citadel/serv_chat.c

   1 /*
   2  * $Id$
   3  *
   4  * This module handles all "real time" communication between users.  The
   5  * modes of communication currently supported are Chat and Paging.
   6  *
   7  */
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <pwd.h>
  15 #include <errno.h>
  16 #include <sys/types.h>
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #include <sys/wait.h>
  30 #include <string.h>
  31 #include <limits.h>
  32 #include "citadel.h"
  33 #include "server.h"
  34 #include "serv_extensions.h"
  35 #include "serv_chat.h"
  36 #include "sysdep_decls.h"
  37 #include "citserver.h"
  38 #include "support.h"
  39 #include "config.h"
  40 #include "tools.h"
  41 #include "msgbase.h"
  42 #include "user_ops.h"
  43 #include "room_ops.h"
  44
  45 #ifndef HAVE_SNPRINTF
  46 #include "snprintf.h"
  47 #endif
  48
  49 struct ChatLine *ChatQueue = NULL;
  50 int ChatLastMsg = 0;
  51
  52 /*
  53  * This message can be set to anything you want, but it is
  54  * checked for consistency so don't move it away from here.
  55  */
  56 #define KICKEDMSG "You have been kicked out of this room."
  57
  58 void allwrite(char *cmdbuf, int flag, char *username)
  59 {
  60         FILE *fp;
  61         char bcast[SIZ];
  62         char *un;
  63         struct ChatLine *clptr, *clnew;
  64         time_t now;
  65
  66         if (CC->fake_username[0])
  67                 un = CC->fake_username;
  68         else
  69                 un = CC->user.fullname;
  70         if (flag == 1) {
  71                 snprintf(bcast, sizeof bcast, ":|<%s %s>", un, cmdbuf);
  72         } else if (flag == 0) {
  73                 snprintf(bcast, sizeof bcast, "%s|%s", un, cmdbuf);
  74         } else if (flag == 2) {
  75                 snprintf(bcast, sizeof bcast, ":|<%s whispers %s>", un, cmdbuf);
  76         } else if (flag == 3) {
  77                 snprintf(bcast, sizeof bcast, ":|%s", KICKEDMSG);
  78         }
  79         if ((strcasecmp(cmdbuf, "NOOP")) && (flag != 2)) {
  80                 fp = fopen(CHATLOG, "a");
  81                 if (fp != NULL)
  82                         fprintf(fp, "%s\n", bcast);
  83                 fclose(fp);
  84         }
  85         clnew = (struct ChatLine *) mallok(sizeof(struct ChatLine));
  86         memset(clnew, 0, sizeof(struct ChatLine));
  87         if (clnew == NULL) {
  88                 fprintf(stderr, "citserver: cannot alloc chat line: %s\n",
  89                         strerror(errno));
  90                 return;
  91         }
  92         time(&now);
  93         clnew->next = NULL;
  94         clnew->chat_time = now;
  95         safestrncpy(clnew->chat_room, CC->room.QRname,
  96                         sizeof clnew->chat_room);
  97         clnew->chat_room[sizeof clnew->chat_room - 1] = 0;
  98         if (username) {
  99                 safestrncpy(clnew->chat_username, username,
 100                         sizeof clnew->chat_username);
 101                 clnew->chat_username[sizeof clnew->chat_username - 1] = 0;
 102         } else
 103                 clnew->chat_username[0] = '\0';
 104         safestrncpy(clnew->chat_text, bcast, sizeof clnew->chat_text);
 105
 106         /* Here's the critical section.
 107          * First, add the new message to the queue...
