src/libsystemd-network/test-ndisc-ra.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2017 Intel Corporation. All rights reserved.
   4 ***/
   5
   6 #include <netinet/icmp6.h>
   7 #include <arpa/inet.h>
   8 #include <unistd.h>
   9
  10 #include "sd-radv.h"
  11
  12 #include "alloc-util.h"
  13 #include "hexdecoct.h"
  14 #include "icmp6-util.h"
  15 #include "socket-util.h"
  16 #include "strv.h"
  17 #include "tests.h"
  18
  19 static struct ether_addr mac_addr = {
  20         .ether_addr_octet = { 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53 }
  21 };
  22
  23 static uint8_t advertisement[] = {
  24         /* ICMPv6 Router Advertisement, no checksum */
  25         0x86, 0x00, 0x00, 0x00,  0x40, 0xc0, 0x00, 0xb4,
  26         0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
  27         /* Source Link Layer Address Option */
  28         0x01, 0x01, 0x78, 0x2b,  0xcb, 0xb3, 0x6d, 0x53,
  29         /* Prefix Information Option */
  30         0x03, 0x04, 0x40, 0xc0,  0x00, 0x00, 0x01, 0xf4,
  31         0x00, 0x00, 0x01, 0xb8,  0x00, 0x00, 0x00, 0x00,
  32         0x20, 0x01, 0x0d, 0xb8,  0xde, 0xad, 0xbe, 0xef,
  33         0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
  34         /* Prefix Information Option */
  35         0x03, 0x04, 0x40, 0xc0,  0x00, 0x27, 0x8d, 0x00,
  36         0x00, 0x09, 0x3a, 0x80,  0x00, 0x00, 0x00, 0x00,
  37         0x20, 0x01, 0x0d, 0xb8,  0x0b, 0x16, 0xd0, 0x0d,
  38         0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
  39         /* Prefix Information Option */
  40         0x03, 0x04, 0x30, 0xc0,  0x00, 0x27, 0x8d, 0x00,
  41         0x00, 0x09, 0x3a, 0x80,  0x00, 0x00, 0x00, 0x00,
  42         0x20, 0x01, 0x0d, 0xb8,  0xc0, 0x01, 0x0d, 0xad,
  43         0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
  44         /* Recursive DNS Server Option */
  45         0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
  46         0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
  47         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
  48         /* DNS Search List Option */
  49         0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
  50         0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
  51         0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  52 };
  53
  54 static sd_event_source *test_hangcheck;
  55 static bool test_stopped;
  56 static int test_fd[2];
  57 static sd_event_source *recv_router_advertisement;
  58 static struct {
  59         struct in6_addr address;
  60         unsigned char prefixlen;
  61         uint32_t valid;
  62         uint32_t preferred;
  63         bool successful;
  64 } prefix[] = {
  65         { { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
  66                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 64,
  67           500, 440, true },
  68         { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
  69                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 64,
  70           /* indicate default valid and preferred lifetimes for the test code */
  71           0, 0, true },
  72         { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
  73                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 58,
  74           0, 0,
  75           /* indicate that this prefix already exists */
  76           false },
  77         { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
  78                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 120,
  79           0, 0,
  80           /* indicate that this prefix already exists */
  81           false },
  82         { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
  83                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 12,
  84           0, 0,
  85           /* indicate that this prefix already exists */
  86           false },
