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 #include "../lib/util/setid.h"
  28
  29 #define MAX_VARIABLES 10000
  30
  31 /* set the expiry on fixed pages */
  32 #define EXPIRY_TIME (60*60*24*7)
  33
  34 #ifdef DEBUG_COMMENTS
  35 extern void print_title(char *fmt, ...);
  36 #endif
  37
  38 struct cgi_var {
  39         char *name;
  40         char *value;
  41 };
  42
  43 static struct cgi_var variables[MAX_VARIABLES];
  44 static int num_variables;
  45 static int content_length;
  46 static int request_post;
  47 static char *query_string;
  48 static const char *baseurl;
  49 static char *pathinfo;
  50 static char *C_user;
  51 static char *C_pass;
  52 static char *C_nonce;
  53 static bool inetd_server;
  54 static bool got_request;
  55
  56 static char *grab_line(FILE *f, int *cl)
  57 {
  58         char *ret = NULL;
  59         int i = 0;
  60         int len = 0;
  61
  62         while ((*cl)) {
  63                 int c;
  64
  65                 if (i == len) {
  66                         char *ret2;
  67                         if (len == 0) len = 1024;
  68                         else len *= 2;
  69                         ret2 = (char *)SMB_REALLOC_KEEP_OLD_ON_ERROR(ret, len);
  70                         if (!ret2) return ret;
  71                         ret = ret2;
  72                 }
  73
  74                 c = fgetc(f);
  75                 (*cl)--;
  76
  77                 if (c == EOF) {
  78                         (*cl) = 0;
  79                         break;
  80                 }
  81
  82                 if (c == '\r') continue;
  83
  84                 if (strchr_m("\n&", c)) break;
  85
  86                 ret[i++] = c;
  87
  88         }
  89
  90         if (ret) {
  91                 ret[i] = 0;
  92         }
  93         return ret;
  94 }
  95
  96 /**
  97  URL encoded strings can have a '+', which should be replaced with a space
  98
  99  (This was in rfc1738_unescape(), but that broke the squid helper)
 100 **/
 101
 102 static void plus_to_space_unescape(char *buf)
 103 {
 104         char *p=buf;
 105
 106         while ((p=strchr_m(p,'+')))
 107                 *p = ' ';
 108 }
 109
 110 /***************************************************************************
 111   load all the variables passed to the CGI program. May have multiple variables
 112   with the same name and the same or different values. Takes a file parameter
 113   for simulating CGI invocation eg loading saved preferences.
 114   ***************************************************************************/
 115 void cgi_load_variables(void)
 116 {
 117         static char *line;
 118         char *p, *s, *tok;
 119         int len, i;
 120         FILE *f = stdin;
 121
 122 #ifdef DEBUG_COMMENTS
 123         char dummy[100]="";
 124         print_title(dummy);
 125         printf("<!== Start dump in cgi_load_variables() %s ==>\n",__FILE__);
 126 #endif
 127
 128         if (!content_length) {
 129                 p = getenv("CONTENT_LENGTH");
 130                 len = p?atoi(p):0;
 131         } else {
 132                 len = content_length;
 133         }
 134
 135
 136         if (len > 0 &&
 137             (request_post ||
 138              ((s=getenv("REQUEST_METHOD")) &&
 139               strequal(s,"POST")))) {
 140                 while (len && (line=grab_line(f, &len))) {
 141                         p = strchr_m(line,'=');
 142                         if (!p) continue;
 143
 144                         *p = 0;
 145
 146                         variables[num_variables].name = SMB_STRDUP(line);
 147                         variables[num_variables].value = SMB_STRDUP(p+1);
 148
 149                         SAFE_FREE(line);
 150
 151                         if (!variables[num_variables].name ||
 152                             !variables[num_variables].value)
 153                                 continue;
