private Target createTarget(OctetString userInfo) {
if ((userInfo == null) || (userInfo.length() == 0)) {
return defaultTarget;
}
if (version == SnmpConstants.version3) {
if ((securityModel == SecurityModel.SECURITY_MODEL_USM) && (usm != null)) {
UsmUserEntry user = usm.getUser(null, userInfo);
UserTarget target = new UserTarget();
if (user != null) {
if (user.getAuthenticationKey() != null) {
if (user.getPrivacyKey() != null) {
target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
} else {
target.setSecurityLevel(SecurityLevel.AUTH_NOPRIV);
}
} else {
target.setSecurityLevel(SecurityLevel.NOAUTH_NOPRIV);
}
}
target.setVersion(version);
target.setSecurityName(userInfo);
target.setSecurityModel(securityModel);
target.setTimeout(timeout);
target.setRetries(retries);
return target;
} else if (securityModel == SecurityModel.SECURITY_MODEL_TSM) {
CertifiedTarget target = new CertifiedTarget(userInfo);
target.setVersion(version);
target.setSecurityModel(securityModel);
target.setTimeout(timeout);
target.setRetries(retries);
return target;
}
} else {
CommunityTarget target = new CommunityTarget();
target.setCommunity(userInfo);
target.setVersion(version);
target.setSecurityModel(securityModel);
target.setTimeout(timeout);
target.setRetries(retries);
return target;
}
return null;
}
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);
}