--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/solaris/native/java/net/NetworkInterface.c Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1496 @@
+/*
+ * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+#include <errno.h>
+#include <strings.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#ifdef __solaris__
+#include <sys/dlpi.h>
+#include <fcntl.h>
+#include <stropts.h>
+#endif
+#ifdef __linux__
+#include <sys/ioctl.h>
+#include <bits/ioctls.h>
+#include <linux/sockios.h>
+#include <sys/utsname.h>
+#include <stdio.h>
+#else
+#include <sys/sockio.h>
+#endif
+
+#ifdef __linux__
+#define ifr_index ifr_ifindex
+#define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
+#endif
+
+#include "jvm.h"
+#include "jni_util.h"
+#include "net_util.h"
+
+typedef struct _netaddr {
+ struct sockaddr *addr;
+ struct sockaddr *brdcast;
+ short mask;
+ int family; /* to make searches simple */
+ struct _netaddr *next;
+} netaddr;
+
+typedef struct _netif {
+ char *name;
+ int index;
+ char virtual;
+ netaddr *addr;
+ struct _netif *childs;
+ struct _netif *next;
+} netif;
+
+/************************************************************************
+ * NetworkInterface
+ */
+
+#include "java_net_NetworkInterface.h"
+
+/************************************************************************
+ * NetworkInterface
+ */
+jclass ni_class;
+jfieldID ni_nameID;
+jfieldID ni_indexID;
+jfieldID ni_descID;
+jfieldID ni_addrsID;
+jfieldID ni_bindsID;
+jfieldID ni_virutalID;
+jfieldID ni_childsID;
+jfieldID ni_parentID;
+jmethodID ni_ctrID;
+
+static jclass ni_iacls;
+static jclass ni_ia4cls;
+static jclass ni_ia6cls;
+static jclass ni_ibcls;
+static jmethodID ni_ia4ctrID;
+static jmethodID ni_ia6ctrID;
+static jmethodID ni_ibctrID;
+static jfieldID ni_iaaddressID;
+static jfieldID ni_iafamilyID;
+static jfieldID ni_ia6ipaddressID;
+static jfieldID ni_ibaddressID;
+static jfieldID ni_ib4broadcastID;
+static jfieldID ni_ib4maskID;
+
+static jobject createNetworkInterface(JNIEnv *env, netif *ifs);
+
+static netif *enumInterfaces(JNIEnv *env);
+static netif *enumIPv4Interfaces(JNIEnv *env, netif *ifs);
+#ifdef AF_INET6
+static netif *enumIPv6Interfaces(JNIEnv *env, netif *ifs);
+#endif
+
+static netif *addif(JNIEnv *env, netif *ifs, char *if_name, int index,
+ int family, struct sockaddr *new_addrP, int new_addrlen,
+ short prefix);
+static void freeif(netif *ifs);
+static struct sockaddr *getBroadcast(JNIEnv *env, const char *ifname);
+static short getSubnet(JNIEnv *env, const char *ifname);
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: init
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL
+Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls) {
+ ni_class = (*env)->FindClass(env,"java/net/NetworkInterface");
+ ni_class = (*env)->NewGlobalRef(env, ni_class);
+ ni_nameID = (*env)->GetFieldID(env, ni_class,"name", "Ljava/lang/String;");
+ ni_indexID = (*env)->GetFieldID(env, ni_class, "index", "I");
+ ni_addrsID = (*env)->GetFieldID(env, ni_class, "addrs", "[Ljava/net/InetAddress;");
+ ni_bindsID = (*env)->GetFieldID(env, ni_class, "bindings", "[Ljava/net/InterfaceAddress;");
+ ni_descID = (*env)->GetFieldID(env, ni_class, "displayName", "Ljava/lang/String;");
+ ni_virutalID = (*env)->GetFieldID(env, ni_class, "virtual", "Z");
+ ni_childsID = (*env)->GetFieldID(env, ni_class, "childs", "[Ljava/net/NetworkInterface;");
+ ni_parentID = (*env)->GetFieldID(env, ni_class, "parent", "Ljava/net/NetworkInterface;");
+ ni_ctrID = (*env)->GetMethodID(env, ni_class, "<init>", "()V");
+
+ ni_iacls = (*env)->FindClass(env, "java/net/InetAddress");
+ ni_iacls = (*env)->NewGlobalRef(env, ni_iacls);
+ ni_ia4cls = (*env)->FindClass(env, "java/net/Inet4Address");
+ ni_ia4cls = (*env)->NewGlobalRef(env, ni_ia4cls);
+ ni_ia6cls = (*env)->FindClass(env, "java/net/Inet6Address");
+ ni_ia6cls = (*env)->NewGlobalRef(env, ni_ia6cls);
+ ni_ibcls = (*env)->FindClass(env, "java/net/InterfaceAddress");
+ ni_ibcls = (*env)->NewGlobalRef(env, ni_ibcls);
+ ni_ia4ctrID = (*env)->GetMethodID(env, ni_ia4cls, "<init>", "()V");
+ ni_ia6ctrID = (*env)->GetMethodID(env, ni_ia6cls, "<init>", "()V");
+ ni_ibctrID = (*env)->GetMethodID(env, ni_ibcls, "<init>", "()V");
+ ni_iaaddressID = (*env)->GetFieldID(env, ni_iacls, "address", "I");
+ ni_iafamilyID = (*env)->GetFieldID(env, ni_iacls, "family", "I");
