zebra/zebra_ptm.c

   1 /* Kernel routing table updates using netlink over GNU/Linux system.
   2  * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22 #include <sys/un.h> /* for sockaddr_un */
  23 #include <net/if.h>
  24 #include "vty.h"
  25 #include "zebra/zserv.h"
  26 #include "zebra/interface.h"
  27 #include "zebra/debug.h"
  28 #include "zebra/zebra_ptm.h"
  29 #include "if.h"
  30 #include "command.h"
  31 #include "stream.h"
  32 #include "ptm_lib.h"
  33 #include "network.h"
  34 #include "buffer.h"
  35 #include "zebra/zebra_ptm_redistribute.h"
  36 #include "bfd.h"
  37 #include "vrf.h"
  38 #include "rib.h"
  39 #include "zebra_vrf.h"
  40 #include "version.h"
  41
  42 #define ZEBRA_PTM_RECONNECT_TIME_INITIAL 1 /* initial reconnect is 1s */
  43 #define ZEBRA_PTM_RECONNECT_TIME_MAX     300
  44
  45 #define PTM_MSG_LEN     4
  46 #define PTM_HEADER_LEN  37
  47
  48 const char ZEBRA_PTM_GET_STATUS_CMD[] = "get-status";
  49 const char ZEBRA_PTM_BFD_START_CMD[] = "start-bfd-sess";
  50 const char ZEBRA_PTM_BFD_STOP_CMD[] = "stop-bfd-sess";
  51 const char ZEBRA_PTM_BFD_CLIENT_REG_CMD[] = "reg-bfd-client";
  52 const char ZEBRA_PTM_BFD_CLIENT_DEREG_CMD[] = "dereg-bfd-client";
  53
  54 const char ZEBRA_PTM_CMD_STR[] = "cmd";
  55 const char ZEBRA_PTM_CMD_STATUS_STR[] = "cmd_status";
  56 const char ZEBRA_PTM_PORT_STR[] = "port";
  57 const char ZEBRA_PTM_CBL_STR[] = "cbl status";
  58 const char ZEBRA_PTM_PASS_STR[] = "pass";
  59 const char ZEBRA_PTM_FAIL_STR[] = "fail";
  60 const char ZEBRA_PTM_BFDSTATUS_STR[] = "state";
  61 const char ZEBRA_PTM_BFDSTATUS_UP_STR[] = "Up";
  62 const char ZEBRA_PTM_BFDSTATUS_DOWN_STR[] = "Down";
  63 const char ZEBRA_PTM_BFDDEST_STR[] = "peer";
  64 const char ZEBRA_PTM_BFDSRC_STR[] = "local";
  65 const char ZEBRA_PTM_BFDVRF_STR[] = "vrf";
  66 const char ZEBRA_PTM_INVALID_PORT_NAME[] = "N/A";
  67 const char ZEBRA_PTM_INVALID_SRC_IP[] = "N/A";
  68 const char ZEBRA_PTM_INVALID_VRF[] = "N/A";
  69
  70 const char ZEBRA_PTM_BFD_DST_IP_FIELD[] = "dstIPaddr";
  71 const char ZEBRA_PTM_BFD_SRC_IP_FIELD[] = "srcIPaddr";
  72 const char ZEBRA_PTM_BFD_MIN_RX_FIELD[] = "requiredMinRx";
  73 const char ZEBRA_PTM_BFD_MIN_TX_FIELD[] = "upMinTx";
  74 const char ZEBRA_PTM_BFD_DETECT_MULT_FIELD[] = "detectMult";
  75 const char ZEBRA_PTM_BFD_MULTI_HOP_FIELD[] = "multiHop";
  76 const char ZEBRA_PTM_BFD_CLIENT_FIELD[] = "client";
  77 const char ZEBRA_PTM_BFD_SEQID_FIELD[] = "seqid";
  78 const char ZEBRA_PTM_BFD_IFNAME_FIELD[] = "ifName";
  79 const char ZEBRA_PTM_BFD_MAX_HOP_CNT_FIELD[] = "maxHopCnt";
  80 const char ZEBRA_PTM_BFD_SEND_EVENT[] = "sendEvent";
  81 const char ZEBRA_PTM_BFD_VRF_NAME_FIELD[] = "vrfName";
  82
  83 static ptm_lib_handle_t *ptm_hdl;
  84
  85 struct zebra_ptm_cb ptm_cb;
  86
  87 static int zebra_ptm_socket_init(void);
  88 int zebra_ptm_sock_read(struct thread *);
  89 static void zebra_ptm_install_commands(void);
  90 static int zebra_ptm_handle_msg_cb(void *arg, void *in_ctxt);
  91 void zebra_bfd_peer_replay_req(void);
  92 void zebra_ptm_send_status_req(void);
  93 void zebra_ptm_reset_status(int ptm_disable);
  94
  95 const char ZEBRA_PTM_SOCK_NAME[] = "\0/var/run/ptmd.socket";
  96
  97 void zebra_ptm_init(void)
  98 {
  99         char buf[64];
 100
 101         memset(&ptm_cb, 0, sizeof(struct zebra_ptm_cb));
 102
 103         ptm_cb.out_data = calloc(1, ZEBRA_PTM_SEND_MAX_SOCKBUF);
 104         if (!ptm_cb.out_data) {
 105                 zlog_warn("%s: Allocation of send data failed", __func__);
 106                 return;
 107         }
 108
 109         ptm_cb.in_data = calloc(1, ZEBRA_PTM_MAX_SOCKBUF);
 110         if (!ptm_cb.in_data) {
 111                 zlog_warn("%s: Allocation of recv data failed", __func__);
 112                 free(ptm_cb.out_data);
 113                 return;
 114         }
 115
 116         ptm_cb.pid = getpid();
 117         zebra_ptm_install_commands();
 118
 119         sprintf(buf, "%s", FRR_PTM_NAME);
 120         ptm_hdl = ptm_lib_register(buf, NULL, zebra_ptm_handle_msg_cb,
 121                                    zebra_ptm_handle_msg_cb);
 122         ptm_cb.wb = buffer_new(0);
 123
 124         ptm_cb.reconnect_time = ZEBRA_PTM_RECONNECT_TIME_INITIAL;
 125
 126         ptm_cb.ptm_sock = -1;
 127 }
 128
 129 void zebra_ptm_finish(void)
 130 {
 131         int proto;
 132
 133         for (proto = 0; proto < ZEBRA_ROUTE_MAX; proto++)
 134                 if (CHECK_FLAG(ptm_cb.client_flags[proto],
 135                                ZEBRA_PTM_BFD_CLIENT_FLAG_REG))
 136                         zebra_ptm_bfd_client_deregister(proto);
 137
 138         buffer_flush_all(ptm_cb.wb, ptm_cb.ptm_sock);
 139
 140         free(ptm_hdl);
 141
 142         if (ptm_cb.out_data)
 143                 free(ptm_cb.out_data);
 144
 145         if (ptm_cb.in_data)
 146                 free(ptm_cb.in_data);
 147
 148         /* Release threads. */
 149         if (ptm_cb.t_read)
 150                 thread_cancel(ptm_cb.t_read);
 151         if (ptm_cb.t_write)
 152                 thread_cancel(ptm_cb.t_write);
 153         if (ptm_cb.t_timer)
 154                 thread_cancel(ptm_cb.t_timer);
 155
 156         if (ptm_cb.wb)
 157                 buffer_free(ptm_cb.wb);
 158
 159         if (ptm_cb.ptm_sock >= 0)
 160                 close(ptm_cb.ptm_sock);
 161 }
 162
 163 static int zebra_ptm_flush_messages(struct thread *thread)
