Annotation of embedaddon/libnet/include/bpf.h, revision 1.1.1.2
1.1.1.2 ! misho 1: /*
! 2: It's not clear what purpose including this file with libnet serves. Is it just
! 3: for the DLT_ values? On systems with bpf, it should be present in the system
! 4: headers! Also, it's definitions have conflicted with the system's on AIX.
! 5: */
1.1 misho 6: /*-
7: * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
8: * The Regents of the University of California. All rights reserved.
9: *
10: * This code is derived from the Stanford/CMU enet packet filter,
11: * (net/enet.c) distributed as part of 4.3BSD, and code contributed
12: * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
13: * Berkeley Laboratory.
14: *
15: * Redistribution and use in source and binary forms, with or without
16: * modification, are permitted provided that the following conditions
17: * are met:
18: * 1. Redistributions of source code must retain the above copyright
19: * notice, this list of conditions and the following disclaimer.
20: * 2. Redistributions in binary form must reproduce the above copyright
21: * notice, this list of conditions and the following disclaimer in the
22: * documentation and/or other materials provided with the distribution.
23: * 3. All advertising materials mentioning features or use of this software
24: * must display the following acknowledgement:
25: * This product includes software developed by the University of
26: * California, Berkeley and its contributors.
27: * 4. Neither the name of the University nor the names of its contributors
28: * may be used to endorse or promote products derived from this software
29: * without specific prior written permission.
30: *
31: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41: * SUCH DAMAGE.
42: *
43: * @(#)bpf.h 7.1 (Berkeley) 5/7/91
44: *
45: * @(#) $Header: /usr/local/CVS/libnet/include/bpf.h,v 1.1.1.1 2003/06/26 21:55:10 route Exp $ (LBL)
46: */
47:
48: #ifndef BPF_MAJOR_VERSION
49:
50: /* BSD style release date */
51: #define BPF_RELEASE 199606
52:
53: typedef int bpf_int32;
54: typedef u_int bpf_u_int32;
55:
56: /*
57: * Alignment macros. BPF_WORDALIGN rounds up to the next
58: * even multiple of BPF_ALIGNMENT.
59: */
60: #define BPF_ALIGNMENT sizeof(bpf_int32)
61: #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
62:
63: #define BPF_MAXINSNS 512
64: #define BPF_MAXBUFSIZE 0x8000
65: #define BPF_MINBUFSIZE 32
66:
67: /*
68: * Structure for BIOCSETF.
69: */
70: struct bpf_program {
71: u_int bf_len;
72: struct bpf_insn *bf_insns;
73: };
74:
75: /*
76: * Struct returned by BIOCGSTATS.
77: */
78: struct bpf_stat {
79: u_int bs_recv; /* number of packets received */
80: u_int bs_drop; /* number of packets dropped */
81: };
82:
83: /*
84: * Struct return by BIOCVERSION. This represents the version number of
85: * the filter language described by the instruction encodings below.
86: * bpf understands a program iff kernel_major == filter_major &&
87: * kernel_minor >= filter_minor, that is, if the value returned by the
88: * running kernel has the same major number and a minor number equal
89: * equal to or less than the filter being downloaded. Otherwise, the
90: * results are undefined, meaning an error may be returned or packets
91: * may be accepted haphazardly.
92: * It has nothing to do with the source code version.
93: */
94: struct bpf_version {
95: u_short bv_major;
96: u_short bv_minor;
97: };
98: /* Current version number of filter architecture. */
99: #define BPF_MAJOR_VERSION 1
100: #define BPF_MINOR_VERSION 1
101:
102: /*
103: * BPF ioctls
104: *
105: * The first set is for compatibility with Sun's pcc style
106: * header files. If your using gcc, we assume that you
107: * have run fixincludes so the latter set should work.
108: */
109: #if (defined(sun) || defined(ibm032)) && !defined(__GNUC__)
110: #define BIOCGBLEN _IOR(B,102, u_int)
111: #define BIOCSBLEN _IOWR(B,102, u_int)
112: #define BIOCSETF _IOW(B,103, struct bpf_program)
113: #define BIOCFLUSH _IO(B,104)
114: #define BIOCPROMISC _IO(B,105)
115: #define BIOCGDLT _IOR(B,106, u_int)
116: #define BIOCGETIF _IOR(B,107, struct ifreq)
117: #define BIOCSETIF _IOW(B,108, struct ifreq)
118: #define BIOCSRTIMEOUT _IOW(B,109, struct timeval)
119: #define BIOCGRTIMEOUT _IOR(B,110, struct timeval)
120: #define BIOCGSTATS _IOR(B,111, struct bpf_stat)
121: #define BIOCIMMEDIATE _IOW(B,112, u_int)
122: #define BIOCVERSION _IOR(B,113, struct bpf_version)
123: #define BIOCSTCPF _IOW(B,114, struct bpf_program)
124: #define BIOCSUDPF _IOW(B,115, struct bpf_program)
125: #else
126: #define BIOCGBLEN _IOR('B',102, u_int)
127: #define BIOCSBLEN _IOWR('B',102, u_int)
128: #define BIOCSETF _IOW('B',103, struct bpf_program)
129: #define BIOCFLUSH _IO('B',104)
130: #define BIOCPROMISC _IO('B',105)
131: #define BIOCGDLT _IOR('B',106, u_int)
132: #define BIOCGETIF _IOR('B',107, struct ifreq)
133: #define BIOCSETIF _IOW('B',108, struct ifreq)
134: #define BIOCSRTIMEOUT _IOW('B',109, struct timeval)
135: #define BIOCGRTIMEOUT _IOR('B',110, struct timeval)
136: #define BIOCGSTATS _IOR('B',111, struct bpf_stat)
137: #define BIOCIMMEDIATE _IOW('B',112, u_int)
138: #define BIOCVERSION _IOR('B',113, struct bpf_version)
139: #define BIOCSTCPF _IOW('B',114, struct bpf_program)
140: #define BIOCSUDPF _IOW('B',115, struct bpf_program)
141: #endif
142:
143: /*
144: * Structure prepended to each packet.
