diff options
Diffstat (limited to 'vicn/resource/ip_assignment.py')
| -rw-r--r-- | vicn/resource/ip_assignment.py | 35 |
1 files changed, 11 insertions, 24 deletions
diff --git a/vicn/resource/ip_assignment.py b/vicn/resource/ip_assignment.py index 3bb16ff9..16624aa5 100644 --- a/vicn/resource/ip_assignment.py +++ b/vicn/resource/ip_assignment.py @@ -93,13 +93,14 @@ class IpAssignment(Resource): if not interfaces: continue - if self.PrefixClass is Inet6Prefix: - # 0 is forbidden - num_required_ip = len(interfaces) + 1 - elif channel.has_type("emulatedchannel"): #EmulatedChannel + IPv4 - num_required_ip = len(interfaces) + 2 + channel.nb_base_stations #Internet address + bcast - else: - num_required_ip = len(interfaces) + num_required_ip = len(interfaces) + if num_required_ip > 2: + # We must reserve the first IP (the internet address) and the last one (the broadcast address) + # It does not apply in the case of 2 addresses as you do not need broadcast on the point2point link + num_required_ip = num_required_ip + 2 + if channel.has_type("emulatedchannel"): + num_required_ip = num_required_ip + channel.nb_base_stations + min_prefix_len = math.ceil(math.log(num_required_ip, 2)) prefix_len = min(self.max_prefix_len, @@ -121,26 +122,12 @@ class IpAssignment(Resource): # Use an iterator to assign IPs from the prefix to the # interfaces - it = prefix.get_iterator(it_prefix_len) - # XXX MACCHA it is a prefix - - if channel.has_type("emulatedchannel"): - #Internet address - next(it) + # Skip internet address if necessary, i.e., if prefix contains more than 2 addresses + skip_internet_address = (prefix_len < self.PrefixClass.MAX_PREFIX_SIZE -1) + it = prefix.get_iterator(it_prefix_len, skip_internet_address = skip_internet_address) for interface in interfaces: if_prefix = next(it) - #XXX We cannot assign prefix::0 as a valid address to an interface. - #XXX For each interface with an ip6 address belonging to prefix, - #XXX linux add prefix::0 to the local routing table. Therefore prefix::0 cannot be - #XXX the address of a non local interface - ip = if_prefix.ip_address - if ip == prefix.first_prefix_address() and self.PrefixClass is Inet6Prefix: - if if_prefix.prefix_len < if_prefix.MAX_PREFIX_SIZE: - if_prefix.ip_address = ip+1 - else: - if_prefix = next(it) - if_prefix.prefix_len = prefix_len if self.PrefixClass is Inet6Prefix: address = Inet6Address(if_prefix.ip_address, prefix_len) |