citadel/modules/chat/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 <libcitadel.h>
  33 #include "citadel.h"
  34 #include "server.h"
  35 #include "serv_chat.h"
  36 #include "citserver.h"
  37 #include "support.h"
  38 #include "config.h"
  39 #include "msgbase.h"
  40 #include "user_ops.h"
  41 #include "room_ops.h"
  42
  43 #ifndef HAVE_SNPRINTF
  44 #include "snprintf.h"
  45 #endif
  46
  47
  48 #include "ctdl_module.h"
  49
  50
  51
  52 struct ChatLine *ChatQueue = NULL;
  53 int ChatLastMsg = 0;
  54
  55 /*
  56  * This message can be set to anything you want, but it is
  57  * checked for consistency so don't move it away from here.
  58  */
  59 #define KICKEDMSG "You have been kicked out of this room."
  60
  61 void allwrite(char *cmdbuf, int flag, char *username)
  62 {
  63         FILE *fp;
  64         char bcast[SIZ];
  65         char *un;
  66         struct ChatLine *clptr, *clnew;
  67         time_t now;
  68
  69         if (CC->fake_username[0])
  70                 un = CC->fake_username;
  71         else
  72                 un = CC->user.fullname;
  73         if (flag == 1) {
  74                 snprintf(bcast, sizeof bcast, ":|<%s %s>", un, cmdbuf);
  75         } else if (flag == 0) {
  76                 snprintf(bcast, sizeof bcast, "%s|%s", un, cmdbuf);
  77         } else if (flag == 2) {
  78                 snprintf(bcast, sizeof bcast, ":|<%s whispers %s>", un, cmdbuf);
  79         } else if (flag == 3) {
  80                 snprintf(bcast, sizeof bcast, ":|%s", KICKEDMSG);
  81         }
  82         if ((strcasecmp(cmdbuf, "NOOP")) && (flag != 2)) {
  83                 fp = fopen(CHATLOG, "a");
  84                 if (fp != NULL)
  85                         fprintf(fp, "%s\n", bcast);
  86                 fclose(fp);
  87         }
  88         clnew = (struct ChatLine *) malloc(sizeof(struct ChatLine));
  89         memset(clnew, 0, sizeof(struct ChatLine));
  90         if (clnew == NULL) {
  91                 fprintf(stderr, "citserver: cannot alloc chat line: %s\n",
  92                         strerror(errno));
  93                 return;
  94         }
  95         time(&now);
  96         clnew->next = NULL;
  97         clnew->chat_time = now;
  98         safestrncpy(clnew->chat_room, CC->room.QRname,
  99                         sizeof clnew->chat_room);
 100         clnew->chat_room[sizeof clnew->chat_room - 1] = 0;
 101         if (username) {
 102                 safestrncpy(clnew->chat_username, username,
 103                         sizeof clnew->chat_username);
 104                 clnew->chat_username[sizeof clnew->chat_username - 1] = 0;
 105         } else
 106                 clnew->chat_username[0] = '\0';
 107         safestrncpy(clnew->chat_text, bcast, sizeof clnew->chat_text);
 108
 109         /* Here's the critical section.
 110          * First, add the new message to the queue...
 111          */
 112         begin_critical_section(S_CHATQUEUE);
 113         ++ChatLastMsg;
 114         clnew->chat_seq = ChatLastMsg;
 115         if (ChatQueue == NULL) {
 116                 ChatQueue = clnew;
 117         } else {
 118                 for (clptr = ChatQueue; clptr->next != NULL; clptr = clptr->next);;
 119                 clptr->next = clnew;
 120         }
 121
 122         /* Then, before releasing the lock, free the expired messages */
 123         while ((ChatQueue != NULL) && (now - ChatQueue->chat_time >= 120L)) {
 124                 clptr = ChatQueue;
 125                 ChatQueue = ChatQueue->next;
 126                 free(clptr);
 127         }
 128         end_critical_section(S_CHATQUEUE);
 129 }
 130
 131
 132 t_context *find_context(char **unstr)
 133 {
 134         t_context *t_cc, *found_cc = NULL;
 135         char *name, *tptr;
 136
 137         if ((!*unstr) || (!unstr))
 138                 return (NULL);
 139
 140         begin_critical_section(S_SESSION_TABLE);
 141         for (t_cc = ContextList; ((t_cc) && (!found_cc)); t_cc = t_cc->next) {
 142                 if (t_cc->fake_username[0])
 143                         name = t_cc->fake_username;
 144                 else
 145                         name = t_cc->curr_user;
 146                 tptr = *unstr;
 147                 if ((!strncasecmp(name, tptr, strlen(name))) && (tptr[strlen(name)] == ' ')) {
 148                         found_cc = t_cc;
 149                         *unstr = &(tptr[strlen(name) + 1]);
 150                 }
 151         }
 152         end_critical_section(S_SESSION_TABLE);
 153
 154         return (found_cc);
 155 }
 156
 157 /*
 158  * List users in chat.
