Mozim -- DHCP Client Library

Still doing code sign, no real work this project can do yet. Check again in 2022.

DONE:

• raw socket with BPF applied and accepting all mac address.
• DHCP discovery and request.
• Renew, rebind.
• DHCP IP apply via cli tool mzc.
• Route
• Timeout and retry

TODO:

• Verify XID.
• Handle vendor difference: https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/848
• Support multiple DHCP servers with DHCPNAK reply.
• Support DHCPNAK
• Support DHCPDECLINE: Client to server indicating network address is already in use.
• Support DHCPINFORM: Client to server, asking only for local configuration parameters; client already has externally configured network address.
• Rate control -- Token bucket (RFC 2698)
• Initial sleep before discovery/solicit(need check RFC)

Try out

# Below script will create veth eth1/eth1.ep.
# The `eth1.ep` is DHCP server interface running dnsmasq in `mozim` network
# namespace.
sudo ./utils/test_env_mozim &
cargo run --example mozim_dhcpv4_async
cargo run --example mozim_dhcpv6_sync