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/* $NetBSD: raw_usrreq.c,v 1.55 2016/01/20 21:43:59 riastradh 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
*/
/*
* Raw protocol interface.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: raw_usrreq.c,v 1.55 2016/01/20 21:43:59 riastradh Exp $");
#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 <sys/proc.h>
#include <sys/kauth.h>
#include <net/if.h>
#include <net/route.h>
#include <net/netisr.h>
#include <net/raw_cb.h>
void
raw_init(void)
{
LIST_INIT(&rawcb);
}
static inline int
equal(const struct sockaddr *a1, const struct sockaddr *a2)
{
return memcmp(a1, a2, a1->sa_len) == 0;
}
/*
* raw_input: find the socket associated with the packet and move it over.
* If nothing exists for this packet, drop it.
*/
void
raw_input(struct mbuf *m0, ...)
{
struct rawcb *rp;
struct mbuf *m = m0;
struct socket *last;
va_list ap;
struct sockproto *proto;
struct sockaddr *src, *dst;
KASSERT(mutex_owned(softnet_lock));
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 = NULL;
LIST_FOREACH(rp, &rawcb, rcb_list) {
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.
*/
if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
continue;
if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
continue;
if (last != NULL) {
struct mbuf *n;
if ((n = m_copy(m, 0, M_COPYALL)) == NULL)
;
else if (sbappendaddr(&last->so_rcv, src, n, NULL) == 0)
/* should notify about lost packet */
m_freem(n);
else {
sorwakeup(last);
}
}
last = rp->rcb_socket;
}
if (last == NULL || sbappendaddr(&last->so_rcv, src, m, NULL) == 0)
m_freem(m);
else {
sorwakeup(last);
}
}
void *
raw_ctlinput(int cmd, const struct sockaddr *arg, void *d)
{
if ((unsigned)cmd >= PRC_NCMDS)
return NULL;
return NULL;
/* INCOMPLETE */
}
void
raw_setsockaddr(struct rawcb *rp, struct sockaddr *nam)
{
memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len);
}
void
raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam)
{
memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len);
}
int
raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, struct lwp *l,
int (*output)(struct mbuf *, struct socket *))
{
struct rawcb *rp = sotorawcb(so);
int error = 0;
KASSERT(rp != NULL);
/*
* Ship a packet out. The appropriate raw output
* routine handles any massaging necessary.
*/
if (control && control->m_len) {
m_freem(control);
m_freem(m);
return EINVAL;
}
if (nam) {
if ((so->so_state & SS_ISCONNECTED) != 0) {
error = EISCONN;
goto die;
}
error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l);
if (error) {
die:
m_freem(m);
return error;
}
} else {
if ((so->so_state & SS_ISCONNECTED) == 0) {
error = ENOTCONN;
goto die;
}
}
error = (*output)(m, so);
if (nam)
raw_disconnect(rp);
return error;
}
int
raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
struct mbuf *control, struct lwp *l)
{
KASSERT(req != PRU_ATTACH);
KASSERT(req != PRU_DETACH);
KASSERT(req != PRU_ACCEPT);
KASSERT(req != PRU_BIND);
KASSERT(req != PRU_LISTEN);
KASSERT(req != PRU_CONNECT);
KASSERT(req != PRU_CONNECT2);
KASSERT(req != PRU_DISCONNECT);
KASSERT(req != PRU_SHUTDOWN);
KASSERT(req != PRU_ABORT);
KASSERT(req != PRU_CONTROL);
KASSERT(req != PRU_SENSE);
KASSERT(req != PRU_PEERADDR);
KASSERT(req != PRU_SOCKADDR);
KASSERT(req != PRU_RCVD);
KASSERT(req != PRU_RCVOOB);
KASSERT(req != PRU_SEND);
KASSERT(req != PRU_SENDOOB);
KASSERT(req != PRU_PURGEIF);
if (sotorawcb(so) == NULL)
return EINVAL;
panic("raw_usrreq");
return 0;
}
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