/*-
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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
* $FreeBSD$
*/
#ifndef _SYS_PROTOSW_H_
#define _SYS_PROTOSW_H_
/*
* For pfil_head structure.
*/
#include <net/pfil.h>
/* Forward declare these structures referenced from prototypes below. */
struct mbuf;
struct proc;
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.
*/
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 */
void (*pr_input) __P((struct mbuf *, int len));
/* input to protocol (from below) */
int (*pr_output) __P((struct mbuf *m, struct socket *so));
/* output to protocol (from above) */
void (*pr_ctlinput)__P((int, struct sockaddr *, void *));
/* control input (from below) */
int (*pr_ctloutput)__P((struct socket *, struct sockopt *));
/* control output (from above) */
/* user-protocol hook */
void *pr_ousrreq;
/* utility hooks */
void (*pr_init) __P((void)); /* initialization hook */
void (*pr_fasttimo) __P((void));
/* fast timeout (200ms) */
void (*pr_slowtimo) __P((void));
/* slow timeout (500ms) */
void (*pr_drain) __P((void));
/* flush any excess space possible */
struct pr_usrreqs *pr_usrreqs; /* supersedes pr_usrreq() */
struct pfil_head pr_pfh;
};
/*#endif*/
#define PR_SLOWHZ 2 /* 2 slow timeouts per second */
#define PR_FASTHZ 5 /* 5 fast timeouts per second */
/*
* 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 */
/*
* The arguments to usrreq are:
* (*protosw[].pr_usrreq)(up, req, m, nam, opt);
* where up is a (struct socket *), req is one of these requests,
* m is a optional mbuf chain containing a message,
* nam is an optional mbuf chain containing an address,
* and opt is a pointer to a socketopt structure or nil.
* The protocol is responsible for disposal of the mbuf chain m,
* the caller is responsible for any space held by nam and opt.
* A non-zero return from usrreq gives an
* UNIX error number which should be passed to higher level software.
*/
#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_NREQ 22
#ifdef PRUREQUESTS
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",
};
#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.
* Having this structure separated out from the main protoswitch is allegedly
* a big (12 cycles per call) lose on high-end CPUs. We will eventually
* migrate this stuff back into the main structure.
*/
struct pr_usrreqs {
int (*pru_abort) __P((struct socket *so));
int (*pru_accept) __P((struct socket *so, struct sockaddr **nam));
int (*pru_attach) __P((struct socket *so, int proto,
struct proc *p));
int (*pru_bind) __P((struct socket *so, struct sockaddr *nam,
struct proc *p));
int (*pru_connect) __P((struct socket *so, struct sockaddr *nam,
struct proc *p));
int (*pru_connect2) __P((struct socket *so1, struct socket *so2));
int (*pru_control) __P((struct socket *so, u_long cmd, caddr_t data,
struct ifnet *ifp, struct proc *p));
int (*pru_detach) __P((struct socket *so));
int (*pru_disconnect) __P((struct socket *so));
int (*pru_listen) __P((struct socket *so, struct proc *p));
int (*pru_peeraddr) __P((struct socket *so,
struct sockaddr **nam));
int (*pru_rcvd) __P((struct socket *so, int flags));
int (*pru_rcvoob) __P((struct socket *so, struct mbuf *m,
int flags));
int (*pru_send) __P((struct socket *so, int flags, struct mbuf *m,
struct sockaddr *addr, struct mbuf *control,
struct proc *p));
#define PRUS_OOB 0x1
#define PRUS_EOF 0x2
#define PRUS_MORETOCOME 0x4
int (*pru_sense) __P((struct socket *so, struct stat *sb));
int (*pru_shutdown) __P((struct socket *so));
int (*pru_sockaddr) __P((struct socket *so,
struct sockaddr **nam));
/*
* These three added later, so they are out of order. They are used
* for shortcutting (fast path input/output) in some protocols.
* XXX - that's a lie, they are not implemented yet
* Rather than calling sosend() etc. directly, calls are made
* through these entry points. For protocols which still use
* the generic code, these just point to those routines.
*/
int (*pru_sosend) __P((struct socket *so, struct sockaddr *addr,
struct uio *uio, struct mbuf *top,
struct mbuf *control, int flags,
struct proc *p));
int (*pru_soreceive) __P((struct socket *so,
struct sockaddr **paddr,
struct uio *uio, struct mbuf **mp0,
struct mbuf **controlp, int *flagsp));
int (*pru_sopoll) __P((struct socket *so, int events,
struct ucred *cred, struct proc *p));
};
int pru_accept_notsupp __P((struct socket *so, struct sockaddr **nam));
int pru_connect_notsupp __P((struct socket *so, struct sockaddr *nam,
struct proc *p));
int pru_connect2_notsupp __P((struct socket *so1, struct socket *so2));
int pru_control_notsupp __P((struct socket *so, u_long cmd, caddr_t data,
struct ifnet *ifp, struct proc *p));
int pru_listen_notsupp __P((struct socket *so, struct proc *p));
int pru_rcvd_notsupp __P((struct socket *so, int flags));
int pru_rcvoob_notsupp __P((struct socket *so, struct mbuf *m, int flags));
int pru_sense_null __P((struct socket *so, struct stat *sb));
#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 usrreq 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 __P((int, struct sockaddr *));
struct protosw *pffindproto __P((int family, int protocol, int type));
struct protosw *pffindtype __P((int family, int type));
#endif
#endif
