1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (C) 2017 Cavium, Inc. 3 */ 4 #include <linux/bpf.h> 5 #include <linux/netlink.h> 6 #include <linux/rtnetlink.h> 7 #include <assert.h> 8 #include <errno.h> 9 #include <signal.h> 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 #include <sys/socket.h> 14 #include <unistd.h> 15 #include <bpf/bpf.h> 16 #include <arpa/inet.h> 17 #include <fcntl.h> 18 #include <poll.h> 19 #include <net/if.h> 20 #include <netdb.h> 21 #include <sys/ioctl.h> 22 #include <sys/syscall.h> 23 #include "bpf_util.h" 24 #include <bpf/libbpf.h> 25 #include <libgen.h> 26 #include <getopt.h> 27 #include <pthread.h> 28 #include "xdp_sample_user.h" 29 #include "xdp_router_ipv4.skel.h" 30 31 static const char *__doc__ = 32 "XDP IPv4 router implementation\n" 33 "Usage: xdp_router_ipv4 <IFNAME-0> ... <IFNAME-N>\n"; 34 35 static char buf[8192]; 36 static int lpm_map_fd; 37 static int arp_table_map_fd; 38 static int exact_match_map_fd; 39 static int tx_port_map_fd; 40 41 static bool routes_thread_exit; 42 static int interval = 5; 43 44 static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_MAP_CNT | 45 SAMPLE_DEVMAP_XMIT_CNT_MULTI | SAMPLE_EXCEPTION_CNT; 46 47 DEFINE_SAMPLE_INIT(xdp_router_ipv4); 48 49 static const struct option long_options[] = { 50 { "help", no_argument, NULL, 'h' }, 51 { "skb-mode", no_argument, NULL, 'S' }, 52 { "force", no_argument, NULL, 'F' }, 53 { "interval", required_argument, NULL, 'i' }, 54 { "verbose", no_argument, NULL, 'v' }, 55 { "stats", no_argument, NULL, 's' }, 56 {} 57 }; 58 59 static int get_route_table(int rtm_family); 60 61 static int recv_msg(struct sockaddr_nl sock_addr, int sock) 62 { 63 struct nlmsghdr *nh; 64 int len, nll = 0; 65 char *buf_ptr; 66 67 buf_ptr = buf; 68 while (1) { 69 len = recv(sock, buf_ptr, sizeof(buf) - nll, 0); 70 if (len < 0) 71 return len; 72 73 nh = (struct nlmsghdr *)buf_ptr; 74 75 if (nh->nlmsg_type == NLMSG_DONE) 76 break; 77 buf_ptr += len; 78 nll += len; 79 if ((sock_addr.nl_groups & RTMGRP_NEIGH) == RTMGRP_NEIGH) 80 break; 81 82 if ((sock_addr.nl_groups & RTMGRP_IPV4_ROUTE) == RTMGRP_IPV4_ROUTE) 83 break; 84 } 85 return nll; 86 } 87 88 /* Function to parse the route entry returned by netlink 89 * Updates the route entry related map entries 90 */ 91 static void read_route(struct nlmsghdr *nh, int nll) 92 { 93 char dsts[24], gws[24], ifs[16], dsts_len[24], metrics[24]; 94 struct bpf_lpm_trie_key *prefix_key; 95 struct rtattr *rt_attr; 96 struct rtmsg *rt_msg; 97 int rtm_family; 98 int rtl; 99 int i; 100 struct route_table { 101 int dst_len, iface, metric; 102 __be32 dst, gw; 103 __be64 mac; 104 } route; 105 struct arp_table { 106 __be64 mac; 107 __be32 dst; 108 }; 109 110 struct direct_map { 111 struct arp_table arp; 112 int ifindex; 113 __be64 mac; 114 } direct_entry; 115 116 memset(&route, 0, sizeof(route)); 117 for (; NLMSG_OK(nh, nll); nh = NLMSG_NEXT(nh, nll)) { 118 rt_msg = (struct rtmsg *)NLMSG_DATA(nh); 119 rtm_family = rt_msg->rtm_family; 120 if (rtm_family == AF_INET) 121 if (rt_msg->rtm_table != RT_TABLE_MAIN) 122 continue; 123 rt_attr = (struct