1 /*
   2  * Copyright (c) 2003, 2017, 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 <stdlib.h>
  27 #include <sys/types.h>
  28 #include <sys/socket.h>
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31 
  32 #include "jni.h"
  33 
  34 #include "jni.h"
  35 #include "jni_util.h"
  36 #include "net_util.h"
  37 
  38 #include "sun_nio_ch_InheritedChannel.h"
  39 
  40 static int matchFamily(SOCKETADDRESS *sa) {
  41     return (sa->sa.sa_family == (ipv6_available() ? AF_INET6 : AF_INET));
  42 }
  43 
  44 JNIEXPORT void JNICALL
  45 Java_sun_nio_ch_InheritedChannel_initIDs(JNIEnv *env, jclass cla)
  46 {
  47     /* Initialize InetAddress IDs before later use of NET_XXX functions */
  48     initInetAddressIDs(env);
  49 }
  50 
  51 JNIEXPORT jobject JNICALL
  52 Java_sun_nio_ch_InheritedChannel_peerAddress0(JNIEnv *env, jclass cla, jint fd)
  53 {
  54     SOCKETADDRESS sa;
  55     socklen_t len = sizeof(SOCKETADDRESS);
  56     jobject remote_ia = NULL;
  57     jint remote_port;
  58 
  59     if (getpeername(fd, &sa.sa, &len) == 0) {
  60         if (matchFamily(&sa)) {
  61             remote_ia = NET_SockaddrToInetAddress(env, &sa, (int *)&remote_port);
  62         }
  63     }
  64 
  65     return remote_ia;
  66 }
  67 
  68 JNIEXPORT jint JNICALL
  69 Java_sun_nio_ch_InheritedChannel_peerPort0(JNIEnv *env, jclass cla, jint fd)
  70 {
  71     SOCKETADDRESS sa;
  72     socklen_t len = sizeof(SOCKETADDRESS);
  73     jint remote_port = -1;
  74 
  75     if (getpeername(fd, &sa.sa, &len) == 0) {
  76         if (matchFamily(&sa)) {
  77             NET_SockaddrToInetAddress(env, &sa, (int *)&remote_port);
  78         }
  79     }
  80 
  81     return remote_port;
  82 }
  83 
  84 JNIEXPORT jint JNICALL
  85 Java_sun_nio_ch_InheritedChannel_soType0(JNIEnv *env, jclass cla, jint fd)
  86 {
  87     int sotype;
  88     socklen_t arglen = sizeof(sotype);
  89     if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *)&sotype, &arglen) == 0) {
  90         if (sotype == SOCK_STREAM)
  91             return sun_nio_ch_InheritedChannel_SOCK_STREAM;
  92         if (sotype == SOCK_DGRAM)
  93             return sun_nio_ch_InheritedChannel_SOCK_DGRAM;
  94     }
  95     return sun_nio_ch_InheritedChannel_UNKNOWN;
  96 }
  97 
  98 JNIEXPORT jint JNICALL
  99 Java_sun_nio_ch_InheritedChannel_dup(JNIEnv *env, jclass cla, jint fd)
 100 {
 101    int newfd = dup(fd);
 102    if (newfd < 0) {
 103         JNU_ThrowIOExceptionWithLastError(env, "dup failed");
 104    }
 105    return (jint)newfd;
 106 }
 107 
 108 JNIEXPORT void JNICALL
 109 Java_sun_nio_ch_InheritedChannel_dup2(JNIEnv *env, jclass cla, jint fd, jint fd2)
 110 {
 111    if (dup2(fd, fd2) < 0) {
 112         JNU_ThrowIOExceptionWithLastError(env, "dup2 failed");
 113    }
 114 }
 115 
 116 JNIEXPORT jint JNICALL
 117 Java_sun_nio_ch_InheritedChannel_open0(JNIEnv *env, jclass cla, jstring path, jint oflag)
 118 {
 119     const char *str;
 120     int oflag_actual;
 121 
 122     /* convert to OS specific value */
 123     switch (oflag) {
 124         case sun_nio_ch_InheritedChannel_O_RDWR :
 125             oflag_actual = O_RDWR;
 126             break;
 127         case sun_nio_ch_InheritedChannel_O_RDONLY :
 128             oflag_actual = O_RDONLY;
 129             break;
 130         case sun_nio_ch_InheritedChannel_O_WRONLY :
 131             oflag_actual = O_WRONLY;
 132             break;
 133         default :
 134             JNU_ThrowInternalError(env, "Unrecognized file mode");
 135             return -1;
 136     }
 137 
 138     str = JNU_GetStringPlatformChars(env, path, NULL);
 139     if (str == NULL) {
 140         return (jint)-1;
 141     } else {
 142         int fd = open(str, oflag_actual);
 143         if (fd < 0) {
 144             JNU_ThrowIOExceptionWithLastError(env, str);
 145         }
 146         JNU_ReleaseStringPlatformChars(env, path, str);
 147         return (jint)fd;
 148     }
 149 }
 150 
 151 JNIEXPORT void JNICALL
 152 Java_sun_nio_ch_InheritedChannel_close0(JNIEnv *env, jclass cla, jint fd)
 153 {
 154     if (close(fd) < 0) {
 155         JNU_ThrowIOExceptionWithLastError(env, "close failed");
 156     }
 157 }