modules/admin-full: throw more work-arounds, exceptions, hacks and detections at...

[project/luci.git] / modules / admin-full / luasrc / model / cbi / admin_network / vlan.lua

--[[
LuCI - Lua Configuration Interface

Copyright 2008 Steven Barth <steven@midlink.org>
Copyright 2010-2011 Jo-Philipp Wich <xm@subsignal.org>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

$Id$
]]--

m = Map("network", translate("Switch"), translate("The network ports on your router can be combined to several <abbr title=\"Virtual Local Area Network\">VLAN</abbr>s in which computers can communicate directly with each other. <abbr title=\"Virtual Local Area Network\">VLAN</abbr>s are often used to separate different network segments. Often there is by default one Uplink port for a connection to the next greater network like the internet and other ports for a local network."))

m.uci:foreach("network", "switch",
        function(x)
                local switch_name = x.name or x['.name']
                local has_enable  = "enable"
                local has_reset   = nil
                local has_vlan    = nil
                local has_learn   = nil 
                local has_vlan4k  = nil
                local has_ptpvid  = nil
                local min_vid     = 0
                local max_vid     = 16
                local num_vlans   = 16
                local num_ports   = 6
                local cpu_port    = 5

                local enable_vlan4k = false

                -- Parse some common switch properties from swconfig help output.
                local swc = io.popen("swconfig dev %q help 2>/dev/null" % switch_name)
                if swc then

                        local is_port_attr = false
                        local is_vlan_attr = false

                        while true do
                                local line = swc:read("*l")
                                if not line then break end

                                if line:match("^%s+%-%-vlan") then
                                        is_vlan_attr = true

                                elseif line:match("^%s+%-%-port") then
                                        is_vlan_attr = false
                                        is_port_attr = true

                                elseif line:match("^Switch %d+:") then
                                        num_ports, cpu_port, num_vlans =
                                                line:match("ports: (%d+) %(cpu @ (%d+)%), vlans: (%d+)")

                                        num_ports  = tonumber(num_ports or  6)
                                        num_vlans  = tonumber(num_vlans or 16)
                                        cpu_port   = tonumber(cpu_port  or  5)
                                        min_vid    = 1
                                        has_enable = nil

                                elseif line:match(": pvid") or line:match(": tag") or line:match(": vid") then
                                        if is_vlan_attr then has_vlan4k = line:match(": (%w+)") end
                                        if is_port_attr then has_ptpvid = line:match(": (%w+)") end

                                elseif line:match(": enable_vlan") then
                                        has_vlan = "enable_vlan"

                                elseif line:match(": enable_learning") then
                                        has_learn = "enable_learning"

                                elseif line:match(": reset") then
                                        has_reset = "reset"

                                elseif line:match(": enable_vlan4k") then
                                        enable_vlan4k = true

                                end
                        end

                        swc:close()
                end


                -- The PVID options (if any) are added to this table so that
                -- section create below can add the just created vlan to the
                -- choice list of the PVID options...
                local pvid_opts = { }

                -- This function re-reads all existing vlan ids and populates
                -- PVID options choice lists
                local function populate_pvids()
                        local vlan_ids = { }
                        m.uci:foreach("network", "switch_vlan",
                                function(s)
                                        local vid = s[has_vlan4k or "vlan"] or s["vlan"]
                                        if vid ~= nil then
                                                vlan_ids[#vlan_ids+1] = vid
                                        end
                                end)

                        local opt, vid
                        for _, opt in ipairs(pvid_opts) do
                                opt:reset_values()
                                opt:value("", translate("none"))
                                for _, vid in luci.util.vspairs(vlan_ids) do
                                        opt:value(vid, translatef("VLAN %d", tonumber(vid)))
                                end
                        end
                end

                -- Switch properties
                s = m:section(NamedSection, x['.name'], "switch", translatef("Switch %q", switch_name))
                s.addremove = false

                if has_enable then
                        x = s:option(Flag, has_enable, translate("Enable this switch"))
                        x.default = x.enabled
                end

                if has_vlan then
                        x = s:option(Flag, has_vlan, translate("Enable VLAN functionality"))
                        x.default = x.enabled
                end

                if enable_vlan4k then
                        s:option(Flag, "enable_vlan4k", translate("Enable 4K VLANs"))
                end

                if has_learn then
                        x = s:option(Flag, has_learn, translate("Enable learning and aging"))
                        x.default = x.enabled
                end

                if has_reset then
                        x = s:option(Flag, has_reset, translate("Reset switch during setup"))
                        x.default = x.enabled
                end


