cregit-Linux how code gets into the kernel

Release 4.10 samples/bpf/sockex3_user.c

Directory: samples/bpf
#include <stdio.h>
#include <assert.h>
#include <linux/bpf.h>
#include "libbpf.h"
#include "bpf_load.h"
#include "sock_example.h"
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/resource.h>

struct bpf_flow_keys {
__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) { struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; char filename[256]; FILE *f; int i, sock; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); setrlimit(RLIMIT_MEMLOCK, &r); if (load_bpf_file(filename)) { printf("%s", bpf_log_buf); return 1; } sock = open_raw_sock("lo"); assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4], sizeof(__u32)) == 0); if (argc > 1) f = popen("ping -c5 localhost", "r"); else f = popen("netperf -l 4 localhost", "r"); (void) f; for (i = 0; i < 5; i++) { struct bpf_flow_keys key = {}, next_key; struct pair value; sleep(1); printf("IP src.port -> dst.port bytes packets\n"); while (bpf_map_get_next_key(map_fd[2], &key, &next_key) == 0) { bpf_map_lookup_elem(map_fd[2], &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; } } return 0; }


alexei starovoitovalexei starovoitov25692.42%125.00%
william tuwilliam tu186.50%125.00%
joe stringerjoe stringer20.72%125.00%
naveen n. raonaveen n. rao10.36%125.00%

Overall Contributors

alexei starovoitovalexei starovoitov31491.81%120.00%
william tuwilliam tu216.14%120.00%
joe stringerjoe stringer51.46%240.00%
naveen n. raonaveen n. rao20.58%120.00%
Directory: samples/bpf
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