 108          */
 109         begin_critical_section(S_CHATQUEUE);
 110         ++ChatLastMsg;
 111         clnew->chat_seq = ChatLastMsg;
 112         if (ChatQueue == NULL) {
 113                 ChatQueue = clnew;
 114         } else {
 115                 for (clptr = ChatQueue; clptr->next != NULL; clptr = clptr->next);;
 116                 clptr->next = clnew;
 117         }
 118
 119         /* Then, before releasing the lock, free the expired messages */
 120         while ((ChatQueue != NULL) && (now - ChatQueue->chat_time >= 120L)) {
 121                 clptr = ChatQueue;
 122                 ChatQueue = ChatQueue->next;
 123                 phree(clptr);
 124         }
 125         end_critical_section(S_CHATQUEUE);
 126 }
 127
 128
 129 t_context *find_context(char **unstr)
 130 {
 131         t_context *t_cc, *found_cc = NULL;
 132         char *name, *tptr;
 133
 134         if ((!*unstr) || (!unstr))
 135                 return (NULL);
 136
 137         begin_critical_section(S_SESSION_TABLE);
 138         for (t_cc = ContextList; ((t_cc) && (!found_cc)); t_cc = t_cc->next) {
 139                 if (t_cc->fake_username[0])
 140                         name = t_cc->fake_username;
 141                 else
 142                         name = t_cc->curr_user;
 143                 tptr = *unstr;
 144                 if ((!strncasecmp(name, tptr, strlen(name))) && (tptr[strlen(name)] == ' ')) {
 145                         found_cc = t_cc;
 146                         *unstr = &(tptr[strlen(name) + 1]);
 147                 }
 148         }
 149         end_critical_section(S_SESSION_TABLE);
 150
 151         return (found_cc);
 152 }
 153
 154 /*
 155  * List users in chat.
 156  * allflag ==   0 = list users in chat
 157  *              1 = list users in chat, followed by users not in chat
 158  *              2 = display count only
 159  */
 160
 161 void do_chat_listing(int allflag)
 162 {
 163         struct CitContext *ccptr;
 164         int count = 0;
 165         int count_elsewhere = 0;
 166         char roomname[ROOMNAMELEN];
 167
 168         if ((allflag == 0) || (allflag == 1))
 169                 cprintf(":|\n:| Users currently in chat:\n");
 170         begin_critical_section(S_SESSION_TABLE);
 171         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 172                 if (ccptr->cs_flags & CS_CHAT) {
 173                         if (!strcasecmp(ccptr->room.QRname,
 174                            CC->room.QRname)) {
 175                                 ++count;
 176                         }
 177                         else {
 178                                 ++count_elsewhere;
 179                         }
 180                 }
 181
 182                 GenerateRoomDisplay(roomname, ccptr, CC);
 183                 if ((CC->user.axlevel < 6)
 184                    && (strlen(ccptr->fake_roomname)>0)) {
 185                         strcpy(roomname, ccptr->fake_roomname);
 186                 }
 187
 188                 if ((ccptr->cs_flags & CS_CHAT)
 189                     && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 190                         if ((allflag == 0) || (allflag == 1)) {
 191                                 cprintf(":| %-25s <%s>:\n",
 192                                         (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user,
 193                                         roomname);
 194                         }
 195                 }
 196         }
 197
 198         if (allflag == 1) {
 199                 cprintf(":|\n:| Users not in chat:\n");
 200                 for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 201
 202                         GenerateRoomDisplay(roomname, ccptr, CC);
 203                         if ((CC->user.axlevel < 6)
 204                         && (strlen(ccptr->fake_roomname)>0)) {
 205                                 strcpy(roomname, ccptr->fake_roomname);
 206                         }
 207
 208                         if (((ccptr->cs_flags & CS_CHAT) == 0)
 209                             && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 210                                 cprintf(":| %-25s <%s>:\n",
