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bradfitz/vizinternal
fran/fix-appc-routes
irbekrm/egressconfig
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angott/doh-clients-sleep-mode
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knyar/usermetrics-wgengine
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irbekrm/fix
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dsnet/httpio
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irbekrm/conf
raggi/stun-subprocess
andrew/nixos-vm-tests
irbekrm/set_args
andrew/peer-ipv6-addrs
irbekrm/external_services
irbekrm/os
irbekrm/pull_in_certs
irbekrm/kube_build_tags
release-branch/1.56
jwhited/derp-cmm-timestamp
soniaappasamy/use-swr
marwan/displayname
release-branch/1.54
danderson/debug-garden
jwhited/unsafe-exp
clairew/test-wrapper-file
bradfitz/compontent_logs
kradalby-keys-db-interface
kradalby/keys-db-interface
andrew/upnp-unfork
bm/tsoidc
irbekrm/le
knyar/restartmap
kristoffer/editable-tailnet-displayname
raggi/document-deprecated-approach
dsnet/statestore
awly/version-override
bradfitz/silentdisco_knob
richard/15372
raggi/icmplistener
awly/linux-sudoers-local-admin-poc
release-branch/1.52
soniaappasamy/web-auth-restructure
bradfitz/ipx_set_contains
knyar/derpmesh
irbekrm/chartandcli
richard/15037-2
bradfitz/linuxfw_nil_table
richard/15037
bradfitz/tbug
bradfitz/derp_mesh
will/sonia/web-tailscaled
tyler/serve-status
maisem/ni
maisem/hi
rhea/apple-test
dgentry-nix-flake
dgentry-coverage
c761d10
bradfitz/gocross_wantver
awly/ipnlocal-watchnotifications-clientversion
bradfitz/integration_more_tun
bradfitz/recursive_controlknob
dgentry-authkey
dependabot/npm_and_yarn/cmd/tsconnect/postcss-8.4.31
bm/4via6
bradfitz/sessionactivetimeout
release-branch/1.50
rhea/taildrop-resume
andrew/peercap-ipv6-aaaa
irbekrm/k8sipnftheuristics
irbekrm/kubeipnft
irbekrm/k8sipnft
dgentry-istoreos
knyar/posturemac
irbekrm/egress
raggi/restore-extra-records-dns
aaron/win_process_mitigations
danderson/lru-rollback
clairew/mdm-interface
angott/userdefaults-reader
andrew/bump-esbuild
andrew/netns-more-logging
release-branch/1.48
irbekrm/k8s-autopilot
dsnet/viewer-jsonv2
marwan/altmem_stash
irbekrm/k8s-nftables
marwan/postmem
maisem/fix-deadlock
bradfitz/matrix
irbekrm/egress-dns
bradfitz/wait_unpause
bradfitz/calc_state
irbekrm/svc_conditions
soniaappasamy/fix-test-flake
marwan/servedev
soniaappasamy/fix-web-client-lock
raggi/netfilter-runtime
raggi/netfilter-add-modes
marwan/scmem
bradfitz/ignore_ula
clairew/tstime-net
clairew/tstime-wgengine
bradfitz/tkasig_type
shayne/k8s-serve
bradfitz/gui_netmap
macsys-update
catzkorn/netcheckuout
andrew/doctor-conntrack
tsweb/client-ui
valscale/ptb
raggi/gotoolchain
irbekrm/improve_logout
maisem/doc
rhea/egress
noncombatant/large-int-string
release-branch/1.46
andrew/captive-portal-package
s/pmtud
andrew/derp-bound-latency
andrew/health-state
bradfitz/gokrazy_dns
clairew/use-tstime-etc
bradfitz/negdep
raggi/stunc
raggi/gvisor-hostarch-deptest
crawshaw/art-table
irbekrm/fix_logout_loop
clairew/refactor-new-timer
clairew/test-wrapper-write-file
s/tsnetd
bradfitz/countrycode
crawshaw/stunchild
tom/disco
raggi/v6masq
release-branch/1.42
raggi/heartbeat-timebomb
raggi/derp-probe-stun-loss
raggi/tsdebugger
tom/derp
andrew/ipn-debug-1.42.0
marwan/portlistrefactor
marwan/noconstructor
angott/allow-thunderbolt-bridge
marwan/polleropts
marwan/noconstructor2
andrew/slicesx-deduplicate
unraid-web
release-branch/1.40
kristoffer/enable-mips-pkgs
s/eq
raggi/atomiccloseonce
raggi/bump-goreleaserv2
marwan/tmp
catzkorn/addrsend
raggi/gofuzz
shayne/funnel_cmd
release-branch/1.38
dgentry/atomicfile
tom/tka6
maisem/k8s-cache
azure
andrew/fastjson
crawshaw/lnclose
crawshaw/tsnet1
crawshaw/httpconnect
Xe/tsnet-funnel
dgentry/sniproxy-dns
andrew/util-dnsconfig
andrew/cloudenv-location
release-branch/1.36
aaron/migrate_windows
crawshaw/pidlisten
