cregit-Linux how code gets into the kernel

Release 4.7 samples/bpf/sockex2_user.c

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


struct pair {
	
__u64 packets;
	
__u64 bytes;
};


int main(int ac, char **argv) { char filename[256]; FILE *f; int i, sock; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); 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, sizeof(prog_fd[0])) == 0); f = popen("ping -c5 localhost", "r"); (void) f; for (i = 0; i < 5; i++) { int key = 0, next_key; struct pair value; while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) { bpf_lookup_elem(map_fd[0], &next_key, &value); printf("ip %s bytes %lld packets %lld\n", inet_ntoa((struct in_addr){htonl(next_key)}), value.bytes, value.packets); key = next_key; } sleep(1); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
alexei starovoitovalexei starovoitov208100.00%2100.00%
Total208100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
alexei starovoitovalexei starovoitov240100.00%2100.00%
Total240100.00%2100.00%
Directory: samples/bpf
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