 154
 155                         plus_to_space_unescape(variables[num_variables].value);
 156                         rfc1738_unescape(variables[num_variables].value);
 157                         plus_to_space_unescape(variables[num_variables].name);
 158                         rfc1738_unescape(variables[num_variables].name);
 159
 160 #ifdef DEBUG_COMMENTS
 161                         printf("<!== POST var %s has value \"%s\"  ==>\n",
 162                                variables[num_variables].name,
 163                                variables[num_variables].value);
 164 #endif
 165
 166                         num_variables++;
 167                         if (num_variables == MAX_VARIABLES) break;
 168                 }
 169         }
 170
 171         fclose(stdin);
 172         open("/dev/null", O_RDWR);
 173
 174         if ((s=query_string) || (s=getenv("QUERY_STRING"))) {
 175                 char *saveptr;
 176                 for (tok=strtok_r(s, "&;", &saveptr); tok;
 177                      tok=strtok_r(NULL, "&;", &saveptr)) {
 178                         p = strchr_m(tok,'=');
 179                         if (!p) continue;
 180
 181                         *p = 0;
 182
 183                         variables[num_variables].name = SMB_STRDUP(tok);
 184                         variables[num_variables].value = SMB_STRDUP(p+1);
 185
 186                         if (!variables[num_variables].name ||
 187                             !variables[num_variables].value)
 188                                 continue;
 189
 190                         plus_to_space_unescape(variables[num_variables].value);
 191                         rfc1738_unescape(variables[num_variables].value);
 192                         plus_to_space_unescape(variables[num_variables].name);
 193                         rfc1738_unescape(variables[num_variables].name);
 194
 195 #ifdef DEBUG_COMMENTS
 196                         printf("<!== Commandline var %s has value \"%s\"  ==>\n",
 197                                variables[num_variables].name,
 198                                variables[num_variables].value);
 199 #endif
 200                         num_variables++;
 201                         if (num_variables == MAX_VARIABLES) break;
 202                 }
 203
 204         }
 205 #ifdef DEBUG_COMMENTS
 206         printf("<!== End dump in cgi_load_variables() ==>\n");
 207 #endif
 208
 209         /* variables from the client are in UTF-8 - convert them
 210            to our internal unix charset before use */
 211         for (i=0;i<num_variables;i++) {
 212                 TALLOC_CTX *frame = talloc_stackframe();
 213                 char *dest = NULL;
 214                 size_t dest_len;
 215
 216                 convert_string_talloc(frame, CH_UTF8, CH_UNIX,
 217                                variables[i].name, strlen(variables[i].name),
 218                                &dest, &dest_len);
 219                 SAFE_FREE(variables[i].name);
 220                 variables[i].name = SMB_STRDUP(dest ? dest : "");
 221
 222                 dest = NULL;
 223                 convert_string_talloc(frame, CH_UTF8, CH_UNIX,
 224                                variables[i].value, strlen(variables[i].value),
 225                                &dest, &dest_len);
 226                 SAFE_FREE(variables[i].value);
 227                 variables[i].value = SMB_STRDUP(dest ? dest : "");
 228                 TALLOC_FREE(frame);
 229         }
 230 }
 231
 232
 233 /***************************************************************************
 234   find a variable passed via CGI
 235   Doesn't quite do what you think in the case of POST text variables, because
 236   if they exist they might have a value of "" or even " ", depending on the
 237   browser. Also doesn't allow for variables[] containing multiple variables
 238   with the same name and the same or different values.
