[3699] Added more traces to the CfgHosts class.

src/lib/dhcpsrv/cfg_hosts.cc

@@ -81,7 +81,34 @@ void
 CfgHosts::getAllInternal(const std::vector<uint8_t>& identifier,
                          const Host::IdentifierType& identifier_type,
                          Storage& storage) const {
-    // HOST_RESRV_GET_ALL_IDENTIFIER
+    // We will need to transform the identifier into the textual format.
+    // Until we do it, we mark it as invalid.
+    std::string identifier_text = "(invalid)";
+    if (!identifier.empty()) {
+        try {
+            // Use Host object to find the textual form of the identifier.
+            // This may throw exception if the identifier is invalid.
+            Host host(&identifier[0], identifier.size(), identifier_type,
+                      SubnetID(0), SubnetID(0), IOAddress::IPV4_ZERO_ADDRESS());
+            identifier_text = host.getIdentifierAsText();
+
+        } catch (...) {
+            // Suppress exception and keep using (invalid) as an
+            // identifier. We will log that the identifier is
+            // invalid and return.
+        }
+
+    }
+    // This will log that we're invoking this function with the specified
+    // identifier. The identifier may also be marked as (invalid) if it
+    // had 0 length or its type is unsupported.
+    LOG_DEBUG(hosts_logger, HOSTS_DBG_TRACE, HOSTS_CFG_GET_ALL_IDENTIFIER)
+        .arg(identifier_text);
+
+    // Do nothing if the identifier specified is invalid.
+    if (identifier_text == "(invalid)") {
+        return;
+    }
 
     // Use the identifier and identifier type as a composite key.
     const HostContainerIndex0& idx = hosts_.get<0>();

src/lib/dhcpsrv/host.cc

@@ -138,6 +138,24 @@ Host::getIdentifierType() const {
     return (IDENT_DUID);
 }
 
+std::string
+Host::getIdentifierAsText() const {
+    std::string txt;
+    if (hw_address_) {
+        txt = "hwaddr=" + hw_address_->toText(false);
+    } else {
+        txt = "duid=";
+        if (duid_) {
+            txt += duid_->toText();
+        } else {
+            txt += "(none)";
+        }
+    }
+
+    return (txt);
+
+}
+
 void
 Host::setIdentifier(const uint8_t* identifier, const size_t len,
                     const IdentifierType& type) {
@@ -252,23 +270,6 @@ Host::addClientClassInternal(ClientClasses& classes,
 }
 
 std::string
-Host::getIdentifierAsText() const {
-    std::string txt;
-    if (hw_address_) {
-        txt = "hwaddr=" + hw_address_->toText(false);
-    } else {
-        txt = "duid=";
-        if (duid_) {
-            txt += duid_->toText();
-        } else {
-            txt += "(none)";
-        }
-    }
-
-    return (txt);
-}
-
-std::string
 Host::toText() const {
     std::ostringstream s;
 

src/lib/dhcpsrv/hosts_messages.mes

@@ -34,6 +34,11 @@ This debug message is issued when retrieving reservations for all hosts
 using specific HW address or DUID. The arguments specify the HW address and
 DUID respectively. The argument specify the HW address and DUID respectively.
 
+% HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using identifier: %1
+This debug message is issued when retrieving reservations for all hosts
+identified by HW address or DUID. The argument holds both the identifier
+type and the value.
+
 % HOSTS_CFG_GET_ALL_SUBNET_ID_ADDRESS6 get all hosts with reservations for subnet id %1 and IPv6 address %2
 This debug message is issued when retrieving all hosts connected to
 the specific subnet and having the specific IPv6 address reserved.