 164 {
 165         ptm_cb.t_write = NULL;
 166
 167         if (ptm_cb.ptm_sock == -1)
 168                 return -1;
 169
 170         errno = 0;
 171
 172         switch (buffer_flush_available(ptm_cb.wb, ptm_cb.ptm_sock)) {
 173         case BUFFER_ERROR:
 174                 zlog_warn("%s ptm socket error: %s", __func__,
 175                           safe_strerror(errno));
 176                 close(ptm_cb.ptm_sock);
 177                 ptm_cb.ptm_sock = -1;
 178                 zebra_ptm_reset_status(0);
 179                 ptm_cb.t_timer = NULL;
 180                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 181                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
 182                 return (-1);
 183         case BUFFER_PENDING:
 184                 ptm_cb.t_write = NULL;
 185                 thread_add_write(zebrad.master, zebra_ptm_flush_messages, NULL,
 186                                  ptm_cb.ptm_sock, &ptm_cb.t_write);
 187                 break;
 188         case BUFFER_EMPTY:
 189                 break;
 190         }
 191
 192         return (0);
 193 }
 194
 195 static int zebra_ptm_send_message(char *data, int size)
 196 {
 197         errno = 0;
 198         switch (buffer_write(ptm_cb.wb, ptm_cb.ptm_sock, data, size)) {
 199         case BUFFER_ERROR:
 200                 zlog_warn("%s ptm socket error: %s", __func__,
 201                           safe_strerror(errno));
 202                 close(ptm_cb.ptm_sock);
 203                 ptm_cb.ptm_sock = -1;
 204                 zebra_ptm_reset_status(0);
 205                 ptm_cb.t_timer = NULL;
 206                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 207                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
 208                 return -1;
 209         case BUFFER_EMPTY:
 210                 THREAD_OFF(ptm_cb.t_write);
 211                 break;
 212         case BUFFER_PENDING:
 213                 thread_add_write(zebrad.master, zebra_ptm_flush_messages, NULL,
 214                                  ptm_cb.ptm_sock, &ptm_cb.t_write);
 215                 break;
 216         }
 217
 218         return 0;
 219 }
 220
 221 int zebra_ptm_connect(struct thread *t)
 222 {
 223         int init = 0;
 224
 225         if (ptm_cb.ptm_sock == -1) {
 226                 zebra_ptm_socket_init();
 227                 init = 1;
 228         }
 229
 230         if (ptm_cb.ptm_sock != -1) {
 231                 if (init) {
 232                         ptm_cb.t_read = NULL;
 233                         thread_add_read(zebrad.master, zebra_ptm_sock_read,
 234                                         NULL, ptm_cb.ptm_sock, &ptm_cb.t_read);
 235                         zebra_bfd_peer_replay_req();
 236                 }
 237                 zebra_ptm_send_status_req();
 238                 ptm_cb.reconnect_time = ZEBRA_PTM_RECONNECT_TIME_INITIAL;
 239         } else if (ptm_cb.reconnect_time < ZEBRA_PTM_RECONNECT_TIME_MAX) {
 240                 ptm_cb.reconnect_time *= 2;
 241                 if (ptm_cb.reconnect_time > ZEBRA_PTM_RECONNECT_TIME_MAX)
 242                         ptm_cb.reconnect_time = ZEBRA_PTM_RECONNECT_TIME_MAX;
 243
 244                 ptm_cb.t_timer = NULL;
 245                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 246                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
 247         } else if (ptm_cb.reconnect_time >= ZEBRA_PTM_RECONNECT_TIME_MAX) {
 248                 ptm_cb.reconnect_time = ZEBRA_PTM_RECONNECT_TIME_INITIAL;
 249         }
 250
 251         return (errno);
 252 }
 253
 254 DEFUN (zebra_ptm_enable,
 255        zebra_ptm_enable_cmd,
 256        "ptm-enable",
 257        "Enable neighbor check with specified topology\n")
 258 {
 259         struct vrf *vrf;
 260         struct interface *ifp;
 261         struct zebra_if *if_data;
 262
 263         ptm_cb.ptm_enable = ZEBRA_IF_PTM_ENABLE_ON;
 264
 265         RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
 266                 FOR_ALL_INTERFACES (vrf, ifp)
 267                         if (!ifp->ptm_enable) {
 268                                 if_data = (struct zebra_if *)ifp->info;
 269                                 if (if_data
 270                                     && (if_data->ptm_enable
 271                                         == ZEBRA_IF_PTM_ENABLE_UNSPEC)) {
 272                                         ifp->ptm_enable =
 273                                                 ZEBRA_IF_PTM_ENABLE_ON;
 274                                 }
 275                                 /* Assign a default unknown status */
 276                                 ifp->ptm_status = ZEBRA_PTM_STATUS_UNKNOWN;
 277                         }
 278
 279         zebra_ptm_connect(NULL);
 280
 281         return CMD_SUCCESS;
 282 }
 283
 284 DEFUN (no_zebra_ptm_enable,
 285        no_zebra_ptm_enable_cmd,
 286        "no ptm-enable",
 287        NO_STR
 288        "Enable neighbor check with specified topology\n")
 289 {
 290         ptm_cb.ptm_enable = ZEBRA_IF_PTM_ENABLE_OFF;
 291         zebra_ptm_reset_status(1);
 292         return CMD_SUCCESS;
 293 }
 294
 295 DEFUN (zebra_ptm_enable_if,
 296        zebra_ptm_enable_if_cmd,
 297        "ptm-enable",
 298        "Enable neighbor check with specified topology\n")
 299 {
 300         VTY_DECLVAR_CONTEXT(interface, ifp);
