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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 1.13 2004/06/07 07:01:36 dillon Exp $
38 #ifndef _SYS_PROTOSW_H_
39 #define _SYS_PROTOSW_H_
41 /* Forward declare these structures referenced from prototypes below. */
48 struct pr_output_info {
54 * Protocol switch table.
56 * Each protocol has a handle initializing one of these structures,
57 * which is used for protocol-protocol and system-protocol communication.
59 * A protocol is called through the pr_init entry before any other.
60 * Thereafter it is called every 200ms through the pr_fasttimo entry and
61 * every 500ms through the pr_slowtimo for timer based actions.
62 * The system will call the pr_drain entry if it is low on space and
63 * this should throw away any non-critical data.
65 * Protocols pass data between themselves as chains of mbufs using
66 * the pr_input and pr_output hooks. Pr_input passes data up (towards
67 * the users) and pr_output passes it down (towards the interfaces); control
68 * information passes up and down on pr_ctlinput and pr_ctloutput.
69 * The protocol is responsible for the space occupied by any the
70 * arguments to these entries and must dispose it.
72 * In retrospect, it would be a lot nicer to use an interface
73 * similar to the vnode VOP interface.
76 short pr_type; /* socket type used for */
77 const struct domain *pr_domain; /* domain protocol a member of */
78 short pr_protocol; /* protocol number */
79 short pr_flags; /* see below */
80 /* protocol-protocol hooks */
81 void (*pr_input) (struct mbuf *, ...);
82 /* input to protocol (from below) */
83 int (*pr_output) (struct mbuf *, struct socket *, ...);
84 /* output to protocol (from above) */
85 void (*pr_ctlinput)(int, struct sockaddr *, void *);
86 /* control input (from below) */
87 int (*pr_ctloutput)(struct socket *, struct sockopt *);
88 /* control output (from above) */
89 /* user-protocol hook */
90 struct lwkt_port *(*pr_mport)(struct socket *, struct sockaddr *, int);
92 void (*pr_init) (void); /* initialization hook */
93 void (*pr_fasttimo) (void);
94 /* fast timeout (200ms) */
95 void (*pr_slowtimo) (void);
96 /* slow timeout (500ms) */
97 void (*pr_drain) (void);
98 /* flush any excess space possible */
99 const struct pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
103 #define PR_SLOWHZ 2 /* 2 slow timeouts per second */
104 #define PR_FASTHZ 5 /* 5 fast timeouts per second */
107 * Values for pr_flags.
108 * PR_ADDR requires PR_ATOMIC;
109 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
110 * PR_IMPLOPCL means that the protocol allows sendto without prior connect,
111 * and the protocol understands the MSG_EOF flag. The first property is
112 * is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
115 #define PR_ATOMIC 0x01 /* exchange atomic messages only */
116 #define PR_ADDR 0x02 /* addresses given with messages */
117 #define PR_CONNREQUIRED 0x04 /* connection required by protocol */
118 #define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
119 #define PR_RIGHTS 0x10 /* passes capabilities */
120 #define PR_IMPLOPCL 0x20 /* implied open/close */
121 #define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */
124 * The arguments to usrreq are:
125 * (*protosw[].pr_usrreq)(up, req, m, nam, opt);
126 * where up is a (struct socket *), req is one of these requests,
127 * m is a optional mbuf chain containing a message,
128 * nam is an optional mbuf chain containing an address,
129 * and opt is a pointer to a socketopt structure or nil.
130 * The protocol is responsible for disposal of the mbuf chain m,
131 * the caller is responsible for any space held by nam and opt.
132 * A non-zero return from usrreq gives an
133 * UNIX error number which should be passed to higher level software.
