trafgen: proto: Move proto headers into packet

Until now headers were used only for packet creation at compile time,
which does not allow to handle dynamic field updates at runtime. To
support dynamic updates, it is necessary to keep the proto_hdr entries
around after packet compilation so we can reference the header fields to
dynamically update.

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: Adjust patch description, simplify code]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 6 insertions, 0 deletions

diff --git a/trafgen_conf.h b/trafgen_conf.h
index efce29c..934f8fe 100644
--- a/trafgen_conf.h
+++ b/trafgen_conf.h
@@ -5,6 +5,10 @@
 #include <stdio.h>
 #include <sys/types.h>
 
+#include "trafgen_proto.h"
+
+#define PROTO_MAX_LAYERS	16
+
 #define TYPE_INC	0
 #define TYPE_DEC	1
 
@@ -34,6 +38,8 @@ struct csum16 {
 struct packet {
 	uint8_t *payload;
 	size_t len;
+	struct proto_hdr *headers[PROTO_MAX_LAYERS];
+	size_t headers_count;
 };
 
 struct packet_dyn {