X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/de355530ae67247cbd0da700edb3a2a1dae884c2..a991bd8d3e7fe02dbca0644054bab73c5b75324a:/bsd/net/bpfdesc.h diff --git a/bsd/net/bpfdesc.h b/bsd/net/bpfdesc.h index b8f80bb63..531d9217b 100644 --- a/bsd/net/bpfdesc.h +++ b/bsd/net/bpfdesc.h @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2017 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1990, 1991, 1993 @@ -64,18 +70,21 @@ #ifndef _NET_BPFDESC_H_ #define _NET_BPFDESC_H_ #include -#ifdef __APPLE_API_PRIVATE +#ifdef KERNEL_PRIVATE /* * The items in this header file should be wrapped in #ifdef KERNEL. */ +#include #include +#include +#include /* * Descriptor associated with each open bpf file. */ struct bpf_d { - struct bpf_d *bd_next; /* Linked list of descriptors */ + 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. @@ -85,54 +94,96 @@ struct bpf_d { * 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 */ + 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 */ + u_int32_t bd_scnt; /* number of packets in store buffer */ + u_int32_t bd_hcnt; /* number of packets in hold buffer */ - int bd_bufsize; /* absolute length of buffers */ + int bd_bufsize; /* absolute length of buffers */ + int bd_hbuf_read; /* reading from hbuf */ + int bd_headdrop; /* Keep newer packets */ - 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 */ + struct bpf_if *bd_bif; /* interface descriptor */ + u_int32_t bd_rtout; /* Read timeout in 'ticks' */ + struct bpf_insn *bd_filter; /* filter code */ + u_int32_t bd_rcount; /* number of packets received */ + u_int32_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_async; /* non-zero if packet reception should generate signal */ - int bd_sig; /* signal to send upon packet reception */ + 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_async; /* non-zero if packet reception should generate signal */ + int bd_sig; /* signal to send upon packet reception */ #ifdef __APPLE__ - pid_t bd_sigio; + pid_t bd_sigio; #else - struct sigio * bd_sigio; /* information for async I/O */ + struct sigio * bd_sigio; /* information for async I/O */ #endif #if BSD < 199103 - u_char bd_selcoll; /* true if selects collide */ - int bd_timedout; - struct proc * bd_selproc; /* process that last selected us */ + 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 */ + u_char bd_pad; /* explicit alignment */ + struct selinfo bd_sel; /* bsd select info */ #endif - int bd_hdrcmplt; /* false to fill in src lladdr automatically */ - int bd_seesent; /* true if bpf should see sent packets */ + int bd_hdrcmplt; /* false to fill in src lladdr automatically */ + int bd_seesent; /* true if bpf should see sent packets */ + int bd_oflags; /* device open flags */ + thread_call_t bd_thread_call; /* for BPF timeouts with select */ + int bd_traffic_class; /* traffic service class */ + int bd_flags; /* flags */ + int bd_refcnt; +#define BPF_REF_HIST 4 /* how many callers to keep around */ + void *bd_ref_lr[BPF_REF_HIST]; + void *bd_unref_lr[BPF_REF_HIST]; + int bd_next_ref_lr; + int bd_next_unref_lr; + + struct proc *bd_opened_by; + uuid_t bd_uuid; }; +/* Values for bd_state */ +#define BPF_IDLE 0 /* no select in progress or kqueue pending */ +#define BPF_WAITING 1 /* waiting for read timeout in select/kqueue */ +#define BPF_TIMED_OUT 2 /* read timeout has expired in select/kqueue */ +#define BPF_DRAINING 3 /* waiting for timeout routine to finish during close */ + +/* Test whether a BPF is ready for read(). */ +#define bpf_ready(bd) ((bd)->bd_hlen != 0 || \ + (((bd)->bd_immediate || (bd)->bd_state == BPF_TIMED_OUT) && \ + (bd)->bd_slen != 0)) + +/* Values for bd_flags */ +#define BPF_EXTENDED_HDR 0x0001 /* process req. the extended header */ +#define BPF_WANT_PKTAP 0x0002 /* knows how to handle DLT_PKTAP */ +#define BPF_FINALIZE_PKTAP 0x0004 /* finalize pktap header on read */ +#define BPF_KNOTE 0x0008 /* kernel note attached */ +#define BPF_DETACHING 0x0010 /* bpf_d is being detached */ +#define BPF_DETACHED 0x0020 /* bpf_d is detached */ +#define BPF_CLOSING 0x0040 /* bpf_d is being closed */ +#define BPF_TRUNCATE 0x0080 /* truncate the packet payload */ +#define BPF_PKTHDRV2 0x0100 /* pktap header version 2 */ + /* * 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 */ - u_int bif_dlt; /* link layer type */ - u_int bif_hdrlen; /* length of header (with padding) */ - struct ifnet *bif_ifp; /* corresponding interface */ + struct bpf_if *bif_next; /* list of all interfaces */ + struct bpf_d *bif_dlist; /* descriptor list */ + u_int bif_dlt; /* link layer type */ + u_int bif_hdrlen; /* length of header (with padding) */ + u_int bif_exthdrlen; /* length of ext header */ + struct ifnet *bif_ifp; /* corresponding interface */ + bpf_send_func bif_send; + bpf_tap_func bif_tap; }; -#endif /* __APPLE_API_PRIVATE */ +#endif /* KERNEL_PRIVATE */ #endif