lib/ofp-parse.c

   1 /*
   2  * Copyright (c) 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
  19 #include "ofp-parse.h"
  20
  21 #include <ctype.h>
  22 #include <errno.h>
  23 #include <stdlib.h>
  24
  25 #include "autopath.h"
  26 #include "bundle.h"
  27 #include "byte-order.h"
  28 #include "dynamic-string.h"
  29 #include "learn.h"
  30 #include "meta-flow.h"
  31 #include "netdev.h"
  32 #include "multipath.h"
  33 #include "nx-match.h"
  34 #include "ofp-util.h"
  35 #include "ofpbuf.h"
  36 #include "openflow/openflow.h"
  37 #include "packets.h"
  38 #include "socket-util.h"
  39 #include "vconn.h"
  40 #include "vlog.h"
  41
  42 VLOG_DEFINE_THIS_MODULE(ofp_parse);
  43
  44 static uint32_t
  45 str_to_u32(const char *str)
  46 {
  47     char *tail;
  48     uint32_t value;
  49
  50     if (!str[0]) {
  51         ovs_fatal(0, "missing required numeric argument");
  52     }
  53
  54     errno = 0;
  55     value = strtoul(str, &tail, 0);
  56     if (errno == EINVAL || errno == ERANGE || *tail) {
  57         ovs_fatal(0, "invalid numeric format %s", str);
  58     }
  59     return value;
  60 }
  61
  62 static uint64_t
  63 str_to_u64(const char *str)
  64 {
  65     char *tail;
  66     uint64_t value;
  67
  68     if (!str[0]) {
  69         ovs_fatal(0, "missing required numeric argument");
  70     }
  71
  72     errno = 0;
  73     value = strtoull(str, &tail, 0);
  74     if (errno == EINVAL || errno == ERANGE || *tail) {
  75         ovs_fatal(0, "invalid numeric format %s", str);
  76     }
  77     return value;
  78 }
  79
  80 static void
  81 str_to_mac(const char *str, uint8_t mac[6])
  82 {
  83     if (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
  84         != ETH_ADDR_SCAN_COUNT) {
  85         ovs_fatal(0, "invalid mac address %s", str);
  86     }
  87 }
  88
  89 static void
  90 str_to_ip(const char *str, ovs_be32 *ip)
  91 {
  92     struct in_addr in_addr;
  93
  94     if (lookup_ip(str, &in_addr)) {
  95         ovs_fatal(0, "%s: could not convert to IP address", str);
  96     }
  97     *ip = in_addr.s_addr;
  98 }
  99
 100 static struct ofp_action_output *
 101 put_output_action(struct ofpbuf *b, uint16_t port)
 102 {
 103     struct ofp_action_output *oao;
 104
 105     oao = ofputil_put_OFPAT_OUTPUT(b);
 106     oao->port = htons(port);
 107     return oao;
 108 }
 109
 110 static void
 111 parse_enqueue(struct ofpbuf *b, char *arg)
 112 {
 113     char *sp = NULL;
 114     char *port = strtok_r(arg, ":q", &sp);
 115     char *queue = strtok_r(NULL, "", &sp);
 116     struct ofp_action_enqueue *oae;
 117
 118     if (port == NULL || queue == NULL) {
 119         ovs_fatal(0, "\"enqueue\" syntax is \"enqueue:PORT:QUEUE\"");
 120     }
 121
 122     oae = ofputil_put_OFPAT_ENQUEUE(b);
 123     oae->port = htons(str_to_u32(port));
 124     oae->queue_id = htonl(str_to_u32(queue));
 125 }
 126
 127 static void
 128 parse_output(struct ofpbuf *b, char *arg)
 129 {
 130     if (strchr(arg, '[')) {
 131         struct nx_action_output_reg *naor;
 132         int ofs, n_bits;
 133         uint32_t src;
 134
 135         nxm_parse_field_bits(arg, &src, &ofs, &n_bits);
 136
 137         naor = ofputil_put_NXAST_OUTPUT_REG(b);
 138         naor->ofs_nbits = nxm_encode_ofs_nbits(ofs, n_bits);
