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Diffstat (limited to 'samples/bpf/sockex1_kern.c')
-rw-r--r--samples/bpf/sockex1_kern.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/samples/bpf/sockex1_kern.c b/samples/bpf/sockex1_kern.c
index 0668926..ed18e9a 100644
--- a/samples/bpf/sockex1_kern.c
+++ b/samples/bpf/sockex1_kern.c
@@ -1,5 +1,6 @@
#include <uapi/linux/bpf.h>
#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
#include <uapi/linux/ip.h>
#include "bpf_helpers.h"
@@ -11,14 +12,17 @@ struct bpf_map_def SEC("maps") my_map = {
};
SEC("socket1")
-int bpf_prog1(struct sk_buff *skb)
+int bpf_prog1(struct __sk_buff *skb)
{
int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol));
long *value;
+ if (skb->pkt_type != PACKET_OUTGOING)
+ return 0;
+
value = bpf_map_lookup_elem(&my_map, &index);
if (value)
- __sync_fetch_and_add(value, 1);
+ __sync_fetch_and_add(value, skb->len);
return 0;
}
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