1 /*
2 * Copyright (c) 2001, 2019, 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 <windows.h>
27 #include <winsock2.h>
28
29 #include "jni.h"
30 #include "jni_util.h"
31 #include "jvm.h"
32 #include "jlong.h"
33 #include "nio.h"
34 #include "nio_util.h"
35 #include "net_util.h"
36
37 #include "java_net_InetAddress.h"
38 #include "sun_nio_ch_Net.h"
39 #include "sun_nio_ch_PollArrayWrapper.h"
40
41 JNIEXPORT jobject JNICALL
42 NET_SockaddrToUnixAddressString(JNIEnv *env, struct sockaddr_un *sa, socklen_t len) {
43
44 if (sa->sun_family == AF_UNIX) {
45 return JNU_NewStringPlatform(env, sa->sun_path);
46 }
47 return NULL;
48 }
49
50 JNIEXPORT jint JNICALL
51 NET_UnixSocketAddressToSockaddr(JNIEnv *env, jbyteArray addr, struct sockaddr_un *sa, int *len)
52 {
53 memset(sa, 0, sizeof(struct sockaddr_un));
54 sa->sun_family = AF_UNIX;
55 if (addr == 0L) {
56 /* Do explicit bind on Windows */
57 *len = (int)(offsetof(struct sockaddr_un, sun_path));
58 return 0;
59 }
60 int ret;
61 jboolean isCopy;
62 char *pname = (*env)->GetByteArrayElements(env, addr, &isCopy);
63
64 size_t name_len = (size_t)(*env)->GetArrayLength(env, addr);
65 if (name_len > MAX_UNIX_DOMAIN_PATH_LEN) {
66 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Unix domain path too long");
67 ret=1;
68 goto finish;
69 }
70 strncpy(sa->sun_path, pname, name_len);
71 *len = (int)(offsetof(struct sockaddr_un, sun_path) + name_len);
72 ret = 0;
73 finish:
74 (*env)->ReleaseByteArrayElements(env, addr, pname, JNI_ABORT);
75 return ret;
76 }
77
78
79 JNIEXPORT jboolean JNICALL
80 Java_sun_nio_ch_UnixDomainNet_socketSupported(JNIEnv *env, jclass cl)
81 {
82 SOCKET fd = socket(PF_UNIX, SOCK_STREAM, 0);
83 if (fd == INVALID_SOCKET) {
84 return JNI_FALSE;
85 }
86 closesocket(fd);
87 return JNI_TRUE;
88 }
89
90 JNIEXPORT jint JNICALL
91 Java_sun_nio_ch_UnixDomainNet_maxNameLen0(JNIEnv *env, jclass cl)
92 {
93 return MAX_UNIX_DOMAIN_PATH_LEN - 1;
94 }
95
96 JNIEXPORT jint JNICALL
97 Java_sun_nio_ch_UnixDomainNet_socket0(JNIEnv *env, jclass cl)
98 {
99 SOCKET fd = socket(PF_UNIX, SOCK_STREAM, 0);
100 if (fd == INVALID_SOCKET) {
101 return handleSocketError(env, WSAGetLastError());
102 }
103 return (int)fd;
104 }
105
106 /**
107 * Windows does not support auto bind. So, the windows version of NET_UnixSocketAddressToSockaddr
108 * looks out for a null 'uaddr' and handles it specially
109 */
110 JNIEXPORT void JNICALL
111 Java_sun_nio_ch_UnixDomainNet_bind0(JNIEnv *env, jclass clazz, jobject fdo, jbyteArray addr)
112 {
113 struct sockaddr_un sa;
114 int sa_len = 0;
115 int rv = 0;
116
117 if (NET_UnixSocketAddressToSockaddr(env, addr, &sa, &sa_len) != 0)
118 return;
119
120 int fd = fdval(env, fdo);
121
122 rv = bind(fdval(env, fdo), (struct sockaddr *)&sa, sa_len);
