src/libsystemd/sd-netlink/test-netlink.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <net/if.h>
   4 #include <netinet/ether.h>
   5 #include <netinet/in.h>
   6 #include <linux/fou.h>
   7 #include <linux/genetlink.h>
   8 #include <linux/if_macsec.h>
   9 #include <linux/l2tp.h>
  10 #include <linux/nl80211.h>
  11
  12 #include "sd-netlink.h"
  13
  14 #include "alloc-util.h"
  15 #include "ether-addr-util.h"
  16 #include "macro.h"
  17 #include "netlink-genl.h"
  18 #include "netlink-internal.h"
  19 #include "netlink-util.h"
  20 #include "socket-util.h"
  21 #include "stdio-util.h"
  22 #include "string-util.h"
  23 #include "strv.h"
  24 #include "tests.h"
  25
  26 static void test_message_link_bridge(sd_netlink *rtnl) {
  27         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
  28         uint32_t cost;
  29
  30         log_debug("/* %s */", __func__);
  31
  32         assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_NEWLINK, 1) >= 0);
  33         assert_se(sd_rtnl_message_link_set_family(message, AF_BRIDGE) >= 0);
  34         assert_se(sd_netlink_message_open_container(message, IFLA_PROTINFO) >= 0);
  35         assert_se(sd_netlink_message_append_u32(message, IFLA_BRPORT_COST, 10) >= 0);
  36         assert_se(sd_netlink_message_close_container(message) >= 0);
  37
  38         assert_se(sd_netlink_message_rewind(message, rtnl) >= 0);
  39
  40         assert_se(sd_netlink_message_enter_container(message, IFLA_PROTINFO) >= 0);
  41         assert_se(sd_netlink_message_read_u32(message, IFLA_BRPORT_COST, &cost) >= 0);
  42         assert_se(cost == 10);
  43         assert_se(sd_netlink_message_exit_container(message) >= 0);
  44 }
  45
  46 static void test_link_configure(sd_netlink *rtnl, int ifindex) {
  47         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL, *reply = NULL;
  48         uint32_t mtu_out;
  49         const char *name_out;
  50         struct ether_addr mac_out;
  51
  52         log_debug("/* %s */", __func__);
  53
  54         /* we'd really like to test NEWLINK, but let's not mess with the running kernel */
  55         assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_GETLINK, ifindex) >= 0);
  56
  57         assert_se(sd_netlink_call(rtnl, message, 0, &reply) == 1);
  58
  59         assert_se(sd_netlink_message_read_string(reply, IFLA_IFNAME, &name_out) >= 0);
  60         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &mac_out) >= 0);
  61         assert_se(sd_netlink_message_read_u32(reply, IFLA_MTU, &mtu_out) >= 0);
  62 }
  63
  64 static void test_link_get(sd_netlink *rtnl, int ifindex) {
  65         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *r = NULL;
  66         const char *str_data;
  67         uint8_t u8_data;
  68         uint32_t u32_data;
  69         struct ether_addr eth_data;
  70
  71         log_debug("/* %s */", __func__);
  72
  73         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
  74         assert_se(m);
  75
  76         assert_se(sd_netlink_call(rtnl, m, 0, &r) == 1);
  77
  78         assert_se(sd_netlink_message_read_string(r, IFLA_IFNAME, &str_data) == 0);
  79
  80         assert_se(sd_netlink_message_read_u8(r, IFLA_CARRIER, &u8_data) == 0);
  81         assert_se(sd_netlink_message_read_u8(r, IFLA_OPERSTATE, &u8_data) == 0);
  82         assert_se(sd_netlink_message_read_u8(r, IFLA_LINKMODE, &u8_data) == 0);
  83
  84         assert_se(sd_netlink_message_read_u32(r, IFLA_MTU, &u32_data) == 0);
  85         assert_se(sd_netlink_message_read_u32(r, IFLA_GROUP, &u32_data) == 0);
  86         assert_se(sd_netlink_message_read_u32(r, IFLA_TXQLEN, &u32_data) == 0);
  87         assert_se(sd_netlink_message_read_u32(r, IFLA_NUM_TX_QUEUES, &u32_data) == 0);
  88         assert_se(sd_netlink_message_read_u32(r, IFLA_NUM_RX_QUEUES, &u32_data) == 0);
  89
