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 char *C_nonce;
  52 static bool inetd_server;
  53 static bool got_request;
  54
  55 static char *grab_line(FILE *f, int *cl)
  56 {
  57         char *ret = NULL;
  58         int i = 0;
  59         int len = 0;
  60
  61         while ((*cl)) {
  62                 int c;
  63
  64                 if (i == len) {
  65                         char *ret2;
  66                         if (len == 0) len = 1024;
  67                         else len *= 2;
  68                         ret2 = (char *)SMB_REALLOC_KEEP_OLD_ON_ERROR(ret, len);
  69                         if (!ret2) return ret;
  70                         ret = ret2;
  71                 }
  72
  73                 c = fgetc(f);
  74                 (*cl)--;
  75
  76                 if (c == EOF) {
  77                         (*cl) = 0;
  78                         break;
  79                 }
  80
  81                 if (c == '\r') continue;
  82
  83                 if (strchr_m("\n&", c)) break;
  84
  85                 ret[i++] = c;
  86
  87         }
  88
  89         if (ret) {
  90                 ret[i] = 0;
  91         }
  92         return ret;
  93 }
  94
  95 /**
  96  URL encoded strings can have a '+', which should be replaced with a space
  97
  98  (This was in rfc1738_unescape(), but that broke the squid helper)
  99 **/
 100
 101 static void plus_to_space_unescape(char *buf)
 102 {
 103         char *p=buf;
 104
 105         while ((p=strchr_m(p,'+')))
 106                 *p = ' ';
 107 }
 108
 109 /***************************************************************************
 110   load all the variables passed to the CGI program. May have multiple variables
 111   with the same name and the same or different values. Takes a file parameter
 112   for simulating CGI invocation eg loading saved preferences.
 113   ***************************************************************************/
 114 void cgi_load_variables(void)
 115 {
 116         static char *line;
 117         char *p, *s, *tok;
 118         int len, i;
 119         FILE *f = stdin;
 120
 121 #ifdef DEBUG_COMMENTS
 122         char dummy[100]="";
 123         print_title(dummy);
 124         d_printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
 125 #endif
 126
 127         if (!content_length) {
 128                 p = getenv("CONTENT_LENGTH");
 129                 len = p?atoi(p):0;
 130         } else {
 131                 len = content_length;
 132         }
 133
 134
 135         if (len > 0 &&
 136             (request_post ||
 137              ((s=getenv("REQUEST_METHOD")) &&
 138               strequal(s,"POST")))) {
 139                 while (len && (line=grab_line(f, &len))) {
 140                         p = strchr_m(line,'=');
 141                         if (!p) continue;
 142
 143                         *p = 0;
 144
 145                         variables[num_variables].name = SMB_STRDUP(line);
 146                         variables[num_variables].value = SMB_STRDUP(p+1);
 147
 148                         SAFE_FREE(line);
 149
 150                         if (!variables[num_variables].name ||
 151                             !variables[num_variables].value)
 152                                 continue;
 153
 154                         plus_to_space_unescape(variables[num_variables].value);
 155                         rfc1738_unescape(variables[num_variables].value);
 156                         plus_to_space_unescape(variables[num_variables].name);
 157                         rfc1738_unescape(variables[num_variables].name);
 158
 159 #ifdef DEBUG_COMMENTS
 160                         printf("<!== POST var %s has value \"%s\"  ==>\n",
 161                                variables[num_variables].name,
 162                                variables[num_variables].value);
 163 #endif
 164
 165                         num_variables++;
 166                         if (num_variables == MAX_VARIABLES) break;
 167                 }
 168         }
 169
 170         fclose(stdin);
 171         open("/dev/null", O_RDWR);
 172
 173         if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
 174                 char *saveptr;
 175                 for (tok=strtok_r(s, "&;", &saveptr); tok;
 176                      tok=strtok_r(NULL, "&;", &saveptr)) {
 177                         p = strchr_m(tok,'=');
 178                         if (!p) continue;
 179
 180                         *p = 0;
 181
 182                         variables[num_variables].name = SMB_STRDUP(tok);
 183                         variables[num_variables].value = SMB_STRDUP(p+1);
 184
 185                         if (!variables[num_variables].name ||
 186                             !variables[num_variables].value)
