| | 1 | /* |
| | 2 | * Copyright (c) 1999-2005 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_OSREFERENCE_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 |
| | 10 | * License may not be used to create, or enable the creation or |
| | 11 | * redistribution of, unlawful or unlicensed copies of an Apple operating |
| | 12 | * system, or to circumvent, violate, or enable the circumvention or |
| | 13 | * violation of, any terms of an Apple operating system software license |
| | 14 | * agreement. |
| | 15 | * |
| | 16 | * Please obtain a copy of the License at |
| | 17 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 18 | * file. |
| | 19 | * |
| | 20 | * The Original Code and all software distributed under the License are |
| | 21 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 22 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 23 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 24 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 25 | * Please see the License for the specific language governing rights and |
| | 26 | * limitations under the License. |
| | 27 | * |
| | 28 | * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ |
| | 29 | */ |
| | 30 | |
| | 31 | /* |
| | 32 | * Support for socket filter kernel extensions |
| | 33 | */ |
| | 34 | |
| | 35 | #ifndef NET_KEXT_NET_H |
| | 36 | #define NET_KEXT_NET_H |
| | 37 | |
| | 38 | #include <sys/appleapiopts.h> |
| | 39 | |
| | 40 | #include <sys/queue.h> |
| | 41 | #include <sys/cdefs.h> |
| | 42 | |
| | 43 | #ifdef BSD_KERNEL_PRIVATE |
| | 44 | |
| | 45 | #include <sys/kpi_socketfilter.h> |
| | 46 | |
| | 47 | /* |
| | 48 | * Internal implementation bits |
| | 49 | */ |
| | 50 | |
| | 51 | struct socket_filter; |
| | 52 | |
| | 53 | #define SFEF_DETACHUSEZERO 0x1 // Detach when use reaches zero |
| | 54 | #define SFEF_UNREGISTERING 0x2 // Remove due to unregister |
| | 55 | |
| | 56 | struct socket_filter_entry { |
| | 57 | struct socket_filter_entry *sfe_next_onsocket; |
| | 58 | struct socket_filter_entry *sfe_next_onfilter; |
| | 59 | |
| | 60 | struct socket_filter *sfe_filter; |
| | 61 | struct socket *sfe_socket; |
| | 62 | void *sfe_cookie; |
| | 63 | |
| | 64 | u_int32_t sfe_flags; |
| | 65 | }; |
| | 66 | |
| | 67 | #define SFF_DETACHING 0x1 |
| | 68 | |
| | 69 | struct socket_filter { |
| | 70 | TAILQ_ENTRY(socket_filter) sf_protosw_next; |
| | 71 | TAILQ_ENTRY(socket_filter) sf_global_next; |
| | 72 | struct socket_filter_entry *sf_entry_head; |
| | 73 | |
| | 74 | struct protosw *sf_proto; |
| | 75 | struct sflt_filter sf_filter; |
| | 76 | u_int32_t sf_flags; |
| | 77 | u_int32_t sf_usecount; |
| | 78 | }; |
| | 79 | |
| | 80 | TAILQ_HEAD(socket_filter_list, socket_filter); |
| | 81 | |
| | 82 | /* Private, internal implementation functions */ |
| | 83 | void sflt_init(void); |
| | 84 | void sflt_initsock(struct socket *so); |
| | 85 | void sflt_termsock(struct socket *so); |
| | 86 | void sflt_use(struct socket *so); |
| | 87 | void sflt_unuse(struct socket *so); |
| | 88 | void sflt_notify(struct socket *so, sflt_event_t event, void *param); |
| | 89 | int sflt_data_in(struct socket *so, const struct sockaddr *from, mbuf_t *data, |
| | 90 | mbuf_t *control, sflt_data_flag_t flags, int *filtered); |
| | 91 | int sflt_attach_private(struct socket *so, struct socket_filter *filter, sflt_handle handle, int locked); |
| | 92 | |
| | 93 | #endif /* BSD_KERNEL_PRIVATE */ |
| | 94 | |
| | 95 | #define NFF_BEFORE 0x01 |
| | 96 | #define NFF_AFTER 0x02 |
| | 97 | |
| | 98 | #define NKE_OK 0 |
| | 99 | #define NKE_REMOVE -1 |
| | 100 | |
| | 101 | /* |
| | 102 | * Interface structure for inserting an installed socket NKE into an |
| | 103 | * existing socket. |
| | 104 | * 'handle' is the NKE to be inserted, 'where' is an insertion point, |
| | 105 | * and flags dictate the position of the to-be-inserted NKE relative to |
| | 106 | * the 'where' NKE. If the latter is NULL, the flags indicate "first" |
| | 107 | * or "last" |
| | 108 | */ |
| | 109 | #if __DARWIN_ALIGN_POWER |
| | 110 | #pragma options align=power |
| | 111 | #endif |
| | 112 | |
| | 113 | struct so_nke |
| | 114 | { unsigned int nke_handle; |
| | 115 | unsigned int nke_where; |
| | 116 | int nke_flags; /* NFF_BEFORE, NFF_AFTER: net/kext_net.h */ |
| | 117 | unsigned long reserved[4]; /* for future use */ |
| | 118 | }; |
| | 119 | |
| | 120 | #if __DARWIN_ALIGN_POWER |
| | 121 | #pragma options align=reset |
| | 122 | #endif |
| | 123 | |
| | 124 | #endif /* NET_KEXT_NET_H */ |
| | 125 | |
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