  90         assert_se(sd_netlink_message_read_ether_addr(r, IFLA_ADDRESS, &eth_data) == 0);
  91 }
  92
  93 static void test_address_get(sd_netlink *rtnl, int ifindex) {
  94         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *r = NULL;
  95         struct in_addr in_data;
  96         struct ifa_cacheinfo cache;
  97         const char *label;
  98
  99         log_debug("/* %s */", __func__);
 100
 101         assert_se(sd_rtnl_message_new_addr(rtnl, &m, RTM_GETADDR, ifindex, AF_INET) >= 0);
 102         assert_se(m);
 103         assert_se(sd_netlink_message_request_dump(m, true) >= 0);
 104         assert_se(sd_netlink_call(rtnl, m, -1, &r) == 1);
 105
 106         assert_se(sd_netlink_message_read_in_addr(r, IFA_LOCAL, &in_data) == 0);
 107         assert_se(sd_netlink_message_read_in_addr(r, IFA_ADDRESS, &in_data) == 0);
 108         assert_se(sd_netlink_message_read_string(r, IFA_LABEL, &label) == 0);
 109         assert_se(sd_netlink_message_read_cache_info(r, IFA_CACHEINFO, &cache) == 0);
 110 }
 111
 112 static void test_route(sd_netlink *rtnl) {
 113         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 114         struct in_addr addr, addr_data;
 115         uint32_t index = 2, u32_data;
 116         int r;
 117
 118         log_debug("/* %s */", __func__);
 119
 120         r = sd_rtnl_message_new_route(rtnl, &req, RTM_NEWROUTE, AF_INET, RTPROT_STATIC);
 121         if (r < 0) {
 122                 log_error_errno(r, "Could not create RTM_NEWROUTE message: %m");
 123                 return;
 124         }
 125
 126         addr.s_addr = htobe32(INADDR_LOOPBACK);
 127
 128         r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &addr);
 129         if (r < 0) {
 130                 log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
 131                 return;
 132         }
 133
 134         r = sd_netlink_message_append_u32(req, RTA_OIF, index);
 135         if (r < 0) {
 136                 log_error_errno(r, "Could not append RTA_OIF attribute: %m");
 137                 return;
 138         }
 139
 140         assert_se(sd_netlink_message_rewind(req, rtnl) >= 0);
 141
 142         assert_se(sd_netlink_message_read_in_addr(req, RTA_GATEWAY, &addr_data) >= 0);
 143         assert_se(addr_data.s_addr == addr.s_addr);
 144
 145         assert_se(sd_netlink_message_read_u32(req, RTA_OIF, &u32_data) >= 0);
 146         assert_se(u32_data == index);
 147
 148         assert_se((req = sd_netlink_message_unref(req)) == NULL);
 149 }
 150
 151 static void test_multiple(void) {
 152         sd_netlink *rtnl1, *rtnl2;
 153
 154         log_debug("/* %s */", __func__);
 155
 156         assert_se(sd_netlink_open(&rtnl1) >= 0);
 157         assert_se(sd_netlink_open(&rtnl2) >= 0);
 158
 159         rtnl1 = sd_netlink_unref(rtnl1);
 160         rtnl2 = sd_netlink_unref(rtnl2);
 161 }
 162
 163 static int link_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 164         char *ifname = userdata;
 165         const char *data;
 166
 167         assert_se(rtnl);
 168         assert_se(m);
 169         assert_se(userdata);
 170
 171         log_info("%s: got link info about %s", __func__, ifname);
 172         free(ifname);
 173
 174         assert_se(sd_netlink_message_read_string(m, IFLA_IFNAME, &data) >= 0);
 175         assert_se(streq(data, "lo"));
 176
 177         return 1;
 178 }
 179
 180 static void test_event_loop(int ifindex) {
 181         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
 182         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 183         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 184         char *ifname;
 185
 186         log_debug("/* %s */", __func__);
 187
 188         ifname = strdup("lo2");
 189         assert_se(ifname);
 190
 191         assert_se(sd_netlink_open(&rtnl) >= 0);
