The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "InetAddress" |
| 18 | |
Mike Lockwood | b63989a | 2009-05-28 10:19:17 -0400 | [diff] [blame] | 19 | #define LOG_DNS 0 |
| 20 | |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 21 | #include "JNIHelp.h" |
| 22 | #include "utils/Log.h" |
| 23 | #include "jni.h" |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 27 | #include <netdb.h> |
| 28 | #include <errno.h> |
| 29 | |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 30 | #include <netinet/in.h> |
| 31 | #include <arpa/inet.h> |
| 32 | #include <sys/socket.h> |
| 33 | |
| 34 | |
| 35 | static jclass byteArrayClass = NULL; |
| 36 | |
Brian Carlstrom | 44e0e56 | 2010-05-06 23:44:16 -0700 | [diff] [blame^] | 37 | static jstring InetAddress_gethostname(JNIEnv* env, jclass) |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 38 | { |
| 39 | char name[256]; |
| 40 | int r = gethostname(name, 256); |
| 41 | if (r == 0) { |
| 42 | return env->NewStringUTF(name); |
| 43 | } else { |
| 44 | return NULL; |
| 45 | } |
| 46 | } |
| 47 | |
Mike Lockwood | b63989a | 2009-05-28 10:19:17 -0400 | [diff] [blame] | 48 | #if LOG_DNS |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 49 | static void logIpString(struct addrinfo* ai, const char* name) |
| 50 | { |
| 51 | char ipString[INET6_ADDRSTRLEN]; |
| 52 | int result = getnameinfo(ai->ai_addr, ai->ai_addrlen, ipString, |
| 53 | sizeof(ipString), NULL, 0, NI_NUMERICHOST); |
| 54 | if (result == 0) { |
| 55 | LOGD("%s: %s (family %d, proto %d)", name, ipString, ai->ai_family, |
| 56 | ai->ai_protocol); |
| 57 | } else { |
| 58 | LOGE("%s: getnameinfo: %s", name, gai_strerror(result)); |
| 59 | } |
| 60 | } |
Mike Lockwood | b63989a | 2009-05-28 10:19:17 -0400 | [diff] [blame] | 61 | #else |
Brian Carlstrom | 44e0e56 | 2010-05-06 23:44:16 -0700 | [diff] [blame^] | 62 | static inline void logIpString(struct addrinfo*, const char*) |
Mike Lockwood | b63989a | 2009-05-28 10:19:17 -0400 | [diff] [blame] | 63 | { |
| 64 | } |
| 65 | #endif |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 66 | |
Elliott Hughes | 048303b | 2010-01-15 18:25:27 -0800 | [diff] [blame] | 67 | static jobjectArray InetAddress_getaddrinfoImpl(JNIEnv* env, const char* name) { |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 68 | struct addrinfo hints, *addressList = NULL, *addrInfo; |
| 69 | jobjectArray addressArray = NULL; |
| 70 | |
| 71 | memset(&hints, 0, sizeof(hints)); |
Lorenzo Colitti | 723edb3 | 2009-08-18 16:14:33 -0700 | [diff] [blame] | 72 | hints.ai_family = AF_UNSPEC; |
| 73 | hints.ai_flags = AI_ADDRCONFIG; |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 74 | /* |
| 75 | * If we don't specify a socket type, every address will appear twice, once |
| 76 | * for SOCK_STREAM and one for SOCK_DGRAM. Since we do not return the family |
| 77 | * anyway, just pick one. |
| 78 | */ |
| 79 | hints.ai_socktype = SOCK_STREAM; |
| 80 | |
| 81 | int result = getaddrinfo(name, NULL, &hints, &addressList); |
| 82 | if (result == 0 && addressList) { |
| 83 | // Count results so we know how to size the output array. |
| 84 | int addressCount = 0; |
| 85 | for (addrInfo = addressList; addrInfo; addrInfo = addrInfo->ai_next) { |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 86 | if (addrInfo->ai_family == AF_INET || addrInfo->ai_family == AF_INET6) { |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 87 | addressCount++; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | // Prepare output array. |
| 92 | addressArray = env->NewObjectArray(addressCount, byteArrayClass, NULL); |
| 93 | if (addressArray == NULL) { |
| 94 | // Appropriate exception will be thrown. |
Elliott Hughes | 048303b | 2010-01-15 18:25:27 -0800 | [diff] [blame] | 95 | LOGE("getaddrinfo: could not allocate array of size %i", addressCount); |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 96 | freeaddrinfo(addressList); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 97 | return NULL; |