 139         naor->src = htonl(src);
 140         naor->max_len = htons(UINT16_MAX);
 141     } else {
 142         put_output_action(b, str_to_u32(arg));
 143     }
 144 }
 145
 146 static void
 147 parse_resubmit(struct ofpbuf *b, char *arg)
 148 {
 149     struct nx_action_resubmit *nar;
 150     char *in_port_s, *table_s;
 151     uint16_t in_port;
 152     uint8_t table;
 153
 154     in_port_s = strsep(&arg, ",");
 155     if (in_port_s && in_port_s[0]) {
 156         if (!ofputil_port_from_string(in_port_s, &in_port)) {
 157             in_port = str_to_u32(in_port_s);
 158         }
 159     } else {
 160         in_port = OFPP_IN_PORT;
 161     }
 162
 163     table_s = strsep(&arg, ",");
 164     table = table_s && table_s[0] ? str_to_u32(table_s) : 255;
 165
 166     if (in_port == OFPP_IN_PORT && table == 255) {
 167         ovs_fatal(0, "at least one \"in_port\" or \"table\" must be specified "
 168                   " on resubmit");
 169     }
 170
 171     if (in_port != OFPP_IN_PORT && table == 255) {
 172         nar = ofputil_put_NXAST_RESUBMIT(b);
 173     } else {
 174         nar = ofputil_put_NXAST_RESUBMIT_TABLE(b);
 175         nar->table = table;
 176     }
 177     nar->in_port = htons(in_port);
 178 }
 179
 180 static void
 181 parse_set_tunnel(struct ofpbuf *b, const char *arg)
 182 {
 183     uint64_t tun_id = str_to_u64(arg);
 184     if (tun_id > UINT32_MAX) {
 185         ofputil_put_NXAST_SET_TUNNEL64(b)->tun_id = htonll(tun_id);
 186     } else {
 187         ofputil_put_NXAST_SET_TUNNEL(b)->tun_id = htonl(tun_id);
 188     }
 189 }
 190
 191 static void
 192 parse_note(struct ofpbuf *b, const char *arg)
 193 {
 194     size_t start_ofs = b->size;
 195     struct nx_action_note *nan;
 196     int remainder;
 197     size_t len;
 198
 199     nan = ofputil_put_NXAST_NOTE(b);
 200
 201     b->size -= sizeof nan->note;
 202     while (*arg != '\0') {
 203         uint8_t byte;
 204         bool ok;
 205
 206         if (*arg == '.') {
 207             arg++;
 208         }
 209         if (*arg == '\0') {
 210             break;
 211         }
 212
 213         byte = hexits_value(arg, 2, &ok);
 214         if (!ok) {
 215             ovs_fatal(0, "bad hex digit in `note' argument");
 216         }
 217         ofpbuf_put(b, &byte, 1);
 218
 219         arg += 2;
 220     }
 221
 222     len = b->size - start_ofs;
 223     remainder = len % OFP_ACTION_ALIGN;
 224     if (remainder) {
 225         ofpbuf_put_zeros(b, OFP_ACTION_ALIGN - remainder);
 226     }
 227     nan = (struct nx_action_note *)((char *)b->data + start_ofs);
 228     nan->len = htons(b->size - start_ofs);
 229 }
 230
 231 static void
 232 parse_named_action(enum ofputil_action_code code, const struct flow *flow,
 233                    struct ofpbuf *b, char *arg)
 234 {
 235     struct ofp_action_dl_addr *oada;
 236     struct ofp_action_vlan_pcp *oavp;
 237     struct ofp_action_vlan_vid *oavv;
 238     struct ofp_action_nw_addr *oana;
 239     struct ofp_action_tp_port *oata;
 240
 241     switch (code) {
 242     case OFPUTIL_OFPAT_OUTPUT:
 243         parse_output(b, arg);
 244         break;
 245
 246     case OFPUTIL_OFPAT_SET_VLAN_VID:
 247         oavv = ofputil_put_OFPAT_SET_VLAN_VID(b);
 248         oavv->vlan_vid = htons(str_to_u32(arg));
