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("<CENTER><FONT SIZE=-1>"
 177                         "<TABLE border=0 width=100%><TR>"
 178                         "<TD><A HREF=\"/ungoto\">"
 179                         "<IMG SRC=\"/static/back.gif\" BORDER=0>"
 180                         "Ungoto</A></TD>");
 181                 wprintf("<TD><A HREF=\"#TheTop\">"
 182                         "<IMG SRC=\"/static/up.gif\" BORDER=0>"
 183                         "Top of page</A></TD>");
 184                 wprintf("<TD><A HREF=\"/display_enter\">"
 185                         "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
 186                         "Enter a message</A></TD>");
 187                 wprintf("<TD><A HREF=\"/gotonext\">"
 188                         "Goto next room"
 189                         "<IMG SRC=\"/static/forward.gif\" BORDER=0></A></TD>"
 190                         "</TR></TABLE>"
 191                         "</FONT>\n"
 192                         "</TD></TR></TABLE></TABLE>\n");
 193                 WC->fake_frames = 0;
 194         }
 195
 196         if (print_standard_html_footer) {
 197                 if (print_standard_html_footer != 2) {
 198                         wprintf("<BR>");
 199                 }
 200                 wprintf("</BODY></HTML>\n");
 201         }
 202
 203
 204 }
 205
 206
 207 /*
 208  * Copy a string, escaping characters which have meaning in HTML.  If
 209  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 210  */
 211 void stresc(char *target, char *strbuf, int nbsp)
 212 {
 213         int a;
 214         strcpy(target, "");
 215
 216         for (a = 0; a < strlen(strbuf); ++a) {
 217                 if (strbuf[a] == '<')
 218                         strcat(target, "&lt;");
 219                 else if (strbuf[a] == '>')
 220                         strcat(target, "&gt;");
 221                 else if (strbuf[a] == '&')
 222                         strcat(target, "&amp;");
 223                 else if (strbuf[a] == '\"')
 224                         strcat(target, "&quot;");
 225                 else if (strbuf[a] == '\'')
 226                         strcat(target, "&#39;");
 227                 else if (strbuf[a] == LB)
 228                         strcat(target, "<");
 229                 else if (strbuf[a] == RB)
 230                         strcat(target, ">");
 231                 else if (strbuf[a] == QU)
 232                         strcat(target, "\"");
 233                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 234                         strcat(target, "&nbsp;");
 235                 } else {
 236                         strncat(target, &strbuf[a], 1);
 237                 }
 238         }
 239 }
 240
 241 void escputs1(char *strbuf, int nbsp)
 242 {
 243         char buf[1024];
 244         stresc(buf, strbuf, nbsp);
 245         wprintf("%s", buf);
 246 }
 247
 248 void escputs(char *strbuf)
 249 {
 250         escputs1(strbuf, 0);
 251 }
 252
 253 /*
 254  * Escape a string for feeding out as a URL.
 255  * FIXME this is not threadsafe!
 256  */
 257 char *urlesc(char *strbuf)
 258 {
 259         int a, b, c;
 260         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 261         static char outbuf[1024];
 262
 263         strcpy(outbuf, "");
 264
 265         for (a = 0; a < strlen(strbuf); ++a) {
 266                 c = 0;
 267                 for (b = 0; b < strlen(ec); ++b) {
 268                         if (strbuf[a] == ec[b])
 269                                 c = 1;
 270                 }
 271                 b = strlen(outbuf);
 272                 if (c == 1)
 273                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 274                 else
 275                         sprintf(&outbuf[b], "%c", strbuf[a]);
 276         }
 277         return (outbuf);
 278 }
 279
 280 void urlescputs(char *strbuf)
 281 {
 282         wprintf("%s", urlesc(strbuf));
 283 }
 284
 285
 286
 287
 288 /*
 289  * Output all that important stuff that the browser will want to see
 290  *
 291  * control codes:
 292  *
 293  * Bits 0 and 1:
 294  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 295  * 1 = HTTP headers plus the "fake frames" found in most windows.