| 98 | } |
| 99 | |
| 100 | // Examine returned addresses one by one, save them in the output array. |
| 101 | int index = 0; |
| 102 | for (addrInfo = addressList; addrInfo; addrInfo = addrInfo->ai_next) { |
| 103 | struct sockaddr* address = addrInfo->ai_addr; |
| 104 | size_t addressLength = 0; |
| 105 | void* rawAddress; |
| 106 | |
| 107 | switch (addrInfo->ai_family) { |
| 108 | // Find the raw address length and start pointer. |
| 109 | case AF_INET6: |
| 110 | addressLength = 16; |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 111 | rawAddress = &((struct sockaddr_in6*) address)->sin6_addr.s6_addr; |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 112 | logIpString(addrInfo, name); |
| 113 | break; |
| 114 | case AF_INET: |
| 115 | addressLength = 4; |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 116 | rawAddress = &((struct sockaddr_in*) address)->sin_addr.s_addr; |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 117 | logIpString(addrInfo, name); |
| 118 | break; |
| 119 | default: |
| 120 | // Unknown address family. Skip this address. |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 121 | LOGE("getaddrinfo: Unknown address family %d", addrInfo->ai_family); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 122 | continue; |
| 123 | } |
| 124 | |
| 125 | // Convert each IP address into a Java byte array. |
| 126 | jbyteArray bytearray = env->NewByteArray(addressLength); |
| 127 | if (bytearray == NULL) { |
| 128 | // Out of memory error will be thrown on return. |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 129 | LOGE("getaddrinfo: Can't allocate %d-byte array", addressLength); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 130 | addressArray = NULL; |
| 131 | break; |
| 132 | } |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 133 | env->SetByteArrayRegion(bytearray, 0, addressLength, (jbyte*) rawAddress); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 134 | env->SetObjectArrayElement(addressArray, index, bytearray); |
| 135 | env->DeleteLocalRef(bytearray); |
| 136 | index++; |
| 137 | } |
| 138 | } else if (result == EAI_SYSTEM && errno == EACCES) { |
| 139 | /* No permission to use network */ |
Elliott Hughes | da4f31d | 2010-01-28 13:43:39 -0800 | [diff] [blame] | 140 | jniThrowException(env, "java/lang/SecurityException", |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 141 | "Permission denied (maybe missing INTERNET permission)"); |
| 142 | } else { |
Elliott Hughes | 7ca6fd0 | 2010-03-29 20:51:48 -0700 | [diff] [blame] | 143 | jniThrowException(env, "java/net/UnknownHostException", gai_strerror(result)); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | if (addressList) { |
| 147 | freeaddrinfo(addressList); |
| 148 | } |
| 149 | |
| 150 | return addressArray; |
| 151 | } |
| 152 | |
Brian Carlstrom | 44e0e56 | 2010-05-06 23:44:16 -0700 | [diff] [blame^] | 153 | jobjectArray InetAddress_getaddrinfo(JNIEnv* env, jclass, jstring javaName) { |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 154 | if (javaName == NULL) { |
Elliott Hughes | da4f31d | 2010-01-28 13:43:39 -0800 | [diff] [blame] | 155 | jniThrowNullPointerException(env, NULL); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 156 | return NULL; |
| 157 | } |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 158 | const char* name = env->GetStringUTFChars(javaName, NULL); |
Elliott Hughes | 048303b | 2010-01-15 18:25:27 -0800 | [diff] [blame] | 159 | jobjectArray out = InetAddress_getaddrinfoImpl(env, name); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 160 | env->ReleaseStringUTFChars(javaName, name); |
| 161 | return out; |
| 162 | } |
| 163 | |
| 164 | |
Lorenzo Colitti | aa47938 | 2009-08-26 18:41:06 -0700 | [diff] [blame] | 165 | /** |
| 166 | * Looks up the name corresponding to an IP address. |
| 167 | * |
| 168 | * @param javaAddress: a byte array containing the raw IP address bytes. Must be |
