tools/testing/selftests/net/reuseport_bpf.c

   1 /*
   2  * Test functionality of BPF filters for SO_REUSEPORT.  The tests below will use
   3  * a BPF program (both classic and extended) to read the first word from an
   4  * incoming packet (expected to be in network byte-order), calculate a modulus
   5  * of that number, and then dispatch the packet to the Nth socket using the
   6  * result.  These tests are run for each supported address family and protocol.
   7  * Additionally, a few edge cases in the implementation are tested.
   8  */
   9
  10 #include <errno.h>
  11 #include <error.h>
  12 #include <fcntl.h>
  13 #include <linux/bpf.h>
  14 #include <linux/filter.h>
  15 #include <linux/unistd.h>
  16 #include <netinet/in.h>
  17 #include <netinet/tcp.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <sys/epoll.h>
  22 #include <sys/types.h>
  23 #include <sys/socket.h>
  24 #include <unistd.h>
  25
  26 #ifndef ARRAY_SIZE
  27 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
  28 #endif
  29
  30 struct test_params {
  31         int recv_family;
  32         int send_family;
  33         int protocol;
  34         size_t recv_socks;
  35         uint16_t recv_port;
  36         uint16_t send_port_min;
  37 };
  38
  39 static size_t sockaddr_size(void)
  40 {
  41         return sizeof(struct sockaddr_storage);
  42 }
  43
  44 static struct sockaddr *new_any_sockaddr(int family, uint16_t port)
  45 {
  46         struct sockaddr_storage *addr;
  47         struct sockaddr_in *addr4;
  48         struct sockaddr_in6 *addr6;
  49
  50         addr = malloc(sizeof(struct sockaddr_storage));
  51         memset(addr, 0, sizeof(struct sockaddr_storage));
  52
  53         switch (family) {
  54         case AF_INET:
  55                 addr4 = (struct sockaddr_in *)addr;
  56                 addr4->sin_family = AF_INET;
  57                 addr4->sin_addr.s_addr = htonl(INADDR_ANY);
  58                 addr4->sin_port = htons(port);
  59                 break;
  60         case AF_INET6:
  61                 addr6 = (struct sockaddr_in6 *)addr;
  62                 addr6->sin6_family = AF_INET6;
  63                 addr6->sin6_addr = in6addr_any;
  64                 addr6->sin6_port = htons(port);
  65                 break;
  66         default:
  67                 error(1, 0, "Unsupported family %d", family);
  68         }
  69         return (struct sockaddr *)addr;
  70 }
  71
  72 static struct sockaddr *new_loopback_sockaddr(int family, uint16_t port)
  73 {
  74         struct sockaddr *addr = new_any_sockaddr(family, port);
  75         struct sockaddr_in *addr4;
  76         struct sockaddr_in6 *addr6;
  77
  78         switch (family) {
  79         case AF_INET:
  80                 addr4 = (struct sockaddr_in *)addr;
  81                 addr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
  82                 break;
  83         case AF_INET6:
  84                 addr6 = (struct sockaddr_in6 *)addr;
  85                 addr6->sin6_addr = in6addr_loopback;
  86                 break;
  87         default:
  88                 error(1, 0, "Unsupported family %d", family);
  89         }
  90         return addr;
  91 }
  92
  93 static void attach_ebpf(int fd, uint16_t mod)
  94 {
  95         static char bpf_log_buf[65536];
  96         static const char bpf_license[] = "GPL";
  97
  98         int bpf_fd;
  99         const struct bpf_insn prog[] = {
 100                 /* BPF_MOV64_REG(BPF_REG_6, BPF_REG_1) */
 101                 { BPF_ALU64 | BPF_MOV | BPF_X, BPF_REG_6, BPF_REG_1, 0, 0 },
 102                 /* BPF_LD_ABS(BPF_W, 0) R0 = (uint32_t)skb[0] */
 103                 { BPF_LD | BPF_ABS | BPF_W, 0, 0, 0, 0 },
 104                 /* BPF_ALU64_IMM(BPF_MOD, BPF_REG_0, mod) */
 105                 { BPF_ALU64 | BPF_MOD | BPF_K, BPF_REG_0, 0, 0, mod },
 106                 /* BPF_EXIT_INSN() */
 107                 { BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
 108         };
 109         union bpf_attr attr;
 110
 111         memset(&attr, 0, sizeof(attr));
 112         attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
 113         attr.insn_cnt = ARRAY_SIZE(prog);
 114         attr.insns = (uint64_t)prog;
 115         attr.license = (uint64_t)bpf_license;
 116         attr.log_buf = (uint64_t)bpf_log_buf;
 117         attr.log_size = sizeof(bpf_log_buf);
 118         attr.log_level = 1;