 187                                 continue;
 188
 189                         plus_to_space_unescape(variables[num_variables].value);
 190                         rfc1738_unescape(variables[num_variables].value);
 191                         plus_to_space_unescape(variables[num_variables].name);
 192                         rfc1738_unescape(variables[num_variables].name);
 193
 194 #ifdef DEBUG_COMMENTS
 195                         printf("<!== Commandline var %s has value \"%s\"  ==>\n",
 196                                variables[num_variables].name,
 197                                variables[num_variables].value);
 198 #endif
 199                         num_variables++;
 200                         if (num_variables == MAX_VARIABLES) break;
 201                 }
 202
 203         }
 204 #ifdef DEBUG_COMMENTS
 205         printf("<!== End dump in cgi_load_variables() ==>\n");
 206 #endif
 207
 208         /* variables from the client are in UTF-8 - convert them
 209            to our internal unix charset before use */
 210         for (i=0;i<num_variables;i++) {
 211                 TALLOC_CTX *frame = talloc_stackframe();
 212                 char *dest = NULL;
 213                 size_t dest_len;
 214
 215                 convert_string_talloc(frame, CH_UTF8, CH_UNIX,
 216                                variables[i].name, strlen(variables[i].name),
 217                                &dest, &dest_len, True);
 218                 SAFE_FREE(variables[i].name);
 219                 variables[i].name = SMB_STRDUP(dest ? dest : "");
 220
 221                 dest = NULL;
 222                 convert_string_talloc(frame, CH_UTF8, CH_UNIX,
 223                                variables[i].value, strlen(variables[i].value),
 224                                &dest, &dest_len, True);
 225                 SAFE_FREE(variables[i].value);
 226                 variables[i].value = SMB_STRDUP(dest ? dest : "");
 227                 TALLOC_FREE(frame);
 228         }
 229 }
 230
 231
 232 /***************************************************************************
 233   find a variable passed via CGI
 234   Doesn't quite do what you think in the case of POST text variables, because
 235   if they exist they might have a value of "" or even " ", depending on the
 236   browser. Also doesn't allow for variables[] containing multiple variables
 237   with the same name and the same or different values.
 238   ***************************************************************************/
 239
 240 const char *cgi_variable(const char *name)
 241 {
 242         int i;
 243
 244         for (i=0;i<num_variables;i++)
 245                 if (strcmp(variables[i].name, name) == 0)
 246                         return variables[i].value;
 247         return NULL;
 248 }
 249
 250 /***************************************************************************
 251  Version of the above that can't return a NULL pointer.
 252 ***************************************************************************/
 253
 254 const char *cgi_variable_nonull(const char *name)
 255 {
 256         const char *var = cgi_variable(name);
 257         if (var) {
 258                 return var;
 259         } else {
 260                 return "";
 261         }
 262 }
 263
 264 /***************************************************************************
 265 tell a browser about a fatal error in the http processing
 266   ***************************************************************************/
 267 static void cgi_setup_error(const char *err, const char *header, const char *info)
 268 {
 269         if (!got_request) {
 270                 /* damn browsers don't like getting cut off before they give a request */
 271                 char line[1024];
 272                 while (fgets(line, sizeof(line)-1, stdin)) {
 273                         if (strnequal(line,"GET ", 4) ||
 274                             strnequal(line,"POST ", 5) ||
 275                             strnequal(line,"PUT ", 4)) {
 276                                 break;
 277                         }
 278                 }
 279         }
 280
 281         d_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);
 282         fclose(stdin);
 283         fclose(stdout);
 284         exit(0);
 285 }
 286
 287
 288 /***************************************************************************
 289 tell a browser about a fatal authentication error
 290   ***************************************************************************/
 291 static void cgi_auth_error(void)
 292 {
 293         if (inetd_server) {
 294                 cgi_setup_error("401 Authorization Required",
 295                                 "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
