1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
2530b2c86SAlexei Starovoitov #include <stdio.h>
3530b2c86SAlexei Starovoitov #include <assert.h>
42bf3e2efSJakub Kicinski #include <bpf/bpf.h>
5bc1a8597SDaniel T. Lee #include <bpf/libbpf.h>
69899694aSJoe Stringer #include "sock_example.h"
7530b2c86SAlexei Starovoitov #include <unistd.h>
8530b2c86SAlexei Starovoitov #include <arpa/inet.h>
9530b2c86SAlexei Starovoitov
1032c00979SPrashant Bhole struct flow_key_record {
11530b2c86SAlexei Starovoitov __be32 src;
12530b2c86SAlexei Starovoitov __be32 dst;
13530b2c86SAlexei Starovoitov union {
14530b2c86SAlexei Starovoitov __be32 ports;
15530b2c86SAlexei Starovoitov __be16 port16[2];
16530b2c86SAlexei Starovoitov };
17530b2c86SAlexei Starovoitov __u32 ip_proto;
18530b2c86SAlexei Starovoitov };
19530b2c86SAlexei Starovoitov
20530b2c86SAlexei Starovoitov struct pair {
21530b2c86SAlexei Starovoitov __u64 packets;
22530b2c86SAlexei Starovoitov __u64 bytes;
23530b2c86SAlexei Starovoitov };
24530b2c86SAlexei Starovoitov
main(int argc,char ** argv)25530b2c86SAlexei Starovoitov int main(int argc, char **argv)
26530b2c86SAlexei Starovoitov {
27*e5659e4eSRong Tao int i, sock, fd, main_prog_fd, hash_map_fd;
28bc1a8597SDaniel T. Lee struct bpf_program *prog;
29bc1a8597SDaniel T. Lee struct bpf_object *obj;
30530b2c86SAlexei Starovoitov char filename[256];
31530b2c86SAlexei Starovoitov FILE *f;
32530b2c86SAlexei Starovoitov
33530b2c86SAlexei Starovoitov snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
34530b2c86SAlexei Starovoitov
35bc1a8597SDaniel T. Lee obj = bpf_object__open_file(filename, NULL);
36bc1a8597SDaniel T. Lee if (libbpf_get_error(obj)) {
37bc1a8597SDaniel T. Lee fprintf(stderr, "ERROR: opening BPF object file failed\n");
38bc1a8597SDaniel T. Lee return 0;
39530b2c86SAlexei Starovoitov }
40530b2c86SAlexei Starovoitov
41bc1a8597SDaniel T. Lee /* load BPF program */
42bc1a8597SDaniel T. Lee if (bpf_object__load(obj)) {
43bc1a8597SDaniel T. Lee fprintf(stderr, "ERROR: loading BPF object file failed\n");
44bc1a8597SDaniel T. Lee goto cleanup;
45bc1a8597SDaniel T. Lee }
46bc1a8597SDaniel T. Lee
47bc1a8597SDaniel T. Lee hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
48*e5659e4eSRong Tao if (hash_map_fd < 0) {
49bc1a8597SDaniel T. Lee fprintf(stderr, "ERROR: finding a map in obj file failed\n");
50bc1a8597SDaniel T. Lee goto cleanup;
51bc1a8597SDaniel T. Lee }
52bc1a8597SDaniel T. Lee
53*e5659e4eSRong Tao /* find BPF main program */
54*e5659e4eSRong Tao main_prog_fd = 0;
55bc1a8597SDaniel T. Lee bpf_object__for_each_program(prog, obj) {
56bc1a8597SDaniel T. Lee fd = bpf_program__fd(prog);
57bc1a8597SDaniel T. Lee
58*e5659e4eSRong Tao if (!strcmp(bpf_program__name(prog), "main_prog"))
59*e5659e4eSRong Tao main_prog_fd = fd;
60bc1a8597SDaniel T. Lee }
61bc1a8597SDaniel T. Lee
62*e5659e4eSRong Tao if (main_prog_fd == 0) {
63*e5659e4eSRong Tao fprintf(stderr, "ERROR: can't find main_prog\n");
64*e5659e4eSRong Tao goto cleanup;
65bc1a8597SDaniel T. Lee }
66a8744f25SMartin KaFai Lau
67530b2c86SAlexei Starovoitov sock = open_raw_sock("lo");
68530b2c86SAlexei Starovoitov
69bc1a8597SDaniel T. Lee /* attach BPF program to socket */
70bc1a8597SDaniel T. Lee assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd,
71530b2c86SAlexei Starovoitov sizeof(__u32)) == 0);
72530b2c86SAlexei Starovoitov
73530b2c86SAlexei Starovoitov if (argc > 1)
745c3cf87dSJakub Kicinski f = popen("ping -4 -c5 localhost", "r");
75530b2c86SAlexei Starovoitov else
76530b2c86SAlexei Starovoitov f = popen("netperf -l 4 localhost", "r");
77530b2c86SAlexei Starovoitov (void) f;
78530b2c86SAlexei Starovoitov
79530b2c86SAlexei Starovoitov for (i = 0; i < 5; i++) {
8032c00979SPrashant Bhole struct flow_key_record key = {}, next_key;
81530b2c86SAlexei Starovoitov struct pair value;
82530b2c86SAlexei Starovoitov
83530b2c86SAlexei Starovoitov sleep(1);
84530b2c86SAlexei Starovoitov printf("IP src.port -> dst.port bytes packets\n");
85bc1a8597SDaniel T. Lee while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) {
86bc1a8597SDaniel T. Lee bpf_map_lookup_elem(hash_map_fd, &next_key, &value);
87530b2c86SAlexei Starovoitov printf("%s.%05d -> %s.%05d %12lld %12lld\n",
88530b2c86SAlexei Starovoitov inet_ntoa((struct in_addr){htonl(next_key.src)}),
89530b2c86SAlexei Starovoitov next_key.port16[0],
90530b2c86SAlexei Starovoitov inet_ntoa((struct in_addr){htonl(next_key.dst)}),
91530b2c86SAlexei Starovoitov next_key.port16[1],
92530b2c86SAlexei Starovoitov value.bytes, value.packets);
93530b2c86SAlexei Starovoitov key = next_key;
94530b2c86SAlexei Starovoitov }
95530b2c86SAlexei Starovoitov }
96bc1a8597SDaniel T. Lee
97bc1a8597SDaniel T. Lee cleanup:
98bc1a8597SDaniel T. Lee bpf_object__close(obj);
99530b2c86SAlexei Starovoitov return 0;
100530b2c86SAlexei Starovoitov }
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