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<div class="title">snmpTCPDomain.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 <errno.h></span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="preprocessor">#if HAVE_STRING_H</span>
<a name="l00008"></a>00008 <span class="preprocessor"></span><span class="preprocessor">#include <string.h></span>
<a name="l00009"></a>00009 <span class="preprocessor">#else</span>
<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#include <strings.h></span>
<a name="l00011"></a>00011 <span class="preprocessor">#endif</span>
<a name="l00012"></a>00012 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_STDLIB_H</span>
<a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#include <stdlib.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#endif</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_UNISTD_H</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#include <unistd.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#endif</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_SYS_SOCKET_H</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#include <sys/socket.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#endif</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_NETINET_IN_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#include <netinet/in.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#endif</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_ARPA_INET_H</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#include <arpa/inet.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#endif</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#if HAVE_FCNTL_H</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#include <fcntl.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#endif</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#if HAVE_WINSOCK_H</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#include <winsock2.h></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <ws2tcpip.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#endif</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span>
<a name="l00036"></a>00036 <span class="preprocessor">#if HAVE_DMALLOC_H</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#include <dmalloc.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#endif</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <net-snmp/types.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <net-snmp/output_api.h></span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="preprocessor">#include <net-snmp/library/snmp_transport.h></span>
<a name="l00044"></a>00044 <span class="preprocessor">#include <net-snmp/library/snmpUDPDomain.h></span>
<a name="l00045"></a>00045 <span class="preprocessor">#include <net-snmp/library/snmpTCPDomain.h></span>
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="comment">/* Copied from snmpUDPDomain.c */</span>
<a name="l00048"></a><a class="code" href="structnetsnmp__udp__addr__pair__s.html">00048</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair_s</a> {
<a name="l00049"></a>00049 <span class="keyword">struct </span>sockaddr_in remote_addr;
<a name="l00050"></a>00050 <span class="keyword">struct </span>in_addr local_addr;
<a name="l00051"></a>00051 } <a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a>;
<a name="l00052"></a>00052
<a name="l00053"></a>00053 oid netsnmp_snmpTCPDomain[] = { TRANSPORT_DOMAIN_TCP_IP };
<a name="l00054"></a>00054 <span class="keyword">static</span> <a class="code" href="structnetsnmp__tdomain__s.html">netsnmp_tdomain</a> tcpDomain;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="comment">/*</span>
<a name="l00057"></a>00057 <span class="comment"> * Not static since it is needed here as well as in snmpUDPDomain, but not</span>
<a name="l00058"></a>00058 <span class="comment"> * public either</span>
<a name="l00059"></a>00059 <span class="comment"> */</span>
<a name="l00060"></a>00060 <span class="keywordtype">int</span>
<a name="l00061"></a>00061 netsnmp_sockaddr_in2(<span class="keyword">struct</span> sockaddr_in *addr,
<a name="l00062"></a>00062 <span class="keyword">const</span> <span class="keywordtype">char</span> *inpeername, <span class="keyword">const</span> <span class="keywordtype">char</span> *default_target);
