1 /*
2 * Copyright (c) 1997, 2012, 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 <sys/socket.h>
30 #include <sys/types.h>
31 #include <netdb.h>
32 #include <netinet/in.h>
33 #include <unistd.h>
34
35 #ifndef USE_SELECT
36 #include <sys/poll.h>
37 #endif
38
39
40 /*
41 AIX needs a workaround for I/O cancellation, see:
42 http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/close.htm
43 ...
44 The close subroutine is blocked until all subroutines which use the file
45 descriptor return to usr space. For example, when a thread is calling close
46 and another thread is calling select with the same file descriptor, the
47 close subroutine does not return until the select call returns.
48 ...
49 */
50 #if defined(__linux__) || defined(MACOSX) || defined (_AIX)
51 extern int NET_Timeout(int s, long timeout);
52 extern int NET_Read(int s, void* buf, size_t len);
53 extern int NET_RecvFrom(int s, void *buf, int len, unsigned int flags,
54 struct sockaddr *from, int *fromlen);
55 extern int NET_ReadV(int s, const struct iovec * vector, int count);
56 extern int NET_Send(int s, void *msg, int len, unsigned int flags);
57 extern int NET_SendTo(int s, const void *msg, int len, unsigned int
58 flags, const struct sockaddr *to, int tolen);
59 extern int NET_Writev(int s, const struct iovec * vector, int count);
60 extern int NET_Connect(int s, struct sockaddr *addr, int addrlen);
61 extern int NET_Accept(int s, struct sockaddr *addr, int *addrlen);
62 extern int NET_SocketClose(int s);
63 extern int NET_Dup2(int oldfd, int newfd);
64
65 #ifdef USE_SELECT
66 extern int NET_Select(int s, fd_set *readfds, fd_set *writefds,
67 fd_set *exceptfds, struct timeval *timeout);
68 #else
69 extern int NET_Poll(struct pollfd *ufds, unsigned int nfds, int timeout);
70 #endif
71
72 #else
73
74 #define NET_Timeout JVM_Timeout
75 #define NET_Read JVM_Read
76 #define NET_RecvFrom JVM_RecvFrom
77 #define NET_ReadV readv
78 #define NET_Send JVM_Send
79 #define NET_SendTo JVM_SendTo
80 #define NET_WriteV writev
81 #define NET_Connect JVM_Connect
82 #define NET_Accept JVM_Accept
83 #define NET_SocketClose JVM_SocketClose
84 #define NET_Dup2 dup2
85 #define NET_Select select
86 #define NET_Poll poll
87
88 #endif
89
90 #if defined(__linux__) && defined(AF_INET6)
91 int getDefaultIPv6Interface(struct in6_addr *target_addr);
92 #endif
93
94
95 /* needed from libsocket on Solaris 8 */
96
97 typedef int (*getaddrinfo_f)(const char *nodename, const char *servname,
98 const struct addrinfo *hints, struct addrinfo **res);
99
100 typedef void (*freeaddrinfo_f)(struct addrinfo *);
101
102 typedef const char * (*gai_strerror_f)(int ecode);
103
104 typedef int (*getnameinfo_f)(const struct sockaddr *, size_t,
105 char *, size_t, char *, size_t, int);
106
107 extern getaddrinfo_f getaddrinfo_ptr;
108 extern freeaddrinfo_f freeaddrinfo_ptr;
109 extern getnameinfo_f getnameinfo_ptr;
110
111 void ThrowUnknownHostExceptionWithGaiError(JNIEnv *env,
112 const char* hostname,
113 int gai_error);
114
115 #define NET_WAIT_READ 0x01
116 #define NET_WAIT_WRITE 0x02
117 #define NET_WAIT_CONNECT 0x04
118
119 extern jint NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout);
120
121 /************************************************************************
122 * Macros and constants
123 */
124
125 /*
126 * On 64-bit JDKs we use a much larger stack and heap buffer.
127 */
128 #ifdef _LP64
129 #define MAX_BUFFER_LEN 65536
130 #define MAX_HEAP_BUFFER_LEN 131072
131 #else
132 #define MAX_BUFFER_LEN 8192
133 #define MAX_HEAP_BUFFER_LEN 65536
134 #endif
135
136 #ifdef AF_INET6
137
138 #define SOCKADDR union { \
139 struct sockaddr_in him4; \
140 struct sockaddr_in6 him6; \
141 }
142
143 #define SOCKADDR_LEN (ipv6_available() ? sizeof(SOCKADDR) : \
144 sizeof(struct sockaddr_in))
145
146 #else
147
148 #define SOCKADDR union { struct sockaddr_in him4; }
149 #define SOCKADDR_LEN sizeof(SOCKADDR)
150
151 #endif
152
153 /************************************************************************
154 * Utilities
155 */
156 #ifdef __linux__
157 extern int kernelIsV24();
158 #endif
159
160 void NET_ThrowByNameWithLastError(JNIEnv *env, const char *name,
161 const char *defaultDetail);
162
163
164 #endif /* NET_UTILS_MD_H */