diff options
Diffstat (limited to 'applications/luci-app-splash/root/usr/sbin')
| -rwxr-xr-x | applications/luci-app-splash/root/usr/sbin/luci-splash | 751 |
1 files changed, 751 insertions, 0 deletions
diff --git a/applications/luci-app-splash/root/usr/sbin/luci-splash b/applications/luci-app-splash/root/usr/sbin/luci-splash new file mode 100755 index 000000000..6b1e41edb --- /dev/null +++ b/applications/luci-app-splash/root/usr/sbin/luci-splash @@ -0,0 +1,751 @@ +#!/usr/bin/lua + +utl = require "luci.util" +sys = require "luci.sys" + +require("luci.model.uci") +require("luci.sys.iptparser") + +-- Init state session +local uci = luci.model.uci.cursor_state() +local ipt = luci.sys.iptparser.IptParser() +local net = sys.net +local fs = require "luci.fs" +local ip = require "luci.ip" + +local debug = false + +local has_ipv6 = fs.access("/proc/net/ipv6_route") and fs.access("/usr/sbin/ip6tables") + +function exec(cmd) + -- executes a cmd and gets its output + if debug then + local ret = sys.exec(cmd) + print('+ ' .. cmd) + if ret and ret ~= "" then + print(ret) + end + else + local ret = sys.exec(cmd .. " &> /dev/null") + end +end + +function call(cmd) + -- just calls a command + if debug then + print('+ ' .. cmd) + end + os.execute(cmd) +end + + +function lock() + call("lock /var/run/luci_splash.lock") +end + +function unlock() + call("lock -u /var/run/luci_splash.lock") +end + +function get_id(ip) + local o3, o4 = ip:match("[0-9]+%.[0-9]+%.([0-9]+)%.([0-9]+)") + if o3 and 04 then + return string.format("%02X%s", tonumber(o3), "") .. string.format("%02X%s", tonumber(o4), "") + else + return false + end +end + +function update_stats(leased, whitelisted, whitelisttotal, blacklisted, blacklisttotal) + local leases = uci:get_all("luci_splash_leases", "stats") + uci:delete("luci_splash_leases", "stats") + uci:section("luci_splash_leases", "stats", "stats", { + leases = leased or (leases and leases.leases) or 0, + whitelisttotal = whitelisttotal or (leased and leases.whitelisttotal) or 0, + whitelistonline = whitelisted or (leases and leases.whitelistonline) or 0, + blacklisttotal = blacklisttotal or (leases and leases.blacklisttotal) or 0, + blacklistonline = blacklisted or (leases and leases.blacklistonline) or 0, + }) + uci:save("luci_splash_leases") +end + + +function get_device_for_ip(ipaddr) + local dev + uci:foreach("network", "interface", function(s) + if s.ipaddr and s.netmask then + local network = ip.IPv4(s.ipaddr, s.netmask) + if network:contains(ip.IPv4(ipaddr)) then + -- this should be rewritten to luci functions if possible + dev = utl.trim(sys.exec(". /lib/functions/network.sh; network_get_device IFNAME '" .. s['.name'] .. "'; echo $IFNAME")) + end + end + end) + return dev +end + +function get_physdev(interface) + local dev + dev = utl.trim(sys.exec(". /lib/functions/network.sh; network_get_device IFNAME '" .. interface .. "'; echo $IFNAME")) + return dev +end + + + +function get_filter_handle(parent, direction, device, mac) + local input = utl.split(sys.exec('/usr/sbin/tc filter show dev ' .. device .. ' parent ' .. parent) or {}) + local tbl = {} + local handle + for k, v in pairs(input) do + handle = v:match('filter protocol ip pref %d+ u32 fh (%d*:%d*:%d*) order') or v:match('filter protocol all pref %d+ u32 fh (%d*:%d*:%d*) order') + if handle then + local mac, mac1, mac2, mac3, mac4, mac5, mac6 + if direction == 'src' then + mac1, mac2, mac3, mac4 = input[k+1]:match('match ([%a%d][%a%d])([%a%d][%a%d])([%a%d][%a%d])([%a%d][%a%d])/ffffffff') + mac5, mac6 = input[k+2]:match('match ([%a%d][%a%d])([%a%d][%a%d])0000/ffff0000') + else + mac1, mac2 = input[k+1]:match('match 0000([%a%d][%a%d])([%a%d][%a%d])/0000ffff') + mac3, mac4, mac5, mac6 = input[k+2]:match('match ([%a%d][%a%d])([%a%d][%a%d])([%a%d][%a%d])([%a%d][%a%d])/ffffffff') + end + if mac1 and mac2 and mac3 and mac4 and mac5 and mac6 then + mac = "%s:%s:%s:%s:%s:%s" % { mac1, mac2, mac3, mac4, mac5, mac6 } + tbl[mac] = handle + end + end + end + if tbl[mac] then + handle = tbl[mac] + end + return handle +end + +function macvalid(mac) + if mac and mac:match( + "^[a-fA-F0-9][a-fA-F0-9]:[a-fA-F0-9][a-fA-F0-9]:" .. + "[a-fA-F0-9][a-fA-F0-9]:[a-fA-F0-9][a-fA-F0-9]:" .. + "[a-fA-F0-9][a-fA-F0-9]:[a-fA-F0-9][a-fA-F0-9]$" + ) then + return true + end + + return false +end + +function ipvalid(ipaddr) + if ipaddr then + return ip.IPv4(ipaddr) and true or false + end + + return false +end + +function main(argv) + local cmd = table.remove(argv, 1) + local arg = argv[1] + + limit_up = (tonumber(uci:get("luci_splash", "general", "limit_up")) or 0) * 8 + limit_down = (tonumber(uci:get("luci_splash", "general", "limit_down")) or 0) * 8 + + if ( cmd == "lease" or cmd == "add-rules" or cmd == "remove" or + cmd == "whitelist" or cmd == "blacklist" or cmd == "status" ) and #argv > 0 + then + if not (macvalid(arg) or ipvalid(arg)) then + print("Invalid argument. The second argument must " .. + "be a valid IPv4 or Mac Address.") + os.exit(1) + end + + lock() + + local arp_cache = net.arptable() + local leased_macs = get_known_macs("lease") + local blacklist_macs = get_known_macs("blacklist") + local whitelist_macs = get_known_macs("whitelist") + + for i, adr in ipairs(argv) do + local mac = nil + if adr:find(":") then + mac = adr:lower() + else + for _, e in ipairs(arp_cache) do + if e["IP address"] == adr then + mac = e["HW address"]:lower() + break + end + end + end + + if mac and cmd == "add-rules" then + if leased_macs[mac] then + add_lease(mac, arp_cache, true) + elseif blacklist_macs[mac] then + add_blacklist_rule(mac) + elseif whitelist_macs[mac] then + add_whitelist_rule(mac) + end + elseif mac and cmd == "status" then + print(leased_macs[mac] and "lease" + or whitelist_macs[mac] and "whitelist" + or blacklist_macs[mac] and "blacklist" + or "new") + elseif mac and ( cmd == "whitelist" or cmd == "blacklist" or cmd == "lease" ) then + if cmd ~= "lease" and leased_macs[mac] then + print("Removing %s from leases" % mac) + remove_lease(mac) + leased_macs[mac] = nil + end + + if cmd ~= "whitelist" and whitelist_macs[mac] then + if cmd == "lease" then + print('%s is whitelisted. Remove it before you can lease it.' % mac) + else + print("Removing %s from whitelist" % mac) + remove_whitelist(mac) + whitelist_macs[mac] = nil + end + end + + if cmd == "whitelist" and leased_macs[mac] then + print("Removing %s from leases" % mac) + remove_lease(mac) + leased_macs[mac] = nil + end + + if cmd ~= "blacklist" and blacklist_macs[mac] then + print("Removing %s from blacklist" % mac) + remove_blacklist(mac) + blacklist_macs[mac] = nil + end + + if cmd == "lease" and not leased_macs[mac] then + if not whitelist_macs[mac] then + print("Adding %s to leases" % mac) + add_lease(mac) + leased_macs[mac] = true + end + elseif cmd == "whitelist" and not whitelist_macs[mac] then + print("Adding %s to whitelist" % mac) + add_whitelist(mac) + whitelist_macs[mac] = true + elseif cmd == "blacklist" and not blacklist_macs[mac] then + print("Adding %s to blacklist" % mac) + add_blacklist(mac) + blacklist_macs[mac] = true + else + print("The mac %s is already %sed" %{ mac, cmd }) + end + elseif mac and cmd == "remove" then + if leased_macs[mac] then + print("Removing %s from leases" % mac) + remove_lease(mac) + leased_macs[mac] = nil + elseif whitelist_macs[mac] then + print("Removing %s from whitelist" % mac) + remove_whitelist(mac) + whitelist_macs[mac] = nil + elseif blacklist_macs[mac] then + print("Removing %s from blacklist" % mac) + remove_blacklist(mac) + blacklist_macs[mac] = nil + else + print("The mac %s is not known" % mac) + end + + else + print("Can not find mac for ip %s" % argv[i]) + end + end + unlock() + os.exit(0) + elseif cmd == "sync" then + sync() + os.exit(0) + elseif cmd == "list" then + list() + os.exit(0) + else + print("Usage:") + print("\n luci-splash list\n List connected, black- and whitelisted clients") + print("\n luci-splash sync\n Synchronize firewall rules and clear expired leases") + print("\n luci-splash lease <MAC-or-IP>\n Create a lease for the given address") + print("\n luci-splash blacklist <MAC-or-IP>\n Add given address to blacklist") + print("\n luci-splash whitelist <MAC-or-IP>\n Add given address to whitelist") + print("\n luci-splash remove <MAC-or-IP>\n Remove given address from the lease-, black- or whitelist") + print("") + + os.exit(1) + end +end + +-- Get current arp cache +function get_arpcache() + local arpcache = { } + for _, entry in ipairs(net.arptable()) do + arpcache[entry["HW address"]:lower()] = { entry["Device"]:lower(), entry["IP address"]:lower() } + end + return arpcache +end + +-- Get a list of known mac addresses +function get_known_macs(list) + local leased_macs = { } + + if not list or list == "lease" then + uci:foreach("luci_splash_leases", "lease", function(s) + if s.mac then + leased_macs[s.mac:lower()] = true + end + end) + end + + if not list or list == "whitelist" then + uci:foreach("luci_splash", "whitelist", function(s) + if s.mac then + leased_macs[s.mac:lower()] = true + end + end) + end + + if not list or list == "blacklist" then + uci:foreach("luci_splash", "blacklist", function(s) + if s.mac then + leased_macs[s.mac:lower()] = true + end + end) + end + return leased_macs +end + + +-- Helper to delete iptables rules +function ipt_delete_all(args, comp, off) + off = off or { } + for i, r in ipairs(ipt:find(args)) do + if comp == nil or comp(r) then + off[r.table] = off[r.table] or { } + off[r.table][r.chain] = off[r.table][r.chain] or 0 + + exec("iptables -t %q -D %q %d 2>/dev/null" + %{ r.table, r.chain, r.index - off[r.table][r.chain] }) + + off[r.table][r.chain] = off[r.table][r.chain] + 1 + end + end +end + +function ipt6_delete_all(args, comp, off) + off = off or { } + for i, r in ipairs(ipt:find(args)) do + if comp == nil or comp(r) then + off[r.table] = off[r.table] or { } + off[r.table][r.chain] = off[r.table][r.chain] or 0 + + exec("ip6tables -t %q -D %q %d 2>/dev/null" + %{ r.table, r.chain, r.index - off[r.table][r.chain] }) + + off[r.table][r.chain] = off[r.table][r.chain] + 1 + end + end +end + + +-- Convert mac to uci-compatible section name +function convert_mac_to_secname(mac) + return string.gsub(mac, ":", "") +end + +-- Add a lease to state and invoke add_rule +function add_lease(mac, arp, no_uci) + mac = mac:lower() + + -- Get current ip address + local ipaddr + for _, entry in ipairs(arp or net.arptable()) do + if entry["HW address"]:lower() == mac then + ipaddr = entry["IP address"] + break + end + end + + -- Add lease if there is an ip addr + if ipaddr then + local device = get_device_for_ip(ipaddr) + if not no_uci then + local leased = uci:get("luci_splash_leases", "stats", "leases") + if type(tonumber(leased)) == "number" then + update_stats(leased + 1, nil, nil, nil, nil) + end + + uci:section("luci_splash_leases", "lease", convert_mac_to_secname(mac), { + mac = mac, + ipaddr = ipaddr, + device = device, + limit_up = limit_up, + limit_down = limit_down, + start = os.time() + }) + uci:save("luci_splash_leases") + end + add_lease_rule(mac, ipaddr, device) + else + print("Found no active IP for %s, lease not added" % mac) + end +end + + +-- Remove a lease from state and invoke remove_rule +function remove_lease(mac) + mac = mac:lower() + + uci:delete_all("luci_splash_leases", "lease", + function(s) + if s.mac:lower() == mac then + + local leased = uci:get("luci_splash_leases", "stats", "leases") + if type(tonumber(leased)) == "number" and tonumber(leased) > 0 then + update_stats(leased - 1, nil, nil, nil, nil) + end + remove_lease_rule(mac, s.ipaddr, s.device, tonumber(s.limit_up), tonumber(s.limit_down)) + return true + end + return false + end) + + uci:save("luci_splash_leases") +end + + +-- Add a whitelist entry +function add_whitelist(mac) + uci:section("luci_splash", "whitelist", convert_mac_to_secname(mac), { mac = mac }) + uci:save("luci_splash") + uci:commit("luci_splash") + add_whitelist_rule(mac) +end + + +-- Add a blacklist entry +function add_blacklist(mac) + uci:section("luci_splash", "blacklist", convert_mac_to_secname(mac), { mac = mac }) + uci:save("luci_splash") + uci:commit("luci_splash") + add_blacklist_rule(mac) +end + + +-- Remove a whitelist entry +function remove_whitelist(mac) + mac = mac:lower() + uci:delete_all("luci_splash", "whitelist", + function(s) return not s.mac or s.mac:lower() == mac end) + uci:save("luci_splash") + uci:commit("luci_splash") + remove_lease_rule(mac) + remove_whitelist_tc(mac) +end + +function remove_whitelist_tc(mac) + uci:foreach("luci_splash", "iface", function(s) + local device = get_physdev(s['.name']) + if device and device ~= "" then + if debug then + print("Removing whitelist filters for %s interface %s." % {mac, device}) + end + local handle = get_filter_handle('ffff:', 'src', device, mac) + if handle then + exec('tc filter del dev "%s" parent ffff: protocol ip prio 1 handle %s u32' % { device, handle }) + else + print('Warning! Could not get a handle for %s parent :ffff on interface %s' % { mac, device }) + end + local handle = get_filter_handle('1:', 'dest', device, mac) + if handle then + exec('tc filter del dev "%s" parent 1:0 protocol ip prio 1 handle %s u32' % { device, handle }) + else + print('Warning! Could not get a handle for %s parent 1:0 on interface %s' % { mac, device }) + end + end + end) +end + +-- Remove a blacklist entry +function remove_blacklist(mac) + mac = mac:lower() + uci:delete_all("luci_splash", "blacklist", + function(s) return not s.mac or s.mac:lower() == mac end) + uci:save("luci_splash") + uci:commit("luci_splash") + remove_lease_rule(mac) +end + + +-- Add an iptables rule +function add_lease_rule(mac, ipaddr, device) + local id + if ipaddr then + id = get_id(ipaddr) + end + + exec("iptables -t mangle -I luci_splash_mark_out -m mac --mac-source %q -j RETURN" % mac) + + -- Mark incoming packets to a splashed host + -- for ipv4 - by iptables and destination + if id and device then + exec("iptables -t mangle -I luci_splash_mark_in -d %q -j MARK --set-mark 0x1%s -m comment --comment %s" % {ipaddr, id, mac:upper()}) + end + + --for ipv6: need to use the mac here + + if has_ipv6 then + exec("ip6tables -t mangle -I luci_splash_mark_out -m mac --mac-source %q -j MARK --set-mark 79" % mac) + if id and device and tonumber(limit_down) then + exec("tc filter add dev %s parent 1:0 protocol ipv6 prio 1 u32 match ether dst %s classid 1:%s" % {device, mac:lower(), id}) + end + end + + + if device and tonumber(limit_up) > 0 then + exec('tc filter add dev "%s" parent ffff: protocol all prio 2 u32 match ether src %s police rate %skbit mtu 6k burst 6k drop' % {device, mac, limit_up}) + end + + if id and device and tonumber(limit_down) > 0 then + exec("tc class add dev %s parent 1: classid 1:0x%s htb rate %skbit" % { device, id, limit_down }) + exec("tc qdisc add dev %s parent 1:%s sfq perturb 10" % { device, id }) + end + + exec("iptables -t filter -I luci_splash_filter -m mac --mac-source %q -j RETURN" % mac) + exec("iptables -t nat -I luci_splash_leases -m mac --mac-source %q -j