Ethernet

The packet with MORSE address TO comes from the MORSE network.

Mask conversion of addresses

The MORSE address TO is compared with the parameter (b)ase in those parts where the MAS(K) has zeroes (in bits). If there is a match the address IPdest is created by masking.

The MORSE address TO is compared with the parameter (b)ase in those parts where the MAS(K) has zeroes (in bits). If there is a match the address IPdest is created by masking.

For bits where there are ones in the MAS(K) there must be zeroes in the (b)ase.

For mask conversion of an address Sec(u)rity:OFF is required.

Conversion of addresses via table Art

If the conditions for mask conversion of an address were not complied with then table Art is used.

In the (A)rt table pertaining to M-IP-M mode the IPdest address is determined according to the MORSE address TO.

If the TO address isn’t in the table then default gw is used from this table.

The next direction in the IP network is determined according to destination IP address with help of parameters from the first part of menu Etp. If the condition

(IPdest & (n)et mask) = ((i)p adr & (n)et mask)

is fulfilled then the packet is sent to the destination IP address. If the condition is not fulfilled then the packet is sent to the address (g)ateway adr.

The MORSE packet is completed with the IP header and is sent to the IP network. The following parameters can be used:

The packets travels according to IP network rules.

Upon output from the IP network the IP header is removed and the packet is handed to the MORSE network and continues on its way according to MORSE routing.

	Note
	By using the write(E)nable:OFF parameter we can disable the automatically fulfilling of Art table, which comes up in some modes.

The packet with destination address IPdest comes from the IP network to my address MyIP.

The MORSE address is found in next steps:

Art

The Morse address gw is found in table (I)PArt according to the IPdest address, which signifies the destination address in the MORSE network.

Mask

If the IPdest is not found in the left column of (I)PArt, then comparison of the addresses (b)ase from IP-M-IP menu and IPdest is made by application of the bit-inverted value of (m)ask, thus

((b)ase & ~(m)ask) = (IPdest & ~(m)ask)

If this condition is fulfilled, then the destination MORSE address Morsedst is determined as my Morse address MyMorse masked by the bit-inverted value (m)ask completed by IPdst masked by (m)ask thus

Morsedst = (MyMorse & ~(m)ask) | (IPdst & (m)ask)

Example 1:

 MyIP       192.168.15.128  C0 A8 0F 80
 IPdst      192.168.15.04   C0 A8 0F 04
 (m)ask     0xFF            00 00 00 FF
            condition fulfilled
 MyMorse                    69 0F 90 43
 Morsedst >>                69 0F 90 04

Default gw

If the condition is not fulfilled or if (m)ask = 00000000, then the address default gw is used from (I)PArt table.

Example 2:

 MyIP       192.168.15.128  C0 A8 0F 80
 IPdst      192.168.05.06   C0 A8 05 06
 (m)ask     0xFF            00 00 00 FF
            condition is not fulfilled
 ART1 default gw            69 3A 00 00
 Morsedst >>                69 3A 00 00

IP packet is completed by the MORSE header and is sent in MORSE network to the destination address.

The packet goes through the network according to MORSE routing.

At the output point from the MORSE network in the CU, which has Morse address Morsedst and simultaneously IP address CUadrIP the MORSE head is removed.

The next routing in the IP network is defined according to the destination IP address with use of the parameters from the first part of menu Etp. If the condition

( IPdest & (n)et mask ) = ( CUadrIP & (n)et mask )

is fulfilled then the packet is sent to the destination IP address.

Example 3:

 CUadrIP                         C0 A8 0F 20
 packet's IPdst                  C0 A8 0F 04
 (n)et mask                      FF FF FF 00
                  condition
                  fulfilled
 packet send to IP               C0 A8 0F 04

If the condition is not fulfilled, then the packet is sent to the Ethernet address which has the equipment with IP address (g)ateway adr.

Example 4:

 CUadrIP                         C0 A8 0F 20
 packet's IPdst                  C0 A8 10 04
 (n)et mask                      FF FF FF 00
                  condition is
                  not fulfilled
 (g)ateway adr                   C0 A8 0F 00
 packet send to IP               C0 A8 0F 00

The packet with destination MORSE address MasMorse, which belongs to the application server, comes from the MORSE network.

Check as to whether it fulfils the condition

(MasMorse & ~(M)ask) = ((B)ase & ~(M)ask)

If yes then the packet is sent to the Morse Application Server, if not then it is sent to IP_M_IP. The next condition for MAppS is the user packet type (user_data 0x09, prot_data 0x0A), not the retranslation.

In the table (s)Art belonging to Morse App. Server the item gw is found according to the destination MORSE address and then it is processed as follows:

The packet is sent to the IP address and UDP port created in this way.

So the packet coming from MORSE network to the MAS (Morse Appl. Server) contains MORSE addresses src and dst. After processing in MAS it contains the IP address, UDP port number and src MORSE addr.

	Note
	By using the write(e)nable:OFF parameter we can disable the automatically fulfilling of Art table, which comes up in some modes.

The packet with destination MORSE address MorseDst comes from the application (daemon) running on the address IPAddr and port AppPort.

The items AppPort and IPAddr are assembled to create the gw , which is found in the Art table. The 14 LSB from IPAddr creates the right part of gw , the bit No 15 is 1 for broadcast, the bit No 16 is 0 for manually created Art, the bits No 17 to 32 are borrowed from AppPort.

The created item gw is used to found the respective item dest in the Art table. The founded item dest becomes the source address in the MORSE packet, which is sent into MORSE network.

So if the application sends the report back through MAS to the MORSE network, then it contains the IP address of the application, UDP port number and dst MORSE address. After processing in MAS it contains MORSE addresses src and dst.

After unseccesful searching in the gw collumn in Art table

is found the address 00000000 in the dest collumn. The item gw belongs to this address, e.g. 22B86420, where 22B8 is the choosen standard port number and 6420 is the low part of Application IP address. This pair

00000000 22B86420 must be located on the end of Art table, so the pair mentioned in next point e.g.: 744901BB 22B86420 appears above it.

This item 22B86420 is then found in the gw collumn and the item dest 744901BB belonging to it becomes the MORSE address source in the sent packet.