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util: add comment explaining hostname_is_valid()
author
Lennart Poettering
<lennart@poettering.net>
Wed, 28 Jan 2015 16:48:05 +0000
(17:48 +0100)
committer
Lennart Poettering
<lennart@poettering.net>
Wed, 28 Jan 2015 16:48:05 +0000
(17:48 +0100)
src/shared/util.c
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diff --git
a/src/shared/util.c
b/src/shared/util.c
index 891182a35b70d4460aa2082914753090305f6621..11cab6dcf1710f590b2a879f019f274ead1e6020 100644
(file)
--- a/
src/shared/util.c
+++ b/
src/shared/util.c
@@
-4248,6
+4248,11
@@
bool hostname_is_valid(const char *s) {
if (isempty(s))
return false;
+ /* Doesn't accept empty hostnames, hostnames with trailing or
+ * leading dots, and hostnames with multiple dots in a
+ * sequence. Also ensures that the length stays below
+ * HOST_NAME_MAX. */
+
for (p = s, dot = true; *p; p++) {
if (*p == '.') {
if (dot)