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Make STUN run by default when embedded DERP is enabled

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This commit also allows to set an external STUN server, while running the embedded DERP server (without embedded STUN)
This commit is contained in:
Juan Font Alonso 2022-03-15 13:22:25 +01:00
parent 61440c42d3
commit b8aad5451d
4 changed files with 21 additions and 12 deletions
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5
app.go
View file

@ -62,6 +62,7 @@ const (
errUnsupportedLetsEncryptChallengeType = Error(
"unknown value for Lets Encrypt challenge type",
)
errSTUNAddressNotSet = Error("STUN address not set")
DisabledClientAuth = "disabled"
RelaxedClientAuth = "relaxed"
@ -502,6 +503,10 @@ func (h *Headscale) Serve() error {
h.DERPMap = GetDERPMap(h.cfg.DERP)
if h.cfg.DERP.ServerEnabled {
if h.cfg.DERP.STUNAddr == "" { // When embedded DERP is enabled we always need a STUN server address, embedded or external
return errSTUNAddressNotSet
}
h.DERPMap.Regions[h.DERPServer.region.RegionID] = &h.DERPServer.region
if h.cfg.DERP.STUNEnabled {
go h.ServeSTUN()

3
cmd/headscale/cli/utils.go
View file

@ -55,6 +55,9 @@ func LoadConfig(path string) error {
viper.SetDefault("dns_config", nil)
viper.SetDefault("derp.server.enabled", false)
viper.SetDefault("derp.server.stun.enabled", true)
viper.SetDefault("unix_socket", "/var/run/headscale.sock")
viper.SetDefault("unix_socket_permission", "0o770")

7
config-example.yaml
View file

@ -69,10 +69,13 @@ derp:
region_code: "headscale"
region_name: "Headscale Embedded DERP"
# If enabled, also listens in UDP at the configured address for STUN connections to help on NAT traversal
# Enabled by default when embedded DERP is enabled. Listens in UDP at the configured address for STUN connections
# to help on NAT traversal.
# If DERP is enabled, but STUN is disabled you still need to input an external STUN server in the listen_addr field.
#
# For more details on how this works, check this great article: https://tailscale.com/blog/how-tailscale-works/
stun:
enabled: false
enabled: true
listen_addr: "0.0.0.0:3478"
# List of externally available DERP maps encoded in JSON

18
derp_server.go
View file

@ -77,17 +77,15 @@ func (h *Headscale) generateRegionLocalDERP() (tailcfg.DERPRegion, error) {
},
}
if h.cfg.DERP.STUNEnabled {
_, portStr, err := net.SplitHostPort(h.cfg.DERP.STUNAddr)
if err != nil {
return tailcfg.DERPRegion{}, err
}
port, err := strconv.Atoi(portStr)
if err != nil {
return tailcfg.DERPRegion{}, err
}
localDERPregion.Nodes[0].STUNPort = port
_, portSTUNStr, err := net.SplitHostPort(h.cfg.DERP.STUNAddr)
if err != nil {
return tailcfg.DERPRegion{}, err
}
portSTUN, err := strconv.Atoi(portSTUNStr)
if err != nil {
return tailcfg.DERPRegion{}, err
}
localDERPregion.Nodes[0].STUNPort = portSTUN
return localDERPregion, nil
}