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citadel  8.12
Defines | Typedefs | Functions | Variables
citserver.c File Reference
#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <ctype.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <limits.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <libcitadel.h>
#include "citadel.h"
#include "server.h"
#include "sysdep_decls.h"
#include "threads.h"
#include "citserver.h"
#include "config.h"
#include "database.h"
#include "housekeeping.h"
#include "user_ops.h"
#include "msgbase.h"
#include "support.h"
#include "locate_host.h"
#include "room_ops.h"
#include "file_ops.h"
#include "control.h"
#include "euidindex.h"
#include "context.h"
#include "svn_revision.h"
#include "snprintf.h"
#include "ctdl_module.h"

Go to the source code of this file.

Defines

#define LOCALHOSTSTR   "127.0.0.1"

Typedefs

typedef const char * ccharp

Functions

void cit_backtrace (void)
void cit_oneline_backtrace (void)
void cit_panic_backtrace (int SigNum)
void master_startup (void)
void master_cleanup (int exitcode)
void cmd_info (char *cmdbuf)
char CtdlCheckExpress (void)
void cmd_time (char *argbuf)
int is_public_client (void)
void cmd_iden (char *argbuf)
void cmd_mesg (char *mname)
void cmd_emsg (char *mname)
void GenerateRoomDisplay (char *real_room, CitContext *viewed, CitContext *viewer)
int CtdlAccessCheck (int required_level)
void cmd_term (char *cmdbuf)
void cmd_more (char *argbuf)
void cmd_echo (char *etext)
void cmd_down (char *argbuf)
void cmd_halt (char *argbuf)
void cmd_scdn (char *argbuf)
void cmd_asyn (char *argbuf)
void begin_session (CitContext *con)
void citproto_begin_session ()
void citproto_begin_admin_session ()
void cmd_noop (char *argbuf)
void cmd_qnop (char *argbuf)
void cmd_quit (char *argbuf)
void cmd_lout (char *argbuf)
void do_command_loop (void)
void do_async_loop (void)
 CTDL_MODULE_INIT (citserver)

Variables

char * unique_session_numbers
int ScheduledShutdown = 0
time_t server_startup_time
int panic_fd
int openid_level_supported = 0

Define Documentation

#define LOCALHOSTSTR   "127.0.0.1"

Typedef Documentation

typedef const char* ccharp

Definition at line 504 of file citserver.c.


Function Documentation

void begin_session ( CitContext con)

Definition at line 859 of file citserver.c.

{
       /* 
        * Initialize some variables specific to our context.
        */
       con->logged_in = 0;
       con->internal_pgm = 0;
       con->download_fp = NULL;
       con->upload_fp = NULL;
       con->cached_msglist = NULL;
       con->cached_num_msgs = 0;
       con->FirstExpressMessage = NULL;
       time(&con->lastcmd);
       time(&con->lastidle);
       strcpy(con->lastcmdname, "    ");
       strcpy(con->cs_clientname, "(unknown)");
       strcpy(con->curr_user, NLI);
       *con->net_node = '\0';
       *con->fake_username = '\0';
       *con->fake_hostname = '\0';
       *con->fake_roomname = '\0';
       *con->cs_clientinfo = '\0';
       safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
       safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
       con->cs_UDSclientUID = -1;
       con->cs_host[sizeof con->cs_host - 1] = 0;
       if (!CC->is_local_socket) {
              locate_host(con->cs_host, sizeof con->cs_host,
                     con->cs_addr, sizeof con->cs_addr,
                     con->client_socket
              );
       }
       else {
              con->cs_host[0] = 0;
              con->cs_addr[0] = 0;
#ifdef HAVE_STRUCT_UCRED
              {
                     /* as http://www.wsinnovations.com/softeng/articles/uds.html told us... */
                     struct ucred credentials;
                     socklen_t ucred_length = sizeof(struct ucred);
                     
                     /*fill in the user data structure */
                     if(getsockopt(con->client_socket, SOL_SOCKET, SO_PEERCRED, &credentials, &ucred_length)) {
                            syslog(LOG_NOTICE, "could obtain credentials from unix domain socket");
                            
