src/libsystemd-network/test-ipv4ll.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright (C) 2014 Axis Communications AB. All rights reserved.
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <sys/socket.h>
  24 #include <sys/types.h>
  25 #include <unistd.h>
  26
  27 #include "sd-ipv4ll.h"
  28
  29 #include "arp-util.h"
  30 #include "fd-util.h"
  31 #include "socket-util.h"
  32 #include "util.h"
  33
  34 static bool verbose = false;
  35 static bool extended = false;
  36 static int test_fd[2];
  37
  38 static int basic_request_handler_bind = 0;
  39 static int basic_request_handler_stop = 0;
  40 static void* basic_request_handler_userdata = (void*) 0xCABCAB;
  41
  42 static void basic_request_handler(sd_ipv4ll *ll, int event, void *userdata) {
  43         assert_se(userdata == basic_request_handler_userdata);
  44
  45         switch(event) {
  46                 case SD_IPV4LL_EVENT_STOP:
  47                         basic_request_handler_stop = 1;
  48                         break;
  49                 case SD_IPV4LL_EVENT_BIND:
  50                         basic_request_handler_bind = 1;
  51                         break;
  52                 default:
  53                         assert_se(0);
  54                         break;
  55         }
  56 }
  57
  58 static int arp_network_send_raw_socket(int fd, int ifindex,
  59                                        const struct ether_arp *arp) {
  60         assert_se(arp);
  61         assert_se(ifindex > 0);
  62         assert_se(fd >= 0);
  63
  64         if (send(fd, arp, sizeof(struct ether_arp), 0) < 0)
  65                 return -errno;
  66
  67         return 0;
  68 }
  69
  70 int arp_send_probe(int fd, int ifindex,
  71                     be32_t pa, const struct ether_addr *ha) {
  72         struct ether_arp ea = {};
  73
  74         assert_se(fd >= 0);
  75         assert_se(ifindex > 0);
  76         assert_se(pa != 0);
  77         assert_se(ha);
  78
  79         return arp_network_send_raw_socket(fd, ifindex, &ea);
  80 }
  81
  82 int arp_send_announcement(int fd, int ifindex,
  83                           be32_t pa, const struct ether_addr *ha) {
  84         struct ether_arp ea = {};
  85
  86         assert_se(fd >= 0);
  87         assert_se(ifindex > 0);
  88         assert_se(pa != 0);
  89         assert_se(ha);
  90
  91         return arp_network_send_raw_socket(fd, ifindex, &ea);
  92 }
  93
  94 int arp_network_bind_raw_socket(int index, be32_t address, const struct ether_addr *eth_mac) {
  95         if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK, 0, test_fd) < 0)
  96                 return -errno;
  97
  98         return test_fd[0];
  99 }
 100
 101 static void test_public_api_setters(sd_event *e) {
 102         struct in_addr address = {};
 103         uint64_t seed = 0;
 104         sd_ipv4ll *ll;
 105         struct ether_addr mac_addr = {
 106                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
 107
 108         if (verbose)
 109                 printf("* %s\n", __FUNCTION__);
 110
 111         assert_se(sd_ipv4ll_new(&ll) == 0);
 112         assert_se(ll);
 113
 114         assert_se(sd_ipv4ll_attach_event(NULL, NULL, 0) == -EINVAL);
 115         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
 116         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == -EBUSY);
 117
 118         assert_se(sd_ipv4ll_set_callback(NULL, NULL, NULL) == -EINVAL);
 119         assert_se(sd_ipv4ll_set_callback(ll, NULL, NULL) == 0);
 120
 121         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 122         address.s_addr |= htobe32(169U << 24 | 254U << 16);
 123         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 124         address.s_addr |= htobe32(0x00FF);
 125         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 126         address.s_addr |= htobe32(0xF000);
 127         assert_se(sd_ipv4ll_set_address(ll, &address) == 0);
 128         address.s_addr |= htobe32(0x0F00);
 129         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 130
 131         assert_se(sd_ipv4ll_set_address_seed(NULL, seed) == -EINVAL);
 132         assert_se(sd_ipv4ll_set_address_seed(ll, seed) == 0);
 133
 134         assert_se(sd_ipv4ll_set_mac(NULL, NULL) == -EINVAL);
 135         assert_se(sd_ipv4ll_set_mac(ll, NULL) == -EINVAL);
 136         assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
 137
 138         assert_se(sd_ipv4ll_set_ifindex(NULL, -1) == -EINVAL);
 139         assert_se(sd_ipv4ll_set_ifindex(ll, -1) == -EINVAL);
 140         assert_se(sd_ipv4ll_set_ifindex(ll, -99) == -EINVAL);
 141         assert_se(sd_ipv4ll_set_ifindex(ll, 1) == 0);
 142         assert_se(sd_ipv4ll_set_ifindex(ll, 99) == 0);
 143
 144         assert_se(sd_ipv4ll_ref(ll) == ll);
 145         assert_se(sd_ipv4ll_unref(ll) == NULL);
 146
 147         /* Cleanup */
 148         assert_se(sd_ipv4ll_unref(ll) == NULL);
 149 }
 150
 151 static void test_basic_request(sd_event *e) {
 152
 153         sd_ipv4ll *ll;
 154         struct ether_arp arp;
 155         struct ether_addr mac_addr = {
 156                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
 157
 158         if (verbose)
 159                 printf("* %s\n", __FUNCTION__);
 160
 161         assert_se(sd_ipv4ll_new(&ll) == 0);
 162         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 163
 164         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
 165         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 166
 167         assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
 168         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 169
 170         assert_se(sd_ipv4ll_set_callback(ll, basic_request_handler,
 171                                          basic_request_handler_userdata) == 0);
 172         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 173
 174         assert_se(sd_ipv4ll_set_ifindex(ll, 1) == 0);
 175         assert_se(sd_ipv4ll_start(ll) == 0);
 176
 177         sd_event_run(e, (uint64_t) -1);
 178         assert_se(sd_ipv4ll_start(ll) == -EBUSY);
 179
 180         assert_se(sd_ipv4ll_is_running(ll));
 181
 182         /* PROBE */
 183         sd_event_run(e, (uint64_t) -1);
 184         assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 185
 186         if (extended) {
 187                 /* PROBE */
 188                 sd_event_run(e, (uint64_t) -1);
 189                 assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 190
 191                 /* PROBE */
 192                 sd_event_run(e, (uint64_t) -1);
 193                 assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 194
 195                 sd_event_run(e, (uint64_t) -1);
 196                 assert_se(basic_request_handler_bind == 1);
 197         }
 198
 199         sd_ipv4ll_stop(ll);
 200         assert_se(basic_request_handler_stop == 1);
 201
 202         /* Cleanup */
 203         assert_se(sd_ipv4ll_unref(ll) == NULL);
 204         safe_close(test_fd[1]);
 205 }
 206
 207 int main(int argc, char *argv[]) {
 208         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
 209
 210         log_set_max_level(LOG_DEBUG);
 211         log_parse_environment();
 212         log_open();
 213
 214         assert_se(sd_event_new(&e) >= 0);
 215
 216         test_public_api_setters(e);
 217         test_basic_request(e);
 218
 219         return 0;
 220 }