Return to rtread_sysctl.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / quagga / zebra

Annotation of embedaddon/quagga/zebra/rtread_sysctl.c, revision 1.1.1.1

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