                     }
                     else {        
                            /* the process ID of the process on the other side of the socket */
                            /* credentials.pid; */
                            
                            /* the effective UID of the process on the other side of the socket  */
                            con->cs_UDSclientUID = credentials.uid;
                            
                            /* the effective primary GID of the process on the other side of the socket */
                            /* credentials.gid; */
                            
                            /* To get supplemental groups, we will have to look them up in our account
                               database, after a reverse lookup on the UID to get the account name.
                               We can take this opportunity to check to see if this is a legit account.
                            */
                            snprintf(con->cs_clientinfo, sizeof(con->cs_clientinfo),
                                    "PID: "F_PID_T"; UID: "F_UID_T"; GID: "F_XPID_T" ", 
                                    credentials.pid,
                                    credentials.uid,
                                    credentials.gid);
                     }
              }
#endif
       }
       con->cs_flags = 0;
       con->upload_type = UPL_FILE;
       con->dl_is_net = 0;

       con->nologin = 0;
       if (((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) || CtdlWantSingleUser()) {
              con->nologin = 1;
       }

       if (!CC->is_local_socket) {
              syslog(LOG_NOTICE, "Session (%s) started from %s (%s).\n", con->ServiceName, con->cs_host, con->cs_addr);
       }
       else {
              syslog(LOG_NOTICE, "Session (%s) started via local socket UID:%d.\n", con->ServiceName, con->cs_UDSclientUID);
       }

       /* Run any session startup routines registered by loadable modules */
       PerformSessionHooks(EVT_START);
}

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void cit_backtrace ( void  )

Definition at line 90 of file citserver.c.

{
#ifdef HAVE_BACKTRACE
       void *stack_frames[50];
       size_t size, i;
       char **strings;


       size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
       strings = backtrace_symbols(stack_frames, size);
       for (i = 0; i < size; i++) {
              if (strings != NULL)
                     syslog(LOG_ALERT, "%s\n", strings[i]);
              else
                     syslog(LOG_ALERT, "%p\n", stack_frames[i]);
       }
       free(strings);
#endif
}

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void cit_oneline_backtrace ( void  )

Definition at line 110 of file citserver.c.

{
#ifdef HAVE_BACKTRACE
       void *stack_frames[50];
       size_t size, i;
       char **strings;
       StrBuf *Buf;

       size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
       strings = backtrace_symbols(stack_frames, size);
       if (size > 0)
       {
              Buf = NewStrBuf();
              for (i = 1; i < size; i++) {
                     if (strings != NULL)
                            StrBufAppendPrintf(Buf, "%s : ", strings[i]);
                     else
                            StrBufAppendPrintf(Buf, "%p : ", stack_frames[i]);
              }
              free(strings);
              syslog(LOG_ALERT, "%s\n", ChrPtr(Buf));
              FreeStrBuf(&Buf);
       }
#endif
}
void cit_panic_backtrace ( int  SigNum)

Definition at line 139 of file citserver.c.

{
#ifdef HAVE_BACKTRACE
       void *stack_frames[10];
       size_t size, i;
       char **strings;

       printf("caught signal 11\n");
       size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
       strings = backtrace_symbols(stack_frames, size);
       for (i = 0; i < size; i++) {
              if (strings != NULL)
                     syslog(LOG_ALERT, "%s\n", strings[i]);
              else
                     syslog(LOG_ALERT, "%p\n", stack_frames[i]);
       }
       free(strings);
#endif
       exit(-1);
}

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Definition at line 964 of file citserver.c.

                                    {
       CC->internal_pgm = 1;
       cprintf("%d %s Citadel server ADMIN CONNECTION ready.\n", CIT_OK, config.c_nodename);
}

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void citproto_begin_session ( void  )

Definition at line 949 of file citserver.c.

                              {
       if (CC->nologin==1) {
              cprintf("%d %s: Too many users are already online (maximum is %d)\n",
                     ERROR + MAX_SESSIONS_EXCEEDED,
                     config.c_nodename, config.c_maxsessions
              );
              CC->kill_me = KILLME_MAX_SESSIONS_EXCEEDED;
       }
       else {
              cprintf("%d %s Citadel server ready.\n", CIT_OK, config.c_nodename);
              CC->can_receive_im = 1;
       }
}

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void cmd_asyn ( char *  argbuf)

Definition at line 843 of file citserver.c.

