diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /samples/bpf/sockex3_user.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'samples/bpf/sockex3_user.c')
-rw-r--r-- | samples/bpf/sockex3_user.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c new file mode 100644 index 0000000000..56044acbd2 --- /dev/null +++ b/samples/bpf/sockex3_user.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <stdio.h> +#include <assert.h> +#include <bpf/bpf.h> +#include <bpf/libbpf.h> +#include "sock_example.h" +#include <unistd.h> +#include <arpa/inet.h> + +struct flow_key_record { + __be32 src; + __be32 dst; + union { + __be32 ports; + __be16 port16[2]; + }; + __u32 ip_proto; +}; + +struct pair { + __u64 packets; + __u64 bytes; +}; + +int main(int argc, char **argv) +{ + int i, sock, fd, main_prog_fd, hash_map_fd; + struct bpf_program *prog; + struct bpf_object *obj; + char filename[256]; + FILE *f; + + snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + + obj = bpf_object__open_file(filename, NULL); + if (libbpf_get_error(obj)) { + fprintf(stderr, "ERROR: opening BPF object file failed\n"); + return 0; + } + + /* load BPF program */ + if (bpf_object__load(obj)) { + fprintf(stderr, "ERROR: loading BPF object file failed\n"); + goto cleanup; + } + + hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map"); + if (hash_map_fd < 0) { + fprintf(stderr, "ERROR: finding a map in obj file failed\n"); + goto cleanup; + } + + /* find BPF main program */ + main_prog_fd = 0; + bpf_object__for_each_program(prog, obj) { + fd = bpf_program__fd(prog); + + if (!strcmp(bpf_program__name(prog), "main_prog")) + main_prog_fd = fd; + } + + if (main_prog_fd == 0) { + fprintf(stderr, "ERROR: can't find main_prog\n"); + goto cleanup; + } + + sock = open_raw_sock("lo"); + + /* attach BPF program to socket */ + assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd, + sizeof(__u32)) == 0); + + if (argc > 1) + f = popen("ping -4 -c5 localhost", "r"); + else + f = popen("netperf -l 4 localhost", "r"); + (void) f; + + for (i = 0; i < 5; i++) { + struct flow_key_record key = {}, next_key; + struct pair value; + + sleep(1); + printf("IP src.port -> dst.port bytes packets\n"); + while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) { + bpf_map_lookup_elem(hash_map_fd, &next_key, &value); + printf("%s.%05d -> %s.%05d %12lld %12lld\n", + inet_ntoa((struct in_addr){htonl(next_key.src)}), + next_key.port16[0], + inet_ntoa((struct in_addr){htonl(next_key.dst)}), + next_key.port16[1], + value.bytes, value.packets); + key = next_key; + } + } + +cleanup: + bpf_object__close(obj); + return 0; +} |