Huawei E303 3G dongle in OpenWRT BarrierBreaker

Mar 15, 2015 11:54 · 813 words · 4 minute read

This is a not detailed howto about to make Huawei E303 dongle work with OpenWRT BarrierBreaker. The first step is to follow the official guide to install all the packages needed, etc. Then, create the following files to add support for the 3G dongle:

/etc/config/usb-mode-3g-e303.json

{
"messages" : [
"55534243000000000000000000000611060000000000000000000000000000",
],
"devices" : {
"12d1:14fe": {
"*": {
"t_vendor": 4817,
"t_product": [ 5374 ],
"msg": [ 0 ]
}
},
}
}

/etc/hotplug.d/usb/22-dongie_hspaplus

DONGIEHSPAPLUS_PRODID="12d114f0"                                          if [ "${PRODUCT}" "${DONGIEHSPAPLUS_PRODID}" ]
then
if [ "${ACTION}" = "add" ]; then                           
echo '12d1 14fe ff' > /sys/bus/usb-serial/drivers/optionnew_id
/sbin/usbmode -s -v -c /etc/config/usb-mode-3g-e303.json
fi
fi

Fix the /etc/hotplug.d/usb/20-usb_mode by adding a sleep 5 in the first line to get the usb working at boot. Otherwise, you need to re-plug your 3G dongle in order to make it work:
```
sleep 5
/etc/init.d/usbmode start
```

Modify the /etc/chatscripts/3g.chat with the number you need to call. In this particular case, for Movistar Spain, *99#:

ABORT   BUSY
ABORT   'NO CARRIER'
ABORT   ERROR
REPORT  CONNECT
TIMEOUT 10
""      "AT&F"
OK      "ATE1"
OK      'AT+CGDCONT=1,"IP","$USE_APN"'
SAY     "Calling UMTS/GPRS"
TIMEOUT 30
OK      "ATD*99#"
CONNECT ' '

Then, try it. You should see the correct lines in the dmesg or logread output, and the correct ones in /sys/kernel/debug/usb/devices (check the official guide)

Now configure your network connection, those are the files I’ve modified, but your mileage may vary:

/etc/config/network.3g

config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'

config globals 'globals'
option ula_prefix 'ZZZZZZZ::/48'

config interface wan
option ifname 'ppp0'
option proto '3g'
option service 'umts'
option device '/dev/ttyUSB0'
option apn 'movistar.es'
option pincode 'YOURPIN'
option username 'movistar'
option password 'movistar'

config switch
option name 'rt305x'
option reset '1'
option enable_vlan '1'

config switch_vlan
option device 'rt305x'
option vlan '1'
option ports '0 1 2 3  6t'

config switch_vlan
option device 'rt305x'
option vlan '2'
option ports '4  6t'

config 'interface' 'wifi'
option 'proto'      'static'
option 'ipaddr'     '192.168.23.1'
option 'netmask'    '255.255.255.0'

/etc/config/wireless.3g

config wifi-device  radio0
option type     mac80211
option channel  11
option hwmode	11g
option path	'10180000.wmac'
option htmode	HT20

config wifi-iface
option device   radio0
option network  wifi
option mode     ap
option ssid     yourapname
option encryption none

Obviously, you need to set some encryption. I’ll let you figure this out :)

/etc/config/dhcp.3g

config dnsmasq
option domainneeded '1'
option boguspriv '1'
option filterwin2k '0'
option localise_queries '1'
option rebind_protection '1'
option rebind_localhost '1'
option local '/lan/'
option domain 'lan'
option expandhosts '1'
option nonegcache '0'
option authoritative '1'
option readethers '1'
option leasefile '/tmp/dhcp.leases'
option resolvfile '/tmp/resolv.conf.auto'
list server '208.67.220.220'
list server '208.67.222.222'

config dhcp 'lan'
option interface 'lan'
option start '100'
option limit '150'
option leasetime '12h'
option dhcpv6 'server'
option ra 'server'

config dhcp 'wan'
option interface 'wan'
option ignore '1'

config odhcpd 'odhcpd'
option maindhcp '0'
option leasefile '/tmp/hosts/odhcpd'
option leasetrigger '/usr/sbin/odhcpd-update'

config 'dhcp' 'wifi'
option 'interface'  'wifi'
option 'start'      '100'
option 'limit'      '150'
option 'leasetime'  '12h'

/etc/config/firewall.3g

config defaults
option syn_flood  1
option input		ACCEPT
option output		ACCEPT
option forward		REJECT
option disable_ipv6  1

config zone
option name		wan
list   network		'wan'
list   network		'wan6'
option input		REJECT
option output		ACCEPT
option forward		REJECT
option masq		1
option mtu_fix		1

config forwarding
option src		lan
option dest		wan

config rule
option name		Allow-DHCP-Renew
option src		wan
option proto		udp
option dest_port	68
option target		ACCEPT
option family		ipv4

config rule
option name		Allow-Ping
option src		wan
option proto		icmp
option icmp_type	echo-request
option family		ipv4
option target		ACCEPT

config rule
option name		Allow-DHCPv6
option src		wan
option proto		udp
option src_ip		fe80::/10
option src_port		547
option dest_ip		fe80::/10
option dest_port	546
option family		ipv6
option target		ACCEPT

config rule
option name		Allow-ICMPv6-Input
option src		wan
option proto	icmp
list icmp_type		echo-request
list icmp_type		echo-reply
list icmp_type		destination-unreachable
list icmp_type		packet-too-big
list icmp_type		time-exceeded
list icmp_type		bad-header
list icmp_type		unknown-header-type
list icmp_type		router-solicitation
list icmp_type		neighbour-solicitation
list icmp_type		router-advertisement
list icmp_type		neighbour-advertisement
option limit		1000/sec
option family		ipv6
option target		ACCEPT

config rule
option name		Allow-ICMPv6-Forward
option src		wan
option dest		*
option proto		icmp
list icmp_type		echo-request
list icmp_type		echo-reply
list icmp_type		destination-unreachable
list icmp_type		packet-too-big
list icmp_type		time-exceeded
list icmp_type		bad-header
list icmp_type		unknown-header-type
option limit		1000/sec
option family		ipv6
option target		ACCEPT

config include
option path /etc/firewall.user

config zone
option name       wifi
list   network    'wifi'
option input      ACCEPT
option output     ACCEPT
option forward    REJECT

config 'forwarding'
option 'src'        'wifi'
option 'dest'       'wan'

config 'forwarding'
option 'src'        'lan'
option 'dest'       'wifi'

config 'forwarding'
option 'src'        'wifi'
option 'dest'       'lan'

config zone
option name 'lan'
option network 'lan'
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'REJECT'
option masq '1'

I have the following script to set all the files correctly, in /sbin/sw_3g_mode:

#!/bin/sh
/bin/cp -f /etc/config/dhcp.3g /etc/config/dhcp
/bin/cp -f /etc/config/firewall.3g /etc/config/firewall
/bin/cp -f /etc/config/network.3g /etc/config/network
/bin/cp -f /etc/config/wireless.3g /etc/config/wireless
/bin/sync
/sbin/ifup wifi
/sbin/wifi
/etc/init.d/firewall restart
/etc/init.d/dnsmasq restart

Enjoy it! :)

Reference links: