/libjava/classpath/native/jni/java-net/java_net_VMNetworkInterface.c
C | 399 lines | 304 code | 46 blank | 49 comment | 54 complexity | 1f5593d6da9a914bfb9e97e09bee7f64 MD5 | raw file
- /* VMNetworkInterface.c - Native methods for NetworkInterface class
- Copyright (C) 2003, 2005, 2006, 2008 Free Software Foundation, Inc.
- This file is part of GNU Classpath.
- GNU Classpath is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Classpath is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNU Classpath; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301 USA.
- Linking this library statically or dynamically with other modules is
- making a combined work based on this library. Thus, the terms and
- conditions of the GNU General Public License cover the whole
- combination.
- As a special exception, the copyright holders of this library give you
- permission to link this library with independent modules to produce an
- executable, regardless of the license terms of these independent
- modules, and to copy and distribute the resulting executable under
- terms of your choice, provided that you also meet, for each linked
- independent module, the terms and conditions of the license of that
- module. An independent module is a module which is not derived from
- or based on this library. If you modify this library, you may extend
- this exception to your version of the library, but you are not
- obligated to do so. If you do not wish to do so, delete this
- exception statement from your version. */
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif /* HAVE_CONFIG_H */
- #include <sys/types.h>
- #include <sys/socket.h>
- #ifdef HAVE_IFADDRS_H
- #include <ifaddrs.h>
- #endif
- #include <netinet/in.h>
- #include <errno.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <net/if.h>
- #include <sys/ioctl.h>
- /* Required on Solaris. */
- #include <unistd.h>
- #ifdef HAVE_SYS_SOCKIO_H
- # include <sys/sockio.h>
- #endif
- #include <jni.h>
- #include <jcl.h>
- #include <cpnative.h>
- #include <cpnet.h>
- #include "java_net_VMNetworkInterface.h"
- int iff_flags(JNIEnv *, jstring, jint *);
- static jmethodID java_net_VMNetworkInterface_init;
- static jmethodID java_net_VMNetworkInterface_addAddress;
- /*
- * Initialize our static method ID's.
- *
- * Class: java_net_VMNetworkInterface
- * Method: initIds
- * Signature: ()V
- */
- JNIEXPORT void JNICALL
- Java_java_net_VMNetworkInterface_initIds (JNIEnv *env, jclass clazz)
- {
- java_net_VMNetworkInterface_init =
- (*env)->GetMethodID (env, clazz, "<init>", "(Ljava/lang/String;)V");
- if (java_net_VMNetworkInterface_init == NULL)
- {
- if (!(*env)->ExceptionCheck (env))
- JCL_ThrowException (env, "java/lang/NoSuchMethodError",
- "VMNetworkinterface.addAddress");
- return;
- }
- java_net_VMNetworkInterface_addAddress =
- (*env)->GetMethodID (env, clazz, "addAddress", "(Ljava/nio/ByteBuffer;)V");
- if (java_net_VMNetworkInterface_addAddress == NULL)
- {
- if (!(*env)->ExceptionCheck (env))
- JCL_ThrowException (env, "java/lang/NoSuchMethodError",
- "VMNetworkinterface.addAddress");
- }
- }
- struct netif_entry
- {
- char *name;
- jobject netif;
- int numaddrs;
- struct netif_entry *next;
- };
- #if defined (HAVE_IFADDRS_H) && defined (HAVE_GETIFADDRS)
- static void
- free_netif_list (JNIEnv *env, struct netif_entry *list)
- {
- while (list != NULL)
- {
- struct netif_entry *e = list->next;
- JCL_free (env, list);
- list = e;
- }
- }
- #endif
- /*
- * Returns all local network interfaces as an array.
- */
- JNIEXPORT jobjectArray JNICALL
- Java_java_net_VMNetworkInterface_getVMInterfaces (JNIEnv * env,
- jclass clazz UNUSED)
- {
- #if defined (HAVE_IFADDRS_H) && defined (HAVE_GETIFADDRS)
- struct ifaddrs *ifaddrs, *i;
- struct netif_entry *iflist = NULL, *e;
- jobjectArray netifs;
- int numifs = 0;
- int k;
- if (getifaddrs (&ifaddrs) == -1)
- {
- JCL_ThrowException (env, "java/net/SocketException", strerror (errno));
- return NULL;
- }
- for (i = ifaddrs; i != NULL; i = i->ifa_next)
- {
- if (iflist == NULL)
- {
- iflist = JCL_malloc (env, sizeof (struct netif_entry));
- if (iflist == NULL)
- {
- freeifaddrs (ifaddrs);
- return NULL;
- }
- iflist->name = i->ifa_name;
- iflist->numaddrs = 0;
- iflist->next = NULL;
- iflist->netif = (*env)->NewObject (env, clazz, java_net_VMNetworkInterface_init,
- (*env)->NewStringUTF (env, i->ifa_name));
- if (iflist->netif == NULL)
- {
- freeifaddrs (ifaddrs);
- JCL_free (env, iflist);
- return NULL;
- }
- e = iflist;
- }
- else
- {
- struct netif_entry *p = NULL;
- for (e = iflist; e != NULL; e = e->next)
- {
- if (strcmp (e->name, i->ifa_name) == 0)
