lib/ofp-print.c

   1 /*
   2  * Copyright (c) 2008, 2009, 2010 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 "compiler.h"
  30 #include "dynamic-string.h"
  31 #include "flow.h"
  32 #include "ofpbuf.h"
  33 #include "openflow/openflow.h"
  34 #include "openflow/nicira-ext.h"
  35 #include "packets.h"
  36 #include "pcap.h"
  37 #include "util.h"
  38 #include "xtoxll.h"
  39
  40 static void ofp_print_port_name(struct ds *string, uint16_t port);
  41 static void ofp_print_queue_name(struct ds *string, uint32_t port);
  42
  43 /* Returns a string that represents the contents of the Ethernet frame in the
  44  * 'len' bytes starting at 'data' to 'stream' as output by tcpdump.
  45  * 'total_len' specifies the full length of the Ethernet frame (of which 'len'
  46  * bytes were captured).
  47  *
  48  * The caller must free the returned string.
  49  *
  50  * This starts and kills a tcpdump subprocess so it's quite expensive. */
  51 char *
  52 ofp_packet_to_string(const void *data, size_t len, size_t total_len OVS_UNUSED)
  53 {
  54     struct ds ds = DS_EMPTY_INITIALIZER;
  55     struct ofpbuf buf;
  56
  57     char command[128];
  58     FILE *pcap;
  59     FILE *tcpdump;
  60     int status;
  61     int c;
  62
  63     buf.data = (void *) data;
  64     buf.size = len;
  65
  66     pcap = tmpfile();
  67     if (!pcap) {
  68         ovs_error(errno, "tmpfile");
  69         return xstrdup("<error>");
  70     }
  71     pcap_write_header(pcap);
  72     pcap_write(pcap, &buf);
  73     fflush(pcap);
  74     if (ferror(pcap)) {
  75         ovs_error(errno, "error writing temporary file");
  76     }
  77     rewind(pcap);
  78
  79     snprintf(command, sizeof command, "/usr/sbin/tcpdump -e -n -r /dev/fd/%d 2>/dev/null",
  80              fileno(pcap));
  81     tcpdump = popen(command, "r");
  82     fclose(pcap);
  83     if (!tcpdump) {
  84         ovs_error(errno, "exec(\"%s\")", command);
  85         return xstrdup("<error>");
  86     }
  87
  88     while ((c = getc(tcpdump)) != EOF) {
  89         ds_put_char(&ds, c);
  90     }
  91
  92     status = pclose(tcpdump);
  93     if (WIFEXITED(status)) {
  94         if (WEXITSTATUS(status))
  95             ovs_error(0, "tcpdump exited with status %d", WEXITSTATUS(status));
  96     } else if (WIFSIGNALED(status)) {
  97         ovs_error(0, "tcpdump exited with signal %d", WTERMSIG(status));
  98     }
  99     return ds_cstr(&ds);
 100 }
 101
 102 /* Pretty-print the OFPT_PACKET_IN packet of 'len' bytes at 'oh' to 'stream'
 103  * at the given 'verbosity' level. */
 104 static void
 105 ofp_packet_in(struct ds *string, const void *oh, size_t len, int verbosity)
 106 {
 107     const struct ofp_packet_in *op = oh;
 108     size_t data_len;
 109
 110     ds_put_format(string, " total_len=%"PRIu16" in_port=",
 111                   ntohs(op->total_len));
 112     ofp_print_port_name(string, ntohs(op->in_port));
 113
 114     if (op->reason == OFPR_ACTION)
 115         ds_put_cstr(string, " (via action)");
 116     else if (op->reason != OFPR_NO_MATCH)
 117         ds_put_format(string, " (***reason %"PRIu8"***)", op->reason);
 118
 119     data_len = len - offsetof(struct ofp_packet_in, data);
 120     ds_put_format(string, " data_len=%zu", data_len);
 121     if (htonl(op->buffer_id) == UINT32_MAX) {
 122         ds_put_format(string, " (unbuffered)");
 123         if (ntohs(op->total_len) != data_len)
 124             ds_put_format(string, " (***total_len != data_len***)");
 125     } else {
 126         ds_put_format(string, " buffer=0x%08"PRIx32, ntohl(op->buffer_id));
 127         if (ntohs(op->total_len) < data_len)
 128             ds_put_format(string, " (***total_len < data_len***)");
 129     }
 130     ds_put_char(string, '\n');
 131
 132     if (verbosity > 0) {
 133         flow_t flow;
 134         struct ofpbuf packet;
 135         struct ofp_match match;
 136         packet.data = (void *) op->data;
 137         packet.size = data_len;
 138         flow_extract(&packet, 0, ntohs(op->in_port), &flow);
 139         flow_to_match(&flow, 0, false, &match);
 140         ofp_print_match(string, &match, verbosity);
 141         ds_put_char(string, '\n');
 142     }
 143     if (verbosity > 1) {
 144         char *packet = ofp_packet_to_string(op->data, data_len,
 145                                             ntohs(op->total_len));
 146         ds_put_cstr(string, packet);
 147         free(packet);
 148     }
 149 }
 150
 151 static void ofp_print_port_name(struct ds *string, uint16_t port)
 152 {
 153     const char *name;
 154     switch (port) {
 155     case OFPP_IN_PORT:
 156         name = "IN_PORT";
 157         break;
 158     case OFPP_TABLE:
 159         name = "TABLE";
 160         break;
 161     case OFPP_NORMAL:
 162         name = "NORMAL";
 163         break;
 164     case OFPP_FLOOD:
 165         name = "FLOOD";
 166         break;
 167     case OFPP_ALL:
 168         name = "ALL";
 169         break;
 170     case OFPP_CONTROLLER:
 171         name = "CONTROLLER";
 172         break;
 173     case OFPP_LOCAL:
 174         name = "LOCAL";
 175         break;
 176     case OFPP_NONE:
 177         name = "NONE";
 178         break;
 179     default:
 180         ds_put_format(string, "%"PRIu16, port);
 181         return;
 182     }
 183     ds_put_cstr(string, name);
 184 }
 185
 186 static void
 187 ofp_print_nx_action(struct ds *string, const struct nx_action_header *nah)
 188 {
 189     switch (ntohs(nah->subtype)) {
 190     case NXAST_RESUBMIT: {
 191         const struct nx_action_resubmit *nar = (struct nx_action_resubmit *)nah;
 192         ds_put_format(string, "resubmit:");
 193         ofp_print_port_name(string, ntohs(nar->in_port));
 194         break;
 195     }
 196
 197     case NXAST_SET_TUNNEL: {
 198         const struct nx_action_set_tunnel *nast =
 199                                             (struct nx_action_set_tunnel *)nah;
 200         ds_put_format(string, "set_tunnel:0x%08"PRIx32, ntohl(nast->tun_id));
 201         break;
 202     }
 203
 204     case NXAST_DROP_SPOOFED_ARP:
 205         ds_put_cstr(string, "drop_spoofed_arp");
 206         break;
 207
 208     default:
 209         ds_put_format(string, "***unknown Nicira action:%d***",
 210                       ntohs(nah->subtype));
 211     }
 212 }
 213
 214 static int
 215 ofp_print_action(struct ds *string, const struct ofp_action_header *ah,
 216         size_t actions_len)
 217 {
 218     uint16_t type;
 219     size_t len;
 220
 221     struct openflow_action {
 222         size_t min_size;
 223         size_t max_size;
 224     };
 225
 226     const struct openflow_action of_actions[] = {
 227         [OFPAT_OUTPUT] = {
 228             sizeof(struct ofp_action_output),
 229             sizeof(struct ofp_action_output),
 230         },
 231         [OFPAT_SET_VLAN_VID] = {
 232             sizeof(struct ofp_action_vlan_vid),
 233             sizeof(struct ofp_action_vlan_vid),
 234         },
 235         [OFPAT_SET_VLAN_PCP] = {
