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 void escputs1(char *strbuf, int nbsp)
 208 {
 209         int a;
 210
 211         for (a = 0; a < strlen(strbuf); ++a) {
 212                 if (strbuf[a] == '<')
 213                         wprintf("&lt;");
 214                 else if (strbuf[a] == '>')
 215                         wprintf("&gt;");
 216                 else if (strbuf[a] == '&')
 217                         wprintf("&amp;");
 218                 else if (strbuf[a] == '\"')
 219                         wprintf("&quot;");
 220                 else if (strbuf[a] == '\'')
 221                         wprintf("&#39;");
 222                 else if (strbuf[a] == LB)
 223                         wprintf("<");
 224                 else if (strbuf[a] == RB)
 225                         wprintf(">");
 226                 else if (strbuf[a] == QU)
 227                         wprintf("\"");
 228                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 229                         wprintf("&nbsp;");
 230                 } else {
 231                         wprintf("%c", strbuf[a]);
 232                 }
 233         }
 234 }
 235
 236 void escputs(char *strbuf)
 237 {
 238         escputs1(strbuf, 0);
 239 }
 240
 241
 242
 243 char *urlesc(char *strbuf)
 244 {
 245         int a, b, c;
 246         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 247         static char outbuf[512];
 248
 249         strcpy(outbuf, "");
 250
 251         for (a = 0; a < strlen(strbuf); ++a) {
 252                 c = 0;
 253                 for (b = 0; b < strlen(ec); ++b) {
 254                         if (strbuf[a] == ec[b])
 255                                 c = 1;
 256                 }
 257                 b = strlen(outbuf);
 258                 if (c == 1)
 259                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 260                 else
 261                         sprintf(&outbuf[b], "%c", strbuf[a]);
 262         }
 263         return (outbuf);
 264 }
 265
 266 void urlescputs(char *strbuf)
 267 {
 268         wprintf("%s", urlesc(strbuf));
 269 }
 270
 271
 272
 273
 274 /*
 275  * Output all that important stuff that the browser will want to see
 276  *
 277  * control codes:
 278  *
 279  * Bits 0 and 1:
 280  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 281  * 1 = HTTP headers plus the "fake frames" found in most windows.
 282  * 2 = HTTP headers required to terminate the session (unset cookies)
 283  * 3 = HTTP and HTML headers, but no 'fake frames'
 284  *
 285  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 286  */
 287 void output_headers(int controlcode)
 288 {
 289         char cookie[256];
 290         int print_standard_html_head = 0;
 291         int refresh30 = 0;
 292         char httpnow[256];
 293
 294         print_standard_html_head        =       controlcode & 0x03;
 295         refresh30                       =       ((controlcode & 0x04) >> 2);
 296
 297         wprintf("HTTP/1.0 200 OK\n");
 298
 299         httpdate(httpnow, time(NULL));
 300
 301         if (print_standard_html_head > 0) {
 302                 wprintf("Content-type: text/html\n");
 303                 wprintf("Server: %s\n", SERVER);
 304                 wprintf("Connection: close\n");
 305                 wprintf("Pragma: no-cache\n");
 306                 wprintf("Cache-Control: no-store\n");
 307                 wprintf("Date: %s\n"
 308                         "Last-modified: %s\n", httpnow, httpnow);
 309         }
 310         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 311                         WC->wc_password, WC->wc_roomname);
 312         if (print_standard_html_head == 2) {
 313                 wprintf("Set-cookie: webcit=%s\n", unset);
 314         } else {
 315                 wprintf("Set-cookie: webcit=%s\n", cookie);
 316         }
 317
 318         if (print_standard_html_head > 0) {
 319                 wprintf("\n");
 320                 wprintf("<HTML><HEAD><TITLE>");
 321                 escputs(serv_info.serv_humannode);
 322                 wprintf("</TITLE>\n"
 323                         "<META HTTP-EQUIV=\"Expires\" CONTENT=\"0\">\n"
 324                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n");
 325                 if (refresh30) wprintf(
 326                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 327                 wprintf("</HEAD>\n");
 328                 if (WC->ExpressMessages != NULL) {
 329                         wprintf("<SCRIPT language=\"javascript\">\n");
 330                         wprintf("function ExpressMessage() {\n");
 331                         wprintf(" alert(\"");
 332                         escputs(WC->ExpressMessages);
