linux/samples/bpf/sockex2_user.c
Joe Stringer 9899694a7f samples/bpf: Move open_raw_sock to separate header
This function was declared in libbpf.c and was the only remaining
function in this library, but has nothing to do with BPF. Shift it out
into a new header, sock_example.h, and include it from the relevant
samples.

Signed-off-by: Joe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20161209024620.31660-8-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-12-20 12:00:40 -03:00

54 lines
1.1 KiB
C

#include <stdio.h>
#include <assert.h>
#include <linux/bpf.h>
#include "libbpf.h"
#include "bpf_load.h"
#include "sock_example.h"
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/resource.h>
struct pair {
__u64 packets;
__u64 bytes;
};
int main(int ac, char **argv)
{
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
char filename[256];
FILE *f;
int i, sock;
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
setrlimit(RLIMIT_MEMLOCK, &r);
if (load_bpf_file(filename)) {
printf("%s", bpf_log_buf);
return 1;
}
sock = open_raw_sock("lo");
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
sizeof(prog_fd[0])) == 0);
f = popen("ping -c5 localhost", "r");
(void) f;
for (i = 0; i < 5; i++) {
int key = 0, next_key;
struct pair value;
while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
bpf_map_lookup_elem(map_fd[0], &next_key, &value);
printf("ip %s bytes %lld packets %lld\n",
inet_ntoa((struct in_addr){htonl(next_key)}),
value.bytes, value.packets);
key = next_key;
}
sleep(1);
}
return 0;
}