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Fixes #6350: Include first & last IP addresses when allocating available IPv6 addresses via the REST API

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jeremystretch 2021-05-06 13:59:10 -04:00
parent a4955b420a
commit 7f2f98885b
2 changed files with 4 additions and 11 deletions
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1
docs/release-notes/version-2.11.md
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@ -18,6 +18,7 @@
* [#6321](https://github.com/netbox-community/netbox/issues/6321) - Restore "add an IP" button under prefix IPs view
* [#6333](https://github.com/netbox-community/netbox/issues/6333) - Fix filtering of circuit terminations by primary key
* [#6339](https://github.com/netbox-community/netbox/issues/6339) - Improve ordering of interfaces when viewing virtual chassis master
* [#6350](https://github.com/netbox-community/netbox/issues/6350) - Include first & last IP addresses when allocating available IPv6 addresses via the REST API
* [#6355](https://github.com/netbox-community/netbox/issues/6355) - Fix caching error when swapping A/Z circuit terminations
* [#6357](https://github.com/netbox-community/netbox/issues/6357) - Fix ProviderNetwork nested API serializer
* [#6363](https://github.com/netbox-community/netbox/issues/6363) - Correct pre-population of cluster group when creating a cluster

14
netbox/ipam/models/ip.py
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@ -426,19 +426,11 @@ class Prefix(PrimaryModel):
child_ips = netaddr.IPSet([ip.address.ip for ip in self.get_child_ips()])
available_ips = prefix - child_ips
# All IP addresses within a pool are considered usable
if self.is_pool:
# IPv6, pool, or IPv4 /31 sets are fully usable
if self.family == 6 or self.is_pool or self.prefix.prefixlen == 31:
return available_ips
# All IP addresses within a point-to-point prefix (IPv4 /31 or IPv6 /127) are considered usable
if (
self.prefix.version == 4 and self.prefix.prefixlen == 31 # RFC 3021
) or (
self.prefix.version == 6 and self.prefix.prefixlen == 127 # RFC 6164
):
return available_ips
# Omit first and last IP address from the available set
# For "normal" IPv4 prefixes, omit first and last addresses
available_ips -= netaddr.IPSet([
netaddr.IPAddress(self.prefix.first),
netaddr.IPAddress(self.prefix.last),