135 #define PRU_ATTACH 0 /* attach protocol to up */
136 #define PRU_DETACH 1 /* detach protocol from up */
137 #define PRU_BIND 2 /* bind socket to address */
138 #define PRU_LISTEN 3 /* listen for connection */
139 #define PRU_CONNECT 4 /* establish connection to peer */
140 #define PRU_ACCEPT 5 /* accept connection from peer */
141 #define PRU_DISCONNECT 6 /* disconnect from peer */
142 #define PRU_SHUTDOWN 7 /* won't send any more data */
143 #define PRU_RCVD 8 /* have taken data; more room now */
144 #define PRU_SEND 9 /* send this data */
145 #define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */
146 #define PRU_CONTROL 11 /* control operations on protocol */
147 #define PRU_SENSE 12 /* return status into m */
148 #define PRU_RCVOOB 13 /* retrieve out of band data */
149 #define PRU_SENDOOB 14 /* send out of band data */
150 #define PRU_SOCKADDR 15 /* fetch socket's address */
151 #define PRU_PEERADDR 16 /* fetch peer's address */
152 #define PRU_CONNECT2 17 /* connect two sockets */
153 #define PRU_SOPOLL 18
154 /* begin for protocols internal use */
155 #define PRU_FASTTIMO 19 /* 200ms timeout */
156 #define PRU_SLOWTIMO 20 /* 500ms timeout */
157 #define PRU_PROTORCV 21 /* receive from below */
158 #define PRU_PROTOSEND 22 /* send to below */
159 /* end for protocol's internal use */
160 #define PRU_SEND_EOF 23 /* send and close */
165 char *prurequests[] = {
166 "ATTACH", "DETACH", "BIND", "LISTEN",
167 "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
168 "RCVD", "SEND", "ABORT", "CONTROL",
169 "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
170 "PEERADDR", "CONNECT2", "SOPOLL",
171 "FASTTIMO", "SLOWTIMO", "PROTORCV", "PROTOSEND",
172 "SEND_EOF", "PREDICATE"
176 #ifdef _KERNEL /* users shouldn't see this decl */
183 struct pru_attach_info {
184 struct rlimit *sb_rlimit;
185 struct ucred *p_ucred;
186 struct vnode *fd_rdir;
190 * If the ordering here looks odd, that's because it's alphabetical.
191 * Having this structure separated out from the main protoswitch is allegedly
192 * a big (12 cycles per call) lose on high-end CPUs. We will eventually
193 * migrate this stuff back into the main structure.
196 int (*pru_abort) (struct socket *so);
197 int (*pru_accept) (struct socket *so, struct sockaddr **nam);
198 int (*pru_attach) (struct socket *so, int proto,
199 struct pru_attach_info *ai);
200 int (*pru_bind) (struct socket *so, struct sockaddr *nam,
202 int (*pru_connect) (struct socket *so, struct sockaddr *nam,
204 int (*pru_connect2) (struct socket *so1, struct socket *so2);
205 int (*pru_control) (struct socket *so, u_long cmd, caddr_t data,
206 struct ifnet *ifp, struct thread *td);
207 int (*pru_detach) (struct socket *so);
208 int (*pru_disconnect) (struct socket *so);
209 int (*pru_listen) (struct socket *so, struct thread *td);
210 int (*pru_peeraddr) (struct socket *so,
211 struct sockaddr **nam);
212 int (*pru_rcvd) (struct socket *so, int flags);
213 int (*pru_rcvoob) (struct socket *so, struct mbuf *m,
215 int (*pru_send) (struct socket *so, int flags, struct mbuf *m,
216 struct sockaddr *addr, struct mbuf *control,
220 #define PRUS_MORETOCOME 0x4
221 int (*pru_sense) (struct socket *so, struct stat *sb);
222 int (*pru_shutdown) (struct socket *so);
223 int (*pru_sockaddr) (struct socket *so,
224 struct sockaddr **nam);
227 * These three added later, so they are out of order. They are used
228 * for shortcutting (fast path input/output) in some protocols.
229 * XXX - that's a lie, they are not implemented yet
230 * Rather than calling sosend() etc. directly, calls are made
231 * through these entry points. For protocols which still use
232 * the generic code, these just point to those routines.
234 int (*pru_sosend) (struct socket *so, struct sockaddr *addr,
235 struct uio *uio, struct mbuf *top,
236 struct mbuf *control, int flags,
238 int (*pru_soreceive) (struct socket *so,
239 struct sockaddr **paddr,
240 struct uio *uio, struct mbuf **mp0,
241 struct mbuf **controlp, int *flagsp);
242 int (*pru_sopoll) (struct socket *so, int events,
243 struct ucred *cred, struct thread *td);
246 typedef int (*pru_abort_fn_t) (struct socket *so);
247 typedef int (*pru_accept_fn_t) (struct socket *so, struct sockaddr **nam);
248 typedef int (*pru_attach_fn_t) (struct socket *so, int proto,
249 struct pru_attach_info *ai);
250 typedef int (*pru_bind_fn_t) (struct socket *so, struct sockaddr *nam,
252 typedef int (*pru_connect_fn_t) (struct socket *so, struct sockaddr *nam,
254 typedef int (*pru_connect2_fn_t) (struct socket *so1, struct socket *so2);
255 typedef int (*pru_control_fn_t) (struct socket *so, u_long cmd, caddr_t data,
258 typedef int (*pru_detach_fn_t) (struct socket *so);
259 typedef int (*pru_disconnect_fn_t) (struct socket *so);
