trafgen: Dump proto headers in *.cfg format

Added trafgen_dump.c module which dumps headers from packet
in .cfg format. Packet is dumped if -o <file>.cfg was specified,
it might be useful to specify *.pcap file as input and convert it
into .cfg file to edit proto fields in human readable format.

To make it possible several main changes were added:

    1) packet id is embedded into struct packet.id, and
       it is updated on each realloc_packet()

    2) Added new struct proto_hdr.get_next_proto callback
       to make possible apply fields of next header.

    3) Added new dev_io ops for writting packets into .cfg file,
       to re-use common dev_io mechsnism for packets dumping.

Before dump the default ETH_PROTO fields are applied as first header and
then next proto_hdr is identified via .get_next_proto(...) callback.

Meanwhile only eth, arp, vlan, ip4, udp, & tcp protos can be dissected
into *.cfg format.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/trafgen_conf.h b/trafgen_conf.h
index 7e922fe..a0bbe43 100644
--- a/trafgen_conf.h
+++ b/trafgen_conf.h
@@ -37,11 +37,13 @@ struct csum16 {
 };
 
 struct packet {
+	uint32_t id;
 	uint8_t *payload;
 	size_t len;
 	struct proto_hdr *headers[PROTO_MAX_LAYERS];
 	size_t headers_count;
 	struct timespec tstamp;
+	bool is_created;
 };
 
 struct packet_dyn {