{
       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", CIT_OK, CC->is_async);
}

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void cmd_down ( char *  argbuf)

Definition at line 764 of file citserver.c.

                            {
       char *Reply ="%d Shutting down server.  Goodbye.\n";

       if (CtdlAccessCheck(ac_aide)) return;

       if (!IsEmptyStr(argbuf))
       {
              int state = CIT_OK;
              restart_server = extract_int(argbuf, 0);
              
              if (restart_server > 0)
              {
                     Reply = "%d citserver will now shut down and automatically restart.\n";
              }
              if ((restart_server > 0) && !running_as_daemon)
              {
                     syslog(LOG_ERR, "The user requested restart, but not running as daemon! Geronimooooooo!\n");
                     Reply = "%d Warning: citserver is not running in daemon mode and is therefore unlikely to restart automatically.\n";
                     state = ERROR;
              }
              cprintf(Reply, state);
       }
       else
       {
              cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN); 
       }
       CC->kill_me = KILLME_SERVER_SHUTTING_DOWN;
       server_shutting_down = 1;
}

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void cmd_echo ( char *  etext)

Definition at line 754 of file citserver.c.

{
       cprintf("%d %s\n", CIT_OK, etext);
}

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void cmd_emsg ( char *  mname)

Definition at line 594 of file citserver.c.

{
       FILE *mfp;
       char targ[256];
       char buf[256];
       char *dirs[2];
       int a;

       unbuffer_output();

       if (CtdlAccessCheck(ac_aide)) return;

       extract_token(buf, mname, 0, '|', sizeof buf);
       for (a=0; !IsEmptyStr(&buf[a]); ++a) {           /* security measure */
              if (buf[a] == '/') buf[a] = '.';
       }

       dirs[0] = strdup(ctdl_message_dir);
       dirs[1] = strdup(ctdl_hlp_dir);

       mesg_locate(targ, sizeof targ, buf, 2, (const ccharp*)dirs);
       free(dirs[0]);
       free(dirs[1]);

       if (IsEmptyStr(targ)) {
              snprintf(targ, sizeof targ, 
                             "%s/%s",
                             ctdl_hlp_dir, buf);
       }

       mfp = fopen(targ,"w");
       if (mfp==NULL) {
              cprintf("%d Cannot open '%s': %s\n",
                     ERROR + INTERNAL_ERROR, targ, strerror(errno));
              return;
       }
       cprintf("%d %s\n", SEND_LISTING, targ);

       while (client_getln(buf, sizeof buf) >=0 && strcmp(buf, "000")) {
              fprintf(mfp, "%s\n", buf);
       }

       fclose(mfp);
}

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void cmd_halt ( char *  argbuf)

Definition at line 798 of file citserver.c.

                            {

       if (CtdlAccessCheck(ac_aide)) return;

       cprintf("%d Halting server.  Goodbye.\n", CIT_OK);
       server_shutting_down = 1;
       shutdown_and_halt = 1;
}

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void cmd_iden ( char *  argbuf)

Definition at line 458 of file citserver.c.

{
       int dev_code;
       int cli_code;
       int rev_level;
       char desc[128];
       char from_host[128];

       if (num_parms(argbuf)<4) {
              cprintf("%d usage error\n", ERROR + ILLEGAL_VALUE);
              return;
       }

       dev_code = extract_int(argbuf,0);
       cli_code = extract_int(argbuf,1);
       rev_level = extract_int(argbuf,2);
       extract_token(desc, argbuf, 3, '|', sizeof desc);

       safestrncpy(from_host, config.c_fqdn, sizeof from_host);
       from_host[sizeof from_host - 1] = 0;
       if (num_parms(argbuf)>=5) extract_token(from_host, argbuf, 4, '|', sizeof from_host);

       CC->cs_clientdev = dev_code;
       CC->cs_clienttyp = cli_code;
       CC->cs_clientver = rev_level;
       safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
       CC->cs_clientname[31] = 0;

