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33 * @(#)protosw.h 8.1 (Berkeley) 6/2/93
34 * $FreeBSD: src/sys/sys/protosw.h,v 1.28.2.2 2001/07/03 11:02:01 ume Exp $
35 * $DragonFly: src/sys/sys/protosw.h,v 1.16 2006/05/20 02:42:13 dillon Exp $
38 #ifndef _SYS_PROTOSW_H_
39 #define _SYS_PROTOSW_H_
42 #include <sys/types.h>
45 /* Forward declare these structures referenced from prototypes below. */
52 struct pr_output_info {
58 * Protocol switch table.
60 * Each protocol has a handle initializing one of these structures,
61 * which is used for protocol-protocol and system-protocol communication.
63 * A protocol is called through the pr_init entry before any other.
64 * Thereafter it is called every 200ms through the pr_fasttimo entry and
65 * every 500ms through the pr_slowtimo for timer based actions.
66 * The system will call the pr_drain entry if it is low on space and
67 * this should throw away any non-critical data.
69 * Protocols pass data between themselves as chains of mbufs using
70 * the pr_input and pr_output hooks. Pr_input passes data up (towards
71 * the users) and pr_output passes it down (towards the interfaces); control
72 * information passes up and down on pr_ctlinput and pr_ctloutput.
73 * The protocol is responsible for the space occupied by any the
74 * arguments to these entries and must dispose it.
76 * In retrospect, it would be a lot nicer to use an interface
77 * similar to the vnode VOP interface.
80 short pr_type; /* socket type used for */
81 const struct domain *pr_domain; /* domain protocol a member of */
82 short pr_protocol; /* protocol number */
83 short pr_flags; /* see below */
84 /* protocol-protocol hooks */
85 void (*pr_input) (struct mbuf *, ...);
86 /* input to protocol (from below) */
87 int (*pr_output) (struct mbuf *, struct socket *, ...);
88 /* output to protocol (from above) */
89 void (*pr_ctlinput)(int, struct sockaddr *, void *);
90 /* control input (from below) */
91 int (*pr_ctloutput)(struct socket *, struct sockopt *);
92 /* control output (from above) */
93 /* user-protocol hook */
94 struct lwkt_port *(*pr_mport)(struct socket *, struct sockaddr *, int);
96 void (*pr_init) (void); /* initialization hook */
97 void (*pr_fasttimo) (void);
98 /* fast timeout (200ms) */
99 void (*pr_slowtimo) (void);
100 /* slow timeout (500ms) */
101 void (*pr_drain) (void);
102 /* flush any excess space possible */
103 const struct pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
107 #define PR_SLOWHZ 2 /* 2 slow timeouts per second */
108 #define PR_FASTHZ 5 /* 5 fast timeouts per second */
111 * Values for pr_flags.
112 * PR_ADDR requires PR_ATOMIC;
113 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
114 * PR_IMPLOPCL means that the protocol allows sendto without prior connect,
115 * and the protocol understands the MSG_EOF flag. The first property is
116 * is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
119 #define PR_ATOMIC 0x01 /* exchange atomic messages only */
120 #define PR_ADDR 0x02 /* addresses given with messages */
121 #define PR_CONNREQUIRED 0x04 /* connection required by protocol */
122 #define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
123 #define PR_RIGHTS 0x10 /* passes capabilities */
124 #define PR_IMPLOPCL 0x20 /* implied open/close */
125 #define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */
126 #define PR_ADDR_OPT 0x80 /* allow addresses during delivery */
129 * The arguments to usrreq are:
130 * (*protosw[].pr_usrreq)(up, req, m, nam, opt);
131 * where up is a (struct socket *), req is one of these requests,
132 * m is a optional mbuf chain containing a message,
133 * nam is an optional mbuf chain containing an address,
134 * and opt is a pointer to a socketopt structure or nil.
135 * The protocol is responsible for disposal of the mbuf chain m,
136 * the caller is responsible for any space held by nam and opt.
137 * A non-zero return from usrreq gives an
138 * UNIX error number which should be passed to higher level software.
