tools/cachemgr.cc

   1 /*
   2  * DEBUG: section --    CGI Cache Manager
   3  * AUTHOR: Duane Wessels
   4  *
   5  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   6  * ----------------------------------------------------------
   7  *
   8  *  Squid is the result of efforts by numerous individuals from
   9  *  the Internet community; see the CONTRIBUTORS file for full
  10  *  details.   Many organizations have provided support for Squid's
  11  *  development; see the SPONSORS file for full details.  Squid is
  12  *  Copyrighted (C) 2001 by the Regents of the University of
  13  *  California; see the COPYRIGHT file for full details.  Squid
  14  *  incorporates software developed and/or copyrighted by other
  15  *  sources; see the CREDITS file for full details.
  16  *
  17  *  This program is free software; you can redistribute it and/or modify
  18  *  it under the terms of the GNU General Public License as published by
  19  *  the Free Software Foundation; either version 2 of the License, or
  20  *  (at your option) any later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful,
  23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *  GNU General Public License for more details.
  26  *
  27  *  You should have received a copy of the GNU General Public License
  28  *  along with this program; if not, write to the Free Software
  29  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  30  *
  31  */
  32
  33 #include "squid.h"
  34 #include "base64.h"
  35 #include "getfullhostname.h"
  36 #include "html_quote.h"
  37 #include "ip/Address.h"
  38 #include "rfc1123.h"
  39 #include "rfc1738.h"
  40 #include "util.h"
  41
  42 #if HAVE_UNISTD_H
  43 #include <unistd.h>
  44 #endif
  45 #if HAVE_STDIO_H
  46 #include <stdio.h>
  47 #endif
  48 #if HAVE_CTYPE_H
  49 #include <ctype.h>
  50 #endif
  51 #if HAVE_ERRNO_H
  52 #include <errno.h>
  53 #endif
  54 #if HAVE_FCNTL_H
  55 #include <fcntl.h>
  56 #endif
  57 #if HAVE_GRP_H
  58 #include <grp.h>
  59 #endif
  60 #if HAVE_GNUMALLOC_H
  61 #include <gnumalloc.h>
  62 #elif HAVE_MALLOC_H
  63 #include <malloc.h>
  64 #endif
  65 #if HAVE_MEMORY_H
  66 #include <memory.h>
  67 #endif
  68 #if HAVE_NETDB_H
  69 #include <netdb.h>
  70 #endif
  71 #if HAVE_PWD_H
  72 #include <pwd.h>
  73 #endif
  74 #if HAVE_SIGNAL_H
  75 #include <signal.h>
  76 #endif
  77 #if HAVE_TIME_H
  78 #include <time.h>
  79 #endif
  80 #if HAVE_SYS_PARAM_H
  81 #include <sys/param.h>
  82 #endif
  83 #if HAVE_SYS_SOCKET_H
  84 #include <sys/socket.h>
  85 #endif
  86 #if HAVE_NETINET_IN_H
  87 #include <netinet/in.h>
  88 #endif
  89 #if HAVE_ARPA_INET_H
  90 #include <arpa/inet.h>
  91 #endif
  92 #if HAVE_SYS_STAT_H
  93 #include <sys/stat.h>
  94 #endif
  95 #if HAVE_SYS_UN_H
  96 #include <sys/un.h>
  97 #endif
  98 #if HAVE_SYS_WAIT_H
  99 #include <sys/wait.h>
 100 #endif
 101 #if HAVE_LIBC_H
 102 #include <libc.h>
 103 #endif
 104 #if HAVE_STRING_H
 105 #include <string.h>
 106 #endif
 107 #if HAVE_STRINGS_H
 108 #include <strings.h>
 109 #endif
 110 #if HAVE_BSTRING_H
 111 #include <bstring.h>
 112 #endif
 113 #if HAVE_CRYPT_H
 114 #include <crypt.h>
 115 #endif
 116 #if HAVE_FNMATCH_H
 117 extern "C" {
 118 #include <fnmatch.h>
 119 }
 120 #endif
 121
 122
 123 #ifndef DEFAULT_CACHEMGR_CONFIG
 124 #define DEFAULT_CACHEMGR_CONFIG "/etc/squid/cachemgr.conf"
 125 #endif
 126
 127 typedef struct {
 128     char *server;
 129     char *hostname;
 130     int port;
 131     char *action;
 132     char *user_name;
 133     char *passwd;
 134     char *pub_auth;
 135     char *workers;
 136     char *processes;
 137 } cachemgr_request;
 138
 139 /*
 140  * Static variables and constants
 141  */
 142 static const time_t passwd_ttl = 60 * 60 * 3;   /* in sec */
 143 static const char *script_name = "/cgi-bin/cachemgr.cgi";
 144 static const char *progname = NULL;
 145 static time_t now;
 146
 147 /*
 148  * Function prototypes
 149  */
 150 static const char *safe_str(const char *str);
 151 static const char *xstrtok(char **str, char del);
 152 static void print_trailer(void);
 153 static void auth_html(const char *host, int port, const char *user_name);
 154 static void error_html(const char *msg);
 155 static char *menu_url(cachemgr_request * req, const char *action);
 156 static int parse_status_line(const char *sline, const char **statusStr);
 157 static cachemgr_request *read_request(void);
 158 static char *read_get_request(void);
 159 static char *read_post_request(void);
 160
 161 static void make_pub_auth(cachemgr_request * req);
 162 static void decode_pub_auth(cachemgr_request * req);
 163 static void reset_auth(cachemgr_request * req);
 164 static const char *make_auth_header(const cachemgr_request * req);
 165
 166 static int check_target_acl(const char *hostname, int port);
 167
 168 #if _SQUID_MSWIN_
