tests/test-sflow.c

   1 /*
   2  * Copyright (c) 2011, 2012, 2013, 2014 Nicira, Inc.
   3  * Copyright (c) 2013 InMon Corp.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #include <config.h>
  19 #undef NDEBUG
  20 #include "netflow.h"
  21 #include <arpa/inet.h>
  22 #include <errno.h>
  23 #include <getopt.h>
  24 #include <signal.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <setjmp.h>
  28 #include "command-line.h"
  29 #include "daemon.h"
  30 #include "dynamic-string.h"
  31 #include "ofpbuf.h"
  32 #include "ovstest.h"
  33 #include "packets.h"
  34 #include "poll-loop.h"
  35 #include "socket-util.h"
  36 #include "unixctl.h"
  37 #include "util.h"
  38 #include "openvswitch/vlog.h"
  39
  40 OVS_NO_RETURN static void usage(void);
  41 static void parse_options(int argc, char *argv[]);
  42
  43 static unixctl_cb_func test_sflow_exit;
  44
  45 /* Datagram. */
  46 #define SFLOW_VERSION_5 5
  47 #define SFLOW_MIN_LEN 36
  48
  49 /* Sample tag numbers. */
  50 #define SFLOW_FLOW_SAMPLE 1
  51 #define SFLOW_COUNTERS_SAMPLE 2
  52 #define SFLOW_FLOW_SAMPLE_EXPANDED 3
  53 #define SFLOW_COUNTERS_SAMPLE_EXPANDED 4
  54
  55 /* Structure element tag numbers. */
  56 #define SFLOW_TAG_CTR_IFCOUNTERS 1
  57 #define SFLOW_TAG_CTR_LACPCOUNTERS 7
  58 #define SFLOW_TAG_CTR_OPENFLOWPORT 1004
  59 #define SFLOW_TAG_CTR_PORTNAME 1005
  60 #define SFLOW_TAG_PKT_HEADER 1
  61 #define SFLOW_TAG_PKT_SWITCH 1001
  62 #define SFLOW_TAG_PKT_TUNNEL4_OUT 1023
  63 #define SFLOW_TAG_PKT_TUNNEL4_IN 1024
  64 #define SFLOW_TAG_PKT_TUNNEL_VNI_OUT 1029
  65 #define SFLOW_TAG_PKT_TUNNEL_VNI_IN 1030
  66
  67 /* string sizes */
  68 #define SFL_MAX_PORTNAME_LEN 255
  69
  70 struct sflow_addr {
  71     enum {
  72         SFLOW_ADDRTYPE_undefined = 0,
  73         SFLOW_ADDRTYPE_IP4,
  74         SFLOW_ADDRTYPE_IP6
  75     } type;
  76
  77     union {
  78         ovs_be32 ip4;
  79         ovs_be32 ip6[4];
  80     } a;
  81 };
  82
  83 struct sflow_xdr {
  84     /* Exceptions. */
  85     jmp_buf env;
  86     int errline;
  87
  88     /* Cursor. */
  89     ovs_be32 *datap;
  90     uint32_t i;
  91     uint32_t quads;
  92
  93     /* Agent. */
  94     struct sflow_addr agentAddr;
  95     char agentIPStr[INET6_ADDRSTRLEN + 2];
  96     uint32_t subAgentId;
  97     uint32_t uptime_mS;
  98
  99     /* Datasource. */
 100     uint32_t dsClass;
 101     uint32_t dsIndex;
 102
 103     /* Sequence numbers. */
 104     uint32_t dgramSeqNo;
 105     uint32_t fsSeqNo;
 106     uint32_t csSeqNo;
 107
 108     /* Structure offsets. */
 109     struct {
 110         uint32_t HEADER;
 111         uint32_t SWITCH;
 112         uint32_t TUNNEL4_OUT;
 113         uint32_t TUNNEL4_IN;
 114         uint32_t TUNNEL_VNI_OUT;
 115         uint32_t TUNNEL_VNI_IN;
 116         uint32_t IFCOUNTERS;
 117         uint32_t LACPCOUNTERS;
 118         uint32_t OPENFLOWPORT;
 119         uint32_t PORTNAME;
 120     } offset;
 121
 122     /* Flow sample fields. */
 123     uint32_t meanSkipCount;
 124     uint32_t samplePool;
 125     uint32_t dropEvents;
 126     uint32_t inputPortFormat;
 127     uint32_t inputPort;
 128     uint32_t outputPortFormat;