 192         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 193
 194         assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler, NULL, ifname, 0, NULL) >= 0);
 195
 196         assert_se(sd_event_default(&event) >= 0);
 197
 198         assert_se(sd_netlink_attach_event(rtnl, event, 0) >= 0);
 199
 200         assert_se(sd_event_run(event, 0) >= 0);
 201
 202         assert_se(sd_netlink_detach_event(rtnl) >= 0);
 203
 204         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 205 }
 206
 207 static void test_async_destroy(void *userdata) {
 208 }
 209
 210 static void test_async(int ifindex) {
 211         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 212         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *r = NULL;
 213         _cleanup_(sd_netlink_slot_unrefp) sd_netlink_slot *slot = NULL;
 214         sd_netlink_destroy_t destroy_callback;
 215         const char *description;
 216         char *ifname;
 217
 218         log_debug("/* %s */", __func__);
 219
 220         ifname = strdup("lo");
 221         assert_se(ifname);
 222
 223         assert_se(sd_netlink_open(&rtnl) >= 0);
 224
 225         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 226
 227         assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler, test_async_destroy, ifname, 0, "hogehoge") >= 0);
 228
 229         assert_se(sd_netlink_slot_get_netlink(slot) == rtnl);
 230         assert_se(sd_netlink_slot_get_userdata(slot) == ifname);
 231         assert_se(sd_netlink_slot_get_destroy_callback(slot, &destroy_callback) == 1);
 232         assert_se(destroy_callback == test_async_destroy);
 233         assert_se(sd_netlink_slot_get_floating(slot) == 0);
 234         assert_se(sd_netlink_slot_get_description(slot, &description) == 1);
 235         assert_se(streq(description, "hogehoge"));
 236
 237         assert_se(sd_netlink_wait(rtnl, 0) >= 0);
 238         assert_se(sd_netlink_process(rtnl, &r) >= 0);
 239
 240         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 241 }
 242
 243 static void test_slot_set(int ifindex) {
 244         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 245         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *r = NULL;
 246         _cleanup_(sd_netlink_slot_unrefp) sd_netlink_slot *slot = NULL;
 247         sd_netlink_destroy_t destroy_callback;
 248         const char *description;
 249         char *ifname;
 250
 251         log_debug("/* %s */", __func__);
 252
 253         ifname = strdup("lo");
 254         assert_se(ifname);
 255
 256         assert_se(sd_netlink_open(&rtnl) >= 0);
 257
 258         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 259
 260         assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler, NULL, NULL, 0, NULL) >= 0);
 261
 262         assert_se(sd_netlink_slot_get_netlink(slot) == rtnl);
 263         assert_se(!sd_netlink_slot_get_userdata(slot));
 264         assert_se(!sd_netlink_slot_set_userdata(slot, ifname));
 265         assert_se(sd_netlink_slot_get_userdata(slot) == ifname);
 266         assert_se(sd_netlink_slot_get_destroy_callback(slot, NULL) == 0);
 267         assert_se(sd_netlink_slot_set_destroy_callback(slot, test_async_destroy) >= 0);
 268         assert_se(sd_netlink_slot_get_destroy_callback(slot, &destroy_callback) == 1);
 269         assert_se(destroy_callback == test_async_destroy);
 270         assert_se(sd_netlink_slot_get_floating(slot) == 0);
 271         assert_se(sd_netlink_slot_set_floating(slot, 1) == 1);
 272         assert_se(sd_netlink_slot_get_floating(slot) == 1);
 273         assert_se(sd_netlink_slot_get_description(slot, NULL) == 0);
 274         assert_se(sd_netlink_slot_set_description(slot, "hogehoge") >= 0);
 275         assert_se(sd_netlink_slot_get_description(slot, &description) == 1);
 276         assert_se(streq(description, "hogehoge"));
 277
