src/structs.h

   1 /*
   2  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   3  * ----------------------------------------------------------
   4  *
   5  *  Squid is the result of efforts by numerous individuals from
   6  *  the Internet community; see the CONTRIBUTORS file for full
   7  *  details.   Many organizations have provided support for Squid's
   8  *  development; see the SPONSORS file for full details.  Squid is
   9  *  Copyrighted (C) 2001 by the Regents of the University of
  10  *  California; see the COPYRIGHT file for full details.  Squid
  11  *  incorporates software developed and/or copyrighted by other
  12  *  sources; see the CREDITS file for full details.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License as published by
  16  *  the Free Software Foundation; either version 2 of the License, or
  17  *  (at your option) any later version.
  18  *
  19  *  This program is distributed in the hope that it will be useful,
  20  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *  GNU General Public License for more details.
  23  *
  24  *  You should have received a copy of the GNU General Public License
  25  *  along with this program; if not, write to the Free Software
  26  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  27  *
  28  */
  29 #ifndef SQUID_STRUCTS_H
  30 #define SQUID_STRUCTS_H
  31
  32 #include "RefCount.h"
  33 #include "cbdata.h"
  34 #include "dlink.h"
  35 #include "err_type.h"
  36
  37 /* needed for the global config */
  38 #include "HttpHeader.h"
  39
  40 /* for ICP_END */
  41 #include "icp_opcode.h"
  42
  43 #if USE_SSL
  44 #include <openssl/ssl.h>
  45 #endif
  46
  47 #define PEER_MULTICAST_SIBLINGS 1
  48
  49 struct acl_name_list {
  50     char name[ACL_NAME_SZ];
  51     acl_name_list *next;
  52 };
  53
  54 struct acl_deny_info_list {
  55     err_type err_page_id;
  56     char *err_page_name;
  57     acl_name_list *acl_list;
  58     acl_deny_info_list *next;
  59 };
  60
  61
  62 class acl_access;
  63
  64 struct _header_mangler {
  65     acl_access *access_list;
  66     char *replacement;
  67 };
  68
  69 class ACLChecklist;
  70
  71 #if SQUID_SNMP
  72
  73 struct _snmp_request_t {
  74     u_char *buf;
  75     u_char *outbuf;
  76     int len;
  77     int sock;
  78     long reqid;
  79     int outlen;
  80
  81     Ip::Address from;
  82
  83     struct snmp_pdu *PDU;
  84     ACLChecklist *acl_checklist;
  85     u_char *community;
  86
  87     struct snmp_session session;
  88 };
  89
  90 #endif
  91
  92 class ACLList;
  93
  94 struct acl_address {
  95     acl_address *next;
  96     ACLList *aclList;
  97
  98     Ip::Address addr;
  99 };
 100
 101 struct acl_tos {
 102     acl_tos *next;
 103     ACLList *aclList;
 104     tos_t tos;
 105 };
 106
 107 struct acl_nfmark {
 108     acl_nfmark *next;
 109     ACLList *aclList;
 110     nfmark_t nfmark;
 111 };
 112
 113 struct acl_size_t {
 114     acl_size_t *next;
 115     ACLList *aclList;
 116     int64_t size;
 117 };
 118
 119 struct ushortlist {
 120     unsigned short i;
 121     ushortlist *next;
 122 };
 123
 124 struct relist {
 125     int flags;
 126     char *pattern;
 127     regex_t regex;
 128     relist *next;
 129 };
 130
 131 #if USE_DELAY_POOLS
 132 #include "DelayConfig.h"
 133 #include "ClientDelayConfig.h"
 134 #endif
 135
 136 #if USE_ICMP
 137 #include "icmp/IcmpConfig.h"
 138 #endif
 139
 140 #include "HelperChildConfig.h"
 141
 142 /* forward decl for SquidConfig, see RemovalPolicy.h */
 143
 144 class CpuAffinityMap;
 145 class RemovalPolicySettings;
 146 class external_acl;
 147 class Store;
 148 struct http_port_list;
 149 class SwapDir;
 150
 151 /// Used for boolean enabled/disabled options with complex default logic.
 152 /// Allows Squid to compute the right default after configuration.
 153 /// Checks that not-yet-defined option values are not used.
