Hi,
I have one more issue in openwrt GUI. By default, openwrt opens in static IP i.e., eg: 192.168.1.1.
Suppose we have changed this static IP to DHCP IP and forgot to put the LAN then the board will not get IP from DHCP then it should get the default static IP.
I am using udhcp for DHCP IP. So it should support fallback.
Can anyone help me how can I set static IP after fail to get DHCP IP in 15 sec using UDHCP.
Thank in advance.
Regards
Sakshi
You can use hotplug to override persistent configuration with runtime one and reload network service:
https://openwrt.org/docs/guide-user/base-system/hotplug
Hi @vgaetera
Thanks for your reply.
I want to know that how we will run this hotplug.d when not able to get DHCP IP.
Is there any file in which I have to call this hotplug.d file.
I have read somewhere on google about dhclient.conf which is used when we are using dhcpc but in my case, I am using udhcp for DHCP IP.
Thank in advance
Regards
Sakshi
Hi,
I am having this problem as i have DHCP IP using "udhcp" command.
I have googled this thing and getting some answer that i have to add some line in dhclient.conf.
But i am not having dhclient.conf file in my board.
So anyone can help me in this as i dont know anything about this.
Thanks in advance
Regards
Sakshi
cat << "EOF" > /etc/hotplug.d/iface/95-dhcp-fallback
NET_ACTION="ifup"
NET_IFLO="lo"
NET_IF="lan"
NET_DELAY="15"
UCI_IP="192.168.1.123"
UCI_MASK="255.255.255.0"
UCI_GW="192.168.1.1"
UCI_DNS="192.168.1.1"
. /lib/functions/network.sh
network_flush_cache
if [ "${ACTION}" = "${NET_ACTION}" -a "${INTERFACE}" = "${NET_IFLO}" ]
then
sleep "${NET_DELAY}"
network_get_ipaddr NET_IP "${NET_IF}"
if [ -z "${NET_IP}" ]
then
uci set network.${NET_IF}.ipaddr="${UCI_IP}"
uci set network.${NET_IF}.netmask="${UCI_MASK}"
uci set network.${NET_IF}.gateway="${UCI_GW}"
uci set network.${NET_IF}.dns="${UCI_DNS}"
/etc/init.d/network reload
fi
fi
EOF
Hi @vgaetera
I don't have 95-dhcp-fallback on the path "cat /etc/hotplug.d/iface/"
in that path i have:
root@HFCI:/# cat /etc/hotplug.d/iface/
00-netstate 25-dnsmasq 65-pppoe 80-ipsec
15-teql 50-miniupnpd 70-quagga 90-rngd
20-firewall 55-mcproxy 75-rstp 95-ddns
Thanks in advance
Regards
Sakshi
The code above creates that file.
Hi @vgaetera
So I have to write that code :
in "lib/functions/network.sh" file
How this file will run?
Thanks in advance
Regards
Sakshi
No, command cat writes the code until EOF inside /etc/hotplug.d/iface/95-dhcp-fallback.
You just need to copy-paste the whole code-block inside the terminal via SSH.
Means copy the following text into the file 95-dhcp-fallback until EOF is reached
Thanks for your reply.
I have run that cmmand
and written everything in the file
but how we will run this file? i think it is souce another file which is network.sh
Thanks in advance
Regards
Sakshi
The script runs automatically when network-service brings up lo-interface.
It waits 15 seconds and checks lan-interface IPv4-address.
If there's no IPv4-address, it configures static address.
Hi @vgaetera
I have bridge interface on which I get the static and DHCP IP.
So same for fallback IP, i want the ip on bridge interface. Adding ifconfig:
root@root:/# ifconfig
br-lan Link encap:Ethernet HWaddr 00:03:7F:EE:66:D7
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::203:7fff:feee:66d7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1207 errors:0 dropped:0 overruns:0 frame:0
TX packets:1188 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:143670 (140.3 KiB) TX bytes:511720 (499.7 KiB)
eth0 Link encap:Ethernet HWaddr 00:03:7F:EE:66:D7
UP BROADCAST ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:252
eth1 Link encap:Ethernet HWaddr 00:03:7F:C0:A5:25
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:76911 errors:0 dropped:31 overruns:0 frame:0
TX packets:84288 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10637562 (10.1 MiB) TX bytes:33448890 (31.8 MiB)
Interrupt:255
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:76025 errors:0 dropped:0 overruns:0 frame:0
TX packets:76025 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5076660 (4.8 MiB) TX bytes:5076660 (4.8 MiB)
Thanks in advance
Regards
Sakshi
OpenWrt operates interfaces/networks by their logical names.
