urldata.h

  curl_seek_callback seek_func; /* function that seeks the input */
  void *seek_client;            /* pointer to pass to the seek() above */

  /*************** Request - specific items ************/

  /* previously this was in the urldata struct */
  curl_read_callback fread_func; /* function that reads the input */
  void *fread_in;           /* pointer to pass to the fread() above */

  struct ntlmdata ntlm;     /* NTLM differs from other authentication schemes
                               because it authenticates connections, not
                               single requests! */
  struct ntlmdata proxyntlm; /* NTLM data for proxy */

  char syserr_buf [256]; /* buffer for Curl_strerror() */

#if defined(USE_ARES) || defined(USE_THREADING_GETHOSTBYNAME) || \
    defined(USE_THREADING_GETADDRINFO)
  /* data used for the asynch name resolve callback */
  struct Curl_async async;
#endif

  /* These three are used for chunked-encoding trailer support */
  char *trailer; /* allocated buffer to store trailer in */
  int trlMax;    /* allocated buffer size */
  int trlPos;    /* index of where to store data */

  union {
    struct ftp_conn ftpc;
    struct ssh_conn sshc;
  } proto;

  int cselect_bits; /* bitmask of socket events */
};

/* The end of connectdata. */

/*
 * Struct to keep statistical and informational data.
 */
struct PureInfo {
  int httpcode;  /* Recent HTTP or FTP response code */
  int httpproxycode; /* response code from proxy when received separate */
  int httpversion; /* the http version number X.Y = X*10+Y */
  long filetime; /* If requested, this is might get set. Set to -1 if the time
                    was unretrievable. We cannot have this of type time_t,
                    since time_t is unsigned on several platforms such as
                    OpenVMS. */
  long header_size;  /* size of read header(s) in bytes */
  long request_size; /* the amount of bytes sent in the request(s) */
  long proxyauthavail; /* what proxy auth types were announced */
  long httpauthavail;  /* what host auth types were announced */
  long numconnects; /* how many new connection did libcurl created */
  char *contenttype; /* the content type of the object */
  char *wouldredirect; /* URL this would've been redirected to if asked to */
  char ip[MAX_IPADR_LEN]; /* this buffer gets the numerical ip version stored
                             at the connect *attempt* so it will get the last
                             tried connect IP even on failures */
  struct curl_certinfo certs; /* info about the certs, only populated in
                                 OpenSSL builds. Asked for with
                                 CURLOPT_CERTINFO / CURLINFO_CERTINFO */
};


struct Progress {
  long lastshow; /* time() of the last displayed progress meter or NULL to
                    force redraw at next call */
  curl_off_t size_dl; /* total expected size */
  curl_off_t size_ul; /* total expected size */
  curl_off_t downloaded; /* transfered so far */
  curl_off_t uploaded; /* transfered so far */

  curl_off_t current_speed; /* uses the currently fastest transfer */

  bool callback;  /* set when progress callback is used */
  int width; /* screen width at download start */
  int flags; /* see progress.h */

  double timespent;

  curl_off_t dlspeed;
  curl_off_t ulspeed;

  double t_nslookup;
  double t_connect;
  double t_appconnect;
  double t_pretransfer;
  double t_starttransfer;
  double t_redirect;

  struct timeval start;
  struct timeval t_startsingle;
#define CURR_TIME (5+1) /* 6 entries for 5 seconds */

  curl_off_t speeder[ CURR_TIME ];
  struct timeval speeder_time[ CURR_TIME ];
  int speeder_c;
};

typedef enum {
  HTTPREQ_NONE, /* first in list */
  HTTPREQ_GET,
  HTTPREQ_POST,
  HTTPREQ_POST_FORM, /* we make a difference internally */
  HTTPREQ_PUT,
  HTTPREQ_HEAD,
  HTTPREQ_CUSTOM,
  HTTPREQ_LAST /* last in list */
} Curl_HttpReq;

