vtysh/vtysh_config.c

   1 /* Configuration generator.
   2  * Copyright (C) 2000 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
  23 #include "command.h"
  24 #include "linklist.h"
  25 #include "memory.h"
  26
  27 #include "vtysh/vtysh.h"
  28 #include "vtysh/vtysh_user.h"
  29
  30 DEFINE_MGROUP(MVTYSH, "vtysh")
  31 DEFINE_MTYPE_STATIC(MVTYSH, VTYSH_CONFIG, "Vtysh configuration")
  32 DEFINE_MTYPE_STATIC(MVTYSH, VTYSH_CONFIG_LINE, "Vtysh configuration line")
  33
  34 vector configvec;
  35
  36 struct config {
  37         /* Configuration node name. */
  38         char *name;
  39
  40         /* Configuration string line. */
  41         struct list *line;
  42
  43         /* Configuration can be nest. */
  44         struct config *config;
  45
  46         /* Index of this config. */
  47         uint32_t index;
  48 };
  49
  50 struct list *config_top;
  51
  52 static int line_cmp(char *c1, char *c2)
  53 {
  54         return strcmp(c1, c2);
  55 }
  56
  57 static void line_del(char *line)
  58 {
  59         XFREE(MTYPE_VTYSH_CONFIG_LINE, line);
  60 }
  61
  62 static struct config *config_new(void)
  63 {
  64         struct config *config;
  65         config = XCALLOC(MTYPE_VTYSH_CONFIG, sizeof(struct config));
  66         return config;
  67 }
  68
  69 static int config_cmp(struct config *c1, struct config *c2)
  70 {
  71         return strcmp(c1->name, c2->name);
  72 }
  73
  74 static void config_del(struct config *config)
  75 {
  76         list_delete_and_null(&config->line);
  77         if (config->name)
  78                 XFREE(MTYPE_VTYSH_CONFIG_LINE, config->name);
  79         XFREE(MTYPE_VTYSH_CONFIG, config);
  80 }
  81
  82 static struct config *config_get(int index, const char *line)
  83 {
  84         struct config *config;
  85         struct config *config_loop;
  86         struct list *master;
  87         struct listnode *node, *nnode;
  88
  89         config = config_loop = NULL;
  90
  91         master = vector_lookup_ensure(configvec, index);
  92
  93         if (!master) {
  94                 master = list_new();
  95                 master->del = (void (*)(void *))config_del;
  96                 master->cmp = (int (*)(void *, void *))config_cmp;
  97                 vector_set_index(configvec, index, master);
  98         }
  99
 100         for (ALL_LIST_ELEMENTS(master, node, nnode, config_loop)) {
 101                 if (strcmp(config_loop->name, line) == 0)
 102                         config = config_loop;
 103         }
 104
 105         if (!config) {
 106                 config = config_new();
 107                 config->line = list_new();
 108                 config->line->del = (void (*)(void *))line_del;
 109                 config->line->cmp = (int (*)(void *, void *))line_cmp;
 110                 config->name = XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line);
 111                 config->index = index;
 112                 listnode_add(master, config);
 113         }
 114         return config;
 115 }
 116
 117 void config_add_line(struct list *config, const char *line)
 118 {
 119         listnode_add(config, XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line));
 120 }
 121
 122 static void config_add_line_uniq(struct list *config, const char *line)
 123 {
 124         struct listnode *node, *nnode;
 125         char *pnt;
 126
 127         for (ALL_LIST_ELEMENTS(config, node, nnode, pnt)) {
 128                 if (strcmp(pnt, line) == 0)
 129                         return;
 130         }
 131         listnode_add_sort(config, XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line));
 132 }
 133
 134 /*
 135  * I want to explicitly move this command to the end of the line
 136  */
 137 static void config_add_line_end(struct list *config, const char *line)
 138 {
 139         struct listnode *node;
 140         void *item = XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line);
 141
 142         listnode_add(config, item);
 143         node = listnode_lookup(config, item);
 144         if (node)
 145                 listnode_move_to_tail(config, node);
 146 }
 147
 148 void vtysh_config_parse_line(void *arg, const char *line)
 149 {
 150         char c;
 151         static struct config *config = NULL;
 152
 153         if (!line)
 154                 return;
 155
 156         c = line[0];
 157
 158         if (c == '\0')
 159                 return;
 160
 161         /* printf ("[%s]\n", line); */
 162
 163         switch (c) {
 164         /* Suppress exclamation points ! and commented lines. The !s are
 165          * generated
 166          * dynamically in vtysh_config_dump() */
 167         case '!':
 168         case '#':
 169                 break;
 170         case ' ':
 171                 /* Store line to current configuration. */
 172                 if (config) {
 173                         if (strncmp(line, " link-params",
 174                                     strlen(" link-params"))
 175                             == 0) {
 176                                 config_add_line(config->line, line);
 177                                 config->index = LINK_PARAMS_NODE;
 178                         } else if (strncmp(line, " ip multicast boundary",
 179                                            strlen(" ip multicast boundary"))
 180                                    == 0) {
