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- /*-
- * Copyright (c) 1991 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.
- *
- * @(#)iso_pcb.c 7.10 (Berkeley) 6/27/91
- */
-
- /***********************************************************
- Copyright IBM Corporation 1987
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the name of IBM not be
- used in advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- SOFTWARE.
-
- ******************************************************************/
-
- /*
- * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
- */
- /*
- * $Header: iso_pcb.c,v 4.5 88/06/29 14:59:56 hagens Exp $
- * $Source: /usr/argo/sys/netiso/RCS/iso_pcb.c,v $
- *
- * Iso address family net-layer(s) pcb stuff. NEH 1/29/87
- */
-
- #ifdef ISO
-
- #include "param.h"
- #include "systm.h"
- #include "mbuf.h"
- #include "socket.h"
- #include "socketvar.h"
- #include "errno.h"
-
- #include "argo_debug.h"
- #include "iso.h"
- #include "clnp.h"
- #include "../netinet/in_systm.h"
- #include "../net/if.h"
- #include "../net/route.h"
- #include "iso_pcb.h"
- #include "iso_var.h"
- #include "protosw.h"
-
- #ifdef TPCONS
- #include "../netccitt/x25.h"
- #include "../netccitt/pk.h"
- #include "../netccitt/pk_var.h"
- #endif
-
- #define PCBNULL (struct isopcb *)0
- struct iso_addr zeroiso_addr = {
- 0
- };
-
-
- /*
- * FUNCTION: iso_pcballoc
- *
- * PURPOSE: creates an isopcb structure in an mbuf,
- * with socket (so), and
- * puts it in the queue with head (head)
- *
- * RETURNS: 0 if OK, ENOBUFS if can't alloc the necessary mbuf
- */
- int
- iso_pcballoc(so, head)
- struct socket *so;
- struct isopcb *head;
- {
- register struct isopcb *isop;
-
- IFDEBUG(D_ISO)
- printf("iso_pcballoc(so 0x%x)\n", so);
- ENDDEBUG
- MALLOC(isop, struct isopcb *, sizeof(*isop), M_PCB, M_NOWAIT);
- if (isop == NULL)
- return ENOBUFS;
- bzero((caddr_t)isop, sizeof(*isop));
- isop->isop_head = head;
- isop->isop_socket = so;
- insque(isop, head);
- if (so)
- so->so_pcb = (caddr_t)isop;
- return 0;
- }
-
- /*
- * FUNCTION: iso_pcbbind
- *
- * PURPOSE: binds the address given in *(nam) to the socket
- * specified by the isopcb in *(isop)
- * If the given address is zero, it makes sure the
- * address isn't already in use and if it's got a network
- * portion, we look for an interface with that network
- * address. If the address given is zero, we allocate
- * a port and stuff it in the (nam) structure.
- *
- * RETURNS: errno E* or 0 if ok.
- *
- * SIDE EFFECTS: increments head->isop_lport if it allocates a port #
- *
- * NOTES:
- */
- #define satosiso(sa) ((struct sockaddr_iso *)(sa))
- int
- iso_pcbbind(isop, nam)
- register struct isopcb *isop;
- struct mbuf *nam;
- {
- register struct isopcb *head = isop->isop_head;
- register struct sockaddr_iso *siso;
- struct iso_ifaddr *ia;
- union {
- char data[2];
- u_short s;
- } suf;
-
- IFDEBUG(D_ISO)
- printf("iso_pcbbind(isop 0x%x, nam 0x%x)\n", isop, nam);
- ENDDEBUG
- suf.s = 0;
- if (iso_ifaddr == 0) /* any interfaces attached? */
- return EADDRNOTAVAIL;
- if (isop->isop_laddr) /* already bound */
- return EADDRINUSE;
- if(nam == (struct mbuf *)0) {
- isop->isop_laddr = &isop->isop_sladdr;
- isop->isop_sladdr.siso_len = sizeof(struct sockaddr_iso);
- isop->isop_sladdr.siso_family = AF_ISO;
- isop->isop_sladdr.siso_tlen = 2;
- isop->isop_sladdr.siso_nlen = 0;
- isop->isop_sladdr.siso_slen = 0;
- isop->isop_sladdr.siso_plen = 0;
- goto noname;
- }
- siso = mtod(nam, struct sockaddr_iso *);
- IFDEBUG(D_ISO)
- printf("iso_pcbbind(name len 0x%x)\n", nam->m_len);
- printf("The address is %s\n", clnp_iso_addrp(&siso->siso_addr));
- ENDDEBUG
- /*
- * We would like sort of length check but since some OSI addrs
- * do not have fixed length, we can't really do much.
