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curl/lib/urldata.h
Daniel Stenberg cffebd7fd6 Markus Koetter filed debian bug report #355715 which identified a problem 
with the multi interface and multi-part formposts. The fix from February
22nd could make the Curl_done() function get called twice on the same
connection and it was not designed for that and thus tried to call free() on
an already freed memory area!
2006-03-07 23:11:41 +00:00

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#ifndef __URLDATA_H
#define __URLDATA_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
/* This file is for lib internal stuff */
#include "setup.h"
#define PORT_FTP 21
#define PORT_FTPS 990
#define PORT_TELNET 23
#define PORT_HTTP 80
#define PORT_HTTPS 443
#define PORT_DICT 2628
#define PORT_LDAP 389
#define PORT_TFTP 69
#define DICT_MATCH "/MATCH:"
#define DICT_MATCH2 "/M:"
#define DICT_MATCH3 "/FIND:"
#define DICT_DEFINE "/DEFINE:"
#define DICT_DEFINE2 "/D:"
#define DICT_DEFINE3 "/LOOKUP:"
#define CURL_DEFAULT_USER "anonymous"
#define CURL_DEFAULT_PASSWORD "curl_by_daniel@haxx.se"
#include "cookie.h"
#include "formdata.h"
#ifdef USE_SSLEAY
#ifdef USE_OPENSSL
#include "openssl/rsa.h"
#include "openssl/crypto.h"
#include "openssl/x509.h"
#include "openssl/pem.h"
#include "openssl/ssl.h"
#include "openssl/err.h"
#ifdef HAVE_OPENSSL_ENGINE_H
#include <openssl/engine.h>
#endif
#ifdef HAVE_OPENSSL_PKCS12_H
#include <openssl/pkcs12.h>
#endif
#else /* SSLeay-style includes */
#include "rsa.h"
#include "crypto.h"
#include "x509.h"
#include "pem.h"
#include "ssl.h"
#include "err.h"
#endif /* USE_OPENSSL */
#endif /* USE_SSLEAY */
#ifdef USE_GNUTLS
#include <gnutls/gnutls.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include "timeval.h"
#ifdef HAVE_ZLIB_H
#include <zlib.h> /* for content-encoding */
#endif
#ifdef USE_ARES
#include <ares.h>
#endif
#include <curl/curl.h>
#include "http_chunks.h" /* for the structs and enum stuff */
#include "hostip.h"
#include "hash.h"
#ifdef HAVE_GSSAPI
# ifdef HAVE_GSSGNU
# include <gss.h>
# elif defined HAVE_GSSMIT
# include <gssapi/gssapi.h>
# include <gssapi/gssapi_generic.h>
# else
# include <gssapi.h>
# endif
#endif
/* Download buffer size, keep it fairly big for speed reasons */
#define BUFSIZE CURL_MAX_WRITE_SIZE
/* Initial size of the buffer to store headers in, it'll be enlarged in case
of need. */
#define HEADERSIZE 256
/* Just a convenience macro to get the larger value out of two given.
We prefix with CURL to prevent name collisions. */
#define CURLMAX(x,y) ((x)>(y)?(x):(y))
#ifdef HAVE_KRB4
/* Types needed for krb4-ftp connections */
struct krb4buffer {
void *data;
size_t size;
size_t index;
int eof_flag;
};
enum protection_level {
prot_clear,
prot_safe,
prot_confidential,
prot_private
};
#endif
/* struct for data related to each SSL connection */
struct ssl_connect_data {
bool use; /* use ssl encrypted communications TRUE/FALSE */
#ifdef USE_SSLEAY
/* these ones requires specific SSL-types */
SSL_CTX* ctx;
SSL* handle;
X509* server_cert;
#endif /* USE_SSLEAY */
#ifdef USE_GNUTLS
gnutls_session session;
gnutls_anon_client_credentials cred;
#endif /* USE_GNUTLS */
};
struct ssl_config_data {
long version; /* what version the client wants to use */
long certverifyresult; /* result from the certificate verification */
long verifypeer; /* set TRUE if this is desired */
long verifyhost; /* 0: no verify
1: check that CN exists
2: CN must match hostname */
char *CApath; /* DOES NOT WORK ON WINDOWS */
char *CAfile; /* cerficate to verify peer against */
char *random_file; /* path to file containing "random" data */
char *egdsocket; /* path to file containing the EGD daemon socket */
char *cipher_list; /* list of ciphers to use */
long numsessions; /* SSL session id cache size */
curl_ssl_ctx_callback fsslctx; /* function to initialize ssl ctx */
void *fsslctxp; /*parameter for call back */
};
/* information stored about one single SSL session */
struct curl_ssl_session {
char *name; /* host name for which this ID was used */
void *sessionid; /* as returned from the SSL layer */
size_t idsize; /* if known, otherwise 0 */
long age; /* just a number, the higher the more recent */
unsigned short remote_port; /* remote port to connect to */
struct ssl_config_data ssl_config; /* setup for this session */
};
/* Struct used for Digest challenge-response authentication */
struct digestdata {
char *nonce;
char *cnonce;
char *realm;
int algo;
bool stale; /* set true for re-negotiation */
char *opaque;
char *qop;
char *algorithm;
int nc; /* nounce count */
};
typedef enum {
NTLMSTATE_NONE,
NTLMSTATE_TYPE1,
NTLMSTATE_TYPE2,
NTLMSTATE_TYPE3,
NTLMSTATE_LAST
} curlntlm;
#ifdef USE_WINDOWS_SSPI
/* When including these headers, you must define either SECURITY_WIN32
* or SECURITY_KERNEL, indicating who is compiling the code.