 169 static int s_iInitCount = 0;
 170
 171 int Win32SockInit(void)
 172 {
 173     int iVersionRequested;
 174     WSADATA wsaData;
 175     int err;
 176
 177     if (s_iInitCount > 0) {
 178         ++s_iInitCount;
 179         return (0);
 180     } else if (s_iInitCount < 0)
 181         return (s_iInitCount);
 182
 183     /* s_iInitCount == 0. Do the initailization */
 184     iVersionRequested = MAKEWORD(2, 0);
 185
 186     err = WSAStartup((WORD) iVersionRequested, &wsaData);
 187
 188     if (err) {
 189         s_iInitCount = -1;
 190         return (s_iInitCount);
 191     }
 192
 193     if (LOBYTE(wsaData.wVersion) != 2 ||
 194             HIBYTE(wsaData.wVersion) != 0) {
 195         s_iInitCount = -2;
 196         WSACleanup();
 197         return (s_iInitCount);
 198     }
 199
 200     ++s_iInitCount;
 201     return (s_iInitCount);
 202 }
 203
 204 void Win32SockCleanup(void)
 205 {
 206     if (--s_iInitCount == 0)
 207         WSACleanup();
 208
 209     return;
 210 }
 211
 212 #endif
 213
 214 static const char *
 215 safe_str(const char *str)
 216 {
 217     return str ? str : "";
 218 }
 219
 220 /* relaxed number format */
 221 static int
 222 is_number(const char *str)
 223 {
 224     return strspn(str, "\t -+01234567890./\n") == strlen(str);
 225 }
 226
 227 static const char *
 228 xstrtok(char **str, char del)
 229 {
 230     if (*str) {
 231         char *p = strchr(*str, del);
 232         char *tok = *str;
 233         int len;
 234
 235         if (p) {
 236             *str = p + 1;
 237             *p = '\0';
 238         } else
 239             *str = NULL;
 240
 241         /* trim */
 242         len = strlen(tok);
 243
 244         while (len && xisspace(tok[len - 1]))
 245             tok[--len] = '\0';
 246
 247         while (xisspace(*tok))
 248             ++tok;
 249
 250         return tok;
 251     } else
 252         return "";
 253 }
 254
 255 static void
 256 print_trailer(void)
 257 {
 258     printf("<HR noshade size=\"1px\">\n");
 259     printf("<ADDRESS>\n");
 260     printf("Generated %s, by %s/%s@%s\n",
 261            mkrfc1123(now), progname, VERSION, getfullhostname());
 262     printf("</ADDRESS></BODY></HTML>\n");
 263 }
 264
 265 static void
 266 auth_html(const char *host, int port, const char *user_name)
 267 {
 268     FILE *fp;
 269     int need_host = 1;
 270
 271     if (!user_name)
 272         user_name = "";
 273
 274     if (!host || !strlen(host))
 275         host = "";
 276
 277     fp = fopen("cachemgr.conf", "r");
 278
 279     if (fp == NULL)
 280         fp = fopen(DEFAULT_CACHEMGR_CONFIG, "r");
 281
 282     if (fp == NULL)
 283         printf("X-Error: message=\"Unable to open config %s\"", DEFAULT_CACHEMGR_CONFIG);
 284
 285     printf("Content-Type: text/html\r\n\r\n");
 286
 287     printf("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n");
 288
 289     printf("<HTML><HEAD><TITLE>Cache Manager Interface</TITLE>\n");
 290
 291     printf("<STYLE type=\"text/css\"><!--BODY{background-color:#ffffff;font-family:verdana,sans-serif}--></STYLE>\n");
 292
 293     printf("<script type=\"text/javascript\">\n");
 294     printf("function TS(t, s) {\n");
 295     printf(" var x = new XMLHttpRequest();\n");
 296     printf(" x.open('GET', 'http' + s + '://' + t + '/squid-internal-mgr/', true);\n");
 297     printf(" x.onreadystatechange=function() {\n");
 298     printf("  if (x.readyState==4) {\n");
 299     printf("   if ((x.status>=200 && x.status <= 299) || x.status==401) {\n");
 300     printf("    var v = x.getResponseHeader('Server');\n");
 301     printf("    if (v.substring(0,8) == 'squid/3.' && (v[8]=='H' || parseInt(v.substring(8)) >= 2)) {\n");
 302     printf("     var d = document.getElementById('H' + s + 'mgr');\n");
 303     printf("     if (d.innerHTML == '') d.innerHTML = '<h2>HTTP' + (s=='s'?'S':'') + ' Managed Proxies</h2>';\n");
 304     printf("     d.innerHTML = d.innerHTML + '<p>Host: <a href=\"http' + s + '://' + t + '/squid-internal-mgr/\">' + t + '</a></p>';\n");
 305     printf(" }}}}\n");
 306     printf(" x.send(null);\n");
 307     printf("}\n");
 308     printf("</script>\n");
 309
 310     printf("</HEAD>\n");
 311
 312     printf("<BODY><H1>Cache Manager Interface</H1>\n");
 313
 314     printf("<P>This is a WWW interface to the instrumentation interface\n");
 315
 316     printf("for the Squid object cache.</P>\n");
 317
 318     printf("<HR noshade size=\"1px\">\n");
 319
 320     printf("<div id=\"Hsmgr\"></div>\n");
 321     printf("<div id=\"Hmgr\"></div>\n");
 322     printf("<div id=\"Cmgr\">\n");
 323     printf("<h2>CGI Managed Proxies</h2>\n");
 324     printf("<FORM METHOD=\"POST\" ACTION=\"%s\">\n", script_name);
 325
 326     printf("<TABLE BORDER=\"0\" CELLPADDING=\"10\" CELLSPACING=\"1\">\n");
 327
 328
 329     if (fp != NULL) {
