cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sockex3_user.c (2452B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <stdio.h>
      3#include <assert.h>
      4#include <bpf/bpf.h>
      5#include <bpf/libbpf.h>
      6#include "sock_example.h"
      7#include <unistd.h>
      8#include <arpa/inet.h>
      9
     10struct flow_key_record {
     11	__be32 src;
     12	__be32 dst;
     13	union {
     14		__be32 ports;
     15		__be16 port16[2];
     16	};
     17	__u32 ip_proto;
     18};
     19
     20struct pair {
     21	__u64 packets;
     22	__u64 bytes;
     23};
     24
     25int main(int argc, char **argv)
     26{
     27	int i, sock, key, fd, main_prog_fd, jmp_table_fd, hash_map_fd;
     28	struct bpf_program *prog;
     29	struct bpf_object *obj;
     30	const char *section;
     31	char filename[256];
     32	FILE *f;
     33
     34	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
     35
     36	obj = bpf_object__open_file(filename, NULL);
     37	if (libbpf_get_error(obj)) {
     38		fprintf(stderr, "ERROR: opening BPF object file failed\n");
     39		return 0;
     40	}
     41
     42	/* load BPF program */
     43	if (bpf_object__load(obj)) {
     44		fprintf(stderr, "ERROR: loading BPF object file failed\n");
     45		goto cleanup;
     46	}
     47
     48	jmp_table_fd = bpf_object__find_map_fd_by_name(obj, "jmp_table");
     49	hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
     50	if (jmp_table_fd < 0 || hash_map_fd < 0) {
     51		fprintf(stderr, "ERROR: finding a map in obj file failed\n");
     52		goto cleanup;
     53	}
     54
     55	bpf_object__for_each_program(prog, obj) {
     56		fd = bpf_program__fd(prog);
     57
     58		section = bpf_program__section_name(prog);
     59		if (sscanf(section, "socket/%d", &key) != 1) {
     60			fprintf(stderr, "ERROR: finding prog failed\n");
     61			goto cleanup;
     62		}
     63
     64		if (key == 0)
     65			main_prog_fd = fd;
     66		else
     67			bpf_map_update_elem(jmp_table_fd, &key, &fd, BPF_ANY);
     68	}
     69
     70	sock = open_raw_sock("lo");
     71
     72	/* attach BPF program to socket */
     73	assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd,
     74			  sizeof(__u32)) == 0);
     75
     76	if (argc > 1)
     77		f = popen("ping -4 -c5 localhost", "r");
     78	else
     79		f = popen("netperf -l 4 localhost", "r");
     80	(void) f;
     81
     82	for (i = 0; i < 5; i++) {
     83		struct flow_key_record key = {}, next_key;
     84		struct pair value;
     85
     86		sleep(1);
     87		printf("IP     src.port -> dst.port               bytes      packets\n");
     88		while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) {
     89			bpf_map_lookup_elem(hash_map_fd, &next_key, &value);
     90			printf("%s.%05d -> %s.%05d %12lld %12lld\n",
     91			       inet_ntoa((struct in_addr){htonl(next_key.src)}),
     92			       next_key.port16[0],
     93			       inet_ntoa((struct in_addr){htonl(next_key.dst)}),
     94			       next_key.port16[1],
     95			       value.bytes, value.packets);
     96			key = next_key;
     97		}
     98	}
     99
    100cleanup:
    101	bpf_object__close(obj);
    102	return 0;
    103}