urldata.h

                      is always set TRUE when curl_easy_perform() is called. */

  struct digestdata digest;
  struct digestdata proxydigest;

#ifdef HAVE_GSSAPI
  struct negotiatedata negotiate;
#endif

  struct auth authhost;
  struct auth authproxy;

  bool authproblem; /* TRUE if there's some problem authenticating */

#ifdef USE_ARES
  ares_channel areschannel; /* for name resolves */
#endif

#if defined(USE_SSLEAY) && defined(HAVE_OPENSSL_ENGINE_H)
  ENGINE *engine;
#endif /* USE_SSLEAY */
  struct timeval expiretime; /* set this with Curl_expire() only */
  struct Curl_tree timenode; /* for the splay stuff */

  /* a place to store the most recenlty set FTP entrypath */
  char *most_recent_ftp_entrypath;

  /* set after initial USER failure, to prevent an authentication loop */
  bool ftp_trying_alternative;

  bool expect100header;  /* TRUE if we added Expect: 100-continue */

  bool pipe_broke; /* TRUE if the connection we were pipelined on broke
                      and we need to restart from the beginning */
  bool cancelled; /* TRUE if the request was cancelled */

#ifndef WIN32
/* do FTP line-end conversions on most platforms */
#define CURL_DO_LINEEND_CONV
  /* for FTP downloads: track CRLF sequences that span blocks */
  bool prev_block_had_trailing_cr;
  /* for FTP downloads: how many CRLFs did we converted to LFs? */
  curl_off_t crlf_conversions;
#endif
  /* If set to non-NULL, there's a connection in a shared connection cache
     that uses this handle so we can't kill this SessionHandle just yet but
     must keep it around and add it to the list of handles to kill once all
     its connections are gone */
  void *shared_conn;
  bool closed; /* set to TRUE when curl_easy_cleanup() has been called on this
                  handle, but it is kept around as mentioned for
                  shared_conn */
};


/*
 * This 'DynamicStatic' struct defines dynamic states that actually change
 * values in the 'UserDefined' area, which MUST be taken into consideration
 * if the UserDefined struct is cloned or similar. You can probably just
 * copy these, but each one indicate a special action on other data.
 */

struct DynamicStatic {
  char *url;        /* work URL, copied from UserDefined */
  bool url_alloc;   /* URL string is malloc()'ed */
  bool url_changed; /* set on CURL_OPT_URL, used to detect if the URL was
                       changed after the connect phase, as we allow callback
                       to change it and if so, we reconnect to use the new
                       URL instead */
  char *proxy;      /* work proxy, copied from UserDefined */
  bool proxy_alloc; /* http proxy string is malloc()'ed */
  char *referer;    /* referer string */
  bool referer_alloc; /* referer sting is malloc()ed */
  struct curl_slist *cookielist; /* list of cookie files set by
                                    curl_easy_setopt(COOKIEFILE) calls */
};

/*
 * This 'UserDefined' struct must only contain data that is set once to go
 * for many (perhaps) independent connections. Values that are generated or
 * calculated internally for the "session handle" MUST be defined within the
 * 'struct UrlState' instead. The only exceptions MUST note the changes in
 * the 'DynamicStatic' struct.
 */
struct Curl_one_easy; /* declared and used only in multi.c */
struct Curl_multi;    /* declared and used only in multi.c */