+ ni_ia6ipaddressID = (*env)->GetFieldID(env, ni_ia6cls, "ipaddress", "[B");
+ ni_ibaddressID = (*env)->GetFieldID(env, ni_ibcls, "address", "Ljava/net/InetAddress;");
+ ni_ib4broadcastID = (*env)->GetFieldID(env, ni_ibcls, "broadcast", "Ljava/net/Inet4Address;");
+ ni_ib4maskID = (*env)->GetFieldID(env, ni_ibcls, "maskLength", "S");
+}
+
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: getByName0
+ * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface;
+ */
+JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByName0
+ (JNIEnv *env, jclass cls, jstring name) {
+
+ netif *ifs, *curr;
+ jboolean isCopy;
+ const char* name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
+ jobject obj = NULL;
+
+ ifs = enumInterfaces(env);
+ if (ifs == NULL) {
+ return NULL;
+ }
+
+ /*
+ * Search the list of interface based on name
+ */
+ curr = ifs;
+ while (curr != NULL) {
+ if (strcmp(name_utf, curr->name) == 0) {
+ break;
+ }
+ curr = curr->next;
+ }
+
+ /* if found create a NetworkInterface */
+ if (curr != NULL) {;
+ obj = createNetworkInterface(env, curr);
+ }
+
+ /* release the UTF string and interface list */
+ (*env)->ReleaseStringUTFChars(env, name, name_utf);
+ freeif(ifs);
+
+ return obj;
+}
+
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: getByIndex
+ * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface;
+ */
+JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByIndex
+ (JNIEnv *env, jclass cls, jint index) {
+
+ netif *ifs, *curr;
+ jobject obj = NULL;
+
+ if (index <= 0) {
+ return NULL;
+ }
+
+ ifs = enumInterfaces(env);
+ if (ifs == NULL) {
+ return NULL;
+ }
+
+ /*
+ * Search the list of interface based on index
+ */
+ curr = ifs;
+ while (curr != NULL) {
+ if (index == curr->index) {
+ break;
+ }
+ curr = curr->next;
+ }
+
+ /* if found create a NetworkInterface */
+ if (curr != NULL) {;
+ obj = createNetworkInterface(env, curr);
+ }
+
+ freeif(ifs);
+ return obj;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: getByInetAddress0
+ * Signature: (Ljava/net/InetAddress;)Ljava/net/NetworkInterface;
+ */
+JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByInetAddress0
+ (JNIEnv *env, jclass cls, jobject iaObj) {
+
+ netif *ifs, *curr;
+ int family = (*env)->GetIntField(env, iaObj, ni_iafamilyID) == IPv4?
+ AF_INET : AF_INET6;
+ jobject obj = NULL;
+ jboolean match = JNI_FALSE;
+
+ ifs = enumInterfaces(env);
+ if (ifs == NULL) {
+ return NULL;
+ }
+
+ curr = ifs;
+ while (curr != NULL) {
+ netaddr *addrP = curr->addr;
+
+ /*
+ * Iterate through each address on the interface
+ */
+ while (addrP != NULL) {
+
+ if (family == addrP->family) {
+ if (family == AF_INET) {
+ int address1 = htonl(((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr);
+ int address2 = (*env)->GetIntField(env, iaObj, ni_iaaddressID);
+
+ if (address1 == address2) {
+ match = JNI_TRUE;
+ break;
+ }
+ }
+
+#ifdef AF_INET6
+ if (family == AF_INET6) {
+ jbyte *bytes = (jbyte *)&(((struct sockaddr_in6*)addrP->addr)->sin6_addr);
+ jbyteArray ipaddress = (*env)->GetObjectField(env, iaObj, ni_ia6ipaddressID);
+ jbyte caddr[16];
+ int i;
+
+ (*env)->GetByteArrayRegion(env, ipaddress, 0, 16, caddr);
+ i = 0;
+ while (i < 16) {
+ if (caddr[i] != bytes[i]) {
+ break;
+ }
+ i++;
+ }
+ if (i >= 16) {
+ match = JNI_TRUE;
+ break;
+ }
+ }
+#endif
+
+ }
+
+ if (match) {
+ break;
+ }
+ addrP = addrP->next;
+ }
+
+ if (match) {
+ break;
+ }
+ curr = curr->next;
+ }
+
+ /* if found create a NetworkInterface */
+ if (match) {;
+ obj = createNetworkInterface(env, curr);
+ }
+
+ freeif(ifs);
+ return obj;
+}
+
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: getAll
+ * Signature: ()[Ljava/net/NetworkInterface;
+ */
+JNIEXPORT jobjectArray JNICALL Java_java_net_NetworkInterface_getAll
+ (JNIEnv *env, jclass cls) {
+
+ netif *ifs, *curr;
+ jobjectArray netIFArr;
+ jint arr_index, ifCount;
+
+ ifs = enumInterfaces(env);
+ if (ifs == NULL) {
+ return NULL;
+ }
+
+ /* count the interface */
+ ifCount = 0;
+ curr = ifs;
+ while (curr != NULL) {
+ ifCount++;
+ curr = curr->next;
+ }
+
+ /* allocate a NetworkInterface array */
+ netIFArr = (*env)->NewObjectArray(env, ifCount, cls, NULL);
+ if (netIFArr == NULL) {
+ freeif(ifs);
+ return NULL;
+ }
+
+ /*
+ * Iterate through the interfaces, create a NetworkInterface instance
+ * for each array element and populate the object.
