1/*
2 * Get interface's address and mask information 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 "if.h"
26#include "sockunion.h"
27#include "prefix.h"
28#include "connected.h"
29#include "memory.h"
30#include "ioctl.h"
31#include "log.h"
32
33int
34ifstat_update_sysctl ()
35{
36  caddr_t ref, buf, end;
37  size_t bufsiz;
38  struct if_msghdr *ifm;
39  struct interface *ifp;
40
41#define MIBSIZ 6
42  int mib[MIBSIZ] =
43  {
44    CTL_NET,
45    PF_ROUTE,
46    0,
47    0, /*  AF_INET & AF_INET6 */
48    NET_RT_IFLIST,
49    0
50  };
51
52  /* Query buffer size. */
53  if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0)
54    {
55      zlog_warn ("sysctl() error by %s", strerror (errno));
56      return -1;
57    }
58
59  /* We free this memory at the end of this function. */
60  ref = buf = XMALLOC (MTYPE_TMP, bufsiz);
61
62  /* Fetch interface informations into allocated buffer. */
63  if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0)
64    {
65      zlog (NULL, LOG_WARNING, "sysctl error by %s", strerror (errno));
66      return -1;
67    }
68
69  /* Parse both interfaces and addresses. */
70  for (end = buf + bufsiz; buf < end; buf += ifm->ifm_msglen)
71    {
72      ifm = (struct if_msghdr *) buf;
73      if (ifm->ifm_type == RTM_IFINFO)
74	{
75	  ifp = if_lookup_by_index (ifm->ifm_index);
76	  if (ifp)
77	    ifp->stats = ifm->ifm_data;
78	}
79    }
80
81  /* Free sysctl buffer. */
82  XFREE (MTYPE_TMP, ref);
83
84  return 0;
85}
86
87/* Interface listing up function using sysctl(). */
88void
89interface_list ()
90{
91  caddr_t ref, buf, end;
92  size_t bufsiz;
93  struct if_msghdr *ifm;
94  int ifm_read (struct if_msghdr *);
95  int ifam_read (struct ifa_msghdr *);
96
97#define MIBSIZ 6
98  int mib[MIBSIZ] =
99  {
100    CTL_NET,
101    PF_ROUTE,
102    0,
103    0, /*  AF_INET & AF_INET6 */
104    NET_RT_IFLIST,
105    0
106  };
107
108  /* Query buffer size. */
109  if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0)
110    {
111      zlog (NULL, LOG_WARNING, "sysctl() error by %s", strerror (errno));
112      return;
113    }
114
115  /* We free this memory at the end of this function. */
116  ref = buf = XMALLOC (MTYPE_TMP, bufsiz);
117
118  /* Fetch interface informations into allocated buffer. */
119  if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0)
120    {
121      zlog (NULL, LOG_WARNING, "sysctl error by %s", strerror (errno));
122      return;
123    }
124
125  /* Parse both interfaces and addresses. */
126  for (end = buf + bufsiz; buf < end; buf += ifm->ifm_msglen)
127    {
128      ifm = (struct if_msghdr *) buf;
129
130      switch (ifm->ifm_type)
131	{
132	case RTM_IFINFO:
133	  ifm_read (ifm);
134	  break;
135	case RTM_NEWADDR:
136	  ifam_read ((struct ifa_msghdr *) ifm);
137	  break;
138	default:
139	  zlog_info ("interfaces_list(): unexpected message type");
140	  XFREE (MTYPE_TMP, ref);
141	  return;
142	  break;
143	}
144    }
145
146  /* Free sysctl buffer. */
147  XFREE (MTYPE_TMP, ref);
148}
149