1 /* |
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2 * Copyright (c) 2014, 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 <jni.h> |
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27 #include <string.h> |
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28 |
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29 #include "net_util.h" |
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30 #include "jdk_net_SocketFlow.h" |
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31 |
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32 static jclass sf_status_class; /* Status enum type */ |
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33 |
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34 static jfieldID sf_status; |
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35 static jfieldID sf_priority; |
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36 static jfieldID sf_bandwidth; |
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37 |
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38 static jfieldID sf_fd_fdID; /* FileDescriptor.fd */ |
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39 |
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40 /* References to the literal enum values */ |
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41 |
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42 static jobject sfs_NOSTATUS; |
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43 static jobject sfs_OK; |
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44 static jobject sfs_NOPERMISSION; |
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45 static jobject sfs_NOTCONNECTED; |
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46 static jobject sfs_NOTSUPPORTED; |
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47 static jobject sfs_ALREADYCREATED; |
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48 static jobject sfs_INPROGRESS; |
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49 static jobject sfs_OTHER; |
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50 |
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51 static jobject getEnumField(JNIEnv *env, char *name); |
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52 static void setStatus(JNIEnv *env, jobject obj, int errval); |
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53 |
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54 /* OS specific code is implemented in these three functions */ |
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55 |
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56 static jboolean flowSupported0() ; |
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57 |
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58 /* |
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59 * Class: sun_net_ExtendedOptionsImpl |
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60 * Method: init |
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61 * Signature: ()V |
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62 */ |
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63 JNIEXPORT void JNICALL Java_sun_net_ExtendedOptionsImpl_init |
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64 (JNIEnv *env, jclass UNUSED) |
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65 { |
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66 static int initialized = 0; |
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67 jclass c; |
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68 |
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69 /* Global class references */ |
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70 |
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71 if (initialized) { |
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72 return; |
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73 } |
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74 |
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75 c = (*env)->FindClass(env, "jdk/net/SocketFlow$Status"); |
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76 CHECK_NULL(c); |
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77 sf_status_class = (*env)->NewGlobalRef(env, c); |
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78 CHECK_NULL(sf_status_class); |
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79 |
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80 /* int "fd" field of java.io.FileDescriptor */ |
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81 |
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82 c = (*env)->FindClass(env, "java/io/FileDescriptor"); |
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83 CHECK_NULL(c); |
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84 sf_fd_fdID = (*env)->GetFieldID(env, c, "fd", "I"); |
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85 CHECK_NULL(sf_fd_fdID); |
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86 |
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87 |
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88 /* SocketFlow fields */ |
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89 |
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90 c = (*env)->FindClass(env, "jdk/net/SocketFlow"); |
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91 CHECK_NULL(c); |
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92 |
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93 /* status */ |
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94 |
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95 sf_status = (*env)->GetFieldID(env, c, "status", |
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96 "Ljdk/net/SocketFlow$Status;"); |
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97 CHECK_NULL(sf_status); |
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98 |
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99 /* priority */ |
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100 |
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101 sf_priority = (*env)->GetFieldID(env, c, "priority", "I"); |
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102 CHECK_NULL(sf_priority); |
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103 |
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104 /* bandwidth */ |
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105 |
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106 sf_bandwidth = (*env)->GetFieldID(env, c, "bandwidth", "J"); |
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107 CHECK_NULL(sf_bandwidth); |
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108 |
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109 /* Initialize the static enum values */ |
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110 |
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111 sfs_NOSTATUS = getEnumField(env, "NO_STATUS"); |
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112 CHECK_NULL(sfs_NOSTATUS); |
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113 sfs_OK = getEnumField(env, "OK"); |
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114 CHECK_NULL(sfs_OK); |
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115 sfs_NOPERMISSION = getEnumField(env, "NO_PERMISSION"); |
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116 CHECK_NULL(sfs_NOPERMISSION); |
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117 sfs_NOTCONNECTED = getEnumField(env, "NOT_CONNECTED"); |
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118 CHECK_NULL(sfs_NOTCONNECTED); |
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119 sfs_NOTSUPPORTED = getEnumField(env, "NOT_SUPPORTED"); |
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120 CHECK_NULL(sfs_NOTSUPPORTED); |
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121 sfs_ALREADYCREATED = getEnumField(env, "ALREADY_CREATED"); |
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122 CHECK_NULL(sfs_ALREADYCREATED); |
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123 sfs_INPROGRESS = getEnumField(env, "IN_PROGRESS"); |
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124 CHECK_NULL(sfs_INPROGRESS); |
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125 sfs_OTHER = getEnumField(env, "OTHER"); |
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126 CHECK_NULL(sfs_OTHER); |
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127 initialized = JNI_TRUE; |
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128 } |
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129 |
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130 static jobject getEnumField(JNIEnv *env, char *name) |
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131 { |
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132 jobject f; |
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133 jfieldID fID = (*env)->GetStaticFieldID(env, sf_status_class, name, |