 301         struct zebra_if *if_data;
 302         int old_ptm_enable;
 303         int send_linkdown = 0;
 304
 305         if (ifp->ifindex == IFINDEX_INTERNAL) {
 306                 return CMD_SUCCESS;
 307         }
 308
 309         old_ptm_enable = ifp->ptm_enable;
 310         ifp->ptm_enable = ptm_cb.ptm_enable;
 311
 312         if (if_is_no_ptm_operative(ifp))
 313                 send_linkdown = 1;
 314
 315         if (!old_ptm_enable && ptm_cb.ptm_enable) {
 316                 if (!if_is_operative(ifp) && send_linkdown) {
 317                         if (IS_ZEBRA_DEBUG_EVENT)
 318                                 zlog_debug("%s: Bringing down interface %s\n",
 319                                            __func__, ifp->name);
 320                         if_down(ifp);
 321                 }
 322         }
 323
 324         if_data = ifp->info;
 325         if_data->ptm_enable = ZEBRA_IF_PTM_ENABLE_UNSPEC;
 326
 327         return CMD_SUCCESS;
 328 }
 329
 330 DEFUN (no_zebra_ptm_enable_if,
 331        no_zebra_ptm_enable_if_cmd,
 332        "no ptm-enable",
 333        NO_STR
 334        "Enable neighbor check with specified topology\n")
 335 {
 336         VTY_DECLVAR_CONTEXT(interface, ifp);
 337         int send_linkup = 0;
 338         struct zebra_if *if_data;
 339
 340         if ((ifp->ifindex != IFINDEX_INTERNAL) && (ifp->ptm_enable)) {
 341                 if (!if_is_operative(ifp))
 342                         send_linkup = 1;
 343
 344                 ifp->ptm_enable = ZEBRA_IF_PTM_ENABLE_OFF;
 345                 if (if_is_no_ptm_operative(ifp) && send_linkup) {
 346                         if (IS_ZEBRA_DEBUG_EVENT)
 347                                 zlog_debug("%s: Bringing up interface %s\n",
 348                                            __func__, ifp->name);
 349                         if_up(ifp);
 350                 }
 351         }
 352
 353         if_data = ifp->info;
 354         if_data->ptm_enable = ZEBRA_IF_PTM_ENABLE_OFF;
 355
 356         return CMD_SUCCESS;
 357 }
 358
 359
 360 void zebra_ptm_write(struct vty *vty)
 361 {
 362         if (ptm_cb.ptm_enable)
 363                 vty_out(vty, "ptm-enable\n");
 364
 365         return;
 366 }
 367
 368 static int zebra_ptm_socket_init(void)
 369 {
 370         int ret;
 371         int sock;
 372         struct sockaddr_un addr;
 373
 374         ptm_cb.ptm_sock = -1;
 375
 376         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 377         if (sock < 0)
 378                 return -1;
 379         if (set_nonblocking(sock) < 0) {
 380                 if (IS_ZEBRA_DEBUG_EVENT)
 381                         zlog_debug("%s: Unable to set socket non blocking[%s]",
 382                                    __PRETTY_FUNCTION__, safe_strerror(errno));
 383                 close(sock);
 384                 return -1;
 385         }
 386
 387         /* Make server socket. */
 388         memset(&addr, 0, sizeof(struct sockaddr_un));
 389         addr.sun_family = AF_UNIX;
 390         memcpy(&addr.sun_path, ZEBRA_PTM_SOCK_NAME,
 391                sizeof(ZEBRA_PTM_SOCK_NAME));
 392
 393         ret = connect(sock, (struct sockaddr *)&addr,
 394                       sizeof(addr.sun_family) + sizeof(ZEBRA_PTM_SOCK_NAME)
 395                               - 1);
 396         if (ret < 0) {
 397                 if (IS_ZEBRA_DEBUG_EVENT)
 398                         zlog_debug("%s: Unable to connect to socket %s [%s]",
 399                                    __func__, ZEBRA_PTM_SOCK_NAME,
 400                                    safe_strerror(errno));
 401                 close(sock);
 402                 return -1;
 403         }
 404         ptm_cb.ptm_sock = sock;
 405         return sock;
 406 }
 407
 408 static void zebra_ptm_install_commands(void)
 409 {
 410         install_element(CONFIG_NODE, &zebra_ptm_enable_cmd);
 411         install_element(CONFIG_NODE, &no_zebra_ptm_enable_cmd);
 412         install_element(INTERFACE_NODE, &zebra_ptm_enable_if_cmd);
 413         install_element(INTERFACE_NODE, &no_zebra_ptm_enable_if_cmd);
 414 }
 415
 416 /* BFD session goes down, send message to the protocols. */
 417 static void if_bfd_session_update(struct interface *ifp, struct prefix *dp,
 418                                   struct prefix *sp, int status,
 419                                   vrf_id_t vrf_id)
 420 {
 421         if (IS_ZEBRA_DEBUG_EVENT) {
 422                 char buf[2][INET6_ADDRSTRLEN];
 423
 424                 if (ifp) {
 425                         zlog_debug(
 426                                 "MESSAGE: ZEBRA_INTERFACE_BFD_DEST_UPDATE %s/%d on %s"
 427                                 " %s event",
 428                                 inet_ntop(dp->family, &dp->u.prefix, buf[0],
 429                                           INET6_ADDRSTRLEN),
 430                                 dp->prefixlen, ifp->name,
 431                                 bfd_get_status_str(status));
 432                 } else {
 433                         zlog_debug(
 434                                 "MESSAGE: ZEBRA_INTERFACE_BFD_DEST_UPDATE %s/%d "
 435                                 "with src %s/%d and vrf %d %s event",
 436                                 inet_ntop(dp->family, &dp->u.prefix, buf[0],
 437                                           INET6_ADDRSTRLEN),
 438                                 dp->prefixlen,
