io_uring: pass required context in as flags
[linux-2.6-microblaze.git] / samples / bpf / sockex3_user.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 #include <assert.h>
4 #include <bpf/bpf.h>
5 #include <bpf/libbpf.h>
6 #include "sock_example.h"
7 #include <unistd.h>
8 #include <arpa/inet.h>
9 #include <sys/resource.h>
10
11 struct 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
21 struct pair {
22         __u64 packets;
23         __u64 bytes;
24 };
25
26 int main(int argc, char **argv)
27 {
28         int i, sock, key, fd, main_prog_fd, jmp_table_fd, hash_map_fd;
29         struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
30         struct bpf_program *prog;
31         struct bpf_object *obj;
32         const char *section;
33         char filename[256];
34         FILE *f;
35
36         snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
37         setrlimit(RLIMIT_MEMLOCK, &r);
38
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;
43         }
44
45         /* load BPF program */
46         if (bpf_object__load(obj)) {
47                 fprintf(stderr, "ERROR: loading BPF object file failed\n");
48                 goto cleanup;
49         }
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                 section = bpf_program__section_name(prog);
62                 if (sscanf(section, "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
73         sock = open_raw_sock("lo");
74
75         /* attach BPF program to socket */
76         assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd,
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");
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);
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
103 cleanup:
104         bpf_object__close(obj);
105         return 0;
106 }