SocketChannelImpl.c revision ac740d8c4dd4c7c17ae9d32d0989c48b93697c88 
1/*
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
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 <netdb.h>
27#include <sys/types.h>
28#include <sys/socket.h>
29#include <stdlib.h>
30#include <errno.h>
31#include <string.h>
32#include <poll.h>
33
34#if __linux__
35#include <netinet/in.h>
36#endif
37
38#include "jni.h"
39#include "jni_util.h"
40#include "net_util.h"
41#include "jvm.h"
42#include "jlong.h"
43#include "sun_nio_ch_SocketChannelImpl.h"
44#include "nio_util.h"
45#include "nio.h"
46
47#include "JNIHelp.h"
48
49#define NATIVE_METHOD(className, functionName, signature) \
50{ #functionName, signature, (void*)(Java_sun_nio_ch_ ## className ## _ ## functionName) }
51
52JNIEXPORT jint JNICALL
53Java_sun_nio_ch_SocketChannelImpl_checkConnect(JNIEnv *env, jobject this,
54                                               jobject fdo, jboolean block,
55                                               jboolean ready)
56{
57    int error = 0;
58    socklen_t n = sizeof(int);
59    jint fd = fdval(env, fdo);
60    int result = 0;
61    struct pollfd poller;
62
63    poller.revents = 1;
64    if (!ready) {
65        poller.fd = fd;
66        poller.events = POLLOUT;
67        poller.revents = 0;
68        result = poll(&poller, 1, block ? -1 : 0);
69        if (result < 0) {
70            JNU_ThrowIOExceptionWithLastError(env, "Poll failed");
71            return IOS_THROWN;
72        }
73        if (!block && (result == 0))
74            return IOS_UNAVAILABLE;
75    }
76
77    if (poller.revents) {
78        errno = 0;
79        result = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &n);
80        if (result < 0) {
81            handleSocketError(env, errno);
82            return JNI_FALSE;
83        } else if (error) {
84            handleSocketError(env, error);
85            return JNI_FALSE;
86        }
87        return 1;
88    }
89    return 0;
90}
91
92JNIEXPORT jint JNICALL
93Java_sun_nio_ch_SocketChannelImpl_sendOutOfBandData(JNIEnv* env, jclass this,
94                                                    jobject fdo, jbyte b)
95{
96    int n = send(fdval(env, fdo), (const void*)&b, 1, MSG_OOB);
97    return convertReturnVal(env, n, JNI_FALSE);
98}
99
100static JNINativeMethod gMethods[] = {
101  NATIVE_METHOD(SocketChannelImpl, checkConnect, "(Ljava/io/FileDescriptor;ZZ)I"),
102  NATIVE_METHOD(SocketChannelImpl, sendOutOfBandData, "(Ljava/io/FileDescriptor;B)I"),
103};
104
105void register_sun_nio_ch_SocketChannelImpl(JNIEnv* env) {
106  jniRegisterNativeMethods(env, SUN_NIO_CH(SocketChannelImpl), gMethods, NELEM(gMethods));
107}
108