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+<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
+<title>libnet: bpf.h Source File</title>
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+<!-- Generated by Doxygen 1.3.4 -->
+<div class="qindex"><a class="qindex" href="index.html">Main&nbsp;Page</a> | <a class="qindex" href="annotated.html">Data&nbsp;Structures</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="functions.html">Data&nbsp;Fields</a> | <a class="qindex" href="globals.html">Globals</a></div>
+<h1>bpf.h</h1><div class="fragment"><pre>00001 <span class="comment">/*-</span>
+00002 <span class="comment"> * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997</span>
+00003 <span class="comment"> * The Regents of the University of California. All rights reserved.</span>
+00004 <span class="comment"> *</span>
+00005 <span class="comment"> * This code is derived from the Stanford/CMU enet packet filter,</span>
+00006 <span class="comment"> * (net/enet.c) distributed as part of 4.3BSD, and code contributed</span>
+00007 <span class="comment"> * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence </span>
+00008 <span class="comment"> * Berkeley Laboratory.</span>
+00009 <span class="comment"> *</span>
+00010 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
+00011 <span class="comment"> * modification, are permitted provided that the following conditions</span>
+00012 <span class="comment"> * are met:</span>
+00013 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
+00014 <span class="comment"> * notice, this list of conditions and the following disclaimer.</span>
+00015 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
+00016 <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span>
+00017 <span class="comment"> * documentation and/or other materials provided with the distribution.</span>
+00018 <span class="comment"> * 3. All advertising materials mentioning features or use of this software</span>
+00019 <span class="comment"> * must display the following acknowledgement:</span>
+00020 <span class="comment"> * This product includes software developed by the University of</span>
+00021 <span class="comment"> * California, Berkeley and its contributors.</span>
+00022 <span class="comment"> * 4. Neither the name of the University nor the names of its contributors</span>
+00023 <span class="comment"> * may be used to endorse or promote products derived from this software</span>
+00024 <span class="comment"> * without specific prior written permission.</span>
+00025 <span class="comment"> *</span>
+00026 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND</span>
+00027 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span>
+00028 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span>
+00029 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE</span>
+00030 <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span>
+00031 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS</span>
+00032 <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
+00033 <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span>
+00034 <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY</span>
+00035 <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF</span>
+00036 <span class="comment"> * SUCH DAMAGE.</span>
+00037 <span class="comment"> *</span>
+00038 <span class="comment"> * @(#)bpf.h 7.1 (Berkeley) 5/7/91</span>
+00039 <span class="comment"> *</span>
+00040 <span class="comment"> * @(#) $Header: /usr/local/CVS/libnet/include/bpf.h,v 1.1.1.1 2003/06/26 21:55:10 route Exp $ (LBL)</span>
+00041 <span class="comment"> */</span>
+00042
+00043 <span class="preprocessor">#ifndef BPF_MAJOR_VERSION</span>
+00044 <span class="preprocessor"></span>
+00045 <span class="comment">/* BSD style release date */</span>
+00046 <span class="preprocessor">#define BPF_RELEASE 199606</span>
+00047 <span class="preprocessor"></span>
+00048 <span class="keyword">typedef</span> <span class="keywordtype">int</span> bpf_int32;
+00049 <span class="keyword">typedef</span> u_int bpf_u_int32;
+00050
+00051 <span class="comment">/*</span>
