mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
5c3cf87d47
ping localhost may default of IPv6 on modern systems, but samples are trying to only parse IPv4. Force IPv4. samples/bpf/tracex1_user.c doesn't interpret the packet so we don't care which IP version will be used there. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf.h>
|
|
#include "bpf_load.h"
|
|
#include "sock_example.h"
|
|
#include <unistd.h>
|
|
#include <arpa/inet.h>
|
|
#include <sys/resource.h>
|
|
|
|
#define PARSE_IP 3
|
|
#define PARSE_IP_PROG_FD (prog_fd[0])
|
|
#define PROG_ARRAY_FD (map_fd[0])
|
|
|
|
struct flow_key_record {
|
|
__be32 src;
|
|
__be32 dst;
|
|
union {
|
|
__be32 ports;
|
|
__be16 port16[2];
|
|
};
|
|
__u32 ip_proto;
|
|
};
|
|
|
|
struct pair {
|
|
__u64 packets;
|
|
__u64 bytes;
|
|
};
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
|
char filename[256];
|
|
FILE *f;
|
|
int i, sock, err, id, key = PARSE_IP;
|
|
struct bpf_prog_info info = {};
|
|
uint32_t info_len = sizeof(info);
|
|
|
|
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;
|
|
}
|
|
|
|
/* Test fd array lookup which returns the id of the bpf_prog */
|
|
err = bpf_obj_get_info_by_fd(PARSE_IP_PROG_FD, &info, &info_len);
|
|
assert(!err);
|
|
err = bpf_map_lookup_elem(PROG_ARRAY_FD, &key, &id);
|
|
assert(!err);
|
|
assert(id == info.id);
|
|
|
|
sock = open_raw_sock("lo");
|
|
|
|
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],
|
|
sizeof(__u32)) == 0);
|
|
|
|
if (argc > 1)
|
|
f = popen("ping -4 -c5 localhost", "r");
|
|
else
|
|
f = popen("netperf -l 4 localhost", "r");
|
|
(void) f;
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
struct flow_key_record key = {}, next_key;
|
|
struct pair value;
|
|
|
|
sleep(1);
|
|
printf("IP src.port -> dst.port bytes packets\n");
|
|
while (bpf_map_get_next_key(map_fd[2], &key, &next_key) == 0) {
|
|
bpf_map_lookup_elem(map_fd[2], &next_key, &value);
|
|
printf("%s.%05d -> %s.%05d %12lld %12lld\n",
|
|
inet_ntoa((struct in_addr){htonl(next_key.src)}),
|
|
next_key.port16[0],
|
|
inet_ntoa((struct in_addr){htonl(next_key.dst)}),
|
|
next_key.port16[1],
|
|
value.bytes, value.packets);
|
|
key = next_key;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|