struct UserDefined {
  FILE *err;         /* the stderr user data goes here */
  void *debugdata;   /* the data that will be passed to fdebug */
  char *errorbuffer; /* store failure messages in here */
  char *proxyuserpwd;  /* Proxy <user:password>, if used */
  long proxyport; /* If non-zero, use this port number by default. If the
                     proxy string features a ":[port]" that one will override
                     this. */
  void *out;         /* the fetched file goes here */
  void *in;          /* the uploaded file is read from here */
  void *writeheader; /* write the header to this if non-NULL */
  char *set_url;     /* what original URL to work on */
  char *set_proxy;   /* proxy to use */
  long use_port;     /* which port to use (when not using default) */
  char *userpwd;     /* <user:password>, if used */
  long httpauth;     /* what kind of HTTP authentication to use (bitmask) */
  long proxyauth;    /* what kind of proxy authentication to use (bitmask) */
  char *set_range;   /* range, if used. See README for detailed specification
                        on this syntax. */
  long followlocation; /* as in HTTP Location: */
  long maxredirs;    /* maximum no. of http(s) redirects to follow, set to -1
                        for infinity */
  char *set_referer; /* custom string */
  bool free_referer; /* set TRUE if 'referer' points to a string we
                        allocated */
  char *useragent;   /* User-Agent string */
  char *encoding;    /* Accept-Encoding string */
  char *postfields;  /* if POST, set the fields' values here */
  curl_off_t postfieldsize; /* if POST, this might have a size to use instead
                               of strlen(), and then the data *may* be binary
                               (contain zero bytes) */
  char *ftpport;     /* port to send with the FTP PORT command */
  char *device;      /* local network interface/address to use */
  unsigned short localport; /* local port number to bind to */
  int localportrange; /* number of additional port numbers to test in case the
                         'localport' one can't be bind()ed */
  curl_write_callback fwrite;        /* function that stores the output */
  curl_write_callback fwrite_header; /* function that stores headers */
  curl_read_callback fread;          /* function that reads the input */
  curl_progress_callback fprogress;  /* function for progress information */
  curl_debug_callback fdebug;      /* function that write informational data */
  curl_ioctl_callback ioctl;       /* function for I/O control */
  curl_sockopt_callback fsockopt;  /* function for setting socket options */
  void *sockopt_client; /* pointer to pass to the socket options callback */

  /* the 3 curl_conv_callback functions below are used on non-ASCII hosts */
  /* function to convert from the network encoding: */
  curl_conv_callback convfromnetwork;
  /* function to convert to the network encoding: */
  curl_conv_callback convtonetwork;
  /* function to convert from UTF-8 encoding: */
  curl_conv_callback convfromutf8;

  void *progress_client; /* pointer to pass to the progress callback */
  void *ioctl_client;   /* pointer to pass to the ioctl callback */
  long timeout;         /* in seconds, 0 means no timeout */
  long connecttimeout;  /* in seconds, 0 means no timeout */
  long ftp_response_timeout; /* in seconds, 0 means no timeout */
  curl_off_t infilesize;      /* size of file to upload, -1 means unknown */
  long low_speed_limit; /* bytes/second */
  long low_speed_time;  /* number of seconds */
  curl_off_t max_send_speed; /* high speed limit in bytes/second for upload */
  curl_off_t max_recv_speed; /* high speed limit in bytes/second for download */
  curl_off_t set_resume_from;  /* continue [ftp] transfer from here */
  char *cookie;         /* HTTP cookie string to send */
  struct curl_slist *headers; /* linked list of extra headers */
  struct curl_httppost *httppost;  /* linked list of POST data */
  char *cert;           /* certificate */
  char *cert_type;      /* format for certificate (default: PEM) */
  char *key;            /* private key */
  char *key_type;       /* format for private key (default: PEM) */
  char *key_passwd;     /* plain text private key password */
  char *cookiejar;      /* dump all cookies to this file */
  bool cookiesession;   /* new cookie session? */
  bool crlf;            /* convert crlf on ftp upload(?) */
  char *ftp_account;    /* ftp account data */
  char *ftp_alternative_to_user;   /* command to send if USER/PASS fails */
  struct curl_slist *quote;     /* after connection is established */
  struct curl_slist *postquote; /* after the transfer */
  struct curl_slist *prequote; /* before the transfer, after type */
  struct curl_slist *source_quote;  /* 3rd party quote */
  struct curl_slist *source_prequote;  /* in 3rd party transfer mode - before
                                          the transfer on source host */
  struct curl_slist *source_postquote; /* in 3rd party transfer mode - after
                                          the transfer on source host */
  struct curl_slist *telnet_options; /* linked list of telnet options */
  curl_TimeCond timecondition; /* kind of time/date comparison */
  time_t timevalue;       /* what time to compare with */
  curl_closepolicy closepolicy; /* connection cache close concept */
  Curl_HttpReq httpreq;   /* what kind of HTTP request (if any) is this */
  char *customrequest;    /* HTTP/FTP request to use */
  long httpversion; /* when non-zero, a specific HTTP version requested to
                       be used in the library's request(s) */
  char *auth_host; /* if set, this is the allocated string to the host name
                    * to which to send the authorization data to, and no other
                    * host (which location-following otherwise could lead to)
                    */
  char *krb4_level; /* what security level */
  struct ssl_config_data ssl;  /* user defined SSL stuff */

  curl_proxytype proxytype; /* what kind of proxy that is in use */

  int dns_cache_timeout; /* DNS cache timeout */
  long buffer_size;      /* size of receive buffer to use */