 239   ***************************************************************************/
 240
 241 const char *cgi_variable(const char *name)
 242 {
 243         int i;
 244
 245         for (i=0;i<num_variables;i++)
 246                 if (strcmp(variables[i].name, name) == 0)
 247                         return variables[i].value;
 248         return NULL;
 249 }
 250
 251 /***************************************************************************
 252  Version of the above that can't return a NULL pointer.
 253 ***************************************************************************/
 254
 255 const char *cgi_variable_nonull(const char *name)
 256 {
 257         const char *var = cgi_variable(name);
 258         if (var) {
 259                 return var;
 260         } else {
 261                 return "";
 262         }
 263 }
 264
 265 /***************************************************************************
 266 tell a browser about a fatal error in the http processing
 267   ***************************************************************************/
 268 static void cgi_setup_error(const char *err, const char *header, const char *info)
 269 {
 270         if (!got_request) {
 271                 /* damn browsers don't like getting cut off before they give a request */
 272                 char line[1024];
 273                 while (fgets(line, sizeof(line)-1, stdin)) {
 274                         if (strnequal(line,"GET ", 4) ||
 275                             strnequal(line,"POST ", 5) ||
 276                             strnequal(line,"PUT ", 4)) {
 277                                 break;
 278                         }
 279                 }
 280         }
 281
 282         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);
 283         fclose(stdin);
 284         fclose(stdout);
 285         exit(0);
 286 }
 287
 288
 289 /***************************************************************************
 290 tell a browser about a fatal authentication error
 291   ***************************************************************************/
 292 static void cgi_auth_error(void)
 293 {
 294         if (inetd_server) {
 295                 cgi_setup_error("401 Authorization Required",
 296                                 "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
 297                                 "You must be authenticated to use this service");
 298         } else {
 299                 printf("Content-Type: text/html\r\n");
 300
 301                 printf("\r\n<HTML><HEAD><TITLE>SWAT</TITLE></HEAD>\n");
 302                 printf("<BODY><H1>Installation Error</H1>\n");
 303                 printf("SWAT must be installed via inetd. It cannot be run as a CGI script<p>\n");
 304                 printf("</BODY></HTML>\r\n");
 305         }
 306         exit(0);
 307 }
 308
 309 /***************************************************************************
 310 authenticate when we are running as a CGI
 311   ***************************************************************************/
 312 static void cgi_web_auth(void)
 313 {
 314         const char *user = getenv("REMOTE_USER");
 315         struct passwd *pwd;
 316         const char *head = "Content-Type: text/html\r\n\r\n<HTML><BODY><H1>SWAT installation Error</H1>\n";
 317         const char *tail = "</BODY></HTML>\r\n";
 318
 319         if (!user) {
 320                 printf("%sREMOTE_USER not set. Not authenticated by web server.<br>%s\n",
 321                        head, tail);
 322                 exit(0);
 323         }
 324
 325         pwd = Get_Pwnam_alloc(talloc_tos(), user);
 326         if (!pwd) {
 327                 printf("%sCannot find user %s<br>%s\n", head, user, tail);
 328                 exit(0);
 329         }
 330
 331         C_user = SMB_STRDUP(user);
 332
 333         if (!samba_setuid(0)) {
 334                 C_pass = SMB_STRDUP(cgi_nonce());
 335         }
 336         samba_setuid(pwd->pw_uid);
 337         if (geteuid() != pwd->pw_uid || getuid() != pwd->pw_uid) {
 338                 printf("%sFailed to become user %s - uid=%d/%d<br>%s\n",
 339                        head, user, (int)geteuid(), (int)getuid(), tail);
 340                 exit(0);
 341         }
 342         TALLOC_FREE(pwd);
 343 }
 344
 345
 346 /***************************************************************************
 347 handle a http authentication line
 348   ***************************************************************************/
 349 static bool cgi_handle_authorization(char *line)
 350 {
 351         char *p;
 352         fstring user, user_pass;
 353         struct passwd *pass = NULL;
 354         const char *rhost;
 355         char addr[INET6_ADDRSTRLEN];
 356         size_t size = 0;
 357
 358         if (!strnequal(line,"Basic ", 6)) {
 359                 goto err;
 360         }
 361         line += 6;
 362         while (line[0] == ' ') line++;
 363         base64_decode_inplace(line);
 364         if (!(p=strchr_m(line,':'))) {
 365                 /*
 366                  * Always give the same error so a cracker
 367                  * cannot tell why we fail.