 296                                 "You must be authenticated to use this service");
 297         } else {
 298                 printf("Content-Type: text/html\r\n");
 299
 300                 printf("\r\n<HTML><HEAD><TITLE>SWAT</TITLE></HEAD>\n");
 301                 printf("<BODY><H1>Installation Error</H1>\n");
 302                 printf("SWAT must be installed via inetd. It cannot be run as a CGI script<p>\n");
 303                 printf("</BODY></HTML>\r\n");
 304         }
 305         exit(0);
 306 }
 307
 308 /***************************************************************************
 309 authenticate when we are running as a CGI
 310   ***************************************************************************/
 311 static void cgi_web_auth(void)
 312 {
 313         const char *user = getenv("REMOTE_USER");
 314         struct passwd *pwd;
 315         const char *head = "Content-Type: text/html\r\n\r\n<HTML><BODY><H1>SWAT installation Error</H1>\n";
 316         const char *tail = "</BODY></HTML>\r\n";
 317
 318         if (!user) {
 319                 printf("%sREMOTE_USER not set. Not authenticated by web server.<br>%s\n",
 320                        head, tail);
 321                 exit(0);
 322         }
 323
 324         pwd = Get_Pwnam_alloc(talloc_tos(), user);
 325         if (!pwd) {
 326                 printf("%sCannot find user %s<br>%s\n", head, user, tail);
 327                 exit(0);
 328         }
 329
 330         C_user = SMB_STRDUP(user);
 331
 332         if (!setuid(0)) {
 333                 C_pass = SMB_STRDUP(cgi_nonce());
 334         }
 335         setuid(pwd->pw_uid);
 336         if (geteuid() != pwd->pw_uid || getuid() != pwd->pw_uid) {
 337                 printf("%sFailed to become user %s - uid=%d/%d<br>%s\n",
 338                        head, user, (int)geteuid(), (int)getuid(), tail);
 339                 exit(0);
 340         }
 341         TALLOC_FREE(pwd);
 342 }
 343
 344
 345 /***************************************************************************
 346 handle a http authentication line
 347   ***************************************************************************/
 348 static bool cgi_handle_authorization(char *line)
 349 {
 350         char *p;
 351         fstring user, user_pass;
 352         struct passwd *pass = NULL;
 353         const char *rhost;
 354         char addr[INET6_ADDRSTRLEN];
 355
 356         if (!strnequal(line,"Basic ", 6)) {
 357                 goto err;
 358         }
 359         line += 6;
 360         while (line[0] == ' ') line++;
 361         base64_decode_inplace(line);
 362         if (!(p=strchr_m(line,':'))) {
 363                 /*
 364                  * Always give the same error so a cracker
 365                  * cannot tell why we fail.
 366                  */
 367                 goto err;
 368         }
 369         *p = 0;
 370
 371         convert_string(CH_UTF8, CH_UNIX,
 372                        line, -1,
 373                        user, sizeof(user), True);
 374
 375         convert_string(CH_UTF8, CH_UNIX,
 376                        p+1, -1,
 377                        user_pass, sizeof(user_pass), True);
 378
 379         /*
 380          * Try and get the user from the UNIX password file.
 381          */
 382
 383         pass = Get_Pwnam_alloc(talloc_tos(), user);
 384
 385         rhost = client_name(1);
 386         if (strequal(rhost,"UNKNOWN"))
 387                 rhost = client_addr(1, addr, sizeof(addr));
 388
 389         /*
 390          * Validate the password they have given.
 391          */
 392
 393         if NT_STATUS_IS_OK(pass_check(pass, user, rhost, user_pass, false)) {
 394                 if (pass) {
 395                         /*
 396                          * Password was ok.
 397                          */
 398
 399                         if ( initgroups(pass->pw_name, pass->pw_gid) != 0 )
 400                                 goto err;
 401
 402                         become_user_permanently(pass->pw_uid, pass->pw_gid);
 403
 404                         /* Save the users name */
 405                         C_user = SMB_STRDUP(user);
 406                         C_pass = SMB_STRDUP(user_pass);
 407                         TALLOC_FREE(pass);
 408                         return True;
 409                 }
 410         }
 411
 412 err:
 413         cgi_setup_error("401 Bad Authorization",
 414                         "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
 415                         "username or password incorrect");
 416
 417         TALLOC_FREE(pass);
 418         return False;
 419 }
 420
 421 /***************************************************************************
 422 is this root?