 129     uint32_t outputPort;
 130 };
 131
 132 #define SFLOWXDR_try(x) ((x->errline = setjmp(x->env)) == 0)
 133 #define SFLOWXDR_throw(x) longjmp(x->env, __LINE__)
 134 #define SFLOWXDR_assert(x, t) if (!(t)) SFLOWXDR_throw(x)
 135
 136 static void
 137 sflowxdr_init(struct sflow_xdr *x, void *buf, size_t len)
 138 {
 139     x->datap = buf;
 140     x->quads = len >> 2;
 141 }
 142
 143 static uint32_t
 144 sflowxdr_next(struct sflow_xdr *x)
 145 {
 146     return ntohl(x->datap[x->i++]);
 147 }
 148
 149 static ovs_be32
 150 sflowxdr_next_n(struct sflow_xdr *x)
 151 {
 152     return x->datap[x->i++];
 153 }
 154
 155 static bool
 156 sflowxdr_more(const struct sflow_xdr *x, uint32_t q)
 157 {
 158     return q + x->i <= x->quads;
 159 }
 160
 161 static void
 162 sflowxdr_skip(struct sflow_xdr *x, uint32_t q)
 163 {
 164     x->i += q;
 165 }
 166
 167 static uint32_t
 168 sflowxdr_mark(const struct sflow_xdr *x, uint32_t q)
 169 {
 170     return x->i + q;
 171 }
 172
 173 static bool
 174 sflowxdr_mark_ok(const struct sflow_xdr *x, uint32_t m)
 175 {
 176     return m == x->i;
 177 }
 178
 179 static void
 180 sflowxdr_mark_unique(struct sflow_xdr *x, uint32_t *pi)
 181 {
 182     if (*pi) {
 183         SFLOWXDR_throw(x);
 184     }
 185     *pi = x->i;
 186 }
 187
 188 static void
 189 sflowxdr_setc(struct sflow_xdr *x, uint32_t j)
 190 {
 191     x->i = j;
 192 }
 193
 194 static const char *
 195 sflowxdr_str(const struct sflow_xdr *x)
 196 {
 197     return (const char *) (x->datap + x->i);
 198 }
 199
 200 static uint64_t
 201 sflowxdr_next_int64(struct sflow_xdr *x)
 202 {
 203     uint64_t scratch;
 204     scratch = sflowxdr_next(x);
 205     scratch <<= 32;
 206     scratch += sflowxdr_next(x);
 207     return scratch;
 208 }
 209
 210 static void
 211 process_counter_sample(struct sflow_xdr *x)
 212 {
 213     if (x->offset.IFCOUNTERS) {
 214         sflowxdr_setc(x, x->offset.IFCOUNTERS);
 215         printf("IFCOUNTERS");
 216         printf(" dgramSeqNo=%"PRIu32, x->dgramSeqNo);
 217         printf(" ds=%s>%"PRIu32":%"PRIu32,
 218                x->agentIPStr, x->dsClass, x->dsIndex);
 219         printf(" csSeqNo=%"PRIu32, x->csSeqNo);
 220         printf(" ifindex=%"PRIu32, sflowxdr_next(x));
 221         printf(" type=%"PRIu32, sflowxdr_next(x));
 222         printf(" ifspeed=%"PRIu64, sflowxdr_next_int64(x));
 223         printf(" direction=%"PRIu32, sflowxdr_next(x));
 224         printf(" status=%"PRIu32, sflowxdr_next(x));
 225         printf(" in_octets=%"PRIu64, sflowxdr_next_int64(x));
 226         printf(" in_unicasts=%"PRIu32, sflowxdr_next(x));
 227         printf(" in_multicasts=%"PRIu32, sflowxdr_next(x));
 228         printf(" in_broadcasts=%"PRIu32, sflowxdr_next(x));
 229         printf(" in_discards=%"PRIu32, sflowxdr_next(x));
 230         printf(" in_errors=%"PRIu32, sflowxdr_next(x));
 231         printf(" in_unknownprotos=%"PRIu32, sflowxdr_next(x));
 232         printf(" out_octets=%"PRIu64, sflowxdr_next_int64(x));
 233         printf(" out_unicasts=%"PRIu32, sflowxdr_next(x));
 234         printf(" out_multicasts=%"PRIu32, sflowxdr_next(x));
 235         printf(" out_broadcasts=%"PRIu32, sflowxdr_next(x));
