protosw.h revision 26187
1/*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. 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 * 33 * @(#)protosw.h 8.1 (Berkeley) 6/2/93 34 * $Id: protosw.h,v 1.18 1997/05/24 17:23:10 peter Exp $ 35 */ 36 37#ifndef _SYS_PROTOSW_H_ 38#define _SYS_PROTOSW_H_ 39 40/* Forward declare these structures referenced from prototypes below. */ 41struct ifnet; 42struct mbuf; 43struct sockaddr; 44struct socket; 45struct sockproto; 46struct stat; 47struct uio; 48struct proc; 49 50/* 51 * Protocol switch table. 52 * 53 * Each protocol has a handle initializing one of these structures, 54 * which is used for protocol-protocol and system-protocol communication. 55 * 56 * A protocol is called through the pr_init entry before any other. 57 * Thereafter it is called every 200ms through the pr_fasttimo entry and 58 * every 500ms through the pr_slowtimo for timer based actions. 59 * The system will call the pr_drain entry if it is low on space and 60 * this should throw away any non-critical data. 61 * 62 * Protocols pass data between themselves as chains of mbufs using 63 * the pr_input and pr_output hooks. Pr_input passes data up (towards 64 * UNIX) and pr_output passes it down (towards the imps); control 65 * information passes up and down on pr_ctlinput and pr_ctloutput. 66 * The protocol is responsible for the space occupied by any the 67 * arguments to these entries and must dispose it. 68 * 69 * The userreq routine interfaces protocols to the system and is 70 * described below. 71 */ 72struct protosw { 73 short pr_type; /* socket type used for */ 74 struct domain *pr_domain; /* domain protocol a member of */ 75 short pr_protocol; /* protocol number */ 76 short pr_flags; /* see below */ 77/* protocol-protocol hooks */ 78 void (*pr_input) __P((struct mbuf *, int len)); 79 /* input to protocol (from below) */ 80 int (*pr_output) __P((struct mbuf *m, struct socket *so)); 81 /* output to protocol (from above) */ 82 void (*pr_ctlinput)__P((int, struct sockaddr *, void *)); 83 /* control input (from below) */ 84 int (*pr_ctloutput)__P((int, struct socket *, int, int, 85 struct mbuf **, struct proc *)); 86 /* control output (from above) */ 87/* user-protocol hook */ 88 void *pr_ousrreq; 89/* utility hooks */ 90 void (*pr_init) __P((void)); /* initialization hook */ 91 void (*pr_fasttimo) __P((void)); 92 /* fast timeout (200ms) */ 93 void (*pr_slowtimo) __P((void)); 94 /* slow timeout (500ms) */ 95 void (*pr_drain) __P((void)); 96 /* flush any excess space possible */ 97 struct pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */ 98}; 99 100#define PR_SLOWHZ 2 /* 2 slow timeouts per second */ 101#define PR_FASTHZ 5 /* 5 fast timeouts per second */ 102 103/* 104 * Values for pr_flags. 105 * PR_ADDR requires PR_ATOMIC; 106 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive. 107 * PR_IMPLOPCL means that the protocol allows sendto without prior connect, 108 * and the protocol understands the MSG_EOF flag. The first property is 109 * is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed 110 * anyhow). 111 */ 112#define PR_ATOMIC 0x01 /* exchange atomic messages only */ 113#define PR_ADDR 0x02 /* addresses given with messages */ 114#define PR_CONNREQUIRED 0x04 /* connection required by protocol */ 115#define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */ 116#define PR_RIGHTS 0x10 /* passes capabilities */ 117#define PR_IMPLOPCL 0x20 /* implied open/close */ 118 119/* 120 * The arguments to usrreq are: 121 * (*protosw[].pr_usrreq)(up, req, m, nam, opt); 122 * where up is a (struct socket *), req is one of these requests, 123 * m is a optional mbuf chain containing a message, 124 * nam is an optional mbuf chain containing an address, 125 * and opt is a pointer to a socketopt structure or nil. 126 * The protocol is responsible for disposal of the mbuf chain m, 127 * the caller is responsible for any space held by nam and opt. 128 * A non-zero return from usrreq gives an 129 * UNIX error number which should be passed to higher level software. 