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/*-
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)protosw.h 8.1 (Berkeley) 6/2/93
* $FreeBSD: release/9.1.0/sys/sys/protosw.h 193731 2009-06-08 17:15:40Z zec $
*/
#ifndef _SYS_PROTOSW_H_
#define _SYS_PROTOSW_H_
/* Forward declare these structures referenced from prototypes below. */
struct mbuf;
struct thread;
struct sockaddr;
struct socket;
struct sockopt;
/*#ifdef _KERNEL*/
/*
* Protocol switch table.
*
* Each protocol has a handle initializing one of these structures,
* which is used for protocol-protocol and system-protocol communication.
*
* A protocol is called through the pr_init entry before any other.
* Thereafter it is called every 200ms through the pr_fasttimo entry and
* every 500ms through the pr_slowtimo for timer based actions.
* The system will call the pr_drain entry if it is low on space and
* this should throw away any non-critical data.
*
* Protocols pass data between themselves as chains of mbufs using
* the pr_input and pr_output hooks. Pr_input passes data up (towards
* the users) and pr_output passes it down (towards the interfaces); control
* information passes up and down on pr_ctlinput and pr_ctloutput.
* The protocol is responsible for the space occupied by any the
* arguments to these entries and must dispose it.
*
* In retrospect, it would be a lot nicer to use an interface
* similar to the vnode VOP interface.
*/
/* USE THESE FOR YOUR PROTOTYPES ! */
typedef void pr_input_t (struct mbuf *, int);
typedef int pr_input6_t (struct mbuf **, int*, int); /* XXX FIX THIS */
typedef int pr_output_t (struct mbuf *, struct socket *);
typedef void pr_ctlinput_t (int, struct sockaddr *, void *);
typedef int pr_ctloutput_t (struct socket *, struct sockopt *);
typedef void pr_init_t (void);
typedef void pr_destroy_t (void);
typedef void pr_fasttimo_t (void);
typedef void pr_slowtimo_t (void);
typedef void pr_drain_t (void);
struct protosw {
short pr_type; /* socket type used for */
struct domain *pr_domain; /* domain protocol a member of */
short pr_protocol; /* protocol number */
short pr_flags; /* see below */
/* protocol-protocol hooks */
pr_input_t *pr_input; /* input to protocol (from below) */
pr_output_t *pr_output; /* output to protocol (from above) */
pr_ctlinput_t *pr_ctlinput; /* control input (from below) */
pr_ctloutput_t *pr_ctloutput; /* control output (from above) */
/* utility hooks */
pr_init_t *pr_init;
pr_destroy_t *pr_destroy;
pr_fasttimo_t *pr_fasttimo; /* fast timeout (200ms) */
pr_slowtimo_t *pr_slowtimo; /* slow timeout (500ms) */
pr_drain_t *pr_drain; /* flush any excess space possible */
struct pr_usrreqs *pr_usrreqs; /* user-protocol hook */
};
/*#endif*/
#define PR_SLOWHZ 2 /* 2 slow timeouts per second */
#define PR_FASTHZ 5 /* 5 fast timeouts per second */
/*
* This number should be defined again within each protocol family to avoid
* confusion.
*/
#define PROTO_SPACER 32767 /* spacer for loadable protocols */
/*
* Values for pr_flags.
* PR_ADDR requires PR_ATOMIC;
* PR_ADDR and PR_CONNREQUIRED are mutually exclusive.
* PR_IMPLOPCL means that the protocol allows sendto without prior connect,
* and the protocol understands the MSG_EOF flag. The first property is
* is only relevant if PR_CONNREQUIRED is set (otherwise sendto is allowed
* anyhow).
*/
#define PR_ATOMIC 0x01 /* exchange atomic messages only */
#define PR_ADDR 0x02 /* addresses given with messages */
#define PR_CONNREQUIRED 0x04 /* connection required by protocol */
#define PR_WANTRCVD 0x08 /* want PRU_RCVD calls */
#define PR_RIGHTS 0x10 /* passes capabilities */
#define PR_IMPLOPCL 0x20 /* implied open/close */
#define PR_LASTHDR 0x40 /* enforce ipsec policy; last header */
/*
* In earlier BSD network stacks, a single pr_usrreq() function pointer was
* invoked with an operation number indicating what operation was desired.
* We now provide individual function pointers which protocols can implement,
* which offers a number of benefits (such as type checking for arguments).
* These older constants are still present in order to support TCP debugging.
