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Annotation of embedaddon/quagga/zebra/rtread_sysctl.c, revision 1.1.1.2

1.1       misho       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"
1.1.1.2 ! misho      27: #include "vrf.h"
1.1       misho      28: 
                     29: #include "zebra/zserv.h"
                     30: #include "zebra/rt.h"
                     31: #include "zebra/kernel_socket.h"
                     32: 
                     33: /* Kernel routing table read up by sysctl function. */
                     34: void
1.1.1.2 ! misho      35: route_read (struct zebra_vrf *zvrf)
1.1       misho      36: {
                     37:   caddr_t buf, end, ref;
                     38:   size_t bufsiz;
                     39:   struct rt_msghdr *rtm;
                     40:   
                     41: #define MIBSIZ 6
                     42:   int mib[MIBSIZ] = 
                     43:   {
                     44:     CTL_NET,
                     45:     PF_ROUTE,
                     46:     0,
                     47:     0,
                     48:     NET_RT_DUMP,
                     49:     0
                     50:   };
1.1.1.2 ! misho      51: 
        !            52:   if (zvrf->vrf_id != VRF_DEFAULT)
        !            53:     return;
        !            54: 
1.1       misho      55:   /* Get buffer size. */
                     56:   if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) 
                     57:     {
                     58:       zlog_warn ("sysctl fail: %s", safe_strerror (errno));
                     59:       return;
                     60:     }
                     61: 
                     62:   /* Allocate buffer. */
                     63:   ref = buf = XMALLOC (MTYPE_TMP, bufsiz);
                     64:   
                     65:   /* Read routing table information by calling sysctl(). */
                     66:   if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) 
                     67:     {
                     68:       zlog_warn ("sysctl() fail by %s", safe_strerror (errno));
                     69:       return;
                     70:     }
                     71: 
                     72:   for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen) 
                     73:     {
                     74:       rtm = (struct rt_msghdr *) buf;
                     75:       /* We must set RTF_DONE here, so rtm_read() doesn't ignore the message. */
                     76:       SET_FLAG (rtm->rtm_flags, RTF_DONE);
                     77:       rtm_read (rtm);
                     78:     }
                     79: 
                     80:   /* Free buffer. */
                     81:   XFREE (MTYPE_TMP, ref);
                     82: 
                     83:   return;
                     84: }