 330         int servers = 0;
 331         char config_line[BUFSIZ];
 332
 333         while (fgets(config_line, BUFSIZ, fp)) {
 334             char *server, *comment;
 335             strtok(config_line, "\r\n");
 336
 337             if (config_line[0] == '#')
 338                 continue;
 339
 340             if (config_line[0] == '\0')
 341                 continue;
 342
 343             if ((server = strtok(config_line, " \t")) == NULL)
 344                 continue;
 345
 346             if (strchr(server, '*') || strchr(server, '[') || strchr(server, '?')) {
 347                 need_host = -1;
 348                 continue;
 349             }
 350
 351             comment = strtok(NULL, "");
 352
 353             if (comment)
 354                 while (*comment == ' ' || *comment == '\t')
 355                     ++comment;
 356
 357             if (!comment || !*comment)
 358                 comment = server;
 359
 360             if (!servers)
 361                 printf("<TR><TH ALIGN=\"left\">Cache Server:</TH><TD><SELECT id=\"server\" NAME=\"server\">\n");
 362
 363             printf("<OPTION VALUE=\"%s\"%s>%s</OPTION>\n", server, (servers || *host) ? "" : " SELECTED", comment);
 364             ++servers;
 365         }
 366
 367         if (servers) {
 368             if (need_host == 1 && !*host)
 369                 need_host = 0;
 370
 371             if (need_host)
 372                 printf("<OPTION VALUE=\"\"%s>Other</OPTION>\n", (*host) ? " SELECTED" : "");
 373
 374             printf("</SELECT></TR>\n");
 375         }
 376
 377         fclose(fp);
 378     }
 379
 380     if (need_host) {
 381         if (need_host == 1 && !*host)
 382             host = "localhost";
 383
 384         printf("<TR><TH ALIGN=\"left\">Cache Host:</TH><TD><INPUT NAME=\"host\" ");
 385
 386         printf("size=\"30\" VALUE=\"%s\"></TD></TR>\n", host);
 387
 388         printf("<TR><TH ALIGN=\"left\">Cache Port:</TH><TD><INPUT NAME=\"port\" ");
 389
 390         printf("size=\"30\" VALUE=\"%d\"></TD></TR>\n", port);
 391     }
 392
 393     printf("<TR><TH ALIGN=\"left\">Manager name:</TH><TD><INPUT NAME=\"user_name\" ");
 394
 395     printf("size=\"30\" VALUE=\"%s\"></TD></TR>\n", user_name);
 396
 397     printf("<TR><TH ALIGN=\"left\">Password:</TH><TD><INPUT TYPE=\"password\" NAME=\"passwd\" ");
 398
 399     printf("size=\"30\" VALUE=\"\"></TD></TR>\n");
 400
 401     printf("</TABLE><BR CLEAR=\"all\">\n");
 402
 403     printf("<INPUT TYPE=\"submit\" VALUE=\"Continue...\">\n");
 404
 405     printf("</FORM></div>\n");
 406
 407     printf("<script type=\"text/javascript\">\n");
 408     printf("var s = document.getElementById(\"server\");\n");
 409     printf("for (var i = 0; i < s.childElementCount; i++) {\n");
 410     printf(" TS(s.children[i].value, '');\n");
 411     printf(" TS(s.children[i].value, 's');\n");
 412     printf("}</script>\n");
 413
 414     print_trailer();
 415 }
 416
 417 static void
 418 error_html(const char *msg)
 419 {
 420     printf("Content-Type: text/html\r\n\r\n");
 421     printf("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n");
 422     printf("<HTML><HEAD><TITLE>Cache Manager Error</TITLE>\n");
 423     printf("<STYLE type=\"text/css\"><!--BODY{background-color:#ffffff;font-family:verdana,sans-serif}--></STYLE></HEAD>\n");
 424     printf("<BODY><H1>Cache Manager Error</H1>\n");
 425     printf("<P>\n%s</P>\n", html_quote(msg));
 426     print_trailer();
 427 }
 428
 429 /* returns http status extracted from status line or -1 on parsing failure */
 430 static int
 431 parse_status_line(const char *sline, const char **statusStr)
 432 {
 433     const char *sp = strchr(sline, ' ');
 434
 435     if (statusStr)
 436         *statusStr = NULL;
 437
 438     if (strncasecmp(sline, "HTTP/", 5) || !sp)
 439         return -1;
 440
 441     while (xisspace(*++sp));
 442     if (!xisdigit(*sp))
 443         return -1;
 444
 445     if (statusStr)
 446         *statusStr = sp;
 447
 448     return atoi(sp);
 449 }
 450
 451 static char *
 452 menu_url(cachemgr_request * req, const char *action)
 453 {
 454     static char url[1024];
 455     snprintf(url, sizeof(url), "%s?host=%s&port=%d&user_name=%s&operation=%s&auth=%s",
 456              script_name,
 457              req->hostname,
 458              req->port,
 459              safe_str(req->user_name),
 460              action,
 461              safe_str(req->pub_auth));
 462     return url;
 463 }
 464
 465 static const char *
 466 munge_menu_line(const char *buf, cachemgr_request * req)
 467 {
 468     char *x;
 469     const char *a;
 470     const char *d;
 471     const char *p;
 472     char *a_url;
 473     char *buf_copy;
 474     static char html[2 * 1024];
 475
 476     if (strlen(buf) < 1)
 477         return buf;
 478
 479     if (*buf != ' ')
