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License: MIT License
Pion TURN, an API for building TURN clients and servers
License: MIT License
CI reported build error (log shown below)
Build and tests to pass
=== RUN TestServer/simple
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x68771e]
goroutine 32 [running]:
time.(*Timer).Stop(...)
/home/travis/.gimme/versions/go1.12.7.linux.amd64/src/time/sleep.go:74
github.com/pion/turn/internal/client.(*Transaction).StopRtxTimer(0xc0001dc070)
/home/travis/gopath/src/github.com/pion/turn/internal/client/transaction.go:75 +0xbe
github.com/pion/turn.(*Client).handleSTUNMessage(0xc0001b0240, 0xc0001fc000, 0x28, 0xffff, 0x998060, 0xc00020e000, 0xc00020e000, 0x0)
/home/travis/gopath/src/github.com/pion/turn/client.go:474 +0x99c
github.com/pion/turn.(*Client).HandleInbound(0xc0001b0240, 0xc0001fc000, 0x28, 0xffff, 0x998060, 0xc00020e000, 0xc00020e000, 0x0, 0x0)
/home/travis/gopath/src/github.com/pion/turn/client.go:400 +0x63c
github.com/pion/turn.(*Client).Listen.func1(0xc0001b0240)
/home/travis/gopath/src/github.com/pion/turn/client.go:173 +0x18d
created by github.com/pion/turn.(*Client).Listen
/home/travis/gopath/src/github.com/pion/turn/client.go:164 +0x1e1
FAIL github.com/pion/turn 1.390s
This never happens on my PC, but I found a typo in the code. The nil check was done against a wrong variable:
// StopRtxTimer stop the transaction timer
func (t *Transaction) StopRtxTimer() {
t.mutex.Lock()
defer t.mutex.Unlock()
if t != nil { // <----------------- :( this should be t.time
t.timer.Stop()
}
}
The pion/turn is a library, not the application, as @Sean-Der intended. We should move simple-turn and client applications into 'examples' folder.
Also, I believe we should consider removing client API (and cmd/client also), and use pion/turnc instead.
assume that We have 4 entities:
a). TURN Server (T): listening on public IP
b). TURN Client (C): somebody behind NAT that wants to connect other peer
c). Peer (P): somebody behind NAT that wants to talk with C
d). Signaling Server(S): intermediate server which helps connection setup between C and P
The process is like follows:
The issue happens in #4 in case of Symmetric NAT that P should send BindRequest to RELAYED ADDRESS, but rfc5766 and pion/turn's implementation explicitly says that only UDP datagram allowed between T and P, how does it work?
Thanks in advance
The RFC section of the README:
https://github.com/pions/turn#implemented
says that:
RFC 5389: Session Traversal Utilities for NAT (STUN)
Does this imply this can be used as a STUN server as well?
Not saying any other mention of STUN usage in the docs.
Do we provide an HTTP endpoint so people can see the status of allocations?
This can store the temporary users in the go process or use a cache like redis. This would prevent abuse of the TURN bandwidth if user/pass leak
We moved the stun package from pkg/stun
to stun
. This change has to be reflected in this library.
How to use pion in window server?
I need to install GO ?
Hello, thanks for the nice alternative.
Can Pion TURN work with SSL?
Any contributions around performance improvements are welcome! The server wasn't written with performance in mind (most attention was on RFC adherence and code quality)
Running the ice test in topic_vnet branch
PIONS_LOG_TRACE=all go test -v -run TestConnectivityVNet/Symmetric_NATs
ChannelBindRequest completes successfully.
I am seeing this error:
Failed to Create ChannelBind for udp4:28.1.1.1: unexpected response type Binding success response
This bug has been introduced since we removed ipv4.FlagDst.
Turn protocol listen ports are now using "specified" IP addresses, but relay ports have not been taken care of.
Obviously, if listen addr is 0.0.0.0, permission search would fail because the permission hash is based on "specified" (non-any-addr) address.