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134 "Ljdk/net/SocketFlow$Status;"); |
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135 CHECK_NULL_RETURN(fID, NULL); |
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136 |
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137 f = (*env)->GetStaticObjectField(env, sf_status_class, fID); |
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138 CHECK_NULL_RETURN(f, NULL); |
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139 f = (*env)->NewGlobalRef(env, f); |
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140 CHECK_NULL_RETURN(f, NULL); |
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141 return f; |
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142 } |
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143 |
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144 /* |
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145 * Retrieve the int file-descriptor from a public socket type object. |
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146 * Gets impl, then the FileDescriptor from the impl, and then the fd |
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147 * from that. |
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148 */ |
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149 static int getFD(JNIEnv *env, jobject fileDesc) { |
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150 return (*env)->GetIntField(env, fileDesc, sf_fd_fdID); |
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151 } |
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152 |
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153 /** |
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154 * Sets the status field of a SocketFlow to one of the |
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155 * canned enum values |
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156 */ |
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157 static void setStatus (JNIEnv *env, jobject obj, int errval) |
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158 { |
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159 switch (errval) { |
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160 case 0: /* OK */ |
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161 (*env)->SetObjectField(env, obj, sf_status, sfs_OK); |
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162 break; |
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163 case EPERM: |
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164 (*env)->SetObjectField(env, obj, sf_status, sfs_NOPERMISSION); |
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165 break; |
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166 case ENOTCONN: |
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167 (*env)->SetObjectField(env, obj, sf_status, sfs_NOTCONNECTED); |
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168 break; |
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169 case EOPNOTSUPP: |
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170 (*env)->SetObjectField(env, obj, sf_status, sfs_NOTSUPPORTED); |
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171 break; |
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172 case EALREADY: |
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173 (*env)->SetObjectField(env, obj, sf_status, sfs_ALREADYCREATED); |
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174 break; |
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175 case EINPROGRESS: |
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176 (*env)->SetObjectField(env, obj, sf_status, sfs_INPROGRESS); |
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177 break; |
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178 default: |
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179 (*env)->SetObjectField(env, obj, sf_status, sfs_OTHER); |
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180 break; |
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181 } |
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182 } |
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183 |
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184 #ifdef __solaris__ |
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185 |
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186 /* |
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187 * Class: sun_net_ExtendedOptionsImpl |
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188 * Method: setFlowOption |
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189 * Signature: (Ljava/io/FileDescriptor;Ljdk/net/SocketFlow;)V |
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190 */ |
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191 JNIEXPORT void JNICALL Java_sun_net_ExtendedOptionsImpl_setFlowOption |
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192 (JNIEnv *env, jclass UNUSED, jobject fileDesc, jobject flow) |
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193 { |
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194 int fd = getFD(env, fileDesc); |
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195 |
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196 if (fd < 0) { |
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197 NET_ERROR(env, JNU_JAVANETPKG "SocketException", "socket closed"); |
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198 return; |
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199 } else { |
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200 sock_flow_props_t props; |
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201 jlong bandwidth; |
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202 int rv; |
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203 |
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204 jint priority = (*env)->GetIntField(env, flow, sf_priority); |
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205 memset(&props, 0, sizeof(props)); |
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206 props.sfp_version = SOCK_FLOW_PROP_VERSION1; |
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207 |
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208 if (priority != jdk_net_SocketFlow_UNSET) { |
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209 props.sfp_mask |= SFP_PRIORITY; |
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210 props.sfp_priority = priority; |
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211 } |
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212 bandwidth = (*env)->GetLongField(env, flow, sf_bandwidth); |
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213 if (bandwidth > -1) { |
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214 props.sfp_mask |= SFP_MAXBW; |
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215 props.sfp_maxbw = (uint64_t) bandwidth; |
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216 } |
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217 rv = setsockopt(fd, SOL_SOCKET, SO_FLOW_SLA, &props, sizeof(props)); |
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218 if (rv < 0) { |
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219 if (errno == ENOPROTOOPT) { |
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220 JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
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221 "unsupported socket option"); |
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222 } else if (errno == EACCES || errno == EPERM) { |
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223 NET_ERROR(env, JNU_JAVANETPKG "SocketException", |
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224 "Permission denied"); |
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225 } else { |
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226 NET_ERROR(env, JNU_JAVANETPKG "SocketException", |
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227 "set option SO_FLOW_SLA failed"); |
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228 } |
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229 return; |
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230 } |
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231 setStatus(env, flow, props.sfp_status); |
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232 } |
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233 } |
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234 |
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235 /* |
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236 * Class: sun_net_ExtendedOptionsImpl |
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237 * Method: getFlowOption |
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238 * Signature: (Ljava/io/FileDescriptor;Ljdk/net/SocketFlow;)V |