130 */ 131#define PRU_ATTACH 0 /* attach protocol to up */ 132#define PRU_DETACH 1 /* detach protocol from up */ 133#define PRU_BIND 2 /* bind socket to address */ 134#define PRU_LISTEN 3 /* listen for connection */ 135#define PRU_CONNECT 4 /* establish connection to peer */ 136#define PRU_ACCEPT 5 /* accept connection from peer */ 137#define PRU_DISCONNECT 6 /* disconnect from peer */ 138#define PRU_SHUTDOWN 7 /* won't send any more data */ 139#define PRU_RCVD 8 /* have taken data; more room now */ 140#define PRU_SEND 9 /* send this data */ 141#define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */ 142#define PRU_CONTROL 11 /* control operations on protocol */ 143#define PRU_SENSE 12 /* return status into m */ 144#define PRU_RCVOOB 13 /* retrieve out of band data */ 145#define PRU_SENDOOB 14 /* send out of band data */ 146#define PRU_SOCKADDR 15 /* fetch socket's address */ 147#define PRU_PEERADDR 16 /* fetch peer's address */ 148#define PRU_CONNECT2 17 /* connect two sockets */ 149/* begin for protocols internal use */ 150#define PRU_FASTTIMO 18 /* 200ms timeout */ 151#define PRU_SLOWTIMO 19 /* 500ms timeout */ 152#define PRU_PROTORCV 20 /* receive from below */ 153#define PRU_PROTOSEND 21 /* send to below */ 154/* end for protocol's internal use */ 155#define PRU_SEND_EOF 22 /* send and close */ 156#define PRU_NREQ 22 157 158#ifdef PRUREQUESTS 159char *prurequests[] = { 160 "ATTACH", "DETACH", "BIND", "LISTEN", 161 "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN", 162 "RCVD", "SEND", "ABORT", "CONTROL", 163 "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR", 164 "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO", 165 "PROTORCV", "PROTOSEND", 166 "SEND_EOF", 167}; 168#endif 169 170#ifdef KERNEL /* users shouldn't see this decl */ 171 172/* 173 * If the ordering here looks odd, that's because it's alphabetical. 174 * Having this structure separated out from the main protoswitch is allegedly 175 * a big (12 cycles per call) lose on high-end CPUs. We will eventually 176 * migrate this stuff back into the main structure. 177 */ 178struct pr_usrreqs { 179 int (*pru_abort) __P((struct socket *so)); 180 int (*pru_accept) __P((struct socket *so, struct mbuf *nam)); 181 int (*pru_attach) __P((struct socket *so, int proto, 182 struct proc *p)); 183 int (*pru_bind) __P((struct socket *so, struct mbuf *nam, 184 struct proc *p)); 185 int (*pru_connect) __P((struct socket *so, struct mbuf *nam, 186 struct proc *p)); 187 int (*pru_connect2) __P((struct socket *so1, struct socket *so2)); 188 int (*pru_control) __P((struct socket *so, int cmd, caddr_t data, 189 struct ifnet *ifp, struct proc *p)); 190 int (*pru_detach) __P((struct socket *so)); 191 int (*pru_disconnect) __P((struct socket *so)); 192 int (*pru_listen) __P((struct socket *so, struct proc *p)); 193 int (*pru_peeraddr) __P((struct socket *so, struct mbuf *nam)); 194 int (*pru_rcvd) __P((struct socket *so, int flags)); 195 int (*pru_rcvoob) __P((struct socket *so, struct mbuf *m, 196 int flags)); 197 int (*pru_send) __P((struct socket *so, int flags, struct mbuf *m, 198 struct mbuf *addr, struct mbuf *control, 199 struct proc *p)); 200#define PRUS_OOB 0x1 201#define PRUS_EOF 0x2 202 int (*pru_sense) __P((struct socket *so, struct stat *sb)); 203 int (*pru_shutdown) __P((struct socket *so)); 204 int (*pru_sockaddr) __P((struct socket *so, struct mbuf *nam)); 205 206 /* 207 * These three added later, so they are out of order. They are used 208 * for shortcutting (fast path input/output) in some protocols. 209 * XXX - that's a lie, they are not implemented yet 210 * Rather than calling sosend() etc. directly, calls are made 211 * through these entry points. For protocols which still use 212 * the generic code, these just point to those routines. 