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https://gitlab.nic.cz/knot/knot-dns.git
synced 2026-05-28 04:02:31 -04:00
63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
#!/usr/bin/env python3
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'''Test for EDNS0 UDP payload size limiting with respect to IP family'''
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from dnstest.test import Test
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t = Test(tsig=False)
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server4 = t.server("knot", address=4)
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server6 = t.server("knot", address=6)
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zone = t.zone("flags.")
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t.link(zone, server4)
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t.link(zone, server6)
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# Set common payload limit.
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server4.conf_srv().udp_max_payload = 1220
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server6.conf_srv().udp_max_payload = 1220
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t.start()
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# Check common limit if 1220 fits and 1221 does not.
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resp = server4.dig("1220resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(noflags="TC")
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resp = server4.dig("1221resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(flags="TC")
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resp = server6.dig("1220resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(noflags="TC")
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resp = server6.dig("1221resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(flags="TC")
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# Set IP family specific limit.
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server4.conf_srv().udp_max_payload_ipv4 = 1220
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server4.conf_srv().udp_max_payload_ipv6 = 1221 # Should not affect IPv4
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server4.conf_srv().udp_max_payload = 1221 # Should not override IPv4 specific
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server6.conf_srv().udp_max_payload_ipv6 = 1220
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server6.conf_srv().udp_max_payload_ipv4 = 1221 # Should not affect IPv6
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server6.conf_srv().udp_max_payload = 1221 # Should not override IPv6 specific
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server4.gen_confile()
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server4.reload()
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server6.gen_confile()
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server6.reload()
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# Check IP specific limit.
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resp = server4.dig("1220resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(noflags="TC")
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resp = server4.dig("1221resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(flags="TC")
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resp = server6.dig("1220resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(noflags="TC")
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resp = server6.dig("1221resp.flags", "TXT", udp=True, bufsize=4096)
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resp.check(flags="TC")
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t.end()
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