 211                                         (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user,
 212                                         roomname);
 213                         }
 214                 }
 215         }
 216         end_critical_section(S_SESSION_TABLE);
 217
 218         if (allflag == 2) {
 219                 if (count > 1) {
 220                         cprintf(":|There are %d users here.\n", count);
 221                 }
 222                 else {
 223                         cprintf(":|Note: you are the only one here.\n");
 224                 }
 225                 if (count_elsewhere > 0) {
 226                         cprintf(":|There are %d users chatting in other rooms.\n", count_elsewhere);
 227                 }
 228         }
 229
 230         cprintf(":|\n");
 231 }
 232
 233
 234 void cmd_chat(char *argbuf)
 235 {
 236         char cmdbuf[SIZ];
 237         char *un;
 238         char *strptr1;
 239         int MyLastMsg, ThisLastMsg;
 240         struct ChatLine *clptr;
 241         struct CitContext *t_context;
 242         int retval;
 243
 244         if (!(CC->logged_in)) {
 245                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 246                 return;
 247         }
 248
 249         CC->cs_flags = CC->cs_flags | CS_CHAT;
 250         cprintf("%d Entering chat mode (type '/help' for available commands)\n",
 251                 START_CHAT_MODE);
 252
 253         MyLastMsg = ChatLastMsg;
 254
 255         if ((CC->cs_flags & CS_STEALTH) == 0) {
 256                 allwrite("<entering chat>", 0, NULL);
 257         }
 258         strcpy(cmdbuf, "");
 259
 260         do_chat_listing(2);
 261
 262         while (1) {
 263                 int ok_cmd;
 264                 int linelen;
 265
 266                 ok_cmd = 0;
 267                 linelen = strlen(cmdbuf);
 268                 if (linelen > 100) --linelen;   /* truncate too-long lines */
 269                 cmdbuf[linelen + 1] = 0;
 270
 271                 retval = client_read_to(&cmdbuf[linelen], 1, 2);
 272
 273                 if (retval < 0 || CC->kill_me) {        /* socket broken? */
 274                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 275                                 allwrite("<disconnected>", 0, NULL);
 276                         }
 277                         return;
 278                 }
 279
 280                 /* if we have a complete line, do send processing */
 281                 if (strlen(cmdbuf) > 0)
 282                         if (cmdbuf[strlen(cmdbuf) - 1] == 10) {
 283                                 cmdbuf[strlen(cmdbuf) - 1] = 0;
 284                                 time(&CC->lastcmd);
 285                                 time(&CC->lastidle);
 286
 287                                 if ((!strcasecmp(cmdbuf, "exit"))
 288                                     || (!strcasecmp(cmdbuf, "/exit"))
 289                                     || (!strcasecmp(cmdbuf, "quit"))
 290                                     || (!strcasecmp(cmdbuf, "logout"))
 291                                     || (!strcasecmp(cmdbuf, "logoff"))
 292                                     || (!strcasecmp(cmdbuf, "/q"))
 293                                     || (!strcasecmp(cmdbuf, ".q"))
 294                                     || (!strcasecmp(cmdbuf, "/quit"))
 295                                     )
 296                                         strcpy(cmdbuf, "000");
 297
 298                                 if (!strcmp(cmdbuf, "000")) {
 299                                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 300                                                 allwrite("<exiting chat>", 0, NULL);
 301                                         }
 302                                         sleep(1);
 303                                         cprintf("000\n");
 304                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 305                                         return;
 306                                 }
 307                                 if ((!strcasecmp(cmdbuf, "/help"))
 308                                     || (!strcasecmp(cmdbuf, "help"))
 309                                     || (!strcasecmp(cmdbuf, "/?"))