 480         return buf;
 481
 482     buf_copy = x = xstrdup(buf);
 483
 484     a = xstrtok(&x, '\t');
 485
 486     d = xstrtok(&x, '\t');
 487
 488     p = xstrtok(&x, '\t');
 489
 490     a_url = xstrdup(menu_url(req, a));
 491
 492     /* no reason to give a url for a disabled action */
 493     if (!strcmp(p, "disabled"))
 494         snprintf(html, sizeof(html), "<LI type=\"circle\">%s (disabled)<A HREF=\"%s\">.</A>\n", d, a_url);
 495     else
 496         /* disable a hidden action (requires a password, but password is not in squid.conf) */
 497         if (!strcmp(p, "hidden"))
 498             snprintf(html, sizeof(html), "<LI type=\"circle\">%s (hidden)<A HREF=\"%s\">.</A>\n", d, a_url);
 499         else
 500             /* disable link if authentication is required and we have no password */
 501             if (!strcmp(p, "protected") && !req->passwd)
 502                 snprintf(html, sizeof(html), "<LI type=\"circle\">%s (requires <a href=\"%s\">authentication</a>)<A HREF=\"%s\">.</A>\n",
 503                          d, menu_url(req, "authenticate"), a_url);
 504             else
 505                 /* highlight protected but probably available entries */
 506                 if (!strcmp(p, "protected"))
 507                     snprintf(html, sizeof(html), "<LI type=\"square\"><A HREF=\"%s\"><font color=\"#FF0000\">%s</font></A>\n",
 508                              a_url, d);
 509
 510     /* public entry or unknown type of protection */
 511                 else
 512                     snprintf(html, sizeof(html), "<LI type=\"disk\"><A HREF=\"%s\">%s</A>\n", a_url, d);
 513
 514     xfree(a_url);
 515
 516     xfree(buf_copy);
 517
 518     return html;
 519 }
 520
 521 static const char *
 522 munge_other_line(const char *buf, cachemgr_request * req)
 523 {
 524     static const char *ttags[] = {"td", "th"};
 525
 526     static char html[4096];
 527     static int table_line_num = 0;
 528     static int next_is_header = 0;
 529     int is_header = 0;
 530     const char *ttag;
 531     char *buf_copy;
 532     char *x, *p;
 533     int l = 0;
 534     /* does it look like a table? */
 535
 536     if (!strchr(buf, '\t') || *buf == '\t') {
 537         /* nope, just text */
 538         snprintf(html, sizeof(html), "%s%s",
 539                  table_line_num ? "</table>\n<pre>" : "", html_quote(buf));
 540         table_line_num = 0;
 541         return html;
 542     }
 543
 544     /* start html table */
 545     if (!table_line_num) {
 546         l += snprintf(html + l, sizeof(html) - l, "</pre><table cellpadding=\"2\" cellspacing=\"1\">\n");
 547         next_is_header = 0;
 548     }
 549
 550     /* remove '\n' */
 551     is_header = (!table_line_num || next_is_header) && !strchr(buf, ':') && !is_number(buf);
 552
 553     ttag = ttags[is_header];
 554
 555     /* record starts */
 556     l += snprintf(html + l, sizeof(html) - l, "<tr>");
 557
 558     /* substitute '\t' */
 559     buf_copy = x = xstrdup(buf);
 560
 561     if ((p = strchr(x, '\n')))
 562         *p = '\0';
 563
 564     while (x && strlen(x)) {
 565         int column_span = 1;
 566         const char *cell = xstrtok(&x, '\t');
 567
 568         while (x && *x == '\t') {
 569             ++column_span;
 570             ++x;
 571         }
 572
 573         l += snprintf(html + l, sizeof(html) - l, "<%s colspan=\"%d\" align=\"%s\">%s</%s>",
 574                       ttag, column_span,
 575                       is_header ? "center" : is_number(cell) ? "right" : "left",
 576                       html_quote(cell), ttag);
 577     }
 578
 579     xfree(buf_copy);
 580     /* record ends */
 581     snprintf(html + l, sizeof(html) - l, "</tr>\n");
 582     next_is_header = is_header && strstr(buf, "\t\t");
 583     ++table_line_num;
 584     return html;
 585 }
 586
 587 static const char *
 588 munge_action_line(const char *_buf, cachemgr_request * req)
 589 {
 590     static char html[2 * 1024];
 591     char *buf = xstrdup(_buf);
 592     char *x = buf;
 593     const char *action, *description;
 594     char *p;
 595
 596     if ((p = strchr(x, '\n')))
 597         *p = '\0';
 598     action = xstrtok(&x, '\t');
 599     description = xstrtok(&x, '\t');
 600     if (!description)
 601         description = action;
 602     if (!action)
 603         return "";
 604     snprintf(html, sizeof(html), " <a href=\"%s\">%s</a>", menu_url(req, action), description);
 605     return html;
 606 }
 607
 608 static int
 609 read_reply(int s, cachemgr_request * req)
 610 {
 611     char buf[4 * 1024];
 612 #if _SQUID_MSWIN_
 613
 614     int reply;
 615     char *tmpfile = tempnam(NULL, "tmp0000");
 616     FILE *fp = fopen(tmpfile, "w+");
 617 #else
 618
 619     FILE *fp = fdopen(s, "r");
 620 #endif
 621     /* interpretation states */
 622     enum {
