--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/native/java/net/Inet6AddressImpl.c Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,700 @@
+/*
+ * 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 <windows.h>
+#include <winsock2.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <sys/types.h>
+
+#include "java_net_InetAddress.h"
+#include "java_net_Inet4AddressImpl.h"
+#include "java_net_Inet6AddressImpl.h"
+#include "net_util.h"
+#include "icmp.h"
+
+#ifdef WIN32
+#ifndef _WIN64
+
+/* Retain this code a little longer to support building in
+ * old environments. _MSC_VER is defined as:
+ * 1200 for MSVC++ 6.0
+ * 1310 for Vc7
+ */
+#if defined(_MSC_VER) && _MSC_VER < 1310
+#define sockaddr_in6 SOCKADDR_IN6
+#endif
+#endif
+#define uint32_t UINT32
+#endif
+
+/*
+ * 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);
+}
+
+static jclass ni_iacls;
+static jclass ni_ia4cls;
+static jclass ni_ia6cls;
+static jmethodID ni_ia4ctrID;
+static jmethodID ni_ia6ctrID;
+static jfieldID ni_iaaddressID;
+static jfieldID ni_iahostID;
+static jfieldID ni_iafamilyID;
+static jfieldID ni_ia6ipaddressID;
+static int initialized = 0;
+
+JNIEXPORT jobjectArray JNICALL
+Java_java_net_Inet6AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this,
+ jstring host) {
+ const char *hostname;
+ jobject name;
+ jobjectArray ret = 0;
+ int retLen = 0;
+ jboolean preferIPv6Address;
+
+ int error=0;
+ struct addrinfo hints, *res, *resNew = NULL;
+
+ if (!initialized) {
+ 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_ia4ctrID = (*env)->GetMethodID(env, ni_ia4cls, "<init>", "()V");
+ ni_ia6ctrID = (*env)->GetMethodID(env, ni_ia6cls, "<init>", "()V");
+ ni_iaaddressID = (*env)->GetFieldID(env, ni_iacls, "address", "I");
+ ni_iafamilyID = (*env)->GetFieldID(env, ni_iacls, "family", "I");
+ ni_iahostID = (*env)->GetFieldID(env, ni_iacls, "hostName", "Ljava/lang/String;");
+ ni_ia6ipaddressID = (*env)->GetFieldID(env, ni_ia6cls, "ipaddress", "[B");
+ initialized = 1;
+ }
+ if (IS_NULL(host)) {
+ JNU_ThrowNullPointerException(env, "host is null");
+ return 0;
+ }
+ hostname = JNU_GetStringPlatformChars(env, host, JNI_FALSE);
+ CHECK_NULL_RETURN(hostname, NULL);
+
+ if (NET_addrtransAvailable()) {
+ static jfieldID ia_preferIPv6AddressID;
+ if (ia_preferIPv6AddressID == NULL) {
+ jclass c = (*env)->FindClass(env,"java/net/InetAddress");
+ if (c) {
+ ia_preferIPv6AddressID =
+ (*env)->GetStaticFieldID(env, c, "preferIPv6Address", "Z");
+ }
+ if (ia_preferIPv6AddressID == NULL) {
+ JNU_ReleaseStringPlatformChars(env, host, hostname);
+ return NULL;
+ }
+ }
+ /* get the address preference */
+ preferIPv6Address
+ = (*env)->GetStaticBooleanField(env, ia_class, ia_preferIPv6AddressID);
+
+ /* Try once, with our static buffer. */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_family = AF_UNSPEC;
+
+ error = (*getaddrinfo_ptr)(hostname, NULL, &hints, &res);
+
+ if (error) {
+ /* report error */
+ JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException",
+ (char *)hostname);
+ JNU_ReleaseStringPlatformChars(env, host, hostname);
+ return NULL;
+ } else {
+ int i = 0;
+ int inetCount = 0, inet6Count = 0, inetIndex, inet6Index;
+ struct addrinfo *itr, *last, *iterator = res;
+ while (iterator != NULL) {
+ int skip = 0;
+ itr = resNew;
