lib/ofp-print.c

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include "ofp-print.h"
  19
  20 #include <errno.h>
  21 #include <inttypes.h>
  22 #include <sys/types.h>
  23 #include <netinet/in.h>
  24 #include <sys/wait.h>
  25 #include <stdarg.h>
  26 #include <stdlib.h>
  27 #include <ctype.h>
  28
  29 #include "byte-order.h"
  30 #include "compiler.h"
  31 #include "dynamic-string.h"
  32 #include "flow.h"
  33 #include "multipath.h"
  34 #include "nx-match.h"
  35 #include "ofp-util.h"
  36 #include "ofpbuf.h"
  37 #include "openflow/openflow.h"
  38 #include "openflow/nicira-ext.h"
  39 #include "packets.h"
  40 #include "pcap.h"
  41 #include "type-props.h"
  42 #include "unaligned.h"
  43 #include "util.h"
  44
  45 static void ofp_print_port_name(struct ds *string, uint16_t port);
  46 static void ofp_print_queue_name(struct ds *string, uint32_t port);
  47 static void ofp_print_error(struct ds *, int error);
  48
  49
  50 /* Returns a string that represents the contents of the Ethernet frame in the
  51  * 'len' bytes starting at 'data' to 'stream' as output by tcpdump.
  52  * 'total_len' specifies the full length of the Ethernet frame (of which 'len'
  53  * bytes were captured).
  54  *
  55  * The caller must free the returned string.
  56  *
  57  * This starts and kills a tcpdump subprocess so it's quite expensive. */
  58 char *
  59 ofp_packet_to_string(const void *data, size_t len, size_t total_len OVS_UNUSED)
  60 {
  61     struct ds ds = DS_EMPTY_INITIALIZER;
  62     struct ofpbuf buf;
  63
  64     char command[128];
  65     FILE *pcap;
  66     FILE *tcpdump;
  67     int status;
  68     int c;
  69
  70     ofpbuf_use_const(&buf, data, len);
  71
  72     pcap = tmpfile();
  73     if (!pcap) {
  74         ovs_error(errno, "tmpfile");
  75         return xstrdup("<error>");
  76     }
  77     pcap_write_header(pcap);
  78     pcap_write(pcap, &buf);
  79     fflush(pcap);
  80     if (ferror(pcap)) {
  81         ovs_error(errno, "error writing temporary file");
  82     }
  83     rewind(pcap);
  84
  85     snprintf(command, sizeof command, "/usr/sbin/tcpdump -t -e -n -r /dev/fd/%d 2>/dev/null",
  86              fileno(pcap));
  87     tcpdump = popen(command, "r");
  88     fclose(pcap);
  89     if (!tcpdump) {
  90         ovs_error(errno, "exec(\"%s\")", command);
  91         return xstrdup("<error>");
  92     }
  93
  94     while ((c = getc(tcpdump)) != EOF) {
  95         ds_put_char(&ds, c);
  96     }
  97
  98     status = pclose(tcpdump);
  99     if (WIFEXITED(status)) {
 100         if (WEXITSTATUS(status))
 101             ovs_error(0, "tcpdump exited with status %d", WEXITSTATUS(status));
 102     } else if (WIFSIGNALED(status)) {
 103         ovs_error(0, "tcpdump exited with signal %d", WTERMSIG(status));
 104     }
 105     return ds_cstr(&ds);
 106 }
 107
 108 static void
 109 ofp_print_packet_in(struct ds *string, const struct ofp_packet_in *op,
 110                     int verbosity)
 111 {
 112     size_t len = ntohs(op->header.length);
 113     size_t data_len;
 114
 115     ds_put_format(string, " total_len=%"PRIu16" in_port=",
 116                   ntohs(op->total_len));
 117     ofp_print_port_name(string, ntohs(op->in_port));
 118
 119     if (op->reason == OFPR_ACTION)
 120         ds_put_cstr(string, " (via action)");
 121     else if (op->reason != OFPR_NO_MATCH)
 122         ds_put_format(string, " (***reason %"PRIu8"***)", op->reason);
 123
 124     data_len = len - offsetof(struct ofp_packet_in, data);
 125     ds_put_format(string, " data_len=%zu", data_len);
 126     if (htonl(op->buffer_id) == UINT32_MAX) {
 127         ds_put_format(string, " (unbuffered)");
 128         if (ntohs(op->total_len) != data_len)
 129             ds_put_format(string, " (***total_len != data_len***)");
 130     } else {
 131         ds_put_format(string, " buffer=0x%08"PRIx32, ntohl(op->buffer_id));
 132         if (ntohs(op->total_len) < data_len)
 133             ds_put_format(string, " (***total_len < data_len***)");
 134     }
 135     ds_put_char(string, '\n');
 136
 137     if (verbosity > 0) {
 138         struct flow flow;
 139         struct ofpbuf packet;
 140
 141         ofpbuf_use_const(&packet, op->data, data_len);
 142         flow_extract(&packet, 0, ntohs(op->in_port), &flow);
 143         flow_format(string, &flow);
 144         ds_put_char(string, '\n');
 145     }
 146     if (verbosity > 1) {
 147         char *packet = ofp_packet_to_string(op->data, data_len,
 148                                             ntohs(op->total_len));
 149         ds_put_cstr(string, packet);
 150         free(packet);
 151     }
 152 }
 153
 154 static void ofp_print_port_name(struct ds *string, uint16_t port)
 155 {
 156     const char *name;
 157     switch (port) {
 158     case OFPP_IN_PORT:
 159         name = "IN_PORT";
 160         break;
 161     case OFPP_TABLE:
 162         name = "TABLE";
 163         break;
 164     case OFPP_NORMAL:
 165         name = "NORMAL";
 166         break;
 167     case OFPP_FLOOD:
 168         name = "FLOOD";
 169         break;
 170     case OFPP_ALL:
 171         name = "ALL";
 172         break;
 173     case OFPP_CONTROLLER:
 174         name = "CONTROLLER";
 175         break;
 176     case OFPP_LOCAL:
 177         name = "LOCAL";
 178         break;
 179     case OFPP_NONE:
 180         name = "NONE";
 181         break;
 182     default:
 183         ds_put_format(string, "%"PRIu16, port);
 184         return;
 185     }
 186     ds_put_cstr(string, name);
 187 }
 188
 189
 190 static void
 191 print_note(struct ds *string, const struct nx_action_note *nan)
 192 {
 193     size_t len;
 194     size_t i;
 195
 196     ds_put_cstr(string, "note:");
 197     len = ntohs(nan->len) - offsetof(struct nx_action_note, note);
 198     for (i = 0; i < len; i++) {
 199         if (i) {
 200             ds_put_char(string, '.');
 201         }
 202         ds_put_format(string, "%02"PRIx8, nan->note[i]);
 203     }
 204 }
 205
 206 static int
 207 nx_action_len(enum nx_action_subtype subtype)
 208 {
 209     switch (subtype) {
 210     case NXAST_SNAT__OBSOLETE: return -1;
 211     case NXAST_RESUBMIT: return sizeof(struct nx_action_resubmit);
 212     case NXAST_SET_TUNNEL: return sizeof(struct nx_action_set_tunnel);
 213     case NXAST_DROP_SPOOFED_ARP:
 214         return sizeof(struct nx_action_drop_spoofed_arp);
 215     case NXAST_SET_QUEUE: return sizeof(struct nx_action_set_queue);
 216     case NXAST_POP_QUEUE: return sizeof(struct nx_action_pop_queue);
 217     case NXAST_REG_MOVE: return sizeof(struct nx_action_reg_move);
 218     case NXAST_REG_LOAD: return sizeof(struct nx_action_reg_load);
 219     case NXAST_NOTE: return -1;
 220     case NXAST_SET_TUNNEL64: return sizeof(struct nx_action_set_tunnel64);
 221     case NXAST_MULTIPATH: return sizeof(struct nx_action_multipath);
 222     case NXAST_AUTOPATH: return sizeof (struct nx_action_autopath);
 223     default: return -1;
 224     }
 225 }
 226
 227 static void
 228 ofp_print_nx_action(struct ds *string, const struct nx_action_header *nah)
 229 {
 230     uint16_t subtype = ntohs(nah->subtype);
 231     int required_len = nx_action_len(subtype);
 232     int len = ntohs(nah->len);
 233
 234     if (required_len != -1 && required_len != len) {
 235         ds_put_format(string, "***Nicira action %"PRIu16" wrong length: %d***",
 236                       subtype, len);
 237         return;
 238     }
 239
 240     if (subtype <= TYPE_MAXIMUM(enum nx_action_subtype)) {
 241         const struct nx_action_set_tunnel64 *nast64;
 242         const struct nx_action_set_tunnel *nast;
 243         const struct nx_action_set_queue *nasq;
 244         const struct nx_action_resubmit *nar;
 245         const struct nx_action_reg_move *move;
 246         const struct nx_action_reg_load *load;
 247         const struct nx_action_multipath *nam;
 248         const struct nx_action_autopath *naa;
 249
 250         switch ((enum nx_action_subtype) subtype) {
 251         case NXAST_RESUBMIT:
