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|
#ifndef __URLDATA_H
#define __URLDATA_H
/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* In order to be useful for every potential user, curl and libcurl are
* dual-licensed under the MPL and the MIT/X-derivate licenses.
*
* 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 MPL or the MIT/X-derivate
* licenses. You may pick one of these licenses.
*
* 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"
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
#define PORT_FTP 21
#define PORT_TELNET 23
#define PORT_GOPHER 70
#define PORT_HTTP 80
#define PORT_HTTPS 443
#define PORT_DICT 2628
#define PORT_LDAP 389
#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
/* SSLeay stuff usually in /usr/local/ssl/include */
#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"
#else
#include "rsa.h"
#include "crypto.h"
#include "x509.h"
#include "pem.h"
#include "ssl.h"
#include "err.h"
#endif
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include "timeval.h"
#include <curl/curl.h>
/* Download buffer size, keep it fairly big for speed reasons */
#define BUFSIZE (1024*50)
/* Defaul upload buffer size, keep it smallish to get faster progress meter
updates. This is just default, it is dynamic and adjusts to the upload
speed. */
#define UPLOAD_BUFSIZE (1024*2)
/* 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 */
#ifndef MAX
#define MAX(x,y) ((x)>(y)?(x):(y))
#endif
/* Type of handle. All publicly returned 'handles' in the curl interface
have a handle first in the struct that describes what kind of handle it
is. Used to detect bad handle usage. */
typedef enum {
STRUCT_NONE,
STRUCT_OPEN,
STRUCT_CONNECT,
STRUCT_LAST
} Handle;
/* Connecting to a remote server using the curl interface is moving through
a state machine, this type is used to store the current state */
typedef enum {
CONN_NONE, /* illegal state */
CONN_INIT, /* curl_connect() has been called */
CONN_DO, /* curl_do() has been called successfully */
CONN_DONE, /* curl_done() has been called successfully */
CONN_ERROR, /* and error has occurred */
CONN_LAST /* illegal state */
} ConnState;
#ifdef 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 SSL and SSL connections */
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 */
};
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 */
char *CApath; /* DOES NOT WORK ON WINDOWS */
char *CAfile; /* cerficate to verify peer against */
};
/****************************************************************************
* HTTP unique setup
***************************************************************************/
struct HTTP {
struct FormData *sendit;
int postsize;
char *p_pragma; /* Pragma: string */
char *p_accept; /* Accept: string */
long readbytecount;
long writebytecount;
/* For FORM posting */
struct Form form;
size_t (*storefread)(char *, size_t , size_t , FILE *);
FILE *in;
};
/****************************************************************************
* FTP unique setup
***************************************************************************/
struct FTP {
long *bytecountp;
char *user; /* user name string */
char *passwd; /* password string */
char *urlpath; /* the originally given path part of the URL */
char *dir; /* decoded directory */
char *file; /* decoded file */
};
/*
* Boolean values that concerns this connection.
*/
struct ConnectBits {
bool close; /* if set, we close the connection after this request */
};
/*
* 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 */
/* To better see what kind of struct that is passed as input, *ALL* publicly
returned handles MUST have this initial 'Handle'. */
Handle handle; /* struct identifier */
struct UrlData *data; /* link to the root CURL struct */
int connectindex; /* what index in the connects index this particular
struct has */
/**** curl_connect() phase fields */
ConnState state; /* for state dependent actions */
long protocol; /* PROT_* flags concerning the protocol set */
#define PROT_MISSING (1<<0)
#define PROT_GOPHER (1<<1)
#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)
#ifdef ENABLE_IPV6
struct addrinfo *hp; /* host info pointer list */
struct addrinfo *ai; /* the particular host we use */
#else
char *hostent_buf; /* pointer to allocated memory for name info */
struct hostent *hp;
struct sockaddr_in serv_addr;
#endif
char protostr[64]; /* store the protocol string in this buffer */
char gname[257]; /* store the hostname in this buffer */
char *name; /* host name pointer to fool around with */
char *path; /* allocated buffer to store the URL's path part in */
char *hostname; /* hostname to connect, as parsed from url */
long port; /* which port to use locally */
unsigned short remote_port; /* what remote port to connect to,
not the proxy port! */
char *ppath;
long bytecount;
struct timeval now; /* current time */
int firstsocket; /* the main socket to use */
int secondarysocket; /* for i.e ftp transfers */
long upload_bufsize; /* adjust as you see fit, never bigger than BUFSIZE
never smaller than UPLOAD_BUFSIZE */
struct ssl_connect_data ssl; /* this is for ssl-stuff */
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 *connect);
CURLcode (*curl_done)(struct connectdata *connect);
/* 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.