       /* For local sockets and public clients, trust the hostname supplied by the client */
       if ( (CC->is_local_socket) || (is_public_client()) ) {
              safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
              CC->cs_host[sizeof CC->cs_host - 1] = 0;
              CC->cs_addr[0] = 0;
       }

       syslog(LOG_NOTICE, "Client %d/%d/%01d.%02d (%s) from %s\n",
              dev_code,
              cli_code,
              (rev_level / 100),
              (rev_level % 100),
              desc,
              CC->cs_host
       );
       cprintf("%d Ok\n",CIT_OK);
}

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void cmd_info ( char *  cmdbuf)

Definition at line 270 of file citserver.c.

                            {
       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_site_location);
       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("\n");       /* nonce no longer supported */
       cprintf("1\n"); /* 1 = yes, this system supports the QNOP command */

#ifdef HAVE_LDAP
       cprintf("1\n"); /* 1 = yes, this server is LDAP-enabled */
#else
       cprintf("0\n"); /* 1 = no, this server is not LDAP-enabled */
#endif

       if (config.c_auth_mode == AUTHMODE_NATIVE) {
              cprintf("%d\n", config.c_disable_newu);
       }
       else {
              cprintf("1\n");      /* "create new user" does not work with non-native auth modes */
       }

       cprintf("%s\n", config.c_default_cal_zone);

       /* thread load averages -- temporarily disabled during refactoring of this code */
       cprintf("0\n");             /* load average */
       cprintf("0\n");             /* worker average */
       cprintf("0\n");             /* thread count */

       cprintf("1\n");             /* yes, Sieve mail filtering is supported */
       cprintf("%d\n", config.c_enable_fulltext);
       cprintf("%s\n", svn_revision());

       if (config.c_auth_mode == AUTHMODE_NATIVE) {
              cprintf("%d\n", openid_level_supported); /* OpenID is enabled when using native auth */
       }
       else {
              cprintf("0\n");      /* OpenID is disabled when using non-native auth */
       }

       cprintf("%d\n", config.c_guest_logins);
       
       cprintf("000\n");
}

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void cmd_lout ( char *  argbuf)

Definition at line 989 of file citserver.c.

{
       if (CC->logged_in) 
              CtdlUserLogout();
       cprintf("%d logged out.\n", CIT_OK);
}

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void cmd_mesg ( char *  mname)

Definition at line 508 of file citserver.c.

{
       FILE *mfp;
       char targ[256];
       char buf[256];
       char buf2[256];
       char *dirs[2];
       DIR *dp;
       struct dirent *d;

       extract_token(buf, mname, 0, '|', sizeof buf);

       dirs[0] = strdup(ctdl_message_dir);
       dirs[1] = strdup(ctdl_hlp_dir);

       snprintf(buf2, sizeof buf2, "%s.%d.%d",
              buf, CC->cs_clientdev, CC->cs_clienttyp);

       /* If the client requested "?" then produce a listing */
       if (!strcmp(buf, "?")) {
              cprintf("%d %s\n", LISTING_FOLLOWS, buf);
              dp = opendir(dirs[1]);
              if (dp != NULL) {
                     while (d = readdir(dp), d != NULL) {
                            if (d->d_name[0] != '.') {
                                   cprintf(" %s\n", d->d_name);
                            }
                     }
                     closedir(dp);
              }
              cprintf("000\n");
              free(dirs[0]);
              free(dirs[1]);
              return;
       }