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">/*</span>
<a name="l00065"></a>00065 <span class="comment"> * Return a string representing the address in data, or else the "far end"</span>
<a name="l00066"></a>00066 <span class="comment"> * address if data is NULL. </span>
<a name="l00067"></a>00067 <span class="comment"> */</span>
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keyword">static</span> <span class="keywordtype">char</span> *
<a name="l00070"></a>00070 netsnmp_tcp_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="l00071"></a>00071 {
<a name="l00072"></a>00072 <a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *addr_pair = NULL;
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keywordflow">if</span> (data != NULL && len == <span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a>)) {
<a name="l00075"></a>00075 addr_pair = (<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *) data;
<a name="l00076"></a>00076 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (t != NULL && t->data != NULL) {
<a name="l00077"></a>00077 addr_pair = (<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *) t->data;
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keywordflow">if</span> (addr_pair == NULL) {
<a name="l00081"></a>00081 <span class="keywordflow">return</span> strdup(<span class="stringliteral">"TCP: unknown"</span>);
<a name="l00082"></a>00082 } <span class="keywordflow">else</span> {
<a name="l00083"></a>00083 <span class="keyword">struct </span>sockaddr_in *to = NULL;
<a name="l00084"></a>00084 <span class="keywordtype">char</span> tmp[64];
<a name="l00085"></a>00085 to = (<span class="keyword">struct </span>sockaddr_in *) &(addr_pair->remote_addr);
<a name="l00086"></a>00086 <span class="keywordflow">if</span> (to == NULL) {
<a name="l00087"></a>00087 <span class="keywordflow">return</span> strdup(<span class="stringliteral">"TCP: unknown"</span>);
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 sprintf(tmp, <span class="stringliteral">"TCP: [%s]:%hd"</span>,
<a name="l00091"></a>00091 inet_ntoa(to->sin_addr), ntohs(to->sin_port));
<a name="l00092"></a>00092 <span class="keywordflow">return</span> strdup(tmp);
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a>00096
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <span class="comment">/*</span>
<a name="l00099"></a>00099 <span class="comment"> * You can write something into opaque that will subsequently get passed back </span>
<a name="l00100"></a>00100 <span class="comment"> * to your send function if you like. For instance, you might want to</span>
<a name="l00101"></a>00101 <span class="comment"> * remember where a PDU came from, so that you can send a reply there... </span>
<a name="l00102"></a>00102 <span class="comment"> */</span>
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00105"></a>00105 netsnmp_tcp_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="l00106"></a>00106 <span class="keywordtype">void</span> **opaque, <span class="keywordtype">int</span> *olength)
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <span class="keywordtype">int</span> rc = -1;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="keywordflow">if</span> (t != NULL && t->sock >= 0) {
<a name="l00111"></a>00111 <span class="keywordflow">while</span> (rc < 0) {
<a name="l00112"></a>00112 rc = recv(t->sock, buf, size, 0);
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (rc < 0 && errno != EINTR) {
<a name="l00114"></a>00114 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"recv fd %d err %d (\"%s\")\n"</span>,
<a name="l00115"></a>00115 t->sock, errno, strerror(errno)));
<a name="l00116"></a>00116 <span class="keywordflow">break</span>;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"recv fd %d got %d bytes\n"</span>,
<a name="l00119"></a>00119 t->sock, rc));
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121 } <span class="keywordflow">else</span> {
<a name="l00122"></a>00122 <span class="keywordflow">return</span> -1;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (opaque != NULL && olength != NULL) {
<a name="l00126"></a>00126 <span class="keywordflow">if</span> (t->data_length > 0) {