 310                                     || (!strcasecmp(cmdbuf, "?"))) {
 311                                         cprintf(":|\n");
 312                                         cprintf(":|Available commands: \n");
 313                                         cprintf(":|/help   (prints this message) \n");
 314                                         cprintf(":|/who    (list users currently in chat) \n");
 315                                         cprintf(":|/whobbs (list users in chat -and- elsewhere) \n");
 316                                         cprintf(":|/me     ('action' line, ala irc) \n");
 317                                         cprintf(":|/msg    (send private message, ala irc) \n");
 318                                         if (is_room_aide()) {
 319                                                 cprintf(":|/kick   (kick another user out of this room) \n");
 320                                         }
 321                                         cprintf(":|/quit   (return to the BBS) \n");
 322                                         cprintf(":|\n");
 323                                         ok_cmd = 1;
 324                                 }
 325                                 if (!strcasecmp(cmdbuf, "/who")) {
 326                                         do_chat_listing(0);
 327                                         ok_cmd = 1;
 328                                 }
 329                                 if (!strcasecmp(cmdbuf, "/whobbs")) {
 330                                         do_chat_listing(1);
 331                                         ok_cmd = 1;
 332                                 }
 333                                 if (!strncasecmp(cmdbuf, "/me ", 4)) {
 334                                         allwrite(&cmdbuf[4], 1, NULL);
 335                                         ok_cmd = 1;
 336                                 }
 337                                 if (!strncasecmp(cmdbuf, "/msg ", 5)) {
 338                                         ok_cmd = 1;
 339                                         strptr1 = &cmdbuf[5];
 340                                         if ((t_context = find_context(&strptr1))) {
 341                                                 allwrite(strptr1, 2, CC->curr_user);
 342                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 343                                                         allwrite(strptr1, 2, t_context->curr_user);
 344                                         } else
 345                                                 cprintf(":|User not found.\n");
 346                                         cprintf("\n");
 347                                 }
 348                                 /* The /kick function is implemented by sending a specific
 349                                  * message to the kicked-out user's context.  When that message
 350                                  * is processed by the read loop, that context will exit.
 351                                  */
 352                                 if ( (!strncasecmp(cmdbuf, "/kick ", 6)) && (is_room_aide()) ) {
 353                                         ok_cmd = 1;
 354                                         strptr1 = &cmdbuf[6];
 355                                         strcat(strptr1, " ");
 356                                         if ((t_context = find_context(&strptr1))) {
 357                                                 allwrite(strptr1, 3, CC->curr_user);
 358                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 359                                                         allwrite(strptr1, 2, t_context->curr_user);
 360                                         } else
 361                                                 cprintf(":|User not found.\n");
 362                                         cprintf("\n");
 363                                 }
 364                                 if ((cmdbuf[0] != '/') && (strlen(cmdbuf) > 0)) {
 365                                         ok_cmd = 1;
 366                                         allwrite(cmdbuf, 0, NULL);
 367                                 }
 368                                 if ((!ok_cmd) && (cmdbuf[0]) && (cmdbuf[0] != '\n'))
 369                                         cprintf(":|Command %s is not understood.\n", cmdbuf);
 370
 371                                 strcpy(cmdbuf, "");
 372
 373                         }
 374                 /* now check the queue for new incoming stuff */
 375
 376                 if (CC->fake_username[0])
 377                         un = CC->fake_username;
 378                 else
 379                         un = CC->curr_user;
 380                 if (ChatLastMsg > MyLastMsg) {
 381                         ThisLastMsg = ChatLastMsg;
 382                         for (clptr = ChatQueue; clptr != NULL; clptr = clptr->next) {
 383                                 if ((clptr->chat_seq > MyLastMsg) && ((!clptr->chat_username[0]) || (!strncasecmp(un, clptr->chat_username, 32)))) {
 384                                         if ((!clptr->chat_room[0]) || (!strncasecmp(CC->room.QRname, clptr->chat_room, ROOMNAMELEN))) {
 385                                                 /* Output new chat data */
 386                                                 cprintf("%s\n", clptr->chat_text);
 387
