[Bug] All network interfaces are not displayed

[red7nikotin]

Description

1. My smartphone has 2 SIM cards, and accordingly, when I activate 4G on them, I receive dynamically determined IP addresses from the operator (10.1.100.25, 10.2.200.25).
2. I can turn on the network distribution mode via WiFi, then all the devices that will connect to my smartphone will have other ip addresses (192.168.45.25).
3. I can turn on the network distribution mode via Etherne-USB, then all the devices that will connect to my smartphone will have other ip addresses (192.168.35.25).
4. If my smartphone does not distribute the network via USB, but rather receives it through this connection, then I get other ip addresses (192.168.0.25).

Thus, using all or some of these options, I can have several current ip addresses at the same time, but the problem is that your program always displays only one single ip address and there is no way to switch to another network interface or change the ip address itself to a static one for the most basic default VM. Podroid itself

Steps to Reproduce

In one case, I need to receive the Internet from 4G and distribute it via WiFi or Ethernet-USB, and in another case, I need to receive the Internet from Ethernet-USB and distribute it via WiFi, and I don't understand at all which addresses to use and which ports to throw and generally how your program works, because nothing It's working!
I can only randomly iterate through all the ip addresses to connect only via SSH. but I don't understand how to set up a connection using other protocols and ports - it just doesn't work!

Yes, I see that there is a port forwarding functionality - it works both from the GUI and in the console, but the problem is that I have several networks and apparently the traffic is going to the wrong place, so I can't distribute the simplest FTP, SAMBA, NFS protocols.

Expected Behavior

1. Select the network adapter that will be the main one for connecting to my virtual machine.
2. The ability to set your own static ip address for a virtual machine
3. Inside the virtual machine itself, see the real ip address from the real network (I suppose this could be done through macvlan technology so that my virtual machine would have its own MAC address different from the MAC address of the smartphone itself)

Actual Behavior

I see only one network interface, and at the same time it refers to 4G, and my local one is not available from a regular USB or Wifi network, so it is unclear how to contact my virtual machine from other PCs.

Additional Context

Add any other context about the problem here.

[ExTV]

You found a real bug, and the diagnosis is a bit more interesting than "one address is missing". Thank you for the detailed write-up, the multi-SIM plus tethering setup is what made the cause obvious.

What was wrong

Podroid asked Android for "the address traffic leaves through", meaning the default route. When your phone is on 4G and simultaneously sharing that connection over WiFi or USB, the default route is the cellular one. So the app displayed the 4G address, which is exactly the address your PCs cannot reach. That matches your report precisely.

There is a second layer that made it unfixable by simply preferring WiFi over cellular. When the phone is the one providing the network, the tethering interface is a downstream where the phone is the gateway, not a network the phone is a client of. Android does not list those interfaces among the phone's own networks at all, so no reordering of preferences would ever have surfaced 192.168.45.25 or 192.168.35.25. Reading the network interfaces directly is the only way to see them.

The part that should save you time right now

Port forwards already listen on all interfaces, not just one. So your forwarding rules were almost certainly working the whole time, on every one of your networks. You were told an address that could not work and then had to guess the rest, which is why "randomly iterate through all the ip addresses" was the only thing that got you a connection.

Concretely: a rule forwarding host port 2121 will accept connections on 192.168.45.25:2121 and 192.168.35.25:2121 and 192.168.0.25:2121 at the same time. Use whichever address is on the same network as the PC you are connecting from.

What is fixed

The Status screen now lists every reachable address with the interface carrying it, instead of just one:

Phone IP          192.168.100.18
Also on rmnet17   10.19.33.254

Addresses that exist but cannot serve a peer are deliberately left out, so the list stays trustworthy: link-local autoconf addresses, and the special range carriers use internally on IPv6-only mobile networks. This will be in the next release.

Your other two requests

I would rather answer these straight than leave you waiting on something that is not coming.

A static IP for the VM is a reasonable request and is not implemented today. The guest's address comes from the backend's own networking, so this needs real work rather than a setting. I am leaving this issue open to track it.

macvlan, so the VM has its own MAC address and appears as a separate device on your LAN, is not possible in Podroid as it stands. It needs a bridge or TAP interface on the host side, and an app without root gets neither on Android. The QEMU backend uses a userspace NAT stack precisely because it cannot create real network interfaces, and the AVF backend's interface is owned by the system, not by the app. This is a genuine limitation and not something I can work around; it would require root.

So the display bug is fixed and your forwards should work once you use the matching address. The static IP request stays open, and macvlan I have to decline for now.