1070 Commits (4c2e978f1e29b530f8b0a05f007c87eb4b2de8cb)

Author	SHA1	Message	Date
Brad Fitzpatrick	d0baece5fa	go.mod: bump inet.af/netaddr to non-allocating version	4 years ago
Brad Fitzpatrick	053a1d1340	all: annotate log verbosity levels on most egregiously spammy log prints ... Fixes #924 Fixes #282 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	baa7937998	net/interfaces: return IPv6 addresses from LocalAddresses. ... In practice, we already provide IPv6 endpoint addresses via netcheck, and that address is likely to match a local address anyway (i.e. no NAT66). The comment at that piece of the code mentions needing to figure out a good priority ordering, but that only applies to non-active-discovery clients, who already don't do anything with IPv6 addresses. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	aa353b8d0f	net/packet: add an IP6 constructor from a raw byte array. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Josh Bleecher Snyder	a6cad71fb2	go.mod: upgrade staticcheck to 0.1.0 ... Also run go.mod and fix some staticcheck warnings. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	08f94b3b50	net/netcheck: fix offset of unspecified address in PCP request packet ... Fixes #810	4 years ago
Brad Fitzpatrick	05e5233e07	net/netcheck: don't send flood of PCP unmap requests to router ... Updates #810	4 years ago
Josh Bleecher Snyder	1ebbaaaebb	net/interfaces: make syscall and netstat agree when multiple gateways are present ... likelyHomeRouterIPDarwinSyscall iterates through the list of routes, looking for a private gateway, returning the first one it finds. likelyHomeRouterIPDarwinExec does the same thing, except that it returns the last one it finds. As a result, when there are multiple gateways, TestLikelyHomeRouterIPSyscallExec fails. (At least, I think that that is what is happening; I am going inferring from observed behavior.) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	5d96ecd5e6	net/netstat: remove a bit more unsafe ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
David Anderson	3c508a58cc	wgengine/filter: don't filter GCP DNS. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	7a01cd27ca	net/netstat: remove some unsafe ... Just removing any unnecessary unsafe while auditing unsafe usage for #921.	4 years ago
Brad Fitzpatrick	45d96788b5	net/netns: remove use of unsafe on Windows ... Found while auditing unsafe for #921 via the list at: https://github.com/tailscale/tailscale/issues/921#issuecomment-727365383 No need for unsafe here, so remove it.	4 years ago
Josh Bleecher Snyder	b0526e8284	net/packet: remove unnecessary mark ... There's no need to mask out the bottom four bits of b[0] if we are about to shift them away.	4 years ago
Josh Bleecher Snyder	efad55cf86	net/packet: speed up packet decoding ... The compiler is failing to draw the connection between slice cap and slice len, so is missing some obvious BCE opportunities. Give it a hint by making the cap equal to the length. The generated code is smaller and cleaner, and a bit faster. name old time/op new time/op delta Decode/tcp4-8 12.2ns ± 1% 11.6ns ± 3% -5.31% (p=0.000 n=28+29) Decode/tcp6-8 12.5ns ± 2% 11.9ns ± 2% -4.84% (p=0.000 n=30+30) Decode/udp4-8 11.5ns ± 1% 11.1ns ± 1% -3.11% (p=0.000 n=25+24) Decode/udp6-8 11.8ns ± 3% 11.4ns ± 1% -3.08% (p=0.000 n=30+26) Decode/icmp4-8 11.0ns ± 3% 10.6ns ± 1% -3.38% (p=0.000 n=25+30) Decode/icmp6-8 11.4ns ± 1% 11.1ns ± 2% -2.29% (p=0.000 n=27+30) Decode/igmp-8 10.3ns ± 0% 10.0ns ± 1% -3.26% (p=0.000 n=19+23) Decode/unknown-8 8.68ns ± 1% 8.38ns ± 1% -3.55% (p=0.000 n=28+29)	4 years ago