+ while (itr != NULL) {
+ if (iterator->ai_family == itr->ai_family &&
+ iterator->ai_addrlen == itr->ai_addrlen) {
+ if (itr->ai_family == AF_INET) { /* AF_INET */
+ struct sockaddr_in *addr1, *addr2;
+ addr1 = (struct sockaddr_in *)iterator->ai_addr;
+ addr2 = (struct sockaddr_in *)itr->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 *)itr->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) {
+ itr = itr->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;
+ }
+ itr = itr->ai_next;
+ }
+
+ if (!skip) {
+ struct addrinfo *next
+ = (struct addrinfo*) malloc(sizeof(struct addrinfo));
+ if (!next) {
+ JNU_ThrowOutOfMemoryError(env, "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;
+ }
+ retLen = i;
+ iterator = resNew;
+ i = 0;
+ ret = (*env)->NewObjectArray(env, retLen, ni_iacls, NULL);
+
+ if (IS_NULL(ret)) {
+ /* we may have memory to free at the end of this */
+ goto cleanupAndReturn;
+ }
+
+ if (preferIPv6Address) {
+ inetIndex = inet6Count;
+ inet6Index = 0;
+ } else {
+ inetIndex = 0;
+ inet6Index = inetCount;
+ }
+
+ name = (*env)->NewStringUTF(env, hostname);
+ if (IS_NULL(name)) {
+ ret = NULL;
+ goto cleanupAndReturn;
+ }
+
+ while (iterator != NULL) {
+ if (iterator->ai_family == AF_INET) {
+ jobject iaObj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID);
+ if (IS_NULL(iaObj)) {
+ ret = NULL;
+ goto cleanupAndReturn;
+ }
+ (*env)->SetIntField(env, iaObj, ni_iaaddressID,
+ ntohl(((struct sockaddr_in*)iterator->ai_addr)->sin_addr.s_addr));
+ (*env)->SetObjectField(env, iaObj, ni_iahostID, name);
+ (*env)->SetObjectArrayElement(env, ret, inetIndex, iaObj);
+ inetIndex ++;
+ } else if (iterator->ai_family == AF_INET6) {
+ jint scope = 0;
+ jbyteArray ipaddress;
+ jobject iaObj = (*env)->NewObject(env, ni_ia6cls, ni_ia6ctrID);
+ if (IS_NULL(iaObj)) {
+ ret = NULL;
+ goto cleanupAndReturn;
+ }
+ ipaddress = (*env)->NewByteArray(env, 16);
+ if (IS_NULL(ipaddress)) {
+ ret = NULL;
+ goto cleanupAndReturn;
+ }
+ (*env)->SetByteArrayRegion(env, ipaddress, 0, 16,
+ (jbyte *)&(((struct sockaddr_in6*)iterator->ai_addr)->sin6_addr));
+ scope = ((struct sockaddr_in6*)iterator->ai_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, ni_ia6ipaddressID, ipaddress);
+ (*env)->SetObjectField(env, iaObj, ni_iahostID, name);
+ (*env)->SetObjectArrayElement(env, ret, inet6Index, iaObj);
+ inet6Index ++;
+ }
+ iterator = iterator->ai_next;
+ }
+ }
+ }
+
+cleanupAndReturn:
+ {
+ struct addrinfo *iterator, *tmp;
+ iterator = resNew;
+ while (iterator != NULL) {
+ tmp = iterator;
+ iterator = iterator->ai_next;
+ free(tmp);
+ }
+ JNU_ReleaseStringPlatformChars(env, host, hostname);
+ }
+
+ if (NET_addrtransAvailable())
+ (*freeaddrinfo_ptr)(res);
+
+ return ret;
+}
+
+/*
+ * Class: java_net_Inet6AddressImpl
+ * Method: getHostByAddr
+ * Signature: (I)Ljava/lang/String;
+ */
+JNIEXPORT jstring JNICALL
+Java_java_net_Inet6AddressImpl_getHostByAddr(JNIEnv *env, jobject this,
+ jbyteArray addrArray) {
+ jstring ret = NULL;
+
+ char host[NI_MAXHOST+1];
+ jfieldID fid;
+ int error = 0;
+ jint family;
+ struct sockaddr *him ;
+ int len = 0;
+ jbyte caddr[16];
+
+ if (NET_addrtransAvailable()) {
+ struct sockaddr_in him4;
+ struct sockaddr_in6 him6;
+ struct sockaddr *sa;
+
+ /*
+ * For IPv4 addresses construct a sockaddr_in structure.
