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-rw-r--r--contrib/ecs-gen/README.md10
-rwxr-xr-xcontrib/ecs-gen/dnsperf-ecs-gen.py10
2 files changed, 20 insertions, 0 deletions
diff --git a/contrib/ecs-gen/README.md b/contrib/ecs-gen/README.md
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--- /dev/null
+++ b/contrib/ecs-gen/README.md
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+# dnsperf-ecs-gen
+
+Small python script to generate EDNS Client Subnet options for `dnsperf`.
+
+Requires `dnspython` to be installed.
+
+```
+$ ./dnsperf-ecs-gen 192.168.0.1/24
+-e 8:00011800c0a800
+```
diff --git a/contrib/ecs-gen/dnsperf-ecs-gen.py b/contrib/ecs-gen/dnsperf-ecs-gen.py
new file mode 100755
index 0000000..9a637e2
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+++ b/contrib/ecs-gen/dnsperf-ecs-gen.py
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+#!/usr/bin/env python3
+
+import dns.edns
+import sys
+
+if len(sys.argv) > 1:
+ opt = dns.edns.ECSOption.from_text(sys.argv[1])
+ print("-e %d:%s" % (dns.edns.ECS, opt.to_wire().hex()))
+else:
+ print("usage: dnsperf-ecs-gen.py <address/srclen[/scopelen]>")