  87         { { { { 0x20, 0x01, 0x0d, 0xb8, 0xc0, 0x01, 0x0d, 0xad,
  88                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 48,
  89           0, 0, true },
  90         { { { { 0x20, 0x01, 0x0d, 0xb8, 0xc0, 0x01, 0x0d, 0xad,
  91                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 60,
  92           0, 0,
  93           /* indicate that this prefix already exists */
  94           false },
  95 };
  96
  97 static const struct in6_addr test_rdnss = { { { 0x20, 0x01, 0x0d, 0xb8,
  98                                                 0xde, 0xad, 0xbe, 0xef,
  99                                                 0x00, 0x00, 0x00, 0x00,
 100                                                 0x00, 0x00, 0x00, 0x01 } } };
 101 static const char *test_dnssl[] = { "lab.intra",
 102                                     NULL };
 103
 104 static int test_rs_hangcheck(sd_event_source *s, uint64_t usec,
 105                              void *userdata) {
 106         assert_se(false);
 107
 108         return 0;
 109 }
 110
 111 static void test_radv_prefix(void) {
 112         sd_radv_prefix *p;
 113
 114         printf("* %s\n", __FUNCTION__);
 115
 116         assert_se(sd_radv_prefix_new(&p) >= 0);
 117
 118         assert_se(sd_radv_prefix_set_onlink(NULL, true) < 0);
 119         assert_se(sd_radv_prefix_set_onlink(p, true) >= 0);
 120         assert_se(sd_radv_prefix_set_onlink(p, false) >= 0);
 121
 122         assert_se(sd_radv_prefix_set_address_autoconfiguration(NULL, true) < 0);
 123         assert_se(sd_radv_prefix_set_address_autoconfiguration(p, true) >= 0);
 124         assert_se(sd_radv_prefix_set_address_autoconfiguration(p, false) >= 0);
 125
 126         assert_se(sd_radv_prefix_set_valid_lifetime(NULL, true) < 0);
 127         assert_se(sd_radv_prefix_set_valid_lifetime(p, ~0) >= 0);
 128         assert_se(sd_radv_prefix_set_valid_lifetime(p, 42) >= 0);
 129         assert_se(sd_radv_prefix_set_valid_lifetime(p, 0) >= 0);
 130
 131         assert_se(sd_radv_prefix_set_preferred_lifetime(NULL, true) < 0);
 132         assert_se(sd_radv_prefix_set_preferred_lifetime(p, ~0) >= 0);
 133         assert_se(sd_radv_prefix_set_preferred_lifetime(p, 42) >= 0);
 134         assert_se(sd_radv_prefix_set_preferred_lifetime(p, 0) >= 0);
 135
 136         assert_se(sd_radv_prefix_set_prefix(NULL, NULL, 0) < 0);
 137         assert_se(sd_radv_prefix_set_prefix(p, NULL, 0) < 0);
 138
 139         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 64) >= 0);
 140         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 0) < 0);
 141         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 1) < 0);
 142         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 2) < 0);
 143         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 3) >= 0);
 144         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 125) >= 0);
 145         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 128) >= 0);
 146         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 129) < 0);
 147         assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 255) < 0);
 148
 149         p = sd_radv_prefix_unref(p);
 150         assert_se(!p);
 151 }
 152
 153 static void test_radv(void) {
 154         sd_radv *ra;
 155
 156         printf("* %s\n", __FUNCTION__);
 157
 158         assert_se(sd_radv_new(&ra) >= 0);
 159         assert_se(ra);
 160
 161         assert_se(sd_radv_set_ifindex(NULL, 0) < 0);
 162         assert_se(sd_radv_set_ifindex(ra, 0) < 0);
 163         assert_se(sd_radv_set_ifindex(ra, -1) < 0);
 164         assert_se(sd_radv_set_ifindex(ra, -2) < 0);
 165         assert_se(sd_radv_set_ifindex(ra, 42) >= 0);
 166
 167         assert_se(sd_radv_set_mac(NULL, NULL) < 0);
 168         assert_se(sd_radv_set_mac(ra, NULL) >= 0);
 169         assert_se(sd_radv_set_mac(ra, &mac_addr) >= 0);
