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 "libbpf.h" 25 #include <sys/resource.h> 26 #include <libgen.h> 27 28 int sock, sock_arp, flags = XDP_FLAGS_UPDATE_IF_NOEXIST; 29 static int total_ifindex; 30 static int *ifindex_list; 31 static __u32 *prog_id_list; 32 char buf[8192]; 33 static int lpm_map_fd; 34 static int rxcnt_map_fd; 35 static int arp_table_map_fd; 36 static int exact_match_map_fd; 37 static int tx_port_map_fd; 38 39 static int get_route_table(int rtm_family); 40 static void int_exit(int sig) 41 { 42 __u32 prog_id = 0; 43 int i = 0; 44 45 for (i = 0; i < total_ifindex; i++) { 46 if (bpf_get_link_xdp_id(ifindex_list[i], &prog_id, flags)) { 47 printf("bpf_get_link_xdp_id on iface %d failed\n", 48 ifindex_list[i]); 49 exit(1); 50 } 51 if (prog_id_list[i] == prog_id) 52 bpf_set_link_xdp_fd(ifindex_list[i], -1, flags); 53 else if (!prog_id) 54 printf("couldn't find a prog id on iface %d\n", 55 ifindex_list[i]); 56 else 57 printf("program on iface %d changed, not removing\n", 58 ifindex_list[i]); 59 prog_id = 0; 60 } 61 exit(0); 62 } 63 64 static void close_and_exit(int sig) 65 { 66 close(sock); 67 close(sock_arp); 68 69 int_exit(0); 70 } 71 72 /* Get the mac address of the interface given interface name */ 73 static __be64 getmac(char *iface) 74 { 75 struct ifreq ifr; 76 __be64 mac = 0; 77 int fd, i; 78 79 fd = socket(AF_INET, SOCK_DGRAM, 0); 80 ifr.ifr_addr.sa_family = AF_INET; 81 strncpy(ifr.ifr_name, iface, IFNAMSIZ - 1); 82 if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) { 83 printf("ioctl failed leaving....\n"); 84 return -1; 85 } 86 for (i = 0; i < 6 ; i++) 87 *((__u8 *)&mac + i) = (__u8)ifr.ifr_hwaddr.sa_data[i]; 88 close(fd); 89 return mac; 90 } 91 92 static int recv_msg(struct sockaddr_nl sock_addr, int sock) 93 { 94 struct nlmsghdr *nh; 95 int len, nll = 0; 96 char *buf_ptr; 97 98 buf_ptr = buf; 99 while (1) { 100 len = recv(sock, buf_ptr, sizeof(buf) - nll, 0); 101 if (len < 0) 102 return len; 103 104 nh = (struct nlmsghdr *)buf_ptr; 105 106 if (nh->nlmsg_type == NLMSG_DONE) 107 break; 108 buf_ptr += len; 109 nll += len; 110 if ((sock_addr.nl_groups & RTMGRP_NEIGH) == RTMGRP_NEIGH) 111 break; 112 113 if ((sock_addr.nl_groups & RTMGRP_IPV4_ROUTE) == RTMGRP_IPV4_ROUTE) 114 break; 115 } 116 return nll; 117 } 118 119 /* Function to parse the route entry returned by netlink 120 * Updates the route entry related map entries 121 */ 122 static void read_route(struct nlmsghdr *nh, int nll) 123 { 124 char dsts[24], gws[24], ifs[16], dsts_len[24], metrics[24]; 125 struct bpf_lpm_trie_key *prefix_key; 126 struct rtattr *rt_attr; 127 struct rtmsg *rt_msg; 128 int rtm_family; 129 int rtl; 130 int i; 131 struct route_table { 132 int dst_len, iface, metric; 133 char *iface_name; 134 __be32 dst, gw; 135 __be64 mac; 136 } route; 137 struct arp_table { 138 __be64 mac; 139 __be32 dst; 140 }; 141 142 struct direct_map { 143 struct arp_table arp; 144 int ifindex; 145 __be64 mac; 146 } direct_entry; 147 148 if (nh->nlmsg_type == RTM_DELROUTE) 149 printf("DELETING Route entry\n"); 150 else if (nh->nlmsg_type == RTM_GETROUTE) 151 printf("READING Route entry\n"); 152 else if (nh->nlmsg_type == RTM_NEWROUTE) 153 printf("NEW Route entry\n"); 154 else 155 printf("%d\n", nh->nlmsg_type); 