package/network/config/swconfig/src/swlib.c

   1 /*
   2  * swlib.c: Switch configuration API (user space part)
   3  *
   4  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * version 2.1 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <stdlib.h>
  19 #include <inttypes.h>
  20 #include <errno.h>
  21 #include <stdint.h>
  22 #include <getopt.h>
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <linux/switch.h>
  26 #include "swlib.h"
  27 #include <netlink/netlink.h>
  28 #include <netlink/genl/genl.h>
  29 #include <netlink/genl/family.h>
  30
  31 //#define DEBUG 1
  32 #ifdef DEBUG
  33 #define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
  34 #else
  35 #define DPRINTF(fmt, ...) do {} while (0)
  36 #endif
  37
  38 static struct nl_sock *handle;
  39 static struct nl_cache *cache;
  40 static struct genl_family *family;
  41 static struct nlattr *tb[SWITCH_ATTR_MAX + 1];
  42 static int refcount = 0;
  43
  44 static struct nla_policy port_policy[SWITCH_ATTR_MAX] = {
  45         [SWITCH_PORT_ID] = { .type = NLA_U32 },
  46         [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
  47 };
  48
  49 static struct nla_policy portmap_policy[SWITCH_PORTMAP_MAX] = {
  50         [SWITCH_PORTMAP_SEGMENT] = { .type = NLA_STRING },
  51         [SWITCH_PORTMAP_VIRT] = { .type = NLA_U32 },
  52 };
  53
  54 static inline void *
  55 swlib_alloc(size_t size)
  56 {
  57         void *ptr;
  58
  59         ptr = malloc(size);
  60         if (!ptr)
  61                 goto done;
  62         memset(ptr, 0, size);
  63
  64 done:
  65         return ptr;
  66 }
  67
  68 static int
  69 wait_handler(struct nl_msg *msg, void *arg)
  70 {
  71         int *finished = arg;
  72
  73         *finished = 1;
  74         return NL_STOP;
  75 }
  76
  77 /* helper function for performing netlink requests */
  78 static int
  79 swlib_call(int cmd, int (*call)(struct nl_msg *, void *),
  80                 int (*data)(struct nl_msg *, void *), void *arg)
  81 {
  82         struct nl_msg *msg;
  83         struct nl_cb *cb = NULL;
  84         int finished;
  85         int flags = 0;
  86         int err;
  87
  88         msg = nlmsg_alloc();
  89         if (!msg) {
  90                 fprintf(stderr, "Out of memory!\n");
  91                 exit(1);
  92         }
  93
  94         if (!data)
  95                 flags |= NLM_F_DUMP;
  96
  97         genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, genl_family_get_id(family), 0, flags, cmd, 0);
  98         if (data) {
  99                 if (data(msg, arg) < 0)
 100                         goto nla_put_failure;
 101         }
 102
 103         cb = nl_cb_alloc(NL_CB_CUSTOM);
 104         if (!cb) {
 105                 fprintf(stderr, "nl_cb_alloc failed.\n");
 106                 exit(1);
 107         }
 108
 109         err = nl_send_auto_complete(handle, msg);
 110         if (err < 0) {
 111                 fprintf(stderr, "nl_send_auto_complete failed: %d\n", err);
 112                 goto out;
 113         }
 114
 115         finished = 0;
 116
 117         if (call)
 118                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, call, arg);
 119
 120         if (data)
 121                 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished);
 122         else
 123                 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished);
 124
 125         err = nl_recvmsgs(handle, cb);
 126         if (err < 0) {
 127                 goto out;
 128         }
 129
 130         if (!finished)
 131                 err = nl_wait_for_ack(handle);
 132
 133 out:
 134         if (cb)
 135                 nl_cb_put(cb);
 136 nla_put_failure:
 137         nlmsg_free(msg);
 138         return err;
 139 }
 140
 141 static int
 142 send_attr(struct nl_msg *msg, void *arg)
 143 {
 144         struct switch_val *val = arg;
 145         struct switch_attr *attr = val->attr;
 146
 147         NLA_PUT_U32(msg, SWITCH_ATTR_ID, attr->dev->id);
 148         NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, attr->id);
 149         switch(attr->atype) {
 150         case SWLIB_ATTR_GROUP_PORT:
