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Annotation of embedaddon/quagga/zebra/if_sysctl.c, revision 1.1

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