568 lines
12 KiB
C
568 lines
12 KiB
C
/*
|
|
* Copyright (c) 1984, 1985, 1986, 1987, 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.
|
|
*
|
|
* @(#)idp_usrreq.c 8.1 (Berkeley) 6/10/93
|
|
* $Id$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/route.h>
|
|
|
|
#include <netns/ns.h>
|
|
#include <netns/ns_pcb.h>
|
|
#include <netns/ns_if.h>
|
|
#include <netns/idp.h>
|
|
#include <netns/idp_var.h>
|
|
#include <netns/ns_error.h>
|
|
|
|
/*
|
|
* IDP protocol implementation.
|
|
*/
|
|
|
|
struct sockaddr_ns idp_ns = { sizeof(idp_ns), AF_NS };
|
|
|
|
/*
|
|
* This may also be called for raw listeners.
|
|
*/
|
|
idp_input(m, nsp)
|
|
struct mbuf *m;
|
|
register struct nspcb *nsp;
|
|
{
|
|
register struct idp *idp = mtod(m, struct idp *);
|
|
struct ifnet *ifp = m->m_pkthdr.rcvif;
|
|
|
|
if (nsp==0)
|
|
panic("No nspcb");
|
|
/*
|
|
* Construct sockaddr format source address.
|
|
* Stuff source address and datagram in user buffer.
|
|
*/
|
|
idp_ns.sns_addr = idp->idp_sna;
|
|
if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
|
|
register struct ifaddr *ifa;
|
|
|
|
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
|
|
if (ifa->ifa_addr->sa_family == AF_NS) {
|
|
idp_ns.sns_addr.x_net =
|
|
IA_SNS(ifa)->sns_addr.x_net;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
nsp->nsp_rpt = idp->idp_pt;
|
|
if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
|
|
m->m_len -= sizeof (struct idp);
|
|
m->m_pkthdr.len -= sizeof (struct idp);
|
|
m->m_data += sizeof (struct idp);
|
|
}
|
|
if (sbappendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns,
|
|
m, (struct mbuf *)0) == 0)
|
|
goto bad;
|
|
sorwakeup(nsp->nsp_socket);
|
|
return;
|
|
bad:
|
|
m_freem(m);
|
|
}
|
|
|
|
idp_abort(nsp)
|
|
struct nspcb *nsp;
|
|
{
|
|
struct socket *so = nsp->nsp_socket;
|
|
|
|
ns_pcbdisconnect(nsp);
|
|
soisdisconnected(so);
|
|
}
|
|
/*
|
|
* Drop connection, reporting
|
|
* the specified error.
|
|
*/
|
|
struct nspcb *
|
|
idp_drop(nsp, errno)
|
|
register struct nspcb *nsp;
|
|
int errno;
|
|
{
|
|
struct socket *so = nsp->nsp_socket;
|
|
|
|
/*
|
|
* someday, in the xerox world
|
|
* we will generate error protocol packets
|
|
* announcing that the socket has gone away.
|
|
*/
|
|
/*if (TCPS_HAVERCVDSYN(tp->t_state)) {
|
|
tp->t_state = TCPS_CLOSED;
|
|
(void) tcp_output(tp);
|
|
}*/
|
|
so->so_error = errno;
|
|
ns_pcbdisconnect(nsp);
|
|
soisdisconnected(so);
|
|
}
|
|
|
|
int noIdpRoute;
|
|
idp_output(nsp, m0)
|
|
struct nspcb *nsp;
|
|
struct mbuf *m0;
|
|
{
|
|
register struct mbuf *m;
|
|
register struct idp *idp;
|
|
register struct socket *so;
|
|
register int len = 0;
|
|
register struct route *ro;
|
|
struct mbuf *mprev;
|
|
extern int idpcksum;
|
|
|
|
/*
|
|
* Calculate data length.
|
|
*/
|
|
for (m = m0; m; m = m->m_next) {
|
|
mprev = m;
|
|
len += m->m_len;
|
|
}
|
|
/*
|
|
* Make sure packet is actually of even length.
