diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c b/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c new file mode 100644 index 000000000..fdb4bf440 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c @@ -0,0 +1,26 @@ +#include <linux/bpf.h> + +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_endian.h> + +int _version SEC("version") = 1; + +SEC("sk_msg1") +int bpf_prog1(struct sk_msg_md *msg) +{ + void *data_end = (void *)(long) msg->data_end; + void *data = (void *)(long) msg->data; + + char *d; + + if (data + 8 > data_end) + return SK_DROP; + + bpf_printk("data length %i\n", (__u64)msg->data_end - (__u64)msg->data); + d = (char *)data; + bpf_printk("hello sendmsg hook %i %i\n", d[0], d[1]); + + return SK_PASS; +} + +char _license[] SEC("license") = "GPL"; |