<a name="l00127"></a>00127 <span class="keywordflow">if</span> ((*opaque = malloc(t->data_length)) != NULL) {
<a name="l00128"></a>00128 memcpy(*opaque, t->data, t->data_length);
<a name="l00129"></a>00129 *olength = t->data_length;
<a name="l00130"></a>00130 } <span class="keywordflow">else</span> {
<a name="l00131"></a>00131 *olength = 0;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 } <span class="keywordflow">else</span> {
<a name="l00134"></a>00134 *opaque = NULL;
<a name="l00135"></a>00135 *olength = 0;
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keywordflow">return</span> rc;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00145"></a>00145 netsnmp_tcp_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="l00146"></a>00146 <span class="keywordtype">void</span> **opaque, <span class="keywordtype">int</span> *olength)
<a name="l00147"></a>00147 {
<a name="l00148"></a>00148 <span class="keywordtype">int</span> rc = -1;
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (t != NULL && t->sock >= 0) {
<a name="l00151"></a>00151 <span class="keywordflow">while</span> (rc < 0) {
<a name="l00152"></a>00152 rc = send(t->sock, buf, size, 0);
<a name="l00153"></a>00153 <span class="keywordflow">if</span> (rc < 0 && errno != EINTR) {
<a name="l00154"></a>00154 <span class="keywordflow">break</span>;
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158 <span class="keywordflow">return</span> rc;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160
<a name="l00161"></a>00161
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00164"></a>00164 netsnmp_tcp_close(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t)
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="keywordtype">int</span> rc = -1;
<a name="l00167"></a>00167 <span class="keywordflow">if</span> (t != NULL && t->sock >= 0) {
<a name="l00168"></a>00168 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"close fd %d\n"</span>, t->sock));
<a name="l00169"></a>00169 <span class="preprocessor">#ifndef HAVE_CLOSESOCKET</span>
<a name="l00170"></a>00170 <span class="preprocessor"></span> rc = close(t->sock);
<a name="l00171"></a>00171 <span class="preprocessor">#else</span>
<a name="l00172"></a>00172 <span class="preprocessor"></span> rc = closesocket(t->sock);
<a name="l00173"></a>00173 <span class="preprocessor">#endif</span>
<a name="l00174"></a>00174 <span class="preprocessor"></span> t->sock = -1;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176 <span class="keywordflow">return</span> rc;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00182"></a>00182 netsnmp_tcp_accept(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t)
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 <span class="keyword">struct </span>sockaddr *farend = NULL;
<a name="l00185"></a>00185 <a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *addr_pair = NULL;
<a name="l00186"></a>00186 <span class="keywordtype">int</span> newsock = -1, sockflags = 0;
<a name="l00187"></a>00187 socklen_t farendlen = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>sockaddr_in);
<a name="l00188"></a>00188 <span class="keywordtype">char</span> *str = NULL;
<a name="l00189"></a>00189
<a name="l00190"></a>00190 addr_pair = (<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *)malloc(<span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a>));
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="keywordflow">if</span> (addr_pair == NULL) {
<a name="l00193"></a>00193 <span class="comment">/*</span>
<a name="l00194"></a>00194 <span class="comment"> * Indicate that the acceptance of this socket failed. </span>
<a name="l00195"></a>00195 <span class="comment"> */</span>
<a name="l00196"></a>00196 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"accept: malloc failed\n"</span>));
<a name="l00197"></a>00197 <span class="keywordflow">return</span> -1;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199 farend = (<span class="keyword">struct </span>sockaddr *) &(addr_pair->remote_addr);
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keywordflow">if</span> (t != NULL && t->sock >= 0) {
<a name="l00202"></a>00202 newsock = accept(t->sock, farend, &farendlen);
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="keywordflow">if</span> (newsock < 0) {