 159  * allflag ==   0 = list users in chat
 160  *              1 = list users in chat, followed by users not in chat
 161  *              2 = display count only
 162  */
 163
 164 void do_chat_listing(int allflag)
 165 {
 166         struct CitContext *ccptr;
 167         int count = 0;
 168         int count_elsewhere = 0;
 169         char roomname[ROOMNAMELEN];
 170
 171         if ((allflag == 0) || (allflag == 1))
 172                 cprintf(":|\n:| Users currently in chat:\n");
 173         begin_critical_section(S_SESSION_TABLE);
 174         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 175                 if (ccptr->cs_flags & CS_CHAT) {
 176                         if (!strcasecmp(ccptr->room.QRname,
 177                            CC->room.QRname)) {
 178                                 ++count;
 179                         }
 180                         else {
 181                                 ++count_elsewhere;
 182                         }
 183                 }
 184
 185                 GenerateRoomDisplay(roomname, ccptr, CC);
 186                 if ((CC->user.axlevel < 6)
 187                    && (!IsEmptyStr(ccptr->fake_roomname))) {
 188                         strcpy(roomname, ccptr->fake_roomname);
 189                 }
 190
 191                 if ((ccptr->cs_flags & CS_CHAT)
 192                     && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 193                         if ((allflag == 0) || (allflag == 1)) {
 194                                 cprintf(":| %-25s <%s>:\n",
 195                                         (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user,
 196                                         roomname);
 197                         }
 198                 }
 199         }
 200
 201         if (allflag == 1) {
 202                 cprintf(":|\n:| Users not in chat:\n");
 203                 for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 204
 205                         GenerateRoomDisplay(roomname, ccptr, CC);
 206                         if ((CC->user.axlevel < 6)
 207                         && (!IsEmptyStr(ccptr->fake_roomname))) {
 208                                 strcpy(roomname, ccptr->fake_roomname);
 209                         }
 210
 211                         if (((ccptr->cs_flags & CS_CHAT) == 0)
 212                             && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 213                                 cprintf(":| %-25s <%s>:\n",
 214                                         (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user,
 215                                         roomname);
 216                         }
 217                 }
 218         }
 219         end_critical_section(S_SESSION_TABLE);
 220
 221         if (allflag == 2) {
 222                 if (count > 1) {
 223                         cprintf(":|There are %d users here.\n", count);
 224                 }
 225                 else {
 226                         cprintf(":|Note: you are the only one here.\n");
 227                 }
 228                 if (count_elsewhere > 0) {
 229                         cprintf(":|There are %d users chatting in other rooms.\n", count_elsewhere);
 230                 }
 231         }
 232
 233         cprintf(":|\n");
 234 }
 235
 236
 237 void cmd_chat(char *argbuf)
 238 {
 239         char cmdbuf[SIZ];
 240         char *un;
 241         char *strptr1;
 242         int MyLastMsg, ThisLastMsg;
 243         struct ChatLine *clptr;
 244         struct CitContext *t_context;
 245         int retval;
 246
 247         if (!(CC->logged_in)) {
 248                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 249                 return;
 250         }
 251
 252         CC->cs_flags = CC->cs_flags | CS_CHAT;
 253         cprintf("%d Entering chat mode (type '/help' for available commands)\n",
 254                 START_CHAT_MODE);
 255         unbuffer_output();
 256
 257         MyLastMsg = ChatLastMsg;
 258
 259         if ((CC->cs_flags & CS_STEALTH) == 0) {
 260                 allwrite("<entering chat>", 0, NULL);
 261         }
 262         strcpy(cmdbuf, "");
 263
 264         do_chat_listing(2);
 265
 266         while (1) {
 267                 int ok_cmd;
 268                 int linelen;
 269
 270                 ok_cmd = 0;
 271                 linelen = strlen(cmdbuf);
 272                 if (linelen > 100) --linelen;   /* truncate too-long lines */
 273                 cmdbuf[linelen + 1] = 0;
 274
 275                 retval = client_read_to(&cmdbuf[linelen], 1, 2);
 276
 277                 if (retval < 0 || CC->kill_me) {        /* socket broken? */
 278                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 279                                 allwrite("<disconnected>", 0, NULL);
 280                         }
 281                         return;