       /* Otherwise, look for the requested file by name. */
       else {
              mesg_locate(targ, sizeof targ, buf2, 2, (const ccharp*)dirs);
              if (IsEmptyStr(targ)) {
                     snprintf(buf2, sizeof buf2, "%s.%d",
                                                 buf, CC->cs_clientdev);
                     mesg_locate(targ, sizeof targ, buf2, 2,
                                (const ccharp*)dirs);
                     if (IsEmptyStr(targ)) {
                            mesg_locate(targ, sizeof targ, buf, 2,
                                       (const ccharp*)dirs);
                     }      
              }
       }

       free(dirs[0]);
       free(dirs[1]);

       if (IsEmptyStr(targ)) {
              cprintf("%d '%s' not found.  (Searching in %s and %s)\n",
                     ERROR + FILE_NOT_FOUND,
                     mname,
                     ctdl_message_dir,
                     ctdl_hlp_dir
              );
              return;
       }

       mfp = fopen(targ, "r");
       if (mfp==NULL) {
              cprintf("%d Cannot open '%s': %s\n",
                     ERROR + INTERNAL_ERROR, targ, strerror(errno));
              return;
       }
       cprintf("%d %s\n", LISTING_FOLLOWS,buf);

       while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
              buf[strlen(buf)-1] = 0;
              do_help_subst(buf);
              cprintf("%s\n",buf);
       }

       fclose(mfp);
       cprintf("000\n");
}

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void cmd_more ( char *  argbuf)

Definition at line 746 of file citserver.c.

                            {
       cprintf("%d %s\n", CIT_OK, config.c_moreprompt);
}

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void cmd_noop ( char *  argbuf)

Definition at line 970 of file citserver.c.

{
       cprintf("%d%cok\n", CIT_OK, CtdlCheckExpress() );
}

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void cmd_qnop ( char *  argbuf)

Definition at line 976 of file citserver.c.

{
       /* do nothing, this command returns no response */
}

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void cmd_quit ( char *  argbuf)

Definition at line 982 of file citserver.c.

{
       cprintf("%d Goodbye.\n", CIT_OK);
       CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
}

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void cmd_scdn ( char *  argbuf)

Definition at line 811 of file citserver.c.

{
       int new_state;
       int state = CIT_OK;
       char *Reply = "%d %d\n";

       if (CtdlAccessCheck(ac_aide)) return;

       new_state = extract_int(argbuf, 0);
       if ((new_state == 2) || (new_state == 3))
       {
              restart_server = 1;
              if (!running_as_daemon)
              {
                     syslog(LOG_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
                     Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
                     state = ERROR;
              }

              restart_server = extract_int(argbuf, 0);
              new_state -= 2;
       }
       if ((new_state == 0) || (new_state == 1)) {
              ScheduledShutdown = new_state;
       }
       cprintf(Reply, state, ScheduledShutdown);
}

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void cmd_term ( char *  cmdbuf)

Definition at line 714 of file citserver.c.

{
       int session_num;
       int terminated = 0;

       session_num = extract_int(cmdbuf, 0);

       terminated = CtdlTerminateOtherSession(session_num);

       if (terminated < 0) {
              cprintf("%d You can't kill your own session.\n", ERROR + ILLEGAL_VALUE);
              return;
       }

       if (terminated & TERM_FOUND) {
              if (terminated == TERM_KILLED) {
                     cprintf("%d Session terminated.\n", CIT_OK);
              }
              else {
                     cprintf("%d You are not allowed to do that.\n",
                            ERROR + HIGHER_ACCESS_REQUIRED);
              }
       }
       else {
              cprintf("%d No such session.\n", ERROR + ILLEGAL_VALUE);
       }
}

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void cmd_time ( char *  argbuf)

Definition at line 337 of file citserver.c.

{
   time_t tv;
   struct tm tmp;
   
   tv = time(NULL);
   localtime_r(&tv, &tmp);
   
   /* timezone and daylight global variables are not portable. */
#ifdef HAVE_STRUCT_TM_TM_GMTOFF
   cprintf("%d %ld|%ld|%d|%ld\n", CIT_OK, (long)tv, tmp.tm_gmtoff, tmp.tm_isdst, server_startup_time);
#else
   cprintf("%d %ld|%ld|%d|%ld\n", CIT_OK, (long)tv, timezone, tmp.tm_isdst, server_startup_time);
#endif
}

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CTDL_MODULE_INIT ( citserver  )

Definition at line 1070 of file citserver.c.

