1 /*
2  * Copyright (c) 1997, 2020, 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 #ifndef NET_UTILS_MD_H
27 #define NET_UTILS_MD_H
28 
29 #include <netdb.h>
30 #include <poll.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 
34 /************************************************************************
35  * Macros and constants
36  */
37 
38 #define NET_NSEC_PER_MSEC 1000000
39 #define NET_NSEC_PER_SEC  1000000000
40 #define NET_NSEC_PER_USEC 1000
41 
42 /* in case NI_MAXHOST is not defined in netdb.h */
43 #ifndef NI_MAXHOST
44 #define NI_MAXHOST 1025
45 #endif
46 
47 /* Defines SO_REUSEPORT */
48 #ifndef SO_REUSEPORT
49 #ifdef __linux__
50 #define SO_REUSEPORT 15
51 #elif defined(AIX) || defined(MACOSX)
52 #define SO_REUSEPORT 0x0200
53 #else
54 #define SO_REUSEPORT 0
55 #endif
56 #endif
57 
58 /*
59  * On 64-bit JDKs we use a much larger stack and heap buffer.
60  */
61 #ifdef _LP64
62 #define MAX_BUFFER_LEN 65536
63 #define MAX_HEAP_BUFFER_LEN 131072
64 #else
65 #define MAX_BUFFER_LEN 8192
66 #define MAX_HEAP_BUFFER_LEN 65536
67 #endif
68 
69 typedef union {
70     struct sockaddr     sa;
71     struct sockaddr_in  sa4;
72     struct sockaddr_in6 sa6;
73 } SOCKETADDRESS;
74 
75 /************************************************************************
76  * Functions
77  */
78 
79 int NET_Timeout(JNIEnv *env, int s, long timeout, jlong  nanoTimeStamp);
80 int NET_Read(int s, void* buf, size_t len);
81 int NET_NonBlockingRead(int s, void* buf, size_t len);
82 int NET_RecvFrom(int s, void *buf, int len, unsigned int flags,
83                  struct sockaddr *from, socklen_t *fromlen);
84 int NET_Send(int s, void *msg, int len, unsigned int flags);
85 int NET_SendTo(int s, const void *msg, int len,  unsigned  int
86                flags, const struct sockaddr *to, int tolen);
87 int NET_Connect(int s, struct sockaddr *addr, int addrlen);
88 int NET_Accept(int s, struct sockaddr *addr, socklen_t *addrlen);
89 int NET_SocketClose(int s);
90 int NET_Dup2(int oldfd, int newfd);
91 int NET_Poll(struct pollfd *ufds, unsigned int nfds, int timeout);
92 
93 void NET_ThrowUnknownHostExceptionWithGaiError(JNIEnv *env,
94                                                const char* hostname,
95                                                int gai_error);
96 void NET_ThrowByNameWithLastError(JNIEnv *env, const char *name,
97                                   const char *defaultDetail);
98 void NET_SetTrafficClass(SOCKETADDRESS *sa, int trafficClass);
99 
100 #endif /* NET_UTILS_MD_H */
101