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Diffstat (limited to 'rtems/freebsd/net/bpfdesc.h')
| -rw-r--r-- | rtems/freebsd/net/bpfdesc.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/rtems/freebsd/net/bpfdesc.h b/rtems/freebsd/net/bpfdesc.h new file mode 100644 index 00000000..ae4e0124 --- /dev/null +++ b/rtems/freebsd/net/bpfdesc.h @@ -0,0 +1,149 @@ +/*- + * 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. + * 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 + * + * $FreeBSD$ + */ + +#ifndef _NET_BPFDESC_HH_ +#define _NET_BPFDESC_HH_ + +#include <rtems/freebsd/sys/callout.h> +#include <rtems/freebsd/sys/selinfo.h> +#include <rtems/freebsd/sys/queue.h> +#include <rtems/freebsd/sys/conf.h> +#include <rtems/freebsd/net/if.h> + +/* + * Descriptor associated with each open bpf file. + */ +struct zbuf; +struct bpf_d { + LIST_ENTRY(bpf_d) bd_next; /* Linked list of descriptors */ + /* + * Buffer slots: two memory buffers store 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 buffer here and + * wakeup read (replace sbuf with fbuf). + * fbuf (free) - When read is done, put buffer 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_rfilter; /* read filter code */ + struct bpf_insn *bd_wfilter; /* write filter code */ + void *bd_bfilter; /* binary filter code */ + u_int64_t bd_rcount; /* number of packets received */ + u_int64_t 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 */ + int bd_hdrcmplt; /* false to fill in src lladdr automatically */ + int bd_direction; /* select packet direction */ + int bd_feedback; /* true to feed back sent packets */ + int bd_async; /* non-zero if packet reception should generate signal */ + int bd_sig; /* signal to send upon packet reception */ + struct sigio * bd_sigio; /* information for async I/O */ + struct selinfo bd_sel; /* bsd select info */ + struct mtx bd_mtx; /* mutex for this descriptor */ + struct callout bd_callout; /* for BPF timeouts with select */ + struct label *bd_label; /* MAC label for descriptor */ + u_int64_t bd_fcount; /* number of packets which matched filter */ + pid_t bd_pid; /* PID which created descriptor */ + int bd_locked; /* true if descriptor is locked */ + u_int bd_bufmode; /* Current buffer mode. */ + u_int64_t bd_wcount; /* number of packets written */ + u_int64_t bd_wfcount; /* number of packets that matched write filter */ + u_int64_t bd_wdcount; /* number of packets dropped during a write */ + u_int64_t bd_zcopy; /* number of zero copy operations */ + u_char bd_compat32; /* 32-bit stream on LP64 system */ +}; + +/* Values for bd_state */ +#define BPF_IDLE 0 /* no select in progress */ +#define BPF_WAITING 1 /* waiting for read timeout in select */ +#define BPF_TIMED_OUT 2 /* read timeout has expired in select */ + +#define BPFD_LOCK(bd) mtx_lock(&(bd)->bd_mtx) +#define BPFD_UNLOCK(bd) mtx_unlock(&(bd)->bd_mtx) +#define BPFD_LOCK_ASSERT(bd) mtx_assert(&(bd)->bd_mtx, MA_OWNED) + +/* + * External representation of the bpf descriptor + */ +struct xbpf_d { + u_int bd_structsize; /* Size of this structure. */ + u_char bd_promisc; + u_char bd_immediate; + u_char __bd_pad[6]; + int bd_hdrcmplt; + int bd_direction; + int bd_feedback; + int bd_async; + u_int64_t bd_rcount; + u_int64_t bd_dcount; + u_int64_t bd_fcount; + int bd_sig; + int bd_slen; + int bd_hlen; + int bd_bufsize; + pid_t bd_pid; + char bd_ifname[IFNAMSIZ]; + int bd_locked; + u_int64_t bd_wcount; + u_int64_t bd_wfcount; + u_int64_t bd_wdcount; + u_int64_t bd_zcopy; + int bd_bufmode; + /* + * Allocate 4 64 bit unsigned integers for future expansion so we do + * not have to worry about breaking the ABI. + */ + u_int64_t bd_spare[4]; +}; + +#define BPFIF_LOCK(bif) mtx_lock(&(bif)->bif_mtx) +#define BPFIF_UNLOCK(bif) mtx_unlock(&(bif)->bif_mtx) + +#endif |