556 lines
13 KiB
C
556 lines
13 KiB
C
/* $NetBSD: ddp_usrreq.c,v 1.2 1997/04/29 13:44:47 christos Exp $ */
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/*
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* Copyright (c) 1990,1991 Regents of The University of Michigan.
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* All Rights Reserved.
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation, and that the name of The University
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* of Michigan not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. This software is supplied as is without expressed or
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* implied warranties of any kind.
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*
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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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*
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* Research Systems Unix Group
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* The University of Michigan
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* c/o Wesley Craig
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* 535 W. William Street
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* Ann Arbor, Michigan
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* +1-313-764-2278
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* netatalk@umich.edu
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*/
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#include <sys/errno.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/mbuf.h>
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#include <sys/ioctl.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 <net/if_ether.h>
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#include <netinet/in.h>
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/ddp_var.h>
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#include <netatalk/aarp.h>
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#include <netatalk/at_extern.h>
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static void at_pcbdisconnect __P((struct ddpcb *));
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static void at_sockaddr __P((struct ddpcb *, struct mbuf *));
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static int at_pcbsetaddr __P((struct ddpcb *, struct mbuf *, struct proc *));
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static int at_pcbconnect __P((struct ddpcb *, struct mbuf *, struct proc *));
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static void at_pcbdetach __P((struct socket *, struct ddpcb *));
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static int at_pcballoc __P((struct socket *));
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struct ddpcb *ddp_ports[ATPORT_LAST];
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struct ddpcb *ddpcb = NULL;
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struct at_ifaddrhead at_ifaddr; /* Here as inited in this file */
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u_long ddp_sendspace = DDP_MAXSZ; /* Max ddp size + 1 (ddp_type) */
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u_long ddp_recvspace = 25 * (587 + sizeof(struct sockaddr_at));
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/* ARGSUSED */
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int
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ddp_usrreq(so, req, m, addr, rights, p)
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struct socket *so;
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int req;
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struct mbuf *m;
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struct mbuf *addr;
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struct mbuf *rights;
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struct proc *p;
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{
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struct ddpcb *ddp;
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int error = 0;
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ddp = sotoddpcb(so);
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if (req == PRU_CONTROL) {
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return (at_control((long) m, (caddr_t) addr,
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(struct ifnet *) rights, (struct proc *) p));
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}
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if (rights && rights->m_len) {
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error = EINVAL;
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goto release;
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}
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if (ddp == NULL && req != PRU_ATTACH) {
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error = EINVAL;
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goto release;
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}
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switch (req) {
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case PRU_ATTACH:
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if (ddp != NULL) {
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error = EINVAL;
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break;
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}
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if ((error = at_pcballoc(so)) != 0) {
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break;
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}
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error = soreserve(so, ddp_sendspace, ddp_recvspace);
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break;
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case PRU_DETACH:
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at_pcbdetach(so, ddp);
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break;
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case PRU_BIND:
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error = at_pcbsetaddr(ddp, addr, p);
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break;
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case PRU_SOCKADDR:
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at_sockaddr(ddp, addr);
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break;
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case PRU_CONNECT:
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if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
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error = EISCONN;
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break;
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}
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error = at_pcbconnect(ddp, addr, p);
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if (error == 0)
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soisconnected(so);
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break;
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case PRU_DISCONNECT:
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if (ddp->ddp_fsat.sat_addr.s_node == ATADDR_ANYNODE) {
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error = ENOTCONN;
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break;
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}
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at_pcbdisconnect(ddp);
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soisdisconnected(so);
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break;
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case PRU_SHUTDOWN:
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socantsendmore(so);
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break;
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case PRU_SEND:{
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int s = 0;
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if (addr) {
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if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
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error = EISCONN;
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break;
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}
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s = splnet();
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error = at_pcbconnect(ddp, addr, p);
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if (error) {
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splx(s);
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break;
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}
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} else {
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if (ddp->ddp_fsat.sat_port == ATADDR_ANYPORT) {
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error = ENOTCONN;
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break;
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}
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}
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error = ddp_output(m, ddp);
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m = NULL;
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if (addr) {
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at_pcbdisconnect(ddp);
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splx(s);
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}
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}
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break;
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case PRU_ABORT:
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soisdisconnected(so);
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at_pcbdetach(so, ddp);
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break;
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case PRU_LISTEN:
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case PRU_CONNECT2:
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case PRU_ACCEPT:
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case PRU_SENDOOB:
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case PRU_FASTTIMO:
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case PRU_SLOWTIMO:
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case PRU_PROTORCV:
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case PRU_PROTOSEND:
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error = EOPNOTSUPP;
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break;
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case PRU_RCVD:
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case PRU_RCVOOB:
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/*
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* Don't mfree. Good architecture...
