Commit Graph

198 Commits

Author SHA1 Message Date
cthuang bad2e8e812 TUN-6666: Define packet package
This package defines IP and ICMP packet, decoders, encoder and flow
2022-08-24 11:36:57 +01:00
João Oliveirinha 20ed7557f9 TUN-6679: Allow client side of quic request to close body
In a previous commit, we fixed a bug where the client roundtrip code
could close the request body, which in fact would be the quic.Stream,
thus closing the write-side.
The way that was fixed, prevented the client roundtrip code from closing
also read-side (the body).

This fixes that, by allowing close to only close the read side, which
will guarantee that any subsquent will fail with an error or EOF it
occurred before the close.
2022-08-23 10:43:45 +01:00
Devin Carr a97673e8b9 TUN-6575: Consume cf-trace-id from incoming http2 TCP requests 2022-08-16 15:30:44 +00:00
Sudarsan Reddy 99f39225f1 TUN-6617: Dont fallback to http2 if QUIC conn was successful.
cloudflared falls back aggressively to HTTP/2 protocol if a connection
attempt with QUIC failed. This was done to ensure that machines with UDP
egress disabled did not stop clients from connecting to the cloudlfare
edge. This PR improves on that experience by having cloudflared remember
if a QUIC connection was successful which implies UDP egress works. In
this case, cloudflared does not fallback to HTTP/2 and keeps trying to
connect to the edge with QUIC.
2022-08-12 08:40:03 +00:00
cthuang 278df5478a TUN-6584: Define QUIC datagram v2 format to support proxying IP packets 2022-08-12 08:06:56 +00:00
Sudarsan Reddy d3fd581b7b Revert "TUN-6617: Dont fallback to http2 if QUIC conn was successful."
This reverts commit 679a89c7df.
2022-08-11 20:27:22 +01:00
Sudarsan Reddy 679a89c7df TUN-6617: Dont fallback to http2 if QUIC conn was successful.
cloudflared falls back aggressively to HTTP/2 protocol if a connection
attempt with QUIC failed. This was done to ensure that machines with UDP
egress disabled did not stop clients from connecting to the cloudlfare
edge. This PR improves on that experience by having cloudflared remember
if a QUIC connection was successful which implies UDP egress works. In
this case, cloudflared does not fallback to HTTP/2 and keeps trying to
connect to the edge with QUIC.
2022-08-11 17:55:10 +00:00
Sudarsan Reddy 065d8355c5 TUN-6637: Upgrade quic-go 2022-08-10 14:13:19 +00:00
João Oliveirinha 4016334efc TUN-6642: Fix unexpected close of quic stream triggered by upstream origin close
This commit guarantees that stream is only closed once the are finished
handling the stream. Without it, we were seeing closes being triggered
by the code that proxies to the origin, which was resulting in failures
to actually send downstream the status code of the proxy request to the
eyeball.

