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