public boolean isConfigured() {
if (m_dnsServerConfigIP4 != null
&& m_dnsServerConfigIP4.getForwarders() != null
&& m_dnsServerConfigIP4.getForwarders().size() > 0
&& m_dnsServerConfigIP4.getAllowedNetworks() != null
&& m_dnsServerConfigIP4.getAllowedNetworks().size() > 0) {
return true;
} else {
return false;
}
}
private String getForwardingNamedFile() {
StringBuilder sb =
new StringBuilder()
.append("// Forwarding and Caching Name Server Configuration\n")
.append("options {\n")
.append("\tdirectory \"/var/named\";\n")
.append("\tversion \"not currently available\";\n")
.append("\tforwarders {");
Set<IP4Address> forwarders = m_dnsServerConfigIP4.getForwarders();
for (IP4Address forwarder : forwarders) {
sb.append(forwarder.getHostAddress()).append(";");
}
sb.append("};\n");
sb.append("\tforward only;\n")
.append("\tallow-transfer{\"none\";};\n")
.append("\tallow-query {");
Set<NetworkPair<IP4Address>> allowedNetworks = m_dnsServerConfigIP4.getAllowedNetworks();
for (NetworkPair<IP4Address> pair : allowedNetworks) {
sb.append(pair.getIpAddress().getHostAddress())
.append("/")
.append(pair.getPrefix())
.append(";");
}
sb.append("};\n");
sb.append("\tmax-cache-ttl 30;\n");
sb.append("\tmax-ncache-ttl 30;\n");
sb.append("};\n")
.append("logging{\n")
.append("\tchannel named_log {\n")
.append("\t\tfile \"")
.append(s_logFileName)
.append("\" versions 3;\n")
.append("\t\tseverity info;\n")
.append("\t\tprint-severity yes;\n")
.append("\t\tprint-time yes;\n")
.append("\t\tprint-category yes;\n")
.append("\t};\n")
.append("\tcategory default{\n")
.append("\t\tnamed_log;\n")
.append("\t};\n")
.append("};\n")
.append("zone \".\" IN {\n")
.append("\ttype hint;\n")
.append("\tfile \"named.ca\";\n")
.append("};\n")
.append("include \"")
.append(s_rfc1912ZonesFilename)
.append("\";\n");
return sb.toString();
}
public boolean enable() throws KuraException {
// write config happened during 'set config' step
try {
// Check if named is running
int pid = LinuxProcessUtil.getPid(s_procString);
if (pid > -1) {
// If so, disable it
s_logger.error("DNS server is already running, bringing it down...");
disable();
}
// Start named
int result = -1;
if (OS_VERSION.equals(
KuraConstants.Mini_Gateway.getImageName()
+ "_"
+ KuraConstants.Mini_Gateway.getImageVersion())) {
result = LinuxProcessUtil.start("/etc/init.d/bind start");
} else if (OS_VERSION.equals(
KuraConstants.ReliaGATE_10_05.getImageName()
+ "_"
+ KuraConstants.ReliaGATE_10_05.getImageVersion())) {
result = LinuxProcessUtil.start("/etc/init.d/bind start");
} else if (OS_VERSION.equals(KuraConstants.Raspberry_Pi.getImageName())
|| OS_VERSION.equals(KuraConstants.BeagleBone.getImageName())) {
result = LinuxProcessUtil.start("/etc/init.d/bind9 start");
} else if (OS_VERSION.equals(
KuraConstants.Intel_Edison.getImageName()
+ "_"
+ KuraConstants.Intel_Edison.getImageVersion()
+ "_"
+ KuraConstants.Intel_Edison.getTargetName())) {
result = LinuxProcessUtil.start("/etc/init.d/bind start");
} else if (OS_VERSION.equals(
KuraConstants.ReliaGATE_50_21_Ubuntu.getImageName()
+ "_"
+ KuraConstants.ReliaGATE_50_21_Ubuntu.getImageVersion())) {
result = LinuxProcessUtil.start("/etc/init.d/bind9 start");
} else {
s_logger.info("Linux named enable fallback");
result = LinuxProcessUtil.start("/etc/init.d/named start");
}
if (result == 0) {
s_logger.debug("DNS server started.");
s_logger.trace(m_dnsServerConfigIP4.toString());
return true;
}
} catch (Exception e) {
throw new KuraException(KuraErrorCode.INTERNAL_ERROR, e);
}
return false;
}
public boolean disable() throws KuraException {
try {
int result = -1;
// If so, stop it.
if (OS_VERSION.equals(
KuraConstants.Mini_Gateway.getImageName()
+ "_"
+ KuraConstants.Mini_Gateway.getImageVersion())) {
result = LinuxProcessUtil.start("/etc/init.d/bind stop");
} else if (OS_VERSION.equals(KuraConstants.Raspberry_Pi.getImageName())
|| OS_VERSION.equals(KuraConstants.BeagleBone.getImageName())) {
result = LinuxProcessUtil.start("/etc/init.d/bind9 stop");
} else if (OS_VERSION.equals(
KuraConstants.Intel_Edison.getImageName()
+ "_"
+ KuraConstants.Intel_Edison.getImageVersion()
+ "_"
+ KuraConstants.Intel_Edison.getTargetName())) {
result = LinuxProcessUtil.start("/etc/init.d/bind stop");
} else if (OS_VERSION.equals(
KuraConstants.ReliaGATE_50_21_Ubuntu.getImageName()
+ "_"
+ KuraConstants.ReliaGATE_50_21_Ubuntu.getImageVersion())) {
result = LinuxProcessUtil.start("/etc/init.d/bind9 stop");
} else {
result = LinuxProcessUtil.start("/etc/init.d/named stop");
}
if (result == 0) {
s_logger.debug("DNS server stopped.");
s_logger.trace(m_dnsServerConfigIP4.toString());
return true;
} else {
s_logger.debug("tried to kill DNS server for interface but it is not running");
}
} catch (Exception e) {
throw new KuraException(KuraErrorCode.INTERNAL_ERROR, e);
}
return true;
}
private void writeConfig() throws KuraException {
try {
FileOutputStream fos = new FileOutputStream(s_persistentConfigFileName);
PrintWriter pw = new PrintWriter(fos);
// build up the file
if (m_dnsServerConfigIP4 == null
|| m_dnsServerConfigIP4.getForwarders() == null
|| m_dnsServerConfigIP4.getAllowedNetworks() == null
|| m_dnsServerConfigIP4.getForwarders().size() == 0
|| m_dnsServerConfigIP4.getAllowedNetworks().size() == 0) {
s_logger.debug(
"writing default named.conf to "
+ s_persistentConfigFileName
+ " with: "
+ m_dnsServerConfigIP4.toString());
pw.print(getDefaultNamedFile());
} else {
s_logger.debug(
"writing custom named.conf to "
+ s_persistentConfigFileName
+ " with: "
+ m_dnsServerConfigIP4.toString());
pw.print(getForwardingNamedFile());
}
pw.flush();
fos.getFD().sync();
pw.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
throw new KuraException(
KuraErrorCode.CONFIGURATION_ERROR,
"error while building up new configuration files for dns servers: " + e.getMessage());
}
}