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curl_version_info(3)		libcurl	Manual		  curl_version_info(3)

NAME
       curl_version_info - returns run-time libcurl version info

SYNOPSIS
       #include	<curl/curl.h>

       curl_version_info_data *curl_version_info( CURLversion age);

DESCRIPTION
       Returns	a  pointer to a	filled in static struct	with information about
       various features	in the running version of libcurl. age should  be  set
       to  the	version	 of this functionality by the time you write your pro-
       gram. This way, libcurl will always return a proper  struct  that  your
       program understands, while programs in the future might get a different
       struct. CURLVERSION_NOW will be the most	recent one for the library you
       have installed:

	       data = curl_version_info(CURLVERSION_NOW);

       Applications  should use	this information to judge if things are	possi-
       ble to do or not, instead of using compile-time checks, as  dynamic/DLL
       libraries can be	changed	independent of applications.

       The curl_version_info_data struct looks like this

       typedef struct {
	 CURLversion age;	   /* see description below */

	 const char *version;	   /* human readable string */
	 unsigned int version_num; /* numeric representation */
	 const char *host;	   /* human readable string */
	 int features;		   /* bitmask, see below */
	 char *ssl_version;	   /* human readable string */
	 long ssl_version_num;	   /* not used,	always zero */
	 const char *libz_version; /* human readable string */
	 const char * const *protocols;	/* protocols */

	 /* when 'age' is CURLVERSION_SECOND or	higher,	the members below exist	*/
	 const char *ares;	   /* human readable string */
	 int ares_num;		   /* number */

	 /* when 'age' is CURLVERSION_THIRD or higher, the members below exist */
	 const char *libidn;	   /* human readable string */

	 /* when 'age' is CURLVERSION_FOURTH or	higher (>= 7.16.1), the	members
	    below exist	*/
	 int iconv_ver_num;	  /* '_libiconv_version' if iconv support enabled */

	 const char *libssh_version; /*	human readable string */

	 /* when 'age' is CURLVERSION_FIFTH or higher (>= 7.57.0), the members
	    below exist	*/
	 unsigned int brotli_ver_num; /* Numeric Brotli	version
					 (MAJOR	<< 24) | (MINOR	<< 12) | PATCH */
	 const char *brotli_version; /*	human readable string. */

	 /* when 'age' is CURLVERSION_SIXTH or higher (>= 7.66.0), the members
	    below exist	*/
	 unsigned int nghttp2_ver_num; /* Numeric nghttp2 version
					  (MAJOR << 16)	| (MINOR << 8) | PATCH */
	 const char *nghttp2_version; /* human readable	string.	*/

	 const char *quic_version;    /* human readable	quic (+	HTTP/3)	library	+
					 version or NULL */

	 /* when 'age' is CURLVERSION_SEVENTH or higher	(>= 7.70.0), the members
	    below exist	*/
	 const char *cainfo;	      /* the built-in default CURLOPT_CAINFO, might
					 be NULL */
	 const char *capath;	      /* the built-in default CURLOPT_CAPATH, might
					 be NULL */
	 /* when 'age' is CURLVERSION_EIGHTH or	higher (>= 7.71.0), the	members
	    below exist	*/
	 unsigned int zstd_ver_num; /* Numeric Zstd version
					 (MAJOR	<< 24) | (MINOR	<< 12) | PATCH */
	 const char *zstd_version; /* human readable string. */
       } curl_version_info_data;

       age describes what the age of this struct is. The number	depends	on how
       new the libcurl you're using is.	You are	however	guaranteed  to	get  a
       struct  that  you have a	matching struct	for in the header, as you tell
       libcurl your "age" with the input argument.

       version is just an ascii	string for the libcurl version.

       version_num is a	24 bit number created like this: <8 bits major number>
       |  <8  bits  minor  number>  |  <8 bits patch number>. Version 7.9.8 is
       therefore returned as 0x070908.

       host is an ascii	string showing what host information that this libcurl
       was  built for. As discovered by	a configure script or set by the build
       environment.

       features	can have none, one or more bits	set, and the currently defined
       bits are:

	      CURL_VERSION_ALTSVC
		     HTTP Alt-Svc parsing and the associated options (Added in
		     7.64.1)

	      CURL_VERSION_ASYNCHDNS
		     libcurl was built	with  support  for  asynchronous  name
		     lookups,  which  allows more exact	timeouts (even on Win-
		     dows) and less blocking when using	the  multi  interface.
		     (added in 7.10.7)

	      CURL_VERSION_BROTLI
		     supports  HTTP Brotli content encoding using libbrotlidec
		     (Added in 7.57.0)

	      CURL_VERSION_ZSTD
		     supports HTTP zstd	content	encoding  using	 zstd  library
		     (Added in 7.72.0)