Logical-level interface lan represents network-level interface br-lan.
Hi @vgaetera
I have tried your solution by running the above command.
When I change my board from static to DHCP and I didn't put the LAN wire in the board, so the board will not get the DHCP IP. After that, I have waited for more than 20 sec and my board didn't get the static IP define in the 95-dhcp-fallback file.
So i really didn't know how this will work.
Please confirm this how it will work.
Thanks in Advance
Regards
Sakshi
The script is triggered on boot/reboot or network service restart.
May be you should try to use aliases?
It's possible to hold both static and dynamic IP on the same interface simultaneously:
https://openwrt.org/docs/guide-user/network/network_interface_alias
Hi @vgaetera
I have rebooted my board to get that script trigger but didn't work for me.
I have changed my GUI from static to DHCP and wait for 15 sec and more but didn't get the fallback IP i.e., static IP which is written in 95-dhcp-fallback. PFA file.
source /lib/functions/network.sh
INTERFACE="br-lan"
NET_ACTION="ifup"
NET_IFLO="lo"
NET_IF="lan"
NET_DELAY="15"
UCI_IP="192.168.1.1"
UCI_MASK="255.255.255.0"
UCI_PROTO="static"
if [ "$ACTION" = "$NET_ACTION" -a "$INTERFACE" = "$NET_IFLO" ]
then
sleep "$NET_DELAY"
network_get_ipaddr NET_IP "$NET_IF"
if [ -z "$NET_IP" ]
then
uci set "network.$NET_IF.ipaddr=$UCI_PROTO"
uci set "network.$NET_IF.ipaddr=$UCI_IP"
uci set "network.$NET_IF.netmask=$UCI_MASK"
/etc/init.d/network restart
fi
fi
I don't know from where it will get the INTERFACE so i have INTERFACE in this file and changed according to my requirements.
Thanks in advance
Regards
Sakshi
I think it requires some debugging:
sed -r -i 's%^(UCI_PROTO=.*)%\1\n\nset -x -v\nexec \&>>/tmp/dhcp-fallback.log\ndate\n\n%' /etc/hotplug.d/iface/95-dhcp-fallback
Hi @vgaetera
I have run the above-defined command
tsed -r -i 's%^(UCI_PROTO=.*)%\1\n\nset -x -v\nexec \&>>/tmp/dhcp-fallback.log\ndate\n\n%' /etc/hotplug.d/iface/95-dhcp-fallback
my updated 95-dhcp-fallback is given below
source /lib/functions/network.sh
INTERFACE="br-lan"
NET_ACTION="ifup"
NET_IFLO="lo"
NET_IF="lan"
NET_DELAY="15"
UCI_IP="192.168.1.1"
UCI_MASK="255.255.255.0"
UCI_PROTO="static"
set -x -v
exec &>>/tmp/dhcp-fallback.log
date
if [ "$ACTION" = "$NET_ACTION" -a "$INTERFACE" = "$NET_IFLO" ]
then
sleep "$NET_DELAY"
network_get_ipaddr NET_IP "$NET_IF"
if [ -z "$NET_IP" ]
then
uci set "network.$NET_IF.ipaddr=$UCI_PROTO"
uci set "network.$NET_IF.ipaddr=$UCI_IP"
uci set "network.$NET_IF.netmask=$UCI_MASK"
/etc/init.d/network restart
fi
fi
and reboot the board.
After that, I have changed my router from static to DHCP and again wait for more than 15 sec.
Also, I didn't get any logs on /tmp path.
I think this file is not running in the backend.
Thanks in advance
Regards
Sakshi
sed -i 's%^exec.*%exec \&>"/root/dhcp-fallback-$(date -Iseconds).log"%' /etc/hotplug.d/iface/95-dhcp-fallback
To see the logs:
head -n -0 /root/dhcp-fallback-*