urldata.h

  char *oauth_bearer; /* bearer token for OAuth 2.0, allocated */

  int httpversion;        /* the HTTP version*10 reported by the server */
  int rtspversion;        /* the RTSP version*10 reported by the server */

  struct timeval now;     /* "current" time */
  struct timeval created; /* creation time */
  curl_socket_t sock[2]; /* two sockets, the second is used for the data
                            transfer when doing FTP */
  curl_socket_t tempsock[2]; /* temporary sockets for happy eyeballs */
  bool sock_accepted[2]; /* TRUE if the socket on this index was created with
                            accept() */
  Curl_recv *recv[2];
  Curl_send *send[2];

#ifdef USE_RECV_BEFORE_SEND_WORKAROUND
  struct postponed_data postponed[2]; /* two buffers for two sockets */
#endif /* USE_RECV_BEFORE_SEND_WORKAROUND */
  struct ssl_connect_data ssl[2]; /* this is for ssl-stuff */
  struct ssl_connect_data proxy_ssl[2]; /* this is for proxy ssl-stuff */
  struct ssl_primary_config ssl_config;
  struct ssl_primary_config proxy_ssl_config;
  bool tls_upgraded;

  struct ConnectBits bits;    /* various state-flags for this connection */

 /* connecttime: when connect() is called on the current IP address. Used to
    be able to track when to move on to try next IP - but only when the multi
    interface is used. */
  struct timeval connecttime;
  /* The two fields below get set in Curl_connecthost */
  int num_addr; /* number of addresses to try to connect to */
  time_t timeoutms_per_addr; /* how long time in milliseconds to spend on
                                trying to connect to each IP address */

  const struct Curl_handler *handler; /* Connection's protocol handler */
  const struct Curl_handler *given;   /* The protocol first given */

  long ip_version; /* copied from the Curl_easy at creation time */

  /**** curl_get() phase fields */

  curl_socket_t sockfd;   /* socket to read from or CURL_SOCKET_BAD */
  curl_socket_t writesockfd; /* socket to write to, it may very
                                well be the same we read from.
                                CURL_SOCKET_BAD disables */

  /** Dynamicly allocated strings, MUST be freed before this **/
  /** struct is killed.                                      **/
  struct dynamically_allocated_data {
    char *proxyuserpwd;
    char *uagent;
    char *accept_encoding;
    char *userpwd;
    char *rangeline;
    char *ref;
    char *host;
    char *cookiehost;
    char *rtsp_transport;
    char *te; /* TE: request header */
  } allocptr;

#ifdef HAVE_GSSAPI
  int sec_complete; /* if Kerberos is enabled for this connection */
  enum protection_level command_prot;
  enum protection_level data_prot;
  enum protection_level request_data_prot;
  size_t buffer_size;
  struct krb5buffer in_buffer;
  void *app_data;
  const struct Curl_sec_client_mech *mech;
  struct sockaddr_in local_addr;
#endif

#if defined(USE_KERBEROS5)    /* Consider moving some of the above GSS-API */
  struct kerberos5data krb5;  /* variables into the structure definition, */
#endif                        /* however, some of them are ftp specific. */

  /* the two following *_inuse fields are only flags, not counters in any way.
     If TRUE it means the channel is in use, and if FALSE it means the channel
     is up for grabs by one. */

  bool readchannel_inuse;  /* whether the read channel is in use by an easy
                              handle */
  bool writechannel_inuse; /* whether the write channel is in use by an easy
                              handle */
  struct curl_llist send_pipe; /* List of handles waiting to send on this
                                  pipeline */
  struct curl_llist recv_pipe; /* List of handles waiting to read their
                                  responses on this pipeline */
  char *master_buffer; /* The master buffer allocated on-demand;
                          used for pipelining. */
  size_t read_pos; /* Current read position in the master buffer */
  size_t buf_len; /* Length of the buffer?? */


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

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

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

#if defined(NTLM_WB_ENABLED)
  /* used for communication with Samba's winbind daemon helper ntlm_auth */
  curl_socket_t ntlm_auth_hlpr_socket;
  pid_t ntlm_auth_hlpr_pid;
  char *challenge_header;
  char *response_header;
#endif
#endif

