modules/dns64: improve code readability

diff --git a/modules/dns64/dns64.lua b/modules/dns64/dns64.lua
index 4b3403354af06e33b32ab86d45f97225a0d17786..964bea6b0b470750b5f6330242b5874097ebf9d6 100644 (file)
--- a/modules/dns64/dns64.lua
+++ b/modules/dns64/dns64.lua
@@ -184,19 +184,19 @@ function M.layer.produce(_, req, pkt)
        local labels_missing = 16*2 + 2 - ffi.C.knot_dname_labels(sname, nil)
        if labels_missing == 0 then
                -- Transforming v6 labels (hex) to v4 ones (decimal) isn't trivial:
-               local l = sname
+               local labels = sname
                local v4name = ''
                for _ = 1, 4 do -- append one IPv4 label at a time into v4name
-                       local v4lab = 0
+                       local v4octet = 0
                        for i = 0, 1 do
-                               if l[0] ~= 1 then return end
-                               local ch = hexchar2int(l[1])
+                               if labels[0] ~= 1 then return end
+                               local ch = hexchar2int(labels[1])
                                if not ch then return end
-                               v4lab = v4lab + ch * 16^i
-                               l = l + 2
+                               v4octet = v4octet + ch * 16^i
+                               labels = labels + 2
                        end
-                       v4lab = tostring(v4lab)
-                       v4name = v4name .. string.char(#v4lab) .. v4lab
+                       v4octet = tostring(v4octet)
+                       v4name = v4name .. string.char(#v4octet) .. v4octet
                end
                v4name = v4name .. '\7in-addr\4arpa\0'
                if not pkt:put(sname, M.rev_ttl, kres.class.IN, kres.type.CNAME, v4name)
@@ -209,7 +209,7 @@ function M.layer.produce(_, req, pkt)
        else
                pkt:rcode(kres.rcode.NOERROR)
        end
-       pkt.parsed = pkt.size;
+       pkt.parsed = pkt.size
        pkt:aa(true)
        pkt:qr(true)
        qry.flags.CACHED = true