This was then subsequently triggering unexpected retries to cloudflared
in situations such as cloudflared being unable to reach the origin.
2022-08-10 09:50:27 +01:00
Devin Carr b9cba7f2ae TUN-6576: Consume cf-trace-id from incoming TCP requests to create root span
(cherry picked from commit f48a7cd3dd)
2022-08-02 14:56:31 -07:00
João Oliveirinha 7f1c890a82 Revert "TUN-6576: Consume cf-trace-id from incoming TCP requests to create root span"
This reverts commit f48a7cd3dd.
2022-08-02 11:13:24 +01:00
Devin Carr f48a7cd3dd TUN-6576: Consume cf-trace-id from incoming TCP requests to create root span 2022-08-01 20:22:39 +00:00
Devin Carr 2a177e0fc4 TUN-6583: Remove legacy --ui flag 2022-07-20 16:17:29 -07:00
Igor Postelnik 1733fe8c65 TUN-6517: Use QUIC stream context while proxying HTTP requests and TCP connections 2022-07-07 18:06:57 -05:00
Devin Carr b849def673 TUN-6460: Rename metric label location to edge_location
For Google's managed prometheus, it seems they reserved certain
labels for their internal service regions/locations. This causes
customers to run into issues using our metrics since our
metric: `cloudflared_tunnel_server_locations` has a `location`
label. Renaming this to `edge_location` should unblock the
conflict and usage.
2022-06-24 09:46:22 -07:00
Devin Carr dd540af695 TUN-6388: Fix first tunnel connection not retrying 2022-06-23 16:55:03 +00:00
Devin Carr c7a6304d32 TUN-6007: Implement new edge discovery algorithm
(cherry picked from commit 4f468b8a5d)
2022-06-23 16:55:03 +00:00
Igor Postelnik 3da1c25471 TUN-6381: Write error data on QUIC stream when we fail to talk to the origin; separate logging for protocol errors vs. origin errors. 2022-06-15 13:06:45 +00:00
Devin Carr 1d79831651 Revert "TUN-6007: Implement new edge discovery algorithm"
This reverts commit 4f468b8a5d.
2022-06-14 16:08:03 -07:00
Igor Postelnik e8407848ec TUN-6385: Don't share err between acceptStream loop and per-stream goroutines 2022-06-13 18:24:00 -05:00
Sudarsan Reddy 69b28e358c TUN-6347: Add TCP stream logs with FlowID 2022-06-09 19:41:20 +00:00
Devin Carr 4f468b8a5d TUN-6007: Implement new edge discovery algorithm 2022-06-08 21:09:45 +00:00
Nuno Diegues 475939a77f TUN-6191: Update quic-go to v0.27.1 and with custom patch to allow keep alive period to be configurable
The idle period is set to 5sec.

We now also ping every second since last activity.
This makes the quic.Connection less prone to being closed with
no network activity, since we send multiple pings per idle
period, and thus a single packet loss cannot cause the problem.
2022-06-07 12:25:18 +01:00
Nuno Diegues 4ccef23dbc TUN-6343: Fix QUIC->HTTP2 fallback 2022-06-03 10:15:52 +01:00
Devin Carr ee80e55833 TUN-6339: Add config for IPv6 support 2022-06-02 16:04:26 -07:00
cthuang baed5f4eea TUN-6308: Add debug logs to see if packets are sent/received from edge 2022-05-30 14:01:40 +01:00
João Oliveirinha 99d4e48656 TUN-6016: Push local managed tunnels configuration to the edge 2022-05-06 15:43:24 +00:00
Devin Carr f81b0ee9e8 TUN-5990: Add otlp span export to response header 2022-04-18 16:25:56 +00:00
Devin Carr def8f57dbc TUN-5989: Add in-memory otlp exporter 2022-04-11 19:38:01 +00:00
Nuno Diegues a0f6eb9d5e TUN-5992: Use QUIC protocol for remotely managed tunnels when protocol is unspecified 2022-04-05 23:07:10 +01:00
Nuno Diegues 98736a03e1 TUN-5915: New cloudflared command to allow to retrieve the token credentials for a Tunnel 2022-03-23 10:35:16 +00:00
cthuang eee0d57ed0 TUN-5849: Remove configuration debug log 2022-03-08 11:03:46 +00:00
Nuno Diegues 3aebaaad01 TUN-5836: QUIC transport no longer sets body to nil in any condition
Setting the body to nil was rendering cloudflared to crashing with
a SIGSEGV in the odd case where the hostname accessed maps to a
TCP origin (e.g. SSH/RDP/...) but the eyeball sends a plain HTTP
request that does not go through cloudflared access (thus not wrapped
in websocket as it should).