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

#ifdef CURLRES_ASYNCH
  /* 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 http_conn httpc;
    struct ssh_conn sshc;
    struct tftp_state_data *tftpc;
    struct imap_conn imapc;
    struct pop3_conn pop3c;
    struct smtp_conn smtpc;
    struct rtsp_conn rtspc;
    struct smb_conn smbc;
    void *generic; /* RTMP and LDAP use this */
  } proto;

  int cselect_bits; /* bitmask of socket events */
  int waitfor;      /* current READ/WRITE bits to wait for */

#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
  int socks5_gssapi_enctype;
#endif

  /* When this connection is created, store the conditions for the local end
     bind. This is stored before the actual bind and before any connection is
     made and will serve the purpose of being used for comparison reasons so
     that subsequent bound-requested connections aren't accidentally re-using
     wrong connections. */
  char *localdev;
  unsigned short localport;
  int localportrange;
  struct http_connect_state *connect_state; /* for HTTP CONNECT */
  struct connectbundle *bundle; /* The bundle we are member of */
  int negnpn; /* APLN or NPN TLS negotiated protocol, CURL_HTTP_VERSION* */

#ifdef USE_UNIX_SOCKETS
  char *unix_domain_socket;
  bool abstract_unix_socket;
#endif
};

/* The end of connectdata. */

/*
 * Struct to keep statistical and informational data.
 * All variables in this struct must be initialized/reset in Curl_initinfo().
 */
struct PureInfo {
  int httpcode;  /* Recent HTTP, FTP, RTSP or SMTP 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. */
  bool timecond;  /* set to TRUE if the time condition didn't match, which
                     thus made the document NOT get fetched */
  long header_size;  /* size of read header(s) in bytes */
  long request_size; /* the amount of bytes sent in the request(s) */
  unsigned long proxyauthavail; /* what proxy auth types were announced */
  unsigned 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 */

  /* PureInfo members 'conn_primary_ip', 'conn_primary_port', 'conn_local_ip'
     and, 'conn_local_port' are copied over from the connectdata struct in
     order to allow curl_easy_getinfo() to return this information even when
     the session handle is no longer associated with a connection, and also
     allow curl_easy_reset() to clear this information from the session handle
     without disturbing information which is still alive, and that might be
     reused, in the connection cache. */

  char conn_primary_ip[MAX_IPADR_LEN];
  long conn_primary_port;

  char conn_local_ip[MAX_IPADR_LEN];
  long conn_local_port;

  const char *conn_scheme;
  unsigned int conn_protocol;

  struct curl_certinfo certs; /* info about the certs, only populated in
                                 OpenSSL builds. Asked for with
                                 CURLOPT_CERTINFO / CURLINFO_CERTINFO */
};


struct Progress {
  time_t 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; /* transferred so far */
  curl_off_t uploaded; /* transferred 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 */

  time_t timespent;

  curl_off_t dlspeed;
  curl_off_t ulspeed;

  time_t t_nslookup;
  time_t t_connect;
  time_t t_appconnect;
  time_t t_pretransfer;
  time_t t_starttransfer;
  time_t t_redirect;

  struct timeval start;
  struct timeval t_startsingle;
  struct timeval t_startop;
  struct timeval t_acceptdata;

  /* upload speed limit */
  struct timeval ul_limit_start;
  curl_off_t ul_limit_size;
  /* download speed limit */
  struct timeval dl_limit_start;
  curl_off_t dl_limit_size;

#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_OPTIONS,
  HTTPREQ_CUSTOM,
  HTTPREQ_LAST /* last in list */
} Curl_HttpReq;

typedef enum {
    RTSPREQ_NONE, /* first in list */
    RTSPREQ_OPTIONS,
    RTSPREQ_DESCRIBE,
    RTSPREQ_ANNOUNCE,
    RTSPREQ_SETUP,
    RTSPREQ_PLAY,
    RTSPREQ_PAUSE,
    RTSPREQ_TEARDOWN,
    RTSPREQ_GET_PARAMETER,
    RTSPREQ_SET_PARAMETER,
    RTSPREQ_RECORD,
    RTSPREQ_RECEIVE,
    RTSPREQ_LAST /* last in list */
} Curl_RtspReq;