 151                 NLA_PUT_U32(msg, SWITCH_ATTR_OP_PORT, val->port_vlan);
 152                 break;
 153         case SWLIB_ATTR_GROUP_VLAN:
 154                 NLA_PUT_U32(msg, SWITCH_ATTR_OP_VLAN, val->port_vlan);
 155                 break;
 156         default:
 157                 break;
 158         }
 159
 160         return 0;
 161
 162 nla_put_failure:
 163         return -1;
 164 }
 165
 166 static int
 167 store_port_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val)
 168 {
 169         struct nlattr *p;
 170         int ports = val->attr->dev->ports;
 171         int err = 0;
 172         int remaining;
 173
 174         if (!val->value.ports)
 175                 val->value.ports = malloc(sizeof(struct switch_port) * ports);
 176
 177         nla_for_each_nested(p, nla, remaining) {
 178                 struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
 179                 struct switch_port *port;
 180
 181                 if (val->len >= ports)
 182                         break;
 183
 184                 err = nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, p, port_policy);
 185                 if (err < 0)
 186                         goto out;
 187
 188                 if (!tb[SWITCH_PORT_ID])
 189                         continue;
 190
 191                 port = &val->value.ports[val->len];
 192                 port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
 193                 port->flags = 0;
 194                 if (tb[SWITCH_PORT_FLAG_TAGGED])
 195                         port->flags |= SWLIB_PORT_FLAG_TAGGED;
 196
 197                 val->len++;
 198         }
 199
 200 out:
 201         return err;
 202 }
 203
 204 static int
 205 store_val(struct nl_msg *msg, void *arg)
 206 {
 207         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 208         struct switch_val *val = arg;
 209
 210         if (!val)
 211                 goto error;
 212
 213         if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
 214                         genlmsg_attrlen(gnlh, 0), NULL) < 0) {
 215                 goto error;
 216         }
 217
 218         if (tb[SWITCH_ATTR_OP_VALUE_INT])
 219                 val->value.i = nla_get_u32(tb[SWITCH_ATTR_OP_VALUE_INT]);
 220         else if (tb[SWITCH_ATTR_OP_VALUE_STR])
 221                 val->value.s = strdup(nla_get_string(tb[SWITCH_ATTR_OP_VALUE_STR]));
 222         else if (tb[SWITCH_ATTR_OP_VALUE_PORTS])
 223                 val->err = store_port_val(msg, tb[SWITCH_ATTR_OP_VALUE_PORTS], val);
 224
 225         val->err = 0;
 226         return 0;
 227
 228 error:
 229         return NL_SKIP;
 230 }
 231
 232 int
 233 swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
 234 {
 235         int cmd;
 236         int err;
 237
 238         switch(attr->atype) {
 239         case SWLIB_ATTR_GROUP_GLOBAL:
 240                 cmd = SWITCH_CMD_GET_GLOBAL;
 241                 break;
 242         case SWLIB_ATTR_GROUP_PORT:
 243                 cmd = SWITCH_CMD_GET_PORT;
 244                 break;
 245         case SWLIB_ATTR_GROUP_VLAN:
 246                 cmd = SWITCH_CMD_GET_VLAN;
 247                 break;
 248         default:
 249                 return -EINVAL;
 250         }
 251
 252         memset(&val->value, 0, sizeof(val->value));
 253         val->len = 0;
 254         val->attr = attr;
 255         val->err = -EINVAL;
 256         err = swlib_call(cmd, store_val, send_attr, val);
 257         if (!err)
 258                 err = val->err;
 259
 260         return err;
 261 }
 262
 263 static int
 264 send_attr_ports(struct nl_msg *msg, struct switch_val *val)
 265 {
 266         struct nlattr *n;
 267         int i;
 268
 269         /* TODO implement multipart? */
 270         if (val->len == 0)
 271                 goto done;
 272         n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_PORTS);
 273         if (!n)
 274                 goto nla_put_failure;
 275         for (i = 0; i < val->len; i++) {
 276                 struct switch_port *port = &val->value.ports[i];
 277                 struct nlattr *np;
 278