 368                  */
 369                 goto err;
 370         }
 371         *p = 0;
 372
 373         if (!convert_string(CH_UTF8, CH_UNIX,
 374                        line, -1,
 375                        user, sizeof(user), &size)) {
 376                 goto err;
 377         }
 378
 379         if (!convert_string(CH_UTF8, CH_UNIX,
 380                        p+1, -1,
 381                        user_pass, sizeof(user_pass), &size)) {
 382                 goto err;
 383         }
 384
 385         /*
 386          * Try and get the user from the UNIX password file.
 387          */
 388
 389         pass = Get_Pwnam_alloc(talloc_tos(), user);
 390
 391         rhost = client_name(1);
 392         if (strequal(rhost,"UNKNOWN"))
 393                 rhost = client_addr(1, addr, sizeof(addr));
 394
 395         /*
 396          * Validate the password they have given.
 397          */
 398
 399         if NT_STATUS_IS_OK(pass_check(pass, user, rhost, user_pass, false)) {
 400                 if (pass) {
 401                         /*
 402                          * Password was ok.
 403                          */
 404
 405                         if ( initgroups(pass->pw_name, pass->pw_gid) != 0 )
 406                                 goto err;
 407
 408                         become_user_permanently(pass->pw_uid, pass->pw_gid);
 409
 410                         /* Save the users name */
 411                         C_user = SMB_STRDUP(user);
 412                         C_pass = SMB_STRDUP(user_pass);
 413                         TALLOC_FREE(pass);
 414                         return True;
 415                 }
 416         }
 417
 418 err:
 419         cgi_setup_error("401 Bad Authorization",
 420                         "WWW-Authenticate: Basic realm=\"SWAT\"\r\n",
 421                         "username or password incorrect");
 422
 423         TALLOC_FREE(pass);
 424         return False;
 425 }
 426
 427 /***************************************************************************
 428 is this root?
 429   ***************************************************************************/
 430 bool am_root(void)
 431 {
 432         if (geteuid() == 0) {
 433                 return( True);
 434         } else {
 435                 return( False);
 436         }
 437 }
 438
 439 /***************************************************************************
 440 return a ptr to the users name
 441   ***************************************************************************/
 442 char *cgi_user_name(void)
 443 {
 444         return(C_user);
 445 }
 446
 447 /***************************************************************************
 448 return a ptr to the users password
 449   ***************************************************************************/
 450 char *cgi_user_pass(void)
 451 {
 452         return(C_pass);
 453 }
 454
 455 /***************************************************************************
 456 return a ptr to the nonce
 457   ***************************************************************************/
 458 char *cgi_nonce(void)
 459 {
 460         const char *head = "Content-Type: text/html\r\n\r\n<HTML><BODY><H1>SWAT installation Error</H1>\n";
 461         const char *tail = "</BODY></HTML>\r\n";
 462         C_nonce = secrets_fetch_generic("root", "SWAT");
 463         if (C_nonce == NULL) {
 464                 char *tmp_pass = NULL;
 465                 tmp_pass = generate_random_password(talloc_tos(), 16, 16);
 466                 if (tmp_pass == NULL) {
 467                         printf("%sFailed to create random nonce for "
 468                                "SWAT session\n<br>%s\n", head, tail);
 469                         exit(0);
 470                 }
 471                 secrets_store_generic("root", "SWAT", tmp_pass);
 472                 C_nonce = SMB_STRDUP(tmp_pass);
 473                 TALLOC_FREE(tmp_pass);
 474         }
 475         return(C_nonce);
 476 }
 477
 478 /***************************************************************************
 479 handle a file download
