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<div class="title">snmpSTDDomain.c</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include <net-snmp/net-snmp-config.h></span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="preprocessor">#include <stdio.h></span>
<a name="l00004"></a>00004 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00005"></a>00005 <span class="preprocessor">#include <signal.h></span>
<a name="l00006"></a>00006 <span class="preprocessor">#include <errno.h></span>
<a name="l00007"></a>00007
<a name="l00008"></a>00008 <span class="preprocessor">#if HAVE_STRING_H</span>
<a name="l00009"></a>00009 <span class="preprocessor"></span><span class="preprocessor">#include <string.h></span>
<a name="l00010"></a>00010 <span class="preprocessor">#else</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#include <strings.h></span>
<a name="l00012"></a>00012 <span class="preprocessor">#endif</span>
<a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_STDLIB_H</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#include <stdlib.h></span>
<a name="l00015"></a>00015 <span class="preprocessor">#endif</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_UNISTD_H</span>
<a name="l00017"></a>00017 <span class="preprocessor"></span><span class="preprocessor">#include <unistd.h></span>
<a name="l00018"></a>00018 <span class="preprocessor">#endif</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020 <span class="preprocessor">#if HAVE_DMALLOC_H</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#include <dmalloc.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#endif</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <net-snmp/types.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <net-snmp/output_api.h></span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#include <net-snmp/library/snmp_transport.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <net-snmp/library/snmpSTDDomain.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <<a class="code" href="tools_8h.html">net-snmp/library/tools.h</a>></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 oid netsnmp_snmpSTDDomain[] = { TRANSPORT_DOMAIN_STD_IP };
<a name="l00032"></a>00032 <span class="keyword">static</span> <a class="code" href="structnetsnmp__tdomain__s.html">netsnmp_tdomain</a> stdDomain;
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="comment">/*</span>
<a name="l00035"></a>00035 <span class="comment"> * Return a string representing the address in data, or else the "far end"</span>
<a name="l00036"></a>00036 <span class="comment"> * address if data is NULL. </span>
<a name="l00037"></a>00037 <span class="comment"> */</span>
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="keyword">static</span> <span class="keywordtype">char</span> *
<a name="l00040"></a>00040 netsnmp_std_fmtaddr(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t, <span class="keywordtype">void</span> *data, <span class="keywordtype">int</span> len)
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 <span class="keywordtype">char</span> *buf;
<a name="l00043"></a>00043 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">"formatting addr. data=%x\n"</span>,t->data));
<a name="l00044"></a>00044 <span class="keywordflow">if</span> (t->data) {
<a name="l00045"></a>00045 netsnmp_std_data *data = (netsnmp_std_data*)t->data;
<a name="l00046"></a>00046 buf = (<span class="keywordtype">char</span>*)malloc(SNMP_MAXBUF_MEDIUM);
<a name="l00047"></a>00047 <span class="keywordflow">if</span> (!buf)
<a name="l00048"></a>00048 <span class="keywordflow">return</span> strdup(<span class="stringliteral">"STDInOut"</span>);
<a name="l00049"></a>00049 snprintf(buf, SNMP_MAXBUF_MEDIUM, <span class="stringliteral">"STD:%s"</span>, data->prog);
<a name="l00050"></a>00050 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">" formatted:=%s\n"</span>,buf));
<a name="l00051"></a>00051 <span class="keywordflow">return</span> buf;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 <span class="keywordflow">return</span> strdup(<span class="stringliteral">"STDInOut"</span>);
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">/*</span>
<a name="l00059"></a>00059 <span class="comment"> * You can write something into opaque that will subsequently get passed back </span>
<a name="l00060"></a>00060 <span class="comment"> * to your send function if you like. For instance, you might want to</span>
<a name="l00061"></a>00061 <span class="comment"> * remember where a PDU came from, so that you can send a reply there... </span>
<a name="l00062"></a>00062 <span class="comment"> */</span>
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00065"></a>00065 netsnmp_std_recv(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t, <span class="keywordtype">void</span> *buf, <span class="keywordtype">int</span> size,