+ */
+ curr = ifs;
+ arr_index = 0;
+ while (curr != NULL) {
+ jobject netifObj;
+
+ netifObj = createNetworkInterface(env, curr);
+ if (netifObj == NULL) {
+ freeif(ifs);
+ return NULL;
+ }
+
+ /* put the NetworkInterface into the array */
+ (*env)->SetObjectArrayElement(env, netIFArr, arr_index++, netifObj);
+
+ curr = curr->next;
+ }
+
+ freeif(ifs);
+ return netIFArr;
+}
+
+/*
+ * Create a NetworkInterface object, populate the name and index, and
+ * populate the InetAddress array based on the IP addresses for this
+ * interface.
+ */
+jobject createNetworkInterface(JNIEnv *env, netif *ifs)
+{
+ jobject netifObj;
+ jobject name;
+ jobjectArray addrArr;
+ jobjectArray bindArr;
+ jobjectArray childArr;
+ netaddr *addrs;
+ jint addr_index, addr_count, bind_index;
+ jint child_count, child_index;
+ netaddr *addrP;
+ netif *childP;
+ jobject tmp;
+
+ /*
+ * Create a NetworkInterface object and populate it
+ */
+ netifObj = (*env)->NewObject(env, ni_class, ni_ctrID);
+ name = (*env)->NewStringUTF(env, ifs->name);
+ if (netifObj == NULL || name == NULL) {
+ return NULL;
+ }
+ (*env)->SetObjectField(env, netifObj, ni_nameID, name);
+ (*env)->SetObjectField(env, netifObj, ni_descID, name);
+ (*env)->SetIntField(env, netifObj, ni_indexID, ifs->index);
+ (*env)->SetBooleanField(env, netifObj, ni_virutalID, ifs->virtual ? JNI_TRUE : JNI_FALSE);
+
+ /*
+ * Count the number of address on this interface
+ */
+ addr_count = 0;
+ addrP = ifs->addr;
+ while (addrP != NULL) {
+ addr_count++;
+ addrP = addrP->next;
+ }
+
+ /*
+ * Create the array of InetAddresses
+ */
+ addrArr = (*env)->NewObjectArray(env, addr_count, ni_iacls, NULL);
+ if (addrArr == NULL) {
+ return NULL;
+ }
+
+ bindArr = (*env)->NewObjectArray(env, addr_count, ni_ibcls, NULL);
+ if (bindArr == NULL) {
+ return NULL;
+ }
+ addrP = ifs->addr;
+ addr_index = 0;
+ bind_index = 0;
+ while (addrP != NULL) {
+ jobject iaObj = NULL;
+ jobject ibObj = NULL;
+
+ if (addrP->family == AF_INET) {
+ iaObj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID);
+ if (iaObj) {
+ (*env)->SetIntField(env, iaObj, ni_iaaddressID,
+ htonl(((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr));
+ }
+ ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
+ if (ibObj) {
+ (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
+ if (addrP->brdcast) {
+ jobject ia2Obj = NULL;
+ ia2Obj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID);
+ if (ia2Obj) {
+ (*env)->SetIntField(env, ia2Obj, ni_iaaddressID,
+ htonl(((struct sockaddr_in*)addrP->brdcast)->sin_addr.s_addr));
+ (*env)->SetObjectField(env, ibObj, ni_ib4broadcastID, ia2Obj);
+ (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask);
+ }
+ }
+ (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj);
+ }
+ }
+
+#ifdef AF_INET6
+ if (addrP->family == AF_INET6) {
+ int scope=0;
+ iaObj = (*env)->NewObject(env, ni_ia6cls, ni_ia6ctrID);
+ if (iaObj) {
+ jbyteArray ipaddress = (*env)->NewByteArray(env, 16);
+ if (ipaddress == NULL) {
+ return NULL;
+ }
+ (*env)->SetByteArrayRegion(env, ipaddress, 0, 16,
+ (jbyte *)&(((struct sockaddr_in6*)addrP->addr)->sin6_addr));
+#ifdef __linux__
+ if (!kernelIsV22()) {
+ scope = ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id;
+ }
+#else
+ scope = ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id;
+#endif
+ if (scope != 0) { /* zero is default value, no need to set */
+ (*env)->SetIntField(env, iaObj, ia6_scopeidID, scope);
+ (*env)->SetBooleanField(env, iaObj, ia6_scopeidsetID, JNI_TRUE);
+ (*env)->SetObjectField(env, iaObj, ia6_scopeifnameID, netifObj);
+ }
+ (*env)->SetObjectField(env, iaObj, ni_ia6ipaddressID, ipaddress);
+ }
+ ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
+ if (ibObj) {
+ (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
+ (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask);
+ (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj);
+ }
+ }
+#endif
+
+ if (iaObj == NULL) {
+ return NULL;
+ }
+
+ (*env)->SetObjectArrayElement(env, addrArr, addr_index++, iaObj);
+ addrP = addrP->next;
+ }
+
+ /*
+ * See if there is any virtual interface attached to this one.
+ */
+ child_count = 0;
+ childP = ifs->childs;
+ while (childP) {
+ child_count++;
+ childP = childP->next;
+ }
+
+ childArr = (*env)->NewObjectArray(env, child_count, ni_class, NULL);
+ if (childArr == NULL) {
+ return NULL;
+ }
+
+ /*
+ * Create the NetworkInterface instances for the sub-interfaces as
+ * well.