+ */
+ 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);
+ memset((char *) &him4, 0, sizeof(him4));
+ him4.sin_addr.s_addr = (uint32_t) htonl(addr);
+ him4.sin_family = AF_INET;
+ sa = (struct sockaddr *) &him4;
+ len = sizeof(him4);
+ } else {
+ /*
+ * For IPv6 address construct a sockaddr_in6 structure.
+ */
+ (*env)->GetByteArrayRegion(env, addrArray, 0, 16, caddr);
+ memset((char *) &him6, 0, sizeof(him6));
+ memcpy((void *)&(him6.sin6_addr), caddr, sizeof(struct in6_addr) );
+ him6.sin6_family = AF_INET6;
+ sa = (struct sockaddr *) &him6 ;
+ len = sizeof(him6) ;
+ }
+
+ error = (*getnameinfo_ptr)(sa, len, host, NI_MAXHOST, NULL, 0,
+ NI_NAMEREQD);
+
+ if (!error) {
+ ret = (*env)->NewStringUTF(env, host);
+ }
+ }
+
+ if (ret == NULL) {
+ JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", NULL);
+ }
+
+ return ret;
+}
+
+#ifdef AF_INET6
+
+
+/**
+ * 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, jint fd, struct SOCKADDR_IN6* him, jint timeout,
+ struct SOCKADDR_IN6* netif, jint ttl) {
+ jint size;
+ jint n, len, hlen1, icmplen, i;
+ char sendbuf[1500];
+ char auxbuf[1500];
+ unsigned char recvbuf[1500];
+ struct icmp6_hdr *icmp6;
+ struct SOCKADDR_IN6 sa_recv;
+ unsigned short pid, seq;
+ int read_rv = 0;
+ WSAEVENT hEvent;
+ struct ip6_pseudo_hdr *pseudo_ip6;
+ int timestamp;
+ int tmout2;
+
+ /* Initialize the sequence number to a suitable random number and
+ shift right one place to allow sufficient room for increamenting. */
+ seq = ((unsigned short)rand()) >> 1;
+
+ /* icmp_id is a 16 bit data type, therefore down cast the pid */
+ pid = (unsigned short) getpid();
+
+ size = 60*1024;
+ setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (const char *)&size, sizeof(size));
+ /**
+ * A TTL was specified, let's set the socket option.
+ */
+ if (ttl > 0) {
+ setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, (const char *) &ttl, sizeof(ttl));
+ }
+
+ /**
+ * A network interface was specified, let's bind to it.
+ */
+ if (netif != NULL) {
+ if (NET_Bind(fd, (struct sockaddr*)netif, 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
+ */
+ hEvent = WSACreateEvent();
+ WSAEventSelect(fd, hEvent, FD_READ|FD_CONNECT|FD_CLOSE);
+
+ /**
+ * send 1 ICMP REQUEST every second until either we get a valid reply
+ * or the timeout expired.
