add getServiceName method

This commit is contained in:
Doug MacEachern 2005-03-11 02:37:38 +00:00
parent 3d0dc203d8
commit 29087cf649
1 changed files with 81 additions and 1 deletions

View File

@ -1,13 +1,93 @@
package net.hyperic.sigar; package net.hyperic.sigar;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList; import java.util.ArrayList;
import java.util.List; import java.util.List;
import java.util.HashMap; import java.util.HashMap;
import java.util.Iterator; import java.util.Iterator;
import java.util.Map; import java.util.Map;
import java.util.StringTokenizer;
public class NetPortMap { public class NetPortMap {
private static Map udpServices = null;
private static Map tcpServices = null;
private static void parseServices(String type, Map services) {
File file = new File("/etc/services");
if (!file.exists()) {
return;
}
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(file));
String line;
while ((line = reader.readLine()) != null) {
String name, protocol;
Long port;
line = line.trim();
if ((line.length() == 0) || (line.charAt(0) == '#')) {
continue;
}
StringTokenizer st = new StringTokenizer(line, " \t/#");
if (st.countTokens() < 3) {
continue;
}
name = st.nextToken().trim();
String pnum = st.nextToken().trim();
protocol = st.nextToken().trim();
if (!type.equals(protocol)) {
continue;
}
services.put(Long.valueOf(pnum), name);
}
} catch (IOException e) {
return;
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) { }
}
}
}
public static String getServiceName(String protocol, long port) {
if (protocol.equals("tcp")) {
return getTcpServiceName(port);
}
else if (protocol.equals("udp")) {
return getUdpServiceName(port);
}
else {
return String.valueOf(port);
}
}
public static String getTcpServiceName(long port) {
if (tcpServices == null) {
tcpServices = new HashMap();
parseServices("tcp", tcpServices);
}
return (String)tcpServices.get(new Long(port));
}
public static String getUdpServiceName(long port) {
if (udpServices == null) {
udpServices = new HashMap();
parseServices("udp", udpServices);
}
return (String)udpServices.get(new Long(port));
}
/** /**
* Map listening tcp ports to connected remote addresses. * Map listening tcp ports to connected remote addresses.
* key == Listening tcp port on the local machine. * key == Listening tcp port on the local machine.