mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-05 07:59:23 +00:00
365 lines
9.6 KiB
C
365 lines
9.6 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.
|
|
*
|
|
* @(#)ns_pcb.c 8.1 (Berkeley) 6/10/93
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/protosw.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/route.h>
|
|
|
|
#include <netns/ns.h>
|
|
#include <netns/ns_if.h>
|
|
#include <netns/ns_pcb.h>
|
|
|
|
struct ns_addr zerons_addr;
|
|
|
|
ns_pcballoc(so, head)
|
|
struct socket *so;
|
|
struct nspcb *head;
|
|
{
|
|
struct mbuf *m;
|
|
register struct nspcb *nsp;
|
|
|
|
m = m_getclr(M_DONTWAIT, MT_PCB);
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
nsp = mtod(m, struct nspcb *);
|
|
nsp->nsp_socket = so;
|
|
insque(nsp, head);
|
|
so->so_pcb = (caddr_t)nsp;
|
|
return (0);
|
|
}
|
|
|
|
ns_pcbbind(nsp, nam)
|
|
register struct nspcb *nsp;
|
|
struct mbuf *nam;
|
|
{
|
|
register struct sockaddr_ns *sns;
|
|
u_short lport = 0;
|
|
|
|
if (nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr))
|
|
return (EINVAL);
|
|
if (nam == 0)
|
|
goto noname;
|
|
sns = mtod(nam, struct sockaddr_ns *);
|
|
if (nam->m_len != sizeof (*sns))
|
|
return (EINVAL);
|
|
if (!ns_nullhost(sns->sns_addr)) {
|
|
int tport = sns->sns_port;
|
|
|
|
sns->sns_port = 0; /* yech... */
|
|
if (ifa_ifwithaddr((struct sockaddr *)sns) == 0)
|
|
return (EADDRNOTAVAIL);
|
|
sns->sns_port = tport;
|
|
}
|
|
lport = sns->sns_port;
|
|
if (lport) {
|
|
u_short aport = ntohs(lport);
|
|
|
|
if (aport < NSPORT_RESERVED &&
|
|
(nsp->nsp_socket->so_state & SS_PRIV) == 0)
|
|
return (EACCES);
|
|
if (ns_pcblookup(&zerons_addr, lport, 0))
|
|
return (EADDRINUSE);
|
|
}
|
|
nsp->nsp_laddr = sns->sns_addr;
|
|
noname:
|
|
if (lport == 0)
|
|
do {
|
|
if (nspcb.nsp_lport++ < NSPORT_RESERVED)
|
|
nspcb.nsp_lport = NSPORT_RESERVED;
|
|
lport = htons(nspcb.nsp_lport);
|
|
} while (ns_pcblookup(&zerons_addr, lport, 0));
|
|
nsp->nsp_lport = lport;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Connect from a socket to a specified address.
|
|
* Both address and port must be specified in argument sns.
|
|
* If don't have a local address for this socket yet,
|
|
* then pick one.
|
|
*/
|
|
ns_pcbconnect(nsp, nam)
|
|
struct nspcb *nsp;
|
|
struct mbuf *nam;
|
|
{
|
|
struct ns_ifaddr *ia;
|
|
register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
|
|
register struct ns_addr *dst;
|
|
register struct route *ro;
|
|
struct ifnet *ifp;
|
|
|
|
if (nam->m_len != sizeof (*sns))
|
|
return (EINVAL);
|
|
if (sns->sns_family != AF_NS)
|
|
return (EAFNOSUPPORT);
|
|
if (sns->sns_port==0 || ns_nullhost(sns->sns_addr))
|
|
return (EADDRNOTAVAIL);
|
|
/*
|
|
* If we haven't bound which network number to use as ours,
|
|
* we will use the number of the outgoing interface.
|
|
* This depends on having done a routing lookup, which
|
|
* we will probably have to do anyway, so we might
|
|
* as well do it now. On the other hand if we are
|
|
* sending to multiple destinations we may have already
|
|
* done the lookup, so see if we can use the route
|
|
* from before. In any case, we only
|
|
* chose a port number once, even if sending to multiple
|
|
* destinations.
