webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  *
   8  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32
  33 /*
  34  * String to unset the cookie.
  35  * Any date "in the past" will work, so I chose my birthday, right down to
  36  * the exact minute.  :)
  37  */
  38 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  39
  40 void unescape_input(char *buf)
  41 {
  42         int a, b;
  43         char hex[3];
  44
  45         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  46                 buf[strlen(buf) - 1] = 0;
  47
  48         for (a = 0; a < strlen(buf); ++a) {
  49                 if (buf[a] == '+')
  50                         buf[a] = ' ';
  51                 if (buf[a] == '%') {
  52                         hex[0] = buf[a + 1];
  53                         hex[1] = buf[a + 2];
  54                         hex[2] = 0;
  55                         sscanf(hex, "%02x", &b);
  56                         buf[a] = (char) b;
  57                         strcpy(&buf[a + 1], &buf[a + 3]);
  58                 }
  59         }
  60
  61 }
  62
  63
  64 void addurls(char *url)
  65 {
  66         char *up, *ptr;
  67         char buf[256];
  68         int a, b;
  69         struct urlcontent *u;
  70
  71         up = url;
  72         while (strlen(up) > 0) {
  73
  74                 /* locate the = sign */
  75                 strncpy(buf, up, 255);
  76                 b = (-1);
  77                 for (a = 255; a >= 0; --a)
  78                         if (buf[a] == '=')
  79                                 b = a;
  80                 if (b < 0)
  81                         return;
  82                 buf[b] = 0;
  83
  84                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  85                 u->next = WC->urlstrings;
  86                 WC->urlstrings = u;
  87                 strcpy(u->url_key, buf);
  88
  89                 /* now chop that part off */
  90                 for (a = 0; a <= b; ++a)
  91                         ++up;
  92
  93                 /* locate the & sign */
  94                 ptr = up;
  95                 b = strlen(up);
  96                 for (a = 0; a < strlen(up); ++a) {
  97                         if (!strncmp(ptr, "&", 1)) {
  98                                 b = a;
  99                                 break;
 100                         }
 101                         ++ptr;
 102                 }
 103                 ptr = up;
 104                 for (a = 0; a < b; ++a)
 105                         ++ptr;
 106                 strcpy(ptr, "");
 107
 108                 u->url_data = malloc(strlen(up) + 1);
 109                 strcpy(u->url_data, up);
 110                 u->url_data[b] = 0;
 111                 unescape_input(u->url_data);
 112                 up = ptr;
 113                 ++up;
 114         }
 115 }
 116
 117 void free_urls(void)
 118 {
 119         struct urlcontent *u;
 120
 121         while (WC->urlstrings != NULL) {
 122                 free(WC->urlstrings->url_data);
 123                 u = WC->urlstrings->next;
 124                 free(WC->urlstrings);
 125                 WC->urlstrings = u;
 126         }
 127 }
 128
 129 /*
 130  * Diagnostic function to display the contents of all variables
 131  */
 132 void dump_vars(void)
 133 {
 134         struct urlcontent *u;
 135
 136         for (u = WC->urlstrings; u != NULL; u = u->next) {
 137                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 138         }
 139 }
 140
 141 char *bstr(char *key)
 142 {
 143         struct urlcontent *u;
 144
 145         for (u = WC->urlstrings; u != NULL; u = u->next) {
 146                 if (!strcasecmp(u->url_key, key))
 147                         return (u->url_data);
 148         }
 149         return ("");
 150 }
 151
 152
 153 void wprintf(const char *format,...)
 154 {
 155         va_list arg_ptr;
 156         char wbuf[1024];
 157
 158         va_start(arg_ptr, format);
 159         vsprintf(wbuf, format, arg_ptr);
 160         va_end(arg_ptr);
 161
 162         write(WC->http_sock, wbuf, strlen(wbuf));
 163 }
 164
 165
 166 /*
 167  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 168  *
 169  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 170  * append the main menu and closing tags, or 2 to
 171  * append the closing tags only.