| 169 | * 4 or 16 bytes long. |
| 170 | * @return the hostname. |
| 171 | * @throws UnknownHostException: the IP address has no associated hostname. |
| 172 | */ |
Brian Carlstrom | 44e0e56 | 2010-05-06 23:44:16 -0700 | [diff] [blame^] | 173 | static jstring InetAddress_getnameinfo(JNIEnv* env, jclass, |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 174 | jbyteArray javaAddress) |
| 175 | { |
| 176 | if (javaAddress == NULL) { |
Elliott Hughes | da4f31d | 2010-01-28 13:43:39 -0800 | [diff] [blame] | 177 | jniThrowNullPointerException(env, NULL); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 178 | return NULL; |
| 179 | } |
| 180 | |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 181 | // Convert the raw address bytes into a socket address structure. |
| 182 | struct sockaddr_storage ss; |
Lorenzo Colitti | aa47938 | 2009-08-26 18:41:06 -0700 | [diff] [blame] | 183 | memset(&ss, 0, sizeof(ss)); |
Elliott Hughes | 44550df | 2009-09-08 19:44:54 -0700 | [diff] [blame] | 184 | |
| 185 | size_t socklen; |
| 186 | const size_t addressLength = env->GetArrayLength(javaAddress); |
| 187 | if (addressLength == 4) { |
| 188 | struct sockaddr_in* sin = reinterpret_cast<sockaddr_in*>(&ss); |
| 189 | sin->sin_family = AF_INET; |
| 190 | socklen = sizeof(struct sockaddr_in); |
| 191 | jbyte* dst = reinterpret_cast<jbyte*>(&sin->sin_addr.s_addr); |
| 192 | env->GetByteArrayRegion(javaAddress, 0, 4, dst); |
| 193 | } else if (addressLength == 16) { |
| 194 | struct sockaddr_in6 *sin6 = reinterpret_cast<sockaddr_in6*>(&ss); |
| 195 | sin6->sin6_family = AF_INET6; |
| 196 | socklen = sizeof(struct sockaddr_in6); |
| 197 | jbyte* dst = reinterpret_cast<jbyte*>(&sin6->sin6_addr.s6_addr); |
| 198 | env->GetByteArrayRegion(javaAddress, 0, 16, dst); |
| 199 | } else { |
| 200 | // The caller already throws an exception in this case. Don't worry |
| 201 | // about it here. |
| 202 | return NULL; |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 203 | } |
| 204 | |
Lorenzo Colitti | aa47938 | 2009-08-26 18:41:06 -0700 | [diff] [blame] | 205 | // Look up the host name from the IP address. |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 206 | char name[NI_MAXHOST]; |
Elliott Hughes | 44550df | 2009-09-08 19:44:54 -0700 | [diff] [blame] | 207 | int ret = getnameinfo(reinterpret_cast<sockaddr*>(&ss), socklen, |
| 208 | name, sizeof(name), NULL, 0, NI_NAMEREQD); |
| 209 | if (ret != 0) { |
| 210 | jniThrowException(env, "java/net/UnknownHostException", gai_strerror(ret)); |
| 211 | return NULL; |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 212 | } |
| 213 | |
Elliott Hughes | 44550df | 2009-09-08 19:44:54 -0700 | [diff] [blame] | 214 | return env->NewStringUTF(name); |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 215 | } |
| 216 | |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 217 | static JNINativeMethod gMethods[] = { |
Elliott Hughes | 048303b | 2010-01-15 18:25:27 -0800 | [diff] [blame] | 218 | { "getaddrinfo", "(Ljava/lang/String;)[[B", (void*) InetAddress_getaddrinfo }, |
| 219 | { "gethostname", "()Ljava/lang/String;", (void*) InetAddress_gethostname }, |
| 220 | { "getnameinfo", "([B)Ljava/lang/String;", (void*) InetAddress_getnameinfo }, |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 221 | }; |
Elliott Hughes | c08f9fb | 2010-04-16 17:44:12 -0700 | [diff] [blame] | 222 | int register_java_net_InetAddress(JNIEnv* env) { |
The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame] | 223 | jclass tempClass = env->FindClass("[B"); |
| 224 | if (tempClass) { |
| 225 | byteArrayClass = (jclass) env->NewGlobalRef(tempClass); |
| 226 | } |
| 227 | if (!byteArrayClass) { |
| 228 | LOGE("register_java_net_InetAddress: cannot allocate byte array class"); |
| 229 | return -1; |
| 230 | } |
| 231 | return jniRegisterNativeMethods(env, "java/net/InetAddress", |
| 232 | gMethods, NELEM(gMethods)); |
| 233 | } |