 249         break;
 250
 251     case OFPUTIL_OFPAT_SET_VLAN_PCP:
 252         oavp = ofputil_put_OFPAT_SET_VLAN_PCP(b);
 253         oavp->vlan_pcp = str_to_u32(arg);
 254         break;
 255
 256     case OFPUTIL_OFPAT_STRIP_VLAN:
 257         ofputil_put_OFPAT_STRIP_VLAN(b);
 258         break;
 259
 260     case OFPUTIL_OFPAT_SET_DL_SRC:
 261     case OFPUTIL_OFPAT_SET_DL_DST:
 262         oada = ofputil_put_action(code, b);
 263         str_to_mac(arg, oada->dl_addr);
 264         break;
 265
 266     case OFPUTIL_OFPAT_SET_NW_SRC:
 267     case OFPUTIL_OFPAT_SET_NW_DST:
 268         oana = ofputil_put_action(code, b);
 269         str_to_ip(arg, &oana->nw_addr);
 270         break;
 271
 272     case OFPUTIL_OFPAT_SET_NW_TOS:
 273         ofputil_put_OFPAT_SET_NW_TOS(b)->nw_tos = str_to_u32(arg);
 274         break;
 275
 276     case OFPUTIL_OFPAT_SET_TP_SRC:
 277     case OFPUTIL_OFPAT_SET_TP_DST:
 278         oata = ofputil_put_action(code, b);
 279         oata->tp_port = htons(str_to_u32(arg));
 280         break;
 281
 282     case OFPUTIL_OFPAT_ENQUEUE:
 283         parse_enqueue(b, arg);
 284         break;
 285
 286     case OFPUTIL_NXAST_RESUBMIT:
 287         parse_resubmit(b, arg);
 288         break;
 289
 290     case OFPUTIL_NXAST_SET_TUNNEL:
 291         parse_set_tunnel(b, arg);
 292         break;
 293
 294     case OFPUTIL_NXAST_SET_QUEUE:
 295         ofputil_put_NXAST_SET_QUEUE(b)->queue_id = htonl(str_to_u32(arg));
 296         break;
 297
 298     case OFPUTIL_NXAST_POP_QUEUE:
 299         ofputil_put_NXAST_POP_QUEUE(b);
 300         break;
 301
 302     case OFPUTIL_NXAST_REG_MOVE:
 303         nxm_parse_reg_move(ofputil_put_NXAST_REG_MOVE(b), arg);
 304         break;
 305
 306     case OFPUTIL_NXAST_REG_LOAD:
 307         nxm_parse_reg_load(ofputil_put_NXAST_REG_LOAD(b), arg);
 308         break;
 309
 310     case OFPUTIL_NXAST_NOTE:
 311         parse_note(b, arg);
 312         break;
 313
 314     case OFPUTIL_NXAST_SET_TUNNEL64:
 315         ofputil_put_NXAST_SET_TUNNEL64(b)->tun_id = htonll(str_to_u64(arg));
 316         break;
 317
 318     case OFPUTIL_NXAST_MULTIPATH:
 319         multipath_parse(ofputil_put_NXAST_MULTIPATH(b), arg);
 320         break;
 321
 322     case OFPUTIL_NXAST_AUTOPATH:
 323         autopath_parse(ofputil_put_NXAST_AUTOPATH(b), arg);
 324         break;
 325
 326     case OFPUTIL_NXAST_BUNDLE:
 327         bundle_parse(b, arg);
 328         break;
 329
 330     case OFPUTIL_NXAST_BUNDLE_LOAD:
 331         bundle_parse_load(b, arg);
 332         break;
 333
 334     case OFPUTIL_NXAST_RESUBMIT_TABLE:
 335     case OFPUTIL_NXAST_OUTPUT_REG:
 336         NOT_REACHED();
 337
 338     case OFPUTIL_NXAST_LEARN:
 339         learn_parse(b, arg, flow);
 340         break;
 341     }
 342 }
 343
 344 static void
 345 str_to_action(const struct flow *flow, char *str, struct ofpbuf *b)
 346 {
 347     char *pos, *act, *arg;
 348     int n_actions;
 349
 350     pos = str;
 351     n_actions = 0;
 352     while (ofputil_parse_key_value(&pos, &act, &arg)) {
 353         uint16_t port;
 354         int code;
 355
 356         code = ofputil_action_code_from_name(act);
 357         if (code >= 0) {
 358             parse_named_action(code, flow, b, arg);
 359         } else if (!strcasecmp(act, "drop")) {