- * The ONLY thing we can say is that an osi addr has to have
- * at LEAST an afi and one more byte and had better fit into
- * a struct iso_addr.
- * However, in fact the size of the whole thing is a struct
- * sockaddr_iso, so probably this is what we should check for.
- */
- if( (nam->m_len < 2) || (nam->m_len < siso->siso_len)) {
- return ENAMETOOLONG;
- }
- if (siso->siso_tlen) {
- register char *cp = TSEL(siso);
- suf.data[0] = cp[0];
- suf.data[1] = cp[1];
- }
- if (siso->siso_nlen) {
- /* non-zero net addr- better match one of our interfaces */
- IFDEBUG(D_ISO)
- printf("iso_pcbbind: bind to NOT zeroisoaddr\n");
- ENDDEBUG
- for (ia = iso_ifaddr; ia; ia = ia->ia_next)
- if (SAME_ISOADDR(siso, &ia->ia_addr))
- break;
- if (ia == 0)
- return EADDRNOTAVAIL;
- }
- if (siso->siso_len <= sizeof (isop->isop_sladdr)) {
- isop->isop_laddr = &isop->isop_sladdr;
- } else {
- if ((nam = m_copy(nam, 0, (int)M_COPYALL)) == 0)
- return ENOBUFS;
- isop->isop_laddr = mtod(nam, struct sockaddr_iso *);
- }
- bcopy((caddr_t)siso, (caddr_t)isop->isop_laddr, siso->siso_len);
- if (suf.s || siso->siso_tlen != 2) {
- if((suf.s < ISO_PORT_RESERVED) && (siso->siso_tlen <= 2) &&
- (isop->isop_socket->so_state && SS_PRIV) == 0)
- return EACCES;
- if ((isop->isop_socket->so_options & SO_REUSEADDR) == 0 &&
- iso_pcblookup(head, 0, (caddr_t)0, isop->isop_laddr))
- return EADDRINUSE;
- } else {
- register char *cp;
- noname:
- cp = TSEL(isop->isop_laddr);
- IFDEBUG(D_ISO)
- printf("iso_pcbbind noname\n");
- ENDDEBUG
- do {
- if (head->isop_lport++ < ISO_PORT_RESERVED ||
- head->isop_lport > ISO_PORT_USERRESERVED)
- head->isop_lport = ISO_PORT_RESERVED;
- suf.s = head->isop_lport;
- cp[0] = suf.data[0];
- cp[1] = suf.data[1];
- } while (iso_pcblookup(head, 0, (caddr_t)0, isop->isop_laddr));
- }
- IFDEBUG(D_ISO)
- printf("iso_pcbbind returns 0, suf 0x%x\n", suf);
- ENDDEBUG
- return 0;
- }
- /*
- * FUNCTION: iso_pcbconnect
- *
- * PURPOSE: Make the isopcb (isop) look like it's connected.
- * In other words, give it the peer address given in
- * the mbuf * (nam). Make sure such a combination
- * of local, peer addresses doesn't already exist
- * for this protocol. Internet mentality prevails here,
- * wherein a src,dst pair uniquely identifies a connection.
- * Both net address and port must be specified in argument
- * (nam).
- * If we don't have a local address for this socket yet,
- * we pick one by calling iso_pcbbind().
- *
- * RETURNS: errno E* or 0 if ok.
- *
- * SIDE EFFECTS: Looks up a route, which may cause one to be left
- * in the isopcb.
- *
- * NOTES:
- */
- int
- iso_pcbconnect(isop, nam)
- register struct isopcb *isop;
- struct mbuf *nam;
- {
- register struct sockaddr_iso *siso = mtod(nam, struct sockaddr_iso *);
- int local_zero, error = 0;
- struct iso_ifaddr *ia;
-
- IFDEBUG(D_ISO)
- printf("iso_pcbconnect(isop 0x%x sock 0x%x nam 0x%x",
- isop, isop->isop_socket, nam);
- printf("nam->m_len 0x%x), addr:\n", nam->m_len);
- dump_isoaddr(siso);
- ENDDEBUG
- if (nam->m_len < siso->siso_len)
- return EINVAL;
- if (siso->siso_family != AF_ISO)
- return EAFNOSUPPORT;
- if (siso->siso_nlen == 0) {
- if (ia = iso_ifaddr) {
- int nlen = ia->ia_addr.siso_nlen;
- ovbcopy(TSEL(siso), nlen + TSEL(siso),
- siso->siso_plen + siso->siso_tlen + siso->siso_slen);
- bcopy((caddr_t)&ia->ia_addr.siso_addr,
- (caddr_t)&siso->siso_addr, nlen + 1);
- /* includes siso->siso_nlen = nlen; */
- } else
- return EADDRNOTAVAIL;
- }
- /*
- * Local zero means either not bound, or bound to a TSEL, but no
- * particular local interface. So, if we want to send somebody
- * we need to choose a return address.