*/
#define PRU_ATTACH 0 /* attach protocol to up */
#define PRU_DETACH 1 /* detach protocol from up */
#define PRU_BIND 2 /* bind socket to address */
#define PRU_LISTEN 3 /* listen for connection */
#define PRU_CONNECT 4 /* establish connection to peer */
#define PRU_ACCEPT 5 /* accept connection from peer */
#define PRU_DISCONNECT 6 /* disconnect from peer */
#define PRU_SHUTDOWN 7 /* won't send any more data */
#define PRU_RCVD 8 /* have taken data; more room now */
#define PRU_SEND 9 /* send this data */
#define PRU_ABORT 10 /* abort (fast DISCONNECT, DETATCH) */
#define PRU_CONTROL 11 /* control operations on protocol */
#define PRU_SENSE 12 /* return status into m */
#define PRU_RCVOOB 13 /* retrieve out of band data */
#define PRU_SENDOOB 14 /* send out of band data */
#define PRU_SOCKADDR 15 /* fetch socket's address */
#define PRU_PEERADDR 16 /* fetch peer's address */
#define PRU_CONNECT2 17 /* connect two sockets */
/* begin for protocols internal use */
#define PRU_FASTTIMO 18 /* 200ms timeout */
#define PRU_SLOWTIMO 19 /* 500ms timeout */
#define PRU_PROTORCV 20 /* receive from below */
#define PRU_PROTOSEND 21 /* send to below */
/* end for protocol's internal use */
#define PRU_SEND_EOF 22 /* send and close */
#define PRU_SOSETLABEL 23 /* MAC label change */
#define PRU_CLOSE 24 /* socket close */
#define PRU_FLUSH 25 /* flush the socket */
#define PRU_NREQ 25
#ifdef PRUREQUESTS
const char *prurequests[] = {
"ATTACH", "DETACH", "BIND", "LISTEN",
"CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
"RCVD", "SEND", "ABORT", "CONTROL",
"SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
"PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
"PROTORCV", "PROTOSEND", "SEND_EOF", "SOSETLABEL",
"CLOSE", "FLUSH",
};
#endif
#ifdef _KERNEL /* users shouldn't see this decl */
struct ifnet;
struct stat;
struct ucred;
struct uio;
/*
* If the ordering here looks odd, that's because it's alphabetical. These
* should eventually be merged back into struct protosw.
*
* Some fields initialized to defaults if they are NULL.
* See uipc_domain.c:net_init_domain()
*/
struct pr_usrreqs {
void (*pru_abort)(struct socket *so);
int (*pru_accept)(struct socket *so, struct sockaddr **nam);
int (*pru_attach)(struct socket *so, int proto, struct thread *td);
int (*pru_bind)(struct socket *so, struct sockaddr *nam,
struct thread *td);
int (*pru_connect)(struct socket *so, struct sockaddr *nam,
struct thread *td);
int (*pru_connect2)(struct socket *so1, struct socket *so2);
int (*pru_control)(struct socket *so, u_long cmd, caddr_t data,
struct ifnet *ifp, struct thread *td);
void (*pru_detach)(struct socket *so);
int (*pru_disconnect)(struct socket *so);
int (*pru_listen)(struct socket *so, int backlog,
struct thread *td);
int (*pru_peeraddr)(struct socket *so, struct sockaddr **nam);
int (*pru_rcvd)(struct socket *so, int flags);
int (*pru_rcvoob)(struct socket *so, struct mbuf *m, int flags);
int (*pru_send)(struct socket *so, int flags, struct mbuf *m,
struct sockaddr *addr, struct mbuf *control,
struct thread *td);
#define PRUS_OOB 0x1
#define PRUS_EOF 0x2
#define PRUS_MORETOCOME 0x4
int (*pru_sense)(struct socket *so, struct stat *sb);
int (*pru_shutdown)(struct socket *so);
int (*pru_flush)(struct socket *so, int direction);
int (*pru_sockaddr)(struct socket *so, struct sockaddr **nam);
int (*pru_sosend)(struct socket *so, struct sockaddr *addr,
struct uio *uio, struct mbuf *top, struct mbuf *control,
int flags, struct thread *td);
int (*pru_soreceive)(struct socket *so, struct sockaddr **paddr,
struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
int *flagsp);
int (*pru_sopoll)(struct socket *so, int events,
struct ucred *cred, struct thread *td);
void (*pru_sosetlabel)(struct socket *so);
void (*pru_close)(struct socket *so);
};
/*
* All nonvoid pru_*() functions below return EOPNOTSUPP.