 296  * 2 = HTTP headers required to terminate the session (unset cookies)
 297  * 3 = HTTP and HTML headers, but no 'fake frames'
 298  *
 299  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 300  *
 301  * Bit 3: suppress check for express messages
 302  */
 303 void output_headers(int controlcode)
 304 {
 305         char cookie[256];
 306         int print_standard_html_head = 0;
 307         int refresh30 = 0;
 308         int suppress_check = 0;
 309         char httpnow[256];
 310         static int pageseq = 0;
 311
 312         print_standard_html_head        =       controlcode & 0x03;
 313         refresh30                       =       ((controlcode & 0x04) >> 2);
 314         suppress_check                  =       ((controlcode & 0x08) >> 3);
 315
 316         wprintf("HTTP/1.0 200 OK\n");
 317
 318         httpdate(httpnow, time(NULL));
 319
 320         if (print_standard_html_head > 0) {
 321                 wprintf("Content-type: text/html\n");
 322                 wprintf("Server: %s\n", SERVER);
 323                 wprintf("Connection: close\n");
 324                 wprintf("Pragma: no-cache\n");
 325                 wprintf("Cache-Control: no-store\n");
 326         }
 327         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 328                         WC->wc_password, WC->wc_roomname);
 329         if (print_standard_html_head == 2) {
 330                 wprintf("Set-cookie: webcit=%s\n", unset);
 331         } else {
 332                 wprintf("Set-cookie: webcit=%s\n", cookie);
 333         }
 334
 335         if (print_standard_html_head > 0) {
 336                 wprintf("\n");
 337                 wprintf("<HTML><HEAD><TITLE>");
 338                 escputs(serv_info.serv_humannode);
 339                 wprintf("</TITLE>\n"
 340                         "<META HTTP-EQUIV=\"Expires\" CONTENT=\"0\">\n"
 341                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n");
 342                 if (refresh30) wprintf(
 343                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 344                 wprintf("</HEAD>\n");
 345
 346                 /* script for checking for express msgs (not always launch) */
 347                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 348                 wprintf("function launch_page_popup() {\n");
 349                 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");
 350                 wprintf("}\n");
 351                 wprintf("</SCRIPT>\n", ++pageseq);
 352                 /* end script */
 353
 354                 /* JavaScript keyboard-based navigation would go here if it
 355                  * were finished
 356                  */
 357
 358                 wprintf("<BODY MARGINWIDTH=0 MARGINHEIGHT=0 ");
 359                 if (!suppress_check) if (WC->HaveExpressMessages) {
 360                         wprintf("onload=\"launch_page_popup()\" ");
 361                         WC->HaveExpressMessages = 0;
 362                 }
 363                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 364
 365         if (print_standard_html_head == 1) {
 366                 wprintf("<A NAME=\"TheTop\"></A>"
 367                         "<TABLE border=0 width=100%>"
 368                         "<TR VALIGN=TOP><TD VALIGN=LEFT CELLPADDING=0>");
 369
 370                 display_menubar(0);
 371
 372                 wprintf("</TD><TD VALIGN=TOP>"
 373                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 374                         "<TD>\n");
 375
 376                 embed_room_banner(NULL);
 377
 378                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 379
 380                 WC->fake_frames = 1;
 381                 }
 382         }
 383 }
 384
 385
 386 /*
 387  *
 388  */
 389 void http_redirect(char *whichpage) {
 390         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 391         wprintf("Location: %s\n", whichpage);
 392         wprintf("URI: %s\n", whichpage);
 393         wprintf("Content-type: text/html\n\n");
 394         wprintf("<html><body>\n");
 395         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 396                 whichpage);
 397         wprintf("</body></html>\n");
 398 }
 399
 400
 401
 402 void check_for_express_messages()
 403 {
 404         char buf[256];
 405
