citadel/serv_chat.c

   1 /*
   2  * $Id$
   3  *
   4  * This module handles all "real time" communication between users.  The
   5  * modes of communication currently supported are Chat and Paging.
   6  *
   7  */
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <pwd.h>
  15 #include <errno.h>
  16 #include <sys/types.h>
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #include <sys/wait.h>
  30 #include <string.h>
  31 #include <limits.h>
  32 #include "citadel.h"
  33 #include "server.h"
  34 #include "serv_extensions.h"
  35 #include "serv_chat.h"
  36 #include "sysdep_decls.h"
  37 #include "citserver.h"
  38 #include "support.h"
  39 #include "config.h"
  40 #include "tools.h"
  41 #include "msgbase.h"
  42 #include "user_ops.h"
  43 #include "room_ops.h"
  44
  45 #ifndef HAVE_SNPRINTF
  46 #include "snprintf.h"
  47 #endif
  48
  49 struct ChatLine *ChatQueue = NULL;
  50 int ChatLastMsg = 0;
  51
  52 /*
  53  * This message can be set to anything you want, but it is
  54  * checked for consistency so don't move it away from here.
  55  */
  56 #define KICKEDMSG "You have been kicked out of this room."
  57
  58 void allwrite(char *cmdbuf, int flag, char *username)
  59 {
  60         FILE *fp;
  61         char bcast[SIZ];
  62         char *un;
  63         struct ChatLine *clptr, *clnew;
  64         time_t now;
  65
  66         if (CC->fake_username[0])
  67                 un = CC->fake_username;
  68         else
  69                 un = CC->user.fullname;
  70         if (flag == 1) {
  71                 snprintf(bcast, sizeof bcast, ":|<%s %s>", un, cmdbuf);
  72         } else if (flag == 0) {
  73                 snprintf(bcast, sizeof bcast, "%s|%s", un, cmdbuf);
  74         } else if (flag == 2) {
  75                 snprintf(bcast, sizeof bcast, ":|<%s whispers %s>", un, cmdbuf);
  76         } else if (flag == 3) {
  77                 snprintf(bcast, sizeof bcast, ":|%s", KICKEDMSG);
  78         }
  79         if ((strcasecmp(cmdbuf, "NOOP")) && (flag != 2)) {
  80                 fp = fopen(CHATLOG, "a");
  81                 if (fp != NULL)
  82                         fprintf(fp, "%s\n", bcast);
  83                 fclose(fp);
  84         }
  85         clnew = (struct ChatLine *) malloc(sizeof(struct ChatLine));
  86         memset(clnew, 0, sizeof(struct ChatLine));
  87         if (clnew == NULL) {
  88                 fprintf(stderr, "citserver: cannot alloc chat line: %s\n",
  89                         strerror(errno));
  90                 return;
  91         }
  92         time(&now);
  93         clnew->next = NULL;
  94         clnew->chat_time = now;
  95         safestrncpy(clnew->chat_room, CC->room.QRname,
  96                         sizeof clnew->chat_room);
  97         clnew->chat_room[sizeof clnew->chat_room - 1] = 0;
  98         if (username) {
  99                 safestrncpy(clnew->chat_username, username,
 100                         sizeof clnew->chat_username);
 101                 clnew->chat_username[sizeof clnew->chat_username - 1] = 0;
 102         } else
 103                 clnew->chat_username[0] = '\0';
 104         safestrncpy(clnew->chat_text, bcast, sizeof clnew->chat_text);
 105
 106         /* Here's the critical section.
 107          * First, add the new message to the queue...
