D5804: zeroconf: Python 3 porting of vendored library

[indygreg (Gregory Szorc)]

indygreg created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  A quick glance through this module reveals that most of it "just works"
  on Python 3 with the source transformer active. There are a few
  places where we need to ensure we're using str.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5804

AFFECTED FILES
  hgext/zeroconf/Zeroconf.py

CHANGE DETAILS

diff --git a/hgext/zeroconf/Zeroconf.py b/hgext/zeroconf/Zeroconf.py
--- a/hgext/zeroconf/Zeroconf.py
+++ b/hgext/zeroconf/Zeroconf.py
@@ -106,7 +106,7 @@
 
 # Some DNS constants
 
-_MDNS_ADDR = '224.0.0.251'
+_MDNS_ADDR = r'224.0.0.251'
 _MDNS_PORT = 5353
 _DNS_PORT = 53
 _DNS_TTL = 60 * 60 # one hour default TTL
@@ -221,7 +221,7 @@
     """A DNS entry"""
 
     def __init__(self, name, type, clazz):
-        self.key = string.lower(name)
+        self.key = name.lower()
         self.name = name
         self.type = type
         self.clazz = clazz & _CLASS_MASK
@@ -620,7 +620,7 @@
         first = off
 
         while True:
-            len = ord(self.data[off])
+            len = ord(self.data[off:off + 1])
             off += 1
             if len == 0:
                 break
@@ -631,7 +631,7 @@
             elif t == 0xC0:
                 if next < 0:
                     next = off + 1
-                off = ((len & 0x3F) << 8) | ord(self.data[off])
+                off = ((len & 0x3F) << 8) | ord(self.data[off:off + 1])
                 if off >= first:
                     raise BadDomainNameCircular(off)
                 first = off
@@ -1333,7 +1333,7 @@
             # SO_REUSEADDR and SO_REUSEPORT have been set, so ignore it
             pass
         self.socket.setsockopt(socket.SOL_IP, socket.IP_ADD_MEMBERSHIP,
-            socket.inet_aton(_MDNS_ADDR) + socket.inet_aton('0.0.0.0'))
+            socket.inet_aton(_MDNS_ADDR) + socket.inet_aton(r'0.0.0.0'))
 
         self.listeners = []
         self.browsers = []
@@ -1657,7 +1657,7 @@
             self.engine.notify()
             self.unregisterAllServices()
             self.socket.setsockopt(socket.SOL_IP, socket.IP_DROP_MEMBERSHIP,
-                socket.inet_aton(_MDNS_ADDR) + socket.inet_aton('0.0.0.0'))
+                socket.inet_aton(_MDNS_ADDR) + socket.inet_aton(r'0.0.0.0'))
             self.socket.close()
 
 # Test a few module features, including service registration, service



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Cc: mercurial-devel