 439                                 inet_ntop(sp->family, &sp->u.prefix, buf[1],
 440                                           INET6_ADDRSTRLEN),
 441                                 sp->prefixlen, vrf_id,
 442                                 bfd_get_status_str(status));
 443                 }
 444         }
 445
 446         zebra_interface_bfd_update(ifp, dp, sp, status, vrf_id);
 447 }
 448
 449 static int zebra_ptm_handle_bfd_msg(void *arg, void *in_ctxt,
 450                                     struct interface *ifp)
 451 {
 452         char bfdst_str[32];
 453         char dest_str[64];
 454         char src_str[64];
 455         char vrf_str[64];
 456         struct prefix dest_prefix;
 457         struct prefix src_prefix;
 458         vrf_id_t vrf_id;
 459
 460         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_BFDSTATUS_STR, bfdst_str);
 461
 462         if (bfdst_str[0] == '\0') {
 463                 return -1;
 464         }
 465
 466         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_BFDDEST_STR, dest_str);
 467
 468         if (dest_str[0] == '\0') {
 469                 zlog_debug("%s: Key %s not found in PTM msg", __func__,
 470                            ZEBRA_PTM_BFDDEST_STR);
 471                 return -1;
 472         }
 473
 474         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_BFDSRC_STR, src_str);
 475
 476         if (src_str[0] == '\0') {
 477                 zlog_debug("%s: Key %s not found in PTM msg", __func__,
 478                            ZEBRA_PTM_BFDSRC_STR);
 479                 return -1;
 480         }
 481
 482         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_BFDVRF_STR, vrf_str);
 483
 484         if (vrf_str[0] == '\0') {
 485                 zlog_debug("%s: Key %s not found in PTM msg", __func__,
 486                            ZEBRA_PTM_BFDVRF_STR);
 487                 return -1;
 488         }
 489
 490         if (IS_ZEBRA_DEBUG_EVENT)
 491                 zlog_debug(
 492                         "%s: Recv Port [%s] bfd status [%s] vrf [%s]"
 493                         " peer [%s] local [%s]",
 494                         __func__, ifp ? ifp->name : "N/A", bfdst_str, vrf_str,
 495                         dest_str, src_str);
 496
 497         if (str2prefix(dest_str, &dest_prefix) == 0) {
 498                 zlog_err("%s: Peer addr %s not found", __func__, dest_str);
 499                 return -1;
 500         }
 501
 502         memset(&src_prefix, 0, sizeof(struct prefix));
 503         if (strcmp(ZEBRA_PTM_INVALID_SRC_IP, src_str)) {
 504                 if (str2prefix(src_str, &src_prefix) == 0) {
 505                         zlog_err("%s: Local addr %s not found", __func__,
 506                                  src_str);
 507                         return -1;
 508                 }
 509         }
 510
 511         if (!strcmp(ZEBRA_PTM_INVALID_VRF, vrf_str) && ifp) {
 512                 vrf_id = ifp->vrf_id;
 513         } else {
 514                 vrf_id = vrf_name_to_id(vrf_str);
 515         }
 516
 517         if (!strcmp(bfdst_str, ZEBRA_PTM_BFDSTATUS_DOWN_STR)) {
 518                 if_bfd_session_update(ifp, &dest_prefix, &src_prefix,
 519                                       BFD_STATUS_DOWN, vrf_id);
 520         } else {
 521                 if_bfd_session_update(ifp, &dest_prefix, &src_prefix,
 522                                       BFD_STATUS_UP, vrf_id);
 523         }
 524
 525         return 0;
 526 }
 527
 528 static int zebra_ptm_handle_cbl_msg(void *arg, void *in_ctxt,
 529                                     struct interface *ifp, char *cbl_str)
 530 {
 531         int send_linkup = 0;
 532
 533         if (IS_ZEBRA_DEBUG_EVENT)
 534                 zlog_debug("%s: Recv Port [%s] cbl status [%s]", __func__,
 535                            ifp->name, cbl_str);
 536
 537         if (!strcmp(cbl_str, ZEBRA_PTM_PASS_STR)
 538             && (ifp->ptm_status != ZEBRA_PTM_STATUS_UP)) {
 539
 540                 if (ifp->ptm_status == ZEBRA_PTM_STATUS_DOWN)
 541                         send_linkup = 1;
 542                 ifp->ptm_status = ZEBRA_PTM_STATUS_UP;
 543                 if (ifp->ptm_enable && if_is_no_ptm_operative(ifp)
 544                     && send_linkup)
 545                         if_up(ifp);
 546         } else if (!strcmp(cbl_str, ZEBRA_PTM_FAIL_STR)
 547                    && (ifp->ptm_status != ZEBRA_PTM_STATUS_DOWN)) {
 548                 ifp->ptm_status = ZEBRA_PTM_STATUS_DOWN;
 549                 if (ifp->ptm_enable && if_is_no_ptm_operative(ifp))
 550                         if_down(ifp);
 551         }
 552
 553         return 0;
 554 }
 555
 556 /*
 557  * zebra_ptm_handle_msg_cb - The purpose of this callback function is to handle
 558  *  all the command responses and notifications received from PTM.
 559  *
 560  * Command responses: Upon establishing connection with PTM, Zebra requests
 561  *  status of all interfaces using 'get-status' command if global ptm-enable
 562  *  knob is enabled. As a response to the get-status command PTM sends status
 563  *  of all the interfaces as command responses. All other type of command
 564  *  responses with cmd_status key word  are dropped. The sole purpose of
 565  *  registering this function as callback for the command responses is to
 566  *  handle the responses to get-status command.
