1 /*
2 * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 #include <ctype.h>
26 #include <errno.h>
27 #include <sys/types.h>
28 #include <netinet/in.h>
29 #include <netinet/in_systm.h>
30 #include <netinet/ip.h>
31 #include <netinet/ip_icmp.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/time.h>
35
36 #include "net_util.h"
37
38 #include "java_net_Inet4AddressImpl.h"
39
40 #if defined(MACOSX)
41 extern jobjectArray lookupIfLocalhost(JNIEnv *env, const char *hostname, jboolean includeV6);
42 #endif
43
44 #define SET_NONBLOCKING(fd) { \
45 int flags = fcntl(fd, F_GETFL); \
46 flags |= O_NONBLOCK; \
47 fcntl(fd, F_SETFL, flags); \
48 }
49
50 /*
51 * Inet4AddressImpl
52 */
53
54 /*
55 * Class: java_net_Inet4AddressImpl
56 * Method: getLocalHostName
57 * Signature: ()Ljava/lang/String;
58 */
59 JNIEXPORT jstring JNICALL
60 Java_java_net_Inet4AddressImpl_getLocalHostName(JNIEnv *env, jobject this) {
61 char hostname[NI_MAXHOST + 1];
94 initInetAddressIDs(env);
95 JNU_CHECK_EXCEPTION_RETURN(env, NULL);
96
97 if (IS_NULL(host)) {
98 JNU_ThrowNullPointerException(env, "host argument is null");
99 return NULL;
100 }
101 hostname = JNU_GetStringPlatformChars(env, host, JNI_FALSE);
102 CHECK_NULL_RETURN(hostname, NULL);
103
104 // try once, with our static buffer
105 memset(&hints, 0, sizeof(hints));
106 hints.ai_flags = AI_CANONNAME;
107 hints.ai_family = AF_INET;
108
109 error = getaddrinfo(hostname, NULL, &hints, &res);
110
111 if (error) {
112 #if defined(MACOSX)
113 // If getaddrinfo fails try getifaddrs, see bug 8170910.
114 ret = lookupIfLocalhost(env, hostname, JNI_FALSE);
115 if (ret != NULL || (*env)->ExceptionCheck(env)) {
116 goto cleanupAndReturn;
117 }
118 #endif
119 // report error
120 NET_ThrowUnknownHostExceptionWithGaiError(env, hostname, error);
121 goto cleanupAndReturn;
122 } else {
123 int i = 0;
124 iterator = res;
125 while (iterator != NULL) {
126 // skip duplicates
127 int skip = 0;
128 struct addrinfo *iteratorNew = resNew;
129 while (iteratorNew != NULL) {
130 struct sockaddr_in *addr1, *addr2;
131 addr1 = (struct sockaddr_in *)iterator->ai_addr;
132 addr2 = (struct sockaddr_in *)iteratorNew->ai_addr;
133 if (addr1->sin_addr.s_addr == addr2->sin_addr.s_addr) {
134 skip = 1;
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1 /*
2 * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 #include <ctype.h>
26 #include <errno.h>
27 #include <sys/types.h>
28 #include <netinet/in.h>
29 #include <netinet/in_systm.h>
30 #include <netinet/ip.h>
31 #include <netinet/ip_icmp.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/time.h>
35
36 #include "net_util.h"
37
38 #include "java_net_Inet4AddressImpl.h"
39 #include "java_net_spi_InetAddressResolver_LookupPolicy.h"
40
41 #if defined(MACOSX)
42 extern jobjectArray lookupIfLocalhost(JNIEnv *env, const char *hostname, jboolean includeV6,
43 int addressesOrder);
44 #endif
45
46 #define SET_NONBLOCKING(fd) { \
47 int flags = fcntl(fd, F_GETFL); \
48 flags |= O_NONBLOCK; \
49 fcntl(fd, F_SETFL, flags); \
50 }
51
52 /*
53 * Inet4AddressImpl
54 */
55
56 /*
57 * Class: java_net_Inet4AddressImpl
58 * Method: getLocalHostName
59 * Signature: ()Ljava/lang/String;
60 */
61 JNIEXPORT jstring JNICALL
62 Java_java_net_Inet4AddressImpl_getLocalHostName(JNIEnv *env, jobject this) {
63 char hostname[NI_MAXHOST + 1];
96 initInetAddressIDs(env);
97 JNU_CHECK_EXCEPTION_RETURN(env, NULL);
98
99 if (IS_NULL(host)) {
100 JNU_ThrowNullPointerException(env, "host argument is null");
101 return NULL;
102 }
103 hostname = JNU_GetStringPlatformChars(env, host, JNI_FALSE);
104 CHECK_NULL_RETURN(hostname, NULL);
105
106 // try once, with our static buffer
107 memset(&hints, 0, sizeof(hints));
108 hints.ai_flags = AI_CANONNAME;
109 hints.ai_family = AF_INET;
110
111 error = getaddrinfo(hostname, NULL, &hints, &res);
112
113 if (error) {
114 #if defined(MACOSX)
115 // If getaddrinfo fails try getifaddrs, see bug 8170910.
116 // java_net_spi_InetAddressResolver_LookupPolicy_IPV4_FIRST and no ordering is ok
117 // here since only AF_INET addresses will be returned.
118 ret = lookupIfLocalhost(env, hostname, JNI_FALSE, java_net_spi_InetAddressResolver_LookupPolicy_IPV4);
119 if (ret != NULL || (*env)->ExceptionCheck(env)) {
120 goto cleanupAndReturn;
121 }
122 #endif
123 // report error
124 NET_ThrowUnknownHostExceptionWithGaiError(env, hostname, error);
125 goto cleanupAndReturn;
126 } else {
127 int i = 0;
128 iterator = res;
129 while (iterator != NULL) {
130 // skip duplicates
131 int skip = 0;
132 struct addrinfo *iteratorNew = resNew;
133 while (iteratorNew != NULL) {
134 struct sockaddr_in *addr1, *addr2;
135 addr1 = (struct sockaddr_in *)iterator->ai_addr;
136 addr2 = (struct sockaddr_in *)iteratorNew->ai_addr;
137 if (addr1->sin_addr.s_addr == addr2->sin_addr.s_addr) {
138 skip = 1;
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