source3/web/cgi.c

   1 /*
   2    some simple CGI helper routines
   3    Copyright (C) Andrew Tridgell 1997-1998
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19
  20 #include "includes.h"
  21 #include "system/passwd.h"
  22 #include "system/filesys.h"
  23 #include "web/swat_proto.h"
  24 #include "intl/lang_tdb.h"
  25 #include "auth.h"
  26 #include "secrets.h"
  27
  28 #define MAX_VARIABLES 10000
  29
  30 /* set the expiry on fixed pages */
  31 #define EXPIRY_TIME (60*60*24*7)
  32
  33 #ifdef DEBUG_COMMENTS
  34 extern void print_title(char *fmt, ...);
  35 #endif
  36
  37 struct cgi_var {
  38         char *name;
  39         char *value;
  40 };
  41
  42 static struct cgi_var variables[MAX_VARIABLES];
  43 static int num_variables;
  44 static int content_length;
  45 static int request_post;
  46 static char *query_string;
  47 static const char *baseurl;
  48 static char *pathinfo;
  49 static char *C_user;
  50 static char *C_pass;
  51 static bool inetd_server;
  52 static bool got_request;
  53
  54 static char *grab_line(FILE *f, int *cl)
  55 {
  56         char *ret = NULL;
  57         int i = 0;
  58         int len = 0;
  59
  60         while ((*cl)) {
  61                 int c;
  62
  63                 if (i == len) {
  64                         char *ret2;
  65                         if (len == 0) len = 1024;
  66                         else len *= 2;
  67                         ret2 = (char *)SMB_REALLOC_KEEP_OLD_ON_ERROR(ret, len);
  68                         if (!ret2) return ret;
  69                         ret = ret2;
  70                 }
  71
  72                 c = fgetc(f);
  73                 (*cl)--;
  74
  75                 if (c == EOF) {
  76                         (*cl) = 0;
  77                         break;
  78                 }
  79
  80                 if (c == '\r') continue;
  81
  82                 if (strchr_m("\n&", c)) break;
  83
  84                 ret[i++] = c;
  85
  86         }
  87
  88         if (ret) {
  89                 ret[i] = 0;
  90         }
  91         return ret;
  92 }
  93
  94 /**
  95  URL encoded strings can have a '+', which should be replaced with a space
  96
  97  (This was in rfc1738_unescape(), but that broke the squid helper)
  98 **/
  99
 100 static void plus_to_space_unescape(char *buf)
 101 {
 102         char *p=buf;
 103
 104         while ((p=strchr_m(p,'+')))
 105                 *p = ' ';
 106 }
 107
 108 /***************************************************************************
 109   load all the variables passed to the CGI program. May have multiple variables
 110   with the same name and the same or different values. Takes a file parameter
 111   for simulating CGI invocation eg loading saved preferences.
 112   ***************************************************************************/
 113 void cgi_load_variables(void)
 114 {
 115         static char *line;
 116         char *p, *s, *tok;
 117         int len, i;
 118         FILE *f = stdin;
 119
 120 #ifdef DEBUG_COMMENTS
 121         char dummy[100]="";
 122         print_title(dummy);
 123         printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
 124 #endif
 125
 126         if (!content_length) {
 127                 p = getenv("CONTENT_LENGTH");
 128                 len = p?atoi(p):0;
 129         } else {
 130                 len = content_length;
 131         }
 132
 133
 134         if (len > 0 &&
 135             (request_post ||
 136              ((s=getenv("REQUEST_METHOD")) &&
 137               strequal(s,"POST")))) {
 138                 while (len && (line=grab_line(f, &len))) {
 139                         p = strchr_m(line,'=');
 140                         if (!p) continue;
 141
 142                         *p = 0;
 143
 144                         variables[num_variables].name = SMB_STRDUP(line);
 145                         variables[num_variables].value = SMB_STRDUP(p+1);
 146
 147                         SAFE_FREE(line);
 148
 149                         if (!variables[num_variables].name ||
 150                             !variables[num_variables].value)
 151                                 continue;
 152
 153                         plus_to_space_unescape(variables[num_variables].value);
