/* * Copyright (c) 2000, 2012, Oracle and/or its affiliates. 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ #include #include #if defined(_ALLBSD_SOURCE) && defined(__OpenBSD__) #include #endif #include #include #include #include #include #include #include #include #ifdef __solaris__ #include #include #include #include #endif #ifdef __linux__ #include #include #include #include #endif #ifdef __linux__ #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6" #endif #if defined(_ALLBSD_SOURCE) #include #include #include #if defined(__APPLE__) #include #include #include #include #include #endif #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; jfieldID ni_defaultIndexID; 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_ia6ipaddressID; static jfieldID ni_ibaddressID; static jfieldID ni_ib4broadcastID; static jfieldID ni_ib4maskID; /** Private methods declarations **/ static jobject createNetworkInterface(JNIEnv *env, netif *ifs); static int getFlags0(JNIEnv *env, jstring ifname); static netif *enumInterfaces(JNIEnv *env); static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs); #ifdef AF_INET6 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs); #endif static netif *addif(JNIEnv *env, int sock, const char * if_name, netif *ifs, struct sockaddr* ifr_addrP, int family, short prefix); static void freeif(netif *ifs); static int openSocket(JNIEnv *env, int proto); static int openSocketWithFallback(JNIEnv *env, const char *ifname); static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *name, struct sockaddr *brdcast_store); static short getSubnet(JNIEnv *env, int sock, const char *ifname); static int getIndex(int sock, const char *ifname); static int getFlags(int sock, const char *ifname, int *flags); static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf); static int getMTU(JNIEnv *env, int sock, const char *ifname); #ifdef __solaris__ static netif *enumIPvXInterfaces(JNIEnv *env, int sock, netif *ifs, int family); static int getMacFromDevice(JNIEnv *env, const char* ifname, unsigned char* retbuf); #ifndef SIOCGLIFHWADDR #define SIOCGLIFHWADDR _IOWR('i', 192, struct lifreq) #endif #endif /******************* Java entry points *****************************/ /* * 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, "", "()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, "", "()V"); ni_ia6ctrID = (*env)->GetMethodID(env, ni_ia6cls, "", "()V"); ni_ibctrID = (*env)->GetMethodID(env, ni_ibcls, "", "()V"); 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"); ni_defaultIndexID = (*env)->GetStaticFieldID(env, ni_class, "defaultIndex", "I"); } /* * 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; jobject obj = NULL; ifs = enumInterfaces(env); if (ifs == NULL) { return NULL; } name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); /* * 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: getByIndex0 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface; */ JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByIndex0 (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; #ifdef AF_INET6 int family = (getInetAddress_family(env, iaObj) == IPv4) ? AF_INET : AF_INET6; #else int family = AF_INET; #endif 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 = getInetAddress_addr(env, iaObj); 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; } /* * 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) { int ret = getFlags0(env, name); return ((ret & IFF_UP) && (ret & IFF_RUNNING)) ? JNI_TRUE : 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) { int ret = getFlags0(env, name); return (ret & IFF_POINTOPOINT) ? JNI_TRUE : 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) { int ret = getFlags0(env, name); return (ret & IFF_LOOPBACK) ? JNI_TRUE : 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) { int ret = getFlags0(env, name); return (ret & IFF_MULTICAST) ? JNI_TRUE : 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; int sock; jboolean isCopy; const char* name_utf; name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); if ((sock =openSocketWithFallback(env, name_utf)) < 0) { (*env)->ReleaseStringUTFChars(env, name, name_utf); return JNI_FALSE; } 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, sock, name_utf, &iaddr, mac); } else { len = getMacAddress(env, sock, name_utf,NULL, 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); close(sock); 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 ret = -1; int sock; const char* name_utf; name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); if ((sock =openSocketWithFallback(env, name_utf)) < 0) { (*env)->ReleaseStringUTFChars(env, name, name_utf); return JNI_FALSE; } ret = getMTU(env, sock, name_utf); (*env)->ReleaseStringUTFChars(env, name, name_utf); close(sock); return ret; } /*** Private methods definitions ****/ static int getFlags0(JNIEnv *env, jstring name) { jboolean isCopy; int ret, sock; const char* name_utf; int flags = 0; name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); if ((sock = openSocketWithFallback(env, name_utf)) < 0) { (*env)->ReleaseStringUTFChars(env, name, name_utf); return -1; } ret = getFlags(sock, name_utf, &flags); close(sock); (*env)->ReleaseStringUTFChars(env, name, name_utf); if (ret < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFFLAGS failed"); return -1; } return flags; } /* * 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) { setInetAddress_addr(env, iaObj, 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) { setInetAddress_addr(env, ia2Obj, 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)); scope = ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id; 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; int sock; /* * Enumerate IPv4 addresses */ sock = openSocket(env, AF_INET); if (sock < 0 && (*env)->ExceptionOccurred(env)) { return NULL; } ifs = enumIPv4Interfaces(env, sock, NULL); close(sock); if (ifs == NULL && (*env)->ExceptionOccurred(env)) { return NULL; } /* return partial list if an exception occurs in the middle of process ???*/ /* * If IPv6 is available then enumerate IPv6 addresses. */ #ifdef AF_INET6 /* User can disable ipv6 explicitly by -Djava.net.preferIPv4Stack=true, * so we have to call ipv6_available() */ if (ipv6_available()) { sock = openSocket(env, AF_INET6); if (sock < 0 && (*env)->ExceptionOccurred(env)) { freeif(ifs); return NULL; } ifs = enumIPv6Interfaces(env, sock, ifs); close(sock); if ((*env)->ExceptionOccurred(env)) { freeif(ifs); return NULL; } } #endif return ifs; } #define CHECKED_MALLOC3(_pointer,_type,_size) \ do{ \ _pointer = (_type)malloc( _size ); \ if (_pointer == NULL) { \ JNU_ThrowOutOfMemoryError(env, "Native heap allocation failed"); \ return ifs; /* return untouched list */ \ } \ } while(0) /* * 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; free(addrP); addrP = next; } /* * Don't forget to free the sub-interfaces. */ if (currif->childs != NULL) { freeif(currif->childs); } ifs = currif->next; free(currif); currif = ifs; } } netif *addif(JNIEnv *env, int sock, const char * if_name, netif *ifs, struct sockaddr* ifr_addrP, int family, short prefix) { netif *currif = ifs, *parent; netaddr *addrP; #ifdef LIFNAMSIZ int ifnam_size = LIFNAMSIZ; char name[LIFNAMSIZ], vname[LIFNAMSIZ]; #else int ifnam_size = IFNAMSIZ; char name[IFNAMSIZ], vname[IFNAMSIZ]; #endif char *name_colonP; int mask; int isVirtual = 0; int addr_size; int flags = 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. */ strncpy(name, if_name, ifnam_size); name[ifnam_size - 1] = '\0'; *vname = 0; /* * Create and populate the netaddr node. If allocation fails * return an un-updated list. */ /*Allocate for addr and brdcast at once*/ #ifdef AF_INET6 addr_size = (family == AF_INET) ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6); #else addr_size = sizeof(struct sockaddr_in); #endif CHECKED_MALLOC3(addrP, netaddr *, sizeof(netaddr)+2*addr_size); addrP->addr = (struct sockaddr *)( (char *) addrP+sizeof(netaddr) ); memcpy(addrP->addr, ifr_addrP, addr_size); addrP->family = family; addrP->brdcast = NULL; addrP->mask = prefix; addrP->next = 0; if (family == AF_INET) { // Deal with broadcast addr & subnet mask struct sockaddr * brdcast_to = (struct sockaddr *) ((char *) addrP + sizeof(netaddr) + addr_size); addrP->brdcast = getBroadcast(env, sock, name, brdcast_to ); if ((mask = getSubnet(env, sock, name)) != -1) addrP->mask = mask; } /** * Deal with virtual interface with colon notation e.g. eth0:1 */ name_colonP = strchr(name, ':'); if (name_colonP != 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. */ *name_colonP = 0; if (getFlags(sock, name, &flags) < 0 || flags < 0) { // failed to access parent interface do not create parent. // We are a virtual interface with no parent. isVirtual = 1; *name_colonP = ':'; } else{ // Got access to parent, so create it if necessary. // Save original name to vname and truncate name by ':' memcpy(vname, name, sizeof(vname) ); vname[name_colonP - name] = ':'; } } /* * 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) { CHECKED_MALLOC3(currif, netif *, sizeof(netif) + ifnam_size); currif->name = (char *) currif+sizeof(netif); strncpy(currif->name, name, ifnam_size); currif->name[ifnam_size - 1] = '\0'; currif->index = getIndex(sock, name); 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) { CHECKED_MALLOC3(currif, netif *, sizeof(netif) + ifnam_size); currif->name = (char *) currif + sizeof(netif); strncpy(currif->name, vname, ifnam_size); currif->name[ifnam_size - 1] = '\0'; currif->index = getIndex(sock, vname); currif->addr = NULL; /* Need to duplicate the addr entry? */ currif->virtual = 1; currif->childs = NULL; currif->next = parent->childs; parent->childs = currif; } CHECKED_MALLOC3(tmpaddr, netaddr *, sizeof(netaddr)+2*addr_size); memcpy(tmpaddr, addrP, sizeof(netaddr)); if (addrP->addr != NULL) { tmpaddr->addr = (struct sockaddr *) ( (char*)tmpaddr + sizeof(netaddr) ) ; memcpy(tmpaddr->addr, addrP->addr, addr_size); } if (addrP->brdcast != NULL) { tmpaddr->brdcast = (struct sockaddr *) ((char *) tmpaddr + sizeof(netaddr)+addr_size); memcpy(tmpaddr->brdcast, addrP->brdcast, addr_size); } tmpaddr->next = currif->addr; currif->addr = tmpaddr; } return ifs; } /* Open socket for further ioct calls * proto is AF_INET/AF_INET6 */ static int openSocket(JNIEnv *env, int proto){ int sock; if ((sock = JVM_Socket(proto, SOCK_DGRAM, 0)) < 0) { /* * If EPROTONOSUPPORT is returned it means we don't have * support for this proto so don't throw an exception. */ if (errno != EPROTONOSUPPORT) { NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "Socket creation failed"); } return -1; } return sock; } /** Linux **/ #ifdef __linux__ /* Open socket for further ioct calls, try v4 socket first and * if it falls return v6 socket */ #ifdef AF_INET6 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ int sock; struct ifreq if2; if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) { if (errno == EPROTONOSUPPORT){ if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); return -1; } } else{ // errno is not NOSUPPORT NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed"); return -1; } } /* Linux starting from 2.6.? kernel allows ioctl call with either IPv4 or IPv6 socket regardless of type of address of an interface */ return sock; } #else static int openSocketWithFallback(JNIEnv *env, const char *ifname){ return openSocket(env,AF_INET); } #endif static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) { struct ifconf ifc; struct ifreq *ifreqP; char *buf; int numifs; unsigned i; /* 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"); return ifs; } CHECKED_MALLOC3(buf,char *, ifc.ifc_len); ifc.ifc_buf = buf; if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) { NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed"); (void) free(buf); return ifs; } /* * Iterate through each interface */ ifreqP = ifc.ifc_req; for (i=0; iifr_name, ifs, (struct sockaddr *) & (ifreqP->ifr_addr), AF_INET, 0); /* * If an exception occurred then free the list */ if ((*env)->ExceptionOccurred(env)) { free(buf); freeif(ifs); return NULL; } } /* * Free socket and buffer */ free(buf); return ifs; } /* * Enumerates and returns all IPv6 interfaces on Linux */ #ifdef AF_INET6 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { FILE *f; char addr6[40], devname[21]; 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 %08x %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, sock, devname, ifs, (struct sockaddr *)&addr, AF_INET6, plen); /* * If an exception occurred then return the list as is. */ if ((*env)->ExceptionOccurred(env)) { fclose(f); return ifs; } } fclose(f); } return ifs; } #endif static int getIndex(int sock, const char *name){ /* * Try to get the interface index * (Not supported on Solaris 2.6 or 7) */ struct ifreq if2; strcpy(if2.ifr_name, name); if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) { return -1; } return if2.ifr_ifindex; } /** * 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, int sock, const char *ifname, struct sockaddr *brdcast_store) { struct sockaddr *ret = NULL; struct ifreq if2; 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) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFFLAGS failed"); return ret; } if (if2.ifr_flags & IFF_BROADCAST) { /* It does, let's retrieve it*/ if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFBRDADDR failed"); return ret; } ret = brdcast_store; memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr)); } 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, int sock, const char *ifname) { unsigned