Instead, QUIC transport now sets http.noBody in that condition, which
deals with the situation gracefully.
2022-03-07 11:39:07 +00:00
Sudarsan Reddy 5c6207debc TUN-5696: HTTP/2 Configuration Update 2022-03-04 12:28:55 +00:00
Nuno Diegues 7220c2c214 TUN-5837: Log panic recovery in http2 logic with debug level log 2022-03-04 11:52:45 +00:00
João Oliveirinha b6d7076400 TUN-5681: Add support for running tunnel using Token 2022-02-23 10:09:45 +00:00
João Oliveirinha 22cd8ceb8c TUN-5682: Remove name field from credentials 2022-02-23 10:08:29 +00:00
cthuang e56c4532ce TUN-5697: Listen for UpdateConfiguration RPC in quic transport 2022-02-18 09:12:39 +00:00
cthuang d68ff390ca TUN-5698: Make ingress rules and warp routing dynamically configurable 2022-02-16 09:38:28 +00:00
cthuang e22422aafb TUN-5749: Refactor cloudflared to pave way for reconfigurable ingress
- Split origin into supervisor and proxy packages
- Create configManager to handle dynamic config
2022-02-14 15:37:09 +00:00
cthuang db01127191 TUN-5184: Make sure outstanding websocket write is finished, and no more writes after shutdown 2022-02-10 09:43:52 +00:00
cthuang d07d24e5a2 TUN-5695: Define RPC method to update configuration 2022-02-03 15:05:46 +00:00
Nuno Diegues ed2bac026d TUN-5621: Correctly manage QUIC stream closing
Until this PR, we were naively closing the quic.Stream whenever
the callstack for handling the request (HTTP or TCP) finished.
However, our proxy handler may still be reading or writing from
the quic.Stream at that point, because we return the callstack if
either side finishes, but not necessarily both.

This is a problem for quic-go library because quic.Stream#Close
cannot be called concurrently with quic.Stream#Write

Furthermore, we also noticed that quic.Stream#Close does nothing
to do receiving stream (since, underneath, quic.Stream has 2 streams,
1 for each direction), thus leaking memory, as explained in:
https://github.com/lucas-clemente/quic-go/issues/3322

This PR addresses both problems by wrapping the quic.Stream that
is passed down to the proxying logic and handle all these concerns.
2022-02-01 22:01:57 +00:00
cthuang 6fa58aadba TUN-5623: Configure quic max datagram frame size to 1350 bytes for none Windows platforms 2022-01-11 14:55:43 +00:00
Nuno Diegues 1086d5ede5 TUN-5204: Unregister QUIC transports on disconnect
This adds various bug fixes when investigating why QUIC transports were
not being unregistered when they should (and only when the graceful shutdown
started).

Most of these bug fixes are making the QUIC transport implementation closer
to its HTTP2 counterpart:
 - ServeControlStream is now a blocking function (it's up to the transport to handle that)
 - QUIC transport then handles the control plane as part of its Serve, thus waiting for it on shutdown
 - QUIC transport now returns "non recoverable" for connections with similar semantics to HTTP2 and H2mux
 - QUIC transport no longer has a loop around its Serve logic that retries connections on its own (that logic is upstream)
2022-01-06 10:08:38 +00:00
Nuno Diegues c314d58b69 TUN-5616: Never fallback transport if user chooses it on purpose 2022-01-06 09:20:59 +00:00
Nuno Diegues 628545d229 TUN-5600: Close QUIC transports as soon as possible while respecting graceful shutdown
This does a few fixes to make sure that the QUICConnection returns from
Serve when the context is cancelled.

