tools/testing/selftests/net/udpgso.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #define _GNU_SOURCE
   4
   5 #include <stddef.h>
   6 #include <arpa/inet.h>
   7 #include <error.h>
   8 #include <errno.h>
   9 #include <net/if.h>
  10 #include <linux/in.h>
  11 #include <linux/netlink.h>
  12 #include <linux/rtnetlink.h>
  13 #include <netinet/if_ether.h>
  14 #include <netinet/ip.h>
  15 #include <netinet/ip6.h>
  16 #include <netinet/udp.h>
  17 #include <stdbool.h>
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <sys/ioctl.h>
  23 #include <sys/socket.h>
  24 #include <sys/stat.h>
  25 #include <sys/time.h>
  26 #include <sys/types.h>
  27 #include <unistd.h>
  28
  29 #ifndef ETH_MAX_MTU
  30 #define ETH_MAX_MTU     0xFFFFU
  31 #endif
  32
  33 #ifndef UDP_SEGMENT
  34 #define UDP_SEGMENT             103
  35 #endif
  36
  37 #ifndef UDP_MAX_SEGMENTS
  38 #define UDP_MAX_SEGMENTS        (1 << 6UL)
  39 #endif
  40
  41 #define CONST_MTU_TEST  1500
  42
  43 #define CONST_HDRLEN_V4         (sizeof(struct iphdr) + sizeof(struct udphdr))
  44 #define CONST_HDRLEN_V6         (sizeof(struct ip6_hdr) + sizeof(struct udphdr))
  45
  46 #define CONST_MSS_V4            (CONST_MTU_TEST - CONST_HDRLEN_V4)
  47 #define CONST_MSS_V6            (CONST_MTU_TEST - CONST_HDRLEN_V6)
  48
  49 #define CONST_MAX_SEGS_V4       (ETH_MAX_MTU / CONST_MSS_V4)
  50 #define CONST_MAX_SEGS_V6       (ETH_MAX_MTU / CONST_MSS_V6)
  51
  52 static bool             cfg_do_ipv4;
  53 static bool             cfg_do_ipv6;
  54 static bool             cfg_do_connected;
  55 static bool             cfg_do_connectionless;
  56 static bool             cfg_do_msgmore;
  57 static bool             cfg_do_setsockopt;
  58 static int              cfg_specific_test_id = -1;
  59
  60 static const char       cfg_ifname[] = "lo";
  61 static unsigned short   cfg_port = 9000;
  62
  63 static char buf[ETH_MAX_MTU];
  64
  65 struct testcase {
  66         int tlen;               /* send() buffer size, may exceed mss */
  67         bool tfail;             /* send() call is expected to fail */
  68         int gso_len;            /* mss after applying gso */
  69         int r_num_mss;          /* recv(): number of calls of full mss */
  70         int r_len_last;         /* recv(): size of last non-mss dgram, if any */
  71 };
  72
  73 const struct in6_addr addr6 = IN6ADDR_LOOPBACK_INIT;
  74 const struct in_addr addr4 = { .s_addr = __constant_htonl(INADDR_LOOPBACK + 2) };
  75
  76 struct testcase testcases_v4[] = {
  77         {
  78                 /* no GSO: send a single byte */
  79                 .tlen = 1,
  80                 .r_len_last = 1,
  81         },
  82         {
  83                 /* no GSO: send a single MSS */
  84                 .tlen = CONST_MSS_V4,
  85                 .r_num_mss = 1,
  86         },
  87         {
  88                 /* no GSO: send a single MSS + 1B: fail */
  89                 .tlen = CONST_MSS_V4 + 1,
  90                 .tfail = true,
  91         },
  92         {
  93                 /* send a single MSS: will fall back to no GSO */
  94                 .tlen = CONST_MSS_V4,
  95                 .gso_len = CONST_MSS_V4,
  96                 .r_num_mss = 1,
  97         },
  98         {
  99                 /* send a single MSS + 1B */
 100                 .tlen = CONST_MSS_V4 + 1,
 101                 .gso_len = CONST_MSS_V4,
 102                 .r_num_mss = 1,
 103                 .r_len_last = 1,
 104         },
 105         {
 106                 /* send exactly 2 MSS */
 107                 .tlen = CONST_MSS_V4 * 2,
 108                 .gso_len = CONST_MSS_V4,
 109                 .r_num_mss = 2,
 110         },
 111         {
 112                 /* send 2 MSS + 1B */
 113                 .tlen = (CONST_MSS_V4 * 2) + 1,
 114                 .gso_len = CONST_MSS_V4,
 115                 .r_num_mss = 2,
 116                 .r_len_last = 1,
 117         },
 118         {
 119                 /* send MAX segs */
