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gluon-client-bridge: use a veth pair instead of macvlan to connect local-node to br-client

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macvlan interfaces never directly exchange traffic with the underlying
interface, but only with other hosts behind the interface. In consequence,
router advertisements from the uradvd running on br-client could never
reach local-node, preventing it from getting an IPv6 address without RAs
from an external radvd. Fix this be replacing the macvlan interface with
a veth pair (with the peer interface in br-client).

As a side effect, this saves about 5KB of flash, as the veth module is
simpler than macvlan.
This commit is contained in:
Matthias Schiffer 2017-02-10 09:44:23 +01:00
parent 249ff34079
commit f238b01173
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GPG Key ID: 16EF3F64CB201D9C
4 changed files with 14 additions and 5 deletions
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2
package/gluon-client-bridge/Makefile
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@ -12,7 +12,7 @@ define Package/gluon-client-bridge
SECTION:=gluon
CATEGORY:=Gluon
TITLE:=Provides a bridge and a wireless interface for clients to connect to
DEPENDS:=+gluon-core +kmod-macvlan
DEPENDS:=+gluon-core +kmod-veth
endef
define Build/Prepare

3
package/gluon-client-bridge/luasrc/lib/gluon/upgrade/300-gluon-client-bridge-network
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@ -23,6 +23,9 @@ if sysconfig.lan_ifname and not ifname and not uci:get_bool('network', 'mesh_lan
end
end
util.add_to_set(interfaces, 'local-port')
uci:delete('network', 'client')
uci:section('network', 'interface', 'client', {
type = 'bridge',

5
package/gluon-client-bridge/luasrc/lib/gluon/upgrade/310-gluon-client-bridge-local-node
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@ -8,10 +8,11 @@ local uci = require('simple-uci').cursor()
uci:delete('network', 'local_node_dev')
uci:section('network', 'device', 'local_node_dev', {
type = 'veth',
name = 'local-node',
ifname = 'br-client',
type = 'macvlan',
macaddr = site.next_node.mac,
peer_name = 'local-port',
peer_macaddr = sysconfig.primary_mac,
})

9
package/gluon-ebtables/files/lib/gluon/ebtables/101-dir-rules
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@ -1,2 +1,7 @@
rule 'IN_ONLY --logical-in br-client -i ! bat0 -j DROP'
rule 'OUT_ONLY --logical-out br-client -o ! bat0 -j DROP'
rule 'IN_ONLY --logical-in br-client -i bat0 -j RETURN'
rule 'IN_ONLY --logical-in br-client -i local-port -j RETURN'
rule 'IN_ONLY --logical-in br-client -j DROP'
rule 'OUT_ONLY --logical-out br-client -o bat0 -j RETURN'
rule 'OUT_ONLY --logical-out br-client -o local-port -j RETURN'
rule 'OUT_ONLY --logical-out br-client -j DROP'