 252             nar = (struct nx_action_resubmit *)nah;
 253             ds_put_format(string, "resubmit:");
 254             ofp_print_port_name(string, ntohs(nar->in_port));
 255             return;
 256
 257         case NXAST_SET_TUNNEL:
 258             nast = (struct nx_action_set_tunnel *)nah;
 259             ds_put_format(string, "set_tunnel:%#"PRIx32, ntohl(nast->tun_id));
 260             return;
 261
 262         case NXAST_DROP_SPOOFED_ARP:
 263             ds_put_cstr(string, "drop_spoofed_arp");
 264             return;
 265
 266         case NXAST_SET_QUEUE:
 267             nasq = (struct nx_action_set_queue *)nah;
 268             ds_put_format(string, "set_queue:%u", ntohl(nasq->queue_id));
 269             return;
 270
 271         case NXAST_POP_QUEUE:
 272             ds_put_cstr(string, "pop_queue");
 273             return;
 274
 275         case NXAST_NOTE:
 276             print_note(string, (const struct nx_action_note *) nah);
 277             return;
 278
 279         case NXAST_REG_MOVE:
 280             move = (const struct nx_action_reg_move *) nah;
 281             nxm_format_reg_move(move, string);
 282             return;
 283
 284         case NXAST_REG_LOAD:
 285             load = (const struct nx_action_reg_load *) nah;
 286             nxm_format_reg_load(load, string);
 287             return;
 288
 289         case NXAST_SET_TUNNEL64:
 290             nast64 = (const struct nx_action_set_tunnel64 *) nah;
 291             ds_put_format(string, "set_tunnel64:%#"PRIx64,
 292                           ntohll(nast64->tun_id));
 293             return;
 294
 295         case NXAST_MULTIPATH:
 296             nam = (const struct nx_action_multipath *) nah;
 297             multipath_format(nam, string);
 298             return;
 299
 300         case NXAST_AUTOPATH:
 301             naa = (const struct nx_action_autopath *)nah;
 302             ds_put_format(string, "autopath(%u,", ntohl(naa->id));
 303             nxm_format_field_bits(string, ntohl(naa->dst),
 304                                   nxm_decode_ofs(naa->ofs_nbits),
 305                                   nxm_decode_n_bits(naa->ofs_nbits));
 306             ds_put_char(string, ')');
 307             return;
 308
 309         case NXAST_SNAT__OBSOLETE:
 310         default:
 311             break;
 312         }
 313     }
 314
 315     ds_put_format(string, "***unknown Nicira action:%"PRIu16"***", subtype);
 316 }
 317
 318 static int
 319 ofp_action_len(enum ofp_action_type type)
 320 {
 321     switch (type) {
 322     case OFPAT_OUTPUT: return sizeof(struct ofp_action_output);
 323     case OFPAT_SET_VLAN_VID: return sizeof(struct ofp_action_vlan_vid);
 324     case OFPAT_SET_VLAN_PCP: return sizeof(struct ofp_action_vlan_pcp);
 325     case OFPAT_STRIP_VLAN: return sizeof(struct ofp_action_header);
 326     case OFPAT_SET_DL_SRC: return sizeof(struct ofp_action_dl_addr);
 327     case OFPAT_SET_DL_DST: return sizeof(struct ofp_action_dl_addr);
 328     case OFPAT_SET_NW_SRC: return sizeof(struct ofp_action_nw_addr);
 329     case OFPAT_SET_NW_DST: return sizeof(struct ofp_action_nw_addr);
 330     case OFPAT_SET_NW_TOS: return sizeof(struct ofp_action_nw_tos);
 331     case OFPAT_SET_TP_SRC: return sizeof(struct ofp_action_tp_port);
 332     case OFPAT_SET_TP_DST: return sizeof(struct ofp_action_tp_port);
 333     case OFPAT_ENQUEUE: return sizeof(struct ofp_action_enqueue);
 334     case OFPAT_VENDOR: return -1;
 335     default: return -1;
 336     }
 337 }
 338
 339 static int
 340 ofp_print_action(struct ds *string, const struct ofp_action_header *ah,
 341         size_t actions_len)
 342 {
 343     enum ofp_action_type type;
 344     int required_len;
 345     size_t len;
 346
 347     if (actions_len < sizeof *ah) {
 348         ds_put_format(string, "***action array too short for next action***\n");
 349         return -1;
 350     }
 351
 352     type = ntohs(ah->type);
 353     len = ntohs(ah->len);
 354     if (actions_len < len) {
 355         ds_put_format(string, "***truncated action %d***\n", (int) type);
 356         return -1;
 357     }
 358
 359     if (!len) {
 360         ds_put_format(string, "***zero-length action***\n");
 361         return 8;
 362     }
 363
 364     if ((len % OFP_ACTION_ALIGN) != 0) {
 365         ds_put_format(string,
 366                       "***action %d length not a multiple of %d***\n",
 367                       (int) type, OFP_ACTION_ALIGN);
 368         return -1;
 369     }
 370
 371     required_len = ofp_action_len(type);
 372     if (required_len >= 0 && len != required_len) {
 373         ds_put_format(string,
 374                       "***action %d wrong length: %zu***\n", (int) type, len);
 375         return -1;
 376     }
 377
 378     switch (type) {
 379     case OFPAT_OUTPUT: {
 380         struct ofp_action_output *oa = (struct ofp_action_output *)ah;
 381         uint16_t port = ntohs(oa->port);
 382         if (port < OFPP_MAX) {
 383             ds_put_format(string, "output:%"PRIu16, port);
 384         } else {
 385             ofp_print_port_name(string, port);
 386             if (port == OFPP_CONTROLLER) {
 387                 if (oa->max_len) {
 388                     ds_put_format(string, ":%"PRIu16, ntohs(oa->max_len));
 389                 } else {
 390                     ds_put_cstr(string, ":all");
 391                 }
 392             }
 393         }
 394         break;
 395     }
 396
 397     case OFPAT_ENQUEUE: {
 398         struct ofp_action_enqueue *ea = (struct ofp_action_enqueue *)ah;
 399         unsigned int port = ntohs(ea->port);
 400         unsigned int queue_id = ntohl(ea->queue_id);
 401         ds_put_format(string, "enqueue:");
 402         if (port != OFPP_IN_PORT) {
 403             ds_put_format(string, "%u", port);
 404         } else {
 405             ds_put_cstr(string, "IN_PORT");
 406         }
 407         ds_put_format(string, "q%u", queue_id);
 408         break;
 409     }
 410
 411     case OFPAT_SET_VLAN_VID: {
 412         struct ofp_action_vlan_vid *va = (struct ofp_action_vlan_vid *)ah;
 413         ds_put_format(string, "mod_vlan_vid:%"PRIu16, ntohs(va->vlan_vid));
 414         break;
 415     }
 416
 417     case OFPAT_SET_VLAN_PCP: {
 418         struct ofp_action_vlan_pcp *va = (struct ofp_action_vlan_pcp *)ah;
 419         ds_put_format(string, "mod_vlan_pcp:%"PRIu8, va->vlan_pcp);
 420         break;
 421     }
 422
 423     case OFPAT_STRIP_VLAN:
 424         ds_put_cstr(string, "strip_vlan");
 425         break;
 426
 427     case OFPAT_SET_DL_SRC: {
 428         struct ofp_action_dl_addr *da = (struct ofp_action_dl_addr *)ah;
 429         ds_put_format(string, "mod_dl_src:"ETH_ADDR_FMT,
 430                 ETH_ADDR_ARGS(da->dl_addr));
 431         break;
 432     }
 433
 434     case OFPAT_SET_DL_DST: {
 435         struct ofp_action_dl_addr *da = (struct ofp_action_dl_addr *)ah;
 436         ds_put_format(string, "mod_dl_dst:"ETH_ADDR_FMT,
 437                 ETH_ADDR_ARGS(da->dl_addr));
 438         break;
 439     }
 440
 441     case OFPAT_SET_NW_SRC: {
 442         struct ofp_action_nw_addr *na = (struct ofp_action_nw_addr *)ah;
 443         ds_put_format(string, "mod_nw_src:"IP_FMT, IP_ARGS(&na->nw_addr));
 444         break;
 445     }
 446
 447     case OFPAT_SET_NW_DST: {
 448         struct ofp_action_nw_addr *na = (struct ofp_action_nw_addr *)ah;
 449         ds_put_format(string, "mod_nw_dst:"IP_FMT, IP_ARGS(&na->nw_addr));
 450         break;
 451     }
 452
 453     case OFPAT_SET_NW_TOS: {
 454         struct ofp_action_nw_tos *nt = (struct ofp_action_nw_tos *)ah;
 455         ds_put_format(string, "mod_nw_tos:%d", nt->nw_tos);
 456         break;
 457     }
 458
 459     case OFPAT_SET_TP_SRC: {
 460         struct ofp_action_tp_port *ta = (struct ofp_action_tp_port *)ah;
 461         ds_put_format(string, "mod_tp_src:%d", ntohs(ta->tp_port));
 462         break;
 463     }
 464
 465     case OFPAT_SET_TP_DST: {
 466         struct ofp_action_tp_port *ta = (struct ofp_action_tp_port *)ah;