 388                                                 /* See if we've been force-quitted (kicked etc.) */
 389                                                 if (!strcmp(&clptr->chat_text[2], KICKEDMSG)) {
 390                                                         cprintf("000\n");
 391                                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 392                                                         return;
 393                                                 }
 394                                         }
 395                                 }
 396                         }
 397                         MyLastMsg = ThisLastMsg;
 398                 }
 399         }
 400 }
 401
 402
 403
 404 /*
 405  * Delete any remaining express messages
 406  */
 407 void delete_express_messages(void) {
 408         struct ExpressMessage *ptr;
 409
 410         begin_critical_section(S_SESSION_TABLE);
 411         while (CC->FirstExpressMessage != NULL) {
 412                 ptr = CC->FirstExpressMessage->next;
 413                 if (CC->FirstExpressMessage->text != NULL)
 414                         phree(CC->FirstExpressMessage->text);
 415                 phree(CC->FirstExpressMessage);
 416                 CC->FirstExpressMessage = ptr;
 417                 }
 418         end_critical_section(S_SESSION_TABLE);
 419         }
 420
 421
 422
 423
 424 /*
 425  * Poll for express messages (OLD METHOD -- ***DEPRECATED ***)
 426  */
 427 void cmd_pexp(char *argbuf)
 428 {
 429         struct ExpressMessage *ptr, *holdptr;
 430
 431         if (CC->FirstExpressMessage == NULL) {
 432                 cprintf("%d No express messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
 433                 return;
 434         }
 435         begin_critical_section(S_SESSION_TABLE);
 436         ptr = CC->FirstExpressMessage;
 437         CC->FirstExpressMessage = NULL;
 438         end_critical_section(S_SESSION_TABLE);
 439
 440         cprintf("%d Express msgs:\n", LISTING_FOLLOWS);
 441         while (ptr != NULL) {
 442                 if (ptr->flags && EM_BROADCAST)
 443                         cprintf("Broadcast message ");
 444                 else if (ptr->flags && EM_CHAT)
 445                         cprintf("Chat request ");
 446                 else if (ptr->flags && EM_GO_AWAY)
 447                         cprintf("Please logoff now, as requested ");
 448                 else
 449                         cprintf("Message ");
 450                 cprintf("from %s:\n", ptr->sender);
 451                 if (ptr->text != NULL)
 452                         memfmout(80, ptr->text, 0, "\n");
 453
 454                 holdptr = ptr->next;
 455                 if (ptr->text != NULL) phree(ptr->text);
 456                 phree(ptr);
 457                 ptr = holdptr;
 458         }
 459         cprintf("000\n");
 460 }
 461
 462
 463 /*
 464  * Get express messages (new method)
 465  */
 466 void cmd_gexp(char *argbuf) {
 467         struct ExpressMessage *ptr;
 468
 469         if (CC->FirstExpressMessage == NULL) {
 470                 cprintf("%d No express messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
 471                 return;
 472         }
 473
 474         begin_critical_section(S_SESSION_TABLE);
 475         ptr = CC->FirstExpressMessage;
 476         CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 477         end_critical_section(S_SESSION_TABLE);
 478
 479         cprintf("%d %d|%ld|%d|%s|%s\n",
 480                 LISTING_FOLLOWS,
 481                 ((ptr->next != NULL) ? 1 : 0),          /* more msgs? */
 482                 (long)ptr->timestamp,                           /* time sent */
 483                 ptr->flags,                             /* flags */
 484                 ptr->sender,                            /* sender of msg */
 485                 config.c_nodename);                     /* static for now */
 486         if (ptr->text != NULL) {
 487                 memfmout(80, ptr->text, 0, "\n");
 488                 if (ptr->text[strlen(ptr->text)-1] != '\n') cprintf("\n");
 489                 phree(ptr->text);
 490                 }
 491         cprintf("000\n");
 492         phree(ptr);
 493 }
 494
 495 /*
 496  * Asynchronously deliver express messages'
 497  */
 498 void cmd_gexp_async(void) {
 499
 500         /* Only do this if the session can handle asynchronous protocol */
 501         if (CC->is_async == 0) return;
 502
 503         /* And don't do it if there's nothing to send. */
 504         if (CC->FirstExpressMessage == NULL) return;
 505
 506         cprintf("%d express msg\n", ASYNC_MSG + ASYNC_GEXP);
 507         cmd_gexp("");
 508 }
 509
 510 /*
 511  * Back end support function for send_express_message() and company
 512  */
 513 void add_xmsg_to_context(struct CitContext *ccptr,
 514                         struct ExpressMessage *newmsg)
 515 {
 516         struct ExpressMessage *findend;
 517
 518         if (ccptr->FirstExpressMessage == NULL) {
 519                 ccptr->FirstExpressMessage = newmsg;
 520         }
 521         else {
 522                 findend = ccptr->FirstExpressMessage;
 523                 while (findend->next != NULL) {
 524                         findend = findend->next;
 525                 }
 526                 findend->next = newmsg;
 527         }
 528 }
 529
 530
 531
 532
 533 /*
 534  * This is the back end to the express message sending function.
 535  * Returns the number of users to which the message was sent.
 536  * Sending a zero-length message tests for recipients without sending messages.
 537  */
 538 int send_express_message(char *lun, char *x_user, char *x_msg)
 539 {
 540         int message_sent = 0;           /* number of successful sends */
 541
 542         struct CitContext *ccptr;
 543         struct ExpressMessage *newmsg;
 544         char *un;
 545         size_t msglen = 0;
 546         int do_send = 0;                /* set to 1 to actually page, not
 547                                          * just check to see if we can.
 548                                          */
 549         struct savelist *sl = NULL;     /* list of rooms to save this page */
 550         struct savelist *sptr;
 551         struct CtdlMessage *logmsg;
 552         long msgnum;
 553
 554         if (strlen(x_msg) > 0) {
 555                 msglen = strlen(x_msg) + 4;
 556                 do_send = 1;
 557                 }
 558
 559         /* find the target user's context and append the message */
 560         begin_critical_section(S_SESSION_TABLE);
 561         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 562
 563                 if (ccptr->fake_username[0])    /* <bc> */
 564                         un = ccptr->fake_username;
 565                 else
 566                         un = ccptr->user.fullname;
 567
 568                 if ( ((!strcasecmp(un, x_user))
 569                     || (!strcasecmp(x_user, "broadcast")))
 570                     && ((ccptr->disable_exp == 0)
 571                     || (CC->user.axlevel >= 6)) ) {
 572                         if (do_send) {
 573                                 newmsg = (struct ExpressMessage *)
 574                                         mallok(sizeof (struct ExpressMessage));
 575                                 memset(newmsg, 0,
 576                                         sizeof (struct ExpressMessage));
 577                                 time(&(newmsg->timestamp));
 578                                 safestrncpy(newmsg->sender, lun,
 579                                             sizeof newmsg->sender);
 580                                 if (!strcasecmp(x_user, "broadcast"))
 581                                         newmsg->flags |= EM_BROADCAST;
 582                                 newmsg->text = strdoop(x_msg);
 583
 584                                 add_xmsg_to_context(ccptr, newmsg);
 585
 586                                 /* and log it ... */
 587                                 if (ccptr != CC) {
 588                                         sptr = (struct savelist *)
 589                                                 malloc(sizeof(struct savelist));
 590                                         sptr->next = sl;
 591                                         MailboxName(sptr->roomname,
 592                                                     sizeof sptr->roomname,
 593                                                 &ccptr->user, PAGELOGROOM);
 594                                         sl = sptr;
 595                                 }
 596                         }
 597                         ++message_sent;
 598                 }
 599         }
 600         end_critical_section(S_SESSION_TABLE);
 601
 602         /* Log the page to disk if configured to do so  */
 603         if ( (do_send) && (message_sent) ) {
 604
 605                 logmsg = mallok(sizeof(struct CtdlMessage));
 606                 memset(logmsg, 0, sizeof(struct CtdlMessage));
 607                 logmsg->cm_magic = CTDLMESSAGE_MAGIC;
 608                 logmsg->cm_anon_type = MES_NORMAL;
 609                 logmsg->cm_format_type = 0;
 610                 logmsg->cm_fields['A'] = strdoop(lun);
 611                 logmsg->cm_fields['N'] = strdoop(NODENAME);
 612                 logmsg->cm_fields['O'] = strdoop(PAGELOGROOM);
 613                 logmsg->cm_fields['R'] = strdoop(x_user);
 614                 logmsg->cm_fields['M'] = strdoop(x_msg);
 615
 616
 617                 /* Save a copy of the message in the sender's log room,
 618                  * creating the room if necessary.
