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Tue Feb 21 22:14:23 2012 UTC (12 years, 5 months ago) by misho
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> <title>libnet: bpf.h Source File</title> <link href="doxygen.css" rel="stylesheet" type="text/css"> </head><body>  <div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a></div> <h1>bpf.h</h1><div class="fragment"><pre>00001 /*- 00002  * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 00003  * The Regents of the University of California. All rights reserved. 00004  * 00005  * This code is derived from the Stanford/CMU enet packet filter, 00006  * (net/enet.c) distributed as part of 4.3BSD, and code contributed 00007  * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence  00008  * Berkeley Laboratory. 00009  * 00010  * Redistribution and use in source and binary forms, with or without 00011  * modification, are permitted provided that the following conditions 00012  * are met: 00013  * 1. Redistributions of source code must retain the above copyright 00014  * notice, this list of conditions and the following disclaimer. 00015  * 2. Redistributions in binary form must reproduce the above copyright 00016  * notice, this list of conditions and the following disclaimer in the 00017  * documentation and/or other materials provided with the distribution. 00018  * 3. All advertising materials mentioning features or use of this software 00019  * must display the following acknowledgement: 00020  * This product includes software developed by the University of 00021  * California, Berkeley and its contributors. 00022  * 4. Neither the name of the University nor the names of its contributors 00023  * may be used to endorse or promote products derived from this software 00024  * without specific prior written permission. 00025  * 00026  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00027  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00029  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00030  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00031  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00032  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00033  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00034  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00035  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00036  * SUCH DAMAGE. 00037  * 00038  * @(#)bpf.h 7.1 (Berkeley) 5/7/91 00039  * 00040  * @(#) $Header: /usr/local/www/users/anoncvs/cvs/embedaddon/libnet/doc/html/bpf_8h-source.html,v 1.1.1.1 2012/02/21 22:14:23 misho Exp $ (LBL) 00041  */ 00042 00043 #ifndef BPF_MAJOR_VERSION 00044  00045 /* BSD style release date */ 00046 #define BPF_RELEASE 199606 00047  00048 typedef int bpf_int32; 00049 typedef u_int bpf_u_int32; 00050 00051 /* 00052  * Alignment macros. BPF_WORDALIGN rounds up to the next  00053  * even multiple of BPF_ALIGNMENT.  00054  */ 00055 #define BPF_ALIGNMENT sizeof(bpf_int32) 00056 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1)) 00057  00058 #define BPF_MAXINSNS 512 00059 #define BPF_MAXBUFSIZE 0x8000 00060 #define BPF_MINBUFSIZE 32 00061  00062 /* 00063  * Structure for BIOCSETF. 00064  */ 00065 struct bpf_program { 00066 u_int bf_len; 00067 struct bpf_insn *bf_insns; 00068 }; 00069 00070 /* 00071  * Struct returned by BIOCGSTATS. 00072  */ 00073 struct bpf_stat { 00074 u_int bs_recv; /* number of packets received */ 00075 u_int bs_drop; /* number of packets dropped */ 00076 }; 00077 00078 /* 00079  * Struct return by BIOCVERSION. This represents the version number of  00080  * the filter language described by the instruction encodings below. 00081  * bpf understands a program iff kernel_major == filter_major && 00082  * kernel_minor >= filter_minor, that is, if the value returned by the 00083  * running kernel has the same major number and a minor number equal 00084  * equal to or less than the filter being downloaded. Otherwise, the 00085  * results are undefined, meaning an error may be returned or packets 00086  * may be accepted haphazardly. 00087  * It has nothing to do with the source code version. 00088  */ 00089 struct bpf_version { 00090 u_short bv_major; 00091 u_short bv_minor; 00092 }; 00093 /* Current version number of filter architecture. */ 00094 #define BPF_MAJOR_VERSION 1 00095 #define BPF_MINOR_VERSION 1 00096  00097 /* 00098  * BPF ioctls 00099  * 00100  * The first set is for compatibility with Sun's pcc style 00101  * header files. If your using gcc, we assume that you 00102  * have run fixincludes so the latter set should work. 00103  */ 00104 #if (defined(sun) || defined(ibm032)) && !defined(__GNUC__) 00105 #define BIOCGBLEN _IOR(B,102, u_int) 00106 #define BIOCSBLEN _IOWR(B,102, u_int) 00107 #define BIOCSETF _IOW(B,103, struct bpf_program) 00108 #define BIOCFLUSH _IO(B,104) 00109 #define BIOCPROMISC _IO(B,105) 00110 #define BIOCGDLT _IOR(B,106, u_int) 00111 #define BIOCGETIF _IOR(B,107, struct ifreq) 00112 #define BIOCSETIF _IOW(B,108, struct ifreq) 00113 #define BIOCSRTIMEOUT _IOW(B,109, struct timeval) 