bsd/net/kext_net.h

   1 /*
   2  * Copyright (c) 1999-2013 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
  29 /*
  30  * Support for socket filter kernel extensions
  31  */
  32
  33 #ifndef NET_KEXT_NET_H
  34 #define NET_KEXT_NET_H
  35
  36 #include <sys/appleapiopts.h>
  37
  38 #include <sys/queue.h>
  39 #include <sys/cdefs.h>
  40
  41 #ifdef BSD_KERNEL_PRIVATE
  42 /*
  43  * Internal implementation bits
  44  */
  45 #include <sys/kpi_socketfilter.h>
  46
  47 struct socket;
  48 struct sockopt;
  49 struct inpcb;
  50
  51 /* Private, internal implementation functions */
  52 extern void     sflt_init(void);
  53 extern int      sflt_permission_check(struct inpcb *inp);
  54 extern void     sflt_initsock(struct socket *so);
  55 extern void     sflt_termsock(struct socket *so);
  56 extern errno_t  sflt_attach_internal(struct socket *so, sflt_handle     handle);
  57 extern void     sflt_notify(struct socket *so, sflt_event_t event, void *param);
  58 extern int      sflt_ioctl(struct socket *so, u_long cmd, caddr_t data);
  59 extern int      sflt_bind(struct socket *so, const struct sockaddr *nam);
  60 extern int      sflt_listen(struct socket *so);
  61 extern int      sflt_accept(struct socket *head, struct socket *so,
  62                     const struct sockaddr *local,
  63                     const struct sockaddr *remote);
  64 extern int      sflt_getsockname(struct socket *so, struct sockaddr **local);
  65 extern int      sflt_getpeername(struct socket *so, struct sockaddr **remote);
  66 extern int      sflt_connectin(struct socket *head,
  67                     const struct sockaddr *remote);
  68 extern int      sflt_connectout(struct socket *so, const struct sockaddr *nam);
  69 extern int      sflt_setsockopt(struct socket *so, struct sockopt *sopt);
  70 extern int      sflt_getsockopt(struct socket *so, struct sockopt *sopt);
  71 extern int      sflt_data_out(struct socket *so, const struct sockaddr  *to,
  72                     mbuf_t *data, mbuf_t *control, sflt_data_flag_t flags);
  73 extern int      sflt_data_in(struct socket *so, const struct sockaddr *from,
  74                     mbuf_t *data, mbuf_t *control, sflt_data_flag_t flags);
  75
  76 #endif /* BSD_KERNEL_PRIVATE */
  77
  78 #define NFF_BEFORE              0x01
  79 #define NFF_AFTER               0x02
  80
  81 #define NKE_OK                  0
  82 #define NKE_REMOVE              (-1)
  83
  84 /*
  85  * Interface structure for inserting an installed socket NKE into an
  86  *  existing socket.
  87  * 'handle' is the NKE to be inserted, 'where' is an insertion point,
  88  *  and flags dictate the position of the to-be-inserted NKE relative to
  89  *  the 'where' NKE.  If the latter is NULL, the flags indicate "first"
  90  *  or "last"
  91  */
  92 #pragma pack(4)
  93
  94 struct so_nke {
  95         unsigned int nke_handle;
  96         unsigned int nke_where;
  97         int nke_flags; /* NFF_BEFORE, NFF_AFTER: net/kext_net.h */
  98         u_int32_t reserved[4];  /* for future use */
  99 };
 100
 101 #pragma pack()
 102 #endif /* NET_KEXT_NET_H */