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liminix/rotuer.nix

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Nix

# This is not part of Liminix per se. This is my "scratchpad"
# configuration for the device I'm testing with.
#
# Parts of it do do things that Liminix eventually needs to do, but
# don't look in here for solutions - just for identifying the
# problems.
{ config, pkgs, lib, ... } :
let
secrets = import ./rotuer-secrets.nix;
inherit (pkgs.liminix.networking)
address
bridge
dnsmasq
hostapd
interface
pppoe
route;
inherit (pkgs.liminix.services) oneshot longrun bundle target;
inherit (pkgs)
waitup
serviceFns
iptables;
in rec {
services.loopback =
let iface = interface { type = "loopback"; device = "lo";};
in bundle {
name = "loopback";
contents = [
(address iface { family = "inet4"; address ="127.0.0.1"; prefixLength = 8;})
(address iface { family = "inet6"; address ="::1"; prefixLength = 128;})
];
};
boot = {
tftp = {
enable = true;
serverip = "10.0.0.1";
ipaddr = "10.0.0.8";
};
};
imports = [
./modules/wlan.nix
./modules/phram.nix
];
kernel = {
config = {
PPP = "y";
PPP_BSDCOMP = "y";
PPP_DEFLATE = "y";
PPP_ASYNC = "y";
PPP_SYNC_TTY = "y";
BRIDGE = "y";
NETFILTER_XT_MATCH_CONNTRACK = "y";
IP6_NF_IPTABLES= "y";
IP_NF_IPTABLES= "y";
IP_NF_NAT = "y";
IP_NF_TARGET_MASQUERADE = "y";
NETFILTER = "y";
NETFILTER_ADVANCED = "y";
NETFILTER_XTABLES = "y";
NFT_COMPAT = "y";
NFT_CT = "y";
NFT_LOG = "y";
NFT_MASQ = "y";
NFT_NAT = "y";
NFT_REJECT = "y";
NFT_REJECT_INET = "y";
NF_CONNTRACK = "y";
NF_NAT = "y";
NF_NAT_MASQUERADE = "y";
NF_TABLES= "y";
NF_TABLES_INET = "y";
NF_TABLES_IPV4 = "y";
NF_TABLES_IPV6 = "y";
};
};
services.lan =
let iface = interface {
type = "bridge";
device = "lan";
};
in address iface {
family = "inet4"; address ="10.8.0.1"; prefixLength = 16;
};
services.wireless = interface {
type = "hardware";
device = "wlan0";
dependencies = [ config.services.wlan_module ];
};
services.wired = interface {
type = "hardware";
device = "eth0";
primary = services.lan;
};
services.hostap = hostapd (services.wireless) {
params = {
ssid = "liminix";
country_code = "GB";
hw_mode="g";
channel = "2";
wmm_enabled = 1;
ieee80211n = 1;
inherit (secrets) wpa_passphrase;
auth_algs = 1; # 1=wpa2, 2=wep, 3=both
wpa = 2; # 1=wpa, 2=wpa2, 3=both
wpa_key_mgmt = "WPA-PSK";
wpa_pairwise = "TKIP CCMP"; # auth for wpa (may not need this?)
rsn_pairwise = "CCMP"; # auth for wpa2
};
};
services.bridgewlan =
let waitup-wlan = longrun {
name = "waitup-wlan0";
run = "${waitup}/bin/waitup wlan0 10";
notification-fd = 10;
dependencies = [ services.wireless services.hostap ];
};
in oneshot {
name = "add-wlan-to-bridge";
up = "ip link set dev ${services.wireless.device} master ${services.lan.device}";
down = "ip link set dev ${services.wireless.device} nomaster";
dependencies = [ waitup-wlan ];
};
users.dnsmasq = {
uid = 51; gid= 51; gecos = "DNS/DHCP service user";
dir = "/run/dnsmasq";
shell = "/bin/false";
};
groups.dnsmasq = {
gid = 51; usernames = ["dnsmasq"];
};
groups.system.usernames = ["dnsmasq"];
services.dns =
dnsmasq {
resolvconf = services.resolvconf;
interface = services.lan;
ranges = ["10.8.0.10,10.8.0.240"];
domain = "fake.liminix.org";
};
services.wan =
let iface = interface { type = "hardware"; device = "eth1"; };
in pppoe iface {
ppp-options = [
"debug" "+ipv6" "noauth"
"name" secrets.l2tp.name
"password" secrets.l2tp.password
];
};
services.resolvconf = oneshot rec {
dependencies = [ services.wan ];
name = "resolvconf";
up = ''
. ${serviceFns}
( cd `mkoutputs ${name}`; umask 0027
echo "nameserver $(output ${services.wan} ns1)" > resolv.conf
echo "nameserver $(output ${services.wan} ns2)" >> resolv.conf
)
'';
down = ''
rm -rf /run/service-state/${name}/
'';
};
services.defaultroute4 = route {
name = "defaultroute";
via = "$(output ${services.wan} address)";
target = "default";
dependencies = [ services.wan ];
};
services.packet_forwarding =
let filename = "/proc/sys/net/ipv4/conf/all/forwarding";
in oneshot {
name = "let-the-ip-flow";
up = ''
${pkgs.nftables}/bin/nft -f ${./nat.nft}
echo 1 > ${filename}
'';
down = "echo 0 > ${filename}";
};
services.default = target {
name = "default";
contents = with services; [
loopback
wired
wireless
lan
hostap
defaultroute4
packet_forwarding
dns
bridgewlan
resolvconf
];
};
defaultProfile.packages = with pkgs; [ nftables strace tcpdump ] ;
}