blob: cd6fa79df900729e41d2f18301893f09e5df8ade [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Alexei Starovoitov530b2c82015-05-19 16:59:06 -07002#include <stdio.h>
3#include <assert.h>
Jakub Kicinski2bf3e2e2018-05-14 22:35:02 -07004#include <bpf/bpf.h>
Daniel T. Leebc1a8592020-05-16 13:06:06 +09005#include <bpf/libbpf.h>
Joe Stringer98996942016-12-08 18:46:20 -08006#include "sock_example.h"
Alexei Starovoitov530b2c82015-05-19 16:59:06 -07007#include <unistd.h>
8#include <arpa/inet.h>
9
Prashant Bhole32c00972018-09-20 16:52:03 +090010struct flow_key_record {
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070011 __be32 src;
12 __be32 dst;
13 union {
14 __be32 ports;
15 __be16 port16[2];
16 };
17 __u32 ip_proto;
18};
19
20struct pair {
21 __u64 packets;
22 __u64 bytes;
23};
24
25int main(int argc, char **argv)
26{
Daniel T. Leebc1a8592020-05-16 13:06:06 +090027 int i, sock, key, fd, main_prog_fd, jmp_table_fd, hash_map_fd;
Daniel T. Leebc1a8592020-05-16 13:06:06 +090028 struct bpf_program *prog;
29 struct bpf_object *obj;
Daniel T. Lee698584d2020-09-04 15:34:33 +090030 const char *section;
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070031 char filename[256];
32 FILE *f;
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070033
34 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070035
Daniel T. Leebc1a8592020-05-16 13:06:06 +090036 obj = bpf_object__open_file(filename, NULL);
37 if (libbpf_get_error(obj)) {
38 fprintf(stderr, "ERROR: opening BPF object file failed\n");
39 return 0;
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070040 }
41
Daniel T. Leebc1a8592020-05-16 13:06:06 +090042 /* load BPF program */
43 if (bpf_object__load(obj)) {
44 fprintf(stderr, "ERROR: loading BPF object file failed\n");
45 goto cleanup;
46 }
47
48 jmp_table_fd = bpf_object__find_map_fd_by_name(obj, "jmp_table");
49 hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
50 if (jmp_table_fd < 0 || hash_map_fd < 0) {
51 fprintf(stderr, "ERROR: finding a map in obj file failed\n");
52 goto cleanup;
53 }
54
55 bpf_object__for_each_program(prog, obj) {
56 fd = bpf_program__fd(prog);
57
Daniel T. Lee698584d2020-09-04 15:34:33 +090058 section = bpf_program__section_name(prog);
59 if (sscanf(section, "socket/%d", &key) != 1) {
Daniel T. Leebc1a8592020-05-16 13:06:06 +090060 fprintf(stderr, "ERROR: finding prog failed\n");
61 goto cleanup;
62 }
63
64 if (key == 0)
65 main_prog_fd = fd;
66 else
67 bpf_map_update_elem(jmp_table_fd, &key, &fd, BPF_ANY);
68 }
Martin KaFai Laua8744f22017-06-27 23:08:35 -070069
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070070 sock = open_raw_sock("lo");
71
Daniel T. Leebc1a8592020-05-16 13:06:06 +090072 /* attach BPF program to socket */
73 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd,
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070074 sizeof(__u32)) == 0);
75
76 if (argc > 1)
Jakub Kicinski5c3cf872019-02-27 19:04:10 -080077 f = popen("ping -4 -c5 localhost", "r");
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070078 else
79 f = popen("netperf -l 4 localhost", "r");
80 (void) f;
81
82 for (i = 0; i < 5; i++) {
Prashant Bhole32c00972018-09-20 16:52:03 +090083 struct flow_key_record key = {}, next_key;
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070084 struct pair value;
85
86 sleep(1);
87 printf("IP src.port -> dst.port bytes packets\n");
Daniel T. Leebc1a8592020-05-16 13:06:06 +090088 while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) {
89 bpf_map_lookup_elem(hash_map_fd, &next_key, &value);
Alexei Starovoitov530b2c82015-05-19 16:59:06 -070090 printf("%s.%05d -> %s.%05d %12lld %12lld\n",
91 inet_ntoa((struct in_addr){htonl(next_key.src)}),
92 next_key.port16[0],
93 inet_ntoa((struct in_addr){htonl(next_key.dst)}),
94 next_key.port16[1],
95 value.bytes, value.packets);
96 key = next_key;
97 }
98 }
Daniel T. Leebc1a8592020-05-16 13:06:06 +090099
100cleanup:
101 bpf_object__close(obj);
Alexei Starovoitov530b2c82015-05-19 16:59:06 -0700102 return 0;
103}