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Annotation of embedaddon/quagga/lib/snmp.c, revision 1.1.1.1

1.1       misho       1: /* SNMP support
                      2:  * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
                      3:  *
                      4:  * This file is part of GNU Zebra.
                      5:  *
                      6:  * GNU Zebra is free software; you can redistribute it and/or modify it
                      7:  * under the terms of the GNU General Public License as published by the
                      8:  * Free Software Foundation; either version 2, or (at your option) any
                      9:  * later version.
                     10:  *
                     11:  * GNU Zebra is distributed in the hope that it will be useful, but
                     12:  * WITHOUT ANY WARRANTY; without even the implied warranty of
                     13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     14:  * General Public License for more details.
                     15:  *
                     16:  * You should have received a copy of the GNU General Public License
                     17:  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
                     18:  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
                     19:  * 02111-1307, USA.  
                     20:  */
                     21: 
                     22: #include <zebra.h>
                     23: 
                     24: #ifdef HAVE_SNMP
                     25: #include <net-snmp/net-snmp-config.h>
                     26: #include <net-snmp/net-snmp-includes.h>
                     27: 
                     28: #include "smux.h"
                     29: 
                     30: #define min(A,B) ((A) < (B) ? (A) : (B))
                     31: 
                     32: int
                     33: oid_compare (oid *o1, int o1_len, oid *o2, int o2_len)
                     34: {
                     35:   int i;
                     36: 
                     37:   for (i = 0; i < min (o1_len, o2_len); i++)
                     38:     {
                     39:       if (o1[i] < o2[i])
                     40:        return -1;
                     41:       else if (o1[i] > o2[i])
                     42:        return 1;
                     43:     }
                     44:   if (o1_len < o2_len)
                     45:     return -1;
                     46:   if (o1_len > o2_len)
                     47:     return 1;
                     48: 
                     49:   return 0;
                     50: }
                     51: 
                     52: void *
                     53: oid_copy (void *dest, const void *src, size_t size)
                     54: {
                     55:   return memcpy (dest, src, size * sizeof (oid));
                     56: }
                     57: 
                     58: void
                     59: oid2in_addr (oid oid[], int len, struct in_addr *addr)
                     60: {
                     61:   int i;
                     62:   u_char *pnt;
                     63:   
                     64:   if (len == 0)
                     65:     return;
                     66: 
                     67:   pnt = (u_char *) addr;
                     68: 
                     69:   for (i = 0; i < len; i++)
                     70:     *pnt++ = oid[i];
                     71: }
                     72: 
                     73: void
                     74: oid_copy_addr (oid oid[], struct in_addr *addr, int len)
                     75: {
                     76:   int i;
                     77:   u_char *pnt;
                     78:   
                     79:   if (len == 0)
                     80:     return;
                     81: 
                     82:   pnt = (u_char *) addr;
                     83: 
                     84:   for (i = 0; i < len; i++)
                     85:     oid[i] = *pnt++;
                     86: }
                     87: 
                     88: int
                     89: smux_header_generic (struct variable *v, oid *name, size_t *length, int exact,
                     90:                     size_t *var_len, WriteMethod **write_method)
                     91: {
                     92:   oid fulloid[MAX_OID_LEN];
                     93:   int ret;
                     94: 
                     95:   oid_copy (fulloid, v->name, v->namelen);
                     96:   fulloid[v->namelen] = 0;
                     97:   /* Check against full instance. */
                     98:   ret = oid_compare (name, *length, fulloid, v->namelen + 1);
                     99: 
                    100:   /* Check single instance. */
                    101:   if ((exact && (ret != 0)) || (!exact && (ret >= 0)))
                    102:        return MATCH_FAILED;
                    103: 
                    104:   /* In case of getnext, fill in full instance. */
                    105:   memcpy (name, fulloid, (v->namelen + 1) * sizeof (oid));
                    106:   *length = v->namelen + 1;
                    107: 
                    108:   *write_method = 0;
                    109:   *var_len = sizeof(long);    /* default to 'long' results */
                    110: 
                    111:   return MATCH_SUCCEEDED;
                    112: }
                    113: 
                    114: int
                    115: smux_header_table (struct variable *v, oid *name, size_t *length, int exact,
                    116:                   size_t *var_len, WriteMethod **write_method)
                    117: {
                    118:   /* If the requested OID name is less than OID prefix we
                    119:      handle, adjust it to our prefix. */
                    120:   if ((oid_compare (name, *length, v->name, v->namelen)) < 0)
                    121:     {
                    122:       if (exact)
                    123:        return MATCH_FAILED;
                    124:       oid_copy(name, v->name, v->namelen);
                    125:       *length = v->namelen;
                    126:     }
                    127: 
                    128:   *write_method = 0;
                    129:   *var_len = sizeof(long);
                    130: 
                    131:   return MATCH_SUCCEEDED;
                    132: }
                    133: #endif /* HAVE_SNMP */