diff options
Diffstat (limited to 'zebra/if_sysctl.c')
| -rw-r--r-- | zebra/if_sysctl.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/zebra/if_sysctl.c b/zebra/if_sysctl.c new file mode 100644 index 0000000..70d1164 --- /dev/null +++ b/zebra/if_sysctl.c @@ -0,0 +1,146 @@ +/* + * 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 this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <zebra.h> + +#if !defined(GNU_LINUX) && !defined(OPEN_BSD) + +#include "if.h" +#include "sockunion.h" +#include "prefix.h" +#include "connected.h" +#include "memory.h" +#include "ioctl.h" +#include "log.h" +#include "interface.h" +#include "vrf.h" + +#include "zebra/rt.h" +#include "zebra/kernel_socket.h" +#include "zebra/rib.h" +#include "zebra/zebra_errors.h" + +void ifstat_update_sysctl(void) +{ + 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) { + flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl() error by %s", + safe_strerror(errno)); + return; + } + + /* We free this memory at the end of this function. */ + ref = buf = XMALLOC(MTYPE_TMP, bufsiz); + + /* Fetch interface information into allocated buffer. */ + if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) { + flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl error by %s", + safe_strerror(errno)); + XFREE(MTYPE_TMP, ref); + return; + } + + /* 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, VRF_DEFAULT); + if (ifp) + ifp->stats = ifm->ifm_data; + } + } + + /* Free sysctl buffer. */ + XFREE(MTYPE_TMP, ref); + + return; +} + +/* Interface listing up function using sysctl(). */ +void interface_list(struct zebra_ns *zns) +{ + caddr_t ref, buf, end; + size_t bufsiz; + struct if_msghdr *ifm; + +#define MIBSIZ 6 + int mib[MIBSIZ] = { + CTL_NET, PF_ROUTE, 0, 0, /* AF_INET & AF_INET6 */ + NET_RT_IFLIST, 0}; + + if (zns->ns_id != NS_DEFAULT) { + zlog_debug("%s: ignore NS %u", __func__, zns->ns_id); + return; + } + + /* Query buffer size. */ + if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) { + flog_err_sys(EC_ZEBRA_IFLIST_FAILED, + "Could not enumerate interfaces: %s", + safe_strerror(errno)); + return; + } + + /* We free this memory at the end of this function. */ + ref = buf = XMALLOC(MTYPE_TMP, bufsiz); + + /* Fetch interface information into allocated buffer. */ + if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) { + flog_err_sys(EC_ZEBRA_IFLIST_FAILED, + "Could not enumerate interfaces: %s", + safe_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("%s: unexpected message type", __func__); + XFREE(MTYPE_TMP, ref); + return; + break; + } + } + + /* Free sysctl buffer. */ + XFREE(MTYPE_TMP, ref); +} + +#endif /* !defined(GNU_LINUX) && !defined(OPEN_BSD) */ |