134 строки
3.2 KiB
C
134 строки
3.2 KiB
C
/*
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* Copyright (c) 2017 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <stdint.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <bpf/bpf.h>
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#include "bpf_load.h"
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#define PORT_A (map_fd[0])
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#define PORT_H (map_fd[1])
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#define REG_RESULT_H (map_fd[2])
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#define INLINE_RESULT_H (map_fd[3])
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#define A_OF_PORT_A (map_fd[4]) /* Test case #0 */
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#define H_OF_PORT_A (map_fd[5]) /* Test case #1 */
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#define H_OF_PORT_H (map_fd[6]) /* Test case #2 */
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static const char * const test_names[] = {
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"Array of Array",
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"Hash of Array",
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"Hash of Hash",
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};
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#define NR_TESTS (sizeof(test_names) / sizeof(*test_names))
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static void check_map_id(int inner_map_fd, int map_in_map_fd, uint32_t key)
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{
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struct bpf_map_info info = {};
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uint32_t info_len = sizeof(info);
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int ret, id;
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ret = bpf_obj_get_info_by_fd(inner_map_fd, &info, &info_len);
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assert(!ret);
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ret = bpf_map_lookup_elem(map_in_map_fd, &key, &id);
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assert(!ret);
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assert(id == info.id);
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}
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static void populate_map(uint32_t port_key, int magic_result)
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{
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int ret;
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ret = bpf_map_update_elem(PORT_A, &port_key, &magic_result, BPF_ANY);
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assert(!ret);
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ret = bpf_map_update_elem(PORT_H, &port_key, &magic_result,
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BPF_NOEXIST);
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assert(!ret);
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ret = bpf_map_update_elem(A_OF_PORT_A, &port_key, &PORT_A, BPF_ANY);
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assert(!ret);
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check_map_id(PORT_A, A_OF_PORT_A, port_key);
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ret = bpf_map_update_elem(H_OF_PORT_A, &port_key, &PORT_A, BPF_NOEXIST);
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assert(!ret);
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check_map_id(PORT_A, H_OF_PORT_A, port_key);
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ret = bpf_map_update_elem(H_OF_PORT_H, &port_key, &PORT_H, BPF_NOEXIST);
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assert(!ret);
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check_map_id(PORT_H, H_OF_PORT_H, port_key);
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}
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static void test_map_in_map(void)
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{
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struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 };
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uint32_t result_key = 0, port_key;
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int result, inline_result;
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int magic_result = 0xfaceb00c;
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int ret;
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int i;
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port_key = rand() & 0x00FF;
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populate_map(port_key, magic_result);
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in6.sin6_addr.s6_addr16[0] = 0xdead;
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in6.sin6_addr.s6_addr16[1] = 0xbeef;
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in6.sin6_port = port_key;
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for (i = 0; i < NR_TESTS; i++) {
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printf("%s: ", test_names[i]);
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in6.sin6_addr.s6_addr16[7] = i;
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ret = connect(-1, (struct sockaddr *)&in6, sizeof(in6));
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assert(ret == -1 && errno == EBADF);
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ret = bpf_map_lookup_elem(REG_RESULT_H, &result_key, &result);
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assert(!ret);
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ret = bpf_map_lookup_elem(INLINE_RESULT_H, &result_key,
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&inline_result);
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assert(!ret);
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if (result != magic_result || inline_result != magic_result) {
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printf("Error. result:%d inline_result:%d\n",
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result, inline_result);
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exit(1);
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}
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bpf_map_delete_elem(REG_RESULT_H, &result_key);
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bpf_map_delete_elem(INLINE_RESULT_H, &result_key);
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printf("Pass\n");
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}
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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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assert(!setrlimit(RLIMIT_MEMLOCK, &r));
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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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_map_in_map();
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return 0;
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}
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