 119         attr.kern_version = 0;
 120
 121         bpf_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
 122         if (bpf_fd < 0)
 123                 error(1, errno, "ebpf error. log:\n%s\n", bpf_log_buf);
 124
 125         if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &bpf_fd,
 126                         sizeof(bpf_fd)))
 127                 error(1, errno, "failed to set SO_ATTACH_REUSEPORT_EBPF");
 128
 129         close(bpf_fd);
 130 }
 131
 132 static void attach_cbpf(int fd, uint16_t mod)
 133 {
 134         struct sock_filter code[] = {
 135                 /* A = (uint32_t)skb[0] */
 136                 { BPF_LD  | BPF_W | BPF_ABS, 0, 0, 0 },
 137                 /* A = A % mod */
 138                 { BPF_ALU | BPF_MOD, 0, 0, mod },
 139                 /* return A */
 140                 { BPF_RET | BPF_A, 0, 0, 0 },
 141         };
 142         struct sock_fprog p = {
 143                 .len = ARRAY_SIZE(code),
 144                 .filter = code,
 145         };
 146
 147         if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_CBPF, &p, sizeof(p)))
 148                 error(1, errno, "failed to set SO_ATTACH_REUSEPORT_CBPF");
 149 }
 150
 151 static void build_recv_group(const struct test_params p, int fd[], uint16_t mod,
 152                              void (*attach_bpf)(int, uint16_t))
 153 {
 154         struct sockaddr * const addr =
 155                 new_any_sockaddr(p.recv_family, p.recv_port);
 156         int i, opt;
 157
 158         for (i = 0; i < p.recv_socks; ++i) {
 159                 fd[i] = socket(p.recv_family, p.protocol, 0);
 160                 if (fd[i] < 0)
 161                         error(1, errno, "failed to create recv %d", i);
 162
 163                 opt = 1;
 164                 if (setsockopt(fd[i], SOL_SOCKET, SO_REUSEPORT, &opt,
 165                                sizeof(opt)))
 166                         error(1, errno, "failed to set SO_REUSEPORT on %d", i);
 167
 168                 if (i == 0)
 169                         attach_bpf(fd[i], mod);
 170
 171                 if (bind(fd[i], addr, sockaddr_size()))
 172                         error(1, errno, "failed to bind recv socket %d", i);
 173
 174                 if (p.protocol == SOCK_STREAM) {
 175                         opt = 4;
 176                         if (setsockopt(fd[i], SOL_TCP, TCP_FASTOPEN, &opt,
 177                                        sizeof(opt)))
 178                                 error(1, errno,
 179                                       "failed to set TCP_FASTOPEN on %d", i);
 180                         if (listen(fd[i], p.recv_socks * 10))
 181                                 error(1, errno, "failed to listen on socket");
 182                 }
 183         }
 184         free(addr);
 185 }
 186
 187 static void send_from(struct test_params p, uint16_t sport, char *buf,
 188                       size_t len)
 189 {
 190         struct sockaddr * const saddr = new_any_sockaddr(p.send_family, sport);
 191         struct sockaddr * const daddr =
 192                 new_loopback_sockaddr(p.send_family, p.recv_port);
 193         const int fd = socket(p.send_family, p.protocol, 0);
 194
 195         if (fd < 0)
 196                 error(1, errno, "failed to create send socket");
 197
 198         if (bind(fd, saddr, sockaddr_size()))
 199                 error(1, errno, "failed to bind send socket");
 200
 201         if (sendto(fd, buf, len, MSG_FASTOPEN, daddr, sockaddr_size()) < 0)
 202                 error(1, errno, "failed to send message");
 203
 204         close(fd);
 205         free(saddr);
 206         free(daddr);
 207 }
 208
 209 static void test_recv_order(const struct test_params p, int fd[], int mod)
 210 {
 211         char recv_buf[8], send_buf[8];
 212         struct msghdr msg;
 213         struct iovec recv_io = { recv_buf, 8 };
 214         struct epoll_event ev;
 215         int epfd, conn, i, sport, expected;
 216         uint32_t data, ndata;
 217
 218         epfd = epoll_create(1);
 219         if (epfd < 0)
 220                 error(1, errno, "failed to create epoll");
 221         for (i = 0; i < p.recv_socks; ++i) {
 222                 ev.events = EPOLLIN;
 223                 ev.data.fd = fd[i];
 224                 if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd[i], &ev))
 225                         error(1, errno, "failed to register sock %d epoll", i);