 236             sizeof(struct ofp_action_vlan_pcp),
 237             sizeof(struct ofp_action_vlan_pcp),
 238         },
 239         [OFPAT_STRIP_VLAN] = {
 240             sizeof(struct ofp_action_header),
 241             sizeof(struct ofp_action_header),
 242         },
 243         [OFPAT_SET_DL_SRC] = {
 244             sizeof(struct ofp_action_dl_addr),
 245             sizeof(struct ofp_action_dl_addr),
 246         },
 247         [OFPAT_SET_DL_DST] = {
 248             sizeof(struct ofp_action_dl_addr),
 249             sizeof(struct ofp_action_dl_addr),
 250         },
 251         [OFPAT_SET_NW_SRC] = {
 252             sizeof(struct ofp_action_nw_addr),
 253             sizeof(struct ofp_action_nw_addr),
 254         },
 255         [OFPAT_SET_NW_DST] = {
 256             sizeof(struct ofp_action_nw_addr),
 257             sizeof(struct ofp_action_nw_addr),
 258         },
 259         [OFPAT_SET_NW_TOS] = {
 260             sizeof(struct ofp_action_nw_tos),
 261             sizeof(struct ofp_action_nw_tos),
 262         },
 263         [OFPAT_SET_TP_SRC] = {
 264             sizeof(struct ofp_action_tp_port),
 265             sizeof(struct ofp_action_tp_port),
 266         },
 267         [OFPAT_SET_TP_DST] = {
 268             sizeof(struct ofp_action_tp_port),
 269             sizeof(struct ofp_action_tp_port),
 270         }
 271         /* OFPAT_VENDOR is not here, since it would blow up the array size. */
 272     };
 273
 274     if (actions_len < sizeof *ah) {
 275         ds_put_format(string, "***action array too short for next action***\n");
 276         return -1;
 277     }
 278
 279     type = ntohs(ah->type);
 280     len = ntohs(ah->len);
 281     if (actions_len < len) {
 282         ds_put_format(string, "***truncated action %"PRIu16"***\n", type);
 283         return -1;
 284     }
 285
 286     if ((len % 8) != 0) {
 287         ds_put_format(string,
 288                 "***action %"PRIu16" length not a multiple of 8***\n",
 289                 type);
 290         return -1;
 291     }
 292
 293     if (type < ARRAY_SIZE(of_actions)) {
 294         const struct openflow_action *act = &of_actions[type];
 295         if ((len < act->min_size) || (len > act->max_size)) {
 296             ds_put_format(string,
 297                     "***action %"PRIu16" wrong length: %zu***\n", type, len);
 298             return -1;
 299         }
 300     }
 301
 302     switch (type) {
 303     case OFPAT_OUTPUT: {
 304         struct ofp_action_output *oa = (struct ofp_action_output *)ah;
 305         uint16_t port = ntohs(oa->port);
 306         if (port < OFPP_MAX) {
 307             ds_put_format(string, "output:%"PRIu16, port);
 308         } else {
 309             ofp_print_port_name(string, port);
 310             if (port == OFPP_CONTROLLER) {
 311                 if (oa->max_len) {
 312                     ds_put_format(string, ":%"PRIu16, ntohs(oa->max_len));
 313                 } else {
 314                     ds_put_cstr(string, ":all");
 315                 }
 316             }
 317         }
 318         break;
 319     }
 320
 321     case OFPAT_ENQUEUE: {
 322         struct ofp_action_enqueue *ea = (struct ofp_action_enqueue *)ah;
 323         unsigned int port = ntohs(ea->port);
 324         unsigned int queue_id = ntohl(ea->queue_id);
 325         ds_put_format(string, "enqueue:");
 326         if (port != OFPP_IN_PORT) {
 327             ds_put_format(string, "%u", port);
 328         } else {
 329             ds_put_cstr(string, "IN_PORT");
 330         }
 331         ds_put_format(string, "q%u", queue_id);
 332         break;
 333     }
 334
 335     case OFPAT_SET_VLAN_VID: {
 336         struct ofp_action_vlan_vid *va = (struct ofp_action_vlan_vid *)ah;
 337         ds_put_format(string, "mod_vlan_vid:%"PRIu16, ntohs(va->vlan_vid));
 338         break;
 339     }
 340
 341     case OFPAT_SET_VLAN_PCP: {
 342         struct ofp_action_vlan_pcp *va = (struct ofp_action_vlan_pcp *)ah;
 343         ds_put_format(string, "mod_vlan_pcp:%"PRIu8, va->vlan_pcp);
 344         break;
 345     }
 346
 347     case OFPAT_STRIP_VLAN:
 348         ds_put_cstr(string, "strip_vlan");
 349         break;
 350
 351     case OFPAT_SET_DL_SRC: {
 352         struct ofp_action_dl_addr *da = (struct ofp_action_dl_addr *)ah;
 353         ds_put_format(string, "mod_dl_src:"ETH_ADDR_FMT,
 354                 ETH_ADDR_ARGS(da->dl_addr));
 355         break;
 356     }
 357
 358     case OFPAT_SET_DL_DST: {
 359         struct ofp_action_dl_addr *da = (struct ofp_action_dl_addr *)ah;
 360         ds_put_format(string, "mod_dl_dst:"ETH_ADDR_FMT,
 361                 ETH_ADDR_ARGS(da->dl_addr));
 362         break;
 363     }
 364
 365     case OFPAT_SET_NW_SRC: {
 366         struct ofp_action_nw_addr *na = (struct ofp_action_nw_addr *)ah;
 367         ds_put_format(string, "mod_nw_src:"IP_FMT, IP_ARGS(&na->nw_addr));
 368         break;
 369     }
 370
 371     case OFPAT_SET_NW_DST: {
 372         struct ofp_action_nw_addr *na = (struct ofp_action_nw_addr *)ah;
 373         ds_put_format(string, "mod_nw_dst:"IP_FMT, IP_ARGS(&na->nw_addr));
 374         break;
 375     }
 376
 377     case OFPAT_SET_NW_TOS: {
 378         struct ofp_action_nw_tos *nt = (struct ofp_action_nw_tos *)ah;
 379         ds_put_format(string, "mod_nw_tos:%d", nt->nw_tos);
 380         break;
 381     }
 382
 383     case OFPAT_SET_TP_SRC: {
 384         struct ofp_action_tp_port *ta = (struct ofp_action_tp_port *)ah;
 385         ds_put_format(string, "mod_tp_src:%d", ntohs(ta->tp_port));
 386         break;
 387     }
 388
 389     case OFPAT_SET_TP_DST: {
 390         struct ofp_action_tp_port *ta = (struct ofp_action_tp_port *)ah;
 391         ds_put_format(string, "mod_tp_dst:%d", ntohs(ta->tp_port));
 392         break;
 393     }
 394
 395     case OFPAT_VENDOR: {
 396         struct ofp_action_vendor_header *avh
 397                 = (struct ofp_action_vendor_header *)ah;
 398         if (len < sizeof *avh) {
 399             ds_put_format(string, "***ofpat_vendor truncated***\n");
 400             return -1;
 401         }
 402         if (avh->vendor == htonl(NX_VENDOR_ID)) {
 403             ofp_print_nx_action(string, (struct nx_action_header *)avh);
 404         } else {
 405             ds_put_format(string, "vendor action:0x%x", ntohl(avh->vendor));
 406         }
 407         break;
 408     }
 409
 410     default:
 411         ds_put_format(string, "(decoder %"PRIu16" not implemented)", type);
 412         break;
 413     }
 414
 415     return len;
 416 }
 417
 418 void
 419 ofp_print_actions(struct ds *string, const struct ofp_action_header *action,
 420                   size_t actions_len)
 421 {
 422     uint8_t *p = (uint8_t *)action;
 423     int len = 0;
 424
 425     ds_put_cstr(string, "actions=");
 426     if (!actions_len) {
 427         ds_put_cstr(string, "drop");
 428     }
 429     while (actions_len > 0) {
 430         if (len) {
 431             ds_put_cstr(string, ",");
 432         }
