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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (C) 1999 Apple Computer, Inc. */
23: /*
24: * Support for network filter kernel extensions
25: * Justin C. Walker, 990319
26: */
27: #ifndef NET_KEXT_NET_H
28: #define NET_KEXT_NET_H
29:
30: #include <sys/queue.h>
31: #include <sys/socketvar.h>
32:
33: struct mbuf;
34: struct socket;
35: struct uio;
36: struct sockbuf;
37: struct sockaddr;
38: struct kextcb;
39: struct protosw;
40: struct sockif;
41: struct sockutil;
42: struct sockopt;
43:
44: /*
45: * This structure gives access to the functionality of the filter.
46: * The kextcb provides the link from the socket structure.
47: */
48: struct NFDescriptor
49: { TAILQ_ENTRY(NFDescriptor) nf_next; /* protosw chain */
50: TAILQ_ENTRY(NFDescriptor) nf_list; /* descriptor list */
51: unsigned int nf_handle; /* Identifier */
52: int nf_flags;
53: /* Dispatch for PF_FILTER control */
54: int (*nf_connect)(); /* Make contact */
55: void (*nf_disconnect)(); /* Break contact */
56: int (*nf_read)(); /* Get data from filter */
57: int (*nf_write)(); /* Send data to filter */
58: int (*nf_get)(); /* Get filter config */
59: int (*nf_set)(); /* Set filter config */
60: /*
61: * Socket function dispatch vectors - copied to kextcb
62: * during socreate()
63: */
64: struct sockif *nf_soif; /* Socket functions */
65: struct sockutil *nf_soutil; /* Sockbuf utility functions */
66: };
67:
68: #define NFD_GLOBAL 0x01
69: #define NFD_PROG 0x02
70: #define NFD_VISIBLE 0x80000000
71:
72: #define NFF_BEFORE 0x01
73: #define NFF_AFTER 0x02
74:
75: #ifdef KERNEL
76: /* How to register: filter, insert location, target protosw, flags */
77: extern int register_sockfilter(struct NFDescriptor *,
78: struct NFDescriptor *,
79: struct protosw *, int);
80: /* How to unregister: filter, original protosw, flags */
81: extern int unregister_sockfilter(struct NFDescriptor *, struct protosw *, int);
82:
83: TAILQ_HEAD(nf_list, NFDescriptor);
84:
85: extern struct nf_list nf_list;
86: #endif
87:
88: #define NKE_OK 0
89: #define NKE_REMOVE -1
90:
91: /*
92: * Interface structure for inserting an installed socket NKE into an
93: * existing socket.
94: * 'handle' is the NKE to be inserted, 'where' is an insertion point,
95: * and flags dictate the position of the to-be-inserted NKE relative to
96: * the 'where' NKE. If the latter is NULL, the flags indicate "first"
97: * or "last"
98: */
99: struct so_nke
100: { unsigned int nke_handle;
101: unsigned int nke_where;
102: int nke_flags; /* NFF_BEFORE, NFF_AFTER: net/kext_net.h */
103: };
104:
105: /*
106: * sockif:
107: * Contains socket interface:
108: * dispatch vector abstracting the interface between protocols and
109: * the socket layer.