andrew/router-drop-ula
will/vizerr
danderson/mkversion
crawshaw/activesum
andrew/doctor-scutil
danderson/version-private3
bradfitz/sassy
bradfitz/win_unattended_warning
andrew/hostinfo-HavePortMap
skriptble/ssh-recording-persist
crawshaw/ondemanddomains
danderson/helm
andrew/peer-status-KeyExpiry
bradfitz/noise_debug_more
release-branch/1.34
cloner
danderson/backport
clairew/tsnet_get_own_ip
bradfitz/tidy
raggi/tsweb-compression
bradfitz/fix_ipn_cloner
danderson/bootstrap
will/enforce-hostname
mihaip/delete-all-profiles
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shayne/serve_empty_text_handler
bradfitz/hostinfo_ingress_bit
mihaip/logout-async-start
net-audit-log/1.32
bradfitz/set_prefs_locked
mihaip/fas
bradfitz/port_intercept
andrew/net-tsaddr-mapviaaddr
danderson/tsburrito
andrew/tstest-goroutine-ignore
andrew/monitor-link-change
danderson/k8s
andrew/debug-subnet-router
andrew/metrics-distribution
crawshaw/accumulatorcfg
bradfitz/keyboard-interactive
bradfitz/tailpipe
vm
raggi/accept-routes-filter
nyghtowl/tailnet-name2
dsnet/tunstats-v2
buildjet
buildjet-vs-github
andrew/netns-macos-route
walterp-api
andrew/linux-router-v4-disabled
bradfitz/distro_ubuntu
tom/iptables
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tom/tka2
andrew/dnscache-debugging-1.22.2
andrew/controlclient-dial
raggi/experiment-queues
bradfitz/u32
ip6tables
catzkorn/derp-benchmark
jwhited/wireguard-go-vectorized-bind
catzkorn/otel-init
bradfitz/appendf
mihaip/js-cli
dsnet/tsweb-499s
bradfitz/deephash_early_exit
crawshaw/xdp
dsnet/logtail-zstd-single-segment
Xe/gitops-pusher-three-version-problem
Xe/gitops-pusher-acl-test-error-output
Xe/gitops-pusher-ffcli
bradfitz/ssh_auth_none_demo
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catzkorn/otel-derp
bradfitz/shared_split_dns
nyghtowl/fix-resolved
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bradfitz/explicit_empty_test_3808
crawshaw/preservenetinfo
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bradfitz/wasm_play
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raggi/netstack_fwd_close
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bradfitz/kmod
bradfitz/ssh_banner
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tom/integration
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bradfitz/derpy_cast
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aaron/go-ole-ref
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josh/tswebflags
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crawshaw/envtype
danderson/tsweb-server
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bradfitz/use_netstack_upstream
Xe/winui-bugreport-without-tailscaled
bradfitz/hostinfo_basically_equal
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aaron/loglog
aaron/dnsapc
bradfitz/demo_client_hijack
bradfitz/windns
bradfitz/exit_node_forward_dns
bradfitz/1.18.1
Xe/tailtlsproxy
bradfitz/allsrc
josh/peermap
danderson/ebpf
bradfitz/1_16_stress_netmap
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danderson/magicsock-node-key
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josh/immutable-views
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jknodt/logging
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Aadi/speedtest-tailscaled
dsnet/admin-cli
bradfitz/portmap_test
jknodt/portmap_test
upnpdebug
jknodt/upnp_reuse
crawshaw/peerdoh
josh/debug-flake
simenghe/pingresult-work
jknodt/derp_flow
tps/tailscaled
jknodt/vms_ref
jknodt/integ_test
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josh/coarsetime
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Xe/testcontrol-v6
jknodt/io-uring
simenghe/admin-ping-test
jknodt/periodic_probe
simenghe/isoping
Xe/private-logcatcher-in-process
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bradfitz/deephash_methods
crawshaw/deephash
josh/de-select-tstun-wrapper
Xe/debug-nixos-build
