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31 * @(#)protosw.h 8.1 (Berkeley) 6/2/93
35 #ifndef _SYS_PROTOSW_H_
36 #define _SYS_PROTOSW_H_
38 #include <sys/queue.h>
40 /* Forward declare these structures referenced from prototypes below. */
50 * Protocol switch table.
52 * Each protocol has a handle initializing one of these structures,
53 * which is used for protocol-protocol and system-protocol communication.
55 * Thereafter it is called every 200ms through the pr_fasttimo entry and
56 * every 500ms through the pr_slowtimo for timer based actions.
57 * The system will call the pr_drain entry if it is low on space and
58 * this should throw away any non-critical data.
60 * In retrospect, it would be a lot nicer to use an interface
61 * similar to the vnode VOP interface.
68 /* USE THESE FOR YOUR PROTOTYPES ! */
69 typedef int pr_input_t(struct mbuf **, int*, int);
70 typedef void pr_ctlinput_t(int, struct sockaddr *, void *);
71 typedef int pr_ctloutput_t(struct socket *, struct sockopt *);
72 typedef void pr_fasttimo_t(void);
73 typedef void pr_slowtimo_t(void);
74 typedef void pr_drain_t(void);
75 typedef void pr_abort_t(struct socket *);
76 typedef int pr_accept_t(struct socket *, struct sockaddr **);
77 typedef int pr_attach_t(struct socket *, int, struct thread *);
78 typedef int pr_bind_t(struct socket *, struct sockaddr *, struct thread *);
79 typedef int pr_connect_t(struct socket *, struct sockaddr *,
81 typedef int pr_connect2_t(struct socket *, struct socket *);
82 typedef int pr_control_t(struct socket *, unsigned long, void *,
83 struct ifnet *, struct thread *);
84 typedef void pr_detach_t(struct socket *);
85 typedef int pr_disconnect_t(struct socket *);
86 typedef int pr_listen_t(struct socket *, int, struct thread *);
87 typedef int pr_peeraddr_t(struct socket *, struct sockaddr **);
88 typedef int pr_rcvd_t(struct socket *, int);
89 typedef int pr_rcvoob_t(struct socket *, struct mbuf *, int);
93 PRUS_MORETOCOME = 0x4,
97 typedef int pr_send_t(struct socket *, int, struct mbuf *,
98 struct sockaddr *, struct mbuf *, struct thread *);
99 typedef int pr_ready_t(struct socket *, struct mbuf *, int);
100 typedef int pr_sense_t(struct socket *, struct stat *);
101 typedef int pr_shutdown_t(struct socket *);
102 typedef int pr_flush_t(struct socket *, int);
103 typedef int pr_sockaddr_t(struct socket *, struct sockaddr **);
104 typedef int pr_sosend_t(struct socket *, struct sockaddr *, struct uio *,
105 struct mbuf *, struct mbuf *, int, struct thread *);
106 typedef int pr_soreceive_t(struct socket *, struct sockaddr **,
107 struct uio *, struct mbuf **, struct mbuf **, int *);
108 typedef int pr_sopoll_t(struct socket *, int, struct ucred *,
110 typedef void pr_sosetlabel_t(struct socket *);
111 typedef void pr_close_t(struct socket *);
112 typedef int pr_bindat_t(int, struct socket *, struct sockaddr *,
114 typedef int pr_connectat_t(int, struct socket *, struct sockaddr *,
116 typedef int pr_aio_queue_t(struct socket *, struct kaiocb *);
119 short pr_type; /* socket type used for */
120 struct domain *pr_domain; /* domain protocol a member of */
121 short pr_protocol; /* protocol number */
122 short pr_flags; /* see below */
123 /* protocol-protocol hooks */
124 pr_input_t *pr_input; /* input to protocol (from below) */
125 pr_ctlinput_t *pr_ctlinput; /* control input (from below) */
126 pr_ctloutput_t *pr_ctloutput; /* control output (from above) */
128 pr_fasttimo_t *pr_fasttimo; /* fast timeout (200ms) */
129 pr_slowtimo_t *pr_slowtimo; /* slow timeout (500ms) */
130 pr_drain_t *pr_drain; /* flush any excess space possible */
132 struct pr_usrreqs *pr_usrreqs; /* user-protocol hook */
133 LIST_ENTRY(protosw) pr_fasttimos;
134 LIST_ENTRY(protosw) pr_slowtimos;
138 #define PR_SLOWHZ 2 /* 2 slow timeouts per second */
139 #define PR_FASTHZ 5 /* 5 fast timeouts per second */
142 * This number should be defined again within each protocol family to avoid
145 #define PROTO_SPACER 32767 /* spacer for loadable protocols */
148 * Values for pr_flags.