 108          */
 109         begin_critical_section(S_CHATQUEUE);
 110         ++ChatLastMsg;
 111         clnew->chat_seq = ChatLastMsg;
 112         if (ChatQueue == NULL) {
 113                 ChatQueue = clnew;
 114         } else {
 115                 for (clptr = ChatQueue; clptr->next != NULL; clptr = clptr->next);;
 116                 clptr->next = clnew;
 117         }
 118
 119         /* Then, before releasing the lock, free the expired messages */
 120         while ((ChatQueue != NULL) && (now - ChatQueue->chat_time >= 120L)) {
 121                 clptr = ChatQueue;
 122                 ChatQueue = ChatQueue->next;
 123                 free(clptr);
 124         }
 125         end_critical_section(S_CHATQUEUE);
 126 }
 127
 128
 129 t_context *find_context(char **unstr)
 130 {
 131         t_context *t_cc, *found_cc = NULL;
 132         char *name, *tptr;
 133
 134         if ((!*unstr) || (!unstr))
 135                 return (NULL);
 136
 137         begin_critical_section(S_SESSION_TABLE);
 138         for (t_cc = ContextList; ((t_cc) && (!found_cc)); t_cc = t_cc->next) {
 139                 if (t_cc->fake_username[0])
 140                         name = t_cc->fake_username;
 141                 else
 142                         name = t_cc->curr_user;
 143                 tptr = *unstr;
 144                 if ((!strncasecmp(name, tptr, strlen(name))) && (tptr[strlen(name)] == ' ')) {
 145                         found_cc = t_cc;
 146                         *unstr = &(tptr[strlen(name) + 1]);
 147                 }
 148         }
 149         end_critical_section(S_SESSION_TABLE);
 150
 151         return (found_cc);
 152 }
 153
 154 /*
 155  * List users in chat.
 156  * allflag ==   0 = list users in chat
 157  *              1 = list users in chat, followed by users not in chat
 158  *              2 = display count only
 159  */
 160
 161 void do_chat_listing(int allflag)
 162 {
 163         struct CitContext *ccptr;
 164         int count = 0;
 165         int count_elsewhere = 0;
 166         char roomname[ROOMNAMELEN];
 167
 168         if ((allflag == 0) || (allflag == 1))
 169                 cprintf(":|\n:| Users currently in chat:\n");
 170         begin_critical_section(S_SESSION_TABLE);
 171         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 172                 if (ccptr->cs_flags & CS_CHAT) {
 173                         if (!strcasecmp(ccptr->room.QRname,
 174                            CC->room.QRname)) {
 175                                 ++count;
 176                         }
 177                         else {
 178                                 ++count_elsewhere;
 179                         }
 180                 }
 181
 182                 GenerateRoomDisplay(roomname, ccptr, CC);
 183                 if ((CC->user.axlevel < 6)
 184                    && (strlen(ccptr->fake_roomname)>0)) {
 185                         strcpy(roomname, ccptr->fake_roomname);
 186                 }
 187
 188                 if ((ccptr->cs_flags & CS_CHAT)
 189                     && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 190                         if ((allflag == 0) || (allflag == 1)) {
 191                                 cprintf(":| %-25s <%s>:\n",
 192                                         (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user,
 193                                         roomname);
 194                         }
 195                 }
 196         }
 197
 198         if (allflag == 1) {
 199                 cprintf(":|\n:| Users not in chat:\n");
 200                 for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 201
 202                         GenerateRoomDisplay(roomname, ccptr, CC);
 203                         if ((CC->user.axlevel < 6)
 204                         && (strlen(ccptr->fake_roomname)>0)) {
 205                                 strcpy(roomname, ccptr->fake_roomname);
 206                         }
 207
 208                         if (((ccptr->cs_flags & CS_CHAT) == 0)
 209                             && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 210                                 cprintf(":| %-25s <%s>:\n",
