protosw.h revision 136692
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)protosw.h 8.1 (Berkeley) 6/2/93 30 * $FreeBSD: head/sys/sys/protosw.h 136692 2004-10-19 15:13:30Z andre $ 31 */ 32 33#ifndef _SYS_PROTOSW_H_ 34#define _SYS_PROTOSW_H_ 35 36/* Forward declare these structures referenced from prototypes below. */ 37struct mbuf; 38struct thread; 39struct sockaddr; 40struct socket; 41struct sockopt; 42 43/*#ifdef _KERNEL*/ 44/* 45 * Protocol switch table. 46 * 47 * Each protocol has a handle initializing one of these structures, 48 * which is used for protocol-protocol and system-protocol communication. 49 * 50 * A protocol is called through the pr_init entry before any other. 51 * Thereafter it is called every 200ms through the pr_fasttimo entry and 52 * every 500ms through the pr_slowtimo for timer based actions. 53 * The system will call the pr_drain entry if it is low on space and 54 * this should throw away any non-critical data. 55 * 56 * Protocols pass data between themselves as chains of mbufs using 57 * the pr_input and pr_output hooks. Pr_input passes data up (towards 58 * the users) and pr_output passes it down (towards the interfaces); control 59 * information passes up and down on pr_ctlinput and pr_ctloutput. 60 * The protocol is responsible for the space occupied by any the 61 * arguments to these entries and must dispose it. 62 * 63 * In retrospect, it would be a lot nicer to use an interface 64 * similar to the vnode VOP interface. 65 */ 66/* USE THESE FOR YOUR PROTOTYPES ! */ 67typedef void pr_input_t (struct mbuf *, int); 68typedef int pr_input6_t (struct mbuf **, int*, int); /* XXX FIX THIS */ 69typedef void pr_in_input_t (struct mbuf *, int, int); /* XXX FIX THIS */ 70typedef int pr_output_t (struct mbuf *, struct socket *); 71typedef int pr_in_output_t (struct mbuf *, struct socket *, struct sockaddr *); 72typedef void pr_ctlinput_t (int, struct sockaddr *, void *); 73typedef int pr_ctloutput_t (struct socket *, struct sockopt *); 74typedef void pr_init_t (void); 75typedef void pr_fasttimo_t (void); 76typedef void pr_slowtimo_t (void); 77typedef void pr_drain_t (void); 78 79typedef int pr_usrreq_t(struct socket *, int, struct mbuf *, 80 struct mbuf *, struct mbuf *, struct thread *); 81 82struct protosw { 83 short pr_type; /* socket type used for */ 84 struct domain *pr_domain; /* domain protocol a member of */ 85 short pr_protocol; /* protocol number */ 86 short pr_flags; /* see below */ 87/* protocol-protocol hooks */ 88 pr_input_t *pr_input; /* input to protocol (from below) */ 89 pr_output_t *pr_output; /* output to protocol (from above) */ 90 pr_ctlinput_t *pr_ctlinput; /* control input (from below) */ 91 pr_ctloutput_t *pr_ctloutput; /* control output (from above) */ 92/* user-protocol hook */ 93 pr_usrreq_t *pr_ousrreq; 94/* utility hooks */ 95 pr_init_t *pr_init; 96 pr_fasttimo_t *pr_fasttimo; /* fast timeout (200ms) */ 97 pr_slowtimo_t *pr_slowtimo; /* slow timeout (500ms) */ 98 pr_drain_t *pr_drain; /* flush any excess space possible */ 99 100 struct pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */ 101}; 102/*#endif*/ 103 104#define PR_SLOWHZ 2 /* 2 slow timeouts per second */ 105#define PR_FASTHZ 5 /* 5 fast timeouts per second */ 106 107/* 108 * This number should be defined again within each protocol family to avoid 109 * confusion. 110 */ 111#define PROTO_SPACER 32767 /* spacer for loadable protocols */ 112 113/* 114 * Values for pr_flags. 115 * PR_ADDR requires PR_ATOMIC; 116 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive. 117 * PR_IMPLOPCL means that the protocol allows sendto without prior connect, 118 * and the protocol understands the MSG_EOF flag. The first property is 119 * is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed 120 * anyhow). 121 */ 122#define PR_ATOMIC 0x01 /* exchange atomic messages only */ 123#define PR_ADDR 0x02 /* addresses given with messages */ 124#define PR_CONNREQUIRED 0x04 /* connection required by protocol */ 125#define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */ 126#define PR_RIGHTS 0x10 /* passes capabilities */ 127#define PR_IMPLOPCL 0x20 /* implied open/close */ 128#define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */ 129 130/* 131 * The arguments to usrreq are: 132 * (*protosw[].pr_usrreq)(up, req, m, nam, opt); 133 * where up is a (struct socket *), req is one of these requests, 134 * m is an optional mbuf chain containing a message, 135 * nam is an optional mbuf chain containing an address, 136 * and opt is a pointer to a socketopt structure or nil. 137 * The protocol is responsible for disposal of the mbuf chain m, 138 * the caller is responsible for any space held by nam and opt. 139 * A non-zero return from usrreq gives an 140 * UNIX error number which should be passed to higher level software. 