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-rw-r--r--test/bpf/t1.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/test/bpf/t1.c b/test/bpf/t1.c
index 60f9434..3364b4f 100644
--- a/test/bpf/t1.c
+++ b/test/bpf/t1.c
@@ -20,32 +20,36 @@
* (011) ret #1
* (012) ret #0
*
- * To compile:
- * clang -O2 -target bpf -c t1.c
+ * To compile on x86:
+ * clang -O2 -U __GNUC__ -target bpf -c t1.c
+ *
+ * To compile on ARM:
+ * clang -O2 -I/usr/include/aarch64-linux-gnu/ -target bpf -c t1.c
*/
#include <stdint.h>
#include <net/ethernet.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
+#include <arpa/inet.h>
uint64_t
entry(void *pkt)
{
struct ether_header *ether_header = (void *)pkt;
- if (ether_header->ether_type != __builtin_bswap16(0x0800))
+ if (ether_header->ether_type != htons(0x0800))
return 0;
struct iphdr *iphdr = (void *)(ether_header + 1);
if (iphdr->protocol != 17 || (iphdr->frag_off & 0x1ffff) != 0 ||
- iphdr->daddr != __builtin_bswap32(0x1020304))
+ iphdr->daddr != htonl(0x1020304))
return 0;
int hlen = iphdr->ihl * 4;
struct udphdr *udphdr = (void *)iphdr + hlen;
- if (udphdr->dest != __builtin_bswap16(5000))
+ if (udphdr->dest != htons(5000))
return 0;
return 1;