 406         serv_puts("NOOP");
 407         serv_gets(buf);
 408         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 409 }
 410
 411
 412
 413
 414 void output_static(char *what)
 415 {
 416         char buf[4096];
 417         long thisblock;
 418         FILE *fp;
 419         struct stat statbuf;
 420         off_t bytes;
 421
 422         sprintf(buf, "static/%s", what);
 423         fp = fopen(buf, "rb");
 424         if (fp == NULL) {
 425                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 426                 wprintf("Content-Type: text/plain\n");
 427                 wprintf("\n");
 428                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 429         } else {
 430                 output_headers(0);
 431
 432                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 433                         wprintf("Content-type: image/gif\n");
 434                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 435                         wprintf("Content-type: text/plain\n");
 436                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 437                         wprintf("Content-type: image/jpeg\n");
 438                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 439                         wprintf("Content-type: text/html\n");
 440                 else
 441                         wprintf("Content-type: application/octet-stream\n");
 442
 443                 fstat(fileno(fp), &statbuf);
 444                 bytes = statbuf.st_size;
 445                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 446                 wprintf("Content-length: %ld\n", (long) bytes);
 447                 wprintf("\n");
 448                 while (bytes > 0) {
 449                         thisblock = sizeof(buf);
 450                         if (thisblock > bytes) thisblock = bytes;
 451                         fread(buf, thisblock, 1, fp);
 452                         write(WC->http_sock, buf, thisblock);
 453                         bytes = bytes - thisblock;
 454                 }
 455                 fclose(fp);
 456         }
 457         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 458                 end_webcit_session();
 459         }
 460 }
 461
 462 /*
 463  * When the browser requests an image file from the Citadel server,
 464  * this function is called to transmit it.
 465  */
 466 void output_image()
 467 {
 468         char buf[256];
 469         char xferbuf[4096];
 470         off_t bytes;
 471         off_t thisblock;
 472         off_t accomplished = 0L;
 473
 474
 475         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 476         serv_gets(buf);
 477         if (buf[0] == '2') {
 478                 bytes = extract_long(&buf[4], 0);
 479                 output_headers(0);
 480                 wprintf("Content-type: image/gif\n");
 481                 wprintf("Content-length: %ld\n", (long) bytes);
 482                 wprintf("\n");
 483
 484                 while (bytes > (off_t) 0) {
 485                         thisblock = (off_t) sizeof(xferbuf);
 486                         if (thisblock > bytes)
 487                                 thisblock = bytes;
 488                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 489                         serv_gets(buf);
 490                         if (buf[0] == '6')
 491                                 thisblock = extract_long(&buf[4], 0);
 492                         serv_read(xferbuf, (int) thisblock);
 493                         write(WC->http_sock, xferbuf, thisblock);
 494                         bytes = bytes - thisblock;
 495                         accomplished = accomplished + thisblock;
 496                 }
 497                 serv_puts("CLOS");
 498                 serv_gets(buf);
 499         } else {
 500                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 501                 output_headers(0);
 502                 wprintf("Content-Type: text/plain\n");
 503                 wprintf("\n");
 504                 wprintf("Error retrieving image\n");
 505         }
 506
 507 }
 508
 509
 510 /*
 511  * Convenience functions to display a page containing only a string
 512  */
 513 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 514 {
 515         wprintf("HTTP/1.0 200 OK\n");