|
|
*/
|
|
ro = &nsp->nsp_route;
|
|
dst = &satons_addr(ro->ro_dst);
|
|
if (nsp->nsp_socket->so_options & SO_DONTROUTE)
|
|
goto flush;
|
|
if (!ns_neteq(nsp->nsp_lastdst, sns->sns_addr))
|
|
goto flush;
|
|
if (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr)) {
|
|
if (ro->ro_rt && ! (ro->ro_rt->rt_flags & RTF_HOST)) {
|
|
/* can patch route to avoid rtalloc */
|
|
*dst = sns->sns_addr;
|
|
} else {
|
|
flush:
|
|
if (ro->ro_rt)
|
|
RTFREE(ro->ro_rt);
|
|
ro->ro_rt = (struct rtentry *)0;
|
|
nsp->nsp_laddr.x_net = ns_zeronet;
|
|
}
|
|
}/* else cached route is ok; do nothing */
|
|
nsp->nsp_lastdst = sns->sns_addr;
|
|
if ((nsp->nsp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
|
|
(ro->ro_rt == (struct rtentry *)0 ||
|
|
ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
|
|
/* No route yet, so try to acquire one */
|
|
ro->ro_dst.sa_family = AF_NS;
|
|
ro->ro_dst.sa_len = sizeof(ro->ro_dst);
|
|
*dst = sns->sns_addr;
|
|
dst->x_port = 0;
|
|
rtalloc(ro);
|
|
}
|
|
if (ns_neteqnn(nsp->nsp_laddr.x_net, ns_zeronet)) {
|
|
/*
|
|
* If route is known or can be allocated now,
|
|
* our src addr is taken from the i/f, else punt.
|
|
*/
|
|
|
|
ia = (struct ns_ifaddr *)0;
|
|
/*
|
|
* If we found a route, use the address
|
|
* corresponding to the outgoing interface
|
|
*/
|
|
if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp))
|
|
for (ia = ns_ifaddr; ia; ia = ia->ia_next)
|
|
if (ia->ia_ifp == ifp)
|
|
break;
|
|
if (ia == 0) {
|
|
u_short fport = sns->sns_addr.x_port;
|
|
sns->sns_addr.x_port = 0;
|
|
ia = (struct ns_ifaddr *)
|
|
ifa_ifwithdstaddr((struct sockaddr *)sns);
|
|
sns->sns_addr.x_port = fport;
|
|
if (ia == 0)
|
|
ia = ns_iaonnetof(&sns->sns_addr);
|
|
if (ia == 0)
|
|
ia = ns_ifaddr;
|
|
if (ia == 0)
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net;
|
|
}
|
|
if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0))
|
|
return (EADDRINUSE);
|
|
if (ns_nullhost(nsp->nsp_laddr)) {
|
|
if (nsp->nsp_lport == 0)
|
|
(void) ns_pcbbind(nsp, (struct mbuf *)0);
|
|
nsp->nsp_laddr.x_host = ns_thishost;
|
|
}
|
|
nsp->nsp_faddr = sns->sns_addr;
|
|
/* Includes nsp->nsp_fport = sns->sns_port; */
|
|
return (0);
|
|
}
|
|
|
|
ns_pcbdisconnect(nsp)
|
|
struct nspcb *nsp;
|
|
{
|
|
|
|
nsp->nsp_faddr = zerons_addr;
|
|
if (nsp->nsp_socket->so_state & SS_NOFDREF)
|
|
ns_pcbdetach(nsp);
|
|
}
|
|
|
|
ns_pcbdetach(nsp)
|
|
struct nspcb *nsp;
|
|
{
|
|
struct socket *so = nsp->nsp_socket;
|
|
|
|
so->so_pcb = 0;
|
|
sofree(so);
|
|
if (nsp->nsp_route.ro_rt)
|
|
rtfree(nsp->nsp_route.ro_rt);
|
|
remque(nsp);
|
|
(void) m_free(dtom(nsp));
|
|
}
|
|
|
|
ns_setsockaddr(nsp, nam)
|
|
register struct nspcb *nsp;
|
|
struct mbuf *nam;
|
|
{
|
|
register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
|
|
|
|
nam->m_len = sizeof (*sns);
|
|
sns = mtod(nam, struct sockaddr_ns *);
|
|
bzero((caddr_t)sns, sizeof (*sns));
|
|
sns->sns_len = sizeof(*sns);
|
|
sns->sns_family = AF_NS;
|
|
sns->sns_addr = nsp->nsp_laddr;
|
|
}
|
|
|
|
ns_setpeeraddr(nsp, nam)
|
|
register struct nspcb *nsp;
|
|
struct mbuf *nam;
|
|
{
|
|
register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
|
|
|
|
nam->m_len = sizeof (*sns);
|
|
sns = mtod(nam, struct sockaddr_ns *);
|
|
bzero((caddr_t)sns, sizeof (*sns));
|
|
sns->sns_len = sizeof(*sns);
|
|
sns->sns_family = AF_NS;
|
|
sns->sns_addr = nsp->nsp_faddr;
|
|
}
|
|
|
|
/*
|
|
* Pass some notification to all connections of a protocol
|
|
* associated with address dst. Call the
|
|
* protocol specific routine to handle each connection.