RETURN" % mac) + if has_ipv6 then + exec("ip6tables -t filter -I luci_splash_filter -m mac --mac-source %q -j RETURN" % mac) + end +end + + +-- Remove lease, black- or whitelist rules +function remove_lease_rule(mac, ipaddr, device, limit_up, limit_down) + + local id + if ipaddr then + id = get_id(ipaddr) + end + + ipt:resync() + ipt_delete_all({table="mangle", chain="luci_splash_mark_in", options={"/*", mac:upper()}}) + ipt_delete_all({table="mangle", chain="luci_splash_mark_out", options={"MAC", mac:upper()}}) + ipt_delete_all({table="filter", chain="luci_splash_filter", options={"MAC", mac:upper()}}) + ipt_delete_all({table="nat", chain="luci_splash_leases", options={"MAC", mac:upper()}}) + if has_ipv6 then + ipt6_delete_all({table="mangle", chain="luci_splash_mark_out", options={"MAC", mac:upper()}}) + ipt6_delete_all({table="filter", chain="luci_splash_filter", options={"MAC", mac:upper()}}) + end + + if device and tonumber(limit_up) > 0 then + local handle = get_filter_handle('ffff:', 'src', device, mac) + if handle then + exec('tc filter del dev "%s" parent ffff: protocol all prio 2 handle %s u32 police rate %skbit mtu 6k burst 6k drop' % {device, handle, limit_up}) + else + print('Warning! Could not get a handle for %s parent :ffff on interface %s' % { mac, device }) + end + end + -- remove clients class + if device and id then + exec('tc class del dev "%s" classid 1:%s' % {device, id}) + exec('tc filter del dev "%s" parent 1:0 prio 1' % device) -- ipv6 rule + --exec('tc qdisc del dev "%s" parent 1:%s sfq perturb 10' % { device, id }) + end +end + + +-- Add whitelist rules +function add_whitelist_rule(mac) + exec("iptables -t filter -I luci_splash_filter -m mac --mac-source %q -j RETURN" % mac) + exec("iptables -t nat -I luci_splash_leases -m mac --mac-source %q -j RETURN" % mac) + if has_ipv6 then + exec("ip6tables -t filter -I luci_splash_filter -m mac --mac-source %q -j RETURN" % mac) + end + uci:foreach("luci_splash", "iface", function(s) + local device = get_physdev(s['.name']) + if device and device ~= "" then + exec('tc filter add dev "%s" parent ffff: protocol ip prio 1 u32 match ether src %s police pass' % { device, mac }) + exec('tc filter add dev "%s" parent 1:0 protocol ip prio 1 u32 match ether dst %s classid 1:1' % { device, mac }) + end + end) +end + + +-- Add blacklist rules +function add_blacklist_rule(mac) + exec("iptables -t filter -I luci_splash_filter -m mac --mac-source %q -j DROP" % mac) + if has_ipv6 then + exec("ip6tables -t filter -I luci_splash_filter -m mac --mac-source %q -j DROP" % mac) + end +end + + +-- Synchronise leases, remove abandoned rules +function sync() + lock() + + local time = os.time() + + -- Current leases in state files + local leases = uci:get_all("luci_splash_leases") + + -- Convert leasetime to seconds + local leasetime = tonumber(uci:get("luci_splash", "general", "leasetime")) * 3600 + + -- Clean state file + uci:load("luci_splash_leases") + uci:revert("luci_splash_leases") + + + local arpcache = get_arpcache() + + local blackwhitelist = uci:get_all("luci_splash") + local whitelist_total = 0 + local whitelist_online = 0 + local blacklist_total = 0 + local blacklist_online = 0 + local leasecount = 0 + local leases_online = 0 + + -- For all leases + for k, v in pairs(leases) do + if v[".type"] == "lease" then + if os.difftime(time, tonumber(v.start)) > leasetime then + -- Remove expired + remove_lease_rule(v.mac, v.ipaddr, v.device, tonumber(v.limit_up), tonumber(v.limit_down)) + else + leasecount = leasecount + 1 + + -- only count leases_online for connected clients + if arpcache[v.mac] then + leases_online = leases_online + 1 + end + + -- Rewrite state + uci:section("luci_splash_leases", "lease", convert_mac_to_secname(v.mac), { + mac = v.mac, + ipaddr = v.ipaddr, + device = v.device, + limit_up = limit_up, + limit_down = limit_down, + start = v.start + }) + end + end + end + + -- Whitelist, Blacklist + for _, s in utl.spairs(blackwhitelist, + function(a,b) return blackwhitelist[a][".type"] > blackwhitelist[b][".type"] end + ) do + if (s[".type"] == "whitelist") then + whitelist_total = whitelist_total + 1 + if s.mac then + local mac = s.mac:lower() + if arpcache[mac] then + whitelist_online = whitelist_online + 1 + end + end + end + if (s[".type"] == "blacklist") then + blacklist_total = blacklist_total + 1 + if s.mac then + local mac = s.mac:lower() + if arpcache[mac] then + blacklist_online = blacklist_online + 1 + end + end + end + end + + -- ToDo: + -- include a new field "leases_online" in stats to differ between active clients and leases: + -- update_stats(leasecount, leases_online, whitelist_online, whitelist_total, blacklist_online, blacklist_total) later: + update_stats(leases_online, whitelist_online, whitelist_total, blacklist_online, blacklist_total) + + uci:save("luci_splash_leases") + + -- Get the mac addresses of current leases + local macs = get_known_macs() + + ipt:resync() + + ipt_delete_all({table="filter", chain="luci_splash_filter", options={"MAC"}}, + function(r) return not macs[r.options[2]:lower()] end) + ipt_delete_all({table="nat", chain="luci_splash_leases", options={"MAC"}}, + function(r) return not macs[r.options[2]:lower()] end) + ipt_delete_all({table="mangle", chain="luci_splash_mark_out", options={"MAC", "MARK", "set"}}, + function(r) return not macs[r.options[2]:lower()] end) + ipt_delete_all({table="mangle", chain="luci_splash_mark_in", options={"/*", "MARK", "set"}}, + function(r) return not macs[r.options[2]:lower()] end) + + + if has_ipv6 then + ipt6_delete_all({table="filter", chain="luci_splash_filter", options={"MAC"}}, + function(r) return not macs[r.options[2]:lower()] end) + ipt6_delete_all({table="mangle", chain="luci_splash_mark_out", options={"MAC", "MARK", "set"}}, + function(r) return not macs[r.options[2]:lower()] end) + end + + unlock() +end + +-- Show client info +function list() + local arpcache = get_arpcache() + -- Find traffic usage + local function traffic(lease) + local traffic_in = 0 + local traffic_out = 0 + + local rin = ipt:find({table="mangle", chain="luci_splash_mark_in", destination=lease.ipaddr}) + local rout = ipt:find({table="mangle", chain="luci_splash_mark_out", options={"MAC", lease.mac:upper()}}) + + if rin and #rin > 0 then traffic_in = math.floor( rin[1].bytes / 1024) end + if rout and #rout > 0 then traffic_out = math.floor(rout[1].bytes / 1024) end + + return traffic_in, traffic_out + end + + -- Print listings + local leases = uci:get_all("luci_splash_leases") + local blackwhitelist = uci:get_all("luci_splash") + + print(string.format( + "%-17s %-15s %-9s %-4s %-7s %20s", + "MAC", "IP", "State", "Dur.", "Intf.", "Traffic down/up" + )) + + -- Leases + for _, s in pairs(leases) do + if s[".type"] == "lease" and s.mac then + local ti, to = traffic(s) + local mac = s.mac:lower() + local arp = arpcache[mac] + print(string.format( + "%-17s %-15s %-9s %3dm %-7s %7dKB %7dKB", + mac, s.ipaddr, "leased", + math.floor(( os.time() - tonumber(s.start) ) / 60), + arp and arp[1] or "?", ti, to + )) + end + end + + -- Whitelist, Blacklist + for _, s in utl.spairs(blackwhitelist, + function(a,b) return blackwhitelist[a][".type"] > blackwhitelist[b][".type"] end + ) do + if (s[".type"] == "whitelist" or s[".type"] == "blacklist") and s.mac then + local mac = s.mac:lower() + local arp = arpcache[mac] + print(string.format( + "%-17s %-15s %-9s %4s %-7s %9s %9s", + mac, arp and arp[2] or "?", s[".type"], + "- ", arp and arp[1] or "?", "-", "-" + )) + end + end +end + +main(arg) |