 279                 np = nla_nest_start(msg, SWITCH_ATTR_PORT);
 280                 if (!np)
 281                         goto nla_put_failure;
 282
 283                 NLA_PUT_U32(msg, SWITCH_PORT_ID, port->id);
 284                 if (port->flags & SWLIB_PORT_FLAG_TAGGED)
 285                         NLA_PUT_FLAG(msg, SWITCH_PORT_FLAG_TAGGED);
 286
 287                 nla_nest_end(msg, np);
 288         }
 289         nla_nest_end(msg, n);
 290 done:
 291         return 0;
 292
 293 nla_put_failure:
 294         return -1;
 295 }
 296
 297 static int
 298 send_attr_val(struct nl_msg *msg, void *arg)
 299 {
 300         struct switch_val *val = arg;
 301         struct switch_attr *attr = val->attr;
 302
 303         if (send_attr(msg, arg))
 304                 goto nla_put_failure;
 305
 306         switch(attr->type) {
 307         case SWITCH_TYPE_NOVAL:
 308                 break;
 309         case SWITCH_TYPE_INT:
 310                 NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val->value.i);
 311                 break;
 312         case SWITCH_TYPE_STRING:
 313                 if (!val->value.s)
 314                         goto nla_put_failure;
 315                 NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val->value.s);
 316                 break;
 317         case SWITCH_TYPE_PORTS:
 318                 if (send_attr_ports(msg, val) < 0)
 319                         goto nla_put_failure;
 320                 break;
 321         default:
 322                 goto nla_put_failure;
 323         }
 324         return 0;
 325
 326 nla_put_failure:
 327         return -1;
 328 }
 329
 330 int
 331 swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
 332 {
 333         int cmd;
 334
 335         switch(attr->atype) {
 336         case SWLIB_ATTR_GROUP_GLOBAL:
 337                 cmd = SWITCH_CMD_SET_GLOBAL;
 338                 break;
 339         case SWLIB_ATTR_GROUP_PORT:
 340                 cmd = SWITCH_CMD_SET_PORT;
 341                 break;
 342         case SWLIB_ATTR_GROUP_VLAN:
 343                 cmd = SWITCH_CMD_SET_VLAN;
 344                 break;
 345         default:
 346                 return -EINVAL;
 347         }
 348
 349         val->attr = attr;
 350         return swlib_call(cmd, NULL, send_attr_val, val);
 351 }
 352
 353 int swlib_set_attr_string(struct switch_dev *dev, struct switch_attr *a, int port_vlan, const char *str)
 354 {
 355         struct switch_port *ports;
 356         struct switch_val val;
 357         char *ptr;
 358
 359         memset(&val, 0, sizeof(val));
 360         val.port_vlan = port_vlan;
 361         switch(a->type) {
 362         case SWITCH_TYPE_INT:
 363                 val.value.i = atoi(str);
 364                 break;
 365         case SWITCH_TYPE_STRING:
 366                 val.value.s = (char *)str;
 367                 break;
 368         case SWITCH_TYPE_PORTS:
 369                 ports = alloca(sizeof(struct switch_port) * dev->ports);
 370                 memset(ports, 0, sizeof(struct switch_port) * dev->ports);
 371                 val.len = 0;
 372                 ptr = (char *)str;
 373                 while(ptr && *ptr)
 374                 {
 375                         while(*ptr && isspace(*ptr))
 376                                 ptr++;
 377
 378                         if (!*ptr)
 379                                 break;
 380
 381                         if (!isdigit(*ptr))
 382                                 return -1;
 383
 384                         if (val.len >= dev->ports)
 385                                 return -1;
 386
 387                         ports[val.len].flags = 0;
 388                         ports[val.len].id = strtoul(ptr, &ptr, 10);
 389                         while(*ptr && !isspace(*ptr)) {
 390                                 if (*ptr == 't')
 391                                         ports[val.len].flags |= SWLIB_PORT_FLAG_TAGGED;
 392                                 else
 393                                         return -1;
 394
 395                                 ptr++;
 396                         }
 397                         if (*ptr)
