sockex3_user.c (597473720f4dc69749542bfcfed4a927a43d935e) sockex3_user.c (bc1a85977b950407d67cd1e5b74f261a4bee3284)
1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <assert.h>
1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <assert.h>
4#include <linux/bpf.h>
5#include <bpf/bpf.h>
4#include <bpf/bpf.h>
6#include "bpf_load.h"
5#include <bpf/libbpf.h>
7#include "sock_example.h"
8#include <unistd.h>
9#include <arpa/inet.h>
10#include <sys/resource.h>
11
6#include "sock_example.h"
7#include <unistd.h>
8#include <arpa/inet.h>
9#include <sys/resource.h>
10
12#define PARSE_IP 3
13#define PARSE_IP_PROG_FD (prog_fd[0])
14#define PROG_ARRAY_FD (map_fd[0])
15
16struct flow_key_record {
17 __be32 src;
18 __be32 dst;
19 union {
20 __be32 ports;
21 __be16 port16[2];
22 };
23 __u32 ip_proto;
24};
25
26struct pair {
27 __u64 packets;
28 __u64 bytes;
29};
30
31int main(int argc, char **argv)
32{
11struct flow_key_record {
12 __be32 src;
13 __be32 dst;
14 union {
15 __be32 ports;
16 __be16 port16[2];
17 };
18 __u32 ip_proto;
19};
20
21struct pair {
22 __u64 packets;
23 __u64 bytes;
24};
25
26int main(int argc, char **argv)
27{
28 int i, sock, key, fd, main_prog_fd, jmp_table_fd, hash_map_fd;
33 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
29 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
30 struct bpf_program *prog;
31 struct bpf_object *obj;
34 char filename[256];
32 char filename[256];
33 const char *title;
35 FILE *f;
34 FILE *f;
36 int i, sock, err, id, key = PARSE_IP;
37 struct bpf_prog_info info = {};
38 uint32_t info_len = sizeof(info);
39
40 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
41 setrlimit(RLIMIT_MEMLOCK, &r);
42
35
36 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
37 setrlimit(RLIMIT_MEMLOCK, &r);
38
43 if (load_bpf_file(filename)) {
44 printf("%s", bpf_log_buf);
45 return 1;
39 obj = bpf_object__open_file(filename, NULL);
40 if (libbpf_get_error(obj)) {
41 fprintf(stderr, "ERROR: opening BPF object file failed\n");
42 return 0;
46 }
47
43 }
44
48 /* Test fd array lookup which returns the id of the bpf_prog */
49 err = bpf_obj_get_info_by_fd(PARSE_IP_PROG_FD, &info, &info_len);
50 assert(!err);
51 err = bpf_map_lookup_elem(PROG_ARRAY_FD, &key, &id);
52 assert(!err);
53 assert(id == info.id);
45 /* load BPF program */
46 if (bpf_object__load(obj)) {
47 fprintf(stderr, "ERROR: loading BPF object file failed\n");
48 goto cleanup;
49 }
54
50
51 jmp_table_fd = bpf_object__find_map_fd_by_name(obj, "jmp_table");
52 hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
53 if (jmp_table_fd < 0 || hash_map_fd < 0) {
54 fprintf(stderr, "ERROR: finding a map in obj file failed\n");
55 goto cleanup;
56 }
57
58 bpf_object__for_each_program(prog, obj) {
59 fd = bpf_program__fd(prog);
60
61 title = bpf_program__title(prog, false);
62 if (sscanf(title, "socket/%d", &key) != 1) {
63 fprintf(stderr, "ERROR: finding prog failed\n");
64 goto cleanup;
65 }
66
67 if (key == 0)
68 main_prog_fd = fd;
69 else
70 bpf_map_update_elem(jmp_table_fd, &key, &fd, BPF_ANY);
71 }
72
55 sock = open_raw_sock("lo");
56
73 sock = open_raw_sock("lo");
74
57 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],
75 /* attach BPF program to socket */
76 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd,
58 sizeof(__u32)) == 0);
59
60 if (argc > 1)
61 f = popen("ping -4 -c5 localhost", "r");
62 else
63 f = popen("netperf -l 4 localhost", "r");
64 (void) f;
65
66 for (i = 0; i < 5; i++) {
67 struct flow_key_record key = {}, next_key;
68 struct pair value;
69
70 sleep(1);
71 printf("IP src.port -> dst.port bytes packets\n");
77 sizeof(__u32)) == 0);
78
79 if (argc > 1)
80 f = popen("ping -4 -c5 localhost", "r");
81 else
82 f = popen("netperf -l 4 localhost", "r");
83 (void) f;
84
85 for (i = 0; i < 5; i++) {
86 struct flow_key_record key = {}, next_key;
87 struct pair value;
88
89 sleep(1);
90 printf("IP src.port -> dst.port bytes packets\n");
72 while (bpf_map_get_next_key(map_fd[2], &key, &next_key) == 0) {
73 bpf_map_lookup_elem(map_fd[2], &next_key, &value);
91 while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) {
92 bpf_map_lookup_elem(hash_map_fd, &next_key, &value);
74 printf("%s.%05d -> %s.%05d %12lld %12lld\n",
75 inet_ntoa((struct in_addr){htonl(next_key.src)}),
76 next_key.port16[0],
77 inet_ntoa((struct in_addr){htonl(next_key.dst)}),
78 next_key.port16[1],
79 value.bytes, value.packets);
80 key = next_key;
81 }
82 }
93 printf("%s.%05d -> %s.%05d %12lld %12lld\n",
94 inet_ntoa((struct in_addr){htonl(next_key.src)}),
95 next_key.port16[0],
96 inet_ntoa((struct in_addr){htonl(next_key.dst)}),
97 next_key.port16[1],
98 value.bytes, value.packets);
99 key = next_key;
100 }
101 }
102
103cleanup:
104 bpf_object__close(obj);
83 return 0;
84}
105 return 0;
106}