 423   ***************************************************************************/
 424 bool am_root(void)
 425 {
 426         if (geteuid() == 0) {
 427                 return( True);
 428         } else {
 429                 return( False);
 430         }
 431 }
 432
 433 /***************************************************************************
 434 return a ptr to the users name
 435   ***************************************************************************/
 436 char *cgi_user_name(void)
 437 {
 438         return(C_user);
 439 }
 440
 441 /***************************************************************************
 442 return a ptr to the users password
 443   ***************************************************************************/
 444 char *cgi_user_pass(void)
 445 {
 446         return(C_pass);
 447 }
 448
 449 /***************************************************************************
 450 return a ptr to the nonce
 451   ***************************************************************************/
 452 char *cgi_nonce(void)
 453 {
 454         const char *head = "Content-Type: text/html\r\n\r\n<HTML><BODY><H1>SWAT installation Error</H1>\n";
 455         const char *tail = "</BODY></HTML>\r\n";
 456         C_nonce = secrets_fetch_generic("root", "SWAT");
 457         if (C_nonce == NULL) {
 458                 char *tmp_pass = NULL;
 459                 tmp_pass = generate_random_password(talloc_tos(),
 460                                                     16, 16);
 461                 if (tmp_pass == NULL) {
 462                         printf("%sFailed to create random nonce for "
 463                                "SWAT session\n<br>%s\n", head, tail);
 464                         exit(0);
 465                 }
 466                 secrets_store_generic("root", "SWAT", tmp_pass);
 467                 C_nonce = SMB_STRDUP(tmp_pass);
 468                 TALLOC_FREE(tmp_pass);
 469         }
 470         return(C_nonce);
 471 }
 472
 473 /***************************************************************************
 474 handle a file download
 475   ***************************************************************************/
 476 static void cgi_download(char *file)
 477 {
 478         SMB_STRUCT_STAT st;
 479         char buf[1024];
 480         int fd, l, i;
 481         char *p;
 482         char *lang;
 483
 484         /* sanitise the filename */
 485         for (i=0;file[i];i++) {
 486                 if (!isalnum((int)file[i]) && !strchr_m("/.-_", file[i])) {
 487                         cgi_setup_error("404 File Not Found","",
 488                                         "Illegal character in filename");
 489                 }
 490         }
 491
 492         if (sys_stat(file, &st, false) != 0)    {
 493                 cgi_setup_error("404 File Not Found","",
 494                                 "The requested file was not found");
 495         }
 496
 497         if (S_ISDIR(st.st_ex_mode))
 498         {
 499                 snprintf(buf, sizeof(buf), "%s/index.html", file);
 500                 if (!file_exist_stat(buf, &st, false)
 501                     || !S_ISREG(st.st_ex_mode))
 502                 {
 503                         cgi_setup_error("404 File Not Found","",
 504                                         "The requested file was not found");
 505                 }
 506         }
 507         else if (S_ISREG(st.st_ex_mode))
 508         {
 509                 snprintf(buf, sizeof(buf), "%s", file);
 510         }
 511         else
 512         {
 513                 cgi_setup_error("404 File Not Found","",
 514                                 "The requested file was not found");
 515         }
 516
 517         fd = web_open(buf,O_RDONLY,0);
 518         if (fd == -1) {
 519                 cgi_setup_error("404 File Not Found","",
 520                                 "The requested file was not found");
 521         }
 522         printf("HTTP/1.0 200 OK\r\n");
 523         if ((p=strrchr_m(buf, '.'))) {
 524                 if (strcmp(p,".gif")==0) {
 525                         printf("Content-Type: image/gif\r\n");
 526                 } else if (strcmp(p,".jpg")==0) {
 527                         printf("Content-Type: image/jpeg\r\n");
 528                 } else if (strcmp(p,".png")==0) {
 529                         printf("Content-Type: image/png\r\n");
 530                 } else if (strcmp(p,".css")==0) {
 531                         printf("Content-Type: text/css\r\n");
 532                 } else if (strcmp(p,".txt")==0) {
 533                         printf("Content-Type: text/plain\r\n");
 534                 } else {
 535                         printf("Content-Type: text/html\r\n");
 536                 }
 537         }
 538         printf("Expires: %s\r\n",
 539                    http_timestring(talloc_tos(), time(NULL)+EXPIRY_TIME));
 540
 541         lang = lang_tdb_current();
 542         if (lang) {
 543                 printf("Content-Language: %s\r\n", lang);
 544         }
 545
 546         printf("Content-Length: %d\r\n\r\n", (int)st.st_ex_size);
 547         while ((l=read(fd,buf,sizeof(buf)))>0) {
 548                 if (fwrite(buf, 1, l, stdout) != l) {
 549                         break;
 550                 }
 551         }
 552         close(fd);
 553         exit(0);
 554 }
 555
 556
 557
 558 /* return true if the char* contains ip addrs only.  Used to avoid
 559 name lookup calls */
 560
 561 static bool only_ipaddrs_in_list(const char **list)
 562 {
 563         bool only_ip = true;
 564
 565         if (!list) {
 566                 return true;
 567         }
 568
 569         for (; *list ; list++) {
 570                 /* factor out the special strings */
 571                 if (strequal(*list, "ALL") || strequal(*list, "FAIL") ||
 572                     strequal(*list, "EXCEPT")) {
 573                         continue;
 574                 }
 575
 576                 if (!is_ipaddress(*list)) {
 577                         /*
 578                          * If we failed, make sure that it was not because
 579                          * the token was a network/netmask pair. Only
 580                          * network/netmask pairs have a '/' in them.