 567  *
 568  * Notifications: Cable status and BFD session status changes are sent as
 569  *  notifications by PTM. So, this function is also the callback function for
 570  *  processing all the notifications from the PTM.
 571  *
 572  */
 573 static int zebra_ptm_handle_msg_cb(void *arg, void *in_ctxt)
 574 {
 575         struct interface *ifp = NULL;
 576         char port_str[128];
 577         char cbl_str[32];
 578         char cmd_status_str[32];
 579
 580         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_CMD_STATUS_STR,
 581                                 cmd_status_str);
 582
 583         /* Drop command response messages */
 584         if (cmd_status_str[0] != '\0') {
 585                 return 0;
 586         }
 587
 588         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_PORT_STR, port_str);
 589
 590         if (port_str[0] == '\0') {
 591                 zlog_debug("%s: Key %s not found in PTM msg", __func__,
 592                            ZEBRA_PTM_PORT_STR);
 593                 return -1;
 594         }
 595
 596         if (strcmp(ZEBRA_PTM_INVALID_PORT_NAME, port_str)) {
 597                 ifp = if_lookup_by_name_all_vrf(port_str);
 598
 599                 if (!ifp) {
 600                         zlog_err("%s: %s not found in interface list", __func__,
 601                                  port_str);
 602                         return -1;
 603                 }
 604         }
 605
 606         ptm_lib_find_key_in_msg(in_ctxt, ZEBRA_PTM_CBL_STR, cbl_str);
 607
 608         if (cbl_str[0] == '\0') {
 609                 return zebra_ptm_handle_bfd_msg(arg, in_ctxt, ifp);
 610         } else {
 611                 if (ifp) {
 612                         return zebra_ptm_handle_cbl_msg(arg, in_ctxt, ifp,
 613                                                         cbl_str);
 614                 } else {
 615                         return -1;
 616                 }
 617         }
 618 }
 619
 620 int zebra_ptm_sock_read(struct thread *thread)
 621 {
 622         int sock, done = 0;
 623         int rc;
 624
 625         errno = 0;
 626         sock = THREAD_FD(thread);
 627
 628         if (sock == -1)
 629                 return -1;
 630
 631         /* PTM communicates in CSV format */
 632         while (!done) {
 633                 rc = ptm_lib_process_msg(ptm_hdl, sock, ptm_cb.in_data,
 634                                          ZEBRA_PTM_MAX_SOCKBUF, NULL);
 635                 if (rc <= 0)
 636                         break;
 637         }
 638
 639         if (rc <= 0) {
 640                 if (((rc == 0) && !errno)
 641                     || (errno && (errno != EWOULDBLOCK) && (errno != EAGAIN))) {
 642                         zlog_warn("%s routing socket error: %s(%d) bytes %d",
 643                                   __func__, safe_strerror(errno), errno, rc);
 644
 645                         close(ptm_cb.ptm_sock);
 646                         ptm_cb.ptm_sock = -1;
 647                         zebra_ptm_reset_status(0);
 648                         ptm_cb.t_timer = NULL;
 649                         thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 650                                          ptm_cb.reconnect_time,
 651                                          &ptm_cb.t_timer);
 652                         return (-1);
 653                 }
 654         }
 655
 656         ptm_cb.t_read = NULL;
 657         thread_add_read(zebrad.master, zebra_ptm_sock_read, NULL,
 658                         ptm_cb.ptm_sock, &ptm_cb.t_read);
 659
 660         return 0;
 661 }
 662
 663 /* BFD peer/dst register/update */
 664 int zebra_ptm_bfd_dst_register(struct zserv *client, int sock, u_short length,
 665                                int command, struct zebra_vrf *zvrf)
 666 {
 667         struct stream *s;
 668         struct prefix src_p;
 669         struct prefix dst_p;
 670         u_char multi_hop;
 671         u_char multi_hop_cnt;
 672         u_char detect_mul;
 673         unsigned int min_rx_timer;
 674         unsigned int min_tx_timer;
 675         char if_name[INTERFACE_NAMSIZ];
 676         u_char len;
 677         void *out_ctxt;
 678         char buf[INET6_ADDRSTRLEN];
 679         char tmp_buf[64];
 680         int data_len = ZEBRA_PTM_SEND_MAX_SOCKBUF;
 681         unsigned int pid;
 682
 683         if (command == ZEBRA_BFD_DEST_UPDATE)
 684                 client->bfd_peer_upd8_cnt++;
 685         else
 686                 client->bfd_peer_add_cnt++;
 687
 688         if (IS_ZEBRA_DEBUG_EVENT)
 689                 zlog_debug("bfd_dst_register msg from client %s: length=%d",
 690                            zebra_route_string(client->proto), length);
 691
 692         if (ptm_cb.ptm_sock == -1) {
 693                 ptm_cb.t_timer = NULL;
 694                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 695                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
 696                 return -1;
 697         }
 698
 699         ptm_lib_init_msg(ptm_hdl, 0, PTMLIB_MSG_TYPE_CMD, NULL, &out_ctxt);
 700         sprintf(tmp_buf, "%s", ZEBRA_PTM_BFD_START_CMD);
 701         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_CMD_STR, tmp_buf);
 702         sprintf(tmp_buf, "%s", zebra_route_string(client->proto));
 703         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_CLIENT_FIELD,
 704                            tmp_buf);
 705
 706         s = client->ibuf;
 707
 708         pid = stream_getl(s);
 709         sprintf(tmp_buf, "%d", pid);
 710         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_SEQID_FIELD,
 711                            tmp_buf);
 712
 713         dst_p.family = stream_getw(s);
 714
 715         if (dst_p.family == AF_INET)
 716                 dst_p.prefixlen = IPV4_MAX_BYTELEN;
 717         else
 718                 dst_p.prefixlen = IPV6_MAX_BYTELEN;
 719
 720         stream_get(&dst_p.u.prefix, s, dst_p.prefixlen);
 721         if (dst_p.family == AF_INET) {