 172  */
 173 void wDumpContent(int print_standard_html_footer)
 174 {
 175         if (WC->fake_frames) {
 176                 wprintf("</TABLE>\n");
 177                 WC->fake_frames = 0;
 178         }
 179
 180         if (print_standard_html_footer) {
 181                 if (print_standard_html_footer != 2) {
 182                         wprintf("<BR>");
 183                 }
 184                 wprintf("</BODY></HTML>\n");
 185         }
 186
 187
 188 }
 189
 190
 191 /*
 192  * Copy a string, escaping characters which have meaning in HTML.  If
 193  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 194  */
 195 void stresc(char *target, char *strbuf, int nbsp)
 196 {
 197         int a;
 198         strcpy(target, "");
 199
 200         for (a = 0; a < strlen(strbuf); ++a) {
 201                 if (strbuf[a] == '<')
 202                         strcat(target, "&lt;");
 203                 else if (strbuf[a] == '>')
 204                         strcat(target, "&gt;");
 205                 else if (strbuf[a] == '&')
 206                         strcat(target, "&amp;");
 207                 else if (strbuf[a] == '\"')
 208                         strcat(target, "&quot;");
 209                 else if (strbuf[a] == '\'')
 210                         strcat(target, "&#39;");
 211                 else if (strbuf[a] == LB)
 212                         strcat(target, "<");
 213                 else if (strbuf[a] == RB)
 214                         strcat(target, ">");
 215                 else if (strbuf[a] == QU)
 216                         strcat(target, "\"");
 217                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 218                         strcat(target, "&nbsp;");
 219                 } else {
 220                         strncat(target, &strbuf[a], 1);
 221                 }
 222         }
 223 }
 224
 225 void escputs1(char *strbuf, int nbsp)
 226 {
 227         char buf[1024];
 228         stresc(buf, strbuf, nbsp);
 229         wprintf("%s", buf);
 230 }
 231
 232 void escputs(char *strbuf)
 233 {
 234         escputs1(strbuf, 0);
 235 }
 236
 237 /*
 238  * Escape a string for feeding out as a URL.
 239  * FIXME this is not threadsafe!
 240  */
 241 char *urlesc(char *strbuf)
 242 {
 243         int a, b, c;
 244         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 245         static char outbuf[1024];
 246
 247         strcpy(outbuf, "");
 248
 249         for (a = 0; a < strlen(strbuf); ++a) {
 250                 c = 0;
 251                 for (b = 0; b < strlen(ec); ++b) {
 252                         if (strbuf[a] == ec[b])
 253                                 c = 1;
 254                 }
 255                 b = strlen(outbuf);
 256                 if (c == 1)
 257                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 258                 else
 259                         sprintf(&outbuf[b], "%c", strbuf[a]);
 260         }
 261         return (outbuf);
 262 }
 263
 264 void urlescputs(char *strbuf)
 265 {
 266         wprintf("%s", urlesc(strbuf));
 267 }
 268
 269
 270
 271
 272 /*
 273  * Output all that important stuff that the browser will want to see
 274  *
 275  * control codes:
 276  *
 277  * Bits 0 and 1:
 278  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 279  * 1 = HTTP headers plus the room banner
 280  * 2 = HTTP headers required to terminate the session (unset cookies)
 281  * 3 = HTTP and HTML headers, but no room banner
 282  *
 283  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 284  *
 285  * Bit 3: suppress check for express messages
 286  */
 287 void output_headers(int controlcode)
 288 {
 289         char cookie[256];
 290         int print_standard_html_head = 0;
 291         int refresh30 = 0;
 292         int suppress_check = 0;
 293         char httpnow[256];
 294         static int pageseq = 0;
 295
 296         print_standard_html_head        =       controlcode & 0x03;
 297         refresh30                       =       ((controlcode & 0x04) >> 2);
 298         suppress_check                  =       ((controlcode & 0x08) >> 3);
 299
 300         wprintf("HTTP/1.0 200 OK\n");
 301
 302         httpdate(httpnow, time(NULL));
 303
 304         if (print_standard_html_head > 0) {
 305                 wprintf("Content-type: text/html\n");
 306                 wprintf("Server: %s\n", SERVER);
 307                 wprintf("Connection: close\n");
 308                 wprintf("Pragma: no-cache\n");
 309                 wprintf("Cache-Control: no-store\n");
 310         }
 311         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 312                         WC->wc_password, WC->wc_roomname);
 313         if (print_standard_html_head == 2) {
 314                 wprintf("Set-cookie: webcit=%s\n", unset);
 315         } else {
 316                 wprintf("Set-cookie: webcit=%s\n", cookie);
 317         }
 318
 319         if (print_standard_html_head > 0) {
 320                 wprintf("\n");
