_clientver = rev_level;
512 safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
513 CC->cs_clientname[31] = 0;
515 if (!IsEmptyStr(from_host)) {
516 if (CC->is_local_socket) do_lookup = 1;
517 else if (is_public_client()) do_lookup = 1;
521 CtdlLogPrintf(CTDL_DEBUG, "Looking up hostname '%s'\n", from_host);
522 if ((addr.s_addr = inet_addr(from_host)) != -1) {
523 locate_host(CC->cs_host, sizeof CC->cs_host,
524 CC->cs_addr, sizeof CC->cs_addr,
528 safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
529 CC->cs_host[sizeof CC->cs_host - 1] = 0;
533 CtdlLogPrintf(CTDL_NOTICE, "Client %d/%d/%01d.%02d (%s) from %s\n",
540 cprintf("%d Ok\n",CIT_OK);
545 * display system messages or help
547 void cmd_mesg(char *mname)
557 extract_token(buf, mname, 0, '|', sizeof buf);
559 dirs[0] = strdup(ctdl_message_dir);
560 dirs[1] = strdup(ctdl_hlp_dir);
562 snprintf(buf2, sizeof buf2, "%s.%d.%d",
563 buf, CC->cs_clientdev, CC->cs_clienttyp);
565 /* If the client requested "?" then produce a listing */
566 if (!strcmp(buf, "?")) {
567 cprintf("%d %s\n", LISTING_FOLLOWS, buf);
568 dp = opendir(dirs[1]);
570 while (d = readdir(dp), d != NULL) {
571 if (d->d_name[0] != '.') {
572 cprintf(" %s\n", d->d_name);
583 /* Otherwise, look for the requested file by name. */
585 mesg_locate(targ, sizeof targ, buf2, 2, (const char **)dirs);
586 if (IsEmptyStr(targ)) {
587 snprintf(buf2, sizeof buf2, "%s.%d",
588 buf, CC->cs_clientdev);
589 mesg_locate(targ, sizeof targ, buf2, 2,
590 (const char **)dirs);
591 if (IsEmptyStr(targ)) {
592 mesg_locate(targ, sizeof targ, buf, 2,
593 (const char **)dirs);
601 if (IsEmptyStr(targ)) {
602 cprintf("%d '%s' not found. (Searching in %s and %s)\n",
603 ERROR + FILE_NOT_FOUND,
611 mfp = fopen(targ, "r");
613 cprintf("%d Cannot open '%s': %s\n",
614 ERROR + INTERNAL_ERROR, targ, strerror(errno));
617 cprintf("%d %s\n", LISTING_FOLLOWS,buf);
619 while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
620 buf[strlen(buf)-1] = 0;
631 * enter system messages or help
633 void cmd_emsg(char *mname)
643 if (CtdlAccessCheck(ac_aide)) return;
645 extract_token(buf, mname, 0, '|', sizeof buf);
646 for (a=0; !IsEmptyStr(&buf[a]); ++a) { /* security measure */
647 if (buf[a] == '/') buf[a] = '.';
650 dirs[0] = strdup(ctdl_message_dir);
651 dirs[1] = strdup(ctdl_hlp_dir);
653 mesg_locate(targ, sizeof targ, buf, 2, (const char**)dirs);
657 if (IsEmptyStr(targ)) {
658 snprintf(targ, sizeof targ,
663 mfp = fopen(targ,"w");
665 cprintf("%d Cannot open '%s': %s\n",
666 ERROR + INTERNAL_ERROR, targ, strerror(errno));
669 cprintf("%d %s\n", SEND_LISTING, targ);
671 while (client_getln(buf, sizeof buf) >=0 && strcmp(buf, "000")) {
672 fprintf(mfp, "%s\n", buf);
679 /* Don't show the names of private rooms unless the viewing
680 * user also knows the rooms.
682 void GenerateRoomDisplay(char *real_room,
683 struct CitContext *viewed,
684 struct CitContext *viewer) {
688 strcpy(real_room, viewed->room.QRname);
689 if (viewed->room.QRflags & QR_MAILBOX) {
690 strcpy(real_room, &real_room[11]);
692 if (viewed->room.QRflags & QR_PRIVATE) {
693 CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
694 if ( (ra & UA_KNOWN) == 0) {
695 strcpy(real_room, "<private room>");
699 if (viewed->cs_flags & CS_CHAT) {
700 while (strlen(real_room) < 14) {
701 strcat(real_room, " ");
703 strcpy(&real_room[14], "<chat>");
709 * Convenience function.