 333                         wprintf("\")\n");
 334                         wprintf(" }\n </SCRIPT>\n");
 335                 }
 336
 337
 338
 339                 /* JavaScript key-based navigation would go here if it
 340                  * were finished
 341                  */
 342
 343                 wprintf("<BODY ");
 344                 if (WC->ExpressMessages != NULL) {
 345                         wprintf("onload=\"ExpressMessage()\" ");
 346                         free(WC->ExpressMessages);
 347                         WC->ExpressMessages = NULL;
 348                 }
 349                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 350
 351
 352         if (print_standard_html_head == 1) {
 353                 wprintf("<A NAME=\"TheTop\"></A>"
 354                         "<TABLE border=0 width=100%>"
 355                         "<TR VALIGN=TOP><TD VALIGN=LEFT CELLPADDING=0>");
 356
 357                 display_menubar(0);
 358
 359                 wprintf("</TD><TD VALIGN=TOP>"
 360                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 361                         "<TD>\n");
 362
 363                 embed_room_banner(NULL);
 364
 365                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 366
 367                 WC->fake_frames = 1;
 368                 }
 369         }
 370 }
 371
 372
 373
 374 void ExpressMessageCat(char *buf) {
 375         if (WC->ExpressMessages == NULL) {
 376                 WC->ExpressMessages = malloc(strlen(buf) + 4);
 377                 strcpy(WC->ExpressMessages, "");
 378         } else {
 379                 WC->ExpressMessages = realloc(WC->ExpressMessages,
 380                         (strlen(WC->ExpressMessages) + strlen(buf) + 4));
 381         }
 382         strcat(WC->ExpressMessages, buf);
 383         strcat(WC->ExpressMessages, "\\n");
 384 }
 385
 386
 387 void check_for_express_messages()
 388 {
 389         char buf[256];
 390
 391         serv_puts("PEXP");
 392         serv_gets(buf);
 393         if (buf[0] == '1') {
 394                 while (serv_gets(buf), strcmp(buf, "000")) {
 395                         ExpressMessageCat(buf);
 396                 }
 397         }
 398 }
 399
 400
 401
 402
 403 void output_static(char *what)
 404 {
 405         char buf[4096];
 406         char datebuf[256];
 407         long thisblock;
 408         FILE *fp;
 409         struct stat statbuf;
 410         off_t bytes;
 411
 412         sprintf(buf, "static/%s", what);
 413         fp = fopen(buf, "rb");
 414         if (fp == NULL) {
 415                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 416                 wprintf("Content-Type: text/plain\n");
 417                 wprintf("\n");
 418                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 419         } else {
 420                 output_headers(0);
 421
 422                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 423                         wprintf("Content-type: image/gif\n");
 424                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 425                         wprintf("Content-type: text/plain\n");
 426                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 427                         wprintf("Content-type: image/jpeg\n");
 428                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 429                         wprintf("Content-type: text/html\n");
 430                 else
 431                         wprintf("Content-type: application/octet-stream\n");
 432
 433                 fstat(fileno(fp), &statbuf);
 434                 bytes = statbuf.st_size;
 435                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 436                 wprintf("Content-length: %ld\n", (long) bytes);
 437
 438                 httpdate(datebuf, time(NULL));
 439                 wprintf("Date: %s\n", datebuf);
 440
 441                 httpdate(datebuf, statbuf.st_mtime);
 442                 wprintf("Last-modified: %s\n", datebuf);
 443
 444                 wprintf("\n");
 445                 while (bytes > 0) {
 446                         thisblock = sizeof(buf);
 447                         if (thisblock > bytes) thisblock = bytes;
 448                         fread(buf, thisblock, 1, fp);
 449                         write(WC->http_sock, buf, thisblock);
 450                         bytes = bytes - thisblock;
 451                 }
 452                 fclose(fp);
 453         }
 454         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 455                 end_webcit_session();
 456         }
 457 }
 458
 459 /*
 460  * When the browser requests an image file from the Citadel server,
 461  * this function is called to transmit it.