 120                 .tlen = (ETH_MAX_MTU / CONST_MSS_V4) * CONST_MSS_V4,
 121                 .gso_len = CONST_MSS_V4,
 122                 .r_num_mss = (ETH_MAX_MTU / CONST_MSS_V4),
 123         },
 124
 125         {
 126                 /* send MAX bytes */
 127                 .tlen = ETH_MAX_MTU - CONST_HDRLEN_V4,
 128                 .gso_len = CONST_MSS_V4,
 129                 .r_num_mss = CONST_MAX_SEGS_V4,
 130                 .r_len_last = ETH_MAX_MTU - CONST_HDRLEN_V4 -
 131                               (CONST_MAX_SEGS_V4 * CONST_MSS_V4),
 132         },
 133         {
 134                 /* send MAX + 1: fail */
 135                 .tlen = ETH_MAX_MTU - CONST_HDRLEN_V4 + 1,
 136                 .gso_len = CONST_MSS_V4,
 137                 .tfail = true,
 138         },
 139         {
 140                 /* send a single 1B MSS: will fall back to no GSO */
 141                 .tlen = 1,
 142                 .gso_len = 1,
 143                 .r_num_mss = 1,
 144         },
 145         {
 146                 /* send 2 1B segments */
 147                 .tlen = 2,
 148                 .gso_len = 1,
 149                 .r_num_mss = 2,
 150         },
 151         {
 152                 /* send 2B + 2B + 1B segments */
 153                 .tlen = 5,
 154                 .gso_len = 2,
 155                 .r_num_mss = 2,
 156                 .r_len_last = 1,
 157         },
 158         {
 159                 /* send max number of min sized segments */
 160                 .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V4,
 161                 .gso_len = 1,
 162                 .r_num_mss = UDP_MAX_SEGMENTS - CONST_HDRLEN_V4,
 163         },
 164         {
 165                 /* send max number + 1 of min sized segments: fail */
 166                 .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V4 + 1,
 167                 .gso_len = 1,
 168                 .tfail = true,
 169         },
 170         {
 171                 /* EOL */
 172         }
 173 };
 174
 175 #ifndef IP6_MAX_MTU
 176 #define IP6_MAX_MTU     (ETH_MAX_MTU + sizeof(struct ip6_hdr))
 177 #endif
 178
 179 struct testcase testcases_v6[] = {
 180         {
 181                 /* no GSO: send a single byte */
 182                 .tlen = 1,
 183                 .r_len_last = 1,
 184         },
 185         {
 186                 /* no GSO: send a single MSS */
 187                 .tlen = CONST_MSS_V6,
 188                 .r_num_mss = 1,
 189         },
 190         {
 191                 /* no GSO: send a single MSS + 1B: fail */
 192                 .tlen = CONST_MSS_V6 + 1,
 193                 .tfail = true,
 194         },
 195         {
 196                 /* send a single MSS: will fall back to no GSO */
 197                 .tlen = CONST_MSS_V6,
 198                 .gso_len = CONST_MSS_V6,
 199                 .r_num_mss = 1,
 200         },
 201         {
 202                 /* send a single MSS + 1B */
 203                 .tlen = CONST_MSS_V6 + 1,
 204                 .gso_len = CONST_MSS_V6,
 205                 .r_num_mss = 1,
 206                 .r_len_last = 1,
 207         },
 208         {
 209                 /* send exactly 2 MSS */
 210                 .tlen = CONST_MSS_V6 * 2,
 211                 .gso_len = CONST_MSS_V6,
 212                 .r_num_mss = 2,
 213         },
 214         {
 215                 /* send 2 MSS + 1B */
 216                 .tlen = (CONST_MSS_V6 * 2) + 1,
 217                 .gso_len = CONST_MSS_V6,
 218                 .r_num_mss = 2,
 219                 .r_len_last = 1,
 220         },
 221         {
 222                 /* send MAX segs */
 223                 .tlen = (IP6_MAX_MTU / CONST_MSS_V6) * CONST_MSS_V6,
 224                 .gso_len = CONST_MSS_V6,
 225                 .r_num_mss = (IP6_MAX_MTU / CONST_MSS_V6),
 226         },
 227
 228         {
 229                 /* send MAX bytes */
 230                 .tlen = IP6_MAX_MTU - CONST_HDRLEN_V6,