- */
- local_zero =
- ((isop->isop_laddr == 0) || (isop->isop_laddr->siso_nlen == 0));
- if (local_zero) {
- int flags;
-
- IFDEBUG(D_ISO)
- printf("iso_pcbconnect localzero 1\n");
- ENDDEBUG
- /*
- * If route is known or can be allocated now,
- * our src addr is taken from the i/f, else punt.
- */
- flags = isop->isop_socket->so_options & SO_DONTROUTE;
- if (error = clnp_route(&siso->siso_addr, &isop->isop_route, flags,
- (struct sockaddr **)0, &ia))
- return error;
- IFDEBUG(D_ISO)
- printf("iso_pcbconnect localzero 2, ro->ro_rt 0x%x",
- isop->isop_route.ro_rt);
- printf(" ia 0x%x\n", ia);
- ENDDEBUG
- }
- IFDEBUG(D_ISO)
- printf("in iso_pcbconnect before lookup isop 0x%x isop->sock 0x%x\n",
- isop, isop->isop_socket);
- ENDDEBUG
- if (local_zero) {
- int nlen, tlen, totlen; caddr_t oldtsel, newtsel;
- siso = isop->isop_laddr;
- if (siso == 0 || siso->siso_tlen == 0)
- (void)iso_pcbbind(isop, (struct mbuf *)0);
- /*
- * Here we have problem of squezeing in a definite network address
- * into an existing sockaddr_iso, which in fact may not have room
- * for it. This gets messy.
- */
- siso = isop->isop_laddr;
- oldtsel = TSEL(siso);
- tlen = siso->siso_tlen;
- nlen = ia->ia_addr.siso_nlen;
- totlen = tlen + nlen + _offsetof(struct sockaddr_iso, siso_data[0]);
- if ((siso == &isop->isop_sladdr) &&
- (totlen > sizeof(isop->isop_sladdr))) {
- struct mbuf *m = m_get(MT_SONAME, M_DONTWAIT);
- if (m == 0)
- return ENOBUFS;
- m->m_len = totlen;
- isop->isop_laddr = siso = mtod(m, struct sockaddr_iso *);
- }
- siso->siso_nlen = ia->ia_addr.siso_nlen;
- newtsel = TSEL(siso);
- ovbcopy(oldtsel, newtsel, tlen);
- bcopy(ia->ia_addr.siso_data, siso->siso_data, nlen);
- siso->siso_tlen = tlen;
- siso->siso_family = AF_ISO;
- siso->siso_len = totlen;
- siso = mtod(nam, struct sockaddr_iso *);
- }
- IFDEBUG(D_ISO)
- printf("in iso_pcbconnect before bcopy isop 0x%x isop->sock 0x%x\n",
- isop, isop->isop_socket);
- ENDDEBUG
- /*
- * If we had to allocate space to a previous big foreign address,
- * and for some reason we didn't free it, we reuse it knowing
- * that is going to be big enough, as sockaddrs are delivered in
- * 128 byte mbufs.
- * If the foreign address is small enough, we use default space;
- * otherwise, we grab an mbuf to copy into.
- */
- if (isop->isop_faddr == 0 || isop->isop_faddr == &isop->isop_sfaddr) {
- if (siso->siso_len <= sizeof(isop->isop_sfaddr))
- isop->isop_faddr = &isop->isop_sfaddr;
- else {
- struct mbuf *m = m_get(MT_SONAME, M_DONTWAIT);
- if (m == 0)
- return ENOBUFS;
- isop->isop_faddr = mtod(m, struct sockaddr_iso *);
- }
- }
- bcopy((caddr_t)siso, (caddr_t)isop->isop_faddr, siso->siso_len);
- IFDEBUG(D_ISO)
- printf("in iso_pcbconnect after bcopy isop 0x%x isop->sock 0x%x\n",
- isop, isop->isop_socket);
- printf("iso_pcbconnect connected to addr:\n");
- dump_isoaddr(isop->isop_faddr);
- printf("iso_pcbconnect end: src addr:\n");
- dump_isoaddr(isop->isop_laddr);
- ENDDEBUG
- return 0;
- }
-
- /*
- * FUNCTION: iso_pcbdisconnect()
- *
- * PURPOSE: washes away the peer address info so the socket
- * appears to be disconnected.
- * If there's no file descriptor associated with the socket
- * it detaches the pcb.
- *
- * RETURNS: Nada.
- *
- * SIDE EFFECTS: May detach the pcb.