 480   ***************************************************************************/
 481 static void cgi_download(char *file)
 482 {
 483         SMB_STRUCT_STAT st;
 484         char buf[1024];
 485         int fd, l, i;
 486         char *p;
 487         char *lang;
 488
 489         /* sanitise the filename */
 490         for (i=0;file[i];i++) {
 491                 if (!isalnum((int)file[i]) && !strchr_m("/.-_", file[i])) {
 492                         cgi_setup_error("404 File Not Found","",
 493                                         "Illegal character in filename");
 494                 }
 495         }
 496
 497         if (sys_stat(file, &st, false) != 0)    {
 498                 cgi_setup_error("404 File Not Found","",
 499                                 "The requested file was not found");
 500         }
 501
 502         if (S_ISDIR(st.st_ex_mode))
 503         {
 504                 snprintf(buf, sizeof(buf), "%s/index.html", file);
 505                 if (!file_exist_stat(buf, &st, false)
 506                     || !S_ISREG(st.st_ex_mode))
 507                 {
 508                         cgi_setup_error("404 File Not Found","",
 509                                         "The requested file was not found");
 510                 }
 511         }
 512         else if (S_ISREG(st.st_ex_mode))
 513         {
 514                 snprintf(buf, sizeof(buf), "%s", file);
 515         }
 516         else
 517         {
 518                 cgi_setup_error("404 File Not Found","",
 519                                 "The requested file was not found");
 520         }
 521
 522         fd = web_open(buf,O_RDONLY,0);
 523         if (fd == -1) {
 524                 cgi_setup_error("404 File Not Found","",
 525                                 "The requested file was not found");
 526         }
 527         printf("HTTP/1.0 200 OK\r\n");
 528         if ((p=strrchr_m(buf, '.'))) {
 529                 if (strcmp(p,".gif")==0) {
 530                         printf("Content-Type: image/gif\r\n");
 531                 } else if (strcmp(p,".jpg")==0) {
 532                         printf("Content-Type: image/jpeg\r\n");
 533                 } else if (strcmp(p,".png")==0) {
 534                         printf("Content-Type: image/png\r\n");
 535                 } else if (strcmp(p,".css")==0) {
 536                         printf("Content-Type: text/css\r\n");
 537                 } else if (strcmp(p,".txt")==0) {
 538                         printf("Content-Type: text/plain\r\n");
 539                 } else {
 540                         printf("Content-Type: text/html\r\n");
 541                 }
 542         }
 543         printf("Expires: %s\r\n",
 544                    http_timestring(talloc_tos(), time(NULL)+EXPIRY_TIME));
 545
 546         lang = lang_tdb_current();
 547         if (lang) {
 548                 printf("Content-Language: %s\r\n", lang);
 549         }
 550
 551         printf("Content-Length: %d\r\n\r\n", (int)st.st_ex_size);
 552         while ((l=read(fd,buf,sizeof(buf)))>0) {
 553                 if (fwrite(buf, 1, l, stdout) != l) {
 554                         break;
 555                 }
 556         }
 557         close(fd);
 558         exit(0);
 559 }
 560
 561
 562
 563 /* return true if the char* contains ip addrs only.  Used to avoid
 564 name lookup calls */
 565
 566 static bool only_ipaddrs_in_list(const char **list)
 567 {
 568         bool only_ip = true;
 569
 570         if (!list) {
 571                 return true;
 572         }
 573
 574         for (; *list ; list++) {
 575                 /* factor out the special strings */
 576                 if (strequal(*list, "ALL") || strequal(*list, "FAIL") ||
 577                     strequal(*list, "EXCEPT")) {
 578                         continue;
 579                 }
 580
 581                 if (!is_ipaddress(*list)) {
 582                         /*
 583                          * If we failed, make sure that it was not because
 584                          * the token was a network/netmask pair. Only
 585                          * network/netmask pairs have a '/' in them.