 236         printf(" out_discards=%"PRIu32, sflowxdr_next(x));
 237         printf(" out_errors=%"PRIu32, sflowxdr_next(x));
 238         printf(" promiscuous=%"PRIu32, sflowxdr_next(x));
 239         printf("\n");
 240     }
 241     if (x->offset.LACPCOUNTERS) {
 242         uint8_t *mac;
 243         union {
 244             ovs_be32 all;
 245             struct {
 246                 uint8_t actorAdmin;
 247                 uint8_t actorOper;
 248                 uint8_t partnerAdmin;
 249                 uint8_t partnerOper;
 250             } v;
 251         } state;
 252
 253         sflowxdr_setc(x, x->offset.LACPCOUNTERS);
 254         printf("LACPCOUNTERS");
 255         mac = (uint8_t *)sflowxdr_str(x);
 256         printf(" sysID="ETH_ADDR_FMT, ETH_ADDR_ARGS(mac));
 257         sflowxdr_skip(x, 2);
 258         mac = (uint8_t *)sflowxdr_str(x);
 259         printf(" partnerID="ETH_ADDR_FMT, ETH_ADDR_ARGS(mac));
 260         sflowxdr_skip(x, 2);
 261         printf(" aggID=%"PRIu32, sflowxdr_next(x));
 262         state.all = sflowxdr_next_n(x);
 263         printf(" actorAdmin=0x%"PRIx32, state.v.actorAdmin);
 264         printf(" actorOper=0x%"PRIx32, state.v.actorOper);
 265         printf(" partnerAdmin=0x%"PRIx32, state.v.partnerAdmin);
 266         printf(" partnerOper=0x%"PRIx32, state.v.partnerOper);
 267         printf(" LACPUDsRx=%"PRIu32, sflowxdr_next(x));
 268         printf(" markerPDUsRx=%"PRIu32, sflowxdr_next(x));
 269         printf(" markerRespPDUsRx=%"PRIu32, sflowxdr_next(x));
 270         printf(" unknownRx=%"PRIu32, sflowxdr_next(x));
 271         printf(" illegalRx=%"PRIu32, sflowxdr_next(x));
 272         printf(" LACPUDsTx=%"PRIu32, sflowxdr_next(x));
 273         printf(" markerPDUsTx=%"PRIu32, sflowxdr_next(x));
 274         printf(" markerRespPDUsTx=%"PRIu32, sflowxdr_next(x));
 275         printf("\n");
 276     }
 277     if (x->offset.OPENFLOWPORT) {
 278         sflowxdr_setc(x, x->offset.OPENFLOWPORT);
 279         printf("OPENFLOWPORT");
 280         printf(" datapath_id=%"PRIu64, sflowxdr_next_int64(x));
 281         printf(" port_no=%"PRIu32, sflowxdr_next(x));
 282         printf("\n");
 283     }
 284     if (x->offset.PORTNAME) {
 285         uint32_t pnLen;
 286         const char *pnBytes;
 287         char portName[SFL_MAX_PORTNAME_LEN + 1];
 288         sflowxdr_setc(x, x->offset.PORTNAME);
 289         printf("PORTNAME");
 290         pnLen = sflowxdr_next(x);
 291         SFLOWXDR_assert(x, (pnLen <= SFL_MAX_PORTNAME_LEN));
 292         pnBytes = sflowxdr_str(x);
 293         memcpy(portName, pnBytes, pnLen);
 294         portName[pnLen] = '\0';
 295         printf(" portName=%s", portName);
 296         printf("\n");
 297     }
 298 }
 299
 300 static char
 301 bin_to_hex(int hexit)
 302 {
 303     return "0123456789ABCDEF"[hexit];
 304 }
 305
 306 static int
 307 print_hex(const char *a, int len, char *buf, int bufLen)
 308 {
 309     unsigned char nextByte;
 310     int b = 0;
 311     int i;
 312
 313     for (i = 0; i < len; i++) {
 314         if (b > bufLen - 10) {
 315             break;
 316         }
 317         nextByte = a[i];
 318         buf[b++] = bin_to_hex(nextByte >> 4);
