528737fdfe
rtsock allowing routing daemons to filter routing updates on an rtsock per FIB. Adjust raw_input() and split it into wrapper and a new function taking an optional callback argument even though we only have one consumer [1] to keep the hackish flags local to rtsock.c. PR: kern/134931 Submitted by: multiple (see PR) Suggested by: rwatson [1] Reviewed by: rwatson MFC after: 3 days
275 lines
6.2 KiB
C
275 lines
6.2 KiB
C
/*-
|
|
* 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.
|
|
* 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.
|
|
*
|
|
* @(#)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/raw_cb.h>
|
|
#include <net/vnet.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 = 0;
|
|
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_copy(m, 0, (int)M_COPYALL);
|
|
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)) {
|
|
/* XXXRW: Should control also be freed here? */
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
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,
|
|
};
|