 321                 wprintf("<HTML><HEAD><TITLE>");
 322                 escputs(serv_info.serv_humannode);
 323                 wprintf("</TITLE>\n"
 324                         "<META HTTP-EQUIV=\"Expires\" CONTENT=\"0\">\n"
 325                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n");
 326                 if (refresh30) wprintf(
 327                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 328                 wprintf("</HEAD>\n");
 329
 330                 /* script for checking for express msgs (not always launch) */
 331                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 332                 wprintf("function launch_page_popup() {\n");
 333                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', 'toolbar=no,location=no,copyhistory=no,status=no,scrollbars=yes,resizable=no,height=150,width=400');\n");
 334                 wprintf("}\n");
 335                 wprintf("</SCRIPT>\n", ++pageseq);
 336                 /* end script */
 337
 338                 /* JavaScript keyboard-based navigation would go here if it
 339                  * were finished
 340                  */
 341
 342                 if (!suppress_check) if (WC->HaveExpressMessages) {
 343                         svprintf("extrabodyparms", WCS_STRING, "%s",
 344                                 "onload=\"launch_page_popup()\" ");
 345                         WC->HaveExpressMessages = 0;
 346                 }
 347                 do_template("background.html");
 348                 clear_local_substs();
 349
 350         if (print_standard_html_head == 1) {
 351                 wprintf("<A NAME=\"TheTop\"></A>");
 352
 353                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 354                         "<TD>\n");
 355
 356                 embed_room_banner(NULL);
 357
 358                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 359
 360                 WC->fake_frames = 1;
 361                 }
 362         }
 363 }
 364
 365
 366 /*
 367  *
 368  */
 369 void http_redirect(char *whichpage) {
 370         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 371         wprintf("Location: %s\n", whichpage);
 372         wprintf("URI: %s\n", whichpage);
 373         wprintf("Content-type: text/html\n\n");
 374         wprintf("<html><body>\n");
 375         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 376                 whichpage);
 377         wprintf("</body></html>\n");
 378 }
 379
 380
 381
 382 void check_for_express_messages()
 383 {
 384         char buf[256];
 385
 386         serv_puts("NOOP");
 387         serv_gets(buf);
 388         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 389 }
 390
 391
 392
 393
 394 void output_static(char *what)
 395 {
 396         char buf[4096];
 397         long thisblock;
 398         FILE *fp;
 399         struct stat statbuf;
 400         off_t bytes;
 401
 402         sprintf(buf, "static/%s", what);
 403         fp = fopen(buf, "rb");
 404         if (fp == NULL) {
 405                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 406                 wprintf("Content-Type: text/plain\n");
 407                 wprintf("\n");
 408                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 409         } else {
 410                 output_headers(0);
 411
 412                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 413                         wprintf("Content-type: image/gif\n");
 414                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 415                         wprintf("Content-type: text/plain\n");
 416                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 417                         wprintf("Content-type: image/jpeg\n");
 418                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 419                         wprintf("Content-type: text/html\n");
 420                 else
 421                         wprintf("Content-type: application/octet-stream\n");
 422
 423                 fstat(fileno(fp), &statbuf);
 424                 bytes = statbuf.st_size;
 425                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 426                 wprintf("Content-length: %ld\n", (long) bytes);
 427                 wprintf("\n");
 428                 while (bytes > 0) {
 429                         thisblock = sizeof(buf);
 430                         if (thisblock > bytes) thisblock = bytes;
 431                         fread(buf, thisblock, 1, fp);
 432                         write(WC->http_sock, buf, thisblock);
 433                         bytes = bytes - thisblock;
 434                 }
 435                 fclose(fp);
 436         }
 437         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 438                 end_webcit_session();
 439         }
 440 }
 441
 442 /*
 443  * When the browser requests an image file from the Citadel server,
 444  * this function is called to transmit it.
