citadel/modules/rwho/serv_rwho.c

   1 /*
   2  * This module implements server commands related to the display and
   3  * manipulation of the "Who's online" list.
   4  *
   5  * Copyright (c) 1987-2009 by the citadel.org team
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "sysdep.h"
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <stdio.h>
  26 #include <fcntl.h>
  27 #include <signal.h>
  28 #include <pwd.h>
  29 #include <errno.h>
  30 #include <sys/types.h>
  31
  32 #if TIME_WITH_SYS_TIME
  33 # include <sys/time.h>
  34 # include <time.h>
  35 #else
  36 # if HAVE_SYS_TIME_H
  37 #  include <sys/time.h>
  38 # else
  39 #  include <time.h>
  40 # endif
  41 #endif
  42
  43 #include <sys/wait.h>
  44 #include <string.h>
  45 #include <limits.h>
  46 #include <libcitadel.h>
  47 #include "citadel.h"
  48 #include "server.h"
  49 #include "citserver.h"
  50 #include "support.h"
  51 #include "config.h"
  52 #include "control.h"
  53 #include "user_ops.h"
  54 #include "database.h"
  55 #include "msgbase.h"
  56
  57
  58 #include "ctdl_module.h"
  59
  60
  61 /*
  62  * display who's online
  63  */
  64 void cmd_rwho(char *argbuf) {
  65         struct CitContext *nptr;
  66         int nContexts, i;
  67         int spoofed = 0;
  68         int user_spoofed = 0;
  69         int room_spoofed = 0;
  70         int host_spoofed = 0;
  71         int aide;
  72         char un[40];
  73         char real_room[ROOMNAMELEN], room[ROOMNAMELEN];
  74         char host[64], flags[5];
  75
  76         /* So that we don't keep the context list locked for a long time
  77          * we create a copy of it first
  78          */
  79
  80
  81         nptr = CtdlGetContextArray(&nContexts) ;
  82         if (!nptr)
  83         {
  84                 /* Couldn't malloc so we have to bail but stick to the protocol */
  85                 cprintf("%d%c \n", LISTING_FOLLOWS, CtdlCheckExpress() );
  86                 cprintf("000\n");
  87                 return;
  88         }
  89
  90         aide = CC->user.axlevel >= AxAideU;
  91         cprintf("%d%c \n", LISTING_FOLLOWS, CtdlCheckExpress() );
  92
  93         for (i=0; i<nContexts; i++)
  94         {
  95                 flags[0] = '\0';
  96                 spoofed = 0;
  97                 user_spoofed = 0;
  98                 room_spoofed = 0;
  99                 host_spoofed = 0;
 100
 101                 if (nptr[i].cs_flags & CS_POSTING)
 102                    strcat(flags, "*");
 103                 else
 104                    strcat(flags, ".");
 105
 106                 if (nptr[i].fake_username[0])
 107                 {
 108                    strcpy(un, nptr[i].fake_username);
 109                    spoofed = 1;
 110                    user_spoofed = 1;
 111                 }
 112                 else
 113                    strcpy(un, nptr[i].curr_user);
 114
 115                 if (nptr[i].fake_hostname[0])
 116                 {
 117                    strcpy(host, nptr[i].fake_hostname);
 118                    spoofed = 1;
 119                    host_spoofed = 1;
 120                 }
 121                 else
 122                    strcpy(host, nptr[i].cs_host);
 123
 124                 GenerateRoomDisplay(real_room, &nptr[i], CC);
 125
 126                 if (nptr[i].fake_roomname[0]) {
 127                         strcpy(room, nptr[i].fake_roomname);
 128                         spoofed = 1;
 129                         room_spoofed = 1;
 130                 }
 131                 else {
 132                         strcpy(room, real_room);
 133                 }
 134
 135                 if ((aide) && (spoofed)) {
 136                         strcat(flags, "+");
 137                 }
 138
 139                 if ((nptr[i].cs_flags & CS_STEALTH) && (aide)) {
 140                         strcat(flags, "-");
 141                 }
 142
 143                 if (((nptr[i].cs_flags&CS_STEALTH)==0) || (aide))
 144                 {
 145                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s|",
 146                                 nptr[i].cs_pid, un, room,
 147                                 host, nptr[i].cs_clientname,
 148                                 (long)(nptr[i].lastidle),
 149                                 nptr[i].lastcmdname, flags
 150                         );
 151
 152                         if ((user_spoofed) && (aide)) {
 153                                 cprintf("%s|", nptr[i].curr_user);
 154                         }
 155                         else {
 156                                 cprintf("|");
 157                         }
 158
 159                         if ((room_spoofed) && (aide)) {
 160                                 cprintf("%s|", real_room);
 161                         }
 162                         else {
 163                                 cprintf("|");
 164                         }
 165
 166                         if ((host_spoofed) && (aide)) {
 167                                 cprintf("%s|", nptr[i].cs_host);
 168                         }
 169                         else {
 170                                 cprintf("|");
 171                         }
 172
 173                         cprintf("%d\n", nptr[i].logged_in);
 174                 }
 175         }
 176
 177         /* release out copy of the context list */
 178         free(nptr);
 179
 180         /* Now it's magic time.  Before we finish, call any EVT_RWHO hooks
 181          * so that external paging modules such as serv_icq can add more
 182          * content to the Wholist.
