Commit | Line | Data |
---|---|---|
15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1982, 1986 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
01e1b05c RG |
33 | * from: @(#)protosw.h 7.8 (Berkeley) 4/28/91 |
34 | * $Id$ | |
15637ed4 RG |
35 | */ |
36 | ||
37 | /* | |
38 | * Protocol switch table. | |
39 | * | |
40 | * Each protocol has a handle initializing one of these structures, | |
41 | * which is used for protocol-protocol and system-protocol communication. | |
42 | * | |
43 | * A protocol is called through the pr_init entry before any other. | |
44 | * Thereafter it is called every 200ms through the pr_fasttimo entry and | |
45 | * every 500ms through the pr_slowtimo for timer based actions. | |
46 | * The system will call the pr_drain entry if it is low on space and | |
47 | * this should throw away any non-critical data. | |
48 | * | |
49 | * Protocols pass data between themselves as chains of mbufs using | |
50 | * the pr_input and pr_output hooks. Pr_input passes data up (towards | |
51 | * UNIX) and pr_output passes it down (towards the imps); control | |
52 | * information passes up and down on pr_ctlinput and pr_ctloutput. | |
53 | * The protocol is responsible for the space occupied by any the | |
54 | * arguments to these entries and must dispose it. | |
55 | * | |
56 | * The userreq routine interfaces protocols to the system and is | |
57 | * described below. | |
58 | */ | |
59 | struct protosw { | |
60 | short pr_type; /* socket type used for */ | |
61 | struct domain *pr_domain; /* domain protocol a member of */ | |
62 | short pr_protocol; /* protocol number */ | |
63 | short pr_flags; /* see below */ | |
64 | /* protocol-protocol hooks */ | |
65 | int (*pr_input)(); /* input to protocol (from below) */ | |
66 | int (*pr_output)(); /* output to protocol (from above) */ | |
67 | int (*pr_ctlinput)(); /* control input (from below) */ | |
68 | int (*pr_ctloutput)(); /* control output (from above) */ | |
69 | /* user-protocol hook */ | |
70 | int (*pr_usrreq)(); /* user request: see list below */ | |
71 | /* utility hooks */ | |
72 | int (*pr_init)(); /* initialization hook */ | |
73 | int (*pr_fasttimo)(); /* fast timeout (200ms) */ | |
74 | int (*pr_slowtimo)(); /* slow timeout (500ms) */ | |
75 | int (*pr_drain)(); /* flush any excess space possible */ | |
76 | }; | |
77 | ||
78 | #define PR_SLOWHZ 2 /* 2 slow timeouts per second */ | |
79 | #define PR_FASTHZ 5 /* 5 fast timeouts per second */ | |
80 | ||
81 | /* | |
82 | * Values for pr_flags. | |
83 | * PR_ADDR requires PR_ATOMIC; | |
84 | * PR_ADDR and PR_CONNREQUIRED are mutually exclusive. | |
85 | */ | |
86 | #define PR_ATOMIC 0x01 /* exchange atomic messages only */ | |
87 | #define PR_ADDR 0x02 /* addresses given with messages */ | |
88 | #define PR_CONNREQUIRED 0x04 /* connection required by protocol */ | |
89 | #define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */ | |
90 | #define PR_RIGHTS 0x10 /* passes capabilities */ | |
91 | ||
92 | /* | |
93 | * The arguments to usrreq are: | |
94 | * (*protosw[].pr_usrreq)(up, req, m, nam, opt); | |
95 | * where up is a (struct socket *), req is one of these requests, | |
96 | * m is a optional mbuf chain containing a message, | |
97 | * nam is an optional mbuf chain containing an address, | |
98 | * and opt is a pointer to a socketopt structure or nil. | |
99 | * The protocol is responsible for disposal of the mbuf chain m, | |
100 | * the caller is responsible for any space held by nam and opt. | |
101 | * A non-zero return from usrreq gives an | |
102 | * UNIX error number which should be passed to higher level software. | |
103 | */ | |
104 | #define PRU_ATTACH 0 /* attach protocol to up */ | |
105 | #define PRU_DETACH 1 /* detach protocol from up */ | |
106 | #define PRU_BIND 2 /* bind socket to address */ | |
107 | #define PRU_LISTEN 3 /* listen for connection */ | |
108 | #define PRU_CONNECT 4 /* establish connection to peer */ | |
109 | #define PRU_ACCEPT 5 /* accept connection from peer */ | |
110 | #define PRU_DISCONNECT 6 /* disconnect from peer */ | |
111 | #define PRU_SHUTDOWN 7 /* won't send any more data */ | |
112 | #define PRU_RCVD 8 /* have taken data; more room now */ | |
113 | #define PRU_SEND 9 /* send this data */ | |
114 | #define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */ | |
115 | #define PRU_CONTROL 11 /* control operations on protocol */ | |
116 | #define PRU_SENSE 12 /* return status into m */ | |
