freebsd-dev/sys/net/raw_usrreq.c
Garrett Wollman a29f300e80 The long-awaited mega-massive-network-code- cleanup. Part I.
This commit includes the following changes:
1) Old-style (pr_usrreq()) protocols are no longer supported, the compatibility
glue for them is deleted, and the kernel will panic on boot if any are compiled
in.

2) Certain protocol entry points are modified to take a process structure,
so they they can easily tell whether or not it is possible to sleep, and
also to access credentials.

3) SS_PRIV is no more, and with it goes the SO_PRIVSTATE setsockopt()
call.  Protocols should use the process pointer they are now passed.

4) The PF_LOCAL and PF_ROUTE families have been updated to use the new
style, as has the `raw' skeleton family.

5) PF_LOCAL sockets now obey the process's umask when creating a socket
in the filesystem.

As a result, LINT is now broken.  I'm hoping that some enterprising hacker
with a bit more time will either make the broken bits work (should be
easy for netipx) or dike them out.
1997-04-27 20:01:29 +00:00

313 lines
7.0 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.
* 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.
*
* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
* $Id: raw_usrreq.c,v 1.11 1997/04/14 18:23:25 phk Exp $
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/route.h>
#include <net/netisr.h>
#include <net/raw_cb.h>
/*
* Initialize raw connection block q.
*/
void
raw_init()
{
LIST_INIT(&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(m0, proto, src, dst)
struct mbuf *m0;
register struct sockproto *proto;
struct sockaddr *src, *dst;
{
register struct rawcb *rp;
register struct mbuf *m = m0;
register int sockets = 0;
struct socket *last;
last = 0;
LIST_FOREACH(rp, &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;
/*
* 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;
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);
sockets++;
}
}
}
last = rp->rcb_socket;
}
if (last) {
if (sbappendaddr(&last->so_rcv, src,
m, (struct mbuf *)0) == 0)
m_freem(m);
else {
sorwakeup(last);
sockets++;
}
} else
m_freem(m);
}
/*ARGSUSED*/
void
raw_ctlinput(cmd, arg, dummy)
int cmd;
struct sockaddr *arg;
void *dummy;
{
if (cmd < 0 || cmd > PRC_NCMDS)
return;
/* INCOMPLETE */
}
static int
raw_uabort(struct socket *so)
{
struct rawcb *rp = sotorawcb(so);
if (rp == 0)
return EINVAL;
raw_disconnect(rp);
sofree(so);
soisdisconnected(so);
return 0;
}
/* pru_accept is EOPNOTSUPP */
static int
raw_uattach(struct socket *so, int proto, struct proc *p)
{
struct rawcb *rp = sotorawcb(so);
int error;
if (rp == 0)
return EINVAL;
if (p && (error = suser(p->p_ucred, &p->p_acflag)) != 0)
return error;
return raw_attach(so, proto);
}
static int
raw_ubind(struct socket *so, struct mbuf *nam, struct proc *p)
{
return EINVAL;
}
static int
raw_uconnect(struct socket *so, struct mbuf *nam, struct proc *p)
{
return EINVAL;
}
/* pru_connect2 is EOPNOTSUPP */
/* pru_control is EOPNOTSUPP */
static int
raw_udetach(struct socket *so)
{
struct rawcb *rp = sotorawcb(so);
if (rp == 0)
return EINVAL;
raw_detach(rp);
return 0;
}
static int
raw_udisconnect(struct socket *so)
{
struct rawcb *rp = sotorawcb(so);
if (rp == 0)
return EINVAL;
if (rp->rcb_faddr == 0) {
return ENOTCONN;
}
raw_disconnect(rp);
soisdisconnected(so);
return 0;
}
/* pru_listen is EOPNOTSUPP */
static int
raw_upeeraddr(struct socket *so, struct mbuf *nam)
{
struct rawcb *rp = sotorawcb(so);
unsigned len;
if (rp == 0)
return EINVAL;
if (rp->rcb_faddr == 0) {
return ENOTCONN;
}
len = rp->rcb_faddr->sa_len;
bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), len);
nam->m_len = len;
return 0;
}
/* pru_rcvd is EOPNOTSUPP */
/* pru_rcvoob is EOPNOTSUPP */
static int
raw_usend(struct socket *so, int flags, struct mbuf *m,
struct mbuf *nam, struct mbuf *control, struct proc *p)
{
int error;
struct rawcb *rp = sotorawcb(so);
if (rp == 0) {
error = EINVAL;
goto release;
}
if (flags & PRUS_OOB) {
error = EOPNOTSUPP;
goto release;
}
if (control && control->m_len) {
error = EOPNOTSUPP;
goto release;
}
if (nam) {
if (rp->rcb_faddr) {
error = EISCONN;
goto release;
}
rp->rcb_faddr = mtod(nam, struct sockaddr *);
} else if (rp->rcb_faddr == 0) {
error = ENOTCONN;
goto release;
}
error = (*so->so_proto->pr_output)(m, so);
m = NULL;
if (nam)
rp->rcb_faddr = 0;
release:
if (m != NULL)
m_freem(m);
return (error);
}
/* pru_sense is null */
static int
raw_ushutdown(struct socket *so)
{
struct rawcb *rp = sotorawcb(so);
if (rp == 0)
return EINVAL;
socantsendmore(so);
return 0;
}
static int
raw_usockaddr(struct socket *so, struct mbuf *nam)
{
struct rawcb *rp = sotorawcb(so);
unsigned len;
if (rp == 0)
return EINVAL;
if (rp->rcb_laddr == 0)
return EINVAL;
len = rp->rcb_laddr->sa_len;
bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), len);
nam->m_len = len;
return 0;
}
struct pr_usrreqs raw_usrreqs = {
raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect,
pru_connect2_notsupp, pru_control_notsupp, raw_udetach,
raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp,
pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown,
raw_usockaddr, sosend, soreceive, soselect
};