1 /* |
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include <windows.h> |
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27 #include "jni.h" |
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28 #include "net_util.h" |
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29 #include "sun_net_PortConfig.h" |
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30 |
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31 #ifdef __cplusplus |
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32 extern "C" { |
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33 #endif |
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34 |
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35 struct portrange { |
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36 int lower; |
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37 int higher; |
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38 }; |
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39 |
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40 static int getPortRange(struct portrange *range) |
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41 { |
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42 OSVERSIONINFO ver; |
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43 ver.dwOSVersionInfoSize = sizeof(ver); |
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44 GetVersionEx(&ver); |
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45 |
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46 /* Check for major version 5 or less = Windows XP/2003 or older */ |
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47 if (ver.dwMajorVersion <= 5) { |
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48 LONG ret; |
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49 HKEY hKey; |
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50 range->lower = 1024; |
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51 range->higher = 4999; |
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52 |
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53 /* check registry to see if upper limit was raised */ |
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54 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, |
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55 "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters", |
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56 0, KEY_READ, (PHKEY)&hKey |
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57 ); |
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58 if (ret == ERROR_SUCCESS) { |
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59 DWORD maxuserport; |
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60 ULONG ulType; |
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61 DWORD dwLen = sizeof(maxuserport); |
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62 ret = RegQueryValueEx(hKey, "MaxUserPort", NULL, &ulType, |
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63 (LPBYTE)&maxuserport, &dwLen); |
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64 RegCloseKey(hKey); |
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65 if (ret == ERROR_SUCCESS) { |
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66 range->higher = maxuserport; |
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67 } |
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68 } |
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69 } else { |
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70 /* There doesn't seem to be an API to access this. "MaxUserPort" |
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71 * is affected, but is not sufficient to determine. |
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72 * so we just use the defaults, which are less likely to change |
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73 */ |
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74 range->lower = 49152; |
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75 range->higher = 65535; |
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76 } |
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77 return 0; |
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78 } |
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79 |
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80 /* |
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81 * Class: sun_net_PortConfig |
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82 * Method: getLower0 |
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83 * Signature: ()I |
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84 */ |
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85 JNIEXPORT jint JNICALL Java_sun_net_PortConfig_getLower0 |
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86 (JNIEnv *env, jclass clazz) |
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87 { |
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88 struct portrange range; |
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89 getPortRange(&range); |
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90 return range.lower; |
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91 } |
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92 |
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93 /* |
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94 * Class: sun_net_PortConfig |
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95 * Method: getUpper0 |
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96 * Signature: ()I |
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97 */ |
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98 JNIEXPORT jint JNICALL Java_sun_net_PortConfig_getUpper0 |
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99 (JNIEnv *env, jclass clazz) |
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100 { |
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101 struct portrange range; |
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102 getPortRange(&range); |
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103 return range.higher; |
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104 } |
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105 #ifdef __cplusplus |
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106 } |
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107 #endif |
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