 722                 inet_ntop(AF_INET, &dst_p.u.prefix4, buf, sizeof(buf));
 723                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 724                                    ZEBRA_PTM_BFD_DST_IP_FIELD, buf);
 725         } else {
 726                 inet_ntop(AF_INET6, &dst_p.u.prefix6, buf, sizeof(buf));
 727                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 728                                    ZEBRA_PTM_BFD_DST_IP_FIELD, buf);
 729         }
 730
 731         min_rx_timer = stream_getl(s);
 732         sprintf(tmp_buf, "%d", min_rx_timer);
 733         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_MIN_RX_FIELD,
 734                            tmp_buf);
 735         min_tx_timer = stream_getl(s);
 736         sprintf(tmp_buf, "%d", min_tx_timer);
 737         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_MIN_TX_FIELD,
 738                            tmp_buf);
 739         detect_mul = stream_getc(s);
 740         sprintf(tmp_buf, "%d", detect_mul);
 741         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_DETECT_MULT_FIELD,
 742                            tmp_buf);
 743
 744         multi_hop = stream_getc(s);
 745         if (multi_hop) {
 746                 sprintf(tmp_buf, "%d", 1);
 747                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 748                                    ZEBRA_PTM_BFD_MULTI_HOP_FIELD, tmp_buf);
 749                 src_p.family = stream_getw(s);
 750
 751                 if (src_p.family == AF_INET)
 752                         src_p.prefixlen = IPV4_MAX_BYTELEN;
 753                 else
 754                         src_p.prefixlen = IPV6_MAX_BYTELEN;
 755
 756                 stream_get(&src_p.u.prefix, s, src_p.prefixlen);
 757                 if (src_p.family == AF_INET) {
 758                         inet_ntop(AF_INET, &src_p.u.prefix4, buf, sizeof(buf));
 759                         ptm_lib_append_msg(ptm_hdl, out_ctxt,
 760                                            ZEBRA_PTM_BFD_SRC_IP_FIELD, buf);
 761                 } else {
 762                         inet_ntop(AF_INET6, &src_p.u.prefix6, buf, sizeof(buf));
 763                         ptm_lib_append_msg(ptm_hdl, out_ctxt,
 764                                            ZEBRA_PTM_BFD_SRC_IP_FIELD, buf);
 765                 }
 766
 767                 multi_hop_cnt = stream_getc(s);
 768                 sprintf(tmp_buf, "%d", multi_hop_cnt);
 769                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 770                                    ZEBRA_PTM_BFD_MAX_HOP_CNT_FIELD, tmp_buf);
 771
 772                 if (zvrf_id(zvrf) != VRF_DEFAULT)
 773                         ptm_lib_append_msg(ptm_hdl, out_ctxt,
 774                                            ZEBRA_PTM_BFD_VRF_NAME_FIELD,
 775                                            zvrf_name(zvrf));
 776         } else {
 777                 if (dst_p.family == AF_INET6) {
 778                         src_p.family = stream_getw(s);
 779
 780                         if (src_p.family == AF_INET)
 781                                 src_p.prefixlen = IPV4_MAX_BYTELEN;
 782                         else
 783                                 src_p.prefixlen = IPV6_MAX_BYTELEN;
 784
 785                         stream_get(&src_p.u.prefix, s, src_p.prefixlen);
 786                         if (src_p.family == AF_INET) {
 787                                 inet_ntop(AF_INET, &src_p.u.prefix4, buf,
 788                                           sizeof(buf));
 789                                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 790                                                    ZEBRA_PTM_BFD_SRC_IP_FIELD,
 791                                                    buf);
 792                         } else {
 793                                 inet_ntop(AF_INET6, &src_p.u.prefix6, buf,
 794                                           sizeof(buf));
 795                                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 796                                                    ZEBRA_PTM_BFD_SRC_IP_FIELD,
 797                                                    buf);
 798                         }
 799                 }
 800                 len = stream_getc(s);
 801                 stream_get(if_name, s, len);
 802                 if_name[len] = '\0';
 803
 804                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 805                                    ZEBRA_PTM_BFD_IFNAME_FIELD, if_name);
 806         }
 807
 808         sprintf(tmp_buf, "%d", 1);
 809         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_SEND_EVENT,
 810                            tmp_buf);
 811
 812         ptm_lib_complete_msg(ptm_hdl, out_ctxt, ptm_cb.out_data, &data_len);
 813
 814         if (IS_ZEBRA_DEBUG_SEND)
 815                 zlog_debug("%s: Sent message (%d) %s", __func__, data_len,
 816                            ptm_cb.out_data);
 817         zebra_ptm_send_message(ptm_cb.out_data, data_len);
 818         return 0;
 819 }
 820
 821 /* BFD peer/dst deregister */
 822 int zebra_ptm_bfd_dst_deregister(struct zserv *client, int sock, u_short length,
 823                                  struct zebra_vrf *zvrf)
 824 {
 825         struct stream *s;
 826         struct prefix src_p;
 827         struct prefix dst_p;
 828         u_char multi_hop;
 829         char if_name[INTERFACE_NAMSIZ];
 830         u_char len;
 831         char buf[INET6_ADDRSTRLEN];
 832         char tmp_buf[64];
 833         int data_len = ZEBRA_PTM_SEND_MAX_SOCKBUF;
 834         void *out_ctxt;
 835         unsigned int pid;
 836
 837         client->bfd_peer_del_cnt++;
 838
 839         if (IS_ZEBRA_DEBUG_EVENT)
 840                 zlog_debug("bfd_dst_deregister msg from client %s: length=%d",
 841                            zebra_route_string(client->proto), length);
 842
 843         if (ptm_cb.ptm_sock == -1) {
 844                 ptm_cb.t_timer = NULL;
