-/* $Id$ */
+/*
+ * $Id$
+ *
+ * Main source module for the Citadel server
+ *
+ */
+
+#ifdef DLL_EXPORT
+#define IN_LIBCIT
+#endif
+
#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
-#include <time.h>
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <syslog.h>
-#include <dlfcn.h>
+/* #include <dlfcn.h> */
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include "citadel.h"
#include "server.h"
+#include "dynloader.h"
#include "sysdep_decls.h"
#include "citserver.h"
#include "config.h"
#include "locate_host.h"
#include "room_ops.h"
#include "file_ops.h"
-#include "dynloader.h"
#include "policy.h"
#include "control.h"
#include "tools.h"
* Various things that need to be initialized at startup
*/
void master_startup(void) {
+ struct timeval tv;
+
+ lprintf(9, "master_startup() started\n");
lprintf(7, "Opening databases\n");
open_databases();
- if (do_defrag)
+ if (do_defrag) {
defrag_databases();
+ }
- lprintf(7, "Checking floor reference counts\n");
check_ref_counts();
lprintf(7, "Creating base rooms (if necessary)\n");
- create_room(BASEROOM, 0, "", 0);
- create_room(AIDEROOM, 3, "", 0);
- create_room(SYSCONFIGROOM, 3, "", 0);
- create_room(config.c_twitroom, 0, "", 0);
- }
+ create_room(BASEROOM, 0, "", 0, 1);
+ create_room(AIDEROOM, 3, "", 0, 1);
+ create_room(SYSCONFIGROOM, 3, "", 0, 1);
+ create_room(config.c_twitroom, 0, "", 0, 1);
+
+ lprintf(7, "Seeding the pseudo-random number generator...\n");
+ gettimeofday(&tv, NULL);
+ srand(tv.tv_usec);
+ lprintf(9, "master_startup() finished\n");
+}
+
+
/*
* Cleanup routine to be called when the server is shutting down.
+ * WARNING: It's no longer safe to call this function to force a shutdown.
+ * Instead, set time_to_die = 1.
*/
void master_cleanup(void) {
struct CleanupFunctionHook *fcn;
- /* Cancel all running sessions */
- lprintf(7, "Cancelling running sessions...\n");
-
-/* FIX do something here
- while (ContextList != NULL) {
- }
- */
-
/* Run any cleanup routines registered by loadable modules */
for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
(*fcn->h_function_pointer)();
- }
+ }
/* Close databases */
lprintf(7, "Closing databases\n");
lprintf(3, "citserver: exiting.\n");
fflush(stdout); fflush(stderr);
exit(0);
- }
+}
/*
return;
}
+ /* Run any cleanup routines registered by loadable modules.
+ * Note 1: This must occur *before* deallocate_user_data() because the
+ * cleanup functions might touch dynamic session data.
+ * Note 2: We have to "become_session()" because the cleanup functions
+ * might make references to "CC" assuming it's the right one.
+ */
+ become_session(con);
+ PerformSessionHooks(EVT_STOP);
+ become_session(NULL);
+
/* Now handle all of the administrivia. */
lprintf(7, "Calling logout(%d)\n", con->cs_pid);
logout(con);
unlink(con->temp);
lprintf(3, "citserver[%3d]: ended.\n", con->cs_pid);
- /* Run any cleanup routines registered by loadable modules */
- PerformSessionHooks(EVT_STOP);
- syslog(LOG_NOTICE,"session %d ended", con->cs_pid);
+ syslog(LOG_NOTICE,"session %d: ended", con->cs_pid);
/* Deallocate any user-data attached to this session */
deallocate_user_data(con);
lprintf(7, "Closing socket %d\n", con->client_socket);
close(con->client_socket);
- /* Tell the housekeeping thread to check to see if this is the time
- * to initiate a scheduled shutdown event.