 433         len = ofp_print_action(string, (struct ofp_action_header *)p,
 434                 actions_len);
 435         if (len < 0) {
 436             return;
 437         }
 438         p += len;
 439         actions_len -= len;
 440     }
 441 }
 442
 443 /* Pretty-print the OFPT_PACKET_OUT packet of 'len' bytes at 'oh' to 'string'
 444  * at the given 'verbosity' level. */
 445 static void ofp_packet_out(struct ds *string, const void *oh, size_t len,
 446                            int verbosity)
 447 {
 448     const struct ofp_packet_out *opo = oh;
 449     size_t actions_len = ntohs(opo->actions_len);
 450
 451     ds_put_cstr(string, " in_port=");
 452     ofp_print_port_name(string, ntohs(opo->in_port));
 453
 454     ds_put_format(string, " actions_len=%zu ", actions_len);
 455     if (actions_len > (ntohs(opo->header.length) - sizeof *opo)) {
 456         ds_put_format(string, "***packet too short for action length***\n");
 457         return;
 458     }
 459     ofp_print_actions(string, opo->actions, actions_len);
 460
 461     if (ntohl(opo->buffer_id) == UINT32_MAX) {
 462         int data_len = len - sizeof *opo - actions_len;
 463         ds_put_format(string, " data_len=%d", data_len);
 464         if (verbosity > 0 && len > sizeof *opo) {
 465             char *packet = ofp_packet_to_string(
 466                     (uint8_t *)opo->actions + actions_len, data_len, data_len);
 467             ds_put_char(string, '\n');
 468             ds_put_cstr(string, packet);
 469             free(packet);
 470         }
 471     } else {
 472         ds_put_format(string, " buffer=0x%08"PRIx32, ntohl(opo->buffer_id));
 473     }
 474     ds_put_char(string, '\n');
 475 }
 476
 477 /* qsort comparison function. */
 478 static int
 479 compare_ports(const void *a_, const void *b_)
 480 {
 481     const struct ofp_phy_port *a = a_;
 482     const struct ofp_phy_port *b = b_;
 483     uint16_t ap = ntohs(a->port_no);
 484     uint16_t bp = ntohs(b->port_no);
 485
 486     return ap < bp ? -1 : ap > bp;
 487 }
 488
 489 static void ofp_print_port_features(struct ds *string, uint32_t features)
 490 {
 491     if (features == 0) {
 492         ds_put_cstr(string, "Unsupported\n");
 493         return;
 494     }
 495     if (features & OFPPF_10MB_HD) {
 496         ds_put_cstr(string, "10MB-HD ");
 497     }
 498     if (features & OFPPF_10MB_FD) {
 499         ds_put_cstr(string, "10MB-FD ");
 500     }
 501     if (features & OFPPF_100MB_HD) {
 502         ds_put_cstr(string, "100MB-HD ");
 503     }
 504     if (features & OFPPF_100MB_FD) {
 505         ds_put_cstr(string, "100MB-FD ");
 506     }
 507     if (features & OFPPF_1GB_HD) {
 508         ds_put_cstr(string, "1GB-HD ");
 509     }
 510     if (features & OFPPF_1GB_FD) {
 511         ds_put_cstr(string, "1GB-FD ");
 512     }
 513     if (features & OFPPF_10GB_FD) {
 514         ds_put_cstr(string, "10GB-FD ");
 515     }
 516     if (features & OFPPF_COPPER) {
 517         ds_put_cstr(string, "COPPER ");
 518     }
 519     if (features & OFPPF_FIBER) {
 520         ds_put_cstr(string, "FIBER ");
 521     }
 522     if (features & OFPPF_AUTONEG) {
 523         ds_put_cstr(string, "AUTO_NEG ");
 524     }
 525     if (features & OFPPF_PAUSE) {
 526         ds_put_cstr(string, "AUTO_PAUSE ");
 527     }
 528     if (features & OFPPF_PAUSE_ASYM) {
 529         ds_put_cstr(string, "AUTO_PAUSE_ASYM ");
 530     }
 531     ds_put_char(string, '\n');
 532 }
 533
 534 static void
 535 ofp_print_phy_port(struct ds *string, const struct ofp_phy_port *port)
 536 {
 537     uint8_t name[OFP_MAX_PORT_NAME_LEN];
 538     int j;
 539
 540     memcpy(name, port->name, sizeof name);
 541     for (j = 0; j < sizeof name - 1; j++) {
 542         if (!isprint(name[j])) {
 543             break;
 544         }
 545     }
 546     name[j] = '\0';
 547
 548     ds_put_char(string, ' ');
 549     ofp_print_port_name(string, ntohs(port->port_no));
 550     ds_put_format(string, "(%s): addr:"ETH_ADDR_FMT", config: %#x, state:%#x\n",
 551             name, ETH_ADDR_ARGS(port->hw_addr), ntohl(port->config),
 552             ntohl(port->state));
 553     if (port->curr) {
 554         ds_put_format(string, "     current:    ");
 555         ofp_print_port_features(string, ntohl(port->curr));
 556     }
 557     if (port->advertised) {
 558         ds_put_format(string, "     advertised: ");
 559         ofp_print_port_features(string, ntohl(port->advertised));
 560     }
 561     if (port->supported) {
 562         ds_put_format(string, "     supported:  ");
 563         ofp_print_port_features(string, ntohl(port->supported));
 564     }
 565     if (port->peer) {
 566         ds_put_format(string, "     peer:       ");
 567         ofp_print_port_features(string, ntohl(port->peer));
 568     }
 569 }
 570
 571 /* Pretty-print the struct ofp_switch_features of 'len' bytes at 'oh' to
 572  * 'string' at the given 'verbosity' level. */
 573 static void
 574 ofp_print_switch_features(struct ds *string, const void *oh, size_t len,
 575                           int verbosity OVS_UNUSED)
 576 {
 577     const struct ofp_switch_features *osf = oh;
 578     struct ofp_phy_port *port_list;
 579     int n_ports;
 580     int i;
 581
 582     ds_put_format(string, " ver:0x%x, dpid:%016"PRIx64"\n",
 583             osf->header.version, ntohll(osf->datapath_id));
 584     ds_put_format(string, "n_tables:%d, n_buffers:%d\n", osf->n_tables,
 585             ntohl(osf->n_buffers));
 586     ds_put_format(string, "features: capabilities:%#x, actions:%#x\n",
 587            ntohl(osf->capabilities), ntohl(osf->actions));
 588
 589     if (ntohs(osf->header.length) >= sizeof *osf) {
 590         len = MIN(len, ntohs(osf->header.length));
 591     }
 592     n_ports = (len - sizeof *osf) / sizeof *osf->ports;
 593
 594     port_list = xmemdup(osf->ports, len - sizeof *osf);
 595     qsort(port_list, n_ports, sizeof *port_list, compare_ports);
 596     for (i = 0; i < n_ports; i++) {
 597         ofp_print_phy_port(string, &port_list[i]);
 598     }
 599     free(port_list);
 600 }
 601
 602 /* Pretty-print the struct ofp_switch_config of 'len' bytes at 'oh' to 'string'
 603  * at the given 'verbosity' level. */
 604 static void
 605 ofp_print_switch_config(struct ds *string, const void *oh,
 606                         size_t len OVS_UNUSED, int verbosity OVS_UNUSED)
 607 {
 608     const struct ofp_switch_config *osc = oh;
 609     uint16_t flags;
 610
 611     flags = ntohs(osc->flags);
 612     if (flags) {
 613         ds_put_format(string, " ***unknown flags 0x%04"PRIx16"***", flags);
 614     }
 615
 616     ds_put_format(string, " miss_send_len=%"PRIu16"\n", ntohs(osc->miss_send_len));
 617 }
 618
 619 static void print_wild(struct ds *string, const char *leader, int is_wild,
 620             int verbosity, const char *format, ...)
 621             __attribute__((format(printf, 5, 6)));
 622
 623 static void print_wild(struct ds *string, const char *leader, int is_wild,
 624                        int verbosity, const char *format, ...)