|
|
*/
|
|
|
|
if (len & 1) {
|
|
m = mprev;
|
|
if ((m->m_flags & M_EXT) == 0 &&
|
|
(m->m_len + m->m_data < &m->m_dat[MLEN])) {
|
|
m->m_len++;
|
|
} else {
|
|
struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
|
|
|
|
if (m1 == 0) {
|
|
m_freem(m0);
|
|
return (ENOBUFS);
|
|
}
|
|
m1->m_len = 1;
|
|
* mtod(m1, char *) = 0;
|
|
m->m_next = m1;
|
|
}
|
|
m0->m_pkthdr.len++;
|
|
}
|
|
|
|
/*
|
|
* Fill in mbuf with extended IDP header
|
|
* and addresses and length put into network format.
|
|
*/
|
|
m = m0;
|
|
if (nsp->nsp_flags & NSP_RAWOUT) {
|
|
idp = mtod(m, struct idp *);
|
|
} else {
|
|
M_PREPEND(m, sizeof (struct idp), M_DONTWAIT);
|
|
if (m == 0)
|
|
return (ENOBUFS);
|
|
idp = mtod(m, struct idp *);
|
|
idp->idp_tc = 0;
|
|
idp->idp_pt = nsp->nsp_dpt;
|
|
idp->idp_sna = nsp->nsp_laddr;
|
|
idp->idp_dna = nsp->nsp_faddr;
|
|
len += sizeof (struct idp);
|
|
}
|
|
|
|
idp->idp_len = htons((u_short)len);
|
|
|
|
if (idpcksum) {
|
|
idp->idp_sum = 0;
|
|
len = ((len - 1) | 1) + 1;
|
|
idp->idp_sum = ns_cksum(m, len);
|
|
} else
|
|
idp->idp_sum = 0xffff;
|
|
|
|
/*
|
|
* Output datagram.
|
|
*/
|
|
so = nsp->nsp_socket;
|
|
if (so->so_options & SO_DONTROUTE)
|
|
return (ns_output(m, (struct route *)0,
|
|
(so->so_options & SO_BROADCAST) | NS_ROUTETOIF));
|
|
/*
|
|
* Use cached route for previous datagram if
|
|
* possible. If the previous net was the same
|
|
* and the interface was a broadcast medium, or
|
|
* if the previous destination was identical,
|
|
* then we are ok.
|
|
*
|
|
* NB: We don't handle broadcasts because that
|
|
* would require 3 subroutine calls.
|
|
*/
|
|
ro = &nsp->nsp_route;
|
|
#ifdef ancient_history
|
|
/*
|
|
* I think that this will all be handled in ns_pcbconnect!
|
|
*/
|
|
if (ro->ro_rt) {
|
|
if(ns_neteq(nsp->nsp_lastdst, idp->idp_dna)) {
|
|
/*
|
|
* This assumes we have no GH type routes
|
|
*/
|
|
if (ro->ro_rt->rt_flags & RTF_HOST) {
|
|
if (!ns_hosteq(nsp->nsp_lastdst, idp->idp_dna))
|
|
goto re_route;
|
|
|
|
}
|
|
if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
|
|
register struct ns_addr *dst =
|
|
&satons_addr(ro->ro_dst);
|
|
dst->x_host = idp->idp_dna.x_host;
|
|
}
|
|
/*
|
|
* Otherwise, we go through the same gateway
|
|
* and dst is already set up.