- */
- enter_housekeeping_cmd("SCHED_SHUTDOWN");
+ /* This is where we used to check for scheduled shutdowns. */
/* Free up the memory used by this context */
phree(con);
* cmd_info() - tell the client about this server
*/
void cmd_info(void) {
- cprintf("%d Server info:\n",LISTING_FOLLOWS);
- cprintf("%d\n",CC->cs_pid);
- cprintf("%s\n",config.c_nodename);
- cprintf("%s\n",config.c_humannode);
- cprintf("%s\n",config.c_fqdn);
- cprintf("%s\n",CITADEL);
- cprintf("%d\n",REV_LEVEL);
- cprintf("%s\n",config.c_bbs_city);
- cprintf("%s\n",config.c_sysadm);
- cprintf("%d\n",SERVER_TYPE);
- cprintf("%s\n",config.c_moreprompt);
+ cprintf("%d Server info:\n", LISTING_FOLLOWS);
+ cprintf("%d\n", CC->cs_pid);
+ cprintf("%s\n", config.c_nodename);
+ cprintf("%s\n", config.c_humannode);
+ cprintf("%s\n", config.c_fqdn);
+ cprintf("%s\n", CITADEL);
+ cprintf("%d\n", REV_LEVEL);
+ cprintf("%s\n", config.c_bbs_city);
+ cprintf("%s\n", config.c_sysadm);
+ cprintf("%d\n", SERVER_TYPE);
+ cprintf("%s\n", config.c_moreprompt);
cprintf("1\n"); /* 1 = yes, this system supports floors */
cprintf("1\n"); /* 1 = we support the extended paging options */
+ cprintf("%s\n", CC->cs_nonce);
cprintf("000\n");
- }
-
-void cmd_rchg(char *argbuf)
-{
- char newroomname[256];
-
- extract(newroomname, argbuf, 0);
- newroomname[ROOMNAMELEN-1] = 0;
- if (strlen(newroomname) > 0) {
- safestrncpy(CC->fake_roomname, newroomname,
- sizeof(CC->fake_roomname) );
- }
- else {
- strcpy(CC->fake_roomname, "");
- }
- cprintf("%d OK\n", OK);
-}
-
-void cmd_hchg(char *argbuf)
-{
- char newhostname[256];
-
- extract(newhostname, argbuf, 0);
- if (strlen(newhostname) > 0) {
- safestrncpy(CC->fake_hostname, newhostname,
- sizeof(CC->fake_hostname) );
- }
- else {
- strcpy(CC->fake_hostname, "");
- }
- cprintf("%d OK\n", OK);
}
-void cmd_uchg(char *argbuf)
-{
-
- char newusername[256];
-
- extract(newusername, argbuf, 0);
-
- if (CC->usersupp.axlevel < 6) {
- cprintf("%d You must be an Aide to masquerade your name.\n",
- ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
-
- if (strlen(newusername) > 0) {
- CC->cs_flags &= ~CS_STEALTH;
- memset(CC->fake_username, 0, 32);
- if (strncasecmp(newusername, CC->curr_user,
- strlen(CC->curr_user)))
- safestrncpy(CC->fake_username, newusername,
- sizeof(CC->fake_username));
- }
- else {
- CC->fake_username[0] = '\0';
- CC->cs_flags |= CS_STEALTH;
- }
- cprintf("%d\n",OK);
-}
-
-
/*
* returns an asterisk if there are any express messages waiting,
* space otherwise.
*/
-char check_express(void) {
+char CtdlCheckExpress(void) {
if (CC->FirstExpressMessage == NULL) {
return(' ');
}
*/
int is_public_client(char *where)
{
- char buf[256];
+ char buf[SIZ];
FILE *fp;
- if (hostnames_match(where,"localhost")) return(1);
- if (hostnames_match(where,config.c_fqdn)) return(1);
+ lprintf(9, "Checking whether %s is a public client\n", where);
+
+ if (hostnames_match(where, "localhost")) return(1);
+ if (hostnames_match(where, config.c_fqdn)) return(1);
fp = fopen("public_clients","r");
