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 */ 54 static 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 */ 84 JNIEXPORT jint JNICALL 85 Java_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 */ 94 JNIEXPORT void JNICALL 95 Java_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 }