kernel/tools/testing/selftests/net/ip_defrag.c, branch linux-5.2.y

selftests: net: ip_defrag: cover new IPv6 defrag behavior

2019-01-26T05:37:11Z

This patch adds several changes to the ip_defrag selftest, to cover new IPv6 defrag behavior: - min IPv6 frag size is now 8 instead of 1280 - new test cases to cover IPv6 defragmentation in nf_conntrack_reasm.c - new "permissive" mode in negative (overlap) tests: netfilter sometimes drops invalid packets without passing them to IPv6 underneath, and thus defragmentation sometimes succeeds when it is expected to fail; so the permissive mode does not fail the test if the correct reassembled datagram is received instead of a timeout. Signed-off-by: Peter Oskolkov Signed-off-by: David S. Miller

selftests: net: fix/improve ip_defrag selftest

2019-01-04T21:38:39Z

Commit ade446403bfb ("net: ipv4: do not handle duplicate fragments as overlapping") changed IPv4 defragmentation so that duplicate fragments, as well as _some_ fragments completely covered by previously delivered fragments, do not lead to the whole frag queue being discarded. This makes the existing ip_defrag selftest flaky. This patch * makes sure that negative IPv4 defrag tests generate truly overlapping fragments that trigger defrag queue drops; * tests that duplicate IPv4 fragments do not trigger defrag queue drops; * makes a couple of minor tweaks to the test aimed at increasing its code coverage and reduce flakiness. Signed-off-by: Peter Oskolkov Signed-off-by: David S. Miller

selftests: net: Clean up an unused variable

2018-10-05T21:53:44Z

Address compiler warning: ip_defrag.c: In function 'send_udp_frags': ip_defrag.c:206:16: warning: unused variable 'udphdr' [-Wunused-variable] struct udphdr udphdr; ^~~~~~ Signed-off-by: Jakub Sitnicki Signed-off-by: David S. Miller

selftests/net: add ipv6 tests to ip_defrag selftest

2018-09-22T02:45:53Z

This patch adds ipv6 defragmentation tests to ip_defrag selftest, to complement existing ipv4 tests. Signed-off-by: Peter Oskolkov Signed-off-by: David S. Miller

selftests/net: add ip_defrag selftest

2018-08-30T02:49:36Z

This test creates a raw IPv4 socket, fragments a largish UDP datagram and sends the fragments out of order. Then repeats in a loop with different message and fragment lengths. Then does the same with overlapping fragments (with overlapping fragments the expectation is that the recv times out). Tested: root@# time ./ip_defrag.sh ipv4 defrag PASS ipv4 defrag with overlaps PASS real 1m7.679s user 0m0.628s sys 0m2.242s A similar test for IPv6 is to follow. Signed-off-by: Peter Oskolkov Reviewed-by: Willem de Bruijn Signed-off-by: David S. Miller