 516         output_headers(1);
 517         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 518         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 519         wprintf("<B>%s</B>\n", titlebarmsg);
 520         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 521         escputs(messagetext);
 522
 523         wprintf("<HR>\n");
 524         embed_main_menu();
 525         wDumpContent(1);
 526 }
 527
 528 void display_error(char *errormessage)
 529 {
 530         convenience_page("770000", "Error", errormessage);
 531 }
 532
 533 void display_success(char *successmessage)
 534 {
 535         convenience_page("007700", "OK", successmessage);
 536 }
 537
 538
 539
 540 void extract_action(char *actbuf, char *cmdbuf)
 541 {
 542         int i;
 543
 544         strcpy(actbuf, cmdbuf);
 545         if (!strncasecmp(actbuf, "GET /", 5))
 546                 strcpy(actbuf, &actbuf[5]);
 547         if (!strncasecmp(actbuf, "PUT /", 5))
 548                 strcpy(actbuf, &actbuf[5]);
 549         if (!strncasecmp(actbuf, "POST /", 6))
 550                 strcpy(actbuf, &actbuf[6]);
 551
 552         for (i = 0; i < strlen(actbuf); ++i) {
 553                 if (actbuf[i] == ' ') {
 554                         actbuf[i] = 0;
 555                         i = 0;
 556                 }
 557                 if (actbuf[i] == '/') {
 558                         actbuf[i] = 0;
 559                         i = 0;
 560                 }
 561                 if (actbuf[i] == '?') {
 562                         actbuf[i] = 0;
 563                         i = 0;
 564                 }
 565                 if (actbuf[i] == '&') {
 566                         actbuf[i] = 0;
 567                         i = 0;
 568                 }
 569         }
 570 }
 571
 572
 573 void upload_handler(char *name, char *filename, char *encoding,
 574                     void *content, char *cbtype, size_t length)
 575 {
 576
 577         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 578         fprintf(stderr, "    name = %s\n", name);
 579         fprintf(stderr, "filename = %s\n", filename);
 580         fprintf(stderr, "encoding = %s\n", encoding);
 581         fprintf(stderr, "    type = %s\n", cbtype);
 582         fprintf(stderr, "  length = %ld\n", (long)length);
 583
 584         if (strlen(name) > 0) {
 585                 WC->upload = malloc(length);
 586                 if (WC->upload != NULL) {
 587                         WC->upload_length = length;
 588                         memcpy(WC->upload, content, length);
 589                 }
 590         }
 591 }
 592
 593
 594 /*
 595  * Entry point for WebCit transaction
 596  */
 597 void session_loop(struct httprequest *req)
 598 {
 599         char cmd[256];
 600         char action[256];
 601         char buf[256];
 602         int a, b;
 603         int ContentLength = 0;
 604         int BytesRead;
 605         char ContentType[512];
 606         char *content;
 607         struct httprequest *hptr;
 608         char browser_host[256];
 609         char user_agent[256];
 610
 611         /* We stuff these with the values coming from the client cookies,
 612          * so we can use them to reconnect a timed out session if we have to.
 613          */
 614         char c_host[256];
 615         char c_port[256];
 616         char c_username[256];
 617         char c_password[256];
 618         char c_roomname[256];
 619         char cookie[256];
 620
 621         strcpy(c_host, defaulthost);
 622         strcpy(c_port, defaultport);
 623         strcpy(c_username, "");
 624         strcpy(c_password, "");
 625         strcpy(c_roomname, "");
 626
 627         WC->upload_length = 0;
 628         WC->upload = NULL;
 629
 630         hptr = req;
 631         if (hptr == NULL) return;
 632
 633         strcpy(cmd, hptr->line);
 634         hptr = hptr->next;
 635         extract_action(action, cmd);
 636
 637         while (hptr != NULL) {
 638                 strcpy(buf, hptr->line);
 639                 hptr = hptr->next;
 640
 641                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 642                         strcpy(cookie, &buf[15]);
 643                         cookie_to_stuff(cookie, NULL,
 644                                       c_username, c_password, c_roomname);
