Mercurial > flash_v2

annotate packages/net/snmp/lib/current/src/callback.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children
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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 //==========================================================================
208
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7 //####ECOSGPLCOPYRIGHTBEGIN####
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8 // -------------------------------------------
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9 // This file is part of eCos, the Embedded Configurable Operating System.
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10 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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11 //
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12 // eCos is free software; you can redistribute it and/or modify it under
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13 // the terms of the GNU General Public License as published by the Free
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14 // Software Foundation; either version 2 or (at your option) any later version.
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15 //
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16 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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17 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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18 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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19 // for more details.
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20 //
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21 // You should have received a copy of the GNU General Public License along
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22 // with eCos; if not, write to the Free Software Foundation, Inc.,
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23 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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24 //
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25 // As a special exception, if other files instantiate templates or use macros
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26 // or inline functions from this file, or you compile this file and link it
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27 // with other works to produce a work based on this file, this file does not
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28 // by itself cause the resulting work to be covered by the GNU General Public
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29 // License. However the source code for this file must still be made available
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30 // in accordance with section (3) of the GNU General Public License.
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31 //
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32 // This exception does not invalidate any other reasons why a work based on
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33 // this file might be covered by the GNU General Public License.
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34 //
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35 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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36 // at http://sources.redhat.com/ecos/ecos-license/
208
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37 // -------------------------------------------
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38 //####ECOSGPLCOPYRIGHTEND####
103
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39 //####UCDSNMPCOPYRIGHTBEGIN####
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40 //
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41 // -------------------------------------------
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42 //
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43 // Portions of this software may have been derived from the UCD-SNMP
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44 // project, <http://ucd-snmp.ucdavis.edu/> from the University of
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45 // California at Davis, which was originally based on the Carnegie Mellon
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46 // University SNMP implementation. Portions of this software are therefore
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47 // covered by the appropriate copyright disclaimers included herein.
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48 //
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49 // The release used was version 4.1.2 of May 2000. "ucd-snmp-4.1.2"
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50 // -------------------------------------------
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51 //
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52 //####UCDSNMPCOPYRIGHTEND####
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53 //==========================================================================
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54 //#####DESCRIPTIONBEGIN####
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55 //
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56 // Author(s): hmt
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57 // Contributors: hmt
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58 // Date: 2000-05-30
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59 // Purpose: Port of UCD-SNMP distribution to eCos.
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60 // Description:
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61 //
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62 //
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63 //####DESCRIPTIONEND####
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64 //
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65 //==========================================================================
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66 /********************************************************************
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67 Copyright 1989, 1991, 1992 by Carnegie Mellon University
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68
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69 Derivative Work -
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70 Copyright 1996, 1998, 1999, 2000 The Regents of the University of California
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71
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72 All Rights Reserved
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73
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74 Permission to use, copy, modify and distribute this software and its
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75 documentation for any purpose and without fee is hereby granted,
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76 provided that the above copyright notice appears in all copies and
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77 that both that copyright notice and this permission notice appear in
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78 supporting documentation, and that the name of CMU and The Regents of
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79 the University of California not be used in advertising or publicity
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80 pertaining to distribution of the software without specific written
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81 permission.
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82
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83 CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
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84 WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
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85 WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL CMU OR
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86 THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
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87 INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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88 FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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89 CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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90 CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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91 *********************************************************************/
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92 /* callback.c: A generic callback mechanism */
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93
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94 #include <config.h>
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95 #include <sys/types.h>
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96 #include <stdio.h>
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97 #if HAVE_STDLIB_H
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98 #include <stdlib.h>
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99 #endif
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100 #if HAVE_WINSOCK_H
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101 #include <winsock.h>
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102 #endif
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103 #if HAVE_NETINET_IN_H
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104 #include <netinet/in.h>
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105 #endif
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106 #if HAVE_STRING_H
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107 #include <string.h>
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108 #else
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109 #include <strings.h>
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110 #endif
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111
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112 #if HAVE_DMALLOC_H
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113 #include <dmalloc.h>
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114 #endif
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115
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116 #include "tools.h"
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117 #include "callback.h"
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118 #include "asn1.h"
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119 #include "snmp_api.h"
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120 #include "snmp_debug.h"
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121
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122 static struct snmp_gen_callback *thecallbacks[MAX_CALLBACK_IDS][MAX_CALLBACK_SUBIDS];
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123
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124 /* the chicken. or the egg. You pick. */
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125 void
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126 init_callbacks(void) {
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127 /* probably not needed? Should be full of 0's anyway? */
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128 /* (poses a problem if you put init_callbacks() inside of
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129 init_snmp() and then want the app to register a callback before
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130 init_snmp() is called in the first place. -- Wes */
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131 /* memset(thecallbacks, 0, sizeof(thecallbacks)); */
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132 }
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133
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134 int
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135 snmp_register_callback(int major, int minor, SNMPCallback *new_callback,
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136 void *arg) {
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137
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138 struct snmp_gen_callback *scp;
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139
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140 if (major >= MAX_CALLBACK_IDS || minor >= MAX_CALLBACK_SUBIDS) {
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141 return SNMPERR_GENERR;
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142 }
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143
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144 if (thecallbacks[major][minor] != NULL) {
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145 /* get to the end of the list */
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146 for(scp = thecallbacks[major][minor]; scp->next != NULL; scp = scp->next);
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147
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148 /* mallocate a new entry */
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149 scp->next = SNMP_MALLOC_STRUCT(snmp_gen_callback);
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150 scp = scp->next;
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151 } else {
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152 /* mallocate a new entry */
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153 scp = SNMP_MALLOC_STRUCT(snmp_gen_callback);
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154
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155 /* make the new node the head */
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156 thecallbacks[major][minor] = scp;
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157 }
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158
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159 if (scp == NULL)
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160 return SNMPERR_GENERR;
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161
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162 scp->sc_client_arg = arg;
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163 scp->sc_callback = new_callback;
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164
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165 DEBUGMSGTL(("callback","registered callback for maj=%d min=%d\n",
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166 major, minor));
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167
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168 return SNMPERR_SUCCESS;
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169 }
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170
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171 int
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172 snmp_call_callbacks(int major, int minor, void *caller_arg) {
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173 struct snmp_gen_callback *scp;
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174
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175 if (major >= MAX_CALLBACK_IDS || minor >= MAX_CALLBACK_SUBIDS) {
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176 return SNMPERR_GENERR;
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177 }
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178
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179 DEBUGMSGTL(("callback","START calling callbacks for maj=%d min=%d\n",
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180 major, minor));
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181
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182 /* for each registered callback of type major and minor */
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183 for(scp = thecallbacks[major][minor]; scp != NULL; scp = scp->next) {
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184
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185 DEBUGMSGTL(("callback","calling a callback for maj=%d min=%d\n",
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186 major, minor));
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187
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188 /* call them */
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189 (*(scp->sc_callback))(major, minor, caller_arg, scp->sc_client_arg);
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190 }
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191
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192 DEBUGMSGTL(("callback","END calling callbacks for maj=%d min=%d\n",
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193 major, minor));
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194
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195 return SNMPERR_SUCCESS;
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196 }