110: * TODO: add sf_sosense()
111: */
112: struct sockif
113: { int (*sf_soabort)(struct socket *, struct kextcb *);
114: int (*sf_soaccept)(struct socket *, struct sockaddr **,
115: struct kextcb *);
116: int (*sf_sobind)(struct socket *, struct sockaddr *, struct kextcb *);
117: int (*sf_soclose)(struct socket *, struct kextcb *);
118: int (*sf_soconnect)(struct socket *, struct sockaddr *,
119: struct kextcb *);
120: int (*sf_soconnect2)(struct socket *, struct socket *,
121: struct kextcb *);
122: int (*sf_socontrol)(struct socket *, struct sockopt *,
123: struct kextcb *);
124: int (*sf_socreate)(struct socket *, struct protosw *, struct kextcb *);
125: int (*sf_sodisconnect)(struct socket *, struct kextcb *);
126: int (*sf_sofree)(struct socket *, struct kextcb *);
127: int (*sf_sogetopt)(struct socket *, int, int, struct mbuf **,
128: struct kextcb *);
129: int (*sf_sohasoutofband)(struct socket *, struct kextcb *);
130: int (*sf_solisten)(struct socket *, struct kextcb *);
131: int (*sf_soreceive)(struct socket *, struct sockaddr **, struct uio **,
132: struct mbuf **, struct mbuf **, int *,
133: struct kextcb *);
134: int (*sf_sorflush)(struct socket *, struct kextcb *);
135: int (*sf_sosend)(struct socket *, struct sockaddr **, struct uio **,
136: struct mbuf **, struct mbuf **, int *,
137: struct kextcb *);
138: int (*sf_sosetopt)(struct socket *, int, int, struct mbuf *,
139: struct kextcb *);
140: int (*sf_soshutdown)(struct socket *, int, struct kextcb *);
141: /* Calls sorwakeup() */
142: int (*sf_socantrcvmore)(struct socket *, struct kextcb *);
143: /* Calls sowwakeup() */
144: int (*sf_socantsendmore)(struct socket *, struct kextcb *);
145: /* Calls soqinsque(), sorwakeup(), sowwakeup() */
146: int (*sf_soisconnected)(struct socket *, struct kextcb *);
147: int (*sf_soisconnecting)(struct socket *, struct kextcb *);
148: /* Calls sowwakeup(), sorwakeup() */
149: int (*sf_soisdisconnected)(struct socket *, struct kextcb *);
150: /* Calls sowwakeup(), sorwakeup() */
151: int (*sf_soisdisconnecting)(struct socket *, struct kextcb *);
152: /* Calls soreserve(), soqinsque(), soqremque(), sorwakeup() */
153: struct socket *(*sf_sonewconn1)(struct socket *, int, struct kextcb *);
154: int (*sf_soqinsque)(struct socket *, struct socket *, int,
155: struct kextcb *);
156: int (*sf_soqremque)(struct socket *, int, struct kextcb *);
157: int (*sf_soreserve)(struct socket *, u_long, u_long, struct kextcb *);
158: int (*sf_sowakeup)(struct socket *, struct sockbuf *,
159: struct kextcb *);
160: };
161:
162:
163: /*
164: * sockutil:
165: * Contains the utility functions for socket layer access
166: */
167: struct sockutil
168: { /* Sleeps if locked */
169: int (*su_sb_lock)(struct sockbuf *, struct kextcb *);
170: /* Conditionally calls sbappendrecord, Calls sbcompress */
171: int (*su_sbappend)(struct sockbuf *, struct mbuf *, struct kextcb *);
172: /* Calls sbspace(), sballoc() */
173: int (*su_sbappendaddr)(struct sockbuf *, struct sockaddr *,
174: struct mbuf *, struct mbuf *, struct kextcb *);
175: /* Calls sbspace(), sballoc() */
176: int (*su_sbappendcontrol)(struct sockbuf *, struct mbuf *,
177: struct mbuf *, struct kextcb *);
178: /* Calls sballoc(), sbcompress() */
179: int (*su_sbappendrecord)(struct sockbuf *, struct mbuf *,
180: struct kextcb *);
181: /* Calls sballoc() */
182: int (*su_sbcompress)(struct sockbuf *, struct mbuf *, struct mbuf *,
183: struct kextcb *);
184: /* Calls sbfree() */
185: int (*su_sbdrop)(struct sockbuf *, int, struct kextcb *);
186: /* Calls sbfree() */
187: int (*su_sbdroprecord)(struct sockbuf *, struct kextcb *);
188: /* Calls sbdrop() */
189: int (*su_sbflush)(struct sockbuf *, struct kextcb *);
190: /* Calls sballoc(), sbcompress() */
191: int (*su_sbinsertoob)(struct sockbuf *, struct mbuf *,
192: struct kextcb *);
193: /* Calls sbflush() */
194: int (*su_sbrelease)(struct sockbuf *, struct kextcb *);
195: int (*su_sbreserve)(struct sockbuf *, u_long, struct kextcb *);
196: /* Calls tsleep() */
197: int (*su_sbwait)(struct sockbuf *, struct kextcb *);
198: };
199:
200: #endif
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