{
       if (!threading) {
              CtdlRegisterProtoHook(cmd_noop, "NOOP", "no operation");
              CtdlRegisterProtoHook(cmd_qnop, "QNOP", "no operation with no response");
              CtdlRegisterProtoHook(cmd_quit, "QUIT", "log out and disconnect from server");
              CtdlRegisterProtoHook(cmd_lout, "LOUT", "log out but do not disconnect from server");
              CtdlRegisterProtoHook(cmd_asyn, "ASYN", "enable asynchronous server responses");
              CtdlRegisterProtoHook(cmd_info, "INFO", "fetch server capabilities and configuration");
              CtdlRegisterProtoHook(cmd_mesg, "MESG", "fetch system banners");
              CtdlRegisterProtoHook(cmd_emsg, "EMSG", "submit system banners");
              CtdlRegisterProtoHook(cmd_echo, "ECHO", "echo text back to the client");
              CtdlRegisterProtoHook(cmd_more, "MORE", "fetch the paginator prompt");
              CtdlRegisterProtoHook(cmd_iden, "IDEN", "identify the client software and location");
              CtdlRegisterProtoHook(cmd_term, "TERM", "terminate another running session");
              CtdlRegisterProtoHook(cmd_down, "DOWN", "perform a server shutdown");
              CtdlRegisterProtoHook(cmd_halt, "HALT", "halt the server without exiting the server process");
              CtdlRegisterProtoHook(cmd_scdn, "SCDN", "schedule or cancel a server shutdown");
              CtdlRegisterProtoHook(cmd_time, "TIME", "fetch the date and time from the server");
       }
        /* return our id for the Log */
       return "citserver";
}

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int CtdlAccessCheck ( int  required_level)

Definition at line 672 of file citserver.c.

                                        {

       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 ((required_level >= ac_logged_in_or_guest) && (CC->logged_in == 0) && (!config.c_guest_logins)) {
              cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
              return(-1);
       }

       if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
              cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
              return(-1);
       }

       if (CC->user.axlevel >= AxAideU) return(0);
       if (required_level >= ac_aide) {
              cprintf("%d This command requires Aide access.\n",
                     ERROR + HIGHER_ACCESS_REQUIRED);
              return(-1);
       }

       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);
       }

       /* shhh ... succeed quietly */
       return(0);
}

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char CtdlCheckExpress ( void  )

Definition at line 328 of file citserver.c.

                            {
       if (CC->FirstExpressMessage == NULL) {
              return(' ');
       }
       else {
              return('*');
       }
}

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void do_async_loop ( void  )

Definition at line 1061 of file citserver.c.

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void do_command_loop ( void  )

Definition at line 1000 of file citserver.c.

                           {
       char cmdbuf[SIZ];
       
       time(&CC->lastcmd);
       memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
       if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
              syslog(LOG_ERR, "Citadel client disconnected: ending session.\n");
              CC->kill_me = KILLME_CLIENT_DISCONNECTED;
              return;
       }

       /* Log the server command, but don't show passwords... */
       if ( (strncasecmp(cmdbuf, "PASS", 4)) && (strncasecmp(cmdbuf, "SETP", 4)) ) {
              syslog(LOG_INFO, "[%d][%s(%ld)] %s",
                     CC->cs_pid, CC->curr_user, CC->user.usernum, cmdbuf
              );
       }
       else {
              syslog(LOG_INFO, "[%d][%s(%ld)] <password command hidden from log>",
                     CC->cs_pid, CC->curr_user, CC->user.usernum
              );
       }

       buffer_output();

       /*
        * Let other clients see the last command we executed, and
        * update the idle time, but not NOOP, QNOP, PEXP, GEXP, RWHO, or TIME.
        */
       if ( (strncasecmp(cmdbuf, "NOOP", 4))
          && (strncasecmp(cmdbuf, "QNOP", 4))
          && (strncasecmp(cmdbuf, "PEXP", 4))
          && (strncasecmp(cmdbuf, "GEXP", 4))
          && (strncasecmp(cmdbuf, "RWHO", 4))
          && (strncasecmp(cmdbuf, "TIME", 4)) ) {
              strcpy(CC->lastcmdname, "    ");
              safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
              time(&CC->lastidle);
       }
       
       if ((strncasecmp(cmdbuf, "ENT0", 4))
          && (strncasecmp(cmdbuf, "MESG", 4))
          && (strncasecmp(cmdbuf, "MSGS", 4)))
       {
          CC->cs_flags &= ~CS_POSTING;
       }
                 
       if (!DLoader_Exec_Cmd(cmdbuf)) {
              cprintf("%d Unrecognized or unsupported command.\n", ERROR + CMD_NOT_SUPPORTED);
       }      

       unbuffer_output();