 467         ds_put_format(string, "mod_tp_dst:%d", ntohs(ta->tp_port));
 468         break;
 469     }
 470
 471     case OFPAT_VENDOR: {
 472         struct ofp_action_vendor_header *avh
 473                 = (struct ofp_action_vendor_header *)ah;
 474         if (len < sizeof *avh) {
 475             ds_put_format(string, "***ofpat_vendor truncated***\n");
 476             return -1;
 477         }
 478         if (avh->vendor == htonl(NX_VENDOR_ID)) {
 479             ofp_print_nx_action(string, (struct nx_action_header *)avh);
 480         } else {
 481             ds_put_format(string, "vendor action:0x%x", ntohl(avh->vendor));
 482         }
 483         break;
 484     }
 485
 486     default:
 487         ds_put_format(string, "(decoder %d not implemented)", (int) type);
 488         break;
 489     }
 490
 491     return len;
 492 }
 493
 494 void
 495 ofp_print_actions(struct ds *string, const struct ofp_action_header *action,
 496                   size_t actions_len)
 497 {
 498     uint8_t *p = (uint8_t *)action;
 499     int len = 0;
 500
 501     ds_put_cstr(string, "actions=");
 502     if (!actions_len) {
 503         ds_put_cstr(string, "drop");
 504     }
 505     while (actions_len > 0) {
 506         if (len) {
 507             ds_put_cstr(string, ",");
 508         }
 509         len = ofp_print_action(string, (struct ofp_action_header *)p,
 510                 actions_len);
 511         if (len < 0) {
 512             return;
 513         }
 514         p += len;
 515         actions_len -= len;
 516     }
 517 }
 518
 519 static void
 520 ofp_print_packet_out(struct ds *string, const struct ofp_packet_out *opo,
 521                      int verbosity)
 522 {
 523     size_t len = ntohs(opo->header.length);
 524     size_t actions_len = ntohs(opo->actions_len);
 525
 526     ds_put_cstr(string, " in_port=");
 527     ofp_print_port_name(string, ntohs(opo->in_port));
 528
 529     ds_put_format(string, " actions_len=%zu ", actions_len);
 530     if (actions_len > (ntohs(opo->header.length) - sizeof *opo)) {
 531         ds_put_format(string, "***packet too short for action length***\n");
 532         return;
 533     }
 534     ofp_print_actions(string, opo->actions, actions_len);
 535
 536     if (ntohl(opo->buffer_id) == UINT32_MAX) {
 537         int data_len = len - sizeof *opo - actions_len;
 538         ds_put_format(string, " data_len=%d", data_len);
 539         if (verbosity > 0 && len > sizeof *opo) {
 540             char *packet = ofp_packet_to_string(
 541                     (uint8_t *)opo->actions + actions_len, data_len, data_len);
 542             ds_put_char(string, '\n');
 543             ds_put_cstr(string, packet);
 544             free(packet);
 545         }
 546     } else {
 547         ds_put_format(string, " buffer=0x%08"PRIx32, ntohl(opo->buffer_id));
 548     }
 549     ds_put_char(string, '\n');
 550 }
 551
 552 /* qsort comparison function. */
 553 static int
 554 compare_ports(const void *a_, const void *b_)
 555 {
 556     const struct ofp_phy_port *a = a_;
 557     const struct ofp_phy_port *b = b_;
 558     uint16_t ap = ntohs(a->port_no);
 559     uint16_t bp = ntohs(b->port_no);
 560
 561     return ap < bp ? -1 : ap > bp;
 562 }
 563
 564 static void ofp_print_port_features(struct ds *string, uint32_t features)
 565 {
 566     if (features == 0) {
 567         ds_put_cstr(string, "Unsupported\n");
 568         return;
 569     }
 570     if (features & OFPPF_10MB_HD) {
 571         ds_put_cstr(string, "10MB-HD ");
 572     }
 573     if (features & OFPPF_10MB_FD) {
 574         ds_put_cstr(string, "10MB-FD ");
 575     }
 576     if (features & OFPPF_100MB_HD) {
 577         ds_put_cstr(string, "100MB-HD ");
 578     }
 579     if (features & OFPPF_100MB_FD) {
 580         ds_put_cstr(string, "100MB-FD ");
 581     }
 582     if (features & OFPPF_1GB_HD) {
 583         ds_put_cstr(string, "1GB-HD ");
 584     }
 585     if (features & OFPPF_1GB_FD) {
 586         ds_put_cstr(string, "1GB-FD ");
 587     }
 588     if (features & OFPPF_10GB_FD) {
 589         ds_put_cstr(string, "10GB-FD ");
 590     }
 591     if (features & OFPPF_COPPER) {
 592         ds_put_cstr(string, "COPPER ");
 593     }
 594     if (features & OFPPF_FIBER) {
 595         ds_put_cstr(string, "FIBER ");
 596     }
 597     if (features & OFPPF_AUTONEG) {
 598         ds_put_cstr(string, "AUTO_NEG ");
 599     }
 600     if (features & OFPPF_PAUSE) {
 601         ds_put_cstr(string, "AUTO_PAUSE ");
 602     }
 603     if (features & OFPPF_PAUSE_ASYM) {
 604         ds_put_cstr(string, "AUTO_PAUSE_ASYM ");
 605     }
 606     ds_put_char(string, '\n');
 607 }
 608
 609 static void
 610 ofp_print_phy_port(struct ds *string, const struct ofp_phy_port *port)
 611 {
 612     char name[OFP_MAX_PORT_NAME_LEN];
 613     int j;
 614
 615     memcpy(name, port->name, sizeof name);
 616     for (j = 0; j < sizeof name - 1; j++) {
 617         if (!isprint((unsigned char) name[j])) {
 618             break;
 619         }
 620     }
 621     name[j] = '\0';
 622
 623     ds_put_char(string, ' ');
 624     ofp_print_port_name(string, ntohs(port->port_no));
 625     ds_put_format(string, "(%s): addr:"ETH_ADDR_FMT", config: %#x, state:%#x\n",
 626             name, ETH_ADDR_ARGS(port->hw_addr), ntohl(port->config),
 627             ntohl(port->state));
 628     if (port->curr) {
 629         ds_put_format(string, "     current:    ");
 630         ofp_print_port_features(string, ntohl(port->curr));
 631     }
 632     if (port->advertised) {
 633         ds_put_format(string, "     advertised: ");
 634         ofp_print_port_features(string, ntohl(port->advertised));
 635     }
 636     if (port->supported) {
 637         ds_put_format(string, "     supported:  ");
 638         ofp_print_port_features(string, ntohl(port->supported));
 639     }
 640     if (port->peer) {
 641         ds_put_format(string, "     peer:       ");
 642         ofp_print_port_features(string, ntohl(port->peer));
 643     }
 644 }
 645
 646 static void
 647 ofp_print_switch_features(struct ds *string,
 648                           const struct ofp_switch_features *osf)
 649 {
 650     size_t len = ntohs(osf->header.length);
 651     struct ofp_phy_port *port_list;
 652     int n_ports;
 653     int i;
 654
 655     ds_put_format(string, " ver:0x%x, dpid:%016"PRIx64"\n",
 656             osf->header.version, ntohll(osf->datapath_id));
 657     ds_put_format(string, "n_tables:%d, n_buffers:%d\n", osf->n_tables,
 658             ntohl(osf->n_buffers));
 659     ds_put_format(string, "features: capabilities:%#x, actions:%#x\n",
 660            ntohl(osf->capabilities), ntohl(osf->actions));
 661
 662     n_ports = (len - sizeof *osf) / sizeof *osf->ports;
 663
 664     port_list = xmemdup(osf->ports, len - sizeof *osf);
 665     qsort(port_list, n_ports, sizeof *port_list, compare_ports);
 666     for (i = 0; i < n_ports; i++) {
 667         ofp_print_phy_port(string, &port_list[i]);
 668     }
 669     free(port_list);
 670 }
 671
 672 static void
 673 ofp_print_switch_config(struct ds *string, const struct ofp_switch_config *osc)
 674 {
 675     uint16_t flags;
 676
 677     flags = ntohs(osc->flags);
 678
 679     ds_put_cstr(string, " frags=");
 680     switch (flags & OFPC_FRAG_MASK) {
 681     case OFPC_FRAG_NORMAL:
 682         ds_put_cstr(string, "normal");
 683         flags &= ~OFPC_FRAG_MASK;
 684         break;
 685     case OFPC_FRAG_DROP:
 686         ds_put_cstr(string, "drop");
 687         flags &= ~OFPC_FRAG_MASK;
 688         break;
 689     case OFPC_FRAG_REASM:
 690         ds_put_cstr(string, "reassemble");
 691         flags &= ~OFPC_FRAG_MASK;
 692         break;
 693     }
 694     if (flags) {
 695         ds_put_format(string, " ***unknown flags 0x%04"PRIx16"***", flags);
 696     }
 697
 698     ds_put_format(string, " miss_send_len=%"PRIu16"\n", ntohs(osc->miss_send_len));
 699 }
 700
 701 static void print_wild(struct ds *string, const char *leader, int is_wild,
 702             int verbosity, const char *format, ...)