+ */
+ child_index = 0;
+ childP = ifs->childs;
+ while(childP) {
+ tmp = createNetworkInterface(env, childP);
+ if (tmp == NULL) {
+ return NULL;
+ }
+ (*env)->SetObjectField(env, tmp, ni_parentID, netifObj);
+ (*env)->SetObjectArrayElement(env, childArr, child_index++, tmp);
+ childP = childP->next;
+ }
+ (*env)->SetObjectField(env, netifObj, ni_addrsID, addrArr);
+ (*env)->SetObjectField(env, netifObj, ni_bindsID, bindArr);
+ (*env)->SetObjectField(env, netifObj, ni_childsID, childArr);
+
+ /* return the NetworkInterface */
+ return netifObj;
+}
+
+/*
+ * Enumerates all interfaces
+ */
+static netif *enumInterfaces(JNIEnv *env) {
+ netif *ifs;
+
+ /*
+ * Enumerate IPv4 addresses
+ */
+ ifs = enumIPv4Interfaces(env, NULL);
+ if (ifs == NULL) {
+ if ((*env)->ExceptionOccurred(env)) {
+ return NULL;
+ }
+ }
+
+ /*
+ * If IPv6 is available then enumerate IPv6 addresses.
+ */
+#ifdef AF_INET6
+ if (ipv6_available()) {
+ ifs = enumIPv6Interfaces(env, ifs);
+
+ if ((*env)->ExceptionOccurred(env)) {
+ freeif(ifs);
+ return NULL;
+ }
+ }
+#endif
+
+ return ifs;
+}
+
+
+/*
+ * Enumerates and returns all IPv4 interfaces
+ */
+static netif *enumIPv4Interfaces(JNIEnv *env, netif *ifs) {
+ int sock;
+ struct ifconf ifc;
+ struct ifreq *ifreqP;
+ char *buf;
+ int numifs;
+ unsigned i;
+ unsigned bufsize;
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ /*
+ * If EPROTONOSUPPORT is returned it means we don't have
+ * IPv4 support so don't throw an exception.
+ */
+ if (errno != EPROTONOSUPPORT) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ }
+ return ifs;
+ }
+
+#ifdef __linux__
+ /* need to do a dummy SIOCGIFCONF to determine the buffer size.
+ * SIOCGIFCOUNT doesn't work
+ */
+ ifc.ifc_buf = NULL;
+ if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "ioctl SIOCGIFCONF failed");
+ close(sock);
+ return ifs;
+ }
+ bufsize = ifc.ifc_len;
+#else
+ if (ioctl(sock, SIOCGIFNUM, (char *)&numifs) < 0) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "ioctl SIOCGIFNUM failed");
+ close(sock);
+ return ifs;
+ }
+ bufsize = numifs * sizeof (struct ifreq);
+#endif /* __linux__ */
+
+ buf = (char *)malloc(bufsize);
+ if (!buf) {
+ JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
+ (void) close(sock);
+ return ifs;
+ }
+ ifc.ifc_len = bufsize;
+ ifc.ifc_buf = buf;
+ if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "ioctl SIOCGIFCONF failed");
+ (void) close(sock);
+ (void) free(buf);
+ return ifs;
+ }
+
+ /*
+ * Iterate through each interface
+ */
+ ifreqP = ifc.ifc_req;
+ for (i=0; i<ifc.ifc_len/sizeof (struct ifreq); i++, ifreqP++) {
+ int index;
+ struct ifreq if2;
+
+ memset((char *)&if2, 0, sizeof(if2));
+ strcpy(if2.ifr_name, ifreqP->ifr_name);
+
+ /*
+ * Try to get the interface index
+ * (Not supported on Solaris 2.6 or 7)
+ */
+ if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) >= 0) {
+ index = if2.ifr_index;
+ } else {
+ index = -1;
+ }
+
+ /*
+ * Add to the list
+ */
+ ifs = addif(env, ifs, ifreqP->ifr_name, index, AF_INET,
+ (struct sockaddr *)&(ifreqP->ifr_addr),
+ sizeof(struct sockaddr_in), 0);
+
+ /*
+ * If an exception occurred then free the list
+ */
+ if ((*env)->ExceptionOccurred(env)) {
+ close(sock);
+ free(buf);
+ freeif(ifs);
+ return NULL;
+ }
+ }
+
+ /*
+ * Free socket and buffer
+ */
+ close(sock);
+ free(buf);
+ return ifs;
+}
+
+
+#if defined(__solaris__) && defined(AF_INET6)
+/*
+ * Enumerates and returns all IPv6 interfaces on Solaris
+ */
+static netif *enumIPv6Interfaces(JNIEnv *env, netif *ifs) {
+ int sock;
+ struct lifconf ifc;
+ struct lifreq *ifr;
+ int n;
+ char *buf;
+ struct lifnum numifs;
+ unsigned bufsize;
+
+ sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "Failed to create IPv6 socket");
+ return ifs;
+ }
+
+ /*
+ * Get the interface count
+ */
+ numifs.lifn_family = AF_UNSPEC;
+ numifs.lifn_flags = 0;
+ if (ioctl(sock, SIOCGLIFNUM, (char *)&numifs) < 0) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "ioctl SIOCGLIFNUM failed");
+ close(sock);
+ return ifs;
+ }
+
+ /*
+ * Enumerate the interface configurations
+ */
+ bufsize = numifs.lifn_count * sizeof (struct lifreq);
+ buf = (char *)malloc(bufsize);
+ if (!buf) {
+ JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
+ (void) close(sock);
+ return ifs;
+ }
+ ifc.lifc_family = AF_UNSPEC;
+ ifc.lifc_flags = 0;
+ ifc.lifc_len = bufsize;
+ ifc.lifc_buf = buf;
+ if (ioctl(sock, SIOCGLIFCONF, (char *)&ifc) < 0) {
+ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException",
+ "ioctl SIOCGLIFCONF failed");
+ close(sock);
+ free(buf);
+ return ifs;
+ }
+
+ /*
+ * Iterate through each interface
+ */
+ ifr = ifc.lifc_req;
+ for (n=0; n<numifs.lifn_count; n++, ifr++) {
+ int index = -1;
+ struct lifreq if2;
+
+ /*
+ * Ignore non-IPv6 addresses
+ */
+ if (ifr->lifr_addr.ss_family != AF_INET6) {
+ continue;
+ }
+
+ /*
+ * Get the index
+ */
+ memset((char *)&if2, 0, sizeof(if2));
+ strcpy(if2.lifr_name, ifr->lifr_name);
+ if (ioctl(sock, SIOCGLIFINDEX, (char *)&if2) >= 0) {
+ struct sockaddr_in6 *s6= (struct sockaddr_in6 *)&(ifr->lifr_addr);
+ index = if2.lifr_index;
+ s6->sin6_scope_id = index;
+ }
+
+ /* add to the list */
+ ifs = addif(env, ifs, ifr->lifr_name, index, AF_INET6,
+ (struct sockaddr *)&(ifr->lifr_addr),
+ sizeof(struct sockaddr_in6), (short) ifr->lifr_addrlen);
+
+ /*
+ * If an exception occurred we return
+ */
+ if ((*env)->ExceptionOccurred(env)) {
+ close(sock);
+ free(buf);
+ return ifs;
+ }
+
+ }
+
+ close(sock);
+ free(buf);
+ return ifs;
+
+}
+#endif
+
+
+#if defined(__linux__) && defined(AF_INET6)
+/*
+ * Enumerates and returns all IPv6 interfaces on Linux
+ */
+static netif *enumIPv6Interfaces(JNIEnv *env, netif *ifs) {
+ FILE *f;
+ char addr6[40], devname[20];
+ char addr6p[8][5];
+ int plen, scope, dad_status, if_idx;
+ uint8_t ipv6addr[16];
+
+ if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
+ while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n",
+ addr6p[0], addr6p[1], addr6p[2], addr6p[3],
+ addr6p[4], addr6p[5], addr6p[6], addr6p[7],
+ &if_idx, &plen, &scope, &dad_status, devname) != EOF) {
+ struct netif *ifs_ptr = NULL;
+ struct netif *last_ptr = NULL;
+ struct sockaddr_in6 addr;
+
+ sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
+ addr6p[0], addr6p[1], addr6p[2], addr6p[3],
+ addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
+ inet_pton(AF_INET6, addr6, ipv6addr);
+
+ memset(&addr, 0, sizeof(struct sockaddr_in6));
+ memcpy((void*)addr.sin6_addr.s6_addr, (const void*)ipv6addr, 16);
+ addr.sin6_scope_id = if_idx;
+
+ ifs = addif(env, ifs, devname, if_idx, AF_INET6,
+ (struct sockaddr *)&addr,
+ sizeof(struct sockaddr_in6), plen);
+
+ /*
+ * If an exception occurred then return the list as is.
+ */
+ if ((*env)->ExceptionOccurred(env)) {
+ fclose(f);
+ return ifs;
+ }
+ }
+ fclose(f);
+ }
+ return ifs;
+}
+#endif
+
+
+/*
+ * Free an interface list (including any attached addresses)
+ */
+void freeif(netif *ifs) {
+ netif *currif = ifs;
+ netif *child = NULL;
+
+ while (currif != NULL) {
+ netaddr *addrP = currif->addr;
+ while (addrP != NULL) {
+ netaddr *next = addrP->next;
+ if (addrP->addr != NULL)
+ free(addrP->addr);
+ if (addrP->brdcast != NULL)
+ free(addrP->brdcast);
+ free(addrP);
+ addrP = next;
+ }
+
+ free(currif->name);
+
+ /*
+ * Don't forget to free the sub-interfaces.
+ */
+ if (currif->childs != NULL) {
+ freeif(currif->childs);
+ }
+
+ ifs = currif->next;
+ free(currif);
+ currif = ifs;
+ }
+}
+
+/*
+ * Add an interface to the list. If known interface just link
+ * a new netaddr onto the list. If new interface create new
+ * netif structure.
+ */
+netif *addif(JNIEnv *env, netif *ifs, char *if_name, int index, int family,
+ struct sockaddr *new_addrP, int new_addrlen, short prefix) {
+ netif *currif = ifs, *parent;
+ netaddr *addrP;
+#ifdef LIFNAMSIZ
+ char name[LIFNAMSIZ];
+ char vname[LIFNAMSIZ];
+#else
+ char name[IFNAMSIZ];
+ char vname[IFNAMSIZ];
+#endif
+ char *unit;
+ int isVirtual = 0;
+
+ /*
+ * If the interface name is a logical interface then we
+ * remove the unit number so that we have the physical
+ * interface (eg: hme0:1 -> hme0). NetworkInterface
+ * currently doesn't have any concept of physical vs.
+ * logical interfaces.
+ */
+ strcpy(name, if_name);
+
+ /*
+ * Create and populate the netaddr node. If allocation fails
+ * return an un-updated list.
