| /* |
| * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| #include <sys/socket.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <unistd.h> |
| |
| #include <jni.h> |
| #include <netinet/tcp.h> |
| #include <netinet/in.h> |
| #include "jni_util.h" |
| #include "jdk_net_LinuxSocketOptions.h" |
| |
| /* |
| * Declare library specific JNI_Onload entry if static build |
| */ |
| DEF_STATIC_JNI_OnLoad |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: setQuickAck |
| * Signature: (II)V |
| */ |
| JNIEXPORT void JNICALL Java_jdk_net_LinuxSocketOptions_setQuickAck0 |
| (JNIEnv *env, jobject unused, jint fd, jboolean on) { |
| int optval; |
| int rv; |
| optval = (on ? 1 : 0); |
| rv = setsockopt(fd, SOL_SOCKET, TCP_QUICKACK, &optval, sizeof (optval)); |
| if (rv < 0) { |
| if (errno == ENOPROTOOPT) { |
| JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
| "unsupported socket option"); |
| } else { |
| JNU_ThrowByNameWithLastError(env, "java/net/SocketException", |
| "set option TCP_QUICKACK failed"); |
| } |
| } |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: getQuickAck |
| * Signature: (I)Z; |
| */ |
| JNIEXPORT jboolean JNICALL Java_jdk_net_LinuxSocketOptions_getQuickAck0 |
| (JNIEnv *env, jobject unused, jint fd) { |
| int on; |
| socklen_t sz = sizeof (on); |
| int rv = getsockopt(fd, SOL_SOCKET, TCP_QUICKACK, &on, &sz); |
| if (rv < 0) { |
| if (errno == ENOPROTOOPT) { |
| JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
| "unsupported socket option"); |
| } else { |
| JNU_ThrowByNameWithLastError(env, "java/net/SocketException", |
| "get option TCP_QUICKACK failed"); |
| } |
| } |
| return on != 0; |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: quickAckSupported |
| * Signature: ()Z |
| */ |
| JNIEXPORT jboolean JNICALL Java_jdk_net_LinuxSocketOptions_quickAckSupported0 |
| (JNIEnv *env, jobject unused) { |
| int one = 1; |
| int rv, s; |
| s = socket(PF_INET, SOCK_STREAM, 0); |
| if (s < 0) { |
| return JNI_FALSE; |
| } |
| rv = setsockopt(s, SOL_SOCKET, TCP_QUICKACK, (void *) &one, sizeof (one)); |
| if (rv != 0 && errno == ENOPROTOOPT) { |
| rv = JNI_FALSE; |
| } else { |
| rv = JNI_TRUE; |
| } |
| close(s); |
| return rv; |
| } |
| |
| static jint socketOptionSupported(jint sockopt) { |
| jint one = 1; |
| jint rv, s; |
| s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); |
| if (s < 0) { |
| return 0; |
| } |
| rv = setsockopt(s, SOL_TCP, sockopt, (void *) &one, sizeof (one)); |
| if (rv != 0 && errno == ENOPROTOOPT) { |
| rv = 0; |
| } else { |
| rv = 1; |
| } |
| close(s); |
| return rv; |
| } |
| |
| static void handleError(JNIEnv *env, jint rv, const char *errmsg) { |
| if (rv < 0) { |
| if (errno == ENOPROTOOPT) { |
| JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", |
| "unsupported socket option"); |
| } else { |
| JNU_ThrowByNameWithLastError(env, "java/net/SocketException", errmsg); |
| } |
| } |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: keepAliveOptionsSupported0 |
| * Signature: ()Z |
| */ |
| JNIEXPORT jboolean JNICALL Java_jdk_net_LinuxSocketOptions_keepAliveOptionsSupported0 |
| (JNIEnv *env, jobject unused) { |
| return socketOptionSupported(TCP_KEEPIDLE) && socketOptionSupported(TCP_KEEPCNT) |
| && socketOptionSupported(TCP_KEEPINTVL); |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: setTcpkeepAliveProbes0 |
| * Signature: (II)V |
| */ |
| JNIEXPORT void JNICALL Java_jdk_net_LinuxSocketOptions_setTcpkeepAliveProbes0 |
| (JNIEnv *env, jobject unused, jint fd, jint optval) { |
| jint rv = setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &optval, sizeof (optval)); |
| handleError(env, rv, "set option TCP_KEEPCNT failed"); |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: setTcpKeepAliveTime0 |
| * Signature: (II)V |
| */ |
| JNIEXPORT void JNICALL Java_jdk_net_LinuxSocketOptions_setTcpKeepAliveTime0 |
| (JNIEnv *env, jobject unused, jint fd, jint optval) { |
| jint rv = setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &optval, sizeof (optval)); |
| handleError(env, rv, "set option TCP_KEEPIDLE failed"); |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: setTcpKeepAliveIntvl0 |
| * Signature: (II)V |
| */ |
| JNIEXPORT void JNICALL Java_jdk_net_LinuxSocketOptions_setTcpKeepAliveIntvl0 |
| (JNIEnv *env, jobject unused, jint fd, jint optval) { |
| jint rv = setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &optval, sizeof (optval)); |
| handleError(env, rv, "set option TCP_KEEPINTVL failed"); |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: getTcpkeepAliveProbes0 |
| * Signature: (I)I; |
| */ |
| JNIEXPORT jint JNICALL Java_jdk_net_LinuxSocketOptions_getTcpkeepAliveProbes0 |
| (JNIEnv *env, jobject unused, jint fd) { |
| jint optval, rv; |
| socklen_t sz = sizeof (optval); |
| rv = getsockopt(fd, SOL_TCP, TCP_KEEPCNT, &optval, &sz); |
| handleError(env, rv, "get option TCP_KEEPCNT failed"); |
| return optval; |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: getTcpKeepAliveTime0 |
| * Signature: (I)I; |
| */ |
| JNIEXPORT jint JNICALL Java_jdk_net_LinuxSocketOptions_getTcpKeepAliveTime0 |
| (JNIEnv *env, jobject unused, jint fd) { |
| jint optval, rv; |
| socklen_t sz = sizeof (optval); |
| rv = getsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &optval, &sz); |
| handleError(env, rv, "get option TCP_KEEPIDLE failed"); |
| return optval; |
| } |
| |
| /* |
| * Class: jdk_net_LinuxSocketOptions |
| * Method: getTcpKeepAliveIntvl0 |
| * Signature: (I)I; |
| */ |
| JNIEXPORT jint JNICALL Java_jdk_net_LinuxSocketOptions_getTcpKeepAliveIntvl0 |
| (JNIEnv *env, jobject unused, jint fd) { |
| jint optval, rv; |
| socklen_t sz = sizeof (optval); |
| rv = getsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &optval, &sz); |
| handleError(env, rv, "get option TCP_KEEPINTVL failed"); |
| return optval; |
| } |