 398                                 ptr++;
 399                         val.len++;
 400                 }
 401                 val.value.ports = ports;
 402                 break;
 403         case SWITCH_TYPE_NOVAL:
 404                 if (str && !strcmp(str, "0"))
 405                         return 0;
 406
 407                 break;
 408         default:
 409                 return -1;
 410         }
 411         return swlib_set_attr(dev, a, &val);
 412 }
 413
 414
 415 struct attrlist_arg {
 416         int id;
 417         int atype;
 418         struct switch_dev *dev;
 419         struct switch_attr *prev;
 420         struct switch_attr **head;
 421 };
 422
 423 static int
 424 add_id(struct nl_msg *msg, void *arg)
 425 {
 426         struct attrlist_arg *l = arg;
 427
 428         NLA_PUT_U32(msg, SWITCH_ATTR_ID, l->id);
 429
 430         return 0;
 431 nla_put_failure:
 432         return -1;
 433 }
 434
 435 static int
 436 add_attr(struct nl_msg *msg, void *ptr)
 437 {
 438         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 439         struct attrlist_arg *arg = ptr;
 440         struct switch_attr *new;
 441
 442         if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
 443                         genlmsg_attrlen(gnlh, 0), NULL) < 0)
 444                 goto done;
 445
 446         new = swlib_alloc(sizeof(struct switch_attr));
 447         if (!new)
 448                 goto done;
 449
 450         new->dev = arg->dev;
 451         new->atype = arg->atype;
 452         if (arg->prev) {
 453                 arg->prev->next = new;
 454         } else {
 455                 arg->prev = *arg->head;
 456         }
 457         *arg->head = new;
 458         arg->head = &new->next;
 459
 460         if (tb[SWITCH_ATTR_OP_ID])
 461                 new->id = nla_get_u32(tb[SWITCH_ATTR_OP_ID]);
 462         if (tb[SWITCH_ATTR_OP_TYPE])
 463                 new->type = nla_get_u32(tb[SWITCH_ATTR_OP_TYPE]);
 464         if (tb[SWITCH_ATTR_OP_NAME])
 465                 new->name = strdup(nla_get_string(tb[SWITCH_ATTR_OP_NAME]));
 466         if (tb[SWITCH_ATTR_OP_DESCRIPTION])
 467                 new->description = strdup(nla_get_string(tb[SWITCH_ATTR_OP_DESCRIPTION]));
 468
 469 done:
 470         return NL_SKIP;
 471 }
 472
 473 int
 474 swlib_scan(struct switch_dev *dev)
 475 {
 476         struct attrlist_arg arg;
 477
 478         if (dev->ops || dev->port_ops || dev->vlan_ops)
 479                 return 0;
 480
 481         arg.atype = SWLIB_ATTR_GROUP_GLOBAL;
 482         arg.dev = dev;
 483         arg.id = dev->id;
 484         arg.prev = NULL;
 485         arg.head = &dev->ops;
 486         swlib_call(SWITCH_CMD_LIST_GLOBAL, add_attr, add_id, &arg);
 487
 488         arg.atype = SWLIB_ATTR_GROUP_PORT;
 489         arg.prev = NULL;
 490         arg.head = &dev->port_ops;
 491         swlib_call(SWITCH_CMD_LIST_PORT, add_attr, add_id, &arg);
 492
 493         arg.atype = SWLIB_ATTR_GROUP_VLAN;
 494         arg.prev = NULL;
 495         arg.head = &dev->vlan_ops;
 496         swlib_call(SWITCH_CMD_LIST_VLAN, add_attr, add_id, &arg);
 497
 498         return 0;
 499 }
 500
 501 struct switch_attr *swlib_lookup_attr(struct switch_dev *dev,
 502                 enum swlib_attr_group atype, const char *name)
 503 {
 504         struct switch_attr *head;
 505
 506         if (!name || !dev)
 507                 return NULL;
 508
 509         switch(atype) {
 510         case SWLIB_ATTR_GROUP_GLOBAL:
 511                 head = dev->ops;
 512                 break;
 513         case SWLIB_ATTR_GROUP_PORT:
 514                 head = dev->port_ops;
 515                 break;
 516         case SWLIB_ATTR_GROUP_VLAN:
 517                 head = dev->vlan_ops;
 518                 break;
 519         }
 520         while(head) {
 521                 if (!strcmp(name, head->name))
 522                         return head;
 523                 head = head->next;
 524         }
 525
 526         return NULL;
 527 }
 528
 529 static void
 530 swlib_priv_free(void)
 531 {
 532         if (cache)
 533                 nl_cache_free(cache);
 534         if (handle)
