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4 Commits

Author SHA1 Message Date
James Tucker
10fe10ea10 derp/derphttp,ipn/localapi,net/captivedetection: add cache resistance to captive portal detection 
Observed on some airlines (British Airways, WestJet), Squid is
configured to cache and transform these results, which is disruptive.
The server and client should both actively request that this is not done
by setting Cache-Control headers.

Send a timestamp parameter to further work against caches that do not
respect the cache-control headers.

Updates #14856

Signed-off-by: James Tucker <james@tailscale.com>
 2025-02-03 10:15:26 -08:00
Brad Fitzpatrick
3b93fd9c44 net/captivedetection: replace 10k log lines with ... less 
We see tons of logs of the form:

    2024/11/15 19:57:29 netcheck: [v2] 76 available captive portal detection endpoints: [Endpoint{URL="http://192.73.240.161/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.240.121/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.240.132/generate_204", StatusCode=204, ExpectedContent="",
11:58SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://209.177.158.246/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://209.177.158.15/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://199.38.182.118/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.243.135/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.243.229/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.243.141/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://45.159.97.144/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://45.159.97.61/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://45.159.97.233/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://45.159.98.196/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://45.159.98.253/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://45.159.98.145/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://68.183.90.120/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://209.177.156.94/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.248.83/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://209.177.156.197/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://199.38.181.104/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://209.177.145.120/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://199.38.181.93/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://199.38.181.103/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://102.67.165.90/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://102.67.165.185/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://102.67.165.36/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.90.147/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.90.207/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.90.104/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://162.248.221.199/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://162.248.221.215/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://162.248.221.248/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://185.34.3.232/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://185.34.3.207/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://185.34.3.75/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://208.83.234.151/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://208.83.233.233/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://208.72.155.133/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://185.40.234.219/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://185.40.234.113/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://185.40.234.77/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://43.245.48.220/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://43.245.48.50/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://43.245.48.250/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.252.65/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.252.134/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://208.111.34.178/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://43.245.49.105/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://43.245.49.83/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://43.245.49.144/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.92.144/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.88.183/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.92.254/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://148.163.220.129/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://148.163.220.134/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://148.163.220.210/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.242.187/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.242.28/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.242.204/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.93.248/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.93.147/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://176.58.93.154/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://192.73.244.245/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://208.111.40.12/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://208.111.40.216/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://103.6.84.152/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://205.147.105.30/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://205.147.105.78/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://102.67.167.245/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://102.67.167.37/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://102.67.167.188/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://103.84.155.178/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://103.84.155.188/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://103.84.155.46/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=true, Provider=DERPMapOther} Endpoint{URL="http://controlplane.tailscale.com/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=false, Provider=Tailscale} Endpoint{URL="http://login.tailscale.com/generate_204", StatusCode=204, ExpectedContent="", SupportsTailscaleChallenge=false, Provider=Tailscale}]

That can be much shorter.

Also add a fast exit path to the concurrency on match. Doing 5 all at
once is still pretty gratuitous, though.

Updates #1634
Fixes #13019

Change-Id: Icdbb16572fca4477b0ee9882683a3ac6eb08e2f2
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2024-11-15 15:25:31 -08:00
Jordan Whited
17c88a19be
net/captivedetection: mark TestAllEndpointsAreUpAndReturnExpectedResponse flaky (#13021) 
Updates #13019

Signed-off-by: Jordan Whited <jordan@tailscale.com>
 2024-08-03 22:08:55 +00:00
Andrea Gottardo
90be06bd5b
health: introduce captive-portal-detected Warnable (#12707) 
Updates tailscale/tailscale#1634

This PR introduces a new `captive-portal-detected` Warnable which is set to an unhealthy state whenever a captive portal is detected on the local network, preventing Tailscale from connecting.



ipn/ipnlocal: fix captive portal loop shutdown


Change-Id: I7cafdbce68463a16260091bcec1741501a070c95

net/captivedetection: fix mutex misuse

ipn/ipnlocal: ensure that we don't fail to start the timer


Change-Id: I3e43fb19264d793e8707c5031c0898e48e3e7465

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
 2024-07-26 11:25:55 -07:00