 581                          */
 582                         if ((strchr_m(*list, '/')) == NULL) {
 583                                 only_ip = false;
 584                                 DEBUG(3,("only_ipaddrs_in_list: list has "
 585                                         "non-ip address (%s)\n",
 586                                         *list));
 587                                 break;
 588                         }
 589                 }
 590         }
 591
 592         return only_ip;
 593 }
 594
 595 /* return true if access should be allowed to a service for a socket */
 596 static bool check_access(int sock, const char **allow_list,
 597                          const char **deny_list)
 598 {
 599         bool ret = false;
 600         bool only_ip = false;
 601         char addr[INET6_ADDRSTRLEN];
 602
 603         if ((!deny_list || *deny_list==0) && (!allow_list || *allow_list==0)) {
 604                 return true;
 605         }
 606
 607         /* Bypass name resolution calls if the lists
 608          * only contain IP addrs */
 609         if (only_ipaddrs_in_list(allow_list) &&
 610             only_ipaddrs_in_list(deny_list)) {
 611                 only_ip = true;
 612                 DEBUG (3, ("check_access: no hostnames "
 613                            "in host allow/deny list.\n"));
 614                 ret = allow_access(deny_list,
 615                                    allow_list,
 616                                    "",
 617                                    get_peer_addr(sock,addr,sizeof(addr)));
 618         } else {
 619                 DEBUG (3, ("check_access: hostnames in "
 620                            "host allow/deny list.\n"));
 621                 ret = allow_access(deny_list,
 622                                    allow_list,
 623                                    get_peer_name(sock,true),
 624                                    get_peer_addr(sock,addr,sizeof(addr)));
 625         }
 626
 627         if (ret) {
 628                 DEBUG(2,("Allowed connection from %s (%s)\n",
 629                          only_ip ? "" : get_peer_name(sock,true),
 630                          get_peer_addr(sock,addr,sizeof(addr))));
 631         } else {
 632                 DEBUG(0,("Denied connection from %s (%s)\n",
 633                          only_ip ? "" : get_peer_name(sock,true),
 634                          get_peer_addr(sock,addr,sizeof(addr))));
 635         }
 636
 637         return(ret);
 638 }
 639
 640 /**
 641  * @brief Setup the CGI framework.
 642  *
 643  * Setup the cgi framework, handling the possibility that this program
 644  * is either run as a true CGI program with a gateway to a web server, or
 645  * is itself a mini web server.