 703             __attribute__((format(printf, 5, 6)));
 704
 705 static void print_wild(struct ds *string, const char *leader, int is_wild,
 706                        int verbosity, const char *format, ...)
 707 {
 708     if (is_wild && verbosity < 2) {
 709         return;
 710     }
 711     ds_put_cstr(string, leader);
 712     if (!is_wild) {
 713         va_list args;
 714
 715         va_start(args, format);
 716         ds_put_format_valist(string, format, args);
 717         va_end(args);
 718     } else {
 719         ds_put_char(string, '*');
 720     }
 721     ds_put_char(string, ',');
 722 }
 723
 724 static void
 725 print_ip_netmask(struct ds *string, const char *leader, uint32_t ip,
 726                  uint32_t wild_bits, int verbosity)
 727 {
 728     if (wild_bits >= 32 && verbosity < 2) {
 729         return;
 730     }
 731     ds_put_cstr(string, leader);
 732     if (wild_bits < 32) {
 733         ds_put_format(string, IP_FMT, IP_ARGS(&ip));
 734         if (wild_bits) {
 735             ds_put_format(string, "/%d", 32 - wild_bits);
 736         }
 737     } else {
 738         ds_put_char(string, '*');
 739     }
 740     ds_put_char(string, ',');
 741 }
 742
 743 void
 744 ofp_print_match(struct ds *f, const struct ofp_match *om, int verbosity)
 745 {
 746     char *s = ofp_match_to_string(om, verbosity);
 747     ds_put_cstr(f, s);
 748     free(s);
 749 }
 750
 751 char *
 752 ofp_match_to_string(const struct ofp_match *om, int verbosity)
 753 {
 754     struct ds f = DS_EMPTY_INITIALIZER;
 755     uint32_t w = ntohl(om->wildcards);
 756     bool skip_type = false;
 757     bool skip_proto = false;
 758
 759     if (!(w & OFPFW_DL_TYPE)) {
 760         skip_type = true;
 761         if (om->dl_type == htons(ETH_TYPE_IP)) {
 762             if (!(w & OFPFW_NW_PROTO)) {
 763                 skip_proto = true;
 764                 if (om->nw_proto == IPPROTO_ICMP) {
 765                     ds_put_cstr(&f, "icmp,");
 766                 } else if (om->nw_proto == IPPROTO_TCP) {
 767                     ds_put_cstr(&f, "tcp,");
 768                 } else if (om->nw_proto == IPPROTO_UDP) {
 769                     ds_put_cstr(&f, "udp,");
 770                 } else {
 771                     ds_put_cstr(&f, "ip,");
 772                     skip_proto = false;
 773                 }
 774             } else {
 775                 ds_put_cstr(&f, "ip,");
 776             }
 777         } else if (om->dl_type == htons(ETH_TYPE_ARP)) {
 778             ds_put_cstr(&f, "arp,");
 779         } else {
 780             skip_type = false;
 781         }
 782     }
 783     if (w & NXFW_TUN_ID) {
 784         ds_put_cstr(&f, "tun_id_wild,");
 785     }
 786     print_wild(&f, "in_port=", w & OFPFW_IN_PORT, verbosity,
 787                "%d", ntohs(om->in_port));
 788     print_wild(&f, "dl_vlan=", w & OFPFW_DL_VLAN, verbosity,
 789                "%d", ntohs(om->dl_vlan));
 790     print_wild(&f, "dl_vlan_pcp=", w & OFPFW_DL_VLAN_PCP, verbosity,
 791                "%d", om->dl_vlan_pcp);
 792     print_wild(&f, "dl_src=", w & OFPFW_DL_SRC, verbosity,
 793                ETH_ADDR_FMT, ETH_ADDR_ARGS(om->dl_src));
 794     print_wild(&f, "dl_dst=", w & OFPFW_DL_DST, verbosity,
 795                ETH_ADDR_FMT, ETH_ADDR_ARGS(om->dl_dst));
 796     if (!skip_type) {
 797         print_wild(&f, "dl_type=", w & OFPFW_DL_TYPE, verbosity,
 798                    "0x%04x", ntohs(om->dl_type));
 799     }
 800     print_ip_netmask(&f, "nw_src=", om->nw_src,
 801                      (w & OFPFW_NW_SRC_MASK) >> OFPFW_NW_SRC_SHIFT, verbosity);
 802     print_ip_netmask(&f, "nw_dst=", om->nw_dst,
 803                      (w & OFPFW_NW_DST_MASK) >> OFPFW_NW_DST_SHIFT, verbosity);
 804     if (!skip_proto) {
 805         if (om->dl_type == htons(ETH_TYPE_ARP)) {
 806             print_wild(&f, "opcode=", w & OFPFW_NW_PROTO, verbosity,
 807                        "%u", om->nw_proto);
 808         } else {
 809             print_wild(&f, "nw_proto=", w & OFPFW_NW_PROTO, verbosity,
 810                        "%u", om->nw_proto);
 811         }
 812     }
 813     print_wild(&f, "nw_tos=", w & OFPFW_NW_TOS, verbosity,
 814                "%u", om->nw_tos);
 815     if (om->nw_proto == IPPROTO_ICMP) {
 816         print_wild(&f, "icmp_type=", w & OFPFW_ICMP_TYPE, verbosity,
 817                    "%d", ntohs(om->icmp_type));
 818         print_wild(&f, "icmp_code=", w & OFPFW_ICMP_CODE, verbosity,
 819                    "%d", ntohs(om->icmp_code));
 820     } else {
 821         print_wild(&f, "tp_src=", w & OFPFW_TP_SRC, verbosity,
 822                    "%d", ntohs(om->tp_src));
 823         print_wild(&f, "tp_dst=", w & OFPFW_TP_DST, verbosity,
 824                    "%d", ntohs(om->tp_dst));
 825     }
 826     if (ds_last(&f) == ',') {
 827         f.length--;
 828     }
 829     return ds_cstr(&f);
 830 }
 831
 832 static void
 833 ofp_print_flow_mod(struct ds *s, const struct ofp_header *oh,
 834                    enum ofputil_msg_code code, int verbosity)
 835 {
 836     struct flow_mod fm;
 837     bool need_priority;
 838     int error;
 839
 840     error = ofputil_decode_flow_mod(&fm, oh, NXFF_OPENFLOW10);
 841     if (error) {
 842         ofp_print_error(s, error);
 843         return;
 844     }
 845
 846     ds_put_char(s, ' ');
 847     switch (fm.command) {
 848     case OFPFC_ADD:
 849         ds_put_cstr(s, "ADD");
 850         break;
 851     case OFPFC_MODIFY:
 852         ds_put_cstr(s, "MOD");
 853         break;
 854     case OFPFC_MODIFY_STRICT:
 855         ds_put_cstr(s, "MOD_STRICT");
 856         break;
 857     case OFPFC_DELETE:
 858         ds_put_cstr(s, "DEL");
 859         break;
 860     case OFPFC_DELETE_STRICT:
 861         ds_put_cstr(s, "DEL_STRICT");
 862         break;
 863     default:
 864         ds_put_format(s, "cmd:%d", fm.command);
 865     }
 866
 867     ds_put_char(s, ' ');
 868     if (verbosity >= 3 && code == OFPUTIL_OFPT_FLOW_MOD) {
 869         const struct ofp_flow_mod *ofm = (const struct ofp_flow_mod *) oh;
 870         ofp_print_match(s, &ofm->match, verbosity);
 871
 872         /* ofp_print_match() doesn't print priority. */
 873         need_priority = true;
 874     } else if (verbosity >= 3 && code == OFPUTIL_NXT_FLOW_MOD) {
 875         const struct nx_flow_mod *nfm = (const struct nx_flow_mod *) oh;
 876         const void *nxm = nfm + 1;
 877         char *nxm_s;
 878
 879         nxm_s = nx_match_to_string(nxm, ntohs(nfm->match_len));
 880         ds_put_cstr(s, nxm_s);
 881         free(nxm_s);
 882
 883         /* nx_match_to_string() doesn't print priority. */
 884         need_priority = true;
 885     } else {
 886         cls_rule_format(&fm.cr, s);
 887
 888         /* cls_rule_format() does print priority. */
 889         need_priority = false;
 890     }
 891
 892     if (ds_last(s) != ' ') {
 893         ds_put_char(s, ' ');
 894     }
 895     if (fm.cookie != htonll(0)) {
