text: /***************************************************************************
   *                                  _   _ ____  _
   *  Project                     ___| | | |  _ \| |
   *                             / __| | | | |_) | |
   *                            | (__| |_| |  _ <| |___
   *                             \___|\___/|_| \_\_____|
   *
   * Copyright (C) 1998 - 2016, 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 https://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.
   *
   ***************************************************************************/
  
  #include "curl_setup.h"
  
  #include <curl.h>
  #include "urldata.h"
  #include "vtls/vtls.h"
  #include "http2.h"
  #include "curl_printf.h"
  
  #ifdef USE_ARES
  #  if defined(CURL_STATICLIB) && !defined(CARES_STATICLIB) && \
       (defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__))
  #    define CARES_STATICLIB
  #  endif
  #  include <ares.h>
  #endif
  
  #ifdef USE_LIBIDN2
  #include <idn2.h>
  #endif
  
  #ifdef USE_LIBPSL
  #include <libpsl.h>
  #endif
  
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
  #include <iconv.h>
  #endif
  
  #ifdef USE_LIBRTMP
  #include <librtmp/rtmp.h>
  #endif
  
  #ifdef USE_LIBSSH2
  #include <libssh2.h>
  #endif
  
  #ifdef HAVE_LIBSSH2_VERSION
  /* get it run-time if possible */
  #define CURL_LIBSSH2_VERSION libssh2_version(0)
  #else
  /* use build-time if run-time not possible */
  #define CURL_LIBSSH2_VERSION LIBSSH2_VERSION
  #endif
  
  void Curl_version_init(void);
  
  /* For thread safety purposes this function is called by global_init so that
     the static data in both version functions is initialized. */
  void Curl_version_init(void)
  {
    curl_version();
    curl_version_info(CURLVERSION_NOW);
  }
  
  char *curl_version(void)
  {
    static bool initialized;
    static char version[200];
    char *ptr = version;
    size_t len;
    size_t left = sizeof(version);
  
    if(initialized)
      return version;
  
    strcpy(ptr, LIBCURL_NAME "/" LIBCURL_VERSION);
    len = strlen(ptr);
    left -= len;
    ptr += len;
  
    if(left > 1) {
      len = Curl_ssl_version(ptr + 1, left - 1);
  
      if(len > 0) {
        *ptr = ' ';
        left -= ++len;
        ptr += len;
      }
    }
  
  #ifdef HAVE_LIBZ
    len = snprintf(ptr, left, " zlib/%s", zlibVersion());
    left -= len;
    ptr += len;
  #endif
  #ifdef USE_ARES
    /* this function is only present in c-ares, not in the original ares */
    len = snprintf(ptr, left, " c-ares/%s", ares_version(NULL));
    left -= len;
    ptr += len;
  #endif
  #ifdef USE_LIBIDN2
    if(idn2_check_version(IDN2_VERSION)) {
      len = snprintf(ptr, left, " libidn2/%s", idn2_check_version(NULL));
      left -= len;
      ptr += len;
    }
  #endif
  #ifdef USE_LIBPSL
    len = snprintf(ptr, left, " libpsl/%s", psl_get_version());
    left -= len;
    ptr += len;
  #endif
  #ifdef USE_WIN32_IDN
    len = snprintf(ptr, left, " WinIDN");
    left -= len;
    ptr += len;
  #endif
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
  #ifdef _LIBICONV_VERSION
    len = snprintf(ptr, left, " iconv/%d.%d",
                   _LIBICONV_VERSION >> 8, _LIBICONV_VERSION & 255);
  #else
    /* version unknown */
    len = snprintf(ptr, left, " iconv");
  #endif /* _LIBICONV_VERSION */
    left -= len;
    ptr += len;
  #endif
  #ifdef USE_LIBSSH2
    len = snprintf(ptr, left, " libssh2/%s", CURL_LIBSSH2_VERSION);
    left -= len;
    ptr += len;
  #endif
  #ifdef USE_NGHTTP2
    len = Curl_http2_ver(ptr, left);
    left -= len;
    ptr += len;
  #endif
  #ifdef USE_LIBRTMP
    {
      char suff[2];
      if(RTMP_LIB_VERSION & 0xff) {
        suff[0] = (RTMP_LIB_VERSION & 0xff) + 'a' - 1;
        suff[1] = '\0';
      }
      else
        suff[0] = '\0';
  