<a name="l00205"></a>00205 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"accept failed rc %d errno %d \"%s\"\n"</span>,
<a name="l00206"></a>00206 newsock, errno, strerror(errno)));
<a name="l00207"></a>00207 free(farend);
<a name="l00208"></a>00208 <span class="keywordflow">return</span> newsock;
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="keywordflow">if</span> (t->data != NULL) {
<a name="l00212"></a>00212 free(t->data);
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214
<a name="l00215"></a>00215 t->data = addr_pair;
<a name="l00216"></a>00216 t->data_length = <span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a>);
<a name="l00217"></a>00217 str = netsnmp_tcp_fmtaddr(NULL, farend, farendlen);
<a name="l00218"></a>00218 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"accept succeeded (from %s)\n"</span>, str));
<a name="l00219"></a>00219 free(str);
<a name="l00220"></a>00220
<a name="l00221"></a>00221 <span class="comment">/*</span>
<a name="l00222"></a>00222 <span class="comment"> * Try to make the new socket blocking. </span>
<a name="l00223"></a>00223 <span class="comment"> */</span>
<a name="l00224"></a>00224
<a name="l00225"></a>00225 <span class="preprocessor">#ifdef WIN32</span>
<a name="l00226"></a>00226 <span class="preprocessor"></span> ioctlsocket(newsock, FIONBIO, &sockflags);
<a name="l00227"></a>00227 <span class="preprocessor">#else</span>
<a name="l00228"></a>00228 <span class="preprocessor"></span> <span class="keywordflow">if</span> ((sockflags = fcntl(newsock, F_GETFL, 0)) >= 0) {
<a name="l00229"></a>00229 fcntl(newsock, F_SETFL, (sockflags & ~O_NONBLOCK));
<a name="l00230"></a>00230 } <span class="keywordflow">else</span> {
<a name="l00231"></a>00231 DEBUGMSGTL((<span class="stringliteral">"netsnmp_tcp"</span>, <span class="stringliteral">"couldn't f_getfl of fd %d\n"</span>,newsock));
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233 <span class="preprocessor">#endif</span>
<a name="l00234"></a>00234 <span class="preprocessor"></span>
<a name="l00235"></a>00235 <span class="comment">/*</span>
<a name="l00236"></a>00236 <span class="comment"> * Allow user to override the send and receive buffers. Default is</span>
<a name="l00237"></a>00237 <span class="comment"> * to use os default. Don't worry too much about errors --</span>
<a name="l00238"></a>00238 <span class="comment"> * just plough on regardless. </span>
<a name="l00239"></a>00239 <span class="comment"> */</span>
<a name="l00240"></a>00240 netsnmp_sock_buffer_set(newsock, SO_SNDBUF, 1, 0);
<a name="l00241"></a>00241 netsnmp_sock_buffer_set(newsock, SO_RCVBUF, 1, 0);
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="keywordflow">return</span> newsock;
<a name="l00244"></a>00244 } <span class="keywordflow">else</span> {
<a name="l00245"></a>00245 free(farend);
<a name="l00246"></a>00246 <span class="keywordflow">return</span> -1;
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248 }
<a name="l00249"></a>00249
<a name="l00250"></a>00250
<a name="l00251"></a>00251
<a name="l00252"></a>00252 <span class="comment">/*</span>
<a name="l00253"></a>00253 <span class="comment"> * Open a TCP-based transport for SNMP. Local is TRUE if addr is the local</span>
<a name="l00254"></a>00254 <span class="comment"> * address to bind to (i.e. this is a server-type session); otherwise addr is </span>
<a name="l00255"></a>00255 <span class="comment"> * the remote address to send things to. </span>
<a name="l00256"></a>00256 <span class="comment"> */</span>
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *
<a name="l00259"></a>00259 netsnmp_tcp_transport(<span class="keyword">struct</span> sockaddr_in *addr, <span class="keywordtype">int</span> local)
<a name="l00260"></a>00260 {
<a name="l00261"></a>00261 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *t = NULL;
<a name="l00262"></a>00262 <a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *addr_pair = NULL;
<a name="l00263"></a>00263 <span class="keywordtype">int</span> rc = 0;
<a name="l00264"></a>00264
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="keywordflow">if</span> (addr == NULL || addr->sin_family != AF_INET) {
<a name="l00267"></a>00267 <span class="keywordflow">return</span> NULL;
<a name="l00268"></a>00268 }
<a name="l00269"></a>00269
