400 lines
11 KiB
C
400 lines
11 KiB
C
/* VMNetworkInterface.c - Native methods for NetworkInterface class
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Copyright (C) 2003, 2005, 2006, 2008 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <sys/types.h>
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#include <sys/socket.h>
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#ifdef HAVE_IFADDRS_H
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#include <ifaddrs.h>
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#endif
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#include <netinet/in.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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/* Required on Solaris. */
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#include <unistd.h>
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#ifdef HAVE_SYS_SOCKIO_H
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# include <sys/sockio.h>
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#endif
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#include <jni.h>
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#include <jcl.h>
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#include <cpnative.h>
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#include <cpnet.h>
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#include "java_net_VMNetworkInterface.h"
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int iff_flags(JNIEnv *, jstring, jint *);
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static jmethodID java_net_VMNetworkInterface_init;
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static jmethodID java_net_VMNetworkInterface_addAddress;
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/*
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* Initialize our static method ID's.
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*
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* Class: java_net_VMNetworkInterface
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* Method: initIds
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL
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Java_java_net_VMNetworkInterface_initIds (JNIEnv *env, jclass clazz)
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{
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java_net_VMNetworkInterface_init =
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(*env)->GetMethodID (env, clazz, "<init>", "(Ljava/lang/String;)V");
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if (java_net_VMNetworkInterface_init == NULL)
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{
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if (!(*env)->ExceptionCheck (env))
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JCL_ThrowException (env, "java/lang/NoSuchMethodError",
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"VMNetworkinterface.addAddress");
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return;
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}
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java_net_VMNetworkInterface_addAddress =
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(*env)->GetMethodID (env, clazz, "addAddress", "(Ljava/nio/ByteBuffer;)V");
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if (java_net_VMNetworkInterface_addAddress == NULL)
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{
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if (!(*env)->ExceptionCheck (env))
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JCL_ThrowException (env, "java/lang/NoSuchMethodError",
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"VMNetworkinterface.addAddress");
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}
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}
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struct netif_entry
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{
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char *name;
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jobject netif;
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int numaddrs;
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struct netif_entry *next;
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};
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#if defined (HAVE_IFADDRS_H) && defined (HAVE_GETIFADDRS)
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static void
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free_netif_list (JNIEnv *env, struct netif_entry *list)
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{
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while (list != NULL)
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{
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struct netif_entry *e = list->next;
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JCL_free (env, list);
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list = e;
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}
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}
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#endif
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/*
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* Returns all local network interfaces as an array.
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*/
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JNIEXPORT jobjectArray JNICALL
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Java_java_net_VMNetworkInterface_getVMInterfaces (JNIEnv * env,
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jclass clazz UNUSED)
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{
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#if defined (HAVE_IFADDRS_H) && defined (HAVE_GETIFADDRS)
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struct ifaddrs *ifaddrs, *i;
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struct netif_entry *iflist = NULL, *e;
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jobjectArray netifs;
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int numifs = 0;
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int k;
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if (getifaddrs (&ifaddrs) == -1)
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{
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JCL_ThrowException (env, "java/net/SocketException", strerror (errno));
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return NULL;
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}
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for (i = ifaddrs; i != NULL; i = i->ifa_next)
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{
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if (iflist == NULL)
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{
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iflist = JCL_malloc (env, sizeof (struct netif_entry));
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if (iflist == NULL)
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{
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freeifaddrs (ifaddrs);
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return NULL;
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}
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iflist->name = i->ifa_name;
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iflist->numaddrs = 0;
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iflist->next = NULL;
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iflist->netif = (*env)->NewObject (env, clazz, java_net_VMNetworkInterface_init,
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(*env)->NewStringUTF (env, i->ifa_name));
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if (iflist->netif == NULL)
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{
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freeifaddrs (ifaddrs);
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JCL_free (env, iflist);
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return NULL;
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}
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e = iflist;
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}
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else
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{
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struct netif_entry *p = NULL;
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for (e = iflist; e != NULL; e = e->next)
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{
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if (strcmp (e->name, i->ifa_name) == 0)
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break;
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p = e;
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}
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if (e == NULL)
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{
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p->next = (struct netif_entry *) JCL_malloc (env, sizeof (struct netif_entry));
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if (p->next == NULL)
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{
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free_netif_list (env, iflist);
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freeifaddrs (ifaddrs);
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return NULL;
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}
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e = p->next;
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e->name = i->ifa_name;
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e->numaddrs = 0;
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e->next = NULL;
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e->netif = (*env)->NewObject (env, clazz, java_net_VMNetworkInterface_init,
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(*env)->NewStringUTF (env, i->ifa_name));
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if (e->netif == NULL)
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{
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free_netif_list (env, iflist);
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freeifaddrs (ifaddrs);
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return NULL;
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}
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}
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}
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if (i->ifa_addr == NULL)
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continue;
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if (i->ifa_addr->sa_family == AF_INET)
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{
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struct sockaddr_in *sin = (struct sockaddr_in *) i->ifa_addr;
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jobject buffer = (*env)->NewDirectByteBuffer (env, &(sin->sin_addr.s_addr), 4);
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(*env)->CallVoidMethod (env, e->netif, java_net_VMNetworkInterface_addAddress,
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buffer);
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if ((*env)->ExceptionCheck (env))
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{
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free_netif_list (env, iflist);
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freeifaddrs (ifaddrs);