      snprintf(ptr, left, " librtmp/%d.%d%s",
               RTMP_LIB_VERSION >> 16, (RTMP_LIB_VERSION >> 8) & 0xff,
               suff);
  /*
    If another lib version is added below this one, this code would
    also have to do:
  
      len = what snprintf() returned
  
      left -= len;
      ptr += len;
  */
    }
  #endif
  
    initialized = true;
    return version;
  }
  
  /* data for curl_version_info
  
     Keep the list sorted alphabetically. It is also written so that each
     protocol line has its own #if line to make things easier on the eye.
   */
  
  static const char * const protocols[] = {
  #ifndef CURL_DISABLE_DICT
    "dict",
  #endif
  #ifndef CURL_DISABLE_FILE
    "file",
  #endif
  #ifndef CURL_DISABLE_FTP
    "ftp",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_FTP)
    "ftps",
  #endif
  #ifndef CURL_DISABLE_GOPHER
    "gopher",
  #endif
  #ifndef CURL_DISABLE_HTTP
    "http",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_HTTP)
    "https",
  #endif
  #ifndef CURL_DISABLE_IMAP
    "imap",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_IMAP)
    "imaps",
  #endif
  #ifndef CURL_DISABLE_LDAP
    "ldap",
  #if !defined(CURL_DISABLE_LDAPS) && \
      ((defined(USE_OPENLDAP) && defined(USE_SSL)) || \
       (!defined(USE_OPENLDAP) && defined(HAVE_LDAP_SSL)))
    "ldaps",
  #endif
  #endif
  #ifndef CURL_DISABLE_POP3
    "pop3",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_POP3)
    "pop3s",
  #endif
  #ifdef USE_LIBRTMP
    "rtmp",
  #endif
  #ifndef CURL_DISABLE_RTSP
    "rtsp",
  #endif
  #ifdef USE_LIBSSH2
    "scp",
  #endif
  #ifdef USE_LIBSSH2
    "sftp",
  #endif
  #if !defined(CURL_DISABLE_SMB) && defined(USE_NTLM) && \
     (CURL_SIZEOF_CURL_OFF_T > 4) && \
     (!defined(USE_WINDOWS_SSPI) || defined(USE_WIN32_CRYPTO))
    "smb",
  #  ifdef USE_SSL
    "smbs",
  #  endif
  #endif
  #ifndef CURL_DISABLE_SMTP
    "smtp",
  #endif
  #if defined(USE_SSL) && !defined(CURL_DISABLE_SMTP)
    "smtps",
  #endif
  #ifndef CURL_DISABLE_TELNET
    "telnet",
  #endif
  #ifndef CURL_DISABLE_TFTP
    "tftp",
  #endif
  
    NULL
  };
  