if (fp == NULL) return(0);
- while (fgets(buf,256,fp)!=NULL) {
+ while (fgets(buf, sizeof buf, fp)!=NULL) {
while (isspace((buf[strlen(buf)-1])))
buf[strlen(buf)-1] = 0;
if (hostnames_match(where,buf)) {
int dev_code;
int cli_code;
int rev_level;
- char desc[256];
- char from_host[256];
+ char desc[SIZ];
+ char from_host[SIZ];
struct in_addr addr;
+ int do_lookup = 0;
if (num_parms(argbuf)<4) {
cprintf("%d usage error\n",ERROR);
return;
- }
+ }
dev_code = extract_int(argbuf,0);
cli_code = extract_int(argbuf,1);
safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
CC->cs_clientname[31] = 0;
- lprintf(9, "Looking up hostname '%s'\n", from_host);
- if ((strlen(from_host)>0) &&
- (is_public_client(CC->cs_host))) {
- if ((addr.s_addr = inet_addr(from_host)) != INADDR_NONE)
+ if (strlen(from_host) > 0) {
+ if (CC->is_local_socket) do_lookup = 1;
+ else if (is_public_client(CC->cs_host)) do_lookup = 1;
+ }
+
+ if (do_lookup) {
+ lprintf(9, "Looking up hostname '%s'\n", from_host);
+ if ((addr.s_addr = inet_addr(from_host)) != -1) {
locate_host(CC->cs_host, &addr);
+ }
else {
safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
CC->cs_host[24] = 0;
- }
}
+ }
- syslog(LOG_NOTICE,"client %d/%d/%01d.%02d (%s)\n",
+ lprintf(7, "client %d/%d/%01d.%02d (%s)\n",
dev_code,
cli_code,
(rev_level / 100),
(rev_level % 100),
desc);
- cprintf("%d Ok\n",OK);
- }
-
-
-/*
- * enter or exit "stealth mode"
- */
-void cmd_stel(char *cmdbuf)
-{
- int requested_mode;
-
- requested_mode = extract_int(cmdbuf,0);
- if (requested_mode !=0) requested_mode = 1;
-
- if (!CC->logged_in) {
- cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
- return;
- }
-
- if (CC->usersupp.axlevel < 6) {
- cprintf("%d You must be an Aide to use stealth mode.\n",
- ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
-
- if (CC->cs_flags & CS_STEALTH) {
- if (requested_mode == 0)
- CC->cs_flags = CC->cs_flags-CS_STEALTH;
- }
- else {
- if (requested_mode == 1)
- CC->cs_flags = CC->cs_flags|CS_STEALTH;
- }
+ syslog(LOG_NOTICE,"session %d: client %d/%d/%01d.%02d (%s) from %s\n",
+ CC->cs_pid,
+ dev_code,
+ cli_code,
+ (rev_level / 100),
+ (rev_level % 100),
+ desc,
+ CC->cs_host);
cprintf("%d Ok\n",OK);
- }
-
-
+}
/*
void cmd_mesg(char *mname)
{
FILE *mfp;
- char targ[256];
- char buf[256];
+ char targ[SIZ];
+ char buf[SIZ];
char *dirs[2];
extract(buf,mname,0);
}
cprintf("%d %s\n",LISTING_FOLLOWS,buf);
- while (fgets(buf,255,mfp)!=NULL) {
+ while (fgets(buf, (SIZ-1), mfp)!=NULL) {
buf[strlen(buf)-1] = 0;
do_help_subst(buf);
cprintf("%s\n",buf);
void cmd_emsg(char *mname)
{
FILE *mfp;
- char targ[256];
- char buf[256];
+ char targ[SIZ];
+ char buf[SIZ];
char *dirs[2];
int a;
- if (CC->usersupp.axlevel < 6) {
- cprintf("%d You must be an Aide to edit system messages.\n",
- ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
+ if (CtdlAccessCheck(ac_aide)) return;
extract(buf,mname,0);
for (a=0; a<strlen(buf); ++a) { /* security measure */
}
-
/*
- * who's online
+ * Convenience function.