 319         buf[b++] = bin_to_hex(nextByte & 0x0f);
 320         if (i < len - 1) {
 321             buf[b++] = '-';
 322         }
 323     }
 324     buf[b] = '\0';
 325     return b;
 326 }
 327
 328 static void
 329 print_struct_ipv4(struct sflow_xdr *x, const char *prefix)
 330 {
 331     ovs_be32 src, dst;
 332
 333     printf(" %s_length=%"PRIu32,    prefix, sflowxdr_next(x));
 334     printf(" %s_protocol=%"PRIu32,  prefix, sflowxdr_next(x));
 335
 336     src = sflowxdr_next_n(x);
 337     dst = sflowxdr_next_n(x);
 338     printf(" %s_src="IP_FMT,        prefix, IP_ARGS(src));
 339     printf(" %s_dst="IP_FMT,        prefix, IP_ARGS(dst));
 340
 341     printf(" %s_src_port=%"PRIu32,  prefix, sflowxdr_next(x));
 342     printf(" %s_dst_port=%"PRIu32,  prefix, sflowxdr_next(x));
 343     printf(" %s_tcp_flags=%"PRIu32, prefix, sflowxdr_next(x));
 344     printf(" %s_tos=%"PRIu32,       prefix, sflowxdr_next(x));
 345 }
 346
 347 #define SFLOW_HEX_SCRATCH 1024
 348
 349 static void
 350 process_flow_sample(struct sflow_xdr *x)
 351 {
 352     if (x->offset.HEADER) {
 353         uint32_t headerLen;
 354         char scratch[SFLOW_HEX_SCRATCH];
 355
 356         printf("HEADER");
 357         printf(" dgramSeqNo=%"PRIu32, x->dgramSeqNo);
 358         printf(" ds=%s>%"PRIu32":%"PRIu32,
 359                x->agentIPStr, x->dsClass, x->dsIndex);
 360         printf(" fsSeqNo=%"PRIu32, x->fsSeqNo);
 361
 362         if (x->offset.TUNNEL4_IN) {
 363             sflowxdr_setc(x, x->offset.TUNNEL4_IN);
 364             print_struct_ipv4(x, "tunnel4_in");
 365         }
 366
 367         if (x->offset.TUNNEL4_OUT) {
 368             sflowxdr_setc(x, x->offset.TUNNEL4_OUT);
 369             print_struct_ipv4(x, "tunnel4_out");
 370         }
 371
 372         if (x->offset.TUNNEL_VNI_IN) {
 373             sflowxdr_setc(x, x->offset.TUNNEL_VNI_IN);
 374             printf( " tunnel_in_vni=%"PRIu32, sflowxdr_next(x));
 375         }
 376
 377         if (x->offset.TUNNEL_VNI_OUT) {
 378             sflowxdr_setc(x, x->offset.TUNNEL_VNI_OUT);
 379             printf( " tunnel_out_vni=%"PRIu32, sflowxdr_next(x));
 380         }
 381
 382         if (x->offset.SWITCH) {
 383             sflowxdr_setc(x, x->offset.SWITCH);
 384             printf(" in_vlan=%"PRIu32, sflowxdr_next(x));
 385             printf(" in_priority=%"PRIu32, sflowxdr_next(x));
 386             printf(" out_vlan=%"PRIu32, sflowxdr_next(x));
 387             printf(" out_priority=%"PRIu32, sflowxdr_next(x));
 388         }
 389
 390         sflowxdr_setc(x, x->offset.HEADER);
 391         printf(" meanSkip=%"PRIu32, x->meanSkipCount);
 392         printf(" samplePool=%"PRIu32, x->samplePool);
 393         printf(" dropEvents=%"PRIu32, x->dropEvents);
 394         printf(" in_ifindex=%"PRIu32, x->inputPort);
 395         printf(" in_format=%"PRIu32, x->inputPortFormat);
 396         printf(" out_ifindex=%"PRIu32, x->outputPort);
 397         printf(" out_format=%"PRIu32, x->outputPortFormat);
 398         printf(" hdr_prot=%"PRIu32, sflowxdr_next(x));
 399         printf(" pkt_len=%"PRIu32, sflowxdr_next(x));
 400         printf(" stripped=%"PRIu32, sflowxdr_next(x));