<a name="l00066"></a>00066 <span class="keywordtype">void</span> **opaque, <span class="keywordtype">int</span> *olength)
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="keywordtype">int</span> rc = -1;
<a name="l00069"></a>00069
<a name="l00070"></a>00070 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">"recv on sock %d. data=%x\n"</span>,t->sock, t->data));
<a name="l00071"></a>00071 <span class="keywordflow">while</span> (rc < 0) {
<a name="l00072"></a>00072 rc = read(t->sock, buf, size);
<a name="l00073"></a>00073 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">" bytes: %d.\n"</span>, rc));
<a name="l00074"></a>00074 <span class="keywordflow">if</span> (rc < 0 && errno != EINTR) {
<a name="l00075"></a>00075 DEBUGMSGTL((<span class="stringliteral">"netsnmp_std"</span>, <span class="stringliteral">" read on fd %d failed: %d (\"%s\")\n"</span>,
<a name="l00076"></a>00076 t->sock, errno, strerror(errno)));
<a name="l00077"></a>00077 <span class="keywordflow">break</span>;
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079 <span class="keywordflow">if</span> (rc == 0) {
<a name="l00080"></a>00080 <span class="comment">/* 0 input is probably bad since we selected on it */</span>
<a name="l00081"></a>00081 <span class="keywordflow">return</span> -1;
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 DEBUGMSGTL((<span class="stringliteral">"netsnmp_std"</span>, <span class="stringliteral">"read on stdin got %d bytes\n"</span>, rc));
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordflow">return</span> rc;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00092"></a>00092 netsnmp_std_send(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t, <span class="keywordtype">void</span> *buf, <span class="keywordtype">int</span> size,
<a name="l00093"></a>00093 <span class="keywordtype">void</span> **opaque, <span class="keywordtype">int</span> *olength)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keywordtype">int</span> rc = -1;
<a name="l00096"></a>00096
<a name="l00097"></a>00097 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">"send on sock. data=%x\n"</span>, t->data));
<a name="l00098"></a>00098 <span class="keywordflow">while</span> (rc < 0) {
<a name="l00099"></a>00099 <span class="keywordflow">if</span> (t->data) {
<a name="l00100"></a>00100 netsnmp_std_data *data = (netsnmp_std_data*)t->data;
<a name="l00101"></a>00101 rc = write(data->outfd, buf, size);
<a name="l00102"></a>00102 } <span class="keywordflow">else</span> {
<a name="l00103"></a>00103 <span class="comment">/* straight to stdout */</span>
<a name="l00104"></a>00104 rc = write(1, buf, size);
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (rc < 0 && errno != EINTR) {
<a name="l00107"></a>00107 <span class="keywordflow">break</span>;
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110 <span class="keywordflow">return</span> rc;
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00114"></a>00114 netsnmp_std_close(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t)
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">"close. data=%x\n"</span>, t->data));
<a name="l00117"></a>00117 <span class="keywordflow">if</span> (t->data) {
<a name="l00118"></a>00118 netsnmp_std_data *data = (netsnmp_std_data*)t->data;
<a name="l00119"></a>00119 close(data->outfd);
<a name="l00120"></a>00120 close(t->sock);
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="comment">/* kill the child too */</span>
<a name="l00123"></a>00123 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">" killing %d\n"</span>, data->childpid));
<a name="l00124"></a>00124 kill(data->childpid, SIGTERM);
<a name="l00125"></a>00125 sleep(1);
<a name="l00126"></a>00126 kill(data->childpid, SIGKILL);
<a name="l00127"></a>00127 <span class="comment">/* XXX: set an alarm to kill harder the child */</span>
<a name="l00128"></a>00128 } <span class="keywordflow">else</span> {
<a name="l00129"></a>00129 <span class="comment">/* close stdout/in */</span>
<a name="l00130"></a>00130 close(1);
<a name="l00131"></a>00131 close(0);
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 <span class="keywordflow">return</span> 0;
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00139"></a>00139 netsnmp_std_accept(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t)
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">" accept data=%x\n"</span>, t->data));
<a name="l00142"></a>00142 <span class="comment">/* nothing to do here */</span>
<a name="l00143"></a>00143 <span class="keywordflow">return</span> 0;
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">/*</span>
<a name="l00147"></a>00147 <span class="comment"> * Open a STDIN/STDOUT -based transport for SNMP.</span>