/*
 * Values that are generated, temporary or calculated internally for a
 * "session handle" must be defined within the 'struct UrlState'.  This struct
 * will be used within the SessionHandle struct. When the 'SessionHandle'
 * struct is cloned, this data MUST NOT be copied.
 *
 * Remember that any "state" information goes globally for the curl handle.
 * Session-data MUST be put in the connectdata struct and here.  */
#define MAX_CURL_USER_LENGTH 256
#define MAX_CURL_PASSWORD_LENGTH 256
#define MAX_CURL_USER_LENGTH_TXT "255"
#define MAX_CURL_PASSWORD_LENGTH_TXT "255"

struct auth {
  long want;  /* Bitmask set to the authentication methods wanted by the app
                 (with CURLOPT_HTTPAUTH or CURLOPT_PROXYAUTH). */
  long picked;
  long avail; /* bitmask for what the server reports to support for this
                 resource */
  bool done;  /* TRUE when the auth phase is done and ready to do the *actual*
                 request */
  bool multi; /* TRUE if this is not yet authenticated but within the auth
                 multipass negotiation */

};

struct conncache {
  /* 'connects' will be an allocated array with pointers. If the pointer is
     set, it holds an allocated connection. */
  struct connectdata **connects;
  long num;           /* number of entries of the 'connects' array */
  enum {
    CONNCACHE_PRIVATE, /* used for an easy handle alone */
    CONNCACHE_MULTI    /* shared within a multi handle */
  } type;
};


struct UrlState {
  enum {
    Curl_if_none,
    Curl_if_easy,
    Curl_if_multi
  } used_interface;

  struct conncache *connc; /* points to the connection cache this handle
                              uses */

  /* buffers to store authentication data in, as parsed from input options */
  struct timeval keeps_speed; /* for the progress meter really */

  long lastconnect;  /* index of most recent connect or -1 if undefined */

  char *headerbuff; /* allocated buffer to store headers in */
  size_t headersize;   /* size of the allocation */

  char buffer[BUFSIZE+1]; /* download buffer */
  char uploadbuffer[BUFSIZE+1]; /* upload buffer */
  curl_off_t current_speed;  /* the ProgressShow() funcion sets this,
                                bytes / second */
  bool this_is_a_follow; /* this is a followed Location: request */

  char *first_host; /* if set, this should be the host name that we will
                       sent authorization to, no else. Used to make Location:
                       following not keep sending user+password... This is
                       strdup() data.
                    */
  struct curl_ssl_session *session; /* array of 'numsessions' size */
  long sessionage;                  /* number of the most recent session */
  char *tempwrite;      /* allocated buffer to keep data in when a write
                           callback returns to make the connection paused */
  size_t tempwritesize; /* size of the 'tempwrite' allocated buffer */
  int tempwritetype;    /* type of the 'tempwrite' buffer as a bitmask that is
                           used with Curl_client_write() */
  char *scratch; /* huge buffer[BUFSIZE*2] when doing upload CRLF replacing */
  bool errorbuf; /* Set to TRUE if the error buffer is already filled in.
                    This must be set to FALSE every time _easy_perform() is
                    called. */
  int os_errno;  /* filled in with errno whenever an error occurs */
#ifdef HAVE_SIGNAL
  /* storage for the previous bag^H^H^HSIGPIPE signal handler :-) */
  void (*prev_signal)(int sig);
#endif
  bool allow_port; /* Is set.use_port allowed to take effect or not. This
                      is always set TRUE when curl_easy_perform() is called. */
  struct digestdata digest;      /* state data for host Digest auth */
  struct digestdata proxydigest; /* state data for proxy Digest auth */

#ifdef HAVE_GSSAPI
  struct negotiatedata negotiate; /* state data for host Negotiate auth */
  struct negotiatedata proxyneg; /* state data for proxy Negotiate auth */
#endif

  struct auth authhost;  /* auth details for host */
  struct auth authproxy; /* auth details for proxy */

  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;

  int httpversion;       /* the lowest HTTP version*10 reported by any server
                            involved in this request */
  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 */

#if !defined(WIN32) && !defined(MSDOS) && !defined(__EMX__) && \
    !defined(__SYMBIAN32__)
/* 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 */
  char *pathbuffer;/* allocated buffer to store the URL's path part in */
  char *path;      /* path to use, points to somewhere within the pathbuffer
                      area */

  bool use_range;
  bool rangestringalloc; /* the range string is malloc()'ed */

  char *range; /* range, if used. See README for detailed specification on
                  this syntax. */
  curl_off_t resume_from; /* continue [ftp] transfer from here */

