If we accept a forwarded TCP connection before dialing, we can
erroneously signal to a client that we support IPv6 (or IPv4) without
that actually being possible. Instead, we only complete the client's TCP
handshake after we've dialed the outbound connection; if that fails, we
respond with a RST.
Updates #5425 (maybe fixes!)
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
Allows imports of the NPM package added by 1a093ef482
to be replaced with import("http://localhost:9090/pkg/pkg.js"), so that
changes can be made in parallel to both the module and code that uses
it (without any need for NPM publishing or even building of the package).
Updates #5415
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
Incoming disco packets are now dropped unless they match one of the
current bound ports, or have a zero port*.
The BPF filter passes all packets with a disco header to the raw packet
sockets regardless of destination port (in order to avoid needing to
reconfigure BPF on rebind).
If a BPF enabled node has just rebound, due to restart or rebind, it may
receive and reply to disco ping packets destined for ports other than
those which are presently bound. If the pong is accepted, the pinging
node will now assume that it can send WireGuard traffic to the pinged
port - such traffic will not reach the node as it is not destined for a
bound port.
*The zero port is ignored, if received. This is a speculative defense
and would indicate a problem in the receive path, or the BPF filter.
This condition is allowed to pass as it may enable traffic to flow,
however it will also enable problems with the same symptoms this patch
otherwise fixes.
Fixes#5536
Signed-off-by: James Tucker <james@tailscale.com>
1f959edeb0 introduced a regression for JS
where the initial bind no longer occurred at all for JS.
The condition is moved deeper in the call tree to avoid proliferation of
higher level conditions.
Updates #5537
Signed-off-by: James Tucker <james@tailscale.com>
Both RebindingUDPConns now always exist. the initial bind (which now
just calls rebind) now ensures that bind is called for both, such that
they both at least contain a blockForeverConn. Calling code no longer
needs to assert their state.
Signed-off-by: James Tucker <james@tailscale.com>
This is especially helpful as we launch newer DERPs over time, and older
clients have progressively out-of-date static DERP maps baked in. After
this, as long as the client has successfully connected once, it'll cache
the most recent DERP map it knows about.
Resolves an in-code comment from @bradfitz
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
It was previously using jobcontrol to achieve this, but that apparently
doesn't work when there is no tty. This makes it so that it directly
handles SIGINT and SIGTERM and passes it on to tailscaled. I tested this
works on a Digital Ocean K8s cluster.
Fixes#5512
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Allow callers to verify that a net.Listener is a tsnet.listener by type
asserting against this Server method, as well as providing access to the
underlying Server.
This is initially being added to support the caddy integration in
caddyserver/caddy#5002.
Signed-off-by: Will Norris <will@tailscale.com>
Apparently the validate route doesn't check content-types or handle
hujson with comments correctly. This patch makes gitops-pusher convert
the hujson to normal json.
Signed-off-by: Xe <xe@tailscale.com>
Signed-off-by: Xe <xe@tailscale.com>
With MagicDNS GA, we are giving every tailnet a tailnet-<hex>.ts.net name.
We will only parse out if legacy domains include beta.tailscale.net; otherwise,
set tailnet to the full domain format going forward.
Signed-off-by: nyghtowl <warrick@tailscale.com>
This is entirely optional (i.e. failing in this code is non-fatal) and
only enabled on Linux for now. Additionally, this new behaviour can be
disabled by setting the TS_DEBUG_DISABLE_AF_PACKET environment variable.
Updates #3824
Replaces #5474
Co-authored-by: Andrew Dunham <andrew@du.nham.ca>
Signed-off-by: David Anderson <danderson@tailscale.com>
This will be needed to support preauth-keys with network lock in the future,
so getting the core mechanics out of the way now.
Signed-off-by: Tom DNetto <tom@tailscale.com>
If ExtraRecords (Hosts) are specified without a corresponding split
DNS route and global DNS is specified, then program the host OS DNS to
use 100.100.100.100 so it can blend in those ExtraRecords.
Updates #1543
Change-Id: If49014a5ecc8e38978ff26e54d1f74fe8dbbb9bc
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We were just outputting them to the terminal, but that's hard to debug
because we immediately tear down the terminal when getting an error.
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This makes a "modified externally" error turn into a "modified externally" warning. It means CI won't fail if someone does something manually in the admin console.
Signed-off-by: Xe <xe@tailscale.com>
The next time we update the toolchain, all of the CI
Actions will automatically use it when go.mod is updated.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
It is unclear whether the lack of checking nil-ness of slices
was an oversight or a deliberate feature.
Lacking a comment, the assumption is that this was an oversight.
Also, expand the logic to perform cycle detection for recursive slices.
We do this on a per-element basis since a slice is semantically
equivalent to a list of pointers.
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Adds an on-demand GitHub Action that publishes the package to the npm
registry (currently under tailscale-connect, will be moved to
@tailscale/connect once we get control of the npm org).
Makes the package.json for the NPM package be dynamically generated to
have the current Tailscale client version.
Updates #5415
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
On sufficiently large tailnets, even writing the peer header (~95 bytes)
can result in a large amount of data that needs to be serialized and
deserialized. Only write headers for peers that need to have their
configuration changed.
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
Avoid contention from fetching status for all peers, and instead fetch
status for a single peer.
Updates tailscale/coral#72
Signed-off-by: James Tucker <james@tailscale.com>
Somehow I accidentally set the wrong registry value here.
It should be DisableDynamicUpdate=1 and not EnableDNSUpdate=0.
This is a regression from 545639e.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
This lets the control plane can make HTTP requests to nodes.
Then we can use this for future things rather than slapping more stuff
into MapResponse, etc.
Change-Id: Ic802078c50d33653ae1f79d1e5257e7ade4408fd
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