156 157 memset(&route, 0, sizeof(route)); 158 printf("Destination\t\tGateway\t\tGenmask\t\tMetric\t\tIface\n"); 159 for (; NLMSG_OK(nh, nll); nh = NLMSG_NEXT(nh, nll)) { 160 rt_msg = (struct rtmsg *)NLMSG_DATA(nh); 161 rtm_family = rt_msg->rtm_family; 162 if (rtm_family == AF_INET) 163 if (rt_msg->rtm_table != RT_TABLE_MAIN) 164 continue; 165 rt_attr = (struct rtattr *)RTM_RTA(rt_msg); 166 rtl = RTM_PAYLOAD(nh); 167 168 for (; RTA_OK(rt_attr, rtl); rt_attr = RTA_NEXT(rt_attr, rtl)) { 169 switch (rt_attr->rta_type) { 170 case NDA_DST: 171 sprintf(dsts, "%u", 172 (*((__be32 *)RTA_DATA(rt_attr)))); 173 break; 174 case RTA_GATEWAY: 175 sprintf(gws, "%u", 176 *((__be32 *)RTA_DATA(rt_attr))); 177 break; 178 case RTA_OIF: 179 sprintf(ifs, "%u", 180 *((int *)RTA_DATA(rt_attr))); 181 break; 182 case RTA_METRICS: 183 sprintf(metrics, "%u", 184 *((int *)RTA_DATA(rt_attr))); 185 default: 186 break; 187 } 188 } 189 sprintf(dsts_len, "%d", rt_msg->rtm_dst_len); 190 route.dst = atoi(dsts); 191 route.dst_len = atoi(dsts_len); 192 route.gw = atoi(gws); 193 route.iface = atoi(ifs); 194 route.metric = atoi(metrics); 195 route.iface_name = alloca(sizeof(char *) * IFNAMSIZ); 196 route.iface_name = if_indextoname(route.iface, route.iface_name); 197 route.mac = getmac(route.iface_name); 198 if (route.mac == -1) 199 int_exit(0); 200 assert(bpf_map_update_elem(tx_port_map_fd, 201 &route.iface, &route.iface, 0) == 0); 202 if (rtm_family == AF_INET) { 203 struct trie_value { 204 __u8 prefix[4]; 205 __be64 value; 206 int ifindex; 207 int metric; 208 __be32 gw; 209 } *prefix_value; 210 211 prefix_key = alloca(sizeof(*prefix_key) + 3); 212 prefix_value = alloca(sizeof(*prefix_value)); 213 214 prefix_key->prefixlen = 32; 215 prefix_key->prefixlen = route.dst_len; 216 direct_entry.mac = route.mac & 0xffffffffffff; 217 direct_entry.ifindex = route.iface; 218 direct_entry.arp.mac = 0; 219 direct_entry.arp.dst = 0; 220 if (route.dst_len == 32) { 221 if (nh->nlmsg_type == RTM_DELROUTE) { 222 assert(bpf_map_delete_elem(exact_match_map_fd, 223 &route.dst) == 0); 224 } else { 225 if (bpf_map_lookup_elem(arp_table_map_fd, 226 &route.dst, 227 &direct_entry.arp.mac) == 0) 228 direct_entry.arp.dst = route.dst; 229 assert(bpf_map_update_elem(exact_match_map_fd, 230 &route.dst, 231 &direct_entry, 0) == 0); 232 } 233 } 234 for (i = 0; i < 4; i++) 235 prefix_key->data[i] = (route.dst >> i * 8) & 0xff; 236 237 printf("%3d.%d.%d.%d\t\t%3x\t\t%d\t\t%d\t\t%s\n", 238 (int)prefix_key->data[0], 239 (int)prefix_key->data[1], 240 (int)prefix_key->data[2], 241 (int)prefix_key->data[3], 242 route.gw, route.dst_len, 243 route.metric, 244 route.iface_name); 245 if (bpf_map_lookup_elem(lpm_map_fd, prefix_key, 246 prefix_value) < 0) { 247 for (i = 0; i < 4; i++) 248 prefix_value->prefix[i] = prefix_key->data[i]; 249 prefix_value->value = route.mac & 0xffffffffffff; 250 prefix_value->ifindex = route.iface; 251 prefix_value->gw = route.gw; 252 prefix_value->metric = route.metric; 253 254 assert(bpf_map_update_elem(lpm_map_fd, 255 prefix_key, 256 prefix_value, 0 257 ) == 0); 258 } else { 259 if (nh->nlmsg_type == RTM_DELROUTE) { 260 printf("deleting entry\n"); 261 printf("prefix key=%d.%d.%d.