int mask; short ret; struct ifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.ifr_name, ifname); if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFNETMASK failed"); return -1; } mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr); ret = 0; while (mask) { mask <<= 1; ret++; } return ret; } /** * 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. */ static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf) { static struct ifreq ifr; int i; strcpy(ifr.ifr_name, ifname); if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFHWADDR failed"); return -1; } memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN); /* * All bytes to 0 means no hardware address. */ for (i = 0; i < IFHWADDRLEN; i++) { if (buf[i] != 0) return IFHWADDRLEN; } return -1; } static int getMTU(JNIEnv *env, int sock, const char *ifname) { struct ifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.ifr_name, ifname); if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFMTU failed"); return -1; } return if2.ifr_mtu; } static int getFlags(int sock, const char *ifname, int *flags) { struct ifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.ifr_name, ifname); if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0){ return -1; } if (sizeof(if2.ifr_flags) == sizeof(short)) { *flags = (if2.ifr_flags & 0xffff); } else { *flags = if2.ifr_flags; } return 0; } #endif /** Solaris **/ #ifdef __solaris__ /* Open socket for further ioct calls, try v4 socket first and * if it falls return v6 socket */ #ifdef AF_INET6 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ int sock, alreadyV6 = 0; struct lifreq if2; if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) { if (errno == EPROTONOSUPPORT){ if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); return -1; } alreadyV6=1; } else{ // errno is not NOSUPPORT NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed"); return -1; } } /** * Solaris requires that we have an IPv6 socket to query an * interface without an IPv4 address - check it here. * POSIX 1 require the kernel to return ENOTTY if the call is * inappropriate for a device e.g. the NETMASK for a device having IPv6 * only address but not all devices follow the standard so * fall back on any error. It's not an ecologically friendly gesture * but more reliable. */ if (! alreadyV6 ){ memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.lifr_name, ifname); if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) { close(sock); if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); return -1; } } } return sock; } #else static int openSocketWithFallback(JNIEnv *env, const char *ifname){ return openSocket(env,AF_INET); } #endif /* * Enumerates and returns all IPv4 interfaces * (linux verision) */ static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) { return enumIPvXInterfaces(env,sock, ifs, AF_INET); } #ifdef AF_INET6 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { return enumIPvXInterfaces(env,sock, ifs, AF_INET6); } #endif /* Enumerates and returns all interfaces on Solaris use the same code for IPv4 and IPv6 */ static netif *enumIPvXInterfaces(JNIEnv *env, int sock, netif *ifs, int family) { struct lifconf ifc; struct lifreq *ifr; int n; char *buf; struct lifnum numifs; unsigned bufsize; /* * Get the interface count */ numifs.lifn_family = family; numifs.lifn_flags = 0; if (ioctl(sock, SIOCGLIFNUM, (char *)&numifs) < 0) { NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGLIFNUM failed"); return ifs; } /* * Enumerate the interface configurations */ bufsize = numifs.lifn_count * sizeof (struct lifreq); CHECKED_MALLOC3(buf, char *, bufsize); ifc.lifc_family = family; 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"); free(buf); return ifs; } /* * Iterate through each interface */ ifr = ifc.lifc_req; for (n=0; nlifr_addr.ss_family != family) { continue; } #ifdef AF_INET6 if (ifr->lifr_addr.ss_family == AF_INET6) { struct sockaddr_in6 *s6= (struct sockaddr_in6 *)&(ifr->lifr_addr); s6->sin6_scope_id = getIndex(sock, ifr->lifr_name); } #endif /* add to the list */ ifs = addif(env, sock,ifr->lifr_name, ifs, (struct sockaddr *)&(ifr->lifr_addr),family, (short) ifr->lifr_addrlen); /* * If an exception occurred we return immediately */ if ((*env)->ExceptionOccurred(env)) { free(buf); return ifs; } } free(buf); return ifs; } static int getIndex(int sock, const char *name){ /* * Try to get the interface index * (Not supported on Solaris 2.6 or 7) */ struct lifreq if2; strcpy(if2.lifr_name, name); if (ioctl(sock, SIOCGLIFINDEX, (char *)&if2) < 0) { return -1; } return if2.lifr_index; } /** * 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, int sock, const char *ifname, struct sockaddr *brdcast_store) { struct sockaddr *ret = NULL; struct lifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.lifr_name, ifname); /* Let's make sure the interface does have a broadcast address */ if (ioctl(sock, SIOCGLIFFLAGS, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFFLAGS failed"); return ret; } if (if2.lifr_flags & IFF_BROADCAST) { /* It does, let's retrieve it*/ if (ioctl(sock, SIOCGLIFBRDADDR, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFBRDADDR failed"); return ret; } ret = brdcast_store; memcpy(ret, &if2.lifr_broadaddr, sizeof(struct sockaddr)); } 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, int sock, const char *ifname) { unsigned int mask; short ret; struct lifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.lifr_name, ifname); if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFNETMASK failed"); return -1; } mask = ntohl(((struct sockaddr_in*)&(if2.lifr_addr))->sin_addr.s_addr); ret = 0; while (mask) { mask <<= 1; ret++; } return ret; } #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)) < 0) { /* * 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; } /** * 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. */ static int getMacAddress(JNIEnv *env, int sock, const char *ifname, const struct in_addr* addr, unsigned char *buf) { struct arpreq arpreq; struct sockaddr_in* sin; struct sockaddr_in ipAddr; int len, i; struct lifreq lif; /* First, try the new (S11) SIOCGLIFHWADDR ioctl(). If that fails * try the old way. */ memset(&lif, 0, sizeof(lif)); strlcpy(lif.lifr_name, ifname, sizeof(lif.lifr_name)); if (ioctl(sock, SIOCGLIFHWADDR, &lif) != -1) { struct sockaddr_dl *sp; sp = (struct sockaddr_dl *)&lif.lifr_addr; memcpy(buf, &sp->sdl_data[0], sp->sdl_alen); return sp->sdl_alen; } /** * 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) { /*DLPI failed - trying to do arp lookup*/ if (addr == NULL) { /** * No IPv4 address for that interface, so can't do an ARP lookup. */ return -1; } len = 6; //??? 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; if (ioctl(sock, SIOCGARP, &arpreq) < 0) { return -1; } memcpy(buf, &arpreq.arp_ha.sa_data[0], len ); } /* * All bytes to 0 means no hardware address. */ for (i = 0; i < len; i++) { if (buf[i] != 0) return len; } return -1; } static int getMTU(JNIEnv *env, int sock, const char *ifname) { struct lifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.lifr_name, ifname); if (ioctl(sock, SIOCGLIFMTU, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFMTU failed"); return -1; } return if2.lifr_mtu; } static int getFlags(int sock, const char *ifname, int *flags) { struct lifreq lifr; memset((caddr_t)&lifr, 0, sizeof(lifr)); strcpy((caddr_t)&(lifr.lifr_name), ifname); if (ioctl(sock, SIOCGLIFFLAGS, (char *)&lifr) < 0) { return -1; } *flags = lifr.lifr_flags; return 0; } #endif /** BSD **/ #ifdef _ALLBSD_SOURCE /* Open socket for further ioct calls, try v4 socket first and * if it falls return v6 socket */ #ifdef AF_INET6 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ int sock; struct ifreq if2; if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) { if (errno == EPROTONOSUPPORT){ if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); return -1; } } else{ // errno is not NOSUPPORT NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed"); return -1; } } return sock; } #else static int openSocketWithFallback(JNIEnv *env, const char *ifname){ return openSocket(env,AF_INET); } #endif /* * Enumerates and returns all IPv4 interfaces */ static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) { struct ifaddrs *ifa, *origifa; if (getifaddrs(&origifa) != 0) { NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "getifaddrs() function failed"); return ifs; } for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) { /* * Skip non-AF_INET entries. */ if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET) continue; /* * Add to the list. */ ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr, AF_INET, 0); /* * If an exception occurred then free the list. */ if ((*env)->ExceptionOccurred(env)) { freeifaddrs(origifa); freeif(ifs); return NULL; } } /* * Free socket and buffer */ freeifaddrs(origifa); return ifs; } /* * Enumerates and returns all IPv6 interfaces on Linux */ #ifdef AF_INET6 /* * Determines the prefix on BSD for IPv6 interfaces. */ static int prefix(void *val, int size) { u_char *name = (u_char *)val; int byte, bit, plen = 0; for (byte = 0; byte < size; byte++, plen += 8) if (name[byte] != 0xff) break; if (byte == size) return (plen); for (bit = 7; bit != 0; bit--, plen++) if (!