|
|
*/
|
|
} else {
|
|
re_route:
|
|
RTFREE(ro->ro_rt);
|
|
ro->ro_rt = (struct rtentry *)0;
|
|
}
|
|
}
|
|
nsp->nsp_lastdst = idp->idp_dna;
|
|
#endif /* ancient_history */
|
|
if (noIdpRoute) ro = 0;
|
|
return (ns_output(m, ro, so->so_options & SO_BROADCAST));
|
|
}
|
|
/* ARGSUSED */
|
|
idp_ctloutput(req, so, level, name, value)
|
|
int req, level;
|
|
struct socket *so;
|
|
int name;
|
|
struct mbuf **value;
|
|
{
|
|
register struct mbuf *m;
|
|
struct nspcb *nsp = sotonspcb(so);
|
|
int mask, error = 0;
|
|
extern long ns_pexseq;
|
|
|
|
if (nsp == NULL)
|
|
return (EINVAL);
|
|
|
|
switch (req) {
|
|
|
|
case PRCO_GETOPT:
|
|
if (value==NULL)
|
|
return (EINVAL);
|
|
m = m_get(M_DONTWAIT, MT_DATA);
|
|
if (m==NULL)
|
|
return (ENOBUFS);
|
|
switch (name) {
|
|
|
|
case SO_ALL_PACKETS:
|
|
mask = NSP_ALL_PACKETS;
|
|
goto get_flags;
|
|
|
|
case SO_HEADERS_ON_INPUT:
|
|
mask = NSP_RAWIN;
|
|
goto get_flags;
|
|
|
|
case SO_HEADERS_ON_OUTPUT:
|
|
mask = NSP_RAWOUT;
|
|
get_flags:
|
|
m->m_len = sizeof(short);
|
|
*mtod(m, short *) = nsp->nsp_flags & mask;
|
|
break;
|
|
|
|
case SO_DEFAULT_HEADERS:
|
|
m->m_len = sizeof(struct idp);
|
|
{
|
|
register struct idp *idp = mtod(m, struct idp *);
|
|
idp->idp_len = 0;
|
|
idp->idp_sum = 0;
|
|
idp->idp_tc = 0;
|
|
idp->idp_pt = nsp->nsp_dpt;
|
|
idp->idp_dna = nsp->nsp_faddr;
|
|
idp->idp_sna = nsp->nsp_laddr;
|
|
}
|
|
break;
|
|
|
|
case SO_SEQNO:
|
|
m->m_len = sizeof(long);
|
|
*mtod(m, long *) = ns_pexseq++;
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
*value = m;
|
|
break;
|
|
|
|
case PRCO_SETOPT:
|
|
switch (name) {
|
|
int *ok;
|
|
|
|
case SO_ALL_PACKETS:
|
|
mask = NSP_ALL_PACKETS;
|
|
goto set_head;
|
|
|
|
case SO_HEADERS_ON_INPUT:
|
|
mask = NSP_RAWIN;
|
|
goto set_head;
|
|
|
|
case SO_HEADERS_ON_OUTPUT:
|
|
mask = NSP_RAWOUT;
|
|
set_head:
|
|
if (value && *value) {
|
|
ok = mtod(*value, int *);
|
|
if (*ok)
|
|
nsp->nsp_flags |= mask;
|
|
else
|
|
nsp->nsp_flags &= ~mask;
|
|
} else error = EINVAL;
|
|
break;
|
|
|
|
case SO_DEFAULT_HEADERS:
|
|
{
|
|
register struct idp *idp
|
|
= mtod(*value, struct idp *);
|
|
nsp->nsp_dpt = idp->idp_pt;
|
|
}
|
|
break;
|
|
#ifdef NSIP
|
|
|
|
case SO_NSIP_ROUTE:
|
|
error = nsip_route(*value);
|
|
break;
|
|
#endif /* NSIP */
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
if (value && *value)
|
|
m_freem(*value);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
idp_usrreq(so, req, m, nam, control)
|
|
struct socket *so;
|
|
int req;
|
|
struct mbuf *m, *nam, *control;
|
|
{
|
|
struct nspcb *nsp = sotonspcb(so);
|
|
int error = 0;
|
|
|
|
if (req == PRU_CONTROL)
|
|
return (ns_control(so, (int)m, (caddr_t)nam,
|
|
(struct ifnet *)control));
|
|
if (control && control->m_len) {
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
if (nsp == NULL && req != PRU_ATTACH) {
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
switch (req) {
|
|
|
|
case PRU_ATTACH:
|
|
if (nsp != NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
error = ns_pcballoc(so, &nspcb);
|
|
if (error)
|
|
break;
|
|