/*
 * 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 Curl_easy struct. When the 'Curl_easy'
 * 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

struct auth {
  unsigned long want;  /* Bitmask set to the authentication methods wanted by
                          app (with CURLOPT_HTTPAUTH or CURLOPT_PROXYAUTH). */
  unsigned long picked;
  unsigned 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 multipass; /* TRUE if this is not yet authenticated but within the
                     auth multipass negotiation */
  bool iestyle; /* TRUE if digest should be done IE-style or FALSE if it should
                   be RFC compliant */
};

struct Curl_http2_dep {
  struct Curl_http2_dep *next;
  struct Curl_easy *data;
};

/*
 * This struct is for holding data that was attemped to get sent to the user's
 * callback but is held due to pausing. One instance per type (BOTH, HEADER,
 * BODY).
 */
struct tempbuf {
  char *buf;  /* allocated buffer to keep data in when a write callback
                 returns to make the connection paused */
  size_t len; /* size of the 'tempwrite' allocated buffer */
  int type;   /* type of the 'tempwrite' buffer as a bitmask that is used with
                 Curl_client_write() */
};

/* Timers */
typedef enum {
  EXPIRE_100_TIMEOUT,
  EXPIRE_ASYNC_NAME,
  EXPIRE_CONNECTTIMEOUT,
  EXPIRE_DNS_PER_NAME,
  EXPIRE_HAPPY_EYEBALLS,
  EXPIRE_MULTI_PENDING,
  EXPIRE_RUN_NOW,
  EXPIRE_SPEEDCHECK,
  EXPIRE_TIMEOUT,
  EXPIRE_TOOFAST,
  EXPIRE_LAST /* not an actual timer, used as a marker only */
} expire_id;

/*
 * One instance for each timeout an easy handle can set.
 */
struct time_node {
  struct curl_llist_element list;
  struct timeval time;
  expire_id eid;
};

struct UrlState {

  /* Points to the connection cache */
  struct conncache *conn_cache;

  /* when curl_easy_perform() is called, the multi handle is "owned" by
     the easy handle so curl_easy_cleanup() on such an easy handle will
     also close the multi handle! */
  bool multi_owned_by_easy;

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

  struct connectdata *lastconnect; /* The last connection, NULL if undefined */

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

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

  char *first_host; /* host name of the first (not followed) request.
                       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.
                    */
  int first_remote_port; /* remote port of the first (not followed) request */
  struct curl_ssl_session *session; /* array of 'max_ssl_sessions' size */
  long sessionage;                  /* number of the most recent session */
  unsigned int tempcount; /* number of entries in use in tempwrite, 0 - 3 */
  struct tempbuf tempwrite[3]; /* BOTH, HEADER, BODY */
  char *scratch; /* huge buffer[set.buffer_size*2] for 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 USE_SPNEGO
  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 */

  void *resolver; /* resolver state, if it is used in the URL state -
                     ares_channel f.e. */

#if defined(USE_OPENSSL) && defined(HAVE_OPENSSL_ENGINE_H)
  ENGINE *engine;
#endif /* USE_OPENSSL */
  struct timeval expiretime; /* set this with Curl_expire() only */
  struct Curl_tree timenode; /* for the splay stuff */
  struct curl_llist timeoutlist; /* list of pending timeouts */
  struct time_node expires[EXPIRE_LAST]; /* nodes for each expire type */

  /* a place to store the most recently 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
  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 slash_removed; /* set TRUE if the 'path' points to a path where the
                         initial URL slash separator has been taken off */
  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 */