QUIC transport now behaves like other transports: closes as soon as there
is no traffic, or at most by grace-period. Note that we do not wait for
UDP traffic since that's connectionless by design.
2022-01-06 08:59:53 +00:00
cthuang 74a3026963 TUN-5597: Log session ID when session is terminated by edge 2021-12-23 11:43:23 +00:00
cthuang 7a55208c61 TUN-5590: QUIC datagram max user payload is 1217 bytes 2021-12-22 19:53:58 +00:00
cthuang ebae7a7024 TUN-5494: Send a RPC with terminate reason to edge if the session is closed locally 2021-12-21 09:52:39 +00:00
cthuang 73a265f2fc TUN-5488: Close session after it's idle for a period defined by registerUdpSession RPC 2021-12-09 11:55:34 +00:00
cthuang b73c588254 TUN-5422: Define RPC to unregister session 2021-12-06 16:37:09 +00:00
João Oliveirinha 7e47667b08 TUN-5481: Create abstraction for Origin UDP Connection
Creates an abstraction over UDP Conn for origin "connection" which can
be useful for future support of complex protocols that may require
changing ports during protocol negotiation (eg. SIP, TFTP)
In addition, it removes a dependency from ingress on connection package.
2021-12-06 16:37:09 +00:00
cthuang eea3d11e40 TUN-5301: Separate datagram multiplex and session management logic from quic connection logic 2021-12-06 16:37:09 +00:00
cthuang dd32dc1364 TUN-5299: Send/receive QUIC datagram from edge and proxy to origin as UDP 2021-12-06 16:37:09 +00:00
cthuang fc2333c934 TUN-5300: Define RPC to register UDP sessions 2021-12-06 16:37:09 +00:00
Nuno Diegues 6cc7d99e32 TUN-5441: Fix message about available protocols 2021-11-18 14:30:22 +00:00
Nuno Diegues e35f744b36 TUN-5393: Content-length is no longer a control header for non-h2mux transports
- Refactors some h2mux specific logic from connection/header.go to connection/h2mux_header.go
 - Do the same for the unit tests
 - Add a non-h2mux "is control response header" function (we don't need one for the request flow)
 - In that new function, do not consider "content-length" as a control header
 - Use that function in the non-h2mux flow for response (and it will be used also in origintunneld)
2021-11-17 10:56:15 +00:00
Dimitris Apostolou 197a70c9c4
Fix typos 2021-11-12 17:38:06 +02:00
Sudarsan Reddy 0146a8d8ed TUN-5285: Fallback to HTTP2 immediately if connection times out with no network activity 2021-11-04 10:42:53 +00:00
Nuno Diegues 573d410606 Revert "TUN-5184: Make sure outstanding websocket write is finished, and no more writes after shutdown"
This reverts commit f8fbbcd806.
2021-10-25 19:51:52 +01:00
cthuang f8fbbcd806 TUN-5184: Make sure outstanding websocket write is finished, and no more writes after shutdown 2021-10-25 08:27:40 +00:00
cthuang 2ce11a20c4 TUN-5287: Fix misuse of wait group in TestQUICServer that caused the test to exit immediately 2021-10-22 13:40:51 +00:00
Sudarsan Reddy ceb509ee98 TUN-5138: Switch to QUIC on auto protocol based on threshold 2021-10-14 09:18:20 +01:00
Sudarsan Reddy 2822fbe3db TUN-5249: Revert "TUN-5138: Switch to QUIC on auto protocol based on threshold"
This reverts commit e445fd92f7
2021-10-13 19:06:31 +01:00
Sudarsan Reddy e445fd92f7 TUN-5138: Switch to QUIC on auto protocol based on threshold 2021-10-11 11:05:20 +00:00
Sudarsan Reddy bccf4a63dc UN-5213: Increase MaxStreams value for QUIC transport
The default max streams value of 100 is rather small when subject to
high load in terms of connecting QUIC with streams faster than it can
create new ones. This high value allows for more throughput.
2021-10-08 13:48:20 +01:00
Sudarsan Reddy 7059ef8e13 TUN-5195: Do not set empty body if not applicable
Go's client defaults to chunked encoding after a 200ms delay if the following cases are true:
  * the request body blocks
  * the content length is not set (or set to -1)
  * the method doesn't usually have a body (GET, HEAD, DELETE, ...)
  * there is no transfer-encoding=chunked already set.
So for non websocket requests, if transfer-encoding isn't chunked and content length is 0, we dont set a request body.
2021-10-07 15:47:27 +01:00
Sudarsan Reddy 470a85e65d TUN-5160: Set request.ContentLength when this value is in request header 2021-09-27 14:12:11 +01:00
Sudarsan Reddy d7da74cb9e TUN-5142: defer close rpcconn inside unregister instead of ServeControlStream 2021-09-24 12:56:31 +01:00
Sudarsan Reddy 27e1277a3b TUN-5142: Add asynchronous servecontrolstream for QUIC
ServeControlStream accidentally became non-blocking in the last quic
change causing stream to not be returned until a SIGTERM was received.
This change makes ServeControlStream be non-blocking for QUIC streams.
2021-09-24 10:00:43 +00:00
cthuang 6238fd9022 TUN-5141: Make sure websocket pinger returns before streaming returns 2021-09-23 16:54:55 +01:00
Nuno Diegues f985ed567f TUN-5128: Enforce maximum grace period
This maximum grace period will be honored by Cloudflare edge such that
either side will close the connection after unregistration at most
by this time (3min as of this commit):
 - If the connection is unused, it is already closed as soon as possible.
 - If the connection is still used, it is closed on the cloudflared configured grace-period.