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jknodt/userderp
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crawshaw/wslresolvconf
jknodt/upnp
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rec_in_use_after_5_sec
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simeng-pingtest
Xe/test-install-script-libvirtd
apenwarr/check184
crawshaw/newbackendserver
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onebinary
Xe/synology-does-actually-work-with-subnet-routes-til
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josh/NewIPPort
josh/IPWithPort
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josh/opt-dp-wip
bradfitz/ping_notes
bradfitz/dropped_by_filter_logspam
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apenwarr/statefix
apenwarr/statetest
josh/wip/endpoint-serialize
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rosszurowski/cli-fix-typo
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bradfitz/sleep
naman/netstack-request-logging
naman/ephem-expand-range
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bradfitz/ip_of
crawshaw/localapi404
crawshaw/movefiles
crawshaw/socket
crawshaw/cgi
naman/netstack-subnet-routing
josh/wip/create-endpoint-no-public-key
Xe/log-target-registry-key
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bradfitz/ipv6_link_local_strip
bradfitz/darwin_gw
Xe/disallow-local-ip-for-exit-node
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crawshaw/upjson
bradfitz/proposed_1.4.6
bradfitz/derp_steer
crawshaw/tailscalestatus
Xe/reset-logid-on-logout-login
naman/netstack-incoming
mkramlich/macos-brew2
naman/netstack-outgoing-udp-test
mkramlich/macos-brew
bradfitz/proposed-1.4.5
peske/ifacewatcher
Xe/hello-vr
crawshaw/filchsync
Xe/derphttp-panic-fix
peske/elnotfound
Xe/rel-144-fix-ipv6-broken-in-tests
bradfitz/darwin_creds
josh/longblock
josh/udp-alloc-less
josh/simplify-filch
josh/remove-ipcgetfilter
Xe/envvar-name-TS
Xe/TS-envvar-name
Xe/do-windows-logserver-better
Xe/log-target-flag
crawshaw/ipuint
bradfitz/hello
bradfitz/linux_v6_off
bradfitz/call_me_maybe_eps
bradfitz/api_docs
alexbrainman/use_wg_dns_code
naman/netstack-use-tailscale-ip
josh/debug-TestLikelyHomeRouterIPSyscallExec
noerror-not-notimp
bradfitz/umaskless_permissions
naman/netstack-bump-version
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bradfitz/grafana_auth_proxy
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apenwarr/faketun
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crawshaw/derptimeout
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crawshaw/derpdial
crawshaw/ipn
crawshaw/e2e_test
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crawshaw/magicsock
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crawshaw/spray
crawshaw/br1
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tailscale/health
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Josh Bleecher Snyder 744de615f1 health, wgenegine: fix receive func health checks for the fourth time 
The old implementation knew too much about how wireguard-go worked.
As a result, it missed genuine problems that occurred due to unrelated bugs.

This fourth attempt to fix the health checks takes a black box approach.
A receive func is healthy if one (or both) of these conditions holds:

* It is currently running and blocked.
* It has been executed recently.

The second condition is required because receive functions
are not continuously executing. wireguard-go calls them and then
processes their results before calling them again.

There is a theoretical false positive if wireguard-go go takes
longer than one minute to process the results of a receive func execution.
If that happens, we have other problems.

Updates #1790

Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
 		4 years ago
..
health.go health, wgenegine: fix receive func health checks for the fourth time 4 years ago