 445  */
 446 void output_image()
 447 {
 448         char buf[256];
 449         char xferbuf[4096];
 450         off_t bytes;
 451         off_t thisblock;
 452         off_t accomplished = 0L;
 453
 454
 455         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 456         serv_gets(buf);
 457         if (buf[0] == '2') {
 458                 bytes = extract_long(&buf[4], 0);
 459                 output_headers(0);
 460                 wprintf("Content-type: image/gif\n");
 461                 wprintf("Content-length: %ld\n", (long) bytes);
 462                 wprintf("\n");
 463
 464                 while (bytes > (off_t) 0) {
 465                         thisblock = (off_t) sizeof(xferbuf);
 466                         if (thisblock > bytes)
 467                                 thisblock = bytes;
 468                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 469                         serv_gets(buf);
 470                         if (buf[0] == '6')
 471                                 thisblock = extract_long(&buf[4], 0);
 472                         serv_read(xferbuf, (int) thisblock);
 473                         write(WC->http_sock, xferbuf, thisblock);
 474                         bytes = bytes - thisblock;
 475                         accomplished = accomplished + thisblock;
 476                 }
 477                 serv_puts("CLOS");
 478                 serv_gets(buf);
 479         } else {
 480                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 481                 output_headers(0);
 482                 wprintf("Content-Type: text/plain\n");
 483                 wprintf("\n");
 484                 wprintf("Error retrieving image\n");
 485         }
 486
 487 }
 488
 489
 490 /*
 491  * Convenience functions to display a page containing only a string
 492  */
 493 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 494 {
 495         wprintf("HTTP/1.0 200 OK\n");
 496         output_headers(1);
 497         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 498         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 499         wprintf("<B>%s</B>\n", titlebarmsg);
 500         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 501         escputs(messagetext);
 502
 503         wprintf("<HR>\n");
 504         wDumpContent(1);
 505 }
 506
 507
 508 /*
 509  * Display a blank page.
 510  */
 511 void blank_page(void) {
 512         output_headers(7);
 513         wDumpContent(2);
 514 }
 515
 516
 517 void display_error(char *errormessage)
 518 {
 519         convenience_page("770000", "Error", errormessage);
 520 }
 521
 522 void display_success(char *successmessage)
 523 {
 524         convenience_page("007700", "OK", successmessage);
 525 }
 526
 527
 528
 529 void extract_action(char *actbuf, char *cmdbuf)
 530 {
 531         int i;
 532
 533         strcpy(actbuf, cmdbuf);
 534         if (!strncasecmp(actbuf, "GET /", 5))
 535                 strcpy(actbuf, &actbuf[5]);
 536         if (!strncasecmp(actbuf, "PUT /", 5))
 537                 strcpy(actbuf, &actbuf[5]);
 538         if (!strncasecmp(actbuf, "POST /", 6))
 539                 strcpy(actbuf, &actbuf[6]);
 540
 541         for (i = 0; i < strlen(actbuf); ++i) {
 542                 if (actbuf[i] == ' ') {
 543                         actbuf[i] = 0;
 544                         i = 0;
 545                 }
 546                 if (actbuf[i] == '/') {
 547                         actbuf[i] = 0;
 548                         i = 0;
 549                 }
 550                 if (actbuf[i] == '?') {
 551                         actbuf[i] = 0;
 552                         i = 0;
 553                 }
 554                 if (actbuf[i] == '&') {
 555                         actbuf[i] = 0;
 556                         i = 0;
 557                 }
 558         }
 559 }
 560
 561
 562 void upload_handler(char *name, char *filename, char *encoding,
 563                     void *content, char *cbtype, size_t length)
 564 {
 565
 566         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 567         fprintf(stderr, "    name = %s\n", name);
 568         fprintf(stderr, "filename = %s\n", filename);
 569         fprintf(stderr, "encoding = %s\n", encoding);
 570         fprintf(stderr, "    type = %s\n", cbtype);
 571         fprintf(stderr, "  length = %ld\n", (long)length);
 572
 573         if (strlen(name) > 0) {
 574                 WC->upload = malloc(length);
 575                 if (WC->upload != NULL) {
 576                         WC->upload_length = length;
 577                         memcpy(WC->upload, content, length);
 578                 }
 579         }
 580 }
 581
 582
 583 /*
 584  * Entry point for WebCit transaction
 585  */
 586 void session_loop(struct httprequest *req)
 587 {
 588         char cmd[256];
 589         char action[256];
 590         char buf[256];
 591         int a, b;
 592         int ContentLength = 0;
 593         int BytesRead;
 594         char ContentType[512];
 595         char *content;
 596         struct httprequest *hptr;
 597         char browser_host[256];
 598         char user_agent[256];
 599
 600         /* We stuff these with the values coming from the client cookies,
 601          * so we can use them to reconnect a timed out session if we have to.
