From: David Cantrell <dcantrell@xxxxxxxxxx>
Hostnames can start with digits. Removed inStrRange() since
it seemed a little redundant. Left hostname length check at
64 characters, but put a comment reminding me that POSIX
sets this limit to 255, so we should examine this in the
future again.
---
network.py | 25 ++++++++++++-------------
1 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/network.py b/network.py
index 0327ef9..0feb8fd 100644
--- a/network.py
+++ b/network.py
@@ -37,26 +37,25 @@ class IPError(Exception):
class IPMissing(Exception):
pass
-def inStrRange(v, s):
- if string.find(s, v) == -1:
- return 0
- else:
- return 1
-
def sanityCheckHostname(hostname):
if len(hostname) < 1:
return None
+ # XXX: POSIX says this limit is 255, but Linux also defines HOST_NAME_MAX
+ # as 64, so I don't know which we should believe. --dcantrell
if len(hostname) > 64:
- return _("Hostname must be 64 or less characters in length.")
-
- if not inStrRange(hostname[0], string.ascii_letters):
- return _("Hostname must start with a valid character in the range "
- "'a-z' or 'A-Z'")
+ return _("Hostname must be 64 or fewer characters in length.")
+
+ validStart = string.ascii_letters + string.digits
+ validAll = validStart + ".-"
+
+ if string.find(validStart, hostname[0]) == -1:
+ return _("Hostname must start with a valid character in the ranges "
+ "'a-z', 'A-Z', or '0-9'")
for i in range(1, len(hostname)):
- if not inStrRange(hostname[i], string.ascii_letters+string.digits+".-"):
- return _("Hostnames can only contain the characters 'a-z', 'A-Z', '-', or '.'")
+ if string.find(validAll, hostname[i]) == -1:
+ return _("Hostnames can only contain the characters 'a-z', 'A-Z', '0-9', '-', or '.'")
return None
--
1.7.2.1
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