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Commit | Line | Data |
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718e3744 | 1 | /* |
2 | * Kernel routing table read by sysctl function. | |
3 | * Copyright (C) 1997, 98 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "memory.h" | |
26 | #include "log.h" | |
27 | ||
6621ca86 | 28 | #include "zebra/zserv.h" |
29 | #include "zebra/rt.h" | |
ec1a4283 | 30 | #include "zebra/kernel_socket.h" |
6621ca86 | 31 | |
718e3744 | 32 | /* Kernel routing table read up by sysctl function. */ |
6621ca86 | 33 | void |
34 | route_read (void) | |
718e3744 | 35 | { |
36 | caddr_t buf, end, ref; | |
37 | size_t bufsiz; | |
38 | struct rt_msghdr *rtm; | |
718e3744 | 39 | |
40 | #define MIBSIZ 6 | |
41 | int mib[MIBSIZ] = | |
42 | { | |
43 | CTL_NET, | |
44 | PF_ROUTE, | |
45 | 0, | |
46 | 0, | |
47 | NET_RT_DUMP, | |
48 | 0 | |
49 | }; | |
50 | ||
51 | /* Get buffer size. */ | |
52 | if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) | |
53 | { | |
6099b3b5 | 54 | zlog_warn ("sysctl fail: %s", safe_strerror (errno)); |
ec1a4283 | 55 | return; |
718e3744 | 56 | } |
57 | ||
58 | /* Allocate buffer. */ | |
59 | ref = buf = XMALLOC (MTYPE_TMP, bufsiz); | |
60 | ||
61 | /* Read routing table information by calling sysctl(). */ | |
62 | if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) | |
63 | { | |
6099b3b5 | 64 | zlog_warn ("sysctl() fail by %s", safe_strerror (errno)); |
ec1a4283 | 65 | return; |
718e3744 | 66 | } |
67 | ||
68 | for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen) | |
69 | { | |
70 | rtm = (struct rt_msghdr *) buf; | |
71 | rtm_read (rtm); | |
72 | } | |
73 | ||
74 | /* Free buffer. */ | |
75 | XFREE (MTYPE_TMP, ref); | |
76 | ||
ec1a4283 | 77 | return; |
718e3744 | 78 | } |