 845                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 846                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
 847                 return -1;
 848         }
 849
 850         ptm_lib_init_msg(ptm_hdl, 0, PTMLIB_MSG_TYPE_CMD, NULL, &out_ctxt);
 851
 852         sprintf(tmp_buf, "%s", ZEBRA_PTM_BFD_STOP_CMD);
 853         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_CMD_STR, tmp_buf);
 854
 855         sprintf(tmp_buf, "%s", zebra_route_string(client->proto));
 856         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_CLIENT_FIELD,
 857                            tmp_buf);
 858
 859         s = client->ibuf;
 860
 861         pid = stream_getl(s);
 862         sprintf(tmp_buf, "%d", pid);
 863         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_SEQID_FIELD,
 864                            tmp_buf);
 865
 866         dst_p.family = stream_getw(s);
 867
 868         if (dst_p.family == AF_INET)
 869                 dst_p.prefixlen = IPV4_MAX_BYTELEN;
 870         else
 871                 dst_p.prefixlen = IPV6_MAX_BYTELEN;
 872
 873         stream_get(&dst_p.u.prefix, s, dst_p.prefixlen);
 874         if (dst_p.family == AF_INET)
 875                 inet_ntop(AF_INET, &dst_p.u.prefix4, buf, sizeof(buf));
 876         else
 877                 inet_ntop(AF_INET6, &dst_p.u.prefix6, buf, sizeof(buf));
 878         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_DST_IP_FIELD, buf);
 879
 880
 881         multi_hop = stream_getc(s);
 882         if (multi_hop) {
 883                 sprintf(tmp_buf, "%d", 1);
 884                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 885                                    ZEBRA_PTM_BFD_MULTI_HOP_FIELD, tmp_buf);
 886
 887                 src_p.family = stream_getw(s);
 888
 889                 if (src_p.family == AF_INET)
 890                         src_p.prefixlen = IPV4_MAX_BYTELEN;
 891                 else
 892                         src_p.prefixlen = IPV6_MAX_BYTELEN;
 893
 894                 stream_get(&src_p.u.prefix, s, src_p.prefixlen);
 895                 if (src_p.family == AF_INET)
 896                         inet_ntop(AF_INET, &src_p.u.prefix4, buf, sizeof(buf));
 897                 else
 898                         inet_ntop(AF_INET6, &src_p.u.prefix6, buf, sizeof(buf));
 899                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 900                                    ZEBRA_PTM_BFD_SRC_IP_FIELD, buf);
 901
 902                 if (zvrf_id(zvrf) != VRF_DEFAULT)
 903                         ptm_lib_append_msg(ptm_hdl, out_ctxt,
 904                                            ZEBRA_PTM_BFD_VRF_NAME_FIELD,
 905                                            zvrf_name(zvrf));
 906         } else {
 907                 if (dst_p.family == AF_INET6) {
 908                         src_p.family = stream_getw(s);
 909
 910                         if (src_p.family == AF_INET)
 911                                 src_p.prefixlen = IPV4_MAX_BYTELEN;
 912                         else
 913                                 src_p.prefixlen = IPV6_MAX_BYTELEN;
 914
 915                         stream_get(&src_p.u.prefix, s, src_p.prefixlen);
 916                         if (src_p.family == AF_INET) {
 917                                 inet_ntop(AF_INET, &src_p.u.prefix4, buf,
 918                                           sizeof(buf));
 919                                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 920                                                    ZEBRA_PTM_BFD_SRC_IP_FIELD,
 921                                                    buf);
 922                         } else {
 923                                 inet_ntop(AF_INET6, &src_p.u.prefix6, buf,
 924                                           sizeof(buf));
 925                                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 926                                                    ZEBRA_PTM_BFD_SRC_IP_FIELD,
 927                                                    buf);
 928                         }
 929                 }
 930
 931                 len = stream_getc(s);
 932                 stream_get(if_name, s, len);
 933                 if_name[len] = '\0';
 934
 935                 ptm_lib_append_msg(ptm_hdl, out_ctxt,
 936                                    ZEBRA_PTM_BFD_IFNAME_FIELD, if_name);
 937         }
 938
 939         ptm_lib_complete_msg(ptm_hdl, out_ctxt, ptm_cb.out_data, &data_len);
 940         if (IS_ZEBRA_DEBUG_SEND)
 941                 zlog_debug("%s: Sent message (%d) %s", __func__, data_len,
 942                            ptm_cb.out_data);
 943
 944         zebra_ptm_send_message(ptm_cb.out_data, data_len);
 945         return 0;
 946 }
 947
 948 /* BFD client register */
 949 int zebra_ptm_bfd_client_register(struct zserv *client, int sock,
 950                                   u_short length)
 951 {
 952         struct stream *s;
 953         unsigned int pid;
 954         void *out_ctxt;
 955         char tmp_buf[64];
 956         int data_len = ZEBRA_PTM_SEND_MAX_SOCKBUF;
 957
 958         client->bfd_client_reg_cnt++;
 959
 960         if (IS_ZEBRA_DEBUG_EVENT)
 961                 zlog_debug("bfd_client_register msg from client %s: length=%d",
 962                            zebra_route_string(client->proto), length);
 963
 964         s = client->ibuf;
 965         pid = stream_getl(s);
 966
 967         if (ptm_cb.ptm_sock == -1) {
 968                 ptm_cb.t_timer = NULL;
 969                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
 970                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
 971                 return -1;
 972         }
 973
 974         ptm_lib_init_msg(ptm_hdl, 0, PTMLIB_MSG_TYPE_CMD, NULL, &out_ctxt);
 975
 976         sprintf(tmp_buf, "%s", ZEBRA_PTM_BFD_CLIENT_REG_CMD);
 977         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_CMD_STR, tmp_buf);
 978
 979         sprintf(tmp_buf, "%s", zebra_route_string(client->proto));