213 */ 214 int (*pru_sosend) __P((struct socket *so, struct mbuf *addr, 215 struct uio *uio, struct mbuf *top, 216 struct mbuf *control, int flags)); 217 int (*pru_soreceive) __P((struct socket *so, struct mbuf **paddr, 218 struct uio *uio, struct mbuf **mp0, 219 struct mbuf **controlp, int *flagsp)); 220 int (*pru_soselect) __P((struct socket *so, int which, 221 struct proc *p)); 222}; 223 224int pru_accept_notsupp __P((struct socket *so, struct mbuf *nam)); 225int pru_connect_notsupp __P((struct socket *so, struct mbuf *nam, 226 struct proc *p)); 227int pru_connect2_notsupp __P((struct socket *so1, struct socket *so2)); 228int pru_control_notsupp __P((struct socket *so, int cmd, caddr_t data, 229 struct ifnet *ifp, struct proc *p)); 230int pru_listen_notsupp __P((struct socket *so, struct proc *p)); 231int pru_rcvd_notsupp __P((struct socket *so, int flags)); 232int pru_rcvoob_notsupp __P((struct socket *so, struct mbuf *m, int flags)); 233int pru_sense_null __P((struct socket *so, struct stat *sb)); 234 235#endif /* KERNEL */ 236 237/* 238 * The arguments to the ctlinput routine are 239 * (*protosw[].pr_ctlinput)(cmd, sa, arg); 240 * where cmd is one of the commands below, sa is a pointer to a sockaddr, 241 * and arg is a `void *' argument used within a protocol family. 242 */ 243#define PRC_IFDOWN 0 /* interface transition */ 244#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */ 245#define PRC_IFUP 2 /* interface has come back up */ 246#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */ 247#define PRC_QUENCH 4 /* some one said to slow down */ 248#define PRC_MSGSIZE 5 /* message size forced drop */ 249#define PRC_HOSTDEAD 6 /* host appears to be down */ 250#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */ 251#define PRC_UNREACH_NET 8 /* no route to network */ 252#define PRC_UNREACH_HOST 9 /* no route to host */ 253#define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */ 254#define PRC_UNREACH_PORT 11 /* bad port # */ 255/* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */ 256#define PRC_UNREACH_SRCFAIL 13 /* source route failed */ 257#define PRC_REDIRECT_NET 14 /* net routing redirect */ 258#define PRC_REDIRECT_HOST 15 /* host routing redirect */ 259#define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */ 260#define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */ 261#define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */ 262#define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */ 263#define PRC_PARAMPROB 20 /* header incorrect */ 264 265#define PRC_NCMDS 21 266 267#define PRC_IS_REDIRECT(cmd) \ 268 ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST) 269 270#ifdef PRCREQUESTS 271char *prcrequests[] = { 272 "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2", 273 "QUENCH", "MSGSIZE", "HOSTDEAD", "#7", 274 "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH", 275 "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT", 276 "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS", 277 "PARAMPROB" 278}; 279#endif 280 281/* 282 * The arguments to ctloutput are: 283 * (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p); 284 * req is one of the actions listed below, so is a (struct socket *), 285 * level is an indication of which protocol layer the option is intended. 286 * optname is a protocol dependent socket option request, 287 * optval is a pointer to a mbuf-chain pointer, for value-return results. 288 * The protocol is responsible for disposal of the mbuf chain *optval 289 * if supplied, 290 * the caller is responsible for any space held by *optval, when returned. 291 * A non-zero return from usrreq gives an 292 * UNIX error number which should be passed to higher level software. 293 */ 294#define PRCO_GETOPT 0 295#define PRCO_SETOPT 1 296 297#define PRCO_NCMDS 2 298 299#ifdef PRCOREQUESTS 300char *prcorequests[] = { 301 "GETOPT", "SETOPT", 302}; 303#endif 304 305#ifdef KERNEL 306struct protosw *pffindproto __P((int family, int protocol, int type)); 307struct protosw *pffindtype __P((int family, int type)); 308#endif 309 310#endif 311