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b1e4abd246
vnodes. This will hopefully serve as a base from which we can expand the MP code. We currently do not attempt to obtain any mutex or SX locks, but the door is open to add them when we nail down exactly how that part of it is going to work.
365 lines
9.6 KiB
C
365 lines
9.6 KiB
C
/*
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* Copyright (c) 1984, 1985, 1986, 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ns_pcb.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/errno.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#include <netns/ns_pcb.h>
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struct ns_addr zerons_addr;
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ns_pcballoc(so, head)
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struct socket *so;
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struct nspcb *head;
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{
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struct mbuf *m;
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register struct nspcb *nsp;
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m = m_getclr(M_DONTWAIT, MT_PCB);
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if (m == NULL)
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return (ENOBUFS);
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nsp = mtod(m, struct nspcb *);
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nsp->nsp_socket = so;
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insque(nsp, head);
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so->so_pcb = (caddr_t)nsp;
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return (0);
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}
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ns_pcbbind(nsp, nam)
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register struct nspcb *nsp;
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struct mbuf *nam;
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{
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register struct sockaddr_ns *sns;
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u_short lport = 0;
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if (nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr))
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return (EINVAL);
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if (nam == 0)
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goto noname;
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sns = mtod(nam, struct sockaddr_ns *);
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if (nam->m_len != sizeof (*sns))
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return (EINVAL);
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if (!ns_nullhost(sns->sns_addr)) {
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int tport = sns->sns_port;
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sns->sns_port = 0; /* yech... */
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if (ifa_ifwithaddr((struct sockaddr *)sns) == 0)
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return (EADDRNOTAVAIL);
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sns->sns_port = tport;
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}
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lport = sns->sns_port;
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if (lport) {
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u_short aport = ntohs(lport);
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if (aport < NSPORT_RESERVED &&
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(nsp->nsp_socket->so_state & SS_PRIV) == 0)
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return (EACCES);
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if (ns_pcblookup(&zerons_addr, lport, 0))
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return (EADDRINUSE);
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}
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nsp->nsp_laddr = sns->sns_addr;
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noname:
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if (lport == 0)
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do {
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if (nspcb.nsp_lport++ < NSPORT_RESERVED)
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nspcb.nsp_lport = NSPORT_RESERVED;
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lport = htons(nspcb.nsp_lport);
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} while (ns_pcblookup(&zerons_addr, lport, 0));
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nsp->nsp_lport = lport;
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return (0);
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}
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/*
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* Connect from a socket to a specified address.
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* Both address and port must be specified in argument sns.
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* If don't have a local address for this socket yet,
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* then pick one.
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*/
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ns_pcbconnect(nsp, nam)
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struct nspcb *nsp;
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struct mbuf *nam;
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{
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struct ns_ifaddr *ia;
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register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
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register struct ns_addr *dst;
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register struct route *ro;
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struct ifnet *ifp;
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if (nam->m_len != sizeof (*sns))
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return (EINVAL);
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if (sns->sns_family != AF_NS)
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return (EAFNOSUPPORT);
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if (sns->sns_port==0 || ns_nullhost(sns->sns_addr))
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return (EADDRNOTAVAIL);
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/*
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* If we haven't bound which network number to use as ours,
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* we will use the number of the outgoing interface.
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* This depends on having done a routing lookup, which
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* we will probably have to do anyway, so we might
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* as well do it now. On the other hand if we are
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* sending to multiple destinations we may have already
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* done the lookup, so see if we can use the route
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* from before. In any case, we only
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* chose a port number once, even if sending to multiple
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* destinations.
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*/
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ro = &nsp->nsp_route;
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dst = &satons_addr(ro->ro_dst);
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if (nsp->nsp_socket->so_options & SO_DONTROUTE)
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goto flush;
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if (!ns_neteq(nsp->nsp_lastdst, sns->sns_addr))
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goto flush;
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if (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr)) {
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if (ro->ro_rt && ! (ro->ro_rt->rt_flags & RTF_HOST)) {
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/* can patch route to avoid rtalloc */
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*dst = sns->sns_addr;
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} else {
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flush:
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if (ro->ro_rt)
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RTFREE(ro->ro_rt);
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ro->ro_rt = (struct rtentry *)0;
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nsp->nsp_laddr.x_net = ns_zeronet;
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}
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}/* else cached route is ok; do nothing */
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nsp->nsp_lastdst = sns->sns_addr;
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if ((nsp->nsp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
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(ro->ro_rt == (struct rtentry *)0 ||
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ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
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/* No route yet, so try to acquire one */
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ro->ro_dst.sa_family = AF_NS;
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ro->ro_dst.sa_len = sizeof(ro->ro_dst);
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*dst = sns->sns_addr;
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dst->x_port = 0;
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rtalloc(ro);
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}
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if (ns_neteqnn(nsp->nsp_laddr.x_net, ns_zeronet)) {
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/*
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* If route is known or can be allocated now,
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* our src addr is taken from the i/f, else punt.