+00052 <span class="comment"> * Alignment macros. BPF_WORDALIGN rounds up to the next </span>
+00053 <span class="comment"> * even multiple of BPF_ALIGNMENT. </span>
+00054 <span class="comment"> */</span>
+00055 <span class="preprocessor">#define BPF_ALIGNMENT sizeof(bpf_int32)</span>
+00056 <span class="preprocessor"></span><span class="preprocessor">#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&amp;~(BPF_ALIGNMENT-1))</span>
+00057 <span class="preprocessor"></span>
+00058 <span class="preprocessor">#define BPF_MAXINSNS 512</span>
+00059 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MAXBUFSIZE 0x8000</span>
+00060 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MINBUFSIZE 32</span>
+00061 <span class="preprocessor"></span>
+00062 <span class="comment">/*</span>
+00063 <span class="comment"> * Structure for BIOCSETF.</span>
+00064 <span class="comment"> */</span>
+00065 <span class="keyword">struct </span>bpf_program {
+00066 u_int bf_len;
+00067 <span class="keyword">struct </span>bpf_insn *bf_insns;
+00068 };
+00069
+00070 <span class="comment">/*</span>
+00071 <span class="comment"> * Struct returned by BIOCGSTATS.</span>
+00072 <span class="comment"> */</span>
+00073 <span class="keyword">struct </span>bpf_stat {
+00074 u_int bs_recv; <span class="comment">/* number of packets received */</span>
+00075 u_int bs_drop; <span class="comment">/* number of packets dropped */</span>
+00076 };
+00077
+00078 <span class="comment">/*</span>
+00079 <span class="comment"> * Struct return by BIOCVERSION. This represents the version number of </span>
+00080 <span class="comment"> * the filter language described by the instruction encodings below.</span>
+00081 <span class="comment"> * bpf understands a program iff kernel_major == filter_major &amp;&amp;</span>
+00082 <span class="comment"> * kernel_minor &gt;= filter_minor, that is, if the value returned by the</span>
+00083 <span class="comment"> * running kernel has the same major number and a minor number equal</span>
+00084 <span class="comment"> * equal to or less than the filter being downloaded. Otherwise, the</span>
+00085 <span class="comment"> * results are undefined, meaning an error may be returned or packets</span>
+00086 <span class="comment"> * may be accepted haphazardly.</span>
+00087 <span class="comment"> * It has nothing to do with the source code version.</span>
+00088 <span class="comment"> */</span>
+00089 <span class="keyword">struct </span>bpf_version {
+00090 u_short bv_major;
+00091 u_short bv_minor;
+00092 };
+00093 <span class="comment">/* Current version number of filter architecture. */</span>
+00094 <span class="preprocessor">#define BPF_MAJOR_VERSION 1</span>
+00095 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MINOR_VERSION 1</span>
+00096 <span class="preprocessor"></span>
+00097 <span class="comment">/*</span>
+00098 <span class="comment"> * BPF ioctls</span>
+00099 <span class="comment"> *</span>
+00100 <span class="comment"> * The first set is for compatibility with Sun's pcc style</span>
+00101 <span class="comment"> * header files. If your using gcc, we assume that you</span>
+00102 <span class="comment"> * have run fixincludes so the latter set should work.</span>
+00103 <span class="comment"> */</span>
+00104 <span class="preprocessor">#if (defined(sun) || defined(ibm032)) &amp;&amp; !defined(__GNUC__)</span>
+00105 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGBLEN _IOR(B,102, u_int)</span>
+00106 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSBLEN _IOWR(B,102, u_int)</span>
+00107 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSETF _IOW(B,103, struct bpf_program)</span>
+00108 <span class="preprocessor"></span><span class="preprocessor">#define BIOCFLUSH _IO(B,104)</span>
+00109 <span class="preprocessor"></span><span class="preprocessor">#define BIOCPROMISC _IO(B,105)</span>
+00110 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGDLT _IOR(B,106, u_int)</span>
+00111 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGETIF _IOR(B,107, struct ifreq)</span>
+00112 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSETIF _IOW(B,108, struct ifreq)</span>