 181                                 config_add_line_end(config->line, line);
 182                         } else if (config->index == LINK_PARAMS_NODE
 183                                    && strncmp(line, "  exit-link-params",
 184                                               strlen("  exit"))
 185                                               == 0) {
 186                                 config_add_line(config->line, line);
 187                                 config->index = INTERFACE_NODE;
 188                         } else if (config->index == RMAP_NODE
 189                                    || config->index == INTERFACE_NODE
 190                                    || config->index == LOGICALROUTER_NODE
 191                                    || config->index == VTY_NODE
 192                                    || config->index == VRF_NODE)
 193                                 config_add_line_uniq(config->line, line);
 194                         else
 195                                 config_add_line(config->line, line);
 196                 } else
 197                         config_add_line(config_top, line);
 198                 break;
 199         default:
 200                 if (strncmp(line, "interface", strlen("interface")) == 0)
 201                         config = config_get(INTERFACE_NODE, line);
 202                 else if (strncmp(line, "pseudowire", strlen("pseudowire")) == 0)
 203                         config = config_get(PW_NODE, line);
 204                 else if (strncmp(line, "logical-router", strlen("logical-router")) == 0)
 205                         config = config_get(LOGICALROUTER_NODE, line);
 206                 else if (strncmp(line, "vrf", strlen("vrf")) == 0)
 207                         config = config_get(VRF_NODE, line);
 208                 else if (strncmp(line, "nexthop-group", strlen("nexthop-group"))
 209                          == 0)
 210                         config = config_get(NH_GROUP_NODE, line);
 211                 else if (strncmp(line, "router-id", strlen("router-id")) == 0)
 212                         config = config_get(ZEBRA_NODE, line);
 213                 else if (strncmp(line, "router rip", strlen("router rip")) == 0)
 214                         config = config_get(RIP_NODE, line);
 215                 else if (strncmp(line, "router ripng", strlen("router ripng"))
 216                          == 0)
 217                         config = config_get(RIPNG_NODE, line);
 218                 else if (strncmp(line, "router eigrp", strlen("router eigrp"))
 219                          == 0)
 220                         config = config_get(EIGRP_NODE, line);
 221                 else if (strncmp(line, "router babel", strlen("router babel"))
 222                          == 0)
 223                         config = config_get(BABEL_NODE, line);
 224                 else if (strncmp(line, "router ospf", strlen("router ospf"))
 225                          == 0)
 226                         config = config_get(OSPF_NODE, line);
 227                 else if (strncmp(line, "router ospf6", strlen("router ospf6"))
 228                          == 0)
 229                         config = config_get(OSPF6_NODE, line);
 230                 else if (strncmp(line, "mpls ldp", strlen("mpls ldp")) == 0)
 231                         config = config_get(LDP_NODE, line);
 232                 else if (strncmp(line, "l2vpn", strlen("l2vpn")) == 0)
 233                         config = config_get(LDP_L2VPN_NODE, line);
 234                 else if (strncmp(line, "router bgp", strlen("router bgp")) == 0)
 235                         config = config_get(BGP_NODE, line);
 236                 else if (strncmp(line, "router isis", strlen("router isis"))
 237                          == 0)
 238                         config = config_get(ISIS_NODE, line);
 239                 else if (strncmp(line, "route-map", strlen("route-map")) == 0)
 240                         config = config_get(RMAP_NODE, line);
 241                 else if (strncmp(line, "pbr-map", strlen("pbr-map")) == 0)
 242                         config = config_get(PBRMAP_NODE, line);
 243                 else if (strncmp(line, "access-list", strlen("access-list"))
 244                          == 0)
 245                         config = config_get(ACCESS_NODE, line);
 246                 else if (strncmp(line, "ipv6 access-list",
 247                                  strlen("ipv6 access-list"))
 248                          == 0)
 249                         config = config_get(ACCESS_IPV6_NODE, line);
 250                 else if (strncmp(line, "mac access-list",
 251                                  strlen("mac access-list"))
 252                          == 0)
 253                         config = config_get(ACCESS_MAC_NODE, line);
 254                 else if (strncmp(line, "ip prefix-list",
 255                                  strlen("ip prefix-list"))
 256                          == 0)
 257                         config = config_get(PREFIX_NODE, line);
 258                 else if (strncmp(line, "ipv6 prefix-list",
 259                                  strlen("ipv6 prefix-list"))
 260                          == 0)
 261                         config = config_get(PREFIX_IPV6_NODE, line);
 262                 else if (strncmp(line, "ip as-path access-list",
 263                                  strlen("ip as-path access-list"))
 264                          == 0)