  char *private_data; /* Private data */

  struct Curl_one_easy *one_easy; /* When adding an easy handle to a multi
                                     handle, an internal 'Curl_one_easy'
                                     struct is created and this is a pointer
                                     to the particular struct associated with
                                     this SessionHandle */

  struct curl_slist *http200aliases; /* linked list of aliases for http200 */

  long ip_version;

  curl_off_t max_filesize; /* Maximum file size to download */

  char *source_url;     /* for 3rd party transfer */
  char *source_userpwd;  /* for 3rd party transfer */

  curl_ftpfile ftp_filemethod; /* how to get to a file when FTP is used  */

/* Here follows boolean settings that define how to behave during
   this session. They are STATIC, set by libcurl users or at least initially
   and they don't change during operations. */

  bool printhost;       /* printing host name in debug info */
  bool get_filetime;
  bool tunnel_thru_httpproxy;
  bool prefer_ascii;    /* ASCII rather than binary */
  bool ftp_append;
  bool ftp_list_only;
  bool ftp_create_missing_dirs;
  bool ftp_use_port;
  bool hide_progress;
  bool http_fail_on_error;
  bool http_follow_location;
  bool http_disable_hostname_check_before_authentication;
  bool include_header;   /* include received protocol headers in data output */
  bool http_set_referer;
  bool http_auto_referer; /* set "correct" referer when following location: */
  bool opt_no_body;      /* as set with CURLOPT_NO_BODY */
  bool set_port;
  bool upload;
  enum CURL_NETRC_OPTION
       use_netrc;        /* defined in include/curl.h */
  char *netrc_file;      /* if not NULL, use this instead of trying to find
                            $HOME/.netrc */
  bool verbose;
  bool krb4;             /* kerberos4 connection requested */
  bool reuse_forbid;     /* forbidden to be reused, close after use */
  bool reuse_fresh;      /* do not re-use an existing connection  */
  bool ftp_use_epsv;     /* if EPSV is to be attempted or not */
  bool ftp_use_eprt;     /* if EPRT is to be attempted or not */
  curl_ftpssl ftp_ssl;   /* if AUTH TLS is to be attempted etc */
  curl_ftpauth ftpsslauth; /* what AUTH XXX to be attempted */
  bool no_signal;        /* do not use any signal/alarm handler */
  bool global_dns_cache; /* subject for future removal */
  bool tcp_nodelay;      /* whether to enable TCP_NODELAY or not */
  bool ignorecl;         /* ignore content length */
  bool ftp_skip_ip;      /* skip the IP address the FTP server passes on to
                            us */
  bool connect_only;     /* make connection, let application use the socket */
};

struct Names {
  struct curl_hash *hostcache;
  enum {
    HCACHE_NONE,    /* not pointing to anything */
    HCACHE_PRIVATE, /* points to our own */
    HCACHE_GLOBAL,  /* points to the (shrug) global one */
    HCACHE_MULTI,   /* points to a shared one in the multi handle */
    HCACHE_SHARED   /* points to a shared one in a shared object */
  } hostcachetype;
};

/*
 * The 'connectdata' struct MUST have all the connection oriented stuff as we
 * may have several simultaneous connections and connection structs in memory.
 *
 * The 'struct UserDefined' must only contain data that is set once to go for
 * many (perhaps) independent connections. Values that are generated or
 * calculated internally for the "session handle" must be defined within the
 * 'struct UrlState' instead.
 */

struct SessionHandle {
  struct Names dns;
  struct Curl_multi *multi;    /* if non-NULL, points to the multi handle
                                  struct to which this "belongs" */
  struct Curl_share *share;    /* Share, handles global variable mutexing */
  struct HandleData reqdata;   /* Request-specific data */
  struct UserDefined set;      /* values set by the libcurl user */
  struct DynamicStatic change; /* possibly modified userdefined data */

  struct CookieInfo *cookies;  /* the cookies, read from files and servers */
  struct Progress progress;    /* for all the progress meter data */
  struct UrlState state;       /* struct for fields used for state info and
                                  other dynamic purposes */
  struct PureInfo info;        /* stats, reports and info data */
#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
  iconv_t outbound_cd;         /* for translating to the network encoding */
  iconv_t inbound_cd;          /* for translating from the network encoding */
  iconv_t utf8_cd;             /* for translating to UTF8 */
#endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */
  unsigned int magic;          /* set to a CURLEASY_MAGIC_NUMBER */
};

#define LIBCURL_NAME "libcurl"

#endif