 226         }
 227
 228         memset(&msg, 0, sizeof(msg));
 229         msg.msg_iov = &recv_io;
 230         msg.msg_iovlen = 1;
 231
 232         for (data = 0; data < p.recv_socks * 2; ++data) {
 233                 sport = p.send_port_min + data;
 234                 ndata = htonl(data);
 235                 memcpy(send_buf, &ndata, sizeof(ndata));
 236                 send_from(p, sport, send_buf, sizeof(ndata));
 237
 238                 i = epoll_wait(epfd, &ev, 1, -1);
 239                 if (i < 0)
 240                         error(1, errno, "epoll wait failed");
 241
 242                 if (p.protocol == SOCK_STREAM) {
 243                         conn = accept(ev.data.fd, NULL, NULL);
 244                         if (conn < 0)
 245                                 error(1, errno, "error accepting");
 246                         i = recvmsg(conn, &msg, 0);
 247                         close(conn);
 248                 } else {
 249                         i = recvmsg(ev.data.fd, &msg, 0);
 250                 }
 251                 if (i < 0)
 252                         error(1, errno, "recvmsg error");
 253                 if (i != sizeof(ndata))
 254                         error(1, 0, "expected size %zd got %d",
 255                               sizeof(ndata), i);
 256
 257                 for (i = 0; i < p.recv_socks; ++i)
 258                         if (ev.data.fd == fd[i])
 259                                 break;
 260                 memcpy(&ndata, recv_buf, sizeof(ndata));
 261                 fprintf(stderr, "Socket %d: %d\n", i, ntohl(ndata));
 262
 263                 expected = (sport % mod);
 264                 if (i != expected)
 265                         error(1, 0, "expected socket %d", expected);
 266         }
 267 }
 268
 269 static void test_reuseport_ebpf(struct test_params p)
 270 {
 271         int i, fd[p.recv_socks];
 272
 273         fprintf(stderr, "Testing EBPF mod %zd...\n", p.recv_socks);
 274         build_recv_group(p, fd, p.recv_socks, attach_ebpf);
 275         test_recv_order(p, fd, p.recv_socks);
 276
 277         p.send_port_min += p.recv_socks * 2;
 278         fprintf(stderr, "Reprograming, testing mod %zd...\n", p.recv_socks / 2);
 279         attach_ebpf(fd[0], p.recv_socks / 2);
 280         test_recv_order(p, fd, p.recv_socks / 2);
 281
 282         for (i = 0; i < p.recv_socks; ++i)
 283                 close(fd[i]);
 284 }
 285
 286 static void test_reuseport_cbpf(struct test_params p)
 287 {
 288         int i, fd[p.recv_socks];
 289
 290         fprintf(stderr, "Testing CBPF mod %zd...\n", p.recv_socks);
 291         build_recv_group(p, fd, p.recv_socks, attach_cbpf);
 292         test_recv_order(p, fd, p.recv_socks);
 293
 294         p.send_port_min += p.recv_socks * 2;
 295         fprintf(stderr, "Reprograming, testing mod %zd...\n", p.recv_socks / 2);
 296         attach_cbpf(fd[0], p.recv_socks / 2);
 297         test_recv_order(p, fd, p.recv_socks / 2);
 298
 299         for (i = 0; i < p.recv_socks; ++i)
 300                 close(fd[i]);
 301 }
 302
 303 static void test_extra_filter(const struct test_params p)
 304 {
 305         struct sockaddr * const addr =
 306                 new_any_sockaddr(p.recv_family, p.recv_port);
 307         int fd1, fd2, opt;
 308
 309         fprintf(stderr, "Testing too many filters...\n");
 310         fd1 = socket(p.recv_family, p.protocol, 0);
 311         if (fd1 < 0)
 312                 error(1, errno, "failed to create socket 1");
 313         fd2 = socket(p.recv_family, p.protocol, 0);
 314         if (fd2 < 0)
 315                 error(1, errno, "failed to create socket 2");
 316
 317         opt = 1;
 318         if (setsockopt(fd1, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
 319                 error(1, errno, "failed to set SO_REUSEPORT on socket 1");
 320         if (setsockopt(fd2, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
 321                 error(1, errno, "failed to set SO_REUSEPORT on socket 2");
 322
 323         attach_ebpf(fd1, 10);
 324         attach_ebpf(fd2, 10);
 325
 326         if (bind(fd1, addr, sockaddr_size()))
 327                 error(1, errno, "failed to bind recv socket 1");
 328
 329         if (!bind(fd2, addr, sockaddr_size()) && errno != EADDRINUSE)
 330                 error(1, errno, "bind socket 2 should fail with EADDRINUSE");
 331
 332         free(addr);
 333 }
 334