       /* Run any after-each-command routines registered by modules */
       PerformSessionHooks(EVT_CMD);
}

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void GenerateRoomDisplay ( char *  real_room,
CitContext viewed,
CitContext viewer 
)

Definition at line 643 of file citserver.c.

                                         {

       int ra;

       strcpy(real_room, viewed->room.QRname);
       if (viewed->room.QRflags & QR_MAILBOX) {
              strcpy(real_room, &real_room[11]);
       }
       if (viewed->room.QRflags & QR_PRIVATE) {
              CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
              if ( (ra & UA_KNOWN) == 0) {
                     strcpy(real_room, " ");
              }
       }

       if (viewed->cs_flags & CS_CHAT) {
              while (strlen(real_room) < 14) {
                     strcat(real_room, " ");
              }
              strcpy(&real_room[14], "<chat>");
       }

}

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int is_public_client ( void  )

Definition at line 360 of file citserver.c.

{
       char buf[1024];
       char addrbuf[1024];
       FILE *fp;
       int i;
       char *public_clientspos;
       char *public_clientsend;
       char *paddr = NULL;
       struct stat statbuf;
       static time_t pc_timestamp = 0;
       static char public_clients[SIZ];
       static char public_clients_file[SIZ];

#define LOCALHOSTSTR "127.0.0.1"

       snprintf(public_clients_file, sizeof public_clients_file, "%s/public_clients", ctdl_etc_dir);

       /*
        * Check the time stamp on the public_clients file.  If it's been
        * updated since the last time we were here (or if this is the first
        * time we've been through the loop), read its contents and learn
        * the IP addresses of the listed hosts.
        */
       if (stat(public_clients_file, &statbuf) != 0) {
              /* No public_clients file exists, so bail out */
              syslog(LOG_WARNING, "Warning: '%s' does not exist\n", 
                            public_clients_file);
              return(0);
       }

       if (statbuf.st_mtime > pc_timestamp) {
              begin_critical_section(S_PUBLIC_CLIENTS);
              syslog(LOG_INFO, "Loading %s\n", public_clients_file);

              public_clientspos = &public_clients[0];
              public_clientsend = public_clientspos + SIZ;
              safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
              public_clientspos += sizeof(LOCALHOSTSTR) - 1;
              
              if (hostname_to_dotted_quad(addrbuf, config.c_fqdn) == 0) {
                     *(public_clientspos++) = '|';
                     paddr = &addrbuf[0];
                     while (!IsEmptyStr (paddr) && 
                            (public_clientspos < public_clientsend))
                            *(public_clientspos++) = *(paddr++);
              }

              fp = fopen(public_clients_file, "r");
              if (fp != NULL) 
                     while ((fgets(buf, sizeof buf, fp)!=NULL) &&
                            (public_clientspos < public_clientsend)){
                            char *ptr;
                            ptr = buf;
                            while (!IsEmptyStr(ptr)) {
                                   if (*ptr == '#') {
                                          *ptr = 0;
                                          break;
                                   }
                            else ptr++;
                            }
                            ptr--;
                            while (ptr>buf && isspace(*ptr)) {
                                   *(ptr--) = 0;
                            }
                            if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
                                   *(public_clientspos++) = '|';
                                   paddr = addrbuf;
                                   while (!IsEmptyStr(paddr) && 
                                          (public_clientspos < public_clientsend)){
                                          *(public_clientspos++) = *(paddr++);
                                   }
                            }
                     }
              fclose(fp);
              pc_timestamp = time(NULL);
              end_critical_section(S_PUBLIC_CLIENTS);
       }

       syslog(LOG_DEBUG, "Checking whether %s is a local or public client\n",
              CC->cs_addr);
       for (i=0; i<num_parms(public_clients); ++i) {
              extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
              if (!strcasecmp(CC->cs_addr, addrbuf)) {
                     syslog(LOG_DEBUG, "... yes its local.\n");
                     return(1);
              }
       }

       /* No hits.  This is not a public client. */
       syslog(LOG_DEBUG, "... no it isn't.\n");
       return(0);
}

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void master_cleanup ( int  exitcode)

Definition at line 221 of file citserver.c.