+ */
+ addrP = (netaddr *)malloc(sizeof(netaddr));
+ if (addrP) {
+ addrP->addr = (struct sockaddr *)malloc(new_addrlen);
+ if (addrP->addr == NULL) {
+ free(addrP);
+ addrP = NULL;
+ }
+ }
+ if (addrP == NULL) {
+ JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
+ return ifs; /* return untouched list */
+ }
+ memcpy(addrP->addr, new_addrP, new_addrlen);
+ addrP->family = family;
+
+ addrP->brdcast = NULL;
+ addrP->mask = prefix;
+ if (family == AF_INET) {
+ /*
+ * Deal with brodcast addr & subnet mask
+ */
+ addrP->brdcast = getBroadcast(env, name);
+ if (addrP->brdcast) {
+ addrP->mask = getSubnet(env, name);
+ }
+ }
+
+ vname[0] = 0;
+ unit = strchr(name, ':');
+ if (unit != NULL) {
+ /**
+ * This is a virtual interface. If we are able to access the parent
+ * we need to create a new entry if it doesn't exist yet *and* update
+ * the 'parent' interface with the new records.
+ */
+ struct ifreq if2;
+ int sock;
+ int len;
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ return ifs; /* return untouched list */
+ }
+
+ len = unit - name;
+ if (len > 0) {
+ // temporarily use vname to hold the parent name of the interface
+ // instead of creating another buffer.
+ memcpy(&vname, name, len);
+ vname[len] = '\0';
+
+ memset((char *) &if2, 0, sizeof(if2));
+ strcpy(if2.ifr_name, vname);
+
+ if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) >= 0) {
+ // Got access to parent, so create it if necessary.
+ strcpy(vname, name);
+ *unit = '\0';
+ }
+ else {
+ // failed to access parent interface do not create parent.
+ // We are a virtual interface with no parent.
+ isVirtual = 1;
+
+ vname[0] = 0;
+ }
+ }
+ close(sock);
+ }
+
+ /*
+ * Check if this is a "new" interface. Use the interface
+ * name for matching because index isn't supported on
+ * Solaris 2.6 & 7.
+ */
+ while (currif != NULL) {
+ if (strcmp(name, currif->name) == 0) {
+ break;
+ }
+ currif = currif->next;
+ }
+
+ /*
+ * If "new" then create an netif structure and
+ * insert it onto the list.
+ */
+ if (currif == NULL) {
+ currif = (netif *)malloc(sizeof(netif));
+ if (currif) {
+ currif->name = strdup(name);
+ if (currif->name == NULL) {
+ free(currif);
+ currif = NULL;
+ }
+ }
+ if (currif == NULL) {
+ JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
+ return ifs;
+ }
+ currif->index = index;
+ currif->addr = NULL;
+ currif->childs = NULL;
+ currif->virtual = isVirtual;
+ currif->next = ifs;
+ ifs = currif;
+ }
+
+ /*
+ * Finally insert the address on the interface
+ */
+ addrP->next = currif->addr;
+ currif->addr = addrP;
+
+ parent = currif;
+
+ /**
+ * Let's deal with the virtual interface now.
+ */
+ if (vname[0]) {
+ netaddr *tmpaddr;
+
+ currif = parent->childs;
+
+ while (currif != NULL) {
+ if (strcmp(vname, currif->name) == 0) {
+ break;
+ }
+ currif = currif->next;
+ }
+ if (currif == NULL) {
+ currif = (netif *)malloc(sizeof(netif));
+ if (currif) {
+ currif->name = strdup(vname);
+ if (currif->name == NULL) {
+ free(currif);
+ currif = NULL;
+ }
+ }
+ if (currif == NULL) {
+ JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
+ return ifs;
+ }
+ currif->index = index;
+ currif->addr = NULL;
+ /* Need to duplicate the addr entry? */
+ currif->virtual = 1;
+ currif->childs = NULL;
+ currif->next = parent->childs;
+ parent->childs = currif;
+ }
+
+ tmpaddr = (netaddr *) malloc(sizeof(netaddr));
+ if (tmpaddr == NULL) {
+ JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
+ return ifs;
+ }
+ memcpy(tmpaddr, addrP, sizeof(netaddr));
+ /**
+ * Let's duplicate the address and broadcast address structures
+ * if there are any.
+ */
+ if (addrP->addr != NULL) {
+ tmpaddr->addr = malloc(new_addrlen);
+ if (tmpaddr->addr != NULL)
+ memcpy(tmpaddr->addr, addrP->addr, new_addrlen);
+ }
+ if (addrP->brdcast != NULL) {
+ tmpaddr->brdcast = malloc(new_addrlen);
+ if (tmpaddr->brdcast != NULL)
+ memcpy(tmpaddr->brdcast, addrP->brdcast, new_addrlen);
+ }
+ tmpaddr->next = currif->addr;
+ currif->addr = tmpaddr;
+ }
+
+ return ifs;
+}
+
+/**
+ * Get flags from a NetworkInterface.
+ */
+static short getFlags(JNIEnv *env, jstring name) {
+ int sock;
+ struct ifreq if2;
+ jboolean isCopy;
+ const char* name_utf;
+ short ret = -1;
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ return -1;
+ }
+
+ name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
+ memset((char *) &if2, 0, sizeof(if2));
+ strcpy(if2.ifr_name, name_utf);
+
+ if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) >= 0) {
+ ret = if2.ifr_flags;
+ } else {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ ret = -1;
+ }
+ close(sock);
+ /* release the UTF string and interface list */
+ (*env)->ReleaseStringUTFChars(env, name, name_utf);
+
+ return ret;
+}
+
+/**
+ * Returns the IPv4 broadcast address of a named interface, if it exists.