 183          */
 184         PerformSessionHooks(EVT_RWHO);
 185         cprintf("000\n");
 186 }
 187
 188
 189 /*
 190  * Masquerade roomname
 191  */
 192 void cmd_rchg(char *argbuf)
 193 {
 194         char newroomname[ROOMNAMELEN];
 195
 196         extract_token(newroomname, argbuf, 0, '|', sizeof newroomname);
 197         newroomname[ROOMNAMELEN-1] = 0;
 198         if (!IsEmptyStr(newroomname)) {
 199                 safestrncpy(CC->fake_roomname, newroomname,
 200                         sizeof(CC->fake_roomname) );
 201         }
 202         else {
 203                 safestrncpy(CC->fake_roomname, "", sizeof CC->fake_roomname);
 204         }
 205         cprintf("%d OK\n", CIT_OK);
 206 }
 207
 208 /*
 209  * Masquerade hostname
 210  */
 211 void cmd_hchg(char *argbuf)
 212 {
 213         char newhostname[64];
 214
 215         extract_token(newhostname, argbuf, 0, '|', sizeof newhostname);
 216         if (!IsEmptyStr(newhostname)) {
 217                 safestrncpy(CC->fake_hostname, newhostname,
 218                         sizeof(CC->fake_hostname) );
 219         }
 220         else {
 221                 safestrncpy(CC->fake_hostname, "", sizeof CC->fake_hostname);
 222         }
 223         cprintf("%d OK\n", CIT_OK);
 224 }
 225
 226
 227 /*
 228  * Masquerade username (aides only)
 229  */
 230 void cmd_uchg(char *argbuf)
 231 {
 232
 233         char newusername[USERNAME_SIZE];
 234
 235         extract_token(newusername, argbuf, 0, '|', sizeof newusername);
 236
 237         if (CtdlAccessCheck(ac_aide)) return;
 238
 239         if (!IsEmptyStr(newusername)) {
 240                 CC->cs_flags &= ~CS_STEALTH;
 241                 memset(CC->fake_username, 0, 32);
 242                 if (strncasecmp(newusername, CC->curr_user,
 243                                 strlen(CC->curr_user)))
 244                         safestrncpy(CC->fake_username, newusername,
 245                                 sizeof(CC->fake_username));
 246         }
 247         else {
 248                 CC->fake_username[0] = '\0';
 249                 CC->cs_flags |= CS_STEALTH;
 250         }
 251         cprintf("%d\n",CIT_OK);
 252 }
 253
 254
 255
 256
 257 /*
 258  * enter or exit "stealth mode"
 259  */
 260 void cmd_stel(char *cmdbuf)
 261 {
 262         int requested_mode;
 263
 264         requested_mode = extract_int(cmdbuf,0);
 265
 266         if (CtdlAccessCheck(ac_logged_in)) return;
 267
 268         if (requested_mode == 1) {
 269                 CC->cs_flags = CC->cs_flags | CS_STEALTH;
 270                 PerformSessionHooks(EVT_STEALTH);
 271         }
 272         if (requested_mode == 0) {
 273                 CC->cs_flags = CC->cs_flags & ~CS_STEALTH;
 274                 PerformSessionHooks(EVT_UNSTEALTH);
 275         }
 276
 277         cprintf("%d %d\n", CIT_OK,
 278                 ((CC->cs_flags & CS_STEALTH) ? 1 : 0) );
 279 }
 280
 281
 282 CTDL_MODULE_INIT(rwho)
 283 {
 284         if(!threading)
 285         {
 286                 CtdlRegisterProtoHook(cmd_rwho, "RWHO", "Display who is online");
 287                 CtdlRegisterProtoHook(cmd_hchg, "HCHG", "Masquerade hostname");
 288                 CtdlRegisterProtoHook(cmd_rchg, "RCHG", "Masquerade roomname");
 289                 CtdlRegisterProtoHook(cmd_uchg, "UCHG", "Masquerade username");
 290                 CtdlRegisterProtoHook(cmd_stel, "STEL", "Enter/exit stealth mode");
 291         }
 292
 293         /* return our Subversion id for the Log */
 294         return "rwho";
 295 }