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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 1.8 2004/03/06 05:20:31 hsu 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 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 *, int);
82 /* input to protocol (from below) */
83 int (*pr_output) (struct mbuf *, struct socket *,
84 struct pr_output_info *);
85 /* output to protocol (from above) */
86 void (*pr_ctlinput)(int, struct sockaddr *, void *);
87 /* control input (from below) */
88 int (*pr_ctloutput)(struct socket *, struct sockopt *);
89 /* control output (from above) */
90 /* user-protocol hook */
91 struct lwkt_port *(*pr_mport)(struct socket *, struct sockaddr *);
93 void (*pr_init) (void); /* initialization hook */
94 void (*pr_fasttimo) (void);
95 /* fast timeout (200ms) */
96 void (*pr_slowtimo) (void);
97 /* slow timeout (500ms) */
98 void (*pr_drain) (void);
99 /* flush any excess space possible */
100 struct pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
104 #define PR_SLOWHZ 2 /* 2 slow timeouts per second */
105 #define PR_FASTHZ 5 /* 5 fast timeouts per second */
108 * Values for pr_flags.
109 * PR_ADDR requires PR_ATOMIC;
110 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
111 * PR_IMPLOPCL means that the protocol allows sendto without prior connect,
112 * and the protocol understands the MSG_EOF flag. The first property is
113 * is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
116 #define PR_ATOMIC 0x01 /* exchange atomic messages only */
117 #define PR_ADDR 0x02 /* addresses given with messages */
118 #define PR_CONNREQUIRED 0x04 /* connection required by protocol */
119 #define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
120 #define PR_RIGHTS 0x10 /* passes capabilities */
121 #define PR_IMPLOPCL 0x20 /* implied open/close */
122 #define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */
125 * The arguments to usrreq are:
126 * (*protosw[].pr_usrreq)(up, req, m, nam, opt);
127 * where up is a (struct socket *), req is one of these requests,
128 * m is a optional mbuf chain containing a message,
129 * nam is an optional mbuf chain containing an address,
130 * and opt is a pointer to a socketopt structure or nil.
131 * The protocol is responsible for disposal of the mbuf chain m,
132 * the caller is responsible for any space held by nam and opt.
133 * A non-zero return from usrreq gives an
134 * UNIX error number which should be passed to higher level software.
136 #define PRU_ATTACH 0 /* attach protocol to up */
137 #define PRU_DETACH 1 /* detach protocol from up */
138 #define PRU_BIND 2 /* bind socket to address */
139 #define PRU_LISTEN 3 /* listen for connection */
140 #define PRU_CONNECT 4 /* establish connection to peer */
141 #define PRU_ACCEPT 5 /* accept connection from peer */
142 #define PRU_DISCONNECT 6 /* disconnect from peer */
143 #define PRU_SHUTDOWN 7 /* won't send any more data */
144 #define PRU_RCVD 8 /* have taken data; more room now */
145 #define PRU_SEND 9 /* send this data */
146 #define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */
147 #define PRU_CONTROL 11 /* control operations on protocol */
148 #define PRU_SENSE 12 /* return status into m */
149 #define PRU_RCVOOB 13 /* retrieve out of band data */
150 #define PRU_SENDOOB 14 /* send out of band data */
151 #define PRU_SOCKADDR 15 /* fetch socket's address */
152 #define PRU_PEERADDR 16 /* fetch peer's address */
153 #define PRU_CONNECT2 17 /* connect two sockets */
154 /* begin for protocols internal use */
155 #define PRU_FASTTIMO 18 /* 200ms timeout */
156 #define PRU_SLOWTIMO 19 /* 500ms timeout */
157 #define PRU_PROTORCV 20 /* receive from below */
158 #define PRU_PROTOSEND 21 /* send to below */
159 /* end for protocol's internal use */
160 #define PRU_SEND_EOF 22 /* send and close */
164 char *prurequests[] = {
165 "ATTACH", "DETACH", "BIND", "LISTEN",
166 "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
167 "RCVD", "SEND", "ABORT", "CONTROL",
168 "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
169 "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
170 "PROTORCV", "PROTOSEND",
175 #ifdef _KERNEL /* users shouldn't see this decl */
182 struct pru_attach_info {
183 struct rlimit *sb_rlimit;
184 struct ucred *p_ucred;
185 struct vnode *fd_rdir;
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.