 278         assert_se(sd_netlink_wait(rtnl, 0) >= 0);
 279         assert_se(sd_netlink_process(rtnl, &r) >= 0);
 280
 281         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 282 }
 283
 284 struct test_async_object {
 285         unsigned n_ref;
 286         char *ifname;
 287 };
 288
 289 static struct test_async_object *test_async_object_free(struct test_async_object *t) {
 290         assert(t);
 291
 292         free(t->ifname);
 293         return mfree(t);
 294 }
 295
 296 DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(struct test_async_object, test_async_object, test_async_object_free);
 297 DEFINE_TRIVIAL_CLEANUP_FUNC(struct test_async_object *, test_async_object_unref);
 298
 299 static int link_handler2(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 300         struct test_async_object *t = userdata;
 301         const char *data;
 302
 303         assert_se(rtnl);
 304         assert_se(m);
 305         assert_se(userdata);
 306
 307         log_info("%s: got link info about %s", __func__, t->ifname);
 308
 309         assert_se(sd_netlink_message_read_string(m, IFLA_IFNAME, &data) >= 0);
 310         assert_se(streq(data, "lo"));
 311
 312         return 1;
 313 }
 314
 315 static void test_async_object_destroy(void *userdata) {
 316         struct test_async_object *t = userdata;
 317
 318         assert(userdata);
 319
 320         log_info("%s: n_ref=%u", __func__, t->n_ref);
 321         test_async_object_unref(t);
 322 }
 323
 324 static void test_async_destroy_callback(int ifindex) {
 325         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 326         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *r = NULL;
 327         _cleanup_(test_async_object_unrefp) struct test_async_object *t = NULL;
 328         _cleanup_(sd_netlink_slot_unrefp) sd_netlink_slot *slot = NULL;
 329         char *ifname;
 330
 331         log_debug("/* %s */", __func__);
 332
 333         assert_se(t = new(struct test_async_object, 1));
 334         assert_se(ifname = strdup("lo"));
 335         *t = (struct test_async_object) {
 336                 .n_ref = 1,
 337                 .ifname = ifname,
 338         };
 339
 340         assert_se(sd_netlink_open(&rtnl) >= 0);
 341
 342         /* destroy callback is called after processing message */
 343         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 344         assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler2, test_async_object_destroy, t, 0, NULL) >= 0);
 345
 346         assert_se(t->n_ref == 1);
 347         assert_se(test_async_object_ref(t));
 348         assert_se(t->n_ref == 2);
 349
 350         assert_se(sd_netlink_wait(rtnl, 0) >= 0);
 351         assert_se(sd_netlink_process(rtnl, &r) == 1);
 352         assert_se(t->n_ref == 1);
 353
 354         assert_se(!sd_netlink_message_unref(m));
 355
 356         /* destroy callback is called when asynchronous call is cancelled, that is, slot is freed. */
 357         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 358         assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler2, test_async_object_destroy, t, 0, NULL) >= 0);
 359
 360         assert_se(t->n_ref == 1);
 361         assert_se(test_async_object_ref(t));
 362         assert_se(t->n_ref == 2);
 363
 364         assert_se(!(slot = sd_netlink_slot_unref(slot)));
 365         assert_se(t->n_ref == 1);
 366
 367         assert_se(!sd_netlink_message_unref(m));
 368
 369         /* destroy callback is also called by sd_netlink_unref() */
 370         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 371         assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler2, test_async_object_destroy, t, 0, NULL) >= 0);
 372
 373         assert_se(t->n_ref == 1);
 374         assert_se(test_async_object_ref(t));
 375         assert_se(t->n_ref == 2);
 376