+00113 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSRTIMEOUT _IOW(B,109, struct timeval)</span>
+00114 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGRTIMEOUT _IOR(B,110, struct timeval)</span>
+00115 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGSTATS _IOR(B,111, struct bpf_stat)</span>
+00116 <span class="preprocessor"></span><span class="preprocessor">#define BIOCIMMEDIATE _IOW(B,112, u_int)</span>
+00117 <span class="preprocessor"></span><span class="preprocessor">#define BIOCVERSION _IOR(B,113, struct bpf_version)</span>
+00118 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSTCPF _IOW(B,114, struct bpf_program)</span>
+00119 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSUDPF _IOW(B,115, struct bpf_program)</span>
+00120 <span class="preprocessor"></span><span class="preprocessor">#else</span>
+00121 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGBLEN _IOR('B',102, u_int)</span>
+00122 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSBLEN _IOWR('B',102, u_int)</span>
+00123 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSETF _IOW('B',103, struct bpf_program)</span>
+00124 <span class="preprocessor"></span><span class="preprocessor">#define BIOCFLUSH _IO('B',104)</span>
+00125 <span class="preprocessor"></span><span class="preprocessor">#define BIOCPROMISC _IO('B',105)</span>
+00126 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGDLT _IOR('B',106, u_int)</span>
+00127 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGETIF _IOR('B',107, struct ifreq)</span>
+00128 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSETIF _IOW('B',108, struct ifreq)</span>
+00129 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSRTIMEOUT _IOW('B',109, struct timeval)</span>
+00130 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGRTIMEOUT _IOR('B',110, struct timeval)</span>
+00131 <span class="preprocessor"></span><span class="preprocessor">#define BIOCGSTATS _IOR('B',111, struct bpf_stat)</span>
+00132 <span class="preprocessor"></span><span class="preprocessor">#define BIOCIMMEDIATE _IOW('B',112, u_int)</span>
+00133 <span class="preprocessor"></span><span class="preprocessor">#define BIOCVERSION _IOR('B',113, struct bpf_version)</span>
+00134 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSTCPF _IOW('B',114, struct bpf_program)</span>
+00135 <span class="preprocessor"></span><span class="preprocessor">#define BIOCSUDPF _IOW('B',115, struct bpf_program)</span>
+00136 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
+00137 <span class="preprocessor"></span>
+00138 <span class="comment">/*</span>
+00139 <span class="comment"> * Structure prepended to each packet.</span>
+00140 <span class="comment"> */</span>
+00141 <span class="keyword">struct </span>bpf_hdr {
+00142 <span class="keyword">struct </span>timeval bh_tstamp; <span class="comment">/* time stamp */</span>
+00143 bpf_u_int32 bh_caplen; <span class="comment">/* length of captured portion */</span>
+00144 bpf_u_int32 bh_datalen; <span class="comment">/* original length of packet */</span>
+00145 u_short bh_hdrlen; <span class="comment">/* length of bpf header (this struct</span>
+00146 <span class="comment"> plus alignment padding) */</span>
+00147 };
+00148 <span class="comment">/*</span>
+00149 <span class="comment"> * Because the structure above is not a multiple of 4 bytes, some compilers</span>
+00150 <span class="comment"> * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work.</span>
+00151 <span class="comment"> * Only the kernel needs to know about it; applications use bh_hdrlen.</span>
+00152 <span class="comment"> */</span>
+00153 <span class="preprocessor">#ifdef KERNEL</span>
+00154 <span class="preprocessor"></span><span class="preprocessor">#define SIZEOF_BPF_HDR 18</span>
+00155 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
+00156 <span class="preprocessor"></span>
+00157 <span class="comment">/*</span>
+00158 <span class="comment"> * Data-link level type codes.</span>
+00159 <span class="comment"> */</span>
+00160 <span class="preprocessor">#define DLT_NULL 0 </span><span class="comment">/* no link-layer encapsulation */</span>