145: */
146: struct bpf_hdr {
147: struct timeval bh_tstamp; /* time stamp */
148: bpf_u_int32 bh_caplen; /* length of captured portion */
149: bpf_u_int32 bh_datalen; /* original length of packet */
150: u_short bh_hdrlen; /* length of bpf header (this struct
151: plus alignment padding) */
152: };
153: /*
154: * Because the structure above is not a multiple of 4 bytes, some compilers
155: * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work.
156: * Only the kernel needs to know about it; applications use bh_hdrlen.
157: */
158: #ifdef KERNEL
159: #define SIZEOF_BPF_HDR 18
160: #endif
161:
162: /*
163: * Data-link level type codes.
164: */
165: #define DLT_NULL 0 /* no link-layer encapsulation */
166: #define DLT_EN10MB 1 /* Ethernet (10Mb) */
167: #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
168: #define DLT_AX25 3 /* Amateur Radio AX.25 */
169: #define DLT_PRONET 4 /* Proteon ProNET Token Ring */
170: #define DLT_CHAOS 5 /* Chaos */
171: #define DLT_IEEE802 6 /* IEEE 802 Networks */
172: #define DLT_ARCNET 7 /* ARCNET */
173: #define DLT_SLIP 8 /* Serial Line IP */
174: #define DLT_PPP 9 /* Point-to-point Protocol */
175: #define DLT_FDDI 10 /* FDDI */
176: #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */
177: #define DLT_RAW 12 /* raw IP */
178: #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */
179: #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */
180:
181: /*
182: * The instruction encondings.
183: */
184: /* instruction classes */
185: #define BPF_CLASS(code) ((code) & 0x07)
186: #define BPF_LD 0x00
187: #define BPF_LDX 0x01
188: #define BPF_ST 0x02
189: #define BPF_STX 0x03
190: #define BPF_ALU 0x04
191: #define BPF_JMP 0x05
192: #define BPF_RET 0x06
193: #define BPF_MISC 0x07
194:
195: /* ld/ldx fields */
196: #define BPF_SIZE(code) ((code) & 0x18)
197: #define BPF_W 0x00
198: #define BPF_H 0x08
199: #define BPF_B 0x10
200: #define BPF_MODE(code) ((code) & 0xe0)
201: #define BPF_IMM 0x00
202: #define BPF_ABS 0x20
203: #define BPF_IND 0x40
204: #define BPF_MEM 0x60
205: #define BPF_LEN 0x80
206: #define BPF_MSH 0xa0
207:
208: /* alu/jmp fields */
209: #define BPF_OP(code) ((code) & 0xf0)
210: #define BPF_ADD 0x00
211: #define BPF_SUB 0x10
212: #define BPF_MUL 0x20
213: #define BPF_DIV 0x30
214: #define BPF_OR 0x40
215: #define BPF_AND 0x50
216: #define BPF_LSH 0x60
217: #define BPF_RSH 0x70
218: #define BPF_NEG 0x80
219: #define BPF_JA 0x00
220: #define BPF_JEQ 0x10
221: #define BPF_JGT 0x20
222: #define BPF_JGE 0x30
223: #define BPF_JSET 0x40
224: #define BPF_SRC(code) ((code) & 0x08)
225: #define BPF_K 0x00
226: #define BPF_X 0x08
227:
228: /* ret - BPF_K and BPF_X also apply */
229: #define BPF_RVAL(code) ((code) & 0x18)
230: #define BPF_A 0x10
231:
232: /* misc */
233: #define BPF_MISCOP(code) ((code) & 0xf8)
234: #define BPF_TAX 0x00
235: #define BPF_TXA 0x80
236:
237: /*
238: * The instruction data structure.
239: */
240: struct bpf_insn {
241: u_short code;
242: u_char jt;
243: u_char jf;
244: bpf_int32 k;
245: };
246:
247: /*
248: * Macros for insn array initializers.
249: */
250: #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
251: #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
252:
253: #ifdef KERNEL
254: extern u_int bpf_filter();
255: extern void bpfattach();
256: extern void bpf_tap();
257: extern void bpf_mtap();
258: #else
259: #if __STDC__
260: extern u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int);
261: #endif
262: #endif
263:
264: /*
265: * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
266: */
267: #define BPF_MEMWORDS 16
268:
269: #endif
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