 377         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 378         assert_se(t->n_ref == 1);
 379 }
 380
 381 static int pipe_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 382         int *counter = userdata;
 383         int r;
 384
 385         (*counter)--;
 386
 387         r = sd_netlink_message_get_errno(m);
 388
 389         log_info_errno(r, "%d left in pipe. got reply: %m", *counter);
 390
 391         assert_se(r >= 0);
 392
 393         return 1;
 394 }
 395
 396 static void test_pipe(int ifindex) {
 397         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 398         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m1 = NULL, *m2 = NULL;
 399         int counter = 0;
 400
 401         log_debug("/* %s */", __func__);
 402
 403         assert_se(sd_netlink_open(&rtnl) >= 0);
 404
 405         assert_se(sd_rtnl_message_new_link(rtnl, &m1, RTM_GETLINK, ifindex) >= 0);
 406         assert_se(sd_rtnl_message_new_link(rtnl, &m2, RTM_GETLINK, ifindex) >= 0);
 407
 408         counter++;
 409         assert_se(sd_netlink_call_async(rtnl, NULL, m1, pipe_handler, NULL, &counter, 0, NULL) >= 0);
 410
 411         counter++;
 412         assert_se(sd_netlink_call_async(rtnl, NULL, m2, pipe_handler, NULL, &counter, 0, NULL) >= 0);
 413
 414         while (counter > 0) {
 415                 assert_se(sd_netlink_wait(rtnl, 0) >= 0);
 416                 assert_se(sd_netlink_process(rtnl, NULL) >= 0);
 417         }
 418
 419         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 420 }
 421
 422 static void test_container(sd_netlink *rtnl) {
 423         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 424         uint16_t u16_data;
 425         uint32_t u32_data;
 426         const char *string_data;
 427
 428         log_debug("/* %s */", __func__);
 429
 430         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0) >= 0);
 431
 432         assert_se(sd_netlink_message_open_container(m, IFLA_LINKINFO) >= 0);
 433         assert_se(sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "vlan") >= 0);
 434         assert_se(sd_netlink_message_append_u16(m, IFLA_VLAN_ID, 100) >= 0);
 435         assert_se(sd_netlink_message_close_container(m) >= 0);
 436         assert_se(sd_netlink_message_append_string(m, IFLA_INFO_KIND, "vlan") >= 0);
 437         assert_se(sd_netlink_message_close_container(m) >= 0);
 438         assert_se(sd_netlink_message_close_container(m) == -EINVAL);
 439
 440         assert_se(sd_netlink_message_rewind(m, rtnl) >= 0);
 441
 442         assert_se(sd_netlink_message_enter_container(m, IFLA_LINKINFO) >= 0);
 443         assert_se(sd_netlink_message_read_string(m, IFLA_INFO_KIND, &string_data) >= 0);
 444         assert_se(streq("vlan", string_data));
 445
 446         assert_se(sd_netlink_message_enter_container(m, IFLA_INFO_DATA) >= 0);
 447         assert_se(sd_netlink_message_read_u16(m, IFLA_VLAN_ID, &u16_data) >= 0);
 448         assert_se(sd_netlink_message_exit_container(m) >= 0);
 449
 450         assert_se(sd_netlink_message_read_string(m, IFLA_INFO_KIND, &string_data) >= 0);
 451         assert_se(streq("vlan", string_data));
 452         assert_se(sd_netlink_message_exit_container(m) >= 0);
 453
 454         assert_se(sd_netlink_message_read_u32(m, IFLA_LINKINFO, &u32_data) < 0);
 455
 456         assert_se(sd_netlink_message_exit_container(m) == -EINVAL);
 457 }
 458
 459 static void test_match(void) {
 460         _cleanup_(sd_netlink_slot_unrefp) sd_netlink_slot *s1 = NULL, *s2 = NULL;
 461         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 462
 463         log_debug("/* %s */", __func__);
 464
 465         assert_se(sd_netlink_open(&rtnl) >= 0);
 466
 467         assert_se(sd_netlink_add_match(rtnl, &s1, RTM_NEWLINK, link_handler, NULL, NULL, NULL) >= 0);
 468         assert_se(sd_netlink_add_match(rtnl, &s2, RTM_NEWLINK, link_handler, NULL, NULL, NULL) >= 0);