 282                 }
 283
 284                 /* if we have a complete line, do send processing */
 285                 if (!IsEmptyStr(cmdbuf))
 286                         if (cmdbuf[strlen(cmdbuf) - 1] == 10) {
 287                                 cmdbuf[strlen(cmdbuf) - 1] = 0;
 288                                 time(&CC->lastcmd);
 289                                 time(&CC->lastidle);
 290
 291                                 if ((!strcasecmp(cmdbuf, "exit"))
 292                                     || (!strcasecmp(cmdbuf, "/exit"))
 293                                     || (!strcasecmp(cmdbuf, "quit"))
 294                                     || (!strcasecmp(cmdbuf, "logout"))
 295                                     || (!strcasecmp(cmdbuf, "logoff"))
 296                                     || (!strcasecmp(cmdbuf, "/q"))
 297                                     || (!strcasecmp(cmdbuf, ".q"))
 298                                     || (!strcasecmp(cmdbuf, "/quit"))
 299                                     )
 300                                         strcpy(cmdbuf, "000");
 301
 302                                 if (!strcmp(cmdbuf, "000")) {
 303                                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 304                                                 allwrite("<exiting chat>", 0, NULL);
 305                                         }
 306                                         sleep(1);
 307                                         cprintf("000\n");
 308                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 309                                         return;
 310                                 }
 311                                 if ((!strcasecmp(cmdbuf, "/help"))
 312                                     || (!strcasecmp(cmdbuf, "help"))
 313                                     || (!strcasecmp(cmdbuf, "/?"))
 314                                     || (!strcasecmp(cmdbuf, "?"))) {
 315                                         cprintf(":|\n");
 316                                         cprintf(":|Available commands: \n");
 317                                         cprintf(":|/help   (prints this message) \n");
 318                                         cprintf(":|/who    (list users currently in chat) \n");
 319                                         cprintf(":|/whobbs (list users in chat -and- elsewhere) \n");
 320                                         cprintf(":|/me     ('action' line, ala irc) \n");
 321                                         cprintf(":|/msg    (send private message, ala irc) \n");
 322                                         if (is_room_aide()) {
 323                                                 cprintf(":|/kick   (kick another user out of this room) \n");
 324                                         }
 325                                         cprintf(":|/quit   (exit from this chat) \n");
 326                                         cprintf(":|\n");
 327                                         ok_cmd = 1;
 328                                 }
 329                                 if (!strcasecmp(cmdbuf, "/who")) {
 330                                         do_chat_listing(0);
 331                                         ok_cmd = 1;
 332                                 }
 333                                 if (!strcasecmp(cmdbuf, "/whobbs")) {
 334                                         do_chat_listing(1);
 335                                         ok_cmd = 1;
 336                                 }
 337                                 if (!strncasecmp(cmdbuf, "/me ", 4)) {
 338                                         allwrite(&cmdbuf[4], 1, NULL);
 339                                         ok_cmd = 1;
 340                                 }
 341                                 if (!strncasecmp(cmdbuf, "/msg ", 5)) {
 342                                         ok_cmd = 1;
 343                                         strptr1 = &cmdbuf[5];
 344                                         if ((t_context = find_context(&strptr1))) {
 345                                                 allwrite(strptr1, 2, CC->curr_user);
 346                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 347                                                         allwrite(strptr1, 2, t_context->curr_user);
 348                                         } else
 349                                                 cprintf(":|User not found.\n");
 350                                         cprintf("\n");
 351                                 }
 352                                 /* The /kick function is implemented by sending a specific
 353                                  * message to the kicked-out user's context.  When that message
 354                                  * is processed by the read loop, that context will exit.