 211                                         (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user,
 212                                         roomname);
 213                         }
 214                 }
 215         }
 216         end_critical_section(S_SESSION_TABLE);
 217
 218         if (allflag == 2) {
 219                 if (count > 1) {
 220                         cprintf(":|There are %d users here.\n", count);
 221                 }
 222                 else {
 223                         cprintf(":|Note: you are the only one here.\n");
 224                 }
 225                 if (count_elsewhere > 0) {
 226                         cprintf(":|There are %d users chatting in other rooms.\n", count_elsewhere);
 227                 }
 228         }
 229
 230         cprintf(":|\n");
 231 }
 232
 233
 234 void cmd_chat(char *argbuf)
 235 {
 236         char cmdbuf[SIZ];
 237         char *un;
 238         char *strptr1;
 239         int MyLastMsg, ThisLastMsg;
 240         struct ChatLine *clptr;
 241         struct CitContext *t_context;
 242         int retval;
 243
 244         if (!(CC->logged_in)) {
 245                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 246                 return;
 247         }
 248
 249         CC->cs_flags = CC->cs_flags | CS_CHAT;
 250         cprintf("%d Entering chat mode (type '/help' for available commands)\n",
 251                 START_CHAT_MODE);
 252
 253         MyLastMsg = ChatLastMsg;
 254
 255         if ((CC->cs_flags & CS_STEALTH) == 0) {
 256                 allwrite("<entering chat>", 0, NULL);
 257         }
 258         strcpy(cmdbuf, "");
 259
 260         do_chat_listing(2);
 261
 262         while (1) {
 263                 int ok_cmd;
 264                 int linelen;
 265
 266                 ok_cmd = 0;
 267                 linelen = strlen(cmdbuf);
 268                 if (linelen > 100) --linelen;   /* truncate too-long lines */
 269                 cmdbuf[linelen + 1] = 0;
 270
 271                 retval = client_read_to(&cmdbuf[linelen], 1, 2);
 272
 273                 if (retval < 0 || CC->kill_me) {        /* socket broken? */
 274                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 275                                 allwrite("<disconnected>", 0, NULL);
 276                         }
 277                         return;
 278                 }
 279
 280                 /* if we have a complete line, do send processing */
 281                 if (strlen(cmdbuf) > 0)
 282                         if (cmdbuf[strlen(cmdbuf) - 1] == 10) {
 283                                 cmdbuf[strlen(cmdbuf) - 1] = 0;
 284                                 time(&CC->lastcmd);
 285                                 time(&CC->lastidle);
 286
 287                                 if ((!strcasecmp(cmdbuf, "exit"))
 288                                     || (!strcasecmp(cmdbuf, "/exit"))
 289                                     || (!strcasecmp(cmdbuf, "quit"))
 290                                     || (!strcasecmp(cmdbuf, "logout"))
 291                                     || (!strcasecmp(cmdbuf, "logoff"))
 292                                     || (!strcasecmp(cmdbuf, "/q"))
 293                                     || (!strcasecmp(cmdbuf, ".q"))
 294                                     || (!strcasecmp(cmdbuf, "/quit"))
 295                                     )
 296                                         strcpy(cmdbuf, "000");
 297
 298                                 if (!strcmp(cmdbuf, "000")) {
 299                                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 300                                                 allwrite("<exiting chat>", 0, NULL);
 301                                         }
 302                                         sleep(1);
 303                                         cprintf("000\n");
 304                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 305                                         return;
 306                                 }
 307                                 if ((!strcasecmp(cmdbuf, "/help"))
 308                                     || (!strcasecmp(cmdbuf, "help"))
 309                                     || (!strcasecmp(cmdbuf, "/?"))