*/
CURLcode (*curl_connect)(struct connectdata *connect);
/* 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 *connect);
/**** curl_get() phase fields */
/* READ stuff */
int sockfd; /* socket to read from or -1 */
int size; /* -1 if unknown at this point */
bool getheader; /* TRUE if header parsing is wanted */
long *bytecountp; /* return number of bytes read or NULL */
/* WRITE stuff */
int writesockfd; /* socket to write to, it may very well be
the same we read from. -1 disables */
long *writebytecountp; /* return number of bytes written or NULL */
#ifdef 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;
int sec_complete;
void *app_data;
#endif
/*************** Request - specific items ************/
/* previously this was in the urldata struct */
union {
struct HTTP *http;
struct HTTP *gopher; /* alias, just for the sake of being more readable */
struct HTTP *https; /* alias, just for the sake of being more readable */
struct FTP *ftp;
#if 0 /* no need for special ones for these: */
struct TELNET *telnet;
struct FILE *file;
struct LDAP *ldap;
struct DICT *dict;
#endif
void *generic;
} proto;
};
struct Progress {
long lastshow; /* time() of the last displayed progress meter or NULL to
force redraw at next call */
double size_dl;
double size_ul;
double downloaded;
double uploaded;
double 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;
double dlspeed;
double ulspeed;
struct timeval start;
struct timeval t_startsingle;
/* various data stored for possible later report */
double t_nslookup;
double t_connect;
double t_pretransfer;
int httpcode;
time_t filetime; /* If requested, this is might get set. It may be 0 if
the time was unretrievable */
#define CURR_TIME 5
double speeder[ 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_CUSTOM,
HTTPREQ_LAST /* last in list */
} Curl_HttpReq;
/* This struct is for boolean settings that define how to behave during
this session. */
struct Configbits {
/* these four request types mirror the httpreq field */
bool http_formpost;
bool http_post;
bool http_put;
bool http_get;
bool get_filetime;
bool tunnel_thru_httpproxy;
bool ftp_append;
bool ftp_ascii;
bool ftp_list_only;
bool ftp_use_port;
bool hide_progress;
bool http_fail_on_error;
bool http_follow_location;
bool http_include_header;
bool http_set_referer;
bool http_auto_referer; /* set "correct" referer when following location: */
bool httpproxy;
bool mute;
bool no_body;
bool proxy_user_passwd;
bool set_port;
bool set_range;
bool upload;
bool use_netrc;
bool user_passwd;
bool verbose;
bool this_is_a_follow; /* this is a followed Location: request */
bool krb4; /* kerberos4 connection requested */
bool proxystringalloc; /* the http proxy string is malloc()'ed */
bool rangestringalloc; /* the range string is malloc()'ed */
bool urlstringalloc; /* the URL string is malloc()'ed */
};
/* What type of interface that intiated this struct */
typedef enum {
CURLI_NONE,
CURLI_EASY,
CURLI_NORMAL,
CURLI_LAST
} CurlInterface;
/*
* As of April 11, 2000 we're now trying to split up the urldata struct in
* three different parts:
*
* (Global)
* 1 - No matter how many hosts and requests that are being performed, this
* goes for all of them.
*
* (Session)
* 2 - Host and protocol-specific. No matter if we do several transfers to and
* from this host, these variables stay the same.
*
* (Request)
* 3 - Request-specific. Variables that are of interest for this particular
* transfer being made right now.
*
* In Febrary 2001, this is being done stricter. The 'connectdata' struct
* MUST have all the connection oriented stuff as we may now have several
* simultaneous connections and connection structs in memory.
