1 /*
2 * Copyright (c) 2002, 2018, 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 /*
27 */
28
29 #include <windows.h>
30 #include <winsock2.h>
31 #include <ctype.h>
32 #include "jni.h"
33 #include "jni_util.h"
34 #include "jvm.h"
35 #include "jlong.h"
36 #include "sun_nio_ch_DatagramDispatcher.h"
37
38 #include "nio.h"
39 #include "nio_util.h"
40
41
42 /**************************************************************
43 * DatagramDispatcher.c
44 */
45
46 JNIEXPORT jint JNICALL
Java_sun_nio_ch_DatagramDispatcher_read0(JNIEnv * env,jclass clazz,jobject fdo,jlong address,jint len)47 Java_sun_nio_ch_DatagramDispatcher_read0(JNIEnv *env, jclass clazz, jobject fdo,
48 jlong address, jint len)
49 {
50 /* set up */
51 int i = 0;
52 DWORD read = 0;
53 DWORD flags = 0;
54 jint fd = fdval(env, fdo);
55 WSABUF buf;
56
57 /* destination buffer and size */
58 buf.buf = (char *)address;
59 buf.len = (u_long)len;
60
61 /* read into the buffers */
62 i = WSARecv((SOCKET)fd, /* Socket */
63 &buf, /* pointers to the buffers */
64 (DWORD)1, /* number of buffers to process */
65 &read, /* receives number of bytes read */
66 &flags, /* no flags */
67 0, /* no overlapped sockets */
68 0); /* no completion routine */
69
70 if (i == SOCKET_ERROR) {
71 int theErr = (jint)WSAGetLastError();
72 if (theErr == WSAEWOULDBLOCK) {
73 return IOS_UNAVAILABLE;
74 }
75 if (theErr == WSAECONNRESET) {
76 purgeOutstandingICMP(env, clazz, fd);
77 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
78 return IOS_THROWN;
79 }
80 JNU_ThrowIOExceptionWithLastError(env, "Write failed");
81 return IOS_THROWN;
82 }
83
84 return convertReturnVal(env, (jint)read, JNI_TRUE);
85 }
86
87 JNIEXPORT jlong JNICALL
Java_sun_nio_ch_DatagramDispatcher_readv0(JNIEnv * env,jclass clazz,jobject fdo,jlong address,jint len)88 Java_sun_nio_ch_DatagramDispatcher_readv0(JNIEnv *env, jclass clazz,
89 jobject fdo, jlong address, jint len)
90 {
91 /* set up */
92 int i = 0;
93 DWORD read = 0;
94 DWORD flags = 0;
95 jint fd = fdval(env, fdo);
96 struct iovec *iovp = (struct iovec *)address;
97 WSABUF *bufs = malloc(len * sizeof(WSABUF));
98 if (bufs == NULL) {
99 JNU_ThrowOutOfMemoryError(env, NULL);
100 return IOS_THROWN;
101 }
102
103 /* copy iovec into WSABUF */
104 for(i=0; i<len; i++) {
105 bufs[i].buf = (char *)iovp[i].iov_base;
106 bufs[i].len = (u_long)iovp[i].iov_len;
107 }
108
109 /* read into the buffers */
110 i = WSARecv((SOCKET)fd, /* Socket */
111 bufs, /* pointers to the buffers */
112 (DWORD)len, /* number of buffers to process */
113 &read, /* receives number of bytes read */
114 &flags, /* no flags */
115 0, /* no overlapped sockets */
116 0); /* no completion routine */
117
118 /* clean up */
119 free(bufs);
120
121 if (i != 0) {
122 int theErr = (jint)WSAGetLastError();
123 if (theErr == WSAEWOULDBLOCK) {
124 return IOS_UNAVAILABLE;
125 }
126 if (theErr == WSAECONNRESET) {
127 purgeOutstandingICMP(env, clazz, fd);
128 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
129 return IOS_THROWN;
130 }
131 JNU_ThrowIOExceptionWithLastError(env, "Write failed");
132 return IOS_THROWN;
133 }
134
135 return convertLongReturnVal(env, (jlong)read, JNI_TRUE);
136 }
137
138
139 JNIEXPORT jint JNICALL
Java_sun_nio_ch_DatagramDispatcher_write0(JNIEnv * env,jclass clazz,jobject fdo,jlong address,jint len)140 Java_sun_nio_ch_DatagramDispatcher_write0(JNIEnv *env, jclass clazz,
141 jobject fdo, jlong address, jint len)
142 {
143 /* set up */
144 int i = 0;
145 DWORD written = 0;
146 jint fd = fdval(env, fdo);
147 WSABUF buf;
148
149 /* copy iovec into WSABUF */
150 buf.buf = (char *)address;
151 buf.len = (u_long)len;
152
153 /* read into the buffers */
154 i = WSASend((SOCKET)fd, /* Socket */
155 &buf, /* pointers to the buffers */
156 (DWORD)1, /* number of buffers to process */
157 &written, /* receives number of bytes written */
158 0, /* no flags */
159 0, /* no overlapped sockets */
160 0); /* no completion routine */
161
162 if (i == SOCKET_ERROR) {
163 int theErr = (jint)WSAGetLastError();
164 if (theErr == WSAEWOULDBLOCK) {
165 return IOS_UNAVAILABLE;
166 }
167 if (theErr == WSAECONNRESET) {
168 purgeOutstandingICMP(env, clazz, fd);
169 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
170 return IOS_THROWN;
171 }
172 JNU_ThrowIOExceptionWithLastError(env, "Write failed");
173 return IOS_THROWN;
174 }
175
176 return convertReturnVal(env, (jint)written, JNI_FALSE);
177 }
178
179 JNIEXPORT jlong JNICALL
Java_sun_nio_ch_DatagramDispatcher_writev0(JNIEnv * env,jclass clazz,jobject fdo,jlong address,jint len)180 Java_sun_nio_ch_DatagramDispatcher_writev0(JNIEnv *env, jclass clazz,
181 jobject fdo, jlong address, jint len)
182 {
183 /* set up */
184 int i = 0;
185 DWORD written = 0;
186 jint fd = fdval(env, fdo);
187 struct iovec *iovp = (struct iovec *)address;
188 WSABUF *bufs = malloc(len * sizeof(WSABUF));
189 if (bufs == NULL) {
190 JNU_ThrowOutOfMemoryError(env, NULL);
191 return IOS_THROWN;
192 }
193
194 /* copy iovec into WSABUF */
195 for(i=0; i<len; i++) {
196 bufs[i].buf = (char *)iovp[i].iov_base;
197 bufs[i].len = (u_long)iovp[i].iov_len;
198 }
199
200 /* read into the buffers */
201 i = WSASend((SOCKET)fd, /* Socket */
202 bufs, /* pointers to the buffers */
203 (DWORD)len, /* number of buffers to process */
204 &written, /* receives number of bytes written */
205 0, /* no flags */
206 0, /* no overlapped sockets */
207 0); /* no completion routine */
208
209 /* clean up */
210 free(bufs);
211
212 if (i != 0) {
213 int theErr = (jint)WSAGetLastError();
214 if (theErr == WSAEWOULDBLOCK) {
215 return IOS_UNAVAILABLE;
216 }
217 if (theErr == WSAECONNRESET) {
218 purgeOutstandingICMP(env, clazz, fd);
219 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
220 return IOS_THROWN;
221 }
222 JNU_ThrowIOExceptionWithLastError(env, "Write failed");
223 return IOS_THROWN;
224 }
225
226 return convertLongReturnVal(env, (jlong)written, JNI_FALSE);
227 }
228