 310                                     || (!strcasecmp(cmdbuf, "?"))) {
 311                                         cprintf(":|\n");
 312                                         cprintf(":|Available commands: \n");
 313                                         cprintf(":|/help   (prints this message) \n");
 314                                         cprintf(":|/who    (list users currently in chat) \n");
 315                                         cprintf(":|/whobbs (list users in chat -and- elsewhere) \n");
 316                                         cprintf(":|/me     ('action' line, ala irc) \n");
 317                                         cprintf(":|/msg    (send private message, ala irc) \n");
 318                                         if (is_room_aide()) {
 319                                                 cprintf(":|/kick   (kick another user out of this room) \n");
 320                                         }
 321                                         cprintf(":|/quit   (return to the BBS) \n");
 322                                         cprintf(":|\n");
 323                                         ok_cmd = 1;
 324                                 }
 325                                 if (!strcasecmp(cmdbuf, "/who")) {
 326                                         do_chat_listing(0);
 327                                         ok_cmd = 1;
 328                                 }
 329                                 if (!strcasecmp(cmdbuf, "/whobbs")) {
 330                                         do_chat_listing(1);
 331                                         ok_cmd = 1;
 332                                 }
 333                                 if (!strncasecmp(cmdbuf, "/me ", 4)) {
 334                                         allwrite(&cmdbuf[4], 1, NULL);
 335                                         ok_cmd = 1;
 336                                 }
 337                                 if (!strncasecmp(cmdbuf, "/msg ", 5)) {
 338                                         ok_cmd = 1;
 339                                         strptr1 = &cmdbuf[5];
 340                                         if ((t_context = find_context(&strptr1))) {
 341                                                 allwrite(strptr1, 2, CC->curr_user);
 342                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 343                                                         allwrite(strptr1, 2, t_context->curr_user);
 344                                         } else
 345                                                 cprintf(":|User not found.\n");
 346                                         cprintf("\n");
 347                                 }
 348                                 /* The /kick function is implemented by sending a specific
 349                                  * message to the kicked-out user's context.  When that message
 350                                  * is processed by the read loop, that context will exit.
 351                                  */
 352                                 if ( (!strncasecmp(cmdbuf, "/kick ", 6)) && (is_room_aide()) ) {
 353                                         ok_cmd = 1;
 354                                         strptr1 = &cmdbuf[6];
 355                                         strcat(strptr1, " ");
 356                                         if ((t_context = find_context(&strptr1))) {
 357                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 358                                                         allwrite(strptr1, 3, t_context->curr_user);
 359                                         } else
 360                                                 cprintf(":|User not found.\n");
 361                                         cprintf("\n");
 362                                 }
 363                                 if ((cmdbuf[0] != '/') && (strlen(cmdbuf) > 0)) {
 364                                         ok_cmd = 1;
 365                                         allwrite(cmdbuf, 0, NULL);
 366                                 }
 367                                 if ((!ok_cmd) && (cmdbuf[0]) && (cmdbuf[0] != '\n'))
 368                                         cprintf(":|Command %s is not understood.\n", cmdbuf);
 369
 370                                 strcpy(cmdbuf, "");
 371
 372                         }
 373                 /* now check the queue for new incoming stuff */
 374
 375                 if (CC->fake_username[0])
 376                         un = CC->fake_username;
 377                 else
 378                         un = CC->curr_user;
 379                 if (ChatLastMsg > MyLastMsg) {
 380                         ThisLastMsg = ChatLastMsg;
 381                         for (clptr = ChatQueue; clptr != NULL; clptr = clptr->next) {
 382                                 if ((clptr->chat_seq > MyLastMsg) && ((!clptr->chat_username[0]) || (!strncasecmp(un, clptr->chat_username, 32)))) {
 383                                         if ((!clptr->chat_room[0]) || (!strncasecmp(CC->room.QRname, clptr->chat_room, ROOMNAMELEN))) {
 384                                                 /* Output new chat data */
 385                                                 cprintf("%s\n", clptr->chat_text);
 386
 387                                                 /* See if we've been force-quitted (kicked etc.) */
 388                                                 if (!strcmp(&clptr->chat_text[2], KICKEDMSG)) {
 389                                                         allwrite("<kicked out of this room>", 0, NULL);