117 | #define PRU_RCVOOB 13 /* retrieve out of band data */ | |
118 | #define PRU_SENDOOB 14 /* send out of band data */ | |
119 | #define PRU_SOCKADDR 15 /* fetch socket's address */ | |
120 | #define PRU_PEERADDR 16 /* fetch peer's address */ | |
121 | #define PRU_CONNECT2 17 /* connect two sockets */ | |
122 | /* begin for protocols internal use */ | |
123 | #define PRU_FASTTIMO 18 /* 200ms timeout */ | |
124 | #define PRU_SLOWTIMO 19 /* 500ms timeout */ | |
125 | #define PRU_PROTORCV 20 /* receive from below */ | |
126 | #define PRU_PROTOSEND 21 /* send to below */ | |
127 | ||
128 | #define PRU_NREQ 21 | |
129 | ||
130 | #ifdef PRUREQUESTS | |
131 | char *prurequests[] = { | |
132 | "ATTACH", "DETACH", "BIND", "LISTEN", | |
133 | "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN", | |
134 | "RCVD", "SEND", "ABORT", "CONTROL", | |
135 | "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR", | |
136 | "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO", | |
137 | "PROTORCV", "PROTOSEND", | |
138 | }; | |
139 | #endif | |
140 | ||
141 | /* | |
142 | * The arguments to the ctlinput routine are | |
143 | * (*protosw[].pr_ctlinput)(cmd, sa, arg); | |
144 | * where cmd is one of the commands below, sa is a pointer to a sockaddr, | |
145 | * and arg is an optional caddr_t argument used within a protocol family. | |
146 | */ | |
147 | #define PRC_IFDOWN 0 /* interface transition */ | |
148 | #define PRC_ROUTEDEAD 1 /* select new route if possible ??? */ | |
149 | #define PRC_QUENCH2 3 /* DEC congestion bit says slow down */ | |
150 | #define PRC_QUENCH 4 /* some one said to slow down */ | |
151 | #define PRC_MSGSIZE 5 /* message size forced drop */ | |
152 | #define PRC_HOSTDEAD 6 /* host appears to be down */ | |
153 | #define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */ | |
154 | #define PRC_UNREACH_NET 8 /* no route to network */ | |
155 | #define PRC_UNREACH_HOST 9 /* no route to host */ | |
156 | #define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */ | |
157 | #define PRC_UNREACH_PORT 11 /* bad port # */ | |
158 | /* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */ | |
159 | #define PRC_UNREACH_SRCFAIL 13 /* source route failed */ | |
160 | #define PRC_REDIRECT_NET 14 /* net routing redirect */ | |
161 | #define PRC_REDIRECT_HOST 15 /* host routing redirect */ | |
162 | #define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */ | |
163 | #define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */ | |
164 | #define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */ | |
165 | #define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */ | |
166 | #define PRC_PARAMPROB 20 /* header incorrect */ | |
167 | ||
168 | #define PRC_NCMDS 21 | |
169 | ||
170 | #define PRC_IS_REDIRECT(cmd) \ | |
171 | ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST) | |
172 | ||
173 | #ifdef PRCREQUESTS | |
174 | char *prcrequests[] = { | |
175 | "IFDOWN", "ROUTEDEAD", "#2", "DEC-BIT-QUENCH2", | |
176 | "QUENCH", "MSGSIZE", "HOSTDEAD", "#7", | |
177 | "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH", | |
178 | "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT", | |
179 | "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS", | |
180 | "PARAMPROB" | |
181 | }; | |
182 | #endif | |
183 | ||
184 | /* | |
185 | * The arguments to ctloutput are: | |
186 | * (*protosw[].pr_ctloutput)(req, so, level, optname, optval); | |
187 | * req is one of the actions listed below, so is a (struct socket *), | |
188 | * level is an indication of which protocol layer the option is intended. | |
189 | * optname is a protocol dependent socket option request, | |
190 | * optval is a pointer to a mbuf-chain pointer, for value-return results. | |
191 | * The protocol is responsible for disposal of the mbuf chain *optval | |
192 | * if supplied, | |
193 | * the caller is responsible for any space held by *optval, when returned. | |
194 | * A non-zero return from usrreq gives an | |
195 | * UNIX error number which should be passed to higher level software. | |
196 | */ | |
197 | #define PRCO_GETOPT 0 | |
198 | #define PRCO_SETOPT 1 | |
199 | ||
200 | #define PRCO_NCMDS 2 | |
201 | ||
202 | #ifdef PRCOREQUESTS | |
203 | char *prcorequests[] = { | |
204 | "GETOPT", "SETOPT", | |
205 | }; | |
206 | #endif | |
207 | ||
208 | #ifdef KERNEL | |
209 | extern struct protosw *pffindproto(), *pffindtype(); | |
210 | #endif |