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
48JNIEXPORT jint JNICALL
49Java_sun_nio_ch_SocketChannelImpl_checkConnect(JNIEnv *env, jobject this,
50                                               jobject fdo, jboolean block,
51                                               jboolean ready)
52{
53    int error = 0;
54    socklen_t n = sizeof(int);
55    jint fd = fdval(env, fdo);
56    int result = 0;
57    struct pollfd poller;
58
59    poller.revents = 1;
60    if (!ready) {
61        poller.fd = fd;
62        poller.events = POLLOUT;
63        poller.revents = 0;
64        result = poll(&poller, 1, block ? -1 : 0);
65        if (result < 0) {
66            JNU_ThrowIOExceptionWithLastError(env, "Poll failed");
67            return IOS_THROWN;
68        }
69        if (!block && (result == 0))
70            return IOS_UNAVAILABLE;
71    }
72
73    if (poller.revents) {
74        errno = 0;
75        result = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &n);
76        if (result < 0) {
77            handleSocketError(env, errno);
78            return JNI_FALSE;
79        } else if (error) {
80            handleSocketError(env, error);
81            return JNI_FALSE;
82        }
83        return 1;
84    }
85    return 0;
86}
87
88JNIEXPORT jint JNICALL
89Java_sun_nio_ch_SocketChannelImpl_sendOutOfBandData(JNIEnv* env, jclass this,
90                                                    jobject fdo, jbyte b)
91{
92    int n = send(fdval(env, fdo), (const void*)&b, 1, MSG_OOB);
93    return convertReturnVal(env, n, JNI_FALSE);
94}
95