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187706c348
Test that the DHCPv4 lease got renewed after the T1 timer runs out. Then also simulate the DHCPREQUEST during renew being lost and retransmitted and the lease eventually getting renewed T1 + 60s later. The main downside is that this test will inevitably take a while if running in Qemu without the time travel ability. Update the test and some utility code to run hostapd in an isolated net namespace for connection_test.py. We now need a second hostapd instance though because in static_test.py we test ACD and we need to produce an IP conflict. Moving the hostapd instance unexpectedly fixes dhcpd's internal mechanism to avoid IP conflicts and it would no longer assign 192.168.1.10 to the second client, it'd notice that address was already in use and assign the next free address, or fail if there was none. So add a second hostapd instance that runs in the main namespace together with the statically-configured client, it turns out the test relies on the kernel being unable to deliver IP traffic to interfaces on the same system.
26 lines
1.0 KiB
ISCdhcpd
26 lines
1.0 KiB
ISCdhcpd
default-lease-time 120; # 2 minutes
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min-lease-time 120; # 2 minutes
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max-lease-time 120; # 2 minutes
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option dhcp-renewal-time 15; # 15 secs for T1
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# We set a relatively low lease lifetime of 2 minutes but our renewal interval
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# (T1) is still unproportionally low to speed the test up -- 12% instead of the
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# default 50% lifetime value. We need a lifetime in the order of minutes
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# because minimum lease renewal retry interval is 60s per spec. However by
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# default dhcpd will not renew leases that are newer than 25% their lifetime.
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# Set that threshold to 1% so that we can verify that the lease is renewed
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# without waiting too long.
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dhcp-cache-threshold 1;
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option broadcast-address 192.168.127.255;
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option routers 192.168.1.254;
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option subnet-mask 255.255.128.0;
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subnet 192.168.0.0 netmask 255.255.128.0
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{
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option routers 192.168.1.1;
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option subnet-mask 255.255.128.0;
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option domain-name-servers 192.168.1.2;
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range 192.168.1.10 192.168.1.20;
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range 192.168.1.100 192.168.1.200;
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}
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