*/
-void cmd_rwho(void) {
- struct CitContext *cptr;
- int spoofed = 0;
- int aide;
- char un[40];
- char real_room[ROOMNAMELEN], room[ROOMNAMELEN];
- char host[40], flags[5];
-
- aide = CC->usersupp.axlevel >= 6;
- cprintf("%d%c \n", LISTING_FOLLOWS, check_express() );
-
- for (cptr = ContextList; cptr != NULL; cptr = cptr->next)
- {
- flags[0] = '\0';
- spoofed = 0;
-
- if (cptr->cs_flags & CS_POSTING)
- strcat(flags, "*");
- else
- strcat(flags, ".");
-
- if (cptr->fake_username[0])
- {
- strcpy(un, cptr->fake_username);
- spoofed = 1;
- }
- else
- strcpy(un, cptr->curr_user);
-
- if (cptr->fake_hostname[0])
- {
- strcpy(host, cptr->fake_hostname);
- spoofed = 1;
- }
- else
- strcpy(host, cptr->cs_host);
+int CtdlAccessCheck(int required_level) {
- GenerateRoomDisplay(real_room, cptr, CC);
+ if (CC->internal_pgm) return(0);
+ if (required_level >= ac_internal) {
+ cprintf("%d This is not a user-level command.\n",
+ ERROR+HIGHER_ACCESS_REQUIRED);
+ return(-1);
+ }
- if (cptr->fake_roomname[0]) {
- strcpy(room, cptr->fake_roomname);
- spoofed = 1;
- }
- else {
- strcpy(room, real_room);
- }
-
- if ((aide) && (spoofed))
- strcat(flags, "+");
-
- if ((cptr->cs_flags & CS_STEALTH) && (aide))
- strcat(flags, "-");
-
- if (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
- {
- cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
- cptr->cs_pid, un, room,
- host, cptr->cs_clientname,
- (long)(cptr->lastidle),
- cptr->lastcmdname, flags);
- }
- if ((spoofed) && (aide))
- {
- cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
- cptr->cs_pid, cptr->curr_user,
- real_room,
- cptr->cs_host, cptr->cs_clientname,
- (long)(cptr->lastidle),
- cptr->lastcmdname, flags);
-
- }
+ if (CC->usersupp.axlevel >= 6) return(0);
+ if (required_level >= ac_aide) {
+ cprintf("%d This command requires Aide access.\n",
+ ERROR+HIGHER_ACCESS_REQUIRED);
+ return(-1);
}
- /* Now it's magic time. Before we finish, call any EVT_RWHO hooks
- * so that external paging modules such as serv_icq can add more
- * content to the Wholist.
- */
- PerformSessionHooks(EVT_RWHO);
- cprintf("000\n");
+ if (is_room_aide()) return(0);
+ if (required_level >= ac_room_aide) {
+ cprintf("%d This command requires Aide or Room Aide access.\n",
+ ERROR + HIGHER_ACCESS_REQUIRED);
+ return(-1);
+ }
+
+ if (CC->logged_in) return(0);
+ if (required_level >= ac_logged_in) {
+ cprintf("%d Not logged in.\n", ERROR+NOT_LOGGED_IN);
+ return(-1);
}
+ /* shhh ... succeed quietly */
+ return(0);
+}
+
+
/*
* Terminate another running session
struct CitContext *ccptr;
int found_it = 0;
- if (!CC->logged_in) {
- cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
- return;
- }
-
- if (CC->usersupp.axlevel < 6) {
- cprintf("%d You must be an Aide to terminate sessions.\n",
- ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
+ if (CtdlAccessCheck(ac_aide)) return;
session_num = extract_int(cmdbuf, 0);
if (session_num == CC->cs_pid) {
* Shut down the server
*/
void cmd_down(void) {
- if (!CC->logged_in) {
- cprintf("%d Not logged in.\n", ERROR+NOT_LOGGED_IN);
- return;
- }
- if (CC->usersupp.axlevel < 6) {
- cprintf("%d You must be an Aide to shut down the server.\n",
- ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
+ if (CtdlAccessCheck(ac_aide)) return;
cprintf("%d Shutting down server. Goodbye.\n", OK);
- master_cleanup();
+ time_to_die = 1;
}
/*
{
int new_state;
- if (!CC->logged_in) {
- cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
- return;
- }
-
- if (CC->usersupp.axlevel < 6) {
- cprintf("%d You must be an Aide to schedule a shutdown.\n",
- ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
+ if (CtdlAccessCheck(ac_aide)) return;
new_state = extract_int(argbuf, 0);
if ((new_state == 0) || (new_state == 1)) {
ScheduledShutdown = new_state;
}
cprintf("%d %d\n", OK, ScheduledShutdown);
+}
+
+
+/*
+ * Set or unset asynchronous protocol mode
+ */
+void cmd_asyn(char *argbuf)
+{
+ int new_state;
+
+ new_state = extract_int(argbuf, 0);
+ if ((new_state == 0) || (new_state == 1)) {
+ CC->is_async = new_state;
}
+ cprintf("%d %d\n", OK, CC->is_async);
+}
+
+
+/*
+ * Generate a "nonce" for APOP-style authentication.
+ *
+ * RFC 1725 et al specify a PID to be placed in front of the nonce.
+ * Quoth BTX: That would be stupid.
