src/lldpd-structs.c

   1 /* -*- mode: c; c-file-style: "openbsd" -*- */
   2 /*
   3  * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx>
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <time.h>
  21 #include "lldpd-structs.h"
  22 #include "log.h"
  23
  24 void
  25 lldpd_chassis_mgmt_cleanup(struct lldpd_chassis *chassis)
  26 {
  27         struct lldpd_mgmt *mgmt, *mgmt_next;
  28
  29         log_debug("alloc", "cleanup management addresses for chassis %s",
  30             chassis->c_name ? chassis->c_name : "(unknown)");
  31
  32         for (mgmt = TAILQ_FIRST(&chassis->c_mgmt);
  33              mgmt != NULL;
  34              mgmt = mgmt_next) {
  35                 mgmt_next = TAILQ_NEXT(mgmt, m_entries);
  36                 free(mgmt);
  37         }
  38         TAILQ_INIT(&chassis->c_mgmt);
  39 }
  40
  41 void
  42 lldpd_chassis_cleanup(struct lldpd_chassis *chassis, int all)
  43 {
  44         lldpd_chassis_mgmt_cleanup(chassis);
  45         log_debug("alloc", "cleanup chassis %s",
  46             chassis->c_name ? chassis->c_name : "(unknown)");
  47 #ifdef ENABLE_LLDPMED
  48         free(chassis->c_med_hw);
  49         free(chassis->c_med_sw);
  50         free(chassis->c_med_fw);
  51         free(chassis->c_med_sn);
  52         free(chassis->c_med_manuf);
  53         free(chassis->c_med_model);
  54         free(chassis->c_med_asset);
  55 #endif
  56         free(chassis->c_id);
  57         free(chassis->c_name);
  58         free(chassis->c_descr);
  59         if (all)
  60                 free(chassis);
  61 }
  62
  63 #ifdef ENABLE_DOT1
  64 void
  65 lldpd_vlan_cleanup(struct lldpd_port *port)
  66 {
  67         struct lldpd_vlan *vlan, *vlan_next;
  68         for (vlan = TAILQ_FIRST(&port->p_vlans);
  69             vlan != NULL;
  70             vlan = vlan_next) {
  71                 free(vlan->v_name);
  72                 vlan_next = TAILQ_NEXT(vlan, v_entries);
  73                 free(vlan);
  74         }
  75         TAILQ_INIT(&port->p_vlans);
  76 }
  77
  78 void
  79 lldpd_ppvid_cleanup(struct lldpd_port *port)
  80 {
  81         struct lldpd_ppvid *ppvid, *ppvid_next;
  82         for (ppvid = TAILQ_FIRST(&port->p_ppvids);
  83             ppvid != NULL;
  84             ppvid = ppvid_next) {
  85                 ppvid_next = TAILQ_NEXT(ppvid, p_entries);
  86                 free(ppvid);
  87         }
  88         TAILQ_INIT(&port->p_ppvids);
  89 }
  90
  91 void
  92 lldpd_pi_cleanup(struct lldpd_port *port)
  93 {
  94         struct lldpd_pi *pi, *pi_next;
  95         for (pi = TAILQ_FIRST(&port->p_pids);
  96             pi != NULL;
  97             pi = pi_next) {
  98                 free(pi->p_pi);
  99                 pi_next = TAILQ_NEXT(pi, p_entries);
 100                 free(pi);
 101         }
 102         TAILQ_INIT(&port->p_pids);
 103 }
 104 #endif
 105
 106 #ifdef ENABLE_CUSTOM
 107 void
 108 lldpd_custom_tlv_add(struct lldpd_port *port, struct lldpd_custom *curr)
 109 {
 110         struct lldpd_custom *custom;
 111
 112         if ((custom = malloc(sizeof(struct lldpd_custom)))) {
 113                 memcpy(custom, curr, sizeof(struct lldpd_custom));
 114                 if ((custom->oui_info = malloc(custom->oui_info_len))) {
 115                         memcpy(custom->oui_info, curr->oui_info, custom->oui_info_len);
 116                         TAILQ_INSERT_TAIL(&port->p_custom_list, custom, next);
 117                 } else {
 118                         free(custom);
 119                         log_warn("rpc", "could not allocate memory for custom TLV info");
 120                 }
 121         }
 122 }
 123
 124 void
 125 lldpd_custom_tlv_cleanup(struct lldpd_port *port, struct lldpd_custom *curr)
 126 {
 127         struct lldpd_custom *custom, *custom_next;
 128         for (custom = TAILQ_FIRST(&port->p_custom_list);
 129             custom != NULL;
 130             custom = custom_next) {
 131                 custom_next = TAILQ_NEXT(custom, next);
 132                 if (!memcmp(curr->oui, custom->oui, sizeof(curr->oui)) &&
 133                     curr->subtype == custom->subtype) {
 134                         TAILQ_REMOVE(&port->p_custom_list, custom, next);
 135                         free(custom->oui_info);
 136                         free(custom);
 137                 }
 138         }
 139 }
 140
 141 void
 142 lldpd_custom_list_cleanup(struct lldpd_port *port)
 143 {
 144         struct lldpd_custom *custom, *custom_next;
 145         for (custom = TAILQ_FIRST(&port->p_custom_list);
 146             custom != NULL;
 147             custom = custom_next) {
 148                 custom_next = TAILQ_NEXT(custom, next);
 149                 free(custom->oui_info);
 150                 free(custom);
 151         }
 152         TAILQ_INIT(&port->p_custom_list);
 153 }
 154 #endif
 155
 156 /* Cleanup a remote port. The before last argument, `expire` is a function that
 157  * should be called when a remote port is removed. If the last argument is 1,
 158  * all remote ports are removed.