+00161 <span class="preprocessor">#define DLT_EN10MB 1 </span><span class="comment">/* Ethernet (10Mb) */</span>
+00162 <span class="preprocessor">#define DLT_EN3MB 2 </span><span class="comment">/* Experimental Ethernet (3Mb) */</span>
+00163 <span class="preprocessor">#define DLT_AX25 3 </span><span class="comment">/* Amateur Radio AX.25 */</span>
+00164 <span class="preprocessor">#define DLT_PRONET 4 </span><span class="comment">/* Proteon ProNET Token Ring */</span>
+00165 <span class="preprocessor">#define DLT_CHAOS 5 </span><span class="comment">/* Chaos */</span>
+00166 <span class="preprocessor">#define DLT_IEEE802 6 </span><span class="comment">/* IEEE 802 Networks */</span>
+00167 <span class="preprocessor">#define DLT_ARCNET 7 </span><span class="comment">/* ARCNET */</span>
+00168 <span class="preprocessor">#define DLT_SLIP 8 </span><span class="comment">/* Serial Line IP */</span>
+00169 <span class="preprocessor">#define DLT_PPP 9 </span><span class="comment">/* Point-to-point Protocol */</span>
+00170 <span class="preprocessor">#define DLT_FDDI 10 </span><span class="comment">/* FDDI */</span>
+00171 <span class="preprocessor">#define DLT_ATM_RFC1483 11 </span><span class="comment">/* LLC/SNAP encapsulated atm */</span>
+00172 <span class="preprocessor">#define DLT_RAW 12 </span><span class="comment">/* raw IP */</span>
+00173 <span class="preprocessor">#define DLT_SLIP_BSDOS 13 </span><span class="comment">/* BSD/OS Serial Line IP */</span>
+00174 <span class="preprocessor">#define DLT_PPP_BSDOS 14 </span><span class="comment">/* BSD/OS Point-to-point Protocol */</span>
+00175
+00176 <span class="comment">/*</span>
+00177 <span class="comment"> * The instruction encondings.</span>
+00178 <span class="comment"> */</span>
+00179 <span class="comment">/* instruction classes */</span>
+00180 <span class="preprocessor">#define BPF_CLASS(code) ((code) &amp; 0x07)</span>
+00181 <span class="preprocessor"></span><span class="preprocessor">#define BPF_LD 0x00</span>
+00182 <span class="preprocessor"></span><span class="preprocessor">#define BPF_LDX 0x01</span>
+00183 <span class="preprocessor"></span><span class="preprocessor">#define BPF_ST 0x02</span>
+00184 <span class="preprocessor"></span><span class="preprocessor">#define BPF_STX 0x03</span>
+00185 <span class="preprocessor"></span><span class="preprocessor">#define BPF_ALU 0x04</span>
+00186 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JMP 0x05</span>
+00187 <span class="preprocessor"></span><span class="preprocessor">#define BPF_RET 0x06</span>
+00188 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MISC 0x07</span>
+00189 <span class="preprocessor"></span>
+00190 <span class="comment">/* ld/ldx fields */</span>
+00191 <span class="preprocessor">#define BPF_SIZE(code) ((code) &amp; 0x18)</span>
+00192 <span class="preprocessor"></span><span class="preprocessor">#define BPF_W 0x00</span>
+00193 <span class="preprocessor"></span><span class="preprocessor">#define BPF_H 0x08</span>
+00194 <span class="preprocessor"></span><span class="preprocessor">#define BPF_B 0x10</span>
+00195 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MODE(code) ((code) &amp; 0xe0)</span>
+00196 <span class="preprocessor"></span><span class="preprocessor">#define BPF_IMM 0x00</span>
+00197 <span class="preprocessor"></span><span class="preprocessor">#define BPF_ABS 0x20</span>
+00198 <span class="preprocessor"></span><span class="preprocessor">#define BPF_IND 0x40</span>
+00199 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MEM 0x60</span>
+00200 <span class="preprocessor"></span><span class="preprocessor">#define BPF_LEN 0x80</span>
+00201 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MSH 0xa0</span>
+00202 <span class="preprocessor"></span>
+00203 <span class="comment">/* alu/jmp fields */</span>
+00204 <span class="preprocessor">#define BPF_OP(code) ((code) &amp; 0xf0)</span>
+00205 <span class="preprocessor"></span><span class="preprocessor">#define BPF_ADD 0x00</span>
+00206 <span class="preprocessor"></span><span class="preprocessor">#define BPF_SUB 0x10</span>
+00207 <span class="preprocessor"></span><span class="preprocessor">#define BPF_MUL 0x20</span>
