tsconst
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Overview¶
Package tsconst exports some constants used elsewhere in thecodebase.
Index¶
Constants¶
const (HealthWarnableUpdateAvailable = "update-available"HealthWarnableSecurityUpdateAvailable = "security-update-available"HealthWarnableIsUsingUnstableVersion = "is-using-unstable-version"HealthWarnableNetworkStatus = "network-status"HealthWarnableWantRunningFalse = "wantrunning-false"HealthWarnableLocalLogConfigError = "local-log-config-error"HealthWarnableLoginState = "login-state"HealthWarnableNotInMapPoll = "not-in-map-poll"HealthWarnableNoDERPHome = "no-derp-home"HealthWarnableNoDERPConnection = "no-derp-connection"HealthWarnableDERPTimedOut = "derp-timed-out"HealthWarnableDERPRegionError = "derp-region-error"HealthWarnableNoUDP4Bind = "no-udp4-bind"HealthWarnableMapResponseTimeout = "mapresponse-timeout"HealthWarnableTLSConnectionFailed = "tls-connection-failed"HealthWarnableMagicsockReceiveFuncError = "magicsock-receive-func-error"HealthWarnableTestWarnable = "test-warnable"HealthWarnableApplyDiskConfig = "apply-disk-config"HealthWarnableWarmingUp = "warming-up")
const (// The mask for reading/writing the 'firewall mask' bits on a packet.// See the comment on the const block on why we only use the third byte.//// We claim bits 16:23 entirely. For now we only use the lower four// bits, leaving the higher 4 bits for future use.LinuxFwmarkMask = "0xff0000"LinuxFwmarkMaskNum = 0xff0000// Packet is from Tailscale and to a subnet route destination, so// is allowed to be routed through this machine.LinuxSubnetRouteMark = "0x40000"LinuxSubnetRouteMarkNum = 0x40000// Packet was originated by tailscaled itself, and must not be// routed over the Tailscale network.LinuxBypassMark = "0x80000"LinuxBypassMarkNum = 0x80000)
The following bits are added to packet marks for Tailscale use.
We tried to pick bits sufficiently out of the way that it'sunlikely to collide with existing uses. We have 4 bytes of markbits to play with. We leave the lower byte alone on the assumptionthat sysadmins would use those. Kubernetes uses a few bits in thesecond byte, so we steer clear of that too.
Empirically, most of the documentation on packet marks on theinternet gives the impression that the marks are 16 bitswide. Based on this, we theorize that the upper two bytes arerelatively unused in the wild, and so we consume bits 16:23 (thethird byte).
The constants are in the iptables/iproute2 string format formatching and setting the bits, so they can be directly embedded incommands.
const TailnetLockNotTrustedMsg = "this node is not trusted by network lock"TailnetLockNotTrustedMsg is the error message used by network lockand sniffed (via substring) out of an error sent over the network.
const WebListenPort = 5252WebListenPort is the static port used for the web client when run insidetailscaled. (5252 are the numbers above the letters "TSTS" on a qwertykeyboard.)
const WintunInterfaceDesc = "Tailscale Tunnel"WintunInterfaceDesc is the description attached to Tailscaleinterfaces on Windows. This is set by the WinTun driver.
const WintunInterfaceDesc0_14 = "Wintun Userspace Tunnel"Variables¶
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Functions¶
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Types¶
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