1/*
2 * Copyright (c) 2009, 2016, 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 <sys/types.h>
27#include <sys/socket.h>
28#include <errno.h>
29
30#if defined(__solaris__)
31 #if !defined(PROTO_SDP)
32 #define PROTO_SDP 257
33 #endif
34#elif defined(__linux__)
35 #if !defined(AF_INET_SDP)
36 #define AF_INET_SDP 27
37 #endif
38#endif
39
40#include "jni.h"
41#include "jni_util.h"
42#include "net_util.h"
43
44#define RESTARTABLE(_cmd, _result) do { \
45 do { \
46 _result = _cmd; \
47 } while((_result == -1) && (errno == EINTR)); \
48} while(0)
49
50
51/**
52 * Creates a SDP socket.
53 */
54static int create(JNIEnv* env)
55{
56 int s;
57
58#if defined(__solaris__)
59 int domain = ipv6_available() ? AF_INET6 : AF_INET;
60 s = socket(domain, SOCK_STREAM, PROTO_SDP);
61#elif defined(__linux__)
62 /**
63 * IPv6 not supported by SDP on Linux
64 */
65 if (ipv6_available()) {
66 JNU_ThrowIOException(env, "IPv6 not supported");
67 return -1;
68 }
69 s = socket(AF_INET_SDP, SOCK_STREAM, 0);
70#else
71 /* not supported on other platforms at this time */
72 s = -1;
73 errno = EPROTONOSUPPORT;
74#endif
75
76 if (s < 0)
77 JNU_ThrowIOExceptionWithLastError(env, "socket");
78 return s;
79}
80
81/**
82 * Creates a SDP socket, returning file descriptor referencing the socket.
83 */
84JNIEXPORT jint JNICALL
85Java_sun_net_sdp_SdpSupport_create0(JNIEnv *env, jclass cls)
86{
87 return create(env);
88}
89
90/**
91 * Converts an existing file descriptor, that references an unbound TCP socket,
92 * to SDP.
93 */
94JNIEXPORT void JNICALL
95Java_sun_net_sdp_SdpSupport_convert0(JNIEnv *env, jclass cls, int fd)
96{
97 int s = create(env);
98 if (s >= 0) {
99 socklen_t len;
100 int arg, res;
101 struct linger linger;
102
103 /* copy socket options that are relevant to SDP */
104 len = sizeof(arg);
105 if (getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg, &len) == 0)
106 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&arg, len);
107#ifdef SO_REUSEPORT
108 len = sizeof(arg);
109 if (getsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (char*)&arg, &len) == 0)
110 setsockopt(s, SOL_SOCKET, SO_REUSEPORT, (char*)&arg, len);
111#endif
112 len = sizeof(arg);
113 if (getsockopt(fd, SOL_SOCKET, SO_OOBINLINE, (char*)&arg, &len) == 0)
114 setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (char*)&arg, len);
115 len = sizeof(linger);
116 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, (void*)&linger, &len) == 0)
117 setsockopt(s, SOL_SOCKET, SO_LINGER, (char*)&linger, len);
118
119 RESTARTABLE(dup2(s, fd), res);
120 if (res < 0)
121 JNU_ThrowIOExceptionWithLastError(env, "dup2");
122 res = close(s);
123 if (res < 0 && !(*env)->ExceptionOccurred(env))
124 JNU_ThrowIOExceptionWithLastError(env, "close");
125 }
126}
127