 355                                  */
 356                                 if ( (!strncasecmp(cmdbuf, "/kick ", 6)) && (is_room_aide()) ) {
 357                                         ok_cmd = 1;
 358                                         strptr1 = &cmdbuf[6];
 359                                         strcat(strptr1, " ");
 360                                         if ((t_context = find_context(&strptr1))) {
 361                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 362                                                         allwrite(strptr1, 3, t_context->curr_user);
 363                                         } else
 364                                                 cprintf(":|User not found.\n");
 365                                         cprintf("\n");
 366                                 }
 367                                 if ((cmdbuf[0] != '/') && (strlen(cmdbuf) > 0)) {
 368                                         ok_cmd = 1;
 369                                         allwrite(cmdbuf, 0, NULL);
 370                                 }
 371                                 if ((!ok_cmd) && (cmdbuf[0]) && (cmdbuf[0] != '\n'))
 372                                         cprintf(":|Command %s is not understood.\n", cmdbuf);
 373
 374                                 strcpy(cmdbuf, "");
 375
 376                         }
 377                 /* now check the queue for new incoming stuff */
 378
 379                 if (CC->fake_username[0])
 380                         un = CC->fake_username;
 381                 else
 382                         un = CC->curr_user;
 383                 if (ChatLastMsg > MyLastMsg) {
 384                         ThisLastMsg = ChatLastMsg;
 385                         for (clptr = ChatQueue; clptr != NULL; clptr = clptr->next) {
 386                                 if ((clptr->chat_seq > MyLastMsg) && ((!clptr->chat_username[0]) || (!strncasecmp(un, clptr->chat_username, 32)))) {
 387                                         if ((!clptr->chat_room[0]) || (!strncasecmp(CC->room.QRname, clptr->chat_room, ROOMNAMELEN))) {
 388                                                 /* Output new chat data */
 389                                                 cprintf("%s\n", clptr->chat_text);
 390
 391                                                 /* See if we've been force-quitted (kicked etc.) */
 392                                                 if (!strcmp(&clptr->chat_text[2], KICKEDMSG)) {
 393                                                         allwrite("<kicked out of this room>", 0, NULL);
 394                                                         cprintf("000\n");
 395                                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 396
 397                                                         /* Kick user out of room */
 398                                                         CtdlInvtKick(CC->user.fullname, 0);
 399
 400                                                         /* And return to the Lobby */
 401                                                         usergoto(config.c_baseroom, 0, 0, NULL, NULL);
 402                                                         return;
 403                                                 }
 404                                         }
 405                                 }
 406                         }
 407                         MyLastMsg = ThisLastMsg;
 408                 }
 409         }
 410 }
 411
 412
 413
 414 /*
 415  * Delete any remaining instant messages
 416  */
 417 void delete_instant_messages(void) {
 418         struct ExpressMessage *ptr;
 419
 420         begin_critical_section(S_SESSION_TABLE);
 421         while (CC->FirstExpressMessage != NULL) {
 422                 ptr = CC->FirstExpressMessage->next;
 423                 if (CC->FirstExpressMessage->text != NULL)
 424                         free(CC->FirstExpressMessage->text);
 425                 free(CC->FirstExpressMessage);
 426                 CC->FirstExpressMessage = ptr;
 427         }
 428         end_critical_section(S_SESSION_TABLE);
 429 }
 430
 431
 432
 433
 434 /*