 154 class YesNoNone
 155 {
 156 // TODO: generalize to non-boolean option types
 157 public:
 158     YesNoNone(): option(0) {}
 159
 160     /// returns true iff enabled; asserts if the option has not been configured
 161     operator void *() const; // TODO: use a fancy/safer version of the operator
 162
 163     /// enables or disables the option;
 164     void configure(bool beSet);
 165
 166     /// whether the option was enabled or disabled, by user or Squid
 167     bool configured() const { return option != 0; }
 168
 169 private:
 170     enum { optUnspecified = -1, optDisabled = 0, optEnabled = 1 };
 171     int option; ///< configured value or zero
 172 };
 173
 174 struct SquidConfig {
 175
 176     struct {
 177         /* These should be for the Store::Root instance.
 178         * this needs pluggable parsing to be done smoothly.
 179         */
 180         int highWaterMark;
 181         int lowWaterMark;
 182     } Swap;
 183
 184     YesNoNone memShared; ///< whether the memory cache is shared among workers
 185     size_t memMaxSize;
 186
 187     struct {
 188         int64_t min;
 189         int pct;
 190         int64_t max;
 191     } quickAbort;
 192     int64_t readAheadGap;
 193     RemovalPolicySettings *replPolicy;
 194     RemovalPolicySettings *memPolicy;
 195 #if USE_HTTP_VIOLATIONS
 196     time_t negativeTtl;
 197 #endif
 198     time_t maxStale;
 199     time_t negativeDnsTtl;
 200     time_t positiveDnsTtl;
 201     time_t shutdownLifetime;
 202     time_t backgroundPingRate;
 203
 204     struct {
 205         time_t read;
 206         time_t write;
 207         time_t lifetime;
 208         time_t connect;
 209         time_t forward;
 210         time_t peer_connect;
 211         time_t request;
 212         time_t clientIdlePconn;
 213         time_t serverIdlePconn;
 214         time_t siteSelect;
 215         time_t deadPeer;
 216         int icp_query;          /* msec */
 217         int icp_query_max;      /* msec */
 218         int icp_query_min;      /* msec */
 219         int mcast_icp_query;    /* msec */
 220
 221 #if !USE_DNSHELPER
 222         time_msec_t idns_retransmit;
 223         time_msec_t idns_query;
 224 #endif
 225
 226     } Timeout;
 227     size_t maxRequestHeaderSize;
 228     int64_t maxRequestBodySize;
 229     int64_t maxChunkedRequestBodySize;
 230     size_t maxRequestBufferSize;
 231     size_t maxReplyHeaderSize;
 232     acl_size_t *ReplyBodySize;
 233
 234     struct {
 235         unsigned short icp;
 236 #if USE_HTCP
 237
 238         unsigned short htcp;
 239 #endif
 240 #if SQUID_SNMP
 241
 242         unsigned short snmp;
 243 #endif
 244     } Port;
 245
 246     struct {
 247         http_port_list *http;
 248 #if USE_SSL
 249         http_port_list *https;
 250 #endif
 251
 252     } Sockaddr;
 253 #if SQUID_SNMP
 254
 255     struct {
 256         char *configFile;
 257         char *agentInfo;
 258     } Snmp;
 259 #endif
 260 #if USE_WCCP
 261
 262     struct {
 263         Ip::Address router;
 264         Ip::Address address;
 265         int version;
 266     } Wccp;
 267 #endif
 268 #if USE_WCCPv2
 269
 270     struct {
 271         Ip::Address_list *router;
 272         Ip::Address address;
 273         int forwarding_method;
 274         int return_method;
 275         int assignment_method;
 276         int weight;
 277         int rebuildwait;
 278         void *info;
 279     } Wccp2;
 280 #endif
 281
 282 #if USE_ICMP
 283     IcmpConfig pinger;
 284 #endif
 285
 286     char *as_whois_server;
 287
 288     struct {
 289         char *store;
 290         char *swap;
 291         customlog *accesslogs;
 292 #if ICAP_CLIENT
 293         customlog *icaplogs;
 294 #endif
 295         int rotateNumber;
 296     } Log;
 297     char *adminEmail;
 298     char *EmailFrom;
 299     char *EmailProgram;
 300     char *effectiveUser;
 301     char *visible_appname_string;
 302     char *effectiveGroup;
 303
 304     struct {
 305 #if USE_DNSHELPER
 306         char *dnsserver;
 307 #endif
