CMakeLists.txt

@@ -53,7 +53,7 @@ if(UNIX)
   #
   # use rpath for locating installed libraries
   #
-  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
   set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
   include(CheckIncludeFile)

src/Cedar/Virtual.c

@@ -9340,75 +9340,20 @@ UINT ServeDhcpDiscoverEx(VH *v, UCHAR *mac, UINT request_ip, bool is_static_ip)
 		return 0;
 	}
 
-	UINT ret = 0;
 	DHCP_LEASE *d = SearchDhcpLeaseByIp(v, request_ip);
-
 	if (d != NULL)
 	{
-		// If an entry for the same IP address already exists,
+		// The requested IP address is used already
-		// check whether it is a request from the same MAC address
+		return 0;
-		if (Cmp(mac, d->MacAddress, 6) == 0)
-		{
-			// Examine whether the specified IP address is within the range of assignment
-			if (Endian32(v->DhcpIpStart) > Endian32(request_ip) ||
-				Endian32(request_ip) > Endian32(v->DhcpIpEnd))
-			{
-				// Accept if within the range
-				ret = request_ip;
-			}
-		}
-		else {
-			// Duplicated IPV4 address found. The DHCP server replies to DHCPREQUEST with DHCP NAK.
-			char ipstr[MAX_HOST_NAME_LEN + 1] = { 0 };
-			char macstr[128] = { 0 };
-			IPToStr32(ipstr, sizeof(ipstr), request_ip);
-			BinToStr(macstr, sizeof(macstr), d->MacAddress, 6);
-			Debug("Virtual DHC Server: Duplicated IP address detected. Static IP: %s, Used by MAC:%s\n", ipstr, macstr);
-			return ret;
-		}
-	}
-	else
-	{
-		// Examine whether the specified IP address is within the range of assignment
-		if (Endian32(v->DhcpIpStart) > Endian32(request_ip) ||
-			Endian32(request_ip) > Endian32(v->DhcpIpEnd))
-		{
-			// Accept if within the range
-			ret = request_ip;
-		}
-		else
-		{
-			// Propose an IP in the range since it's a Discover although It is out of range
-		}
-	}
-	if (ret == 0)
-	{
-		// If there is any entry with the same MAC address
-		// that are already registered, use it with priority
-		DHCP_LEASE *d = SearchDhcpLeaseByMac(v, mac);
-
-		if (d != NULL)
-		{
-			// Examine whether the found IP address is in the allocation region
-			if (Endian32(v->DhcpIpStart) > Endian32(d->IpAddress) ||
-				Endian32(d->IpAddress) > Endian32(v->DhcpIpEnd))
-			{
-				// Use the IP address if it's found within the range
-				ret = d->IpAddress;
-			}
-		}
-	}
-	if (ret == 0)
-	{
-		// For static IP, the requested IP address must NOT be within the range of the DHCP pool
-		if (Endian32(v->DhcpIpStart) > Endian32(request_ip) ||
-			Endian32(request_ip) > Endian32(v->DhcpIpEnd))
-		{
-			ret = request_ip;
-		}
 	}
 
-	return ret;
+	// For static IP, the requested IP address must NOT be within the range of the DHCP pool
+	if (Endian32(request_ip) < Endian32(v->DhcpIpStart) || Endian32(request_ip) > Endian32(v->DhcpIpEnd))
+	{
+		return request_ip;
+	}
+
+	return 0;
 }
 
 // Take an appropriate IP addresses that can be assigned newly
@@ -9765,40 +9710,36 @@ void VirtualDhcpServer(VH *v, PKT *p)
 		}
 		else
 		{
-			// Reply of DHCP_REQUEST must be either DHCP_ACK or DHCP_NAK.
+			// There is no IP address that can be provided
-			if (opt->Opcode == DHCP_REQUEST)
+			DHCP_OPTION_LIST ret;
+			LIST *o;
+			Zero(&ret, sizeof(ret));
+
+			ret.Opcode = DHCP_NACK;
+			ret.ServerAddress = v->HostIP;
+			StrCpy(ret.DomainName, sizeof(ret.DomainName), v->DhcpDomain);
+			ret.SubnetMask = v->DhcpMask;
+
+			// Build the DHCP option
+			o = BuildDhcpOption(&ret);
+			if (o != NULL)
 			{
-				// There is no IP address that can be provided
+				BUF *b = BuildDhcpOptionsBuf(o);
-				DHCP_OPTION_LIST ret;
+				if (b != NULL)
-				LIST *o;
-				Zero(&ret, sizeof(ret));
-
-				ret.Opcode = DHCP_NACK;
-				ret.ServerAddress = v->HostIP;
-				StrCpy(ret.DomainName, sizeof(ret.DomainName), v->DhcpDomain);
-				ret.SubnetMask = v->DhcpMask;
-
-				// Build the DHCP option
-				o = BuildDhcpOption(&ret);
-				if (o != NULL)
 				{
-					BUF *b = BuildDhcpOptionsBuf(o);
+					UINT dest_ip = p->L3.IPv4Header->SrcIP;
-					if (b != NULL)
+					if (dest_ip == 0)
 					{
-						UINT dest_ip = p->L3.IPv4Header->SrcIP;
+						dest_ip = 0xffffffff;
-						if (dest_ip == 0)
-						{
-							dest_ip = 0xffffffff;
-						}
-						// Transmission
-						VirtualDhcpSend(v, tran_id, dest_ip, Endian16(p->L4.UDPHeader->SrcPort),
-							ip, dhcp->ClientMacAddress, b, dhcp->HardwareType, dhcp->HardwareAddressSize);
-
-						// Release the memory
-						FreeBuf(b);
 					}
-					FreeDhcpOptions(o);
+					// Transmission
+					VirtualDhcpSend(v, tran_id, dest_ip, Endian16(p->L4.UDPHeader->SrcPort),
+					                ip, dhcp->ClientMacAddress, b, dhcp->HardwareType, dhcp->HardwareAddressSize);
+
+					// Release the memory
+					FreeBuf(b);
 				}
+				FreeDhcpOptions(o);
 			}
 		}
 	}