 231                 .gso_len = CONST_MSS_V6,
 232                 .r_num_mss = CONST_MAX_SEGS_V6,
 233                 .r_len_last = IP6_MAX_MTU - CONST_HDRLEN_V6 -
 234                               (CONST_MAX_SEGS_V6 * CONST_MSS_V6),
 235         },
 236         {
 237                 /* send MAX + 1: fail */
 238                 .tlen = IP6_MAX_MTU - CONST_HDRLEN_V6 + 1,
 239                 .gso_len = CONST_MSS_V6,
 240                 .tfail = true,
 241         },
 242         {
 243                 /* send a single 1B MSS: will fall back to no GSO */
 244                 .tlen = 1,
 245                 .gso_len = 1,
 246                 .r_num_mss = 1,
 247         },
 248         {
 249                 /* send 2 1B segments */
 250                 .tlen = 2,
 251                 .gso_len = 1,
 252                 .r_num_mss = 2,
 253         },
 254         {
 255                 /* send 2B + 2B + 1B segments */
 256                 .tlen = 5,
 257                 .gso_len = 2,
 258                 .r_num_mss = 2,
 259                 .r_len_last = 1,
 260         },
 261         {
 262                 /* send max number of min sized segments */
 263                 .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V6,
 264                 .gso_len = 1,
 265                 .r_num_mss = UDP_MAX_SEGMENTS - CONST_HDRLEN_V6,
 266         },
 267         {
 268                 /* send max number + 1 of min sized segments: fail */
 269                 .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V6 + 1,
 270                 .gso_len = 1,
 271                 .tfail = true,
 272         },
 273         {
 274                 /* EOL */
 275         }
 276 };
 277
 278 static unsigned int get_device_mtu(int fd, const char *ifname)
 279 {
 280         struct ifreq ifr;
 281
 282         memset(&ifr, 0, sizeof(ifr));
 283
 284         strcpy(ifr.ifr_name, ifname);
 285
 286         if (ioctl(fd, SIOCGIFMTU, &ifr))
 287                 error(1, errno, "ioctl get mtu");
 288
 289         return ifr.ifr_mtu;
 290 }
 291
 292 static void __set_device_mtu(int fd, const char *ifname, unsigned int mtu)
 293 {
 294         struct ifreq ifr;
 295
 296         memset(&ifr, 0, sizeof(ifr));
 297
 298         ifr.ifr_mtu = mtu;
 299         strcpy(ifr.ifr_name, ifname);
 300
 301         if (ioctl(fd, SIOCSIFMTU, &ifr))
 302                 error(1, errno, "ioctl set mtu");
 303 }
 304
 305 static void set_device_mtu(int fd, int mtu)
 306 {
 307         int val;
 308
 309         val = get_device_mtu(fd, cfg_ifname);
 310         fprintf(stderr, "device mtu (orig): %u\n", val);
 311
 312         __set_device_mtu(fd, cfg_ifname, mtu);
 313         val = get_device_mtu(fd, cfg_ifname);
 314         if (val != mtu)
 315                 error(1, 0, "unable to set device mtu to %u\n", val);
 316
 317         fprintf(stderr, "device mtu (test): %u\n", val);
 318 }
 319
 320 static void set_pmtu_discover(int fd, bool is_ipv4)
 321 {
 322         int level, name, val;
 323
 324         if (is_ipv4) {
 325                 level   = SOL_IP;
 326                 name    = IP_MTU_DISCOVER;
 327                 val     = IP_PMTUDISC_DO;
 328         } else {
 329                 level   = SOL_IPV6;
 330                 name    = IPV6_MTU_DISCOVER;
 331                 val     = IPV6_PMTUDISC_DO;
 332         }
 333
 334         if (setsockopt(fd, level, name, &val, sizeof(val)))
 335                 error(1, errno, "setsockopt path mtu");
 336 }
 337
 338 static unsigned int get_path_mtu(int fd, bool is_ipv4)
 339 {
 340         socklen_t vallen;
 341         unsigned int mtu;
 342         int ret;
 343
 344         vallen = sizeof(mtu);
 345         if (is_ipv4)
 346                 ret = getsockopt(fd, SOL_IP, IP_MTU, &mtu, &vallen);
 347         else
 348                 ret = getsockopt(fd, SOL_IPV6, IPV6_MTU, &mtu, &vallen);
 349
 350         if (ret)
 351                 error(1, errno, "getsockopt mtu");
 352
 353
 354         fprintf(stderr, "path mtu (read):  %u\n", mtu);