 390                                                         cprintf("000\n");
 391                                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 392
 393                                                         /* Kick user out of room */
 394                                                         CtdlInvtKick(CC->user.fullname, 0);
 395
 396                                                         /* And return to the Lobby */
 397                                                         usergoto(config.c_baseroom, 0, 0, NULL, NULL);
 398                                                         return;
 399                                                 }
 400                                         }
 401                                 }
 402                         }
 403                         MyLastMsg = ThisLastMsg;
 404                 }
 405         }
 406 }
 407
 408
 409
 410 /*
 411  * Delete any remaining express messages
 412  */
 413 void delete_express_messages(void) {
 414         struct ExpressMessage *ptr;
 415
 416         begin_critical_section(S_SESSION_TABLE);
 417         while (CC->FirstExpressMessage != NULL) {
 418                 ptr = CC->FirstExpressMessage->next;
 419                 if (CC->FirstExpressMessage->text != NULL)
 420                         free(CC->FirstExpressMessage->text);
 421                 free(CC->FirstExpressMessage);
 422                 CC->FirstExpressMessage = ptr;
 423                 }
 424         end_critical_section(S_SESSION_TABLE);
 425         }
 426
 427
 428
 429
 430 /*
 431  * Poll for express messages (OLD METHOD -- ***DEPRECATED ***)
 432  */
 433 void cmd_pexp(char *argbuf)
 434 {
 435         struct ExpressMessage *ptr, *holdptr;
 436
 437         if (CC->FirstExpressMessage == NULL) {
 438                 cprintf("%d No express messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
 439                 return;
 440         }
 441         begin_critical_section(S_SESSION_TABLE);
 442         ptr = CC->FirstExpressMessage;
 443         CC->FirstExpressMessage = NULL;
 444         end_critical_section(S_SESSION_TABLE);
 445
 446         cprintf("%d Express msgs:\n", LISTING_FOLLOWS);
 447         while (ptr != NULL) {
 448                 if (ptr->flags && EM_BROADCAST)
 449                         cprintf("Broadcast message ");
 450                 else if (ptr->flags && EM_CHAT)
 451                         cprintf("Chat request ");
 452                 else if (ptr->flags && EM_GO_AWAY)
 453                         cprintf("Please logoff now, as requested ");
 454                 else
 455                         cprintf("Message ");
 456                 cprintf("from %s:\n", ptr->sender);
 457                 if (ptr->text != NULL)
 458                         memfmout(80, ptr->text, 0, "\n");
 459
 460                 holdptr = ptr->next;
 461                 if (ptr->text != NULL) free(ptr->text);
 462                 free(ptr);
 463                 ptr = holdptr;
 464         }
 465         cprintf("000\n");
 466 }
 467
 468
 469 /*
 470  * Get express messages (new method)
 471  */
 472 void cmd_gexp(char *argbuf) {
 473         struct ExpressMessage *ptr;
 474
 475         if (CC->FirstExpressMessage == NULL) {
 476                 cprintf("%d No express messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
 477                 return;
 478         }
 479
 480         begin_critical_section(S_SESSION_TABLE);
 481         ptr = CC->FirstExpressMessage;
 482         CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 483         end_critical_section(S_SESSION_TABLE);
 484
 485         cprintf("%d %d|%ld|%d|%s|%s\n",
 486                 LISTING_FOLLOWS,
 487                 ((ptr->next != NULL) ? 1 : 0),          /* more msgs? */
 488                 (long)ptr->timestamp,                           /* time sent */
 489                 ptr->flags,                             /* flags */
 490                 ptr->sender,                            /* sender of msg */
 491                 config.c_nodename);                     /* static for now */
 492         if (ptr->text != NULL) {
 493                 memfmout(80, ptr->text, 0, "\n");
 494                 if (ptr->text[strlen(ptr->text)-1] != '\n') cprintf("\n");
 495                 free(ptr->text);
 496                 }
 497         cprintf("000\n");
 498         free(ptr);
 499 }
 500
 501 /*
 502  * Asynchronously deliver express messages'
 503  */
 504 void cmd_gexp_async(void) {
 505
 506         /* Only do this if the session can handle asynchronous protocol */
 507         if (CC->is_async == 0) return;
 508
 509         /* And don't do it if there's nothing to send. */
 510         if (CC->FirstExpressMessage == NULL) return;
 511
 512         cprintf("%d express msg\n", ASYNC_MSG + ASYNC_GEXP);
 513         cmd_gexp("");
 514 }
 515
 516 /*
 517  * Back end support function for send_express_message() and company
 518  */
 519 void add_xmsg_to_context(struct CitContext *ccptr,
 520                         struct ExpressMessage *newmsg)
 521 {
 522         struct ExpressMessage *findend;
 523
 524         if (ccptr->FirstExpressMessage == NULL) {
 525                 ccptr->FirstExpressMessage = newmsg;
 526         }
 527         else {
 528                 findend = ccptr->FirstExpressMessage;
 529                 while (findend->next != NULL) {
 530                         findend = findend->next;
 531                 }
 532                 findend->next = newmsg;
 533         }
 534 }
 535
 536
 537
 538
 539 /*
 540  * This is the back end to the express message sending function.