<a name="l00148"></a>00148 <span class="comment"> */</span>
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *
<a name="l00151"></a>00151 netsnmp_std_transport(<span class="keyword">const</span> <span class="keywordtype">char</span> *instring, <span class="keywordtype">size_t</span> instring_len,
<a name="l00152"></a>00152 <span class="keyword">const</span> <span class="keywordtype">char</span> *default_target)
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t;
<a name="l00155"></a>00155
<a name="l00156"></a>00156 t = (<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *) malloc(<span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a>));
<a name="l00157"></a>00157 <span class="keywordflow">if</span> (t == NULL) {
<a name="l00158"></a>00158 <span class="keywordflow">return</span> NULL;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160 memset(t, 0, <span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a>));
<a name="l00161"></a>00161
<a name="l00162"></a>00162 t->domain = netsnmp_snmpSTDDomain;
<a name="l00163"></a>00163 t->domain_length =
<a name="l00164"></a>00164 <span class="keyword">sizeof</span>(netsnmp_snmpSTDDomain) / <span class="keyword">sizeof</span>(netsnmp_snmpSTDDomain[0]);
<a name="l00165"></a>00165
<a name="l00166"></a>00166 t->sock = 0;
<a name="l00167"></a>00167 t->flags = NETSNMP_TRANSPORT_FLAG_STREAM | NETSNMP_TRANSPORT_FLAG_TUNNELED;
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="comment">/*</span>
<a name="l00170"></a>00170 <span class="comment"> * Message size is not limited by this transport (hence msgMaxSize</span>
<a name="l00171"></a>00171 <span class="comment"> * is equal to the maximum legal size of an SNMP message). </span>
<a name="l00172"></a>00172 <span class="comment"> */</span>
<a name="l00173"></a>00173
<a name="l00174"></a>00174 t->msgMaxSize = 0x7fffffff;
<a name="l00175"></a>00175 t->f_recv = netsnmp_std_recv;
<a name="l00176"></a>00176 t->f_send = netsnmp_std_send;
<a name="l00177"></a>00177 t->f_close = netsnmp_std_close;
<a name="l00178"></a>00178 t->f_accept = netsnmp_std_accept;
<a name="l00179"></a>00179 t->f_fmtaddr = netsnmp_std_fmtaddr;
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">/*</span>
<a name="l00182"></a>00182 <span class="comment"> * if instring is not null length, it specifies a path to a prog</span>
<a name="l00183"></a>00183 <span class="comment"> * XXX: plus args</span>
<a name="l00184"></a>00184 <span class="comment"> */</span>
<a name="l00185"></a>00185 <span class="keywordflow">if</span> (instring_len == 0 && default_target != NULL) {
<a name="l00186"></a>00186 instring = default_target;
<a name="l00187"></a>00187 instring_len = strlen(default_target);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (instring_len != 0) {
<a name="l00191"></a>00191 <span class="keywordtype">int</span> infd[2], outfd[2]; <span class="comment">/* sockets to and from the client */</span>
<a name="l00192"></a>00192 <span class="keywordtype">int</span> childpid;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (pipe(infd) || pipe(outfd)) {
<a name="l00195"></a>00195 <a class="code" href="group__snmp__logging.html#ga9ba905368ea1c551b969af44b13e37c2" title="This snmp logging function allows variable argument list given the specified format and priority...">snmp_log</a>(LOG_ERR,
<a name="l00196"></a>00196 <span class="stringliteral">"Failed to create needed pipes for a STD transport"</span>);
<a name="l00197"></a>00197 netsnmp_transport_free(t);
<a name="l00198"></a>00198 <span class="keywordflow">return</span> NULL;
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200
<a name="l00201"></a>00201 childpid = fork();
<a name="l00202"></a>00202 <span class="comment">/* parentpid => childpid */</span>
<a name="l00203"></a>00203 <span class="comment">/* infd[1] => infd[0] */</span>
<a name="l00204"></a>00204 <span class="comment">/* outfd[0] <= outfd[1] */</span>
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keywordflow">if</span> (childpid) {
<a name="l00207"></a>00207 netsnmp_std_data *data;
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="comment">/* we're in the parent */</span>
<a name="l00210"></a>00210 close(infd[0]);
<a name="l00211"></a>00211 close(outfd[1]);
<a name="l00212"></a>00212
<a name="l00213"></a>00213 data = <a class="code" href="group__util.html#ga9cd013bb193de5048149afeb9d94e424" title="Mallocs memory of sizeof(t), zeros it and returns a pointer to it.">SNMP_MALLOC_TYPEDEF</a>(netsnmp_std_data);
<a name="l00214"></a>00214 <span class="keywordflow">if</span> (!data) {
<a name="l00215"></a>00215 <a class="code" href="group__snmp__logging.html#ga9ba905368ea1c551b969af44b13e37c2" title="This snmp logging function allows variable argument list given the specified format and priority...">snmp_log</a>(LOG_ERR, <span class="stringliteral">"snmpSTDDomain: memdup failed"</span>);
