trafgen: ipv4: Update csum at runtime if needed

Handle 'field_changed' callback to check if IPv4 csum is needed to be
recalculated, if so - update it on 'packet_update' event.

Added 'is_csum_valid' to proto_hdr struct to check if csum needs to be
updated.

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 1 insertions, 0 deletions

diff --git a/trafgen_proto.h b/trafgen_proto.h
index 41e9383..000938c 100644
--- a/trafgen_proto.h
+++ b/trafgen_proto.h
@@ -48,6 +48,7 @@ struct proto_hdr {
 	uint32_t pkt_id;
 	struct proto_field *fields;
 	size_t fields_count;
+	bool is_csum_valid;
 	size_t len;
 };