BSD 4.4 Lite Kernel Sources

1 files changed, 98 insertions, 0 deletions

diff --git a/sys/net/bpfdesc.h b/sys/net/bpfdesc.h
new file mode 100644
index 0000000..a13320e
--- /dev/null
+++ b/sys/net/bpfdesc.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 1990, 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from the Stanford/CMU enet packet filter,
+ * (net/enet.c) distributed as part of 4.3BSD, and code contributed
+ * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
+ * Berkeley Laboratory.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *      @(#)bpfdesc.h	8.1 (Berkeley) 6/10/93
+ *
+ * @(#) $Header: bpfdesc.h,v 1.9 91/10/27 21:22:38 mccanne Exp $ (LBL)
+ */
+
+/*
+ * Descriptor associated with each open bpf file.
+ */
+struct bpf_d {
+	struct bpf_d	*bd_next;	/* Linked list of descriptors */
+	/*
+	 * Buffer slots: two mbuf clusters buffer the incoming packets.
+	 *   The model has three slots.  Sbuf is always occupied.
+	 *   sbuf (store) - Receive interrupt puts packets here.
+	 *   hbuf (hold) - When sbuf is full, put cluster here and
+	 *                 wakeup read (replace sbuf with fbuf).
+	 *   fbuf (free) - When read is done, put cluster here.
+	 * On receiving, if sbuf is full and fbuf is 0, packet is dropped.
+	 */
+	caddr_t		bd_sbuf;	/* store slot */
+	caddr_t		bd_hbuf;	/* hold slot */
+	caddr_t		bd_fbuf;	/* free slot */
+	int 		bd_slen;	/* current length of store buffer */
+	int 		bd_hlen;	/* current length of hold buffer */
+
+	int		bd_bufsize;	/* absolute length of buffers */
+
+	struct bpf_if *	bd_bif;		/* interface descriptor */
+	u_long		bd_rtout;	/* Read timeout in 'ticks' */
+	struct bpf_insn *bd_filter; 	/* filter code */
+	u_long		bd_rcount;	/* number of packets received */
+	u_long		bd_dcount;	/* number of packets dropped */
+
+	u_char		bd_promisc;	/* true if listening promiscuously */
+	u_char		bd_state;	/* idle, waiting, or timed out */
+	u_char		bd_immediate;	/* true to return on packet arrival */
+#if BSD < 199103
+	u_char		bd_selcoll;	/* true if selects collide */
+	int		bd_timedout;
+	struct proc *	bd_selproc;	/* process that last selected us */
+#else
+	u_char		bd_pad;		/* explicit alignment */
+	struct selinfo	bd_sel;		/* bsd select info */
+#endif
+};
+
+/*
+ * Descriptor associated with each attached hardware interface.
+ */
+struct bpf_if {
+	struct bpf_if *bif_next;	/* list of all interfaces */
+	struct bpf_d *bif_dlist;	/* descriptor list */
+	struct bpf_if **bif_driverp;	/* pointer into softc */
+	u_int bif_dlt;			/* link layer type */
+	u_int bif_hdrlen;		/* length of header (with padding) */
+	struct ifnet *bif_ifp;		/* correspoding interface */
+};
+
+#ifdef KERNEL
+int	 bpf_setf __P((struct bpf_d *, struct bpf_program *));
+#endif