 645                 }
 646                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 647                         ContentLength = atoi(&buf[16]);
 648                 }
 649                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 650                         strcpy(ContentType, &buf[14]);
 651                 }
 652                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 653                         strcpy(user_agent, &buf[12]);
 654                 }
 655         }
 656
 657         if (ContentLength > 0) {
 658                 fprintf(stderr, "Content length: %d\n", ContentLength);
 659                 content = malloc(ContentLength + 1);
 660                 memset(content, 0, ContentLength+1);
 661                 BytesRead = 0;
 662
 663                 while (BytesRead < ContentLength) {
 664                         a=read(WC->http_sock, &content[BytesRead],
 665                                 ContentLength - BytesRead);
 666                         if (a <= 0) BytesRead = ContentLength;
 667                         else BytesRead += a;
 668                 }
 669
 670                 if (!strncasecmp(ContentType,
 671                               "application/x-www-form-urlencoded", 33)) {
 672                         addurls(content);
 673                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 674                         mime_parser(content, ContentLength, ContentType,
 675                                     *upload_handler);
 676                 }
 677         } else {
 678                 content = NULL;
 679         }
 680
 681         /* If there are variables in the URL, we must grab them now */
 682         for (a = 0; a < strlen(cmd); ++a)
 683                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 684                         for (b = a; b < strlen(cmd); ++b)
 685                                 if (isspace(cmd[b]))
 686                                         cmd[b] = 0;
 687                         addurls(&cmd[a + 1]);
 688                         cmd[a] = 0;
 689                 }
 690         /*
 691          * If we're not connected to a Citadel server, try to hook up the
 692          * connection now.  Preference is given to the host and port specified
 693          * by browser cookies, if cookies have been supplied.
 694          */
 695         if (!WC->connected) {
 696                 if (strlen(bstr("host")) > 0)
 697                         strcpy(c_host, bstr("host"));
 698                 if (strlen(bstr("port")) > 0)
 699                         strcpy(c_port, bstr("port"));
 700
 701                 if (!strcasecmp(c_host, "uds")) {
 702                         /* unix domain socket */
 703                         sprintf(buf, "%s/citadel.socket", c_port);
 704                         WC->serv_sock = uds_connectsock(buf);
 705                 }
 706                 else {
 707                         /* tcp socket */
 708                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 709                 }
 710
 711                 if (WC->serv_sock < 0) {
 712                         do_logout();
 713                 }
 714
 715                 WC->connected = 1;
 716                 serv_gets(buf); /* get the server welcome message */
 717                 locate_host(browser_host, WC->http_sock);
 718                 get_serv_info(browser_host, user_agent);
 719         }
 720
 721         check_for_express_messages();
 722
 723         /*
 724          * If we're not logged in, but we have username and password cookies
 725          * supplied by the browser, try using them to log in.
 726          */
 727         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 728                 serv_printf("USER %s", c_username);
 729                 serv_gets(buf);
 730                 if (buf[0] == '3') {
 731                         serv_printf("PASS %s", c_password);
 732                         serv_gets(buf);
 733                         if (buf[0] == '2') {
 734                                 become_logged_in(c_username, c_password, buf);
 735                         }
 736                 }
 737         }
 738         /*
 739          * If we don't have a current room, but a cookie specifying the
 740          * current room is supplied, make an effort to go there.