*/
struct UrlData {
Handle handle; /* struct identifier */
CurlInterface interf; /* created by WHAT interface? */
/*************** Global - specific items ************/
FILE *err; /* the stderr writes goes here */
char *errorbuffer; /* store failure messages in here */
/*************** Session - specific items ************/
char *proxy; /* if proxy, set it 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. */
long header_size; /* size of read header(s) in bytes */
long request_size; /* the amount of bytes sent in the request(s) */
FILE *out; /* the fetched file goes here */
FILE *in; /* the uploaded file is read from here */
FILE *writeheader; /* write the header to this is non-NULL */
char *url; /* what to get */
char *freethis; /* if non-NULL, an allocated string for the URL */
long port; /* which port to use (if non-protocol bind) */
unsigned short remote_port; /* what remote port to connect to, not the proxy
port! */
struct Configbits bits; /* new-style (v7) flag data */
struct ssl_config_data ssl; /* this is for ssl-stuff */
char *userpwd; /* <user:password>, if used */
char *range; /* range, if used. See README for detailed specification on
this syntax. */
/* stuff related to HTTP */
long followlocation;
long maxredirs; /* maximum no. of http(s) redirects to follow */
char *referer;
bool free_referer; /* set TRUE if 'referer' points to a string we
allocated */
char *useragent; /* User-Agent string */
char *postfields; /* if POST, set the fields' values here */
long postfieldsize; /* if POST, this might have a size to use instead of
strlen(), and then the data *may* be binary (contain
zero bytes) */
/* stuff related to FTP */
char *ftpport; /* port to send with the PORT command */
/* general things */
char *device; /* Interface to use */
/* function that stores the output:*/
curl_write_callback fwrite;
/* function that reads the input:*/
curl_read_callback fread;
/* function that wants progress information */
curl_progress_callback fprogress;
void *progress_client; /* pointer to pass to the progress callback */
/* function to call instead of the internal for password */
curl_passwd_callback fpasswd;
void *passwd_client; /* pointer to pass to the passwd callback */
long timeout; /* in seconds, 0 means no timeout */
long infilesize; /* size of file to upload, -1 means unknown */
long maxdownload; /* in bytes, the maximum amount of data to fetch, 0
means unlimited */
char buffer[BUFSIZE+1]; /* buffer with size BUFSIZE */
double current_speed; /* the ProgressShow() funcion sets this */
long low_speed_limit; /* bytes/second */
long low_speed_time; /* number of seconds */
int resume_from; /* continue [ftp] transfer from here */
char *cookie; /* HTTP cookie string to send */
char *newurl; /* This can only be set if a Location: was in the
document headers */
struct curl_slist *headers; /* linked list of extra headers */
struct HttpPost *httppost; /* linked list of POST data */
char *cert; /* PEM-formatted certificate */
char *cert_passwd; /* plain text certificate password */
struct CookieInfo *cookies;
long crlf;
struct curl_slist *quote; /* before the transfer */
struct curl_slist *postquote; /* after the transfer */
/* Telnet negotiation options */
struct curl_slist *telnet_options; /* linked list of telnet options */
TimeCond timecondition; /* kind of comparison */
time_t timevalue; /* what time to compare with */
Curl_HttpReq httpreq; /* what kind of HTTP request (if any) is this */
char *customrequest; /* http/ftp request to use */
char *headerbuff; /* allocated buffer to store headers in */
int headersize; /* size of the allocation */
struct Progress progress; /* for all the progress meter data */
#define MAX_CURL_USER_LENGTH 128
#define MAX_CURL_PASSWORD_LENGTH 128
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)
*/
/* buffers to store authentication data in */
char user[MAX_CURL_USER_LENGTH];
char passwd[MAX_CURL_PASSWORD_LENGTH];
char proxyuser[MAX_CURL_USER_LENGTH];
char proxypasswd[MAX_CURL_PASSWORD_LENGTH];
/**** Dynamicly allocated strings, may need to be freed on return ****/
char *ptr_proxyuserpwd; /* free later if not NULL! */
char *ptr_uagent; /* free later if not NULL! */
char *ptr_userpwd; /* free later if not NULL! */
char *ptr_rangeline; /* free later if not NULL! */
char *ptr_ref; /* free later if not NULL! */
char *ptr_cookie; /* free later if not NULL! */
char *ptr_host; /* free later if not NULL */
char *krb4_level; /* what security level */
#ifdef KRB4
FILE *cmdchannel;
#endif
struct timeval keeps_speed; /* this should be request-specific */
/* 'connects' will be an allocated array with pointers. If the pointer is
set, it holds an allocated connection. */
struct connectdata **connects;
size_t numconnects; /* size of the 'connects' array */
curl_closepolicy closepolicy;
};
#define LIBCURL_NAME "libcurl"
#define LIBCURL_ID LIBCURL_NAME " " LIBCURL_VERSION " " SSL_ID
/*
* Here follows function prototypes from what we used to plan to call
* the "low level" interface. It is no longer prioritized and it is not likely
* to ever be supported to external users.
