| /* |
| * Copyright (c) 2000, 2018, 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 <malloc.h> |
| |
| #include "net_util.h" |
| |
| #include "java_net_InetAddress.h" |
| #include "java_net_Inet4AddressImpl.h" |
| #include "java_net_Inet6AddressImpl.h" |
| |
| /* |
| * Inet6AddressImpl |
| */ |
| |
| /* |
| * Class: java_net_Inet6AddressImpl |
| * Method: getLocalHostName |
| * Signature: ()Ljava/lang/String; |
| */ |
| JNIEXPORT jstring JNICALL |
| Java_java_net_Inet6AddressImpl_getLocalHostName(JNIEnv *env, jobject this) { |
| char hostname[256]; |
| |
| if (gethostname(hostname, sizeof(hostname)) == -1) { |
| strcpy(hostname, "localhost"); |
| } |
| return JNU_NewStringPlatform(env, hostname); |
| } |
| |
| /* |
| * Class: java_net_Inet6AddressImpl |
| * Method: lookupAllHostAddr |
| * Signature: (Ljava/lang/String;)[[B |
| */ |
| JNIEXPORT jobjectArray JNICALL |
| Java_java_net_Inet6AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this, |
| jstring host) { |
| jobjectArray ret = NULL; |
| const char *hostname; |
| int error = 0; |
| struct addrinfo hints, *res = NULL, *resNew = NULL, *last = NULL, |
| *iterator; |
| |
| initInetAddressIDs(env); |
| JNU_CHECK_EXCEPTION_RETURN(env, NULL); |
| |
| if (IS_NULL(host)) { |
| JNU_ThrowNullPointerException(env, "host argument is null"); |
| return NULL; |
| } |
| hostname = JNU_GetStringPlatformChars(env, host, JNI_FALSE); |
| CHECK_NULL_RETURN(hostname, NULL); |
| |
| // try once, with our static buffer |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_flags = AI_CANONNAME; |
| hints.ai_family = AF_UNSPEC; |
| |
| error = getaddrinfo(hostname, NULL, &hints, &res); |
| |
| if (error) { |
| // report error |
| NET_ThrowByNameWithLastError(env, "java/net/UnknownHostException", |
| hostname); |
| goto cleanupAndReturn; |
| } else { |
| int i = 0, inetCount = 0, inet6Count = 0, inetIndex = 0, |
| inet6Index = 0, originalIndex = 0; |
| int addressPreference = |
| (*env)->GetStaticIntField(env, ia_class, ia_preferIPv6AddressID); |
| iterator = res; |
| while (iterator != NULL) { |
| // skip duplicates |
| int skip = 0; |
| struct addrinfo *iteratorNew = resNew; |
| while (iteratorNew != NULL) { |
| if (iterator->ai_family == iteratorNew->ai_family && |
| iterator->ai_addrlen == iteratorNew->ai_addrlen) { |
| if (iteratorNew->ai_family == AF_INET) { /* AF_INET */ |
| struct sockaddr_in *addr1, *addr2; |
| addr1 = (struct sockaddr_in *)iterator->ai_addr; |
| addr2 = (struct sockaddr_in *)iteratorNew->ai_addr; |
| if (addr1->sin_addr.s_addr == addr2->sin_addr.s_addr) { |
| skip = 1; |
| break; |
| } |
| } else { |
| int t; |
| struct sockaddr_in6 *addr1, *addr2; |
| addr1 = (struct sockaddr_in6 *)iterator->ai_addr; |
| addr2 = (struct sockaddr_in6 *)iteratorNew->ai_addr; |
| |
| for (t = 0; t < 16; t++) { |
| if (addr1->sin6_addr.s6_addr[t] != |
| addr2->sin6_addr.s6_addr[t]) { |
| break; |
| } |
| } |
| if (t < 16) { |
| iteratorNew = iteratorNew->ai_next; |
| continue; |
| } else { |
| skip = 1; |
| break; |
| } |
| } |
| } else if (iterator->ai_family != AF_INET && |
| iterator->ai_family != AF_INET6) { |
| // we can't handle other family types |
| skip = 1; |
| break; |
| } |
| iteratorNew = iteratorNew->ai_next; |
| } |
| |
| if (!skip) { |
| struct addrinfo *next |
| = (struct addrinfo *)malloc(sizeof(struct addrinfo)); |
| if (!next) { |
| JNU_ThrowOutOfMemoryError(env, "Native heap allocation failed"); |
| ret = NULL; |
| goto cleanupAndReturn; |
| } |
| memcpy(next, iterator, sizeof(struct addrinfo)); |
| next->ai_next = NULL; |
| if (resNew == NULL) { |
| resNew = next; |
| } else { |
| last->ai_next = next; |
| } |
