1 /*
   2  * Copyright (c) 1997, 2006, 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 #ifdef __linux__
  41 extern int NET_Timeout(int s, long timeout);
  42 extern int NET_Read(int s, void* buf, size_t len);
  43 extern int NET_RecvFrom(int s, void *buf, int len, unsigned int flags,
  44        struct sockaddr *from, int *fromlen);
  45 extern int NET_ReadV(int s, const struct iovec * vector, int count);
  46 extern int NET_Send(int s, void *msg, int len, unsigned int flags);
  47 extern int NET_SendTo(int s, const void *msg, int len,  unsigned  int
  48        flags, const struct sockaddr *to, int tolen);
  49 extern int NET_Writev(int s, const struct iovec * vector, int count);
  50 extern int NET_Connect(int s, struct sockaddr *addr, int addrlen);
  51 extern int NET_Accept(int s, struct sockaddr *addr, int *addrlen);
  52 extern int NET_SocketClose(int s);
  53 extern int NET_Dup2(int oldfd, int newfd);
  54 
  55 #ifdef USE_SELECT
  56 extern int NET_Select(int s, fd_set *readfds, fd_set *writefds,
  57                fd_set *exceptfds, struct timeval *timeout);
  58 #else
  59 extern int NET_Poll(struct pollfd *ufds, unsigned int nfds, int timeout);
  60 #endif
  61 
  62 #else
  63 
  64 #define NET_Timeout     JVM_Timeout
  65 #define NET_Read        JVM_Read
  66 #define NET_RecvFrom    JVM_RecvFrom
  67 #define NET_ReadV       readv
  68 #define NET_Send        JVM_Send
  69 #define NET_SendTo      JVM_SendTo
  70 #define NET_WriteV      writev
  71 #define NET_Connect     JVM_Connect
  72 #define NET_Accept      JVM_Accept
  73 #define NET_SocketClose JVM_SocketClose
  74 #define NET_Dup2        dup2
  75 #define NET_Select      select
  76 #define NET_Poll        poll
  77 
  78 #endif
  79 
  80 #if defined(__linux__) && defined(AF_INET6)
  81 int getDefaultIPv6Interface(struct in6_addr *target_addr);
  82 #endif
  83 
  84 
  85 /* needed from libsocket on Solaris 8 */
  86 
  87 typedef int (*getaddrinfo_f)(const char *nodename, const char *servname,
  88     const struct addrinfo *hints, struct addrinfo **res);
  89 
  90 typedef void (*freeaddrinfo_f)(struct addrinfo *);
  91 
  92 typedef const char * (*gai_strerror_f)(int ecode);
  93 
  94 typedef int (*getnameinfo_f)(const struct sockaddr *, size_t,
  95     char *, size_t, char *, size_t, int);
  96 
  97 extern getaddrinfo_f getaddrinfo_ptr;
  98 extern freeaddrinfo_f freeaddrinfo_ptr;
  99 extern getnameinfo_f getnameinfo_ptr;
 100 
 101 void ThrowUnknownHostExceptionWithGaiError(JNIEnv *env,
 102                                            const char* hostname,
 103                                            int gai_error);
 104 
 105 /* do we have address translation support */
 106 
 107 extern jboolean NET_addrtransAvailable();
 108 
 109 #define NET_WAIT_READ   0x01
 110 #define NET_WAIT_WRITE  0x02
 111 #define NET_WAIT_CONNECT        0x04
 112 
 113 extern jint NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout);
 114 
 115 /************************************************************************
 116  * Macros and constants
 117  */
 118 
 119 /*
 120  * On 64-bit JDKs we use a much larger stack and heap buffer.
 121  */
 122 #ifdef _LP64
 123 #define MAX_BUFFER_LEN 65536
 124 #define MAX_HEAP_BUFFER_LEN 131072
 125 #else
 126 #define MAX_BUFFER_LEN 8192
 127 #define MAX_HEAP_BUFFER_LEN 65536
 128 #endif
 129 
 130 #ifdef AF_INET6
 131 
 132 #define SOCKADDR        union { \
 133                             struct sockaddr_in him4; \
 134                             struct sockaddr_in6 him6; \
 135                         }
 136 
 137 #define SOCKADDR_LEN    (ipv6_available() ? sizeof(SOCKADDR) : \
 138                          sizeof(struct sockaddr_in))
 139 
 140 #else
 141 
 142 #define SOCKADDR        union { struct sockaddr_in him4; }
 143 #define SOCKADDR_LEN    sizeof(SOCKADDR)
 144 
 145 #endif
 146 
 147 /************************************************************************
 148  *  Utilities
 149  */
 150 #ifdef __linux__
 151 extern int kernelIsV22();
 152 extern int kernelIsV24();
 153 #endif
 154 
 155 void NET_ThrowByNameWithLastError(JNIEnv *env, const char *name,
 156                    const char *defaultDetail);
 157 
 158 
 159 #endif /* NET_UTILS_MD_H */