 602          */
 603         char c_host[256];
 604         char c_port[256];
 605         char c_username[256];
 606         char c_password[256];
 607         char c_roomname[256];
 608         char cookie[256];
 609
 610         strcpy(c_host, defaulthost);
 611         strcpy(c_port, defaultport);
 612         strcpy(c_username, "");
 613         strcpy(c_password, "");
 614         strcpy(c_roomname, "");
 615
 616         WC->upload_length = 0;
 617         WC->upload = NULL;
 618
 619         hptr = req;
 620         if (hptr == NULL) return;
 621
 622         strcpy(cmd, hptr->line);
 623         hptr = hptr->next;
 624         extract_action(action, cmd);
 625
 626         while (hptr != NULL) {
 627                 strcpy(buf, hptr->line);
 628                 hptr = hptr->next;
 629
 630                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 631                         strcpy(cookie, &buf[15]);
 632                         cookie_to_stuff(cookie, NULL,
 633                                       c_username, c_password, c_roomname);
 634                 }
 635                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 636                         ContentLength = atoi(&buf[16]);
 637                 }
 638                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 639                         strcpy(ContentType, &buf[14]);
 640                 }
 641                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 642                         strcpy(user_agent, &buf[12]);
 643                 }
 644         }
 645
 646         if (ContentLength > 0) {
 647                 fprintf(stderr, "Content length: %d\n", ContentLength);
 648                 content = malloc(ContentLength + 1);
 649                 memset(content, 0, ContentLength+1);
 650                 BytesRead = 0;
 651
 652                 while (BytesRead < ContentLength) {
 653                         a=read(WC->http_sock, &content[BytesRead],
 654                                 ContentLength - BytesRead);
 655                         if (a <= 0) BytesRead = ContentLength;
 656                         else BytesRead += a;
 657                 }
 658
 659                 if (!strncasecmp(ContentType,
 660                               "application/x-www-form-urlencoded", 33)) {
 661                         addurls(content);
 662                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 663                         mime_parser(content, ContentLength, ContentType,
 664                                     *upload_handler);
 665                 }
 666         } else {
 667                 content = NULL;
 668         }
 669
 670         /* If there are variables in the URL, we must grab them now */
 671         for (a = 0; a < strlen(cmd); ++a)
 672                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 673                         for (b = a; b < strlen(cmd); ++b)
 674                                 if (isspace(cmd[b]))
 675                                         cmd[b] = 0;
 676                         addurls(&cmd[a + 1]);
 677                         cmd[a] = 0;
 678                 }
 679         /*
 680          * If we're not connected to a Citadel server, try to hook up the
 681          * connection now.  Preference is given to the host and port specified
 682          * by browser cookies, if cookies have been supplied.
 683          */
 684         if (!WC->connected) {
 685                 if (strlen(bstr("host")) > 0)
 686                         strcpy(c_host, bstr("host"));
 687                 if (strlen(bstr("port")) > 0)
 688                         strcpy(c_port, bstr("port"));
 689
 690                 if (!strcasecmp(c_host, "uds")) {
 691                         /* unix domain socket */
 692                         sprintf(buf, "%s/citadel.socket", c_port);
 693                         WC->serv_sock = uds_connectsock(buf);
 694                 }
 695                 else {
 696                         /* tcp socket */
 697                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 698                 }
 699
 700                 if (WC->serv_sock < 0) {
 701                         do_logout();
 702                 }
 703
 704                 WC->connected = 1;
 705                 serv_gets(buf); /* get the server welcome message */
 706                 locate_host(browser_host, WC->http_sock);
 707                 get_serv_info(browser_host, user_agent);
 708         }
 709
 710         check_for_express_messages();
 711
 712         /*
 713          * If we're not logged in, but we have username and password cookies
 714          * supplied by the browser, try using them to log in.
 715          */
 716         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 717                 serv_printf("USER %s", c_username);
 718                 serv_gets(buf);
 719                 if (buf[0] == '3') {
 720                         serv_printf("PASS %s", c_password);
 721                         serv_gets(buf);
 722                         if (buf[0] == '2') {
 723                                 become_logged_in(c_username, c_password, buf);
 724                         }
 725                 }
 726         }
 727         /*
 728          * If we don't have a current room, but a cookie specifying the
 729          * current room is supplied, make an effort to go there.