 541  * Returns the number of users to which the message was sent.
 542  * Sending a zero-length message tests for recipients without sending messages.
 543  */
 544 int send_express_message(char *lun, char *x_user, char *x_msg)
 545 {
 546         int message_sent = 0;           /* number of successful sends */
 547
 548         struct CitContext *ccptr;
 549         struct ExpressMessage *newmsg;
 550         char *un;
 551         size_t msglen = 0;
 552         int do_send = 0;                /* set to 1 to actually page, not
 553                                          * just check to see if we can.
 554                                          */
 555         struct savelist *sl = NULL;     /* list of rooms to save this page */
 556         struct savelist *sptr;
 557         struct CtdlMessage *logmsg;
 558         long msgnum;
 559
 560         if (strlen(x_msg) > 0) {
 561                 msglen = strlen(x_msg) + 4;
 562                 do_send = 1;
 563                 }
 564
 565         /* find the target user's context and append the message */
 566         begin_critical_section(S_SESSION_TABLE);
 567         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 568
 569                 if (ccptr->fake_username[0])    /* <bc> */
 570                         un = ccptr->fake_username;
 571                 else
 572                         un = ccptr->user.fullname;
 573
 574                 if ( ((!strcasecmp(un, x_user))
 575                     || (!strcasecmp(x_user, "broadcast")))
 576                     && ((ccptr->disable_exp == 0)
 577                     || (CC->user.axlevel >= 6)) ) {
 578                         if (do_send) {
 579                                 newmsg = (struct ExpressMessage *)
 580                                         malloc(sizeof (struct ExpressMessage));
 581                                 memset(newmsg, 0,
 582                                         sizeof (struct ExpressMessage));
 583                                 time(&(newmsg->timestamp));
 584                                 safestrncpy(newmsg->sender, lun,
 585                                             sizeof newmsg->sender);
 586                                 if (!strcasecmp(x_user, "broadcast"))
 587                                         newmsg->flags |= EM_BROADCAST;
 588                                 newmsg->text = strdup(x_msg);
 589
 590                                 add_xmsg_to_context(ccptr, newmsg);
 591
 592                                 /* and log it ... */
 593                                 if (ccptr != CC) {
 594                                         sptr = (struct savelist *)
 595                                                 malloc(sizeof(struct savelist));
 596                                         sptr->next = sl;
 597                                         MailboxName(sptr->roomname,
 598                                                     sizeof sptr->roomname,
 599                                                 &ccptr->user, PAGELOGROOM);
 600                                         sl = sptr;
 601                                 }
 602                         }
 603                         ++message_sent;
 604                 }
 605         }
 606         end_critical_section(S_SESSION_TABLE);
 607
 608         /* Log the page to disk if configured to do so  */
 609         if ( (do_send) && (message_sent) ) {
 610
 611                 logmsg = malloc(sizeof(struct CtdlMessage));
 612                 memset(logmsg, 0, sizeof(struct CtdlMessage));
 613                 logmsg->cm_magic = CTDLMESSAGE_MAGIC;
 614                 logmsg->cm_anon_type = MES_NORMAL;
 615                 logmsg->cm_format_type = 0;
 616                 logmsg->cm_fields['A'] = strdup(lun);
 617                 logmsg->cm_fields['N'] = strdup(NODENAME);
 618                 logmsg->cm_fields['O'] = strdup(PAGELOGROOM);
 619                 logmsg->cm_fields['R'] = strdup(x_user);
 620                 logmsg->cm_fields['M'] = strdup(x_msg);
 621
 622
 623                 /* Save a copy of the message in the sender's log room,
 624                  * creating the room if necessary.
