[PATCH] udhcpc: dns labels can actually start with a number

[Arthur Gautier]

While RFC1035 recommends a label not to start with a number, there is
actually no such limitation in dns. One may buy a domain name like
0x1.net and use it.

This commit remove this check and allow a user to use such domains.

Signed-off-by: Arthur Gautier <baloo at gandi.net>
---
 networking/udhcp/dhcpc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 9d3d1a31caf9..811a1a1eebe5 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -156,10 +156,6 @@ static const char *valid_domain_label(const char *label)
 	for (;;) {
 		ch = *label;
 		if ((ch|0x20) < 'a' || (ch|0x20) > 'z') {
-			if (pos == 0) {
-				/* label must begin with letter */
-				return NULL;
-			}
 			if (ch < '0' || ch > '9') {
 				if (ch == '\0' || ch == '.')
 					return label;
-- 
2.1.4