 586                          */
 587                         if ((strchr_m(*list, '/')) == NULL) {
 588                                 only_ip = false;
 589                                 DEBUG(3,("only_ipaddrs_in_list: list has "
 590                                         "non-ip address (%s)\n",
 591                                         *list));
 592                                 break;
 593                         }
 594                 }
 595         }
 596
 597         return only_ip;
 598 }
 599
 600 /* return true if access should be allowed to a service for a socket */
 601 static bool check_access(int sock, const char **allow_list,
 602                          const char **deny_list)
 603 {
 604         bool ret = false;
 605         bool only_ip = false;
 606         char addr[INET6_ADDRSTRLEN];
 607
 608         if ((!deny_list || *deny_list==0) && (!allow_list || *allow_list==0)) {
 609                 return true;
 610         }
 611
 612         /* Bypass name resolution calls if the lists
 613          * only contain IP addrs */
 614         if (only_ipaddrs_in_list(allow_list) &&
 615             only_ipaddrs_in_list(deny_list)) {
 616                 only_ip = true;
 617                 DEBUG (3, ("check_access: no hostnames "
 618                            "in host allow/deny list.\n"));
 619                 ret = allow_access(deny_list,
 620                                    allow_list,
 621                                    "",
 622                                    get_peer_addr(sock,addr,sizeof(addr)));
 623         } else {
 624                 DEBUG (3, ("check_access: hostnames in "
 625                            "host allow/deny list.\n"));
 626                 ret = allow_access(deny_list,
 627                                    allow_list,
 628                                    get_peer_name(sock,true),
 629                                    get_peer_addr(sock,addr,sizeof(addr)));
 630         }
 631
 632         if (ret) {
 633                 DEBUG(2,("Allowed connection from %s (%s)\n",
 634                          only_ip ? "" : get_peer_name(sock,true),
 635                          get_peer_addr(sock,addr,sizeof(addr))));
 636         } else {
 637                 DEBUG(0,("Denied connection from %s (%s)\n",
 638                          only_ip ? "" : get_peer_name(sock,true),
 639                          get_peer_addr(sock,addr,sizeof(addr))));
 640         }
 641
 642         return(ret);
 643 }
 644
 645 /**
 646  * @brief Setup the CGI framework.
 647  *
 648  * Setup the cgi framework, handling the possibility that this program
 649  * is either run as a true CGI program with a gateway to a web server, or
 650  * is itself a mini web server.
 651  **/
 652 void cgi_setup(const char *rootdir, int auth_required)
 653 {
 654         bool authenticated = False;
 655         char line[1024];
 656         char *url=NULL;
 657         char *p;
 658         char *lang;
 659
 660         if (chdir(rootdir)) {
 661                 cgi_setup_error("500 Server Error", "",
 662                                 "chdir failed - the server is not configured correctly");
 663         }
 664
 665         /* Handle the possibility we might be running as non-root */
 666         sec_init();
 667
 668         if ((lang=getenv("HTTP_ACCEPT_LANGUAGE"))) {
 669                 /* if running as a cgi program */
 670                 web_set_lang(lang);
 671         }
 672
 673         /* maybe we are running under a web server */
 674         if (getenv("CONTENT_LENGTH") || getenv("REQUEST_METHOD")) {
 675                 if (auth_required) {
 676                         cgi_web_auth();
 677                 }
 678                 return;
 679         }
 680
 681         inetd_server = True;
 682
 683         if (!check_access(1, lp_hostsallow(-1), lp_hostsdeny(-1))) {
 684                 cgi_setup_error("403 Forbidden", "",
 685                                 "Samba is configured to deny access from this client\n<br>Check your \"hosts allow\" and \"hosts deny\" options in smb.conf ");
 686         }
 687
 688         /* we are a mini-web server. We need to read the request from stdin
 689            and handle authentication etc */
 690         while (fgets(line, sizeof(line)-1, stdin)) {
 691                 if (line[0] == '\r' || line[0] == '\n') break;
 692                 if (strnequal(line,"GET ", 4)) {
 693                         got_request = True;