rtattr *)RTM_RTA(rt_msg); 124 rtl = RTM_PAYLOAD(nh); 125 126 for (; RTA_OK(rt_attr, rtl); rt_attr = RTA_NEXT(rt_attr, rtl)) { 127 switch (rt_attr->rta_type) { 128 case NDA_DST: 129 sprintf(dsts, "%u", 130 (*((__be32 *)RTA_DATA(rt_attr)))); 131 break; 132 case RTA_GATEWAY: 133 sprintf(gws, "%u", 134 *((__be32 *)RTA_DATA(rt_attr))); 135 break; 136 case RTA_OIF: 137 sprintf(ifs, "%u", 138 *((int *)RTA_DATA(rt_attr))); 139 break; 140 case RTA_METRICS: 141 sprintf(metrics, "%u", 142 *((int *)RTA_DATA(rt_attr))); 143 default: 144 break; 145 } 146 } 147 sprintf(dsts_len, "%d", rt_msg->rtm_dst_len); 148 route.dst = atoi(dsts); 149 route.dst_len = atoi(dsts_len); 150 route.gw = atoi(gws); 151 route.iface = atoi(ifs); 152 route.metric = atoi(metrics); 153 assert(get_mac_addr(route.iface, &route.mac) == 0); 154 assert(bpf_map_update_elem(tx_port_map_fd, 155 &route.iface, &route.iface, 0) == 0); 156 if (rtm_family == AF_INET) { 157 struct trie_value { 158 __u8 prefix[4]; 159 __be64 value; 160 int ifindex; 161 int metric; 162 __be32 gw; 163 } *prefix_value; 164 165 prefix_key = alloca(sizeof(*prefix_key) + 3); 166 prefix_value = alloca(sizeof(*prefix_value)); 167 168 prefix_key->prefixlen = 32; 169 prefix_key->prefixlen = route.dst_len; 170 direct_entry.mac = route.mac & 0xffffffffffff; 171 direct_entry.ifindex = route.iface; 172 direct_entry.arp.mac = 0; 173 direct_entry.arp.dst = 0; 174 if (route.dst_len == 32) { 175 if (nh->nlmsg_type == RTM_DELROUTE) { 176 assert(bpf_map_delete_elem(exact_match_map_fd, 177 &route.dst) == 0); 178 } else { 179 if (bpf_map_lookup_elem(arp_table_map_fd, 180 &route.dst, 181 &direct_entry.arp.mac) == 0) 182 direct_entry.arp.dst = route.dst; 183 assert(bpf_map_update_elem(exact_match_map_fd, 184 &route.dst, 185 &direct_entry, 0) == 0); 186 } 187 } 188 for (i = 0; i < 4; i++) 189 prefix_key->data[i] = (route.dst >> i * 8) & 0xff; 190 191 if (bpf_map_lookup_elem(lpm_map_fd, prefix_key, 192 prefix_value) < 0) { 193 for (i = 0; i < 4; i++) 194 prefix_value->prefix[i] = prefix_key->data[i]; 195 prefix_value->value = route.mac & 0xffffffffffff; 196 prefix_value->ifindex = route.iface; 197 prefix_value->gw = route.gw; 198 prefix_value->metric = route.metric; 199 200 assert(bpf_map_update_elem(lpm_map_fd, 201 prefix_key, 202 prefix_value, 0 203 ) == 0); 204 } else { 205 if (nh->nlmsg_type == RTM_DELROUTE) { 206 assert(bpf_map_delete_elem(lpm_map_fd, 207 prefix_key 208 ) == 0); 209 /* Rereading the route table to check if 210 * there is an entry with the same 211 * prefix but a different metric as the 212 * deleted entry. 213 */ 214 get_route_table(AF_INET); 215 } else if (prefix_key->data[0] == 216 prefix_value->prefix[0] && 217 prefix_key->data[1] == 218 prefix_value->prefix[1] && 219 prefix_key->data[2] == 220 prefix_value->prefix[2] && 221 prefix_key->data[3] == 222 prefix_value->prefix[3] && 223 route.metric >= prefix_value->metric) { 224 continue; 225 } else { 226 for (i = 0; i < 4; i++) 227 prefix_value->prefix[i] = 228 prefix_key->data[i]; 229 prefix_value->value = 230 route.mac & 0xffffffffffff; 231 prefix_value->ifindex = route.iface; 232 prefix_value->gw = route.gw; 233 prefix_value->metric = route.metric; 234 assert(bpf_map_update_elem(lpm_map_fd, 235 prefix_key, 236 prefix_value, 237 0) == 0); 238 } 239 } 240 } 241 memset(&route, 0, sizeof(route)); 242 memset(dsts, 0, sizeof(dsts)); 243 memset(dsts_len, 0, sizeof(dsts_len)); 244 memset(gws, 0, sizeof(gws)); 245 memset(ifs, 0, sizeof(ifs)); 246 memset(&route, 0, sizeof(route)); 247 } 248 } 249 250 /* Function to read the existing route table when the process is launched*/ 251 static int get_route_table(int rtm_family) 252 { 253 struct sockaddr_nl sa; 254 struct nlmsghdr *nh; 255 int sock, seq = 0; 256 struct msghdr msg; 257 struct iovec iov; 258 int ret = 0; 259 int nll; 260 261 struct { 262 struct nlmsghdr nl; 263 struct rtmsg rt; 264 char buf[8192]; 265 } req; 266 267 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 268 if (sock < 0) { 269 fprintf(stderr, "open netlink socket: %s\n", strerror(errno)); 270 return -errno; 271 } 272 memset(&sa, 0, sizeof(sa)); 273 sa.nl_family = AF_NETLINK; 274 if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) { 275 fprintf(stderr, "bind netlink socket: %s\n", strerror(errno)); 276 ret = -errno; 277 goto cleanup; 278 } 279 memset(&req, 0, sizeof(req)); 280 req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 281 req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; 282 req.nl.nlmsg_type = RTM_GETROUTE; 283 284 req.rt.rtm_family = rtm_family; 285 req.rt.rtm_table = RT_TABLE_MAIN; 286 req.nl.nlmsg_pid = 0; 287 req.nl.nlmsg_seq = ++seq; 288 memset(&msg, 0, sizeof(msg)); 289 iov.iov_base = (void *)&req.nl; 290 iov.iov_len = req.nl.nlmsg_len; 291 msg.msg_iov = &iov; 292 msg.msg_iovlen = 1; 293 ret = sendmsg(sock, &msg, 0); 294 if (ret < 0) { 295 fprintf(stderr, "send to netlink: %s\n", strerror(errno)); 296 ret = -errno; 297 goto cleanup; 298 } 299 memset(buf, 0, sizeof(buf)); 300 nll = recv_msg(sa, sock); 301 if (nll < 0) { 302 fprintf(stderr, "recv from netlink: %s\n", strerror(nll)); 303 ret = nll; 304 goto cleanup; 305 } 306 nh = (struct nlmsghdr *)buf; 307 read_route(nh, nll); 308 cleanup: 309 close(sock); 310 return ret; 311 } 312 313 /* Function to parse the arp entry returned by netlink 314 * Updates the arp entry related map entries 315 */ 316 static void read_arp(struct nlmsghdr *nh, int nll) 317 { 318 struct rtattr *rt_attr; 319 char dsts[24], mac[24]; 320 struct ndmsg *rt_msg; 321 int rtl, ndm_family; 322 323 struct arp_table { 324 __be64 mac; 325 __be32 dst; 326 } arp_entry; 327 struct direct_map { 328 struct arp_table arp; 329 int ifindex; 330 __be64 mac; 331 } direct_entry; 332 333 for (; NLMSG_OK(nh, nll); nh = NLMSG_NEXT(nh, nll)) { 334 rt_msg = (struct ndmsg *)NLMSG_DATA(nh); 335 rt_attr = (struct rtattr *)RTM_RTA(rt_msg); 336 ndm_family = rt_msg->ndm_family; 337 rtl = RTM_PAYLOAD(nh); 338 for (; RTA_OK(rt_attr, rtl); rt_attr = RTA_NEXT(rt_attr, rtl)) { 339 switch (rt_attr->rta_type) { 340 case NDA_DST: 341 sprintf(dsts, "%u", 342 *((__be32 *)RTA_DATA(rt_attr))); 343 break; 344 case NDA_LLADDR: 345 sprintf(mac, "%lld", 346 *((__be64 *)RTA_DATA(rt_attr))); 347 break; 348 default: 349 break; 350 } 351 } 352 arp_entry.dst = atoi(dsts); 353 arp_entry.mac = atol(mac); 354 355 if (ndm_family == AF_INET) { 356 if (bpf_map_lookup_elem(exact_match_map_fd, 357 &arp_entry.dst, 358 &direct_entry) == 0) { 359 if (nh->nlmsg_type == RTM_DELNEIGH) { 360 direct_entry.arp.dst = 0; 361 direct_entry.arp.mac = 0; 362 } else if (nh->nlmsg_type == RTM_NEWNEIGH) { 363 direct_entry.arp.dst = arp_entry.dst; 364 direct_entry.arp.mac = arp_entry.mac; 365 } 366 assert(bpf_map_update_elem(exact_match_map_fd, 367 &arp_entry.dst, 368 &direct_entry, 0 369 ) == 0); 370 memset(&direct_entry, 0, sizeof(direct_entry)); 371 } 372 if (nh->nlmsg_type == RTM_DELNEIGH) { 373 assert(bpf_map_delete_elem(arp_table_map_fd, 374 &arp_entry.dst) == 0); 375 } else if (nh->nlmsg_type == RTM_NEWNEIGH) { 376 assert(bpf_map_update_elem(arp_table_map_fd, 377 &arp_entry.dst, 378 &arp_entry.mac, 0 379 ) == 0); 380 } 381 } 382 memset(&arp_entry, 0, sizeof(arp_entry)); 383 memset(dsts, 0, sizeof(dsts)); 384 } 385 } 386 387 /* Function to read the existing arp table when the process is launched*/ 388 static int get_arp_table(int rtm_family) 389 { 390 struct sockaddr_nl sa; 391 struct nlmsghdr *nh; 392 int sock, seq = 0; 393 struct msghdr msg; 394 struct iovec iov; 395 int ret = 0; 396 int nll; 397 struct { 398 struct nlmsghdr nl; 399 struct ndmsg rt; 400 char buf[8192]; 401 } req; 402 403 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 404 if (sock < 0) { 405 fprintf(stderr, "open netlink socket: %s\n", strerror(errno)); 406 return -errno; 407 } 408 memset(&sa, 0, sizeof(sa)); 409 sa.nl_family = AF_NETLINK; 410 if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) { 411 fprintf(stderr, "bind netlink socket: %s\n", strerror(errno)); 412 ret = -errno; 413 goto cleanup; 414 } 415 memset(&req, 0, sizeof(req)); 416 req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 417 req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; 418 req.nl.nlmsg_type = RTM_GETNEIGH; 419 req.rt.ndm_state = NUD_REACHABLE; 420 req.rt.ndm_family = rtm_family; 421 req.nl.nlmsg_pid = 0; 422 req.nl.nlmsg_seq = ++seq; 423 memset(&msg, 0, sizeof(msg)); 424 iov.iov_base = (void *)&req.nl; 425 iov.iov_len = req.nl.nlmsg_len; 426 msg.msg_iov = &iov; 427 msg.msg_iovlen = 1; 428 ret = sendmsg(sock, &msg, 0); 429 if (ret < 0) { 430 fprintf(stderr, "send to netlink: %s\n", strerror(errno)); 431 ret = -errno; 432 goto cleanup; 433 } 434 memset(buf, 0, sizeof(buf)); 435 nll = recv_msg(sa, sock); 436 if (nll < 0) { 437 fprintf(stderr, "recv from netlink: %s\n", strerror(nll)); 438 ret = nll; 439 goto cleanup; 440 } 441 nh = (struct nlmsghdr *)buf; 442 read_arp(nh, nll); 443 cleanup: 444 close(sock); 445 return ret; 446 } 447 448 /* Function to keep track and update changes in route and arp table 449 * Give regular statistics of packets forwarded 450 */ 451 static void *monitor_routes_thread(void *arg) 452 { 453 struct pollfd fds_route, fds_arp; 454 struct sockaddr_nl la, lr; 455 int sock, sock_arp, nll; 456 struct nlmsghdr *nh; 457 458 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 