 896         ds_put_format(s, "cookie:0x%"PRIx64" ", ntohll(fm.cookie));
 897     }
 898     if (fm.idle_timeout != OFP_FLOW_PERMANENT) {
 899         ds_put_format(s, "idle:%"PRIu16" ", fm.idle_timeout);
 900     }
 901     if (fm.hard_timeout != OFP_FLOW_PERMANENT) {
 902         ds_put_format(s, "hard:%"PRIu16" ", fm.hard_timeout);
 903     }
 904     if (fm.cr.priority != OFP_DEFAULT_PRIORITY && need_priority) {
 905         ds_put_format(s, "pri:%"PRIu16" ", fm.cr.priority);
 906     }
 907     if (fm.buffer_id != UINT32_MAX) {
 908         ds_put_format(s, "buf:0x%"PRIx32" ", fm.buffer_id);
 909     }
 910     if (fm.flags != 0) {
 911         ds_put_format(s, "flags:0x%"PRIx16" ", fm.flags);
 912     }
 913
 914     ofp_print_actions(s, (const struct ofp_action_header *) fm.actions,
 915                       fm.n_actions * sizeof *fm.actions);
 916 }
 917
 918 static void
 919 ofp_print_duration(struct ds *string, unsigned int sec, unsigned int nsec)
 920 {
 921     ds_put_format(string, "%u", sec);
 922     if (nsec > 0) {
 923         ds_put_format(string, ".%09u", nsec);
 924         while (string->string[string->length - 1] == '0') {
 925             string->length--;
 926         }
 927     }
 928     ds_put_char(string, 's');
 929 }
 930
 931 static void
 932 ofp_print_flow_removed(struct ds *string, const struct ofp_header *oh)
 933 {
 934     struct ofputil_flow_removed fr;
 935     int error;
 936
 937     error = ofputil_decode_flow_removed(&fr, oh, NXFF_OPENFLOW10);
 938     if (error) {
 939         ofp_print_error(string, error);
 940         return;
 941     }
 942
 943     ds_put_char(string, ' ');
 944     cls_rule_format(&fr.rule, string);
 945
 946     ds_put_cstr(string, " reason=");
 947     switch (fr.reason) {
 948     case OFPRR_IDLE_TIMEOUT:
 949         ds_put_cstr(string, "idle");
 950         break;
 951     case OFPRR_HARD_TIMEOUT:
 952         ds_put_cstr(string, "hard");
 953         break;
 954     case OFPRR_DELETE:
 955         ds_put_cstr(string, "delete");
 956         break;
 957     default:
 958         ds_put_format(string, "**%"PRIu8"**", fr.reason);
 959         break;
 960     }
 961
 962     if (fr.cookie != htonll(0)) {
 963         ds_put_format(string, " cookie:0x%"PRIx64, ntohll(fr.cookie));
 964     }
 965     ds_put_cstr(string, " duration");
 966     ofp_print_duration(string, fr.duration_sec, fr.duration_nsec);
 967     ds_put_format(string, " idle%"PRIu16" pkts%"PRIu64" bytes%"PRIu64"\n",
 968          fr.idle_timeout, fr.packet_count, fr.byte_count);
 969 }
 970
 971 static void
 972 ofp_print_port_mod(struct ds *string, const struct ofp_port_mod *opm)
 973 {
 974     ds_put_format(string, "port: %d: addr:"ETH_ADDR_FMT", config: %#x, mask:%#x\n",
 975             ntohs(opm->port_no), ETH_ADDR_ARGS(opm->hw_addr),
 976             ntohl(opm->config), ntohl(opm->mask));
 977     ds_put_format(string, "     advertise: ");
 978     if (opm->advertise) {
 979         ofp_print_port_features(string, ntohl(opm->advertise));
 980     } else {
 981         ds_put_format(string, "UNCHANGED\n");
 982     }
 983 }
 984
 985 static void
 986 ofp_print_error(struct ds *string, int error)
 987 {
 988     if (string->length) {
 989         ds_put_char(string, ' ');
 990     }
 991     ds_put_cstr(string, "***decode error: ");
 992     ofputil_format_error(string, error);
 993     ds_put_cstr(string, "***\n");
 994 }
 995
 996 static void
 997 ofp_print_error_msg(struct ds *string, const struct ofp_error_msg *oem)
 998 {
 999     size_t len = ntohs(oem->header.length);
1000     size_t payload_ofs, payload_len;
1001     const void *payload;
1002     int error;
1003     char *s;
1004
1005     error = ofputil_decode_error_msg(&oem->header, &payload_ofs);
1006     if (!is_ofp_error(error)) {
1007         ofp_print_error(string, error);
1008         ds_put_hex_dump(string, oem->data, len - sizeof *oem, 0, true);
1009         return;
1010     }
1011
1012     ds_put_char(string, ' ');
1013     ofputil_format_error(string, error);
1014     ds_put_char(string, '\n');
1015
1016     payload = (const uint8_t *) oem + payload_ofs;
1017     payload_len = len - payload_ofs;
1018     switch (get_ofp_err_type(error)) {
1019     case OFPET_HELLO_FAILED:
1020         ds_put_printable(string, payload, payload_len);
1021         break;
1022
1023     case OFPET_BAD_REQUEST:
1024         s = ofp_to_string(payload, payload_len, 1);
1025         ds_put_cstr(string, s);
1026         free(s);
1027         break;
1028
1029     default:
1030         ds_put_hex_dump(string, payload, payload_len, 0, true);
1031         break;
1032     }
1033 }
1034
1035 static void
1036 ofp_print_port_status(struct ds *string, const struct ofp_port_status *ops)
1037 {
1038     if (ops->reason == OFPPR_ADD) {
1039         ds_put_format(string, " ADD:");
1040     } else if (ops->reason == OFPPR_DELETE) {
1041         ds_put_format(string, " DEL:");
1042     } else if (ops->reason == OFPPR_MODIFY) {
1043         ds_put_format(string, " MOD:");
1044     }
1045
1046     ofp_print_phy_port(string, &ops->desc);
1047 }
1048
1049 static void
1050 ofp_print_ofpst_desc_reply(struct ds *string, const struct ofp_header *oh)
1051 {
1052     const struct ofp_desc_stats *ods = ofputil_stats_body(oh);
1053
1054     ds_put_char(string, '\n');
1055     ds_put_format(string, "Manufacturer: %.*s\n",
1056             (int) sizeof ods->mfr_desc, ods->mfr_desc);
1057     ds_put_format(string, "Hardware: %.*s\n",
1058             (int) sizeof ods->hw_desc, ods->hw_desc);
1059     ds_put_format(string, "Software: %.*s\n",
1060             (int) sizeof ods->sw_desc, ods->sw_desc);
1061     ds_put_format(string, "Serial Num: %.*s\n",
1062             (int) sizeof ods->serial_num, ods->serial_num);
1063     ds_put_format(string, "DP Description: %.*s\n",
1064             (int) sizeof ods->dp_desc, ods->dp_desc);
1065 }
1066
1067 static void
1068 ofp_print_flow_stats_request(struct ds *string, const struct ofp_header *oh)
1069 {
1070     struct flow_stats_request fsr;
1071     int error;
1072
1073     error = ofputil_decode_flow_stats_request(&fsr, oh, NXFF_OPENFLOW10);
1074     if (error) {
1075         ofp_print_error(string, error);
1076         return;
1077     }
1078
1079     if (fsr.table_id != 0xff) {
1080         ds_put_format(string, " table_id=%"PRIu8, fsr.table_id);
1081     }
1082
1083     if (fsr.out_port != OFPP_NONE) {
1084         ds_put_cstr(string, " out_port=");
1085         ofp_print_port_name(string, fsr.out_port);
1086     }
1087
1088     /* A flow stats request doesn't include a priority, but cls_rule_format()
1089      * will print one unless it is OFP_DEFAULT_PRIORITY. */
1090     fsr.match.priority = OFP_DEFAULT_PRIORITY;
1091
1092     ds_put_char(string, ' ');
1093     cls_rule_format(&fsr.match, string);
1094 }
1095
1096 static void
1097 ofp_print_flow_stats_reply(struct ds *string, const struct ofp_header *oh)
1098 {
1099     struct ofpbuf b;
1100