David Anderson	2d604b3791	net/packet: represent IP6 as two uint64s. ... For the operations we perform on these types (mostly net6.Contains), this encoding is much faster. Part of #19. name old time/op new time/op delta Filter/icmp4-8 27.5ns ± 1% 28.0ns ± 2% +1.89% (p=0.016 n=5+5) Filter/tcp4_syn_in-8 38.8ns ± 2% 38.3ns ± 1% -1.24% (p=0.024 n=5+5) Filter/tcp4_syn_out-8 27.6ns ±12% 24.6ns ± 1% ~ (p=0.063 n=5+5) Filter/udp4_in-8 71.5ns ± 5% 65.9ns ± 1% -7.94% (p=0.008 n=5+5) Filter/udp4_out-8 132ns ±13% 119ns ± 1% -10.29% (p=0.008 n=5+5) Filter/icmp6-8 169ns ±10% 54ns ± 1% -68.35% (p=0.008 n=5+5) Filter/tcp6_syn_in-8 149ns ± 6% 43ns ± 1% -71.11% (p=0.008 n=5+5) Filter/tcp6_syn_out-8 37.7ns ± 4% 24.3ns ± 3% -35.51% (p=0.008 n=5+5) Filter/udp6_in-8 179ns ± 5% 103ns ± 1% -42.75% (p=0.008 n=5+5) Filter/udp6_out-8 156ns ± 3% 191ns ± 1% +22.54% (p=0.008 n=5+5) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	04ff3c91ee	wgengine/filter: add full IPv6 support. ... Part of #19. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	a2d78b4d3e	net/dnscache, control/controlclient: use DNS cache when dialing control ... Cache DNS results of earlier login.tailscale.com control dials, and use them for future dials if DNS is slow or broken. Fixes various issues with trickier setups with the domain's DNS server behind a subnet router. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	97e82c6cc0	net/netcheck: remove unused DNSCache from netcheck ... It's easy to add back later if/when the TODO is implemented.	4 years ago
Brad Fitzpatrick	19b0cfe89e	all: prepare for GOOS=ios in Go 1.16 ... Work with either way for now on iOS (darwin/arm64 vs ios/arm64). In February when Go 1.16 comes out we'll have a universal binary for darwin/arm64 (macOS) and will drop support for Go 1.15 and its darwin/amd64 meaning iOS. (it'll mean macOS). Context: * https://tip.golang.org/doc/go1.16#darwin * https://github.com/golang/go/issues/38485 * https://github.com/golang/go/issues/42100	4 years ago
David Anderson	a38e28da07	net/packet: documentation pass. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	c2cc3acbaf	net/packet: remove NewIP, offer only a netaddr constructor. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	d7ee3096dd	net/packet: documentation cleanups. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9ef39af2f2	net/packet: fix panic on invalid IHL field. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	22bf48f37c	net/packet: remove {get,put}{16,32} indirection to encoding/binary. ... name old time/op new time/op delta Decode/tcp4-8 28.8ns ± 2% 13.1ns ± 4% -54.44% (p=0.008 n=5+5) Decode/tcp6-8 20.6ns ± 1% 12.6ns ± 2% -38.72% (p=0.008 n=5+5) Decode/udp4-8 28.2ns ± 1% 12.1ns ± 4% -57.01% (p=0.008 n=5+5) Decode/udp6-8 20.0ns ± 6% 12.1ns ± 2% -39.38% (p=0.008 n=5+5) Decode/icmp4-8 21.7ns ± 2% 11.5ns ± 1% -47.01% (p=0.008 n=5+5) Decode/icmp6-8 14.1ns ± 2% 11.8ns ± 4% -16.60% (p=0.008 n=5+5) Decode/unknown-8 9.43ns ± 2% 9.30ns ± 3% ~ (p=0.222 n=5+5) Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	55b1221db2	net/packet: support full IPv6 decoding. ... The packet filter still rejects all IPv6, but decodes enough from v6 packets to do something smarter in a followup. name time/op Decode/tcp4-8 28.8ns ± 2% Decode/tcp6-8 20.6ns ± 1% Decode/udp4-8 28.2ns ± 1% Decode/udp6-8 20.0ns ± 6% Decode/icmp4-8 21.7ns ± 2% Decode/icmp6-8 14.1ns ± 2% Decode/unknown-8 9.43ns ± 2% Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	89894c6930	net/packet: add IPv6 source and destination IPs to Parsed. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	d192bd0f86	net/interfaces: ignore bogus proxy URLs from winhttp [windows] ... Updates tailscale/corp#853	4 years ago
David Anderson	6e52633c53	net/packet: record allocations in benchmark.	4 years ago