Even if cloudflared does not close the connection by the grace-period time,
the edge will do so.
2021-09-21 16:48:37 +00:00
Sudarsan Reddy fd14bf440b TUN-5118: Quic connection now detects duplicate connections similar to http2 2021-09-21 06:30:09 +00:00
Areg Harutyunyan d04f48d872
TUN-5029: Do not strip cf- prefixed headers 2021-09-02 12:21:01 -05:00
Rishabh Bector a4a9f45b0a TUN-4821: Make quick tunnels the default in cloudflared 2021-08-26 15:53:02 +00:00
Sudarsan Reddy 1da4fbbe0b TUN-4970: Only default to http2 for warp-routing if protocol is h2mux 2021-08-26 15:12:31 +00:00
Sudarsan Reddy b6c85401a5 TUN-4889: Add back appendtagheaders function
TUN-4701 accidentally removed adding tagheaders. This commit adds it
back.
2021-08-23 15:29:48 +00:00
Sudarsan Reddy 12ad264eb3 TUN-4866: Add Control Stream for QUIC
This commit adds support to Register and Unregister Connections via RPC
on the QUIC transport protocol
2021-08-17 14:50:32 +00:00
Sudarsan Reddy e49a7a4389 TUN-4597: Added HTTPProxy for QUIC 2021-08-04 12:50:18 +00:00
Sudarsan Reddy ed024d0741 TUN-4597: Add a QUIC server skeleton
- Added a QUIC server to accept streams
- Unit test for this server also tests ALPN
- Temporary echo capability for HTTP ConnectionType
2021-08-03 10:03:47 +00:00
Nuno Diegues fa8aa02270 TUN-4819: Tolerate protocol TXT record lookup failing 2021-07-29 11:44:39 +00:00
Nuno Diegues 0924549efd TUN-4811: Publish quick tunnels' hostname in /metrics under `userHostname` for backwards-compatibility 2021-07-29 10:20:43 +01:00
Sudarsan Reddy ed1389ef08 TUN-4814: Revert "TUN-4699: Make quick tunnels the default in cloudflared"
This reverts commit 18992efa0c.
2021-07-28 10:02:55 +01:00
Rishabh Bector 18992efa0c TUN-4699: Make quick tunnels the default in cloudflared 2021-07-26 15:57:36 +00:00
Sudarsan Reddy 8f3526289a TUN-4701: Split Proxy into ProxyHTTP and ProxyTCP
http.Request now is only used by ProxyHTTP and not required if the
proxying is TCP. The dest conversion is handled by the transport layer.
2021-07-19 13:43:59 +00:00
Rishabh Bector 3eb9efd9f0 TUN-4521: Modify cloudflared to use zoneless-tunnels-worker for free tunnels 2021-06-29 09:39:18 +01:00
Nuno Diegues b06fe0fc5f TUN-4571: Fix proxying to unix sockets when using HTTP2 transport to Cloudflare Edge 2021-06-21 11:43:14 +01:00
Sudarsan Reddy 951d13d76c TUN-4456: Replaced instances of Tick() with Ticker() in h2mux paths
time.Tick() does not get garbage collected because the channel
underneath never gets deleted and the underlying Ticker can never be
recovered by the garbage collector. We replace this with NewTicker() to
avoid this.
2021-05-25 18:07:06 +01:00
Igor Postelnik 8ca0d86c85 TUN-3863: Consolidate header handling logic in the connection package; move headers definitions from h2mux to packages that manage them; cleanup header conversions
