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annotate packages/net/snmp/lib/current/src/callback.c @ 103:95f3e12a6327 ecos-sw-2000-06-23

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Merge from eCos master repository on 2000-06-23-16:41:10-BST
author jlarmour
date Fri, 23 Jun 2000 17:06:31 +0000
parents
children e0c0827131d1
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1 //==========================================================================
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2 //
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3 // ./lib/current/src/callback.c
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4 //
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5 //
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6 //==========================================================================
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7 //####COPYRIGHTBEGIN####
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8 //
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9 // -------------------------------------------
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10 // The contents of this file are subject to the Red Hat eCos Public License
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11 // Version 1.1 (the "License"); you may not use this file except in
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12 // compliance with the License. You may obtain a copy of the License at
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13 // http://www.redhat.com/
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14 //
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15 // Software distributed under the License is distributed on an "AS IS"
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16 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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17 // License for the specific language governing rights and limitations under
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18 // the License.
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19 //
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20 // The Original Code is eCos - Embedded Configurable Operating System,
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21 // released September 30, 1998.
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22 //
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23 // The Initial Developer of the Original Code is Red Hat.
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24 // Portions created by Red Hat are
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25 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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26 // All Rights Reserved.
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27 // -------------------------------------------
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28 //
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29 //####COPYRIGHTEND####
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30 //####UCDSNMPCOPYRIGHTBEGIN####
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31 //
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32 // -------------------------------------------
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33 //
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34 // Portions of this software may have been derived from the UCD-SNMP
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35 // project, <http://ucd-snmp.ucdavis.edu/> from the University of
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36 // California at Davis, which was originally based on the Carnegie Mellon
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37 // University SNMP implementation. Portions of this software are therefore
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38 // covered by the appropriate copyright disclaimers included herein.
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39 //
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40 // The release used was version 4.1.2 of May 2000. "ucd-snmp-4.1.2"
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41 // -------------------------------------------
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42 //
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43 //####UCDSNMPCOPYRIGHTEND####
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44 //==========================================================================
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45 //#####DESCRIPTIONBEGIN####
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46 //
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47 // Author(s): hmt
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48 // Contributors: hmt
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49 // Date: 2000-05-30
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50 // Purpose: Port of UCD-SNMP distribution to eCos.
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51 // Description:
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52 //
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53 //
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54 //####DESCRIPTIONEND####
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55 //
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56 //==========================================================================
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57 /********************************************************************
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58 Copyright 1989, 1991, 1992 by Carnegie Mellon University
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59
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60 Derivative Work -
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61 Copyright 1996, 1998, 1999, 2000 The Regents of the University of California
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62
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63 All Rights Reserved
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64
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65 Permission to use, copy, modify and distribute this software and its
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66 documentation for any purpose and without fee is hereby granted,
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67 provided that the above copyright notice appears in all copies and
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68 that both that copyright notice and this permission notice appear in
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69 supporting documentation, and that the name of CMU and The Regents of
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70 the University of California not be used in advertising or publicity
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71 pertaining to distribution of the software without specific written
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72 permission.
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73
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74 CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
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75 WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
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76 WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL CMU OR
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77 THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
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78 INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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79 FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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80 CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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81 CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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82 *********************************************************************/
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83 /* callback.c: A generic callback mechanism */
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84
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85 #include <config.h>
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86 #include <sys/types.h>
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87 #include <stdio.h>
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88 #if HAVE_STDLIB_H
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89 #include <stdlib.h>
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90 #endif
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91 #if HAVE_WINSOCK_H
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92 #include <winsock.h>
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93 #endif
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94 #if HAVE_NETINET_IN_H
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95 #include <netinet/in.h>
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96 #endif
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97 #if HAVE_STRING_H
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98 #include <string.h>
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99 #else
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100 #include <strings.h>
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101 #endif
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102
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103 #if HAVE_DMALLOC_H
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104 #include <dmalloc.h>
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105 #endif
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106
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107 #include "tools.h"
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108 #include "callback.h"
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109 #include "asn1.h"
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110 #include "snmp_api.h"
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111 #include "snmp_debug.h"
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112
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113 static struct snmp_gen_callback *thecallbacks[MAX_CALLBACK_IDS][MAX_CALLBACK_SUBIDS];
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114
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115 /* the chicken. or the egg. You pick. */
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116 void
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117 init_callbacks(void) {
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118 /* probably not needed? Should be full of 0's anyway? */
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119 /* (poses a problem if you put init_callbacks() inside of
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120 init_snmp() and then want the app to register a callback before
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121 init_snmp() is called in the first place. -- Wes */
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122 /* memset(thecallbacks, 0, sizeof(thecallbacks)); */
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123 }
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124
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125 int
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126 snmp_register_callback(int major, int minor, SNMPCallback *new_callback,
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127 void *arg) {
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128
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129 struct snmp_gen_callback *scp;
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130
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131 if (major >= MAX_CALLBACK_IDS || minor >= MAX_CALLBACK_SUBIDS) {
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132 return SNMPERR_GENERR;
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133 }
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134
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135 if (thecallbacks[major][minor] != NULL) {
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136 /* get to the end of the list */
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137 for(scp = thecallbacks[major][minor]; scp->next != NULL; scp = scp->next);
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138
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139 /* mallocate a new entry */
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140 scp->next = SNMP_MALLOC_STRUCT(snmp_gen_callback);
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141 scp = scp->next;
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142 } else {
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143 /* mallocate a new entry */
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144 scp = SNMP_MALLOC_STRUCT(snmp_gen_callback);
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145
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146 /* make the new node the head */
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147 thecallbacks[major][minor] = scp;
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148 }
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149
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150 if (scp == NULL)
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151 return SNMPERR_GENERR;
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152
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153 scp->sc_client_arg = arg;
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154 scp->sc_callback = new_callback;
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155
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156 DEBUGMSGTL(("callback","registered callback for maj=%d min=%d\n",
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157 major, minor));
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158
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159 return SNMPERR_SUCCESS;
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160 }
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161
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162 int
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163 snmp_call_callbacks(int major, int minor, void *caller_arg) {
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164 struct snmp_gen_callback *scp;
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165
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166 if (major >= MAX_CALLBACK_IDS || minor >= MAX_CALLBACK_SUBIDS) {
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167 return SNMPERR_GENERR;
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168 }
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169
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170 DEBUGMSGTL(("callback","START calling callbacks for maj=%d min=%d\n",
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171 major, minor));
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172
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173 /* for each registered callback of type major and minor */
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174 for(scp = thecallbacks[major][minor]; scp != NULL; scp = scp->next) {
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175
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176 DEBUGMSGTL(("callback","calling a callback for maj=%d min=%d\n",
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177 major, minor));
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178
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179 /* call them */
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180 (*(scp->sc_callback))(major, minor, caller_arg, scp->sc_client_arg);
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181 }
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182
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183 DEBUGMSGTL(("callback","END calling callbacks for maj=%d min=%d\n",
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184 major, minor));
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185
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186 return SNMPERR_SUCCESS;
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187 }