 980         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_CLIENT_FIELD,
 981                            tmp_buf);
 982
 983         sprintf(tmp_buf, "%d", pid);
 984         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_SEQID_FIELD,
 985                            tmp_buf);
 986
 987         ptm_lib_complete_msg(ptm_hdl, out_ctxt, ptm_cb.out_data, &data_len);
 988
 989         if (IS_ZEBRA_DEBUG_SEND)
 990                 zlog_debug("%s: Sent message (%d) %s", __func__, data_len,
 991                            ptm_cb.out_data);
 992         zebra_ptm_send_message(ptm_cb.out_data, data_len);
 993
 994         SET_FLAG(ptm_cb.client_flags[client->proto],
 995                  ZEBRA_PTM_BFD_CLIENT_FLAG_REG);
 996         return 0;
 997 }
 998
 999 /* BFD client deregister */
1000 void zebra_ptm_bfd_client_deregister(int proto)
1001 {
1002         void *out_ctxt;
1003         char tmp_buf[64];
1004         int data_len = ZEBRA_PTM_SEND_MAX_SOCKBUF;
1005
1006         if (proto != ZEBRA_ROUTE_OSPF && proto != ZEBRA_ROUTE_BGP
1007             && proto != ZEBRA_ROUTE_OSPF6 && proto != ZEBRA_ROUTE_PIM)
1008                 return;
1009
1010         if (IS_ZEBRA_DEBUG_EVENT)
1011                 zlog_err("bfd_client_deregister msg for client %s",
1012                          zebra_route_string(proto));
1013
1014         if (ptm_cb.ptm_sock == -1) {
1015                 ptm_cb.t_timer = NULL;
1016                 thread_add_timer(zebrad.master, zebra_ptm_connect, NULL,
1017                                  ptm_cb.reconnect_time, &ptm_cb.t_timer);
1018                 return;
1019         }
1020
1021         ptm_lib_init_msg(ptm_hdl, 0, PTMLIB_MSG_TYPE_CMD, NULL, &out_ctxt);
1022
1023         sprintf(tmp_buf, "%s", ZEBRA_PTM_BFD_CLIENT_DEREG_CMD);
1024         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_CMD_STR, tmp_buf);
1025
1026         sprintf(tmp_buf, "%s", zebra_route_string(proto));
1027         ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_BFD_CLIENT_FIELD,
1028                            tmp_buf);
1029
1030         ptm_lib_complete_msg(ptm_hdl, out_ctxt, ptm_cb.out_data, &data_len);
1031
1032         if (IS_ZEBRA_DEBUG_SEND)
1033                 zlog_debug("%s: Sent message (%d) %s", __func__, data_len,
1034                            ptm_cb.out_data);
1035
1036         zebra_ptm_send_message(ptm_cb.out_data, data_len);
1037         UNSET_FLAG(ptm_cb.client_flags[proto], ZEBRA_PTM_BFD_CLIENT_FLAG_REG);
1038 }
1039
1040 int zebra_ptm_get_enable_state(void)
1041 {
1042         return ptm_cb.ptm_enable;
1043 }
1044
1045 /*
1046  * zebra_ptm_get_status_str - Convert status to a display string.
1047  */
1048 static const char *zebra_ptm_get_status_str(int status)
1049 {
1050         switch (status) {
1051         case ZEBRA_PTM_STATUS_DOWN:
1052                 return "fail";
1053         case ZEBRA_PTM_STATUS_UP:
1054                 return "pass";
1055         case ZEBRA_PTM_STATUS_UNKNOWN:
1056         default:
1057                 return "n/a";
1058         }
1059 }
1060
1061 void zebra_ptm_show_status(struct vty *vty, struct interface *ifp)
1062 {
1063         vty_out(vty, "  PTM status: ");
1064         if (ifp->ptm_enable) {
1065                 vty_out(vty, "%s\n", zebra_ptm_get_status_str(ifp->ptm_status));
1066         } else {
1067                 vty_out(vty, "disabled\n");
1068         }
1069 }
1070
1071 void zebra_ptm_send_status_req(void)
1072 {
1073         void *out_ctxt;
1074         int len = ZEBRA_PTM_SEND_MAX_SOCKBUF;
1075
1076         if (ptm_cb.ptm_enable) {
1077                 ptm_lib_init_msg(ptm_hdl, 0, PTMLIB_MSG_TYPE_CMD, NULL,
1078                                  &out_ctxt);
1079                 ptm_lib_append_msg(ptm_hdl, out_ctxt, ZEBRA_PTM_CMD_STR,
1080                                    ZEBRA_PTM_GET_STATUS_CMD);
1081                 ptm_lib_complete_msg(ptm_hdl, out_ctxt, ptm_cb.out_data, &len);
1082
1083                 zebra_ptm_send_message(ptm_cb.out_data, len);
1084         }
1085 }
1086
1087 void zebra_ptm_reset_status(int ptm_disable)
1088 {
1089         struct vrf *vrf;
1090         struct interface *ifp;
1091         int send_linkup;
1092
1093         RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id)
1094                 FOR_ALL_INTERFACES (vrf, ifp) {
1095                         send_linkup = 0;
1096                         if (ifp->ptm_enable) {
1097                                 if (!if_is_operative(ifp))
1098                                         send_linkup = 1;
1099
1100                                 if (ptm_disable)
1101                                         ifp->ptm_enable =
1102                                                 ZEBRA_IF_PTM_ENABLE_OFF;
1103                                 ifp->ptm_status = ZEBRA_PTM_STATUS_UNKNOWN;
1104
1105                                 if (if_is_operative(ifp) && send_linkup) {
1106                                         if (IS_ZEBRA_DEBUG_EVENT)
1107                                                 zlog_debug(
1108                                                         "%s: Bringing up interface %s",
1109                                                         __func__, ifp->name);
1110                                         if_up(ifp);
1111                                 }
1112                         }
1113                 }
1114 }
1115
1116 void zebra_ptm_if_init(struct zebra_if *zebra_ifp)
1117 {
1118         zebra_ifp->ptm_enable = ZEBRA_IF_PTM_ENABLE_UNSPEC;
1119 }
1120
1121 void zebra_ptm_if_set_ptm_state(struct interface *ifp,
1122                                 struct zebra_if *zebra_ifp)
1123 {
1124         if (zebra_ifp && zebra_ifp->ptm_enable != ZEBRA_IF_PTM_ENABLE_UNSPEC)
1125                 ifp->ptm_enable = zebra_ifp->ptm_enable;
1126 }
1127
1128 void zebra_ptm_if_write(struct vty *vty, struct zebra_if *zebra_ifp)
1129 {
1130         if (zebra_ifp->ptm_enable == ZEBRA_IF_PTM_ENABLE_OFF)
1131                 vty_out(vty, " no ptm-enable\n");
1132 }