 462  */
 463 void output_image()
 464 {
 465         char buf[256];
 466         char xferbuf[4096];
 467         off_t bytes;
 468         off_t thisblock;
 469         off_t accomplished = 0L;
 470
 471
 472         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 473         serv_gets(buf);
 474         if (buf[0] == '2') {
 475                 bytes = extract_long(&buf[4], 0);
 476                 output_headers(0);
 477                 wprintf("Content-type: image/gif\n");
 478                 wprintf("Content-length: %ld\n", (long) bytes);
 479                 wprintf("\n");
 480
 481                 while (bytes > (off_t) 0) {
 482                         thisblock = (off_t) sizeof(xferbuf);
 483                         if (thisblock > bytes)
 484                                 thisblock = bytes;
 485                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 486                         serv_gets(buf);
 487                         if (buf[0] == '6')
 488                                 thisblock = extract_long(&buf[4], 0);
 489                         serv_read(xferbuf, (int) thisblock);
 490                         write(WC->http_sock, xferbuf, thisblock);
 491                         bytes = bytes - thisblock;
 492                         accomplished = accomplished + thisblock;
 493                 }
 494                 serv_puts("CLOS");
 495                 serv_gets(buf);
 496         } else {
 497                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 498                 output_headers(0);
 499                 wprintf("Content-Type: text/plain\n");
 500                 wprintf("\n");
 501                 wprintf("Error retrieving image\n");
 502         }
 503
 504 }
 505
 506
 507 /*
 508  * Convenience functions to display a page containing only a string
 509  */
 510 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 511 {
 512         wprintf("HTTP/1.0 200 OK\n");
 513         output_headers(1);
 514         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 515         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 516         wprintf("<B>%s</B>\n", titlebarmsg);
 517         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 518         escputs(messagetext);
 519
 520         wprintf("<HR>\n");
 521         embed_main_menu();
 522         wDumpContent(1);
 523 }
 524
 525 void display_error(char *errormessage)
 526 {
 527         convenience_page("770000", "Error", errormessage);
 528 }
 529
 530 void display_success(char *successmessage)
 531 {
 532         convenience_page("007700", "OK", successmessage);
 533 }
 534
 535
 536
 537 void extract_action(char *actbuf, char *cmdbuf)
 538 {
 539         int i;
 540
 541         strcpy(actbuf, cmdbuf);
 542         if (!strncasecmp(actbuf, "GET /", 5))
 543                 strcpy(actbuf, &actbuf[5]);
 544         if (!strncasecmp(actbuf, "PUT /", 5))
 545                 strcpy(actbuf, &actbuf[5]);
 546         if (!strncasecmp(actbuf, "POST /", 6))
 547                 strcpy(actbuf, &actbuf[6]);
 548
 549         for (i = 0; i < strlen(actbuf); ++i) {
 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                 if (actbuf[i] == '?') {
 559                         actbuf[i] = 0;
 560                         i = 0;
 561                 }
 562                 if (actbuf[i] == '&') {
 563                         actbuf[i] = 0;
 564                         i = 0;
 565                 }
 566         }
 567 }
 568
 569
 570 void upload_handler(char *name, char *filename, char *encoding,
 571                     void *content, char *cbtype, size_t length)
 572 {
 573
 574         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 575         fprintf(stderr, "    name = %s\n", name);
 576         fprintf(stderr, "filename = %s\n", filename);
 577         fprintf(stderr, "encoding = %s\n", encoding);
 578         fprintf(stderr, "    type = %s\n", cbtype);
 579         fprintf(stderr, "  length = %ld\n", (long)length);
 580
 581         if (strlen(name) > 0) {
 582                 WC->upload = malloc(length);
 583                 if (WC->upload != NULL) {
 584                         WC->upload_length = length;
 585                         memcpy(WC->upload, content, length);
 586                 }
 587         }
 588 }
 589
 590
 591 /*
 592  * Entry point for WebCit transaction
 593  */
 594 void session_loop(struct httprequest *req)
 595 {
 596         char cmd[256];
 597         char action[256];
 598         char buf[256];
 599         int a, b;
 600         int ContentLength = 0;
 601         int BytesRead;
 602         char ContentType[512];
 603         char *content;
 604         struct httprequest *hptr;
 605         char browser_host[256];
 606         char user_agent[256];
 607
 608         /* We stuff these with the values coming from the client cookies,
 609          * so we can use them to reconnect a timed out session if we have to.