1101     ofpbuf_use_const(&b, oh, ntohs(oh->length));
1102     for (;;) {
1103         struct ofputil_flow_stats fs;
1104         int retval;
1105
1106         retval = ofputil_decode_flow_stats_reply(&fs, &b, NXFF_OPENFLOW10);
1107         if (retval) {
1108             if (retval != EOF) {
1109                 ds_put_cstr(string, " ***parse error***");
1110             }
1111             break;
1112         }
1113
1114         ds_put_char(string, '\n');
1115
1116         ds_put_format(string, " cookie=0x%"PRIx64", duration=",
1117                       ntohll(fs.cookie));
1118         ofp_print_duration(string, fs.duration_sec, fs.duration_nsec);
1119         ds_put_format(string, ", table_id=%"PRIu8", ", fs.table_id);
1120         ds_put_format(string, "n_packets=%"PRIu64", ", fs.packet_count);
1121         ds_put_format(string, "n_bytes=%"PRIu64", ", fs.byte_count);
1122         if (fs.idle_timeout != OFP_FLOW_PERMANENT) {
1123             ds_put_format(string, "idle_timeout=%"PRIu16",", fs.idle_timeout);
1124         }
1125         if (fs.hard_timeout != OFP_FLOW_PERMANENT) {
1126             ds_put_format(string, "hard_timeout=%"PRIu16",", fs.hard_timeout);
1127         }
1128
1129         cls_rule_format(&fs.rule, string);
1130         ds_put_char(string, ' ');
1131         ofp_print_actions(string,
1132                           (const struct ofp_action_header *) fs.actions,
1133                           fs.n_actions * sizeof *fs.actions);
1134      }
1135 }
1136
1137 static void
1138 ofp_print_ofp_aggregate_stats_reply (
1139     struct ds *string, const struct ofp_aggregate_stats_reply *asr)
1140 {
1141     ds_put_format(string, " packet_count=%"PRIu64,
1142                   ntohll(get_32aligned_be64(&asr->packet_count)));
1143     ds_put_format(string, " byte_count=%"PRIu64,
1144                   ntohll(get_32aligned_be64(&asr->byte_count)));
1145     ds_put_format(string, " flow_count=%"PRIu32, ntohl(asr->flow_count));
1146 }
1147
1148 static void
1149 ofp_print_ofpst_aggregate_reply(struct ds *string, const struct ofp_header *oh)
1150 {
1151     ofp_print_ofp_aggregate_stats_reply(string, ofputil_stats_body(oh));
1152 }
1153
1154 static void
1155 ofp_print_nxst_aggregate_reply(struct ds *string,
1156                                const struct nx_aggregate_stats_reply *nasr)
1157 {
1158     ofp_print_ofp_aggregate_stats_reply(string, &nasr->asr);
1159 }
1160
1161 static void print_port_stat(struct ds *string, const char *leader,
1162                             const ovs_32aligned_be64 *statp, int more)
1163 {
1164     uint64_t stat = ntohll(get_32aligned_be64(statp));
1165
1166     ds_put_cstr(string, leader);
1167     if (stat != UINT64_MAX) {
1168         ds_put_format(string, "%"PRIu64, stat);
1169     } else {
1170         ds_put_char(string, '?');
1171     }
1172     if (more) {
1173         ds_put_cstr(string, ", ");
1174     } else {
1175         ds_put_cstr(string, "\n");
1176     }
1177 }
1178
1179 static void
1180 ofp_print_ofpst_port_request(struct ds *string, const struct ofp_header *oh)
1181 {
1182     const struct ofp_port_stats_request *psr = ofputil_stats_body(oh);
1183     ds_put_format(string, " port_no=%"PRIu16, ntohs(psr->port_no));
1184 }
1185
1186 static void
1187 ofp_print_ofpst_port_reply(struct ds *string, const struct ofp_header *oh,
1188                            int verbosity)
1189 {
1190     const struct ofp_port_stats *ps = ofputil_stats_body(oh);
1191     size_t n = ofputil_stats_body_len(oh) / sizeof *ps;
1192     ds_put_format(string, " %zu ports\n", n);
1193     if (verbosity < 1) {
1194         return;
1195     }
1196
1197     for (; n--; ps++) {
1198         ds_put_format(string, "  port %2"PRIu16": ", ntohs(ps->port_no));
1199
1200         ds_put_cstr(string, "rx ");
1201         print_port_stat(string, "pkts=", &ps->rx_packets, 1);
1202         print_port_stat(string, "bytes=", &ps->rx_bytes, 1);
1203         print_port_stat(string, "drop=", &ps->rx_dropped, 1);
1204         print_port_stat(string, "errs=", &ps->rx_errors, 1);
1205         print_port_stat(string, "frame=", &ps->rx_frame_err, 1);
1206         print_port_stat(string, "over=", &ps->rx_over_err, 1);
1207         print_port_stat(string, "crc=", &ps->rx_crc_err, 0);
1208
1209         ds_put_cstr(string, "           tx ");
1210         print_port_stat(string, "pkts=", &ps->tx_packets, 1);
1211         print_port_stat(string, "bytes=", &ps->tx_bytes, 1);
1212         print_port_stat(string, "drop=", &ps->tx_dropped, 1);
1213         print_port_stat(string, "errs=", &ps->tx_errors, 1);
1214         print_port_stat(string, "coll=", &ps->collisions, 0);
1215     }
1216 }
1217
1218 static void
1219 ofp_print_ofpst_table_reply(struct ds *string, const struct ofp_header *oh,
1220                             int verbosity)
1221 {
1222     const struct ofp_table_stats *ts = ofputil_stats_body(oh);
1223     size_t n = ofputil_stats_body_len(oh) / sizeof *ts;
1224     ds_put_format(string, " %zu tables\n", n);
1225     if (verbosity < 1) {
1226         return;
1227     }
1228
1229     for (; n--; ts++) {
1230         char name[OFP_MAX_TABLE_NAME_LEN + 1];
1231         ovs_strlcpy(name, ts->name, sizeof name);
1232
1233         ds_put_format(string, "  %d: %-8s: ", ts->table_id, name);
1234         ds_put_format(string, "wild=0x%05"PRIx32", ", ntohl(ts->wildcards));
1235         ds_put_format(string, "max=%6"PRIu32", ", ntohl(ts->max_entries));
1236         ds_put_format(string, "active=%"PRIu32"\n", ntohl(ts->active_count));
1237         ds_put_cstr(string, "               ");
1238         ds_put_format(string, "lookup=%"PRIu64", ",
1239                       ntohll(get_32aligned_be64(&ts->lookup_count)));
1240         ds_put_format(string, "matched=%"PRIu64"\n",
1241                       ntohll(get_32aligned_be64(&ts->matched_count)));
1242      }
1243 }
1244
1245 static void
1246 ofp_print_queue_name(struct ds *string, uint32_t queue_id)
1247 {
1248     if (queue_id == OFPQ_ALL) {
1249         ds_put_cstr(string, "ALL");
1250     } else {
1251         ds_put_format(string, "%"PRIu32, queue_id);
1252     }
1253 }
1254
1255 static void
1256 ofp_print_ofpst_queue_request(struct ds *string, const struct ofp_header *oh)
1257 {
1258     const struct ofp_queue_stats_request *qsr = ofputil_stats_body(oh);
1259
1260     ds_put_cstr(string, "port=");
1261     ofp_print_port_name(string, ntohs(qsr->port_no));
1262
1263     ds_put_cstr(string, " queue=");
1264     ofp_print_queue_name(string, ntohl(qsr->queue_id));
1265 }
1266
1267 static void
1268 ofp_print_ofpst_queue_reply(struct ds *string, const struct ofp_header *oh,
1269                             int verbosity)
1270 {
1271     const struct ofp_queue_stats *qs = ofputil_stats_body(oh);
1272     size_t n = ofputil_stats_body_len(oh) / sizeof *qs;
1273     ds_put_format(string, " %zu queues\n", n);
1274     if (verbosity < 1) {
1275         return;
1276     }
1277
1278     for (; n--; qs++) {
1279         ds_put_cstr(string, "  port ");