 623         isStatusLine, isHeaders, isActions, isBodyStart, isBody, isForward, isEof, isForwardEof, isSuccess, isError
 624     } istate = isStatusLine;
 625     int parse_menu = 0;
 626     const char *action = req->action;
 627     const char *statusStr = NULL;
 628     int status = -1;
 629
 630     if (0 == strlen(req->action))
 631         parse_menu = 1;
 632     else if (0 == strcasecmp(req->action, "menu"))
 633         parse_menu = 1;
 634
 635     if (fp == NULL) {
 636 #if _SQUID_MSWIN_
 637         perror(tmpfile);
 638         xfree(tmpfile);
 639 #else
 640
 641         perror("fdopen");
 642 #endif
 643
 644         close(s);
 645         return 1;
 646     }
 647
 648 #if _SQUID_MSWIN_
 649
 650     while ((reply=recv(s, buf , sizeof(buf), 0)) > 0)
 651         fwrite(buf, 1, reply, fp);
 652
 653     rewind(fp);
 654
 655 #endif
 656
 657     if (parse_menu)
 658         action = "menu";
 659
 660     /* read reply interpreting one line at a time depending on state */
 661     while (istate < isEof) {
 662         if (!fgets(buf, sizeof(buf), fp))
 663             istate = istate == isForward ? isForwardEof : isEof;
 664
 665         switch (istate) {
 666
 667         case isStatusLine:
 668             /* get HTTP status */
 669             /* uncomment the following if you want to debug headers */
 670             /* fputs("\r\n\r\n", stdout); */
 671             status = parse_status_line(buf, &statusStr);
 672             istate = status == 200 ? isHeaders : isForward;
 673             /* if cache asks for authentication, we have to reset our info */
 674
 675             if (status == 401 || status == 407) {
 676                 reset_auth(req);
 677                 status = 403;   /* Forbiden, see comments in case isForward: */
 678             }
 679
 680             /* this is a way to pass HTTP status to the Web server */
 681             if (statusStr)
 682                 printf("Status: %d %s", status, statusStr);     /* statusStr has '\n' */
 683
 684             break;
 685
 686         case isHeaders:
 687             /* forward header field */
 688             if (!strcmp(buf, "\r\n")) {         /* end of headers */
 689                 fputs("Content-Type: text/html\r\n", stdout);   /* add our type */
 690                 istate = isBodyStart;
 691             }
 692
 693             if (strncasecmp(buf, "Content-Type:", 13))  /* filter out their type */
 694                 fputs(buf, stdout);
 695
 696             break;
 697
 698         case isBodyStart:
 699             printf("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n");
 700
 701             printf("<HTML><HEAD><TITLE>CacheMgr@%s: %s</TITLE>\n",
 702                    req->hostname, action);
 703
 704             printf("<STYLE type=\"text/css\"><!--BODY{background-color:#ffffff;font-family:verdana,sans-serif}TABLE{background-color:#333333;border:0pt;padding:0pt}TH,TD{background-color:#ffffff;white-space:nowrap}--></STYLE>\n");
 705
 706             printf("</HEAD><BODY>\n");
 707
 708             if (parse_menu) {
 709                 printf("<H2><a href=\"%s\">Cache Manager</a> menu for %s:</H2>",
 710                        menu_url(req, "authenticate"), req->hostname);
 711                 printf("<UL>\n");
 712             } else {
 713                 printf("<P><A HREF=\"%s\">%s</A>\n<HR noshade size=\"1px\">\n",
 714                        menu_url(req, "menu"), "Cache Manager menu");
 715                 printf("<PRE>\n");
 716             }
 717
 718             istate = isActions;
 719             /* yes, fall through, we do not want to loose the first line */
 720
 721         case isActions:
 722             if (strncmp(buf, "action:", 7) == 0) {
 723                 fputs(" ", stdout);
 724                 fputs(munge_action_line(buf + 7, req), stdout);
 725                 break;
 726             }
 727             if (parse_menu) {
 728                 printf("<UL>\n");
 729             } else {
 730                 printf("<HR noshade size=\"1px\">\n");
 731                 printf("<PRE>\n");
 732             }
 733
 734             istate = isBody;
 735             /* yes, fall through, we do not want to loose the first line */
 736
 737         case isBody:
 738             /* interpret [and reformat] cache response */
 739
 740             if (parse_menu)
 741                 fputs(munge_menu_line(buf, req), stdout);
 742             else
 743                 fputs(munge_other_line(buf, req), stdout);
 744
 745             break;
 746
 747         case isForward:
 748             /* forward: no modifications allowed */
 749             /*
 750              * Note: we currently do not know any way to get browser.reply to
 751              * 401 to .cgi because web server filters out all auth info. Thus we
 752              * disable authentication headers for now.