711 int CtdlAccessCheck(int required_level) {
713 if (CC->internal_pgm) return(0);
714 if (required_level >= ac_internal) {
715 cprintf("%d This is not a user-level command.\n",
716 ERROR + HIGHER_ACCESS_REQUIRED);
720 if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
721 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
725 if (CC->user.axlevel >= 6) return(0);
726 if (required_level >= ac_aide) {
727 cprintf("%d This command requires Aide access.\n",
728 ERROR + HIGHER_ACCESS_REQUIRED);
732 if (is_room_aide()) return(0);
733 if (required_level >= ac_room_aide) {
734 cprintf("%d This command requires Aide or Room Aide access.\n",
735 ERROR + HIGHER_ACCESS_REQUIRED);
739 /* shhh ... succeed quietly */
746 * Terminate another running session
748 void cmd_term(char *cmdbuf)
751 struct CitContext *ccptr;
755 session_num = extract_int(cmdbuf, 0);
756 if (session_num == CC->cs_pid) {
757 cprintf("%d You can't kill your own session.\n", ERROR + ILLEGAL_VALUE);
761 CtdlLogPrintf(CTDL_DEBUG, "Locating session to kill\n");
762 begin_critical_section(S_SESSION_TABLE);
763 for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
764 if (session_num == ccptr->cs_pid) {
766 if ((ccptr->user.usernum == CC->user.usernum)
767 || (CC->user.axlevel >= 6)) {
776 end_critical_section(S_SESSION_TABLE);
780 cprintf("%d Session terminated.\n", CIT_OK);
783 cprintf("%d You are not allowed to do that.\n",
784 ERROR + HIGHER_ACCESS_REQUIRED);
788 cprintf("%d No such session.\n", ERROR + ILLEGAL_VALUE);
797 * get the paginator prompt
799 void cmd_more(char *argbuf) {
800 cprintf("%d %s\n", CIT_OK, config.c_moreprompt);
806 void cmd_echo(char *etext)
808 cprintf("%d %s\n", CIT_OK, etext);
814 * identify as internal program
816 void cmd_ipgm(char *argbuf)
820 secret = extract_int(argbuf, 0);
822 /* For security reasons, we do NOT allow this command to run
823 * over the network. Local sockets only.
825 if (!CC->is_local_socket) {
827 cprintf("%d Authentication failed.\n",
828 ERROR + PASSWORD_REQUIRED);
830 else if (secret == config.c_ipgm_secret) {
831 CC->internal_pgm = 1;
832 strcpy(CC->curr_user, "<internal program>");
833 CC->cs_flags = CC->cs_flags|CS_STEALTH;
834 cprintf("%d Authenticated as an internal program.\n", CIT_OK);
838 cprintf("%d Authentication failed.\n",
839 ERROR + PASSWORD_REQUIRED);
840 CtdlLogPrintf(CTDL_ERR, "Warning: ipgm authentication failed.\n");
847 * Shut down the server
849 void cmd_down(char *argbuf) {
850 char *Reply ="%d Shutting down server. Goodbye.\n";
852 if (CtdlAccessCheck(ac_aide)) return;
854 if (!IsEmptyStr(argbuf))
857 restart_server = extract_int(argbuf, 0);
859 if (restart_server > 0)
861 Reply = "%d citserver will now shut down and automatically restart.\n";
863 if ((restart_server > 0) && !running_as_daemon)
865 CtdlLogPrintf(CTDL_ERR, "The user requested restart, but not running as daemon! Geronimooooooo!\n");
866 Reply = "%d Warning: citserver is not running in daemon mode and is therefore unlikely to restart automatically.\n";
869 cprintf(Reply, state);
873 cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN);
879 * Halt the server without exiting the server process.
881 void cmd_halt(char *argbuf) {
883 if (CtdlAccessCheck(ac_aide)) return;
885 cprintf("%d Halting server. Goodbye.\n", CIT_OK);
887 shutdown_and_halt = 1;
891 * Schedule or cancel a server shutdown
893 void cmd_scdn(char *argbuf)
897 char *Reply = "%d %d\n";
899 if (CtdlAccessCheck(ac_aide)) return;
901 new_state = extract_int(argbuf, 0);
902 if ((new_state == 2) || (new_state == 3))
905 if (!running_as_daemon)
907 CtdlLogPrintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
908 Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
912 restart_server = extract_int(argbuf, 0);
915 if ((new_state == 0) || (new_state == 1)) {
916 ScheduledShutdown = new_state;
918 cprintf(Reply, state, ScheduledShutdown);
923 * Set or unset asynchronous protocol mode
925 void cmd_asyn(char *argbuf)
929 new_state = extract_int(argbuf, 0);
930 if ((new_state == 0) || (new_state == 1)) {
931 CC->is_async = new_state;
933 cprintf("%d %d\n", CIT_OK, CC->is_async);
938 * Generate a "nonce" for APOP-style authentication.
