| // Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org) |
| |
| package org.xbill.DNS; |
| |
| import java.io.*; |
| import java.text.*; |
| |
| /** |
| * Location - describes the physical location of hosts, networks, subnets. |
| * |
| * @author Brian Wellington |
| */ |
| |
| public class LOCRecord extends Record { |
| |
| private static final long serialVersionUID = 9058224788126750409L; |
| |
| private static NumberFormat w2, w3; |
| |
| private long size, hPrecision, vPrecision; |
| private long latitude, longitude, altitude; |
| |
| static { |
| w2 = new DecimalFormat(); |
| w2.setMinimumIntegerDigits(2); |
| |
| w3 = new DecimalFormat(); |
| w3.setMinimumIntegerDigits(3); |
| } |
| |
| LOCRecord() {} |
| |
| Record |
| getObject() { |
| return new LOCRecord(); |
| } |
| |
| /** |
| * Creates an LOC Record from the given data |
| * @param latitude The latitude of the center of the sphere |
| * @param longitude The longitude of the center of the sphere |
| * @param altitude The altitude of the center of the sphere, in m |
| * @param size The diameter of a sphere enclosing the described entity, in m. |
| * @param hPrecision The horizontal precision of the data, in m. |
| * @param vPrecision The vertical precision of the data, in m. |
| */ |
| public |
| LOCRecord(Name name, int dclass, long ttl, double latitude, double longitude, |
| double altitude, double size, double hPrecision, double vPrecision) |
| { |
| super(name, Type.LOC, dclass, ttl); |
| this.latitude = (long)(latitude * 3600 * 1000 + (1L << 31)); |
| this.longitude = (long)(longitude * 3600 * 1000 + (1L << 31)); |
| this.altitude = (long)((altitude + 100000) * 100); |
| this.size = (long)(size * 100); |
| this.hPrecision = (long)(hPrecision * 100); |
| this.vPrecision = (long)(vPrecision * 100); |
| } |
| |
| void |
| rrFromWire(DNSInput in) throws IOException { |
| int version; |
| |
| version = in.readU8(); |
| if (version != 0) |
| throw new WireParseException("Invalid LOC version"); |
| |
| size = parseLOCformat(in.readU8()); |
| hPrecision = parseLOCformat(in.readU8()); |
| vPrecision = parseLOCformat(in.readU8()); |
| latitude = in.readU32(); |
| longitude = in.readU32(); |
| altitude = in.readU32(); |
| } |
| |
| private double |
| parseFixedPoint(String s) |
| { |
| if (s.matches("^-?\\d+$")) |
| return Integer.parseInt(s); |
| else if (s.matches("^-?\\d+\\.\\d*$")) { |
| String [] parts = s.split("\\."); |
| double value = Integer.parseInt(parts[0]); |
| double fraction = Integer.parseInt(parts[1]); |
| if (value < 0) |
| fraction *= -1; |
| int digits = parts[1].length(); |
| return value + (fraction / Math.pow(10, digits)); |
| } else |
| throw new NumberFormatException(); |
| } |
| |
| private long |
| parsePosition(Tokenizer st, String type) throws IOException { |
| boolean isLatitude = type.equals("latitude"); |
| int deg = 0, min = 0; |
| double sec = 0; |
| long value; |
| String s; |
| |
| deg = st.getUInt16(); |
| if (deg > 180 || (deg > 90 && isLatitude)) |
| throw st.exception("Invalid LOC " + type + " degrees"); |
| |
| s = st.getString(); |
| try { |
| min = Integer.parseInt(s); |
| if (min < 0 || min > 59) |
| throw st.exception("Invalid LOC " + type + " minutes"); |
| s = st.getString(); |
| sec = parseFixedPoint(s); |
| if (sec < 0 || sec >= 60) |
| throw st.exception("Invalid LOC " + type + " seconds"); |
| s = st.getString(); |
| } catch (NumberFormatException e) { |
| } |
| |
| if (s.length() != 1) |
| throw st.exception("Invalid LOC " + type); |
| |
| value = (long) (1000 * (sec + 60L * (min + 60L * deg))); |
| |
| char c = Character.toUpperCase(s.charAt(0)); |
| if ((isLatitude && c == 'S') || (!isLatitude && c == 'W')) |
| value = -value; |
| else if ((isLatitude && c != 'N') || (!isLatitude && c != 'E')) |
| throw st.exception("Invalid LOC " + type); |
| |
| value += (1L << 31); |
| |
| return value; |
| } |
| |
| private long |
| parseDouble(Tokenizer st, String type, boolean required, long min, long max, |
| long defaultValue) |
| throws IOException |
| { |
| Tokenizer.Token token = st.get(); |
| if (token.isEOL()) { |
| if (required) |
| throw st.exception("Invalid LOC " + type); |