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,
198 struct pru_attach_info *ai);
199 int (*pru_bind) (struct socket *so, struct sockaddr *nam,
201 int (*pru_connect) (struct socket *so, struct sockaddr *nam,
203 int (*pru_connect2) (struct socket *so1, struct socket *so2);
204 int (*pru_control) (struct socket *so, u_long cmd, caddr_t data,
205 struct ifnet *ifp, struct thread *td);
206 int (*pru_detach) (struct socket *so);
207 int (*pru_disconnect) (struct socket *so);
208 int (*pru_listen) (struct socket *so, struct thread *td);
209 int (*pru_peeraddr) (struct socket *so,
210 struct sockaddr **nam);
211 int (*pru_rcvd) (struct socket *so, int flags);
212 int (*pru_rcvoob) (struct socket *so, struct mbuf *m,
214 int (*pru_send) (struct socket *so, int flags, struct mbuf *m,
215 struct sockaddr *addr, struct mbuf *control,
219 #define PRUS_MORETOCOME 0x4
220 int (*pru_sense) (struct socket *so, struct stat *sb);
221 int (*pru_shutdown) (struct socket *so);
222 int (*pru_sockaddr) (struct socket *so,
223 struct sockaddr **nam);
226 * These three added later, so they are out of order. They are used
227 * for shortcutting (fast path input/output) in some protocols.
228 * XXX - that's a lie, they are not implemented yet
229 * Rather than calling sosend() etc. directly, calls are made
230 * through these entry points. For protocols which still use
231 * the generic code, these just point to those routines.
233 int (*pru_sosend) (struct socket *so, struct sockaddr *addr,
234 struct uio *uio, struct mbuf *top,
235 struct mbuf *control, int flags,
237 int (*pru_soreceive) (struct socket *so,
238 struct sockaddr **paddr,
239 struct uio *uio, struct mbuf **mp0,
240 struct mbuf **controlp, int *flagsp);
241 int (*pru_sopoll) (struct socket *so, int events,
242 struct ucred *cred, struct thread *td);
245 typedef int (*pru_abort_fn_t) (struct socket *so);
246 typedef int (*pru_accept_fn_t) (struct socket *so, struct sockaddr **nam);
247 typedef int (*pru_attach_fn_t) (struct socket *so, int proto,
248 struct pru_attach_info *ai);
249 typedef int (*pru_bind_fn_t) (struct socket *so, struct sockaddr *nam,
251 typedef int (*pru_connect_fn_t) (struct socket *so, struct sockaddr *nam,
253 typedef int (*pru_connect2_fn_t) (struct socket *so1, struct socket *so2);
254 typedef int (*pru_control_fn_t) (struct socket *so, u_long cmd, caddr_t data,
257 typedef int (*pru_detach_fn_t) (struct socket *so);
258 typedef int (*pru_disconnect_fn_t) (struct socket *so);
259 typedef int (*pru_listen_fn_t) (struct socket *so, struct thread *td);
260 typedef int (*pru_peeraddr_fn_t) (struct socket *so, struct sockaddr **nam);
261 typedef int (*pru_rcvd_fn_t) (struct socket *so, int flags);
262 typedef int (*pru_rcvoob_fn_t) (struct socket *so, struct mbuf *m, int flags);
263 typedef int (*pru_send_fn_t) (struct socket *so, int flags, struct mbuf *m,
264 struct sockaddr *addr,
265 struct mbuf *control,
267 typedef int (*pru_sense_fn_t) (struct socket *so, struct stat *sb);
268 typedef int (*pru_shutdown_fn_t) (struct socket *so);
269 typedef int (*pru_sockaddr_fn_t) (struct socket *so, struct sockaddr **nam);
270 typedef int (*pru_sosend_fn_t) (struct socket *so, struct sockaddr *addr,
271 struct uio *uio, struct mbuf *top,
272 struct mbuf *control, int flags,
274 typedef int (*pru_soreceive_fn_t) (struct socket *so, struct sockaddr **paddr,
275 struct uio *uio, struct mbuf **mp0,
276 struct mbuf **controlp,
278 typedef int (*pru_sopoll_fn_t) (struct socket *so, int events,
282 int pru_accept_notsupp (struct socket *so, struct sockaddr **nam);