 360             /* A drop action in OpenFlow occurs by just not setting
 361              * an action. */
 362             if (n_actions) {
 363                 ovs_fatal(0, "Drop actions must not be preceded by other "
 364                           "actions");
 365             } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
 366                 ovs_fatal(0, "Drop actions must not be followed by other "
 367                           "actions");
 368             }
 369             break;
 370         } else if (!strcasecmp(act, "CONTROLLER")) {
 371             struct ofp_action_output *oao;
 372             oao = put_output_action(b, OFPP_CONTROLLER);
 373
 374             /* Unless a numeric argument is specified, we send the whole
 375              * packet to the controller. */
 376             if (arg[0] && (strspn(arg, "0123456789") == strlen(arg))) {
 377                oao->max_len = htons(str_to_u32(arg));
 378             } else {
 379                 oao->max_len = htons(UINT16_MAX);
 380             }
 381         } else if (ofputil_port_from_string(act, &port)) {
 382             put_output_action(b, port);
 383         } else {
 384             ovs_fatal(0, "Unknown action: %s", act);
 385         }
 386         n_actions++;
 387     }
 388 }
 389
 390 struct protocol {
 391     const char *name;
 392     uint16_t dl_type;
 393     uint8_t nw_proto;
 394 };
 395
 396 static bool
 397 parse_protocol(const char *name, const struct protocol **p_out)
 398 {
 399     static const struct protocol protocols[] = {
 400         { "ip", ETH_TYPE_IP, 0 },
 401         { "arp", ETH_TYPE_ARP, 0 },
 402         { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
 403         { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
 404         { "udp", ETH_TYPE_IP, IPPROTO_UDP },
 405         { "ipv6", ETH_TYPE_IPV6, 0 },
 406         { "ip6", ETH_TYPE_IPV6, 0 },
 407         { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
 408         { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
 409         { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
 410     };
 411     const struct protocol *p;
 412
 413     for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
 414         if (!strcmp(p->name, name)) {
 415             *p_out = p;
 416             return true;
 417         }
 418     }
 419     *p_out = NULL;
 420     return false;
 421 }
 422
 423 static void
 424 ofp_fatal(const char *flow, bool verbose, const char *format, ...)
 425 {
 426     va_list args;
 427
 428     if (verbose) {
 429         fprintf(stderr, "%s:\n", flow);
 430     }
 431
 432     va_start(args, format);
 433     ovs_fatal_valist(0, format, args);
 434 }
 435
 436 static void
 437 parse_field(const struct mf_field *mf, const char *s, struct cls_rule *rule)
 438 {
 439     union mf_value value, mask;
 440     char *error;
 441
 442     error = mf_parse(mf, s, &value, &mask);
 443     if (error) {
 444         ovs_fatal(0, "%s", error);
 445     }
 446
 447     mf_set(mf, &value, &mask, rule);
 448 }
 449
 450 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
 451  * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
 452  * If 'actions' is specified, an action must be in 'string' and may be expanded
 453  * or reallocated.