<a name="l00216"></a>00216 netsnmp_transport_free(t);
<a name="l00217"></a>00217 <span class="keywordflow">return</span> NULL;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 t->data = data;
<a name="l00220"></a>00220 t->data_length = <span class="keyword">sizeof</span>(netsnmp_std_data);
<a name="l00221"></a>00221 t->sock = outfd[0];
<a name="l00222"></a>00222 data->prog = strdup(instring);
<a name="l00223"></a>00223 data->outfd = infd[1];
<a name="l00224"></a>00224 data->childpid = childpid;
<a name="l00225"></a>00225 DEBUGMSGTL((<span class="stringliteral">"domain:std"</span>,<span class="stringliteral">"parent. data=%x\n"</span>, t->data));
<a name="l00226"></a>00226 } <span class="keywordflow">else</span> {
<a name="l00227"></a>00227 <span class="comment">/* we're in the child */</span>
<a name="l00228"></a>00228
<a name="l00229"></a>00229 <span class="comment">/* close stdin */</span>
<a name="l00230"></a>00230 close(0);
<a name="l00231"></a>00231 <span class="comment">/* copy pipe output to stdout */</span>
<a name="l00232"></a>00232 dup(infd[0]);
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="comment">/* close stdout */</span>
<a name="l00235"></a>00235 close(1);
<a name="l00236"></a>00236 <span class="comment">/* copy pipe output to stdin */</span>
<a name="l00237"></a>00237 dup(outfd[1]);
<a name="l00238"></a>00238
<a name="l00239"></a>00239 <span class="comment">/* close all the pipes themselves */</span>
<a name="l00240"></a>00240 close(infd[0]);
<a name="l00241"></a>00241 close(infd[1]);
<a name="l00242"></a>00242 close(outfd[0]);
<a name="l00243"></a>00243 close(outfd[1]);
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="comment">/* call exec */</span>
<a name="l00246"></a>00246 system(instring);
<a name="l00247"></a>00247 <span class="comment">/* XXX: TODO: use exec form instead; needs args */</span>
<a name="l00248"></a>00248 <span class="comment">/* execv(instring, NULL); */</span>
<a name="l00249"></a>00249 exit(0);
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="comment">/* ack... we should never ever get here */</span>
<a name="l00252"></a>00252 <a class="code" href="group__snmp__logging.html#ga9ba905368ea1c551b969af44b13e37c2" title="This snmp logging function allows variable argument list given the specified format and priority...">snmp_log</a>(LOG_ERR, <span class="stringliteral">"STD transport returned after execv()\n"</span>);
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="keywordflow">return</span> t;
<a name="l00257"></a>00257 }
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *
<a name="l00260"></a>00260 netsnmp_std_create_tstring(<span class="keyword">const</span> <span class="keywordtype">char</span> *instring, <span class="keywordtype">int</span> local,
<a name="l00261"></a>00261 <span class="keyword">const</span> <span class="keywordtype">char</span> *default_target)
<a name="l00262"></a>00262 {
<a name="l00263"></a>00263 <span class="keywordflow">return</span> netsnmp_std_transport(instring, strlen(instring), default_target);
<a name="l00264"></a>00264 }
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *
<a name="l00267"></a>00267 netsnmp_std_create_ostring(<span class="keyword">const</span> u_char * o, <span class="keywordtype">size_t</span> o_len, <span class="keywordtype">int</span> local)
<a name="l00268"></a>00268 {
<a name="l00269"></a>00269 <span class="keywordflow">return</span> netsnmp_std_transport((<span class="keyword">const</span> <span class="keywordtype">char</span>*)o, o_len, NULL);
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271
<a name="l00272"></a>00272 <span class="keywordtype">void</span>
<a name="l00273"></a>00273 netsnmp_std_ctor(<span class="keywordtype">void</span>)
<a name="l00274"></a>00274 {
<a name="l00275"></a>00275 stdDomain.name = netsnmp_snmpSTDDomain;
<a name="l00276"></a>00276 stdDomain.name_length = <span class="keyword">sizeof</span>(netsnmp_snmpSTDDomain) / <span class="keyword">sizeof</span>(oid);
<a name="l00277"></a>00277 stdDomain.prefix = (<span class="keyword">const</span> <span class="keywordtype">char</span> **)calloc(2, <span class="keyword">sizeof</span>(<span class="keywordtype">char</span> *));
<a name="l00278"></a>00278 stdDomain.prefix[0] = <span class="stringliteral">"std"</span>;
<a name="l00279"></a>00279
<a name="l00280"></a>00280 stdDomain.f_create_from_tstring_new = netsnmp_std_create_tstring;
<a name="l00281"></a>00281 stdDomain.f_create_from_ostring = netsnmp_std_create_ostring;
<a name="l00282"></a>00282
<a name="l00283"></a>00283 netsnmp_tdomain_register(&stdDomain);
<a name="l00284"></a>00284 }
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