141 */ 142#define PRU_ATTACH 0 /* attach protocol to up */ 143#define PRU_DETACH 1 /* detach protocol from up */ 144#define PRU_BIND 2 /* bind socket to address */ 145#define PRU_LISTEN 3 /* listen for connection */ 146#define PRU_CONNECT 4 /* establish connection to peer */ 147#define PRU_ACCEPT 5 /* accept connection from peer */ 148#define PRU_DISCONNECT 6 /* disconnect from peer */ 149#define PRU_SHUTDOWN 7 /* won't send any more data */ 150#define PRU_RCVD 8 /* have taken data; more room now */ 151#define PRU_SEND 9 /* send this data */ 152#define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */ 153#define PRU_CONTROL 11 /* control operations on protocol */ 154#define PRU_SENSE 12 /* return status into m */ 155#define PRU_RCVOOB 13 /* retrieve out of band data */ 156#define PRU_SENDOOB 14 /* send out of band data */ 157#define PRU_SOCKADDR 15 /* fetch socket's address */ 158#define PRU_PEERADDR 16 /* fetch peer's address */ 159#define PRU_CONNECT2 17 /* connect two sockets */ 160/* begin for protocols internal use */ 161#define PRU_FASTTIMO 18 /* 200ms timeout */ 162#define PRU_SLOWTIMO 19 /* 500ms timeout */ 163#define PRU_PROTORCV 20 /* receive from below */ 164#define PRU_PROTOSEND 21 /* send to below */ 165/* end for protocol's internal use */ 166#define PRU_SEND_EOF 22 /* send and close */ 167#define PRU_NREQ 22 168 169#ifdef PRUREQUESTS 170const char *prurequests[] = { 171 "ATTACH", "DETACH", "BIND", "LISTEN", 172 "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN", 173 "RCVD", "SEND", "ABORT", "CONTROL", 174 "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR", 175 "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO", 176 "PROTORCV", "PROTOSEND", 177 "SEND_EOF", 178}; 179#endif 180 181#ifdef _KERNEL /* users shouldn't see this decl */ 182 183struct ifnet; 184struct stat; 185struct ucred; 186struct uio; 187 188/* 189 * If the ordering here looks odd, that's because it's alphabetical. 190 * Having this structure separated out from the main protoswitch is allegedly 191 * a big (12 cycles per call) lose on high-end CPUs. We will eventually 192 * migrate this stuff back into the main structure. 193 */ 194struct pr_usrreqs { 195 int (*pru_abort)(struct socket *so); 196 int (*pru_accept)(struct socket *so, struct sockaddr **nam); 197 int (*pru_attach)(struct socket *so, int proto, struct thread *td); 198 int (*pru_bind)(struct socket *so, struct sockaddr *nam, 199 struct thread *td); 200 int (*pru_connect)(struct socket *so, struct sockaddr *nam, 201 struct thread *td); 202 int (*pru_connect2)(struct socket *so1, struct socket *so2); 203 int (*pru_control)(struct socket *so, u_long cmd, caddr_t data, 204 struct ifnet *ifp, struct thread *td); 205 int (*pru_detach)(struct socket *so); 206 int (*pru_disconnect)(struct socket *so); 207 int (*pru_listen)(struct socket *so, struct thread *td); 208 int (*pru_peeraddr)(struct socket *so, struct sockaddr **nam); 209 int (*pru_rcvd)(struct socket *so, int flags); 210 int (*pru_rcvoob)(struct socket *so, struct mbuf *m, int flags); 211 int (*pru_send)(struct socket *so, int flags, struct mbuf *m, 212 struct sockaddr *addr, struct mbuf *control, 213 struct thread *td); 214#define PRUS_OOB 0x1 215#define PRUS_EOF 0x2 216#define PRUS_MORETOCOME 0x4 217 int (*pru_sense)(struct socket *so, struct stat *sb); 218 int (*pru_shutdown)(struct socket *so); 219 int (*pru_sockaddr)(struct socket *so, struct sockaddr **nam); 220 221 /* 222 * These three added later, so they are out of order. They are used 223 * for shortcutting (fast path input/output) in some protocols. 224 * XXX - that's a lie, they are not implemented yet 225 * Rather than calling sosend() etc. directly, calls are made 226 * through these entry points. For protocols which still use 227 * the generic code, these just point to those routines. 228 */ 229 int (*pru_sosend)(struct socket *so, struct sockaddr *addr, 230 struct uio *uio, struct mbuf *top, struct mbuf *control, 231 int flags, struct thread *td); 232 int (*pru_soreceive)(struct socket *so, struct sockaddr **paddr, 233 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 234 int *flagsp); 235 int (*pru_sopoll)(struct socket *so, int events, 236 struct ucred *cred, struct thread *td); 237 void (*pru_sosetlabel)(struct socket *so); 238}; 239 240/* 241 * The dummy protocol specific user requests function pointer array is 242 * initialized to the functions below. All functions return EOPNOTSUPP. 