David Anderson	093431f5dd	net/packet: s/ParsedPacket/Parsed/ to avoid package stuttering. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	427bf2134f	net/packet: rename from wgengine/packet. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	1036f51a56	net/tshttpproxy: aggressively rate-limit error logs in Transport.Proxy path ... Otherwise log upload HTTP requests generate proxy errrors which generate logs which generate HTTP requests which generate proxy errors which generate more logs, etc. Fixes #879	4 years ago
Brad Fitzpatrick	7ac91c15bd	net/netcheck: fix tests on Windows ... Updates #50	4 years ago
Brad Fitzpatrick	fd2a30cd32	wgengine/magicsock: make test pass on Windows and without firewall dialog box ... Updates #50	4 years ago
David Anderson	5c35c35e7f	tsaddr: add helpers for the Tailscale IPv6 range, and 4to6 conversion. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	551e1e99e9	net/netns: don't bind to device for localhost connections ... Fixes derphttp test failures on Windows (for #50).	4 years ago
Alex Brainman	f2ce64f0c6	wgengine/router: unfork winipcfg-go package, use upstream ... Use golang.zx2c4.com/wireguard/windows/tunnel/winipcfg instead of github.com/tailscale/winipcfg-go package. Updates #760 Signed-off-by: Alex Brainman <alex.brainman@gmail.com>	4 years ago
Brad Fitzpatrick	6ee219a25d	ipn, wgengine, magicsock, tsdns: be quieter and less aggressive when offline ... If no interfaces are up, calm down and stop spamming so much. It was noticed as especially bad on Windows, but probably was bad everywhere. I just have the best network conditions testing on a Windows VM. Updates #604	4 years ago
Brad Fitzpatrick	587bdc4280	ipn, wgengine: disable subnet routes if network has PAC configuration ... Not configurable yet. Updates tailscale/corp#653 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ed5d5f920f	net/interfaces: add interfaces.State.String method	4 years ago
Brad Fitzpatrick	cab3eb995f	net/interfaces: quiet PAC detection logging in no-PAC case, add benchmark	4 years ago
Brad Fitzpatrick	8051ecff55	net/interfaces: add State.PAC field, populate it on Windows ... Not used for anything yet (except logging), but populate the current proxy autoconfig PAC URL in Interfaces.State. A future change will do things based on it.	4 years ago
Brad Fitzpatrick	8893c2ee78	net/interfaces, net/netns: move default route interface code to interfaces ... To populate interfaces.State.DefaultRouteInterface. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	fda9dc8815	net/netns: document Windows socket binding a bit more ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	963b927d5b	net/tshttpproxy: appease staticcheck	4 years ago
Brad Fitzpatrick	5bcac4eaac	net/tshttpproxy: add GetProxyForURL negative cache ... Otherwise when PAC server is down, we log, and each log entry is a new HTTP request (from logtail) and a new GetProxyForURL call, which again logs, non-stop. This is also nicer to the WinHTTP service. Then also hook up link change notifications to the cache to reset it if there's a chance the network might work sooner.	4 years ago
David Anderson	8f5b52e571	net/netns: add windows support. ... Also remove rebinding logic from the windows router. Magicsock will instead rebind based on link change signals. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	40e12c17ec	net/netcheck: remove mistaken double Mutex.Unlock in error path ... Thanks to @dotaheor for noticing. Fixes #751	4 years ago
Brad Fitzpatrick	f65eb4e5c1	net/netstat: start of new netstat package, with Windows for now ... This will be used in a future change to do localhost connection authentication. This lets us quickly map a localhost TCP connection to a PID. (A future change will then map a pid to a user) TODO: pull portlist's netstat code into this package. Then portlist will be fast on Windows without requiring shelling out to netstat.exe.	4 years ago