                                  {
       struct CleanupFunctionHook *fcn;
       static int already_cleaning_up = 0;

       if (already_cleaning_up) while(1) usleep(1000);
       already_cleaning_up = 1;

       /* Run any cleanup routines registered by loadable modules */
       for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
              (*fcn->h_function_pointer)();
       }

       /* Close the AdjRefCount queue file */
       AdjRefCount(-1, 0);

       /* Do system-dependent stuff */
       sysdep_master_cleanup();
       
       /* Close databases */
       syslog(LOG_INFO, "Closing databases\n");
       close_databases();

       /* If the operator requested a halt but not an exit, halt here. */
       if (shutdown_and_halt) {
              syslog(LOG_NOTICE, "citserver: Halting server without exiting.\n");
              fflush(stdout); fflush(stderr);
              while(1) {
                     sleep(32767);
              }
       }
       
       release_control();

       /* Now go away. */
       syslog(LOG_NOTICE, "citserver: Exiting with status %d\n", exitcode);
       fflush(stdout); fflush(stderr);
       
       if (restart_server != 0)
              exit(1);
       if ((running_as_daemon != 0) && ((exitcode == 0) ))
              exitcode = CTDLEXIT_SHUTDOWN;
       exit(exitcode);
}

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void master_startup ( void  )

Definition at line 163 of file citserver.c.

                          {
       struct timeval tv;
       unsigned int seed;
       FILE *urandom;
       struct ctdlroom qrbuf;
       int rv;
       
       syslog(LOG_DEBUG, "master_startup() started\n");
       time(&server_startup_time);
       get_config();

       syslog(LOG_INFO, "Opening databases\n");
       open_databases();
       check_ref_counts();

       syslog(LOG_INFO, "Creating base rooms (if necessary)\n");
       CtdlCreateRoom(config.c_baseroom,  0, "", 0, 1, 0, VIEW_BBS);
       CtdlCreateRoom(AIDEROOM,           3, "", 0, 1, 0, VIEW_BBS);
       CtdlCreateRoom(SYSCONFIGROOM,             3, "", 0, 1, 0, VIEW_BBS);
       CtdlCreateRoom(config.c_twitroom,  0, "", 0, 1, 0, VIEW_BBS);

       /* The "Local System Configuration" room doesn't need to be visible */
        if (CtdlGetRoomLock(&qrbuf, SYSCONFIGROOM) == 0) {
                qrbuf.QRflags2 |= QR2_SYSTEM;
                CtdlPutRoomLock(&qrbuf);
        }

       /* Aide needs to be public postable, else we're not RFC conformant. */
        if (CtdlGetRoomLock(&qrbuf, AIDEROOM) == 0) {
                qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
                CtdlPutRoomLock(&qrbuf);
        }

       syslog(LOG_INFO, "Seeding the pseudo-random number generator...\n");
       urandom = fopen("/dev/urandom", "r");
       if (urandom != NULL) {
              rv = fread(&seed, sizeof seed, 1, urandom);
              if (rv == -1)
                     syslog(LOG_EMERG, "failed to read random seed: %s\n", 
                            strerror(errno));
              fclose(urandom);
       }
       else {
              gettimeofday(&tv, NULL);
              seed = tv.tv_usec;
       }
       srand(seed);
       srandom(seed);

       put_config();

       syslog(LOG_DEBUG, "master_startup() finished\n");
}

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Variable Documentation

Definition at line 85 of file citserver.c.

int panic_fd

Definition at line 84 of file citserver.c.

Definition at line 82 of file citserver.c.

Definition at line 83 of file citserver.c.

Definition at line 81 of file citserver.c.