1 // SPDX-License-Identifier: GPL-2.0
7 #include "sock_example.h"
10 #include <sys/resource.h>
13 #define PARSE_IP_PROG_FD (prog_fd[0])
14 #define PROG_ARRAY_FD (map_fd[0])
16 struct bpf_flow_keys {
31 int main(int argc, char **argv)
33 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
36 int i, sock, err, id, key = PARSE_IP;
37 struct bpf_prog_info info = {};
38 uint32_t info_len = sizeof(info);
40 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
41 setrlimit(RLIMIT_MEMLOCK, &r);
43 if (load_bpf_file(filename)) {
44 printf("%s", bpf_log_buf);
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);
51 err = bpf_map_lookup_elem(PROG_ARRAY_FD, &key, &id);
53 assert(id == info.id);
55 sock = open_raw_sock("lo");
57 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],
61 f = popen("ping -c5 localhost", "r");
63 f = popen("netperf -l 4 localhost", "r");
66 for (i = 0; i < 5; i++) {
67 struct bpf_flow_keys key = {}, next_key;
71 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);
74 printf("%s.%05d -> %s.%05d %12lld %12lld\n",
75 inet_ntoa((struct in_addr){htonl(next_key.src)}),
77 inet_ntoa((struct in_addr){htonl(next_key.dst)}),
79 value.bytes, value.packets);