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raw_usrreq.c
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/
raw_usrreq.c
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/*
* 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
* $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $
* $DragonFly: src/sys/net/raw_usrreq.c,v 1.14 2007/06/24 20:00:00 dillon Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/socketvar2.h>
#include <sys/msgport2.h>
#include <net/raw_cb.h>
static struct lwkt_token raw_token = LWKT_TOKEN_INITIALIZER(raw_token);
/*
* Initialize raw connection block q.
*/
void
raw_init(void)
{
LIST_INIT(&rawcb_list);
}
/************************************************************************
* RAW PROTOCOL INTERFACE *
************************************************************************/
/*
* Raw protocol input routine. Find the socket associated with the packet(s)
* and move them over. If nothing exists for this packet, drop it. This
* routine is indirect called via rts_input() and will be serialized on
* cpu 0.
*
* Most other raw protocol interface functions are also serialized XXX.
*/
void
raw_input(struct mbuf *m0, const struct sockproto *proto,
const struct sockaddr *src, const struct sockaddr *dst,
const struct rawcb *skip)
{
struct rawcb *rp;
struct mbuf *m = m0;
struct socket *last;
lwkt_gettoken(&raw_token);
last = NULL;
LIST_FOREACH(rp, &rawcb_list, list) {
if (rp == skip)
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.
*/
if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst))
continue;
if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src))
continue;
if (last) {
struct mbuf *n;
n = m_copypacket(m, MB_DONTWAIT);
if (n != NULL) {
lwkt_gettoken(&last->so_rcv.ssb_token);
if (ssb_appendaddr(&last->so_rcv, src, n,
NULL) == 0) {
/* should notify about lost packet */
m_freem(n);
} else {
sorwakeup(last);
}
lwkt_reltoken(&last->so_rcv.ssb_token);
}
}
last = rp->rcb_socket;
}
if (last) {
lwkt_gettoken(&last->so_rcv.ssb_token);
if (ssb_appendaddr(&last->so_rcv, src, m, NULL) == 0)
m_freem(m);
else
sorwakeup(last);
lwkt_reltoken(&last->so_rcv.ssb_token);
} else {
m_freem(m);
}
lwkt_reltoken(&raw_token);
}
/*
* nm_cmd, nm_arg, nm_extra
*/
void
raw_ctlinput(netmsg_t msg)
{
int error = 0;
if (msg->ctlinput.nm_cmd < 0 || msg->ctlinput.nm_cmd > PRC_NCMDS)
;
lwkt_replymsg(&msg->lmsg, error);
}
/*
* NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
* will sofree() it when we return.
*/
static void
raw_uabort(netmsg_t msg)
{
struct rawcb *rp = sotorawcb(msg->base.nm_so);
int error;
if (rp) {
raw_disconnect(rp);
soisdisconnected(msg->base.nm_so);
error = 0;
} else {
error = EINVAL;
}
lwkt_replymsg(&msg->lmsg, error);
}
/* pru_accept is EOPNOTSUPP */
static void
raw_uattach(netmsg_t msg)
{
struct socket *so = msg->base.nm_so;
int proto = msg->attach.nm_proto;
struct pru_attach_info *ai = msg->attach.nm_ai;
struct rawcb *rp;
int error;
rp = sotorawcb(so);
if (rp) {
error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY);
if (error == 0)
error = raw_attach(so, proto, ai->sb_rlimit);
} else {
error = EINVAL;
}
lwkt_replymsg(&msg->lmsg, error);
