macOS provides networking API for VMs called vmnet.framework. I tried to add it as a network backend. All three modes are supported:
-shared: allows the guest to comminicate with other guests in shared mode and also with external network (Internet) via NAT -host: allows the guest to communicate with other guests in host mode -bridged: bridges the guest with a physical network interface Separate netdev for each vmnet mode was created because they use quite different settings, especially since macOS 11.0 when vmnet.framework gets a lot of updates. Not sure that I use qemu_mutex_lock_iothread() and qemu_mutex_unlock_iothread() in correct way while sending packet from vmnet interface to QEMU. I'll be happy to receive recomendations how to make this thing better if I done sth wrong. Also vmnet.framework requires com.apple.vm.networking entitlement to run without root priveledges. Ad-hoc signing does not fit there, so I didn't touch anything related to signing. As a result we should run qemu-system by a priviledged user: `$ sudo qemu-system-x86_64 -nic vmnet-shared` otherwise vmnet fails with 'general failure'. But in any way it seems working now, I tested it within qemu-system-x86-64 on macOS 10.15.7 host, with nic models: - e1000-82545em - virtio-net-pci and having such guests: - macOS 10.15.7 - Ubuntu Bionic (server cloudimg) Vladislav Yaroshchuk (7): net/vmnet: dependencies setup, initial preparations net/vmnet: add new netdevs to qapi/net net/vmnet: create common netdev state structure net/vmnet: implement shared mode (vmnet-shared) net/vmnet: implement host mode (vmnet-host) net/vmnet: implement bridged mode (vmnet-bridged) net/vmnet: update qemu-options.hx configure | 31 +++++ meson.build | 5 + net/clients.h | 11 ++ net/meson.build | 7 ++ net/net.c | 10 ++ net/vmnet-bridged.m | 123 ++++++++++++++++++ net/vmnet-common.m | 294 ++++++++++++++++++++++++++++++++++++++++++++ net/vmnet-host.c | 93 ++++++++++++++ net/vmnet-shared.c | 94 ++++++++++++++ net/vmnet_int.h | 48 ++++++++ qapi/net.json | 99 ++++++++++++++- qemu-options.hx | 17 +++ 12 files changed, 830 insertions(+), 2 deletions(-) create mode 100644 net/vmnet-bridged.m create mode 100644 net/vmnet-common.m create mode 100644 net/vmnet-host.c create mode 100644 net/vmnet-shared.c create mode 100644 net/vmnet_int.h -- 2.23.0