 625 {
 626     if (is_wild && verbosity < 2) {
 627         return;
 628     }
 629     ds_put_cstr(string, leader);
 630     if (!is_wild) {
 631         va_list args;
 632
 633         va_start(args, format);
 634         ds_put_format_valist(string, format, args);
 635         va_end(args);
 636     } else {
 637         ds_put_char(string, '*');
 638     }
 639     ds_put_char(string, ',');
 640 }
 641
 642 static void
 643 print_ip_netmask(struct ds *string, const char *leader, uint32_t ip,
 644                  uint32_t wild_bits, int verbosity)
 645 {
 646     if (wild_bits >= 32 && verbosity < 2) {
 647         return;
 648     }
 649     ds_put_cstr(string, leader);
 650     if (wild_bits < 32) {
 651         ds_put_format(string, IP_FMT, IP_ARGS(&ip));
 652         if (wild_bits) {
 653             ds_put_format(string, "/%d", 32 - wild_bits);
 654         }
 655     } else {
 656         ds_put_char(string, '*');
 657     }
 658     ds_put_char(string, ',');
 659 }
 660
 661 void
 662 ofp_print_match(struct ds *f, const struct ofp_match *om, int verbosity)
 663 {
 664     char *s = ofp_match_to_string(om, verbosity);
 665     ds_put_cstr(f, s);
 666     free(s);
 667 }
 668
 669 char *
 670 ofp_match_to_string(const struct ofp_match *om, int verbosity)
 671 {
 672     struct ds f = DS_EMPTY_INITIALIZER;
 673     uint32_t w = ntohl(om->wildcards);
 674     bool skip_type = false;
 675     bool skip_proto = false;
 676
 677     if (!(w & OFPFW_DL_TYPE)) {
 678         skip_type = true;
 679         if (om->dl_type == htons(ETH_TYPE_IP)) {
 680             if (!(w & OFPFW_NW_PROTO)) {
 681                 skip_proto = true;
 682                 if (om->nw_proto == IP_TYPE_ICMP) {
 683                     ds_put_cstr(&f, "icmp,");
 684                 } else if (om->nw_proto == IP_TYPE_TCP) {
 685                     ds_put_cstr(&f, "tcp,");
 686                 } else if (om->nw_proto == IP_TYPE_UDP) {
 687                     ds_put_cstr(&f, "udp,");
 688                 } else {
 689                     ds_put_cstr(&f, "ip,");
 690                     skip_proto = false;
 691                 }
 692             } else {
 693                 ds_put_cstr(&f, "ip,");
 694             }
 695         } else if (om->dl_type == htons(ETH_TYPE_ARP)) {
 696             ds_put_cstr(&f, "arp,");
 697         } else {
 698             skip_type = false;
 699         }
 700     }
 701     if (w & NXFW_TUN_ID) {
 702         ds_put_cstr(&f, "tun_id_wild,");
 703     }
 704     print_wild(&f, "in_port=", w & OFPFW_IN_PORT, verbosity,
 705                "%d", ntohs(om->in_port));
 706     print_wild(&f, "dl_vlan=", w & OFPFW_DL_VLAN, verbosity,
 707                "%d", ntohs(om->dl_vlan));
 708     print_wild(&f, "dl_vlan_pcp=", w & OFPFW_DL_VLAN_PCP, verbosity,
 709                "%d", om->dl_vlan_pcp);
 710     print_wild(&f, "dl_src=", w & OFPFW_DL_SRC, verbosity,
 711                ETH_ADDR_FMT, ETH_ADDR_ARGS(om->dl_src));
 712     print_wild(&f, "dl_dst=", w & OFPFW_DL_DST, verbosity,
 713                ETH_ADDR_FMT, ETH_ADDR_ARGS(om->dl_dst));
 714     if (!skip_type) {
 715         print_wild(&f, "dl_type=", w & OFPFW_DL_TYPE, verbosity,
 716                    "0x%04x", ntohs(om->dl_type));
 717     }
 718     print_ip_netmask(&f, "nw_src=", om->nw_src,
 719                      (w & OFPFW_NW_SRC_MASK) >> OFPFW_NW_SRC_SHIFT, verbosity);
 720     print_ip_netmask(&f, "nw_dst=", om->nw_dst,
 721                      (w & OFPFW_NW_DST_MASK) >> OFPFW_NW_DST_SHIFT, verbosity);
 722     if (!skip_proto) {
 723         if (om->dl_type == htons(ETH_TYPE_ARP)) {
 724             print_wild(&f, "opcode=", w & OFPFW_NW_PROTO, verbosity,
 725                        "%u", om->nw_proto);
 726         } else {
 727             print_wild(&f, "nw_proto=", w & OFPFW_NW_PROTO, verbosity,
 728                        "%u", om->nw_proto);
 729             print_wild(&f, "nw_tos=", w & OFPFW_NW_TOS, verbosity,
 730                        "%u", om->nw_tos);
 731         }
 732     }
 733     if (om->nw_proto == IP_TYPE_ICMP) {
 734         print_wild(&f, "icmp_type=", w & OFPFW_ICMP_TYPE, verbosity,
 735                    "%d", ntohs(om->icmp_type));
 736         print_wild(&f, "icmp_code=", w & OFPFW_ICMP_CODE, verbosity,
 737                    "%d", ntohs(om->icmp_code));
 738     } else {
 739         print_wild(&f, "tp_src=", w & OFPFW_TP_SRC, verbosity,
 740                    "%d", ntohs(om->tp_src));
 741         print_wild(&f, "tp_dst=", w & OFPFW_TP_DST, verbosity,
 742                    "%d", ntohs(om->tp_dst));
 743     }
 744     return ds_cstr(&f);
 745 }
 746
 747 /* Pretty-print the OFPT_FLOW_MOD packet of 'len' bytes at 'oh' to 'string'
 748  * at the given 'verbosity' level. */
 749 static void
 750 ofp_print_flow_mod(struct ds *string, const void *oh, size_t len,
 751                    int verbosity)
 752 {
 753     const struct ofp_flow_mod *ofm = oh;
 754
 755     ofp_print_match(string, &ofm->match, verbosity);
 756     switch (ntohs(ofm->command)) {
 757     case OFPFC_ADD:
 758         ds_put_cstr(string, " ADD: ");
 759         break;
 760     case OFPFC_MODIFY:
 761         ds_put_cstr(string, " MOD: ");
 762         break;
 763     case OFPFC_MODIFY_STRICT:
 764         ds_put_cstr(string, " MOD_STRICT: ");
 765         break;
 766     case OFPFC_DELETE:
 767         ds_put_cstr(string, " DEL: ");
 768         break;
 769     case OFPFC_DELETE_STRICT:
 770         ds_put_cstr(string, " DEL_STRICT: ");
 771         break;
 772     default:
 773         ds_put_format(string, " cmd:%d ", ntohs(ofm->command));
 774     }
 775     ds_put_format(string, "cookie:0x%"PRIx64" idle:%d hard:%d pri:%d "
 776             "buf:%#x flags:%"PRIx16" ", ntohll(ofm->cookie),
 777             ntohs(ofm->idle_timeout), ntohs(ofm->hard_timeout),
 778             ofm->match.wildcards ? ntohs(ofm->priority) : (uint16_t)-1,
 779             ntohl(ofm->buffer_id), ntohs(ofm->flags));
 780     ofp_print_actions(string, ofm->actions,
 781                       len - offsetof(struct ofp_flow_mod, actions));
 782     ds_put_char(string, '\n');
 783 }
 784
 785 /* Pretty-print the OFPT_FLOW_REMOVED packet of 'len' bytes at 'oh' to 'string'
 786  * at the given 'verbosity' level. */
 787 static void
 788 ofp_print_flow_removed(struct ds *string, const void *oh,
 789                        size_t len OVS_UNUSED, int verbosity)
 790 {
 791     const struct ofp_flow_removed *ofr = oh;
 792
 793     ofp_print_match(string, &ofr->match, verbosity);
 794     ds_put_cstr(string, " reason=");
 795     switch (ofr->reason) {
 796     case OFPRR_IDLE_TIMEOUT:
 797         ds_put_cstr(string, "idle");
 798         break;
 799     case OFPRR_HARD_TIMEOUT:
 800         ds_put_cstr(string, "hard");
 801         break;
 802     case OFPRR_DELETE:
 803         ds_put_cstr(string, "delete");
 804         break;
 805     default:
 806         ds_put_format(string, "**%"PRIu8"**", ofr->reason);
 807         break;
 808     }
 809     ds_put_format(string,
 810          " cookie0x%"PRIx64" pri%"PRIu16" secs%"PRIu32" nsecs%"PRIu32
 811          " idle%"PRIu16" pkts%"PRIu64" bytes%"PRIu64"\n",
 812          ntohll(ofr->cookie),
 813          ofr->match.wildcards ? ntohs(ofr->priority) : (uint16_t)-1,
 814          ntohl(ofr->duration_sec), ntohl(ofr->duration_nsec),
