64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <stdio.h>
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#include <assert.h>
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#include <linux/bpf.h>
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#include <bpf/bpf.h>
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#include <bpf/libbpf.h>
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#include "sock_example.h"
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#include <unistd.h>
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#include <arpa/inet.h>
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int main(int ac, char **argv)
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{
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struct bpf_object *obj;
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struct bpf_program *prog;
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int map_fd, prog_fd;
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char filename[256];
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int i, sock, err;
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FILE *f;
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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obj = bpf_object__open_file(filename, NULL);
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if (libbpf_get_error(obj))
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return 1;
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prog = bpf_object__next_program(obj, NULL);
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bpf_program__set_type(prog, BPF_PROG_TYPE_SOCKET_FILTER);
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err = bpf_object__load(obj);
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if (err)
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return 1;
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prog_fd = bpf_program__fd(prog);
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map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
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sock = open_raw_sock("lo");
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assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd,
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sizeof(prog_fd)) == 0);
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f = popen("ping -4 -c5 localhost", "r");
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(void) f;
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for (i = 0; i < 5; i++) {
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long long tcp_cnt, udp_cnt, icmp_cnt;
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int key;
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key = IPPROTO_TCP;
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assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0);
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key = IPPROTO_UDP;
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assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0);
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key = IPPROTO_ICMP;
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assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0);
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printf("TCP %lld UDP %lld ICMP %lld bytes\n",
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tcp_cnt, udp_cnt, icmp_cnt);
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sleep(1);
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}
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return 0;
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}
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