 401         headerLen = sflowxdr_next(x);
 402         printf(" hdr_len=%"PRIu32, headerLen);
 403         print_hex(sflowxdr_str(x), headerLen, scratch, SFLOW_HEX_SCRATCH);
 404         printf(" hdr=%s", scratch);
 405         printf("\n");
 406     }
 407 }
 408
 409 static void
 410 process_datagram(struct sflow_xdr *x)
 411 {
 412     uint32_t samples, s;
 413
 414     SFLOWXDR_assert(x, (sflowxdr_next(x) == SFLOW_VERSION_5));
 415
 416     /* Read the sFlow header. */
 417     x->agentAddr.type = sflowxdr_next(x);
 418     switch (x->agentAddr.type) {
 419     case SFLOW_ADDRTYPE_IP4:
 420         x->agentAddr.a.ip4 = sflowxdr_next_n(x);
 421         break;
 422
 423     case SFLOW_ADDRTYPE_IP6:
 424         x->agentAddr.a.ip6[0] = sflowxdr_next_n(x);
 425         x->agentAddr.a.ip6[1] = sflowxdr_next_n(x);
 426         x->agentAddr.a.ip6[2] = sflowxdr_next_n(x);
 427         x->agentAddr.a.ip6[3] = sflowxdr_next_n(x);
 428         break;
 429
 430     case SFLOW_ADDRTYPE_undefined:
 431     default:
 432         SFLOWXDR_throw(x);
 433         break;
 434     }
 435     x->subAgentId = sflowxdr_next(x);
 436     x->dgramSeqNo = sflowxdr_next(x);
 437     x->uptime_mS = sflowxdr_next(x);
 438
 439     /* Store the agent address as a string. */
 440     if (x->agentAddr.type == SFLOW_ADDRTYPE_IP6) {
 441         char ipstr[INET6_ADDRSTRLEN];
 442         inet_ntop(AF_INET6, (const void *) &x->agentAddr.a.ip6,
 443                   ipstr, INET6_ADDRSTRLEN);
 444         snprintf(x->agentIPStr, sizeof x->agentIPStr, "[%s]", ipstr);
 445     } else {
 446         snprintf(x->agentIPStr, sizeof x->agentIPStr,
 447                  IP_FMT, IP_ARGS(x->agentAddr.a.ip4));
 448     }
 449
 450     /* Array of flow/counter samples. */
 451     samples = sflowxdr_next(x);
 452     for (s = 0; s < samples; s++) {
 453         uint32_t sType = sflowxdr_next(x);
 454         uint32_t sQuads = sflowxdr_next(x) >> 2;
 455         uint32_t sMark = sflowxdr_mark(x, sQuads);
 456         SFLOWXDR_assert(x, sflowxdr_more(x, sQuads));
 457
 458         switch (sType) {
 459         case SFLOW_COUNTERS_SAMPLE_EXPANDED:
 460         case SFLOW_COUNTERS_SAMPLE:
 461         {
 462             uint32_t csElements, e;
 463             uint32_t ceTag, ceQuads, ceMark, csEnd;
 464
 465             x->csSeqNo = sflowxdr_next(x);
 466             if (sType == SFLOW_COUNTERS_SAMPLE_EXPANDED) {
 467                 x->dsClass = sflowxdr_next(x);
 468                 x->dsIndex = sflowxdr_next(x);
 469             } else {
 470                 uint32_t dsCombined = sflowxdr_next(x);
 471                 x->dsClass = dsCombined >> 24;
 472                 x->dsIndex = dsCombined & 0x00FFFFFF;
 473             }
 474
 475             csElements = sflowxdr_next(x);
 476             for (e = 0; e < csElements; e++) {
 477                 SFLOWXDR_assert(x, sflowxdr_more(x,2));
 478                 ceTag = sflowxdr_next(x);
 479                 ceQuads = sflowxdr_next(x) >> 2;
 480                 ceMark = sflowxdr_mark(x, ceQuads);
 481                 SFLOWXDR_assert(x, sflowxdr_more(x,ceQuads));
 482                 /* Only care about selected structures.  Just record their