 308
 309         wordlist *redirect;
 310 #if USE_UNLINKD
 311
 312         char *unlinkd;
 313 #endif
 314
 315         char *diskd;
 316 #if USE_SSL
 317
 318         char *ssl_password;
 319 #endif
 320
 321     } Program;
 322 #if USE_DNSHELPER
 323     HelperChildConfig dnsChildren;
 324 #endif
 325
 326     HelperChildConfig redirectChildren;
 327     time_t authenticateGCInterval;
 328     time_t authenticateTTL;
 329     time_t authenticateIpTTL;
 330
 331     struct {
 332         char *surrogate_id;
 333     } Accel;
 334     char *appendDomain;
 335     size_t appendDomainLen;
 336     char *pidFilename;
 337     char *netdbFilename;
 338     char *mimeTablePathname;
 339     char *etcHostsPath;
 340     char *visibleHostname;
 341     char *uniqueHostname;
 342     wordlist *hostnameAliases;
 343     char *errHtmlText;
 344
 345     struct {
 346         char *host;
 347         char *file;
 348         time_t period;
 349         unsigned short port;
 350     } Announce;
 351
 352     struct {
 353
 354         Ip::Address udp_incoming;
 355         Ip::Address udp_outgoing;
 356 #if SQUID_SNMP
 357         Ip::Address snmp_incoming;
 358         Ip::Address snmp_outgoing;
 359 #endif
 360         /* FIXME INET6 : this should really be a CIDR value */
 361         Ip::Address client_netmask;
 362     } Addrs;
 363     size_t tcpRcvBufsz;
 364     size_t udpMaxHitObjsz;
 365     wordlist *hierarchy_stoplist;
 366     wordlist *mcast_group_list;
 367     wordlist *dns_nameservers;
 368     peer *peers;
 369     int npeers;
 370
 371     struct {
 372         int size;
 373         int low;
 374         int high;
 375     } ipcache;
 376
 377     struct {
 378         int size;
 379     } fqdncache;
 380     int minDirectHops;
 381     int minDirectRtt;
 382     cachemgr_passwd *passwd_list;
 383
 384     struct {
 385         int objectsPerBucket;
 386         int64_t avgObjectSize;
 387         int64_t maxObjectSize;
 388         int64_t minObjectSize;
 389         size_t maxInMemObjSize;
 390     } Store;
 391
 392     struct {
 393         int high;
 394         int low;
 395         time_t period;
 396     } Netdb;
 397
 398     struct {
 399         int log_udp;
 400         int res_defnames;
 401         int anonymizer;
 402         int client_db;
 403         int query_icmp;
 404         int icp_hit_stale;
 405         int buffered_logs;
 406         int common_log;
 407         int log_mime_hdrs;
 408         int log_fqdn;
 409         int announce;
 410         int mem_pools;
 411         int test_reachability;
 412         int half_closed_clients;
 413         int refresh_all_ims;
 414 #if USE_HTTP_VIOLATIONS
 415
 416         int reload_into_ims;
 417 #endif
 418
 419         int offline;
 420         int redir_rewrites_host;
 421         int prefer_direct;
 422         int nonhierarchical_direct;
 423         int strip_query_terms;
 424         int redirector_bypass;
 425         int ignore_unknown_nameservers;
 426         int client_pconns;
 427         int server_pconns;
 428         int error_pconns;
 429 #if USE_CACHE_DIGESTS
 430
 431         int digest_generation;
 432 #endif
 433
 434         int ie_refresh;
 435         int vary_ignore_expire;
 436         int pipeline_prefetch;
 437         int surrogate_is_remote;
 438         int request_entities;
 439         int detect_broken_server_pconns;
 440         int balance_on_multiple_ip;
 441         int relaxed_header_parser;
 442         int check_hostnames;
 443         int allow_underscore;
 444         int via;
 445         int emailErrData;
 446         int httpd_suppress_version_string;
 447         int global_internal_static;
 448
 449 #if FOLLOW_X_FORWARDED_FOR
 450         int acl_uses_indirect_client;
 451         int delay_pool_uses_indirect_client;
 452         int log_uses_indirect_client;
 453 #if LINUX_NETFILTER
 454         int tproxy_uses_indirect_client;
 455 #endif
 456 #endif /* FOLLOW_X_FORWARDED_FOR */
 457
 458         int WIN32_IpAddrChangeMonitor;
