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eb5d44eb | 1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_dynhn.c | |
3 | * Dynamic hostname cache | |
4 | * Copyright (C) 2001,2002 Sampo Saaristo | |
d62a17ae | 5 | * Tampere University of Technology |
eb5d44eb | 6 | * Institute of Communications Engineering |
7 | * | |
d62a17ae | 8 | * This program is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU General Public Licenseas published by the Free | |
10 | * Software Foundation; either version 2 of the License, or (at your option) | |
eb5d44eb | 11 | * any later version. |
12 | * | |
d62a17ae | 13 | * This program is distributed in the hope that it will be useful,but WITHOUT |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
eb5d44eb | 16 | * more details. |
17 | * | |
896014f4 DL |
18 | * You should have received a copy of the GNU General Public License along |
19 | * with this program; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
eb5d44eb | 21 | */ |
22 | ||
eb5d44eb | 23 | #include <zebra.h> |
eb5d44eb | 24 | |
25 | #include "vty.h" | |
26 | #include "linklist.h" | |
27 | #include "memory.h" | |
28 | #include "log.h" | |
29 | #include "stream.h" | |
30 | #include "command.h" | |
31 | #include "if.h" | |
d3d7474b | 32 | #include "thread.h" |
eb5d44eb | 33 | |
eb5d44eb | 34 | #include "isisd/isis_constants.h" |
35 | #include "isisd/isis_common.h" | |
36 | #include "isisd/isis_flags.h" | |
37 | #include "isisd/isis_circuit.h" | |
38 | #include "isisd/isisd.h" | |
39 | #include "isisd/isis_dynhn.h" | |
40 | #include "isisd/isis_misc.h" | |
41 | #include "isisd/isis_constants.h" | |
42 | ||
66b9a381 DL |
43 | DEFINE_MTYPE_STATIC(ISISD, ISIS_DYNHN, "ISIS dyn hostname"); |
44 | ||
eb5d44eb | 45 | extern struct host host; |
46 | ||
47 | struct list *dyn_cache = NULL; | |
d62a17ae | 48 | static int dyn_cache_cleanup(struct thread *); |
eb5d44eb | 49 | |
eab88f36 | 50 | void dyn_cache_init(struct isis *isis) |
eb5d44eb | 51 | { |
d62a17ae | 52 | if (dyn_cache == NULL) |
53 | dyn_cache = list_new(); | |
52a7c25e RW |
54 | if (!CHECK_FLAG(im->options, F_ISIS_UNIT_TEST)) |
55 | thread_add_timer(master, dyn_cache_cleanup, isis, 120, | |
56 | &isis->t_dync_clean); | |
d62a17ae | 57 | return; |
eb5d44eb | 58 | } |
59 | ||
52a7c25e RW |
60 | void dyn_cache_cleanup_all(void) |
61 | { | |
62 | struct listnode *node, *nnode; | |
63 | struct isis_dynhn *dyn; | |
64 | ||
65 | for (ALL_LIST_ELEMENTS(dyn_cache, node, nnode, dyn)) { | |
66 | list_delete_node(dyn_cache, node); | |
67 | XFREE(MTYPE_ISIS_DYNHN, dyn); | |
68 | } | |
69 | } | |
70 | ||
d62a17ae | 71 | static int dyn_cache_cleanup(struct thread *thread) |
d3d7474b | 72 | { |
d62a17ae | 73 | struct listnode *node, *nnode; |
74 | struct isis_dynhn *dyn; | |
75 | time_t now = time(NULL); | |
eab88f36 K |
76 | struct isis *isis = NULL; |
77 | ||
78 | isis = THREAD_ARG(thread); | |
d3d7474b | 79 | |
d62a17ae | 80 | isis->t_dync_clean = NULL; |
d3d7474b | 81 | |
d62a17ae | 82 | for (ALL_LIST_ELEMENTS(dyn_cache, node, nnode, dyn)) { |
83 | if ((now - dyn->refresh) < MAX_LSP_LIFETIME) | |
84 | continue; | |
d62a17ae | 85 | list_delete_node(dyn_cache, node); |
86 | XFREE(MTYPE_ISIS_DYNHN, dyn); | |
87 | } | |
d3d7474b | 88 | |
eab88f36 K |
89 | thread_add_timer(master, dyn_cache_cleanup, isis, 120, |
90 | &isis->t_dync_clean); | |
91 | ||
d62a17ae | 92 | return ISIS_OK; |
d3d7474b | 93 | } |
94 | ||
d7c0a89a | 95 | struct isis_dynhn *dynhn_find_by_id(const uint8_t *id) |
eb5d44eb | 96 | { |
d62a17ae | 97 | struct listnode *node = NULL; |
