Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
Elliott Hughes | abf945f | 2010-06-03 19:55:20 -0700 | [diff] [blame] | 17 | #define LOG_TAG "NetworkUtilities" |
| 18 | |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 19 | #include "NetworkUtilities.h" |
| 20 | #include "JNIHelp.h" |
Elliott Hughes | a9f5c16 | 2010-06-16 16:32:18 -0700 | [diff] [blame] | 21 | #include "JniConstants.h" |
Elliott Hughes | e9f1204 | 2011-05-11 11:48:46 -0700 | [diff] [blame] | 22 | #include "ScopedLocalRef.h" |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 23 | |
| 24 | #include <arpa/inet.h> |
Elliott Hughes | 3b0a5b9 | 2010-07-22 15:06:54 -0700 | [diff] [blame] | 25 | #include <fcntl.h> |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 26 | #include <stdio.h> |
| 27 | #include <string.h> |
Elliott Hughes | 4f11ebe | 2011-04-19 15:38:10 -0700 | [diff] [blame] | 28 | #include <sys/socket.h> |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 29 | #include <sys/un.h> |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 30 | |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 31 | jobject sockaddrToInetAddress(JNIEnv* env, const sockaddr_storage& ss, jint* port) { |
Elliott Hughes | 4664da5 | 2011-05-06 17:09:43 -0700 | [diff] [blame] | 32 | // Convert IPv4-mapped IPv6 addresses to IPv4 addresses. |
Elliott Hughes | 1c039d7 | 2011-05-04 16:04:04 -0700 | [diff] [blame] | 33 | // The RI states "Java will never return an IPv4-mapped address". |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 34 | const sockaddr_in6& sin6 = reinterpret_cast<const sockaddr_in6&>(ss); |
| 35 | if (ss.ss_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { |
Elliott Hughes | 1c039d7 | 2011-05-04 16:04:04 -0700 | [diff] [blame] | 36 | // Copy the IPv6 address into the temporary sockaddr_storage. |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 37 | sockaddr_storage tmp; |
| 38 | memset(&tmp, 0, sizeof(tmp)); |
| 39 | memcpy(&tmp, &ss, sizeof(sockaddr_in6)); |
Elliott Hughes | 1c039d7 | 2011-05-04 16:04:04 -0700 | [diff] [blame] | 40 | // Unmap it into an IPv4 address. |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 41 | sockaddr_in& sin = reinterpret_cast<sockaddr_in&>(tmp); |
| 42 | sin.sin_family = AF_INET; |
| 43 | sin.sin_port = sin6.sin6_port; |
| 44 | memcpy(&sin.sin_addr.s_addr, &sin6.sin6_addr.s6_addr[12], 4); |
| 45 | // Do the regular conversion using the unmapped address. |
| 46 | return sockaddrToInetAddress(env, tmp, port); |
Elliott Hughes | 1c039d7 | 2011-05-04 16:04:04 -0700 | [diff] [blame] | 47 | } |
| 48 | |
Elliott Hughes | 0a9d1ee | 2011-03-30 15:35:16 -0700 | [diff] [blame] | 49 | const void* rawAddress; |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 50 | size_t addressLength; |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 51 | int sin_port = 0; |
Elliott Hughes | 4728a01 | 2011-05-19 11:30:51 -0700 | [diff] [blame] | 52 | int scope_id = 0; |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 53 | if (ss.ss_family == AF_INET) { |
| 54 | const sockaddr_in& sin = reinterpret_cast<const sockaddr_in&>(ss); |
| 55 | rawAddress = &sin.sin_addr.s_addr; |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 56 | addressLength = 4; |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 57 | sin_port = ntohs(sin.sin_port); |
| 58 | } else if (ss.ss_family == AF_INET6) { |
| 59 | const sockaddr_in6& sin6 = reinterpret_cast<const sockaddr_in6&>(ss); |