 170
 171         assert_se(sd_radv_set_mtu(NULL, 0) < 0);
 172         assert_se(sd_radv_set_mtu(ra, 0) < 0);
 173         assert_se(sd_radv_set_mtu(ra, 1279) < 0);
 174         assert_se(sd_radv_set_mtu(ra, 1280) >= 0);
 175         assert_se(sd_radv_set_mtu(ra, ~0) >= 0);
 176
 177         assert_se(sd_radv_set_hop_limit(NULL, 0) < 0);
 178         assert_se(sd_radv_set_hop_limit(ra, 0) >= 0);
 179         assert_se(sd_radv_set_hop_limit(ra, ~0) >= 0);
 180
 181         assert_se(sd_radv_set_router_lifetime(NULL, 0) < 0);
 182         assert_se(sd_radv_set_router_lifetime(ra, 0) >= 0);
 183         assert_se(sd_radv_set_router_lifetime(ra, ~0) >= 0);
 184
 185         assert_se(sd_radv_set_preference(NULL, 0) < 0);
 186         assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_LOW) >= 0);
 187         assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_MEDIUM) >= 0);
 188         assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_HIGH) >= 0);
 189         assert_se(sd_radv_set_preference(ra, ~0) < 0);
 190
 191         assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_HIGH) >= 0);
 192         assert_se(sd_radv_set_router_lifetime(ra, 42000) >= 0);
 193         assert_se(sd_radv_set_router_lifetime(ra, 0) < 0);
 194         assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_MEDIUM) >= 0);
 195         assert_se(sd_radv_set_router_lifetime(ra, 0) >= 0);
 196
 197         assert_se(sd_radv_set_managed_information(NULL, true) < 0);
 198         assert_se(sd_radv_set_managed_information(ra, true) >= 0);
 199         assert_se(sd_radv_set_managed_information(ra, false) >= 0);
 200
 201         assert_se(sd_radv_set_other_information(NULL, true) < 0);
 202         assert_se(sd_radv_set_other_information(ra, true) >= 0);
 203         assert_se(sd_radv_set_other_information(ra, false) >= 0);
 204
 205         assert_se(sd_radv_set_rdnss(NULL, 0, NULL, 0) < 0);
 206         assert_se(sd_radv_set_rdnss(ra, 0, NULL, 0) >= 0);
 207         assert_se(sd_radv_set_rdnss(ra, 0, NULL, 128) < 0);
 208         assert_se(sd_radv_set_rdnss(ra, 600, &test_rdnss, 0) >= 0);
 209         assert_se(sd_radv_set_rdnss(ra, 600, &test_rdnss, 1) >= 0);
 210         assert_se(sd_radv_set_rdnss(ra, 0, &test_rdnss, 1) >= 0);
 211         assert_se(sd_radv_set_rdnss(ra, 0, NULL, 0) >= 0);
 212
 213         assert_se(sd_radv_set_dnssl(ra, 0, NULL) >= 0);
 214         assert_se(sd_radv_set_dnssl(ra, 600, NULL) >= 0);
 215         assert_se(sd_radv_set_dnssl(ra, 0, (char **)test_dnssl) >= 0);
 216         assert_se(sd_radv_set_dnssl(ra, 600, (char **)test_dnssl) >= 0);
 217
 218         ra = sd_radv_unref(ra);
 219         assert_se(!ra);
 220 }
 221
 222 int icmp6_bind_router_solicitation(int ifindex) {
 223         return -ENOSYS;
 224 }
 225
 226 int icmp6_bind_router_advertisement(int ifindex) {
 227         assert_se(ifindex == 42);
 228
 229         return test_fd[1];
 230 }
 231
 232 int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
 233
 234         return 0;
 235 }
 236
 237 int icmp6_receive(int fd, void *iov_base, size_t iov_len,
 238                   struct in6_addr *dst, triple_timestamp *timestamp) {
 239         assert_se(read (fd, iov_base, iov_len) == (ssize_t)iov_len);
 240
 241         if (timestamp)
 242                 triple_timestamp_get(timestamp);
 243
 244         return 0;
 245 }
 246
 247 static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
 248         sd_radv *ra = userdata;
 249         unsigned char buf[168];
 250         size_t i;
 251
 252         assert_se(read(test_fd[0], &buf, sizeof(buf)) == sizeof(buf));
 253
 254         /* router lifetime must be zero when test is stopped */
 255         if (test_stopped) {
 256                 advertisement[6] = 0x00;
 257                 advertisement[7] = 0x00;
 258         }
 259
 260         printf ("Received Router Advertisement with lifetime %u\n",