Permission check was always failing because the IP address did not match the incoming packets source IP.
Fixes are incoming!
panic: runtime error: index out of range
goroutine 1 [running]:
encoding/binary.bigEndian.Uint16(...)
/usr/local/go-d2c7dec183f0da628abf16848e9e92987feebe32/src/encoding/binary/binary.go:100
github.com/pions/pkg/stun.getChannelLength(...)
/go/src/github.com/pions/pkg/stun/channel_data.go:40
github.com/pions/pkg/stun.NewChannelData(0xc000012600, 0x2, 0x5dc, 0x1, 0x0, 0x0)
/go/src/github.com/pions/pkg/stun/channel_data.go:23 +0x161
github.com/pions/turn/internal/server.(*Server).handleUDPPacket(0xc000056100, 0xc00000c1c0, 0xc00000c1e0, 0xc000012600, 0x5dc, 0x5dc, 0x2, 0xc00006c870, 0x0)
/go/src/github.com/pions/turn/internal/server/server.go:76 +0xc0
github.com/pions/turn/internal/server.(*Server).Listen(0xc000056100, 0x5670ad, 0x7, 0xd96, 0x5dc, 0x5dc)
/go/src/github.com/pions/turn/internal/server/server.go:65 +0x2e3
github.com/pions/turn.Start(0x582220, 0x6506e8, 0xc00001a0e6, 0x11, 0xd96)
/go/src/github.com/pions/turn/turn.go:24 +0x178
main.main()
/go/src/github.com/pions/turn/cmd/simple-turn/main.go:48 +0x2ec
I was testing if the port is opened and crashed the TURN server. Oops. Very easy to repro
Start the server, in a different shell run:
echo a | nc -u localhost 3478
Server gracefully handling malformed packets.
Server crashed, see stacktrace above.
getting this error in the log "Packet unhandled in relay src "
Can any one help me why is this coming.
its in nohup.out
Can not run direct version AMD64. there have not params like USERS.
Maybe config file is better?
Currently we only support UDP clients
If this blocks you from using pion-turn please comment, and we can escalate
Currently this is hard-coded and should be specifiable either through configuration or environment variables.
Allow user to specify external IP, use this instead of DstAddr when provided
A simple TURN/STUN client would be great for testing, currently there isn't a nice portable tool to assert that both are working (most people suggest https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/)
Part of merging process
From the rfc https://tools.ietf.org/html/rfc5766#section-2.3, it should only include the IP address and lifetime.
how to install turn server with powershell (windows server2012)
thank a lot i think
Refresh allocation with 0 second lifetime
The allocation
doesn't remove from the manager as expected.
Not removed, this because when we use 0
fresh lifetime, the old lifetimer only stop rather firing at once, related code is allocation.go#L165.
Someone should re-read https://tools.ietf.org/html/rfc5766 and https://tools.ietf.org/html/rfc5389 and fix deviations from spec
Hi, Thanks for your awesome code.
I have a problem.
I've followed these commands to run the server
$ wget -q https://github.com/pions/turn/releases/download/1.0.3/simple-turn-linux-amd64
$ chmod +x simple-turn-linux-amd64
$ export USERS='user=password nariman=nariman'
$ export REALM=myDomain.com
$ export UDP_PORT=3478
$ ./simple-turn-linux-amd64
And I tried to check it out with this tool
The terminal showing me this error
Failed to handle ALLOCATE-REQUEST from 69.175.34.181:61666: Relay already allocated for 5-TUPLE
Failed to handle ALLOCATE-REQUEST from 69.175.34.181:61668: Relay already allocated for 5-TUPLE
I didn't find any way to solve this.
I'm running this code on Google Cloud - Ubuntu 16.
Continuing #16 it was reported that FireFox currently doesn't work, investigate and fix
We will try to implement a new TURN client in a way that would solve all the above problems, without having to modify pion/turnc (would be hard).
The pion/turn has its own client but it does not support TURN protocol. It's a clean place to try out the new implementation of TURN client, while leaving the pion/turnc as is to leave us "two-way door".