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return NULL;
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}
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(*env)->DeleteLocalRef (env, buffer);
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e->numaddrs++;
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}
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#ifdef HAVE_INET6
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else if (i->ifa_addr->sa_family == AF_INET6)
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{
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struct sockaddr_in6 *sin = (struct sockaddr_in6 *) i->ifa_addr;
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jobject buffer = (*env)->NewDirectByteBuffer (env, &(sin->sin6_addr.s6_addr), 16);
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(*env)->CallVoidMethod (env, e->netif, java_net_VMNetworkInterface_addAddress,
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buffer);
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if ((*env)->ExceptionCheck (env))
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{
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free_netif_list (env, iflist);
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freeifaddrs (ifaddrs);
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return NULL;
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}
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(*env)->DeleteLocalRef (env, buffer);
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e->numaddrs++;
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}
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#endif /* HAVE_INET6 */
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}
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/* Count how many interfaces we have that have addresses. */
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for (e = iflist; e != NULL; e = e->next)
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{
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if (e->numaddrs != 0)
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numifs++;
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}
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netifs = (*env)->NewObjectArray (env, numifs, clazz, NULL);
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k = 0;
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for (e = iflist; e != NULL && k < numifs; e = e->next)
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{
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if (e->numaddrs != 0)
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{
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(*env)->SetObjectArrayElement (env, netifs, k, e->netif);
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(*env)->DeleteLocalRef (env, e->netif);
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k++;
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}
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}
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free_netif_list (env, iflist);
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freeifaddrs (ifaddrs);
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return netifs;
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#else
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JCL_ThrowException (env, "java/net/SocketException", "getifaddrs not supported");
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return NULL;
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#endif /* HAVE_IFADDRS_H && HAVE_GETIFADDRS */
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}
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int iff_flags(JNIEnv *env, jstring name, jint *flags)
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{
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struct ifreq iff;
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const char *iff_name;
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jint socket;
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int error, retval;
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if ((error = cpnet_openSocketDatagram(env, &socket, AF_INET)))
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{
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return error;
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}
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iff_name = JCL_jstring_to_cstring(env, name);
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memset(&iff, 0, sizeof(iff));
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strcpy(iff.ifr_name, iff_name);
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if (ioctl(socket, SIOCGIFFLAGS, &iff) >= 0)
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{
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*flags = (jint) iff.ifr_flags;
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retval = 0;
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}
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else
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{
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retval = errno;
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}
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cpnet_close(env, socket);
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JCL_free_cstring(env, name, iff_name);
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return retval;
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}
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JNIEXPORT jboolean JNICALL
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Java_java_net_VMNetworkInterface_isUp (JNIEnv *env, jclass class UNUSED,
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jstring name)
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{
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jint flags;
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int error;
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jboolean retval;
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if ((error = iff_flags(env, name, &flags)))
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{
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JCL_ThrowException(env, "java/net/SocketException",
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cpnative_getErrorString(error));
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retval = JNI_FALSE;
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}
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else
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{
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retval = (flags & (IFF_UP | IFF_RUNNING))
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? JNI_TRUE
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: JNI_FALSE;
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}
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return retval;
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}
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JNIEXPORT jboolean JNICALL
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Java_java_net_VMNetworkInterface_isPointToPoint (JNIEnv *env,
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jclass class UNUSED,
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jstring name)
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{
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jint flags;
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int error;
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jboolean retval;
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if ((error = iff_flags(env, name, &flags)))
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{
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JCL_ThrowException(env, "java/net/SocketException",
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cpnative_getErrorString(error));
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retval = JNI_FALSE;
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}
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else
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{
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retval = (flags & IFF_POINTOPOINT) ? JNI_TRUE
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: JNI_FALSE;
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}
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return retval;
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}
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JNIEXPORT jboolean JNICALL
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Java_java_net_VMNetworkInterface_isLoopback (JNIEnv *env,
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jclass class UNUSED,
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jstring name)
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{
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jint flags;
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int error;
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jboolean retval;
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if ((error = iff_flags(env, name, &flags)))
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{
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JCL_ThrowException(env, "java/net/SocketException",
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cpnative_getErrorString(error));
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retval = JNI_FALSE;
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}
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else
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{
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retval = (flags & IFF_LOOPBACK) ? JNI_TRUE : JNI_FALSE;
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}
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return retval;
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}
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JNIEXPORT jboolean JNICALL
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Java_java_net_VMNetworkInterface_supportsMulticast (JNIEnv *env,
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jclass class UNUSED,
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jstring name)
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{
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jint flags;
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int error;
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jboolean retval;
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if ((error = iff_flags(env, name, &flags)))
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{
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JCL_ThrowException(env, "java/net/SocketException",
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cpnative_getErrorString(error));
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retval = JNI_FALSE;
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}
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else
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{
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retval = (flags & IFF_MULTICAST) ? JNI_TRUE : JNI_FALSE;
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}
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return retval;
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}
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/* end of file */
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