 483                  * offsets here. We'll read the fields out later. */
 484                 switch (ceTag) {
 485                 case SFLOW_TAG_CTR_IFCOUNTERS:
 486                     sflowxdr_mark_unique(x, &x->offset.IFCOUNTERS);
 487                     break;
 488                 case SFLOW_TAG_CTR_LACPCOUNTERS:
 489                     sflowxdr_mark_unique(x, &x->offset.LACPCOUNTERS);
 490                     break;
 491                 case SFLOW_TAG_CTR_PORTNAME:
 492                     sflowxdr_mark_unique(x, &x->offset.PORTNAME);
 493                     break;
 494                 case SFLOW_TAG_CTR_OPENFLOWPORT:
 495                     sflowxdr_mark_unique(x, &x->offset.OPENFLOWPORT);
 496                     break;
 497
 498                     /* Add others here... */
 499                 }
 500
 501                 sflowxdr_skip(x, ceQuads);
 502                 SFLOWXDR_assert(x, sflowxdr_mark_ok(x, ceMark));
 503             }
 504
 505             csEnd = sflowxdr_mark(x, 0);
 506             process_counter_sample(x);
 507             /* Make sure we pick up the decoding where we left off. */
 508             sflowxdr_setc(x, csEnd);
 509
 510             /* Clear the offsets for the next sample. */
 511             memset(&x->offset, 0, sizeof x->offset);
 512         }
 513         break;
 514
 515         case SFLOW_FLOW_SAMPLE:
 516         case SFLOW_FLOW_SAMPLE_EXPANDED:
 517         {
 518             uint32_t fsElements, e;
 519             uint32_t feTag, feQuads, feMark, fsEnd;
 520             x->fsSeqNo = sflowxdr_next(x);
 521             if (sType == SFLOW_FLOW_SAMPLE_EXPANDED) {
 522                 x->dsClass = sflowxdr_next(x);
 523                 x->dsIndex = sflowxdr_next(x);
 524             } else {
 525                 uint32_t dsCombined = sflowxdr_next(x);
 526                 x->dsClass = dsCombined >> 24;
 527                 x->dsIndex = dsCombined & 0x00FFFFFF;
 528             }
 529             x->meanSkipCount = sflowxdr_next(x);
 530             x->samplePool = sflowxdr_next(x);
 531             x->dropEvents = sflowxdr_next(x);
 532             if (sType == SFLOW_FLOW_SAMPLE_EXPANDED) {
 533                 x->inputPortFormat = sflowxdr_next(x);
 534                 x->inputPort = sflowxdr_next(x);
 535                 x->outputPortFormat = sflowxdr_next(x);
 536                 x->outputPort = sflowxdr_next(x);
 537             } else {
 538                 uint32_t inp, outp;
 539
 540                 inp = sflowxdr_next(x);
 541                 outp = sflowxdr_next(x);
 542                 x->inputPortFormat = inp >> 30;
 543                 x->inputPort = inp & 0x3fffffff;
 544                 x->outputPortFormat = outp >> 30;
 545                 x->outputPort = outp & 0x3fffffff;
 546             }
 547             fsElements = sflowxdr_next(x);
 548             for (e = 0; e < fsElements; e++) {
 549                 SFLOWXDR_assert(x, sflowxdr_more(x,2));
 550                 feTag = sflowxdr_next(x);
 551                 feQuads = sflowxdr_next(x) >> 2;
 552                 feMark = sflowxdr_mark(x, feQuads);
 553                 SFLOWXDR_assert(x, sflowxdr_more(x,feQuads));
