11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include <stdlib.h> 27 #include <errno.h> 28 #include <string.h> 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 32 #include "jvm.h" 33 #include "jni_util.h" 34 #include "net_util.h" 35 36 #include "java_net_SocketInputStream.h" 37 38 39 /************************************************************************ 40 * SocketInputStream 41 */ 42 43 static jfieldID IO_fd_fdID; 44 45 /* 46 * Class: java_net_SocketInputStream 47 * Method: init 48 * Signature: ()V 49 */ 50 JNIEXPORT void JNICALL 51 Java_java_net_SocketInputStream_init(JNIEnv *env, jclass cls) { 52 IO_fd_fdID = NET_GetFileDescriptorID(env); 53 } 54 55 /* 56 * Class: java_net_SocketInputStream 57 * Method: socketRead0 58 * Signature: (Ljava/io/FileDescriptor;[BIII)I 59 */ 60 JNIEXPORT jint JNICALL 61 Java_java_net_SocketInputStream_socketRead0(JNIEnv *env, jobject this, 62 jobject fdObj, jbyteArray data, 63 jint off, jint len, jint timeout) 64 { 65 char BUF[MAX_BUFFER_LEN]; 66 char *bufP; 67 jint fd, nread; 68 69 if (IS_NULL(fdObj)) { 70 /* shouldn't this be a NullPointerException? -br */ 71 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", 72 "Socket closed"); 73 return -1; 74 } else { 81 return -1; 82 } 83 } 84 85 /* 86 * If the read is greater than our stack allocated buffer then 87 * we allocate from the heap (up to a limit) 88 */ 89 if (len > MAX_BUFFER_LEN) { 90 if (len > MAX_HEAP_BUFFER_LEN) { 91 len = MAX_HEAP_BUFFER_LEN; 92 } 93 bufP = (char *)malloc((size_t)len); 94 if (bufP == NULL) { 95 bufP = BUF; 96 len = MAX_BUFFER_LEN; 97 } 98 } else { 99 bufP = BUF; 100 } 101 102 if (timeout) { 103 nread = NET_Timeout(fd, timeout); 104 if (nread <= 0) { 105 if (nread == 0) { 106 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException", 107 "Read timed out"); 108 } else if (nread == -1) { 109 if (errno == EBADF) { 110 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed"); 111 } else if (errno == ENOMEM) { 112 JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed"); 113 } else { 114 JNU_ThrowByNameWithMessageAndLastError 115 (env, JNU_JAVANETPKG "SocketException", "select/poll failed"); 116 } 117 } 118 if (bufP != BUF) { 119 free(bufP); 120 } 121 return -1; 122 } 123 } 124 125 nread = NET_Read(fd, bufP, len); 126 127 if (nread <= 0) { 128 if (nread < 0) { 129 130 switch (errno) { 131 case ECONNRESET: 132 case EPIPE: 133 JNU_ThrowByName(env, "sun/net/ConnectionResetException", 134 "Connection reset"); 135 break; 136 137 case EBADF: 138 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", 139 "Socket closed"); 140 break; 141 142 case EINTR: 143 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException", 144 "Operation interrupted"); 145 break; 146 147 default: 148 JNU_ThrowByNameWithMessageAndLastError 149 (env, JNU_JAVANETPKG "SocketException", "Read failed"); 150 } 151 } 152 } else { 153 (*env)->SetByteArrayRegion(env, data, off, nread, (jbyte *)bufP); 154 } 155 156 if (bufP != BUF) { 157 free(bufP); 158 } 159 return nread; 160 } | 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include <stdlib.h> 27 #include <errno.h> 28 #include <string.h> 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 #include <sys/time.h> 32 #include "jvm.h" 33 #include "jni_util.h" 34 #include "net_util.h" 35 36 #include "java_net_SocketInputStream.h" 37 38 /************************************************************************ 39 * SocketInputStream 40 */ 41 42 static jfieldID IO_fd_fdID; 43 44 /* 45 * Class: java_net_SocketInputStream 46 * Method: init 47 * Signature: ()V 48 */ 49 JNIEXPORT void JNICALL 50 Java_java_net_SocketInputStream_init(JNIEnv *env, jclass cls) { 51 IO_fd_fdID = NET_GetFileDescriptorID(env); 52 } 53 54 static long getCurrentTime() { 55 struct timeval time; 56 gettimeofday(&time, NULL); 57 return (time.tv_sec * 1000 + time.tv_usec / 1000); 58 } 59 60 static int NET_TimeoutWithCurrentTime(int s, long timeout, long current_time) { 61 int result; 62 long prevtime = current_time, newtime; 63 struct pollfd pfd; 64 pfd.fd = s; 65 pfd.events = POLLIN; 66 for (;;) { 67 result = poll(&pfd, 1, timeout); 68 if (result < 0 && errno == EINTR) { 69 if (timeout > 0) { 70 newtime = getCurrentTime(); 71 timeout -= newtime - prevtime; 72 if (timeout <= 0) 73 return 0; 74 prevtime = newtime; 75 } 76 } else { 77 return result; 78 } 79 } 80 } 81 82 static int NET_ReadWithTimeout(JNIEnv *env, int fd, char *bufP, int len, long timeout) { 83 int result; 84 long prevtime = getCurrentTime(), newtime; 85 while (timeout > 0) { 86 result = NET_TimeoutWithCurrentTime(fd, timeout, prevtime); 87 if (result <= 0) { 88 if (result == 0) { 89 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException", "Read timed out"); 90 } else if (result == -1) { 91 if (errno == EBADF) { 92 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed"); 93 } else if (errno == ENOMEM) { 94 JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed"); 95 } else { 96 JNU_ThrowByNameWithMessageAndLastError 97 (env, JNU_JAVANETPKG "SocketException", "select/poll failed"); 98 } 99 } 100 return -1; 101 } 102 result = NET_NonBlockingRead(fd, bufP, len); 103 if (result == -1 && ((errno == EAGAIN) || (errno == EWOULDBLOCK))) { 104 newtime = getCurrentTime(); 105 timeout -= newtime - prevtime; 106 if (timeout > 0) { 107 prevtime = newtime; 108 } 109 } else { 110 break; 111 } 112 } 113 return result; 114 } 115 116 /* 117 * Class: java_net_SocketInputStream 118 * Method: socketRead0 119 * Signature: (Ljava/io/FileDescriptor;[BIII)I 120 */ 121 JNIEXPORT jint JNICALL 122 Java_java_net_SocketInputStream_socketRead0(JNIEnv *env, jobject this, 123 jobject fdObj, jbyteArray data, 124 jint off, jint len, jint timeout) 125 { 126 char BUF[MAX_BUFFER_LEN]; 127 char *bufP; 128 jint fd, nread; 129 130 if (IS_NULL(fdObj)) { 131 /* shouldn't this be a NullPointerException? -br */ 132 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", 133 "Socket closed"); 134 return -1; 135 } else { 142 return -1; 143 } 144 } 145 146 /* 147 * If the read is greater than our stack allocated buffer then 148 * we allocate from the heap (up to a limit) 149 */ 150 if (len > MAX_BUFFER_LEN) { 151 if (len > MAX_HEAP_BUFFER_LEN) { 152 len = MAX_HEAP_BUFFER_LEN; 153 } 154 bufP = (char *)malloc((size_t)len); 155 if (bufP == NULL) { 156 bufP = BUF; 157 len = MAX_BUFFER_LEN; 158 } 159 } else { 160 bufP = BUF; 161 } 162 if (timeout) { 163 nread = NET_ReadWithTimeout(env, fd, bufP, len, timeout); 164 } else { 165 nread = NET_Read(fd, bufP, len); 166 } 167 if (nread <= 0) { 168 if (nread < 0) { 169 170 switch (errno) { 171 case ECONNRESET: 172 case EPIPE: 173 JNU_ThrowByName(env, "sun/net/ConnectionResetException", 174 "Connection reset"); 175 break; 176 177 case EBADF: 178 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", 179 "Socket closed"); 180 break; 181 182 case EINTR: 183 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException", 184 "Operation interrupted"); 185 break; 186 default: 187 JNU_ThrowByNameWithMessageAndLastError 188 (env, JNU_JAVANETPKG "SocketException", "Read failed"); 189 } 190 } 191 } else { 192 (*env)->SetByteArrayRegion(env, data, off, nread, (jbyte *)bufP); 193 } 194 195 if (bufP != BUF) { 196 free(bufP); 197 } 198 return nread; 199 } |