Brad Fitzpatrick	9c25968b63	net/tshttpproxy: fix typo in Windows code added at least second ... I ran tests & vet & staticcheck, but for Linux, not Windows. (#728 would be nice)	4 years ago
Brad Fitzpatrick	b026a638c7	net/tshttpproxy: if winhttp.GetProxyForURL blocks too long, use previous value ... We currently have a chickend-and-egg situation in some environments where we can set up routes that WinHTTP's WPAD/PAC resolution service needs to download the PAC file to evaluate GetProxyForURL, but the PAC file is behind a route for which we need to call GetProxyForURL to e.g. dial a DERP server. As a short-term fix, just assume that the most recently returned proxy is good enough for such situations.	4 years ago
Brad Fitzpatrick	74ee374667	net/tshttpproxy: add more winhttp logging ... Notably around duration of calls.	4 years ago
Brad Fitzpatrick	1e0be5a458	tshttp, derphttp: send Proxy-Authorization, not Authorization, to proxies ... Whoops. But weirdly, sending Authorization sometimes worked?	4 years ago
Brad Fitzpatrick	2bac125cad	net/tshttpproxy: move the TS_DEBUG_FAKE_PROXY_AUTH knob up a level	4 years ago
Brad Fitzpatrick	28f9cd06f5	tshttpproxy, controlclient, derphttp, logpolicy: send Negotiate auth to proxies ... For Windows only, and only when built with Tailscale's Go tree. Updates tailscale/corp#583	4 years ago
Brad Fitzpatrick	f915ab6552	net/tshttpproxy: add start of Kerberos Negotiate auth to proxies on Windows ... For now only used by a new cmd/tailscale debug --get-url subcommand. Not yet wired up to the places making HTTP requests. Updates tailscale/corp#583	4 years ago
renthraysk	10cad39abd	net/stun: Fix STUN attribute padding (#710) ... net/stun: fix STUN attribute padding Signed-off-by: RenThraysk <renthraysk@gmail.com>	4 years ago
Brad Fitzpatrick	9be1917c5b	net/tshttpproxy: discard secondary Windows proxies for now	4 years ago
Brad Fitzpatrick	1e562886f5	net/netcheck: in verbose mode, probe all regions ... So 'tailscale netcheck --verbose' shows all regions' latencies.	4 years ago
Brad Fitzpatrick	c5eb57f4d6	net/tshttpproxy: new package, support WPAD/PAC proxies on Windows ... Updates tailscale/corp#553 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	dbb4c246fa	wgengine/monitor: add Windows linkchange monitor ... Updates tailscale/corp#553 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	b97aac1718	net/interfaces: include DefaultRouteInterface in interfaces.State ... And log it in wgengine on change. Changing bug in #643. Updates #643	4 years ago
Josh Bleecher Snyder	a9b1e3f9e8	net/interfaces: remove old debug old ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	25b021388b	net/netns, net/interfaces: move defaultRouteInterface, add Android fallback ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	a16a793605	net/interfaces: use syscalls to find private gateway IP address ... iOS doesn't let you run subprocesses, which means we can't use netstat to get routing information. Instead, use syscalls and grub around in the results. We keep the old netstat version around, both for use in non-cgo builds, and for use testing the syscall-based version. Note that iOS doesn't ship route.h, so we include a copy here from the macOS 10.15 SDK (which is itself unchanged from the 10.14 SDK). I have tested manually that this yields the correct gateway IP address on my own macOS and iOS devices. More coverage would be most welcome. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	4 years ago
Dmytro Shynkevych	28e52a0492	all: dns refactor, add Proxied and PerDomain flags from control (#615) ... Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	4 years ago
Brad Fitzpatrick	c253d4f948	net/interfaces: don't try to fork on iOS in likelyHomeRouterIPDarwin ... No subprocesses allowed on iOS. Will need to do this differently later.	4 years ago
