1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/* $OpenBSD: protosw.h,v 1.31 2018/01/23 20:49:58 bluhm Exp $ */
/* $NetBSD: protosw.h,v 1.10 1996/04/09 20:55:32 cgd Exp $ */
/*-
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)protosw.h 8.1 (Berkeley) 6/2/93
*/
/*
* Protocol switch table.
*
* Each protocol has a handle initializing one of these structures,
* which is used for protocol-protocol and system-protocol communication.
*
* A protocol is called through the pr_init entry before any other.
* Thereafter it is called every 200ms through the pr_fasttimo entry and
* every 500ms through the pr_slowtimo for timer based actions.
*
* Protocols pass data between themselves as chains of mbufs using
* the pr_input and pr_output hooks. Pr_input passes data up (towards
* UNIX) and pr_output passes it down (towards the imps); control
* information passes up and down on pr_ctlinput and pr_ctloutput.
* The protocol is responsible for the space occupied by any the
* arguments to these entries and must dispose it.
*
* The userreq routine interfaces protocols to the system and is
* described below.
*/
struct mbuf;
struct sockaddr;
struct socket;
struct domain;
struct proc;
struct protosw {
short pr_type; /* socket type used for */
struct domain *pr_domain; /* domain protocol a member of */
short pr_protocol; /* protocol number */
short pr_flags; /* see below */
/* protocol-protocol hooks */
/* input to protocol (from below) */
int (*pr_input)(struct mbuf **, int *, int, int);
/* output to protocol (from above) */
int (*pr_output)(struct mbuf *, struct socket *, struct sockaddr *,
struct mbuf *);
/* control input (from below) */
void (*pr_ctlinput)(int, struct sockaddr *, u_int, void *);
/* control output (from above) */
int (*pr_ctloutput)(int, struct socket *, int, int, struct mbuf *);
/* user-protocol hook */
/* user request: see list below */
int (*pr_usrreq)(struct socket *, int, struct mbuf *,
struct mbuf *, struct mbuf *, struct proc *);
int (*pr_attach)(struct socket *, int);
int (*pr_detach)(struct socket *);
/* utility hooks */
void (*pr_init)(void); /* initialization hook */
void (*pr_fasttimo)(void); /* fast timeout (200ms) */
void (*pr_slowtimo)(void); /* slow timeout (500ms) */
/* sysctl for protocol */
int (*pr_sysctl)(int *, u_int, void *, size_t *, void *, size_t);
};
#define PR_SLOWHZ 2 /* 2 slow timeouts per second */
#define PR_FASTHZ 5 /* 5 fast timeouts per second */
/*
* Values for pr_flags.
* PR_ADDR requires PR_ATOMIC;
* PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
*/
#define PR_ATOMIC 0x01 /* exchange atomic messages only */
#define PR_ADDR 0x02 /* addresses given with messages */
#define PR_CONNREQUIRED 0x04 /* connection required by protocol */
#define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
#define PR_RIGHTS 0x10 /* passes capabilities */
#define PR_ABRTACPTDIS 0x20 /* abort on accept(2) to disconnected
socket */
#define PR_SPLICE 0x40 /* socket splicing is possible */
/*
* The arguments to usrreq are:
* (*protosw[].pr_usrreq)(up, req, m, nam, opt);
* where up is a (struct socket *), req is one of these requests,
* m is a optional mbuf chain containing a message,
* nam is an optional mbuf chain containing an address,
* and opt is a pointer to a socketopt structure or nil.
* The protocol is responsible for disposal of the mbuf chain m,
* the caller is responsible for any space held by nam and opt.
* A non-zero return from usrreq gives an
* UNIX error number which should be passed to higher level software.