All header transformation code from h2mux has been consolidated in the connection package since it's used by both h2mux and http2 logic.
Exported headers used by proxying between edge and cloudflared so then can be shared by tunnel service on the edge.
Moved access-related headers to corresponding packages that have the code that sets/uses these headers.
Removed tunnel hostname tracking from h2mux since it wasn't used by anything. We will continue to set the tunnel hostname header from the edge for backward compatibilty, but it's no longer used by cloudflared.
Move bastion-related logic into carrier package, untangled dependencies between carrier, origin, and websocket packages.
2021-03-29 21:57:56 +00:00
Igor Postelnik da4d0b2bae TUN-4067: Reformat code for consistent import order, grouping, and fix formatting. Added goimports target to the Makefile to make this easier in the future. 2021-03-24 10:53:29 -05:00
Nuno Diegues 89b738f8fa TUN-4026: Fix regression where HTTP2 edge transport was no longer propagating control plane errors 2021-03-04 18:45:39 +00:00
Sudarsan Reddy e20c4f8752 TUN-3838: ResponseWriter no longer reads and origin error tests 2021-02-23 14:19:47 +00:00
cthuang ab4dda5427 TUN-3868: Refactor singleTCPService and bridgeService to tcpOverWSService and rawTCPService 2021-02-23 14:19:47 +00:00
cthuang 2146f71b45 TUN-3753: Select http2 protocol when warp routing is enabled 2021-02-23 14:19:47 +00:00
cthuang 3b93914612 TUN-3764: Actively flush data for TCP streams 2021-02-23 14:19:47 +00:00
Sudarsan Reddy 368066a966 TUN-3615: added support to proxy tcp streams
added ingress.DefaultStreamHandler and a basic test for tcp stream proxy
moved websocket.Stream to ingress
cloudflared no longer picks tcpstream host from header
2021-02-23 14:19:47 +00:00
cthuang e2262085e5 TUN-3617: Separate service from client, and implement different client for http vs. tcp origins
- extracted ResponseWriter from proxyConnection
 - added bastion tests over websocket
 - removed HTTPResp()
 - added some docstrings
 - Renamed some ingress clients as proxies
 - renamed instances of client to proxy in connection and origin
 - Stream no longer takes a context and logger.Service
2021-02-23 14:19:44 +00:00
Igor Postelnik cf562ef8c8 TUN-3635: Send event when unregistering tunnel for gracful shutdown so /ready endpoint reports down status befoe connections finish handling pending requests. 2021-02-08 15:38:42 +00:00
Igor Postelnik 0b16a473da TUN-3869: Improve reliability of graceful shutdown.
- Don't rely on edge to close connection on graceful shutdown in h2mux, start muxer shutdown from cloudflared.
- Don't retry failed connections after graceful shutdown has started.
- After graceful shutdown channel is closed we stop waiting for retry timer and don't try to restart tunnel loop.
- Use readonly channel for graceful shutdown in functions that only consume the signal
2021-02-08 14:30:32 +00:00