 435  * Poll for instant messages (OLD METHOD -- ***DEPRECATED ***)
 436  */
 437 void cmd_pexp(char *argbuf)
 438 {
 439         struct ExpressMessage *ptr, *holdptr;
 440
 441         if (CC->FirstExpressMessage == NULL) {
 442                 cprintf("%d No instant messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
 443                 return;
 444         }
 445         begin_critical_section(S_SESSION_TABLE);
 446         ptr = CC->FirstExpressMessage;
 447         CC->FirstExpressMessage = NULL;
 448         end_critical_section(S_SESSION_TABLE);
 449
 450         cprintf("%d Express msgs:\n", LISTING_FOLLOWS);
 451         while (ptr != NULL) {
 452                 if (ptr->flags && EM_BROADCAST)
 453                         cprintf("Broadcast message ");
 454                 else if (ptr->flags && EM_CHAT)
 455                         cprintf("Chat request ");
 456                 else if (ptr->flags && EM_GO_AWAY)
 457                         cprintf("Please logoff now, as requested ");
 458                 else
 459                         cprintf("Message ");
 460                 cprintf("from %s:\n", ptr->sender);
 461                 if (ptr->text != NULL)
 462                         memfmout(ptr->text, 0, "\n");
 463
 464                 holdptr = ptr->next;
 465                 if (ptr->text != NULL) free(ptr->text);
 466                 free(ptr);
 467                 ptr = holdptr;
 468         }
 469         cprintf("000\n");
 470 }
 471
 472
 473 /*
 474  * Get instant messages (new method)
 475  */
 476 void cmd_gexp(char *argbuf) {
 477         struct ExpressMessage *ptr;
 478
 479         if (CC->FirstExpressMessage == NULL) {
 480                 cprintf("%d No instant messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
 481                 return;
 482         }
 483
 484         begin_critical_section(S_SESSION_TABLE);
 485         ptr = CC->FirstExpressMessage;
 486         CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 487         end_critical_section(S_SESSION_TABLE);
 488
 489         cprintf("%d %d|%ld|%d|%s|%s|%s\n",
 490                 LISTING_FOLLOWS,
 491                 ((ptr->next != NULL) ? 1 : 0),          /* more msgs? */
 492                 (long)ptr->timestamp,                   /* time sent */
 493                 ptr->flags,                             /* flags */
 494                 ptr->sender,                            /* sender of msg */
 495                 config.c_nodename,                      /* static for now (and possibly deprecated) */
 496                 ptr->sender_email                       /* email or jid of sender */
 497         );
 498
 499         if (ptr->text != NULL) {
 500                 memfmout(ptr->text, 0, "\n");
 501                 if (ptr->text[strlen(ptr->text)-1] != '\n') cprintf("\n");
 502                 free(ptr->text);
 503         }
 504
 505         cprintf("000\n");
 506         free(ptr);
 507 }
 508
 509 /*
 510  * Asynchronously deliver instant messages
 511  */
 512 void cmd_gexp_async(void) {
 513
 514         /* Only do this if the session can handle asynchronous protocol */
 515         if (CC->is_async == 0) return;
 516
 517         /* And don't do it if there's nothing to send. */
 518         if (CC->FirstExpressMessage == NULL) return;
 519
 520         cprintf("%d instant msg\n", ASYNC_MSG + ASYNC_GEXP);
 521 }
 522
 523 /*
 524  * Back end support function for send_instant_message() and company
 525  */
 526 void add_xmsg_to_context(struct CitContext *ccptr,
 527                         struct ExpressMessage *newmsg)
 528 {
 529         struct ExpressMessage *findend;
 530
 531         if (ccptr->FirstExpressMessage == NULL) {
 532                 ccptr->FirstExpressMessage = newmsg;
 533         }
 534         else {
 535                 findend = ccptr->FirstExpressMessage;
 536                 while (findend->next != NULL) {
 537                         findend = findend->next;
 538                 }
 539                 findend->next = newmsg;
 540         }
 541
 542         /* If the target context is a session which can handle asynchronous
 543          * messages, go ahead and set the flag for that.