%d/%d", 262 prefix_key->data[0], 263 prefix_key->data[1], 264 prefix_key->data[2], 265 prefix_key->data[3], 266 prefix_key->prefixlen); 267 assert(bpf_map_delete_elem(lpm_map_fd, 268 prefix_key 269 ) == 0); 270 /* Rereading the route table to check if 271 * there is an entry with the same 272 * prefix but a different metric as the 273 * deleted enty. 274 */ 275 get_route_table(AF_INET); 276 } else if (prefix_key->data[0] == 277 prefix_value->prefix[0] && 278 prefix_key->data[1] == 279 prefix_value->prefix[1] && 280 prefix_key->data[2] == 281 prefix_value->prefix[2] && 282 prefix_key->data[3] == 283 prefix_value->prefix[3] && 284 route.metric >= prefix_value->metric) { 285 continue; 286 } else { 287 for (i = 0; i < 4; i++) 288 prefix_value->prefix[i] = 289 prefix_key->data[i]; 290 prefix_value->value = 291 route.mac & 0xffffffffffff; 292 prefix_value->ifindex = route.iface; 293 prefix_value->gw = route.gw; 294 prefix_value->metric = route.metric; 295 assert(bpf_map_update_elem(lpm_map_fd, 296 prefix_key, 297 prefix_value, 298 0) == 0); 299 } 300 } 301 } 302 memset(&route, 0, sizeof(route)); 303 memset(dsts, 0, sizeof(dsts)); 304 memset(dsts_len, 0, sizeof(dsts_len)); 305 memset(gws, 0, sizeof(gws)); 306 memset(ifs, 0, sizeof(ifs)); 307 memset(&route, 0, sizeof(route)); 308 } 309 } 310 311 /* Function to read the existing route table when the process is launched*/ 312 static int get_route_table(int rtm_family) 313 { 314 struct sockaddr_nl sa; 315 struct nlmsghdr *nh; 316 int sock, seq = 0; 317 struct msghdr msg; 318 struct iovec iov; 319 int ret = 0; 320 int nll; 321 322 struct { 323 struct nlmsghdr nl; 324 struct rtmsg rt; 325 char buf[8192]; 326 } req; 327 328 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 329 if (sock < 0) { 330 printf("open netlink socket: %s\n", strerror(errno)); 331 return -1; 332 } 333 memset(&sa, 0, sizeof(sa)); 334 sa.nl_family = AF_NETLINK; 335 if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) { 336 printf("bind to netlink: %s\n", strerror(errno)); 337 ret = -1; 338 goto cleanup; 339 } 340 memset(&req, 0, sizeof(req)); 341 req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 342 req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; 343 req.nl.nlmsg_type = RTM_GETROUTE; 344 345 req.rt.rtm_family = rtm_family; 346 req.rt.rtm_table = RT_TABLE_MAIN; 347 req.nl.nlmsg_pid = 0; 348 req.nl.nlmsg_seq = ++seq; 349 memset(&msg, 0, sizeof(msg)); 350 iov.iov_base = (void *)&req.nl; 351 iov.iov_len = req.nl.nlmsg_len; 352 msg.msg_iov = &iov; 353 msg.msg_iovlen = 1; 354 ret = sendmsg(sock, &msg, 0); 355 if (ret < 0) { 356 printf("send to netlink: %s\n", strerror(errno)); 357 ret = -1; 358 goto cleanup; 359 } 360 memset(buf, 0, sizeof(buf)); 361 nll = recv_msg(sa, sock); 362 if (nll < 0) { 363 printf("recv from netlink: %s\n", strerror(nll)); 364 ret = -1; 365 goto cleanup; 366 } 367 nh = (struct nlmsghdr *)buf; 368 read_route(nh, nll); 369 cleanup: 370 close(sock); 371 return ret; 372 } 373 374 /* Function to parse the arp entry returned by netlink 375 * Updates the arp entry related map entries 376 */ 377 static void read_arp(struct nlmsghdr *nh, int nll) 378 { 379 struct rtattr *rt_attr; 380 char dsts[24], mac[24]; 381 struct ndmsg *rt_msg; 382 int rtl, ndm_family; 383 384 struct arp_table { 385 __be64 