 625                  */
 626                 create_room(PAGELOGROOM, 4, "", 0, 1, 0);
 627                 msgnum = CtdlSubmitMsg(logmsg, NULL, PAGELOGROOM);
 628
 629                 /* Now save a copy in the global log room, if configured */
 630                 if (strlen(config.c_logpages) > 0) {
 631                         create_room(config.c_logpages, 3, "", 0, 1, 1);
 632                         CtdlSaveMsgPointerInRoom(config.c_logpages, msgnum, 0);
 633                 }
 634
 635                 /* Save a copy in each recipient's log room, creating those
 636                  * rooms if necessary.  Note that we create as a type 5 room
 637                  * rather than 4, which indicates that it's a personal room
 638                  * but we've already supplied the namespace prefix.
 639                  */
 640                 while (sl != NULL) {
 641                         create_room(sl->roomname, 5, "", 0, 1, 1);
 642                         CtdlSaveMsgPointerInRoom(sl->roomname, msgnum, 0);
 643                         sptr = sl->next;
 644                         free(sl);
 645                         sl = sptr;
 646                 }
 647
 648                 CtdlFreeMessage(logmsg);
 649         }
 650
 651         return (message_sent);
 652 }
 653
 654 /*
 655  * send express messages  <bc>
 656  */
 657 void cmd_sexp(char *argbuf)
 658 {
 659         int message_sent = 0;
 660         char x_user[SIZ];
 661         char x_msg[SIZ];
 662         char *lun;              /* <bc> */
 663         char *x_big_msgbuf = NULL;
 664
 665         if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
 666                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 667                 return;
 668         }
 669         if (CC->fake_username[0])
 670                 lun = CC->fake_username;
 671         else
 672                 lun = CC->user.fullname;
 673
 674         extract(x_user, argbuf, 0);
 675
 676         extract(x_msg, argbuf, 1);
 677
 678         if (!x_user[0]) {
 679                 cprintf("%d You were not previously paged.\n", ERROR + NO_SUCH_USER);
 680                 return;
 681         }
 682         if ((!strcasecmp(x_user, "broadcast")) && (CC->user.axlevel < 6)) {
 683                 cprintf("%d Higher access required to send a broadcast.\n",
 684                         ERROR + HIGHER_ACCESS_REQUIRED);
 685                 return;
 686         }
 687         /* This loop handles text-transfer pages */
 688         if (!strcmp(x_msg, "-")) {
 689                 message_sent = PerformXmsgHooks(lun, x_user, "");
 690                 if (message_sent == 0) {
 691                         cprintf("%d '%s' is not logged in "
 692                                 "or is not accepting pages.\n",
 693                                 ERROR + NO_SUCH_USER, x_user);
 694                         return;
 695                 }
 696                 cprintf("%d Transmit message (will deliver to %d users)\n",
 697                         SEND_LISTING, message_sent);
 698                 x_big_msgbuf = malloc(SIZ);
 699                 memset(x_big_msgbuf, 0, SIZ);
 700                 while (client_gets(x_msg), strcmp(x_msg, "000")) {
 701                         x_big_msgbuf = realloc(x_big_msgbuf,
 702                                strlen(x_big_msgbuf) + strlen(x_msg) + 4);
 703                         if (strlen(x_big_msgbuf) > 0)
 704                            if (x_big_msgbuf[strlen(x_big_msgbuf)] != '\n')
 705                                 strcat(x_big_msgbuf, "\n");
 706                         strcat(x_big_msgbuf, x_msg);
 707                 }