| 60 | rawAddress = &sin6.sin6_addr.s6_addr; |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 61 | addressLength = 16; |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 62 | sin_port = ntohs(sin6.sin6_port); |
| 63 | scope_id = sin6.sin6_scope_id; |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 64 | } else { |
Elliott Hughes | 91ad12a | 2010-07-26 14:13:55 -0700 | [diff] [blame] | 65 | // We can't throw SocketException. We aren't meant to see bad addresses, so seeing one |
| 66 | // really does imply an internal error. |
Elliott Hughes | 51236bf | 2011-04-08 17:21:47 -0700 | [diff] [blame] | 67 | jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 68 | "sockaddrToInetAddress unsupported ss_family: %i", ss.ss_family); |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 69 | return NULL; |
| 70 | } |
Elliott Hughes | 23ec091 | 2011-05-18 18:21:17 -0700 | [diff] [blame] | 71 | if (port != NULL) { |
Elliott Hughes | 4728a01 | 2011-05-19 11:30:51 -0700 | [diff] [blame] | 72 | *port = sin_port; |
Elliott Hughes | 23ec091 | 2011-05-18 18:21:17 -0700 | [diff] [blame] | 73 | } |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 74 | |
Elliott Hughes | d8cec78 | 2011-06-20 18:03:37 -0700 | [diff] [blame] | 75 | ScopedLocalRef<jbyteArray> byteArray(env, env->NewByteArray(addressLength)); |
| 76 | if (byteArray.get() == NULL) { |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 77 | return NULL; |
| 78 | } |
Elliott Hughes | d8cec78 | 2011-06-20 18:03:37 -0700 | [diff] [blame] | 79 | env->SetByteArrayRegion(byteArray.get(), 0, addressLength, |
| 80 | reinterpret_cast<const jbyte*>(rawAddress)); |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 81 | |
Elliott Hughes | 49ff8b8 | 2011-05-06 14:23:01 -0700 | [diff] [blame] | 82 | static jmethodID getByAddressMethod = env->GetStaticMethodID(JniConstants::inetAddressClass, |
Elliott Hughes | 4728a01 | 2011-05-19 11:30:51 -0700 | [diff] [blame] | 83 | "getByAddress", "(Ljava/lang/String;[BI)Ljava/net/InetAddress;"); |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 84 | if (getByAddressMethod == NULL) { |
| 85 | return NULL; |
| 86 | } |
Elliott Hughes | 4728a01 | 2011-05-19 11:30:51 -0700 | [diff] [blame] | 87 | return env->CallStaticObjectMethod(JniConstants::inetAddressClass, getByAddressMethod, |
Elliott Hughes | d8cec78 | 2011-06-20 18:03:37 -0700 | [diff] [blame] | 88 | NULL, byteArray.get(), scope_id); |
Elliott Hughes | 753dcd8 | 2010-06-01 18:07:56 -0700 | [diff] [blame] | 89 | } |
| 90 | |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 91 | static bool inetAddressToSockaddr(JNIEnv* env, jobject inetAddress, int port, sockaddr_storage& ss, socklen_t& sa_len, bool map) { |
| 92 | memset(&ss, 0, sizeof(ss)); |
| 93 | sa_len = 0; |
Elliott Hughes | c06e5e2 | 2011-05-04 19:00:47 -0700 | [diff] [blame] | 94 | |
Elliott Hughes | 8398239 | 2011-03-31 16:45:18 -0700 | [diff] [blame] | 95 | if (inetAddress == NULL) { |
| 96 | jniThrowNullPointerException(env, NULL); |
| 97 | return false; |
| 98 | } |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 99 | |
Piotr Jastrzebski | f7ab2bc | 2015-05-06 14:00:00 +0100 | [diff] [blame] | 100 | // Get holder. |
| 101 | static jfieldID holderFid = env->GetFieldID(JniConstants::inetAddressClass, "holder", "Ljava/net/InetAddress$InetAddressHolder;"); |
| 102 | ScopedLocalRef<jobject> holder(env, env->GetObjectField(inetAddress, holderFid)); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 103 | // Get the address family. |
