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-rw-r--r--src/plugins/nat/nat44-ed/nat44_ed.c4
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