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#1 2017-04-28 15:37:58

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

[SOLVED] Use computer to provide wifi access?

I have two laptops:

- A: has eth0 and wifi wlan0. (computer is connected through wired eth0)
- B: has only wifi

I also have a external wireless device wlan1 (Alfa AWUSO36H).

Now I want to install Arch on computer B, but I don't have a router, so I don't have access to any wifi, and I don't have time to buy a usb-ethernet adaptor.

It was suggested that I use one laptop to provide Internet to the other.

If I read wiki on software_access_point, it says I must have "Supported interface modes:" list "AP". None of my two devices seem to do that, so does this mean I'm screwed?

When I run "iw list" it does however say:

Device supports AP scan.
Driver supports full state transitions for AP/GO clients

In the wiki article ad-hoc_networking, it doesn't say anything about supporting "AP", but that all devices must run ath9k firmware.

I'm not sure what to do next.

I did try running, on computer A:

sudo iw wlan1 set type ibss
sudo ip link set wlan1 up
sudo iw wlan1 ibss join MY_SSID 2422
sudo ip address add 192.168.83.13 dev wlan1

But I can't see the "MY_SSID" network from computer B.

...and here's the full output of iw list on computer A with external card connected:

Wiphy phy3
	max # scan SSIDs: 4
	max scan IEs length: 2285 bytes
	max # sched scan SSIDs: 0
	max # match sets: 0
	max # scan plans: 1
	max scan plan interval: -1
	max scan plan iterations: 0
	Retry short limit: 7
	Retry long limit: 4
	Coverage class: 0 (up to 0m)
	Device supports RSN-IBSS.
	Supported Ciphers:
		* WEP40 (00-0f-ac:1)
		* WEP104 (00-0f-ac:5)
		* TKIP (00-0f-ac:2)
		* CCMP-128 (00-0f-ac:4)
		* CCMP-256 (00-0f-ac:10)
		* GCMP-128 (00-0f-ac:8)
		* GCMP-256 (00-0f-ac:9)
	Available Antennas: TX 0 RX 0
	Supported interface modes:
		 * IBSS
		 * managed
		 * monitor
	Band 1:
		Bitrates (non-HT):
			* 1.0 Mbps
			* 2.0 Mbps
			* 5.5 Mbps
			* 11.0 Mbps
			* 6.0 Mbps
			* 9.0 Mbps
			* 12.0 Mbps
			* 18.0 Mbps
			* 24.0 Mbps
			* 36.0 Mbps
			* 48.0 Mbps
			* 54.0 Mbps
		Frequencies:
			* 2412 MHz [1] (20.0 dBm)
			* 2417 MHz [2] (20.0 dBm)
			* 2422 MHz [3] (20.0 dBm)
			* 2427 MHz [4] (20.0 dBm)
			* 2432 MHz [5] (20.0 dBm)
			* 2437 MHz [6] (20.0 dBm)
			* 2442 MHz [7] (20.0 dBm)
			* 2447 MHz [8] (20.0 dBm)
			* 2452 MHz [9] (20.0 dBm)
			* 2457 MHz [10] (20.0 dBm)
			* 2462 MHz [11] (20.0 dBm)
			* 2467 MHz [12] (20.0 dBm) (no IR)
			* 2472 MHz [13] (20.0 dBm)
			* 2484 MHz [14] (20.0 dBm) (no IR)
	Supported commands:
		 * new_interface
		 * set_interface
		 * new_key
		 * start_ap
		 * new_station
		 * new_mpath
		 * set_mesh_config
		 * set_bss
		 * authenticate
		 * associate
		 * deauthenticate
		 * disassociate
		 * join_ibss
		 * join_mesh
		 * set_tx_bitrate_mask
		 * frame
		 * frame_wait_cancel
		 * set_wiphy_netns
		 * set_channel
		 * set_wds_peer
		 * probe_client
		 * set_noack_map
		 * register_beacons
		 * start_p2p_device
		 * set_mcast_rate
		 * connect
		 * disconnect
		 * set_qos_map
	Supported TX frame types:
		 * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
	Supported RX frame types:
		 * IBSS: 0x40 0xb0 0xc0 0xd0
		 * managed: 0x40 0xd0
		 * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * mesh point: 0xb0 0xc0 0xd0