 741          */
 742         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 743                 serv_printf("GOTO %s", c_roomname);
 744                 serv_gets(buf);
 745                 if (buf[0] == '2') {
 746                         strcpy(WC->wc_roomname, c_roomname);
 747                 }
 748         }
 749         if (!strcasecmp(action, "static")) {
 750                 strcpy(buf, &cmd[12]);
 751                 for (a = 0; a < strlen(buf); ++a)
 752                         if (isspace(buf[a]))
 753                                 buf[a] = 0;
 754                 output_static(buf);
 755         } else if (!strcasecmp(action, "image")) {
 756                 output_image();
 757         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 758                 do_login();
 759         } else if (!WC->logged_in) {
 760                 display_login(NULL);
 761         }
 762         /* Various commands... */
 763
 764         else if (!strcasecmp(action, "do_welcome")) {
 765                 do_welcome();
 766         } else if (!strcasecmp(action, "display_main_menu")) {
 767                 display_main_menu();
 768         } else if (!strcasecmp(action, "advanced")) {
 769                 display_advanced_menu();
 770         } else if (!strcasecmp(action, "whobbs")) {
 771                 whobbs();
 772         } else if (!strcasecmp(action, "knrooms")) {
 773                 list_all_rooms_by_floor();
 774         } else if (!strcasecmp(action, "gotonext")) {
 775                 slrp_highest();
 776                 gotonext();
 777         } else if (!strcasecmp(action, "skip")) {
 778                 gotonext();
 779         } else if (!strcasecmp(action, "ungoto")) {
 780                 ungoto();
 781         } else if (!strcasecmp(action, "dotgoto")) {
 782                 slrp_highest();
 783                 smart_goto(bstr("room"));
 784         } else if (!strcasecmp(action, "termquit")) {
 785                 do_logout();
 786         } else if (!strcasecmp(action, "readnew")) {
 787                 readloop("readnew");
 788         } else if (!strcasecmp(action, "readold")) {
 789                 readloop("readold");
 790         } else if (!strcasecmp(action, "readfwd")) {
 791                 readloop("readfwd");
 792         } else if (!strcasecmp(action, "headers")) {
 793                 readloop("headers");
 794         } else if (!strcasecmp(action, "display_enter")) {
 795                 display_enter();
 796         } else if (!strcasecmp(action, "post")) {
 797                 post_message();
 798         } else if (!strcasecmp(action, "confirm_delete_msg")) {
 799                 confirm_delete_msg();
 800         } else if (!strcasecmp(action, "delete_msg")) {
 801                 delete_msg();
 802         } else if (!strcasecmp(action, "confirm_move_msg")) {
 803                 confirm_move_msg();
 804         } else if (!strcasecmp(action, "move_msg")) {
 805                 move_msg();
 806         } else if (!strcasecmp(action, "userlist")) {
 807                 userlist();
 808         } else if (!strcasecmp(action, "showuser")) {
 809                 showuser();
 810         } else if (!strcasecmp(action, "display_page")) {
 811                 display_page();
 812         } else if (!strcasecmp(action, "page_user")) {
 813                 page_user();
 814         } else if (!strcasecmp(action, "chat")) {
 815                 do_chat();
 816         } else if (!strcasecmp(action, "display_private")) {
 817                 display_private("", 0);
 818         } else if (!strcasecmp(action, "goto_private")) {
 819                 goto_private();
 820         } else if (!strcasecmp(action, "zapped_list")) {
 821                 zapped_list();
 822         } else if (!strcasecmp(action, "display_zap")) {
 823                 display_zap();
 824         } else if (!strcasecmp(action, "zap")) {
 825                 zap();
 826         } else if (!strcasecmp(action, "display_entroom")) {
 827                 display_entroom();
 828         } else if (!strcasecmp(action, "entroom")) {
 829                 entroom();
 830         } else if (!strcasecmp(action, "display_editroom")) {
 831                 display_editroom();
 832         } else if (!strcasecmp(action, "editroom")) {
 833                 editroom();
 834         } else if (!strcasecmp(action, "display_editinfo")) {
 835                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 836         } else if (!strcasecmp(action, "editinfo")) {
 837                 save_edit("Room info", "EINF 1", 1);
 838         } else if (!strcasecmp(action, "display_editbio")) {
 839                 sprintf(buf, "RBIO %s", WC->wc_username);
 840                 display_edit("Your bio", "NOOP", buf, "editbio");
 841         } else if (!strcasecmp(action, "editbio")) {
 842                 save_edit("Your bio", "EBIO", 0);
 843         } else if (!strcasecmp(action, "confirm_delete_room")) {