 154                         rfc1738_unescape(variables[num_variables].value);
 155                         plus_to_space_unescape(variables[num_variables].name);
 156                         rfc1738_unescape(variables[num_variables].name);
 157
 158 #ifdef DEBUG_COMMENTS
 159                         printf("<!== POST var %s has value \"%s\"  ==>\n",
 160                                variables[num_variables].name,
 161                                variables[num_variables].value);
 162 #endif
 163
 164                         num_variables++;
 165                         if (num_variables == MAX_VARIABLES) break;
 166                 }
 167         }
 168
 169         fclose(stdin);
 170         open("/dev/null", O_RDWR);
 171
 172         if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
 173                 char *saveptr;
 174                 for (tok=strtok_r(s, "&;", &saveptr); tok;
 175                      tok=strtok_r(NULL, "&;", &saveptr)) {
 176                         p = strchr_m(tok,'=');
 177                         if (!p) continue;
 178
 179                         *p = 0;
 180
 181                         variables[num_variables].name = SMB_STRDUP(tok);
 182                         variables[num_variables].value = SMB_STRDUP(p+1);
 183
 184                         if (!variables[num_variables].name ||
 185                             !variables[num_variables].value)
 186                                 continue;
 187
 188                         plus_to_space_unescape(variables[num_variables].value);
 189                         rfc1738_unescape(variables[num_variables].value);
 190                         plus_to_space_unescape(variables[num_variables].name);
 191                         rfc1738_unescape(variables[num_variables].name);
 192
 193 #ifdef DEBUG_COMMENTS
 194                         printf("<!== Commandline var %s has value \"%s\"  ==>\n",
 195                                variables[num_variables].name,
 196                                variables[num_variables].value);
 197 #endif
 198                         num_variables++;
 199                         if (num_variables == MAX_VARIABLES) break;
 200                 }
 201
 202         }
 203 #ifdef DEBUG_COMMENTS
 204         printf("<!== End dump in cgi_load_variables() ==>\n");
 205 #endif
 206
 207         /* variables from the client are in UTF-8 - convert them
 208            to our internal unix charset before use */
 209         for (i=0;i<num_variables;i++) {
 210                 TALLOC_CTX *frame = talloc_stackframe();
 211                 char *dest = NULL;
 212                 size_t dest_len;
 213
 214                 convert_string_talloc(frame, CH_UTF8, CH_UNIX,
 215                                variables[i].name, strlen(variables[i].name),
 216                                &dest, &dest_len);
 217                 SAFE_FREE(variables[i].name);
 218                 variables[i].name = SMB_STRDUP(dest ? dest : "");
 219
 220                 dest = NULL;
 221                 convert_string_talloc(frame, CH_UTF8, CH_UNIX,
 222                                variables[i].value, strlen(variables[i].value),
 223                                &dest, &dest_len);
 224                 SAFE_FREE(variables[i].value);
 225                 variables[i].value = SMB_STRDUP(dest ? dest : "");
 226                 TALLOC_FREE(frame);
 227         }
 228 }
 229
 230
 231 /***************************************************************************
 232   find a variable passed via CGI
 233   Doesn't quite do what you think in the case of POST text variables, because
 234   if they exist they might have a value of "" or even " ", depending on the
 235   browser. Also doesn't allow for variables[] containing multiple variables
 236   with the same name and the same or different values.
 237   ***************************************************************************/
 238
 239 const char *cgi_variable(const char *name)
 240 {
 241         int i;
 242
 243         for (i=0;i<num_variables;i++)
 244                 if (strcmp(variables[i].name, name) == 0)
 245                         return variables[i].value;
 246         return NULL;