}
static void
raw_ubind(netmsg_t msg)
{
lwkt_replymsg(&msg->lmsg, EINVAL);
}
static void
raw_uconnect(netmsg_t msg)
{
lwkt_replymsg(&msg->lmsg, EINVAL);
}
/* pru_connect2 is EOPNOTSUPP */
/* pru_control is EOPNOTSUPP */
static void
raw_udetach(netmsg_t msg)
{
struct rawcb *rp = sotorawcb(msg->base.nm_so);
int error;
if (rp) {
raw_detach(rp);
error = 0;
} else {
error = EINVAL;
}
lwkt_replymsg(&msg->lmsg, error);
}
static void
raw_udisconnect(netmsg_t msg)
{
struct socket *so = msg->base.nm_so;
struct rawcb *rp;
int error;
rp = sotorawcb(so);
if (rp == NULL) {
error = EINVAL;
} else if (rp->rcb_faddr == NULL) {
error = ENOTCONN;
} else {
soreference(so);
raw_disconnect(rp);
soisdisconnected(so);
sofree(so);
error = 0;
}
lwkt_replymsg(&msg->lmsg, error);
}
/* pru_listen is EOPNOTSUPP */
static void
raw_upeeraddr(netmsg_t msg)
{
struct rawcb *rp = sotorawcb(msg->base.nm_so);
int error;
if (rp == NULL) {
error = EINVAL;
} else if (rp->rcb_faddr == NULL) {
error = ENOTCONN;
} else {
*msg->peeraddr.nm_nam = dup_sockaddr(rp->rcb_faddr);
error = 0;
}
lwkt_replymsg(&msg->lmsg, error);
}
/* pru_rcvd is EOPNOTSUPP */
/* pru_rcvoob is EOPNOTSUPP */
static void
raw_usend(netmsg_t msg)
{
struct socket *so = msg->base.nm_so;
struct mbuf *m = msg->send.nm_m;
struct mbuf *control = msg->send.nm_control;
struct rawcb *rp = sotorawcb(so);
struct pr_output_info oi;
int flags = msg->send.nm_flags;
int error;
if (rp == NULL) {
error = EINVAL;
goto release;
}
if (flags & PRUS_OOB) {
error = EOPNOTSUPP;
goto release;
}
if (control && control->m_len) {
error = EOPNOTSUPP;
goto release;
}
if (msg->send.nm_addr) {
if (rp->rcb_faddr) {
error = EISCONN;
goto release;
}
rp->rcb_faddr = msg->send.nm_addr;
} else if (rp->rcb_faddr == NULL) {
error = ENOTCONN;
goto release;
}
oi.p_pid = msg->send.nm_td->td_proc->p_pid;
error = (*so->so_proto->pr_output)(m, so, &oi);
m = NULL;
if (msg->send.nm_addr)
rp->rcb_faddr = NULL;
release:
if (m != NULL)
m_freem(m);
lwkt_replymsg(&msg->lmsg, error);
}
/* pru_sense is null */
static void
raw_ushutdown(netmsg_t msg)
{
struct rawcb *rp = sotorawcb(msg->base.nm_so);
int error;
if (rp) {
socantsendmore(msg->base.nm_so);
error = 0;
} else {
error = EINVAL;
}
lwkt_replymsg(&msg->lmsg, error);
}
static void
raw_usockaddr(netmsg_t msg)
{
struct rawcb *rp = sotorawcb(msg->base.nm_so);
int error;
if (rp == NULL) {
error = EINVAL;
} else if (rp->rcb_laddr == NULL) {
error = EINVAL;
} else {
*msg->sockaddr.nm_nam = dup_sockaddr(rp->rcb_laddr);
error = 0;
}
lwkt_replymsg(&msg->lmsg, error);
}
struct pr_usrreqs raw_usrreqs = {
.pru_abort = raw_uabort,
.pru_accept = pr_generic_notsupp,
.pru_attach = raw_uattach,
.pru_bind = raw_ubind,
.pru_connect = raw_uconnect,
.pru_connect2 = pr_generic_notsupp,
.pru_control = pr_generic_notsupp,
.pru_detach = raw_udetach,
.pru_disconnect = raw_udisconnect,
.pru_listen = pr_generic_notsupp,
.pru_peeraddr = raw_upeeraddr,
.pru_rcvd = pr_generic_notsupp,
.pru_rcvoob = pr_generic_notsupp,
.pru_send = raw_usend,
.pru_sense = pru_sense_null,
.pru_shutdown = raw_ushutdown,
.pru_sockaddr = raw_usockaddr,
.pru_sosend = sosend,
.pru_soreceive = soreceive
};