 335 static void test_filter_no_reuseport(const struct test_params p)
 336 {
 337         struct sockaddr * const addr =
 338                 new_any_sockaddr(p.recv_family, p.recv_port);
 339         const char bpf_license[] = "GPL";
 340         struct bpf_insn ecode[] = {
 341                 { BPF_ALU64 | BPF_MOV | BPF_K, BPF_REG_0, 0, 0, 10 },
 342                 { BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
 343         };
 344         struct sock_filter ccode[] = {{ BPF_RET | BPF_A, 0, 0, 0 }};
 345         union bpf_attr eprog;
 346         struct sock_fprog cprog;
 347         int fd, bpf_fd;
 348
 349         fprintf(stderr, "Testing filters on non-SO_REUSEPORT socket...\n");
 350
 351         memset(&eprog, 0, sizeof(eprog));
 352         eprog.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
 353         eprog.insn_cnt = ARRAY_SIZE(ecode);
 354         eprog.insns = (uint64_t)ecode;
 355         eprog.license = (uint64_t)bpf_license;
 356         eprog.kern_version = 0;
 357
 358         memset(&cprog, 0, sizeof(cprog));
 359         cprog.len = ARRAY_SIZE(ccode);
 360         cprog.filter = ccode;
 361
 362
 363         bpf_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &eprog, sizeof(eprog));
 364         if (bpf_fd < 0)
 365                 error(1, errno, "ebpf error");
 366         fd = socket(p.recv_family, p.protocol, 0);
 367         if (fd < 0)
 368                 error(1, errno, "failed to create socket 1");
 369
 370         if (bind(fd, addr, sockaddr_size()))
 371                 error(1, errno, "failed to bind recv socket 1");
 372
 373         errno = 0;
 374         if (!setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &bpf_fd,
 375                         sizeof(bpf_fd)) || errno != EINVAL)
 376                 error(1, errno, "setsockopt should have returned EINVAL");
 377
 378         errno = 0;
 379         if (!setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_CBPF, &cprog,
 380                        sizeof(cprog)) || errno != EINVAL)
 381                 error(1, errno, "setsockopt should have returned EINVAL");
 382
 383         free(addr);
 384 }
 385
 386 static void test_filter_without_bind(void)
 387 {
 388         int fd1, fd2, opt = 1;
 389
 390         fprintf(stderr, "Testing filter add without bind...\n");
 391         fd1 = socket(AF_INET, SOCK_DGRAM, 0);
 392         if (fd1 < 0)
 393                 error(1, errno, "failed to create socket 1");
 394         fd2 = socket(AF_INET, SOCK_DGRAM, 0);
 395         if (fd2 < 0)
 396                 error(1, errno, "failed to create socket 2");
 397         if (setsockopt(fd1, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
 398                 error(1, errno, "failed to set SO_REUSEPORT on socket 1");
 399         if (setsockopt(fd2, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
 400                 error(1, errno, "failed to set SO_REUSEPORT on socket 2");
 401
 402         attach_ebpf(fd1, 10);
 403         attach_cbpf(fd2, 10);
 404
 405         close(fd1);
 406         close(fd2);
 407 }
 408
 409 void enable_fastopen(void)
 410 {
 411         int fd = open("/proc/sys/net/ipv4/tcp_fastopen", 0);
 412         int rw_mask = 3;  /* bit 1: client side; bit-2 server side */
 413         int val, size;
 414         char buf[16];
 415
 416         if (fd < 0)
 417                 error(1, errno, "Unable to open tcp_fastopen sysctl");
 418         if (read(fd, buf, sizeof(buf)) <= 0)
 419                 error(1, errno, "Unable to read tcp_fastopen sysctl");
 420         val = atoi(buf);
 421         close(fd);
 422
 423         if ((val & rw_mask) != rw_mask) {
 424                 fd = open("/proc/sys/net/ipv4/tcp_fastopen", O_RDWR);
 425                 if (fd < 0)
 426                         error(1, errno,
 427                               "Unable to open tcp_fastopen sysctl for writing");
 428                 val |= rw_mask;
 429                 size = snprintf(buf, 16, "%d", val);
 430                 if (write(fd, buf, size) <= 0)
 431                         error(1, errno, "Unable to write tcp_fastopen sysctl");
 432                 close(fd);
 433         }
 434 }
 435
 436 int main(void)
 437 {
 438         fprintf(stderr, "---- IPv4 UDP ----\n");
 439         /* NOTE: UDP socket lookups traverse a different code path when there
 440          * are > 10 sockets in a group.  Run the bpf test through both paths.
