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Jonathan Nobels 2b7f8b6be7 net/netmon: remove ChangeDelta.Major and start the TODOs ... updates tailscale/corp#33891 We've had some TODO's in netmon for ages related to asking more pointed questions of ChangeDelta. We're also seeing a lot of ChangeDelta's being flagged as "Major" when they are not interesting, triggering rebinds in wgengine that are not needed. This removes the "Major" flag and replaces it with a set of precomputed values that hint at what the ChangeDelta means. The dependencies are cleaned up a bit, notably removing dependency on netmon itself for calculating what is interesting, and what is not. This includes letting individual platforms set a bespoke global "IsInterestingInterface" function. This was only used on Darwin. RebindRequired roughly flows from how "Major" was historically calculated but includes some additional checks for various uninteresting events such as changes in interface addresses that shouldn't trigger a rebind to minimize thrashing. The individual values that we roll into RebindRequired are also exposed so that components consuming netmap.ChangeDelta can ask more targeted questions. Signed-off-by: Jonathan Nobels <jonathan@tailscale.com> wgengine/userspace: skip rebind and restun if all of our interfaces are down updates tailscale/corp#33891 Skip rebind and restun if we have called SetNetworkUp with false. Neither cares about this state and it's just flappy to try to reStun and rebind if there are no usable interfaces available. Signed-off-by: Jonathan Nobels <jonathan@tailscale.com> Add viability flag and fix bug in state		1 day ago
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ace	feature/ace: make ACE modular	2 months ago
art	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
bakedroots	tstest/tlstest: simplify, don't even bake in any keys	6 months ago
batching	net/batching: fix import formatting	2 weeks ago
captivedetection	syncs: add Mutex/RWMutex alias/wrappers for future mutex debugging	3 weeks ago
connectproxy	net/tlsdial: fix TLS cert validation of HTTPS proxies	6 months ago
dns	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
dnscache	syncs: add Mutex/RWMutex alias/wrappers for future mutex debugging	3 weeks ago
dnsfallback	feature, net/tshttpproxy: pull out support for using proxies as a feature	2 months ago
flowtrack	net/flowtrack: fix, test String method	1 year ago
ipset	all: use iterators over slice views more	1 year ago
ktimeout	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
memnet	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
netaddr	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
netcheck	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
neterror	net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791)	3 years ago
netkernelconf	all: remove non-applicable "linux" deps on Android	7 months ago
netknob	all: update copyright and license headers	3 years ago
netmon	net/netmon: remove ChangeDelta.Major and start the TODOs	1 day ago
netns	net/netns: remove spammy logs for interface binding caps	2 weeks ago
netstat	all: add test for package comments, fix, add comments as needed	1 year ago
netutil	syncs: add Mutex/RWMutex alias/wrappers for future mutex debugging	3 weeks ago
netx	net/{netx,memnet},all: add netx.DialFunc, move memnet Network impl	8 months ago
packet	net/tstun: add TSMPDiscoAdvertisement to TSMPPing (#17995)	2 weeks ago
ping	syncs: add Mutex/RWMutex alias/wrappers for future mutex debugging	3 weeks ago
portmapper	go.mod: bump golang.org/x/crypto (#17907)	3 weeks ago
proxymux	all: cleanup unused code, part 1 (#10661)	2 years ago
routetable	net/routetable: don't try to fetch the route table on android	8 months ago
sockopts	wgengine/magicsock,net/sockopts: export Windows ICMP suppression logic (#16917)	4 months ago
socks5	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
sockstats	net/netmon: remove ChangeDelta.Major and start the TODOs	1 day ago
speedtest	all: rename variables with lowercase-l/uppercase-I	3 weeks ago
stun	ci: enable checklocks workflow for specific packages	1 year ago
stunserver	all: use Go 1.22 range-over-int	2 years ago
tcpinfo	all: use Go 1.22 range-over-int	2 years ago
tlsdial	feature/featuretags, all: add build features, use existing ones in more places	2 months ago
tsaddr	net/tsaddr: include test input in test failure output	1 year ago
tsdial	types/netmap,*: remove some redundant fields from NetMap	3 weeks ago
tshttpproxy	go.mod: bump golang.org/x/crypto (#17907)	3 weeks ago
tstun	net/tstun: add TSMPDiscoAdvertisement to TSMPPing (#17995)	2 weeks ago
udprelay	net/udprelay: bind multiple sockets per af on Linux	3 days ago
wsconn	syncs: add Mutex/RWMutex alias/wrappers for future mutex debugging	3 weeks ago