*/
/*
* NAME curl_init()
*
* DESCRIPTION
*
* Inits libcurl globally. This must be used before any libcurl calls can
* be used. This may install global plug-ins or whatever. (This does not
* do winsock inits in Windows.)
*
* EXAMPLE
*
* curl_init();
*
*/
CURLcode curl_init(void);
/*
* NAME curl_init()
*
* DESCRIPTION
*
* Frees libcurl globally. This must be used after all libcurl calls have
* been used. This may remove global plug-ins or whatever. (This does not
* do winsock cleanups in Windows.)
*
* EXAMPLE
*
* curl_free(curl);
*
*/
void curl_free(void);
/*
* NAME curl_open()
*
* DESCRIPTION
*
* Opens a general curl session. It does not try to connect or do anything
* on the network because of this call. The specified URL is only required
* to enable curl to figure out what protocol to "activate".
*
* A session should be looked upon as a series of requests to a single host. A
* session interacts with one host only, using one single protocol.
*
* The URL is not required. If set to "" or NULL, it can still be set later
* using the curl_setopt() function. If the curl_connect() function is called
* without the URL being known, it will return error.
*
* EXAMPLE
*
* CURLcode result;
* CURL *curl;
* result = curl_open(&curl, "http://curl.haxx.nu/libcurl/");
* if(result != CURL_OK) {
* return result;
* }
* */
CURLcode curl_open(CURL **curl, char *url);
/*
* NAME curl_setopt()
*
* DESCRIPTION
*
* Sets a particular option to the specified value.
*
* EXAMPLE
*
* CURL curl;
* curl_setopt(curl, CURL_HTTP_FOLLOW_LOCATION, TRUE);
*/
CURLcode curl_setopt(CURL *handle, CURLoption option, ...);
/*
* NAME curl_close()
*
* DESCRIPTION
*
* Closes a session previously opened with curl_open()
*
* EXAMPLE
*
* CURL *curl;
* CURLcode result;
*
* result = curl_close(curl);
*/
CURLcode curl_close(CURL *curl); /* the opposite of curl_open() */
CURLcode curl_read(CURLconnect *c_conn, char *buf, size_t buffersize,
ssize_t *n);
CURLcode curl_write(CURLconnect *c_conn, char *buf, size_t amount,
size_t *n);
/*
* NAME curl_connect()
*
* DESCRIPTION
*
* Connects to the peer server and performs the initial setup. This function
* writes a connect handle to its second argument that is a unique handle for
* this connect. This allows multiple connects from the same handle returned
* by curl_open().
*
* EXAMPLE
*
* CURLCode result;
* CURL curl;
* CURLconnect connect;
* result = curl_connect(curl, &connect);
*/
CURLcode curl_connect(CURL *curl, CURLconnect **in_connect);
/*
* NAME curl_do()
*
* DESCRIPTION
*
* (Note: May 3rd 2000: this function does not currently allow you to
* specify a document, it will use the one set previously)
*
* This function asks for the particular document, file or resource that
* resides on the server we have connected to. You may specify a full URL,
* just an absolute path or even a relative path. That means, if you're just
* getting one file from the remote site, you can use the same URL as input
* for both curl_open() as well as for this function.
*
* In the even there is a host name, port number, user name or password parts
* in the URL, you can use the 'flags' argument to ignore them completely, or
* at your choice, make the function fail if you're trying to get a URL from
* different host than you connected to with curl_connect().
*
* You can only get one document at a time using the same connection. When one
* document has been received you can although request again.
*
* When the transfer is done, curl_done() MUST be called.
*
* EXAMPLE
*
* CURLCode result;
* char *url;
* CURLconnect *connect;
* result = curl_do(connect, url, CURL_DO_NONE); */
CURLcode curl_do(CURLconnect *in_conn);
/*
* NAME curl_done()
*
* DESCRIPTION
*
* When the transfer following a curl_do() call is done, this function should
* get called.
*
* EXAMPLE
*
* CURLCode result;
* char *url;
* CURLconnect *connect;
* result = curl_done(connect); */
CURLcode curl_done(CURLconnect *connect);
/*
* NAME curl_disconnect()
*
* DESCRIPTION
*
* Disconnects from the peer server and performs connection cleanup.
*
* EXAMPLE
*
* CURLcode result;
* CURLconnect *connect;
* result = curl_disconnect(connect); */
CURLcode curl_disconnect(CURLconnect *connect);
#endif
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