 708                 PerformXmsgHooks(lun, x_user, x_big_msgbuf);
 709                 free(x_big_msgbuf);
 710
 711                 /* This loop handles inline pages */
 712         } else {
 713                 message_sent = PerformXmsgHooks(lun, x_user, x_msg);
 714
 715                 if (message_sent > 0) {
 716                         if (strlen(x_msg) > 0)
 717                                 cprintf("%d Message sent", CIT_OK);
 718                         else
 719                                 cprintf("%d Ok to send message", CIT_OK);
 720                         if (message_sent > 1)
 721                                 cprintf(" to %d users", message_sent);
 722                         cprintf(".\n");
 723                 } else {
 724                         cprintf("%d '%s' is not logged in "
 725                                 "or is not accepting pages.\n",
 726                                 ERROR + NO_SUCH_USER, x_user);
 727                 }
 728
 729
 730         }
 731 }
 732
 733
 734
 735 /*
 736  * Enter or exit paging-disabled mode
 737  */
 738 void cmd_dexp(char *argbuf)
 739 {
 740         int new_state;
 741
 742         if (CtdlAccessCheck(ac_logged_in)) return;
 743
 744         new_state = extract_int(argbuf, 0);
 745         if ((new_state == 0) || (new_state == 1)) {
 746                 CC->disable_exp = new_state;
 747         }
 748
 749         cprintf("%d %d\n", CIT_OK, CC->disable_exp);
 750 }
 751
 752
 753 /*
 754  * Request client termination
 755  */
 756 void cmd_reqt(char *argbuf) {
 757         struct CitContext *ccptr;
 758         int sessions = 0;
 759         int which_session;
 760         struct ExpressMessage *newmsg;
 761
 762         if (CtdlAccessCheck(ac_aide)) return;
 763         which_session = extract_int(argbuf, 0);
 764
 765         begin_critical_section(S_SESSION_TABLE);
 766         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 767                 if ((ccptr->cs_pid == which_session) || (which_session == 0)) {
 768
 769                         newmsg = (struct ExpressMessage *)
 770                                 malloc(sizeof (struct ExpressMessage));
 771                         memset(newmsg, 0,
 772                                 sizeof (struct ExpressMessage));
 773                         time(&(newmsg->timestamp));
 774                         safestrncpy(newmsg->sender, CC->user.fullname,
 775                                     sizeof newmsg->sender);
 776                         newmsg->flags |= EM_GO_AWAY;
 777                         newmsg->text = strdup("Automatic logoff requested.");
 778
 779                         add_xmsg_to_context(ccptr, newmsg);
 780                         ++sessions;
 781
 782                 }
 783         }
 784         end_critical_section(S_SESSION_TABLE);
 785         cprintf("%d Sent termination request to %d sessions.\n", CIT_OK, sessions);
 786 }
 787
 788
 789
 790 char *serv_chat_init(void)
 791 {
 792         CtdlRegisterProtoHook(cmd_chat, "CHAT", "Begin real-time chat");
 793         CtdlRegisterProtoHook(cmd_pexp, "PEXP", "Poll for express messages");
 794         CtdlRegisterProtoHook(cmd_gexp, "GEXP", "Get express messages");
 795         CtdlRegisterProtoHook(cmd_sexp, "SEXP", "Send an express message");
 796         CtdlRegisterProtoHook(cmd_dexp, "DEXP", "Disable express messages");
 797         CtdlRegisterProtoHook(cmd_reqt, "REQT", "Request client termination");
 798         CtdlRegisterSessionHook(cmd_gexp_async, EVT_CMD);
 799         CtdlRegisterSessionHook(delete_express_messages, EVT_STOP);
 800         CtdlRegisterXmsgHook(send_express_message, XMSG_PRI_LOCAL);
 801         return "$Id$";
 802 }
 803