  /* This RTSP state information survives requests and connections */
  long rtsp_next_client_CSeq; /* the session's next client CSeq */
  long rtsp_next_server_CSeq; /* the session's next server CSeq */
  long rtsp_CSeq_recv; /* most recent CSeq received */

  curl_off_t infilesize; /* size of file to upload, -1 means unknown.
                            Copied from set.filesize at start of operation */

  size_t drain; /* Increased when this stream has data to read, even if its
                   socket is not necessarily is readable. Decreased when
                   checked. */
  bool done; /* set to FALSE when Curl_init_do() is called and set to TRUE
                when multi_done() is called, to prevent multi_done() to get
                invoked twice when the multi interface is used. */

  curl_read_callback fread_func; /* read callback/function */
  void *in;                      /* CURLOPT_READDATA */

  struct Curl_easy *stream_depends_on;
  bool stream_depends_e; /* set or don't set the Exclusive bit */
  int stream_weight;
};


/*
 * 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 */
  struct curl_slist *resolve; /* set to point to the set.resolve list when
                                 this should be dealt with in pretransfer */
};

/*
 * 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_multi;    /* declared and used only in multi.c */

enum dupstring {
  STRING_CERT_ORIG,       /* client certificate file name */
  STRING_CERT_PROXY,      /* client certificate file name */
  STRING_CERT_TYPE_ORIG,  /* format for certificate (default: PEM)*/
  STRING_CERT_TYPE_PROXY, /* format for certificate (default: PEM)*/
  STRING_COOKIE,          /* HTTP cookie string to send */
  STRING_COOKIEJAR,       /* dump all cookies to this file */
  STRING_CUSTOMREQUEST,   /* HTTP/FTP/RTSP request/method to use */
  STRING_DEFAULT_PROTOCOL, /* Protocol to use when the URL doesn't specify */
  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_ORIG,        /* private key file name */
  STRING_KEY_PROXY,       /* private key file name */
  STRING_KEY_PASSWD_ORIG, /* plain text private key password */
  STRING_KEY_PASSWD_PROXY, /* plain text private key password */
  STRING_KEY_TYPE_ORIG,   /* format for private key (default: PEM) */
  STRING_KEY_TYPE_PROXY,  /* 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_PROXY,           /* proxy to use */
  STRING_PRE_PROXY,       /* pre socks 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_SSL_CAPATH_ORIG, /* CA directory name (doesn't work on windows) */
  STRING_SSL_CAPATH_PROXY, /* CA directory name (doesn't work on windows) */
  STRING_SSL_CAFILE_ORIG, /* certificate file to verify peer against */
  STRING_SSL_CAFILE_PROXY, /* certificate file to verify peer against */
  STRING_SSL_PINNEDPUBLICKEY_ORIG, /* public key file to verify peer against */
  STRING_SSL_PINNEDPUBLICKEY_PROXY, /* public key file to verify proxy */
  STRING_SSL_CIPHER_LIST_ORIG, /* list of ciphers to use */
  STRING_SSL_CIPHER_LIST_PROXY, /* 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_SSL_CRLFILE_ORIG, /* crl file to check certificate */
  STRING_SSL_CRLFILE_PROXY, /* crl file to check certificate */
  STRING_SSL_ISSUERCERT_ORIG, /* issuer cert file to check certificate */
  STRING_SSL_ISSUERCERT_PROXY, /* issuer cert file to check certificate */
  STRING_USERNAME,        /* <username>, if used */
  STRING_PASSWORD,        /* <password>, if used */
  STRING_OPTIONS,         /* <options>, if used */
  STRING_PROXYUSERNAME,   /* Proxy <username>, if used */
  STRING_PROXYPASSWORD,   /* Proxy <password>, if used */
  STRING_NOPROXY,         /* List of hosts which should not use the proxy, if
                             used */
  STRING_RTSP_SESSION_ID, /* Session ID to use */
  STRING_RTSP_STREAM_URI, /* Stream URI for this request */
  STRING_RTSP_TRANSPORT,  /* Transport for this session */
#ifdef USE_LIBSSH2
  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_SSH_HOST_PUBLIC_KEY_MD5, /* md5 of host public key in ascii hex */
  STRING_SSH_KNOWNHOSTS,  /* file name of knownhosts file */
#endif
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
  STRING_PROXY_SERVICE_NAME, /* Proxy service name */
#endif
#if !defined(CURL_DISABLE_CRYPTO_AUTH) || defined(USE_KERBEROS5) || \
    defined(USE_SPNEGO)
  STRING_SERVICE_NAME,    /* Service name */
#endif
  STRING_MAIL_FROM,
  STRING_MAIL_AUTH,