 610          */
 611         char c_host[256];
 612         char c_port[256];
 613         char c_username[256];
 614         char c_password[256];
 615         char c_roomname[256];
 616         char cookie[256];
 617
 618         strcpy(c_host, defaulthost);
 619         strcpy(c_port, defaultport);
 620         strcpy(c_username, "");
 621         strcpy(c_password, "");
 622         strcpy(c_roomname, "");
 623
 624         WC->upload_length = 0;
 625         WC->upload = NULL;
 626
 627         hptr = req;
 628         if (hptr == NULL) return;
 629
 630         strcpy(cmd, hptr->line);
 631         hptr = hptr->next;
 632         extract_action(action, cmd);
 633
 634         while (hptr != NULL) {
 635                 strcpy(buf, hptr->line);
 636                 hptr = hptr->next;
 637
 638                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 639                         strcpy(cookie, &buf[15]);
 640                         cookie_to_stuff(cookie, NULL,
 641                                       c_username, c_password, c_roomname);
 642                 }
 643                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 644                         ContentLength = atoi(&buf[16]);
 645                 }
 646                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 647                         strcpy(ContentType, &buf[14]);
 648                 }
 649                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 650                         strcpy(user_agent, &buf[12]);
 651                 }
 652         }
 653
 654         if (ContentLength > 0) {
 655                 fprintf(stderr, "Content length: %d\n", ContentLength);
 656                 content = malloc(ContentLength + 1);
 657                 memset(content, 0, ContentLength+1);
 658                 BytesRead = 0;
 659
 660                 while (BytesRead < ContentLength) {
 661                         a=read(WC->http_sock, &content[BytesRead],
 662                                 ContentLength - BytesRead);
 663                         if (a <= 0) BytesRead = ContentLength;
 664                         else BytesRead += a;
 665                 }
 666
 667                 if (!strncasecmp(ContentType,
 668                               "application/x-www-form-urlencoded", 33)) {
 669                         addurls(content);
 670                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 671                         mime_parser(content, ContentLength, ContentType,
 672                                     *upload_handler);
 673                 }
 674         } else {
 675                 content = NULL;
 676         }
 677
 678         /* If there are variables in the URL, we must grab them now */
 679         for (a = 0; a < strlen(cmd); ++a)
 680                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 681                         for (b = a; b < strlen(cmd); ++b)
 682                                 if (isspace(cmd[b]))
 683                                         cmd[b] = 0;
 684                         addurls(&cmd[a + 1]);
 685                         cmd[a] = 0;
 686                 }
 687         /*
 688          * If we're not connected to a Citadel server, try to hook up the
 689          * connection now.  Preference is given to the host and port specified
 690          * by browser cookies, if cookies have been supplied.
 691          */
 692         if (!WC->connected) {
 693                 if (strlen(bstr("host")) > 0)
 694                         strcpy(c_host, bstr("host"));
 695                 if (strlen(bstr("port")) > 0)
 696                         strcpy(c_port, bstr("port"));
 697
 698                 if (!strcasecmp(c_host, "uds")) {
 699                         /* unix domain socket */
 700                         sprintf(buf, "%s/citadel.socket", c_port);
 701                         WC->serv_sock = uds_connectsock(buf);
 702                 }
 703                 else {
 704                         /* tcp socket */
 705                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 706                 }
 707
 708                 if (WC->serv_sock < 0) {
 709                         do_logout();
 710                 }
 711
 712                 WC->connected = 1;
 713                 serv_gets(buf); /* get the server welcome message */
 714                 locate_host(browser_host, WC->http_sock);
 715                 get_serv_info(browser_host, user_agent);
 716         }
 717         check_for_express_messages();
 718
 719         /*
 720          * If we're not logged in, but we have username and password cookies
 721          * supplied by the browser, try using them to log in.
 722          */
 723         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 724                 serv_printf("USER %s", c_username);
 725                 serv_gets(buf);
 726                 if (buf[0] == '3') {
 727                         serv_printf("PASS %s", c_password);
 728                         serv_gets(buf);
 729                         if (buf[0] == '2') {
 730                                 become_logged_in(c_username, c_password, buf);
 731                         }
 732                 }
 733         }
 734         /*
 735          * If we don't have a current room, but a cookie specifying the
 736          * current room is supplied, make an effort to go there.
