protosw.h revision 159374
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 159374 2006-06-07 13:09:04Z rwatson $ 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 * In earlier BSD network stacks, a single pr_usrreq() function pointer was 132 * invoked with an operation number indicating what operation was desired. 133 * We now provide individual function pointers which protocols can implement, 134 * which offers a number of benefits (such as type checking for arguments). 135 * These older constants are still present in order to support TCP debugging. 136 * 137 * The arguments to usrreq were: 138 * (*protosw[].pr_usrreq)(up, req, m, nam, opt); 139 * where up is a (struct socket *), req is one of these requests, 140 * m is an optional mbuf chain containing a message, 141 * nam is an optional mbuf chain containing an address, 142 * and opt is a pointer to a socketopt structure or nil. 143 * The protocol is responsible for disposal of the mbuf chain m, 144 * the caller is responsible for any space held by nam and opt. 145 * A non-zero return from usrreq gives an 146 * UNIX error number which should be passed to higher level software. 147 */ 148#define PRU_ATTACH 0 /* attach protocol to up */ 149#define PRU_DETACH 1 /* detach protocol from up */ 150#define PRU_BIND 2 /* bind socket to address */ 151#define PRU_LISTEN 3 /* listen for connection */ 152#define PRU_CONNECT 4 /* establish connection to peer */ 153#define PRU_ACCEPT 5 /* accept connection from peer */ 154#define PRU_DISCONNECT 6 /* disconnect from peer */ 155#define PRU_SHUTDOWN 7 /* won't send any more data */ 156#define PRU_RCVD 8 /* have taken data; more room now */ 157#define PRU_SEND 9 /* send this data */ 158#define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */ 159#define PRU_CONTROL 11 /* control operations on protocol */ 160#define PRU_SENSE 12 /* return status into m */ 161#define PRU_RCVOOB 13 /* retrieve out of band data */ 162#define PRU_SENDOOB 14 /* send out of band data */ 163#define PRU_SOCKADDR 15 /* fetch socket's address */ 164#define PRU_PEERADDR 16 /* fetch peer's address */ 165#define PRU_CONNECT2 17 /* connect two sockets */ 166/* begin for protocols internal use */ 167#define PRU_FASTTIMO 18 /* 200ms timeout */ 168#define PRU_SLOWTIMO 19 /* 500ms timeout */ 169#define PRU_PROTORCV 20 /* receive from below */ 170#define PRU_PROTOSEND 21 /* send to below */ 171/* end for protocol's internal use */ 172#define PRU_SEND_EOF 22 /* send and close */ 173#define PRU_NREQ 22 174 175#ifdef PRUREQUESTS 176const char *prurequests[] = { 177 "ATTACH", "DETACH", "BIND", "LISTEN", 178 "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN", 179 "RCVD", "SEND", "ABORT", "CONTROL", 180 "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR", 181 "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO", 182 "PROTORCV", "PROTOSEND", 183 "SEND_EOF", 184}; 185#endif 186 187#ifdef _KERNEL /* users shouldn't see this decl */ 188 189struct ifnet; 190struct stat; 191struct ucred; 192struct uio; 193 194/* 195 * If the ordering here looks odd, that's because it's alphabetical. These 196 * should eventually be merged back into struct protosw. 197 * 198 * Some fields initialized to defaults if they are NULL. 199 * See uipc_domain.c:net_init_domain() 200 */ 201struct pr_usrreqs { 202 double __Break_the_struct_layout_for_now; 203 void (*pru_abort)(struct socket *so); 204 int (*pru_accept)(struct socket *so, struct sockaddr **nam); 205 int (*pru_attach)(struct socket *so, int proto, struct thread *td); 206 int (*pru_bind)(struct socket *so, struct sockaddr *nam, 207 struct thread *td); 208 int (*pru_connect)(struct socket *so, struct sockaddr *nam, 209 struct thread *td); 210 int (*pru_connect2)(struct socket *so1, struct socket *so2); 211 int (*pru_control)(struct socket *so, u_long cmd, caddr_t data, 212 struct ifnet *ifp, struct thread *td); 213 void (*pru_detach)(struct socket *so); 214 int (*pru_disconnect)(struct socket *so); 215 int (*pru_listen)(struct socket *so, int backlog, 216 struct thread *td); 217 int (*pru_peeraddr)(struct socket *so, struct sockaddr **nam); 218 int (*pru_rcvd)(struct socket *so, int flags); 219 int (*pru_rcvoob)(struct socket *so, struct mbuf *m, int flags); 220 int (*pru_send)(struct socket *so, int flags, struct mbuf *m, 221 struct sockaddr *addr, struct mbuf *control, 222 struct thread *td); 223#define PRUS_OOB 0x1 224#define PRUS_EOF 0x2 225#define PRUS_MORETOCOME 0x4 226 int (*pru_sense)(struct socket *so, struct stat *sb); 227 int (*pru_shutdown)(struct socket *so); 228 int (*pru_sockaddr)(struct socket *so, struct sockaddr **nam); 229 230 /* 231 * These four added later, so they are out of order. They are used 232 * for shortcutting (fast path input/output) in some protocols. 233 * XXX - that's a lie, they are not implemented yet 234 * Rather than calling sosend() etc. directly, calls are made 235 * through these entry points. For protocols which still use 236 * the generic code, these just point to those routines. 237 */ 238 int (*pru_sosend)(struct socket *so, struct sockaddr *addr, 239 struct uio *uio, struct mbuf *top, struct mbuf *control, 240 int flags, struct thread *td); 241 int (*pru_soreceive)(struct socket *so, struct sockaddr **paddr, 242 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 243 int *flagsp); 244 int (*pru_sopoll)(struct socket *so, int events, 245 struct ucred *cred, struct thread *td); 246 void (*pru_sosetlabel)(struct socket *so); 247}; 248 249/* 250 * All nonvoid pru_*() functions below return EOPNOTSUPP. 