 459         int memory_cache_first;
 460         int memory_cache_disk;
 461         int hostStrictVerify;
 462         int client_dst_passthru;
 463     } onoff;
 464
 465     int forward_max_tries;
 466     int connect_retries;
 467
 468     class ACL *aclList;
 469
 470     struct {
 471         acl_access *http;
 472         acl_access *adapted_http;
 473         acl_access *icp;
 474         acl_access *miss;
 475         acl_access *NeverDirect;
 476         acl_access *AlwaysDirect;
 477         acl_access *ASlists;
 478         acl_access *noCache;
 479         acl_access *log;
 480 #if SQUID_SNMP
 481
 482         acl_access *snmp;
 483 #endif
 484 #if USE_HTTP_VIOLATIONS
 485         acl_access *brokenPosts;
 486 #endif
 487         acl_access *redirector;
 488         acl_access *reply;
 489         acl_address *outgoing_address;
 490 #if USE_HTCP
 491
 492         acl_access *htcp;
 493         acl_access *htcp_clr;
 494 #endif
 495
 496 #if USE_SSL
 497         acl_access *ssl_bump;
 498 #endif
 499 #if FOLLOW_X_FORWARDED_FOR
 500         acl_access *followXFF;
 501 #endif /* FOLLOW_X_FORWARDED_FOR */
 502
 503 #if ICAP_CLIENT
 504         acl_access* icap;
 505 #endif
 506     } accessList;
 507     acl_deny_info_list *denyInfoList;
 508
 509     struct {
 510         size_t list_width;
 511         int list_wrap;
 512         char *anon_user;
 513         int passive;
 514         int epsv_all;
 515         int epsv;
 516         int eprt;
 517         int sanitycheck;
 518         int telnet;
 519     } Ftp;
 520     refresh_t *Refresh;
 521
 522     struct _cacheSwap {
 523         RefCount<SwapDir> *swapDirs;
 524         int n_allocated;
 525         int n_configured;
 526         /// number of disk processes required to support all cache_dirs
 527         int n_strands;
 528     } cacheSwap;
 529     /*
 530      * I'm sick of having to keep doing this ..
 531      */
 532 #define INDEXSD(i)   (Config.cacheSwap.swapDirs[(i)].getRaw())
 533
 534     struct {
 535         char *directory;
 536         int use_short_names;
 537     } icons;
 538     char *errorDirectory;
 539 #if USE_ERR_LOCALES
 540     char *errorDefaultLanguage;
 541     int errorLogMissingLanguages;
 542 #endif
 543     char *errorStylesheet;
 544
 545     struct {
 546         int onerror;
 547     } retry;
 548
 549     struct {
 550         int64_t limit;
 551     } MemPools;
 552 #if USE_DELAY_POOLS
 553
 554     DelayConfig Delay;
 555     ClientDelayConfig ClientDelay;
 556 #endif
 557
 558     struct {
 559         int icp_average;
 560         int dns_average;
 561         int http_average;
 562         int icp_min_poll;
 563         int dns_min_poll;
 564         int http_min_poll;
 565     } comm_incoming;
 566     int max_open_disk_fds;
 567     int uri_whitespace;
 568     acl_size_t *rangeOffsetLimit;
 569 #if MULTICAST_MISS_STREAM
 570
 571     struct {
 572
 573         Ip::Address addr;
 574         int ttl;
 575         unsigned short port;
 576         char *encode_key;
 577     } mcast_miss;
 578 #endif
 579
 580     /* one access list per header type we know of */
 581     header_mangler request_header_access[HDR_ENUM_END];
 582     /* one access list per header type we know of */
 583     header_mangler reply_header_access[HDR_ENUM_END];
 584     char *coredump_dir;
 585     char *chroot_dir;
 586 #if USE_CACHE_DIGESTS
 587
 588     struct {
 589         int bits_per_entry;
 590         time_t rebuild_period;
 591         time_t rewrite_period;
 592         size_t swapout_chunk_size;
 593         int rebuild_chunk_percentage;
 594     } digest;
 595 #endif
 596 #if USE_SSL
 597
 598     struct {
 599         int unclean_shutdown;
 600         char *ssl_engine;
 601     } SSL;
 602 #endif
 603
 604     wordlist *ext_methods;
 605
 606     struct {
 607         int high_rptm;
 608         int high_pf;
 609         size_t high_memory;
 610     } warnings;
 611     char *store_dir_select_algorithm;
 612     int sleep_after_fork;       /* microseconds */
 613     time_t minimum_expiry_time; /* seconds */