error = soreserve(so, (u_long) 2048, (u_long) 2048);
|
|
if (error)
|
|
break;
|
|
break;
|
|
|
|
case PRU_DETACH:
|
|
if (nsp == NULL) {
|
|
error = ENOTCONN;
|
|
break;
|
|
}
|
|
ns_pcbdetach(nsp);
|
|
break;
|
|
|
|
case PRU_BIND:
|
|
error = ns_pcbbind(nsp, nam);
|
|
break;
|
|
|
|
case PRU_LISTEN:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_CONNECT:
|
|
if (!ns_nullhost(nsp->nsp_faddr)) {
|
|
error = EISCONN;
|
|
break;
|
|
}
|
|
error = ns_pcbconnect(nsp, nam);
|
|
if (error == 0)
|
|
soisconnected(so);
|
|
break;
|
|
|
|
case PRU_CONNECT2:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_ACCEPT:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_DISCONNECT:
|
|
if (ns_nullhost(nsp->nsp_faddr)) {
|
|
error = ENOTCONN;
|
|
break;
|
|
}
|
|
ns_pcbdisconnect(nsp);
|
|
soisdisconnected(so);
|
|
break;
|
|
|
|
case PRU_SHUTDOWN:
|
|
socantsendmore(so);
|
|
break;
|
|
|
|
case PRU_SEND:
|
|
{
|
|
struct ns_addr laddr;
|
|
int s;
|
|
|
|
if (nam) {
|
|
laddr = nsp->nsp_laddr;
|
|
if (!ns_nullhost(nsp->nsp_faddr)) {
|
|
error = EISCONN;
|
|
break;
|
|
}
|
|
/*
|
|
* Must block input while temporarily connected.
|
|
*/
|
|
s = splnet();
|
|
error = ns_pcbconnect(nsp, nam);
|
|
if (error) {
|
|
splx(s);
|
|
break;
|
|
}
|
|
} else {
|
|
if (ns_nullhost(nsp->nsp_faddr)) {
|
|
error = ENOTCONN;
|
|
break;
|
|
}
|
|
}
|
|
error = idp_output(nsp, m);
|
|
m = NULL;
|
|
if (nam) {
|
|
ns_pcbdisconnect(nsp);
|
|
splx(s);
|
|
nsp->nsp_laddr.x_host = laddr.x_host;
|
|
nsp->nsp_laddr.x_port = laddr.x_port;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PRU_ABORT:
|
|
ns_pcbdetach(nsp);
|
|
sofree(so);
|
|
soisdisconnected(so);
|
|
break;
|
|
|
|
case PRU_SOCKADDR:
|
|
ns_setsockaddr(nsp, nam);
|
|
break;
|
|
|
|
case PRU_PEERADDR:
|
|
ns_setpeeraddr(nsp, nam);
|
|
break;
|
|
|
|
case PRU_SENSE:
|
|
/*
|
|
* stat: don't bother with a blocksize.
|
|
*/
|
|
return (0);
|
|
|
|
case PRU_SENDOOB:
|
|
case PRU_FASTTIMO:
|
|
case PRU_SLOWTIMO:
|
|
case PRU_PROTORCV:
|
|
case PRU_PROTOSEND:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_CONTROL:
|
|
case PRU_RCVD:
|
|
case PRU_RCVOOB:
|
|
return (EOPNOTSUPP); /* do not free mbuf's */
|
|
|
|
default:
|
|
panic("idp_usrreq");
|
|
}
|
|
release:
|
|
if (control != NULL)
|
|
m_freem(control);
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
/*ARGSUSED*/
|
|
idp_raw_usrreq(so, req, m, nam, control)
|
|
struct socket *so;
|
|
int req;
|
|
struct mbuf *m, *nam, *control;
|
|
{
|
|
int error = 0;
|
|
struct nspcb *nsp = sotonspcb(so);
|
|
extern struct nspcb nsrawpcb;
|
|
|
|
switch (req) {
|
|
|
|
case PRU_ATTACH:
|
|
|
|
if (!(so->so_state & SS_PRIV) || (nsp != NULL)) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
error = ns_pcballoc(so, &nsrawpcb);
|
|
if (error)
|
|
break;
|
|
error = soreserve(so, (u_long) 2048, (u_long) 2048);
|
|
if (error)
|
|
break;
|
|
nsp = sotonspcb(so);
|
|
nsp->nsp_faddr.x_host = ns_broadhost;
|
|
nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
|
|
break;
|
|
default:
|
|
error = idp_usrreq(so, req, m, nam, control);
|
|
}
|
|
return (error);
|
|
}
|
|
|