*/
#define SECURITY_WIN32 1
#include <security.h>
#include <sspi.h>
#include <rpc.h>
#endif
/* Struct used for NTLM challenge-response authentication */
struct ntlmdata {
curlntlm state;
#ifdef USE_WINDOWS_SSPI
CredHandle handle;
CtxtHandle c_handle;
SEC_WINNT_AUTH_IDENTITY identity;
SEC_WINNT_AUTH_IDENTITY *p_identity;
int has_handles;
void *type_2;
int n_type_2;
#else
unsigned char nonce[8];
#endif
};
#ifdef HAVE_GSSAPI
struct negotiatedata {
bool gss; /* Whether we're processing GSS-Negotiate or Negotiate */
const char* protocol; /* "GSS-Negotiate" or "Negotiate" */
OM_uint32 status;
gss_ctx_id_t context;
gss_name_t server_name;
gss_buffer_desc output_token;
};
#endif
/****************************************************************************
* HTTP unique setup
***************************************************************************/
struct HTTP {
struct FormData *sendit;
curl_off_t postsize; /* off_t to handle large file sizes */
char *postdata;
const char *p_pragma; /* Pragma: string */
const char *p_accept; /* Accept: string */
curl_off_t readbytecount;
curl_off_t writebytecount;
/* For FORM posting */
struct Form form;
struct Curl_chunker chunk;
struct back {
curl_read_callback fread; /* backup storage for fread pointer */
void *fread_in; /* backup storage for fread_in pointer */
char *postdata;
curl_off_t postsize;
} backup;
enum {
HTTPSEND_NADA, /* init */
HTTPSEND_REQUEST, /* sending a request */
HTTPSEND_BODY, /* sending body */
HTTPSEND_LAST /* never use this */
} sending;
void *send_buffer; /* used if the request couldn't be sent in one chunk,
points to an allocated send_buffer struct */
};
/****************************************************************************
* FTP unique setup
***************************************************************************/
typedef enum {
FTP_STOP, /* do nothing state, stops the state machine */
FTP_WAIT220, /* waiting for the inintial 220 response immediately after
a connect */
FTP_AUTH,
FTP_USER,
FTP_PASS,
FTP_ACCT,
FTP_PBSZ,
FTP_PROT,
FTP_PWD,
FTP_QUOTE, /* waiting for a response to a command sent in a quote list */
FTP_RETR_PREQUOTE,
FTP_STOR_PREQUOTE,
FTP_POSTQUOTE,
FTP_CWD, /* change dir */
FTP_MKD, /* if the dir didn't exist */
FTP_MDTM, /* to figure out the datestamp */
FTP_TYPE, /* to set type when doing a head-like request */
FTP_LIST_TYPE, /* set type when about to do a dir list */
FTP_RETR_TYPE, /* set type when about to RETR a file */
FTP_STOR_TYPE, /* set type when about to STOR a file */
FTP_SIZE, /* get the remote file's size for head-like request */
FTP_RETR_SIZE, /* get the remote file's size for RETR */
FTP_STOR_SIZE, /* get the size for (resumed) STOR */
FTP_REST, /* when used to check if the server supports it in head-like */
FTP_RETR_REST, /* when asking for "resume" in for RETR */
FTP_PORT, /* generic state for PORT, LPRT and EPRT, check count1 */
FTP_PASV, /* generic state for PASV and EPSV, check count1 */
FTP_LIST, /* generic state for LIST, NLST or a custom list command */
FTP_RETR,
FTP_STOR, /* generic state for STOR and APPE */
FTP_QUIT,
FTP_LAST /* never used */
} ftpstate;
typedef enum {
FTPFILE_MULTICWD = 1, /* as defined by RFC1738 */
FTPFILE_NOCWD = 2, /* use SIZE / RETR / STOR on the full path */
FTPFILE_SINGLECWD = 3 /* make one CWD, then SIZE / RETR / STOR on the file */
} curl_ftpfile;
struct FTP {
curl_off_t *bytecountp;
char *user; /* user name string */
char *passwd; /* password string */
char *urlpath; /* the originally given path part of the URL */
char **dirs; /* realloc()ed array for path components */
int dirdepth; /* number of entries used in the 'dirs' array */
int diralloc; /* number of entries allocated for the 'dirs' array */
char *file; /* decoded file */
