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contrib: Count entry differences in asmap-tool diff summary

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Also uses num_addresses from ipaddress instead of calculating it
ourselves.
This commit is contained in:
Fabian Jahr
2025-11-22 01:54:28 +01:00
parent a07bd8415d
commit fd4ce55121
1 changed files with 9 additions and 4 deletions
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13
contrib/asmap/asmap-tool.py
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@@ -140,15 +140,19 @@ def main():
state1 = load_file(args.infile1)
state2 = load_file(args.infile2)
ipv4_changed = 0
ipv4_entries_changed = 0
ipv6_changed = 0
ipv6_entries_changed = 0
for prefix, old_asn, new_asn in state1.diff(state2):
if args.ignore_unassigned and old_asn == 0:
continue
net = asmap.prefix_to_net(prefix)
if isinstance(net, ipaddress.IPv4Network):
ipv4_changed += 1 << (32 - net.prefixlen)
ipv4_changed += net.num_addresses
ipv4_entries_changed += 1
elif isinstance(net, ipaddress.IPv6Network):
ipv6_changed += 1 << (128 - net.prefixlen)
ipv6_changed += net.num_addresses
ipv6_entries_changed += 1
if new_asn == 0:
print(f"# {net} was AS{old_asn}")
elif old_asn == 0:
@@ -159,8 +163,9 @@ def main():
ipv6_change_str = "" if ipv6_changed == 0 else f" (2^{math.log2(ipv6_changed):.2f})"
print(
f"# {ipv4_changed}{ipv4_change_str} IPv4 addresses changed; "
f"{ipv6_changed}{ipv6_change_str} IPv6 addresses changed"
f"""# Summary
IPv4: {ipv4_entries_changed} entries with {ipv4_changed}{ipv4_change_str} addresses changed
IPv6: {ipv6_entries_changed} entries with {ipv6_changed}{ipv6_change_str} addresses changed"""
)
elif args.subcommand == "diff_addrs":
state1 = load_file(args.infile1)