(name[byte] & (1 << bit))) break; for (; bit != 0; bit--) if (name[byte] & (1 << bit)) return (0); byte++; for (; byte < size; byte++) if (name[byte]) return (0); return (plen); } /* * Enumerates and returns all IPv6 interfaces on BSD */ static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { struct ifaddrs *ifa, *origifa; struct sockaddr_in6 *sin6; struct in6_ifreq ifr6; if (getifaddrs(&origifa) != 0) { NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "getifaddrs() function failed"); return ifs; } for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) { /* * Skip non-AF_INET6 entries. */ if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET6) continue; memset(&ifr6, 0, sizeof(ifr6)); strlcpy(ifr6.ifr_name, ifa->ifa_name, sizeof(ifr6.ifr_name)); memcpy(&ifr6.ifr_addr, ifa->ifa_addr, MIN(sizeof(ifr6.ifr_addr), ifa->ifa_addr->sa_len)); if (ioctl(sock, SIOCGIFNETMASK_IN6, (caddr_t)&ifr6) < 0) { NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFNETMASK_IN6 failed"); freeifaddrs(origifa); freeif(ifs); return NULL; } /* Add to the list. */ sin6 = (struct sockaddr_in6 *)&ifr6.ifr_addr; ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr, AF_INET6, prefix(&sin6->sin6_addr, sizeof(struct in6_addr))); /* If an exception occurred then free the list. */ if ((*env)->ExceptionOccurred(env)) { freeifaddrs(origifa); freeif(ifs); return NULL; } } /* * Free socket and ifaddrs buffer */ freeifaddrs(origifa); return ifs; } #endif static int getIndex(int sock, const char *name){ #ifdef __FreeBSD__ /* * Try to get the interface index * (Not supported on Solaris 2.6 or 7) */ struct ifreq if2; strcpy(if2.ifr_name, name); if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) { return -1; } return if2.ifr_index; #else /* * Try to get the interface index using BSD specific if_nametoindex */ int index = if_nametoindex(name); return (index == 0) ? -1 : index; #endif } /** * 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, int sock, const char *ifname, struct sockaddr *brdcast_store) { struct sockaddr *ret = NULL; struct ifreq if2; 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) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFFLAGS failed"); return ret; } if (if2.ifr_flags & IFF_BROADCAST) { /* It does, let's retrieve it*/ if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFBRDADDR failed"); return ret; } ret = brdcast_store; memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr)); } 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, int sock, const char *ifname) { unsigned int mask; short ret; struct ifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.ifr_name, ifname); if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFNETMASK failed"); return -1; } mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr); ret = 0; while (mask) { mask <<= 1; ret++; } return ret; } /** * 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. */ static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf) { struct ifaddrs *ifa0, *ifa; struct sockaddr *saddr; int i; /* Grab the interface list */ if (!getifaddrs(&ifa0)) { /* Cycle through the interfaces */ for (i = 0, ifa = ifa0; ifa != NULL; ifa = ifa->ifa_next, i++) { saddr = ifa->ifa_addr; /* Link layer contains the MAC address */ if (saddr->sa_family == AF_LINK && !strcmp(ifname, ifa->ifa_name)) { struct sockaddr_dl *sadl = (struct sockaddr_dl *) saddr; /* Check the address is the correct length */ if (sadl->sdl_alen == ETHER_ADDR_LEN) { memcpy(buf, (sadl->sdl_data + sadl->sdl_nlen), ETHER_ADDR_LEN); freeifaddrs(ifa0); return ETHER_ADDR_LEN; } } } freeifaddrs(ifa0); } return -1; } static int getMTU(JNIEnv *env, int sock, const char *ifname) { struct ifreq if2; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.ifr_name, ifname); if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) { NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFMTU failed"); return -1; } return if2.ifr_mtu; } static int getFlags(int sock, const char *ifname, int *flags) { struct ifreq if2; int ret = -1; memset((char *) &if2, 0, sizeof(if2)); strcpy(if2.ifr_name, ifname); if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0){ return -1; } if (sizeof(if2.ifr_flags) == sizeof(short)) { *flags = (if2.ifr_flags & 0xffff); } else { *flags = if2.ifr_flags; } return 0; } #endif