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