+ * Returns 0 if it doesn't have one.
+ */
+static struct sockaddr *getBroadcast(JNIEnv *env, const char *ifname) {
+ int sock;
+ unsigned int mask;
+ struct sockaddr *ret = NULL;
+ struct ifreq if2;
+ short flag;
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ return ret;
+ }
+
+ memset((char *) &if2, 0, sizeof(if2));
+ strcpy(if2.ifr_name, ifname);
+ /* Let's make sure the interface does have a broadcast address */
+ if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) >= 0) {
+ flag = if2.ifr_flags;
+ } else {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ }
+ if (flag & IFF_BROADCAST) {
+ /* It does, let's retrieve it*/
+ if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) >= 0) {
+ ret = (struct sockaddr*) malloc(sizeof(struct sockaddr));
+ memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr));
+ } else {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ }
+ }
+ close(sock);
+ return ret;
+}
+
+/**
+ * Returns the IPv4 subnet prefix length (aka subnet mask) for the named
+ * interface, if it has one, otherwise return -1.
+ */
+static short getSubnet(JNIEnv *env, const char *ifname) {
+ int sock;
+ unsigned int mask;
+ short ret;
+ struct ifreq if2;
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ return -1;
+ }
+
+ memset((char *) &if2, 0, sizeof(if2));
+ strcpy(if2.ifr_name, ifname);
+ if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) >= 0) {
+ mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr);
+ ret = 0;
+ while (mask) {
+ mask <<= 1;
+ ret++;
+ }
+ close(sock);
+ return ret;
+ }
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ close(sock);
+ return -1;
+}
+
+#ifdef __solaris__
+#define DEV_PREFIX "/dev/"
+
+/**
+ * Solaris specific DLPI code to get hardware address from a device.
+ * Unfortunately, at least up to Solaris X, you have to have special
+ * privileges (i.e. be root).
+ */
+static int getMacFromDevice(JNIEnv *env, const char* ifname, unsigned char* retbuf) {
+ char style1dev[MAXPATHLEN];
+ int fd;
+ dl_phys_addr_req_t dlpareq;
+ dl_phys_addr_ack_t *dlpaack;
+ struct strbuf msg;
+ char buf[128];
+ int flags = 0;
+
+ /**
+ * Device is in /dev
+ * e.g.: /dev/bge0
+ */
+ strcpy(style1dev, DEV_PREFIX);
+ strcat(style1dev, ifname);
+ if ((fd = open(style1dev, O_RDWR)) == -1) {
+ /*
+ * Can't open it. We probably are missing the privilege.
+ * We'll have to try something else
+ */
+ return 0;
+ }
+ dlpareq.dl_primitive = DL_PHYS_ADDR_REQ;
+ dlpareq.dl_addr_type = DL_CURR_PHYS_ADDR;
+ msg.buf = (char *)&dlpareq;
+ msg.len = DL_PHYS_ADDR_REQ_SIZE;
+ if (putmsg(fd, &msg, NULL, 0) < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "putmsg failed");
+ return -1;
+ }
+ dlpaack = (dl_phys_addr_ack_t *)buf;
+ msg.buf = (char *)buf;
+ msg.len = 0;
+ msg.maxlen = sizeof (buf);
+ if (getmsg(fd, &msg, NULL, &flags) < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "getmsg failed");
+ return -1;
+ }
+ if (msg.len < DL_PHYS_ADDR_ACK_SIZE ||
+ dlpaack->dl_primitive != DL_PHYS_ADDR_ACK) {
+ JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
+ "Couldn't obtain phys addr\n");
+ return -1;
+ }
+
+ memcpy(retbuf, &buf[dlpaack->dl_addr_offset], dlpaack->dl_addr_length);
+ return dlpaack->dl_addr_length;
+}
+#endif
+
+/**
+ * Get the Hardware address (usually MAC address) for the named interface.
+ * return puts the data in buf, and returns the length, in byte, of the
+ * MAC address. Returns -1 if there is no hardware address on that interface.
+ */
+int getMacAddress(JNIEnv *env, const struct in_addr* addr, const char* ifname,
+ unsigned char *buf) {
+ int sock;
+#ifdef __linux__
+ static struct ifreq ifr;
+ int i;
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ return -1;
+ }
+
+ strcpy(ifr.ifr_name, ifname);
+
+ if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) {
+ fprintf(stderr, "SIOCIFHWADDR: %s\n",
+ strerror(errno));
+ close(sock);
+ return -1;
+ }
+ memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN);
+ close(sock);
+ for (i = 0; i < IFHWADDRLEN; i++) {
+ if (buf[i] != 0)
+ return IFHWADDRLEN;
+ }
+ /*
+ * All bytes to 0 means no hardware address.
+ */
+ return -1;
+#else
+ struct arpreq arpreq;
+ struct sockaddr_in* sin;
+ struct sockaddr_in ipAddr;
+ int len;
+
+ /**
+ * On Solaris we have to use DLPI, but it will only work if we have
+ * privileged access (i.e. root). If that fails, we try a lookup
+ * in the ARP table, which requires an IPv4 address.