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*/
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ia = (struct ns_ifaddr *)0;
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/*
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* If we found a route, use the address
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* corresponding to the outgoing interface
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*/
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if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp))
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for (ia = ns_ifaddr; ia; ia = ia->ia_next)
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if (ia->ia_ifp == ifp)
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break;
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if (ia == 0) {
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u_short fport = sns->sns_addr.x_port;
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sns->sns_addr.x_port = 0;
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ia = (struct ns_ifaddr *)
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ifa_ifwithdstaddr((struct sockaddr *)sns);
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sns->sns_addr.x_port = fport;
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if (ia == 0)
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ia = ns_iaonnetof(&sns->sns_addr);
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if (ia == 0)
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ia = ns_ifaddr;
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if (ia == 0)
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return (EADDRNOTAVAIL);
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}
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nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net;
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}
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if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0))
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return (EADDRINUSE);
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if (ns_nullhost(nsp->nsp_laddr)) {
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if (nsp->nsp_lport == 0)
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(void) ns_pcbbind(nsp, (struct mbuf *)0);
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nsp->nsp_laddr.x_host = ns_thishost;
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}
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nsp->nsp_faddr = sns->sns_addr;
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/* Includes nsp->nsp_fport = sns->sns_port; */
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return (0);
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}
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ns_pcbdisconnect(nsp)
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struct nspcb *nsp;
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{
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nsp->nsp_faddr = zerons_addr;
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if (nsp->nsp_socket->so_state & SS_NOFDREF)
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ns_pcbdetach(nsp);
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}
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ns_pcbdetach(nsp)
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struct nspcb *nsp;
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{
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struct socket *so = nsp->nsp_socket;
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so->so_pcb = 0;
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sotryfree(so);
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if (nsp->nsp_route.ro_rt)
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rtfree(nsp->nsp_route.ro_rt);
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remque(nsp);
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(void) m_free(dtom(nsp));
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}
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ns_setsockaddr(nsp, nam)
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register struct nspcb *nsp;
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struct mbuf *nam;
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{
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register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
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nam->m_len = sizeof (*sns);
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sns = mtod(nam, struct sockaddr_ns *);
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bzero((caddr_t)sns, sizeof (*sns));
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sns->sns_len = sizeof(*sns);
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sns->sns_family = AF_NS;
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sns->sns_addr = nsp->nsp_laddr;
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}
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ns_setpeeraddr(nsp, nam)
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register struct nspcb *nsp;
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struct mbuf *nam;
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{
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register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
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nam->m_len = sizeof (*sns);
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sns = mtod(nam, struct sockaddr_ns *);
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bzero((caddr_t)sns, sizeof (*sns));
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sns->sns_len = sizeof(*sns);
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sns->sns_family = AF_NS;
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sns->sns_addr = nsp->nsp_faddr;
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}
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/*
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* Pass some notification to all connections of a protocol
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* associated with address dst. Call the
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* protocol specific routine to handle each connection.
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* Also pass an extra paramter via the nspcb. (which may in fact
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* be a parameter list!)
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*/
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ns_pcbnotify(dst, errno, notify, param)
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register struct ns_addr *dst;
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long param;
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int errno, (*notify)();
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{
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register struct nspcb *nsp, *oinp;
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int s = splimp();
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for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) {
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if (!ns_hosteq(*dst,nsp->nsp_faddr)) {
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next:
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nsp = nsp->nsp_next;
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continue;
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}
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if (nsp->nsp_socket == 0)
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goto next;
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if (errno)
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nsp->nsp_socket->so_error = errno;
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oinp = nsp;
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nsp = nsp->nsp_next;
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oinp->nsp_notify_param = param;
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(*notify)(oinp);
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}
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splx(s);
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}
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#ifdef notdef
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/*
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* After a routing change, flush old routing
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* and allocate a (hopefully) better one.
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*/
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ns_rtchange(nsp)
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struct nspcb *nsp;
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{
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if (nsp->nsp_route.ro_rt) {
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rtfree(nsp->nsp_route.ro_rt);
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nsp->nsp_route.ro_rt = 0;
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/*
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* A new route can be allocated the next time
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* output is attempted.
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*/
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}
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/* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
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}
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#endif
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struct nspcb *
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ns_pcblookup(faddr, lport, wildp)
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struct ns_addr *faddr;
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u_short lport;
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{
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register struct nspcb *nsp, *match = 0;
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int matchwild = 3, wildcard;
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u_short fport;
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fport = faddr->x_port;
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for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) {
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if (nsp->nsp_lport != lport)
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continue;
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wildcard = 0;
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if (ns_nullhost(nsp->nsp_faddr)) {
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if (!ns_nullhost(*faddr))
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wildcard++;
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} else {
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if (ns_nullhost(*faddr))
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wildcard++;
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else {
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if (!ns_hosteq(nsp->nsp_faddr, *faddr))
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continue;
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if (nsp->nsp_fport != fport) {
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if (nsp->nsp_fport != 0)
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continue;
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else
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wildcard++;
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}
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}
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}
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if (wildcard && wildp==0)
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continue;
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if (wildcard < matchwild) {
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match = nsp;
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matchwild = wildcard;
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if (wildcard == 0)
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break;
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}
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}
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return (match);
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}
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