 646  **/
 647 void cgi_setup(const char *rootdir, int auth_required)
 648 {
 649         bool authenticated = False;
 650         char line[1024];
 651         char *url=NULL;
 652         char *p;
 653         char *lang;
 654
 655         if (chdir(rootdir)) {
 656                 cgi_setup_error("500 Server Error", "",
 657                                 "chdir failed - the server is not configured correctly");
 658         }
 659
 660         /* Handle the possibility we might be running as non-root */
 661         sec_init();
 662
 663         if ((lang=getenv("HTTP_ACCEPT_LANGUAGE"))) {
 664                 /* if running as a cgi program */
 665                 web_set_lang(lang);
 666         }
 667
 668         /* maybe we are running under a web server */
 669         if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
 670                 if (auth_required) {
 671                         cgi_web_auth();
 672                 }
 673                 return;
 674         }
 675
 676         inetd_server = True;
 677
 678         if (!check_access(1, lp_hostsallow(-1), lp_hostsdeny(-1))) {
 679                 cgi_setup_error("403 Forbidden", "",
 680                                 "Samba is configured to deny access from this client\n<br>Check your \"hosts allow\" and \"hosts deny\" options in smb.conf ");
 681         }
 682
 683         /* we are a mini-web server. We need to read the request from stdin
 684            and handle authentication etc */
 685         while (fgets(line, sizeof(line)-1, stdin)) {
 686                 if (line[0] == '\r' || line[0] == '\n') break;
 687                 if (strnequal(line,"GET ", 4)) {
 688                         got_request = True;
 689                         url = SMB_STRDUP(&line[4]);
 690                 } else if (strnequal(line,"POST ", 5)) {
 691                         got_request = True;
 692                         request_post = 1;
 693                         url = SMB_STRDUP(&line[5]);
 694                 } else if (strnequal(line,"PUT ", 4)) {
 695                         got_request = True;
 696                         cgi_setup_error("400 Bad Request", "",
 697                                         "This server does not accept PUT requests");
 698                 } else if (strnequal(line,"Authorization: ", 15)) {
 699                         authenticated = cgi_handle_authorization(&line[15]);
 700                 } else if (strnequal(line,"Content-Length: ", 16)) {
 701                         content_length = atoi(&line[16]);
 702                 } else if (strnequal(line,"Accept-Language: ", 17)) {
 703                         web_set_lang(&line[17]);
 704                 }
 705                 /* ignore all other requests! */
 706         }
 707
 708         if (auth_required && !authenticated) {
 709                 cgi_auth_error();
 710         }
 711
 712         if (!url) {
 713                 cgi_setup_error("400 Bad Request", "",
 714                                 "You must specify a GET or POST request");
 715         }
 716
 717         /* trim the URL */
 718         if ((p = strchr_m(url,' ')) || (p=strchr_m(url,'\t'))) {
 719                 *p = 0;
 720         }
 721         while (*url && strchr_m("\r\n",url[strlen(url)-1])) {
 722                 url[strlen(url)-1] = 0;
 723         }
 724
 725         /* anything following a ? in the URL is part of the query string */
 726         if ((p=strchr_m(url,'?'))) {
 727                 query_string = p+1;
 728                 *p = 0;
 729         }
 730
 731         string_sub(url, "/swat/", "", 0);
 732
 733         if (url[0] != '/' && strstr(url,"..")==0) {
 734                 cgi_download(url);
 735         }
 736
 737         printf("HTTP/1.0 200 OK\r\nConnection: close\r\n");
 738         printf("Date: %s\r\n", http_timestring(talloc_tos(), time(NULL)));
 739         baseurl = "";
 740         pathinfo = url+1;
 741 }
 742
 743
 744 /***************************************************************************
 745 return the current pages URL
 746   ***************************************************************************/
 747 const char *cgi_baseurl(void)
 748 {
 749         if (inetd_server) {
 750                 return baseurl;
 751         }
 752         return getenv("SCRIPT_NAME");
 753 }
 754
 755 /***************************************************************************
 756 return the current pages path info
 757   ***************************************************************************/
 758 const char *cgi_pathinfo(void)
 759 {
 760         char *r;
 761         if (inetd_server) {
 762                 return pathinfo;
 763         }
 764         r = getenv("PATH_INFO");
 765         if (!r) return "";
 766         if (*r == '/') r++;
 767         return r;
 768 }
 769
 770 /***************************************************************************
 771 return the hostname of the client
 772   ***************************************************************************/
 773 const char *cgi_remote_host(void)
 774 {
 775         if (inetd_server) {
 776                 return get_peer_name(1,False);
 777         }
 778         return getenv("REMOTE_HOST");
 779 }
 780
 781 /***************************************************************************
 782 return the hostname of the client
 783   ***************************************************************************/
 784 const char *cgi_remote_addr(void)
 785 {
 786         if (inetd_server) {
 787                 char addr[INET6_ADDRSTRLEN];
 788                 get_peer_addr(1,addr,sizeof(addr));
 789                 return talloc_strdup(talloc_tos(), addr);
 790         }
 791         return getenv("REMOTE_ADDR");
 792 }
 793
 794
 795 /***************************************************************************
 796 return True if the request was a POST
 797   ***************************************************************************/
 798 bool cgi_waspost(void)
 799 {
 800         if (inetd_server) {
 801                 return request_post;
 802         }
 803         return strequal(getenv("REQUEST_METHOD"), "POST");
 804 }