 469         assert_se(sd_netlink_add_match(rtnl, NULL, RTM_NEWLINK, link_handler, NULL, NULL, NULL) >= 0);
 470
 471         assert_se(!(s1 = sd_netlink_slot_unref(s1)));
 472         assert_se(!(s2 = sd_netlink_slot_unref(s2)));
 473
 474         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 475 }
 476
 477 static void test_get_addresses(sd_netlink *rtnl) {
 478         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 479         sd_netlink_message *m;
 480
 481         log_debug("/* %s */", __func__);
 482
 483         assert_se(sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC) >= 0);
 484         assert_se(sd_netlink_message_request_dump(req, true) >= 0);
 485         assert_se(sd_netlink_call(rtnl, req, 0, &reply) >= 0);
 486
 487         for (m = reply; m; m = sd_netlink_message_next(m)) {
 488                 uint16_t type;
 489                 unsigned char scope, flags;
 490                 int family, ifindex;
 491
 492                 assert_se(sd_netlink_message_get_type(m, &type) >= 0);
 493                 assert_se(type == RTM_NEWADDR);
 494
 495                 assert_se(sd_rtnl_message_addr_get_ifindex(m, &ifindex) >= 0);
 496                 assert_se(sd_rtnl_message_addr_get_family(m, &family) >= 0);
 497                 assert_se(sd_rtnl_message_addr_get_scope(m, &scope) >= 0);
 498                 assert_se(sd_rtnl_message_addr_get_flags(m, &flags) >= 0);
 499
 500                 assert_se(ifindex > 0);
 501                 assert_se(IN_SET(family, AF_INET, AF_INET6));
 502
 503                 log_info("got IPv%u address on ifindex %i", family == AF_INET ? 4: 6, ifindex);
 504         }
 505 }
 506
 507 static void test_message(sd_netlink *rtnl) {
 508         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 509
 510         log_debug("/* %s */", __func__);
 511
 512         assert_se(message_new_synthetic_error(rtnl, -ETIMEDOUT, 1, &m) >= 0);
 513         assert_se(sd_netlink_message_get_errno(m) == -ETIMEDOUT);
 514 }
 515
 516 static void test_array(void) {
 517         _cleanup_(sd_netlink_unrefp) sd_netlink *genl = NULL;
 518         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 519
 520         log_debug("/* %s */", __func__);
 521
 522         assert_se(sd_genl_socket_open(&genl) >= 0);
 523         assert_se(sd_genl_message_new(genl, CTRL_GENL_NAME, CTRL_CMD_GETFAMILY, &m) >= 0);
 524
 525         assert_se(sd_netlink_message_open_container(m, CTRL_ATTR_MCAST_GROUPS) >= 0);
 526         for (unsigned i = 0; i < 10; i++) {
 527                 char name[STRLEN("hoge") + DECIMAL_STR_MAX(uint32_t)];
 528                 uint32_t id = i + 1000;
 529
 530                 xsprintf(name, "hoge%" PRIu32, id);
 531                 assert_se(sd_netlink_message_open_array(m, i + 1) >= 0);
 532                 assert_se(sd_netlink_message_append_u32(m, CTRL_ATTR_MCAST_GRP_ID, id) >= 0);
 533                 assert_se(sd_netlink_message_append_string(m, CTRL_ATTR_MCAST_GRP_NAME, name) >= 0);
 534                 assert_se(sd_netlink_message_close_container(m) >= 0);
 535         }
 536         assert_se(sd_netlink_message_close_container(m) >= 0);
 537
 538         message_seal(m);
 539         assert_se(sd_netlink_message_rewind(m, genl) >= 0);
 540
 541         assert_se(sd_netlink_message_enter_container(m, CTRL_ATTR_MCAST_GROUPS) >= 0);
 542         for (unsigned i = 0; i < 10; i++) {
 543                 char expected[STRLEN("hoge") + DECIMAL_STR_MAX(uint32_t)];
 544                 const char *name;
 545                 uint32_t id;
 546
 547                 assert_se(sd_netlink_message_enter_array(m, i + 1) >= 0);
 548                 assert_se(sd_netlink_message_read_u32(m, CTRL_ATTR_MCAST_GRP_ID, &id) >= 0);
 549                 assert_se(sd_netlink_message_read_string(m, CTRL_ATTR_MCAST_GRP_NAME, &name) >= 0);
