bsd/net/dlil.h

   1 /*
   2  * Copyright (c) 1999-2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #ifndef DLIL_H
  29 #define DLIL_H
  30 #ifdef KERNEL
  31
  32 #include <sys/kernel_types.h>
  33 #include <net/kpi_interface.h>
  34
  35 enum {
  36         BPF_TAP_DISABLE,
  37         BPF_TAP_INPUT,
  38         BPF_TAP_OUTPUT,
  39         BPF_TAP_INPUT_OUTPUT
  40 };
  41
  42 /* Ethernet specific types */
  43 #define DLIL_DESC_ETYPE2        4
  44 #define DLIL_DESC_SAP           5
  45 #define DLIL_DESC_SNAP          6
  46 /*
  47  * DLIL_DESC_ETYPE2 - native_type must point to 2 byte ethernet raw protocol,
  48  *                    variants.native_type_length must be set to 2
  49  * DLIL_DESC_SAP - native_type must point to 3 byte SAP protocol
  50  *                 variants.native_type_length must be set to 3
  51  * DLIL_DESC_SNAP - native_type must point to 5 byte SNAP protocol
  52  *                  variants.native_type_length must be set to 5
  53  *
  54  * All protocols must be in Network byte order.
  55  *
  56  * Future interface families may define more protocol types they know about.
  57  * The type implies the offset and context of the protocol data at native_type.
  58  * The length of the protocol data specified at native_type must be set in
  59  * variants.native_type_length.
  60  */
  61
  62 #ifdef KERNEL_PRIVATE
  63
  64 #include <net/if.h>
  65 #include <net/if_var.h>
  66 #include <sys/kern_event.h>
  67 #include <kern/thread.h>
  68 #include <kern/locks.h>
  69
  70 #if __STDC__
  71
  72 struct ifnet;
  73 struct mbuf;
  74 struct ether_header;
  75 struct sockaddr_dl;
  76
  77 #endif
  78
  79 struct iff_filter;
  80
  81 #define DLIL_THREADNAME_LEN     32
  82
  83 struct dlil_threading_info {
  84         decl_lck_mtx_data(, input_lck);
  85         lck_grp_t       *lck_grp;       /* lock group (for lock stats) */
  86         mbuf_t          mbuf_head;      /* start of mbuf list from if */
  87         mbuf_t          mbuf_tail;
  88         u_int32_t       mbuf_count;
  89         boolean_t       net_affinity;   /* affinity set is available */
  90         u_int32_t       input_waiting;  /* DLIL condition of thread */
  91         struct thread   *input_thread;  /* thread data for this input */
  92         struct thread   *workloop_thread; /* current workloop thread */
  93         u_int32_t       tag;            /* current affinity tag */
  94         char            input_name[DLIL_THREADNAME_LEN];
  95 #if IFNET_INPUT_SANITY_CHK
  96         u_int32_t       input_wake_cnt; /* number of times the thread was awaken with packets to process */
  97         u_long          input_mbuf_cnt; /* total number of mbuf packets processed by this thread */
  98 #endif
  99 };
 100
 101 /*
 102  * The following are shared with kpi_protocol.c so that it may wakeup
 103  * the input thread to run through packets queued for protocol input.
 104 */
 105 #define DLIL_INPUT_RUNNING      0x80000000
 106 #define DLIL_INPUT_WAITING      0x40000000
 107 #define DLIL_PROTO_REGISTER     0x20000000
 108 #define DLIL_PROTO_WAITING      0x10000000
 109 #define DLIL_INPUT_TERMINATE    0x08000000
 110
 111 extern void dlil_init(void);
 112
 113 extern errno_t dlil_set_bpf_tap(ifnet_t, bpf_tap_mode, bpf_packet_func);
 114
 115 /*
 116  * Send arp internal bypasses the check for IPv4LL.
 117  */
 118 extern errno_t dlil_send_arp_internal(ifnet_t, u_int16_t,
 119     const struct sockaddr_dl *, const struct sockaddr *,
 120     const struct sockaddr_dl *, const struct sockaddr *);
 121
 122 extern int dlil_output(ifnet_t, protocol_family_t, mbuf_t, void *,
 123     const struct sockaddr *, int);
 124
 125 extern void dlil_input_packet_list(struct ifnet *, struct mbuf *);
 126
 127 extern errno_t dlil_resolve_multi(struct ifnet *,
 128     const struct sockaddr *, struct sockaddr *, size_t);
 129
 130 extern errno_t dlil_send_arp(ifnet_t, u_int16_t, const struct sockaddr_dl *,
 131     const struct sockaddr *, const struct sockaddr_dl *,
 132     const struct sockaddr *);
 133
 134 extern int dlil_attach_filter(ifnet_t, const struct iff_filter *,
 135     interface_filter_t *);
 136 extern void dlil_detach_filter(interface_filter_t);
 137
 138 extern void dlil_proto_unplumb_all(ifnet_t);
 139
 140 extern void dlil_post_msg(struct ifnet *, u_int32_t, u_int32_t,
 141     struct net_event_data *, u_int32_t);
 142
 143 /*
 144  * dlil_if_acquire is obsolete. Use ifnet_allocate.
 145  */
 146 extern int dlil_if_acquire(u_int32_t, const void *, size_t, struct ifnet **);
 147 /*
 148  * dlil_if_release is obsolete. The equivalent is called automatically when
 149  * an interface is detached.
 150  */
 151 extern void dlil_if_release(struct ifnet *ifp);
 152
 153 extern u_int32_t ifnet_aggressive_drainers;
 154
 155 extern errno_t dlil_if_ref(struct ifnet *);
 156 extern errno_t dlil_if_free(struct ifnet *);
 157
 158 #endif /* KERNEL_PRIVATE */
 159 #endif /* KERNEL */
 160 #endif /* DLIL_H */