The easier method - less flexible but you don't need to muck around so much
They way you have configured qemu
appears to be the default host NAT network (aka. qemu -net nic -net user
configuration)
By default, your host (your Mac in this case) will be found on 10.0.2.2 when accessed from your guest. From inside your guest you can connect to services on your host (your MAC) at 10.0.2.2. But this is using NAT, so you can't go back the other way as easily.
For example, if you decide to you want to connect to the SSH service and a web server running inside your guest, you will need to start qemu
with modified options like the following:
qemu -net nic -net user,hostfwd=tcp::2222-:22,hostfwd=tcp::22280-:80
What this will do is route connections from port 22280 on your host (your MAC) to port 80 inside your qemu
guest, (same for port 2222 --> port 22 in the guest)
Which means you can browse to http://localhost:22280
on your Mac, to get to the web server in your virtual Raspberry Pi, etc.
FTP and SMB will be more complicated to setup this way because of the different ports used and they way they are used, etc. although if you setup FTP to use PASV mode it wont be too much of a problem.
The more complicated method
This involves doing what you suggested, configuring the virtual machine quest to be able to get an IP address from your router. In this case, you need to make a bridge from your virtual machine onto your hosts network.
This requires a lot more setup than can be quickly explained here, but essentially, you need to assign your NIC to a vlan and add a tap
interface, for example:
qemu -net nic,vlan=0 -net tap,ifname=tap0
This however requires more setup on the host (initially, manual, as you figure out your own situation, but then, scriptable) to create a bridge and tap interface - which usually requires root access beyond that needed to simply run qemu
. A bit of Googling brings up a variety of methods to do this, because it varies more depending on your setup. (I found an example setup script here: https://gist.github.com/EmbeddedAndroid/6572715 )
- Note - network MAC addresses, network card models, etc. and other
qemu
options omitted for clarity.
The SAMBA method
Note: I have only tried this under Linux
You can enable a samba server inside qemu:
qemu -smb /path/to/files
This creates a SMB share accessible from inside the guest at \10.0.2.4\qemu mapped from /path/to/files on the host.