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cmd/syncthing: Improve local host check (fixes #4815) (#4816)

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This does a less restrictive (and more correct) check on the IP address,
and also allows the fully qualified "localhost.".
This commit is contained in:
Jakob Borg 2018-03-15 11:29:52 +01:00 committed by Simon Frei
parent bea3c01772
commit 7872bfa173
2 changed files with 15 additions and 2 deletions
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9
cmd/syncthing/gui.go
View File

@ -1560,9 +1560,14 @@ func addressIsLocalhost(addr string) bool {
host = addr
}
switch strings.ToLower(host) {
case "127.0.0.1", "::1", "localhost":
case "localhost", "localhost.":
return true
default:
return false
ip := net.ParseIP(host)
if ip == nil {
// not an IP address
return false
}
return ip.IsLoopback()
}
}

8
cmd/syncthing/gui_test.go
View File

@ -842,16 +842,24 @@ func TestAddressIsLocalhost(t *testing.T) {
// These are all valid localhost addresses
{"localhost", true},
{"LOCALHOST", true},
{"localhost.", true},
{"::1", true},
{"127.0.0.1", true},
{"127.23.45.56", true},
{"localhost:8080", true},
{"LOCALHOST:8000", true},
{"localhost.:8080", true},
{"[::1]:8080", true},
{"127.0.0.1:8080", true},
{"127.23.45.56:8080", true},
// These are all non-localhost addresses
{"example.com", false},
{"example.com:8080", false},
{"localhost.com", false},
{"localhost.com:8080", false},
{"www.localhost", false},
{"www.localhost:8080", false},
{"192.0.2.10", false},
{"192.0.2.10:8080", false},
{"0.0.0.0", false},