Brad Fitzpatrick	33a748bec1	net/interfaces: fix likelyHomeRouterIP on Android	4 years ago
David Anderson	a2b4ad839b	net/netcheck: lower the hairpin check timeout to 100ms. ... This single check is the long pole for netcheck, and significantly slows down magicsock tests. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	25288567ec	net/netcheck: centralize all clock values in one place. ... This makes it easier to see how long a netcheck might take, and what the slow bits might be. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	d60917c0f1	wgengine/router: switch packet marks to avoid conflict with Weave Net. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	10ac066013	all: fix vet warnings	4 years ago
Brad Fitzpatrick	723b9eecb0	net/interfaces: set SysProcAttr.HideWindow to prevent cmd.exe flash on Windows	4 years ago
Brad Fitzpatrick	6c74065053	wgengine/magicsock, tstest/natlab: start hooking up natlab to magicsock ... Also adds ephemeral port support to natlab. Work in progress. Pairing with @danderson.	4 years ago
Brad Fitzpatrick	ecf5d69c7c	net/netcheck: add missing comment asked for in earlier code review	4 years ago
Brad Fitzpatrick	742b8b44a8	net/tsaddr: new package to hold Tailscale-specific IPs/ranges ... And update existing callers with (near) duplicated cases.	4 years ago
Brad Fitzpatrick	5c6d8e3053	netcheck, tailcfg, interfaces, magicsock: survey UPnP, NAT-PMP, PCP ... Don't do anything with UPnP, NAT-PMP, PCP yet, but see how common they are in the wild. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	32156330a8	net/interfaces: add func LikelyHomeRouterIP ... For discovering where we might direct NAT-PMP/PCP/UPnP queries at in the future.	4 years ago
Brad Fitzpatrick	cf74e9039e	net/netcheck: add an informative payload in the netcheck UDP helper packets ... Per comment from @normanr: 0a5ab533c1 (r40401954) Updates #188	4 years ago
Brad Fitzpatrick	0a5ab533c1	net/netcheck: send dummy packet out to help airport extreme in hairpin check ... At least the Apple Airport Extreme doesn't allow hairpin sends from a private socket until it's seen traffic from that src IP:port to something else out on the internet. See https://github.com/tailscale/tailscale/issues/188#issuecomment-600728643 And it seems that even sending to a likely-filtered RFC 5737 documentation-only IPv4 range is enough to set up the mapping. So do that for now. In the future we might want to classify networks that do and don't require this separately. But for now help it. I've confirmed that this is enough to fix the hairpin check on Avery's home network, even using the RFC 5737 IP. Fixes #188	4 years ago
Brad Fitzpatrick	2d6e84e19e	net/netcheck, wgengine/magicsock: replace more UDPAddr with netaddr.IPPort	4 years ago
Quoc-Viet Nguyen	15a23ce65f	net/stun: Remove unreachable code ... - Reuse IP length constants from net package. - Remove beu16 to make endianness functions consistent. Signed-off-by: Quoc-Viet Nguyen <afelion@gmail.com>	5 years ago
Brad Fitzpatrick	deb113838e	net/netcheck: use logger.ArgWriter in logConciseReport, fix comma bug, add tests	5 years ago
Brad Fitzpatrick	24009241bf	net/netns: move SOCKS dialing to netns for now ... This lets control & logs also use SOCKS dials. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	cf0d19f0ab	net/tlsdial, derp/derphttp: finish DERPNode.CertName validation	5 years ago
Brad Fitzpatrick	a5d6c9d616	net/netns: optimize defaultRouteInterface a bit ... It'll be called a bunch, so worth a bit of effort. Could go further, but not yet. (really, should hook into wgengine/monitor and only re-read on netlink changes?) name old time/op new time/op delta DefaultRouteInterface-8 60.8µs ±11% 44.6µs ± 5% -26.65% (p=0.000 n=20+19) name old alloc/op new alloc/op delta DefaultRouteInterface-8 3.29kB ± 0% 0.55kB ± 0% -83.21% (p=0.000 n=20+20) name old allocs/op new allocs/op delta DefaultRouteInterface-8 9.00 ± 0% 6.00 ± 0% -33.33% (p=0.000 n=20+20)	5 years ago