 247 }
 248
 249 /***************************************************************************
 250  Version of the above that can't return a NULL pointer.
 251 ***************************************************************************/
 252
 253 const char *cgi_variable_nonull(const char *name)
 254 {
 255         const char *var = cgi_variable(name);
 256         if (var) {
 257                 return var;
 258         } else {
 259                 return "";
 260         }
 261 }
 262
 263 /***************************************************************************
 264 tell a browser about a fatal error in the http processing
 265   ***************************************************************************/
 266 static void cgi_setup_error(const char *err, const char *header, const char *info)
 267 {
 268         if (!got_request) {
 269                 /* damn browsers don't like getting cut off before they give a request */
 270                 char line[1024];
 271                 while (fgets(line, sizeof(line)-1, stdin)) {
 272                         if (strnequal(line,"GET ", 4) ||
 273                             strnequal(line,"POST ", 5) ||
 274                             strnequal(line,"PUT ", 4)) {
 275                                 break;
 276                         }
 277                 }
 278         }
 279
 280         printf("HTTP/1.0 %s\r\n%sConnection: close\r\nContent-Type: text/html\r\n\r\n<HTML><HEAD><TITLE>%s</TITLE></HEAD><BODY><H1>%s</H1>%s<p></BODY></HTML>\r\n\r\n", err, header, err, err, info);
 281         fclose(stdin);
 282         fclose(stdout);
 283         exit(0);
 284 }
 285
 286
 287 /***************************************************************************
 288 tell a browser about a fatal authentication error
 289   ***************************************************************************/
 290 static void cgi_auth_error(void)
 291 {
 292         if (inetd_server) {
 293                 cgi_setup_error("401 Authorization Required",
 294                                 "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
 295                                 "You must be authenticated to use this service");
 296         } else {
 297                 printf("Content-Type: text/html\r\n");
 298
 299                 printf("\r\n<HTML><HEAD><TITLE>SWAT</TITLE></HEAD>\n");
 300                 printf("<BODY><H1>Installation Error</H1>\n");
 301                 printf("SWAT must be installed via inetd. It cannot be run as a CGI script<p>\n");
 302                 printf("</BODY></HTML>\r\n");
 303         }
 304         exit(0);
 305 }
 306
 307 /***************************************************************************
 308 authenticate when we are running as a CGI
 309   ***************************************************************************/
 310 static void cgi_web_auth(void)
 311 {
 312         const char *user = getenv("REMOTE_USER");
 313         struct passwd *pwd;
 314         const char *head = "Content-Type: text/html\r\n\r\n<HTML><BODY><H1>SWAT installation Error</H1>\n";
 315         const char *tail = "</BODY></HTML>\r\n";
 316
 317         if (!user) {
 318                 printf("%sREMOTE_USER not set. Not authenticated by web server.<br>%s\n",
 319                        head, tail);
 320                 exit(0);
 321         }
 322
 323         pwd = Get_Pwnam_alloc(talloc_tos(), user);
 324         if (!pwd) {
 325                 printf("%sCannot find user %s<br>%s\n", head, user, tail);
 326                 exit(0);
 327         }
 328
 329         C_user = SMB_STRDUP(user);
 330
 331         if (!setuid(0)) {
 332                 C_pass = secrets_fetch_generic("root", "SWAT");
 333                 if (C_pass == NULL) {
 334                         char *tmp_pass = NULL;
 335                         tmp_pass = generate_random_password(talloc_tos(),
 336                                                             16, 16);
 337                         if (tmp_pass == NULL) {
 338                                 printf("%sFailed to create random nonce for "
 339                                        "SWAT session\n<br>%s\n", head, tail);
 340                                 exit(0);
 341                         }
 342                         secrets_store_generic("root", "SWAT", tmp_pass);
 343                         C_pass = SMB_STRDUP(tmp_pass);
 344                         TALLOC_FREE(tmp_pass);
 345                 }
 346         }
 347         setuid(pwd->pw_uid);
 348         if (geteuid() != pwd->pw_uid || getuid() != pwd->pw_uid) {
 349                 printf("%sFailed to become user %s - uid=%d/%d<br>%s\n",
 350                        head, user, (int)geteuid(), (int)getuid(), tail);
 351                 exit(0);
 352         }
 353         TALLOC_FREE(pwd);
 354 }
 355
 356
 357 /***************************************************************************
 358 handle a http authentication line
 359   ***************************************************************************/
 360 static bool cgi_handle_authorization(char *line)
 361 {
 362         char *p;
 363         fstring user, user_pass;
 364         struct passwd *pass = NULL;
 365         const char *rhost;
 366         char addr[INET6_ADDRSTRLEN];
 367         size_t size = 0;
 368
 369         if (!strnequal(line,"Basic ", 6)) {
 370                 goto err;
 371         }
 372         line += 6;
 373         while (line[0] == ' ') line++;
 374         base64_decode_inplace(line);
 375         if (!(p=strchr_m(line,':'))) {
 376                 /*
 377                  * Always give the same error so a cracker
 378                  * cannot tell why we fail.
 379                  */
 380                 goto err;
 381         }
 382         *p = 0;
 383
 384         if (!convert_string(CH_UTF8, CH_UNIX,
 385                        line, -1,
 386                        user, sizeof(user), &size)) {
 387                 goto err;
 388         }
 389
 390         if (!convert_string(CH_UTF8, CH_UNIX,
 391                        p+1, -1,
 392                        user_pass, sizeof(user_pass), &size)) {
 393                 goto err;
 394         }
 395
 396         /*
 397          * Try and get the user from the UNIX password file.
 398          */
 399
 400         pass = Get_Pwnam_alloc(talloc_tos(), user);
 401
 402         rhost = client_name(1);
 403         if (strequal(rhost,"UNKNOWN"))
 404                 rhost = client_addr(1, addr, sizeof(addr));
 405
 406         /*
 407          * Validate the password they have given.