	      CURL_VERSION_CONV
		     libcurl was built with support for	character conversions,
		     as	provided by the	CURLOPT_CONV_*	callbacks.  (Added  in
		     7.15.4)

	      CURL_VERSION_CURLDEBUG
		     libcurl  was  built  with memory tracking debug capabili-
		     ties. This	is mainly of  interest	for  libcurl  hackers.
		     (added in 7.19.6)

	      CURL_VERSION_DEBUG
		     libcurl  was  built  with	debug  capabilities  (added in
		     7.10.6)

	      CURL_VERSION_GSSAPI
		     libcurl was built with support for	 GSS-API.  This	 makes
		     libcurl  use  provided  functions for Kerberos and	SPNEGO
		     authentication. It	also allows libcurl to use the current
		     user  credentials without the app having to pass them on.
		     (Added in 7.38.0)

	      CURL_VERSION_GSSNEGOTIATE
		     supports HTTP GSS-Negotiate (added	in 7.10.6)

	      CURL_VERSION_HTTPS_PROXY
		     libcurl was built with support for	 HTTPS-proxy.	(Added
		     in	7.52.0)

	      CURL_VERSION_HTTP2
		     libcurl  was  built  with	support	 for HTTP2.  (Added in
		     7.33.0)

	      CURL_VERSION_HTTP3
		     HTTP/3 and	QUIC support are built-in (Added in 7.66.0)

	      CURL_VERSION_IDN
		     libcurl was built with support  for  IDNA,	 domain	 names
		     with international	letters. (Added	in 7.12.0)

	      CURL_VERSION_IPV6
		     supports IPv6

	      CURL_VERSION_KERBEROS4
		     supports Kerberos V4 (when	using FTP). Legacy bit.	Depre-
		     cated since 7.33.0.

	      CURL_VERSION_KERBEROS5
		     supports Kerberos V5 authentication for FTP, IMAP,	 POP3,
		     SMTP and SOCKSv5 proxy (Added in 7.40.0)

	      CURL_VERSION_LARGEFILE
		     libcurl was built with support for	large files. (Added in
		     7.11.1)

	      CURL_VERSION_UNICODE
		     libcurl was built with Unicode support on	Windows.  This
		     makes  non-ASCII characters work in filenames and options
		     passed to libcurl.	(Added in 7.72.0)

	      CURL_VERSION_LIBZ
		     supports HTTP deflate using libz (Added in	7.10)

	      CURL_VERSION_MULTI_SSL
		     libcurl was built with multiple  SSL  backends.  For  de-
		     tails, see	curl_global_sslset(3).	(Added in 7.56.0)

	      CURL_VERSION_NTLM
		     supports HTTP NTLM	(added in 7.10.6)

	      CURL_VERSION_NTLM_WB
		     libcurl  was  built with support for NTLM delegation to a
		     winbind helper.  (Added in	7.22.0)

	      CURL_VERSION_PSL
		     libcurl was built with support for	Mozilla's Public  Suf-
		     fix List. This makes libcurl ignore cookies with a	domain
		     that's on the list.  (Added in 7.47.0)

	      CURL_VERSION_SPNEGO
		     libcurl was built with support for	SPNEGO	authentication
		     (Simple  and Protected GSS-API Negotiation	Mechanism, de-
		     fined in RFC 2478.) (added	in 7.10.8)

	      CURL_VERSION_SSL
		     supports SSL (HTTPS/FTPS) (Added in 7.10)

	      CURL_VERSION_SSPI
		     libcurl was built with support for	 SSPI.	This  is  only
		     available	on  Windows and	makes libcurl use Windows-pro-
		     vided functions for Kerberos, NTLM, SPNEGO	and Digest au-
		     thentication.  It	also allows libcurl to use the current
		     user credentials without the app having to	pass them  on.
		     (Added in 7.13.2)

	      CURL_VERSION_TLSAUTH_SRP
		     libcurl  was  built  with	support	for TLS-SRP. (Added in
		     7.21.4)

	      CURL_VERSION_UNIX_SOCKETS
		     libcurl was built with support for	Unix  domain  sockets.
		     (Added in 7.40.0)
       ssl_version is an ASCII string for the TLS library name + version used.
       If libcurl has no SSL support, this is NULL.  For  example  "Schannel",
       "SecureTransport" or "OpenSSL/1.1.0g".

       ssl_version_num is always 0.

       libz_version  is	 an  ASCII  string (there is no	numerical version). If
       libcurl has no libz support, this is NULL.

       protocols is a pointer to an array of char * pointers,  containing  the
       names  protocols	 that  libcurl supports	(using lowercase letters). The
       protocol	names are the same as would be used in URLs. The array is ter-
       minated by a NULL entry.

RETURN VALUE
       A pointer to a curl_version_info_data struct.

SEE ALSO
       curl_version(3)

libcurl	7.72.0			 July 14, 2020		  curl_version_info(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO

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