 355         return mtu;
 356 }
 357
 358 /* very wordy version of system("ip route add dev lo mtu 1500 127.0.0.3/32") */
 359 static void set_route_mtu(int mtu, bool is_ipv4)
 360 {
 361         struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
 362         struct nlmsghdr *nh;
 363         struct rtattr *rta;
 364         struct rtmsg *rt;
 365         char data[NLMSG_ALIGN(sizeof(*nh)) +
 366                   NLMSG_ALIGN(sizeof(*rt)) +
 367                   NLMSG_ALIGN(RTA_LENGTH(sizeof(addr6))) +
 368                   NLMSG_ALIGN(RTA_LENGTH(sizeof(int))) +
 369                   NLMSG_ALIGN(RTA_LENGTH(0) + RTA_LENGTH(sizeof(int)))];
 370         int fd, ret, alen, off = 0;
 371
 372         alen = is_ipv4 ? sizeof(addr4) : sizeof(addr6);
 373
 374         fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 375         if (fd == -1)
 376                 error(1, errno, "socket netlink");
 377
 378         memset(data, 0, sizeof(data));
 379
 380         nh = (void *)data;
 381         nh->nlmsg_type = RTM_NEWROUTE;
 382         nh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
 383         off += NLMSG_ALIGN(sizeof(*nh));
 384
 385         rt = (void *)(data + off);
 386         rt->rtm_family = is_ipv4 ? AF_INET : AF_INET6;
 387         rt->rtm_table = RT_TABLE_MAIN;
 388         rt->rtm_dst_len = alen << 3;
 389         rt->rtm_protocol = RTPROT_BOOT;
 390         rt->rtm_scope = RT_SCOPE_UNIVERSE;
 391         rt->rtm_type = RTN_UNICAST;
 392         off += NLMSG_ALIGN(sizeof(*rt));
 393
 394         rta = (void *)(data + off);
 395         rta->rta_type = RTA_DST;
 396         rta->rta_len = RTA_LENGTH(alen);
 397         if (is_ipv4)
 398                 memcpy(RTA_DATA(rta), &addr4, alen);
 399         else
 400                 memcpy(RTA_DATA(rta), &addr6, alen);
 401         off += NLMSG_ALIGN(rta->rta_len);
 402
 403         rta = (void *)(data + off);
 404         rta->rta_type = RTA_OIF;
 405         rta->rta_len = RTA_LENGTH(sizeof(int));
 406         *((int *)(RTA_DATA(rta))) = 1; //if_nametoindex("lo");
 407         off += NLMSG_ALIGN(rta->rta_len);
 408
 409         /* MTU is a subtype in a metrics type */
 410         rta = (void *)(data + off);
 411         rta->rta_type = RTA_METRICS;
 412         rta->rta_len = RTA_LENGTH(0) + RTA_LENGTH(sizeof(int));
 413         off += NLMSG_ALIGN(rta->rta_len);
 414
 415         /* now fill MTU subtype. Note that it fits within above rta_len */
 416         rta = (void *)(((char *) rta) + RTA_LENGTH(0));
 417         rta->rta_type = RTAX_MTU;
 418         rta->rta_len = RTA_LENGTH(sizeof(int));
 419         *((int *)(RTA_DATA(rta))) = mtu;
 420
 421         nh->nlmsg_len = off;
 422
 423         ret = sendto(fd, data, off, 0, (void *)&nladdr, sizeof(nladdr));
 424         if (ret != off)
 425                 error(1, errno, "send netlink: %uB != %uB\n", ret, off);
 426
 427         if (close(fd))
 428                 error(1, errno, "close netlink");
 429
 430         fprintf(stderr, "route mtu (test): %u\n", mtu);
 431 }
 432
 433 static bool __send_one(int fd, struct msghdr *msg, int flags)
 434 {
 435         int ret;
 436
 437         ret = sendmsg(fd, msg, flags);
 438         if (ret == -1 &&
 439             (errno == EMSGSIZE || errno == ENOMEM || errno == EINVAL))
 440                 return false;
 441         if (ret == -1)
 442                 error(1, errno, "sendmsg");
 443         if (ret != msg->msg_iov->iov_len)
 444                 error(1, 0, "sendto: %d != %lu", ret, msg->msg_iov->iov_len);
 445         if (msg->msg_flags)
 446                 error(1, 0, "sendmsg: return flags 0x%x\n", msg->msg_flags);
 447
 448         return true;
 449 }
 450
 451 static bool send_one(int fd, int len, int gso_len,
 452                      struct sockaddr *addr, socklen_t alen)
 453 {
 454         char control[CMSG_SPACE(sizeof(uint16_t))] = {0};
 455         struct msghdr msg = {0};
 456         struct iovec iov = {0};
