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tailscale/net
Andrew Dunham 286c6ce27c
net/dns/resolver: race UDP and TCP queries (#9544)
Instead of just falling back to making a TCP query to an upstream DNS
server when the UDP query returns a truncated query, also start a TCP
query in parallel with the UDP query after a given race timeout. This
ensures that if the upstream DNS server does not reply over UDP (or if
the response packet is blocked, or there's an error), we can still make
queries if the server replies to TCP queries.

This also adds a new package, util/race, to contain the logic required for
racing two different functions and returning the first non-error answer.

Updates tailscale/corp#14809

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I4311702016c1093b1beaa31b135da1def6d86316
2 years ago
..
art net/art: allow non-pointers as values 2 years ago
connstats net/connstats: exclude traffic with internal Tailscale service (#7904) 3 years ago
dns net/dns/resolver: race UDP and TCP queries (#9544) 2 years ago
dnscache tstest: prepare for Clock API changes 2 years ago
dnsfallback net/dnsfallback: remove net/dnsfallback go:generate line 2 years ago
flowtrack all: update copyright and license headers 3 years ago
interfaces net/tsdial: be smarter about when to close SystemDial conns 2 years ago
memnet net/memnet: export the network name (#9111) 2 years ago
netaddr all: update copyright and license headers 3 years ago
netcheck net/netcheck,wgengine/magicsock: reduce coupling between netcheck and magicsock 2 years ago
neterror net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791) 3 years ago
netknob all: update copyright and license headers 3 years ago
netmon net/netmon: log when the gateway/self IP changes 2 years ago
netns net/{interfaces,netmon}: remove "interesting", EqualFiltered API 2 years ago
netstat net/{netns,netstat}: use new x/sys/cpu.IsBigEndian 3 years ago
netutil cmd/tailscale: refactor shared utility methods 2 years ago
packet net/packet: implement methods for rewriting v6 addresses 2 years ago
ping net/ping: fix ICMP echo code field to 0 2 years ago
portmapper net/portmapper: fix invalid UPnP metric name 2 years ago
proxymux all: update copyright and license headers 3 years ago
routetable net/routetable: include unknown flags in the routetable doctor output 3 years ago
socks5 net/socks5: add password auth support 3 years ago
sockstats net/dns: retry forwarder requests over TCP 2 years ago
speedtest all: update copyright and license headers 3 years ago
stun wgengine/magicsock, types/nettype, etc: finish ReadFromUDPAddrPort netip migration 3 years ago
tcpinfo net/tcpinfo: add package to allow fetching TCP information 2 years ago
tlsdial cmd/tailscale/cli: make netcheck run even if machine lacks TLS certs 2 years ago
tsaddr types/netmap: remove NetworkMap.{Addresses,MachineStatus} 2 years ago
tsdial types/netmap: remove NetworkMap.{Addresses,MachineStatus} 2 years ago
tshttpproxy net/tshttpproxy: don't proxy through ourselves 3 years ago
tstun net/tstun: remove unused function DefaultMTU() 2 years ago
wsconn net/wsconn: accept a remote addr string and plumb it through 2 years ago