459 if (sock < 0) { 460 fprintf(stderr, "open netlink socket: %s\n", strerror(errno)); 461 return NULL; 462 } 463 464 fcntl(sock, F_SETFL, O_NONBLOCK); 465 memset(&lr, 0, sizeof(lr)); 466 lr.nl_family = AF_NETLINK; 467 lr.nl_groups = RTMGRP_IPV6_ROUTE | RTMGRP_IPV4_ROUTE | RTMGRP_NOTIFY; 468 if (bind(sock, (struct sockaddr *)&lr, sizeof(lr)) < 0) { 469 fprintf(stderr, "bind netlink socket: %s\n", strerror(errno)); 470 close(sock); 471 return NULL; 472 } 473 474 fds_route.fd = sock; 475 fds_route.events = POLL_IN; 476 477 sock_arp = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 478 if (sock_arp < 0) { 479 fprintf(stderr, "open netlink socket: %s\n", strerror(errno)); 480 close(sock); 481 return NULL; 482 } 483 484 fcntl(sock_arp, F_SETFL, O_NONBLOCK); 485 memset(&la, 0, sizeof(la)); 486 la.nl_family = AF_NETLINK; 487 la.nl_groups = RTMGRP_NEIGH | RTMGRP_NOTIFY; 488 if (bind(sock_arp, (struct sockaddr *)&la, sizeof(la)) < 0) { 489 fprintf(stderr, "bind netlink socket: %s\n", strerror(errno)); 490 goto cleanup; 491 } 492 493 fds_arp.fd = sock_arp; 494 fds_arp.events = POLL_IN; 495 496 /* dump route and arp tables */ 497 if (get_arp_table(AF_INET) < 0) { 498 fprintf(stderr, "Failed reading arp table\n"); 499 goto cleanup; 500 } 501 502 if (get_route_table(AF_INET) < 0) { 503 fprintf(stderr, "Failed reading route table\n"); 504 goto cleanup; 505 } 506 507 while (!routes_thread_exit) { 508 memset(buf, 0, sizeof(buf)); 509 if (poll(&fds_route, 1, 3) == POLL_IN) { 510 nll = recv_msg(lr, sock); 511 if (nll < 0) { 512 fprintf(stderr, "recv from netlink: %s\n", 513 strerror(nll)); 514 goto cleanup; 515 } 516 517 nh = (struct nlmsghdr *)buf; 518 read_route(nh, nll); 519 } 520 521 memset(buf, 0, sizeof(buf)); 522 if (poll(&fds_arp, 1, 3) == POLL_IN) { 523 nll = recv_msg(la, sock_arp); 524 if (nll < 0) { 525 fprintf(stderr, "recv from netlink: %s\n", 526 strerror(nll)); 527 goto cleanup; 528 } 529 530 nh = (struct nlmsghdr *)buf; 531 read_arp(nh, nll); 532 } 533 534 sleep(interval); 535 } 536 537 cleanup: 538 close(sock_arp); 539 close(sock); 540 return NULL; 541 } 542 543 static void usage(char *argv[], const struct option *long_options, 544 const char *doc, int mask, bool error, 545 struct bpf_object *obj) 546 { 547 sample_usage(argv, long_options, doc, mask, error); 548 } 549 550 int main(int argc, char **argv) 551 { 552 bool error = true, generic = false, force = false; 553 int opt, ret = EXIT_FAIL_BPF; 554 struct xdp_router_ipv4 *skel; 555 int i, total_ifindex = argc - 1; 556 char **ifname_list = argv + 1; 557 pthread_t routes_thread; 558 int longindex = 0; 559 560 if (libbpf_set_strict_mode(LIBBPF_STRICT_ALL) < 0) { 561 fprintf(stderr, "Failed to set libbpf strict mode: %s\n", 562 strerror(errno)); 563 goto end; 564 } 565 566 skel = xdp_router_ipv4__open(); 567 if (!skel) { 568 fprintf(stderr, "Failed to xdp_router_ipv4__open: %s\n", 569 strerror(errno)); 570 goto end; 571 } 572 573 ret = sample_init_pre_load(skel); 574 if (ret < 0) { 575 fprintf(stderr, "Failed to sample_init_pre_load: %s\n", 576 strerror(-ret)); 577 ret = EXIT_FAIL_BPF; 578 goto end_destroy; 579 } 580 581 ret = xdp_router_ipv4__load(skel); 582 if (ret < 0) { 583 fprintf(stderr, "Failed to xdp_router_ipv4__load: %s\n", 584 strerror(errno)); 585 goto end_destroy; 586 } 587 588 ret = sample_init(skel, mask); 589 if (ret < 0) { 590 fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret)); 591 ret = EXIT_FAIL; 592 goto end_destroy; 593 } 594 595 while ((opt = getopt_long(argc, argv, "si:SFvh", 596 long_options, &longindex)) != -1) { 597 switch (opt) { 598 case 's': 599 mask |= SAMPLE_REDIRECT_MAP_CNT; 600 total_ifindex--; 601 ifname_list++; 602 break; 603 case 'i': 604 interval = strtoul(optarg, NULL, 0); 605 total_ifindex -= 2; 606 ifname_list += 2; 607 break; 608 case 'S': 609 generic = true; 610 total_ifindex--; 611 ifname_list++; 612 break; 613 case 'F': 614 force = true; 615 total_ifindex--; 616 ifname_list++; 617 break; 618 case 'v': 619 sample_switch_mode(); 620 total_ifindex--; 621 ifname_list++; 622 break; 623 case 'h': 624 error = false; 625 default: 626 usage(argv, long_options, __doc__, mask, error, skel->obj); 627 goto end_destroy; 628 } 629 } 630 631 ret = EXIT_FAIL_OPTION; 632 if (optind == argc) { 633 usage(argv, long_options, __doc__, mask, true, skel->obj); 634 goto end_destroy; 635 } 636 637 lpm_map_fd = bpf_map__fd(skel->maps.lpm_map); 638 if (lpm_map_fd < 0) { 639 fprintf(stderr, "Failed loading lpm_map %s\n", 640 strerror(-lpm_map_fd)); 641 goto end_destroy; 642 } 643 arp_table_map_fd = bpf_map__fd(skel->maps.arp_table); 644 if (arp_table_map_fd < 0) { 645 fprintf(stderr, "Failed loading arp_table_map_fd %s\n", 646 strerror(-arp_table_map_fd)); 647 goto end_destroy; 648 } 649 exact_match_map_fd = bpf_map__fd(skel->maps.exact_match); 650 if (exact_match_map_fd < 0) { 651 fprintf(stderr, "Failed loading exact_match_map_fd %s\n", 652 strerror(-exact_match_map_fd)); 653 goto end_destroy; 654 } 655 tx_port_map_fd = bpf_map__fd(skel->maps.tx_port); 656 if (tx_port_map_fd < 0) { 657 fprintf(stderr, "Failed loading tx_port_map_fd %s\n", 658 strerror(-tx_port_map_fd)); 659 goto end_destroy; 660 } 661 662 ret = EXIT_FAIL_XDP; 663 for (i = 0; i < total_ifindex; i++) { 664 int index = if_nametoindex(ifname_list[i]); 665 666 if (!index) { 667 fprintf(stderr, "Interface %s not found %s\n", 668 ifname_list[i], strerror(-tx_port_map_fd)); 669 goto end_destroy; 670 } 671 if (sample_install_xdp(skel->progs.xdp_router_ipv4_prog, 672 index, generic, force) < 0) 673 goto end_destroy; 674 } 675 676 ret = pthread_create(&routes_thread, NULL, monitor_routes_thread, NULL); 677 if (ret) { 678 fprintf(stderr, "Failed creating routes_thread: %s\n", strerror(-ret)); 679 ret = EXIT_FAIL; 680 goto end_destroy; 681 } 682 683 ret = sample_run(interval, NULL, NULL); 684 routes_thread_exit = true; 685 686 if (ret < 0) { 687 fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret)); 688 ret = EXIT_FAIL; 689 goto end_thread_wait; 690 } 691 ret = EXIT_OK; 692 693 end_thread_wait: 694 pthread_join(routes_thread, NULL); 695 end_destroy: 696 xdp_router_ipv4__destroy(skel); 697 end: 698 sample_exit(ret); 699 } 700