                -- VLAN table
                s = m:section(TypedSection, "switch_vlan", translatef("VLANs on %q", switch_name))
                s.template = "cbi/tblsection"
                s.addremove = true
                s.anonymous = true

                -- Override cfgsections callback to enforce row ordering by vlan id.
                s.cfgsections = function(self)
                        local osections = TypedSection.cfgsections(self)
                        local sections = { }
                        local section

                        for _, section in luci.util.spairs(
                                osections,
                                function(a, b)
                                        return (tonumber(m.uci:get("network", osections[a], has_vlan4k or "vlan")) or 9999)
                                                <  (tonumber(m.uci:get("network", osections[b], has_vlan4k or "vlan")) or 9999)
                                end
                        ) do
                                sections[#sections+1] = section
                        end

                        return sections
                end

                -- When creating a new vlan, preset it with the highest found vid + 1.
                -- Repopulate the PVID choice lists afterwards.
                s.create = function(self, section)
                        local sid = TypedSection.create(self, section)

                        local max_nr = 0
                        local max_id = 0

                        m.uci:foreach("network", "switch_vlan",
                                function(s)
                                        local nr = tonumber(s.vlan)
                                        local id = has_vlan4k and tonumber(s[has_vlan4k])
                                        if nr ~= nil and nr > max_nr then max_nr = nr end
                                        if id ~= nil and id > max_id then max_id = id end
                                end)

                        m.uci:set("network", sid, "vlan", max_nr + 1)

                        if has_vlan4k then
                                m.uci:set("network", sid, has_vlan4k, max_id + 1)
                        end

                        -- add newly created vlan to the pvid choice list
                        populate_pvids()

                        return sid
                end

                -- Repopulate PVId choice lists if a vlan gets removed.
                s.remove = function(self, section)
                        local rv = TypedSection.remove(self, section)

                        -- repopulate pvid choices
                        populate_pvids()

                        return rv
                end


                local port_opts = { }
                local untagged  = { }

                -- Parse current tagging state from the "ports" option.
                local portvalue = function(self, section)
                        local pt
                        for pt in (m.uci:get("network", section, "ports") or ""):gmatch("%w+") do
                                local pc, tu = pt:match("^(%d+)([tu]*)")
                                if pc == self.option then return (#tu > 0) and tu or "u" end
                        end
                        return ""
                end

                -- Validate port tagging. Ensure that a port is only untagged once,
                -- bail out if not.
                local portvalidate = function(self, value, section)
                        -- ensure that the ports appears untagged only once
                        if value == "u" then
                                if not untagged[self.option] then
                                        untagged[self.option] = true
                                elseif min_vid > 0 or tonumber(self.option) ~= cpu_port then -- enable multiple untagged cpu ports due to weird broadcom default setup
                                        return nil,
                                                translatef("Port %d is untagged in multiple VLANs!", tonumber(self.option) + 1)
                                end
                        end
                        return value
                end


                local vid = s:option(Value, has_vlan4k or "vlan", "VLAN ID")

                vid.rmempty = false
                vid.forcewrite = true

                -- Validate user provided VLAN ID, make sure its within the bounds
                -- allowed by the switch.
                vid.validate = function(self, value, section)
                        local v = tonumber(value)
                        local m = has_vlan4k and 4094 or (num_vlans - 1)
                        if v ~= nil and v >= min_vid and v <= m then
                                return value
                        else
                                return nil,
                                        translatef("Invalid VLAN ID given! Only IDs between %d and %d are allowed.", min_vid, m)
                        end
                end

                -- When writing the "vid" or "vlan" option, serialize the port states
                -- as well and write them as "ports" option to uci.
                vid.write = function(self, section, value)
                        local o
                        local p = { }

                        for _, o in ipairs(port_opts) do
                                local v = o:formvalue(section)
                                if v == "t" then
                                        p[#p+1] = o.option .. v
                                elseif v == "u" then
                                        p[#p+1] = o.option
                                end
                        end