  static curl_version_info_data version_info = {
    CURLVERSION_NOW,
    LIBCURL_VERSION,
    LIBCURL_VERSION_NUM,
    OS, /* as found by configure or set by hand at build-time */
    0 /* features is 0 by default */
  #ifdef ENABLE_IPV6
    | CURL_VERSION_IPV6
  #endif
  #ifdef USE_SSL
    | CURL_VERSION_SSL
  #endif
  #ifdef USE_NTLM
    | CURL_VERSION_NTLM
  #endif
  #if !defined(CURL_DISABLE_HTTP) && defined(USE_NTLM) && \
    defined(NTLM_WB_ENABLED)
    | CURL_VERSION_NTLM_WB
  #endif
  #ifdef USE_SPNEGO
    | CURL_VERSION_SPNEGO
  #endif
  #ifdef USE_KERBEROS5
    | CURL_VERSION_KERBEROS5
  #endif
  #ifdef HAVE_GSSAPI
    | CURL_VERSION_GSSAPI
  #endif
  #ifdef USE_WINDOWS_SSPI
    | CURL_VERSION_SSPI
  #endif
  #ifdef HAVE_LIBZ
    | CURL_VERSION_LIBZ
  #endif
  #ifdef DEBUGBUILD
    | CURL_VERSION_DEBUG
  #endif
  #ifdef CURLDEBUG
    | CURL_VERSION_CURLDEBUG
  #endif
  #ifdef CURLRES_ASYNCH
    | CURL_VERSION_ASYNCHDNS
  #endif
  #if (CURL_SIZEOF_CURL_OFF_T > 4) && \
      ( (SIZEOF_OFF_T > 4) || defined(USE_WIN32_LARGE_FILES) )
    | CURL_VERSION_LARGEFILE
  #endif
  #if defined(CURL_DOES_CONVERSIONS)
    | CURL_VERSION_CONV
  #endif
  #if defined(USE_TLS_SRP)
    | CURL_VERSION_TLSAUTH_SRP
  #endif
  #if defined(USE_NGHTTP2)
    | CURL_VERSION_HTTP2
  #endif
  #if defined(USE_UNIX_SOCKETS)
    | CURL_VERSION_UNIX_SOCKETS
  #endif
  #if defined(USE_LIBPSL)
    | CURL_VERSION_PSL
  #endif
  #if defined(HTTPS_PROXY_SUPPORT)
    | CURL_VERSION_HTTPS_PROXY
  #endif
    ,
    NULL, /* ssl_version */
    0,    /* ssl_version_num, this is kept at zero */
    NULL, /* zlib_version */
    protocols,
    NULL, /* c-ares version */
    0,    /* c-ares version numerical */
    NULL, /* libidn version */
    0,    /* iconv version */
    NULL, /* ssh lib version */
  };
  
  curl_version_info_data *curl_version_info(CURLversion stamp)
  {
    static bool initialized;
  #ifdef USE_LIBSSH2
    static char ssh_buffer[80];
  #endif
  #ifdef USE_SSL
    static char ssl_buffer[80];
  #endif
  
    if(initialized)
      return &version_info;
  
  #ifdef USE_SSL
    Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
    version_info.ssl_version = ssl_buffer;
  #endif
  
  #ifdef HAVE_LIBZ
    version_info.libz_version = zlibVersion();
    /* libz left NULL if non-existing */
  #endif
  #ifdef USE_ARES
    {
      int aresnum;
      version_info.ares = ares_version(&aresnum);
      version_info.ares_num = aresnum;
    }
  #endif
  #ifdef USE_LIBIDN2
    /* This returns a version string if we use the given version or later,
       otherwise it returns NULL */
    version_info.libidn = idn2_check_version(IDN2_VERSION);
    if(version_info.libidn)
      version_info.features |= CURL_VERSION_IDN;
  #elif defined(USE_WIN32_IDN)
    version_info.features |= CURL_VERSION_IDN;
  #endif
  
  #if defined(HAVE_ICONV) && defined(CURL_DOES_CONVERSIONS)
  #ifdef _LIBICONV_VERSION
    version_info.iconv_ver_num = _LIBICONV_VERSION;
  #else
    /* version unknown */
    version_info.iconv_ver_num = -1;
  #endif /* _LIBICONV_VERSION */
  #endif
  
  #ifdef USE_LIBSSH2
    snprintf(ssh_buffer, sizeof(ssh_buffer), "libssh2/%s", LIBSSH2_VERSION);
    version_info.libssh_version = ssh_buffer;
  #endif
  
    (void)stamp; /* avoid compiler warnings, we don't use this */
  
    initialized = true;
    return &version_info;
  }
  