<a name="l00270"></a>00270 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="l00271"></a>00271 <span class="keywordflow">if</span> (t == NULL) {
<a name="l00272"></a>00272 <span class="keywordflow">return</span> NULL;
<a name="l00273"></a>00273 }
<a name="l00274"></a>00274 memset(t, 0, <span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a>));
<a name="l00275"></a>00275
<a name="l00276"></a>00276 addr_pair = (<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a> *)malloc(<span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a>));
<a name="l00277"></a>00277 <span class="keywordflow">if</span> (addr_pair == NULL) {
<a name="l00278"></a>00278 netsnmp_transport_free(t);
<a name="l00279"></a>00279 <span class="keywordflow">return</span> NULL;
<a name="l00280"></a>00280 }
<a name="l00281"></a>00281 t->data = addr_pair;
<a name="l00282"></a>00282 t->data_length = <span class="keyword">sizeof</span>(<a class="code" href="structnetsnmp__udp__addr__pair__s.html">netsnmp_udp_addr_pair</a>);
<a name="l00283"></a>00283 memcpy(&(addr_pair->remote_addr), addr, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr_in));
<a name="l00284"></a>00284
<a name="l00285"></a>00285 t->domain = netsnmp_snmpTCPDomain;
<a name="l00286"></a>00286 t->domain_length =
<a name="l00287"></a>00287 <span class="keyword">sizeof</span>(netsnmp_snmpTCPDomain) / <span class="keyword">sizeof</span>(netsnmp_snmpTCPDomain[0]);
<a name="l00288"></a>00288
<a name="l00289"></a>00289 t->sock = socket(PF_INET, SOCK_STREAM, 0);
<a name="l00290"></a>00290 <span class="keywordflow">if</span> (t->sock < 0) {
<a name="l00291"></a>00291 netsnmp_transport_free(t);
<a name="l00292"></a>00292 <span class="keywordflow">return</span> NULL;
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294
<a name="l00295"></a>00295 t->flags = NETSNMP_TRANSPORT_FLAG_STREAM;
<a name="l00296"></a>00296
<a name="l00297"></a>00297 <span class="keywordflow">if</span> (local) {
<a name="l00298"></a>00298 <span class="keywordtype">int</span> sockflags = 0, opt = 1;
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="comment">/*</span>
<a name="l00301"></a>00301 <span class="comment"> * This session is inteneded as a server, so we must bind to the given </span>
<a name="l00302"></a>00302 <span class="comment"> * IP address (which may include an interface address, or could be</span>
<a name="l00303"></a>00303 <span class="comment"> * INADDR_ANY, but will always include a port number. </span>
<a name="l00304"></a>00304 <span class="comment"> */</span>
<a name="l00305"></a>00305
<a name="l00306"></a>00306 t->flags |= NETSNMP_TRANSPORT_FLAG_LISTEN;
<a name="l00307"></a>00307 t->local = (u_char *)malloc(6);
<a name="l00308"></a>00308 <span class="keywordflow">if</span> (t->local == NULL) {
<a name="l00309"></a>00309 netsnmp_tcp_close(t);
<a name="l00310"></a>00310 netsnmp_transport_free(t);
<a name="l00311"></a>00311 <span class="keywordflow">return</span> NULL;
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313 memcpy(t->local, (u_char *) & (addr->sin_addr.s_addr), 4);
<a name="l00314"></a>00314 t->local[4] = (htons(addr->sin_port) & 0xff00) >> 8;
<a name="l00315"></a>00315 t->local[5] = (htons(addr->sin_port) & 0x00ff) >> 0;
<a name="l00316"></a>00316 t->local_length = 6;
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="comment">/*</span>
<a name="l00319"></a>00319 <span class="comment"> * We should set SO_REUSEADDR too. </span>
<a name="l00320"></a>00320 <span class="comment"> */</span>
<a name="l00321"></a>00321
<a name="l00322"></a>00322 setsockopt(t->sock, SOL_SOCKET, SO_REUSEADDR, (<span class="keywordtype">void</span> *)&opt,
<a name="l00323"></a>00323 <span class="keyword">sizeof</span>(opt));
<a name="l00324"></a>00324
<a name="l00325"></a>00325 rc = bind(t->sock, (<span class="keyword">struct</span> sockaddr *)addr, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr));
<a name="l00326"></a>00326 <span class="keywordflow">if</span> (rc != 0) {
<a name="l00327"></a>00327 netsnmp_tcp_close(t);
<a name="l00328"></a>00328 netsnmp_transport_free(t);
<a name="l00329"></a>00329 <span class="keywordflow">return</span> NULL;
<a name="l00330"></a>00330 }
<a name="l00331"></a>00331
<a name="l00332"></a>00332 <span class="comment">/*</span>