 815          ntohs(ofr->idle_timeout), ntohll(ofr->packet_count),
 816          ntohll(ofr->byte_count));
 817 }
 818
 819 static void
 820 ofp_print_port_mod(struct ds *string, const void *oh, size_t len OVS_UNUSED,
 821                    int verbosity OVS_UNUSED)
 822 {
 823     const struct ofp_port_mod *opm = oh;
 824
 825     ds_put_format(string, "port: %d: addr:"ETH_ADDR_FMT", config: %#x, mask:%#x\n",
 826             ntohs(opm->port_no), ETH_ADDR_ARGS(opm->hw_addr),
 827             ntohl(opm->config), ntohl(opm->mask));
 828     ds_put_format(string, "     advertise: ");
 829     if (opm->advertise) {
 830         ofp_print_port_features(string, ntohl(opm->advertise));
 831     } else {
 832         ds_put_format(string, "UNCHANGED\n");
 833     }
 834 }
 835
 836 struct error_type {
 837     int type;
 838     int code;
 839     const char *name;
 840 };
 841
 842 static const struct error_type error_types[] = {
 843 #define ERROR_TYPE(TYPE) {TYPE, -1, #TYPE}
 844 #define ERROR_CODE(TYPE, CODE) {TYPE, CODE, #CODE}
 845     ERROR_TYPE(OFPET_HELLO_FAILED),
 846     ERROR_CODE(OFPET_HELLO_FAILED, OFPHFC_INCOMPATIBLE),
 847     ERROR_CODE(OFPET_HELLO_FAILED, OFPHFC_EPERM),
 848
 849     ERROR_TYPE(OFPET_BAD_REQUEST),
 850     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BAD_VERSION),
 851     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE),
 852     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT),
 853     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR),
 854     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE),
 855     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_EPERM),
 856     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN),
 857     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BUFFER_EMPTY),
 858     ERROR_CODE(OFPET_BAD_REQUEST, OFPBRC_BUFFER_UNKNOWN),
 859
 860     ERROR_TYPE(OFPET_BAD_ACTION),
 861     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE),
 862     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_BAD_LEN),
 863     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR),
 864     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE),
 865     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT),
 866     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT),
 867     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_EPERM),
 868     ERROR_CODE(OFPET_BAD_ACTION, OFPBAC_TOO_MANY),
 869
 870     ERROR_TYPE(OFPET_FLOW_MOD_FAILED),
 871     ERROR_CODE(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL),
 872     ERROR_CODE(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP),
 873     ERROR_CODE(OFPET_FLOW_MOD_FAILED, OFPFMFC_EPERM),
 874     ERROR_CODE(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_EMERG_TIMEOUT),
 875     ERROR_CODE(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND),
 876
 877     ERROR_TYPE(OFPET_PORT_MOD_FAILED),
 878     ERROR_CODE(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT),
 879     ERROR_CODE(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR)
 880 };
 881 #define N_ERROR_TYPES ARRAY_SIZE(error_types)
 882
 883 static const char *
 884 lookup_error_type(int type)
 885 {
 886     const struct error_type *t;
 887
 888     for (t = error_types; t < &error_types[N_ERROR_TYPES]; t++) {
 889         if (t->type == type && t->code == -1) {
 890             return t->name;
 891         }
 892     }
 893     return "?";
 894 }
 895
 896 static const char *
 897 lookup_error_code(int type, int code)
 898 {
 899     const struct error_type *t;
 900
 901     for (t = error_types; t < &error_types[N_ERROR_TYPES]; t++) {
 902         if (t->type == type && t->code == code) {
 903             return t->name;
 904         }
 905     }
 906     return "?";
 907 }
 908
 909 /* Pretty-print the OFPT_ERROR packet of 'len' bytes at 'oh' to 'string'
 910  * at the given 'verbosity' level. */
 911 static void
 912 ofp_print_error_msg(struct ds *string, const void *oh, size_t len,
 913                        int verbosity OVS_UNUSED)
 914 {
 915     const struct ofp_error_msg *oem = oh;
 916     int type = ntohs(oem->type);
 917     int code = ntohs(oem->code);
 918     char *s;
 919
 920     ds_put_format(string, " type%d(%s) code%d(%s) payload:\n",
 921                   type, lookup_error_type(type),
 922                   code, lookup_error_code(type, code));
 923
 924     switch (type) {
 925     case OFPET_HELLO_FAILED:
 926         ds_put_printable(string, (char *) oem->data, len - sizeof *oem);
 927         break;
 928
 929     case OFPET_BAD_REQUEST:
 930         s = ofp_to_string(oem->data, len - sizeof *oem, 1);
 931         ds_put_cstr(string, s);
 932         free(s);
 933         break;
 934
 935     default:
 936         ds_put_hex_dump(string, oem->data, len - sizeof *oem, 0, true);
 937         break;
 938     }
 939 }
 940
 941 /* Pretty-print the OFPT_PORT_STATUS packet of 'len' bytes at 'oh' to 'string'
 942  * at the given 'verbosity' level. */
 943 static void
 944 ofp_print_port_status(struct ds *string, const void *oh, size_t len OVS_UNUSED,
 945                       int verbosity OVS_UNUSED)
 946 {
 947     const struct ofp_port_status *ops = oh;
 948
 949     if (ops->reason == OFPPR_ADD) {
 950         ds_put_format(string, " ADD:");
 951     } else if (ops->reason == OFPPR_DELETE) {
 952         ds_put_format(string, " DEL:");
 953     } else if (ops->reason == OFPPR_MODIFY) {
 954         ds_put_format(string, " MOD:");
 955     }
 956
 957     ofp_print_phy_port(string, &ops->desc);
 958 }
 959
 960 static void
 961 ofp_desc_stats_reply(struct ds *string, const void *body,
 962                      size_t len OVS_UNUSED, int verbosity OVS_UNUSED)
 963 {
 964     const struct ofp_desc_stats *ods = body;
 965
 966     ds_put_format(string, "Manufacturer: %.*s\n",
 967             (int) sizeof ods->mfr_desc, ods->mfr_desc);
 968     ds_put_format(string, "Hardware: %.*s\n",
 969             (int) sizeof ods->hw_desc, ods->hw_desc);
 970     ds_put_format(string, "Software: %.*s\n",
 971             (int) sizeof ods->sw_desc, ods->sw_desc);
 972     ds_put_format(string, "Serial Num: %.*s\n",
 973             (int) sizeof ods->serial_num, ods->serial_num);
 974     ds_put_format(string, "DP Description: %.*s\n",
 975             (int) sizeof ods->dp_desc, ods->dp_desc);
 976 }
 977
 978 static void
 979 ofp_flow_stats_request(struct ds *string, const void *oh,
 980                        size_t len OVS_UNUSED, int verbosity)
 981 {
 982     const struct ofp_flow_stats_request *fsr = oh;
 983
 984     if (fsr->table_id == 0xff) {
 985         ds_put_format(string, " table_id=any, ");
 986     } else {
 987         ds_put_format(string, " table_id=%"PRIu8", ", fsr->table_id);
 988     }
 989
 990     ofp_print_match(string, &fsr->match, verbosity);
 991 }
 992
 993 static void
 994 ofp_flow_stats_reply(struct ds *string, const void *body_, size_t len,
 995                      int verbosity)
 996 {
 997     const char *body = body_;
 998     const char *pos = body;
 999     for (;;) {
1000         const struct ofp_flow_stats *fs;
1001         ptrdiff_t bytes_left = body + len - pos;
1002         size_t length;
1003
1004         if (bytes_left < sizeof *fs) {
1005             if (bytes_left != 0) {