 619                  */
 620                 create_room(PAGELOGROOM, 4, "", 0, 1, 0);
 621                 msgnum = CtdlSubmitMsg(logmsg, NULL, PAGELOGROOM);
 622
 623                 /* Now save a copy in the global log room, if configured */
 624                 if (strlen(config.c_logpages) > 0) {
 625                         create_room(config.c_logpages, 3, "", 0, 1, 1);
 626                         CtdlSaveMsgPointerInRoom(config.c_logpages, msgnum, 0);
 627                 }
 628
 629                 /* Save a copy in each recipient's log room, creating those
 630                  * rooms if necessary.  Note that we create as a type 5 room
 631                  * rather than 4, which indicates that it's a personal room
 632                  * but we've already supplied the namespace prefix.
 633                  */
 634                 while (sl != NULL) {
 635                         create_room(sl->roomname, 5, "", 0, 1, 1);
 636                         CtdlSaveMsgPointerInRoom(sl->roomname, msgnum, 0);
 637                         sptr = sl->next;
 638                         phree(sl);
 639                         sl = sptr;
 640                 }
 641
 642                 CtdlFreeMessage(logmsg);
 643         }
 644
 645         return (message_sent);
 646 }
 647
 648 /*
 649  * send express messages  <bc>
 650  */
 651 void cmd_sexp(char *argbuf)
 652 {
 653         int message_sent = 0;
 654         char x_user[SIZ];
 655         char x_msg[SIZ];
 656         char *lun;              /* <bc> */
 657         char *x_big_msgbuf = NULL;
 658
 659         if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
 660                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 661                 return;
 662         }
 663         if (CC->fake_username[0])
 664                 lun = CC->fake_username;
 665         else
 666                 lun = CC->user.fullname;
 667
 668         extract(x_user, argbuf, 0);
 669
 670         extract(x_msg, argbuf, 1);
 671
 672         if (!x_user[0]) {
 673                 cprintf("%d You were not previously paged.\n", ERROR + NO_SUCH_USER);
 674                 return;
 675         }
 676         if ((!strcasecmp(x_user, "broadcast")) && (CC->user.axlevel < 6)) {
 677                 cprintf("%d Higher access required to send a broadcast.\n",
 678                         ERROR + HIGHER_ACCESS_REQUIRED);
 679                 return;
 680         }
 681         /* This loop handles text-transfer pages */
 682         if (!strcmp(x_msg, "-")) {
 683                 message_sent = PerformXmsgHooks(lun, x_user, "");
 684                 if (message_sent == 0) {
 685                         cprintf("%d '%s' is not logged in "
 686                                 "or is not accepting pages.\n",
 687                                 ERROR + NO_SUCH_USER, x_user);
 688                         return;
 689                 }
 690                 cprintf("%d Transmit message (will deliver to %d users)\n",
 691                         SEND_LISTING, message_sent);
 692                 x_big_msgbuf = mallok(SIZ);
 693                 memset(x_big_msgbuf, 0, SIZ);
 694                 while (client_gets(x_msg), strcmp(x_msg, "000")) {
 695                         x_big_msgbuf = reallok(x_big_msgbuf,
 696                                strlen(x_big_msgbuf) + strlen(x_msg) + 4);
 697                         if (strlen(x_big_msgbuf) > 0)
 698                            if (x_big_msgbuf[strlen(x_big_msgbuf)] != '\n')
 699                                 strcat(x_big_msgbuf, "\n");
 700                         strcat(x_big_msgbuf, x_msg);
 701                 }
