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- /*
- * Copyright (c) 2000 Apple Computer, 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
- * 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@
- */
- /* Copyright (C) 1999 Apple Computer, Inc. */
- /*
- * Support for network filter kernel extensions
- * Justin C. Walker, 990319
- */
- #ifndef NET_KEXT_NET_H
- #define NET_KEXT_NET_H
-
- #include <sys/queue.h>
- #include <sys/socketvar.h>
-
- struct mbuf;
- struct socket;
- struct uio;
- struct sockbuf;
- struct sockaddr;
- struct kextcb;
- struct protosw;
- struct sockif;
- struct sockutil;
- struct sockopt;
-
- /*
- * This structure gives access to the functionality of the filter.
- * The kextcb provides the link from the socket structure.
- */
- struct NFDescriptor
- { TAILQ_ENTRY(NFDescriptor) nf_next; /* protosw chain */
- TAILQ_ENTRY(NFDescriptor) nf_list; /* descriptor list */
- unsigned int nf_handle; /* Identifier */
- int nf_flags;
- /* Dispatch for PF_FILTER control */
- int (*nf_connect)(); /* Make contact */
- void (*nf_disconnect)(); /* Break contact */
- int (*nf_read)(); /* Get data from filter */
- int (*nf_write)(); /* Send data to filter */
- int (*nf_get)(); /* Get filter config */
- int (*nf_set)(); /* Set filter config */
- /*
- * Socket function dispatch vectors - copied to kextcb
- * during socreate()
- */
- struct sockif *nf_soif; /* Socket functions */
- struct sockutil *nf_soutil; /* Sockbuf utility functions */
- u_long reserved[4]; /* for future use if needed */
- };
-
- #define NFD_GLOBAL 0x01
- #define NFD_PROG 0x02
- #define NFD_VISIBLE 0x80000000
-
- #define NFF_BEFORE 0x01
- #define NFF_AFTER 0x02
-
- #ifdef KERNEL
- /* How to register: filter, insert location, target protosw, flags */
- extern int register_sockfilter(struct NFDescriptor *,
- struct NFDescriptor *,
- struct protosw *, int);
- /* How to unregister: filter, original protosw, flags */
- extern int unregister_sockfilter(struct NFDescriptor *, struct protosw *, int);
-
- TAILQ_HEAD(nf_list, NFDescriptor);
-
- extern struct nf_list nf_list;
- #endif
-
- #define NKE_OK 0
- #define NKE_REMOVE -1
-
- /*
- * Interface structure for inserting an installed socket NKE into an
- * existing socket.
- * 'handle' is the NKE to be inserted, 'where' is an insertion point,
- * and flags dictate the position of the to-be-inserted NKE relative to
- * the 'where' NKE. If the latter is NULL, the flags indicate "first"
- * or "last"
- */
- struct so_nke
- { unsigned int nke_handle;
- unsigned int nke_where;
- int nke_flags; /* NFF_BEFORE, NFF_AFTER: net/kext_net.h */
- unsigned long reserved[4]; /* for future use */
- };
-
- /*
- * sockif:
- * Contains socket interface:
- * dispatch vector abstracting the interface between protocols and
- * the socket layer.