- break;
- p = e;
- }
- if (e == NULL)
- {
- p->next = (struct netif_entry *) JCL_malloc (env, sizeof (struct netif_entry));
- if (p->next == NULL)
- {
- free_netif_list (env, iflist);
- freeifaddrs (ifaddrs);
- return NULL;
- }
- e = p->next;
- e->name = i->ifa_name;
- e->numaddrs = 0;
- e->next = NULL;
- e->netif = (*env)->NewObject (env, clazz, java_net_VMNetworkInterface_init,
- (*env)->NewStringUTF (env, i->ifa_name));
- if (e->netif == NULL)
- {
- free_netif_list (env, iflist);
- freeifaddrs (ifaddrs);
- return NULL;
- }
- }
- }
- if (i->ifa_addr == NULL)
- continue;
- if (i->ifa_addr->sa_family == AF_INET)
- {
- struct sockaddr_in *sin = (struct sockaddr_in *) i->ifa_addr;
- jobject buffer = (*env)->NewDirectByteBuffer (env, &(sin->sin_addr.s_addr), 4);
- (*env)->CallVoidMethod (env, e->netif, java_net_VMNetworkInterface_addAddress,
- buffer);
- if ((*env)->ExceptionCheck (env))
- {
- free_netif_list (env, iflist);
- freeifaddrs (ifaddrs);
- return NULL;
- }
- (*env)->DeleteLocalRef (env, buffer);
- e->numaddrs++;
- }
- #ifdef HAVE_INET6
- else if (i->ifa_addr->sa_family == AF_INET6)
- {
- struct sockaddr_in6 *sin = (struct sockaddr_in6 *) i->ifa_addr;
- jobject buffer = (*env)->NewDirectByteBuffer (env, &(sin->sin6_addr.s6_addr), 16);
- (*env)->CallVoidMethod (env, e->netif, java_net_VMNetworkInterface_addAddress,
- buffer);
- if ((*env)->ExceptionCheck (env))
- {
- free_netif_list (env, iflist);
- freeifaddrs (ifaddrs);
- return NULL;
- }
- (*env)->DeleteLocalRef (env, buffer);
- e->numaddrs++;
- }
- #endif /* HAVE_INET6 */
- }
- /* Count how many interfaces we have that have addresses. */
- for (e = iflist; e != NULL; e = e->next)
- {
- if (e->numaddrs != 0)
- numifs++;
- }
- netifs = (*env)->NewObjectArray (env, numifs, clazz, NULL);
- k = 0;
- for (e = iflist; e != NULL && k < numifs; e = e->next)
- {
- if (e->numaddrs != 0)
- {
- (*env)->SetObjectArrayElement (env, netifs, k, e->netif);
- (*env)->DeleteLocalRef (env, e->netif);
- k++;
- }
- }
- free_netif_list (env, iflist);
- freeifaddrs (ifaddrs);
- return netifs;
- #else
- JCL_ThrowException (env, "java/net/SocketException", "getifaddrs not supported");
- return NULL;
- #endif /* HAVE_IFADDRS_H && HAVE_GETIFADDRS */
- }
- int iff_flags(JNIEnv *env, jstring name, jint *flags)
- {
- struct ifreq iff;
- const char *iff_name;
- jint socket;
- int error, retval;
- if ((error = cpnet_openSocketDatagram(env, &socket, AF_INET)))
- {
- return error;
- }
- iff_name = JCL_jstring_to_cstring(env, name);
- memset(&iff, 0, sizeof(iff));
- strcpy(iff.ifr_name, iff_name);
-
- if (ioctl(socket, SIOCGIFFLAGS, &iff) >= 0)
- {
- *flags = (jint) iff.ifr_flags;
- retval = 0;
- }
- else
- {
- retval = errno;
- }
- cpnet_close(env, socket);
- JCL_free_cstring(env, name, iff_name);
- return retval;
- }
- JNIEXPORT jboolean JNICALL
- Java_java_net_VMNetworkInterface_isUp (JNIEnv *env, jclass class UNUSED,
- jstring name)
- {
- jint flags;
- int error;
- jboolean retval;
- if ((error = iff_flags(env, name, &flags)))
- {
- JCL_ThrowException(env, "java/net/SocketException",
- cpnative_getErrorString(error));
- retval = JNI_FALSE;
- }
- else
- {
- retval = (flags & (IFF_UP | IFF_RUNNING))
- ? JNI_TRUE
- : JNI_FALSE;
- }
- return retval;
- }
- JNIEXPORT jboolean JNICALL
- Java_java_net_VMNetworkInterface_isPointToPoint (JNIEnv *env,
- jclass class UNUSED,
- jstring name)
- {
- jint flags;
- int error;
- jboolean retval;
- if ((error = iff_flags(env, name, &flags)))
- {
- JCL_ThrowException(env, "java/net/SocketException",
- cpnative_getErrorString(error));
- retval = JNI_FALSE;
- }
- else
- {
- retval = (flags & IFF_POINTOPOINT) ? JNI_TRUE
- : JNI_FALSE;
- }
- return retval;
- }
- JNIEXPORT jboolean JNICALL
- Java_java_net_VMNetworkInterface_isLoopback (JNIEnv *env,
- jclass class UNUSED,
- jstring name)
- {
- jint flags;
- int error;
- jboolean retval;
- if ((error = iff_flags(env, name, &flags)))
- {
- JCL_ThrowException(env, "java/net/SocketException",
- cpnative_getErrorString(error));
- retval = JNI_FALSE;
- }
- else
- {
- retval = (flags & IFF_LOOPBACK) ? JNI_TRUE : JNI_FALSE;
- }
- return retval;
- }
- JNIEXPORT jboolean JNICALL
- Java_java_net_VMNetworkInterface_supportsMulticast (JNIEnv *env,
- jclass class UNUSED,
- jstring name)
- {
- jint flags;
- int error;
- jboolean retval;
- if ((error = iff_flags(env, name, &flags)))
- {
- JCL_ThrowException(env, "java/net/SocketException",
- cpnative_getErrorString(error));
- retval = JNI_FALSE;
- }
- else
- {
- retval = (flags & IFF_MULTICAST) ? JNI_TRUE : JNI_FALSE;
- }
- return retval;
- }
- /* end of file */