940 * RFC 1725 et al specify a PID to be placed in front of the nonce.
941 * Quoth BTX: That would be stupid.
943 void generate_nonce(struct CitContext *con) {
946 memset(con->cs_nonce, NONCE_SIZE, 0);
947 gettimeofday(&tv, NULL);
948 memset(con->cs_nonce, NONCE_SIZE, 0);
949 snprintf(con->cs_nonce, NONCE_SIZE, "<%d%ld@%s>",
950 rand(), (long)tv.tv_usec, config.c_fqdn);
957 * Back-end function for starting a session
959 void begin_session(struct CitContext *con)
962 struct sockaddr_in sin;
965 * Initialize some variables specific to our context.
968 con->internal_pgm = 0;
969 con->download_fp = NULL;
970 con->upload_fp = NULL;
971 con->FirstExpressMessage = NULL;
973 time(&con->lastidle);
974 strcpy(con->lastcmdname, " ");
975 strcpy(con->cs_clientname, "(unknown)");
976 strcpy(con->curr_user, NLI);
977 *con->net_node = '\0';
978 *con->fake_username = '\0';
979 *con->fake_hostname = '\0';
980 *con->fake_roomname = '\0';
982 safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
983 safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
984 con->cs_UDSclientUID = -1;
985 con->cs_host[sizeof con->cs_host - 1] = 0;
987 if (!CC->is_local_socket) {
988 if (!getpeername(con->client_socket, (struct sockaddr *) &sin, &len)) {
989 locate_host(con->cs_host, sizeof con->cs_host,
990 con->cs_addr, sizeof con->cs_addr,
996 strcpy(con->cs_host, "");
997 #ifdef HAVE_STRUCT_UCRED
999 /* as http://www.wsinnovations.com/softeng/articles/uds.html told us... */
1000 struct ucred credentials;
1001 int ucred_length = sizeof(struct ucred);
1003 /*fill in the user data structure */
1004 if(getsockopt(con->client_socket, SOL_SOCKET, SO_PEERCRED, &credentials, &ucred_length)) {
1005 CtdlLogPrintf(CTDL_NOTICE, "could obtain credentials from unix domain socket");
1009 /* the process ID of the process on the other side of the socket */
1010 /* credentials.pid; */
1012 /* the effective UID of the process on the other side of the socket */
1013 con->cs_UDSclientUID = credentials.uid;
1015 /* the effective primary GID of the process on the other side of the socket */
1016 /* credentials.gid; */
1018 /* To get supplemental groups, we will have to look them up in our account
1019 database, after a reverse lookup on the UID to get the account name.
1020 We can take this opportunity to check to see if this is a legit account.
1027 con->upload_type = UPL_FILE;
1031 if (((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) || CtdlWantSingleUser()) {
1035 if (!CC->is_local_socket) {
1036 CtdlLogPrintf(CTDL_NOTICE, "Session started from %s [%s].\n", con->cs_host, con->cs_addr);
1039 CtdlLogPrintf(CTDL_NOTICE, "Session started via local socket.\n");
1042 /* Run any session startup routines registered by loadable modules */
1043 PerformSessionHooks(EVT_START);
1047 void citproto_begin_session() {
1048 if (CC->nologin==1) {
1049 cprintf("%d %s: Too many users are already online (maximum is %d)\n",
1050 ERROR + MAX_SESSIONS_EXCEEDED,
1051 config.c_nodename, config.c_maxsessions
1056 cprintf("%d %s Citadel server ready.\n", CIT_OK, config.c_nodename);
1057 CC->can_receive_im = 1;
1063 void cmd_noop(char *argbuf)
1065 cprintf("%d%cok\n", CIT_OK, CtdlCheckExpress() );
1068 void cmd_qnop(char *argbuf)
1070 /* do nothing, this command returns no response */
1073 void cmd_quit(char *argbuf)
1075 cprintf("%d Goodbye.\n", CIT_OK);
1079 void cmd_lout(char *argbuf)
1083 cprintf("%d logged out.\n", CIT_OK);
1087 * This loop recognizes all server commands.