  /* Protocol specific data.
   *
   *************************************************************************
   * Note that this data will be REMOVED after each request, so anything that
   * should be kept/stored on a per-connection basis and thus live for the
   * next requst on the same connection MUST be put in the connectdata struct!
   *************************************************************************/
  union {
    struct HTTP *http;
    struct HTTP *https;  /* alias, just for the sake of being more readable */
    struct FTP *ftp;
    void *tftp;        /* private for tftp.c-eyes only */
    struct FILEPROTO *file;
    void *telnet;        /* private for telnet.c-eyes only */
    void *generic;
    struct SSHPROTO *ssh;
  } proto;
  /* current user of this SessionHandle instance, or NULL */
  struct connectdata *current_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 */
  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.
 * Character pointer fields point to dynamic storage, unless otherwise stated.
 */
struct Curl_one_easy; /* declared and used only in multi.c */
struct Curl_multi;    /* declared and used only in multi.c */

enum dupstring {
  STRING_CERT,            /* client certificate file name */
  STRING_CERT_TYPE,       /* format for certificate (default: PEM)*/
  STRING_COOKIE,          /* HTTP cookie string to send */
  STRING_COOKIEJAR,       /* dump all cookies to this file */
  STRING_CUSTOMREQUEST,   /* HTTP/FTP request/method to use */
  STRING_DEVICE,          /* local network interface/address to use */
  STRING_ENCODING,        /* Accept-Encoding string */
  STRING_FTP_ACCOUNT,     /* ftp account data */
  STRING_FTP_ALTERNATIVE_TO_USER, /* command to send if USER/PASS fails */
  STRING_FTPPORT,         /* port to send with the FTP PORT command */
  STRING_KEY,             /* private key file name */
  STRING_KEY_PASSWD,      /* plain text private key password */
  STRING_KEY_TYPE,        /* format for private key (default: PEM) */
  STRING_KRB_LEVEL,       /* krb security level */
  STRING_NETRC_FILE,      /* if not NULL, use this instead of trying to find
                             $HOME/.netrc */
  STRING_COPYPOSTFIELDS,  /* if POST, set the fields' values here */
  STRING_PROXY,           /* proxy to use */
  STRING_SET_RANGE,       /* range, if used */
  STRING_SET_REFERER,     /* custom string for the HTTP referer field */
  STRING_SET_URL,         /* what original URL to work on */
  STRING_SSH_PRIVATE_KEY, /* path to the private key file for auth */
  STRING_SSH_PUBLIC_KEY,  /* path to the public key file for auth */
  STRING_SSL_CAPATH,      /* CA directory name (doesn't work on windows) */
  STRING_SSL_CAFILE,      /* certificate file to verify peer against */
  STRING_SSL_CIPHER_LIST, /* list of ciphers to use */
  STRING_SSL_EGDSOCKET,   /* path to file containing the EGD daemon socket */
  STRING_SSL_RANDOM_FILE, /* path to file containing "random" data */
  STRING_USERAGENT,       /* User-Agent string */
  STRING_SSH_HOST_PUBLIC_KEY_MD5, /* md5 of host public key in ascii hex */
  STRING_SSL_CRLFILE,     /* crl file to check certificate */
  STRING_SSL_ISSUERCERT,  /* issuer cert file to check certificate */
  STRING_USERNAME,        /* <username>, if used */
  STRING_PASSWORD,        /* <password>, if used */
  STRING_PROXYUSERNAME,   /* Proxy <username>, if used */
  STRING_PROXYPASSWORD,   /* Proxy <password>, if used */

  /* -- end of strings -- */
  STRING_LAST /* not used, just an end-of-list marker */
};

struct UserDefined {
  FILE *err;         /* the stderr user data goes here */
  void *debugdata;   /* the data that will be passed to fdebug */
  char *errorbuffer; /* (Static) store failure messages in here */
  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 */
  long use_port;     /* which port to use (when not using default) */
  long httpauth;     /* what kind of HTTP authentication to use (bitmask) */
  long proxyauth;    /* what kind of proxy authentication to use (bitmask) */
  long followlocation; /* as in HTTP Location: */
  long maxredirs;    /* maximum no. of http(s) redirects to follow, set to -1
                        for infinity */
  bool post301;      /* Obey RFC 2616/10.3.2 and keep POSTs as POSTs after a
                        301 */
  bool post302;      /* keep POSTs as POSTs after a 302 */
  bool free_referer; /* set TRUE if 'referer' points to a string we
                        allocated */
  void *postfields;  /* if POST, set the fields' values here */
  curl_seek_callback seek_func;      /* function that seeks the input */
  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) */
  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_func;   /* function that stores the output */
  curl_write_callback fwrite_header; /* function that stores headers */
  curl_read_callback fread_func;     /* 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_func;  /* 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 */
  curl_opensocket_callback fopensocket; /* function for checking/translating
                                           the address and opening the socket */
  void* opensocket_client;