                        m.uci:set("network", section, "ports", table.concat(p, " "))
                        return Value.write(self, section, value)
                end

                -- Fallback to "vlan" option if "vid" option is supported but unset.
                vid.cfgvalue = function(self, section)
                        return m.uci:get("network", section, has_vlan4k or "vlan")
                                or m.uci:get("network", section, "vlan")
                end

                -- Build per-port off/untagged/tagged choice lists.
                local pt
                for pt = 0, num_ports - 1 do
                        local po = s:option(ListValue, tostring(pt),
                                (pt == cpu_port) and translate("CPU") or translatef("Port %d", (pt + 1)))

                        po:value("", translate("off"))
                        po:value("u" % pt, translate("untagged"))
                        po:value("t" % pt, translate("tagged"))

                        po.cfgvalue = portvalue
                        po.validate = portvalidate
                        po.write    = function() end

                        port_opts[#port_opts+1] = po
                end


                -- Does this switch support PVIDs?
                if has_ptpvid then

                        -- Spawn a "virtual" section. We just attach it to the global
                        -- switch section here, the overrides below take care of writing
                        -- the actual values to the correct uci sections.
                        s = m:section(TypedSection, "switch",
                                translatef("Port PVIDs on %q", switch_name),
                                translate("Port <abbr title=\"Primary VLAN IDs\">PVIDs</abbr> specify " ..
                                        "the default VLAN ID added to received untagged frames."))

                        s.template  = "cbi/tblsection"
                        s.addremove = false
                        s.anonymous = true

                        -- Build port list, store pointers to the option objects in the
                        -- pvid_opts array so that other callbacks can repopulate their
                        -- choice lists.
                        local pt
                        for pt = 0, num_ports - 1 do
                                local po = s:option(ListValue, tostring(pt),
                                        (pt == cpu_port) and translate("CPU") or translatef("Port %d", (pt + 1)))

                                -- When cbi queries the current config value for this post,
                                -- lookup the associated switch_port section (if any) and
                                -- return its "pvid" or "vlan" option value.
                                po.cfgvalue = function(self, section)
                                        local val
                                        m.uci:foreach("network", "switch_port",
                                                function(s)
                                                        if s.port == self.option then
                                                                val = s[has_ptpvid]
                                                                return false
                                                        end
                                                end)
                                        return val
                                end

                                -- On write, find the actual switch_port section associated
                                -- to this port and set the value there. Create a new
                                -- switch_port section for this port if there is none yet.
                                po.write = function(self, section, value)
                                        local found = false

                                        m.uci:foreach("network", "switch_port",
                                                function(s)
                                                        if s.port == self.option then
                                                                m.uci:set("network", s['.name'], has_ptpvid, value)
                                                                found = true
                                                                return false
                                                        end
                                                end)

                                        if not found then
                                                m.uci:section("network", "switch_port", nil, {
                                                        ["port"]     = self.option,
                                                        [has_ptpvid] = value
                                                })
                                        end
                                end

                                -- If the user cleared the PVID value on this port, find
                                -- the associated switch_port section and clear it.
                                -- If the section does not contain any other unrelated
                                -- options (like led or blinkrate) then remove it completely,
                                -- else just clear out the "pvid" option.
                                po.remove = function(self, section)
                                        m.uci:foreach("network", "switch_port",
                                                function(s)
                                                        if s.port == self.option then
                                                                local k, found
                                                                local empty = true

                                                                for k, _ in pairs(s) do
                                                                        if k:sub(1,1) ~= "." and k ~= "port" and k ~= has_ptpvid then
                                                                                empty = false
                                                                                break
                                                                        end
                                                                end

                                                                if empty then
                                                                        m.uci:delete("network", s['.name'])
                                                                else
                                                                        m.uci:delete("network", s['.name'], has_ptpvid)
                                                                end

                                                                return false
                                                        end
                                                end)
                                end

                                -- The referenced VLAN might just have been removed, simply
                                -- return "" (none) in this case to avoid triggering a
                                -- validation error.
                                po.validate = function(...)
                                        return ListValue.validate(...) or ""
                                end

                                pvid_opts[#pvid_opts+1] = po
                        end

                        populate_pvids()
                end
        end
)

return m