net/netcheck: try ICMP if UDP is blocked (#5056)

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
2022-08-04 17:10:13 -04:00
parent ddebd30917
commit f0d6f173c9
11 changed files with 634 additions and 7 deletions
--- a/tailcfg/tailcfg_test.go
+++ b/tailcfg/tailcfg_test.go
@ -502,6 +502,7 @@ func TestNetInfoFields(t *testing.T) {
 		"WorkingIPv6",
 		"OSHasIPv6",
 		"WorkingUDP",
+		"WorkingICMPv4",
 		"HavePortMap",
 		"UPnP",
 		"PMP",