*/
int pru_accept_notsupp(struct socket *so, struct sockaddr **nam);
int pru_attach_notsupp(struct socket *so, int proto, struct thread *td);
int pru_bind_notsupp(struct socket *so, struct sockaddr *nam,
struct thread *td);
int pru_connect_notsupp(struct socket *so, struct sockaddr *nam,
struct thread *td);
int pru_connect2_notsupp(struct socket *so1, struct socket *so2);
int pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
struct ifnet *ifp, struct thread *td);
int pru_disconnect_notsupp(struct socket *so);
int pru_listen_notsupp(struct socket *so, int backlog, struct thread *td);
int pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam);
int pru_rcvd_notsupp(struct socket *so, int flags);
int pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags);
int pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
struct sockaddr *addr, struct mbuf *control, struct thread *td);
int pru_sense_null(struct socket *so, struct stat *sb);
int pru_shutdown_notsupp(struct socket *so);
int pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam);
int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
struct uio *uio, struct mbuf *top, struct mbuf *control, int flags,
struct thread *td);
int pru_soreceive_notsupp(struct socket *so, struct sockaddr **paddr,
struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
int *flagsp);
int pru_sopoll_notsupp(struct socket *so, int events, struct ucred *cred,
struct thread *td);
#endif /* _KERNEL */
/*
* The arguments to the ctlinput routine are
* (*protosw[].pr_ctlinput)(cmd, sa, arg);
* where cmd is one of the commands below, sa is a pointer to a sockaddr,
* and arg is a `void *' argument used within a protocol family.
*/
#define PRC_IFDOWN 0 /* interface transition */
#define PRC_ROUTEDEAD 1 /* select new route if possible ??? */
#define PRC_IFUP 2 /* interface has come back up */
#define PRC_QUENCH2 3 /* DEC congestion bit says slow down */
#define PRC_QUENCH 4 /* some one said to slow down */
#define PRC_MSGSIZE 5 /* message size forced drop */
#define PRC_HOSTDEAD 6 /* host appears to be down */
#define PRC_HOSTUNREACH 7 /* deprecated (use PRC_UNREACH_HOST) */
#define PRC_UNREACH_NET 8 /* no route to network */
#define PRC_UNREACH_HOST 9 /* no route to host */
#define PRC_UNREACH_PROTOCOL 10 /* dst says bad protocol */
#define PRC_UNREACH_PORT 11 /* bad port # */
/* was PRC_UNREACH_NEEDFRAG 12 (use PRC_MSGSIZE) */
#define PRC_UNREACH_SRCFAIL 13 /* source route failed */
#define PRC_REDIRECT_NET 14 /* net routing redirect */
#define PRC_REDIRECT_HOST 15 /* host routing redirect */
#define PRC_REDIRECT_TOSNET 16 /* redirect for type of service & net */
#define PRC_REDIRECT_TOSHOST 17 /* redirect for tos & host */
#define PRC_TIMXCEED_INTRANS 18 /* packet lifetime expired in transit */
#define PRC_TIMXCEED_REASS 19 /* lifetime expired on reass q */
#define PRC_PARAMPROB 20 /* header incorrect */
#define PRC_UNREACH_ADMIN_PROHIB 21 /* packet administrativly prohibited */
#define PRC_NCMDS 22
#define PRC_IS_REDIRECT(cmd) \
((cmd) >= PRC_REDIRECT_NET && (cmd) <= PRC_REDIRECT_TOSHOST)
#ifdef PRCREQUESTS
char *prcrequests[] = {
"IFDOWN", "ROUTEDEAD", "IFUP", "DEC-BIT-QUENCH2",
"QUENCH", "MSGSIZE", "HOSTDEAD", "#7",
"NET-UNREACH", "HOST-UNREACH", "PROTO-UNREACH", "PORT-UNREACH",
"#12", "SRCFAIL-UNREACH", "NET-REDIRECT", "HOST-REDIRECT",
"TOSNET-REDIRECT", "TOSHOST-REDIRECT", "TX-INTRANS", "TX-REASS",
"PARAMPROB", "ADMIN-UNREACH"
};
#endif
/*
* The arguments to ctloutput are:
* (*protosw[].pr_ctloutput)(req, so, level, optname, optval, p);
* req is one of the actions listed below, so is a (struct socket *),
* level is an indication of which protocol layer the option is intended.
* optname is a protocol dependent socket option request,
* optval is a pointer to a mbuf-chain pointer, for value-return results.
* The protocol is responsible for disposal of the mbuf chain *optval
* if supplied,
* the caller is responsible for any space held by *optval, when returned.
* A non-zero return from ctloutput gives an
* UNIX error number which should be passed to higher level software.
*/
#define PRCO_GETOPT 0
#define PRCO_SETOPT 1
#define PRCO_NCMDS 2
#ifdef PRCOREQUESTS
char *prcorequests[] = {
"GETOPT", "SETOPT",
};
#endif
#ifdef _KERNEL
void pfctlinput(int, struct sockaddr *);
void pfctlinput2(int, struct sockaddr *, void *);
struct protosw *pffindproto(int family, int protocol, int type);
struct protosw *pffindtype(int family, int type);
int pf_proto_register(int family, struct protosw *npr);
int pf_proto_unregister(int family, int protocol, int type);
#endif
#endif