 753              */
 754             if (!strncasecmp(buf, "WWW-Authenticate:", 17) || !strncasecmp(buf, "Proxy-Authenticate:", 19));    /* skip */
 755             else
 756                 fputs(buf, stdout);
 757
 758             break;
 759
 760         case isEof:
 761             /* print trailers */
 762             if (parse_menu)
 763                 printf("</UL>\n");
 764             else
 765                 printf("</table></PRE>\n");
 766
 767             print_trailer();
 768
 769             istate = isSuccess;
 770
 771             break;
 772
 773         case isForwardEof:
 774             /* indicate that we finished processing an "error" sequence */
 775             istate = isError;
 776
 777             break;
 778
 779         default:
 780             printf("%s: internal bug: invalid state reached: %d", script_name, istate);
 781
 782             istate = isError;
 783         }
 784     }
 785
 786     fclose(fp);
 787 #if _SQUID_MSWIN_
 788
 789     remove(tmpfile);
 790     xfree(tmpfile);
 791     close(s);
 792
 793 #endif
 794
 795     return 0;
 796 }
 797
 798 static int
 799 process_request(cachemgr_request * req)
 800 {
 801
 802     char ipbuf[MAX_IPSTRLEN];
 803     struct addrinfo *AI = NULL;
 804     Ip::Address S;
 805     int s;
 806     int l;
 807
 808     static char buf[2 * 1024];
 809
 810     if (req == NULL) {
 811         auth_html(CACHEMGR_HOSTNAME, CACHE_HTTP_PORT, "");
 812         return 1;
 813     }
 814
 815     if (req->hostname == NULL) {
 816         req->hostname = xstrdup(CACHEMGR_HOSTNAME);
 817     }
 818
 819     if (req->port == 0) {
 820         req->port = CACHE_HTTP_PORT;
 821     }
 822
 823     if (req->action == NULL) {
 824         req->action = xstrdup("");
 825     }
 826
 827     if (strcmp(req->action, "authenticate") == 0) {
 828         auth_html(req->hostname, req->port, req->user_name);
 829         return 0;
 830     }
 831
 832     if (!check_target_acl(req->hostname, req->port)) {
 833         snprintf(buf, 1024, "target %s:%d not allowed in cachemgr.conf\n", req->hostname, req->port);
 834         error_html(buf);
 835         return 1;
 836     }
 837
 838     S = *gethostbyname(req->hostname);
 839
 840     if ( !S.IsAnyAddr() ) {
 841         (void) 0;
 842     } else if ((S = req->hostname))
 843         (void) 0;
 844     else {
 845         snprintf(buf, 1024, "Unknown host: %s\n", req->hostname);
 846         error_html(buf);
 847         return 1;
 848     }
 849
 850     S.SetPort(req->port);
 851
 852     S.GetAddrInfo(AI);
 853
 854 #if USE_IPV6
 855     if ((s = socket( AI->ai_family, SOCK_STREAM, 0)) < 0) {
 856 #else
 857     if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
 858 #endif
 859         snprintf(buf, 1024, "socket: %s\n", xstrerror());
 860         error_html(buf);
 861         return 1;
 862     }
 863
 864     if (connect(s, AI->ai_addr, AI->ai_addrlen) < 0) {
 865         snprintf(buf, 1024, "connect %s: %s\n",
 866                  S.ToURL(ipbuf,MAX_IPSTRLEN),
 867                  xstrerror());
 868         error_html(buf);
 869         S.FreeAddrInfo(AI);
 870         return 1;
 871     }
 872
 873     S.FreeAddrInfo(AI);
 874
 875     l = snprintf(buf, sizeof(buf),
 876                  "GET cache_object://%s/%s%s%s HTTP/1.0\r\n"
 877                  "User-Agent: cachemgr.cgi/%s\r\n"
 878                  "Accept: */*\r\n"
 879                  "%s"                   /* Authentication info or nothing */
 880                  "\r\n",
 881                  req->hostname,
 882                  req->action,
 883                  req->workers? "?workers=" : (req->processes ? "?processes=" : ""),
 884                  req->workers? req->workers : (req->processes ? req->processes: ""),
 885                  VERSION,
 886                  make_auth_header(req));
 887     if (write(s, buf, l) < 0) {
 888         fprintf(stderr,"ERROR: (%d) writing request: '%s'\n", errno, buf);
 889     } else {
 890         debug("wrote request: '%s'\n", buf);
 891     }
 892     return read_reply(s, req);
 893 }
 894
 895 int
 896 main(int argc, char *argv[])
 897 {
 898     char *s;
 899     cachemgr_request *req;
 900
 901     now = time(NULL);
 902 #if _SQUID_MSWIN_
 903
 904     Win32SockInit();
 905     atexit(Win32SockCleanup);
 906     _setmode( _fileno( stdin ), _O_BINARY );
 907     _setmode( _fileno( stdout ), _O_BINARY );
 908     _fmode = _O_BINARY;
 909
 910     if ((s = strrchr(argv[0], '\\')))
 911 #else
 912
 913     if ((s = strrchr(argv[0], '/')))
 914 #endif
 915
 916         progname = xstrdup(s + 1);
 917     else
 918         progname = xstrdup(argv[0]);
 919
 920     if ((s = getenv("SCRIPT_NAME")) != NULL)
 921         script_name = xstrdup(s);
 922
 923     char **args = argv;
 924     while (argc > 1 && args[1][0] == '-') {
 925 //        const char *value = "";
 926         char option = args[1][1];
 927         switch (option) {
 928         case 'd':
 929             debug_enabled = 1;
 930             break;
 931         default:
 932 #if 0 // unused for now.
