1 /*
2 * Copyright (c) 2000, 2008, 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 <stdlib.h>
27 #include <netdb.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
30
31 #if __linux__
32 #include <netinet/in.h>
33 #endif
34
35 #if defined(__solaris__) && !defined(_SOCKLEN_T)
36 typedef size_t socklen_t; /* New in SunOS 5.7, so need this for 5.6 */
37 #endif
38
39 #include "jni.h"
40 #include "jni_util.h"
41 #include "net_util.h"
42 #include "jvm.h"
43 #include "jlong.h"
44 #include "sun_nio_ch_ServerSocketChannelImpl.h"
45 #include "nio.h"
46 #include "nio_util.h"
47
48 #include <nativehelper/JNIHelp.h>
49
50
51 #define NATIVE_METHOD(className, functionName, signature) \
52 { #functionName, signature, (void*)(className ## _ ## functionName) }
53
54
55 static jfieldID fd_fdID; /* java.io.FileDescriptor.fd */
56 static jclass isa_class; /* java.net.InetSocketAddress */
57 static jmethodID isa_ctorID; /* .InetSocketAddress(InetAddress, int) */
58
59
60 JNIEXPORT void JNICALL
Java_sun_nio_ch_ServerSocketChannelImpl_initIDs(JNIEnv * env,jclass c)61 Java_sun_nio_ch_ServerSocketChannelImpl_initIDs(JNIEnv *env, jclass c)
62 {
63 jclass cls;
64
65 cls = (*env)->FindClass(env, "java/io/FileDescriptor");
66 CHECK_NULL(cls);
67 fd_fdID = (*env)->GetFieldID(env, cls, "descriptor", "I");
68 CHECK_NULL(fd_fdID);
69
70 cls = (*env)->FindClass(env, "java/net/InetSocketAddress");
71 CHECK_NULL(cls);
72 isa_class = (*env)->NewGlobalRef(env, cls);
73 if (isa_class == NULL) {
74 JNU_ThrowOutOfMemoryError(env, NULL);
75 return;
76 }
77 isa_ctorID = (*env)->GetMethodID(env, cls, "<init>",
78 "(Ljava/net/InetAddress;I)V");
79 CHECK_NULL(isa_ctorID);
80 }
81
82 JNIEXPORT jint JNICALL
Java_sun_nio_ch_ServerSocketChannelImpl_accept0(JNIEnv * env,jobject this,jobject ssfdo,jobject newfdo,jobjectArray isaa)83 Java_sun_nio_ch_ServerSocketChannelImpl_accept0(JNIEnv *env, jobject this,
84 jobject ssfdo, jobject newfdo,
85 jobjectArray isaa)
86 {
87 jint ssfd = (*env)->GetIntField(env, ssfdo, fd_fdID);
88 jint newfd;
89 struct sockaddr *sa;
90 int alloc_len;
91 jobject remote_ia = 0;
92 jobject isa;
93 jint remote_port;
94
95 NET_AllocSockaddr(&sa, &alloc_len);
96 if (sa == NULL) {
97 JNU_ThrowOutOfMemoryError(env, NULL);
98 return IOS_THROWN;
99 }
100
101 /*
102 * accept connection but ignore ECONNABORTED indicating that
103 * a connection was eagerly accepted but was reset before
104 * accept() was called.
105 */
106 for (;;) {
107 socklen_t sa_len = alloc_len;
108 newfd = accept(ssfd, sa, &sa_len);
109 if (newfd >= 0) {
110 break;
111 }
112 if (errno != ECONNABORTED) {
113 break;
114 }
115 /* ECONNABORTED => restart accept */
116 }
117
118 if (newfd < 0) {
119 free((void *)sa);
120 if (errno == EAGAIN)
121 return IOS_UNAVAILABLE;
122 if (errno == EINTR)
123 return IOS_INTERRUPTED;
124 JNU_ThrowIOExceptionWithLastError(env, "Accept failed");
125 return IOS_THROWN;
126 }
127
128 (*env)->SetIntField(env, newfdo, fd_fdID, newfd);
129 remote_ia = NET_SockaddrToInetAddress(env, sa, (int *)&remote_port);
130 free((void *)sa);
131 CHECK_NULL_RETURN(remote_ia, IOS_THROWN);
132 isa = (*env)->NewObject(env, isa_class, isa_ctorID, remote_ia, remote_port);
133 CHECK_NULL_RETURN(isa, IOS_THROWN);
134 (*env)->SetObjectArrayElement(env, isaa, 0, isa);
135 return 1;
136 }
137
138
139
140 static JNINativeMethod gMethods[] = {
141 NATIVE_METHOD(Java_sun_nio_ch_ServerSocketChannelImpl, initIDs, "()V"),
142 NATIVE_METHOD(Java_sun_nio_ch_ServerSocketChannelImpl, accept0,
143 "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;[Ljava/net/InetSocketAddress;)I"),
144 };
145
register_sun_nio_ch_ServerSocketChannelImpl(JNIEnv * env)146 void register_sun_nio_ch_ServerSocketChannelImpl(JNIEnv* env) {
147 jniRegisterNativeMethods(env, "sun/nio/ch/ServerSocketChannelImpl", gMethods, NELEM(gMethods));
148 }
149