<a name="l00333"></a>00333 <span class="comment"> * Since we are going to be letting select() tell us when connections</span>
<a name="l00334"></a>00334 <span class="comment"> * are ready to be accept()ed, we need to make the socket n0n-blocking</span>
<a name="l00335"></a>00335 <span class="comment"> * to avoid the race condition described in W. R. Stevens, ``Unix</span>
<a name="l00336"></a>00336 <span class="comment"> * Network Programming Volume I Second Edition'', pp. 422--4, which</span>
<a name="l00337"></a>00337 <span class="comment"> * could otherwise wedge the agent.</span>
<a name="l00338"></a>00338 <span class="comment"> */</span>
<a name="l00339"></a>00339
<a name="l00340"></a>00340 <span class="preprocessor">#ifdef WIN32</span>
<a name="l00341"></a>00341 <span class="preprocessor"></span> opt = 1;
<a name="l00342"></a>00342 ioctlsocket(t->sock, FIONBIO, &opt);
<a name="l00343"></a>00343 <span class="preprocessor">#else</span>
<a name="l00344"></a>00344 <span class="preprocessor"></span> sockflags = fcntl(t->sock, F_GETFL, 0);
<a name="l00345"></a>00345 fcntl(t->sock, F_SETFL, sockflags | O_NONBLOCK);
<a name="l00346"></a>00346 <span class="preprocessor">#endif</span>
<a name="l00347"></a>00347 <span class="preprocessor"></span>
<a name="l00348"></a>00348 <span class="comment">/*</span>
<a name="l00349"></a>00349 <span class="comment"> * Now sit here and wait for connections to arrive. </span>
<a name="l00350"></a>00350 <span class="comment"> */</span>
<a name="l00351"></a>00351
<a name="l00352"></a>00352 rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
<a name="l00353"></a>00353 <span class="keywordflow">if</span> (rc != 0) {
<a name="l00354"></a>00354 netsnmp_tcp_close(t);
<a name="l00355"></a>00355 netsnmp_transport_free(t);
<a name="l00356"></a>00356 <span class="keywordflow">return</span> NULL;
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="comment">/*</span>
<a name="l00360"></a>00360 <span class="comment"> * no buffer size on listen socket - doesn't make sense</span>
<a name="l00361"></a>00361 <span class="comment"> */</span>
<a name="l00362"></a>00362
<a name="l00363"></a>00363 } <span class="keywordflow">else</span> {
<a name="l00364"></a>00364 t->remote = (u_char *)malloc(6);
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (t->remote == NULL) {
<a name="l00366"></a>00366 netsnmp_tcp_close(t);
<a name="l00367"></a>00367 netsnmp_transport_free(t);
<a name="l00368"></a>00368 <span class="keywordflow">return</span> NULL;
<a name="l00369"></a>00369 }
<a name="l00370"></a>00370 memcpy(t->remote, (u_char *) & (addr->sin_addr.s_addr), 4);
<a name="l00371"></a>00371 t->remote[4] = (htons(addr->sin_port) & 0xff00) >> 8;
<a name="l00372"></a>00372 t->remote[5] = (htons(addr->sin_port) & 0x00ff) >> 0;
<a name="l00373"></a>00373 t->remote_length = 6;
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="comment">/*</span>
<a name="l00376"></a>00376 <span class="comment"> * This is a client-type session, so attempt to connect to the far</span>
<a name="l00377"></a>00377 <span class="comment"> * end. We don't go non-blocking here because it's not obvious what</span>
<a name="l00378"></a>00378 <span class="comment"> * you'd then do if you tried to do snmp_sends before the connection</span>
<a name="l00379"></a>00379 <span class="comment"> * had completed. So this can block.</span>
<a name="l00380"></a>00380 <span class="comment"> */</span>
<a name="l00381"></a>00381
<a name="l00382"></a>00382 rc = connect(t->sock, (<span class="keyword">struct</span> sockaddr *)addr,
<a name="l00383"></a>00383 <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr));
<a name="l00384"></a>00384
<a name="l00385"></a>00385 <span class="keywordflow">if</span> (rc < 0) {
<a name="l00386"></a>00386 netsnmp_tcp_close(t);
<a name="l00387"></a>00387 netsnmp_transport_free(t);
<a name="l00388"></a>00388 <span class="keywordflow">return</span> NULL;
<a name="l00389"></a>00389 }
<a name="l00390"></a>00390
<a name="l00391"></a>00391 <span class="comment">/*</span>
<a name="l00392"></a>00392 <span class="comment"> * Allow user to override the send and receive buffers. Default is</span>
<a name="l00393"></a>00393 <span class="comment"> * to use os default. Don't worry too much about errors --</span>
