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| author |   Klement Sekera <ksekera@cisco.com> | 2021-03-25 18:47:48 +0100 |
|---|---|---|
| committer | Klement Sekera <ksekera@cisco.com> | 2021-03-31 11:46:54 +0000 |
| commit | 68b493ff2fa04b3d283e9476e77ea2db116b1dd8 (patch) | |
| tree | c77128701eff4cc5fe87d7c1c2964aa1ee5263d3 | |
| parent | 8f76064716f46b716b4900154c7ac8e110c65ae6 (diff) | |
nat: avoid creating negative zero checksum
Type: fix
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Change-Id: Ibbb72e77c751b7e775620cfb160b52ceff2da86b
| -rw-r--r-- | src/plugins/nat/nat44-ed/nat44_ed.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/plugins/nat/nat44-ed/nat44_ed.c b/src/plugins/nat/nat44-ed/nat44_ed.c index dc784d9ee92..6a0b962de6e 100644 --- a/src/plugins/nat/nat44-ed/nat44_ed.c +++ b/src/plugins/nat/nat44-ed/nat44_ed.c @@ -3330,7 +3330,9 @@ nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, ip_csum_t ip_sum = ip->checksum; ip_sum = ip_csum_sub_even (ip_sum, f->l3_csum_delta); ip->checksum = ip_csum_fold (ip_sum); - ASSERT (ip->checksum == ip4_header_checksum (ip)); + if (0xffff == ip->checksum) + ip->checksum = 0; + ASSERT (ip4_header_checksum_is_valid (ip)); } static_always_inline int |