<pclass="level0">Returns a pointer to a filled in struct with information about various run-time features in libcurl. <spanClass="emphasis">type</span> should be set to the version of this functionality by the time you write your program. 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:
<pclass="level0"> data = curl_version_info(CURLVERSION_NOW);
<pclass="level0">Applications should use this information to judge if things are possible to do or not, instead of using compile-time checks, as dynamic/DLL libraries can be changed independent of applications.
<pclass="level0">The curl_version_info_data struct looks like this
<pclass="level0"> /* when 'age' is 0 or higher, the members below also exist: */ 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 **protocols; /* list of protocols */
<pclass="level0"> /* when 'age' is 1 or higher, the members below also exist: */ const char *ares; /* human readable string */ int ares_num; /* number */
<pclass="level0"> /* when 'age' is 2 or higher, the member below also exists: */ const char *libidn; /* human readable string */
<pclass="level0"> /* when 'age' is 3 or higher, the members below also exist: */ int iconv_ver_num; /* '_libiconv_version' if iconv support enabled */
<pclass="level0"> const char *libssh_version; /* human readable string */
<pclass="level0">} curl_version_info_data;
<pclass="level0">
<pclass="level0"><spanClass="emphasis">age</span> 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.
<pclass="level0"><spanClass="emphasis">version</span> is just an ascii string for the libcurl version.
<pclass="level0"><spanClass="emphasis">version_num</span> 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.
<pclass="level0"><spanClass="emphasis">host</span> 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.
<pclass="level0"><spanClass="emphasis">features</span> can have none, one or more bits set, and the currently defined bits are:
<pclass="level1">libcurl was built with support for asynchronous name lookups, which allows more exact timeouts (even on Windows) and less blocking when using the multi interface. (added in 7.10.7)
<pclass="level1">libcurl was built with support for SPNEGO authentication (Simple and Protected GSS-API Negotiation Mechanism, defined in <ahref="http://www.ietf.org/rfc/rfc2478.txt">RFC 2478</a>.) (added in 7.10.8)
<pclass="level1">libcurl was built with support for SSPI. This is only available on Windows and makes libcurl use Windows-provided functions for NTLM authentication. It also allows libcurl to use the current user and the current user's password without the app having to pass them on. (Added in 7.13.2)
<pclass="level1">libcurl was built with support for NTLM delegation to a winbind helper. (Added in 7.22.0)
<pclass="level0"><spanClass="emphasis">ssl_version</span> is an ASCII string for the OpenSSL version used. If libcurl has no SSL support, this is NULL.
<pclass="level0"><spanClass="emphasis">ssl_version_num</span> is the numerical OpenSSL version value as defined by the OpenSSL project. If libcurl has no SSL support, this is 0.
<pclass="level0"><spanClass="emphasis">libz_version</span> is an ASCII string (there is no numerical version). If libcurl has no libz support, this is NULL.
<pclass="level0"><spanClass="emphasis">protocols</span> 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 terminated by a NULL entry. <aname="RETURN"></a><h2class="nroffsh">RETURN VALUE</h2>
<pclass="level0">A pointer to a curl_version_info_data struct. <aname="SEE"></a><h2class="nroffsh">SEE ALSO</h2>
