public void onResponse(ResponseEvent re) {
// Always cancel async request when response has been received
// otherwise a memory leak is created! Not canceling a request
// immediately can be useful when sending a request to a broadcast
// address.
try {
Object source = re.getSource();
// test to ignore REPORTS from DISCOVERY messages in SNMPv3
if (!(source instanceof Snmp)) return;
((Snmp) source).cancel(re.getRequest(), this);
// create the SnmpMsg received
MsgSnmp msg = new MsgSnmp();
msg.setPdu(re.getResponse());
// TODO: how to know the version here to set communityTarget or UserTarget
Target target = new CommunityTarget();
// ((CommunityTarget)target).setCommunity(new
// OctetString(re.getStateReference().getSecurityName()));
target.setAddress(re.getPeerAddress());
msg.setTarget((AbstractTarget) target);
UdpAddress add = (UdpAddress) re.getPeerAddress();
msg.setRemotePort(add.getPort());
msg.setRemoteHost(add.getInetAddress().getHostAddress());
msg.setListenpoint(listenpoint);
StackFactory.getStack(StackFactory.PROTOCOL_SNMP).receiveMessage(msg);
} catch (Exception ex) {
}
}
public Target getTarget(String host, int port, int retries, int timeout)
throws UnknownHostException {
Target target = getTarget();
Address address = new UdpAddress(InetAddress.getByName(host), port);
target.setAddress(address);
target.setRetries(retries);
target.setTimeout(timeout);
return target;
}
private Target makeSnmpTarget(HttpServletRequest request) throws UnknownHostException {
String hostname = request.getParameter("host");
String community = request.getParameter("discoverSnmpCommunity");
if (community == null) {
community = "public";
}
int port = jrds.Util.parseStringNumber(request.getParameter("discoverSnmpPort"), 161);
IpAddress addr = new UdpAddress(InetAddress.getByName(hostname), port);
Target hosttarget = new CommunityTarget(addr, new OctetString(community));
hosttarget.setVersion(SnmpConstants.version2c);
return hosttarget;
}
@Override
public void addConnection(JrdsElement hostElement, HttpServletRequest request) {
JrdsElement snmpElem = hostElement.addElement("connection", "type=jrds.snmp.SnmpConnection");
if (hosttarget instanceof CommunityTarget) {
CommunityTarget ct = (CommunityTarget) hosttarget;
snmpElem.addElement("attr", "name=community").setTextContent(ct.getCommunity().toString());
}
snmpElem
.addElement("attr", "name=version")
.setTextContent(Integer.toString(1 + hosttarget.getVersion()));
}
private Request createSnmpRequest(URI url) throws UnknownHostException {
String host = url.getHost();
int port = url.getPort();
if (port == -1) {
port = SnmpConstants.DEFAULT_COMMAND_RESPONDER_PORT;
}
String userInfo = url.getUserInfo();
if (userInfo == null) {
userInfo = defaultUserInfo;
}
String path = url.getPath();
String[] segments = path.split("/");
String contextInfo;
String contextName = "";
OctetString contextEngineID = null;
String oidPart = null;
if (segments.length > 1) {
contextInfo = segments[0];
oidPart = segments[1];
String[] contextInfos = contextInfo.split(";");
if (contextInfos.length > 1) {
contextEngineID = OctetString.fromHexStringPairs(contextInfos[1]);
}
contextName = contextInfos[0];
} else if (segments.length == 1) {
oidPart = segments[0];
}
Target t = createTarget(new OctetString(userInfo));
if (host != null) {
if (t instanceof CertifiedTarget) {
t.setAddress(new TlsAddress(InetAddress.getByName(host), port));
} else {
t.setAddress(new UdpAddress(InetAddress.getByName(host), port));
}
} else {
t = defaultTarget;
}
PDU pdu = pduFactory.createPDU(t);
if (pdu instanceof ScopedPDU) {
if (contextEngineID != null) {
((ScopedPDU) pdu).setContextEngineID(contextEngineID);
}
if (contextName != null) {
((ScopedPDU) pdu).setContextName(new OctetString(contextName));
}
}
SnmpUriType type = SnmpUriType.GET;
if (oidPart != null && oidPart.endsWith(".*")) {
type = SnmpUriType.SUBTREE;
oidPart = oidPart.substring(0, oidPart.length() - 2);
} else if (oidPart != null && oidPart.endsWith("+")) {
type = SnmpUriType.NEXT;
oidPart = oidPart.substring(0, oidPart.length() - 1);
}
List<OID> oids;
if (oidPart != null && oidPart.contains("(")) {
String[] oidStrings = oidPart.split("[\\(,\\),\\,]");
oids = new ArrayList<>(oidStrings.length);
for (String oidString : oidStrings) {
if (!oidString.isEmpty()) {
OID o = new OID(oidString);
if (o.isValid()) {
oids.add(o);
}
}
}
} else if (oidPart != null) {
oids = Collections.singletonList(new OID(oidPart));
} else {
oids = Collections.emptyList();
}
return new Request(t, pdu, oids.toArray(new OID[oids.size()]), type);
}