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author | Shuyi Chen <shuyichen@google.com> | 2013-05-22 14:51:55 -0700 |
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committer | Shuyi Chen <shuyichen@google.com> | 2013-05-22 17:19:30 -0700 |
commit | d7955ce24d294fb2014c59d11fca184471056f44 (patch) | |
tree | e260500b0b7639127038495d46a0ad6dcbb6d96c /src/org/xbill/DNS/ReverseMap.java | |
parent | 8f4ce9ea0de51fee918bffe19c434612d6bbb2d7 (diff) | |
download | smack-d7955ce24d294fb2014c59d11fca184471056f44.tar.gz |
Add android smack source.HEADandroid-wear-5.0.0_r1android-sdk-4.4.2_r1.0.1android-sdk-4.4.2_r1android-l-preview_r2android-cts-5.1_r9android-cts-5.1_r8android-cts-5.1_r7android-cts-5.1_r6android-cts-5.1_r5android-cts-5.1_r4android-cts-5.1_r3android-cts-5.1_r28android-cts-5.1_r27android-cts-5.1_r26android-cts-5.1_r25android-cts-5.1_r24android-cts-5.1_r23android-cts-5.1_r22android-cts-5.1_r21android-cts-5.1_r20android-cts-5.1_r2android-cts-5.1_r19android-cts-5.1_r18android-cts-5.1_r17android-cts-5.1_r16android-cts-5.1_r15android-cts-5.1_r14android-cts-5.1_r13android-cts-5.1_r10android-cts-5.1_r1android-cts-5.0_r9android-cts-5.0_r8android-cts-5.0_r7android-cts-5.0_r6android-cts-5.0_r5android-cts-5.0_r4android-cts-5.0_r3android-cts-4.4_r4android-cts-4.4_r1android-5.1.1_r9android-5.1.1_r8android-5.1.1_r7android-5.1.1_r6android-5.1.1_r5android-5.1.1_r4android-5.1.1_r38android-5.1.1_r37android-5.1.1_r36android-5.1.1_r35android-5.1.1_r34android-5.1.1_r33android-5.1.1_r30android-5.1.1_r3android-5.1.1_r29android-5.1.1_r28android-5.1.1_r26android-5.1.1_r25android-5.1.1_r24android-5.1.1_r23android-5.1.1_r22android-5.1.1_r20android-5.1.1_r2android-5.1.1_r19android-5.1.1_r18android-5.1.1_r17android-5.1.1_r16android-5.1.1_r15android-5.1.1_r14android-5.1.1_r13android-5.1.1_r12android-5.1.1_r10android-5.1.1_r1android-5.1.0_r5android-5.1.0_r4android-5.1.0_r3android-5.1.0_r1android-5.0.2_r3android-5.0.2_r1android-5.0.1_r1android-5.0.0_r7android-5.0.0_r6android-5.0.0_r5.1android-5.0.0_r5android-5.0.0_r4android-5.0.0_r3android-5.0.0_r2android-5.0.0_r1android-4.4w_r1android-4.4_r1.2.0.1android-4.4_r1.2android-4.4_r1.1.0.1android-4.4_r1.1android-4.4_r1.0.1android-4.4_r1android-4.4_r0.9android-4.4_r0.8android-4.4_r0.7android-4.4.4_r2.0.1android-4.4.4_r2android-4.4.4_r1.0.1android-4.4.4_r1android-4.4.3_r1.1.0.1android-4.4.3_r1.1android-4.4.3_r1.0.1android-4.4.3_r1android-4.4.2_r2.0.1android-4.4.2_r2android-4.4.2_r1.0.1android-4.4.2_r1android-4.4.1_r1.0.1android-4.4.1_r1android-4.3_r3.1android-4.3_r3android-4.3_r2.3android-4.3_r2.2android-4.3_r2.1android-4.3_r2android-4.3_r1.1android-4.3_r1android-4.3_r0.9.1android-4.3_r0.9android-4.3.1_r1tools_r22.2mastermainlollipop-wear-releaselollipop-releaselollipop-mr1-wfc-releaselollipop-mr1-releaselollipop-mr1-fi-releaselollipop-mr1-devlollipop-mr1-cts-releaselollipop-devlollipop-cts-releasel-previewkitkat-wearkitkat-releasekitkat-mr2.2-releasekitkat-mr2.1-releasekitkat-mr2-releasekitkat-mr1.1-releasekitkat-mr1-releasekitkat-devkitkat-cts-releasekitkat-cts-devjb-mr2.0.0-releasejb-mr2.0-releasejb-mr2-releasejb-mr2-devidea133-weekly-releaseidea133
Change-Id: I49ce97136c17173c4ae3965c694af6e7bc49897d
Diffstat (limited to 'src/org/xbill/DNS/ReverseMap.java')
