luci-proto-3g: make it a self-contained package

The follow error will appear after clicking "Switch protcol" to 3g when
luci-proto-3g was not installed.  Fix this by moving the relevant parts
from luci-proto-ppp into luci-proto-3g and making it complete as a
single protocol handler

> Missing protocol extension for proto "3g"
> cannot open /usr/lib/lua/luci/model/cbi/admin_network/proto_3g.lua: No such file or directory

Closes openwrt/luci#1815

Signed-off-by: Florian Eckert <fe@dev.tdt.de>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/protocols/luci-proto-3g/luasrc/model/network/proto_3g.lua b/protocols/luci-proto-3g/luasrc/model/network/proto_3g.lua
new file mode 100644
index 000000000..b2454838f
--- /dev/null
+++ b/protocols/luci-proto-3g/luasrc/model/network/proto_3g.lua
@@ -0,0 +1,49 @@
+-- Copyright 2018 Florian Eckert <fe@dev.tdt.de>
+-- Licensed to the public under the Apache License 2.0.
+
+local netmod = luci.model.network
+local interface = luci.model.network.interface
+
+local proto = netmod:register_protocol("3g")
+
+function proto.get_i18n(self)
+	return luci.i18n.translate("UMTS/GPRS/EV-DO")
+end
+
+function proto.ifname(self)
+	return "3g-" .. self.sid
+end
+
+function proto.get_interface(self)
+	return interface(self:ifname(), self)
+end
+
+function proto.is_installed(self)
+	return nixio.fs.access("/lib/netifd/proto/3g.sh")
+end
+
+function proto.opkg_package(self)
+	return "comgt"
+end
+
+function proto.is_floating(self)
+	return true
+end
+
+function proto.is_virtual(self)
+	return true
+end
+
+function proto.get_interfaces(self)
+	return nil
+end
+
+function proto.contains_interface(self, ifname)
+	if self:is_floating() then
+		return (netmod:ifnameof(ifc) == self:ifname())
+	else
+		return netmod.protocol.contains_interface(self, ifc)
+	end
+end
+
+netmod:register_pattern_virtual("^3g%-%w")