 554                 /* Only care about selected structures.  Just record their
 555                  * offsets here. We'll read the fields out below. */
 556                 switch (feTag) {
 557                 case SFLOW_TAG_PKT_HEADER:
 558                     sflowxdr_mark_unique(x, &x->offset.HEADER);
 559                     break;
 560
 561                 case SFLOW_TAG_PKT_SWITCH:
 562                     sflowxdr_mark_unique(x, &x->offset.SWITCH);
 563                     break;
 564
 565                 case SFLOW_TAG_PKT_TUNNEL4_OUT:
 566                     sflowxdr_mark_unique(x, &x->offset.TUNNEL4_OUT);
 567                     break;
 568
 569                 case SFLOW_TAG_PKT_TUNNEL4_IN:
 570                     sflowxdr_mark_unique(x, &x->offset.TUNNEL4_IN);
 571                     break;
 572
 573                 case SFLOW_TAG_PKT_TUNNEL_VNI_OUT:
 574                     sflowxdr_mark_unique(x, &x->offset.TUNNEL_VNI_OUT);
 575                     break;
 576
 577                 case SFLOW_TAG_PKT_TUNNEL_VNI_IN:
 578                     sflowxdr_mark_unique(x, &x->offset.TUNNEL_VNI_IN);
 579                     break;
 580
 581                     /* Add others here... */
 582                 }
 583
 584                 sflowxdr_skip(x, feQuads);
 585                 SFLOWXDR_assert(x, sflowxdr_mark_ok(x, feMark));
 586             }
 587
 588             fsEnd = sflowxdr_mark(x, 0);
 589             process_flow_sample(x);
 590             /* Make sure we pick up the decoding where we left off. */
 591             sflowxdr_setc(x, fsEnd);
 592
 593             /* Clear the offsets for the next counter/flow sample. */
 594             memset(&x->offset, 0, sizeof x->offset);
 595         }
 596         break;
 597
 598         default:
 599             /* Skip other sample types. */
 600             sflowxdr_skip(x, sQuads);
 601         }
 602         SFLOWXDR_assert(x, sflowxdr_mark_ok(x, sMark));
 603     }
 604 }
 605
 606 static void
 607 print_sflow(struct ofpbuf *buf)
 608 {
 609     char *dgram_buf;
 610     int dgram_len = ofpbuf_size(buf);
 611     struct sflow_xdr xdrDatagram;
 612     struct sflow_xdr *x = &xdrDatagram;
 613
 614     memset(x, 0, sizeof *x);
 615     if (SFLOWXDR_try(x)) {
 616         SFLOWXDR_assert(x, (dgram_buf = ofpbuf_try_pull(buf, ofpbuf_size(buf))));
 617         sflowxdr_init(x, dgram_buf, dgram_len);
 618         SFLOWXDR_assert(x, dgram_len >= SFLOW_MIN_LEN);
 619         process_datagram(x);
 620     } else {
 621         // CATCH
 622         printf("\n>>>>> ERROR in " __FILE__ " at line %u\n", x->errline);
 623     }
 624 }
 625
 626 static void
 627 test_sflow_main(int argc, char *argv[])
 628 {
 629     struct unixctl_server *server;
 630     enum { MAX_RECV = 1500 };
 631     const char *target;
 632     struct ofpbuf buf;
 633     bool exiting = false;
 634     int error;
 635     int sock;
 636
 637     proctitle_init(argc, argv);
 638     set_program_name(argv[0]);
 639     service_start(&argc, &argv);
 640     parse_options(argc, argv);
 641
 642     if (argc - optind != 1) {
 643         ovs_fatal(0, "exactly one non-option argument required "
 644                   "(use --help for help)");