 261                 (advertisement[6] << 8) + advertisement[7]);
 262
 263         /* test only up to buf size, rest is not yet implemented */
 264         for (i = 0; i < sizeof(buf); i++) {
 265                 if (!(i % 8))
 266                         printf("%3zd: ", i);
 267
 268                 printf("0x%02x", buf[i]);
 269
 270                 assert_se(buf[i] == advertisement[i]);
 271
 272                 if ((i + 1) % 8)
 273                         printf(", ");
 274                 else
 275                         printf("\n");
 276         }
 277
 278         if (test_stopped) {
 279                 sd_event *e;
 280
 281                 e = sd_radv_get_event(ra);
 282                 sd_event_exit(e, 0);
 283
 284                 return 0;
 285         }
 286
 287         assert_se(sd_radv_stop(ra) >= 0);
 288         test_stopped = true;
 289
 290         return 0;
 291 }
 292
 293 static void test_ra(void) {
 294         sd_event *e;
 295         sd_radv *ra;
 296         usec_t time_now = now(clock_boottime_or_monotonic());
 297         unsigned i;
 298
 299         printf("* %s\n", __FUNCTION__);
 300
 301         assert_se(socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) >= 0);
 302
 303         assert_se(sd_event_new(&e) >= 0);
 304
 305         assert_se(sd_radv_new(&ra) >= 0);
 306         assert_se(ra);
 307
 308         assert_se(sd_radv_attach_event(ra, e, 0) >= 0);
 309
 310         assert_se(sd_radv_set_ifindex(ra, 42) >= 0);
 311         assert_se(sd_radv_set_mac(ra, &mac_addr) >= 0);
 312         assert_se(sd_radv_set_router_lifetime(ra, 180) >= 0);
 313         assert_se(sd_radv_set_hop_limit(ra, 64) >= 0);
 314         assert_se(sd_radv_set_managed_information(ra, true) >= 0);
 315         assert_se(sd_radv_set_other_information(ra, true) >= 0);
 316         assert_se(sd_radv_set_rdnss(ra, 60, &test_rdnss, 1) >= 0);
 317         assert_se(sd_radv_set_dnssl(ra, 60, (char **)test_dnssl) >= 0);
 318
 319         for (i = 0; i < ELEMENTSOF(prefix); i++) {
 320                 sd_radv_prefix *p;
 321
 322                 printf("Test prefix %u\n", i);
 323                 assert_se(sd_radv_prefix_new(&p) >= 0);
 324
 325                 assert_se(sd_radv_prefix_set_prefix(p, &prefix[i].address,
 326                                                     prefix[i].prefixlen) >= 0);
 327                 if (prefix[i].valid)
 328                         assert_se(sd_radv_prefix_set_valid_lifetime(p, prefix[i].valid) >= 0);
 329                 if (prefix[i].preferred)
 330                         assert_se(sd_radv_prefix_set_preferred_lifetime(p, prefix[i].preferred) >= 0);
 331
 332                 assert_se((sd_radv_add_prefix(ra, p, false) >= 0) == prefix[i].successful);
 333                 assert_se(sd_radv_add_prefix(ra, p, false) < 0);
 334
 335                 p = sd_radv_prefix_unref(p);
 336                 assert_se(!p);
 337         }
 338
 339         assert_se(sd_event_add_io(e, &recv_router_advertisement, test_fd[0],
 340                                   EPOLLIN, radv_recv, ra) >= 0);
 341
 342         assert_se(sd_event_add_time(e, &test_hangcheck, clock_boottime_or_monotonic(),
 343                                  time_now + 2 *USEC_PER_SEC, 0,
 344                                  test_rs_hangcheck, NULL) >= 0);
 345
 346         assert_se(sd_radv_start(ra) >= 0);
 347
 348         sd_event_loop(e);
 349
 350         test_hangcheck = sd_event_source_unref(test_hangcheck);
 351
 352         ra = sd_radv_unref(ra);
 353         assert_se(!ra);
 354
 355         close(test_fd[0]);
 356
 357         sd_event_unref(e);
 358 }
 359
 360 int main(int argc, char *argv[]) {
 361
 362         test_setup_logging(LOG_DEBUG);
 363
 364         test_radv_prefix();
 365         test_radv();
 366         test_ra();
 367
 368         printf("* done\n");
 369         return 0;
 370 }