123 if (rv != 0) {
124 int err = WSAGetLastError();
125 NET_ThrowNew(env, err, "bind");
126 }
127 }
128
129 JNIEXPORT jint JNICALL
130 Java_sun_nio_ch_UnixDomainNet_connect0(JNIEnv *env, jclass clazz, jobject fdo, jbyteArray addr)
131 {
132 struct sockaddr_un sa;
133 int sa_len = 0;
134 int rv;
135
136 if (NET_UnixSocketAddressToSockaddr(env, addr, &sa, &sa_len) != 0) {
137 return IOS_THROWN;
138 }
139
140 rv = connect(fdval(env, fdo), (const struct sockaddr *)&sa, sa_len);
141 if (rv != 0) {
142 int err = WSAGetLastError();
143 if (err == WSAEINPROGRESS || err == WSAEWOULDBLOCK) {
144 return IOS_UNAVAILABLE;
145 }
146 NET_ThrowNew(env, err, "connect");
147 return IOS_THROWN;
148 }
149 return 1;
150 }
151
152 JNIEXPORT jint JNICALL
153 Java_sun_nio_ch_UnixDomainNet_accept(JNIEnv *env, jclass clazz, jobject fdo, jobject newfdo,
154 jobjectArray usaa)
155 {
156 jint fd = fdval(env, fdo);
157 jint newfd;
158 struct sockaddr_un sa;
159 socklen_t sa_len = sizeof(sa);
160 jobject usa;
161
162 memset((char *)&sa, 0, sizeof(sa));
163 newfd = (jint) accept(fd, (struct sockaddr *)&sa, &sa_len);
164 if (newfd == INVALID_SOCKET) {
165 int theErr = (jint)WSAGetLastError();
166 if (theErr == WSAEWOULDBLOCK) {
167 return IOS_UNAVAILABLE;
168 }
169 JNU_ThrowIOExceptionWithLastError(env, "Accept failed");
170 return IOS_THROWN;
171 }
172
173 SetHandleInformation((HANDLE)(UINT_PTR)newfd, HANDLE_FLAG_INHERIT, 0);
174 setfdval(env, newfdo, newfd);
175
176 usa = NET_SockaddrToUnixAddressString(env, &sa, sa_len);
177 CHECK_NULL_RETURN(usa, IOS_THROWN);
178
179 (*env)->SetObjectArrayElement(env, usaa, 0, usa);
180
181 return 1;
182 }
183
184 /* only used here so as not to make SOCKETADDRESS too large
185 * and some buggy usages elsewhere
186 */
187 typedef union {
188 struct sockaddr sa;
189 struct sockaddr_in sa4;
190 struct sockaddr_in6 sa6;
191 struct sockaddr_un saun;
192 } sockaddrall;
193
194 JNIEXPORT jobject JNICALL
195 Java_sun_nio_ch_UnixDomainNet_localAddress(JNIEnv *env, jclass clazz, jobject fdo)
196 {
197 sockaddrall sa;
198 int sa_len = sizeof(sa);
199
200 if (getsockname(fdval(env, fdo), &sa.sa, &sa_len) == SOCKET_ERROR) {
201 NET_ThrowNew(env, WSAGetLastError(), "getsockname");
202 return NULL;
203 }
204 return NET_SockaddrToUnixAddressString(env, &sa.saun, sa_len);
205 }
206
207 JNIEXPORT jobject JNICALL
208 Java_sun_nio_ch_UnixDomainNet_remoteAddress(JNIEnv *env, jclass clazz, jobject fdo)
209 {
210 sockaddrall sa;
211 int sa_len = sizeof(sa);
212
213 if (getpeername(fdval(env, fdo), &sa.sa, &sa_len) == SOCKET_ERROR) {
214 NET_ThrowNew(env, WSAGetLastError(), "getsockname");
215 return NULL;
216 }
217 return NET_SockaddrToUnixAddressString(env, &sa.saun, sa_len);
218 }