 454  *
 455  * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
 456  * constant for 'command'.  To parse syntax for an OFPST_FLOW or
 457  * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'. */
 458 void
 459 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
 460               bool verbose)
 461 {
 462     enum {
 463         F_OUT_PORT = 1 << 0,
 464         F_ACTIONS = 1 << 1,
 465         F_COOKIE = 1 << 2,
 466         F_TIMEOUT = 1 << 3,
 467         F_PRIORITY = 1 << 4
 468     } fields;
 469     char *string = xstrdup(str_);
 470     char *save_ptr = NULL;
 471     char *act_str = NULL;
 472     char *name;
 473
 474     switch (command) {
 475     case -1:
 476         fields = F_OUT_PORT;
 477         break;
 478
 479     case OFPFC_ADD:
 480         fields = F_ACTIONS | F_COOKIE | F_TIMEOUT | F_PRIORITY;
 481         break;
 482
 483     case OFPFC_DELETE:
 484         fields = F_OUT_PORT;
 485         break;
 486
 487     case OFPFC_DELETE_STRICT:
 488         fields = F_OUT_PORT | F_PRIORITY;
 489         break;
 490
 491     case OFPFC_MODIFY:
 492         fields = F_ACTIONS | F_COOKIE;
 493         break;
 494
 495     case OFPFC_MODIFY_STRICT:
 496         fields = F_ACTIONS | F_COOKIE | F_PRIORITY;
 497         break;
 498
 499     default:
 500         NOT_REACHED();
 501     }
 502
 503     cls_rule_init_catchall(&fm->cr, OFP_DEFAULT_PRIORITY);
 504     fm->cookie = htonll(0);
 505     fm->table_id = 0xff;
 506     fm->command = command;
 507     fm->idle_timeout = OFP_FLOW_PERMANENT;
 508     fm->hard_timeout = OFP_FLOW_PERMANENT;
 509     fm->buffer_id = UINT32_MAX;
 510     fm->out_port = OFPP_NONE;
 511     fm->flags = 0;
 512     if (fields & F_ACTIONS) {
 513         act_str = strstr(string, "action");
 514         if (!act_str) {
 515             ofp_fatal(str_, verbose, "must specify an action");
 516         }
 517         *act_str = '\0';
 518
 519         act_str = strchr(act_str + 1, '=');
 520         if (!act_str) {
 521             ofp_fatal(str_, verbose, "must specify an action");
 522         }
 523
 524         act_str++;
 525     }
 526     for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
 527          name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
 528         const struct protocol *p;
 529
 530         if (parse_protocol(name, &p)) {
 531             cls_rule_set_dl_type(&fm->cr, htons(p->dl_type));
 532             if (p->nw_proto) {
 533                 cls_rule_set_nw_proto(&fm->cr, p->nw_proto);
 534             }
 535         } else {
 536             char *value;
 537
 538             value = strtok_r(NULL, ", \t\r\n", &save_ptr);
 539             if (!value) {
 540                 ofp_fatal(str_, verbose, "field %s missing value", name);
 541             }
 542
 543             if (!strcmp(name, "table")) {
 544                 fm->table_id = atoi(value);
 545             } else if (!strcmp(name, "out_port")) {
 546                 fm->out_port = atoi(value);
 547             } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
 548                 fm->cr.priority = atoi(value);
 549             } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
 550                 fm->idle_timeout = atoi(value);
 551             } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
 552                 fm->hard_timeout = atoi(value);
 553             } else if (fields & F_COOKIE && !strcmp(name, "cookie")) {
 554                 fm->cookie = htonll(str_to_u64(value));
 555             } else if (mf_from_name(name)) {
 556                 parse_field(mf_from_name(name), value, &fm->cr);
 557             } else if (!strcmp(name, "duration")
 558                        || !strcmp(name, "n_packets")
 559                        || !strcmp(name, "n_bytes")) {
 560                 /* Ignore these, so that users can feed the output of
 561                  * "ovs-ofctl dump-flows" back into commands that parse
 562                  * flows. */
 563             } else {
 564                 ofp_fatal(str_, verbose, "unknown keyword %s", name);
 565             }
 566         }
 567     }
 568     if (fields & F_ACTIONS) {
 569         struct ofpbuf actions;
 570
 571         ofpbuf_init(&actions, sizeof(union ofp_action));
 572         str_to_action(&fm->cr.flow, act_str, &actions);
 573         fm->actions = ofpbuf_steal_data(&actions);
 574         fm->n_actions = actions.size / sizeof(union ofp_action);
 575     } else {
 576         fm->actions = NULL;
 577         fm->n_actions = 0;
 578     }
 579
 580     free(string);
 581 }
 582
 583 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
 584  * (one of OFPFC_*) and appends the parsed OpenFlow message to 'packets'.