Modify pion/turnc .... I have tried, but it is really complex. Abstraction of channel as a net.Conn has been found fundamentally intervening in allowing ICE to detect prflx candidate which is necessary to traverse remote symmetric NAT even local end uses TURN.
Details of issues I have found and my refactoring plan is described here
We currently provide a binary release where you can configure the port & users with environment variables. This is rather limited. We should look into supporting multiple ways of configuration and authentication. E.g.: multiple off-the-shelf version of AuthenticateRequest
. It's not entirely clear yet how to best do this. It's probably infeasible to support any kind of configuration and authentication source imaginable. Maybe there is a good balance.
One thing to consider is that this will probably introduce additional external dependencies. This should definitely be avoided in this repo since it will likely become a dependency of pions/webrtc
at some point. Therefore, one thing to consider is creating a pions/turn-server
repo where we build out the more fully featured off-the-shelf server.
This point has come up a couple times now:
Update the readme style to match pions/webrtc.
After running the server for a day and getting a regular influx of users, I was unable to use the TURN server and got many of these errors in the console:
2018/12/07 17:32:57 Failed to handle ALLOCATE-REQUEST from x.x.x.x:37291: listen udp4 0.0.0.0:0: socket: too many open files
Looks like I accidentally dropped it when resolving the bad merge conflict. (I dropped the old turn.go API and brought the low-level API which was hidden inside the "internal" folder which had a conflict with @songjiayang's changes.)
I noticed that when a request contained Requested-Transport attribute in CreatePermission, RefreshRequest or ChannelBind request, the TURN server never complains it and handles it as if it was no there.
The coturn however, returns 420 (Unknown Attribute) in the above cases.
Our TURN client is being tested with its own TURN server, it would be great to generate errors when the server sees unexpected situations.
We need to add additional error handling to Allocation creation
I deployed coturn server on AWS EC2, using -X option to assign a public (elastic) IP address so that allocated relayed transport address is routable.
If I use ICETransportPolicyRelay
(use relay only), two pion nodes wouldn't connect with each other. The reason is, and I am pretty sure, the 1:1 private/public port mapper AWS provides (configured via security group) does not route packets between the ports on the same public IP address - so called, the hairpinning routing, is not supported.
It would be great if pion/turn server support, in addition to #56, this hairpinning routing (the green line below) which coturn does not even offer. (I reviewed its config 100 times...)
I believe, as long as UDP get through your local NAT/Firewall, then a relay-to-relay candidate wouldn't be necessary in most cases. Also, if many TURN servers are deployed, then the chances of two endpoints using the same instance of TURN server would be low.
But, if:
Support of the hairpinning behavior would be crucial.
(also, support of it is not expensive)
Add two relay candidates, maybe?
As we only support UDP right now. This is a low priority, I'd say.
I don't believe this is an issue with us, see this mailing list post
When you want to host TURN server on AWS EC2 for instance, the instance can have a private IP address, but not public address directly. It allows us to have an associated public IP address (or Elastic IP, etc, there will be a NAT in betwee), but TURN server does not know about the public IP address at all. Since it is TURN server's responsibility to report the public IP address to the TURN client, there need to be a way to tell the associated public IP address to the TURN server.
To make pion/turn available for real use cases.
Tell the external IP address via:
coturn, for instance, have -X option for this purpose.
