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cmd/tailscale/cli: add ping subcommand

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For example:

$ tailscale ping -h
USAGE
  ping <hostname-or-IP>

FLAGS
  -c 10                   max number of pings to send
  -stop-once-direct true  stop once a direct path is established
  -verbose false          verbose output

$ tailscale ping mon.ts.tailscale.com
pong from monitoring (100.88.178.64) via DERP(sfo) in 65ms
pong from monitoring (100.88.178.64) via DERP(sfo) in 252ms
pong from monitoring (100.88.178.64) via [2604:a880:2:d1::36:d001]:41641 in 33ms

Fixes #661

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2020-08-09 14:49:42 -07:00
committed by Brad Fitzpatrick
parent d65e2632ab
commit 84dc891843
11 changed files with 379 additions and 40 deletions
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5
wgengine/wgengine.go
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@@ -9,6 +9,7 @@ import (
"time"
"github.com/tailscale/wireguard-go/wgcfg"
"inet.af/netaddr"
"tailscale.com/control/controlclient"
"tailscale.com/ipn/ipnstate"
"tailscale.com/tailcfg"
@@ -123,4 +124,8 @@ type Engine interface {
// UpdateStatus populates the network state using the provided
// status builder.
UpdateStatus(*ipnstate.StatusBuilder)
// Ping is a request to start a discovery ping with the peer handling
// the given IP and then call cb with its ping latency & method.
Ping(ip netaddr.IP, cb func(*ipnstate.PingResult))
}