1280         ofp_print_port_name(string, ntohs(qs->port_no));
1281         ds_put_cstr(string, " queue ");
1282         ofp_print_queue_name(string, ntohl(qs->queue_id));
1283         ds_put_cstr(string, ": ");
1284
1285         print_port_stat(string, "bytes=", &qs->tx_bytes, 1);
1286         print_port_stat(string, "pkts=", &qs->tx_packets, 1);
1287         print_port_stat(string, "errors=", &qs->tx_errors, 0);
1288     }
1289 }
1290
1291 static void
1292 ofp_print_stats_request(struct ds *string, const struct ofp_header *oh)
1293 {
1294     const struct ofp_stats_request *srq
1295         = (const struct ofp_stats_request *) oh;
1296
1297     if (srq->flags) {
1298         ds_put_format(string, " ***unknown flags 0x%04"PRIx16"***",
1299                       ntohs(srq->flags));
1300     }
1301 }
1302
1303 static void
1304 ofp_print_stats_reply(struct ds *string, const struct ofp_header *oh)
1305 {
1306     const struct ofp_stats_reply *srp = (const struct ofp_stats_reply *) oh;
1307
1308     if (srp->flags) {
1309         uint16_t flags = ntohs(srp->flags);
1310
1311         ds_put_cstr(string, " flags=");
1312         if (flags & OFPSF_REPLY_MORE) {
1313             ds_put_cstr(string, "[more]");
1314             flags &= ~OFPSF_REPLY_MORE;
1315         }
1316         if (flags) {
1317             ds_put_format(string, "[***unknown flags 0x%04"PRIx16"***]",
1318                           flags);
1319         }
1320     }
1321 }
1322
1323 static void
1324 ofp_print_echo(struct ds *string, const struct ofp_header *oh, int verbosity)
1325 {
1326     size_t len = ntohs(oh->length);
1327
1328     ds_put_format(string, " %zu bytes of payload\n", len - sizeof *oh);
1329     if (verbosity > 1) {
1330         ds_put_hex_dump(string, oh + 1, len - sizeof *oh, 0, true);
1331     }
1332 }
1333
1334 static void
1335 ofp_print_nxt_tun_id_from_cookie(struct ds *string,
1336                                  const struct nxt_tun_id_cookie *ntic)
1337 {
1338     ds_put_format(string, " set=%"PRIu8, ntic->set);
1339 }
1340
1341 static void
1342 ofp_print_nxt_role_message(struct ds *string,
1343                            const struct nx_role_request *nrr)
1344 {
1345     unsigned int role = ntohl(nrr->role);
1346
1347     ds_put_cstr(string, " role=");
1348     if (role == NX_ROLE_OTHER) {
1349         ds_put_cstr(string, "other");
1350     } else if (role == NX_ROLE_MASTER) {
1351         ds_put_cstr(string, "master");
1352     } else if (role == NX_ROLE_SLAVE) {
1353         ds_put_cstr(string, "slave");
1354     } else {
1355         ds_put_format(string, "%u", role);
1356     }
1357 }
1358
1359 static void
1360 ofp_print_nxt_set_flow_format(struct ds *string,
1361                               const struct nxt_set_flow_format *nsff)
1362 {
1363     uint32_t format = ntohl(nsff->format);
1364
1365     ds_put_cstr(string, " format=");
1366     if (ofputil_flow_format_is_valid(format)) {
1367         ds_put_cstr(string, ofputil_flow_format_to_string(format));
1368     } else {
1369         ds_put_format(string, "%"PRIu32, format);
1370     }
1371 }
1372
1373 static void
1374 ofp_to_string__(const struct ofp_header *oh,
1375                 const struct ofputil_msg_type *type, struct ds *string,
1376                 int verbosity)
1377 {
1378     enum ofputil_msg_code code;
1379     const void *msg = oh;
1380
1381     ds_put_format(string, "%s (xid=0x%"PRIx32"):",
1382                   ofputil_msg_type_name(type), ntohl(oh->xid));
1383
1384     code = ofputil_msg_type_code(type);
1385     switch (code) {
1386     case OFPUTIL_INVALID:
1387         break;
1388
1389     case OFPUTIL_OFPT_HELLO:
1390         ds_put_char(string, '\n');
1391         ds_put_hex_dump(string, oh + 1, ntohs(oh->length) - sizeof *oh,
1392                         0, true);
1393         break;
1394
1395     case OFPUTIL_OFPT_ERROR:
1396         ofp_print_error_msg(string, msg);
1397         break;
1398
1399     case OFPUTIL_OFPT_ECHO_REQUEST:
1400     case OFPUTIL_OFPT_ECHO_REPLY:
1401         ofp_print_echo(string, oh, verbosity);
1402         break;
1403
1404     case OFPUTIL_OFPT_FEATURES_REQUEST:
1405         break;
1406
1407     case OFPUTIL_OFPT_FEATURES_REPLY:
1408         ofp_print_switch_features(string, msg);
1409         break;
1410
1411     case OFPUTIL_OFPT_GET_CONFIG_REQUEST:
1412         break;
1413
1414     case OFPUTIL_OFPT_GET_CONFIG_REPLY:
1415     case OFPUTIL_OFPT_SET_CONFIG:
1416         ofp_print_switch_config(string, msg);
1417         break;
1418
1419     case OFPUTIL_OFPT_PACKET_IN:
1420         ofp_print_packet_in(string, msg, verbosity);
1421         break;
1422
1423     case OFPUTIL_OFPT_FLOW_REMOVED:
1424     case OFPUTIL_NXT_FLOW_REMOVED:
1425         ofp_print_flow_removed(string, msg);
1426         break;
1427
1428     case OFPUTIL_OFPT_PORT_STATUS:
1429         ofp_print_port_status(string, msg);
1430         break;
1431
1432     case OFPUTIL_OFPT_PACKET_OUT:
1433         ofp_print_packet_out(string, msg, verbosity);
1434         break;
1435
1436     case OFPUTIL_OFPT_FLOW_MOD:
1437         ofp_print_flow_mod(string, msg, code, verbosity);
1438         break;
1439
1440     case OFPUTIL_OFPT_PORT_MOD:
1441         ofp_print_port_mod(string, msg);
1442         break;
1443
1444     case OFPUTIL_OFPT_BARRIER_REQUEST:
1445     case OFPUTIL_OFPT_BARRIER_REPLY:
1446         break;
1447
1448     case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REQUEST:
1449     case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REPLY:
1450         /* XXX */
1451         break;
1452
1453     case OFPUTIL_OFPST_DESC_REQUEST:
1454         ofp_print_stats_request(string, oh);
1455         break;
1456
1457     case OFPUTIL_OFPST_FLOW_REQUEST:
1458     case OFPUTIL_NXST_FLOW_REQUEST:
1459     case OFPUTIL_OFPST_AGGREGATE_REQUEST:
1460     case OFPUTIL_NXST_AGGREGATE_REQUEST:
1461         ofp_print_stats_request(string, oh);
1462         ofp_print_flow_stats_request(string, oh);
1463         break;
1464
1465     case OFPUTIL_OFPST_TABLE_REQUEST:
1466         ofp_print_stats_request(string, oh);
1467         break;
1468
1469     case OFPUTIL_OFPST_PORT_REQUEST:
1470         ofp_print_stats_request(string, oh);
1471         ofp_print_ofpst_port_request(string, oh);
1472         break;
1473
1474     case OFPUTIL_OFPST_QUEUE_REQUEST:
1475         ofp_print_stats_request(string, oh);
1476         ofp_print_ofpst_queue_request(string, oh);
1477         break;
1478
1479     case OFPUTIL_OFPST_DESC_REPLY:
1480         ofp_print_stats_reply(string, oh);
1481         ofp_print_ofpst_desc_reply(string, oh);
1482         break;
1483
1484     case OFPUTIL_OFPST_FLOW_REPLY:
1485     case OFPUTIL_NXST_FLOW_REPLY:
1486         ofp_print_stats_reply(string, oh);
1487         ofp_print_flow_stats_reply(string, oh);
1488         break;
1489
1490     case OFPUTIL_OFPST_QUEUE_REPLY:
1491         ofp_print_stats_reply(string, oh);
1492         ofp_print_ofpst_queue_reply(string, oh, verbosity);