char *entrypath; /* the PWD reply when we logged on */
char *cache; /* data cache between getresponse()-calls */
curl_off_t cache_size; /* size of cache in bytes */
bool dont_check; /* Set to TRUE to prevent the final (post-transfer)
file size and 226/250 status check. It should still
read the line, just ignore the result. */
bool no_transfer; /* nothing was transfered, (possibly because a resumed
transfer already was complete) */
long response_time; /* When no timeout is given, this is the amount of
seconds we await for an FTP response. Initialized
in Curl_ftp_connect() */
bool ctl_valid; /* Tells Curl_ftp_quit() whether or not to do anything. If
the connection has timed out or been closed, this
should be FALSE when it gets to Curl_ftp_quit() */
bool cwddone; /* if it has been determined that the proper CWD combo
already has been done */
bool cwdfail; /* set TRUE if a CWD command fails, as then we must prevent
caching the current directory */
char *prevpath; /* conn->path from the previous transfer */
size_t nread_resp; /* number of bytes currently read of a server response */
char *linestart_resp; /* line start pointer for the FTP server response
reader function */
int count1; /* general purpose counter for the state machine */
int count2; /* general purpose counter for the state machine */
int count3; /* general purpose counter for the state machine */
char *sendthis; /* allocated pointer to a buffer that is to be sent to the
ftp server */
size_t sendleft; /* number of bytes left to send from the sendthis buffer */
size_t sendsize; /* total size of the sendthis buffer */
struct timeval response; /* set to Curl_tvnow() when a command has been sent
off, used to time-out response reading */
ftpstate state; /* always use ftp.c:state() to change state! */
curl_off_t downloadsize;
};
/****************************************************************************
* FILE unique setup
***************************************************************************/
struct FILEPROTO {
char *path; /* the path we operate on */
char *freepath; /* pointer to the allocated block we must free, this might
differ from the 'path' pointer */
int fd; /* open file descriptor to read from! */
};
/*
* Boolean values that concerns this connection.
*/
struct ConnectBits {
bool close; /* if set, we close the connection after this request */
bool reuse; /* if set, this is a re-used connection */
bool chunk; /* if set, this is a chunked transfer-encoding */
bool httpproxy; /* if set, this transfer is done through a http proxy */
bool user_passwd; /* do we use user+password for this connection? */
bool proxy_user_passwd; /* user+password for the proxy? */
bool ipv6_ip; /* we communicate with a remote site specified with pure IPv6
IP address */
bool ipv6; /* we communicate with a site using an IPv6 address */
bool use_range;
bool rangestringalloc; /* the range string is malloc()'ed */
bool do_more; /* this is set TRUE if the ->curl_do_more() function is
supposed to be called, after ->curl_do() */
bool upload_chunky; /* set TRUE if we are doing chunked transfer-encoding
on upload */
bool getheader; /* TRUE if header parsing is wanted */
bool forbidchunk; /* used only to explicitly forbid chunk-upload for
specific upload buffers. See readmoredata() in
http.c for details. */
bool tcpconnect; /* the TCP layer (or simimlar) is connected, this is set
the first time on the first connect function call */
bool protoconnstart;/* the protocol layer has STARTED its operation after
the TCP layer connect */
bool retry; /* this connection is about to get closed and then
re-attempted at another connection. */
bool no_body; /* CURLOPT_NO_BODY (or similar) was set */
bool tunnel_proxy; /* if CONNECT is used to "tunnel" through the proxy.