 535                 nl_socket_free(handle);
 536         handle = NULL;
 537         cache = NULL;
 538 }
 539
 540 static int
 541 swlib_priv_init(void)
 542 {
 543         int ret;
 544
 545         handle = nl_socket_alloc();
 546         if (!handle) {
 547                 DPRINTF("Failed to create handle\n");
 548                 goto err;
 549         }
 550
 551         if (genl_connect(handle)) {
 552                 DPRINTF("Failed to connect to generic netlink\n");
 553                 goto err;
 554         }
 555
 556         ret = genl_ctrl_alloc_cache(handle, &cache);
 557         if (ret < 0) {
 558                 DPRINTF("Failed to allocate netlink cache\n");
 559                 goto err;
 560         }
 561
 562         family = genl_ctrl_search_by_name(cache, "switch");
 563         if (!family) {
 564                 DPRINTF("Switch API not present\n");
 565                 goto err;
 566         }
 567         return 0;
 568
 569 err:
 570         swlib_priv_free();
 571         return -EINVAL;
 572 }
 573
 574 struct swlib_scan_arg {
 575         const char *name;
 576         struct switch_dev *head;
 577         struct switch_dev *ptr;
 578 };
 579
 580 static int
 581 add_port_map(struct switch_dev *dev, struct nlattr *nla)
 582 {
 583         struct nlattr *p;
 584         int err = 0, idx = 0;
 585         int remaining;
 586
 587         dev->maps = malloc(sizeof(struct switch_portmap) * dev->ports);
 588         if (!dev->maps)
 589                 return -1;
 590         memset(dev->maps, 0, sizeof(struct switch_portmap) * dev->ports);
 591
 592         nla_for_each_nested(p, nla, remaining) {
 593                 struct nlattr *tb[SWITCH_PORTMAP_MAX+1];
 594
 595                 if (idx >= dev->ports)
 596                         continue;
 597
 598                 err = nla_parse_nested(tb, SWITCH_PORTMAP_MAX, p, portmap_policy);
 599                 if (err < 0)
 600                         continue;
 601
 602
 603                 if (tb[SWITCH_PORTMAP_SEGMENT] && tb[SWITCH_PORTMAP_VIRT]) {
 604                         dev->maps[idx].segment = strdup(nla_get_string(tb[SWITCH_PORTMAP_SEGMENT]));
 605                         dev->maps[idx].virt = nla_get_u32(tb[SWITCH_PORTMAP_VIRT]);
 606                 }
 607                 idx++;
 608         }
 609
 610 out:
 611         return err;
 612 }
 613
 614
 615 static int
 616 add_switch(struct nl_msg *msg, void *arg)
 617 {
 618         struct swlib_scan_arg *sa = arg;
 619         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 620         struct switch_dev *dev;
 621         const char *name;
 622         const char *alias;
 623
 624         if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
 625                 goto done;
 626
 627         if (!tb[SWITCH_ATTR_DEV_NAME])
 628                 goto done;
 629
 630         name = nla_get_string(tb[SWITCH_ATTR_DEV_NAME]);
 631         alias = nla_get_string(tb[SWITCH_ATTR_ALIAS]);
 632
 633         if (sa->name && (strcmp(name, sa->name) != 0) && (strcmp(alias, sa->name) != 0))
 634                 goto done;
 635
 636         dev = swlib_alloc(sizeof(struct switch_dev));
 637         if (!dev)
 638                 goto done;
 639
 640         strncpy(dev->dev_name, name, IFNAMSIZ - 1);
 641         dev->alias = strdup(alias);
 642         if (tb[SWITCH_ATTR_ID])
 643                 dev->id = nla_get_u32(tb[SWITCH_ATTR_ID]);
 644         if (tb[SWITCH_ATTR_NAME])
 645                 dev->name = strdup(nla_get_string(tb[SWITCH_ATTR_NAME]));
 646         if (tb[SWITCH_ATTR_PORTS])
 647                 dev->ports = nla_get_u32(tb[SWITCH_ATTR_PORTS]);
 648         if (tb[SWITCH_ATTR_VLANS])
 649                 dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]);
 650         if (tb[SWITCH_ATTR_CPU_PORT])
 651                 dev->cpu_port = nla_get_u32(tb[SWITCH_ATTR_CPU_PORT]);
 652         if (tb[SWITCH_ATTR_PORTMAP])
 653                 add_port_map(dev, tb[SWITCH_ATTR_PORTMAP]);
 654
 655         if (!sa->head) {
 656                 sa->head = dev;
 657                 sa->ptr = dev;
 658         } else {
 659                 sa->ptr->next = dev;