00114 #define BIOCGRTIMEOUT _IOR(B,110, struct timeval) 00115 #define BIOCGSTATS _IOR(B,111, struct bpf_stat) 00116 #define BIOCIMMEDIATE _IOW(B,112, u_int) 00117 #define BIOCVERSION _IOR(B,113, struct bpf_version) 00118 #define BIOCSTCPF _IOW(B,114, struct bpf_program) 00119 #define BIOCSUDPF _IOW(B,115, struct bpf_program) 00120 #else 00121 #define BIOCGBLEN _IOR('B',102, u_int) 00122 #define BIOCSBLEN _IOWR('B',102, u_int) 00123 #define BIOCSETF _IOW('B',103, struct bpf_program) 00124 #define BIOCFLUSH _IO('B',104) 00125 #define BIOCPROMISC _IO('B',105) 00126 #define BIOCGDLT _IOR('B',106, u_int) 00127 #define BIOCGETIF _IOR('B',107, struct ifreq) 00128 #define BIOCSETIF _IOW('B',108, struct ifreq) 00129 #define BIOCSRTIMEOUT _IOW('B',109, struct timeval) 00130 #define BIOCGRTIMEOUT _IOR('B',110, struct timeval) 00131 #define BIOCGSTATS _IOR('B',111, struct bpf_stat) 00132 #define BIOCIMMEDIATE _IOW('B',112, u_int) 00133 #define BIOCVERSION _IOR('B',113, struct bpf_version) 00134 #define BIOCSTCPF _IOW('B',114, struct bpf_program) 00135 #define BIOCSUDPF _IOW('B',115, struct bpf_program) 00136 #endif 00137  00138 /* 00139  * Structure prepended to each packet. 00140  */ 00141 struct bpf_hdr { 00142 struct timeval bh_tstamp; /* time stamp */ 00143 bpf_u_int32 bh_caplen; /* length of captured portion */ 00144 bpf_u_int32 bh_datalen; /* original length of packet */ 00145 u_short bh_hdrlen; /* length of bpf header (this struct 00146  plus alignment padding) */ 00147 }; 00148 /* 00149  * Because the structure above is not a multiple of 4 bytes, some compilers 00150  * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work. 00151  * Only the kernel needs to know about it; applications use bh_hdrlen. 00152  */ 00153 #ifdef KERNEL 00154 #define SIZEOF_BPF_HDR 18 00155 #endif 00156  00157 /* 00158  * Data-link level type codes. 00159  */ 00160 #define DLT_NULL 0 /* no link-layer encapsulation */ 00161 #define DLT_EN10MB 1 /* Ethernet (10Mb) */ 00162 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */ 00163 #define DLT_AX25 3 /* Amateur Radio AX.25 */ 00164 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */ 00165 #define DLT_CHAOS 5 /* Chaos */ 00166 #define DLT_IEEE802 6 /* IEEE 802 Networks */ 00167 #define DLT_ARCNET 7 /* ARCNET */ 00168 #define DLT_SLIP 8 /* Serial Line IP */ 00169 #define DLT_PPP 9 /* Point-to-point Protocol */ 00170 #define DLT_FDDI 10 /* FDDI */ 00171 #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */ 00172 #define DLT_RAW 12 /* raw IP */ 00173 #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */ 00174 #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */ 00175 00176 /* 00177  * The instruction encondings. 00178  */ 00179 /* instruction classes */ 00180 #define BPF_CLASS(code) ((code) & 0x07) 00181 #define BPF_LD 0x00 00182 #define BPF_LDX 0x01 00183 #define BPF_ST 0x02 00184 #define BPF_STX 0x03 00185 #define BPF_ALU 0x04 00186 #define BPF_JMP 0x05 00187 #define BPF_RET 0x06 00188 #define BPF_MISC 0x07 00189  00190 /* ld/ldx fields */ 00191 #define BPF_SIZE(code) ((code) & 0x18) 00192 #define BPF_W 0x00 00193 #define BPF_H 0x08 00194 #define BPF_B 0x10 00195 #define BPF_MODE(code) ((code) & 0xe0) 00196 #define BPF_IMM 0x00 00197 #define BPF_ABS 0x20 00198 #define BPF_IND 0x40 00199 #define BPF_MEM 0x60 00200 #define BPF_LEN 0x80 00201 #define BPF_MSH 0xa0 00202  00203 /* alu/jmp fields */ 00204 #define BPF_OP(code) ((code) & 0xf0) 00205 #define BPF_ADD 0x00 00206 #define BPF_SUB 0x10 00207 #define BPF_MUL 0x20 00208 #define BPF_DIV 0x30 00209 #define BPF_OR 0x40 00210 #define BPF_AND 0x50 00211 #define BPF_LSH 0x60 00212 #define BPF_RSH 0x70 00213 #define BPF_NEG 0x80 00214 #define BPF_JA 0x00 00215 #define BPF_JEQ 0x10 00216 #define BPF_JGT 0x20 00217 #define BPF_JGE 0x30 00218 #define BPF_JSET 0x40 00219 #define BPF_SRC(code) ((code) & 0x08) 00220 #define BPF_K 0x00 00221 #define BPF_X 0x08 00222  00223 /* ret - BPF_K and BPF_X also apply */ 00224 #define BPF_RVAL(code) ((code) & 0x18) 00225 #define BPF_A 0x10 00226  00227 /* misc */ 00228 #define BPF_MISCOP(code) ((code) & 0xf8) 00229 #define BPF_TAX 0x00 00230 #define BPF_TXA 0x80 00231  00232 /* 00233  * The instruction data structure. 00234  */ 00235 struct bpf_insn { 00236 u_short code; 00237 u_char jt; 00238 u_char jf; 00239 bpf_int32 k; 00240 }; 00241 00242 /* 00243  * Macros for insn array initializers. 00244  */ 00245 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k } 00246 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k } 00247  00248 #ifdef KERNEL 00249 extern u_int bpf_filter(); 00250 extern void bpfattach(); 00251 extern void bpf_tap(); 00252 extern void bpf_mtap(); 00253 #else 00254 #if __STDC__ 00255 extern u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int); 00256 #endif 00257 #endif 00258  00259 /* 00260  * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). 00261  */ 00262 #define BPF_MEMWORDS 16 00263  00264 #endif </pre></div><hr size="1"><address style="align: right;">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 </address> </body> </html>