diff options
Diffstat (limited to 'test/bpf/t1.c')
| -rw-r--r-- | test/bpf/t1.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/test/bpf/t1.c b/test/bpf/t1.c index 60f9434a..3364b4f1 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; |