|
|
* Also pass an extra paramter via the nspcb. (which may in fact
|
|
* be a parameter list!)
|
|
*/
|
|
ns_pcbnotify(dst, errno, notify, param)
|
|
register struct ns_addr *dst;
|
|
long param;
|
|
int errno, (*notify)();
|
|
{
|
|
register struct nspcb *nsp, *oinp;
|
|
int s = splimp();
|
|
|
|
for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) {
|
|
if (!ns_hosteq(*dst,nsp->nsp_faddr)) {
|
|
next:
|
|
nsp = nsp->nsp_next;
|
|
continue;
|
|
}
|
|
if (nsp->nsp_socket == 0)
|
|
goto next;
|
|
if (errno)
|
|
nsp->nsp_socket->so_error = errno;
|
|
oinp = nsp;
|
|
nsp = nsp->nsp_next;
|
|
oinp->nsp_notify_param = param;
|
|
(*notify)(oinp);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
#ifdef notdef
|
|
/*
|
|
* After a routing change, flush old routing
|
|
* and allocate a (hopefully) better one.
|
|
*/
|
|
ns_rtchange(nsp)
|
|
struct nspcb *nsp;
|
|
{
|
|
if (nsp->nsp_route.ro_rt) {
|
|
rtfree(nsp->nsp_route.ro_rt);
|
|
nsp->nsp_route.ro_rt = 0;
|
|
/*
|
|
* A new route can be allocated the next time
|
|
* output is attempted.
|
|
*/
|
|
}
|
|
/* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
|
|
}
|
|
#endif
|
|
|
|
struct nspcb *
|
|
ns_pcblookup(faddr, lport, wildp)
|
|
struct ns_addr *faddr;
|
|
u_short lport;
|
|
{
|
|
register struct nspcb *nsp, *match = 0;
|
|
int matchwild = 3, wildcard;
|
|
u_short fport;
|
|
|
|
fport = faddr->x_port;
|
|
for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) {
|
|
if (nsp->nsp_lport != lport)
|
|
continue;
|
|
wildcard = 0;
|
|
if (ns_nullhost(nsp->nsp_faddr)) {
|
|
if (!ns_nullhost(*faddr))
|
|
wildcard++;
|
|
} else {
|
|
if (ns_nullhost(*faddr))
|
|
wildcard++;
|
|
else {
|
|
if (!ns_hosteq(nsp->nsp_faddr, *faddr))
|
|
continue;
|
|
if (nsp->nsp_fport != fport) {
|
|
if (nsp->nsp_fport != 0)
|
|
continue;
|
|
else
|
|
wildcard++;
|
|
}
|
|
}
|
|
}
|
|
if (wildcard && wildp==0)
|
|
continue;
|
|
if (wildcard < matchwild) {
|
|
match = nsp;
|
|
matchwild = wildcard;
|
|
if (wildcard == 0)
|
|
break;
|
|
}
|
|
}
|
|
return (match);
|
|
}
|