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Andrew Dunham e107977f75 wgengine/magicsock: disable SIO_UDP_NETRESET on Windows ... By default, Windows sets the SIO_UDP_CONNRESET and SIO_UDP_NETRESET options on created UDP sockets. These behaviours make the UDP socket ICMP-aware; when the system gets an ICMP message (e.g. an "ICMP Port Unreachable" message, in the case of SIO_UDP_CONNRESET), it will cause the underlying UDP socket to throw an error. Confusingly, this can occur even on reads, if the same UDP socket is used to write a packet that triggers this response. The Go runtime disabled the SIO_UDP_CONNRESET behavior in 3114bd6, but did not change SIO_UDP_NETRESET–probably because that socket option isn't documented particularly well. Various other networking code seem to disable this behaviour, such as the Godot game engine (godotengine/godot#22332) and the Eclipse TCF agent (link below). Others appear to work around this by ignoring the error returned (anacrolix/dht#16, among others). For now, until it's clear whether this ends up in the upstream Go implementation or not, let's also disable the SIO_UDP_NETRESET in a similar manner to SIO_UDP_CONNRESET. Eclipse TCF agent: https://gitlab.eclipse.org/eclipse/tcf/tcf.agent/-/blob/master/agent/tcf/framework/mdep.c Updates #10976 Updates golang/go#68614 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I70a2f19855f8dec1bfb82e63f6d14fc4a22ed5c3		3 months ago
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batching_conn.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago
batching_conn_default.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago
batching_conn_linux.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago
batching_conn_linux_test.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago
blockforever_conn.go	wgengine/magicsock: improve don't fragment bit set/get support	1 year ago
cloudinfo.go	wgengine/magicsock: use cloud metadata to get public IPs	4 months ago
cloudinfo_nocloud.go	wgengine/magicsock: use cloud metadata to get public IPs	4 months ago
cloudinfo_test.go	wgengine/magicsock: use cloud metadata to get public IPs	4 months ago
debughttp.go	all: remove LenIter, use Go 1.22 range-over-int instead	9 months ago
debugknobs.go	wgengine/magicsock: allow a CSV list for pretendpoint	4 months ago
debugknobs_stubs.go	wgengine/magicsock: allow a CSV list for pretendpoint	4 months ago
derp.go	control/controlknobs,tailcfg,wgengine/magicsock: remove DRPO shutoff switch	5 months ago
derp_test.go	net/netcheck,wgengine/magicsock: align DERP frame receive time heuristics	8 months ago
discopingpurpose_string.go	wgengine/magicsock: implement probing of UDP path lifetime (#10844)	10 months ago
endpoint.go	all: use math/rand/v2 more	6 months ago
endpoint_default.go	all: adjust some build tags for plan9	1 year ago
endpoint_stub.go	all: adjust some build tags for plan9	1 year ago
endpoint_test.go	wgengine/magicsock: implement probing of UDP path lifetime (#10844)	10 months ago
endpoint_tracker.go	wgengine/magicsock: only cache N most recent endpoints per-Addr	1 year ago
endpoint_tracker_test.go	all: use Go 1.22 range-over-int	7 months ago
magicsock.go	wgengine/magicsock: disable SIO_UDP_NETRESET on Windows	3 months ago
magicsock_default.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago
magicsock_linux.go	cmd/tta, vnet: add host firewall, env var support, more tests	3 months ago
magicsock_notwindows.go	wgengine/magicsock: disable SIO_UDP_NETRESET on Windows	3 months ago
magicsock_test.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago
magicsock_unix_test.go	all: update copyright and license headers	2 years ago
magicsock_windows.go	wgengine/magicsock: disable SIO_UDP_NETRESET on Windows	3 months ago
peermap.go	wgengine/magicsock: allow disco communication without known endpoints	7 months ago
peermtu.go	magicsock: mute noisy expected peer mtu related error (#10870)	10 months ago
peermtu_darwin.go	wgengine/magicsock: improve don't fragment bit set/get support	1 year ago
peermtu_linux.go	wgengine/magicsock: improve don't fragment bit set/get support	1 year ago
peermtu_stubs.go	magicsock: mute noisy expected peer mtu related error (#10870)	10 months ago
peermtu_unix.go	wgengine/magicsock: replace CanPMTUD() with ShouldPMTUD()	1 year ago
rebinding_conn.go	wgengine/magicsock: refactor batchingUDPConn to batchingConn interface (#13042)	4 months ago