 544          */
 545         if (ccptr->is_async) {
 546                 ccptr->async_waiting = 1;
 547                 if (ccptr->state == CON_IDLE) {
 548                         ccptr->state = CON_READY;
 549                 }
 550         }
 551 }
 552
 553
 554
 555
 556 /*
 557  * This is the back end to the instant message sending function.
 558  * Returns the number of users to which the message was sent.
 559  * Sending a zero-length message tests for recipients without sending messages.
 560  */
 561 int send_instant_message(char *lun, char *lem, char *x_user, char *x_msg)
 562 {
 563         int message_sent = 0;           /* number of successful sends */
 564         struct CitContext *ccptr;
 565         struct ExpressMessage *newmsg;
 566         char *un;
 567         size_t msglen = 0;
 568         int do_send = 0;                /* set to 1 to actually page, not
 569                                          * just check to see if we can.
 570                                          */
 571         struct savelist *sl = NULL;     /* list of rooms to save this page */
 572         struct savelist *sptr;
 573         struct CtdlMessage *logmsg = NULL;
 574         long msgnum;
 575
 576         if (strlen(x_msg) > 0) {
 577                 msglen = strlen(x_msg) + 4;
 578                 do_send = 1;
 579         }
 580
 581         /* find the target user's context and append the message */
 582         begin_critical_section(S_SESSION_TABLE);
 583         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 584
 585                 if (ccptr->fake_username[0]) {
 586                         un = ccptr->fake_username;
 587                 }
 588                 else {
 589                         un = ccptr->user.fullname;
 590                 }
 591
 592                 if ( ((!strcasecmp(un, x_user))
 593                     || (!strcasecmp(x_user, "broadcast")))
 594                     && ((ccptr->disable_exp == 0)
 595                     || (CC->user.axlevel >= 6)) ) {
 596                         if (do_send) {
 597                                 newmsg = (struct ExpressMessage *)
 598                                         malloc(sizeof (struct ExpressMessage));
 599                                 memset(newmsg, 0,
 600                                         sizeof (struct ExpressMessage));
 601                                 time(&(newmsg->timestamp));
 602                                 safestrncpy(newmsg->sender, lun, sizeof newmsg->sender);
 603                                 safestrncpy(newmsg->sender_email, lem, sizeof newmsg->sender_email);
 604                                 if (!strcasecmp(x_user, "broadcast")) {
 605                                         newmsg->flags |= EM_BROADCAST;
 606                                 }
 607                                 newmsg->text = strdup(x_msg);
 608
 609                                 add_xmsg_to_context(ccptr, newmsg);
 610
 611                                 /* and log it ... */
 612                                 if (ccptr != CC) {
 613                                         sptr = (struct savelist *)
 614                                                 malloc(sizeof(struct savelist));
 615                                         sptr->next = sl;
 616                                         MailboxName(sptr->roomname,
 617                                                     sizeof sptr->roomname,
 618                                                 &ccptr->user, PAGELOGROOM);
 619                                         sl = sptr;
 620                                 }
 621                         }
 622                         ++message_sent;
 623                 }
 624         }
 625         end_critical_section(S_SESSION_TABLE);
 626
 627         /* Log the page to disk if configured to do so  */
 628         if ( (do_send) && (message_sent) ) {
 629
 630                 logmsg = malloc(sizeof(struct CtdlMessage));
 631                 memset(logmsg, 0, sizeof(struct CtdlMessage));
 632                 logmsg->cm_magic = CTDLMESSAGE_MAGIC;
 633                 logmsg->cm_anon_type = MES_NORMAL;
 634                 logmsg->cm_format_type = 0;
 635                 logmsg->cm_fields['A'] = strdup(lun);
 636                 logmsg->cm_fields['F'] = strdup(lem);
 637                 logmsg->cm_fields['N'] = strdup(NODENAME);
 638                 logmsg->cm_fields['O'] = strdup(PAGELOGROOM);
 639                 logmsg->cm_fields['R'] = strdup(x_user);
 640                 logmsg->cm_fields['M'] = strdup(x_msg);
 641
 642
 643                 /* Save a copy of the message in the sender's log room,
 644                  * creating the room if necessary.