 844                 confirm_delete_room();
 845         } else if (!strcasecmp(action, "delete_room")) {
 846                 delete_room();
 847         } else if (!strcasecmp(action, "validate")) {
 848                 validate();
 849         } else if (!strcasecmp(action, "display_editpic")) {
 850                 display_graphics_upload("your photo",
 851                                         "UIMG 0|_userpic_",
 852                                         "/editpic");
 853         } else if (!strcasecmp(action, "editpic")) {
 854                 do_graphics_upload("UIMG 1|_userpic_");
 855         } else if (!strcasecmp(action, "display_editroompic")) {
 856                 display_graphics_upload("the graphic for this room",
 857                                         "UIMG 0|_roompic_",
 858                                         "/editroompic");
 859         } else if (!strcasecmp(action, "editroompic")) {
 860                 do_graphics_upload("UIMG 1|_roompic_");
 861         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 862                 select_floor_to_edit_pic();
 863         } else if (!strcasecmp(action, "display_editfloorpic")) {
 864                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 865                         bstr("which_floor"));
 866                 display_graphics_upload("the graphic for this floor",
 867                                         buf,
 868                                         "/editfloorpic");
 869         } else if (!strcasecmp(action, "editfloorpic")) {
 870                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 871                         bstr("which_floor"));
 872                 do_graphics_upload(buf);
 873         } else if (!strcasecmp(action, "display_reg")) {
 874                 display_reg(0);
 875         } else if (!strcasecmp(action, "register")) {
 876                 register_user();
 877         } else if (!strcasecmp(action, "display_changepw")) {
 878                 display_changepw();
 879         } else if (!strcasecmp(action, "changepw")) {
 880                 changepw();
 881         } else if (!strcasecmp(action, "display_edit_node")) {
 882                 display_edit_node();
 883         } else if (!strcasecmp(action, "display_netconf")) {
 884                 display_netconf();
 885         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 886                 display_confirm_unshare();
 887         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 888                 display_confirm_delete_node();
 889         } else if (!strcasecmp(action, "delete_node")) {
 890                 delete_node();
 891         } else if (!strcasecmp(action, "unshare")) {
 892                 unshare();
 893         } else if (!strcasecmp(action, "display_add_node")) {
 894                 display_add_node();
 895         } else if (!strcasecmp(action, "add_node")) {
 896                 add_node();
 897         } else if (!strcasecmp(action, "display_share")) {
 898                 display_share();
 899         } else if (!strcasecmp(action, "share")) {
 900                 share();
 901         } else if (!strcasecmp(action, "terminate_session")) {
 902                 slrp_highest();
 903                 terminate_session();
 904         } else if (!strcasecmp(action, "edit_me")) {
 905                 edit_me();
 906         } else if (!strcasecmp(action, "display_siteconfig")) {
 907                 display_siteconfig();
 908         } else if (!strcasecmp(action, "page_popup")) {
 909                 page_popup();
 910         } else if (!strcasecmp(action, "siteconfig")) {
 911                 siteconfig();
 912         } else if (!strcasecmp(action, "display_generic")) {
 913                 display_generic();
 914         } else if (!strcasecmp(action, "do_generic")) {
 915                 do_generic();
 916         } else if (!strcasecmp(action, "display_menubar")) {
 917                 display_menubar(1);
 918         } else if (!strcasecmp(action, "diagnostics")) {
 919                 output_headers(1);
 920
 921                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 922                 wprintf("Command: <BR><PRE>\n");
 923                 escputs(cmd);
 924                 wprintf("</PRE><HR>\n");
 925                 wprintf("Variables: <BR><PRE>\n");
 926                 dump_vars();
 927                 wprintf("</PRE><HR>\n");
 928                 wDumpContent(1);
 929         }
 930         /* When all else fais, display the main menu. */
 931         else {
 932                 display_main_menu();
 933         }
 934
 935         fflush(stdout);
 936         if (content != NULL) {
 937                 free(content);
 938                 content = NULL;
 939         }
 940         free_urls();
 941         if (WC->upload_length > 0) {
 942                 free(WC->upload);
 943                 WC->upload_length = 0;
 944         }
 945 }