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