 645     }
 646     target = argv[optind];
 647
 648     sock = inet_open_passive(SOCK_DGRAM, target, 0, NULL, 0, true);
 649     if (sock < 0) {
 650         ovs_fatal(0, "%s: failed to open (%s)", argv[1], ovs_strerror(-sock));
 651     }
 652
 653     daemon_save_fd(STDOUT_FILENO);
 654     daemonize_start();
 655
 656     error = unixctl_server_create(NULL, &server);
 657     if (error) {
 658         ovs_fatal(error, "failed to create unixctl server");
 659     }
 660     unixctl_command_register("exit", "", 0, 0, test_sflow_exit, &exiting);
 661
 662     daemonize_complete();
 663
 664     ofpbuf_init(&buf, MAX_RECV);
 665     for (;;) {
 666         int retval;
 667
 668         unixctl_server_run(server);
 669
 670         ofpbuf_clear(&buf);
 671         do {
 672             retval = recv(sock, ofpbuf_data(&buf), buf.allocated, 0);
 673         } while (retval < 0 && errno == EINTR);
 674         if (retval > 0) {
 675             ofpbuf_put_uninit(&buf, retval);
 676             print_sflow(&buf);
 677             fflush(stdout);
 678         }
 679
 680         if (exiting) {
 681             break;
 682         }
 683
 684         poll_fd_wait(sock, POLLIN);
 685         unixctl_server_wait(server);
 686         poll_block();
 687     }
 688 }
 689
 690 static void
 691 parse_options(int argc, char *argv[])
 692 {
 693     enum {
 694         DAEMON_OPTION_ENUMS,
 695         VLOG_OPTION_ENUMS
 696     };
 697     static const struct option long_options[] = {
 698         {"verbose", optional_argument, NULL, 'v'},
 699         {"help", no_argument, NULL, 'h'},
 700         DAEMON_LONG_OPTIONS,
 701         VLOG_LONG_OPTIONS,
 702         {NULL, 0, NULL, 0},
 703     };
 704     char *short_options = long_options_to_short_options(long_options);
 705
 706     for (;;) {
 707         int c = getopt_long(argc, argv, short_options, long_options, NULL);
 708         if (c == -1) {
 709             break;
 710         }
 711
 712         switch (c) {
 713         case 'h':
 714             usage();
 715
 716         DAEMON_OPTION_HANDLERS
 717         VLOG_OPTION_HANDLERS
 718
 719         case '?':
 720             exit(EXIT_FAILURE);
 721
 722         default:
 723             abort();
 724         }
 725     }
 726     free(short_options);
 727 }
 728
 729 static void
 730 usage(void)
 731 {
 732     printf("%s: sflow collector test utility\n"
 733            "usage: %s [OPTIONS] PORT[:IP]\n"
 734            "where PORT is the UDP port to listen on and IP is optionally\n"
 735            "the IP address to listen on.\n",
 736            program_name, program_name);
 737     daemon_usage();
 738     vlog_usage();
 739     printf("\nOther options:\n"
 740            "  -h, --help                  display this help message\n");
 741     exit(EXIT_SUCCESS);
 742 }
 743
 744 static void
 745 test_sflow_exit(struct unixctl_conn *conn,
 746                 int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
 747                 void *exiting_)
 748 {
 749     bool *exiting = exiting_;
 750     *exiting = true;
 751     unixctl_command_reply(conn, NULL);
 752 }
 753
 754 OVSTEST_REGISTER("test-sflow", test_sflow_main);