		 * P2P-client: 0x40 0xd0
		 * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * P2P-device: 0x40 0xd0
	software interface modes (can always be added):
		 * monitor
	interface combinations are not supported
	HT Capability overrides:
		 * MCS: ff ff ff ff ff ff ff ff ff ff
		 * maximum A-MSDU length
		 * supported channel width
		 * short GI for 40 MHz
		 * max A-MPDU length exponent
		 * min MPDU start spacing
	Device supports TX status socket option.
	Device supports HT-IBSS.
	Device supports SAE with AUTHENTICATE command
	Device supports low priority scan.
	Device supports scan flush.
	Device supports AP scan.
	Device supports per-vif TX power setting
	Driver supports full state transitions for AP/GO clients
	Driver supports a userspace MPM
	Device supports configuring vdev MAC-addr on create.
Wiphy phy0
	max # scan SSIDs: 20
	max scan IEs length: 95 bytes
	max # sched scan SSIDs: 0
	max # match sets: 0
	max # scan plans: 1
	max scan plan interval: -1
	max scan plan iterations: 0
	Retry short limit: 7
	Retry long limit: 4
	Coverage class: 0 (up to 0m)
	Device supports RSN-IBSS.
	Supported Ciphers:
		* WEP40 (00-0f-ac:1)
		* WEP104 (00-0f-ac:5)
		* TKIP (00-0f-ac:2)
		* CCMP-128 (00-0f-ac:4)
		* CCMP-256 (00-0f-ac:10)
		* GCMP-128 (00-0f-ac:8)
		* GCMP-256 (00-0f-ac:9)
	Available Antennas: TX 0 RX 0
	Supported interface modes:
		 * IBSS
		 * managed
		 * monitor
	Band 1:
		Capabilities: 0x107e
			HT20/HT40
			SM Power Save disabled
			RX Greenfield
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 3839 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 4 usec (0x05)
		HT Max RX data rate: 300 Mbps
		HT TX/RX MCS rate indexes supported: 0-15
		Bitrates (non-HT):
			* 1.0 Mbps
			* 2.0 Mbps (short preamble supported)
			* 5.5 Mbps (short preamble supported)
			* 11.0 Mbps (short preamble supported)
			* 6.0 Mbps
			* 9.0 Mbps
			* 12.0 Mbps
			* 18.0 Mbps
			* 24.0 Mbps
			* 36.0 Mbps
			* 48.0 Mbps
			* 54.0 Mbps
		Frequencies:
			* 2412 MHz [1] (15.0 dBm)
			* 2417 MHz [2] (15.0 dBm)
			* 2422 MHz [3] (15.0 dBm)
			* 2427 MHz [4] (15.0 dBm)
			* 2432 MHz [5] (15.0 dBm)
			* 2437 MHz [6] (15.0 dBm)
			* 2442 MHz [7] (15.0 dBm)
			* 2447 MHz [8] (15.0 dBm)
			* 2452 MHz [9] (15.0 dBm)
			* 2457 MHz [10] (15.0 dBm)
			* 2462 MHz [11] (15.0 dBm)
			* 2467 MHz [12] (15.0 dBm) (no IR)
			* 2472 MHz [13] (15.0 dBm) (no IR)
	Band 2:
		Capabilities: 0x107e
			HT20/HT40
			SM Power Save disabled
			RX Greenfield
			RX HT20 SGI
			RX HT40 SGI
			No RX STBC
			Max AMSDU length: 3839 bytes
			DSSS/CCK HT40
		Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
		Minimum RX AMPDU time spacing: 4 usec (0x05)
		HT Max RX data rate: 300 Mbps
		HT TX/RX MCS rate indexes supported: 0-15
		Bitrates (non-HT):
			* 6.0 Mbps
			* 9.0 Mbps
			* 12.0 Mbps
			* 18.0 Mbps
			* 24.0 Mbps
			* 36.0 Mbps
			* 48.0 Mbps
			* 54.0 Mbps
		Frequencies:
			* 5180 MHz [36] (15.0 dBm) (no IR)
			* 5200 MHz [40] (15.0 dBm) (no IR)
			* 5220 MHz [44] (15.0 dBm) (no IR)
			* 5240 MHz [48] (15.0 dBm) (no IR)
			* 5260 MHz [52] (15.0 dBm) (no IR, radar detection)
			* 5280 MHz [56] (15.0 dBm) (no IR, radar detection)
			* 5300 MHz [60] (15.0 dBm) (no IR, radar detection)
			* 5320 MHz [64] (15.0 dBm) (no IR, radar detection)
			* 5500 MHz [100] (15.0 dBm) (no IR, radar detection)
			* 5520 MHz [104] (15.0 dBm) (no IR, radar detection)