This is implicit when SSL-protocols are used through
proxies, but can also be enabled explicitly by
apps */
bool authneg; /* TRUE when the auth phase has started, which means
that we are creating a request with an auth header,
but it is not the final request in the auth
negotiation. */
bool rewindaftersend;/* TRUE when the sending couldn't be stopped even
though it will be discarded. When the whole send
operation is done, we must call the data rewind
callback. */
bool ftp_use_epsv; /* As set with CURLOPT_FTP_USE_EPSV, but if we find out
EPSV doesn't work we disable it for the forthcoming
requests */
bool ftp_use_eprt; /* As set with CURLOPT_FTP_USE_EPRT, but if we find out
EPRT doesn't work we disable it for the forthcoming
requests */
bool netrc; /* name+password provided by netrc */
bool trailerHdrPresent; /* Set when Trailer: header found in HTTP response.
Required to determine whether to look for trailers
in case of Transfer-Encoding: chunking */
bool done; /* set to FALSE when Curl_do() is called and set to TRUE
when Curl_done() is called, to prevent Curl_done() to
get invoked twice when the multi interface is
used. */
};
struct hostname {
char *rawalloc; /* allocated "raw" version of the name */
char *encalloc; /* allocated IDN-encoded version of the name */
char *name; /* name to use internally, might be encoded, might be raw */
char *dispname; /* name to display, as 'name' might be encoded */
};
/*
* This struct is all the previously local variables from Curl_perform() moved
* to struct to allow the function to return and get re-invoked better without
* losing state.
*/
struct Curl_transfer_keeper {
curl_off_t bytecount; /* total number of bytes read */
curl_off_t writebytecount; /* number of bytes written */
struct timeval start; /* transfer started at this time */
struct timeval now; /* current time */
bool header; /* incoming data has HTTP header */
enum {
HEADER_NORMAL, /* no bad header at all */
HEADER_PARTHEADER, /* part of the chunk is a bad header, the rest
is normal data */
HEADER_ALLBAD /* all was believed to be header */
} badheader; /* the header was deemed bad and will be
written as body */
int headerline; /* counts header lines to better track the
first one */
char *hbufp; /* points at *end* of header line */
size_t hbuflen;
char *str; /* within buf */
char *str_start; /* within buf */
char *end_ptr; /* within buf */
char *p; /* within headerbuff */
bool content_range; /* set TRUE if Content-Range: was found */
curl_off_t offset; /* possible resume offset read from the
Content-Range: header */
int httpcode; /* error code from the 'HTTP/1.? XXX' line */
int httpversion; /* the HTTP version*10 */
struct timeval start100; /* time stamp to wait for the 100 code from */
bool write_after_100_header; /* TRUE = we enable the write after we
received a 100-continue/timeout or
FALSE = directly */
bool wait100_after_headers; /* TRUE = after the request-headers have been
sent off properly, we go into the wait100
state, FALSE = don't */
int content_encoding; /* What content encoding. sec 3.5, RFC2616. */
#define IDENTITY 0 /* No encoding */
#define DEFLATE 1 /* zlib delfate [RFC 1950 & 1951] */
#define GZIP 2 /* gzip algorithm [RFC 1952] */
#define COMPRESS 3 /* Not handled, added for completeness */
#ifdef HAVE_LIBZ
bool zlib_init; /* True if zlib already initialized;
undefined if Content-Encoding header. */
z_stream z; /* State structure for zlib. */
#endif
time_t timeofdoc;
long bodywrites;
char *buf;
char *uploadbuf;
curl_socket_t maxfd;
int keepon;
bool upload_done; /* set to TRUE when doing chunked transfer-encoding upload
and we're uploading the last chunk */
bool ignorebody; /* we read a response-body but we ignore it! */
bool ignorecl; /* This HTTP response has no body so we ignore the Content-
Length: header */
};
#if defined(USE_ARES) || defined(USE_THREADING_GETHOSTBYNAME) || \
defined(USE_THREADING_GETADDRINFO)
struct Curl_async {
char *hostname;
int port;
struct Curl_dns_entry *dns;
bool done; /* set TRUE when the lookup is complete */
int status; /* if done is TRUE, this is the status from the callback */
void *os_specific; /* 'struct thread_data' for Windows */
};
#endif
#define FIRSTSOCKET 0
#define SECONDARYSOCKET 1
/*
* The connectdata struct contains all fields and variables that should be
* unique for an entire connection.
