src/libsystemd-network/test-ipv4ll.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2014 Axis Communications AB. All rights reserved.
   4 ***/
   5
   6 #include <errno.h>
   7 #include <netinet/if_ether.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <sys/socket.h>
  11 #include <sys/types.h>
  12 #include <unistd.h>
  13
  14 #include "sd-ipv4ll.h"
  15
  16 #include "arp-util.h"
  17 #include "fd-util.h"
  18 #include "socket-util.h"
  19 #include "tests.h"
  20 #include "util.h"
  21
  22 static bool verbose = false;
  23 static bool extended = false;
  24 static int test_fd[2];
  25
  26 static int basic_request_handler_bind = 0;
  27 static int basic_request_handler_stop = 0;
  28 static void* basic_request_handler_userdata = (void*) 0xCABCAB;
  29
  30 static void basic_request_handler(sd_ipv4ll *ll, int event, void *userdata) {
  31         assert_se(userdata == basic_request_handler_userdata);
  32
  33         switch(event) {
  34                 case SD_IPV4LL_EVENT_STOP:
  35                         basic_request_handler_stop = 1;
  36                         break;
  37                 case SD_IPV4LL_EVENT_BIND:
  38                         basic_request_handler_bind = 1;
  39                         break;
  40                 default:
  41                         assert_se(0);
  42                         break;
  43         }
  44 }
  45
  46 static int arp_network_send_raw_socket(int fd, int ifindex,
  47                                        const struct ether_arp *arp) {
  48         assert_se(arp);
  49         assert_se(ifindex > 0);
  50         assert_se(fd >= 0);
  51
  52         if (send(fd, arp, sizeof(struct ether_arp), 0) < 0)
  53                 return -errno;
  54
  55         return 0;
  56 }
  57
  58 int arp_send_probe(int fd, int ifindex,
  59                     be32_t pa, const struct ether_addr *ha) {
  60         struct ether_arp ea = {};
  61
  62         assert_se(fd >= 0);
  63         assert_se(ifindex > 0);
  64         assert_se(pa != 0);
  65         assert_se(ha);
  66
  67         return arp_network_send_raw_socket(fd, ifindex, &ea);
  68 }
  69
  70 int arp_send_announcement(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_network_bind_raw_socket(int index, be32_t address, const struct ether_addr *eth_mac) {
  83         if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
  84                 return -errno;
  85
  86         return test_fd[0];
  87 }
  88
  89 static void test_public_api_setters(sd_event *e) {
  90         struct in_addr address = {};
  91         uint64_t seed = 0;
  92         sd_ipv4ll *ll;
  93         struct ether_addr mac_addr = {
  94                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
  95
  96         if (verbose)
  97                 printf("* %s\n", __FUNCTION__);
  98
  99         assert_se(sd_ipv4ll_new(&ll) == 0);
 100         assert_se(ll);
 101
 102         assert_se(sd_ipv4ll_attach_event(NULL, NULL, 0) == -EINVAL);
 103         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
 104         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == -EBUSY);
 105
 106         assert_se(sd_ipv4ll_set_callback(NULL, NULL, NULL) == -EINVAL);
 107         assert_se(sd_ipv4ll_set_callback(ll, NULL, NULL) == 0);
 108
 109         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 110         address.s_addr |= htobe32(169U << 24 | 254U << 16);
 111         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 112         address.s_addr |= htobe32(0x00FF);
 113         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 114         address.s_addr |= htobe32(0xF000);
 115         assert_se(sd_ipv4ll_set_address(ll, &address) == 0);
 116         address.s_addr |= htobe32(0x0F00);
 117         assert_se(sd_ipv4ll_set_address(ll, &address) == -EINVAL);
 118
 119         assert_se(sd_ipv4ll_set_address_seed(NULL, seed) == -EINVAL);
 120         assert_se(sd_ipv4ll_set_address_seed(ll, seed) == 0);
 121
 122         assert_se(sd_ipv4ll_set_mac(NULL, NULL) == -EINVAL);
 123         assert_se(sd_ipv4ll_set_mac(ll, NULL) == -EINVAL);
 124         assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
 125
 126         assert_se(sd_ipv4ll_set_ifindex(NULL, -1) == -EINVAL);
 127         assert_se(sd_ipv4ll_set_ifindex(ll, -1) == -EINVAL);
 128         assert_se(sd_ipv4ll_set_ifindex(ll, -99) == -EINVAL);
 129         assert_se(sd_ipv4ll_set_ifindex(ll, 1) == 0);
 130         assert_se(sd_ipv4ll_set_ifindex(ll, 99) == 0);
 131
 132         assert_se(sd_ipv4ll_ref(ll) == ll);
 133         assert_se(sd_ipv4ll_unref(ll) == NULL);
 134
 135         /* Cleanup */
 136         assert_se(sd_ipv4ll_unref(ll) == NULL);
 137 }
 138
 139 static void test_basic_request(sd_event *e) {
 140
 141         sd_ipv4ll *ll;
 142         struct ether_arp arp;
 143         struct ether_addr mac_addr = {
 144                 .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
 145
 146         if (verbose)
 147                 printf("* %s\n", __FUNCTION__);
 148
 149         assert_se(sd_ipv4ll_new(&ll) == 0);
 150         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 151
 152         assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
 153         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 154
 155         assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
 156         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 157
 158         assert_se(sd_ipv4ll_set_callback(ll, basic_request_handler,
 159                                          basic_request_handler_userdata) == 0);
 160         assert_se(sd_ipv4ll_start(ll) == -EINVAL);
 161
 162         assert_se(sd_ipv4ll_set_ifindex(ll, 1) == 0);
 163         assert_se(sd_ipv4ll_start(ll) == 0);
 164
 165         sd_event_run(e, (uint64_t) -1);
 166         assert_se(sd_ipv4ll_start(ll) == -EBUSY);
 167
 168         assert_se(sd_ipv4ll_is_running(ll));
 169
 170         /* PROBE */
 171         sd_event_run(e, (uint64_t) -1);
 172         assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 173
 174         if (extended) {
 175                 /* PROBE */
 176                 sd_event_run(e, (uint64_t) -1);
 177                 assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 178
 179                 /* PROBE */
 180                 sd_event_run(e, (uint64_t) -1);
 181                 assert_se(recv(test_fd[1], &arp, sizeof(struct ether_arp), 0) == sizeof(struct ether_arp));
 182
 183                 sd_event_run(e, (uint64_t) -1);
 184                 assert_se(basic_request_handler_bind == 1);
 185         }
 186
 187         sd_ipv4ll_stop(ll);
 188         assert_se(basic_request_handler_stop == 1);
 189
 190         /* Cleanup */
 191         assert_se(sd_ipv4ll_unref(ll) == NULL);
 192         safe_close(test_fd[1]);
 193 }
 194
 195 int main(int argc, char *argv[]) {
 196         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
 197
 198         test_setup_logging(LOG_DEBUG);
 199
 200         assert_se(sd_event_new(&e) >= 0);
 201
 202         test_public_api_setters(e);
 203         test_basic_request(e);
 204
 205         return 0;
 206 }