 702                 PerformXmsgHooks(lun, x_user, x_big_msgbuf);
 703                 phree(x_big_msgbuf);
 704
 705                 /* This loop handles inline pages */
 706         } else {
 707                 message_sent = PerformXmsgHooks(lun, x_user, x_msg);
 708
 709                 if (message_sent > 0) {
 710                         if (strlen(x_msg) > 0)
 711                                 cprintf("%d Message sent", CIT_OK);
 712                         else
 713                                 cprintf("%d Ok to send message", CIT_OK);
 714                         if (message_sent > 1)
 715                                 cprintf(" to %d users", message_sent);
 716                         cprintf(".\n");
 717                 } else {
 718                         cprintf("%d '%s' is not logged in "
 719                                 "or is not accepting pages.\n",
 720                                 ERROR + NO_SUCH_USER, x_user);
 721                 }
 722
 723
 724         }
 725 }
 726
 727
 728
 729 /*
 730  * Enter or exit paging-disabled mode
 731  */
 732 void cmd_dexp(char *argbuf)
 733 {
 734         int new_state;
 735
 736         if (CtdlAccessCheck(ac_logged_in)) return;
 737
 738         new_state = extract_int(argbuf, 0);
 739         if ((new_state == 0) || (new_state == 1)) {
 740                 CC->disable_exp = new_state;
 741         }
 742
 743         cprintf("%d %d\n", CIT_OK, CC->disable_exp);
 744 }
 745
 746
 747 /*
 748  * Request client termination
 749  */
 750 void cmd_reqt(char *argbuf) {
 751         struct CitContext *ccptr;
 752         int sessions = 0;
 753         int which_session;
 754         struct ExpressMessage *newmsg;
 755
 756         if (CtdlAccessCheck(ac_aide)) return;
 757         which_session = extract_int(argbuf, 0);
 758
 759         begin_critical_section(S_SESSION_TABLE);
 760         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 761                 if ((ccptr->cs_pid == which_session) || (which_session == 0)) {
 762
 763                         newmsg = (struct ExpressMessage *)
 764                                 mallok(sizeof (struct ExpressMessage));
 765                         memset(newmsg, 0,
 766                                 sizeof (struct ExpressMessage));
 767                         time(&(newmsg->timestamp));
 768                         safestrncpy(newmsg->sender, CC->user.fullname,
 769                                     sizeof newmsg->sender);
 770                         newmsg->flags |= EM_GO_AWAY;
 771                         newmsg->text = strdoop("Automatic logoff requested.");
 772
 773                         add_xmsg_to_context(ccptr, newmsg);
 774                         ++sessions;
 775
 776                 }
 777         }
 778         end_critical_section(S_SESSION_TABLE);
 779         cprintf("%d Sent termination request to %d sessions.\n", CIT_OK, sessions);
 780 }
 781
 782
 783
 784 char *serv_chat_init(void)
 785 {
 786         CtdlRegisterProtoHook(cmd_chat, "CHAT", "Begin real-time chat");
 787         CtdlRegisterProtoHook(cmd_pexp, "PEXP", "Poll for express messages");
 788         CtdlRegisterProtoHook(cmd_gexp, "GEXP", "Get express messages");
 789         CtdlRegisterProtoHook(cmd_sexp, "SEXP", "Send an express message");
 790         CtdlRegisterProtoHook(cmd_dexp, "DEXP", "Disable express messages");
 791         CtdlRegisterProtoHook(cmd_reqt, "REQT", "Request client termination");
 792         CtdlRegisterSessionHook(cmd_gexp_async, EVT_CMD);
 793         CtdlRegisterSessionHook(delete_express_messages, EVT_STOP);
 794         CtdlRegisterXmsgHook(send_express_message, XMSG_PRI_LOCAL);
 795         return "$Id$";
 796 }
 797