 614     external_acl *externalAclHelperList;
 615
 616 #if USE_SSL
 617
 618     struct {
 619         char *cert;
 620         char *key;
 621         int version;
 622         char *options;
 623         char *cipher;
 624         char *cafile;
 625         char *capath;
 626         char *crlfile;
 627         char *flags;
 628         acl_access *cert_error;
 629         SSL_CTX *sslContext;
 630     } ssl_client;
 631 #endif
 632
 633     char *accept_filter;
 634     int umask;
 635     int max_filedescriptors;
 636     int workers;
 637     CpuAffinityMap *cpuAffinityMap;
 638
 639 #if USE_LOADABLE_MODULES
 640     wordlist *loadable_module_names;
 641 #endif
 642
 643     int client_ip_max_connections;
 644
 645     struct {
 646         int v4_first;       ///< Place IPv4 first in the order of DNS results.
 647         ssize_t packet_max; ///< maximum size EDNS advertised for DNS replies.
 648     } dns;
 649 };
 650
 651 SQUIDCEXTERN SquidConfig Config;
 652
 653 struct SquidConfig2 {
 654     struct {
 655         int enable_purge;
 656         int mangle_request_headers;
 657     } onoff;
 658     uid_t effectiveUserID;
 659     gid_t effectiveGroupID;
 660 };
 661
 662 SQUIDCEXTERN SquidConfig2 Config2;
 663
 664 struct _close_handler {
 665     PF *handler;
 666     void *data;
 667     close_handler *next;
 668 };
 669
 670 struct _dread_ctrl {
 671     int fd;
 672     off_t offset;
 673     int req_len;
 674     char *buf;
 675     int end_of_file;
 676     DRCB *handler;
 677     void *client_data;
 678 };
 679
 680 struct _dwrite_q {
 681     off_t file_offset;
 682     char *buf;
 683     size_t len;
 684     size_t buf_offset;
 685     dwrite_q *next;
 686     FREE *free_func;
 687 };
 688
 689 struct _fde_disk {
 690     DWCB *wrt_handle;
 691     void *wrt_handle_data;
 692     dwrite_q *write_q;
 693     dwrite_q *write_q_tail;
 694     off_t offset;
 695 };
 696
 697
 698 /* per field statistics */
 699
 700 class HttpHeaderFieldStat
 701 {
 702
 703 public:
 704     HttpHeaderFieldStat() : aliveCount(0), seenCount(0), parsCount(0), errCount(0), repCount(0) {}
 705
 706     int aliveCount;             /* created but not destroyed (count) */
 707     int seenCount;              /* #fields we've seen */
 708     int parsCount;              /* #parsing attempts */
 709     int errCount;               /* #pasring errors */
 710     int repCount;               /* #repetitons */
 711 };
 712
 713 /* compiled version of HttpHeaderFieldAttrs plus stats */
 714 #include "SquidString.h"
 715
 716 class HttpHeaderFieldInfo
 717 {
 718
 719 public:
 720     HttpHeaderFieldInfo() : id (HDR_ACCEPT), type (ftInvalid) {}
 721
 722     http_hdr_type id;
 723     String name;
 724     field_type type;
 725     HttpHeaderFieldStat stat;
 726 };
 727
 728 struct _http_state_flags {
 729     unsigned int proxying:1;
 730     unsigned int keepalive:1;
 731     unsigned int only_if_cached:1;
 732     unsigned int handling1xx:1; ///< we are ignoring or forwarding 1xx response
 733     unsigned int headers_parsed:1;
 734     unsigned int front_end_https:2;
 735     unsigned int originpeer:1;
 736     unsigned int keepalive_broken:1;
 737     unsigned int abuse_detected:1;
 738     unsigned int request_sent:1;
 739     unsigned int do_next_read:1;
 740     unsigned int consume_body_data:1;
 741     unsigned int chunked:1; ///< reading a chunked response; TODO: rename
 742     unsigned int chunked_request:1; ///< writing a chunked request
 743     unsigned int sentLastChunk:1; ///< do not try to write last-chunk again
 744 };
 745
 746 struct _domain_ping {
 747     char *domain;
 748     int do_ping;                /* boolean */
 749     domain_ping *next;
 750 };
 751
 752 struct _domain_type {
 753     char *domain;
 754     peer_t type;
 755     domain_type *next;
 756 };
 757
 758 class PeerDigest;
 759
 760 struct peer {
 761     u_int index;
 762     char *name;
 763     char *host;
 764     peer_t type;
 765
 766     Ip::Address in_addr;
 767
