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