 585  * '*cur_format' should initially contain the flow format currently configured
 586  * on the connection; this function will add a message to change the flow
 587  * format and update '*cur_format', if this is necessary to add the parsed
 588  * flow. */
 589 void
 590 parse_ofp_flow_mod_str(struct list *packets, enum nx_flow_format *cur_format,
 591                        bool *flow_mod_table_id, char *string, uint16_t command,
 592                        bool verbose)
 593 {
 594     enum nx_flow_format min_format, next_format;
 595     struct cls_rule rule_copy;
 596     struct ofpbuf *ofm;
 597     struct ofputil_flow_mod fm;
 598
 599     parse_ofp_str(&fm, command, string, verbose);
 600
 601     min_format = ofputil_min_flow_format(&fm.cr);
 602     next_format = MAX(*cur_format, min_format);
 603     if (next_format != *cur_format) {
 604         struct ofpbuf *sff = ofputil_make_set_flow_format(next_format);
 605         list_push_back(packets, &sff->list_node);
 606         *cur_format = next_format;
 607     }
 608
 609     /* Normalize a copy of the rule.  This ensures that non-normalized flows
 610      * get logged but doesn't affect what gets sent to the switch, so that the
 611      * switch can do whatever it likes with the flow. */
 612     rule_copy = fm.cr;
 613     ofputil_normalize_rule(&rule_copy, next_format);
 614
 615     if (fm.table_id != 0xff && !*flow_mod_table_id) {
 616         struct ofpbuf *sff = ofputil_make_flow_mod_table_id(true);
 617         list_push_back(packets, &sff->list_node);
 618         *flow_mod_table_id = true;
 619     }
 620
 621     ofm = ofputil_encode_flow_mod(&fm, *cur_format, *flow_mod_table_id);
 622     list_push_back(packets, &ofm->list_node);
 623 }
 624
 625 /* Similar to parse_ofp_flow_mod_str(), except that the string is read from
 626  * 'stream' and the command is always OFPFC_ADD.  Returns false if end-of-file
 627  * is reached before reading a flow, otherwise true. */
 628 bool
 629 parse_ofp_flow_mod_file(struct list *packets,
 630                         enum nx_flow_format *cur, bool *flow_mod_table_id,
 631                         FILE *stream, uint16_t command)
 632 {
 633     struct ds s;
 634     bool ok;
 635
 636     ds_init(&s);
 637     ok = ds_get_preprocessed_line(&s, stream) == 0;
 638     if (ok) {
 639         parse_ofp_flow_mod_str(packets, cur, flow_mod_table_id,
 640                                ds_cstr(&s), command, true);
 641     }
 642     ds_destroy(&s);
 643
 644     return ok;
 645 }
 646
 647 void
 648 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
 649                                  bool aggregate, char *string)
 650 {
 651     struct ofputil_flow_mod fm;
 652
 653     parse_ofp_str(&fm, -1, string, false);
 654     fsr->aggregate = aggregate;
 655     fsr->match = fm.cr;
 656     fsr->out_port = fm.out_port;
 657     fsr->table_id = fm.table_id;
 658 }