243 */ 244extern struct pr_usrreqs nousrreqs; 245 246int pru_abort_notsupp(struct socket *so); 247int pru_accept_notsupp(struct socket *so, struct sockaddr **nam); 248int pru_attach_notsupp(struct socket *so, int proto, struct thread *td); 249int pru_bind_notsupp(struct socket *so, struct sockaddr *nam, 250 struct thread *td); 251int pru_connect_notsupp(struct socket *so, struct sockaddr *nam, 252 struct thread *td); 253int pru_connect2_notsupp(struct socket *so1, struct socket *so2); 254int pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data, 255 struct ifnet *ifp, struct thread *td); 256int pru_detach_notsupp(struct socket *so); 257int pru_disconnect_notsupp(struct socket *so); 258int pru_listen_notsupp(struct socket *so, struct thread *td); 259int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam); 260int pru_rcvd_notsupp(struct socket *so, int flags); 261int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags); 262int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m, 263 struct sockaddr *addr, struct mbuf *control, struct thread *td); 264int pru_sense_null(struct socket *so, struct stat *sb); 265int pru_shutdown_notsupp(struct socket *so); 266int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam); 267int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr, 268 struct uio *uio, struct mbuf *top, struct mbuf *control, int flags, 269 struct thread *td); 270int pru_soreceive_notsupp(struct socket *so, struct sockaddr **paddr, 271 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 272 int *flagsp); 273int pru_sopoll_notsupp(struct socket *so, int events, struct ucred *cred, 274 struct thread *td); 275void pru_sosetlabel_null(struct socket *so); 276 277#endif /* _KERNEL */ 278 279/* 280 * The arguments to the ctlinput routine are 281 * (*protosw[].pr_ctlinput)(cmd, sa, arg); 282 * where cmd is one of the commands below, sa is a pointer to a sockaddr, 283 * and arg is a `void *' argument used within a protocol family. 284 */ 285#define PRC_IFDOWN 0 /* interface transition */ 286#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */ 287#define PRC_IFUP 2 /* interface has come back up */ 288#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */ 289#define PRC_QUENCH 4 /* some one said to slow down */ 290#define PRC_MSGSIZE 5 /* message size forced drop */ 291#define PRC_HOSTDEAD 6 /* host appears to be down */ 292#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */ 293#define PRC_UNREACH_NET 8 /* no route to network */ 294#define PRC_UNREACH_HOST 9 /* no route to host */ 295#define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */ 296#define PRC_UNREACH_PORT 11 /* bad port # */ 297/* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */ 298#define PRC_UNREACH_SRCFAIL 13 /* source route failed */ 299#define PRC_REDIRECT_NET 14 /* net routing redirect */ 300#define PRC_REDIRECT_HOST 15 /* host routing redirect */ 301#define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */ 302#define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */ 303#define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */ 304#define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */ 305#define PRC_PARAMPROB 20 /* header incorrect */ 306#define PRC_UNREACH_ADMIN_PROHIB 21 /* packet administrativly prohibited */ 307 308#define PRC_NCMDS 22 309 310#define PRC_IS_REDIRECT(cmd) \ 311 ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST) 312 313#ifdef PRCREQUESTS 314char *prcrequests[] = { 315 "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2", 316 "QUENCH", "MSGSIZE", "HOSTDEAD", "#7", 317 "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH", 318 "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT", 319 "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS", 320 "PARAMPROB", "ADMIN-UNREACH" 321}; 322#endif 323 324/* 325 * The arguments to ctloutput are: 326 * (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p); 327 * req is one of the actions listed below, so is a (struct socket *), 328 * level is an indication of which protocol layer the option is intended. 329 * optname is a protocol dependent socket option request, 330 * optval is a pointer to a mbuf-chain pointer, for value-return results. 331 * The protocol is responsible for disposal of the mbuf chain *optval 332 * if supplied, 333 * the caller is responsible for any space held by *optval, when returned. 334 * A non-zero return from usrreq gives an 335 * UNIX error number which should be passed to higher level software. 336 */ 337#define PRCO_GETOPT 0 338#define PRCO_SETOPT 1 339 340#define PRCO_NCMDS 2 341 342#ifdef PRCOREQUESTS 343char *prcorequests[] = { 344 "GETOPT", "SETOPT", 345}; 346#endif 347 348#ifdef _KERNEL 349void pfctlinput(int, struct sockaddr *); 350void pfctlinput2(int, struct sockaddr *, void *); 351struct protosw *pffindproto(int family, int protocol, int type); 352struct protosw *pffindtype(int family, int type); 353int pf_proto_register(int family, struct protosw *npr); 354int pf_proto_unregister(int family, int protocol, int type); 355#endif 356 357#endif 358