149 * PR_ADDR requires PR_ATOMIC;
150 * PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
151 * PR_IMPLOPCL means that the protocol allows sendto without prior connect,
152 * and the protocol understands the MSG_EOF flag. The first property is
153 * is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
155 * PR_SOCKBUF requires protocol to initialize and destroy its socket buffers
156 * in its pr_attach and pr_detach.
158 #define PR_ATOMIC 0x01 /* exchange atomic messages only */
159 #define PR_ADDR 0x02 /* addresses given with messages */
160 #define PR_CONNREQUIRED 0x04 /* connection required by protocol */
161 #define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
162 #define PR_RIGHTS 0x10 /* passes capabilities */
163 #define PR_IMPLOPCL 0x20 /* implied open/close */
164 #define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */
165 #define PR_CAPATTACH 0x80 /* socket can attach in cap mode */
166 #define PR_SOCKBUF 0x100 /* private implementation of buffers */
169 * In earlier BSD network stacks, a single pr_usrreq() function pointer was
170 * invoked with an operation number indicating what operation was desired.
171 * We now provide individual function pointers which protocols can implement,
172 * which offers a number of benefits (such as type checking for arguments).
173 * These older constants are still present in order to support TCP debugging.
175 #define PRU_ATTACH 0 /* attach protocol to up */
176 #define PRU_DETACH 1 /* detach protocol from up */
177 #define PRU_BIND 2 /* bind socket to address */
178 #define PRU_LISTEN 3 /* listen for connection */
179 #define PRU_CONNECT 4 /* establish connection to peer */
180 #define PRU_ACCEPT 5 /* accept connection from peer */
181 #define PRU_DISCONNECT 6 /* disconnect from peer */
182 #define PRU_SHUTDOWN 7 /* won't send any more data */
183 #define PRU_RCVD 8 /* have taken data; more room now */
184 #define PRU_SEND 9 /* send this data */
185 #define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */
186 #define PRU_CONTROL 11 /* control operations on protocol */
187 #define PRU_SENSE 12 /* return status into m */
188 #define PRU_RCVOOB 13 /* retrieve out of band data */
189 #define PRU_SENDOOB 14 /* send out of band data */
190 #define PRU_SOCKADDR 15 /* fetch socket's address */
191 #define PRU_PEERADDR 16 /* fetch peer's address */
192 #define PRU_CONNECT2 17 /* connect two sockets */
193 /* begin for protocols internal use */
194 #define PRU_FASTTIMO 18 /* 200ms timeout */
195 #define PRU_SLOWTIMO 19 /* 500ms timeout */
196 #define PRU_PROTORCV 20 /* receive from below */
197 #define PRU_PROTOSEND 21 /* send to below */
198 /* end for protocol's internal use */
199 #define PRU_SEND_EOF 22 /* send and close */
200 #define PRU_SOSETLABEL 23 /* MAC label change */
201 #define PRU_CLOSE 24 /* socket close */
202 #define PRU_FLUSH 25 /* flush the socket */
206 const char *prurequests[] = {
207 "ATTACH", "DETACH", "BIND", "LISTEN",
208 "CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
209 "RCVD", "SEND", "ABORT", "CONTROL",
210 "SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
211 "PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
212 "PROTORCV", "PROTOSEND", "SEND_EOF", "SOSETLABEL",
217 #ifdef _KERNEL /* users shouldn't see this decl */
225 * If the ordering here looks odd, that's because it's alphabetical. These
226 * should eventually be merged back into struct protosw.