 730          */
 731         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 732                 serv_printf("GOTO %s", c_roomname);
 733                 serv_gets(buf);
 734                 if (buf[0] == '2') {
 735                         strcpy(WC->wc_roomname, c_roomname);
 736                 }
 737         }
 738         if (!strcasecmp(action, "static")) {
 739                 strcpy(buf, &cmd[12]);
 740                 for (a = 0; a < strlen(buf); ++a)
 741                         if (isspace(buf[a]))
 742                                 buf[a] = 0;
 743                 output_static(buf);
 744         } else if (!strcasecmp(action, "image")) {
 745                 output_image();
 746         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 747                 do_login();
 748         } else if (!WC->logged_in) {
 749                 display_login(NULL);
 750         }
 751         /* Various commands... */
 752
 753         else if (!strcasecmp(action, "do_welcome")) {
 754                 do_welcome();
 755         } else if (!strcasecmp(action, "blank")) {
 756                 blank_page();
 757         } else if (!strcasecmp(action, "display_main_menu")) {
 758                 display_main_menu();
 759         } else if (!strcasecmp(action, "whobbs")) {
 760                 whobbs();
 761         } else if (!strcasecmp(action, "knrooms")) {
 762                 list_all_rooms_by_floor();
 763         } else if (!strcasecmp(action, "gotonext")) {
 764                 slrp_highest();
 765                 gotonext();
 766         } else if (!strcasecmp(action, "skip")) {
 767                 gotonext();
 768         } else if (!strcasecmp(action, "ungoto")) {
 769                 ungoto();
 770         } else if (!strcasecmp(action, "dotgoto")) {
 771                 slrp_highest();
 772                 smart_goto(bstr("room"));
 773         } else if (!strcasecmp(action, "termquit")) {
 774                 do_logout();
 775         } else if (!strcasecmp(action, "readnew")) {
 776                 readloop("readnew");
 777         } else if (!strcasecmp(action, "readold")) {
 778                 readloop("readold");
 779         } else if (!strcasecmp(action, "readfwd")) {
 780                 readloop("readfwd");
 781         } else if (!strcasecmp(action, "headers")) {
 782                 readloop("headers");
 783         } else if (!strcasecmp(action, "display_enter")) {
 784                 display_enter();
 785         } else if (!strcasecmp(action, "post")) {
 786                 post_message();
 787         } else if (!strcasecmp(action, "delete_msg")) {
 788                 delete_msg();
 789         } else if (!strcasecmp(action, "confirm_move_msg")) {
 790                 confirm_move_msg();
 791         } else if (!strcasecmp(action, "move_msg")) {
 792                 move_msg();
 793         } else if (!strcasecmp(action, "userlist")) {
 794                 userlist();
 795         } else if (!strcasecmp(action, "showuser")) {
 796                 showuser();
 797         } else if (!strcasecmp(action, "display_page")) {
 798                 display_page();
 799         } else if (!strcasecmp(action, "page_user")) {
 800                 page_user();
 801         } else if (!strcasecmp(action, "chat")) {
 802                 do_chat();
 803         } else if (!strcasecmp(action, "display_private")) {
 804                 display_private("", 0);
 805         } else if (!strcasecmp(action, "goto_private")) {
 806                 goto_private();
 807         } else if (!strcasecmp(action, "zapped_list")) {
 808                 zapped_list();
 809         } else if (!strcasecmp(action, "display_zap")) {
 810                 display_zap();
 811         } else if (!strcasecmp(action, "zap")) {
 812                 zap();
 813         } else if (!strcasecmp(action, "display_entroom")) {
 814                 display_entroom();
 815         } else if (!strcasecmp(action, "entroom")) {
 816                 entroom();
 817         } else if (!strcasecmp(action, "display_editroom")) {
 818                 display_editroom();
 819         } else if (!strcasecmp(action, "editroom")) {
 820                 editroom();
 821         } else if (!strcasecmp(action, "display_whok")) {
 822                 display_whok();
 823         } else if (!strcasecmp(action, "display_editinfo")) {
 824                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 825         } else if (!strcasecmp(action, "editinfo")) {
 826                 save_edit("Room info", "EINF 1", 1);
 827         } else if (!strcasecmp(action, "display_editbio")) {
 828                 sprintf(buf, "RBIO %s", WC->wc_username);
 829                 display_edit("Your bio", "NOOP", buf, "editbio");
 830         } else if (!strcasecmp(action, "editbio")) {
 831                 save_edit("Your bio", "EBIO", 0);
 832         } else if (!strcasecmp(action, "confirm_delete_room")) {
