src/libsystemd-network/test-ipv4ll.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 /***
   3   Copyright © 2014 Axis Communications AB. All rights reserved.
   4 ***/
   5
   6 #include <netinet/if_ether.h>
   7 #include <stdio.h>
   8
   9 #include "sd-event.h"
  10 #include "sd-ipv4ll.h"
  11
  12 #include "arp-util.h"
  13 #include "fd-util.h"
  14 #include "in-addr-util.h"
  15 #include "tests.h"
  16
  17 static bool verbose = false;
  18 static bool extended = false;
  19 static int test_fd[2];
  20
  21 static int basic_request_handler_bind = 0;
  22 static int basic_request_handler_stop = 0;
  23 static void* basic_request_handler_userdata = (void*) 0xCABCAB;
  24
  25 static void basic_request_handler(sd_ipv4ll *ll, int event, void *userdata) {
  26         assert_se(userdata == basic_request_handler_userdata);
  27
  28         switch (event) {
  29                 case SD_IPV4LL_EVENT_STOP:
  30                         basic_request_handler_stop = 1;
  31                         break;
  32                 case SD_IPV4LL_EVENT_BIND:
  33                         basic_request_handler_bind = 1;
  34                         break;
  35                 default:
  36                         assert_se(0);
  37         }
  38 }
  39
  40 int arp_send_packet(
  41                 int fd,
  42                 int ifindex,
  43                 const struct in_addr *pa,
  44                 const struct ether_addr *ha,
  45                 bool announce) {
  46
  47         struct ether_arp ea = {};
  48
  49         assert_se(fd >= 0);
  50         assert_se(ifindex > 0);
  51         assert_se(pa);
  52         assert_se(ha);
  53
  54         if (send(fd, &ea, sizeof(struct ether_arp), 0) < 0)
  55                 return -errno;
  56
  57         return 0;
  58 }
  59
  60 int arp_update_filter(int fd, const struct in_addr *a, const struct ether_addr *eth_mac) {
  61         return 0;
  62 }
  63
  64 int arp_network_bind_raw_socket(int ifindex, const struct in_addr *a, const struct ether_addr *eth_mac) {
  65         if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
  66                 return -errno;
  67
  68         return test_fd[0];
  69 }
  70
  71 static void test_public_api_setters(sd_event *e) {
  72         struct in_addr address = {};
  73         uint64_t seed = 0;
  74         sd_ipv4ll *ll;
  75         struct ether_addr mac_addr = {
  76                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
  77
  78         if (verbose)
  79                 printf("* %s\n", __func__);
  80
  81         assert_se(sd_ipv4ll_new(&ll) == 0);
  82         assert_se(ll);
  83
  84         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_attach_event(NULL, NULL, 0) == -EINVAL);
  85         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
  86         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_attach_event(ll, e, 0) == -EBUSY);
  87
  88         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_callback(NULL, NULL, NULL) == -EINVAL);
  89         assert_se(sd_ipv4ll_set_callback(ll, NULL, NULL) == 0);
  90
  91         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
  92         address.s_addr |= htobe32(169U << 24 | 254U << 16);
  93         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
  94         address.s_addr |= htobe32(0x00FF);
  95         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
  96         address.s_addr |= htobe32(0xF000);
  97         assert_se(sd_ipv4ll_set_address(ll, &address) == 0);
  98         address.s_addr |= htobe32(0x0F00);
  99         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 100
 101         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_address_seed(NULL, seed) == -EINVAL);
 102         assert_se(sd_ipv4ll_set_address_seed(ll, seed) == 0);
 103
 104         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_mac(NULL, NULL) == -EINVAL);
 105
 106         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_mac(ll, NULL) == -EINVAL);
 107         assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
 108
 109         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_ifindex(NULL, -1) == -EINVAL);
 110         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_ifindex(ll, -1) == -EINVAL);
 111         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_set_ifindex(ll, -99) == -EINVAL);
 112         assert_se(sd_ipv4ll_set_ifindex(ll, 1) == 0);
 113
 114         assert_se(sd_ipv4ll_ref(ll) == ll);
 115         assert_se(sd_ipv4ll_unref(ll) == NULL);
 116
 117         /* Cleanup */
 118         assert_se(sd_ipv4ll_unref(ll) == NULL);
 119 }
 120
 121 static void test_basic_request(sd_event *e, const struct in_addr *start_address) {
 122
 123         sd_ipv4ll *ll;
 124         struct ether_arp arp;
 125         struct ether_addr mac_addr = {
 126                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
 127
 128         if (verbose)
 129                 printf("* %s\n", __func__);
 130
 131         assert_se(sd_ipv4ll_new(&ll) == 0);
 132         if (in4_addr_is_set(start_address))
 133                 assert_se(sd_ipv4ll_set_address(ll, start_address) >= 0);
 134         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_start(ll) == -EINVAL);
 135
 136         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
 137         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_start(ll) == -EINVAL);
 138
 139         assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
 140         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_start(ll) == -EINVAL);
 141
 142         assert_se(sd_ipv4ll_set_callback(ll, basic_request_handler,
 143                                          basic_request_handler_userdata) == 0);
 144         ASSERT_RETURN_EXPECTED_SE(sd_ipv4ll_start(ll) == -EINVAL);
 145
 146         assert_se(sd_ipv4ll_set_ifindex(ll, 1) == 0);
 147         assert_se(sd_ipv4ll_start(ll) == 1);
 148
 149         sd_event_run(e, UINT64_MAX);
 150         assert_se(sd_ipv4ll_start(ll) == 0);
 151
 152         assert_se(sd_ipv4ll_is_running(ll));
 153
 154         /* PROBE */
 155         sd_event_run(e, UINT64_MAX);
 156         assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 157
 158         if (extended) {
 159                 /* PROBE */
 160                 sd_event_run(e, UINT64_MAX);
 161                 assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 162
 163                 /* PROBE */
 164                 sd_event_run(e, UINT64_MAX);
 165                 assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 166
 167                 sd_event_run(e, UINT64_MAX);
 168                 assert_se(basic_request_handler_bind == 1);
 169
 170                 if (in4_addr_is_set(start_address)) {
 171                         struct in_addr address;
 172
 173                         assert_se(sd_ipv4ll_get_address(ll, &address) >= 0);
 174                         assert_se(start_address->s_addr == address.s_addr);
 175                 }
 176         }
 177
 178         sd_ipv4ll_stop(ll);
 179         assert_se(basic_request_handler_stop == 1);
 180
 181         /* Cleanup */
 182         assert_se(sd_ipv4ll_unref(ll) == NULL);
 183         safe_close(test_fd[1]);
 184 }
 185
 186 int main(int argc, char *argv[]) {
 187         struct in_addr start_address = {};
 188         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
 189
 190         test_setup_logging(LOG_DEBUG);
 191
 192         assert_se(sd_event_new(&e) >= 0);
 193
 194         test_public_api_setters(e);
 195         test_basic_request(e, &start_address);
 196
 197         basic_request_handler_bind = 0;
 198         basic_request_handler_stop = 0;
 199         start_address.s_addr = htobe32(169U << 24 | 254U << 16 | 1U << 8 | 2U);
 200         test_basic_request(e, &start_address);
 201
 202         return 0;
 203 }