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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sx.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/vnet.h>
#include <net/raw_cb.h>
MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);
/*
* Initialize raw connection block q.
*/
void
raw_init(void)
{
LIST_INIT(&V_rawcb_list);
}
/*
* 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 sockproto *proto, struct sockaddr *src)
{
return (raw_input_ext(m0, proto, src, NULL));
}
void
raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src,
raw_input_cb_fn cb)
{
struct rawcb *rp;
struct mbuf *m = m0;
struct socket *last;
last = NULL;
mtx_lock(&rawcb_mtx);
LIST_FOREACH(rp, &V_rawcb_list, 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;
if (cb != NULL && (*cb)(m, proto, src, rp) != 0)
continue;
if (last) {
struct mbuf *n;
n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
if (n) {
if (sbappendaddr(&last->so_rcv, src,
n, (struct mbuf *)0) == 0)
/* should notify about lost packet */
m_freem(n);
else
sorwakeup(last);
}
}
last = rp->rcb_socket;
}
if (last) {
if (sbappendaddr(&last->so_rcv, src,
m, (struct mbuf *)0) == 0)
m_freem(m);
else
sorwakeup(last);
} else
m_freem(m);
mtx_unlock(&rawcb_mtx);
}
/*ARGSUSED*/
void
raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
{
if (cmd < 0 || cmd >= PRC_NCMDS)
return;
/* INCOMPLETE */
}
static void
raw_uabort(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
soisdisconnected(so);
}
static void
raw_uclose(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
soisdisconnected(so);
}
/* pru_accept is EOPNOTSUPP */
static int
raw_uattach(struct socket *so, int proto, struct thread *td)
{
int error;
/*
* Implementors of raw sockets will already have allocated the PCB,
* so it must be non-NULL here.
*/
KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
if (td != NULL) {
error = priv_check(td, PRIV_NET_RAW);
if (error)
return (error);
}
return (raw_attach(so, proto));
}
static int
raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
{
return (EINVAL);
}
static int
raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
{
return (EINVAL);
}
/* pru_connect2 is EOPNOTSUPP */
/* pru_control is EOPNOTSUPP */
static void
raw_udetach(struct socket *so)
{
struct rawcb *rp = sotorawcb(so);
KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
raw_detach(rp);
}
static int
raw_udisconnect(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
return (ENOTCONN);
}
/* pru_listen is EOPNOTSUPP */
static int
raw_upeeraddr(struct socket *so, struct sockaddr **nam)
{
KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
return (ENOTCONN);
}
/* pru_rcvd is EOPNOTSUPP */
/* pru_rcvoob is EOPNOTSUPP */
static int
raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, struct thread *td)
{
KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
if ((flags & PRUS_OOB) || (control && control->m_len)) {
if (m != NULL)
m_freem(m);
if (control != NULL)
m_freem(control);
return (EOPNOTSUPP);
}
/*
* For historical (bad?) reasons, we effectively ignore the address
* argument to sendto(2). Perhaps we should return an error instead?
*/
return ((*so->so_proto->pr_output)(m, so));
}
/* pru_sense is null */
static int
raw_ushutdown(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
socantsendmore(so);
return (0);
}
static int
raw_usockaddr(struct socket *so, struct sockaddr **nam)
{
KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
return (EINVAL);
}
struct pr_usrreqs raw_usrreqs = {
.pru_abort = raw_uabort,
.pru_attach = raw_uattach,
.pru_bind = raw_ubind,
.pru_connect = raw_uconnect,
.pru_detach = raw_udetach,
.pru_disconnect = raw_udisconnect,
.pru_peeraddr = raw_upeeraddr,
.pru_send = raw_usend,
.pru_shutdown = raw_ushutdown,
.pru_sockaddr = raw_usockaddr,
.pru_close = raw_uclose,
};
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