bpfdesc.h revision 1.43
1 /* $NetBSD: bpfdesc.h,v 1.43 2017/02/01 08:16:42 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from the Stanford/CMU enet packet filter, 8 * (net/enet.c) distributed as part of 4.3BSD, and code contributed 9 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 10 * Berkeley Laboratory. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93 37 * 38 * @(#) Header: bpfdesc.h,v 1.14 96/06/16 22:28:07 leres Exp (LBL) 39 */ 40 41 #ifndef _NET_BPFDESC_H_ 42 #define _NET_BPFDESC_H_ 43 44 #include <sys/callout.h> 45 #include <sys/selinfo.h> /* for struct selinfo */ 46 #include <net/if.h> /* for IFNAMSIZ */ 47 #include <net/bpfjit.h> /* for bpfjit_function_t */ 48 #ifdef _KERNEL 49 #include <sys/pslist.h> 50 #include <sys/mutex.h> 51 #include <sys/condvar.h> 52 #endif 53 54 /* 55 * Descriptor associated with each open bpf file. 56 */ 57 struct bpf_d { 58 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 59 struct bpf_d *_bd_next; /* Linked list of descriptors */ 60 /* 61 * Buffer slots: two mbuf clusters buffer the incoming packets. 62 * The model has three slots. Sbuf is always occupied. 63 * sbuf (store) - Receive interrupt puts packets here. 64 * hbuf (hold) - When sbuf is full, put cluster here and 65 * wakeup read (replace sbuf with fbuf). 66 * fbuf (free) - When read is done, put cluster here. 67 * On receiving, if sbuf is full and fbuf is 0, packet is dropped. 68 */ 69 void * bd_sbuf; /* store slot */ 70 void * bd_hbuf; /* hold slot */ 71 void * bd_fbuf; /* free slot */ 72 int bd_slen; /* current length of store buffer */ 73 int bd_hlen; /* current length of hold buffer */ 74 75 int bd_bufsize; /* absolute length of buffers */ 76 77 struct bpf_if * bd_bif; /* interface descriptor */ 78 u_long bd_rtout; /* Read timeout in 'ticks' */ 79 struct bpf_insn *bd_filter; /* filter code */ 80 u_long bd_rcount; /* number of packets received */ 81 u_long bd_dcount; /* number of packets dropped */ 82 u_long bd_ccount; /* number of packets captured */ 83 84 u_char bd_promisc; /* true if listening promiscuously */ 85 u_char bd_state; /* idle, waiting, or timed out */ 86 u_char bd_immediate; /* true to return on packet arrival */ 87 int bd_hdrcmplt; /* false to fill in src lladdr */ 88 int bd_seesent; /* true if bpf should see sent packets */ 89 int bd_feedback; /* true to feed back sent packets */ 90 int bd_async; /* non-zero if packet reception should generate signal */ 91 pid_t bd_pgid; /* process or group id for signal */ 92 #if BSD < 199103 93 u_char bd_selcoll; /* true if selects collide */ 94 int bd_timedout; 95 struct proc * bd_selproc; /* process that last selected us */ 96 #else 97 u_char bd_pad; /* explicit alignment */ 98 struct selinfo bd_sel; /* bsd select info */ 99 #endif 100 callout_t bd_callout; /* for BPF timeouts with select */ 101 pid_t bd_pid; /* corresponding PID */ 102 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 103 LIST_ENTRY(bpf_d) _bd_list; /* list of all BPF's */ 104 void *bd_sih; /* soft interrupt handle */ 105 struct timespec bd_atime; /* access time */ 106 struct timespec bd_mtime; /* modification time */ 107 struct timespec bd_btime; /* birth time */ 108 #ifdef _LP64 109 int bd_compat32; /* 32-bit stream on LP64 system */ 110 #endif 111 bpfjit_func_t bd_jitcode; /* compiled filter program */ 112 size_t bd_filter_size; 113 #ifdef _KERNEL 114 struct pslist_entry bd_bif_dlist_entry; /* For bpf_if */ 115 struct pslist_entry bd_bpf_dlist_entry; /* For the global list */ 116 kmutex_t *bd_mtx; 117 kcondvar_t bd_cv; 118 #endif 119 }; 120 121 122 /* Values for bd_state */ 123 #define BPF_IDLE 0 /* no select in progress */ 124 #define BPF_WAITING 1 /* waiting for read timeout in select */ 125 #define BPF_TIMED_OUT 2 /* read timeout has expired in select */ 126 127 /* 128 * Description associated with the external representation of each 129 * open bpf file. 130 */ 131 struct bpf_d_ext { 132 int32_t bde_bufsize; 133 uint8_t bde_promisc; 134 uint8_t bde_state; 135 uint8_t bde_immediate; 136 int32_t bde_hdrcmplt; 137 int32_t bde_seesent; 138 pid_t bde_pid; 139 uint64_t bde_rcount; /* number of packets received */ 140 uint64_t bde_dcount; /* number of packets dropped */ 141 uint64_t bde_ccount; /* number of packets captured */ 142 char bde_ifname[IFNAMSIZ]; 143 }; 144 145 146 /* 147 * Descriptor associated with each attached hardware interface. 148 */ 149 struct bpf_if { 150 /* DEPRECATED. Keep it to avoid breaking kvm(3) users */ 151 struct bpf_if *_bif_next; /* list of all interfaces */ 152 struct bpf_d *_bif_dlist; /* descriptor list */ 153 struct bpf_if **bif_driverp; /* pointer into softc */ 154 u_int bif_dlt; /* link layer type */ 155 u_int bif_hdrlen; /* length of header (with padding) */ 156 struct ifnet *bif_ifp; /* corresponding interface */ 157 void *bif_si; 158 struct mbuf *bif_mbuf_head; 159 struct mbuf *bif_mbuf_tail; 160 #ifdef _KERNEL 161 struct pslist_entry bif_iflist_entry; 162 struct pslist_head bif_dlist_head; 163 #endif 164 }; 165 166 #endif /* !_NET_BPFDESC_H_ */ 167
Indexes created Tue Sep 23 22:09:46 GMT 2025