+ */
+void generate_nonce(struct CitContext *con) {
+ struct timeval tv;
+
+ memset(con->cs_nonce, NONCE_SIZE, 0);
+ gettimeofday(&tv, NULL);
+ memset(con->cs_nonce, NONCE_SIZE, 0);
+ snprintf(con->cs_nonce, NONCE_SIZE, "<%d%ld@%s>",
+ rand(), tv.tv_usec, config.c_fqdn);
+}
+
+
/*
strcpy(con->cs_clientname, "(unknown)");
strcpy(con->curr_user, NLI);
strcpy(con->net_node,"");
+ strcpy(con->fake_username, "");
+ strcpy(con->fake_postname, "");
+ strcpy(con->fake_hostname, "");
+ strcpy(con->fake_roomname, "");
+ generate_nonce(con);
snprintf(con->temp, sizeof con->temp, tmpnam(NULL));
safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
con->cs_host[sizeof con->cs_host - 1] = 0;
len = sizeof sin;
- if (!getpeername(con->client_socket, (struct sockaddr *) &sin, &len))
- locate_host(con->cs_host, &sin.sin_addr);
+ if (!CC->is_local_socket) {
+ if (!getpeername(con->client_socket,
+ (struct sockaddr *) &sin, &len))
+ locate_host(con->cs_host, &sin.sin_addr);
+ }
+ else {
+ strcpy(con->cs_host, "");
+ }
con->cs_flags = 0;
con->upload_type = UPL_FILE;
con->dl_is_net = 0;
* This loop recognizes all server commands.
*/
void do_command_loop(void) {
- char cmdbuf[256];
+ char cmdbuf[SIZ];
time(&CC->lastcmd);
memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
}
if (!strncasecmp(cmdbuf,"NOOP",4)) {
- cprintf("%d%cok\n",OK,check_express());
+ cprintf("%d%cok\n",OK,CtdlCheckExpress());
}
else if (!strncasecmp(cmdbuf,"QUIT",4)) {
CC->kill_me = 1;
}
+ else if (!strncasecmp(cmdbuf,"ASYN",4)) {
+ cmd_asyn(&cmdbuf[5]);
+ }
+
else if (!strncasecmp(cmdbuf,"LOUT",4)) {
if (CC->logged_in) logout(CC);
cprintf("%d logged out.\n",OK);
cmd_netf(&cmdbuf[5]);
}
- else if (!strncasecmp(cmdbuf,"RWHO",4)) {
- cmd_rwho();
- }
-
else if (!strncasecmp(cmdbuf,"OPEN",4)) {
cmd_open(&cmdbuf[5]);
}
cmd_ipgm(&cmdbuf[5]);
}
- else if (!strncasecmp(cmdbuf,"EBIO",4)) {
- cmd_ebio();
- }
-
- else if (!strncasecmp(cmdbuf,"RBIO",4)) {
- cmd_rbio(&cmdbuf[5]);
- }
-
- else if (!strncasecmp(cmdbuf,"LBIO",4)) {
- cmd_lbio();
- }
-
- else if (!strncasecmp(cmdbuf,"STEL",4)) {
- cmd_stel(&cmdbuf[5]);
- }
-
else if (!strncasecmp(cmdbuf,"TERM",4)) {
cmd_term(&cmdbuf[5]);
}
cmd_uimg(&cmdbuf[5]);
}
- else if (!strncasecmp(cmdbuf, "UCHG", 4)) {
- cmd_uchg(&cmdbuf[5]);
- }
-
else if (!strncasecmp(cmdbuf, "TIME", 4)) {
cmd_time();
}
- else if (!strncasecmp(cmdbuf, "HCHG", 4)) {
- cmd_hchg(&cmdbuf[5]);
- }
-
- else if (!strncasecmp(cmdbuf, "RCHG", 4)) {
- cmd_rchg(&cmdbuf[5]);
- }
-
else if (!strncasecmp(cmdbuf, "AGUP", 4)) {
cmd_agup(&cmdbuf[5]);
}
cmd_conf(&cmdbuf[5]);
}
+ else if (!strncasecmp(cmdbuf, "SEEN", 4)) {
+ cmd_seen(&cmdbuf[5]);
+ }
+
#ifdef DEBUG_MEMORY_LEAKS
else if (!strncasecmp(cmdbuf, "LEAK", 4)) {
dump_tracked();