 737          */
 738         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 739                 serv_printf("GOTO %s", c_roomname);
 740                 serv_gets(buf);
 741                 if (buf[0] == '2') {
 742                         strcpy(WC->wc_roomname, c_roomname);
 743                 }
 744         }
 745         if (!strcasecmp(action, "static")) {
 746                 strcpy(buf, &cmd[12]);
 747                 for (a = 0; a < strlen(buf); ++a)
 748                         if (isspace(buf[a]))
 749                                 buf[a] = 0;
 750                 output_static(buf);
 751         } else if (!strcasecmp(action, "image")) {
 752                 output_image();
 753         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 754                 do_login();
 755         } else if (!WC->logged_in) {
 756                 display_login(NULL);
 757         }
 758         /* Various commands... */
 759
 760         else if (!strcasecmp(action, "do_welcome")) {
 761                 do_welcome();
 762         } else if (!strcasecmp(action, "display_main_menu")) {
 763                 display_main_menu();
 764         } else if (!strcasecmp(action, "advanced")) {
 765                 display_advanced_menu();
 766         } else if (!strcasecmp(action, "whobbs")) {
 767                 whobbs();
 768         } else if (!strcasecmp(action, "knrooms")) {
 769                 list_all_rooms_by_floor();
 770         } else if (!strcasecmp(action, "gotonext")) {
 771                 slrp_highest();
 772                 gotonext();
 773         } else if (!strcasecmp(action, "skip")) {
 774                 gotonext();
 775         } else if (!strcasecmp(action, "ungoto")) {
 776                 ungoto();
 777         } else if (!strcasecmp(action, "dotgoto")) {
 778                 slrp_highest();
 779                 smart_goto(bstr("room"));
 780         } else if (!strcasecmp(action, "termquit")) {
 781                 do_logout();
 782         } else if (!strcasecmp(action, "readnew")) {
 783                 readloop("readnew");
 784         } else if (!strcasecmp(action, "readold")) {
 785                 readloop("readold");
 786         } else if (!strcasecmp(action, "readfwd")) {
 787                 readloop("readfwd");
 788         } else if (!strcasecmp(action, "display_enter")) {
 789                 display_enter();
 790         } else if (!strcasecmp(action, "post")) {
 791                 post_message();
 792         } else if (!strcasecmp(action, "confirm_delete_msg")) {
 793                 confirm_delete_msg();
 794         } else if (!strcasecmp(action, "delete_msg")) {
 795                 delete_msg();
 796         } else if (!strcasecmp(action, "confirm_move_msg")) {
 797                 confirm_move_msg();
 798         } else if (!strcasecmp(action, "move_msg")) {
 799                 move_msg();
 800         } else if (!strcasecmp(action, "userlist")) {
 801                 userlist();
 802         } else if (!strcasecmp(action, "showuser")) {
 803                 showuser();
 804         } else if (!strcasecmp(action, "display_page")) {
 805                 display_page();
 806         } else if (!strcasecmp(action, "page_user")) {
 807                 page_user();
 808         } else if (!strcasecmp(action, "chat")) {
 809                 do_chat();
 810         } else if (!strcasecmp(action, "display_private")) {
 811                 display_private("", 0);
 812         } else if (!strcasecmp(action, "goto_private")) {
 813                 goto_private();
 814         } else if (!strcasecmp(action, "zapped_list")) {
 815                 zapped_list();
 816         } else if (!strcasecmp(action, "display_zap")) {
 817                 display_zap();
 818         } else if (!strcasecmp(action, "zap")) {
 819                 zap();
 820         } else if (!strcasecmp(action, "display_entroom")) {
 821                 display_entroom();
 822         } else if (!strcasecmp(action, "entroom")) {
 823                 entroom();
 824         } else if (!strcasecmp(action, "display_editroom")) {
 825                 display_editroom();
 826         } else if (!strcasecmp(action, "editroom")) {
 827                 editroom();
 828         } else if (!strcasecmp(action, "display_editinfo")) {
 829                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 830         } else if (!strcasecmp(action, "editinfo")) {
 831                 save_edit("Room info", "EINF 1", 1);
 832         } else if (!strcasecmp(action, "display_editbio")) {
 833                 sprintf(buf, "RBIO %s", WC->wc_username);
 834                 display_edit("Your bio", "NOOP", buf, "editbio");
 835         } else if (!strcasecmp(action, "editbio")) {
 836                 save_edit("Your bio", "EBIO", 0);
 837         } else if (!strcasecmp(action, "confirm_delete_room")) {