 933             if (strlen(args[1]) > 2) {
 934                 value = args[1] + 2;
 935             } else if (argc > 2) {
 936                 value = args[2];
 937                 ++args;
 938                 --argc;
 939             } else
 940                 value = "";
 941 #endif
 942             break;
 943         }
 944         ++args;
 945         --argc;
 946     }
 947
 948     req = read_request();
 949
 950     return process_request(req);
 951 }
 952
 953 static char *
 954 read_post_request(void)
 955 {
 956     char *s;
 957     char *buf;
 958     int len;
 959
 960     if ((s = getenv("REQUEST_METHOD")) == NULL)
 961         return NULL;
 962
 963     if (0 != strcasecmp(s, "POST"))
 964         return NULL;
 965
 966     if ((s = getenv("CONTENT_LENGTH")) == NULL)
 967         return NULL;
 968
 969     if ((len = atoi(s)) <= 0)
 970         return NULL;
 971
 972     buf = (char *)xmalloc(len + 1);
 973
 974     if (fread(buf, len, 1, stdin) == 0)
 975         return NULL;
 976
 977     buf[len] = '\0';
 978
 979     return buf;
 980 }
 981
 982 static char *
 983 read_get_request(void)
 984 {
 985     char *s;
 986
 987     if ((s = getenv("QUERY_STRING")) == NULL)
 988         return NULL;
 989
 990     return xstrdup(s);
 991 }
 992
 993 static cachemgr_request *
 994 read_request(void)
 995 {
 996     char *buf;
 997
 998     cachemgr_request *req;
 999     char *s;
1000     char *t;
1001     char *q;
1002
1003     if ((buf = read_post_request()) != NULL)
1004         (void) 0;
1005     else if ((buf = read_get_request()) != NULL)
1006         (void) 0;
1007     else
1008         return NULL;
1009
1010 #if _SQUID_MSWIN_
1011
1012     if (strlen(buf) == 0 || strlen(buf) == 4000)
1013 #else
1014
1015     if (strlen(buf) == 0)
1016 #endif
1017     {
1018         xfree(buf);
1019         return NULL;
1020     }
1021
1022     req = (cachemgr_request *)xcalloc(1, sizeof(cachemgr_request));
1023
1024     for (s = strtok(buf, "&"); s != NULL; s = strtok(NULL, "&")) {
1025         t = xstrdup(s);
1026
1027         if ((q = strchr(t, '=')) == NULL)
1028             continue;
1029
1030         *q = '\0';
1031         ++q;
1032
1033         rfc1738_unescape(t);
1034
1035         rfc1738_unescape(q);
1036
1037         if (0 == strcasecmp(t, "server") && strlen(q))
1038             req->server = xstrdup(q);
1039         else if (0 == strcasecmp(t, "host") && strlen(q))
1040             req->hostname = xstrdup(q);
1041         else if (0 == strcasecmp(t, "port") && strlen(q))
1042             req->port = atoi(q);
1043         else if (0 == strcasecmp(t, "user_name") && strlen(q))
1044             req->user_name = xstrdup(q);
1045         else if (0 == strcasecmp(t, "passwd") && strlen(q))
1046             req->passwd = xstrdup(q);
1047         else if (0 == strcasecmp(t, "auth") && strlen(q))
1048             req->pub_auth = xstrdup(q), decode_pub_auth(req);
1049         else if (0 == strcasecmp(t, "operation"))
1050             req->action = xstrdup(q);
1051         else if (0 == strcasecmp(t, "workers") && strlen(q))
1052             req->workers = xstrdup(q);
1053         else if (0 == strcasecmp(t, "processes") && strlen(q))
1054             req->processes = xstrdup(q);
1055     }
1056
1057     if (req->server && !req->hostname) {
1058         char *p;
1059         req->hostname = strtok(req->server, ":");
1060
1061         if ((p = strtok(NULL, ":")))
1062             req->port = atoi(p);
1063     }
1064
1065     make_pub_auth(req);
1066     debug("cmgr: got req: host: '%s' port: %d uname: '%s' passwd: '%s' auth: '%s' oper: '%s' workers: '%s' processes: '%s'\n",
1067           safe_str(req->hostname), req->port, safe_str(req->user_name), safe_str(req->passwd), safe_str(req->pub_auth), safe_str(req->action), safe_str(req->workers), safe_str(req->processes));
1068     return req;
1069 }
1070
1071
1072 /* Routines to support authentication */
1073
1074 /*
1075  * Encodes auth info into a "public" form.
1076  * Currently no powerful encryption is used.
