router: misc changes

flake.nix

@@ -197,9 +197,11 @@
           hardware = inputs.nixos-hardware.nixosModules;
         } // args.specialArgs or { };
         modules = [
-          { _module.args = {
+          ({ config, ... }: {
+            _module.args = {
               pkgs-kernel = import inputs.nixpkgs-kernel { inherit (args) system; overlays = all-overlays ++ config.nixpkgs.overlays; };
-            }; }
+            };
+          })
           (getPrivSys hostname)
           { networking.hostName = lib.mkDefault hostname;
             nixpkgs.overlays = all-overlays; }

home/hosts/nixmsi.nix

@@ -81,6 +81,7 @@
     lalrpop
     tio
     tdesktop
+    osu-wine
   ];
   xdg.configFile."looking-glass/client.ini".text = ''
     [app]

system/hosts/router/a.py

@@ -0,0 +1,20 @@
+import traceback
+
+
+
+
+
+import pytricia  # type: ignore
+
+def build_ipset(ips: list[str]) -> pytricia.PyTricia:
+    pyt = pytricia.PyTricia()
+    for ip in ips:
+        try:
+            pyt.insert(ip, None)
+        except:
+            with open("/var/lib/unbound/error.log", "at") as f:
+                f.write(f"Warning: couldn't insert ip {ip}:\n")
+                traceback.print_exc(file=f)
+    return pyt
+
+s = build_ipset(["10.0.0.0/24"])

system/hosts/router/avahi-resolver-v2.py

@@ -230,6 +230,8 @@ MDNS_REJECT_TYPES: list[RdataType]
 MDNS_ACCEPT_TYPES: list[RdataType]
 MDNS_REJECT_NAMES: Optional[re.Pattern]
 MDNS_ACCEPT_NAMES: Optional[re.Pattern]
+REJECT_A: Optional[re.Pattern] = None
+REJECT_AAAA: Optional[re.Pattern] = None
 
 sysbus: pydbus.bus.Bus
 avahi: Any  # pydbus.proxy.ProxyObject
@@ -512,10 +514,26 @@ def build_ipset(ips: list[str]) -> pytricia.PyTricia:
     return pyt
 
 
+IP_Q = pytricia.PyTricia()
+IP_Q_LEN = 0
+
+
 def add_ips(set: str, ipv6: bool, ips: list[str], flush: bool = False):
+    global IP_Q, IP_Q_LEN
+    for ip in ips:
+        try:
+            IP_Q.insert(ip, None)
+        except:
+            with open("/var/lib/unbound/error.log", "at") as f:
+                f.write(f"Warning 2: couldn't insert ip {ip}:\n")
+                traceback.print_exc(file=f)
+    IP_Q_LEN += len(ips)
+    if IP_Q_LEN < 16:
+        return
     # with open('/var/lib/unbound/info.log', 'at') as f:
     # print('set', set, 'ipv6', ipv6, 'ips', ips, file=f)
-    pyt = build_ipset(ips)
+    pyt = IP_Q
+    IP_Q = pytricia.PyTricia()
     ruleset: list[dict] = []
     if flush:
         ruleset.append(
@@ -568,6 +586,7 @@ def add_ips(set: str, ipv6: bool, ips: list[str], flush: bool = False):
     # with open('/var/lib/unbound/info.log', 'at') as f:
     #     print('data', data, file=f)
     try:
+        if flush:
             out = subprocess.run(
                 ["/run/current-system/sw/bin/nft", "-j", "-f", "/dev/stdin"],
                 capture_output=True,
@@ -585,6 +604,15 @@ def add_ips(set: str, ipv6: bool, ips: list[str], flush: bool = False):
                     f.write(b"\nstderr:\n")
                     f.write(out.stderr)
                     f.write(b"\n")
+        else:
+            proc = subprocess.Popen(
+                ["/run/current-system/sw/bin/nft", "-j", "-f", "/dev/stdin"],
+                stdin=subprocess.PIPE,
+            )
+            assert proc.stdin is not None
+            proc.stdin.write(data)
+            proc.stdin.write(b"\n")
+            proc.stdin.close()
     except:
         with open("/var/lib/unbound/error.log", "at") as f:
             f.write(f"While adding ips for set {set}:\n")
@@ -595,7 +623,7 @@ def add_split_domain(domains: Domains, split_domain: list[str]):
     if not split_domain:
         return
     split_domain = split_domain[:]
-    if split_domain and split_domain[-1] == '*':
+    if split_domain and split_domain[-1] == "*":
         split_domain.pop()
     if not split_domain:
         return
@@ -644,6 +672,15 @@ def init(*args: Any, **kwargs: Any):
     global MDNS_REJECT_TYPES, MDNS_ACCEPT_TYPES
     global MDNS_REJECT_NAMES, MDNS_ACCEPT_NAMES
     global NFT_QUERIES, NFT_TOKEN, DOMAIN_NAME_OVERRIDES
+    global REJECT_A, REJECT_AAAA
+
+    w = os.environ.get("REJECT_A", None)
+    if w is not None:
+        REJECT_A = re.compile(w)
+
+    w = os.environ.get("REJECT_AAAA", None)
+    if w is not None:
+        REJECT_AAAA = re.compile(w)
 