			* 5540 MHz [108] (15.0 dBm) (no IR, radar detection)
			* 5560 MHz [112] (15.0 dBm) (no IR, radar detection)
			* 5580 MHz [116] (15.0 dBm) (no IR, radar detection)
			* 5600 MHz [120] (15.0 dBm) (no IR, radar detection)
			* 5620 MHz [124] (15.0 dBm) (no IR, radar detection)
			* 5640 MHz [128] (15.0 dBm) (no IR, radar detection)
			* 5660 MHz [132] (15.0 dBm) (no IR, radar detection)
			* 5680 MHz [136] (15.0 dBm) (no IR, radar detection)
			* 5700 MHz [140] (15.0 dBm) (no IR, radar detection)
			* 5745 MHz [149] (15.0 dBm) (no IR)
			* 5765 MHz [153] (15.0 dBm) (no IR)
			* 5785 MHz [157] (15.0 dBm) (no IR)
			* 5805 MHz [161] (15.0 dBm) (no IR)
			* 5825 MHz [165] (15.0 dBm) (no IR)
	Supported commands:
		 * new_interface
		 * set_interface
		 * new_key
		 * start_ap
		 * new_station
		 * new_mpath
		 * set_mesh_config
		 * set_bss
		 * authenticate
		 * associate
		 * deauthenticate
		 * disassociate
		 * join_ibss
		 * join_mesh
		 * set_tx_bitrate_mask
		 * frame
		 * frame_wait_cancel
		 * set_wiphy_netns
		 * set_channel
		 * set_wds_peer
		 * probe_client
		 * set_noack_map
		 * register_beacons
		 * start_p2p_device
		 * set_mcast_rate
		 * connect
		 * disconnect
		 * set_qos_map
	Supported TX frame types:
		 * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
		 * P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
	Supported RX frame types:
		 * IBSS: 0x40 0xb0 0xc0 0xd0
		 * managed: 0x40 0xd0
		 * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * mesh point: 0xb0 0xc0 0xd0
		 * P2P-client: 0x40 0xd0
		 * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
		 * P2P-device: 0x40 0xd0
	software interface modes (can always be added):
		 * monitor
	interface combinations are not supported
	HT Capability overrides:
		 * MCS: ff ff ff ff ff ff ff ff ff ff
		 * maximum A-MSDU length
		 * supported channel width
		 * short GI for 40 MHz
		 * max A-MPDU length exponent
		 * min MPDU start spacing
	Device supports TX status socket option.
	Device supports HT-IBSS.
	Device supports SAE with AUTHENTICATE command
	Device supports scan flush.
	Device supports per-vif TX power setting
	Driver supports full state transitions for AP/GO clients
	Driver supports a userspace MPM
	Device supports static SMPS
	Device supports dynamic SMPS
	Device supports configuring vdev MAC-addr on create.

Last edited by penguin (2017-05-01 14:48:30)

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#2 2017-04-29 21:24:18

gnox
Member
Registered: 2013-05-18
Posts: 86

Re: [SOLVED] Use computer to provide wifi access?

Same wiki page : create_ap in laptop A.

pacman -S create_ap
create_ap -w 2 wlan0 eth0 <newssid> <pass>

Last edited by gnox (2017-04-29 21:25:34)

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#3 2017-04-30 01:37:46

ErSoul
Member
Registered: 2012-01-26
Posts: 54

Re: [SOLVED] Use computer to provide wifi access?

You're not looking for an Ad-Hoc connection. Use hostapd instead.

Also, if you have NetworkManager or WICD on computer A, things get simplified...

Last edited by ErSoul (2017-04-30 01:47:18)

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#4 2017-05-01 14:48:08

penguin
Member
From: Gotham City
Registered: 2010-12-31
Posts: 168

Re: [SOLVED] Use computer to provide wifi access?

thanks. create_ap seems very useful.

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