1077  */
1078 static void
1079 make_pub_auth(cachemgr_request * req)
1080 {
1081     static char buf[1024];
1082     safe_free(req->pub_auth);
1083     debug("cmgr: encoding for pub...\n");
1084
1085     if (!req->passwd || !strlen(req->passwd))
1086         return;
1087
1088     /* host | time | user | passwd */
1089     const int bufLen = snprintf(buf, sizeof(buf), "%s|%d|%s|%s",
1090                                 req->hostname,
1091                                 (int) now,
1092                                 req->user_name ? req->user_name : "",
1093                                 req->passwd);
1094     debug("cmgr: pre-encoded for pub: %s\n", buf);
1095
1096     const int encodedLen = base64_encode_len(bufLen);
1097     req->pub_auth = (char *) xmalloc(encodedLen);
1098     base64_encode_str(req->pub_auth, encodedLen, buf, bufLen);
1099     debug("cmgr: encoded: '%s'\n", req->pub_auth);
1100 }
1101
1102 static void
1103 decode_pub_auth(cachemgr_request * req)
1104 {
1105     char *buf;
1106     const char *host_name;
1107     const char *time_str;
1108     const char *user_name;
1109     const char *passwd;
1110
1111     debug("cmgr: decoding pub: '%s'\n", safe_str(req->pub_auth));
1112     safe_free(req->passwd);
1113
1114     if (!req->pub_auth || strlen(req->pub_auth) < 4 + strlen(safe_str(req->hostname)))
1115         return;
1116
1117     const int decodedLen = base64_decode_len(req->pub_auth);
1118     buf = (char*)xmalloc(decodedLen);
1119     base64_decode(buf, decodedLen, req->pub_auth);
1120
1121     debug("cmgr: length ok\n");
1122
1123     /* parse ( a lot of memory leaks, but that is cachemgr style :) */
1124     if ((host_name = strtok(buf, "|")) == NULL)
1125         return;
1126
1127     debug("cmgr: decoded host: '%s'\n", host_name);
1128
1129     if ((time_str = strtok(NULL, "|")) == NULL)
1130         return;
1131
1132     debug("cmgr: decoded time: '%s' (now: %d)\n", time_str, (int) now);
1133
1134     if ((user_name = strtok(NULL, "|")) == NULL)
1135         return;
1136
1137     debug("cmgr: decoded uname: '%s'\n", user_name);
1138
1139     if ((passwd = strtok(NULL, "|")) == NULL)
1140         return;
1141
1142     debug("cmgr: decoded passwd: '%s'\n", passwd);
1143
1144     /* verify freshness and validity */
1145     if (atoi(time_str) + passwd_ttl < now)
1146         return;
1147
1148     if (strcasecmp(host_name, req->hostname))
1149         return;
1150
1151     debug("cmgr: verified auth. info.\n");
1152
1153     /* ok, accept */
1154     xfree(req->user_name);
1155
1156     req->user_name = xstrdup(user_name);
1157
1158     req->passwd = xstrdup(passwd);
1159
1160     xfree(buf);
1161 }
1162
1163 static void
1164 reset_auth(cachemgr_request * req)
1165 {
1166     safe_free(req->passwd);
1167     safe_free(req->pub_auth);
1168 }
1169
1170 static const char *
1171 make_auth_header(const cachemgr_request * req)
1172 {
1173     static char buf[1024];
1174     size_t stringLength = 0;
1175
1176     if (!req->passwd)
1177         return "";
1178
1179     int bufLen = snprintf(buf, sizeof(buf), "%s:%s",
1180                           req->user_name ? req->user_name : "",
1181                           req->passwd);
1182
1183     int encodedLen = base64_encode_len(bufLen);
1184     if (encodedLen <= 0)
1185         return "";
1186
1187     char *str64 = static_cast<char*>(xmalloc(encodedLen));
1188     base64_encode_str(str64, encodedLen, buf, bufLen);
1189
1190     stringLength += snprintf(buf, sizeof(buf), "Authorization: Basic %s\r\n", str64);
1191
1192     assert(stringLength < sizeof(buf));
1193
1194     snprintf(&buf[stringLength], sizeof(buf) - stringLength, "Proxy-Authorization: Basic %s\r\n", str64);
1195
1196     return buf;
1197 }
1198
1199 static int
1200 check_target_acl(const char *hostname, int port)
1201 {
1202     char config_line[BUFSIZ];
1203     FILE *fp = NULL;
1204     int ret = 0;
1205     fp = fopen("cachemgr.conf", "r");
1206
1207     if (fp == NULL)
1208         fp = fopen(DEFAULT_CACHEMGR_CONFIG, "r");
1209
1210     if (fp == NULL) {
1211 #ifdef CACHEMGR_HOSTNAME_DEFINED
1212
1213         if (strcmp(hostname, CACHEMGR_HOSTNAME) == 0 && port == CACHE_HTTP_PORT)
1214             return 1;
1215
1216 #else
1217
1218         if (strcmp(hostname, "localhost") == 0)
1219             return 1;
1220
1221         if (strcmp(hostname, getfullhostname()) == 0)
1222             return 1;
1223
1224 #endif
1225
1226         return 0;
1227     }
1228
1229     while (fgets(config_line, BUFSIZ, fp)) {
1230         char *token = NULL;
1231         strtok(config_line, " \r\n\t");
1232
1233         if (config_line[0] == '#')
1234             continue;
1235
1236         if (config_line[0] == '\0')
1237             continue;
1238
1239         if ((token = strtok(config_line, ":")) == NULL)
1240             continue;
1241
1242 #if HAVE_FNMATCH_H
1243
1244         if (fnmatch(token, hostname, 0) != 0)
1245             continue;
1246
1247 #else
1248
1249         if (strcmp(token, hostname) != 0)
1250             continue;
1251
1252 #endif
1253
1254         if ((token = strtok(NULL, ":")) != NULL) {
1255             int i;
1256
1257             if (strcmp(token, "*") == 0)
1258
1259                 ;   /* Wildcard port specification */
1260             else if (strcasecmp(token, "any") == 0)
1261
1262                 ;   /* Wildcard port specification */
1263             else if (sscanf(token, "%d", &i) != 1)
1264                 continue;
1265
1266             else if (i != port)
1267                 continue;
1268         } else if (port != CACHE_HTTP_PORT)
1269             continue;
1270
1271         ret = 1;
1272
1273         break;
1274     }
1275
1276     fclose(fp);
1277     return ret;
1278 }