*/
#define PRU_ATTACH 0 /* attach protocol to up */
#define PRU_DETACH 1 /* detach protocol from up */
#define PRU_BIND 2 /* bind socket to address */
#define PRU_LISTEN 3 /* listen for connection */
#define PRU_CONNECT 4 /* establish connection to peer */
#define PRU_ACCEPT 5 /* accept connection from peer */
#define PRU_DISCONNECT 6 /* disconnect from peer */
#define PRU_SHUTDOWN 7 /* won't send any more data */
#define PRU_RCVD 8 /* have taken data; more room now */
#define PRU_SEND 9 /* send this data */
#define PRU_ABORT 10 /* abort (fast DISCONNECT, DETACH) */
#define PRU_CONTROL 11 /* control operations on protocol */
#define PRU_SENSE 12 /* return status into m */
#define PRU_RCVOOB 13 /* retrieve out of band data */
#define PRU_SENDOOB 14 /* send out of band data */
#define PRU_SOCKADDR 15 /* fetch socket's address */
#define PRU_PEERADDR 16 /* fetch peer's address */
#define PRU_CONNECT2 17 /* connect two sockets */
/* begin for protocols internal use */
#define PRU_FASTTIMO 18 /* 200ms timeout */
#define PRU_SLOWTIMO 19 /* 500ms timeout */
#define PRU_PROTORCV 20 /* receive from below */
#define PRU_PROTOSEND 21 /* send to below */
#define PRU_NREQ 22
#ifdef PRUREQUESTS
const char *prurequests[] = {
"ATTACH", "DETACH", "BIND", "LISTEN",
"CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
"RCVD", "SEND", "ABORT", "CONTROL",
"SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
"PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
"PROTORCV", "PROTOSEND",
};
#endif
/*
* The arguments to the ctlinput routine are
* (*protosw[].pr_ctlinput)(cmd, sa, arg);
* where cmd is one of the commands below, sa is a pointer to a sockaddr,
* and arg is an optional caddr_t argument used within a protocol family.
*/
#define PRC_IFDOWN 0 /* interface transition */
#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
#define PRC_MTUINC 2 /* increase in mtu to host */
#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
#define PRC_QUENCH 4 /* some one said to slow down */
#define PRC_MSGSIZE 5 /* message size forced drop */
#define PRC_HOSTDEAD 6 /* host appears to be down */
#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */
#define PRC_UNREACH_NET 8 /* no route to network */
#define PRC_UNREACH_HOST 9 /* no route to host */
#define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */
#define PRC_UNREACH_PORT 11 /* bad port # */
/* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */
#define PRC_UNREACH_SRCFAIL 13 /* source route failed */
#define PRC_REDIRECT_NET 14 /* net routing redirect */
#define PRC_REDIRECT_HOST 15 /* host routing redirect */
#define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */
#define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */
#define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */
#define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */
#define PRC_PARAMPROB 20 /* header incorrect */
#define PRC_NCMDS 21
#define PRC_IS_REDIRECT(cmd) \
((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
#ifdef PRCREQUESTS
char *prcrequests[] = {
"IFDOWN", "ROUTEDEAD", "MTUINC", "DEC-BIT-QUENCH2",
"QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
"NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
"#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
"TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
"PARAMPROB"
};
#endif
/*
* The arguments to ctloutput are:
* (*protosw[].pr_ctloutput)(req, so, level, optname, optval);
* req is one of the actions listed below, so is a (struct socket *),
* level is an indication of which protocol layer the option is intended.
* optname is a protocol dependent socket option request,
* optval is a pointer to a mbuf-chain pointer, for value-return results.
* The protocol is responsible for disposal of the mbuf chain *optval
* if supplied,
* the caller is responsible for any space held by *optval, when returned.
* A non-zero return from usrreq gives an
* UNIX error number which should be passed to higher level software.
*/
#define PRCO_GETOPT 0
#define PRCO_SETOPT 1
#define PRCO_NCMDS 2
#ifdef PRCOREQUESTS
char *prcorequests[] = {
"GETOPT", "SETOPT",
};
#endif
#ifdef _KERNEL
struct sockaddr;
const struct protosw *pffindproto(int, int, int);
const struct protosw *pffindtype(int, int);
void pfctlinput(int, struct sockaddr *);
extern u_char ip_protox[];
extern const struct protosw inetsw[];
#endif
|