 645                  */
 646                 create_room(PAGELOGROOM, 4, "", 0, 1, 0, VIEW_BBS);
 647                 msgnum = CtdlSubmitMsg(logmsg, NULL, PAGELOGROOM, 0);
 648
 649                 /* Now save a copy in the global log room, if configured */
 650                 if (!IsEmptyStr(config.c_logpages)) {
 651                         create_room(config.c_logpages, 3, "", 0, 1, 1, VIEW_BBS);
 652                         CtdlSaveMsgPointerInRoom(config.c_logpages, msgnum, 0, NULL);
 653                 }
 654
 655                 /* Save a copy in each recipient's log room, creating those
 656                  * rooms if necessary.  Note that we create as a type 5 room
 657                  * rather than 4, which indicates that it's a personal room
 658                  * but we've already supplied the namespace prefix.
 659                  */
 660                 while (sl != NULL) {
 661                         create_room(sl->roomname, 5, "", 0, 1, 1, VIEW_BBS);
 662                         CtdlSaveMsgPointerInRoom(sl->roomname, msgnum, 0, NULL);
 663                         sptr = sl->next;
 664                         free(sl);
 665                         sl = sptr;
 666                 }
 667
 668                 CtdlFreeMessage(logmsg);
 669         }
 670
 671         return (message_sent);
 672 }
 673
 674 /*
 675  * send instant messages
 676  */
 677 void cmd_sexp(char *argbuf)
 678 {
 679         int message_sent = 0;
 680         char x_user[USERNAME_SIZE];
 681         char x_msg[1024];
 682         char *lun;
 683         char *lem;
 684         char *x_big_msgbuf = NULL;
 685
 686         if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
 687                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 688                 return;
 689         }
 690         if (CC->fake_username[0])
 691                 lun = CC->fake_username;
 692         else
 693                 lun = CC->user.fullname;
 694
 695         lem = CC->cs_inet_email;
 696
 697         extract_token(x_user, argbuf, 0, '|', sizeof x_user);
 698         extract_token(x_msg, argbuf, 1, '|', sizeof x_msg);
 699
 700         if (!x_user[0]) {
 701                 cprintf("%d You were not previously paged.\n", ERROR + NO_SUCH_USER);
 702                 return;
 703         }
 704         if ((!strcasecmp(x_user, "broadcast")) && (CC->user.axlevel < 6)) {
 705                 cprintf("%d Higher access required to send a broadcast.\n",
 706                         ERROR + HIGHER_ACCESS_REQUIRED);
 707                 return;
 708         }
 709         /* This loop handles text-transfer pages */
 710         if (!strcmp(x_msg, "-")) {
 711                 message_sent = PerformXmsgHooks(lun, lem, x_user, "");
 712                 if (message_sent == 0) {
 713                         if (getuser(NULL, x_user))
 714                                 cprintf("%d '%s' does not exist.\n",
 715                                                 ERROR + NO_SUCH_USER, x_user);
 716                         else
 717                                 cprintf("%d '%s' is not logged in "
 718                                                 "or is not accepting pages.\n",
 719                                                 ERROR + RESOURCE_NOT_OPEN, x_user);
 720                         return;
 721                 }
 722                 unbuffer_output();
 723                 cprintf("%d Transmit message (will deliver to %d users)\n",
 724                         SEND_LISTING, message_sent);
 725                 x_big_msgbuf = malloc(SIZ);
 726                 memset(x_big_msgbuf, 0, SIZ);
 727                 while (client_getln(x_msg, sizeof x_msg) >= 0 && strcmp(x_msg, "000")) {
 728                         x_big_msgbuf = realloc(x_big_msgbuf,
 729                                strlen(x_big_msgbuf) + strlen(x_msg) + 4);
 730                         if (!IsEmptyStr(x_big_msgbuf))
 731                            if (x_big_msgbuf[strlen(x_big_msgbuf)] != '\n')
 732                                 strcat(x_big_msgbuf, "\n");
 733                         strcat(x_big_msgbuf, x_msg);
 734                 }
