SocketChannelImpl.c revision cab01ac294bb8ded259851673baa4c6ca226f828 
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 "nio_util.h"
44#include "nio.h"
45
46#include <nativehelper/JNIHelp.h>
47
48#define NATIVE_METHOD(className, functionName, signature) \
49{ #functionName, signature, (void*)(Java_sun_nio_ch_ ## className ## _ ## functionName) }
50
51JNIEXPORT jint JNICALL
52Java_sun_nio_ch_SocketChannelImpl_checkConnect(JNIEnv *env, jobject this,
53                                               jobject fdo, jboolean block,
54                                               jboolean ready)
55{
56    int error = 0;
57    socklen_t n = sizeof(int);
58    jint fd = fdval(env, fdo);
59    int result = 0;
60    struct pollfd poller;
61
62    poller.revents = 1;
63    if (!ready) {
64        poller.fd = fd;
65        poller.events = POLLOUT;
66        poller.revents = 0;
67        result = poll(&poller, 1, block ? -1 : 0);
68        if (result < 0) {
69            JNU_ThrowIOExceptionWithLastError(env, "Poll failed");
70            return IOS_THROWN;
71        }
72        if (!block && (result == 0))
73            return IOS_UNAVAILABLE;
74    }
75
76    if (poller.revents) {
77        errno = 0;
78        result = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &n);
79        if (result < 0) {
80            handleSocketError(env, errno);
81            return JNI_FALSE;
82        } else if (error) {
83            handleSocketError(env, error);
84            return JNI_FALSE;
85        }
86        return 1;
87    }
88    return 0;
89}
90
91JNIEXPORT jint JNICALL
92Java_sun_nio_ch_SocketChannelImpl_sendOutOfBandData(JNIEnv* env, jclass this,
93                                                    jobject fdo, jbyte b)
94{
95    int n = send(fdval(env, fdo), (const void*)&b, 1, MSG_OOB);
96    return convertReturnVal(env, n, JNI_FALSE);
97}
98
99static JNINativeMethod gMethods[] = {
100  NATIVE_METHOD(SocketChannelImpl, checkConnect, "(Ljava/io/FileDescriptor;ZZ)I"),
101  NATIVE_METHOD(SocketChannelImpl, sendOutOfBandData, "(Ljava/io/FileDescriptor;B)I"),
102};
103
104void register_sun_nio_ch_SocketChannelImpl(JNIEnv* env) {
105  jniRegisterNativeMethods(env, "sun/nio/ch/SocketChannelImpl", gMethods, NELEM(gMethods));
106}
107