*/
struct connectdata {
/**** Fields set when inited and not modified again */
struct SessionHandle *data; /* link to the root CURL struct */
long connectindex; /* what index in the connects index this particular
struct has */
long protocol; /* PROT_* flags concerning the protocol set */
#define PROT_MISSING (1<<0)
#define PROT_HTTP (1<<2)
#define PROT_HTTPS (1<<3)
#define PROT_FTP (1<<4)
#define PROT_TELNET (1<<5)
#define PROT_DICT (1<<6)
#define PROT_LDAP (1<<7)
#define PROT_FILE (1<<8)
#define PROT_TFTP (1<<11)
#define PROT_FTPS (1<<9)
#define PROT_SSL (1<<10) /* protocol requires SSL */
/* 'dns_entry' is the particular host we use. This points to an entry in the
DNS cache and it will not get pruned while locked. It gets unlocked in
Curl_done() */
struct Curl_dns_entry *dns_entry;
/* 'ip_addr' is the particular IP we connected to. It points to a struct
within the DNS cache, so this pointer is only valid as long as the DNS
cache entry remains locked. It gets unlocked in Curl_done() */
Curl_addrinfo *ip_addr;
/* 'ip_addr_str' is the ip_addr data as a human readable malloc()ed string.
It remains available as long as the connection does, which is longer than
the ip_addr itself. Set with Curl_store_ip_addr() when ip_addr has been
set. */
char *ip_addr_str;
char protostr[16]; /* store the protocol string in this buffer */
int socktype; /* SOCK_STREAM or SOCK_DGRAM */
struct hostname host;
struct hostname proxy;
char *pathbuffer;/* allocated buffer to store the URL's path part in */
char *path; /* path to use, points to somewhere within the pathbuffer
area */
long port; /* which port to use locally */
unsigned short remote_port; /* what remote port to connect to,
not the proxy port! */
curl_off_t bytecount;
long headerbytecount; /* only count received headers */
long deductheadercount; /* this amount of bytes doesn't count when we check
if anything has been transfered at the end of
a connection. We use this counter to make only
a 100 reply (without a following second response
code) result in a CURLE_GOT_NOTHING error code */
char *range; /* range, if used. See README for detailed specification on
this syntax. */
curl_off_t resume_from; /* continue [ftp] transfer from here */
char *user; /* user name string, allocated */
char *passwd; /* password string, allocated */
char *proxyuser; /* proxy user name string, allocated */
char *proxypasswd; /* proxy password string, allocated */
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_off_t maxdownload; /* in bytes, the maximum amount of data to fetch, 0
means unlimited */
struct ssl_connect_data ssl[2]; /* this is for ssl-stuff */
struct ssl_config_data ssl_config;
struct ConnectBits bits; /* various state-flags for this connection */
/* These two functions MUST be set by the curl_connect() function to be
be protocol dependent */
CURLcode (*curl_do)(struct connectdata *, bool *done);
CURLcode (*curl_done)(struct connectdata *, CURLcode);
/* If the curl_do() function is better made in two halves, this
* curl_do_more() function will be called afterwards, if set. For example
* for doing the FTP stuff after the PASV/PORT command.
*/
CURLcode (*curl_do_more)(struct connectdata *);
/* This function *MAY* be set to a protocol-dependent function that is run
* after the connect() and everything is done, as a step in the connection.
* The 'done' pointer points to a bool that should be set to TRUE if the
* function completes before return. If it doesn't complete, the caller
* should call the curl_connecting() function until it is.
*/
CURLcode (*curl_connect)(struct connectdata *, bool *done);
/* See above. Currently only used for FTP. */
CURLcode (*curl_connecting)(struct connectdata *, bool *done);
CURLcode (*curl_doing)(struct connectdata *, bool *done);
/* Called from the multi interface during the PROTOCONNECT phase, and it
should then return a proper fd set */
CURLcode (*curl_proto_fdset)(struct connectdata *conn,
fd_set *read_fd_set,
fd_set *write_fd_set,
int *max_fdp);
/* Called from the multi interface during the DOING phase, and it should
then return a proper fd set */
CURLcode (*curl_doing_fdset)(struct connectdata *conn,
fd_set *read_fd_set,
fd_set *write_fd_set,
int *max_fdp);
/* This function *MAY* be set to a protocol-dependent function that is run
* by the curl_disconnect(), as a step in the disconnection.