 441          */
 442         test_reuseport_ebpf((struct test_params) {
 443                 .recv_family = AF_INET,
 444                 .send_family = AF_INET,
 445                 .protocol = SOCK_DGRAM,
 446                 .recv_socks = 10,
 447                 .recv_port = 8000,
 448                 .send_port_min = 9000});
 449         test_reuseport_ebpf((struct test_params) {
 450                 .recv_family = AF_INET,
 451                 .send_family = AF_INET,
 452                 .protocol = SOCK_DGRAM,
 453                 .recv_socks = 20,
 454                 .recv_port = 8000,
 455                 .send_port_min = 9000});
 456         test_reuseport_cbpf((struct test_params) {
 457                 .recv_family = AF_INET,
 458                 .send_family = AF_INET,
 459                 .protocol = SOCK_DGRAM,
 460                 .recv_socks = 10,
 461                 .recv_port = 8001,
 462                 .send_port_min = 9020});
 463         test_reuseport_cbpf((struct test_params) {
 464                 .recv_family = AF_INET,
 465                 .send_family = AF_INET,
 466                 .protocol = SOCK_DGRAM,
 467                 .recv_socks = 20,
 468                 .recv_port = 8001,
 469                 .send_port_min = 9020});
 470         test_extra_filter((struct test_params) {
 471                 .recv_family = AF_INET,
 472                 .protocol = SOCK_DGRAM,
 473                 .recv_port = 8002});
 474         test_filter_no_reuseport((struct test_params) {
 475                 .recv_family = AF_INET,
 476                 .protocol = SOCK_DGRAM,
 477                 .recv_port = 8008});
 478
 479         fprintf(stderr, "---- IPv6 UDP ----\n");
 480         test_reuseport_ebpf((struct test_params) {
 481                 .recv_family = AF_INET6,
 482                 .send_family = AF_INET6,
 483                 .protocol = SOCK_DGRAM,
 484                 .recv_socks = 10,
 485                 .recv_port = 8003,
 486                 .send_port_min = 9040});
 487         test_reuseport_ebpf((struct test_params) {
 488                 .recv_family = AF_INET6,
 489                 .send_family = AF_INET6,
 490                 .protocol = SOCK_DGRAM,
 491                 .recv_socks = 20,
 492                 .recv_port = 8003,
 493                 .send_port_min = 9040});
 494         test_reuseport_cbpf((struct test_params) {
 495                 .recv_family = AF_INET6,
 496                 .send_family = AF_INET6,
 497                 .protocol = SOCK_DGRAM,
 498                 .recv_socks = 10,
 499                 .recv_port = 8004,
 500                 .send_port_min = 9060});
 501         test_reuseport_cbpf((struct test_params) {
 502                 .recv_family = AF_INET6,
 503                 .send_family = AF_INET6,
 504                 .protocol = SOCK_DGRAM,
 505                 .recv_socks = 20,
 506                 .recv_port = 8004,
 507                 .send_port_min = 9060});
 508         test_extra_filter((struct test_params) {
 509                 .recv_family = AF_INET6,
 510                 .protocol = SOCK_DGRAM,
 511                 .recv_port = 8005});
 512         test_filter_no_reuseport((struct test_params) {
 513                 .recv_family = AF_INET6,
 514                 .protocol = SOCK_DGRAM,
 515                 .recv_port = 8009});
 516
 517         fprintf(stderr, "---- IPv6 UDP w/ mapped IPv4 ----\n");
 518         test_reuseport_ebpf((struct test_params) {
 519                 .recv_family = AF_INET6,
 520                 .send_family = AF_INET,
 521                 .protocol = SOCK_DGRAM,
 522                 .recv_socks = 20,
 523                 .recv_port = 8006,
 524                 .send_port_min = 9080});
 525         test_reuseport_ebpf((struct test_params) {
 526                 .recv_family = AF_INET6,
 527                 .send_family = AF_INET,