 265                         config = config_get(AS_LIST_NODE, line);
 266                 else if (strncmp(line, "ip community-list",
 267                                  strlen("ip community-list"))
 268                                  == 0
 269                          || strncmp(line, "ip extcommunity-list",
 270                                     strlen("ip extcommunity-list"))
 271                                     == 0
 272                          || strncmp(line, "ip large-community-list",
 273                                     strlen("ip large-community-list"))
 274                                     == 0)
 275                         config = config_get(COMMUNITY_LIST_NODE, line);
 276                 else if (strncmp(line, "ip route", strlen("ip route")) == 0)
 277                         config = config_get(IP_NODE, line);
 278                 else if (strncmp(line, "ipv6 route", strlen("ipv6 route")) == 0)
 279                         config = config_get(IP_NODE, line);
 280                 else if (strncmp(line, "key", strlen("key")) == 0)
 281                         config = config_get(KEYCHAIN_NODE, line);
 282                 else if (strncmp(line, "line", strlen("line")) == 0)
 283                         config = config_get(VTY_NODE, line);
 284                 else if ((strncmp(line, "ipv6 forwarding",
 285                                   strlen("ipv6 forwarding"))
 286                           == 0)
 287                          || (strncmp(line, "ip forwarding",
 288                                      strlen("ip forwarding"))
 289                              == 0))
 290                         config = config_get(FORWARDING_NODE, line);
 291                 else if (strncmp(line, "debug vrf", strlen("debug vrf")) == 0)
 292                         config = config_get(VRF_DEBUG_NODE, line);
 293                 else if (strncmp(line, "debug", strlen("debug")) == 0)
 294                         config = config_get(DEBUG_NODE, line);
 295                 else if (strncmp(line, "password", strlen("password")) == 0
 296                          || strncmp(line, "enable password",
 297                                     strlen("enable password"))
 298                                     == 0)
 299                         config = config_get(AAA_NODE, line);
 300                 else if (strncmp(line, "ip protocol", strlen("ip protocol"))
 301                          == 0)
 302                         config = config_get(PROTOCOL_NODE, line);
 303                 else if (strncmp(line, "ipv6 protocol", strlen("ipv6 protocol"))
 304                          == 0)
 305                         config = config_get(PROTOCOL_NODE, line);
 306                 else if (strncmp(line, "ip nht", strlen("ip nht")) == 0)
 307                         config = config_get(PROTOCOL_NODE, line);
 308                 else if (strncmp(line, "ipv6 nht", strlen("ipv6 nht")) == 0)
 309                         config = config_get(PROTOCOL_NODE, line);
 310                 else if (strncmp(line, "mpls", strlen("mpls")) == 0)
 311                         config = config_get(MPLS_NODE, line);
 312                 else {
 313                         if (strncmp(line, "log", strlen("log")) == 0
 314                             || strncmp(line, "hostname", strlen("hostname"))
 315                                        == 0
 316                             || strncmp(line, "frr", strlen("frr")) == 0
 317                             || strncmp(line, "agentx", strlen("agentx")) == 0
 318                             || strncmp(line, "no log", strlen("no log")) == 0)
 319                                 config_add_line_uniq(config_top, line);
 320                         else
 321                                 config_add_line(config_top, line);
 322                         config = NULL;
 323                 }
 324                 break;
 325         }
 326 }
 327
 328 /* Macro to check delimiter is needed between each configuration line
 329  * or not. */
 330 #define NO_DELIMITER(I)                                                        \
 331         ((I) == ACCESS_NODE || (I) == PREFIX_NODE || (I) == IP_NODE            \
 332          || (I) == AS_LIST_NODE || (I) == COMMUNITY_LIST_NODE                  \
 333          || (I) == ACCESS_IPV6_NODE || (I) == ACCESS_MAC_NODE                  \
 334          || (I) == PREFIX_IPV6_NODE || (I) == FORWARDING_NODE                  \
 335          || (I) == DEBUG_NODE || (I) == AAA_NODE || (I) == VRF_DEBUG_NODE      \
 336          || (I) == MPLS_NODE)
 337
 338 /* Display configuration to file pointer. */
 339 void vtysh_config_dump(FILE *fp)
 340 {
 341         struct listnode *node, *nnode;
 342         struct listnode *mnode, *mnnode;
 343         struct config *config;
 344         struct list *master;
 345         char *line;
 346         unsigned int i;
 347
 348         for (ALL_LIST_ELEMENTS(config_top, node, nnode, line)) {
 349                 fprintf(fp, "%s\n", line);
 350                 fflush(fp);
 351         }
 352         fprintf(fp, "!\n");
 353         fflush(fp);
 354
 355         for (i = 0; i < vector_active(configvec); i++)
 356                 if ((master = vector_slot(configvec, i)) != NULL) {
 357                         for (ALL_LIST_ELEMENTS(master, node, nnode, config)) {
 358                                 /* Don't print empty sections for interface.