 735                 PerformXmsgHooks(lun, lem, x_user, x_big_msgbuf);
 736                 free(x_big_msgbuf);
 737
 738                 /* This loop handles inline pages */
 739         } else {
 740                 message_sent = PerformXmsgHooks(lun, lem, x_user, x_msg);
 741
 742                 if (message_sent > 0) {
 743                         if (!IsEmptyStr(x_msg))
 744                                 cprintf("%d Message sent", CIT_OK);
 745                         else
 746                                 cprintf("%d Ok to send message", CIT_OK);
 747                         if (message_sent > 1)
 748                                 cprintf(" to %d users", message_sent);
 749                         cprintf(".\n");
 750                 } else {
 751                         if (getuser(NULL, x_user))
 752                                 cprintf("%d '%s' does not exist.\n",
 753                                                 ERROR + NO_SUCH_USER, x_user);
 754                         else
 755                                 cprintf("%d '%s' is not logged in "
 756                                                 "or is not accepting pages.\n",
 757                                                 ERROR + RESOURCE_NOT_OPEN, x_user);
 758                 }
 759
 760
 761         }
 762 }
 763
 764
 765
 766 /*
 767  * Enter or exit paging-disabled mode
 768  */
 769 void cmd_dexp(char *argbuf)
 770 {
 771         int new_state;
 772
 773         if (CtdlAccessCheck(ac_logged_in)) return;
 774
 775         new_state = extract_int(argbuf, 0);
 776         if ((new_state == 0) || (new_state == 1)) {
 777                 CC->disable_exp = new_state;
 778         }
 779
 780         cprintf("%d %d\n", CIT_OK, CC->disable_exp);
 781 }
 782
 783
 784 /*
 785  * Request client termination
 786  */
 787 void cmd_reqt(char *argbuf) {
 788         struct CitContext *ccptr;
 789         int sessions = 0;
 790         int which_session;
 791         struct ExpressMessage *newmsg;
 792
 793         if (CtdlAccessCheck(ac_aide)) return;
 794         which_session = extract_int(argbuf, 0);
 795
 796         begin_critical_section(S_SESSION_TABLE);
 797         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 798                 if ((ccptr->cs_pid == which_session) || (which_session == 0)) {
 799
 800                         newmsg = (struct ExpressMessage *)
 801                                 malloc(sizeof (struct ExpressMessage));
 802                         memset(newmsg, 0,
 803                                 sizeof (struct ExpressMessage));
 804                         time(&(newmsg->timestamp));
 805                         safestrncpy(newmsg->sender, CC->user.fullname,
 806                                     sizeof newmsg->sender);
 807                         newmsg->flags |= EM_GO_AWAY;
 808                         newmsg->text = strdup("Automatic logoff requested.");
 809
 810                         add_xmsg_to_context(ccptr, newmsg);
 811                         ++sessions;
 812
 813                 }
 814         }
 815         end_critical_section(S_SESSION_TABLE);
 816         cprintf("%d Sent termination request to %d sessions.\n", CIT_OK, sessions);
 817 }
 818
 819
 820
 821 CTDL_MODULE_INIT(chat)
 822 {
 823         if (!threading)
 824         {
 825                 CtdlRegisterProtoHook(cmd_chat, "CHAT", "Begin real-time chat");
 826                 CtdlRegisterProtoHook(cmd_pexp, "PEXP", "Poll for instant messages");
 827                 CtdlRegisterProtoHook(cmd_gexp, "GEXP", "Get instant messages");
 828                 CtdlRegisterProtoHook(cmd_sexp, "SEXP", "Send an instant message");
 829                 CtdlRegisterProtoHook(cmd_dexp, "DEXP", "Disable instant messages");
 830                 CtdlRegisterProtoHook(cmd_reqt, "REQT", "Request client termination");
 831                 CtdlRegisterSessionHook(cmd_gexp_async, EVT_ASYNC);
 832                 CtdlRegisterSessionHook(delete_instant_messages, EVT_STOP);
 833                 CtdlRegisterXmsgHook(send_instant_message, XMSG_PRI_LOCAL);
 834         }
 835
 836         /* return our Subversion id for the Log */
 837         return "$Id$";
 838 }
 839