     domain_name_overrides: str = os.environ.get("DOMAIN_NAME_OVERRIDES", "")
     if domain_name_overrides:
@@ -867,11 +904,11 @@ def operate(id, event, qstate, qdata) -> bool:
                 for i in range(rep.rrset_count):
                     d = rep.rrsets[i].entry.data
                     rk = rep.rrsets[i].rk
-                    for j in range(0, d.count + d.rrsig_count):
-                        wire = array.array("B", d.rr_data[j]).tobytes()
                     # IN
                     if rk.rrset_class != 256:
                         continue
+                    for j in range(0, d.count + d.rrsig_count):
+                        wire = array.array("B", d.rr_data[j]).tobytes()
                         # A, AAAA
                         if (
                             rk.type == 256
@@ -968,6 +1005,57 @@ def operate(id, event, qstate, qdata) -> bool:
 
     qstate.ext_state[id] = MODULE_FINISHED
 
+    rej_a = REJECT_A and REJECT_A.match(n2)
+    rej_aaaa = REJECT_AAAA and REJECT_AAAA.match(n2)
+    if rej_a or rej_aaaa:
+        if qstate.return_msg and qstate.return_msg.rep:
+            rep = qstate.return_msg.rep
+            have_other = False
+            changed = False
+            msg = DNSMessage(
+                qstate.qinfo.qname_str,
+                qstate.qinfo.qtype,
+                qstate.qinfo.qclass,
+                qstate.query_flags,
+            )
+            for i in range(rep.rrset_count):
+                d = rep.rrsets[i].entry.data
+                rk = rep.rrsets[i].rk
+                if rk.rrset_class == 256 and (
+                    rej_a and rk.type == 256 or rej_aaaa and rk.type == 7168
+                ):
+                    changed = True
+                    continue
+                if rk.rrset_class == 256 and (
+                    rej_aaaa
+                    and not rej_a
+                    and rk.type == 256
+                    or rej_a
+                    and not rej_aaaa
+                    and rk.type == 7168
+                ):
+                    have_other = True
+                # IN
+                for j in range(0, d.count):
+                    if rk.type == 256 and rej_a:
+                        continue
+                    elif rk.type == 7168 and rej_aaaa:
+                        continue
+                    msg.answer.append(
+                        rr2text(
+                            (rk.dname_str, rk.rrset_class, rk.type, d.rr_data[j]), d.ttl
+                        )
+                    )
+            if changed and not have_other:
+                # reject
+                qstate.ext_state[id] = MODULE_ERROR
+                return True
+            elif changed:
+                # replace
+                if not msg.set_return_msg(qstate):
+                    qstate.ext_state[id] = MODULE_ERROR
+                return True
+
     # Only resolve via Avahi if we got NXDOMAIN from the upstream DNS
     # server, or if we could not reach the upstream DNS server. If we
     # got some records for the name from the upstream DNS server

system/hosts/router/default.nix

@@ -473,8 +473,8 @@ in {
       gateways = [ netAddresses.lan6 ];
       radvdSettings.AdvAutonomous = true;
       coreradSettings.autonomous = true;
-      # don't allocate addresses for most devices
+      # # don't allocate addresses for most devices
-      keaSettings.pools = [ ];
+      # keaSettings.pools = [ ];
       # just assign the reservations
       keaSettings.reservations = map (res:
       (if res.duid != null then { duid = res.duid; } else { hw-address = res.macAddress; }) // {
@@ -597,20 +597,21 @@ in {
           [(is.eq ip.saddr "@block4") (log "block4/s ") drop]
           [(is.eq ip6.saddr "@block6") (log "block6/s ") drop]
           # default to no vpn...
-          [(mangle meta.mark wan_table)]
+          # [(mangle meta.mark wan_table)]
-          # # default to vpn...
+          # default to vpn...
-          # [(mangle meta.mark vpn_table)]
+          [(mangle meta.mark vpn_table)]
+          [(is.eq meta.mark 0)]
+          # ...but unvpn traffic to/from force_unvpn4/force_unvpn6
+          [(is.eq ip.daddr "@force_unvpn4") (mangle meta.mark wan_table)]
+          [(is.eq ip6.daddr "@force_unvpn6") (mangle meta.mark wan_table)]
+          [(is.eq ip.saddr "@force_unvpn4") (mangle meta.mark wan_table)]
+          [(is.eq ip6.saddr "@force_unvpn6") (mangle meta.mark wan_table)]
           # ...force vpn to/from force_vpn4/force_vpn6
           # (disable this if it breaks some sites)
           [(is.eq ip.daddr "@force_vpn4") (mangle meta.mark vpn_table)]
           [(is.eq ip6.daddr "@force_vpn6") (mangle meta.mark vpn_table)]
           [(is.eq ip.saddr "@force_vpn4") (mangle meta.mark vpn_table)]
           [(is.eq ip6.saddr "@force_vpn6") (mangle meta.mark vpn_table)]
-          # ...but unvpn traffic to/from force_unvpn4/force_unvpn6
-          [(is.eq ip.daddr "@force_unvpn4") (mangle meta.mark wan_table)]
-          [(is.eq ip6.daddr "@force_unvpn6") (mangle meta.mark wan_table)]
-          [(is.eq ip.saddr "@force_unvpn4") (mangle meta.mark wan_table)]
-          [(is.eq ip6.saddr "@force_unvpn6") (mangle meta.mark wan_table)]
           # block requests to port 25 from hosts other than the server so they can't send mail pretending to originate from my domain
           # only do this for lans since traffic from other interfaces isn't forwarded to wan
           [(is.eq meta.iifname lanSet) (is.ne ether.saddr cfg.serverMac) (is.eq meta.l4proto (f: f.tcp)) (is.eq tcp.dport 25) (log "smtp ") drop]