 833                 confirm_delete_room();
 834         } else if (!strcasecmp(action, "delete_room")) {
 835                 delete_room();
 836         } else if (!strcasecmp(action, "validate")) {
 837                 validate();
 838         } else if (!strcasecmp(action, "display_editpic")) {
 839                 display_graphics_upload("your photo",
 840                                         "UIMG 0|_userpic_",
 841                                         "/editpic");
 842         } else if (!strcasecmp(action, "editpic")) {
 843                 do_graphics_upload("UIMG 1|_userpic_");
 844         } else if (!strcasecmp(action, "display_editroompic")) {
 845                 display_graphics_upload("the graphic for this room",
 846                                         "UIMG 0|_roompic_",
 847                                         "/editroompic");
 848         } else if (!strcasecmp(action, "editroompic")) {
 849                 do_graphics_upload("UIMG 1|_roompic_");
 850         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 851                 select_floor_to_edit_pic();
 852         } else if (!strcasecmp(action, "display_editfloorpic")) {
 853                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 854                         bstr("which_floor"));
 855                 display_graphics_upload("the graphic for this floor",
 856                                         buf,
 857                                         "/editfloorpic");
 858         } else if (!strcasecmp(action, "editfloorpic")) {
 859                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 860                         bstr("which_floor"));
 861                 do_graphics_upload(buf);
 862         } else if (!strcasecmp(action, "display_reg")) {
 863                 display_reg(0);
 864         } else if (!strcasecmp(action, "register")) {
 865                 register_user();
 866         } else if (!strcasecmp(action, "display_changepw")) {
 867                 display_changepw();
 868         } else if (!strcasecmp(action, "changepw")) {
 869                 changepw();
 870         } else if (!strcasecmp(action, "display_edit_node")) {
 871                 display_edit_node();
 872         } else if (!strcasecmp(action, "display_netconf")) {
 873                 display_netconf();
 874         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 875                 display_confirm_unshare();
 876         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 877                 display_confirm_delete_node();
 878         } else if (!strcasecmp(action, "delete_node")) {
 879                 delete_node();
 880         } else if (!strcasecmp(action, "unshare")) {
 881                 unshare();
 882         } else if (!strcasecmp(action, "display_add_node")) {
 883                 display_add_node();
 884         } else if (!strcasecmp(action, "add_node")) {
 885                 add_node();
 886         } else if (!strcasecmp(action, "display_share")) {
 887                 display_share();
 888         } else if (!strcasecmp(action, "share")) {
 889                 share();
 890         } else if (!strcasecmp(action, "terminate_session")) {
 891                 slrp_highest();
 892                 terminate_session();
 893         } else if (!strcasecmp(action, "edit_me")) {
 894                 edit_me();
 895         } else if (!strcasecmp(action, "display_siteconfig")) {
 896                 display_siteconfig();
 897         } else if (!strcasecmp(action, "page_popup")) {
 898                 page_popup();
 899         } else if (!strcasecmp(action, "siteconfig")) {
 900                 siteconfig();
 901         } else if (!strcasecmp(action, "display_generic")) {
 902                 display_generic();
 903         } else if (!strcasecmp(action, "do_generic")) {
 904                 do_generic();
 905         } else if (!strcasecmp(action, "display_menubar")) {
 906                 display_menubar(1);
 907         } else if (!strcasecmp(action, "diagnostics")) {
 908                 output_headers(1);
 909
 910                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 911                 wprintf("Command: <BR><PRE>\n");
 912                 escputs(cmd);
 913                 wprintf("</PRE><HR>\n");
 914                 wprintf("Variables: <BR><PRE>\n");
 915                 dump_vars();
 916                 wprintf("</PRE><HR>\n");
 917                 wDumpContent(1);
 918         }
 919         /* When all else fais, display the main menu. */
 920         else {
 921                 display_main_menu();
 922         }
 923
 924         fflush(stdout);
 925         if (content != NULL) {
 926                 free(content);
 927                 content = NULL;
 928         }
 929         free_urls();
 930         if (WC->upload_length > 0) {
 931                 free(WC->upload);
 932                 WC->upload_length = 0;
 933         }
 934 }