 550                 assert_se(sd_netlink_message_exit_container(m) >= 0);
 551
 552                 assert_se(id == i + 1000);
 553                 xsprintf(expected, "hoge%" PRIu32, id);
 554                 assert_se(streq(name, expected));
 555         }
 556         assert_se(sd_netlink_message_exit_container(m) >= 0);
 557 }
 558
 559 static void test_strv(sd_netlink *rtnl) {
 560         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 561         _cleanup_strv_free_ char **names_in = NULL, **names_out;
 562         const char *p;
 563
 564         log_debug("/* %s */", __func__);
 565
 566         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINKPROP, 1) >= 0);
 567
 568         for (unsigned i = 0; i < 10; i++) {
 569                 char name[STRLEN("hoge") + DECIMAL_STR_MAX(uint32_t)];
 570
 571                 xsprintf(name, "hoge%" PRIu32, i + 1000);
 572                 assert_se(strv_extend(&names_in, name) >= 0);
 573         }
 574
 575         assert_se(sd_netlink_message_open_container(m, IFLA_PROP_LIST) >= 0);
 576         assert_se(sd_netlink_message_append_strv(m, IFLA_ALT_IFNAME, names_in) >= 0);
 577         assert_se(sd_netlink_message_close_container(m) >= 0);
 578
 579         message_seal(m);
 580         assert_se(sd_netlink_message_rewind(m, rtnl) >= 0);
 581
 582         assert_se(sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &names_out) >= 0);
 583         assert_se(strv_equal(names_in, names_out));
 584
 585         assert_se(sd_netlink_message_enter_container(m, IFLA_PROP_LIST) >= 0);
 586         assert_se(sd_netlink_message_read_string(m, IFLA_ALT_IFNAME, &p) >= 0);
 587         assert_se(streq(p, "hoge1009"));
 588         assert_se(sd_netlink_message_exit_container(m) >= 0);
 589 }
 590
 591 static int genl_ctrl_match_callback(sd_netlink *genl, sd_netlink_message *m, void *userdata) {
 592         const char *name;
 593         uint16_t id;
 594         uint8_t cmd;
 595
 596         assert(genl);
 597         assert(m);
 598
 599         assert_se(sd_genl_message_get_family_name(genl, m, &name) >= 0);
 600         assert_se(streq(name, CTRL_GENL_NAME));
 601
 602         assert_se(sd_genl_message_get_command(genl, m, &cmd) >= 0);
 603
 604         switch (cmd) {
 605         case CTRL_CMD_NEWFAMILY:
 606         case CTRL_CMD_DELFAMILY:
 607                 assert_se(sd_netlink_message_read_string(m, CTRL_ATTR_FAMILY_NAME, &name) >= 0);
 608                 assert_se(sd_netlink_message_read_u16(m, CTRL_ATTR_FAMILY_ID, &id) >= 0);
 609                 log_debug("%s: %s (id=%"PRIu16") family is %s.",
 610                           __func__, name, id, cmd == CTRL_CMD_NEWFAMILY ? "added" : "removed");
 611                 break;
 612         case CTRL_CMD_NEWMCAST_GRP:
 613         case CTRL_CMD_DELMCAST_GRP:
 614                 assert_se(sd_netlink_message_read_string(m, CTRL_ATTR_FAMILY_NAME, &name) >= 0);
 615                 assert_se(sd_netlink_message_read_u16(m, CTRL_ATTR_FAMILY_ID, &id) >= 0);
 616                 log_debug("%s: multicast group for %s (id=%"PRIu16") family is %s.",
 617                           __func__, name, id, cmd == CTRL_CMD_NEWMCAST_GRP ? "added" : "removed");
 618                 break;
 619         default:
 620                 log_debug("%s: received nlctrl message with unknown command '%"PRIu8"'.", __func__, cmd);
 621         }
 622
 623         return 0;
 624 }
 625
 626 static void test_genl(void) {
 627         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
 628         _cleanup_(sd_netlink_unrefp) sd_netlink *genl = NULL;
 629         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 630         const char *name;
 631         uint8_t cmd;
 632         int r;
 633
 634         log_debug("/* %s */", __func__);
 635
 636         assert_se(sd_genl_socket_open(&genl) >= 0);
