From: Russ Cox <rsc@golang.org>
Date: Thu, 7 Oct 2010 10:45:50 +0000 (-0400)
Subject: net: allow _ in names
X-Git-Tag: weekly.2010-10-13~46
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=2408a4bbbd8db78c890b9911868fb4face7558d7;p=gostls13.git

net: allow _ in names

Enables lookup of _jabber._tcp.gmail.com's SRV record.

Fixes #1167.

R=r, r2
CC=golang-dev
https://golang.org/cl/2353043
---

diff --git a/src/pkg/net/dnsclient.go b/src/pkg/net/dnsclient.go
index 0343dd2f0a..16103c4d05 100644
--- a/src/pkg/net/dnsclient.go
+++ b/src/pkg/net/dnsclient.go
@@ -207,7 +207,7 @@ func isDomainName(s string) bool {
 		switch {
 		default:
 			return false
-		case 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z':
+		case 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '_':
 			ok = true
 		case '0' <= c && c <= '9':
 			// fine