 408          */
 409
 410         if NT_STATUS_IS_OK(pass_check(pass, user, rhost, user_pass, false)) {
 411                 if (pass) {
 412                         /*
 413                          * Password was ok.
 414                          */
 415
 416                         if ( initgroups(pass->pw_name, pass->pw_gid) != 0 )
 417                                 goto err;
 418
 419                         become_user_permanently(pass->pw_uid, pass->pw_gid);
 420
 421                         /* Save the users name */
 422                         C_user = SMB_STRDUP(user);
 423                         C_pass = SMB_STRDUP(user_pass);
 424                         TALLOC_FREE(pass);
 425                         return True;
 426                 }
 427         }
 428
 429 err:
 430         cgi_setup_error("401 Bad Authorization",
 431                         "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
 432                         "username or password incorrect");
 433
 434         TALLOC_FREE(pass);
 435         return False;
 436 }
 437
 438 /***************************************************************************
 439 is this root?
 440   ***************************************************************************/
 441 bool am_root(void)
 442 {
 443         if (geteuid() == 0) {
 444                 return( True);
 445         } else {
 446                 return( False);
 447         }
 448 }
 449
 450 /***************************************************************************
 451 return a ptr to the users name
 452   ***************************************************************************/
 453 char *cgi_user_name(void)
 454 {
 455         return(C_user);
 456 }
 457
 458 /***************************************************************************
 459 return a ptr to the users password
 460   ***************************************************************************/
 461 char *cgi_user_pass(void)
 462 {
 463         return(C_pass);
 464 }
 465
 466 /***************************************************************************
 467 handle a file download
 468   ***************************************************************************/
 469 static void cgi_download(char *file)
 470 {
 471         SMB_STRUCT_STAT st;
 472         char buf[1024];
 473         int fd, l, i;
 474         char *p;
 475         char *lang;
 476
 477         /* sanitise the filename */
 478         for (i=0;file[i];i++) {
 479                 if (!isalnum((int)file[i]) && !strchr_m("/.-_", file[i])) {
 480                         cgi_setup_error("404 File Not Found","",
 481                                         "Illegal character in filename");
 482                 }
 483         }
 484
 485         if (sys_stat(file, &st, false) != 0)    {
 486                 cgi_setup_error("404 File Not Found","",
 487                                 "The requested file was not found");
 488         }
 489
 490         if (S_ISDIR(st.st_ex_mode))
 491         {
 492                 snprintf(buf, sizeof(buf), "%s/index.html", file);
 493                 if (!file_exist_stat(buf, &st, false)
 494                     || !S_ISREG(st.st_ex_mode))
 495                 {
 496                         cgi_setup_error("404 File Not Found","",
 497                                         "The requested file was not found");
 498                 }
 499         }
 500         else if (S_ISREG(st.st_ex_mode))
 501         {
 502                 snprintf(buf, sizeof(buf), "%s", file);
 503         }
 504         else
 505         {
 506                 cgi_setup_error("404 File Not Found","",
 507                                 "The requested file was not found");
 508         }
 509
 510         fd = web_open(buf,O_RDONLY,0);
 511         if (fd == -1) {
 512                 cgi_setup_error("404 File Not Found","",
 513                                 "The requested file was not found");
 514         }
 515         printf("HTTP/1.0 200 OK\r\n");
 516         if ((p=strrchr_m(buf, '.'))) {
 517                 if (strcmp(p,".gif")==0) {
 518                         printf("Content-Type: image/gif\r\n");
 519                 } else if (strcmp(p,".jpg")==0) {
 520                         printf("Content-Type: image/jpeg\r\n");
 521                 } else if (strcmp(p,".png")==0) {
 522                         printf("Content-Type: image/png\r\n");
 523                 } else if (strcmp(p,".css")==0) {
 524                         printf("Content-Type: text/css\r\n");
 525                 } else if (strcmp(p,".txt")==0) {
 526                         printf("Content-Type: text/plain\r\n");
 527                 } else {
 528                         printf("Content-Type: text/html\r\n");
 529                 }
 530         }
 531         printf("Expires: %s\r\n",
 532                    http_timestring(talloc_tos(), time(NULL)+EXPIRY_TIME));
 533
 534         lang = lang_tdb_current();
 535         if (lang) {
 536                 printf("Content-Language: %s\r\n", lang);
 537         }
 538
 539         printf("Content-Length: %d\r\n\r\n", (int)st.st_ex_size);
 540         while ((l=read(fd,buf,sizeof(buf)))>0) {
 541                 if (fwrite(buf, 1, l, stdout) != l) {
 542                         break;
 543                 }
 544         }
 545         close(fd);
 546         exit(0);
 547 }
 548
 549
 550
 551 /* return true if the char* contains ip addrs only.  Used to avoid
 552 name lookup calls */
 553
 554 static bool only_ipaddrs_in_list(const char **list)
 555 {
 556         bool only_ip = true;
 557
 558         if (!list) {
 559                 return true;
 560         }
 561
 562         for (; *list ; list++) {
 563                 /* factor out the special strings */
 564                 if (strequal(*list, "ALL") || strequal(*list, "FAIL") ||
 565                     strequal(*list, "EXCEPT")) {
 566                         continue;
 567                 }
 568
 569                 if (!is_ipaddress(*list)) {
 570                         /*
 571                          * If we failed, make sure that it was not because
 572                          * the token was a network/netmask pair. Only
 573                          * network/netmask pairs have a '/' in them.
