/* wincap.cc -- figure out on which OS we're running. Set the
		capability class to the appropriate values.

This file is part of Cygwin.

This software is a copyrighted work licensed under the terms of the
Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
details. */

#include "winsup.h"
#include "miscfuncs.h"
#include "security.h"
#include "ntdll.h"
#include "memory_layout.h"

static const wincaps wincap_8_1 = {
  {
    has_new_pebteb_region:false,
    has_unprivileged_createsymlink:false,
    has_precise_interrupt_time:false,
    has_posix_unlink_semantics:false,
    has_posix_unlink_semantics_with_ignore_readonly:false,
    has_case_sensitive_dirs:false,
    has_posix_rename_semantics:false,
    has_con_24bit_colors:false,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:false,
    has_tcp_fastopen:false,
    has_linux_tcp_keepalive_sockopts:false,
    has_tcp_maxrtms:false,
    has_con_broken_tabs:false,
    has_user_shstk:false,
  },
};

static const wincaps  wincap_10_1507 = {
  {
    has_new_pebteb_region:false,
    has_unprivileged_createsymlink:false,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:false,
    has_posix_unlink_semantics_with_ignore_readonly:false,
    has_case_sensitive_dirs:false,
    has_posix_rename_semantics:false,
    has_con_24bit_colors:false,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:false,
    has_tcp_fastopen:false,
    has_linux_tcp_keepalive_sockopts:false,
    has_tcp_maxrtms:false,
    has_con_broken_tabs:false,
    has_user_shstk:false,
  },
};

static const wincaps  wincap_10_1607 = {
  {
    has_new_pebteb_region:false,
    has_unprivileged_createsymlink:false,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:false,
    has_posix_unlink_semantics_with_ignore_readonly:false,
    has_case_sensitive_dirs:false,
    has_posix_rename_semantics:false,
    has_con_24bit_colors:false,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:false,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:false,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:false,
    has_user_shstk:false,
  },
};

static const wincaps wincap_10_1703 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:false,
    has_posix_unlink_semantics_with_ignore_readonly:false,
    has_case_sensitive_dirs:false,
    has_posix_rename_semantics:false,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:false,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:false,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:true,
    has_user_shstk:false,
  },
};

static const wincaps wincap_10_1709 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:true,
    has_posix_unlink_semantics_with_ignore_readonly:false,
    has_case_sensitive_dirs:false,
    has_posix_rename_semantics:false,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:false,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:true,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:true,
    has_user_shstk:false,
  },
};

static const wincaps wincap_10_1803 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:true,
    has_posix_unlink_semantics_with_ignore_readonly:false,
    has_case_sensitive_dirs:true,
    has_posix_rename_semantics:false,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:true,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:true,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:true,
    has_user_shstk:false,
  },
};

static const wincaps wincap_10_1809 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:true,
    has_posix_unlink_semantics_with_ignore_readonly:true,
    has_case_sensitive_dirs:true,
    has_posix_rename_semantics:true,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:true,
    has_con_broken_il_dl:false,
    has_con_esc_rep:false,
    has_extended_mem_api:true,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:true,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:true,
    has_user_shstk:false,
  },
};

static const wincaps wincap_10_1903 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:true,
    has_posix_unlink_semantics_with_ignore_readonly:true,
    has_case_sensitive_dirs:true,
    has_posix_rename_semantics:true,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:true,
    has_con_esc_rep:true,
    has_extended_mem_api:true,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:true,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:true,
    has_user_shstk:false,
  },
};

static const wincaps wincap_10_2004 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:true,
    has_posix_unlink_semantics_with_ignore_readonly:true,
    has_case_sensitive_dirs:true,
    has_posix_rename_semantics:true,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:true,
    has_extended_mem_api:true,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:true,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:true,
    has_user_shstk:true,
  },
};

static const wincaps wincap_11 = {
  {
    has_new_pebteb_region:true,
    has_unprivileged_createsymlink:true,
    has_precise_interrupt_time:true,
    has_posix_unlink_semantics:true,
    has_posix_unlink_semantics_with_ignore_readonly:true,
    has_case_sensitive_dirs:true,
    has_posix_rename_semantics:true,
    has_con_24bit_colors:true,
    has_con_broken_csi3j:false,
    has_con_broken_il_dl:false,
    has_con_esc_rep:true,
    has_extended_mem_api:true,
    has_tcp_fastopen:true,
    has_linux_tcp_keepalive_sockopts:true,
    has_tcp_maxrtms:true,
    has_con_broken_tabs:false,
    has_user_shstk:true,
  },
};

wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));

void
wincapc::init ()
{
  if (caps)
    return;		// already initialized

  GetSystemInfo (&system_info);
  version.dwOSVersionInfoSize = sizeof (RTL_OSVERSIONINFOEXW);
  RtlGetVersion (&version);
  /* Overwrite unreliable kernel version with correct values returned by
     RtlGetNtVersionNumbers.  See git log of this change for a description. */
  RtlGetNtVersionNumbers (&version.dwMajorVersion,
			  &version.dwMinorVersion,
			  &version.dwBuildNumber);
  version.dwBuildNumber &= 0xffff;

  switch (version.dwMajorVersion)
    {
      case 6:
	caps = &wincap_8_1;
	break;
      case 10:
      default:
	if (likely (version.dwBuildNumber >= 22000))
	  caps = &wincap_11;
	else if (version.dwBuildNumber >= 19041)
	  caps = &wincap_10_2004;
	else if (version.dwBuildNumber >= 18362)
	  caps = &wincap_10_1903;
	else if (version.dwBuildNumber >= 17763)
	  caps = &wincap_10_1809;
	else if (version.dwBuildNumber >= 17134)
	  caps = &wincap_10_1803;
	else if (version.dwBuildNumber >= 16299)
	  caps = &wincap_10_1709;
	else if (version.dwBuildNumber >= 15063)
	  caps = &wincap_10_1703;
	else if (version.dwBuildNumber >= 14393)
	  caps = &wincap_10_1607;
	else
	  caps = & wincap_10_1507;
    }

  _is_server = (version.wProductType != VER_NT_WORKSTATION);

  __small_sprintf (osnam, "NT-%d.%d", version.dwMajorVersion,
		   version.dwMinorVersion);
}