228 * Some fields initialized to defaults if they are NULL.
231 pr_abort_t *pru_abort;
232 pr_accept_t *pru_accept;
233 pr_attach_t *pru_attach;
235 pr_connect_t *pru_connect;
236 pr_connect2_t *pru_connect2;
237 pr_control_t *pru_control;
238 pr_detach_t *pru_detach;
239 pr_disconnect_t *pru_disconnect;
240 pr_listen_t *pru_listen;
241 pr_peeraddr_t *pru_peeraddr;
243 pr_rcvoob_t *pru_rcvoob;
245 pr_ready_t *pru_ready;
246 pr_sense_t *pru_sense;
247 pr_shutdown_t *pru_shutdown;
248 pr_flush_t *pru_flush;
249 pr_sockaddr_t *pru_sockaddr;
250 pr_sosend_t *pru_sosend;
251 pr_soreceive_t *pru_soreceive;
252 pr_sopoll_t *pru_sopoll;
253 pr_sosetlabel_t *pru_sosetlabel;
254 pr_close_t *pru_close;
255 pr_bindat_t *pru_bindat;
256 pr_connectat_t *pru_connectat;
257 pr_aio_queue_t *pru_aio_queue;
261 * All nonvoid pru_*() functions below return EOPNOTSUPP.
263 int pru_accept_notsupp(struct socket *so, struct sockaddr **nam);
264 int pru_aio_queue_notsupp(struct socket *so, struct kaiocb *job);
265 int pru_attach_notsupp(struct socket *so, int proto, struct thread *td);
266 int pru_bind_notsupp(struct socket *so, struct sockaddr *nam,
268 int pru_bindat_notsupp(int fd, struct socket *so, struct sockaddr *nam,
270 int pru_connect_notsupp(struct socket *so, struct sockaddr *nam,
272 int pru_connectat_notsupp(int fd, struct socket *so, struct sockaddr *nam,
274 int pru_connect2_notsupp(struct socket *so1, struct socket *so2);
275 int pru_control_notsupp(struct socket *so, u_long cmd, void *data,
276 struct ifnet *ifp, struct thread *td);
277 int pru_disconnect_notsupp(struct socket *so);
278 int pru_listen_notsupp(struct socket *so, int backlog, struct thread *td);
279 int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam);
280 int pru_rcvd_notsupp(struct socket *so, int flags);
281 int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags);
282 int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
283 struct sockaddr *addr, struct mbuf *control, struct thread *td);
284 int pru_ready_notsupp(struct socket *so, struct mbuf *m, int count);
285 int pru_sense_null(struct socket *so, struct stat *sb);
286 int pru_shutdown_notsupp(struct socket *so);
287 int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam);
288 int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
289 struct uio *uio, struct mbuf *top, struct mbuf *control, int flags,
291 int pru_soreceive_notsupp(struct socket *so, struct sockaddr **paddr,
292 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
294 int pru_sopoll_notsupp(struct socket *so, int events, struct ucred *cred,
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_ROUTEDEAD 1 /* select new route if possible ??? */
306 /* was PRC_QUENCH2 3 DEC congestion bit says slow down */
307 /* was PRC_QUENCH 4 Deprecated by RFC 6633 */
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 ctloutput 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 struct domain *pffinddomain(int family);
368 struct protosw *pffindproto(int family, int protocol, int type);
369 struct protosw *pffindtype(int family, int type);
370 int pf_proto_register(int family, struct protosw *npr);
371 int pf_proto_unregister(int family, int protocol, int type);