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Alex Chan 7953592f40 tstest/integration: get TestOneNodeUpAuth to pass when offline ... How TestOneNodeUpAuth works: * it starts a test version of tailscaled * it runs `tailscale up` * it checks that tailscaled becomes "Running" However, if the network is down, the test either fails or times out, because tailscaled never becomes Running. ## Why does the test fail? ipn only becomes Running when it sees at least one live peer or DERP connection: 0cc1b2ff76/ipn/ipnlocal/local.go (L5861-L5866) The test only uses a single node, so it's never going to see a peer -- it has to wait to see a DERP server. The test environment does have a DERP map of in-memory DERP nodes, but we aren't connecting to them. magicsock sets the preferred DERP server in `updateNetInfo()`, but this function returns early if the network is down. 0cc1b2ff76/wgengine/magicsock/magicsock.go (L1053-L1106) Because we're checking the real network, this prevents ipn from entering "Running" and causes the test to fail. ## What's the fix? In tests, we can assume the network is up unless we're explicitly testing the behaviour of tailscaled when the network is down. We do something similar in magicsock/derp.go, where we assume we're connected to control unless explicitly testing otherwise: 7d2101f352/wgengine/magicsock/derp.go (L166-L177) This is the template for the changes to `networkDown()`. Additionally, the `testenv.InTest()` function currently checks for the `-test.v` flag, but this isn't visible to the version of tailscaled running in the test environment. Instead, we add a new `TEST` env var so this process knows it's inside a test. Fixes #17122 Signed-off-by: Alex Chan <alexc@tailscale.com>		3 months ago
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bench	all: update the tsd.System constructor name (#15372)	8 months ago
filter	wgengine/filter: add check for unknown proto	10 months ago
magicsock	tstest/integration: get TestOneNodeUpAuth to pass when offline	3 months ago
netlog	wgengine: add exit destination logging enable for wgengine logger (#11952)	2 years ago
netstack	wgengine/netstack: correctly proxy half-closed TCP connections	5 months ago
router	wgengine/router: rely on events for deleted IP rules (#16744)	4 months ago
wgcfg	go.mod,wgengine/magicsock: update wireguard-go (#16148)	6 months ago
wgint	wgengine{,/wgint}: add wgint.Peer wrapper type, add to wgengine.Engine	2 years ago
wglog	all: use Go 1.22 range-over-int	2 years ago
winnet	all: add test for package comments, fix, add comments as needed	1 year ago
mem_ios.go	all: update copyright and license headers	3 years ago
pendopen.go	all: add Node.HomeDERP int, phase out "127.3.3.40:$region" hack [capver 111]	11 months ago
userspace.go	ipn/ipnlocal,wgengine{/magicsock}: replace SetNetworkMap with eventbus (#16299)	6 months ago
userspace_ext_test.go	net/netmon: publish events to event bus	8 months ago
userspace_test.go	net/netmon: publish events to event bus	8 months ago
watchdog.go	feature/capture: move packet capture to feature/*, out of iOS + CLI	10 months ago
watchdog_js.go	all: update copyright and license headers	3 years ago
watchdog_test.go	net/netmon: publish events to event bus	8 months ago
wgengine.go	feature/capture: move packet capture to feature/*, out of iOS + CLI	10 months ago