  void *seek_client;    /* pointer to pass to the seek 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 milliseconds, 0 means no timeout */
  long connecttimeout;  /* in milliseconds, 0 means no timeout */
  long ftp_response_timeout; /* in milliseconds, 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 */
  struct curl_slist *headers; /* linked list of extra headers */
  struct curl_httppost *httppost;  /* linked list of POST data */
  bool cookiesession;   /* new cookie session? */
  bool crlf;            /* convert crlf on ftp upload(?) */
  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_HttpReq httpreq;   /* what kind of HTTP request (if any) is this */
  long httpversion; /* when non-zero, a specific HTTP version requested to
                       be used in the library's request(s) */
  struct ssl_config_data ssl;  /* user defined SSL stuff */
  curl_proxytype proxytype; /* what kind of proxy that is in use */
  long dns_cache_timeout; /* DNS cache timeout */
  long buffer_size;      /* size of receive buffer to use */
  void *private_data; /* application-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; /* the CURL_IPRESOLVE_* defines in the public header file
                      0 - whatever, 1 - v2, 2 - v6 */

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

  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;     /* get the time and get of the remote file */
  bool tunnel_thru_httpproxy; /* use CONNECT through a HTTP proxy */
  bool prefer_ascii;     /* ASCII rather than binary */
  bool ftp_append;       /* append, not overwrite, on upload */
  bool ftp_list_only;    /* switch FTP command for listing directories */
  bool ftp_create_missing_dirs; /* create directories that don't exist */
  bool ftp_use_port;     /* use the FTP PORT command */
  bool hide_progress;    /* don't use the progress meter */
  bool http_fail_on_error;  /* fail on HTTP error codes >= 300 */
  bool http_follow_location; /* follow HTTP redirects */
  bool http_disable_hostname_check_before_authentication;
  bool include_header;   /* include received protocol headers in data output */
  bool http_set_referer; /* is a custom referer used */
  bool http_auto_referer; /* set "correct" referer when following location: */
  bool opt_no_body;      /* as set with CURLOPT_NO_BODY */
  bool set_port;         /* custom port number used */
  bool upload;           /* upload request */
  enum CURL_NETRC_OPTION
       use_netrc;        /* defined in include/curl.h */
  bool verbose;          /* output verbosity */
  bool krb;              /* kerberos 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_usessl ftp_ssl;   /* if AUTH TLS is to be attempted etc */
  curl_ftpauth ftpsslauth; /* what AUTH XXX to be attempted */
  curl_ftpccc ftp_ccc;   /* FTP CCC options */
  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 */
  long ssh_auth_types;   /* allowed SSH auth types */
  bool http_te_skip;     /* pass the raw body data to the user, even when
                            transfer-encoded (chunked, compressed) */
  bool http_ce_skip;     /* pass the raw body data to the user, even when
                            content-encoded (chunked, compressed) */
  long new_file_perms;    /* Permissions to use when creating remote files */
  long new_directory_perms; /* Permissions to use when creating remote dirs */
  bool proxy_transfer_mode; /* set transfer mode (;type=<a|i>) when doing FTP
                               via an HTTP proxy */
  char *str[STRING_LAST]; /* array of strings, pointing to allocated memory */
  unsigned int scope;    /* address scope for IPv6 */
};

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_one_easy *multi_pos; /* if non-NULL, points to its position
                                      in multi controlling structure to assist
                                      in removal. */
  struct Curl_share *share;    /* Share, handles global variable mutexing */
  struct SingleRequest req;    /* 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.
                                  NOTE that the 'cookie' field in the
                                  UserDefined struct defines if the "engine"
                                  is to be used or not. */
  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