 457         struct cmsghdr *cm;
 458
 459         iov.iov_base = buf;
 460         iov.iov_len = len;
 461
 462         msg.msg_iov = &iov;
 463         msg.msg_iovlen = 1;
 464
 465         msg.msg_name = addr;
 466         msg.msg_namelen = alen;
 467
 468         if (gso_len && !cfg_do_setsockopt) {
 469                 msg.msg_control = control;
 470                 msg.msg_controllen = sizeof(control);
 471
 472                 cm = CMSG_FIRSTHDR(&msg);
 473                 cm->cmsg_level = SOL_UDP;
 474                 cm->cmsg_type = UDP_SEGMENT;
 475                 cm->cmsg_len = CMSG_LEN(sizeof(uint16_t));
 476                 *((uint16_t *) CMSG_DATA(cm)) = gso_len;
 477         }
 478
 479         /* If MSG_MORE, send 1 byte followed by remainder */
 480         if (cfg_do_msgmore && len > 1) {
 481                 iov.iov_len = 1;
 482                 if (!__send_one(fd, &msg, MSG_MORE))
 483                         error(1, 0, "send 1B failed");
 484
 485                 iov.iov_base++;
 486                 iov.iov_len = len - 1;
 487         }
 488
 489         return __send_one(fd, &msg, 0);
 490 }
 491
 492 static int recv_one(int fd, int flags)
 493 {
 494         int ret;
 495
 496         ret = recv(fd, buf, sizeof(buf), flags);
 497         if (ret == -1 && errno == EAGAIN && (flags & MSG_DONTWAIT))
 498                 return 0;
 499         if (ret == -1)
 500                 error(1, errno, "recv");
 501
 502         return ret;
 503 }
 504
 505 static void run_one(struct testcase *test, int fdt, int fdr,
 506                     struct sockaddr *addr, socklen_t alen)
 507 {
 508         int i, ret, val, mss;
 509         bool sent;
 510
 511         fprintf(stderr, "ipv%d tx:%d gso:%d %s\n",
 512                         addr->sa_family == AF_INET ? 4 : 6,
 513                         test->tlen, test->gso_len,
 514                         test->tfail ? "(fail)" : "");
 515
 516         val = test->gso_len;
 517         if (cfg_do_setsockopt) {
 518                 if (setsockopt(fdt, SOL_UDP, UDP_SEGMENT, &val, sizeof(val)))
 519                         error(1, errno, "setsockopt udp segment");
 520         }
 521
 522         sent = send_one(fdt, test->tlen, test->gso_len, addr, alen);
 523         if (sent && test->tfail)
 524                 error(1, 0, "send succeeded while expecting failure");
 525         if (!sent && !test->tfail)
 526                 error(1, 0, "send failed while expecting success");
 527         if (!sent)
 528                 return;
 529
 530         if (test->gso_len)
 531                 mss = test->gso_len;
 532         else
 533                 mss = addr->sa_family == AF_INET ? CONST_MSS_V4 : CONST_MSS_V6;
 534
 535
 536         /* Recv all full MSS datagrams */
 537         for (i = 0; i < test->r_num_mss; i++) {
 538                 ret = recv_one(fdr, 0);
 539                 if (ret != mss)
 540                         error(1, 0, "recv.%d: %d != %d", i, ret, mss);
 541         }
 542
 543         /* Recv the non-full last datagram, if tlen was not a multiple of mss */
 544         if (test->r_len_last) {
 545                 ret = recv_one(fdr, 0);
 546                 if (ret != test->r_len_last)
 547                         error(1, 0, "recv.%d: %d != %d (last)",
 548                               i, ret, test->r_len_last);
 549         }
 550
 551         /* Verify received all data */
 552         ret = recv_one(fdr, MSG_DONTWAIT);
 553         if (ret)
 554                 error(1, 0, "recv: unexpected datagram");
 555 }
 556
 557 static void run_all(int fdt, int fdr, struct sockaddr *addr, socklen_t alen)
 558 {
 559         struct testcase *tests, *test;
 560
 561         tests = addr->sa_family == AF_INET ? testcases_v4 : testcases_v6;
 562
 563         for (test = tests; test->tlen; test++) {
 564                 /* if a specific test is given, then skip all others */
 565                 if (cfg_specific_test_id == -1 ||
 566                     cfg_specific_test_id == test - tests)