98 | struct isis_dynhn *dyn = NULL; | |
eb5d44eb | 99 | |
d62a17ae | 100 | for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn)) |
101 | if (memcmp(dyn->id, id, ISIS_SYS_ID_LEN) == 0) | |
102 | return dyn; | |
f390d2c7 | 103 | |
d62a17ae | 104 | return NULL; |
eb5d44eb | 105 | } |
106 | ||
d62a17ae | 107 | struct isis_dynhn *dynhn_find_by_name(const char *hostname) |
3f045a08 | 108 | { |
d62a17ae | 109 | struct listnode *node = NULL; |
110 | struct isis_dynhn *dyn = NULL; | |
3f045a08 | 111 | |
d62a17ae | 112 | for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn)) |
af8ac8f9 | 113 | if (strncmp(dyn->hostname, hostname, 255) == 0) |
d62a17ae | 114 | return dyn; |
3f045a08 | 115 | |
d62a17ae | 116 | return NULL; |
3f045a08 JB |
117 | } |
118 | ||
d7c0a89a | 119 | void isis_dynhn_insert(const uint8_t *id, const char *hostname, int level) |
eb5d44eb | 120 | { |
d62a17ae | 121 | struct isis_dynhn *dyn; |
122 | ||
123 | dyn = dynhn_find_by_id(id); | |
d62a17ae | 124 | if (!dyn) { |
af8ac8f9 CF |
125 | dyn = XCALLOC(MTYPE_ISIS_DYNHN, sizeof(struct isis_dynhn)); |
126 | memcpy(dyn->id, id, ISIS_SYS_ID_LEN); | |
127 | dyn->level = level; | |
128 | listnode_add(dyn_cache, dyn); | |
d62a17ae | 129 | } |
130 | ||
af8ac8f9 | 131 | snprintf(dyn->hostname, sizeof(dyn->hostname), "%s", hostname); |
d62a17ae | 132 | dyn->refresh = time(NULL); |
eb5d44eb | 133 | } |
134 | ||
d7c0a89a | 135 | void isis_dynhn_remove(const uint8_t *id) |
3f045a08 | 136 | { |
d62a17ae | 137 | struct isis_dynhn *dyn; |
138 | ||
139 | dyn = dynhn_find_by_id(id); | |
140 | if (!dyn) | |
141 | return; | |
142 | listnode_delete(dyn_cache, dyn); | |
143 | XFREE(MTYPE_ISIS_DYNHN, dyn); | |
3f045a08 JB |
144 | } |
145 | ||
eb5d44eb | 146 | /* |
147 | * Level System ID Dynamic Hostname (notag) | |
148 | * 2 0000.0000.0001 foo-gw | |
149 | * 2 0000.0000.0002 bar-gw | |
150 | * * 0000.0000.0004 this-gw | |
151 | */ | |
eab88f36 | 152 | void dynhn_print_all(struct vty *vty, struct isis *isis) |
eb5d44eb | 153 | { |
d62a17ae | 154 | struct listnode *node; |
155 | struct isis_dynhn *dyn; | |
156 | ||
eab88f36 K |
157 | vty_out(vty, "vrf : %s\n", isis->name); |
158 | if (!isis->sysid_set) | |
159 | return; | |
d62a17ae | 160 | vty_out(vty, "Level System ID Dynamic Hostname\n"); |
161 | for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn)) { | |
162 | vty_out(vty, "%-7d", dyn->level); | |
163 | vty_out(vty, "%-15s%-15s\n", sysid_print(dyn->id), | |
af8ac8f9 | 164 | dyn->hostname); |
d62a17ae | 165 | } |
166 | ||
167 | vty_out(vty, " * %s %s\n", sysid_print(isis->sysid), | |
6b3ee3a0 | 168 | cmd_hostname_get()); |
d62a17ae | 169 | return; |
eb5d44eb | 170 | } |
1ee746d9 | 171 | |
172 | struct isis_dynhn *dynhn_snmp_next(const uint8_t *id, int level) | |
173 | { | |
174 | struct listnode *node = NULL; | |
175 | struct isis_dynhn *dyn = NULL; | |
176 | struct isis_dynhn *found_dyn = NULL; | |
177 | int res; | |
178 | ||
179 | for (ALL_LIST_ELEMENTS_RO(dyn_cache, node, dyn)) { | |
180 | res = memcmp(dyn->id, id, ISIS_SYS_ID_LEN); | |
181 | ||
182 | if (res < 0) | |
183 | continue; | |
184 | ||
185 | if (res == 0 && dyn->level <= level) | |
186 | continue; | |
187 | ||
188 | if (res == 0) { | |
189 | /* | |
190 | * This is the best match, we can stop | |
191 | * searching | |
192 | */ | |
193 | ||
194 | found_dyn = dyn; | |
195 | break; | |
196 | } | |
197 | ||
198 | if (found_dyn == NULL | |
199 | || memcmp(dyn->id, found_dyn->id, ISIS_SYS_ID_LEN) < 0) { | |
200 | found_dyn = dyn; | |
201 | } | |
202 | } | |
203 | ||
204 | return found_dyn; | |
205 | } |