 574                          */
 575                         if ((strchr_m(*list, '/')) == NULL) {
 576                                 only_ip = false;
 577                                 DEBUG(3,("only_ipaddrs_in_list: list has "
 578                                         "non-ip address (%s)\n",
 579                                         *list));
 580                                 break;
 581                         }
 582                 }
 583         }
 584
 585         return only_ip;
 586 }
 587
 588 /* return true if access should be allowed to a service for a socket */
 589 static bool check_access(int sock, const char **allow_list,
 590                          const char **deny_list)
 591 {
 592         bool ret = false;
 593         bool only_ip = false;
 594         char addr[INET6_ADDRSTRLEN];
 595
 596         if ((!deny_list || *deny_list==0) && (!allow_list || *allow_list==0)) {
 597                 return true;
 598         }
 599
 600         /* Bypass name resolution calls if the lists
 601          * only contain IP addrs */
 602         if (only_ipaddrs_in_list(allow_list) &&
 603             only_ipaddrs_in_list(deny_list)) {
 604                 only_ip = true;
 605                 DEBUG (3, ("check_access: no hostnames "
 606                            "in host allow/deny list.\n"));
 607                 ret = allow_access(deny_list,
 608                                    allow_list,
 609                                    "",
 610                                    get_peer_addr(sock,addr,sizeof(addr)));
 611         } else {
 612                 DEBUG (3, ("check_access: hostnames in "
 613                            "host allow/deny list.\n"));
 614                 ret = allow_access(deny_list,
 615                                    allow_list,
 616                                    get_peer_name(sock,true),
 617                                    get_peer_addr(sock,addr,sizeof(addr)));
 618         }
 619
 620         if (ret) {
 621                 DEBUG(2,("Allowed connection from %s (%s)\n",
 622                          only_ip ? "" : get_peer_name(sock,true),
 623                          get_peer_addr(sock,addr,sizeof(addr))));
 624         } else {
 625                 DEBUG(0,("Denied connection from %s (%s)\n",
 626                          only_ip ? "" : get_peer_name(sock,true),
 627                          get_peer_addr(sock,addr,sizeof(addr))));
 628         }
 629
 630         return(ret);
 631 }
 632
 633 /**
 634  * @brief Setup the CGI framework.
 635  *
 636  * Setup the cgi framework, handling the possibility that this program
 637  * is either run as a true CGI program with a gateway to a web server, or
 638  * is itself a mini web server.