 567                         run_one(test, fdt, fdr, addr, alen);
 568         }
 569 }
 570
 571 static void run_test(struct sockaddr *addr, socklen_t alen)
 572 {
 573         struct timeval tv = { .tv_usec = 100 * 1000 };
 574         int fdr, fdt, val;
 575
 576         fdr = socket(addr->sa_family, SOCK_DGRAM, 0);
 577         if (fdr == -1)
 578                 error(1, errno, "socket r");
 579
 580         if (bind(fdr, addr, alen))
 581                 error(1, errno, "bind");
 582
 583         /* Have tests fail quickly instead of hang */
 584         if (setsockopt(fdr, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
 585                 error(1, errno, "setsockopt rcv timeout");
 586
 587         fdt = socket(addr->sa_family, SOCK_DGRAM, 0);
 588         if (fdt == -1)
 589                 error(1, errno, "socket t");
 590
 591         /* Do not fragment these datagrams: only succeed if GSO works */
 592         set_pmtu_discover(fdt, addr->sa_family == AF_INET);
 593
 594         if (cfg_do_connectionless) {
 595                 set_device_mtu(fdt, CONST_MTU_TEST);
 596                 run_all(fdt, fdr, addr, alen);
 597         }
 598
 599         if (cfg_do_connected) {
 600                 set_device_mtu(fdt, CONST_MTU_TEST + 100);
 601                 set_route_mtu(CONST_MTU_TEST, addr->sa_family == AF_INET);
 602
 603                 if (connect(fdt, addr, alen))
 604                         error(1, errno, "connect");
 605
 606                 val = get_path_mtu(fdt, addr->sa_family == AF_INET);
 607                 if (val != CONST_MTU_TEST)
 608                         error(1, 0, "bad path mtu %u\n", val);
 609
 610                 run_all(fdt, fdr, addr, 0 /* use connected addr */);
 611         }
 612
 613         if (close(fdt))
 614                 error(1, errno, "close t");
 615         if (close(fdr))
 616                 error(1, errno, "close r");
 617 }
 618
 619 static void run_test_v4(void)
 620 {
 621         struct sockaddr_in addr = {0};
 622
 623         addr.sin_family = AF_INET;
 624         addr.sin_port = htons(cfg_port);
 625         addr.sin_addr = addr4;
 626
 627         run_test((void *)&addr, sizeof(addr));
 628 }
 629
 630 static void run_test_v6(void)
 631 {
 632         struct sockaddr_in6 addr = {0};
 633
 634         addr.sin6_family = AF_INET6;
 635         addr.sin6_port = htons(cfg_port);
 636         addr.sin6_addr = addr6;
 637
 638         run_test((void *)&addr, sizeof(addr));
 639 }
 640
 641 static void parse_opts(int argc, char **argv)
 642 {
 643         int c;
 644
 645         while ((c = getopt(argc, argv, "46cCmst:")) != -1) {
 646                 switch (c) {
 647                 case '4':
 648                         cfg_do_ipv4 = true;
 649                         break;
 650                 case '6':
 651                         cfg_do_ipv6 = true;
 652                         break;
 653                 case 'c':
 654                         cfg_do_connected = true;
 655                         break;
 656                 case 'C':
 657                         cfg_do_connectionless = true;
 658                         break;
 659                 case 'm':
 660                         cfg_do_msgmore = true;
 661                         break;
 662                 case 's':
 663                         cfg_do_setsockopt = true;
 664                         break;
 665                 case 't':
 666                         cfg_specific_test_id = strtoul(optarg, NULL, 0);
 667                         break;
 668                 default:
 669                         error(1, 0, "%s: parse error", argv[0]);
 670                 }
 671         }
 672 }
 673
 674 int main(int argc, char **argv)
 675 {
 676         parse_opts(argc, argv);
 677
 678         if (cfg_do_ipv4)
 679                 run_test_v4();
 680         if (cfg_do_ipv6)
 681                 run_test_v6();
 682
 683         fprintf(stderr, "OK\n");
 684         return 0;
 685 }