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Mihai Parparita fa932fefe7 net/interfaces: redo how we get the default interface on macOS and iOS ... With #6566 we added an external mechanism for getting the default interface, and used it on macOS and iOS (see tailscale/corp#8201). The goal was to be able to get the default physical interface even when using an exit node (in which case the routing table would say that the Tailscale utun* interface is the default). However, the external mechanism turns out to be unreliable in some cases, e.g. when multiple cellular interfaces are present/toggled (I have occasionally gotten my phone into a state where it reports the pdp_ip1 interface as the default, even though it can't actually route traffic). It was observed that `ifconfig -v` on macOS reports an "effective interface" for the Tailscale utn* interface, which seems promising. By examining the ifconfig source code, it turns out that this is done via a SIOCGIFDELEGATE ioctl syscall. Though this is a private API, it appears to have been around for a long time (e.g. it's in the 10.13 xnu release at https://opensource.apple.com/source/xnu/xnu-4570.41.2/bsd/net/if_types.h.auto.html) and thus is unlikely to go away. We can thus use this ioctl if the routing table says that a utun* interface is the default, and go back to the simpler mechanism that we had before #6566. Updates #7184 Updates #7188 Signed-off-by: Mihai Parparita <mihai@tailscale.com>		1 year ago
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connstats	net/connstats: fix ticker in NewStatistics (#7225)	1 year ago
dns	net/dns/resolver: remove maxDoHInFlight	1 year ago
dnscache	all: update copyright and license headers	1 year ago
dnsfallback	all: update copyright and license headers	1 year ago
flowtrack	all: update copyright and license headers	1 year ago
interfaces	net/interfaces: redo how we get the default interface on macOS and iOS	1 year ago
memnet	net/memnet: rename from net/nettest	1 year ago
netaddr	all: update copyright and license headers	1 year ago
netcheck	all: update to Go 1.20, use strings.CutPrefix/Suffix instead of our fork	1 year ago
neterror	all: update copyright and license headers	1 year ago
netknob	all: update copyright and license headers	1 year ago
netns	net/interfaces, net/netns: add node attributes to control default interface getting and binding	1 year ago
netstat	net/{netns,netstat}: use new x/sys/cpu.IsBigEndian	1 year ago
netutil	net/netutil: only check Linux sysctls w/ procfs, assume absent means false	1 year ago
packet	all: update copyright and license headers	1 year ago
ping	all: update copyright and license headers	1 year ago
portmapper	all: update tools that manage copyright headers	1 year ago
proxymux	all: update copyright and license headers	1 year ago
routetable	net/routetable: include unknown flags in the routetable doctor output	1 year ago
socks5	all: update copyright and license headers	1 year ago
speedtest	all: update copyright and license headers	1 year ago
stun	all: use Go 1.20's bytes.Clone	1 year ago
tlsdial	health, net/tlsdial: add healthcheck for self-signed cert	1 year ago
tsaddr	all: update copyright and license headers	1 year ago
tsdial	all: update copyright and license headers	1 year ago
tshttpproxy	net/tshttpproxy: more directly use Transport proxy CONNECT hooks	1 year ago
tstun	wgengine: start logging DISCO frames to pcap stream	1 year ago
wsconn	all: update copyright and license headers	1 year ago