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|
/* $OpenBSD: raw_usrreq.c,v 1.23 2016/09/05 15:12:30 claudio Exp $ */
/* $NetBSD: raw_usrreq.c,v 1.11 1996/02/13 22:00:43 christos Exp $ */
/*
* Copyright (c) 1980, 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. 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.
*
* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <net/netisr.h>
#include <net/raw_cb.h>
#include <sys/stdarg.h>
/*
* Initialize raw connection block q.
*/
void
raw_init(void)
{
LIST_INIT(&rawcb);
}
/*
* Raw protocol input routine. Find the socket
* associated with the packet(s) and move them over. If
* nothing exists for this packet, drop it.
*/
/*
* Raw protocol interface.
*/
void
raw_input(struct mbuf *m0, ...)
{
struct rawcb *rp;
struct mbuf *m = m0;
int sockets = 0;
struct socket *last;
va_list ap;
struct sockproto *proto;
struct sockaddr *src, *dst;
va_start(ap, m0);
proto = va_arg(ap, struct sockproto *);
src = va_arg(ap, struct sockaddr *);
dst = va_arg(ap, struct sockaddr *);
va_end(ap);
last = 0;
LIST_FOREACH(rp, &rawcb, rcb_list) {
if (rp->rcb_socket->so_state & SS_CANTRCVMORE)
continue;
if (rp->rcb_proto.sp_family != proto->sp_family)
continue;
if (rp->rcb_proto.sp_protocol &&
rp->rcb_proto.sp_protocol != proto->sp_protocol)
continue;
/*
* We assume the lower level routines have
* placed the address in a canonical format
* suitable for a structure comparison.
*
* Note that if the lengths are not the same
* the comparison will fail at the first byte.
*/
#define equal(a1, a2) \
(bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
continue;
if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
continue;
if (last) {
struct mbuf *n;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
if (sbappendaddr(&last->so_rcv, src,
n, (struct mbuf *)NULL) == 0)
/* should notify about lost packet */
m_freem(n);
else {
sorwakeup(last);
sockets++;
}
}
}
last = rp->rcb_socket;
}
if (last) {
if (sbappendaddr(&last->so_rcv, src,
m, (struct mbuf *)NULL) == 0)
m_freem(m);
else {
sorwakeup(last);
sockets++;
}
} else
m_freem(m);
}
int
raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
struct mbuf *control, struct proc *p)
{
struct rawcb *rp = sotorawcb(so);
int error = 0;
int len, s;
if (req == PRU_CONTROL)
return (EOPNOTSUPP);
if (control && control->m_len) {
error = EOPNOTSUPP;
goto release;
}
if (rp == 0) {
error = EINVAL;
goto release;
}
s = splsoftnet();
switch (req) {
/*
* Allocate a raw control block and fill in the
* necessary info to allow packets to be routed to
* the appropriate raw interface routine.
*/
case PRU_ATTACH:
if ((so->so_state & SS_PRIV) == 0) {
error = EACCES;
break;
}
error = raw_attach(so, (int)(long)nam);
break;
/*
* Destroy state just before socket deallocation.
* Flush data or not depending on the options.
*/
case PRU_DETACH:
if (rp == 0) {
error = ENOTCONN;
break;
}
raw_detach(rp);
break;
#ifdef notdef
/*
* If a socket isn't bound to a single address,
* the raw input routine will hand it anything
* within that protocol family (assuming there's
* nothing else around it should go to).
*/
case PRU_CONNECT:
if (rp->rcb_faddr) {
error = EISCONN;
break;
}
nam = m_copym(nam, 0, M_COPYALL, M_WAIT);
rp->rcb_faddr = mtod(nam, struct sockaddr *);
soisconnected(so);
break;
case PRU_BIND:
if (rp->rcb_laddr) {
error = EINVAL; /* XXX */
break;
}
error = raw_bind(so, nam);
break;
#else
case PRU_CONNECT:
case PRU_BIND:
#endif
case PRU_CONNECT2:
error = EOPNOTSUPP;
break;
case PRU_DISCONNECT:
if (rp->rcb_faddr == 0) {
error = ENOTCONN;
break;
}
raw_disconnect(rp);
soisdisconnected(so);
break;
/*
* Mark the connection as being incapable of further input.
*/
case PRU_SHUTDOWN:
socantsendmore(so);
break;
/*
* Ship a packet out. The appropriate raw output
* routine handles any massaging necessary.
*/
case PRU_SEND:
if (nam) {
if (rp->rcb_faddr) {
error = EISCONN;
break;
}
rp->rcb_faddr = mtod(nam, struct sockaddr *);
} else if (rp->rcb_faddr == 0) {
error = ENOTCONN;
break;
}
error = (*so->so_proto->pr_output)(m, so);
m = NULL;
if (nam)
rp->rcb_faddr = 0;
break;
case PRU_ABORT:
raw_disconnect(rp);
sofree(so);
soisdisconnected(so);
break;
case PRU_SENSE:
/*
* stat: don't bother with a blocksize.
*/
splx(s);
return (0);
/*
* Not supported.
*/
case PRU_RCVOOB:
case PRU_RCVD:
splx(s);
return (EOPNOTSUPP);
case PRU_LISTEN:
case PRU_ACCEPT:
case PRU_SENDOOB:
error = EOPNOTSUPP;
break;
case PRU_SOCKADDR:
if (rp->rcb_laddr == 0) {
error = EINVAL;
break;
}
len = rp->rcb_laddr->sa_len;
bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len);
nam->m_len = len;
break;
case PRU_PEERADDR:
if (rp->rcb_faddr == 0) {
error = ENOTCONN;
break;
}
len = rp->rcb_faddr->sa_len;
bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len);
nam->m_len = len;
break;
default:
panic("raw_usrreq");
}
splx(s);
release:
m_freem(m);
return (error);
}
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