+ */
+ do {
+ /* let's tag the ECHO packet with our pid so we can identify it */
+ timestamp = GetCurrentTime();
+ memset(sendbuf, 0, 1500);
+ icmp6 = (struct icmp6_hdr *) sendbuf;
+ icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
+ icmp6->icmp6_code = 0;
+ icmp6->icmp6_id = htons(pid);
+ icmp6->icmp6_seq = htons(seq);
+ icmp6->icmp6_cksum = 0;
+ memcpy((icmp6 + 1), ×tamp, sizeof(int));
+ if (netif != NULL) {
+ memset(auxbuf, 0, 1500);
+ pseudo_ip6 = (struct ip6_pseudo_hdr*) auxbuf;
+ memcpy(&pseudo_ip6->ip6_src, &netif->sin6_addr, sizeof(struct in6_addr));
+ memcpy(&pseudo_ip6->ip6_dst, &him->sin6_addr, sizeof(struct in6_addr));
+ pseudo_ip6->ip6_plen= htonl( 64 );
+ pseudo_ip6->ip6_nxt = htonl( IPPROTO_ICMPV6 );
+ memcpy(auxbuf + sizeof(struct ip6_pseudo_hdr), icmp6, 64);
+ /**
+ * We shouldn't have to do that as computing the checksum is supposed
+ * to be done by the IPv6 stack. Unfortunately windows, here too, is
+ * uterly broken, or non compliant, so let's do it.
+ * Problem is to compute the checksum I need to know the source address
+ * which happens only if I know the interface to be used...
+ */
+ icmp6->icmp6_cksum = in_cksum((u_short *)pseudo_ip6, sizeof(struct ip6_pseudo_hdr) + 64);
+ }
+
+ /**
+ * Ping!
+ */
+ n = sendto(fd, sendbuf, 64, 0, (struct sockaddr*) him, sizeof(struct sockaddr_in6));
+ if (n < 0 && (WSAGetLastError() == WSAEINTR || WSAGetLastError() == WSAEADDRNOTAVAIL)) {
+ // Happens when using a "tunnel interface" for instance.
+ // Or trying to send a packet on a different scope.
+ closesocket(fd);
+ WSACloseEvent(hEvent);
+ return JNI_FALSE;
+ }
+ if (n < 0 && WSAGetLastError() != WSAEWOULDBLOCK) {
+ NET_ThrowNew(env, WSAGetLastError(), "Can't send ICMP packet");
+ closesocket(fd);
+ WSACloseEvent(hEvent);
+ return JNI_FALSE;
+ }
+
+ tmout2 = timeout > 1000 ? 1000 : timeout;
+ do {
+ tmout2 = NET_Wait(env, fd, NET_WAIT_READ, tmout2);
+
+ if (tmout2 >= 0) {
+ len = sizeof(sa_recv);
+ memset(recvbuf, 0, 1500);
+ /**
+ * For some unknown reason, besides plain stupidity, windows
+ * truncates the first 4 bytes of the icmpv6 header some we can't
+ * check for the ICMP_ECHOREPLY value.
+ * we'll check the other values, though
+ */
+ n = recvfrom(fd, recvbuf + 4, sizeof(recvbuf) - 4, 0, (struct sockaddr*) &sa_recv, &len);
+ icmp6 = (struct icmp6_hdr *) (recvbuf);
+ memcpy(&i, (icmp6 + 1), sizeof(int));
+ /**
+ * Is that the reply we were expecting?