140 #define PRU_ATTACH 0 /* attach protocol to up */
141 #define PRU_DETACH 1 /* detach protocol from up */
142 #define PRU_BIND 2 /* bind socket to address */
143 #define PRU_LISTEN 3 /* listen for connection */
144 #define PRU_CONNECT 4 /* establish connection to peer */
145 #define PRU_ACCEPT 5 /* accept connection from peer */
146 #define PRU_DISCONNECT 6 /* disconnect from peer */
147 #define PRU_SHUTDOWN 7 /* won't send any more data */
148 #define PRU_RCVD 8 /* have taken data; more room now */
149 #define PRU_SEND 9 /* send this data */
150 #define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */
151 #define PRU_CONTROL 11 /* control operations on protocol */
152 #define PRU_SENSE 12 /* return status into m */
153 #define PRU_RCVOOB 13 /* retrieve out of band data */
154 #define PRU_SENDOOB 14 /* send out of band data */
155 #define PRU_SOCKADDR 15 /* fetch socket's address */
156 #define PRU_PEERADDR 16 /* fetch peer's address */
157 #define PRU_CONNECT2 17 /* connect two sockets */
158 #define PRU_SOPOLL 18
159 /* begin for protocols internal use */
160 #define PRU_FASTTIMO 19 /* 200ms timeout */
161 #define PRU_SLOWTIMO 20 /* 500ms timeout */
162 #define PRU_PROTORCV 21 /* receive from below */
163 #define PRU_PROTOSEND 22 /* send to below */
164 /* end for protocol's internal use */
165 #define PRU_SEND_EOF 23 /* send and close */
170 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", "SOPOLL",
176 "FASTTIMO", "SLOWTIMO", "PROTORCV", "PROTOSEND",
177 "SEND_EOF", "PREDICATE"
181 #ifdef _KERNEL /* users shouldn't see this decl */
188 struct pru_attach_info {
189 struct rlimit *sb_rlimit;
190 struct ucred *p_ucred;
191 struct vnode *fd_rdir;
195 * If the ordering here looks odd, that's because it's alphabetical.
196 * Having this structure separated out from the main protoswitch is allegedly
197 * a big (12 cycles per call) lose on high-end CPUs. We will eventually
198 * migrate this stuff back into the main structure.
201 int (*pru_abort) (struct socket *so);
202 int (*pru_accept) (struct socket *so, struct sockaddr **nam);
203 int (*pru_attach) (struct socket *so, int proto,
204 struct pru_attach_info *ai);
205 int (*pru_bind) (struct socket *so, struct sockaddr *nam,
207 int (*pru_connect) (struct socket *so, struct sockaddr *nam,
209 int (*pru_connect2) (struct socket *so1, struct socket *so2);
210 int (*pru_control) (struct socket *so, u_long cmd, caddr_t data,
211 struct ifnet *ifp, struct thread *td);
212 int (*pru_detach) (struct socket *so);
213 int (*pru_disconnect) (struct socket *so);
214 int (*pru_listen) (struct socket *so, struct thread *td);
215 int (*pru_peeraddr) (struct socket *so,
216 struct sockaddr **nam);
217 int (*pru_rcvd) (struct socket *so, int flags);
218 int (*pru_rcvoob) (struct socket *so, struct mbuf *m,
220 int (*pru_send) (struct socket *so, int flags, struct mbuf *m,
221 struct sockaddr *addr, struct mbuf *control,
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,
229 struct sockaddr **nam);
232 * These three added later, so they are out of order. They are used
233 * for shortcutting (fast path input/output) in some protocols.
234 * XXX - that's a lie, they are not implemented yet
235 * Rather than calling sosend() etc. directly, calls are made
236 * through these entry points. For protocols which still use
237 * the generic code, these just point to those routines.
239 int (*pru_sosend) (struct socket *so, struct sockaddr *addr,
240 struct uio *uio, struct mbuf *top,
241 struct mbuf *control, int flags,
243 int (*pru_soreceive) (struct socket *so,
244 struct sockaddr **paddr,
245 struct uio *uio, struct mbuf **mp0,
246 struct mbuf **controlp, int *flagsp);
247 int (*pru_sopoll) (struct socket *so, int events,
248 struct ucred *cred, struct thread *td);
251 typedef int (*pru_abort_fn_t) (struct socket *so);
252 typedef int (*pru_accept_fn_t) (struct socket *so, struct sockaddr **nam);
253 typedef int (*pru_attach_fn_t) (struct socket *so, int proto,
254 struct pru_attach_info *ai);
255 typedef int (*pru_bind_fn_t) (struct socket *so, struct sockaddr *nam,
257 typedef int (*pru_connect_fn_t) (struct socket *so, struct sockaddr *nam,
259 typedef int (*pru_connect2_fn_t) (struct socket *so1, struct socket *so2);
260 typedef int (*pru_control_fn_t) (struct socket *so, u_long cmd, caddr_t data,
263 typedef int (*pru_detach_fn_t) (struct socket *so);
264 typedef int (*pru_disconnect_fn_t) (struct socket *so);
265 typedef int (*pru_listen_fn_t) (struct socket *so, struct thread *td);
266 typedef int (*pru_peeraddr_fn_t) (struct socket *so, struct sockaddr **nam);