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239 */ |
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240 JNIEXPORT void JNICALL Java_sun_net_ExtendedOptionsImpl_getFlowOption |
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241 (JNIEnv *env, jclass UNUSED, jobject fileDesc, jobject flow) |
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242 { |
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243 int fd = getFD(env, fileDesc); |
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244 |
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245 if (fd < 0) { |
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246 NET_ERROR(env, JNU_JAVANETPKG "SocketException", "socket closed"); |
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247 return; |
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248 } else { |
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249 sock_flow_props_t props; |
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250 int status; |
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251 socklen_t sz = sizeof(props); |
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252 |
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253 int rv = getsockopt(fd, SOL_SOCKET, SO_FLOW_SLA, &props, &sz); |
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254 if (rv < 0) { |
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255 if (errno == ENOPROTOOPT) { |
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256 JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
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257 "unsupported socket option"); |
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258 } else if (errno == EACCES || errno == EPERM) { |
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259 NET_ERROR(env, JNU_JAVANETPKG "SocketException", |
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260 "Permission denied"); |
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261 } else { |
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262 NET_ERROR(env, JNU_JAVANETPKG "SocketException", |
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263 "set option SO_FLOW_SLA failed"); |
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264 } |
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265 return; |
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266 } |
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267 /* first check status to see if flow exists */ |
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268 status = props.sfp_status; |
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269 setStatus(env, flow, status); |
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270 if (status == 0) { /* OK */ |
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271 /* can set the other fields now */ |
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272 if (props.sfp_mask & SFP_PRIORITY) { |
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273 (*env)->SetIntField(env, flow, sf_priority, props.sfp_priority); |
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274 } |
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275 if (props.sfp_mask & SFP_MAXBW) { |
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276 (*env)->SetLongField(env, flow, sf_bandwidth, |
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277 (jlong)props.sfp_maxbw); |
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278 } |
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279 } |
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280 } |
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281 } |
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282 |
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283 static jboolean flowsupported; |
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284 static jboolean flowsupported_set = JNI_FALSE; |
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285 |
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286 static jboolean flowSupported0() |
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287 { |
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288 /* Do a simple dummy call, and try to figure out from that */ |
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289 sock_flow_props_t props; |
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290 int rv, s; |
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291 if (flowsupported_set) { |
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292 return flowsupported; |
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293 } |
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294 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); |
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295 if (s < 0) { |
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296 flowsupported = JNI_FALSE; |
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297 flowsupported_set = JNI_TRUE; |
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298 return JNI_FALSE; |
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299 } |
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300 memset(&props, 0, sizeof(props)); |
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301 props.sfp_version = SOCK_FLOW_PROP_VERSION1; |
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302 props.sfp_mask |= SFP_PRIORITY; |
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303 props.sfp_priority = SFP_PRIO_NORMAL; |
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304 rv = setsockopt(s, SOL_SOCKET, SO_FLOW_SLA, &props, sizeof(props)); |
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305 if (rv != 0 && errno == ENOPROTOOPT) { |
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306 rv = JNI_FALSE; |
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307 } else { |
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308 rv = JNI_TRUE; |
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309 } |
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310 close(s); |
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311 flowsupported = rv; |
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312 flowsupported_set = JNI_TRUE; |
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313 return flowsupported; |
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314 } |
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315 |
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316 #else /* __solaris__ */ |
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317 |
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318 /* Non Solaris. Functionality is not supported. So, throw UnsupportedOpExc */ |
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319 |
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320 JNIEXPORT void JNICALL Java_sun_net_ExtendedOptionsImpl_setFlowOption |
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321 (JNIEnv *env, jclass UNUSED, jobject fileDesc, jobject flow) |
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322 { |
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323 JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
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324 "unsupported socket option"); |
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325 } |
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326 |
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327 JNIEXPORT void JNICALL Java_sun_net_ExtendedOptionsImpl_getFlowOption |
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328 (JNIEnv *env, jclass UNUSED, jobject fileDesc, jobject flow) |
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329 { |
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330 JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
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331 "unsupported socket option"); |
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332 } |
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333 |
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334 static jboolean flowSupported0() { |
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335 return JNI_FALSE; |
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336 } |
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337 |
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338 #endif /* __solaris__ */ |
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339 |
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340 JNIEXPORT jboolean JNICALL Java_sun_net_ExtendedOptionsImpl_flowSupported |
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341 (JNIEnv *env, jclass UNUSED) |
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342 { |
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343 return flowSupported0(); |
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344 } |
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