| st.unget(); |
| return defaultValue; |
| } |
| String s = token.value; |
| if (s.length() > 1 && s.charAt(s.length() - 1) == 'm') |
| s = s.substring(0, s.length() - 1); |
| try { |
| long value = (long)(100 * parseFixedPoint(s)); |
| if (value < min || value > max) |
| throw st.exception("Invalid LOC " + type); |
| return value; |
| } |
| catch (NumberFormatException e) { |
| throw st.exception("Invalid LOC " + type); |
| } |
| } |
| |
| void |
| rdataFromString(Tokenizer st, Name origin) throws IOException { |
| latitude = parsePosition(st, "latitude"); |
| longitude = parsePosition(st, "longitude"); |
| altitude = parseDouble(st, "altitude", true, |
| -10000000, 4284967295L, 0) + 10000000; |
| size = parseDouble(st, "size", false, 0, 9000000000L, 100); |
| hPrecision = parseDouble(st, "horizontal precision", false, |
| 0, 9000000000L, 1000000); |
| vPrecision = parseDouble(st, "vertical precision", false, |
| 0, 9000000000L, 1000); |
| } |
| |
| private void |
| renderFixedPoint(StringBuffer sb, NumberFormat formatter, long value, |
| long divisor) |
| { |
| sb.append(value / divisor); |
| value %= divisor; |
| if (value != 0) { |
| sb.append("."); |
| sb.append(formatter.format(value)); |
| } |
| } |
| |
| private String |
| positionToString(long value, char pos, char neg) { |
| StringBuffer sb = new StringBuffer(); |
| char direction; |
| |
| long temp = value - (1L << 31); |
| if (temp < 0) { |
| temp = -temp; |
| direction = neg; |
| } else |
| direction = pos; |
| |
| sb.append(temp / (3600 * 1000)); /* degrees */ |
| temp = temp % (3600 * 1000); |
| sb.append(" "); |
| |
| sb.append(temp / (60 * 1000)); /* minutes */ |
| temp = temp % (60 * 1000); |
| sb.append(" "); |
| |
| renderFixedPoint(sb, w3, temp, 1000); /* seconds */ |
| sb.append(" "); |
| |
| sb.append(direction); |
| |
| return sb.toString(); |
| } |
| |
| |
| /** Convert to a String */ |
| String |
| rrToString() { |
| StringBuffer sb = new StringBuffer(); |
| |
| /* Latitude */ |
| sb.append(positionToString(latitude, 'N', 'S')); |
| sb.append(" "); |
| |
| /* Latitude */ |
| sb.append(positionToString(longitude, 'E', 'W')); |
| sb.append(" "); |
| |
| /* Altitude */ |
| renderFixedPoint(sb, w2, altitude - 10000000, 100); |
| sb.append("m "); |
| |
| /* Size */ |
| renderFixedPoint(sb, w2, size, 100); |
| sb.append("m "); |
| |
| /* Horizontal precision */ |
| renderFixedPoint(sb, w2, hPrecision, 100); |
| sb.append("m "); |
| |
| /* Vertical precision */ |
| renderFixedPoint(sb, w2, vPrecision, 100); |
| sb.append("m"); |
| |
| return sb.toString(); |
| } |
| |
| /** Returns the latitude */ |
| public double |
| getLatitude() { |
| return ((double)(latitude - (1L << 31))) / (3600 * 1000); |
| } |
| |
| /** Returns the longitude */ |
| public double |
| getLongitude() { |
| return ((double)(longitude - (1L << 31))) / (3600 * 1000); |
| } |
| |
| /** Returns the altitude */ |
| public double |
| getAltitude() { |
| return ((double)(altitude - 10000000)) / 100; |
| } |
| |
| /** Returns the diameter of the enclosing sphere */ |
| public double |
| getSize() { |
| return ((double)size) / 100; |
| } |
| |
| /** Returns the horizontal precision */ |
| public double |
| getHPrecision() { |
| return ((double)hPrecision) / 100; |
| } |
| |
| /** Returns the horizontal precision */ |
| public double |
| getVPrecision() { |
| return ((double)vPrecision) / 100; |
| } |
| |
| void |
| rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| out.writeU8(0); /* version */ |
| out.writeU8(toLOCformat(size)); |
| out.writeU8(toLOCformat(hPrecision)); |
| out.writeU8(toLOCformat(vPrecision)); |
| out.writeU32(latitude); |
| out.writeU32(longitude); |
| out.writeU32(altitude); |
| } |
| |
| private static long |
| parseLOCformat(int b) throws WireParseException { |
| long out = b >> 4; |
| int exp = b & 0xF; |
| if (out > 9 || exp > 9) |
| throw new WireParseException("Invalid LOC Encoding"); |
| while (exp-- > 0) |
| out *= 10; |
| return (out); |
| } |
| |
| private int |
| toLOCformat(long l) { |
| byte exp = 0; |
| while (l > 9) { |
| exp++; |
| l /= 10; |
| } |
| return (int)((l << 4) + exp); |
| } |
| |
| } |