forked from Minki/linux
2bf3e2ef42
There are two files in the tree called libbpf.h which is becoming problematic. Most samples don't actually need the local libbpf.h they simply include it to get to bpf/bpf.h. Include bpf/bpf.h directly instead. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
85 lines
1.9 KiB
C
85 lines
1.9 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_load.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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#include <sys/resource.h>
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#define PARSE_IP 3
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#define PARSE_IP_PROG_FD (prog_fd[0])
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#define PROG_ARRAY_FD (map_fd[0])
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struct bpf_flow_keys {
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__be32 src;
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__be32 dst;
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union {
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__be32 ports;
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__be16 port16[2];
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};
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__u32 ip_proto;
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};
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struct pair {
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__u64 packets;
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__u64 bytes;
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};
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int main(int argc, char **argv)
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{
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struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
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char filename[256];
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FILE *f;
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int i, sock, err, id, key = PARSE_IP;
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struct bpf_prog_info info = {};
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uint32_t info_len = sizeof(info);
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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setrlimit(RLIMIT_MEMLOCK, &r);
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if (load_bpf_file(filename)) {
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printf("%s", bpf_log_buf);
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return 1;
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}
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/* Test fd array lookup which returns the id of the bpf_prog */
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err = bpf_obj_get_info_by_fd(PARSE_IP_PROG_FD, &info, &info_len);
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assert(!err);
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err = bpf_map_lookup_elem(PROG_ARRAY_FD, &key, &id);
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assert(!err);
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assert(id == info.id);
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sock = open_raw_sock("lo");
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assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],
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sizeof(__u32)) == 0);
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if (argc > 1)
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f = popen("ping -c5 localhost", "r");
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else
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f = popen("netperf -l 4 localhost", "r");
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(void) f;
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for (i = 0; i < 5; i++) {
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struct bpf_flow_keys key = {}, next_key;
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struct pair value;
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sleep(1);
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printf("IP src.port -> dst.port bytes packets\n");
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while (bpf_map_get_next_key(map_fd[2], &key, &next_key) == 0) {
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bpf_map_lookup_elem(map_fd[2], &next_key, &value);
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printf("%s.%05d -> %s.%05d %12lld %12lld\n",
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inet_ntoa((struct in_addr){htonl(next_key.src)}),
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next_key.port16[0],
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inet_ntoa((struct in_addr){htonl(next_key.dst)}),
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next_key.port16[1],
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value.bytes, value.packets);
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key = next_key;
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}
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}
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return 0;
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}
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