badvpn/ncd/examples/network.ncd

# An example NCD script for network configuration.
#
# The first three processes demonstrate different kinds of interfaces
# and configurations. They are all disabled by default.
#
# The last process waits for one of the interfaces to come up
# and sets up routes and DNS entries to use that interface for
# Internet access.
#
# Be sure to change the dependency list in the last process to name
# the interfaces you use.

# Example wired interface with static configuration.
process wired_example_static {
    if("false"); # remove/comment to enable

    # Set device.
    var("eth0") dev;

    # Wait for device.
    net.backend.waitdevice(dev);
    net.up(dev);
    net.backend.waitlink(dev);

    # Static configuration.
    var("192.168.111.116") addr;
    var("24") addr_prefix;
    var("192.168.111.1") gateway;
    var({"192.168.111.14", "193.2.1.66"}) dns_servers;

    # Assign IP address.
    net.ipv4.addr(dev, addr, addr_prefix);

    # Go on configuring the network.
    concat("NET-", dev) provide_name;
    multiprovide(provide_name);
}

# Example wired interface with DHCP configuration.
process wired_example_dhcp {
    if("false"); # remove/comment to enable

    # Set device.
    var("eth1") dev;

    # Wait for device.
    net.backend.waitdevice(dev);
    net.up(dev);
    net.backend.waitlink(dev);

    # DHCP configuration.
    net.ipv4.dhcp(dev) dhcp;
    ip_in_network(dhcp.addr, "127.0.0.0", "8") test_local;
    ifnot(test_local);
    var(dhcp.addr) addr;
    var(dhcp.prefix) addr_prefix;
    var(dhcp.gateway) gateway;
    var(dhcp.dns_servers) dns_servers;

    # Assign IP address.
    net.ipv4.addr(dev, addr, addr_prefix);

    # Go on configuring the network.
    concat("NET-", dev) provide_name;
    multiprovide(provide_name);
}

# Example wireless interface with DHCP configuration.
# This will use the wpa_supplicant configuration file /etc/wpa_supplicant/all.conf
# which should specify the wireless networks and other options.
process wireless_example_dhcp {
    if("false"); # remove/comment to enable

    # Set device.
    var("wlan0") dev;

    # Wait for device and rfkill.
    net.backend.waitdevice(dev);
    net.backend.rfkill("wlan", dev);

    # Connect to wireless network.
    net.backend.wpa_supplicant(dev, "/etc/wpa_supplicant/all.conf", "/usr/sbin/wpa_supplicant", {});

    # DHCP configuration.
    net.ipv4.dhcp(dev) dhcp;
    ip_in_network(dhcp.addr, "127.0.0.0", "8") test_local;
    ifnot(test_local);
    var(dhcp.addr) addr;
    var(dhcp.prefix) addr_prefix;
    var(dhcp.gateway) gateway;
    var(dhcp.dns_servers) dns_servers;

    # Assign IP address.
    net.ipv4.addr(dev, addr, addr_prefix);

    # Go on configuring the network.
    concat("NET-", dev) provide_name;
    multiprovide(provide_name);
}

# This process sets up routes and DNS servers for at most one of
# the working interfaces. It will change the configuration of a more
# important interface comes up after one is already up.
process NETCONF {
    # Choose devices and priorities; put preferred devices to the front.
    var({"NET-eth0", "NET-eth1", "NET-wlan0"}) provide_names;

    # Wait for one of the interfaces (and deinit/switch appropriately).
    multidepend(provide_names) ifdep;

    # Alias device values.
    var(ifdep.dev) dev;
    var(ifdep.addr) addr;
    var(ifdep.addr_prefix) addr_prefix;
    var(ifdep.gateway) gateway;
    var(ifdep.dns_servers) dns_servers;

    # Add default route.
    net.ipv4.route("0.0.0.0", "0", gateway, "20", dev);

    # Configure DNS servers.
    net.dns(dns_servers, "20");
}