 694                         url = SMB_STRDUP(&line[4]);
 695                 } else if (strnequal(line,"POST ", 5)) {
 696                         got_request = True;
 697                         request_post = 1;
 698                         url = SMB_STRDUP(&line[5]);
 699                 } else if (strnequal(line,"PUT ", 4)) {
 700                         got_request = True;
 701                         cgi_setup_error("400 Bad Request", "",
 702                                         "This server does not accept PUT requests");
 703                 } else if (strnequal(line,"Authorization: ", 15)) {
 704                         authenticated = cgi_handle_authorization(&line[15]);
 705                 } else if (strnequal(line,"Content-Length: ", 16)) {
 706                         content_length = atoi(&line[16]);
 707                 } else if (strnequal(line,"Accept-Language: ", 17)) {
 708                         web_set_lang(&line[17]);
 709                 }
 710                 /* ignore all other requests! */
 711         }
 712
 713         if (auth_required && !authenticated) {
 714                 cgi_auth_error();
 715         }
 716
 717         if (!url) {
 718                 cgi_setup_error("400 Bad Request", "",
 719                                 "You must specify a GET or POST request");
 720         }
 721
 722         /* trim the URL */
 723         if ((p = strchr_m(url,' ')) || (p=strchr_m(url,'\t'))) {
 724                 *p = 0;
 725         }
 726         while (*url && strchr_m("\r\n",url[strlen(url)-1])) {
 727                 url[strlen(url)-1] = 0;
 728         }
 729
 730         /* anything following a ? in the URL is part of the query string */
 731         if ((p=strchr_m(url,'?'))) {
 732                 query_string = p+1;
 733                 *p = 0;
 734         }
 735
 736         string_sub(url, "/swat/", "", 0);
 737
 738         if (url[0] != '/' && strstr(url,"..")==0) {
 739                 cgi_download(url);
 740         }
 741
 742         printf("HTTP/1.0 200 OK\r\nConnection: close\r\n");
 743         printf("Date: %s\r\n", http_timestring(talloc_tos(), time(NULL)));
 744         baseurl = "";
 745         pathinfo = url+1;
 746 }
 747
 748
 749 /***************************************************************************
 750 return the current pages URL
 751   ***************************************************************************/
 752 const char *cgi_baseurl(void)
 753 {
 754         if (inetd_server) {
 755                 return baseurl;
 756         }
 757         return getenv("SCRIPT_NAME");
 758 }
 759
 760 /***************************************************************************
 761 return the current pages path info
 762   ***************************************************************************/
 763 const char *cgi_pathinfo(void)
 764 {
 765         char *r;
 766         if (inetd_server) {
 767                 return pathinfo;
 768         }
 769         r = getenv("PATH_INFO");
 770         if (!r) return "";
 771         if (*r == '/') r++;
 772         return r;
 773 }
 774
 775 /***************************************************************************
 776 return the hostname of the client
 777   ***************************************************************************/
 778 const char *cgi_remote_host(void)
 779 {
 780         if (inetd_server) {
 781                 return get_peer_name(1,False);
 782         }
 783         return getenv("REMOTE_HOST");
 784 }
 785
 786 /***************************************************************************
 787 return the hostname of the client
 788   ***************************************************************************/
 789 const char *cgi_remote_addr(void)
 790 {
 791         if (inetd_server) {
 792                 char addr[INET6_ADDRSTRLEN];
 793                 get_peer_addr(1,addr,sizeof(addr));
 794                 return talloc_strdup(talloc_tos(), addr);
 795         }
 796         return getenv("REMOTE_ADDR");
 797 }
 798
 799
 800 /***************************************************************************
 801 return True if the request was a POST
 802   ***************************************************************************/
 803 bool cgi_waspost(void)
 804 {
 805         if (inetd_server) {
 806                 return request_post;
 807         }
 808         return strequal(getenv("REQUEST_METHOD"), "POST");
 809 }