*/
CURLcode (*curl_disconnect)(struct connectdata *);
/* This function *MAY* be set to a protocol-dependent function that is run
* in the curl_close() function if protocol-specific cleanups are required.
*/
CURLcode (*curl_close)(struct connectdata *);
/**** curl_get() phase fields */
/* READ stuff */
curl_socket_t sockfd; /* socket to read from or CURL_SOCKET_BAD */
curl_off_t size; /* -1 if unknown at this point */
curl_off_t *bytecountp; /* return number of bytes read or NULL */
/* WRITE stuff */
curl_socket_t writesockfd; /* socket to write to, it may very
well be the same we read from.
CURL_SOCKET_BAD disables */
curl_off_t *writebytecountp; /* return number of bytes written or NULL */
/** Dynamicly allocated strings, may need to be freed before this **/
/** struct is killed. **/
struct dynamically_allocated_data {
char *proxyuserpwd; /* free later if not NULL! */
char *uagent; /* free later if not NULL! */
char *accept_encoding; /* free later if not NULL! */
char *userpwd; /* free later if not NULL! */
char *rangeline; /* free later if not NULL! */
char *ref; /* free later if not NULL! */
char *host; /* free later if not NULL */
char *cookiehost; /* free later if not NULL */
} allocptr;
char *newurl; /* This can only be set if a Location: was in the
document headers */
int sec_complete; /* if krb4 is enabled for this connection */
#ifdef HAVE_KRB4
enum protection_level command_prot;
enum protection_level data_prot;
enum protection_level request_data_prot;
size_t buffer_size;
struct krb4buffer in_buffer, out_buffer;
void *app_data;
const struct Curl_sec_client_mech *mech;
struct sockaddr_in local_addr;
#endif
/*************** Request - specific items ************/
/* previously this was in the urldata 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;
} proto;
/* This struct is inited when needed */
struct Curl_transfer_keeper keep;
/* 'upload_present' is used to keep a byte counter of how much data there is
still left in the buffer, aimed for upload. */
ssize_t upload_present;
/* 'upload_fromhere' is used as a read-pointer when we uploaded parts of a
buffer, so the next read should read from where this pointer points to,
and the 'upload_present' contains the number of bytes available at this
position */
char *upload_fromhere;
curl_read_callback fread; /* 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
struct connectdata *sec_conn; /* secondary connection for 3rd party
transfer */
enum { NORMAL, SOURCE3RD, TARGET3RD } xfertype;
/* 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 */
};
/* The end of connectdata. */
/*
* Struct to keep statistical and informational data.
*/
struct PureInfo {
int httpcode; /* Recent HTTP or FTP response code */
int httpproxycode;
int httpversion;
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;
long httpauthavail;
long numconnects; /* how many new connection did libcurl created */
char *contenttype; /* the content type of the object */
};
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_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 UrlState {
enum {
Curl_if_none,
Curl_if_easy,
Curl_if_multi
} used_interface;
/* buffers to store authentication data in, as parsed from input options */
struct timeval keeps_speed; /* for the progress meter really */
/* 'connects' will be an allocated array with pointers. If the pointer is
set, it holds an allocated connection. */
struct connectdata **connects;
long numconnects; /* size of the 'connects' array */
int 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 *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;
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 */
};
/*
* 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 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 is 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 */
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 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 */
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_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 ftp_append;
bool ftp_ascii;
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 expect100header; /* TRUE if we added Expect: 100-continue */
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 */
};
/*
* In August 2001, this struct was redesigned and is since stricter than
* before. The 'connectdata' struct MUST have all the connection oriented
* stuff as we may now have several simultaneous connections and connection
* structs in memory.
*
* From now on, the 'SessionHandle' 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 curl_hash *hostcache;
void *multi; /* if non-NULL, points to the multi handle
struct of which this "belongs" */
struct Curl_share *share; /* Share, handles global variable mutexing */
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 */
};
#define LIBCURL_NAME "libcurl"
#endif
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