 159  */
 160 void
 161 lldpd_remote_cleanup(struct lldpd_hardware *hardware,
 162     void(*expire)(struct lldpd_hardware *, struct lldpd_port *),
 163     int all)
 164 {
 165         struct lldpd_port *port, *port_next;
 166         int del;
 167         time_t now = time(NULL);
 168
 169         log_debug("alloc", "cleanup remote port on %s",
 170             hardware->h_ifname);
 171         for (port = TAILQ_FIRST(&hardware->h_rports);
 172              port != NULL;
 173              port = port_next) {
 174                 port_next = TAILQ_NEXT(port, p_entries);
 175                 del = all;
 176                 if (!all && expire &&
 177                     (now >= port->p_lastupdate + port->p_ttl)) {
 178                         if (port->p_ttl > 0) hardware->h_ageout_cnt++;
 179                         del = 1;
 180                 }
 181                 if (del) {
 182                         if (expire) expire(hardware, port);
 183                         /* This TAILQ_REMOVE is dangerous. It should not be
 184                          * called while in liblldpctl because we don't have a
 185                          * real list. It is only needed to be called when we
 186                          * don't delete the entire list. */
 187                         if (!all) TAILQ_REMOVE(&hardware->h_rports, port, p_entries);
 188
 189                         hardware->h_delete_cnt++;
 190                         /* Register last removal to be able to report lldpStatsRemTablesLastChangeTime */
 191                         hardware->h_lport.p_lastremove = time(NULL);
 192                         lldpd_port_cleanup(port, 1);
 193                         free(port);
 194                 }
 195         }
 196         if (all) TAILQ_INIT(&hardware->h_rports);
 197 }
 198
 199 /* If `all' is true, clear all information, including information that
 200    are not refreshed periodically. Port should be freed manually. */
 201 void
 202 lldpd_port_cleanup(struct lldpd_port *port, int all)
 203 {
 204 #ifdef ENABLE_LLDPMED
 205         int i;
 206         if (all)
 207                 for (i=0; i < LLDP_MED_LOCFORMAT_LAST; i++)
 208                         free(port->p_med_location[i].data);
 209 #endif
 210 #ifdef ENABLE_DOT1
 211         lldpd_vlan_cleanup(port);
 212         lldpd_ppvid_cleanup(port);
 213         lldpd_pi_cleanup(port);
 214 #endif
 215         /* will set these to NULL so we don't free wrong memory */
 216
 217         if (all) {
 218                 free(port->p_id);
 219                 port->p_id = NULL;
 220                 free(port->p_descr);
 221                 port->p_descr = NULL;
 222                 free(port->p_lastframe);
 223                 if (port->p_chassis) { /* chassis may not have been attributed, yet */
 224                         port->p_chassis->c_refcount--;
 225                         port->p_chassis = NULL;
 226                 }
 227 #ifdef ENABLE_CUSTOM
 228                 lldpd_custom_list_cleanup(port);
 229 #endif
 230         }
 231 }
 232
 233 void
 234 lldpd_config_cleanup(struct lldpd_config *config)
 235 {
 236         log_debug("alloc", "general configuration cleanup");
 237         free(config->c_mgmt_pattern);
 238         free(config->c_cid_pattern);
 239         free(config->c_cid_string);
 240         free(config->c_iface_pattern);
 241         free(config->c_perm_ifaces);
 242         free(config->c_hostname);
 243         free(config->c_platform);
 244         free(config->c_description);
 245 }