1006                 ds_put_format(string, " ***%td leftover bytes at end***",
1007                               bytes_left);
1008             }
1009             break;
1010         }
1011
1012         fs = (const void *) pos;
1013         length = ntohs(fs->length);
1014         if (length < sizeof *fs) {
1015             ds_put_format(string, " ***length=%zu shorter than minimum %zu***",
1016                           length, sizeof *fs);
1017             break;
1018         } else if (length > bytes_left) {
1019             ds_put_format(string,
1020                           " ***length=%zu but only %td bytes left***",
1021                           length, bytes_left);
1022             break;
1023         } else if ((length - sizeof *fs) % sizeof fs->actions[0]) {
1024             ds_put_format(string,
1025                           " ***length=%zu has %zu bytes leftover in "
1026                           "final action***",
1027                           length,
1028                           (length - sizeof *fs) % sizeof fs->actions[0]);
1029             break;
1030         }
1031
1032         ds_put_format(string, "  cookie=0x%"PRIx64", ", ntohll(fs->cookie));
1033         ds_put_format(string, "duration_sec=%"PRIu32"s, ",
1034                     ntohl(fs->duration_sec));
1035         ds_put_format(string, "duration_nsec=%"PRIu32"ns, ",
1036                     ntohl(fs->duration_nsec));
1037         ds_put_format(string, "table_id=%"PRIu8", ", fs->table_id);
1038         ds_put_format(string, "priority=%"PRIu16", ",
1039                     fs->match.wildcards ? ntohs(fs->priority) : (uint16_t)-1);
1040         ds_put_format(string, "n_packets=%"PRIu64", ",
1041                     ntohll(fs->packet_count));
1042         ds_put_format(string, "n_bytes=%"PRIu64", ", ntohll(fs->byte_count));
1043         if (fs->idle_timeout != htons(OFP_FLOW_PERMANENT)) {
1044             ds_put_format(string, "idle_timeout=%"PRIu16",",
1045                           ntohs(fs->idle_timeout));
1046         }
1047         if (fs->hard_timeout != htons(OFP_FLOW_PERMANENT)) {
1048             ds_put_format(string, "hard_timeout=%"PRIu16",",
1049                           ntohs(fs->hard_timeout));
1050         }
1051         ofp_print_match(string, &fs->match, verbosity);
1052         ofp_print_actions(string, fs->actions, length - sizeof *fs);
1053         ds_put_char(string, '\n');
1054
1055         pos += length;
1056      }
1057 }
1058
1059 static void
1060 ofp_aggregate_stats_request(struct ds *string, const void *oh,
1061                             size_t len OVS_UNUSED, int verbosity)
1062 {
1063     const struct ofp_aggregate_stats_request *asr = oh;
1064
1065     if (asr->table_id == 0xff) {
1066         ds_put_format(string, " table_id=any, ");
1067     } else {
1068         ds_put_format(string, " table_id=%"PRIu8", ", asr->table_id);
1069     }
1070
1071     ofp_print_match(string, &asr->match, verbosity);
1072 }
1073
1074 static void
1075 ofp_aggregate_stats_reply(struct ds *string, const void *body_,
1076                           size_t len OVS_UNUSED, int verbosity OVS_UNUSED)
1077 {
1078     const struct ofp_aggregate_stats_reply *asr = body_;
1079
1080     ds_put_format(string, " packet_count=%"PRIu64, ntohll(asr->packet_count));
1081     ds_put_format(string, " byte_count=%"PRIu64, ntohll(asr->byte_count));
1082     ds_put_format(string, " flow_count=%"PRIu32, ntohl(asr->flow_count));
1083 }
1084
1085 static void print_port_stat(struct ds *string, const char *leader,
1086                             uint64_t stat, int more)
1087 {
1088     ds_put_cstr(string, leader);
1089     if (stat != -1) {
1090         ds_put_format(string, "%"PRIu64, stat);
1091     } else {
1092         ds_put_char(string, '?');
1093     }
1094     if (more) {
1095         ds_put_cstr(string, ", ");
1096     } else {
1097         ds_put_cstr(string, "\n");
1098     }
1099 }
1100
1101 static void
1102 ofp_port_stats_request(struct ds *string, const void *body_,
1103                        size_t len OVS_UNUSED, int verbosity OVS_UNUSED)
1104 {
1105     const struct ofp_port_stats_request *psr = body_;
1106     ds_put_format(string, "port_no=%"PRIu16, ntohs(psr->port_no));
1107 }
1108
1109 static void
1110 ofp_port_stats_reply(struct ds *string, const void *body, size_t len,
1111                      int verbosity)
1112 {
1113     const struct ofp_port_stats *ps = body;
1114     size_t n = len / sizeof *ps;
1115     ds_put_format(string, " %zu ports\n", n);
1116     if (verbosity < 1) {
1117         return;
1118     }
1119
1120     for (; n--; ps++) {
1121         ds_put_format(string, "  port %2"PRIu16": ", ntohs(ps->port_no));
1122
1123         ds_put_cstr(string, "rx ");
1124         print_port_stat(string, "pkts=", ntohll(ps->rx_packets), 1);
1125         print_port_stat(string, "bytes=", ntohll(ps->rx_bytes), 1);
1126         print_port_stat(string, "drop=", ntohll(ps->rx_dropped), 1);
1127         print_port_stat(string, "errs=", ntohll(ps->rx_errors), 1);
1128         print_port_stat(string, "frame=", ntohll(ps->rx_frame_err), 1);
1129         print_port_stat(string, "over=", ntohll(ps->rx_over_err), 1);
1130         print_port_stat(string, "crc=", ntohll(ps->rx_crc_err), 0);
1131
1132         ds_put_cstr(string, "           tx ");
1133         print_port_stat(string, "pkts=", ntohll(ps->tx_packets), 1);
1134         print_port_stat(string, "bytes=", ntohll(ps->tx_bytes), 1);
1135         print_port_stat(string, "drop=", ntohll(ps->tx_dropped), 1);
1136         print_port_stat(string, "errs=", ntohll(ps->tx_errors), 1);
1137         print_port_stat(string, "coll=", ntohll(ps->collisions), 0);
1138     }
1139 }
1140
1141 static void
1142 ofp_table_stats_reply(struct ds *string, const void *body, size_t len,
1143                      int verbosity)
1144 {
1145     const struct ofp_table_stats *ts = body;
1146     size_t n = len / sizeof *ts;
1147     ds_put_format(string, " %zu tables\n", n);
1148     if (verbosity < 1) {
1149         return;
1150     }
1151
1152     for (; n--; ts++) {
1153         char name[OFP_MAX_TABLE_NAME_LEN + 1];
1154         strncpy(name, ts->name, sizeof name);
1155         name[OFP_MAX_TABLE_NAME_LEN] = '\0';
1156
1157         ds_put_format(string, "  %d: %-8s: ", ts->table_id, name);
1158         ds_put_format(string, "wild=0x%05"PRIx32", ", ntohl(ts->wildcards));
1159         ds_put_format(string, "max=%6"PRIu32", ", ntohl(ts->max_entries));
1160         ds_put_format(string, "active=%"PRIu32"\n", ntohl(ts->active_count));
1161         ds_put_cstr(string, "               ");
1162         ds_put_format(string, "lookup=%"PRIu64", ",
1163                     ntohll(ts->lookup_count));
1164         ds_put_format(string, "matched=%"PRIu64"\n",
1165                     ntohll(ts->matched_count));
1166      }
1167 }
1168
1169 static void
1170 ofp_print_queue_name(struct ds *string, uint32_t queue_id)
1171 {
1172     if (queue_id == OFPQ_ALL) {
1173         ds_put_cstr(string, "ALL");
1174     } else {
1175         ds_put_format(string, "%"PRIu32, queue_id);
1176     }
1177 }
1178
1179 static void
1180 ofp_queue_stats_request(struct ds *string, const void *body_,
1181                        size_t len OVS_UNUSED, int verbosity OVS_UNUSED)
1182 {
1183     const struct ofp_queue_stats_request *qsr = body_;
