1 /*

     2  * Copyright (c) 2018, 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 /*

    27  * Test if rsocket is available

    28  */

    29 #include <stdlib.h>

    30 #ifdef __linux__

    31 #include <dlfcn.h>

    32 #include <sys/socket.h>

    33 #include <stdio.h>

    34 #include <string.h>

    35 #endif

    36 #include "jni.h"

    37 

    38 jfieldID fid;

    39 

    40 /*

    41  * Class:     RsocketTest

    42  * Method:    isRsocketAvailable0

    43  * Signature: ()Z

    44  */

    45 JNIEXPORT jboolean

    46 Java_RsocketTest_isRsocketAvailable0(JNIEnv *env, jclass cls) {

    47     jboolean result = JNI_FALSE;

    48 #ifdef __linux__

    49     void *handle;

    50     int (*rs)(int, int, int);

    51     char str[74];

    52     strcpy(str, "librdmacm.so.1: cannot open shared object file: No such file or directory");

    53     fid = (*env)->GetStaticFieldID(env, cls , "libInstalled", "Z");

    54 

    55     handle = dlopen("librdmacm.so.1", RTLD_NOW);

    56     if (!handle) {

    57         int ret = strncmp(str, dlerror(), 74);

    58         if (ret == 0) {

    59             (*env)->SetStaticBooleanField(env, cls, fid, JNI_FALSE);

    60         }

    61         return JNI_FALSE;

    62     } else {

    63         (*env)->SetStaticBooleanField(env, cls, fid, JNI_TRUE);

    64     }

    65  

    66     rs = dlsym(handle, "rsocket");

    67     if (!rs)

    68         return JNI_FALSE;

    69   

    70     if ((*rs)(AF_INET, SOCK_STREAM, 0) > 0)

    71         result = JNI_TRUE;

    72 

    73     dlclose(handle);

    74 #endif

    75     return result;

    76 }