1089 void do_command_loop(void) {
1091 const char *old_name = NULL;
1093 old_name = CtdlThreadName("do_command_loop");
1096 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
1097 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
1098 CtdlLogPrintf(CTDL_ERR, "Client disconnected: ending session.\n");
1100 CtdlThreadName(old_name);
1104 /* Log the server command, but don't show passwords... */
1105 if ( (strncasecmp(cmdbuf, "PASS", 4))
1106 && (strncasecmp(cmdbuf, "SETP", 4)) ) {
1107 CtdlLogPrintf(CTDL_INFO, "%s\n", cmdbuf);
1110 CtdlLogPrintf(CTDL_INFO, "<password command sent>\n");
1116 * Let other clients see the last command we executed, and
1117 * update the idle time, but not NOOP, QNOP, PEXP, GEXP, RWHO, or TIME.
1119 if ( (strncasecmp(cmdbuf, "NOOP", 4))
1120 && (strncasecmp(cmdbuf, "QNOP", 4))
1121 && (strncasecmp(cmdbuf, "PEXP", 4))
1122 && (strncasecmp(cmdbuf, "GEXP", 4))
1123 && (strncasecmp(cmdbuf, "RWHO", 4))
1124 && (strncasecmp(cmdbuf, "TIME", 4)) ) {
1125 strcpy(CC->lastcmdname, " ");
1126 safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
1127 time(&CC->lastidle);
1130 CtdlThreadName(cmdbuf);
1132 if ((strncasecmp(cmdbuf, "ENT0", 4))
1133 && (strncasecmp(cmdbuf, "MESG", 4))
1134 && (strncasecmp(cmdbuf, "MSGS", 4)))
1136 CC->cs_flags &= ~CS_POSTING;
1139 if (!DLoader_Exec_Cmd(cmdbuf)) {
1140 cprintf("%d Unrecognized or unsupported command.\n", ERROR + CMD_NOT_SUPPORTED);
1145 /* Run any after-each-command routines registered by modules */
1146 PerformSessionHooks(EVT_CMD);
1147 CtdlThreadName(old_name);
1152 * This loop performs all asynchronous functions.
1154 void do_async_loop(void) {
1155 PerformSessionHooks(EVT_ASYNC);
1164 /*****************************************************************************/
1165 /* MODULE INITIALIZATION STUFF */
1166 /*****************************************************************************/
1168 CTDL_MODULE_INIT(citserver)
1170 CtdlRegisterProtoHook(cmd_noop, "NOOP", "Autoconverted. TODO: document me.");
1171 CtdlRegisterProtoHook(cmd_qnop, "QNOP", "Autoconverted. TODO: document me.");
1172 CtdlRegisterProtoHook(cmd_quit, "QUIT", "Autoconverted. TODO: document me.");
1173 CtdlRegisterProtoHook(cmd_lout, "LOUT", "Autoconverted. TODO: document me.");
1174 CtdlRegisterProtoHook(cmd_asyn, "ASYN", "Autoconverted. TODO: document me.");
1175 CtdlRegisterProtoHook(cmd_info, "INFO", "Autoconverted. TODO: document me.");
1176 CtdlRegisterProtoHook(cmd_mesg, "MESG", "Autoconverted. TODO: document me.");
1177 CtdlRegisterProtoHook(cmd_emsg, "EMSG", "Autoconverted. TODO: document me.");
1178 CtdlRegisterProtoHook(cmd_echo, "ECHO", "Autoconverted. TODO: document me.");
1179 CtdlRegisterProtoHook(cmd_more, "MORE", "Autoconverted. TODO: document me.");
1180 CtdlRegisterProtoHook(cmd_iden, "IDEN", "Autoconverted. TODO: document me.");
1181 CtdlRegisterProtoHook(cmd_ipgm, "IPGM", "Autoconverted. TODO: document me.");
1182 CtdlRegisterProtoHook(cmd_term, "TERM", "Autoconverted. TODO: document me.");
1183 CtdlRegisterProtoHook(cmd_down, "DOWN", "Autoconverted. TODO: document me.");
1184 CtdlRegisterProtoHook(cmd_halt, "HALT", "Autoconverted. TODO: document me.");
1185 CtdlRegisterProtoHook(cmd_scdn, "SCDN", "Autoconverted. TODO: document me.");
1186 CtdlRegisterProtoHook(cmd_time, "TIME", "Autoconverted. TODO: document me.");
1187 /* return our Subversion id for the Log */