283 int pru_connect_notsupp (struct socket *so, struct sockaddr *nam,
285 int pru_connect2_notsupp (struct socket *so1, struct socket *so2);
286 int pru_control_notsupp (struct socket *so, u_long cmd, caddr_t data,
287 struct ifnet *ifp, struct thread *td);
288 int pru_listen_notsupp (struct socket *so, struct thread *td);
289 int pru_rcvd_notsupp (struct socket *so, int flags);
290 int pru_rcvoob_notsupp (struct socket *so, struct mbuf *m, int flags);
291 int pru_sense_null (struct socket *so, struct stat *sb);
293 struct lwkt_port *cpu0_soport(struct socket *, struct sockaddr *);
298 * The arguments to the ctlinput routine are
299 * (*protosw[].pr_ctlinput)(cmd, sa, arg);
300 * where cmd is one of the commands below, sa is a pointer to a sockaddr,
301 * and arg is a `void *' argument used within a protocol family.
303 #define PRC_IFDOWN 0 /* interface transition */
304 #define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
305 #define PRC_IFUP 2 /* interface has come back up */
306 #define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
307 #define PRC_QUENCH 4 /* some one said to slow down */
308 #define PRC_MSGSIZE 5 /* message size forced drop */
309 #define PRC_HOSTDEAD 6 /* host appears to be down */
310 #define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */
311 #define PRC_UNREACH_NET 8 /* no route to network */
312 #define PRC_UNREACH_HOST 9 /* no route to host */
313 #define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */
314 #define PRC_UNREACH_PORT 11 /* bad port # */
315 /* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */
316 #define PRC_UNREACH_SRCFAIL 13 /* source route failed */
317 #define PRC_REDIRECT_NET 14 /* net routing redirect */
318 #define PRC_REDIRECT_HOST 15 /* host routing redirect */
319 #define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */
320 #define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */
321 #define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */
322 #define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */
323 #define PRC_PARAMPROB 20 /* header incorrect */
324 #define PRC_UNREACH_ADMIN_PROHIB 21 /* packet administrativly prohibited */
328 #define PRC_IS_REDIRECT(cmd) \
329 ((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
332 char *prcrequests[] = {
333 "IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
334 "QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
335 "NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
336 "#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
337 "TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
338 "PARAMPROB", "ADMIN-UNREACH"
343 * The arguments to ctloutput are:
344 * (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p);
345 * req is one of the actions listed below, so is a (struct socket *),
346 * level is an indication of which protocol layer the option is intended.
347 * optname is a protocol dependent socket option request,
348 * optval is a pointer to a mbuf-chain pointer, for value-return results.
349 * The protocol is responsible for disposal of the mbuf chain *optval
351 * the caller is responsible for any space held by *optval, when returned.
352 * A non-zero return from usrreq gives an
353 * UNIX error number which should be passed to higher level software.
355 #define PRCO_GETOPT 0
356 #define PRCO_SETOPT 1
361 char *prcorequests[] = {
367 void pfctlinput (int, struct sockaddr *);
368 void pfctlinput2 (int, struct sockaddr *, void *);
369 struct protosw *pffindproto (int family, int protocol, int type);
370 struct protosw *pffindtype (int family, int type);
373 #endif /* _SYS_PROTOSW_H_ */