Piotr Jastrzebski | f7ab2bc | 2015-05-06 14:00:00 +0100 | [diff] [blame] | 104 | static jfieldID familyFid = env->GetFieldID(JniConstants::inetAddressHolderClass, "family", "I"); |
| 105 | ss.ss_family = env->GetIntField(holder.get(), familyFid); |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 106 | if (ss.ss_family == AF_UNSPEC) { |
Elliott Hughes | d52f91a | 2013-03-21 23:55:03 -0700 | [diff] [blame] | 107 | sa_len = sizeof(ss.ss_family); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 108 | return true; // Job done! |
| 109 | } |
| 110 | |
| 111 | // Check this is an address family we support. |
Neil Fuller | 0ab1a26 | 2015-07-07 17:03:25 +0100 | [diff] [blame] | 112 | if (ss.ss_family != AF_INET && ss.ss_family != AF_INET6) { |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 113 | jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 114 | "inetAddressToSockaddr bad family: %i", ss.ss_family); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 115 | return false; |
| 116 | } |
| 117 | |
| 118 | // Get the byte array that stores the IP address bytes in the InetAddress. |
Przemyslaw Szczepaniak | 68b1892 | 2016-02-08 14:40:37 +0000 | [diff] [blame] | 119 | static jmethodID bytesMid = env->GetMethodID(JniConstants::inetAddressClass, "getAddress", "()[B"); |
Piotr Jastrzebski | f7ab2bc | 2015-05-06 14:00:00 +0100 | [diff] [blame] | 120 | ScopedLocalRef<jbyteArray> addressBytes(env, reinterpret_cast<jbyteArray>(env->CallObjectMethod(inetAddress, bytesMid))); |
Przemyslaw Szczepaniak | 68b1892 | 2016-02-08 14:40:37 +0000 | [diff] [blame] | 121 | if (env->ExceptionCheck()) { |
| 122 | return false; |
| 123 | } |
Elliott Hughes | e9f1204 | 2011-05-11 11:48:46 -0700 | [diff] [blame] | 124 | if (addressBytes.get() == NULL) { |
Elliott Hughes | c06e5e2 | 2011-05-04 19:00:47 -0700 | [diff] [blame] | 125 | jniThrowNullPointerException(env, NULL); |
| 126 | return false; |
| 127 | } |
| 128 | |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 129 | // TODO: bionic's getnameinfo(3) seems to want its length parameter to be exactly |
| 130 | // sizeof(sockaddr_in) for an IPv4 address and sizeof (sockaddr_in6) for an |
| 131 | // IPv6 address. Fix getnameinfo so it accepts sizeof(sockaddr_storage), and |
| 132 | // then unconditionally set sa_len to sizeof(sockaddr_storage) instead of having |
| 133 | // to deal with this case by case. |
| 134 | |
Elliott Hughes | 4664da5 | 2011-05-06 17:09:43 -0700 | [diff] [blame] | 135 | // We use AF_INET6 sockets, so we want an IPv6 address (which may be a IPv4-mapped address). |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 136 | sockaddr_in6& sin6 = reinterpret_cast<sockaddr_in6&>(ss); |
| 137 | sin6.sin6_port = htons(port); |
| 138 | if (ss.ss_family == AF_INET6) { |
Elliott Hughes | 4664da5 | 2011-05-06 17:09:43 -0700 | [diff] [blame] | 139 | // IPv6 address. Copy the bytes... |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 140 | jbyte* dst = reinterpret_cast<jbyte*>(&sin6.sin6_addr.s6_addr); |
Elliott Hughes | e9f1204 | 2011-05-11 11:48:46 -0700 | [diff] [blame] | 141 | env->GetByteArrayRegion(addressBytes.get(), 0, 16, dst); |
Elliott Hughes | 4664da5 | 2011-05-06 17:09:43 -0700 | [diff] [blame] | 142 | // ...and set the scope id... |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 143 | static jfieldID scopeFid = env->GetFieldID(JniConstants::inet6AddressClass, "scope_id", "I"); |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 144 | sin6.sin6_scope_id = env->GetIntField(inetAddress, scopeFid); |
| 145 | sa_len = sizeof(sockaddr_in6); |