<a name="l00394"></a>00394 <span class="comment"> * just plough on regardless. </span>
<a name="l00395"></a>00395 <span class="comment"> */</span>
<a name="l00396"></a>00396 netsnmp_sock_buffer_set(t->sock, SO_SNDBUF, local, 0);
<a name="l00397"></a>00397 netsnmp_sock_buffer_set(t->sock, SO_RCVBUF, local, 0);
<a name="l00398"></a>00398 }
<a name="l00399"></a>00399
<a name="l00400"></a>00400 <span class="comment">/*</span>
<a name="l00401"></a>00401 <span class="comment"> * Message size is not limited by this transport (hence msgMaxSize</span>
<a name="l00402"></a>00402 <span class="comment"> * is equal to the maximum legal size of an SNMP message). </span>
<a name="l00403"></a>00403 <span class="comment"> */</span>
<a name="l00404"></a>00404
<a name="l00405"></a>00405 t->msgMaxSize = 0x7fffffff;
<a name="l00406"></a>00406 t->f_recv = netsnmp_tcp_recv;
<a name="l00407"></a>00407 t->f_send = netsnmp_tcp_send;
<a name="l00408"></a>00408 t->f_close = netsnmp_tcp_close;
<a name="l00409"></a>00409 t->f_accept = netsnmp_tcp_accept;
<a name="l00410"></a>00410 t->f_fmtaddr = netsnmp_tcp_fmtaddr;
<a name="l00411"></a>00411
<a name="l00412"></a>00412 <span class="keywordflow">return</span> t;
<a name="l00413"></a>00413 }
<a name="l00414"></a>00414
<a name="l00415"></a>00415
<a name="l00416"></a>00416
<a name="l00417"></a>00417 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *
<a name="l00418"></a>00418 netsnmp_tcp_create_tstring(<span class="keyword">const</span> <span class="keywordtype">char</span> *str, <span class="keywordtype">int</span> local,
<a name="l00419"></a>00419 <span class="keyword">const</span> <span class="keywordtype">char</span> *default_target)
<a name="l00420"></a>00420 {
<a name="l00421"></a>00421 <span class="keyword">struct </span>sockaddr_in addr;
<a name="l00422"></a>00422
<a name="l00423"></a>00423 <span class="keywordflow">if</span> (netsnmp_sockaddr_in2(&addr, str, default_target)) {
<a name="l00424"></a>00424 <span class="keywordflow">return</span> netsnmp_tcp_transport(&addr, local);
<a name="l00425"></a>00425 } <span class="keywordflow">else</span> {
<a name="l00426"></a>00426 <span class="keywordflow">return</span> NULL;
<a name="l00427"></a>00427 }
<a name="l00428"></a>00428 }
<a name="l00429"></a>00429
<a name="l00430"></a>00430
<a name="l00431"></a>00431
<a name="l00432"></a>00432 <a class="code" href="structnetsnmp__transport__s.html">netsnmp_transport</a> *
<a name="l00433"></a>00433 netsnmp_tcp_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="l00434"></a>00434 {
<a name="l00435"></a>00435 <span class="keyword">struct </span>sockaddr_in addr;
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <span class="keywordflow">if</span> (o_len == 6) {
<a name="l00438"></a>00438 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> porttmp = (o[4] << 8) + o[5];
<a name="l00439"></a>00439 addr.sin_family = AF_INET;
<a name="l00440"></a>00440 memcpy((u_char *) & (addr.sin_addr.s_addr), o, 4);
<a name="l00441"></a>00441 addr.sin_port = htons(porttmp);
<a name="l00442"></a>00442 <span class="keywordflow">return</span> netsnmp_tcp_transport(&addr, local);
<a name="l00443"></a>00443 }
<a name="l00444"></a>00444 <span class="keywordflow">return</span> NULL;
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446
<a name="l00447"></a>00447
<a name="l00448"></a>00448
<a name="l00449"></a>00449 <span class="keywordtype">void</span>
<a name="l00450"></a>00450 netsnmp_tcp_ctor(<span class="keywordtype">void</span>)
<a name="l00451"></a>00451 {
<a name="l00452"></a>00452 tcpDomain.name = netsnmp_snmpTCPDomain;
<a name="l00453"></a>00453 tcpDomain.name_length = <span class="keyword">sizeof</span>(netsnmp_snmpTCPDomain) / <span class="keyword">sizeof</span>(oid);
<a name="l00454"></a>00454 tcpDomain.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="l00455"></a>00455 tcpDomain.prefix[0] = <span class="stringliteral">"tcp"</span>;
<a name="l00456"></a>00456
<a name="l00457"></a>00457 tcpDomain.f_create_from_tstring_new = netsnmp_tcp_create_tstring;
<a name="l00458"></a>00458 tcpDomain.f_create_from_ostring = netsnmp_tcp_create_ostring;
<a name="l00459"></a>00459
<a name="l00460"></a>00460 netsnmp_tdomain_register(&tcpDomain);
<a name="l00461"></a>00461 }
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