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Diffstat (limited to 'trafgen_l2.c')
-rw-r--r--trafgen_l2.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/trafgen_l2.c b/trafgen_l2.c
index 529dc36..c0e92a3 100644
--- a/trafgen_l2.c
+++ b/trafgen_l2.c
@@ -6,6 +6,7 @@
#include <net/if_arp.h>
#include <linux/if_ether.h>
+#include "die.h"
#include "built_in.h"
#include "trafgen_l2.h"
#include "trafgen_proto.h"
@@ -16,6 +17,27 @@ static struct proto_field eth_fields[] = {
{ .id = ETH_TYPE, .len = 2, .offset = 12 },
};
+static void eth_set_next_proto(struct proto_hdr *hdr, enum proto_id pid)
+{
+ uint16_t eth_type;
+
+ switch(pid) {
+ case PROTO_ARP:
+ eth_type = ETH_P_ARP;
+ break;
+ case PROTO_IP4:
+ eth_type = ETH_P_IP;
+ break;
+ case PROTO_IP6:
+ eth_type = ETH_P_IPV6;
+ break;
+ default:
+ panic("eth: Not supported protocol id %u\n", pid);
+ }
+
+ proto_field_set_default_be16(hdr, ETH_TYPE, eth_type);
+}
+
static void eth_header_init(struct proto_hdr *hdr)
{
proto_header_fields_add(hdr, eth_fields, array_size(eth_fields));
@@ -27,6 +49,7 @@ static struct proto_hdr eth_hdr = {
.id = PROTO_ETH,
.layer = PROTO_L2,
.header_init = eth_header_init,
+ .set_next_proto = eth_set_next_proto,
};
static struct proto_field arp_fields[] = {
@@ -51,7 +74,6 @@ static void arp_header_init(struct proto_hdr *hdr)
uint8_t bcast[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
proto_field_set_default_bytes(lower, ETH_DST_ADDR, bcast);
- proto_field_set_default_be16(lower, ETH_TYPE, ETH_P_ARP);
}
proto_header_fields_add(hdr, arp_fields, array_size(arp_fields));