 768     struct {
 769         int pings_sent;
 770         int pings_acked;
 771         int fetches;
 772         int rtt;
 773         int ignored_replies;
 774         int n_keepalives_sent;
 775         int n_keepalives_recv;
 776         time_t probe_start;
 777         time_t last_query;
 778         time_t last_reply;
 779         time_t last_connect_failure;
 780         time_t last_connect_probe;
 781         int logged_state;       /* so we can print dead/revived msgs */
 782         int conn_open;          /* current opened connections */
 783     } stats;
 784
 785     struct {
 786         int version;
 787         int counts[ICP_END+1];
 788         unsigned short port;
 789     } icp;
 790
 791 #if USE_HTCP
 792     struct {
 793         double version;
 794         int counts[2];
 795         unsigned short port;
 796     } htcp;
 797 #endif
 798
 799     unsigned short http_port;
 800     domain_ping *peer_domain;
 801     domain_type *typelist;
 802     acl_access *access;
 803
 804     struct {
 805         unsigned int proxy_only:1;
 806         unsigned int no_query:1;
 807         unsigned int background_ping:1;
 808         unsigned int no_digest:1;
 809         unsigned int default_parent:1;
 810         unsigned int roundrobin:1;
 811         unsigned int weighted_roundrobin:1;
 812         unsigned int mcast_responder:1;
 813         unsigned int closest_only:1;
 814 #if USE_HTCP
 815         unsigned int htcp:1;
 816         unsigned int htcp_oldsquid:1;
 817         unsigned int htcp_no_clr:1;
 818         unsigned int htcp_no_purge_clr:1;
 819         unsigned int htcp_only_clr:1;
 820         unsigned int htcp_forward_clr:1;
 821 #endif
 822         unsigned int no_netdb_exchange:1;
 823 #if USE_DELAY_POOLS
 824         unsigned int no_delay:1;
 825 #endif
 826         unsigned int allow_miss:1;
 827         unsigned int carp:1;
 828         struct {
 829             unsigned int set:1; //If false, whole url is to be used. Overrides others
 830             unsigned int scheme:1;
 831             unsigned int host:1;
 832             unsigned int port:1;
 833             unsigned int path:1;
 834             unsigned int params:1;
 835         } carp_key;
 836 #if USE_AUTH
 837         unsigned int userhash:1;
 838 #endif
 839         unsigned int sourcehash:1;
 840         unsigned int originserver:1;
 841         unsigned int no_tproxy:1;
 842 #if PEER_MULTICAST_SIBLINGS
 843         unsigned int mcast_siblings:1;
 844 #endif
 845     } options;
 846
 847     int weight;
 848     int basetime;
 849
 850     struct {
 851         double avg_n_members;
 852         int n_times_counted;
 853         int n_replies_expected;
 854         int ttl;
 855         int id;
 856
 857         struct {
 858             unsigned int count_event_pending:1;
 859             unsigned int counting:1;
 860         } flags;
 861     } mcast;
 862 #if USE_CACHE_DIGESTS
 863
 864     PeerDigest *digest;
 865     char *digest_url;
 866 #endif
 867
 868     int tcp_up;                 /* 0 if a connect() fails */
 869
 870     Ip::Address addresses[10];
 871     int n_addresses;
 872     int rr_count;
 873     peer *next;
 874     int testing_now;
 875
 876     struct {
 877         unsigned int hash;
 878         double load_multiplier;
 879         double load_factor;     /* normalized weight value */
 880     } carp;
 881 #if USE_AUTH
 882     struct {
 883         unsigned int hash;
 884         double load_multiplier;
 885         double load_factor;     /* normalized weight value */
 886     } userhash;
 887 #endif
 888     struct {
 889         unsigned int hash;
 890         double load_multiplier;
 891         double load_factor;     /* normalized weight value */
 892     } sourcehash;
 893
 894     char *login;                /* Proxy authorization */
 895     time_t connect_timeout;
 896     int connect_fail_limit;
 897     int max_conn;
 898     char *domain;               /* Forced domain */
 899 #if USE_SSL
 900
 901     int use_ssl;
 902     char *sslcert;