| last = next; |
| i++; |
| if (iterator->ai_family == AF_INET) { |
| inetCount++; |
| } else if (iterator->ai_family == AF_INET6) { |
| inet6Count++; |
| } |
| } |
| iterator = iterator->ai_next; |
| } |
| |
| // allocate array - at this point i contains the number of addresses |
| ret = (*env)->NewObjectArray(env, i, ia_class, NULL); |
| if (IS_NULL(ret)) { |
| /* we may have memory to free at the end of this */ |
| goto cleanupAndReturn; |
| } |
| |
| if (addressPreference == java_net_InetAddress_PREFER_IPV6_VALUE) { |
| inetIndex = inet6Count; |
| inet6Index = 0; |
| } else if (addressPreference == java_net_InetAddress_PREFER_IPV4_VALUE) { |
| inetIndex = 0; |
| inet6Index = inetCount; |
| } else if (addressPreference == java_net_InetAddress_PREFER_SYSTEM_VALUE) { |
| inetIndex = inet6Index = originalIndex = 0; |
| } |
| |
| iterator = resNew; |
| while (iterator != NULL) { |
| if (iterator->ai_family == AF_INET) { |
| jobject iaObj = (*env)->NewObject(env, ia4_class, ia4_ctrID); |
| if (IS_NULL(iaObj)) { |
| ret = NULL; |
| goto cleanupAndReturn; |
| } |
| setInetAddress_addr(env, iaObj, ntohl(((struct sockaddr_in*)iterator->ai_addr)->sin_addr.s_addr)); |
| if ((*env)->ExceptionCheck(env)) |
| goto cleanupAndReturn; |
| setInetAddress_hostName(env, iaObj, host); |
| if ((*env)->ExceptionCheck(env)) |
| goto cleanupAndReturn; |
| (*env)->SetObjectArrayElement(env, ret, (inetIndex | originalIndex), iaObj); |
| inetIndex++; |
| } else if (iterator->ai_family == AF_INET6) { |
| jint scope = 0; |
| jboolean ret1; |
| jobject iaObj = (*env)->NewObject(env, ia6_class, ia6_ctrID); |
| if (IS_NULL(iaObj)) { |
| ret = NULL; |
| goto cleanupAndReturn; |
| } |
| ret1 = setInet6Address_ipaddress(env, iaObj, (char *)&(((struct sockaddr_in6*)iterator->ai_addr)->sin6_addr)); |
| if (ret1 == JNI_FALSE) { |
| ret = NULL; |
| goto cleanupAndReturn; |
| } |
| scope = ((struct sockaddr_in6 *)iterator->ai_addr)->sin6_scope_id; |
| if (scope != 0) { // zero is default value, no need to set |
| setInet6Address_scopeid(env, iaObj, scope); |
| } |
| setInetAddress_hostName(env, iaObj, host); |
| if ((*env)->ExceptionCheck(env)) |
| goto cleanupAndReturn; |
| (*env)->SetObjectArrayElement(env, ret, (inet6Index | originalIndex), iaObj); |
| inet6Index++; |
| } |
| if (addressPreference == java_net_InetAddress_PREFER_SYSTEM_VALUE) { |
| originalIndex++; |
| inetIndex = inet6Index = 0; |
| } |
| iterator = iterator->ai_next; |
| } |
| } |
| cleanupAndReturn: |
| JNU_ReleaseStringPlatformChars(env, host, hostname); |
| while (resNew != NULL) { |
| last = resNew; |
| resNew = resNew->ai_next; |
| free(last); |
| } |
| if (res != NULL) { |
| freeaddrinfo(res); |
| } |
| return ret; |
| } |
| |
| /* |
| * Class: java_net_Inet6AddressImpl |
| * Method: getHostByAddr |
| * Signature: (I)Ljava/lang/String; |
| * |
| * Theoretically the UnknownHostException could be enriched with gai error |
| * information. But as it is silently ignored anyway, there's no need for this. |
| * It's only important that either a valid hostname is returned or an |
| * UnknownHostException is thrown. |
| */ |
| JNIEXPORT jstring JNICALL |
| Java_java_net_Inet6AddressImpl_getHostByAddr(JNIEnv *env, jobject this, |
| jbyteArray addrArray) { |
| jstring ret = NULL; |
| char host[NI_MAXHOST + 1]; |
| int len = 0; |
| jbyte caddr[16]; |
| SOCKETADDRESS sa; |
| |
| memset((void *)&sa, 0, sizeof(SOCKETADDRESS)); |
| |
| // construct a sockaddr_in structure (AF_INET or AF_INET6) |
| if ((*env)->GetArrayLength(env, addrArray) == 4) { |
| jint addr; |
| (*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); |
| sa.sa4.sin_addr.s_addr = htonl(addr); |