 639  **/
 640 void cgi_setup(const char *rootdir, int auth_required)
 641 {
 642         bool authenticated = False;
 643         char line[1024];
 644         char *url=NULL;
 645         char *p;
 646         char *lang;
 647
 648         if (chdir(rootdir)) {
 649                 cgi_setup_error("500 Server Error", "",
 650                                 "chdir failed - the server is not configured correctly");
 651         }
 652
 653         /* Handle the possibility we might be running as non-root */
 654         sec_init();
 655
 656         if ((lang=getenv("HTTP_ACCEPT_LANGUAGE"))) {
 657                 /* if running as a cgi program */
 658                 web_set_lang(lang);
 659         }
 660
 661         /* maybe we are running under a web server */
 662         if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
 663                 if (auth_required) {
 664                         cgi_web_auth();
 665                 }
 666                 return;
 667         }
 668
 669         inetd_server = True;
 670
 671         if (!check_access(1, lp_hostsallow(-1), lp_hostsdeny(-1))) {
 672                 cgi_setup_error("403 Forbidden", "",
 673                                 "Samba is configured to deny access from this client\n<br>Check your \"hosts allow\" and \"hosts deny\" options in smb.conf ");
 674         }
 675
 676         /* we are a mini-web server. We need to read the request from stdin
 677            and handle authentication etc */
 678         while (fgets(line, sizeof(line)-1, stdin)) {
 679                 if (line[0] == '\r' || line[0] == '\n') break;
 680                 if (strnequal(line,"GET ", 4)) {
 681                         got_request = True;
 682                         url = SMB_STRDUP(&line[4]);
 683                 } else if (strnequal(line,"POST ", 5)) {
 684                         got_request = True;
 685                         request_post = 1;
 686                         url = SMB_STRDUP(&line[5]);
 687                 } else if (strnequal(line,"PUT ", 4)) {
 688                         got_request = True;
 689                         cgi_setup_error("400 Bad Request", "",
 690                                         "This server does not accept PUT requests");
 691                 } else if (strnequal(line,"Authorization: ", 15)) {
 692                         authenticated = cgi_handle_authorization(&line[15]);
 693                 } else if (strnequal(line,"Content-Length: ", 16)) {
 694                         content_length = atoi(&line[16]);
 695                 } else if (strnequal(line,"Accept-Language: ", 17)) {
 696                         web_set_lang(&line[17]);
 697                 }
 698                 /* ignore all other requests! */
 699         }
 700
 701         if (auth_required && !authenticated) {
 702                 cgi_auth_error();
 703         }
 704
 705         if (!url) {
 706                 cgi_setup_error("400 Bad Request", "",
 707                                 "You must specify a GET or POST request");
 708         }
 709
 710         /* trim the URL */
 711         if ((p = strchr_m(url,' ')) || (p=strchr_m(url,'\t'))) {
 712                 *p = 0;
 713         }
 714         while (*url && strchr_m("\r\n",url[strlen(url)-1])) {
 715                 url[strlen(url)-1] = 0;
 716         }
 717
 718         /* anything following a ? in the URL is part of the query string */
 719         if ((p=strchr_m(url,'?'))) {
 720                 query_string = p+1;
 721                 *p = 0;
 722         }
 723
 724         string_sub(url, "/swat/", "", 0);
 725
 726         if (url[0] != '/' && strstr(url,"..")==0) {
 727                 cgi_download(url);
 728         }
 729
 730         printf("HTTP/1.0 200 OK\r\nConnection: close\r\n");
 731         printf("Date: %s\r\n", http_timestring(talloc_tos(), time(NULL)));
 732         baseurl = "";
 733         pathinfo = url+1;
 734 }
 735
 736
 737 /***************************************************************************
 738 return the current pages URL
 739   ***************************************************************************/
 740 const char *cgi_baseurl(void)
 741 {
 742         if (inetd_server) {
 743                 return baseurl;
 744         }
 745         return getenv("SCRIPT_NAME");
 746 }
 747
 748 /***************************************************************************
 749 return the current pages path info
 750   ***************************************************************************/
 751 const char *cgi_pathinfo(void)
 752 {
 753         char *r;
 754         if (inetd_server) {
 755                 return pathinfo;
 756         }
 757         r = getenv("PATH_INFO");
 758         if (!r) return "";
 759         if (*r == '/') r++;
 760         return r;
 761 }
 762
 763 /***************************************************************************
 764 return the hostname of the client
 765   ***************************************************************************/
 766 const char *cgi_remote_host(void)
 767 {
 768         if (inetd_server) {
 769                 return get_peer_name(1,False);
 770         }
 771         return getenv("REMOTE_HOST");
 772 }
 773
 774 /***************************************************************************
 775 return the hostname of the client
 776   ***************************************************************************/
 777 const char *cgi_remote_addr(void)
 778 {
 779         if (inetd_server) {
 780                 char addr[INET6_ADDRSTRLEN];
 781                 get_peer_addr(1,addr,sizeof(addr));
 782                 return talloc_strdup(talloc_tos(), addr);
 783         }
 784         return getenv("REMOTE_ADDR");
 785 }
 786
 787
 788 /***************************************************************************
 789 return True if the request was a POST
 790   ***************************************************************************/
 791 bool cgi_waspost(void)
 792 {
 793         if (inetd_server) {
 794                 return request_post;
 795         }
 796         return strequal(getenv("REQUEST_METHOD"), "POST");
 797 }