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*/
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return (EOPNOTSUPP);
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case PRU_SENSE:
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/*
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* 1. Don't return block size.
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* 2. Don't mfree.
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*/
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return (0);
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default:
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error = EOPNOTSUPP;
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}
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release:
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if (m != NULL) {
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m_freem(m);
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}
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return (error);
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}
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static void
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at_sockaddr(ddp, addr)
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struct ddpcb *ddp;
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struct mbuf *addr;
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{
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struct sockaddr_at *sat;
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addr->m_len = sizeof(struct sockaddr_at);
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sat = mtod(addr, struct sockaddr_at *);
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*sat = ddp->ddp_lsat;
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}
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static int
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at_pcbsetaddr(ddp, addr, p)
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struct ddpcb *ddp;
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struct mbuf *addr;
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struct proc *p;
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{
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struct sockaddr_at lsat, *sat;
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struct at_ifaddr *aa;
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struct ddpcb *ddpp;
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if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT) { /* shouldn't be bound */
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return (EINVAL);
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}
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if (addr != 0) { /* validate passed address */
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sat = mtod(addr, struct sockaddr_at *);
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if (addr->m_len != sizeof(*sat))
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return (EINVAL);
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if (sat->sat_family != AF_APPLETALK)
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return (EAFNOSUPPORT);
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if (sat->sat_addr.s_node != ATADDR_ANYNODE ||
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sat->sat_addr.s_net != ATADDR_ANYNET) {
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for (aa = at_ifaddr.tqh_first; aa;
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aa = aa->aa_list.tqe_next) {
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if ((sat->sat_addr.s_net ==
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AA_SAT(aa)->sat_addr.s_net) &&
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(sat->sat_addr.s_node ==
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AA_SAT(aa)->sat_addr.s_node))
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break;
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}
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if (!aa)
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return (EADDRNOTAVAIL);
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}
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if (sat->sat_port != ATADDR_ANYPORT) {
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if (sat->sat_port < ATPORT_FIRST ||
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sat->sat_port >= ATPORT_LAST)
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return (EINVAL);
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if (sat->sat_port < ATPORT_RESERVED &&
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suser(p->p_ucred, &p->p_acflag))
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return (EACCES);
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}
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} else {
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bzero((caddr_t) & lsat, sizeof(struct sockaddr_at));
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lsat.sat_len = sizeof(struct sockaddr_at);
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lsat.sat_addr.s_node = ATADDR_ANYNODE;
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lsat.sat_addr.s_net = ATADDR_ANYNET;
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lsat.sat_family = AF_APPLETALK;
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sat = &lsat;
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}
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if (sat->sat_addr.s_node == ATADDR_ANYNODE &&
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sat->sat_addr.s_net == ATADDR_ANYNET) {
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if (at_ifaddr.tqh_first == NULL)
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return (EADDRNOTAVAIL);
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sat->sat_addr = AA_SAT(at_ifaddr.tqh_first)->sat_addr;
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}
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ddp->ddp_lsat = *sat;
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/*
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* Choose port.
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*/
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if (sat->sat_port == ATADDR_ANYPORT) {
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for (sat->sat_port = ATPORT_RESERVED;
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sat->sat_port < ATPORT_LAST; sat->sat_port++) {
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if (ddp_ports[sat->sat_port - 1] == 0)
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break;
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}
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if (sat->sat_port == ATPORT_LAST) {
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return (EADDRNOTAVAIL);
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}
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ddp->ddp_lsat.sat_port = sat->sat_port;
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ddp_ports[sat->sat_port - 1] = ddp;
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} else {
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for (ddpp = ddp_ports[sat->sat_port - 1]; ddpp;
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ddpp = ddpp->ddp_pnext) {
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if (ddpp->ddp_lsat.sat_addr.s_net ==
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sat->sat_addr.s_net &&
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ddpp->ddp_lsat.sat_addr.s_node ==
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sat->sat_addr.s_node)
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break;
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}
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if (ddpp != NULL)
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return (EADDRINUSE);
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ddp->ddp_pnext = ddp_ports[sat->sat_port - 1];
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ddp_ports[sat->sat_port - 1] = ddp;
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if (ddp->ddp_pnext)
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ddp->ddp_pnext->ddp_pprev = ddp;
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}
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return 0;
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}
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static int
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at_pcbconnect(ddp, addr, p)
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struct ddpcb *ddp;
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struct mbuf *addr;
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struct proc *p;
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{
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struct sockaddr_at *sat = mtod(addr, struct sockaddr_at *);
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struct route *ro;
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struct at_ifaddr *aa = 0;
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struct ifnet *ifp;
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u_short hintnet = 0, net;
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if (addr->m_len != sizeof(*sat))
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return (EINVAL);
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if (sat->sat_family != AF_APPLETALK) {
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return (EAFNOSUPPORT);
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}
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/*
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* Under phase 2, network 0 means "the network". We take "the
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* network" to mean the network the control block is bound to.