| sa.sa4.sin_family = AF_INET; |
| len = sizeof(struct sockaddr_in); |
| } else { |
| (*env)->GetByteArrayRegion(env, addrArray, 0, 16, caddr); |
| memcpy((void *)&sa.sa6.sin6_addr, caddr, sizeof(struct in6_addr)); |
| sa.sa6.sin6_family = AF_INET6; |
| len = sizeof(struct sockaddr_in6); |
| } |
| |
| if (getnameinfo(&sa.sa, len, host, NI_MAXHOST, NULL, 0, NI_NAMEREQD)) { |
| JNU_ThrowByName(env, "java/net/UnknownHostException", NULL); |
| } else { |
| ret = (*env)->NewStringUTF(env, host); |
| if (ret == NULL) { |
| JNU_ThrowByName(env, "java/net/UnknownHostException", NULL); |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * ping implementation using tcp port 7 (echo) |
| */ |
| static jboolean |
| tcp_ping6(JNIEnv *env, SOCKETADDRESS *sa, SOCKETADDRESS *netif, jint timeout, |
| jint ttl) |
| { |
| jint fd; |
| int connect_rv = -1; |
| WSAEVENT hEvent; |
| |
| // open a TCP socket |
| fd = NET_Socket(AF_INET6, SOCK_STREAM, 0); |
| if (fd == SOCKET_ERROR) { |
| // note: if you run out of fds, you may not be able to load |
| // the exception class, and get a NoClassDefFoundError instead. |
| NET_ThrowNew(env, WSAGetLastError(), "Can't create socket"); |
| return JNI_FALSE; |
| } |
| |
| // set TTL |
| if (ttl > 0) { |
| setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, (const char *)&ttl, sizeof(ttl)); |
| } |
| |
| // A network interface was specified, so let's bind to it. |
| if (netif != NULL) { |
| if (bind(fd, &netif->sa, sizeof(struct sockaddr_in6)) < 0) { |
| NET_ThrowNew(env, WSAGetLastError(), "Can't bind socket to interface"); |
| closesocket(fd); |
| return JNI_FALSE; |
| } |
| } |
| |
| // Make the socket non blocking so we can use select/poll. |
| hEvent = WSACreateEvent(); |
| WSAEventSelect(fd, hEvent, FD_READ|FD_CONNECT|FD_CLOSE); |
| |
| sa->sa6.sin6_port = htons(7); // echo port |
| connect_rv = connect(fd, &sa->sa, sizeof(struct sockaddr_in6)); |
| |
| // connection established or refused immediately, either way it means |
| // we were able to reach the host! |
| if (connect_rv == 0 || WSAGetLastError() == WSAECONNREFUSED) { |
| WSACloseEvent(hEvent); |
| closesocket(fd); |
| return JNI_TRUE; |
| } |
| |
| switch (WSAGetLastError()) { |
| case WSAEHOSTUNREACH: // Host Unreachable |
| case WSAENETUNREACH: // Network Unreachable |
| case WSAENETDOWN: // Network is down |
| case WSAEPFNOSUPPORT: // Protocol Family unsupported |
| WSACloseEvent(hEvent); |
| closesocket(fd); |
| return JNI_FALSE; |
| case WSAEWOULDBLOCK: // this is expected as we'll probably have to wait |
| break; |
| default: |
| NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException", |
| "connect failed"); |
| WSACloseEvent(hEvent); |
| closesocket(fd); |
| return JNI_FALSE; |
| } |
| |
| timeout = NET_Wait(env, fd, NET_WAIT_CONNECT, timeout); |
| if (timeout >= 0) { |
| // connection has been established, check for error condition |
| int optlen = sizeof(connect_rv); |
| if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&connect_rv, |
| &optlen) < 0) |
| { |
| connect_rv = WSAGetLastError(); |
| } |
| if (connect_rv == 0 || connect_rv == WSAECONNREFUSED) { |
| WSACloseEvent(hEvent); |
| closesocket(fd); |
| return JNI_TRUE; |
| } |
| } |
| WSACloseEvent(hEvent); |
| closesocket(fd); |
| return JNI_FALSE; |
| } |
| |
| /** |
| * ping implementation. |
| * Send a ICMP_ECHO_REQUEST packet every second until either the timeout |
| * expires or a answer is received. |
| * Returns true is an ECHO_REPLY is received, otherwise, false. |
| */ |
| static jboolean |
| ping6(JNIEnv *env, HANDLE hIcmpFile, SOCKETADDRESS *sa, |
| SOCKETADDRESS *netif, jint timeout) |
| { |
