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Very similar process happens when a packet's destination is router (routing input): Packet enters prerouting processing:
1. - check if there is a hotspot and modify the packet for hotspot use;
2. - process packet through RAW prerouting chain;
3. - send packet through connection tracking;
4. - process packet through Mangle prerouting chain;
5. - process packet through NATs dst-nat chain;
Run packet through routing table to make routing decision;
Packet enters forward process;
1. - check TTL value;
2. - process packet through Mangle forward chain;
3. - process packet through Filter forward chain;
4. - send packet to accounting processes;
Packet enters postrouting process;
1. - process packet through Mangle postrouting chain;
2. - process packet through NATs src-nat chain;
3. - if there is a hotspot undo any modifications made in hotspot-in;
4. - process packet through queue tree (HTB Global);
5. - process packet through simple queues;
Check if there is IPsec and process through IPsec policies;

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Or when a packet is originated from the router (routing output):

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The packet is originated from the router itself
1. packet goes through the routing table to make a routing decision
A packet enters output process
1. process packet through the Bridge decision;
2. send packet through connection tracking;
3. process packet through Mangle output chain;
4. process packet through Filter output chain;
5. send packet to routing adjustment ( policy routing)
Packet enters postrouting process;
1. - process packet through Mangle postrouting chain;
2. - process packet through NATs src-nat chain;
3. - if there is a hotspot undo any modifications made in hotspot-in;
4. - process packet through queue tree (HTB Global);
5. - process packet through simple queues;
Check if there are IPsec and process through IPsec policies;TODO

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Flow of Bridged Packet

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