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* If the control block is not bound, there is an error.
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*/
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if (sat->sat_addr.s_net == ATADDR_ANYNET
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&& sat->sat_addr.s_node != ATADDR_ANYNODE) {
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if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) {
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return (EADDRNOTAVAIL);
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}
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hintnet = ddp->ddp_lsat.sat_addr.s_net;
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}
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ro = &ddp->ddp_route;
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/*
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* If we've got an old route for this pcb, check that it is valid.
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* If we've changed our address, we may have an old "good looking"
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* route here. Attempt to detect it.
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*/
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if (ro->ro_rt) {
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if (hintnet) {
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net = hintnet;
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} else {
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net = sat->sat_addr.s_net;
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}
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aa = 0;
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if ((ifp = ro->ro_rt->rt_ifp) != NULL) {
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for (aa = at_ifaddr.tqh_first; aa;
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aa = aa->aa_list.tqe_next) {
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if (aa->aa_ifp == ifp &&
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ntohs(net) >= ntohs(aa->aa_firstnet) &&
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ntohs(net) <= ntohs(aa->aa_lastnet)) {
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break;
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}
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}
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}
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if (aa == NULL || (satosat(&ro->ro_dst)->sat_addr.s_net !=
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(hintnet ? hintnet : sat->sat_addr.s_net) ||
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satosat(&ro->ro_dst)->sat_addr.s_node !=
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sat->sat_addr.s_node)) {
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RTFREE(ro->ro_rt);
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ro->ro_rt = (struct rtentry *) 0;
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}
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}
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/*
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* If we've got no route for this interface, try to find one.
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*/
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if (ro->ro_rt == (struct rtentry *) 0 ||
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ro->ro_rt->rt_ifp == (struct ifnet *) 0) {
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bzero(&ro->ro_dst, sizeof(struct sockaddr_at));
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ro->ro_dst.sa_len = sizeof(struct sockaddr_at);
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ro->ro_dst.sa_family = AF_APPLETALK;
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if (hintnet) {
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satosat(&ro->ro_dst)->sat_addr.s_net = hintnet;
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} else {
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satosat(&ro->ro_dst)->sat_addr.s_net =
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sat->sat_addr.s_net;
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}
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satosat(&ro->ro_dst)->sat_addr.s_node = sat->sat_addr.s_node;
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rtalloc(ro);
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}
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/*
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* Make sure any route that we have has a valid interface.