+ */
+ if (n >= 8 && ntohs(icmp6->icmp6_seq) == seq &&
+ ntohs(icmp6->icmp6_id) == pid && i == timestamp) {
+ closesocket(fd);
+ WSACloseEvent(hEvent);
+ return JNI_TRUE;
+ }
+ }
+ } while (tmout2 > 0);
+ timeout -= 1000;
+ seq++;
+ } while (timeout > 0);
+ closesocket(fd);
+ WSACloseEvent(hEvent);
+ return JNI_FALSE;
+}
+#endif /* AF_INET6 */
+
+/*
+ * 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) {
+#ifdef AF_INET6
+ jint addr;
+ jbyte caddr[16];
+ jint fd, sz;
+ struct sockaddr_in6 him6;
+ struct sockaddr_in6* netif = NULL;
+ struct sockaddr_in6 inf6;
+ WSAEVENT hEvent;
+ int len = 0;
+ int connect_rv = -1;
+
+ /*
+ * If IPv6 is not enable, 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);
+ }
+
+ memset((char *) caddr, 0, 16);
+ memset((char *) &him6, 0, sizeof(him6));
+ (*env)->GetByteArrayRegion(env, addrArray, 0, 16, caddr);
+ memcpy((void *)&(him6.sin6_addr), caddr, sizeof(struct in6_addr) );
+ him6.sin6_family = AF_INET6;
+ if (scope > 0) {
+ him6.sin6_scope_id = scope;
+ }
+ len = sizeof(struct sockaddr_in6);
+ /**
+ * A network interface was specified, let's convert the address
+ */
+ if (!(IS_NULL(ifArray))) {
+ memset((char *) caddr, 0, 16);
+ memset((char *) &inf6, 0, sizeof(inf6));
+ (*env)->GetByteArrayRegion(env, ifArray, 0, 16, caddr);
+ memcpy((void *)&(inf6.sin6_addr), caddr, sizeof(struct in6_addr) );
+ inf6.sin6_family = AF_INET6;
+ inf6.sin6_port = 0;
+ inf6.sin6_scope_id = if_scope;
+ netif = &inf6;
+ }
+
+#if 0
+ /*
+ * Windows implementation of ICMP & RAW sockets is too unreliable for now.
+ * Therefore it's best not to try it at all and rely only on TCP
+ * We may revisit and enable this code in the future.
+ */
+
+ /*
+ * Right now, windows doesn't generate the ICMP checksum automatically
+ * so we have to compute it, but we can do it only if we know which
+ * interface will be used. Therefore, don't try to use ICMP if no
+ * interface was specified.
+ * When ICMPv6 support improves in windows, we may change this.
+ */
+ if (!(IS_NULL(ifArray))) {
+ /*
+ * If we can create a RAW socket, then when can use the ICMP ECHO_REQUEST
+ * otherwise we'll try a tcp socket to the Echo port (7).
+ * Note that this is empiric, and not connecting could mean it's blocked
+ * or the echo servioe has been disabled.
+ */
+ fd = NET_Socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
+
+ if (fd != -1) { /* Good to go, let's do a ping */
+ return ping6(env, fd, &him6, timeout, netif, ttl);
+ }
+ }
+#endif
+
+ /* No good, let's fall back on TCP */
+ fd = NET_Socket(AF_INET6, SOCK_STREAM, 0);
+ if (fd == JVM_IO_ERR) {
+ /* 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, errno, "Can't create socket");
+ return JNI_FALSE;
+ }
+
+ /**
+ * A TTL was specified, let's set the socket option.
+ */
+ if (ttl > 0) {
+ setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, (const char *)&ttl, sizeof(ttl));
+ }
+
+ /**
+ * A network interface was specified, let's bind to it.
+ */
+ if (netif != NULL) {
+ if (NET_Bind(fd, (struct sockaddr*)netif, 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.
+ */
+ hEvent = WSACreateEvent();
+ WSAEventSelect(fd, hEvent, FD_READ|FD_CONNECT|FD_CLOSE);
+
+ /* no need to use NET_Connect as non-blocking */
+ him6.sin6_port = htons((short) 7); /* Echo port */
+ connect_rv = connect(fd, (struct sockaddr *)&him6, len);
+
+ /**
+ * 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;
+ } else {
+ int optlen;
+
+ 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;
+ }
+
+ if (WSAGetLastError() != WSAEWOULDBLOCK) {
+ 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) {
+ /* has connection been established? */
+ optlen = sizeof(connect_rv);
+ if (JVM_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);
+#endif /* AF_INET6 */
+ return JNI_FALSE;
+}