$ docker pull pions/turn
Using default tag: latest
Error response from daemon: pull access denied for pions/turn, repository does not exist or may require 'docker login'
$ docker search pions/turn
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
bprodoehl/turnserver 13 [OK]
silverpeas Silverpeas is a turnkey and open-source Coll… 8 [OK]
turnkeylinux/openldap-13.0 TurnKey OpenLDAP - Open Source LDAP 8
zolochevska/turn-server A Docker container with the Coturn TURN serv… 7 [OK]
spreed/turnserver TURN server for WebRTC usage suitable for Sp… 7 [OK]
turnkeylinux/core-13.0 TurnKey Core - Common Base for All Appliances 5
turnkeylinux/observium-14.1 TurnKey Observium - Network Management and M… 5
turnkeylinux/lamp-13.0 TurnKey LAMP Stack - Web Stack (MySQL) 4
turnkeylinux/elgg-13.0 TurnKey Elgg - Social Networking Engine 3
turnkeylinux/openvpn-14.1 TurnKey OpenVPN - Open Source VPN solution 3
turnkeylinux/domain-controller-14.1 TurnKey Domain Controller - Drop-in PDC repl… 3
turnkeylinux/redmine-13.0 TurnKey Redmine - Integrated SCM & Project M… 2
turnkeylinux/fileserver-14.1 TurnKey File Server - Simple Network Attache… 2
cboulanger/turnkeylinux-lamp A Turnkeylinux LAMP Stack 1 [OK]
turniere/turniere-website The Website turnie.re 1
zealcomm/turnserver 1
turnkeylinux/sugarcrm-13.0 TurnKey SugarCRM - Business & Social CRM Sof… 1
turnkeylinux/openldap-14.1 TurnKey OpenLDAP - Open Source Directory Ser… 1
turnkeylinux/oscommerce-14.2 0
turnerdraco/drupal_tests Images for Turner Drupal tests 0
turnitin/jenkins 0
turnkeylinux/core-14.0 TurnKey Core - Common Base for All Appliances 0
steppechange/turn 0
lenart/heketi-turnkey Backing image for the heketi-turnkey deploym… 0 [OK]
turnkeylinux/django-14.1 TurnKey Django - High-level Python Web Frame… 0
I wrote a test: https://github.com/pion/ice/blob/topic-vnet/connectivity_vnet_test.go
in which there are symmetric NATs on both ends, if one end did not have TURN server URL (but has STUN server URL), the connection fails!
srflx-relay pair should succeed, when both ends have a symmetric NAT, and only one end have TURN server URL.
Connection fails.
Looking at this spec, TURN server (Permission) should do address-restricted filtering
To ease concerns amongst enterprise IT administrators that TURN could be used to bypass corporate firewall security, TURN includes the notion of permissions. TURN permissions mimic the address-restricted filtering mechanism of NATs that comply with [RFC4787].
But looking at the current implementation of TURN permission, the fingerprint includes port number... We should exclude the port number from the fingerprint and its comparison with the srcAddr.
@songjiayang Can you confirm my above observation?
Use a new Goroutine for UDP handle, current logic is server/server.go#L71 , it process the package one by one, when handle DataPacket
the another UDP request will be blocked.
simple-turn
doesn't compile (with commit eeda63b):
% go version
go version go1.11.5 linux/amd64
% cd ~/src/github.com/pions/turn/cmd/simple-turn
% go build
# github.com/pions/turn/internal/client
../../internal/client/stun.go:34:26: cannot use conn (type *ipv4.PacketConn) as type net.PacketConn in argument to stun.BuildAndSend:
*ipv4.PacketConn does not implement net.PacketConn (wrong type for ReadFrom method)
have ReadFrom([]byte) (int, *ipv4.ControlMessage, net.Addr, error)
want ReadFrom([]byte) (int, net.Addr, error)
# github.com/pions/turn/internal/allocation
../../internal/allocation/allocation.go:206:32: cannot use a.TurnSocket (type *ipv4.PacketConn) as type net.PacketConn in argument to stun.BuildAndSend:
*ipv4.PacketConn does not implement net.PacketConn (wrong type for ReadFrom method)
have ReadFrom([]byte) (int, *ipv4.ControlMessage, net.Addr, error)
want ReadFrom([]byte) (int, net.Addr, error)
I ran go get -u golang.org/x/net/...
to make sure I have the latest version of net/ipv4
. The build still fails for simple-turn.
Since we are embedded we should probably allow people to bring their own logger (and default to zerolog to the examples?)
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