#ifdef USE_TLS_SRP
  STRING_TLSAUTH_USERNAME_ORIG,  /* TLS auth <username> */
  STRING_TLSAUTH_USERNAME_PROXY, /* TLS auth <username> */
  STRING_TLSAUTH_PASSWORD_ORIG,  /* TLS auth <password> */
  STRING_TLSAUTH_PASSWORD_PROXY, /* TLS auth <password> */
#endif
  STRING_BEARER,                /* <bearer>, if used */
#ifdef USE_UNIX_SOCKETS
  STRING_UNIX_SOCKET_PATH,      /* path to Unix socket, if used */
#endif
  STRING_TARGET,                /* CURLOPT_REQUEST_TARGET */
  /* -- end of zero-terminated strings -- */

  STRING_LASTZEROTERMINATED,

  /* -- below this are pointers to binary data that cannot be strdup'ed.
     Each such pointer must be added manually to Curl_dupset() --- */

  STRING_COPYPOSTFIELDS,  /* if POST, set the fields' values here */

  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;         /* CURLOPT_WRITEDATA */
  void *in_set;      /* CURLOPT_READDATA */
  void *writeheader; /* write the header to this if non-NULL */
  void *rtp_out;     /* write RTP to this if non-NULL */
  long use_port;     /* which port to use (when not using default) */
  unsigned long httpauth;  /* kind of HTTP authentication to use (bitmask) */
  unsigned long proxyauth; /* 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 */

  int keep_post;     /* keep POSTs as POSTs after a 30x request; each
                        bit represents a request, from 301 to 303 */
  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_write_callback fwrite_rtp;    /* function that stores interleaved RTP */
  curl_read_callback fread_func_set; /* function that reads the input */
  int is_fread_set; /* boolean, has read callback been set to non-NULL? */
  int is_fwrite_set; /* boolean, has write callback been set to non-NULL? */
  curl_progress_callback fprogress; /* OLD and deprecated progress callback  */
  curl_xferinfo_callback fxferinfo; /* progress callback */
  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;
  curl_closesocket_callback fclosesocket; /* function for closing the
                                             socket */
  void *closesocket_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 accepttimeout;   /* in milliseconds, 0 means no timeout */
  long server_response_timeout; /* in milliseconds, 0 means no timeout */
  long tftp_blksize;    /* in bytes, 0 means use default */
  bool tftp_no_options; /* do not send TFTP options requests */
  curl_off_t filesize;  /* 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_slist *proxyheaders; /* linked list of extra CONNECT headers */
  struct curl_httppost *httppost;  /* linked list of POST data */
  bool sep_headers;     /* handle host and proxy headers separately */
  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 */
  struct curl_slist *resolve;     /* list of names to add/remove from
                                     DNS cache */
  struct curl_slist *connect_to; /* list of host:port mappings to override
                                    the hostname and port to connect to */
  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) */
  bool strip_path_slash; /* strip off initial slash from path */
  struct ssl_config_data ssl;  /* user defined SSL stuff */
  struct ssl_config_data proxy_ssl;  /* user defined SSL stuff for proxy */
  struct ssl_general_config general_ssl; /* general 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_slist *http200aliases; /* linked list of aliases for http200 */

  long ipver; /* 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  */

  int ftp_create_missing_dirs; /* 1 - create directories that don't exist
                                  2 - the same but also allow MKD to fail once
                               */

  curl_sshkeycallback ssh_keyfunc; /* key matching callback */
  void *ssh_keyfunc_userp;         /* custom pointer to callback */