Brad Fitzpatrick	becce82246	net/netns, misc tests: remove TestOnlySkipPrivilegedOps, argv checks ... The netns UID check is sufficient for now. We can do something else later if/when needed.	5 years ago
Brad Fitzpatrick	7a410f9236	net/netns: unindent, refactor to remove some redunant code ... Also: * always error on Control failing. That's very unexpected. * pull out sockopt funcs into their own funcs for easier future testing	5 years ago
Brad Fitzpatrick	45b139d338	net/netns: remove redundant build tag ... Filename is sufficient.	5 years ago
Brad Fitzpatrick	dcd7a118d3	net/netns: add a test that tailscaleBypassMark stays in sync between packages	5 years ago
Brad Fitzpatrick	1e837b8e81	net/netns: refactor the sync.Once usage a bit	5 years ago
Avery Pennarun	e7ae6a2e06	net/netns, wgengine/router: support Linux machines that don't have 'ip rule'. ... We'll use SO_BINDTODEVICE instead of fancy policy routing. This has some limitations: for example, we will route all traffic through the interface that has the main "default" (0.0.0.0/0) route, so machines that have multiple physical interfaces might have to go through DERP to get to some peers. But machines with multiple physical interfaces are very likely to have policy routing (ip rule) support anyway. So far, the only OS I know of that needs this feature is ChromeOS (crostini). Fixes #245. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Brad Fitzpatrick	765695eaa2	net/netns: also don't err on tailscaled -fake as a regular user ... That's one of my dev workflows.	5 years ago
Brad Fitzpatrick	7f68e097dd	net/netcheck: fix HTTPS fallback bug from earlier today ... My earlier 3fa58303d0 tried to implement the net/http.Tranhsport.DialTLSContext hook, but I didn't return a *tls.Conn, so we ended up sending a plaintext HTTP request to an HTTPS port. The response ended up being Go telling as such, not the /derp/latency-check handler's response (which is currently still a 404). But we didn't even get the 404. This happened to work well enough because Go's built-in error response was still a valid HTTP response that we can measure for timing purposes, but it's not a great answer. Notably, it means we wouldn't be able to get a future handler to run server-side and count those latency requests.	5 years ago
Brad Fitzpatrick	1407540b52	net/netns: don't return an error if we're not root and running the tailscale binary ... tailscale netcheck was broken otherwise. We can fix this a better way later; I'm just fixing a regression in some way because I'm trying to work on netcheck at the moment.	5 years ago
David Anderson	5114df415e	net/netns: set the bypass socket mark on linux. ... This allows tailscaled's own traffic to bypass Tailscale-managed routes, so that things like tailscale-provided default routes don't break tailscaled itself. Progress on #144. Signed-off-by: David Anderson <danderson@tailscale.com>	5 years ago
Brad Fitzpatrick	3fa58303d0	netcheck: address some HTTP fallback measurement TODOs	5 years ago
Brad Fitzpatrick	7247e896b5	net/netcheck: add Report.IPv4 and another TODO	5 years ago
David Anderson	e9f7d01b91	derp/derphttp: make DERP client use netns for dial-outs.	5 years ago
Brad Fitzpatrick	9e3ad4f79f	net/netns: add package for start of network namespace support ... And plumb in netcheck STUN packets. TODO: derphttp, logs, control. Updates #144 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	0245bbe97b	Make netcheck handle v6-only interfaces better, faster. ... Also: * add -verbose flag to cmd/tailscale netcheck * remove some API from the interfaces package * convert some of the interfaces package to netaddr.IP * don't even send IPv4 probes on machines with no IPv4 (or only v4 loopback) * and once three regions have replied, stop waiting for other probes at 2x the slowest duration. Updates #376	5 years ago