251 */ 252 253void pru_abort_notsupp(struct socket *so); 254int pru_accept_notsupp(struct socket *so, struct sockaddr **nam); 255int pru_attach_notsupp(struct socket *so, int proto, struct thread *td); 256int pru_bind_notsupp(struct socket *so, struct sockaddr *nam, 257 struct thread *td); 258int pru_connect_notsupp(struct socket *so, struct sockaddr *nam, 259 struct thread *td); 260int pru_connect2_notsupp(struct socket *so1, struct socket *so2); 261int pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data, 262 struct ifnet *ifp, struct thread *td); 263void pru_detach_notsupp(struct socket *so); 264int pru_disconnect_notsupp(struct socket *so); 265int pru_listen_notsupp(struct socket *so, int backlog, struct thread *td); 266int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam); 267int pru_rcvd_notsupp(struct socket *so, int flags); 268int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags); 269int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m, 270 struct sockaddr *addr, struct mbuf *control, struct thread *td); 271int pru_sense_null(struct socket *so, struct stat *sb); 272int pru_shutdown_notsupp(struct socket *so); 273int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam); 274int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr, 275 struct uio *uio, struct mbuf *top, struct mbuf *control, int flags, 276 struct thread *td); 277int pru_soreceive_notsupp(struct socket *so, struct sockaddr **paddr, 278 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 279 int *flagsp); 280int pru_sopoll_notsupp(struct socket *so, int events, struct ucred *cred, 281 struct thread *td); 282void pru_sosetlabel_null(struct socket *so); 283 284#endif /* _KERNEL */ 285 286/* 287 * The arguments to the ctlinput routine are 288 * (*protosw[].pr_ctlinput)(cmd, sa, arg); 289 * where cmd is one of the commands below, sa is a pointer to a sockaddr, 290 * and arg is a `void *' argument used within a protocol family. 291 */ 292#define PRC_IFDOWN 0 /* interface transition */ 293#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */ 294#define PRC_IFUP 2 /* interface has come back up */ 295#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */ 296#define PRC_QUENCH 4 /* some one said to slow down */ 297#define PRC_MSGSIZE 5 /* message size forced drop */ 298#define PRC_HOSTDEAD 6 /* host appears to be down */ 299#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */ 300#define PRC_UNREACH_NET 8 /* no route to network */ 301#define PRC_UNREACH_HOST 9 /* no route to host */ 302#define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */ 303#define PRC_UNREACH_PORT 11 /* bad port # */ 304/* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */ 305#define PRC_UNREACH_SRCFAIL 13 /* source route failed */ 306#define PRC_REDIRECT_NET 14 /* net routing redirect */ 307#define PRC_REDIRECT_HOST 15 /* host routing redirect */ 308#define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */ 309#define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */ 310#define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */ 311#define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */ 312#define PRC_PARAMPROB 20 /* header incorrect */ 313#define PRC_UNREACH_ADMIN_PROHIB 21 /* packet administrativly prohibited */ 314 315#define PRC_NCMDS 22 316 317#define PRC_IS_REDIRECT(cmd) \ 318 ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST) 319 320#ifdef PRCREQUESTS 321char *prcrequests[] = { 322 "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2", 323 "QUENCH", "MSGSIZE", "HOSTDEAD", "#7", 324 "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH", 325 "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT", 326 "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS", 327 "PARAMPROB", "ADMIN-UNREACH" 328}; 329#endif 330 331/* 332 * The arguments to ctloutput are: 333 * (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p); 334 * req is one of the actions listed below, so is a (struct socket *), 335 * level is an indication of which protocol layer the option is intended. 336 * optname is a protocol dependent socket option request, 337 * optval is a pointer to a mbuf-chain pointer, for value-return results. 338 * The protocol is responsible for disposal of the mbuf chain *optval 339 * if supplied, 340 * the caller is responsible for any space held by *optval, when returned. 341 * A non-zero return from usrreq gives an 342 * UNIX error number which should be passed to higher level software. 343 */ 344#define PRCO_GETOPT 0 345#define PRCO_SETOPT 1 346 347#define PRCO_NCMDS 2 348 349#ifdef PRCOREQUESTS 350char *prcorequests[] = { 351 "GETOPT", "SETOPT", 352}; 353#endif 354 355#ifdef _KERNEL 356void pfctlinput(int, struct sockaddr *); 357void pfctlinput2(int, struct sockaddr *, void *); 358struct protosw *pffindproto(int family, int protocol, int type); 359struct protosw *pffindtype(int family, int type); 360int pf_proto_register(int family, struct protosw *npr); 361int pf_proto_unregister(int family, int protocol, int type); 362#endif 363 364#endif 365