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tailscale/net
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>
6 days ago
..
art all: fix new lint warnings from bumping staticcheck 3 months ago
captivedetection net/captivedetection: replace 10k log lines with ... less 6 days ago
connstats {net/connstats,wgengine/magicsock}: fix packet counting in connstats 1 month ago
dns net/dns: fix blank lines being added to resolv.conf on OpenBSD (#13928) 3 weeks ago
dnscache net/dnscache: don't fall back to an IPv6 dial if we don't have IPv6 2 months ago
dnsfallback {control,net}: close idle connections of custom transports 4 months ago
flowtrack net/flowtrack: fix, test String method 5 months ago
ipset all: use iterators over slice views more 1 week ago
ktimeout net/ktimeout: add a package to set TCP user timeout 9 months ago
memnet net/memnet: export the network name (#9111) 1 year ago
netaddr all: update copyright and license headers 2 years ago
netcheck net/netcheck: add addReportHistoryAndSetPreferredDERP() test case (#13989) 3 weeks ago
neterror net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791) 2 years ago
netkernelconf ipn/{ipnlocal,localapi},net/netkernelconf,client/tailscale,cmd/containerboot: optionally enable UDP GRO forwarding for containers (#12410) 5 months ago
netknob all: update copyright and license headers 2 years ago
netmon types/result, util/lineiter: add package for a result type, use it 2 weeks ago
netns net/netns: remove some logspam by avoiding logging parse errors due to unspecified addresses 4 months ago
netstat all: add test for package comments, fix, add comments as needed 4 months ago
netutil {ipn,net,tsnet}: use tsaddr helpers 2 months ago
packet wgengine/magicsock: actually use AF_PACKET socket for raw disco 3 months ago
ping net/ping: fix ICMP echo code field to 0 1 year ago
portmapper net/portmapper: don't treat 0.0.0.0 as a valid IP 2 months ago
proxymux all: cleanup unused code, part 1 (#10661) 11 months ago
routetable net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon 7 months ago
socks5 net/socks5: optimize UDP relay 3 weeks ago
sockstats net/sockstats: prevent crash in setNetMon (#13985) 3 weeks ago
speedtest all: update copyright and license headers 2 years ago
stun ci: enable checklocks workflow for specific packages 5 months ago
stunserver all: use Go 1.22 range-over-int 7 months ago
tcpinfo all: use Go 1.22 range-over-int 7 months ago
tlsdial net/tlsdial: call out firewalls blocking Tailscale in health warnings (#13840) 1 month ago
tsaddr all: use iterators over slice views more 1 week ago
tsdial all: use iterators over slice views more 1 week ago
tshttpproxy types/result, util/lineiter: add package for a result type, use it 2 weeks ago
tstun wgengine/magicsock: export packet drop metric for outbound errors 3 weeks ago
wsconn go.{mod,sum}: migrate from nhooyr.io/websocket to github.com/coder/websocket 3 months ago