mac; 386 __be32 dst; 387 } arp_entry; 388 struct direct_map { 389 struct arp_table arp; 390 int ifindex; 391 __be64 mac; 392 } direct_entry; 393 394 if (nh->nlmsg_type == RTM_GETNEIGH) 395 printf("READING arp entry\n"); 396 printf("Address\tHwAddress\n"); 397 for (; NLMSG_OK(nh, nll); nh = NLMSG_NEXT(nh, nll)) { 398 rt_msg = (struct ndmsg *)NLMSG_DATA(nh); 399 rt_attr = (struct rtattr *)RTM_RTA(rt_msg); 400 ndm_family = rt_msg->ndm_family; 401 rtl = RTM_PAYLOAD(nh); 402 for (; RTA_OK(rt_attr, rtl); rt_attr = RTA_NEXT(rt_attr, rtl)) { 403 switch (rt_attr->rta_type) { 404 case NDA_DST: 405 sprintf(dsts, "%u", 406 *((__be32 *)RTA_DATA(rt_attr))); 407 break; 408 case NDA_LLADDR: 409 sprintf(mac, "%lld", 410 *((__be64 *)RTA_DATA(rt_attr))); 411 break; 412 default: 413 break; 414 } 415 } 416 arp_entry.dst = atoi(dsts); 417 arp_entry.mac = atol(mac); 418 printf("%x\t\t%llx\n", arp_entry.dst, arp_entry.mac); 419 if (ndm_family == AF_INET) { 420 if (bpf_map_lookup_elem(exact_match_map_fd, 421 &arp_entry.dst, 422 &direct_entry) == 0) { 423 if (nh->nlmsg_type == RTM_DELNEIGH) { 424 direct_entry.arp.dst = 0; 425 direct_entry.arp.mac = 0; 426 } else if (nh->nlmsg_type == RTM_NEWNEIGH) { 427 direct_entry.arp.dst = arp_entry.dst; 428 direct_entry.arp.mac = arp_entry.mac; 429 } 430 assert(bpf_map_update_elem(exact_match_map_fd, 431 &arp_entry.dst, 432 &direct_entry, 0 433 ) == 0); 434 memset(&direct_entry, 0, sizeof(direct_entry)); 435 } 436 if (nh->nlmsg_type == RTM_DELNEIGH) { 437 assert(bpf_map_delete_elem(arp_table_map_fd, 438 &arp_entry.dst) == 0); 439 } else if (nh->nlmsg_type == RTM_NEWNEIGH) { 440 assert(bpf_map_update_elem(arp_table_map_fd, 441 &arp_entry.dst, 442 &arp_entry.mac, 0 443 ) == 0); 444 } 445 } 446 memset(&arp_entry, 0, sizeof(arp_entry)); 447 memset(dsts, 0, sizeof(dsts)); 448 } 449 } 450 451 /* Function to read the existing arp table when the process is launched*/ 452 static int get_arp_table(int rtm_family) 453 { 454 struct sockaddr_nl sa; 455 struct nlmsghdr *nh; 456 int sock, seq = 0; 457 struct msghdr msg; 458 struct iovec iov; 459 int ret = 0; 460 int nll; 461 struct { 462 struct nlmsghdr nl; 463 struct ndmsg rt; 464 char buf[8192]; 465 } req; 466 467 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 468 if (sock < 0) { 469 printf("open netlink socket: %s\n", strerror(errno)); 470 return -1; 471 } 472 memset(&sa, 0, sizeof(sa)); 473 sa.nl_family = AF_NETLINK; 474 if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) { 475 printf("bind to netlink: %s\n", strerror(errno)); 476 ret = -1; 477 goto cleanup; 478 } 479 memset(&req, 0, sizeof(req)); 480 req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 481 req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; 482 req.nl.nlmsg_type = RTM_GETNEIGH; 483 req.rt.ndm_state = NUD_REACHABLE; 484 req.rt.ndm_family = rtm_family; 485 req.nl.nlmsg_pid = 0; 486 req.nl.nlmsg_seq = ++seq; 487 memset(&msg, 0, sizeof(msg)); 488 iov.iov_base = (void *)&req.nl; 489 iov.iov_len = req.nl.nlmsg_len; 490 msg.msg_iov = &iov; 491 msg.msg_iovlen = 1; 492 ret = sendmsg(sock, &msg, 0); 493 if (ret < 0) { 494 printf("send to netlink: %s\n", strerror(errno)); 495 ret = -1; 496 goto cleanup; 497 } 498 memset(buf, 0, sizeof(buf)); 499 nll = recv_msg(sa, sock); 500 if (nll < 0) { 501 printf("recv from netlink: %s\n", strerror(nll)); 502 ret = -1; 503 goto cleanup; 504 } 505 nh = (struct nlmsghdr *)buf; 506 read_arp(nh, nll); 507 cleanup: 508 close(sock); 509 return ret; 510 } 511 512 /* Function to keep track and update changes in route and arp table 513 * Give regular statistics of packets forwarded 514 */ 515 static int monitor_route(void) 516 { 517 unsigned int nr_cpus = bpf_num_possible_cpus(); 518 const unsigned int nr_keys = 256; 519 struct pollfd fds_route, fds_arp; 520 __u64 prev[nr_keys][nr_cpus]; 521 struct sockaddr_nl la, lr; 522 __u64 values[nr_cpus]; 523 struct nlmsghdr *nh; 524 int nll, ret = 0; 525 int interval = 5; 526 __u32 key; 527 int i; 528 529 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 530 if (sock < 0) { 531 printf("open netlink socket: %s\n", strerror(errno)); 532 return -1; 533 } 534 535 fcntl(sock, F_SETFL, O_NONBLOCK); 536 memset(&lr, 0, sizeof(lr)); 537 lr.nl_family = AF_NETLINK; 538 lr.nl_groups = RTMGRP_IPV6_ROUTE | RTMGRP_IPV4_ROUTE | RTMGRP_NOTIFY; 539 if (bind(sock, (struct sockaddr *)&lr, sizeof(lr)) < 0) { 540 printf("bind to netlink: %s\n", strerror(errno)); 541 ret = -1; 542 goto cleanup; 543 } 544 fds_route.fd = sock; 545 fds_route.events = POLL_IN; 546 547 sock_arp = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 548 if (sock_arp < 0) { 549 printf("open netlink socket: %s\n", strerror(errno)); 550 return -1; 551 } 552 553 fcntl(sock_arp, F_SETFL, O_NONBLOCK); 554 memset(&la, 0, sizeof(la)); 555 la.nl_family = AF_NETLINK; 556 la.nl_groups = RTMGRP_NEIGH | RTMGRP_NOTIFY; 557 if (bind(sock_arp, (struct sockaddr *)&la, sizeof(la)) < 0) { 558 printf("bind to netlink: %s\n", strerror(errno)); 559 ret = -1; 560 goto cleanup; 561 } 562 fds_arp.fd = sock_arp; 563 fds_arp.events = POLL_IN; 564 565 memset(prev, 0, sizeof(prev)); 566 do { 567 signal(SIGINT, close_and_exit); 568 signal(SIGTERM, close_and_exit); 569 570 sleep(interval); 571 for (key = 0; key < nr_keys; key++) { 572 __u64 sum = 0; 573 574 assert(bpf_map_lookup_elem(rxcnt_map_fd, 575 &key, values) == 0); 576 for (i = 0; i < nr_cpus; i++) 577 sum += (values[i] - prev[key][i]); 578 if (sum) 579 printf("proto %u: %10llu pkt/s\n", 580 key, sum / interval); 581 memcpy(prev[key], values, sizeof(values)); 582 } 583 584 memset(buf, 0, sizeof(buf)); 585 if (poll(&fds_route, 1, 3) == POLL_IN) { 586 nll = recv_msg(lr, sock); 587 if (nll < 0) { 588 printf("recv from netlink: %s\n", strerror(nll)); 589 ret = -1; 590 goto cleanup; 591 } 592 593 nh = (struct nlmsghdr *)buf; 594 printf("Routing table updated.\n"); 595 read_route(nh, nll); 596 } 597 memset(buf, 0, sizeof(buf)); 598 if (poll(&fds_arp, 1, 3) == POLL_IN) { 599 nll = recv_msg(la, sock_arp); 600 if (nll < 0) { 601 printf("recv from netlink: %s\n", strerror(nll)); 602 ret = -1; 603 goto cleanup; 604 } 605 606 nh = (struct nlmsghdr *)buf; 607 read_arp(nh, nll); 608 } 609 610 } while (1); 611 cleanup: 612 close(sock); 613 return ret; 614 } 615 616 static void usage(const char *prog) 617 { 618 fprintf(stderr, 619 "%s: %s [OPTS] interface name list\n\n" 620 "OPTS:\n" 621 " -S use skb-mode\n" 622 " -F force loading prog\n", 623 __func__, prog); 624 } 625 626 int main(int ac, char **argv) 