| DWORD dwRetVal = 0; |
| char SendData[32] = {0}; |
| LPVOID ReplyBuffer = NULL; |
| DWORD ReplySize = 0; |
| IP_OPTION_INFORMATION ipInfo = {255, 0, 0, 0, NULL}; |
| SOCKETADDRESS dftNetif; |
| |
| ReplySize = sizeof(ICMPV6_ECHO_REPLY) + sizeof(SendData); |
| ReplyBuffer = (VOID *)malloc(ReplySize); |
| if (ReplyBuffer == NULL) { |
| IcmpCloseHandle(hIcmpFile); |
| NET_ThrowNew(env, -1, "Unable to allocate memory"); |
| return JNI_FALSE; |
| } |
| |
| //define local source information |
| if (netif == NULL) { |
| dftNetif.sa6.sin6_addr = in6addr_any; |
| dftNetif.sa6.sin6_family = AF_INET6; |
| dftNetif.sa6.sin6_flowinfo = 0; |
| dftNetif.sa6.sin6_port = 0; |
| netif = &dftNetif; |
| } |
| |
| dwRetVal = Icmp6SendEcho2(hIcmpFile, // HANDLE IcmpHandle, |
| NULL, // HANDLE Event, |
| NULL, // PIO_APC_ROUTINE ApcRoutine, |
| NULL, // PVOID ApcContext, |
| &netif->sa6, // struct sockaddr_in6 *SourceAddress, |
| &sa->sa6, // struct sockaddr_in6 *DestinationAddress, |
| SendData, // LPVOID RequestData, |
| sizeof(SendData), // WORD RequestSize, |
| &ipInfo, // PIP_OPTION_INFORMATION RequestOptions, |
| ReplyBuffer, // LPVOID ReplyBuffer, |
| ReplySize, // DWORD ReplySize, |
| timeout); // DWORD Timeout |
| |
| free(ReplyBuffer); |
| IcmpCloseHandle(hIcmpFile); |
| |
| if (dwRetVal == 0) { // if the call failed |
| return JNI_FALSE; |
| } else { |
| return JNI_TRUE; |
| } |
| } |
| |
| /* |
| * Class: java_net_Inet6AddressImpl |
| * Method: isReachable0 |
| * Signature: ([bII[bI)Z |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_java_net_Inet6AddressImpl_isReachable0(JNIEnv *env, jobject this, |
| jbyteArray addrArray, jint scope, |
| jint timeout, jbyteArray ifArray, |
| jint ttl, jint if_scope) |
| { |
| jbyte caddr[16]; |
| jint sz; |
| SOCKETADDRESS sa, inf, *netif = NULL; |
| HANDLE hIcmpFile; |
| |
| // If IPv6 is not enabled, then we can't reach an IPv6 address, can we? |
| // Actually, we probably shouldn't even get here. |
| if (!ipv6_available()) { |
| return JNI_FALSE; |
| } |
| |
| // If it's an IPv4 address, ICMP won't work with IPv4 mapped address, |
| // therefore, let's delegate to the Inet4Address method. |
| sz = (*env)->GetArrayLength(env, addrArray); |
| if (sz == 4) { |
| return Java_java_net_Inet4AddressImpl_isReachable0(env, this, |
| addrArray, timeout, |
| ifArray, ttl); |
| } |
| |
| // load address to SOCKETADDRESS |
| memset((char *)caddr, 0, 16); |
| (*env)->GetByteArrayRegion(env, addrArray, 0, 16, caddr); |
| memset((char *)&sa, 0, sizeof(SOCKETADDRESS)); |
| memcpy((void *)&sa.sa6.sin6_addr, caddr, sizeof(struct in6_addr)); |
| sa.sa6.sin6_family = AF_INET6; |
| if (scope > 0) { |
| sa.sa6.sin6_scope_id = scope; |
| } |
| |
| // load network interface address to SOCKETADDRESS, if specified |
| if (!(IS_NULL(ifArray))) { |
| memset((char *)caddr, 0, 16); |
| (*env)->GetByteArrayRegion(env, ifArray, 0, 16, caddr); |
| memset((char *)&inf, 0, sizeof(SOCKETADDRESS)); |
| memcpy((void *)&inf.sa6.sin6_addr, caddr, sizeof(struct in6_addr)); |
| inf.sa6.sin6_family = AF_INET6; |
| inf.sa6.sin6_scope_id = if_scope; |
| netif = &inf; |
| } |
| |
| // Let's try to create an ICMP handle. |
| hIcmpFile = Icmp6CreateFile(); |
| if (hIcmpFile == INVALID_HANDLE_VALUE) { |
| int err = WSAGetLastError(); |
| if (err == ERROR_ACCESS_DENIED) { |
| // fall back to TCP echo if access is denied to ICMP |
| return tcp_ping6(env, &sa, netif, timeout, ttl); |
| } else { |
| NET_ThrowNew(env, err, "Unable to create ICMP file handle"); |
| return JNI_FALSE; |
| } |
| } else { |
| // It didn't fail, so we can use ICMP. |
| return ping6(env, hIcmpFile, &sa, netif, timeout); |
| } |
| } |