 528                 .protocol = SOCK_DGRAM,
 529                 .recv_socks = 10,
 530                 .recv_port = 8006,
 531                 .send_port_min = 9080});
 532         test_reuseport_cbpf((struct test_params) {
 533                 .recv_family = AF_INET6,
 534                 .send_family = AF_INET,
 535                 .protocol = SOCK_DGRAM,
 536                 .recv_socks = 10,
 537                 .recv_port = 8007,
 538                 .send_port_min = 9100});
 539         test_reuseport_cbpf((struct test_params) {
 540                 .recv_family = AF_INET6,
 541                 .send_family = AF_INET,
 542                 .protocol = SOCK_DGRAM,
 543                 .recv_socks = 20,
 544                 .recv_port = 8007,
 545                 .send_port_min = 9100});
 546
 547         /* TCP fastopen is required for the TCP tests */
 548         enable_fastopen();
 549         fprintf(stderr, "---- IPv4 TCP ----\n");
 550         test_reuseport_ebpf((struct test_params) {
 551                 .recv_family = AF_INET,
 552                 .send_family = AF_INET,
 553                 .protocol = SOCK_STREAM,
 554                 .recv_socks = 10,
 555                 .recv_port = 8008,
 556                 .send_port_min = 9120});
 557         test_reuseport_cbpf((struct test_params) {
 558                 .recv_family = AF_INET,
 559                 .send_family = AF_INET,
 560                 .protocol = SOCK_STREAM,
 561                 .recv_socks = 10,
 562                 .recv_port = 8009,
 563                 .send_port_min = 9160});
 564         test_extra_filter((struct test_params) {
 565                 .recv_family = AF_INET,
 566                 .protocol = SOCK_STREAM,
 567                 .recv_port = 8010});
 568         test_filter_no_reuseport((struct test_params) {
 569                 .recv_family = AF_INET,
 570                 .protocol = SOCK_STREAM,
 571                 .recv_port = 8011});
 572
 573         fprintf(stderr, "---- IPv6 TCP ----\n");
 574         test_reuseport_ebpf((struct test_params) {
 575                 .recv_family = AF_INET6,
 576                 .send_family = AF_INET6,
 577                 .protocol = SOCK_STREAM,
 578                 .recv_socks = 10,
 579                 .recv_port = 8012,
 580                 .send_port_min = 9200});
 581         test_reuseport_cbpf((struct test_params) {
 582                 .recv_family = AF_INET6,
 583                 .send_family = AF_INET6,
 584                 .protocol = SOCK_STREAM,
 585                 .recv_socks = 10,
 586                 .recv_port = 8013,
 587                 .send_port_min = 9240});
 588         test_extra_filter((struct test_params) {
 589                 .recv_family = AF_INET6,
 590                 .protocol = SOCK_STREAM,
 591                 .recv_port = 8014});
 592         test_filter_no_reuseport((struct test_params) {
 593                 .recv_family = AF_INET6,
 594                 .protocol = SOCK_STREAM,
 595                 .recv_port = 8015});
 596
 597         fprintf(stderr, "---- IPv6 TCP w/ mapped IPv4 ----\n");
 598         test_reuseport_ebpf((struct test_params) {
 599                 .recv_family = AF_INET6,
 600                 .send_family = AF_INET,
 601                 .protocol = SOCK_STREAM,
 602                 .recv_socks = 10,
 603                 .recv_port = 8016,
 604                 .send_port_min = 9320});
 605         test_reuseport_cbpf((struct test_params) {
 606                 .recv_family = AF_INET6,
 607                 .send_family = AF_INET,
 608                 .protocol = SOCK_STREAM,
 609                 .recv_socks = 10,
 610                 .recv_port = 8017,
 611                 .send_port_min = 9360});
 612
 613         test_filter_without_bind();
 614
 615         fprintf(stderr, "SUCCESS\n");
 616         return 0;
 617 }