 838                 confirm_delete_room();
 839         } else if (!strcasecmp(action, "delete_room")) {
 840                 delete_room();
 841         } else if (!strcasecmp(action, "validate")) {
 842                 validate();
 843         } else if (!strcasecmp(action, "display_editpic")) {
 844                 display_graphics_upload("your photo",
 845                                         "UIMG 0|_userpic_",
 846                                         "/editpic");
 847         } else if (!strcasecmp(action, "editpic")) {
 848                 do_graphics_upload("UIMG 1|_userpic_");
 849         } else if (!strcasecmp(action, "display_editroompic")) {
 850                 display_graphics_upload("the graphic for this room",
 851                                         "UIMG 0|_roompic_",
 852                                         "/editroompic");
 853         } else if (!strcasecmp(action, "editroompic")) {
 854                 do_graphics_upload("UIMG 1|_roompic_");
 855         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 856                 select_floor_to_edit_pic();
 857         } else if (!strcasecmp(action, "display_editfloorpic")) {
 858                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 859                         bstr("which_floor"));
 860                 display_graphics_upload("the graphic for this floor",
 861                                         buf,
 862                                         "/editfloorpic");
 863         } else if (!strcasecmp(action, "editfloorpic")) {
 864                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 865                         bstr("which_floor"));
 866                 do_graphics_upload(buf);
 867         } else if (!strcasecmp(action, "display_reg")) {
 868                 display_reg(0);
 869         } else if (!strcasecmp(action, "register")) {
 870                 register_user();
 871         } else if (!strcasecmp(action, "display_changepw")) {
 872                 display_changepw();
 873         } else if (!strcasecmp(action, "changepw")) {
 874                 changepw();
 875         } else if (!strcasecmp(action, "display_edit_node")) {
 876                 display_edit_node();
 877         } else if (!strcasecmp(action, "display_netconf")) {
 878                 display_netconf();
 879         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 880                 display_confirm_unshare();
 881         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 882                 display_confirm_delete_node();
 883         } else if (!strcasecmp(action, "delete_node")) {
 884                 delete_node();
 885         } else if (!strcasecmp(action, "unshare")) {
 886                 unshare();
 887         } else if (!strcasecmp(action, "display_add_node")) {
 888                 display_add_node();
 889         } else if (!strcasecmp(action, "add_node")) {
 890                 add_node();
 891         } else if (!strcasecmp(action, "display_share")) {
 892                 display_share();
 893         } else if (!strcasecmp(action, "share")) {
 894                 share();
 895         } else if (!strcasecmp(action, "terminate_session")) {
 896                 slrp_highest();
 897                 terminate_session();
 898         } else if (!strcasecmp(action, "edit_me")) {
 899                 edit_me();
 900         } else if (!strcasecmp(action, "display_siteconfig")) {
 901                 display_siteconfig();
 902         } else if (!strcasecmp(action, "siteconfig")) {
 903                 siteconfig();
 904         } else if (!strcasecmp(action, "display_generic")) {
 905                 display_generic();
 906         } else if (!strcasecmp(action, "do_generic")) {
 907                 do_generic();
 908         } else if (!strcasecmp(action, "display_menubar")) {
 909                 display_menubar(1);
 910         } else if (!strcasecmp(action, "diagnostics")) {
 911                 output_headers(1);
 912
 913                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 914                 wprintf("Command: <BR><PRE>\n");
 915                 escputs(cmd);
 916                 wprintf("</PRE><HR>\n");
 917                 wprintf("Variables: <BR><PRE>\n");
 918                 dump_vars();
 919                 wprintf("</PRE><HR>\n");
 920                 wDumpContent(1);
 921         }
 922         /* When all else fais, display the main menu. */
 923         else {
 924                 display_main_menu();
 925         }
 926
 927         fflush(stdout);
 928         if (content != NULL) {
 929                 free(content);
 930                 content = NULL;
 931         }
 932         free_urls();
 933         if (WC->upload_length > 0) {
 934                 free(WC->upload);
 935                 WC->upload_length = 0;
 936         }
 937 }