diff options
Diffstat (limited to 'zebra/if_sysctl.c')
| -rw-r--r-- | zebra/if_sysctl.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/zebra/if_sysctl.c b/zebra/if_sysctl.c new file mode 100644 index 000000000..1441dfcc0 --- /dev/null +++ b/zebra/if_sysctl.c @@ -0,0 +1,148 @@ +/* + * Get interface's address and mask information by sysctl() function. + * Copyright (C) 1997, 98 Kunihiro Ishiguro + * + * This file is part of GNU Zebra. + * + * GNU Zebra is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * GNU Zebra is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Zebra; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include <zebra.h> + +#include "if.h" +#include "sockunion.h" +#include "prefix.h" +#include "connected.h" +#include "memory.h" +#include "ioctl.h" +#include "log.h" + +int +ifstat_update_sysctl () +{ + caddr_t ref, buf, end; + size_t bufsiz; + struct if_msghdr *ifm; + struct interface *ifp; + +#define MIBSIZ 6 + int mib[MIBSIZ] = + { + CTL_NET, + PF_ROUTE, + 0, + 0, /* AF_INET & AF_INET6 */ + NET_RT_IFLIST, + 0 + }; + + /* Query buffer size. */ + if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) + { + zlog_warn ("sysctl() error by %s", strerror (errno)); + return -1; + } + + /* We free this memory at the end of this function. */ + ref = buf = XMALLOC (MTYPE_TMP, bufsiz); + + /* Fetch interface informations into allocated buffer. */ + if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) + { + zlog (NULL, LOG_WARNING, "sysctl error by %s", strerror (errno)); + return -1; + } + + /* Parse both interfaces and addresses. */ + for (end = buf + bufsiz; buf < end; buf += ifm->ifm_msglen) + { + ifm = (struct if_msghdr *) buf; + if (ifm->ifm_type == RTM_IFINFO) + { + ifp = if_lookup_by_index (ifm->ifm_index); + if (ifp) + ifp->stats = ifm->ifm_data; + } + } + + /* Free sysctl buffer. */ + XFREE (MTYPE_TMP, ref); + + return 0; +} + +/* Interface listing up function using sysctl(). */ +void +interface_list () +{ + caddr_t ref, buf, end; + size_t bufsiz; + struct if_msghdr *ifm; + int ifm_read (struct if_msghdr *); + int ifam_read (struct ifa_msghdr *); + +#define MIBSIZ 6 + int mib[MIBSIZ] = + { + CTL_NET, + PF_ROUTE, + 0, + 0, /* AF_INET & AF_INET6 */ + NET_RT_IFLIST, + 0 + }; + + /* Query buffer size. */ + if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) + { + zlog (NULL, LOG_WARNING, "sysctl() error by %s", strerror (errno)); + return; + } + + /* We free this memory at the end of this function. */ + ref = buf = XMALLOC (MTYPE_TMP, bufsiz); + + /* Fetch interface informations into allocated buffer. */ + if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) + { + zlog (NULL, LOG_WARNING, "sysctl error by %s", strerror (errno)); + return; + } + + /* Parse both interfaces and addresses. */ + for (end = buf + bufsiz; buf < end; buf += ifm->ifm_msglen) + { + ifm = (struct if_msghdr *) buf; + + switch (ifm->ifm_type) + { + case RTM_IFINFO: + ifm_read (ifm); + break; + case RTM_NEWADDR: + ifam_read ((struct ifa_msghdr *) ifm); + break; + default: + zlog_info ("interfaces_list(): unexpected message type"); + XFREE (MTYPE_TMP, ref); + return; + break; + } + } + + /* Free sysctl buffer. */ + XFREE (MTYPE_TMP, ref); +} |