+00208 <span class="preprocessor"></span><span class="preprocessor">#define BPF_DIV 0x30</span>
+00209 <span class="preprocessor"></span><span class="preprocessor">#define BPF_OR 0x40</span>
+00210 <span class="preprocessor"></span><span class="preprocessor">#define BPF_AND 0x50</span>
+00211 <span class="preprocessor"></span><span class="preprocessor">#define BPF_LSH 0x60</span>
+00212 <span class="preprocessor"></span><span class="preprocessor">#define BPF_RSH 0x70</span>
+00213 <span class="preprocessor"></span><span class="preprocessor">#define BPF_NEG 0x80</span>
+00214 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JA 0x00</span>
+00215 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JEQ 0x10</span>
+00216 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JGT 0x20</span>
+00217 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JGE 0x30</span>
+00218 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JSET 0x40</span>
+00219 <span class="preprocessor"></span><span class="preprocessor">#define BPF_SRC(code) ((code) &amp; 0x08)</span>
+00220 <span class="preprocessor"></span><span class="preprocessor">#define BPF_K 0x00</span>
+00221 <span class="preprocessor"></span><span class="preprocessor">#define BPF_X 0x08</span>
+00222 <span class="preprocessor"></span>
+00223 <span class="comment">/* ret - BPF_K and BPF_X also apply */</span>
+00224 <span class="preprocessor">#define BPF_RVAL(code) ((code) &amp; 0x18)</span>
+00225 <span class="preprocessor"></span><span class="preprocessor">#define BPF_A 0x10</span>
+00226 <span class="preprocessor"></span>
+00227 <span class="comment">/* misc */</span>
+00228 <span class="preprocessor">#define BPF_MISCOP(code) ((code) &amp; 0xf8)</span>
+00229 <span class="preprocessor"></span><span class="preprocessor">#define BPF_TAX 0x00</span>
+00230 <span class="preprocessor"></span><span class="preprocessor">#define BPF_TXA 0x80</span>
+00231 <span class="preprocessor"></span>
+00232 <span class="comment">/*</span>
+00233 <span class="comment"> * The instruction data structure.</span>
+00234 <span class="comment"> */</span>
+00235 <span class="keyword">struct </span>bpf_insn {
+00236 u_short code;
+00237 u_char jt;
+00238 u_char jf;
+00239 bpf_int32 k;
+00240 };
+00241
+00242 <span class="comment">/*</span>
+00243 <span class="comment"> * Macros for insn array initializers.</span>
+00244 <span class="comment"> */</span>
+00245 <span class="preprocessor">#define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }</span>
+00246 <span class="preprocessor"></span><span class="preprocessor">#define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }</span>
+00247 <span class="preprocessor"></span>
+00248 <span class="preprocessor">#ifdef KERNEL</span>
+00249 <span class="preprocessor"></span><span class="keyword">extern</span> u_int bpf_filter();
+00250 <span class="keyword">extern</span> <span class="keywordtype">void</span> bpfattach();
+00251 <span class="keyword">extern</span> <span class="keywordtype">void</span> bpf_tap();
+00252 <span class="keyword">extern</span> <span class="keywordtype">void</span> bpf_mtap();
+00253 <span class="preprocessor">#else</span>
+00254 <span class="preprocessor"></span><span class="preprocessor">#if __STDC__</span>
+00255 <span class="preprocessor"></span><span class="keyword">extern</span> u_int bpf_filter(<span class="keyword">struct</span> bpf_insn *, u_char *, u_int, u_int);
+00256 <span class="preprocessor">#endif</span>
+00257 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
+00258 <span class="preprocessor"></span>
+00259 <span class="comment">/*</span>
+00260 <span class="comment"> * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).</span>
+00261 <span class="comment"> */</span>
+00262 <span class="preprocessor">#define BPF_MEMWORDS 16</span>
+00263 <span class="preprocessor"></span>
+00264 <span class="preprocessor">#endif</span>
+</pre></div><hr size="1"><address style="align: right;"><small>Generated on Wed Mar 10 13:23:37 2004 for libnet by
+<a href="http://www.doxygen.org/index.html">
+<img src="doxygen.png" alt="doxygen" align="middle" border=0 >
+</a>1.3.4 </small></address>
+</body>
+</html>