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*/
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aa = 0;
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if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp)) {
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for (aa = at_ifaddr.tqh_first; aa; aa = aa->aa_list.tqe_next) {
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if (aa->aa_ifp == ifp) {
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break;
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}
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}
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}
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if (aa == 0) {
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return (ENETUNREACH);
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}
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ddp->ddp_fsat = *sat;
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if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) {
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return (at_pcbsetaddr(ddp, (struct mbuf *) 0, p));
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}
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return (0);
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}
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static void
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at_pcbdisconnect(ddp)
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struct ddpcb *ddp;
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{
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ddp->ddp_fsat.sat_addr.s_net = ATADDR_ANYNET;
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ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE;
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ddp->ddp_fsat.sat_port = ATADDR_ANYPORT;
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}
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static int
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at_pcballoc(so)
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struct socket *so;
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{
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struct ddpcb *ddp;
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MALLOC(ddp, struct ddpcb *, sizeof(*ddp), M_PCB, M_WAIT);
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if (!ddp)
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panic("at_pcballoc");
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bzero((caddr_t) ddp, sizeof *ddp);
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ddp->ddp_lsat.sat_port = ATADDR_ANYPORT;
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ddp->ddp_next = ddpcb;
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ddp->ddp_prev = NULL;
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ddp->ddp_pprev = NULL;
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ddp->ddp_pnext = NULL;
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if (ddpcb) {
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ddpcb->ddp_prev = ddp;
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}
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ddpcb = ddp;
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ddp->ddp_socket = so;
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so->so_pcb = (caddr_t) ddp;
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return (0);
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}
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static void
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at_pcbdetach(so, ddp)
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struct socket *so;
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struct ddpcb *ddp;
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{
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soisdisconnected(so);
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so->so_pcb = 0;
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sofree(so);
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/* remove ddp from ddp_ports list */
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if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT &&
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ddp_ports[ddp->ddp_lsat.sat_port - 1] != NULL) {
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if (ddp->ddp_pprev != NULL) {
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ddp->ddp_pprev->ddp_pnext = ddp->ddp_pnext;
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} else {
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ddp_ports[ddp->ddp_lsat.sat_port - 1] = ddp->ddp_pnext;
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}
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if (ddp->ddp_pnext != NULL) {
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ddp->ddp_pnext->ddp_pprev = ddp->ddp_pprev;
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}
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}
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if (ddp->ddp_route.ro_rt) {
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rtfree(ddp->ddp_route.ro_rt);
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}
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if (ddp->ddp_prev) {
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ddp->ddp_prev->ddp_next = ddp->ddp_next;
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} else {
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ddpcb = ddp->ddp_next;
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}
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if (ddp->ddp_next) {
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ddp->ddp_next->ddp_prev = ddp->ddp_prev;
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}
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free(ddp, M_PCB);
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}
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/*
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* For the moment, this just find the pcb with the correct local address.
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* In the future, this will actually do some real searching, so we can use
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* the sender's address to do de-multiplexing on a single port to many
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* sockets (pcbs).
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*/
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struct ddpcb *
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ddp_search(from, to, aa)
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struct sockaddr_at *from;
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struct sockaddr_at *to;
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struct at_ifaddr *aa;
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{
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struct ddpcb *ddp;
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/*
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* Check for bad ports.
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*/
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if (to->sat_port < ATPORT_FIRST || to->sat_port >= ATPORT_LAST) {
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return (NULL);
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}
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/*
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* Make sure the local address matches the sent address. What about
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* the interface?
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*/
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for (ddp = ddp_ports[to->sat_port - 1]; ddp; ddp = ddp->ddp_pnext) {
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/* XXX should we handle 0.YY? */
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/* XXXX.YY to socket on destination interface */
|
|
if (to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net &&
|
|
to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node) {
|
|
break;
|
|
}
|
|
/* 0.255 to socket on receiving interface */
|
|
if (to->sat_addr.s_node == ATADDR_BCAST &&
|
|
(to->sat_addr.s_net == 0 ||
|
|
to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net) &&
|
|
ddp->ddp_lsat.sat_addr.s_net == AA_SAT(aa)->sat_addr.s_net) {
|
|
break;
|
|
}
|
|
/* XXXX.0 to socket on destination interface */
|
|
if (to->sat_addr.s_net == aa->aa_firstnet &&
|
|
to->sat_addr.s_node == 0 &&
|
|
ntohs(ddp->ddp_lsat.sat_addr.s_net) >=
|
|
ntohs(aa->aa_firstnet) &&
|
|
ntohs(ddp->ddp_lsat.sat_addr.s_net) <=
|
|
ntohs(aa->aa_lastnet)) {
|
|
break;
|
|
}
|
|
}
|
|
return (ddp);
|
|
}
|
|
|
|
/*
|
|
* Initialize all the ddp & appletalk stuff
|
|
*/
|
|
void
|
|
ddp_init()
|
|
{
|
|
TAILQ_INIT(&at_ifaddr);
|
|
atintrq1.ifq_maxlen = IFQ_MAXLEN;
|
|
atintrq2.ifq_maxlen = IFQ_MAXLEN;
|
|
}
|
|
|
|
#if 0
|
|
static void
|
|
ddp_clean()
|
|
{
|
|
struct ddpcb *ddp;
|
|
|
|
for (ddp = ddpcb; ddp; ddp = ddp->ddp_next)
|
|
at_pcbdetach(ddp->ddp_socket, ddp);
|
|
}
|
|
#endif
|