 637         assert_se(sd_event_default(&event) >= 0);
 638         assert_se(sd_netlink_attach_event(genl, event, 0) >= 0);
 639
 640         assert_se(sd_genl_message_new(genl, CTRL_GENL_NAME, CTRL_CMD_GETFAMILY, &m) >= 0);
 641         assert_se(sd_genl_message_get_family_name(genl, m, &name) >= 0);
 642         assert_se(streq(name, CTRL_GENL_NAME));
 643         assert_se(sd_genl_message_get_command(genl, m, &cmd) >= 0);
 644         assert_se(cmd == CTRL_CMD_GETFAMILY);
 645
 646         assert_se(sd_genl_add_match(genl, NULL, CTRL_GENL_NAME, "notify", 0, genl_ctrl_match_callback, NULL, NULL, "genl-ctrl-notify") >= 0);
 647
 648         m = sd_netlink_message_unref(m);
 649         assert_se(sd_genl_message_new(genl, "should-not-exist", CTRL_CMD_GETFAMILY, &m) < 0);
 650         assert_se(sd_genl_message_new(genl, "should-not-exist", CTRL_CMD_GETFAMILY, &m) == -EOPNOTSUPP);
 651
 652         /* These families may not be supported by kernel. Hence, ignore results. */
 653         (void) sd_genl_message_new(genl, FOU_GENL_NAME, 0, &m);
 654         m = sd_netlink_message_unref(m);
 655         (void) sd_genl_message_new(genl, L2TP_GENL_NAME, 0, &m);
 656         m = sd_netlink_message_unref(m);
 657         (void) sd_genl_message_new(genl, MACSEC_GENL_NAME, 0, &m);
 658         m = sd_netlink_message_unref(m);
 659         (void) sd_genl_message_new(genl, NL80211_GENL_NAME, 0, &m);
 660
 661         for (;;) {
 662                 r = sd_event_run(event, 500 * USEC_PER_MSEC);
 663                 assert_se(r >= 0);
 664                 if (r == 0)
 665                         return;
 666         }
 667 }
 668
 669 int main(void) {
 670         sd_netlink *rtnl;
 671         sd_netlink_message *m;
 672         sd_netlink_message *r;
 673         const char *string_data;
 674         int if_loopback;
 675         uint16_t type;
 676
 677         test_setup_logging(LOG_DEBUG);
 678
 679         test_match();
 680         test_multiple();
 681
 682         assert_se(sd_netlink_open(&rtnl) >= 0);
 683         assert_se(rtnl);
 684
 685         test_route(rtnl);
 686         test_message(rtnl);
 687         test_container(rtnl);
 688         test_array();
 689         test_strv(rtnl);
 690
 691         if_loopback = (int) if_nametoindex("lo");
 692         assert_se(if_loopback > 0);
 693
 694         test_async(if_loopback);
 695         test_slot_set(if_loopback);
 696         test_async_destroy_callback(if_loopback);
 697         test_pipe(if_loopback);
 698         test_event_loop(if_loopback);
 699         test_link_configure(rtnl, if_loopback);
 700
 701         test_get_addresses(rtnl);
 702         test_message_link_bridge(rtnl);
 703
 704         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, if_loopback) >= 0);
 705         assert_se(m);
 706
 707         assert_se(sd_netlink_message_get_type(m, &type) >= 0);
 708         assert_se(type == RTM_GETLINK);
 709
 710         assert_se(sd_netlink_message_read_string(m, IFLA_IFNAME, &string_data) == -EPERM);
 711
 712         assert_se(sd_netlink_call(rtnl, m, 0, &r) == 1);
 713         assert_se(sd_netlink_message_get_type(r, &type) >= 0);
 714         assert_se(type == RTM_NEWLINK);
 715
 716         assert_se((r = sd_netlink_message_unref(r)) == NULL);
 717
 718         assert_se(sd_netlink_call(rtnl, m, -1, &r) == -EPERM);
 719         assert_se((m = sd_netlink_message_unref(m)) == NULL);
 720         assert_se((r = sd_netlink_message_unref(r)) == NULL);
 721
 722         test_link_get(rtnl, if_loopback);
 723         test_address_get(rtnl, if_loopback);
 724
 725         assert_se((m = sd_netlink_message_unref(m)) == NULL);
 726         assert_se((r = sd_netlink_message_unref(r)) == NULL);
 727         assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL);
 728
 729         test_genl();
 730
 731         return EXIT_SUCCESS;
 732 }