 359                                  * Route maps on the
 360                                  * other hand could have a legitimate empty
 361                                  * section at the end.
 362                                  * VRF is handled in the backend, we could have
 363                                  * "configured" VRFs with static routes which
 364                                  * are not under the VRF node.
 365                                  */
 366                                 if (config->index == INTERFACE_NODE
 367                                     && list_isempty(config->line))
 368                                         continue;
 369
 370                                 fprintf(fp, "%s\n", config->name);
 371                                 fflush(fp);
 372
 373                                 for (ALL_LIST_ELEMENTS(config->line, mnode,
 374                                                        mnnode, line)) {
 375                                         fprintf(fp, "%s\n", line);
 376                                         fflush(fp);
 377                                 }
 378                                 if (!NO_DELIMITER(i)) {
 379                                         fprintf(fp, "!\n");
 380                                         fflush(fp);
 381                                 }
 382                         }
 383                         if (NO_DELIMITER(i)) {
 384                                 fprintf(fp, "!\n");
 385                                 fflush(fp);
 386                         }
 387                 }
 388
 389         for (i = 0; i < vector_active(configvec); i++)
 390                 if ((master = vector_slot(configvec, i)) != NULL) {
 391                         list_delete_and_null(&master);
 392                         vector_slot(configvec, i) = NULL;
 393                 }
 394         list_delete_all_node(config_top);
 395 }
 396
 397 /* Read up configuration file from file_name. */
 398 static int vtysh_read_file(FILE *confp)
 399 {
 400         struct vty *vty;
 401         int ret;
 402
 403         vty = vty_new();
 404         vty->wfd = STDERR_FILENO;
 405         vty->type = VTY_TERM;
 406         vty->node = CONFIG_NODE;
 407
 408         vtysh_execute_no_pager("enable");
 409         vtysh_execute_no_pager("configure terminal");
 410
 411         /* Execute configuration file. */
 412         ret = vtysh_config_from_file(vty, confp);
 413
 414         vtysh_execute_no_pager("end");
 415         vtysh_execute_no_pager("disable");
 416
 417         vty_close(vty);
 418
 419         return (ret);
 420 }
 421
 422 /* Read up configuration file from config_default_dir. */
 423 int vtysh_read_config(const char *config_default_dir)
 424 {
 425         FILE *confp = NULL;
 426         int ret;
 427
 428         confp = fopen(config_default_dir, "r");
 429         if (confp == NULL) {
 430                 fprintf(stderr,
 431                         "%% Can't open configuration file %s due to '%s'.\n",
 432                         config_default_dir, safe_strerror(errno));
 433                 return (CMD_ERR_NO_FILE);
 434         }
 435
 436         ret = vtysh_read_file(confp);
 437         fclose(confp);
 438
 439         return (ret);
 440 }
 441
 442 /* We don't write vtysh specific into file from vtysh. vtysh.conf should
 443  * be edited by hand. So, we handle only "write terminal" case here and
 444  * integrate vtysh specific conf with conf from daemons.
 445  */
 446 void vtysh_config_write()
 447 {
 448         char line[81];
 449
 450         if (cmd_hostname_get()) {
 451                 sprintf(line, "hostname %s", cmd_hostname_get());
 452                 vtysh_config_parse_line(NULL, line);
 453         }
 454
 455         if (cmd_domainname_get()) {
 456                 sprintf(line, "domainname %s", cmd_domainname_get());
 457                 vtysh_config_parse_line(NULL, line);
 458         }
 459         if (vtysh_write_integrated == WRITE_INTEGRATED_NO)
 460                 vtysh_config_parse_line(NULL,
 461                                         "no service integrated-vtysh-config");
 462         if (vtysh_write_integrated == WRITE_INTEGRATED_YES)
 463                 vtysh_config_parse_line(NULL,
 464                                         "service integrated-vtysh-config");
 465
 466         user_config_write();
 467 }
 468
 469 void vtysh_config_init()
 470 {
 471         config_top = list_new();
 472         config_top->del = (void (*)(void *))line_del;
 473         configvec = vector_init(1);
 474 }