- * TODO: add sf_sosense()
- */
- struct sockif
- { int (*sf_soabort)(struct socket *, struct kextcb *);
- int (*sf_soaccept)(struct socket *, struct sockaddr **,
- struct kextcb *);
- int (*sf_sobind)(struct socket *, struct sockaddr *, struct kextcb *);
- int (*sf_soclose)(struct socket *, struct kextcb *);
- int (*sf_soconnect)(struct socket *, struct sockaddr *,
- struct kextcb *);
- int (*sf_soconnect2)(struct socket *, struct socket *,
- struct kextcb *);
- int (*sf_socontrol)(struct socket *, struct sockopt *,
- struct kextcb *);
- int (*sf_socreate)(struct socket *, struct protosw *, struct kextcb *);
- int (*sf_sodisconnect)(struct socket *, struct kextcb *);
- int (*sf_sofree)(struct socket *, struct kextcb *);
- int (*sf_sogetopt)(struct socket *, int, int, struct mbuf **,
- struct kextcb *);
- int (*sf_sohasoutofband)(struct socket *, struct kextcb *);
- int (*sf_solisten)(struct socket *, struct kextcb *);
- int (*sf_soreceive)(struct socket *, struct sockaddr **, struct uio **,
- struct mbuf **, struct mbuf **, int *,
- struct kextcb *);
- int (*sf_sorflush)(struct socket *, struct kextcb *);
- int (*sf_sosend)(struct socket *, struct sockaddr **, struct uio **,
- struct mbuf **, struct mbuf **, int *,
- struct kextcb *);
- int (*sf_sosetopt)(struct socket *, int, int, struct mbuf *,
- struct kextcb *);
- int (*sf_soshutdown)(struct socket *, int, struct kextcb *);
- /* Calls sorwakeup() */
- int (*sf_socantrcvmore)(struct socket *, struct kextcb *);
- /* Calls sowwakeup() */
- int (*sf_socantsendmore)(struct socket *, struct kextcb *);
- /* Calls soqinsque(), sorwakeup(), sowwakeup() */
- int (*sf_soisconnected)(struct socket *, struct kextcb *);
- int (*sf_soisconnecting)(struct socket *, struct kextcb *);
- /* Calls sowwakeup(), sorwakeup() */
- int (*sf_soisdisconnected)(struct socket *, struct kextcb *);
- /* Calls sowwakeup(), sorwakeup() */
- int (*sf_soisdisconnecting)(struct socket *, struct kextcb *);
- /* Calls soreserve(), soqinsque(), soqremque(), sorwakeup() */
- struct socket *(*sf_sonewconn1)(struct socket *, int, struct kextcb *);
- int (*sf_soqinsque)(struct socket *, struct socket *, int,
- struct kextcb *);
- int (*sf_soqremque)(struct socket *, int, struct kextcb *);
- int (*sf_soreserve)(struct socket *, u_long, u_long, struct kextcb *);
- int (*sf_sowakeup)(struct socket *, struct sockbuf *,
- struct kextcb *);
- u_long reserved[4];
- };
-
-
- /*
- * sockutil:
- * Contains the utility functions for socket layer access
- */
- struct sockutil
- { /* Sleeps if locked */
- int (*su_sb_lock)(struct sockbuf *, struct kextcb *);
- /* Conditionally calls sbappendrecord, Calls sbcompress */
- int (*su_sbappend)(struct sockbuf *, struct mbuf *, struct kextcb *);
- /* Calls sbspace(), sballoc() */
- int (*su_sbappendaddr)(struct sockbuf *, struct sockaddr *,
- struct mbuf *, struct mbuf *, struct kextcb *);
- /* Calls sbspace(), sballoc() */
- int (*su_sbappendcontrol)(struct sockbuf *, struct mbuf *,
- struct mbuf *, struct kextcb *);
- /* Calls sballoc(), sbcompress() */
- int (*su_sbappendrecord)(struct sockbuf *, struct mbuf *,
- struct kextcb *);
- /* Calls sballoc() */
- int (*su_sbcompress)(struct sockbuf *, struct mbuf *, struct mbuf *,
- struct kextcb *);
- /* Calls sbfree() */
- int (*su_sbdrop)(struct sockbuf *, int, struct kextcb *);
- /* Calls sbfree() */
- int (*su_sbdroprecord)(struct sockbuf *, struct kextcb *);
- /* Calls sbdrop() */
- int (*su_sbflush)(struct sockbuf *, struct kextcb *);
- /* Calls sballoc(), sbcompress() */
- int (*su_sbinsertoob)(struct sockbuf *, struct mbuf *,
- struct kextcb *);
- /* Calls sbflush() */
- int (*su_sbrelease)(struct sockbuf *, struct kextcb *);
- int (*su_sbreserve)(struct sockbuf *, u_long, struct kextcb *);
- /* Calls tsleep() */
- int (*su_sbwait)(struct sockbuf *, struct kextcb *);
- u_long reserved[4];
- };
-
- #endif
-