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
49 static jfieldID fd_fdID; /* java.io.FileDescriptor.fd */
50 static jclass isa_class; /* java.net.InetSocketAddress */
51 static jmethodID isa_ctorID; /* .InetSocketAddress(InetAddress, int) */
52
53
54 JNIEXPORT void JNICALL
Java_sun_nio_ch_ServerSocketChannelImpl_initIDs(JNIEnv * env,jclass c)55 Java_sun_nio_ch_ServerSocketChannelImpl_initIDs(JNIEnv *env, jclass c)
56 {
57 jclass cls;
58
59 cls = (*env)->FindClass(env, "java/io/FileDescriptor");
60 CHECK_NULL(cls);
61 fd_fdID = (*env)->GetFieldID(env, cls, "fd", "I");
62 CHECK_NULL(fd_fdID);
63
64 cls = (*env)->FindClass(env, "java/net/InetSocketAddress");
65 CHECK_NULL(cls);
66 isa_class = (*env)->NewGlobalRef(env, cls);
67 if (isa_class == NULL) {
68 JNU_ThrowOutOfMemoryError(env, NULL);
69 return;
70 }
71 isa_ctorID = (*env)->GetMethodID(env, cls, "<init>",
72 "(Ljava/net/InetAddress;I)V");
73 CHECK_NULL(isa_ctorID);
74 }
75
76 JNIEXPORT jint JNICALL
Java_sun_nio_ch_ServerSocketChannelImpl_accept0(JNIEnv * env,jobject this,jobject ssfdo,jobject newfdo,jobjectArray isaa)77 Java_sun_nio_ch_ServerSocketChannelImpl_accept0(JNIEnv *env, jobject this,
78 jobject ssfdo, jobject newfdo,
79 jobjectArray isaa)
80 {
81 jint ssfd = (*env)->GetIntField(env, ssfdo, fd_fdID);
82 jint newfd;
83 struct sockaddr *sa;
84 int alloc_len;
85 jobject remote_ia = 0;
86 jobject isa;
87 jint remote_port = 0;
88
89 NET_AllocSockaddr(&sa, &alloc_len);
90 if (sa == NULL) {
91 JNU_ThrowOutOfMemoryError(env, NULL);
92 return IOS_THROWN;
93 }
94
95 /*
96 * accept connection but ignore ECONNABORTED indicating that
97 * a connection was eagerly accepted but was reset before
98 * accept() was called.
99 */
100 for (;;) {
101 socklen_t sa_len = alloc_len;
102 newfd = accept(ssfd, sa, &sa_len);
103 if (newfd >= 0) {
104 break;
105 }
106 if (errno != ECONNABORTED) {
107 break;
108 }
109 /* ECONNABORTED => restart accept */
110 }
111
112 if (newfd < 0) {
113 free((void *)sa);
114 if (errno == EAGAIN)
115 return IOS_UNAVAILABLE;
116 if (errno == EINTR)
117 return IOS_INTERRUPTED;
118 JNU_ThrowIOExceptionWithLastError(env, "Accept failed");
119 return IOS_THROWN;
120 }
121
122 (*env)->SetIntField(env, newfdo, fd_fdID, newfd);
123 remote_ia = NET_SockaddrToInetAddress(env, sa, (int *)&remote_port);
124 free((void *)sa);
125 CHECK_NULL_RETURN(remote_ia, IOS_THROWN);
126 isa = (*env)->NewObject(env, isa_class, isa_ctorID, remote_ia, remote_port);
127 CHECK_NULL_RETURN(isa, IOS_THROWN);
128 (*env)->SetObjectArrayElement(env, isaa, 0, isa);
129 return 1;
130 }
131