diff options
Diffstat (limited to 'isisd/isis_dynhn.c')
| -rw-r--r-- | isisd/isis_dynhn.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/isisd/isis_dynhn.c b/isisd/isis_dynhn.c new file mode 100644 index 0000000..61c49d0 --- /dev/null +++ b/isisd/isis_dynhn.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * IS-IS Rout(e)ing protocol - isis_dynhn.c + * Dynamic hostname cache + * Copyright (C) 2001,2002 Sampo Saaristo + * Tampere University of Technology + * Institute of Communications Engineering + */ + +#include <zebra.h> + +#include "vty.h" +#include "linklist.h" +#include "memory.h" +#include "log.h" +#include "stream.h" +#include "command.h" +#include "if.h" +#include "frrevent.h" + +#include "isisd/isis_constants.h" +#include "isisd/isis_common.h" +#include "isisd/isis_flags.h" +#include "isisd/isis_circuit.h" +#include "isisd/isisd.h" +#include "isisd/isis_dynhn.h" +#include "isisd/isis_misc.h" +#include "isisd/isis_constants.h" + +DEFINE_MTYPE_STATIC(ISISD, ISIS_DYNHN, "ISIS dyn hostname"); + +static void dyn_cache_cleanup(struct event *); + +void dyn_cache_init(struct isis *isis) +{ + isis->dyn_cache = list_new(); + if (!CHECK_FLAG(im->options, F_ISIS_UNIT_TEST)) + event_add_timer(master, dyn_cache_cleanup, isis, 120, + &isis->t_dync_clean); +} + +void dyn_cache_finish(struct isis *isis) +{ + struct listnode *node, *nnode; + struct isis_dynhn *dyn; + + EVENT_OFF(isis->t_dync_clean); + + for (ALL_LIST_ELEMENTS(isis->dyn_cache, node, nnode, dyn)) { + list_delete_node(isis->dyn_cache, node); + XFREE(MTYPE_ISIS_DYNHN, dyn); + } + + list_delete(&isis->dyn_cache); +} + +static void dyn_cache_cleanup(struct event *thread) +{ + struct listnode *node, *nnode; + struct isis_dynhn *dyn; + time_t now = time(NULL); + struct isis *isis = NULL; + + isis = EVENT_ARG(thread); + + isis->t_dync_clean = NULL; + + for (ALL_LIST_ELEMENTS(isis->dyn_cache, node, nnode, dyn)) { + if ((now - dyn->refresh) < MAX_LSP_LIFETIME) + continue; + list_delete_node(isis->dyn_cache, node); + XFREE(MTYPE_ISIS_DYNHN, dyn); + } + + event_add_timer(master, dyn_cache_cleanup, isis, 120, + &isis->t_dync_clean); +} + +struct isis_dynhn *dynhn_find_by_id(struct isis *isis, const uint8_t *id) +{ + struct listnode *node = NULL; + struct isis_dynhn *dyn = NULL; + + for (ALL_LIST_ELEMENTS_RO(isis->dyn_cache, node, dyn)) + if (memcmp(dyn->id, id, ISIS_SYS_ID_LEN) == 0) + return dyn; + + return NULL; +} + +struct isis_dynhn *dynhn_find_by_name(struct isis *isis, const char *hostname) +{ + struct listnode *node = NULL; + struct isis_dynhn *dyn = NULL; + + for (ALL_LIST_ELEMENTS_RO(isis->dyn_cache, node, dyn)) + if (strncmp(dyn->hostname, hostname, 255) == 0) + return dyn; + + return NULL; +} + +void isis_dynhn_insert(struct isis *isis, const uint8_t *id, + const char *hostname, int level) +{ + struct isis_dynhn *dyn; + + dyn = dynhn_find_by_id(isis, id); + if (!dyn) { + dyn = XCALLOC(MTYPE_ISIS_DYNHN, sizeof(struct isis_dynhn)); + memcpy(dyn->id, id, ISIS_SYS_ID_LEN); + dyn->level = level; + listnode_add(isis->dyn_cache, dyn); + } + + snprintf(dyn->hostname, sizeof(dyn->hostname), "%s", hostname); + dyn->refresh = time(NULL); +} + +void isis_dynhn_remove(struct isis *isis, const uint8_t *id) +{ + struct isis_dynhn *dyn; + + dyn = dynhn_find_by_id(isis, id); + if (!dyn) + return; + listnode_delete(isis->dyn_cache, dyn); + XFREE(MTYPE_ISIS_DYNHN, dyn); +} + +/* + * Level System ID Dynamic Hostname (notag) + * 2 0000.0000.0001 foo-gw + * 2 0000.0000.0002 bar-gw + * * 0000.0000.0004 this-gw + */ +void dynhn_print_all(struct vty *vty, struct isis *isis) +{ + struct listnode *node; + struct isis_dynhn *dyn; + + vty_out(vty, "vrf : %s\n", isis->name); + if (!isis->sysid_set) + return; + vty_out(vty, "Level System ID Dynamic Hostname\n"); + for (ALL_LIST_ELEMENTS_RO(isis->dyn_cache, node, dyn)) { + vty_out(vty, "%-7d", dyn->level); + vty_out(vty, "%pSY %-15s\n", dyn->id, dyn->hostname); + } + + vty_out(vty, " * %pSY %s\n", isis->sysid, cmd_hostname_get()); + return; +} + +struct isis_dynhn *dynhn_snmp_next(struct isis *isis, const uint8_t *id, + int level) +{ + struct listnode *node = NULL; + struct isis_dynhn *dyn = NULL; + struct isis_dynhn *found_dyn = NULL; + int res; + + for (ALL_LIST_ELEMENTS_RO(isis->dyn_cache, node, dyn)) { + res = memcmp(dyn->id, id, ISIS_SYS_ID_LEN); + + if (res < 0) + continue; + + if (res == 0 && dyn->level <= level) + continue; + + if (res == 0) { + /* + * This is the best match, we can stop + * searching + */ + + found_dyn = dyn; + break; + } + + if (found_dyn == NULL + || memcmp(dyn->id, found_dyn->id, ISIS_SYS_ID_LEN) < 0) { + found_dyn = dyn; + } + } + + return found_dyn; +} |