-rw-r--r-- | src/org/xbill/DNS/ReverseMap.java | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/org/xbill/DNS/ReverseMap.java b/src/org/xbill/DNS/ReverseMap.java new file mode 100644 index 0000000..f4293de --- /dev/null +++ b/src/org/xbill/DNS/ReverseMap.java @@ -0,0 +1,130 @@ +// Copyright (c) 2003-2004 Brian Wellington (bwelling@xbill.org) + +package org.xbill.DNS; + +import java.net.*; + +/** + * A set functions designed to deal with DNS names used in reverse mappings. + * For the IPv4 address a.b.c.d, the reverse map name is d.c.b.a.in-addr.arpa. + * For an IPv6 address, the reverse map name is ...ip6.arpa. + * + * @author Brian Wellington + */ + +public final class ReverseMap { + +private static Name inaddr4 = Name.fromConstantString("in-addr.arpa."); +private static Name inaddr6 = Name.fromConstantString("ip6.arpa."); + +/* Otherwise the class could be instantiated */ +private +ReverseMap() {} + +/** + * Creates a reverse map name corresponding to an address contained in + * an array of 4 bytes (for an IPv4 address) or 16 bytes (for an IPv6 address). + * @param addr The address from which to build a name. + * @return The name corresponding to the address in the reverse map. + */ +public static Name +fromAddress(byte [] addr) { + if (addr.length != 4 && addr.length != 16) + throw new IllegalArgumentException("array must contain " + + "4 or 16 elements"); + + StringBuffer sb = new StringBuffer(); + if (addr.length == 4) { + for (int i = addr.length - 1; i >= 0; i--) { + sb.append(addr[i] & 0xFF); + if (i > 0) + sb.append("."); + } + } else { + int [] nibbles = new int[2]; + for (int i = addr.length - 1; i >= 0; i--) { + nibbles[0] = (addr[i] & 0xFF) >> 4; + nibbles[1] = (addr[i] & 0xFF) & 0xF; + for (int j = nibbles.length - 1; j >= 0; j--) { + sb.append(Integer.toHexString(nibbles[j])); + if (i > 0 || j > 0) + sb.append("."); + } + } + } + + try { + if (addr.length == 4) + return Name.fromString(sb.toString(), inaddr4); + else + return Name.fromString(sb.toString(), inaddr6); + } + catch (TextParseException e) { + throw new IllegalStateException("name cannot be invalid"); + } +} + +/** + * Creates a reverse map name corresponding to an address contained in + * an array of 4 integers between 0 and 255 (for an IPv4 address) or 16 + * integers between 0 and 255 (for an IPv6 address). + * @param addr The address from which to build a name. + * @return The name corresponding to the address in the reverse map. + */ +public static Name +fromAddress(int [] addr) { + byte [] bytes = new byte[addr.length]; + for (int i = 0; i < addr.length; i++) { + if (addr[i] < 0 || addr[i] > 0xFF) + throw new IllegalArgumentException("array must " + + "contain values " + + "between 0 and 255"); + bytes[i] = (byte) addr[i]; + } + return fromAddress(bytes); +} + +/** + * Creates a reverse map name corresponding to an address contained in + * an InetAddress. + * @param addr The address from which to build a name. + * @return The name corresponding to the address in the reverse map. + */ +public static Name +fromAddress(InetAddress addr) { + return fromAddress(addr.getAddress()); +} + +/** + * Creates a reverse map name corresponding to an address contained in + * a String. + * @param addr The address from which to build a name. + * @return The name corresponding to the address in the reverse map. + * @throws UnknownHostException The string does not contain a valid address. + */ +public static Name +fromAddress(String addr, int family) throws UnknownHostException { + byte [] array = Address.toByteArray(addr, family); + if (array == null) + throw new UnknownHostException("Invalid IP address"); + return fromAddress(array); +} + +/** + * Creates a reverse map name corresponding to an address contained in + * a String. + * @param addr The address from which to build a name. + * @return The name corresponding to the address in the reverse map. + * @throws UnknownHostException The string does not contain a valid address. + */ +public static Name +fromAddress(String addr) throws UnknownHostException { + byte [] array = Address.toByteArray(addr, Address.IPv4); + if (array == null) + array = Address.toByteArray(addr, Address.IPv6); + if (array == null) + throw new UnknownHostException("Invalid IP address"); + return fromAddress(array); +} + +} |