 903     char *sslkey;
 904     int sslversion;
 905     char *ssloptions;
 906     char *sslcipher;
 907     char *sslcafile;
 908     char *sslcapath;
 909     char *sslcrlfile;
 910     char *sslflags;
 911     char *ssldomain;
 912     SSL_CTX *sslContext;
 913     SSL_SESSION *sslSession;
 914 #endif
 915
 916     int front_end_https;
 917     int connection_auth;
 918 };
 919
 920 struct _net_db_name {
 921     hash_link hash;             /* must be first */
 922     net_db_name *next;
 923     netdbEntry *net_db_entry;
 924 };
 925
 926 struct _net_db_peer {
 927     const char *peername;
 928     double hops;
 929     double rtt;
 930     time_t expires;
 931 };
 932
 933 struct _netdbEntry {
 934     hash_link hash;             /* must be first */
 935     char network[MAX_IPSTRLEN];
 936     int pings_sent;
 937     int pings_recv;
 938     double hops;
 939     double rtt;
 940     time_t next_ping_time;
 941     time_t last_use_time;
 942     int link_count;
 943     net_db_name *hosts;
 944     net_db_peer *peers;
 945     int n_peers_alloc;
 946     int n_peers;
 947 };
 948
 949 struct _iostats {
 950
 951     enum { histSize = 16 };
 952
 953     struct {
 954         int reads;
 955         int reads_deferred;
 956         int read_hist[histSize];
 957         int writes;
 958         int write_hist[histSize];
 959     }
 960
 961     Http, Ftp, Gopher;
 962 };
 963
 964
 965 struct request_flags {
 966     request_flags(): range(0),nocache(0),ims(0),auth(0),cachable(0),hierarchical(0),loopdetect(0),proxy_keepalive(0),proxying(0),refresh(0),redirected(0),need_validation(0),fail_on_validation_err(0),stale_if_hit(0),accelerated(0),ignore_cc(0),intercepted(0),spoof_client_ip(0),internal(0),internalclient(0),must_keepalive(0),chunked_reply(0),stream_error(0),sslBumped(0),destinationIPLookedUp_(0) {
 967 #if USE_HTTP_VIOLATIONS
 968         nocache_hack = 0;
 969 #endif
 970 #if FOLLOW_X_FORWARDED_FOR
 971         done_follow_x_forwarded_for = 0;
 972 #endif /* FOLLOW_X_FORWARDED_FOR */
 973     }
 974
 975     unsigned int range:1;
 976     unsigned int nocache:1;
 977     unsigned int ims:1;
 978     unsigned int auth:1;
 979     unsigned int cachable:1;
 980     unsigned int hierarchical:1;
 981     unsigned int loopdetect:1;
 982     unsigned int proxy_keepalive:1;
 983 unsigned int proxying:
 984     1;  /* this should be killed, also in httpstateflags */
 985     unsigned int refresh:1;
 986     unsigned int redirected:1;
 987     unsigned int need_validation:1;
 988     unsigned int fail_on_validation_err:1; ///< whether we should fail if validation fails
 989     unsigned int stale_if_hit:1; ///< reply is stale if it is a hit
 990 #if USE_HTTP_VIOLATIONS
 991     unsigned int nocache_hack:1;        /* for changing/ignoring no-cache requests */
 992 #endif
 993     unsigned int accelerated:1;
 994     unsigned int ignore_cc:1;
 995     unsigned int intercepted:1;  /**< transparently intercepted request */
 996     unsigned int spoof_client_ip:1;  /**< spoof client ip if possible */
 997     unsigned int internal:1;
 998     unsigned int internalclient:1;
 999     unsigned int must_keepalive:1;
1000     unsigned int connection_auth:1; /** Request wants connection oriented auth */
1001     unsigned int connection_auth_disabled:1; /** Connection oriented auth can not be supported */
1002     unsigned int connection_proxy_auth:1; /** Request wants connection oriented auth */
1003     unsigned int pinned:1;      /* Request sent on a pinned connection */
1004     unsigned int auth_sent:1;   /* Authentication forwarded */
1005     unsigned int no_direct:1;   /* Deny direct forwarding unless overriden by always_direct. Used in accelerator mode */
1006     unsigned int chunked_reply:1; /**< Reply with chunked transfer encoding */
1007     unsigned int stream_error:1; /**< Whether stream error has occured */
1008     unsigned int sslBumped:1; /**< ssl-bumped request*/
1009
1010     // When adding new flags, please update cloneAdaptationImmune() as needed.