Avery Pennarun	7cd9ff3dde	net/netcheck: fix race condition initializting RegionLatency maps. ... Under some conditions, code would try to look things up in the maps before the first call to updateLatency. I don't see any reason to delay initialization of the maps, so let's just init them right away when creating the Report instance. Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>	5 years ago
Brad Fitzpatrick	b0c10fa610	stun, netcheck: move under net	5 years ago
David Anderson	657f331e8b	net/dnscache: remove unnecessary lint warning.	5 years ago
Elias Naur	ad0795efc2	net/dnscache: don't use the Go resolver on Android ... The local resolver is not available for apps on Android. Signed-off-by: Elias Naur <mail@eliasnaur.com>	5 years ago
Brad Fitzpatrick	2244cca5ff	net/tlsdial: update package doc to say it's now somewhat useless	5 years ago
Brad Fitzpatrick	172d72a060	Revert "net/tlsdial: add memory-optimized TLS cert verification path for iOS" ... This reverts commit 6fcbd4c4d4. Decided to put it in tailscale/go's crypto/x509 instead.	5 years ago
Brad Fitzpatrick	6fcbd4c4d4	net/tlsdial: add memory-optimized TLS cert verification path for iOS ... Behind a build tag for now.	5 years ago
Brad Fitzpatrick	b6fa5a69be	net/tlsdial: add package for TLS dials, and make DERP & controlclient use it ... This will do the iOS-optimized cert checking in a following change.	5 years ago
Brad Fitzpatrick	c0697e1feb	net/interfaces: add IsExpensive and up state to State ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	a4ef345737	cmd/tailscale: add status subcommand ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
David Anderson	315a5e5355	scripts: add a license header checker. ... Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
David Crawshaw	41ac4a79d6	net/nettest: new package with net-like testing primitives ... This is a lot like wiring up a local UDP socket, read and write deadlines work. The big difference is the Block feature, which lets you stop the packet flow without breaking the connection. This lets you emulate broken sockets and test timeouts actually work. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	5 years ago
Brad Fitzpatrick	023df9239e	Move linkstate boring change filtering to magicsock ... So we can at least re-STUN on boring updates. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	5c1e443d34	wgengine/monitor: don't call LinkChange when interfaces look unchanged ... Basically, don't trust the OS-level link monitor to only tell you interesting things. Sanity check it. Also, move the interfaces package into the net directory now that we have it.	5 years ago
Brad Fitzpatrick	bd0e20f351	net/dnscache: ignore annoying staticcheck check	5 years ago
Brad Fitzpatrick	d44325295e	net/dnscache: initialize the single Resolver more directly	5 years ago
David Crawshaw	cac68fe102	net/dnscache: do not PreferGo on macOS/iOS ... With this commit my iPhone can now DERP.	5 years ago
Brad Fitzpatrick	8f0fd01efd	net/dnscache: add copyright header to test	5 years ago
David Crawshaw	5a1ce4adae	net/dnscache: parse passed CIDR ... Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	5 years ago
Brad Fitzpatrick	2cff9016e4	net/dnscache: add overly simplistic DNS cache package for selective use ... I started to write a full DNS caching resolver and I realized it was overkill and wouldn't work on Windows even in Go 1.14 yet, so I'm doing this tiny one instead for now, just for all our netcheck STUN derp lookups, and connections to DERP servers. (This will be caching a exactly 8 DNS entries, all ours.) Fixes #145 (can be better later, of course)	5 years ago