 660                 sa->ptr = dev;
 661         }
 662
 663         refcount++;
 664 done:
 665         return NL_SKIP;
 666 }
 667
 668 static int
 669 list_switch(struct nl_msg *msg, void *arg)
 670 {
 671         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 672
 673         if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
 674                 goto done;
 675
 676         if (!tb[SWITCH_ATTR_DEV_NAME] || !tb[SWITCH_ATTR_NAME])
 677                 goto done;
 678
 679         printf("Found: %s - %s\n", nla_get_string(tb[SWITCH_ATTR_DEV_NAME]),
 680                 nla_get_string(tb[SWITCH_ATTR_ALIAS]));
 681
 682 done:
 683         return NL_SKIP;
 684 }
 685
 686 void
 687 swlib_list(void)
 688 {
 689         if (swlib_priv_init() < 0)
 690                 return;
 691         swlib_call(SWITCH_CMD_GET_SWITCH, list_switch, NULL, NULL);
 692         swlib_priv_free();
 693 }
 694
 695 void
 696 swlib_print_portmap(struct switch_dev *dev, char *segment)
 697 {
 698         int i;
 699
 700         if (segment) {
 701                 if (!strcmp(segment, "cpu")) {
 702                         printf("%d ", dev->cpu_port);
 703                 } else if (!strcmp(segment, "disabled")) {
 704                         for (i = 0; i < dev->ports; i++)
 705                                 if (!dev->maps[i].segment)
 706                                         printf("%d ", i);
 707                 } else for (i = 0; i < dev->ports; i++) {
 708                         if (dev->maps[i].segment && !strcmp(dev->maps[i].segment, segment))
 709                                 printf("%d ", i);
 710                 }
 711         } else {
 712                 printf("%s - %s\n", dev->dev_name, dev->name);
 713                 for (i = 0; i < dev->ports; i++)
 714                         if (i == dev->cpu_port)
 715                                 printf("port%d:\tcpu\n", i);
 716                         else if (dev->maps[i].segment)
 717                                 printf("port%d:\t%s.%d\n", i, dev->maps[i].segment, dev->maps[i].virt);
 718                         else
 719                                 printf("port%d:\tdisabled\n", i);
 720         }
 721 }
 722
 723 struct switch_dev *
 724 swlib_connect(const char *name)
 725 {
 726         struct swlib_scan_arg arg;
 727
 728         if (!refcount) {
 729                 if (swlib_priv_init() < 0)
 730                         return NULL;
 731         };
 732
 733         arg.head = NULL;
 734         arg.ptr = NULL;
 735         arg.name = name;
 736         swlib_call(SWITCH_CMD_GET_SWITCH, add_switch, NULL, &arg);
 737
 738         if (!refcount)
 739                 swlib_priv_free();
 740
 741         return arg.head;
 742 }
 743
 744 static void
 745 swlib_free_attributes(struct switch_attr **head)
 746 {
 747         struct switch_attr *a = *head;
 748         struct switch_attr *next;
 749
 750         while (a) {
 751                 next = a->next;
 752                 free(a->name);
 753                 free(a->description);
 754                 free(a);
 755                 a = next;
 756         }
 757         *head = NULL;
 758 }
 759
 760 static void
 761 swlib_free_port_map(struct switch_dev *dev)
 762 {
 763         int i;
 764
 765         if (!dev || !dev->maps)
 766                 return;
 767
 768         for (i = 0; i < dev->ports; i++)
 769                 free(dev->maps[i].segment);
 770         free(dev->maps);
 771 }
 772
 773 void
 774 swlib_free(struct switch_dev *dev)
 775 {
 776         swlib_free_attributes(&dev->ops);
 777         swlib_free_attributes(&dev->port_ops);
 778         swlib_free_attributes(&dev->vlan_ops);
 779         swlib_free_port_map(dev);
 780         free(dev->name);
 781         free(dev->alias);
 782         free(dev);
 783
 784         if (--refcount == 0)
 785                 swlib_priv_free();
 786 }
 787
 788 void
 789 swlib_free_all(struct switch_dev *dev)
 790 {
 791         struct switch_dev *p;
 792
 793         while (dev) {
 794                 p = dev->next;
 795                 swlib_free(dev);
 796                 dev = p;
 797         }
 798 }