diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/btf_skc_cls_ingress.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/btf_skc_cls_ingress.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/btf_skc_cls_ingress.c b/tools/testing/selftests/bpf/prog_tests/btf_skc_cls_ingress.c index 29b946d84816..cf15cc3be491 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf_skc_cls_ingress.c +++ b/tools/testing/selftests/bpf/prog_tests/btf_skc_cls_ingress.c @@ -27,6 +27,8 @@ #define SERVER_ADDR_IPV4 "127.0.0.1" #define SERVER_ADDR_IPV6 "::1" #define SERVER_ADDR_DUAL "::0" +/* RFC791, 576 for minimal IPv4 datagram, minus 40 bytes of TCP header */ +#define MIN_IPV4_MSS 536 static struct netns_obj *prepare_netns(struct test_btf_skc_cls_ingress *skel) { @@ -71,6 +73,7 @@ static void reset_test(struct test_btf_skc_cls_ingress *skel) skel->bss->recv_cookie = 0; skel->bss->gen_cookie = 0; skel->bss->linum = 0; + skel->bss->mss = 0; } static void print_err_line(struct test_btf_skc_cls_ingress *skel) @@ -183,6 +186,10 @@ static void run_test(struct test_btf_skc_cls_ingress *skel, bool gen_cookies, "syncookie properly generated"); ASSERT_EQ(skel->bss->gen_cookie, skel->bss->recv_cookie, "matching syncookies on client and server"); + ASSERT_GT(skel->bss->mss, MIN_IPV4_MSS, + "MSS in cookie min value"); + ASSERT_LT(skel->bss->mss, USHRT_MAX, + "MSS in cookie max value"); } done: |