Elliott Hughes | c06e5e2 | 2011-05-04 19:00:47 -0700 | [diff] [blame] | 146 | return true; |
| 147 | } |
| 148 | |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 149 | // Deal with Inet4Address instances. |
| 150 | if (map) { |
| 151 | // We should represent this Inet4Address as an IPv4-mapped IPv6 sockaddr_in6. |
| 152 | // Change the family... |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 153 | sin6.sin6_family = AF_INET6; |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 154 | // Copy the bytes... |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 155 | jbyte* dst = reinterpret_cast<jbyte*>(&sin6.sin6_addr.s6_addr[12]); |
Elliott Hughes | e9f1204 | 2011-05-11 11:48:46 -0700 | [diff] [blame] | 156 | env->GetByteArrayRegion(addressBytes.get(), 0, 4, dst); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 157 | // INADDR_ANY and in6addr_any are both all-zeros... |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 158 | if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 159 | // ...but all other IPv4-mapped addresses are ::ffff:a.b.c.d, so insert the ffff... |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 160 | memset(&(sin6.sin6_addr.s6_addr[10]), 0xff, 2); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 161 | } |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 162 | sa_len = sizeof(sockaddr_in6); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 163 | } else { |
| 164 | // We should represent this Inet4Address as an IPv4 sockaddr_in. |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 165 | sockaddr_in& sin = reinterpret_cast<sockaddr_in&>(ss); |
| 166 | sin.sin_port = htons(port); |
| 167 | jbyte* dst = reinterpret_cast<jbyte*>(&sin.sin_addr.s_addr); |
Elliott Hughes | e9f1204 | 2011-05-11 11:48:46 -0700 | [diff] [blame] | 168 | env->GetByteArrayRegion(addressBytes.get(), 0, 4, dst); |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 169 | sa_len = sizeof(sockaddr_in); |
Elliott Hughes | 32b0fa4 | 2011-05-10 16:07:38 -0700 | [diff] [blame] | 170 | } |
| 171 | return true; |
Elliott Hughes | 8398239 | 2011-03-31 16:45:18 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 174 | bool inetAddressToSockaddrVerbatim(JNIEnv* env, jobject inetAddress, int port, sockaddr_storage& ss, socklen_t& sa_len) { |
| 175 | return inetAddressToSockaddr(env, inetAddress, port, ss, sa_len, false); |
Elliott Hughes | 4664da5 | 2011-05-06 17:09:43 -0700 | [diff] [blame] | 176 | } |
| 177 | |
Elliott Hughes | 482a3fc | 2013-03-20 16:10:12 -0700 | [diff] [blame] | 178 | bool inetAddressToSockaddr(JNIEnv* env, jobject inetAddress, int port, sockaddr_storage& ss, socklen_t& sa_len) { |
| 179 | return inetAddressToSockaddr(env, inetAddress, port, ss, sa_len, true); |
Elliott Hughes | 4664da5 | 2011-05-06 17:09:43 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Elliott Hughes | 440ba56 | 2010-08-04 10:44:16 -0700 | [diff] [blame] | 182 | bool setBlocking(int fd, bool blocking) { |
Elliott Hughes | 3b0a5b9 | 2010-07-22 15:06:54 -0700 | [diff] [blame] | 183 | int flags = fcntl(fd, F_GETFL); |
| 184 | if (flags == -1) { |
| 185 | return false; |
| 186 | } |
| 187 | |
Elliott Hughes | 440ba56 | 2010-08-04 10:44:16 -0700 | [diff] [blame] | 188 | if (!blocking) { |
Elliott Hughes | 3b0a5b9 | 2010-07-22 15:06:54 -0700 | [diff] [blame] | 189 | flags |= O_NONBLOCK; |
| 190 | } else { |
| 191 | flags &= ~O_NONBLOCK; |
| 192 | } |
| 193 | |
| 194 | int rc = fcntl(fd, F_SETFL, flags); |
| 195 | return (rc != -1); |
| 196 | } |