1184
1185     ds_put_cstr(string, "port=");
1186     ofp_print_port_name(string, ntohs(qsr->port_no));
1187
1188     ds_put_cstr(string, " queue=");
1189     ofp_print_queue_name(string, ntohl(qsr->queue_id));
1190 }
1191
1192 static void
1193 ofp_queue_stats_reply(struct ds *string, const void *body, size_t len,
1194                      int verbosity)
1195 {
1196     const struct ofp_queue_stats *qs = body;
1197     size_t n = len / sizeof *qs;
1198     ds_put_format(string, " %zu queues\n", n);
1199     if (verbosity < 1) {
1200         return;
1201     }
1202
1203     for (; n--; qs++) {
1204         ds_put_cstr(string, "  port ");
1205         ofp_print_port_name(string, ntohs(qs->port_no));
1206         ds_put_cstr(string, " queue ");
1207         ofp_print_queue_name(string, ntohl(qs->queue_id));
1208         ds_put_cstr(string, ": ");
1209
1210         print_port_stat(string, "bytes=", ntohll(qs->tx_bytes), 1);
1211         print_port_stat(string, "pkts=", ntohll(qs->tx_packets), 1);
1212         print_port_stat(string, "errors=", ntohll(qs->tx_errors), 0);
1213     }
1214 }
1215
1216 static void
1217 vendor_stat(struct ds *string, const void *body, size_t len,
1218             int verbosity OVS_UNUSED)
1219 {
1220     ds_put_format(string, " vendor=%08"PRIx32, ntohl(*(uint32_t *) body));
1221     ds_put_format(string, " %zu bytes additional data",
1222                   len - sizeof(uint32_t));
1223 }
1224
1225 enum stats_direction {
1226     REQUEST,
1227     REPLY
1228 };
1229
1230 static void
1231 print_stats(struct ds *string, int type, const void *body, size_t body_len,
1232             int verbosity, enum stats_direction direction)
1233 {
1234     struct stats_msg {
1235         size_t min_body, max_body;
1236         void (*printer)(struct ds *, const void *, size_t len, int verbosity);
1237     };
1238
1239     struct stats_type {
1240         int type;
1241         const char *name;
1242         struct stats_msg request;
1243         struct stats_msg reply;
1244     };
1245
1246     static const struct stats_type stats_types[] = {
1247         {
1248             OFPST_DESC,
1249             "description",
1250             { 0, 0, NULL },
1251             { 0, SIZE_MAX, ofp_desc_stats_reply },
1252         },
1253         {
1254             OFPST_FLOW,
1255             "flow",
1256             { sizeof(struct ofp_flow_stats_request),
1257               sizeof(struct ofp_flow_stats_request),
1258               ofp_flow_stats_request },
1259             { 0, SIZE_MAX, ofp_flow_stats_reply },
1260         },
1261         {
1262             OFPST_AGGREGATE,
1263             "aggregate",
1264             { sizeof(struct ofp_aggregate_stats_request),
1265               sizeof(struct ofp_aggregate_stats_request),
1266               ofp_aggregate_stats_request },
1267             { sizeof(struct ofp_aggregate_stats_reply),
1268               sizeof(struct ofp_aggregate_stats_reply),
1269               ofp_aggregate_stats_reply },
1270         },
1271         {
1272             OFPST_TABLE,
1273             "table",
1274             { 0, 0, NULL },
1275             { 0, SIZE_MAX, ofp_table_stats_reply },
1276         },
1277         {
1278             OFPST_PORT,
1279             "port",
1280             { sizeof(struct ofp_port_stats_request),
1281               sizeof(struct ofp_port_stats_request),
1282               ofp_port_stats_request },
1283             { 0, SIZE_MAX, ofp_port_stats_reply },
1284         },
1285         {
1286             OFPST_QUEUE,
1287             "queue",
1288             { sizeof(struct ofp_queue_stats_request),
1289               sizeof(struct ofp_queue_stats_request),
1290               ofp_queue_stats_request },
1291             { 0, SIZE_MAX, ofp_queue_stats_reply },
1292         },
1293         {
1294             OFPST_VENDOR,
1295             "vendor-specific",
1296             { sizeof(uint32_t), SIZE_MAX, vendor_stat },
1297             { sizeof(uint32_t), SIZE_MAX, vendor_stat },
1298         },
1299         {
1300             -1,
1301             "unknown",
1302             { 0, 0, NULL, },
1303             { 0, 0, NULL, },
1304         },
1305     };
1306
1307     const struct stats_type *s;
1308     const struct stats_msg *m;
1309
1310     if (type >= ARRAY_SIZE(stats_types) || !stats_types[type].name) {
1311         ds_put_format(string, " ***unknown type %d***", type);
1312         return;
1313     }
1314     for (s = stats_types; s->type >= 0; s++) {
1315         if (s->type == type) {
1316             break;
1317         }
1318     }
1319     ds_put_format(string, " type=%d(%s)\n", type, s->name);
1320
1321     m = direction == REQUEST ? &s->request : &s->reply;
1322     if (body_len < m->min_body || body_len > m->max_body) {
1323         ds_put_format(string, " ***body_len=%zu not in %zu...%zu***",
1324                       body_len, m->min_body, m->max_body);
1325         return;
1326     }
1327     if (m->printer) {
1328         m->printer(string, body, body_len, verbosity);
1329     }
1330 }
1331
1332 static void
1333 ofp_stats_request(struct ds *string, const void *oh, size_t len, int verbosity)
1334 {
1335     const struct ofp_stats_request *srq = oh;
1336
1337     if (srq->flags) {
1338         ds_put_format(string, " ***unknown flags 0x%04"PRIx16"***",
1339                       ntohs(srq->flags));
1340     }
1341
1342     print_stats(string, ntohs(srq->type), srq->body,
1343                 len - offsetof(struct ofp_stats_request, body),
1344                 verbosity, REQUEST);
1345 }
1346
1347 static void
1348 ofp_stats_reply(struct ds *string, const void *oh, size_t len, int verbosity)
1349 {
1350     const struct ofp_stats_reply *srp = oh;
1351
1352     ds_put_cstr(string, " flags=");
1353     if (!srp->flags) {
1354         ds_put_cstr(string, "none");
1355     } else {
1356         uint16_t flags = ntohs(srp->flags);
1357         if (flags & OFPSF_REPLY_MORE) {
1358             ds_put_cstr(string, "[more]");
1359             flags &= ~OFPSF_REPLY_MORE;
1360         }
1361         if (flags) {
1362             ds_put_format(string, "[***unknown flags 0x%04"PRIx16"***]", flags);
1363         }
1364     }
1365
1366     print_stats(string, ntohs(srp->type), srp->body,
1367                 len - offsetof(struct ofp_stats_reply, body),
1368                 verbosity, REPLY);
1369 }
1370
1371 static void
1372 ofp_echo(struct ds *string, const void *oh, size_t len, int verbosity)
1373 {
1374     const struct ofp_header *hdr = oh;
1375
1376     ds_put_format(string, " %zu bytes of payload\n", len - sizeof *hdr);
1377     if (verbosity > 1) {
1378         ds_put_hex_dump(string, hdr, len - sizeof *hdr, 0, true);
1379     }
1380 }
1381
1382 struct openflow_packet {
1383     uint8_t type;
1384     const char *name;
1385     size_t min_size;
1386     void (*printer)(struct ds *, const void *, size_t len, int verbosity);
1387 };
1388
1389 static const struct openflow_packet packets[] = {
1390     {
1391         OFPT_HELLO,
1392         "hello",
1393         sizeof (struct ofp_header),
1394         NULL,
1395     },
1396     {
1397         OFPT_FEATURES_REQUEST,
1398         "features_request",
1399         sizeof (struct ofp_header),
1400         NULL,
1401     },
1402     {
1403         OFPT_FEATURES_REPLY,
1404         "features_reply",