1011
1012     bool resetTCP() const;
1013     void setResetTCP();
1014     void clearResetTCP();
1015     void destinationIPLookupCompleted();
1016     bool destinationIPLookedUp() const;
1017
1018     // returns a partial copy of the flags that includes only those flags
1019     // that are safe for a related (e.g., ICAP-adapted) request to inherit
1020     request_flags cloneAdaptationImmune() const;
1021
1022 #if FOLLOW_X_FORWARDED_FOR
1023     unsigned int done_follow_x_forwarded_for;
1024 #endif /* FOLLOW_X_FORWARDED_FOR */
1025 private:
1026
1027     unsigned int reset_tcp:1;
1028     unsigned int destinationIPLookedUp_:1;
1029 };
1030
1031 struct _link_list {
1032     void *ptr;
1033
1034     struct _link_list *next;
1035 };
1036
1037 struct _cachemgr_passwd {
1038     char *passwd;
1039     wordlist *actions;
1040     cachemgr_passwd *next;
1041 };
1042
1043 struct _refresh_t {
1044     const char *pattern;
1045     regex_t compiled_pattern;
1046     time_t min;
1047     double pct;
1048     time_t max;
1049     refresh_t *next;
1050
1051     struct {
1052         unsigned int icase:1;
1053         unsigned int refresh_ims:1;
1054         unsigned int store_stale:1;
1055 #if USE_HTTP_VIOLATIONS
1056         unsigned int override_expire:1;
1057         unsigned int override_lastmod:1;
1058         unsigned int reload_into_ims:1;
1059         unsigned int ignore_reload:1;
1060         unsigned int ignore_no_cache:1;
1061         unsigned int ignore_no_store:1;
1062         unsigned int ignore_must_revalidate:1;
1063         unsigned int ignore_private:1;
1064         unsigned int ignore_auth:1;
1065 #endif
1066     } flags;
1067     int max_stale;
1068 };
1069
1070
1071 struct _CacheDigest {
1072     /* public, read-only */
1073     char *mask;                 /* bit mask */
1074     int mask_size;              /* mask size in bytes */
1075     int capacity;               /* expected maximum for .count, not a hard limit */
1076     int bits_per_entry;         /* number of bits allocated for each entry from capacity */
1077     int count;                  /* number of digested entries */
1078     int del_count;              /* number of deletions performed so far */
1079 };
1080
1081
1082 struct _store_rebuild_data {
1083     int objcount;               /* # objects successfully reloaded */
1084     int expcount;               /* # objects expired */
1085     int scancount;              /* # entries scanned or read from state file */
1086     int clashcount;             /* # swapfile clashes avoided */
1087     int dupcount;               /* # duplicates purged */
1088     int cancelcount;            /* # SWAP_LOG_DEL objects purged */
1089     int invalid;                /* # bad lines */
1090     int badflags;               /* # bad e->flags */
1091     int bad_log_op;
1092     int zero_object_sz;
1093 };
1094
1095 class Logfile;
1096
1097 #include "format/Format.h"
1098 #include "log/Formats.h"
1099 struct _customlog {
1100     char *filename;
1101     ACLList *aclList;
1102     Format::Format *logFormat;
1103     Logfile *logfile;
1104     customlog *next;
1105     Log::Format::log_type type;
1106 };
1107
1108 #endif /* SQUID_STRUCTS_H */