+ */
+ if ((len = getMacFromDevice(env, ifname, buf)) > 0) {
+ return len;
+ }
+ if (addr == NULL) {
+ /**
+ * No IPv4 address for that interface, so can't do an ARP lookup.
+ */
+ return -1;
+ }
+ sin = (struct sockaddr_in *) &arpreq.arp_pa;
+ memset((char *) &arpreq, 0, sizeof(struct arpreq));
+ ipAddr.sin_port = 0;
+ ipAddr.sin_family = AF_INET;
+ memcpy(&ipAddr.sin_addr, addr, sizeof(struct in_addr));
+ memcpy(&arpreq.arp_pa, &ipAddr, sizeof(struct sockaddr_in));
+ arpreq.arp_flags= ATF_PUBL;
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ return -1;
+ }
+
+ if (ioctl(sock, SIOCGARP, &arpreq) >= 0) {
+ close(sock);
+ memcpy(buf, &arpreq.arp_ha.sa_data[0], 6);
+ return 6;
+ }
+
+ if (errno != ENXIO) {
+ // "No such device or address" means no hardware address, so it's
+ // normal don't throw an exception
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ }
+ close(sock);
+#endif
+ return -1;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: isUp0
+ * Signature: (Ljava/lang/String;I)Z
+ */
+JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isUp0
+ (JNIEnv *env, jclass cls, jstring name, jint index) {
+ short val;
+
+ val = getFlags(env, name);
+ if ( (val & IFF_UP) && (val & IFF_RUNNING))
+ return JNI_TRUE;
+ return JNI_FALSE;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: isP2P0
+ * Signature: (Ljava/lang/String;I)Z
+ */
+JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isP2P0
+ (JNIEnv *env, jclass cls, jstring name, jint index) {
+ if (getFlags(env, name) & IFF_POINTOPOINT)
+ return JNI_TRUE;
+ return JNI_FALSE;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: isLoopback0
+ * Signature: (Ljava/lang/String;I)Z
+ */
+JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isLoopback0
+ (JNIEnv *env, jclass cls, jstring name, jint index) {
+ if (getFlags(env, name) & IFF_LOOPBACK)
+ return JNI_TRUE;
+ return JNI_FALSE;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: supportsMulticast0
+ * Signature: (Ljava/lang/String;I)Z
+ */
+JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_supportsMulticast0
+(JNIEnv *env, jclass cls, jstring name, jint index) {
+ short val;
+
+ val = getFlags(env, name);
+ if (val & IFF_MULTICAST)
+ return JNI_TRUE;
+ return JNI_FALSE;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: getMacAddr0
+ * Signature: ([bLjava/lang/String;I)[b
+ */
+JNIEXPORT jbyteArray JNICALL Java_java_net_NetworkInterface_getMacAddr0(JNIEnv *env, jclass class, jbyteArray addrArray, jstring name, jint index) {
+ jint addr;
+ jbyte caddr[4];
+ struct in_addr iaddr;
+ jbyteArray ret = NULL;
+ unsigned char mac[16];
+ int len;
+ jboolean isCopy;
+ const char* name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
+
+ if (!IS_NULL(addrArray)) {
+ (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr);
+ addr = ((caddr[0]<<24) & 0xff000000);
+ addr |= ((caddr[1] <<16) & 0xff0000);
+ addr |= ((caddr[2] <<8) & 0xff00);
+ addr |= (caddr[3] & 0xff);
+ iaddr.s_addr = htonl(addr);
+ len = getMacAddress(env, &iaddr, name_utf, mac);
+ } else {
+ len = getMacAddress(env, NULL, name_utf, mac);
+ }
+ if (len > 0) {
+ ret = (*env)->NewByteArray(env, len);
+ if (IS_NULL(ret)) {
+ /* we may have memory to free at the end of this */
+ goto fexit;
+ }
+ (*env)->SetByteArrayRegion(env, ret, 0, len, (jbyte *) (mac));
+ }
+ fexit:
+ /* release the UTF string and interface list */
+ (*env)->ReleaseStringUTFChars(env, name, name_utf);
+ return ret;
+}
+
+/*
+ * Class: java_net_NetworkInterface
+ * Method: getMTU0
+ * Signature: ([bLjava/lang/String;I)I
+ */
+
+JNIEXPORT jint JNICALL Java_java_net_NetworkInterface_getMTU0(JNIEnv *env, jclass class, jstring name, jint index) {
+ jboolean isCopy;
+ int sock;
+ struct ifreq if2;
+ int ret = -1;
+ const char* name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
+
+ sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0) {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "Socket creation failed");
+ } else {
+
+#ifdef __linux__
+ memset((char *) &if2, 0, sizeof(if2));
+ strcpy(if2.ifr_name, name_utf);
+
+ if (ioctl(sock, SIOCGIFMTU, (char *)&if2) >= 0) {
+ ret= if2.ifr_mtu;
+ } else {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ }
+#else /* Solaris */
+ struct lifreq lifr;
+ memset((caddr_t)&lifr, 0, sizeof(lifr));
+ strcpy((caddr_t)&(lifr.lifr_name), name_utf);
+ if (ioctl(sock, SIOCGLIFMTU, (caddr_t)&lifr) >= 0) {
+ ret = lifr.lifr_mtu;
+ } else {
+ NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
+ "IOCTL failed");
+ }
+#endif
+ close(sock);
+ }
+ /* release the UTF string and interface list */
+ (*env)->ReleaseStringUTFChars(env, name, name_utf);
+ return ret;
+}