1493         break;
1494
1495     case OFPUTIL_OFPST_PORT_REPLY:
1496         ofp_print_stats_reply(string, oh);
1497         ofp_print_ofpst_port_reply(string, oh, verbosity);
1498         break;
1499
1500     case OFPUTIL_OFPST_TABLE_REPLY:
1501         ofp_print_stats_reply(string, oh);
1502         ofp_print_ofpst_table_reply(string, oh, verbosity);
1503         break;
1504
1505     case OFPUTIL_OFPST_AGGREGATE_REPLY:
1506         ofp_print_stats_reply(string, oh);
1507         ofp_print_ofpst_aggregate_reply(string, oh);
1508         break;
1509
1510     case OFPUTIL_NXT_TUN_ID_FROM_COOKIE:
1511         ofp_print_nxt_tun_id_from_cookie(string, msg);
1512         break;
1513
1514     case OFPUTIL_NXT_ROLE_REQUEST:
1515     case OFPUTIL_NXT_ROLE_REPLY:
1516         ofp_print_nxt_role_message(string, msg);
1517         break;
1518
1519     case OFPUTIL_NXT_SET_FLOW_FORMAT:
1520         ofp_print_nxt_set_flow_format(string, msg);
1521         break;
1522
1523     case OFPUTIL_NXT_FLOW_MOD:
1524         ofp_print_flow_mod(string, msg, code, verbosity);
1525         break;
1526
1527     case OFPUTIL_NXST_AGGREGATE_REPLY:
1528         ofp_print_stats_reply(string, oh);
1529         ofp_print_nxst_aggregate_reply(string, msg);
1530         break;
1531     }
1532 }
1533
1534 /* Composes and returns a string representing the OpenFlow packet of 'len'
1535  * bytes at 'oh' at the given 'verbosity' level.  0 is a minimal amount of
1536  * verbosity and higher numbers increase verbosity.  The caller is responsible
1537  * for freeing the string. */
1538 char *
1539 ofp_to_string(const void *oh_, size_t len, int verbosity)
1540 {
1541     struct ds string = DS_EMPTY_INITIALIZER;
1542     const struct ofp_header *oh = oh_;
1543
1544     if (!len) {
1545         ds_put_cstr(&string, "OpenFlow message is empty\n");
1546     } else if (len < sizeof(struct ofp_header)) {
1547         ds_put_format(&string, "OpenFlow packet too short (only %zu bytes):\n",
1548                       len);
1549     } else if (oh->version != OFP_VERSION) {
1550         ds_put_format(&string, "Bad OpenFlow version %"PRIu8":\n",
1551                       oh->version);
1552     } else if (ntohs(oh->length) > len) {
1553         ds_put_format(&string,
1554                       "(***truncated to %zu bytes from %"PRIu16"***)\n",
1555                       len, ntohs(oh->length));
1556     } else if (ntohs(oh->length) < len) {
1557         ds_put_format(&string,
1558                       "(***only uses %"PRIu16" bytes out of %zu***)\n",
1559                       ntohs(oh->length), len);
1560     } else {
1561         const struct ofputil_msg_type *type;
1562         int error;
1563
1564         error = ofputil_decode_msg_type(oh, &type);
1565         if (!error) {
1566             ofp_to_string__(oh, type, &string, verbosity);
1567             if (verbosity >= 5) {
1568                 if (ds_last(&string) != '\n') {
1569                     ds_put_char(&string, '\n');
1570                 }
1571                 ds_put_hex_dump(&string, oh, len, 0, true);
1572             }
1573             if (ds_last(&string) != '\n') {
1574                 ds_put_char(&string, '\n');
1575             }
1576             return ds_steal_cstr(&string);
1577         }
1578
1579         ofp_print_error(&string, error);
1580     }
1581     ds_put_hex_dump(&string, oh, len, 0, true);
1582     return ds_steal_cstr(&string);
1583 }
1584
1585 /* Returns the name for the specified OpenFlow message type as a string,
1586  * e.g. "OFPT_FEATURES_REPLY".  If no name is known, the string returned is a
1587  * hex number, e.g. "0x55".
1588  *
1589  * The caller must free the returned string when it is no longer needed. */
1590 char *
1591 ofp_message_type_to_string(uint8_t type)
1592 {
1593     const char *name;
1594
1595     switch (type) {
1596     case OFPT_HELLO:
1597         name = "HELLO";
1598         break;
1599     case OFPT_ERROR:
1600         name = "ERROR";
1601         break;
1602     case OFPT_ECHO_REQUEST:
1603         name = "ECHO_REQUEST";
1604         break;
1605     case OFPT_ECHO_REPLY:
1606         name = "ECHO_REPLY";
1607         break;
1608     case OFPT_VENDOR:
1609         name = "VENDOR";
1610         break;
1611     case OFPT_FEATURES_REQUEST:
1612         name = "FEATURES_REQUEST";
1613         break;
1614     case OFPT_FEATURES_REPLY:
1615         name = "FEATURES_REPLY";
1616         break;
1617     case OFPT_GET_CONFIG_REQUEST:
1618         name = "GET_CONFIG_REQUEST";
1619         break;
1620     case OFPT_GET_CONFIG_REPLY:
1621         name = "GET_CONFIG_REPLY";
1622         break;
1623     case OFPT_SET_CONFIG:
1624         name = "SET_CONFIG";
1625         break;
1626     case OFPT_PACKET_IN:
1627         name = "PACKET_IN";
1628         break;
1629     case OFPT_FLOW_REMOVED:
1630         name = "FLOW_REMOVED";
1631         break;
1632     case OFPT_PORT_STATUS:
1633         name = "PORT_STATUS";
1634         break;
1635     case OFPT_PACKET_OUT:
1636         name = "PACKET_OUT";
1637         break;
1638     case OFPT_FLOW_MOD:
1639         name = "FLOW_MOD";
1640         break;
1641     case OFPT_PORT_MOD:
1642         name = "PORT_MOD";
1643         break;
1644     case OFPT_STATS_REQUEST:
1645         name = "STATS_REQUEST";
1646         break;
1647     case OFPT_STATS_REPLY:
1648         name = "STATS_REPLY";
1649         break;
1650     case OFPT_BARRIER_REQUEST:
1651         name = "BARRIER_REQUEST";
1652         break;
1653     case OFPT_BARRIER_REPLY:
1654         name = "BARRIER_REPLY";
1655         break;
1656     case OFPT_QUEUE_GET_CONFIG_REQUEST:
1657         name = "QUEUE_GET_CONFIG_REQUEST";
1658         break;
1659     case OFPT_QUEUE_GET_CONFIG_REPLY:
1660         name = "QUEUE_GET_CONFIG_REPLY";
1661         break;
1662     default:
1663         name = NULL;
1664         break;
1665     }
1666
1667     return name ? xasprintf("OFPT_%s", name) : xasprintf("0x%02"PRIx8, type);
1668 }
1669 \f
1670 static void
1671 print_and_free(FILE *stream, char *string)
1672 {
1673     fputs(string, stream);
1674     free(string);
1675 }
1676
1677 /* Pretty-print the OpenFlow packet of 'len' bytes at 'oh' to 'stream' at the
1678  * given 'verbosity' level.  0 is a minimal amount of verbosity and higher
1679  * numbers increase verbosity. */
1680 void
1681 ofp_print(FILE *stream, const void *oh, size_t len, int verbosity)
1682 {
1683     print_and_free(stream, ofp_to_string(oh, len, verbosity));
1684 }
1685
1686 /* Dumps the contents of the Ethernet frame in the 'len' bytes starting at
1687  * 'data' to 'stream' using tcpdump.  'total_len' specifies the full length of
1688  * the Ethernet frame (of which 'len' bytes were captured).
1689  *
1690  * This starts and kills a tcpdump subprocess so it's quite expensive. */
1691 void
1692 ofp_print_packet(FILE *stream, const void *data, size_t len, size_t total_len)
1693 {
1694     print_and_free(stream, ofp_packet_to_string(data, len, total_len));
1695 }