267 typedef int (*pru_rcvd_fn_t) (struct socket *so, int flags);
268 typedef int (*pru_rcvoob_fn_t) (struct socket *so, struct mbuf *m, int flags);
269 typedef int (*pru_send_fn_t) (struct socket *so, int flags, struct mbuf *m,
270 struct sockaddr *addr,
271 struct mbuf *control,
273 typedef int (*pru_sense_fn_t) (struct socket *so, struct stat *sb);
274 typedef int (*pru_shutdown_fn_t) (struct socket *so);
275 typedef int (*pru_sockaddr_fn_t) (struct socket *so, struct sockaddr **nam);
276 typedef int (*pru_sosend_fn_t) (struct socket *so, struct sockaddr *addr,
277 struct uio *uio, struct mbuf *top,
278 struct mbuf *control, int flags,
280 typedef int (*pru_soreceive_fn_t) (struct socket *so, struct sockaddr **paddr,
281 struct uio *uio, struct mbuf **mp0,
282 struct mbuf **controlp,
284 typedef int (*pru_sopoll_fn_t) (struct socket *so, int events,
288 int pru_accept_notsupp (struct socket *so, struct sockaddr **nam);
289 int pru_connect_notsupp (struct socket *so, struct sockaddr *nam,
291 int pru_connect2_notsupp (struct socket *so1, struct socket *so2);
292 int pru_control_notsupp (struct socket *so, u_long cmd, caddr_t data,
293 struct ifnet *ifp, struct thread *td);
294 int pru_listen_notsupp (struct socket *so, struct thread *td);
295 int pru_rcvd_notsupp (struct socket *so, int flags);
296 int pru_rcvoob_notsupp (struct socket *so, struct mbuf *m, int flags);
297 int pru_sense_null (struct socket *so, struct stat *sb);
299 struct lwkt_port *cpu0_soport(struct socket *, struct sockaddr *, int);
300 struct lwkt_port *sync_soport(struct socket *, struct sockaddr *, int);
305 * The arguments to the ctlinput routine are
306 * (*protosw[].pr_ctlinput)(cmd, sa, arg);
307 * where cmd is one of the commands below, sa is a pointer to a sockaddr,
308 * and arg is a `void *' argument used within a protocol family.
310 #define PRC_IFDOWN 0 /* interface transition */
311 #define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
312 #define PRC_IFUP 2 /* interface has come back up */
313 #define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
314 #define PRC_QUENCH 4 /* some one said to slow down */
315 #define PRC_MSGSIZE 5 /* message size forced drop */
316 #define PRC_HOSTDEAD 6 /* host appears to be down */
317 #define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */
318 #define PRC_UNREACH_NET 8 /* no route to network */
319 #define PRC_UNREACH_HOST 9 /* no route to host */
320 #define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */
321 #define PRC_UNREACH_PORT 11 /* bad port # */
322 /* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */
323 #define PRC_UNREACH_SRCFAIL 13 /* source route failed */
324 #define PRC_REDIRECT_NET 14 /* net routing redirect */
325 #define PRC_REDIRECT_HOST 15 /* host routing redirect */
326 #define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */
327 #define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */
328 #define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */
329 #define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */
330 #define PRC_PARAMPROB 20 /* header incorrect */
331 #define PRC_UNREACH_ADMIN_PROHIB 21 /* packet administrativly prohibited */
335 #define PRC_IS_REDIRECT(cmd) \
336 ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
339 char *prcrequests[] = {
340 "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
341 "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
342 "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
343 "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
344 "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
345 "PARAMPROB", "ADMIN-UNREACH"
350 * The arguments to ctloutput are:
351 * (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p);
352 * req is one of the actions listed below, so is a (struct socket *),
353 * level is an indication of which protocol layer the option is intended.
354 * optname is a protocol dependent socket option request,
355 * optval is a pointer to a mbuf-chain pointer, for value-return results.
356 * The protocol is responsible for disposal of the mbuf chain *optval
358 * the caller is responsible for any space held by *optval, when returned.
359 * A non-zero return from usrreq gives an
360 * UNIX error number which should be passed to higher level software.
362 #define PRCO_GETOPT 0
363 #define PRCO_SETOPT 1
368 char *prcorequests[] = {
374 void pfctlinput (int, struct sockaddr *);
375 void pfctlinput2 (int, struct sockaddr *, void *);
376 struct protosw *pffindproto (int family, int protocol, int type);
377 struct protosw *pffindtype (int family, int type);
380 #endif /* _SYS_PROTOSW_H_ */