/* 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_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 >= 400 */
  bool http_keep_sending_on_error; /* for HTTP status codes >= 300 */
  bool http_follow_location; /* follow HTTP redirects */
  bool http_transfer_encoding; /* request compressed HTTP transfer-encoding */
  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_NOBODY */
  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 */
  bool ftp_use_pret;     /* if PRET is to be used before PASV or not */

  curl_usessl use_ssl;   /* if AUTH TLS is to be attempted etc, for FTP or
                            IMAP or POP3 or others! */
  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_id;  /* Scope id for IPv6 */
  long allowed_protocols;
  long redir_protocols;
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
  bool socks5_gssapi_nec; /* Flag to support NEC SOCKS5 server */
#endif
  struct curl_slist *mail_rcpt; /* linked list of mail recipients */
  bool sasl_ir;         /* Enable/disable SASL initial response */
  /* Common RTSP header options */
  Curl_RtspReq rtspreq; /* RTSP request type */
  long rtspversion; /* like httpversion, for RTSP */
  bool wildcardmatch; /* enable wildcard matching */
  curl_chunk_bgn_callback chunk_bgn; /* called before part of transfer
                                        starts */
  curl_chunk_end_callback chunk_end; /* called after part transferring
                                        stopped */
  curl_fnmatch_callback fnmatch; /* callback to decide which file corresponds
                                    to pattern (e.g. if WILDCARDMATCH is on) */
  void *fnmatch_data;

  long gssapi_delegation; /* GSS-API credential delegation, see the
                             documentation of CURLOPT_GSSAPI_DELEGATION */

  bool tcp_keepalive;    /* use TCP keepalives */
  long tcp_keepidle;     /* seconds in idle before sending keepalive probe */
  long tcp_keepintvl;    /* seconds between TCP keepalive probes */
  bool tcp_fastopen;     /* use TCP Fast Open */

  size_t maxconnects;  /* Max idle connections in the connection cache */

  bool ssl_enable_npn;      /* TLS NPN extension? */
  bool ssl_enable_alpn;     /* TLS ALPN extension? */
  bool path_as_is;      /* allow dotdots? */
  bool pipewait;        /* wait for pipe/multiplex status before starting a
                           new connection */
  long expect_100_timeout; /* in milliseconds */
  bool suppress_connect_headers;  /* suppress proxy CONNECT response headers
                                     from user callbacks */

  struct Curl_easy *stream_depends_on;
  bool stream_depends_e; /* set or don't set the Exclusive bit */
  int stream_weight;

  struct Curl_http2_dep *stream_dependents;

  bool abstract_unix_socket;
};

struct Names {
  struct curl_hash *hostcache;
  enum {
    HCACHE_NONE,    /* not pointing to anything */
    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 Curl_easy {
  /* first, two fields for the linked list of these */
  struct Curl_easy *next;
  struct Curl_easy *prev;

  struct connectdata *easy_conn;     /* the "unit's" connection */
  struct curl_llist_element connect_queue;
  struct curl_llist_element pipeline_queue;

  CURLMstate mstate;  /* the handle's state */
  CURLcode result;   /* previous result */

  struct Curl_message msg; /* A single posted message. */

  /* Array with the plain socket numbers this handle takes care of, in no
     particular order. Note that all sockets are added to the sockhash, where
     the state etc are also kept. This array is mostly used to detect when a
     socket is to be removed from the hash. See singlesocket(). */
  curl_socket_t sockets[MAX_SOCKSPEREASYHANDLE];
  int numsocks;

  struct Names dns;
  struct Curl_multi *multi;    /* if non-NULL, points to the multi handle
                                  struct to which this "belongs" when used by
                                  the multi interface */
  struct Curl_multi *multi_easy; /* if non-NULL, points to the multi handle
                                    struct to which this "belongs" when used
                                    by the easy interface */
  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 WildcardData wildcard; /* wildcard download state info */
  struct PureInfo info;        /* stats, reports and info data */
  struct curl_tlssessioninfo tsi; /* Information about the TLS session, only
                                     valid after a client has asked for it */
#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 /* HEADER_CURL_URLDATA_H */