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