627 { 628 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; 629 struct bpf_prog_load_attr prog_load_attr = { 630 .prog_type = BPF_PROG_TYPE_XDP, 631 }; 632 struct bpf_prog_info info = {}; 633 __u32 info_len = sizeof(info); 634 const char *optstr = "SF"; 635 struct bpf_object *obj; 636 char filename[256]; 637 char **ifname_list; 638 int prog_fd, opt; 639 int err, i = 1; 640 641 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); 642 prog_load_attr.file = filename; 643 644 total_ifindex = ac - 1; 645 ifname_list = (argv + 1); 646 647 while ((opt = getopt(ac, argv, optstr)) != -1) { 648 switch (opt) { 649 case 'S': 650 flags |= XDP_FLAGS_SKB_MODE; 651 total_ifindex--; 652 ifname_list++; 653 break; 654 case 'F': 655 flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; 656 total_ifindex--; 657 ifname_list++; 658 break; 659 default: 660 usage(basename(argv[0])); 661 return 1; 662 } 663 } 664 665 if (optind == ac) { 666 usage(basename(argv[0])); 667 return 1; 668 } 669 670 if (setrlimit(RLIMIT_MEMLOCK, &r)) { 671 perror("setrlimit(RLIMIT_MEMLOCK)"); 672 return 1; 673 } 674 675 if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) 676 return 1; 677 678 printf("\n**************loading bpf file*********************\n\n\n"); 679 if (!prog_fd) { 680 printf("bpf_prog_load_xattr: %s\n", strerror(errno)); 681 return 1; 682 } 683 684 lpm_map_fd = bpf_object__find_map_fd_by_name(obj, "lpm_map"); 685 rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); 686 arp_table_map_fd = bpf_object__find_map_fd_by_name(obj, "arp_table"); 687 exact_match_map_fd = bpf_object__find_map_fd_by_name(obj, 688 "exact_match"); 689 tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port"); 690 if (lpm_map_fd < 0 || rxcnt_map_fd < 0 || arp_table_map_fd < 0 || 691 exact_match_map_fd < 0 || tx_port_map_fd < 0) { 692 printf("bpf_object__find_map_fd_by_name failed\n"); 693 return 1; 694 } 695 696 ifindex_list = (int *)calloc(total_ifindex, sizeof(int *)); 697 for (i = 0; i < total_ifindex; i++) { 698 ifindex_list[i] = if_nametoindex(ifname_list[i]); 699 if (!ifindex_list[i]) { 700 printf("Couldn't translate interface name: %s", 701 strerror(errno)); 702 return 1; 703 } 704 } 705 prog_id_list = (__u32 *)calloc(total_ifindex, sizeof(__u32 *)); 706 for (i = 0; i < total_ifindex; i++) { 707 if (bpf_set_link_xdp_fd(ifindex_list[i], prog_fd, flags) < 0) { 708 printf("link set xdp fd failed\n"); 709 int recovery_index = i; 710 711 for (i = 0; i < recovery_index; i++) 712 bpf_set_link_xdp_fd(ifindex_list[i], -1, flags); 713 714 return 1; 715 } 716 err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); 717 if (err) { 718 printf("can't get prog info - %s\n", strerror(errno)); 719 return err; 720 } 721 prog_id_list[i] = info.id; 722 memset(&info, 0, sizeof(info)); 723 printf("Attached to %d\n", ifindex_list[i]); 724 } 725 signal(SIGINT, int_exit); 726 signal(SIGTERM, int_exit); 727 728 printf("*******************ROUTE TABLE*************************\n\n\n"); 729 get_route_table(AF_INET); 730 printf("*******************ARP TABLE***************************\n\n\n"); 731 get_arp_table(AF_INET); 732 if (monitor_route() < 0) { 733 printf("Error in receiving route update"); 734 return 1; 735 } 736 737 return 0; 738 } 739