1405         sizeof (struct ofp_switch_features),
1406         ofp_print_switch_features,
1407     },
1408     {
1409         OFPT_GET_CONFIG_REQUEST,
1410         "get_config_request",
1411         sizeof (struct ofp_header),
1412         NULL,
1413     },
1414     {
1415         OFPT_GET_CONFIG_REPLY,
1416         "get_config_reply",
1417         sizeof (struct ofp_switch_config),
1418         ofp_print_switch_config,
1419     },
1420     {
1421         OFPT_SET_CONFIG,
1422         "set_config",
1423         sizeof (struct ofp_switch_config),
1424         ofp_print_switch_config,
1425     },
1426     {
1427         OFPT_PACKET_IN,
1428         "packet_in",
1429         offsetof(struct ofp_packet_in, data),
1430         ofp_packet_in,
1431     },
1432     {
1433         OFPT_PACKET_OUT,
1434         "packet_out",
1435         sizeof (struct ofp_packet_out),
1436         ofp_packet_out,
1437     },
1438     {
1439         OFPT_FLOW_MOD,
1440         "flow_mod",
1441         sizeof (struct ofp_flow_mod),
1442         ofp_print_flow_mod,
1443     },
1444     {
1445         OFPT_FLOW_REMOVED,
1446         "flow_removed",
1447         sizeof (struct ofp_flow_removed),
1448         ofp_print_flow_removed,
1449     },
1450     {
1451         OFPT_PORT_MOD,
1452         "port_mod",
1453         sizeof (struct ofp_port_mod),
1454         ofp_print_port_mod,
1455     },
1456     {
1457         OFPT_PORT_STATUS,
1458         "port_status",
1459         sizeof (struct ofp_port_status),
1460         ofp_print_port_status
1461     },
1462     {
1463         OFPT_ERROR,
1464         "error_msg",
1465         sizeof (struct ofp_error_msg),
1466         ofp_print_error_msg,
1467     },
1468     {
1469         OFPT_STATS_REQUEST,
1470         "stats_request",
1471         sizeof (struct ofp_stats_request),
1472         ofp_stats_request,
1473     },
1474     {
1475         OFPT_STATS_REPLY,
1476         "stats_reply",
1477         sizeof (struct ofp_stats_reply),
1478         ofp_stats_reply,
1479     },
1480     {
1481         OFPT_ECHO_REQUEST,
1482         "echo_request",
1483         sizeof (struct ofp_header),
1484         ofp_echo,
1485     },
1486     {
1487         OFPT_ECHO_REPLY,
1488         "echo_reply",
1489         sizeof (struct ofp_header),
1490         ofp_echo,
1491     },
1492     {
1493         OFPT_VENDOR,
1494         "vendor",
1495         sizeof (struct ofp_vendor_header),
1496         NULL,
1497     },
1498     {
1499         OFPT_BARRIER_REQUEST,
1500         "barrier_request",
1501         sizeof (struct ofp_header),
1502         NULL,
1503     },
1504     {
1505         OFPT_BARRIER_REPLY,
1506         "barrier_reply",
1507         sizeof (struct ofp_header),
1508         NULL,
1509     }
1510 };
1511
1512 /* Composes and returns a string representing the OpenFlow packet of 'len'
1513  * bytes at 'oh' at the given 'verbosity' level.  0 is a minimal amount of
1514  * verbosity and higher numbers increase verbosity.  The caller is responsible
1515  * for freeing the string. */
1516 char *
1517 ofp_to_string(const void *oh_, size_t len, int verbosity)
1518 {
1519     struct ds string = DS_EMPTY_INITIALIZER;
1520     const struct ofp_header *oh = oh_;
1521     const struct openflow_packet *pkt;
1522
1523     if (len < sizeof(struct ofp_header)) {
1524         ds_put_cstr(&string, "OpenFlow packet too short:\n");
1525         ds_put_hex_dump(&string, oh, len, 0, true);
1526         return ds_cstr(&string);
1527     } else if (oh->version != OFP_VERSION) {
1528         ds_put_format(&string, "Bad OpenFlow version %"PRIu8":\n", oh->version);
1529         ds_put_hex_dump(&string, oh, len, 0, true);
1530         return ds_cstr(&string);
1531     }
1532
1533     for (pkt = packets; ; pkt++) {
1534         if (pkt >= &packets[ARRAY_SIZE(packets)]) {
1535             ds_put_format(&string, "Unknown OpenFlow packet type %"PRIu8":\n",
1536                           oh->type);
1537             ds_put_hex_dump(&string, oh, len, 0, true);
1538             return ds_cstr(&string);
1539         } else if (oh->type == pkt->type) {
1540             break;
1541         }
1542     }
1543
1544     ds_put_format(&string, "%s (xid=0x%"PRIx32"):", pkt->name, oh->xid);
1545
1546     if (ntohs(oh->length) > len)
1547         ds_put_format(&string, " (***truncated to %zu bytes from %"PRIu16"***)",
1548                 len, ntohs(oh->length));
1549     else if (ntohs(oh->length) < len) {
1550         ds_put_format(&string, " (***only uses %"PRIu16" bytes out of %zu***)\n",
1551                 ntohs(oh->length), len);
1552         len = ntohs(oh->length);
1553     }
1554
1555     if (len < pkt->min_size) {
1556         ds_put_format(&string, " (***length=%zu < min_size=%zu***)\n",
1557                 len, pkt->min_size);
1558     } else if (!pkt->printer) {
1559         if (len > sizeof *oh) {
1560             ds_put_format(&string, " length=%"PRIu16" (decoder not implemented)\n",
1561                           ntohs(oh->length));
1562         }
1563     } else {
1564         pkt->printer(&string, oh, len, verbosity);
1565     }
1566     if (verbosity >= 3) {
1567         ds_put_hex_dump(&string, oh, len, 0, true);
1568     }
1569     if (string.string[string.length - 1] != '\n') {
1570         ds_put_char(&string, '\n');
1571     }
1572     return ds_cstr(&string);
1573 }
1574
1575 /* Returns the name for the specified OpenFlow message type as a string,
1576  * e.g. "OFPT_FEATURES_REPLY".  If no name is known, the string returned is a
1577  * hex number, e.g. "0x55".
1578  *
1579  * The caller must free the returned string when it is no longer needed. */
1580 char *
1581 ofp_message_type_to_string(uint8_t type)
1582 {
1583     struct ds s = DS_EMPTY_INITIALIZER;
1584     const struct openflow_packet *pkt;
1585     for (pkt = packets; ; pkt++) {
1586         if (pkt >= &packets[ARRAY_SIZE(packets)]) {
1587             ds_put_format(&s, "0x%02"PRIx8, type);
1588             break;
1589         } else if (type == pkt->type) {
1590             const char *p;
1591
1592             ds_put_cstr(&s, "OFPT_");
1593             for (p = pkt->name; *p; p++) {
1594                 ds_put_char(&s, toupper((unsigned char) *p));
1595             }
1596             break;
1597         }
1598     }
1599     return ds_cstr(&s);
1600 }
1601 \f
1602 static void
1603 print_and_free(FILE *stream, char *string)
1604 {
1605     fputs(string, stream);
1606     free(string);
1607 }
1608
1609 /* Pretty-print the OpenFlow packet of 'len' bytes at 'oh' to 'stream' at the
1610  * given 'verbosity' level.  0 is a minimal amount of verbosity and higher
1611  * numbers increase verbosity. */
1612 void
1613 ofp_print(FILE *stream, const void *oh, size_t len, int verbosity)
1614 {
1615     print_and_free(stream, ofp_to_string(oh, len, verbosity));
1616 }
1617
1618 /* Dumps the contents of the Ethernet frame in the 'len' bytes starting at
1619  * 'data' to 'stream' using tcpdump.  'total_len' specifies the full length of
1620  * the Ethernet frame (of which 'len' bytes were captured).
1621  *
1622  * This starts and kills a tcpdump subprocess so it's quite expensive. */
1623 void
1624 ofp_print_packet(FILE *stream, const void *data, size_t len, size_t total_len)
1625 {
1626     print_and_free(stream, ofp_packet_to_string(data, len, total_len));
1627 }