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[Solved] Dhcpcd gives me a link local address
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0x9fff00
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Joined: 21 Jan 2018
Posts: 2

PostPosted: Sun Jan 21, 2018 5:26 pm    Post subject: [Solved] Dhcpcd gives me a link local address Reply with quote

My WiFi card is Mediatek MT7630E with the driver from https://github.com/neurobin/MT7630E.
Code:
# lspci -k
...
03:00.0 Network controller: MEDIATEK Corp. MT7630e 802.11bgn Wireless Network Adapter
   Subsystem: Foxconn International, Inc. MT7630e 802.11bgn Wireless Network Adapter
   Kernel driver in use: mt7630e
   Kernel modules: mt7630e
...

Code:
# ip link
...
4: wlp3s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether <wifi card mac address> brd ff:ff:ff:ff:ff:ff
...

Code:
# iw dev
phy#0
   Interface wlp3s0f0
      ifindex 4
      wdev 0x1
      addr <wifi card mac address>
      type managed

Code:
# wpa_supplicant -Dnl80211,wext -i wlp3s0f0 -c <(wpa_passphrase <ssid> <password>)
Successfully initialized wpa_supplicant
wlp3s0f0: SME: Trying to authenticate with <router mac address> (SSID=<ssid> freq=<frequency>)
wlp3s0f0: Trying to associate with <router mac address> (SSID=<ssid> freq=<frequency>)
wlp3s0f0: Associated with <router mac address>
wlp3s0f0: CTRL-EVENT-SUBNET-STATUS-UPDATE status=0
wlp3s0f0: CTRL-EVENT-REGDOM-CHANGE init=COUNTRY_IE type=COUNTRY alpha2=SE
wlp3s0f0: WPA: Key negotiation completed with <router mac address> [PTK=CCMP GTK=CCMP]
wlp3s0f0: CTRL-EVENT-CONNECTED - Connection to <router mac address> completed [id=0 id_str=]

Code:
# dhcpcd -d wlp3s0f0
dhcpcd-6.11.3 starting
...
wlp3s0f0: delaying IPv6 router solicitation for 0.1 seconds
wlp3s0f0: delaying IPv4 for 0.4 seconds
wlp3s0f0: soliciting an IPv6 router
wlp3s0f0: sending Router Solicitation
wlp3s0f0: soliciting a DHCP lease
wlp3s0f0: sending DISCOVER (xid 0xae0b16de), next in 3.5 seconds
wlp3s0f0: sending DISCOVER (xid 0xae0b16de), next in 8.0 seconds
wlp3s0f0: sending Router Solicitation
wlp3s0f0: using IPv4LL address 169.254.201.233
wlp3s0f0: adding route to 169.254.0.0/16
wlp3s0f0: ARP announcing 169.254.201.233 (1 of 2), next in 2.0 seconds
wlp3s0f0: executing `/lib/dhcpcd/dhcpcd-run-hooks' IPV4LL

dmesg: https://gist.github.com/0x9fff00/807e3298b3df7eaf59ea57d673497500
I only get a link local address, so I can't connect to the internet. All other devices connected to the network work, and the WiFi card works in Arch Linux and Windows.
Edit: I solved it by enabling the RT2800PCI option in the kernel configuration.


Last edited by 0x9fff00 on Mon Jan 22, 2018 6:41 pm; edited 1 time in total
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NeddySeagoon
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PostPosted: Sun Jan 21, 2018 5:58 pm    Post subject: Reply with quote

0x9fff00,

Code:
[  480.176174] wlp3s0f0: authenticate with <router mac address>
[  480.183718] wlp3s0f0: send auth to <router mac address> (try 1/3)
[  480.185128] wlp3s0f0: authenticated
[  480.185638] wlp3s0f0: associate with <router mac address> (try 1/3)
[ 480.189005] wlp3s0f0: RX AssocResp from <router mac address> (capab=0x1431 status=0 aid=3)
[ 496.155660] wlp3s0f0: deauthenticating from <router mac address> by local choice (Reason: 3=DEAUTH_LEAVING)


That shows that its working but you asked it to stop. That's what Reason: 3 means.

The usual cause of this is more that one network controller trying to use wpa_supplicant at the same time.
This is supported by the cycling shown in dmesg.

How do you start your WiFi?

There it a lot of debug junk in dmesg. Some debug options interfere with normal device operation.
They are intended for debugging the code, not individual connection issues. Turn this off.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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0x9fff00
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Joined: 21 Jan 2018
Posts: 2

PostPosted: Sun Jan 21, 2018 6:56 pm    Post subject: Reply with quote

NeddySeagoon wrote:
That shows that its working but you asked it to stop. That's what Reason: 3 means.

That's because I pressed ctrl+C to run another command. After that I ran wpa_supplicant again with the -B option.
Here is the output from ping that shows that it's not working:
Code:
# ping -c 4 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 169.254.201.233 icmp_seq=1 Destination Host Unreachable
From 169.254.201.233 icmp_seq=2 Destination Host Unreachable
From 169.254.201.233 icmp_seq=3 Destination Host Unreachable
From 169.254.201.233 icmp_seq=4 Destination Host Unreachable

--- 8.8.8.8 ping statistics ---
4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3056ms
pipe 4

NeddySeagoon wrote:
How do you start your WiFi?

Like this:
Code:
# wpa_supplicant -B -Dnl80211,wext -i wlp3s0f0 -c <(wpa_passphrase <ssid> <password>)
# dhcpcd wlp3s0f0

I've tried the ncurses versions of NetworkManager and Wicd too, but they didn't work either.
NeddySeagoon wrote:
There it a lot of debug junk in dmesg. Some debug options interfere with normal device operation.
They are intended for debugging the code, not individual connection issues. Turn this off.

What do you mean? How do I do that?
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