260 typedef int (*pru_listen_fn_t) (struct socket *so, struct thread *td);
261 typedef int (*pru_peeraddr_fn_t) (struct socket *so, struct sockaddr **nam);
262 typedef int (*pru_rcvd_fn_t) (struct socket *so, int flags);
263 typedef int (*pru_rcvoob_fn_t) (struct socket *so, struct mbuf *m, int flags);
264 typedef int (*pru_send_fn_t) (struct socket *so, int flags, struct mbuf *m,
265 struct sockaddr *addr,
266 struct mbuf *control,
268 typedef int (*pru_sense_fn_t) (struct socket *so, struct stat *sb);
269 typedef int (*pru_shutdown_fn_t) (struct socket *so);
270 typedef int (*pru_sockaddr_fn_t) (struct socket *so, struct sockaddr **nam);
271 typedef int (*pru_sosend_fn_t) (struct socket *so, struct sockaddr *addr,
272 struct uio *uio, struct mbuf *top,
273 struct mbuf *control, int flags,
275 typedef int (*pru_soreceive_fn_t) (struct socket *so, struct sockaddr **paddr,
276 struct uio *uio, struct mbuf **mp0,
277 struct mbuf **controlp,
279 typedef int (*pru_sopoll_fn_t) (struct socket *so, int events,
283 int pru_accept_notsupp (struct socket *so, struct sockaddr **nam);
284 int pru_connect_notsupp (struct socket *so, struct sockaddr *nam,
286 int pru_connect2_notsupp (struct socket *so1, struct socket *so2);
287 int pru_control_notsupp (struct socket *so, u_long cmd, caddr_t data,
288 struct ifnet *ifp, struct thread *td);
289 int pru_listen_notsupp (struct socket *so, struct thread *td);
290 int pru_rcvd_notsupp (struct socket *so, int flags);
291 int pru_rcvoob_notsupp (struct socket *so, struct mbuf *m, int flags);
292 int pru_sense_null (struct socket *so, struct stat *sb);
294 struct lwkt_port *cpu0_soport(struct socket *, struct sockaddr *, int);
295 struct lwkt_port *sync_soport(struct socket *, struct sockaddr *, int);
300 * The arguments to the ctlinput routine are
301 * (*protosw[].pr_ctlinput)(cmd, sa, arg);
302 * where cmd is one of the commands below, sa is a pointer to a sockaddr,
303 * and arg is a `void *' argument used within a protocol family.
305 #define PRC_IFDOWN 0 /* interface transition */
306 #define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
307 #define PRC_IFUP 2 /* interface has come back up */
308 #define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
309 #define PRC_QUENCH 4 /* some one said to slow down */
310 #define PRC_MSGSIZE 5 /* message size forced drop */
311 #define PRC_HOSTDEAD 6 /* host appears to be down */
312 #define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */
313 #define PRC_UNREACH_NET 8 /* no route to network */
314 #define PRC_UNREACH_HOST 9 /* no route to host */
315 #define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */
316 #define PRC_UNREACH_PORT 11 /* bad port # */
317 /* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */
318 #define PRC_UNREACH_SRCFAIL 13 /* source route failed */
319 #define PRC_REDIRECT_NET 14 /* net routing redirect */
320 #define PRC_REDIRECT_HOST 15 /* host routing redirect */
321 #define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */
322 #define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */
323 #define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */
324 #define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */
325 #define PRC_PARAMPROB 20 /* header incorrect */
326 #define PRC_UNREACH_ADMIN_PROHIB 21 /* packet administrativly prohibited */
330 #define PRC_IS_REDIRECT(cmd) \
331 ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
334 char *prcrequests[] = {
335 "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
336 "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
337 "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
338 "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
339 "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
340 "PARAMPROB", "ADMIN-UNREACH"
345 * The arguments to ctloutput are:
346 * (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p);
347 * req is one of the actions listed below, so is a (struct socket *),
348 * level is an indication of which protocol layer the option is intended.
349 * optname is a protocol dependent socket option request,
350 * optval is a pointer to a mbuf-chain pointer, for value-return results.
351 * The protocol is responsible for disposal of the mbuf chain *optval
353 * the caller is responsible for any space held by *optval, when returned.
354 * A non-zero return from usrreq gives an
355 * UNIX error number which should be passed to higher level software.
357 #define PRCO_GETOPT 0
358 #define PRCO_SETOPT 1
363 char *prcorequests[] = {
369 void pfctlinput (int, struct sockaddr *);
370 void pfctlinput2 (int, struct sockaddr *, void *);
371 struct protosw *pffindproto (int family, int protocol, int type);
372 struct protosw *pffindtype (int family, int type);
375 #endif /* _SYS_PROTOSW_H_ */