- *
- * NOTES:
- */
- void
- iso_pcbdisconnect(isop)
- struct isopcb *isop;
- {
- void iso_pcbdetach();
- register struct sockaddr_iso *siso;
-
- IFDEBUG(D_ISO)
- printf("iso_pcbdisconnect(isop 0x%x)\n", isop);
- ENDDEBUG
- /*
- * Preserver binding infnormation if already bound.
- */
- if ((siso = isop->isop_laddr) && siso->siso_nlen && siso->siso_tlen) {
- caddr_t otsel = TSEL(siso);
- siso->siso_nlen = 0;
- ovbcopy(otsel, TSEL(siso), siso->siso_tlen);
- }
- if (isop->isop_faddr && isop->isop_faddr != &isop->isop_sfaddr)
- m_freem(dtom(isop->isop_faddr));
- isop->isop_faddr = 0;
- if (isop->isop_socket->so_state & SS_NOFDREF)
- iso_pcbdetach(isop);
- }
-
- /*
- * FUNCTION: iso_pcbdetach
- *
- * PURPOSE: detach the pcb at *(isop) from it's socket and free
- * the mbufs associated with the pcb..
- * Dequeues (isop) from its head.
- *
- * RETURNS: Nada.
- *
- * SIDE EFFECTS:
- *
- * NOTES:
- */
- void
- iso_pcbdetach(isop)
- struct isopcb *isop;
- {
- struct socket *so = isop->isop_socket;
-
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach(isop 0x%x socket 0x%x so 0x%x)\n",
- isop, isop->isop_socket, so);
- ENDDEBUG
- #ifdef TPCONS
- if (isop->isop_refcnt) {
- register struct pklcd *lcp = (struct pklcd *)isop->isop_chan;
- if (--isop->isop_refcnt > 0)
- return;
- if (lcp && lcp->lcd_state == DATA_TRANSFER)
- pk_disconnect(lcp);
- isop->isop_chan = 0;
- }
- #endif
- if (so) { /* in the x.25 domain, we sometimes have no socket */
- so->so_pcb = 0;
- sofree(so);
- }
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 2 \n");
- ENDDEBUG
- if (isop->isop_options)
- (void)m_free(isop->isop_options);
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 3 \n");
- ENDDEBUG
- if (isop->isop_route.ro_rt)
- rtfree(isop->isop_route.ro_rt);
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 3.1\n");
- ENDDEBUG
- if (isop->isop_clnpcache != NULL) {
- struct clnp_cache *clcp =
- mtod(isop->isop_clnpcache, struct clnp_cache *);
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 3.2: clcp 0x%x freeing clc_hdr x%x\n",
- clcp, clcp->clc_hdr);
- ENDDEBUG
- if (clcp->clc_hdr != NULL)
- m_free(clcp->clc_hdr);
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 3.3: freeing cache x%x\n",
- isop->isop_clnpcache);
- ENDDEBUG
- m_free(isop->isop_clnpcache);
- }
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 4 \n");
- ENDDEBUG
- remque(isop);
- IFDEBUG(D_ISO)
- printf("iso_pcbdetach 5 \n");
- ENDDEBUG
- if (isop->isop_laddr && (isop->isop_laddr != &isop->isop_sladdr))
- m_freem(dtom(isop->isop_laddr));
- free((caddr_t)isop, M_PCB);
- }
-
-
- /*
- * FUNCTION: iso_pcbnotify
- *
- * PURPOSE: notify all connections in this protocol's queue (head)
- * that have peer address (dst) of the problem (errno)
- * by calling (notify) on the connections' isopcbs.
- *
- * RETURNS: Rien.
- *
- * SIDE EFFECTS:
- *
- * NOTES: (notify) is called at splimp!
- */
- void
- iso_pcbnotify(head, siso, errno, notify)
- struct isopcb *head;
- register struct sockaddr_iso *siso;
- int errno, (*notify)();
- {
- register struct isopcb *isop;
- int s = splimp();
-
- IFDEBUG(D_ISO)
- printf("iso_pcbnotify(head 0x%x, notify 0x%x) dst:\n", head, notify);
- ENDDEBUG
- for (isop = head->isop_next; isop != head; isop = isop->isop_next) {
- if (isop->isop_socket == 0 || isop->isop_faddr == 0 ||
- !SAME_ISOADDR(siso, isop->isop_faddr)) {
- IFDEBUG(D_ISO)
- printf("iso_pcbnotify: CONTINUE isop 0x%x, sock 0x%x\n" ,
- isop, isop->isop_socket);
- printf("addrmatch cmp'd with (0x%x):\n", isop->isop_faddr);
- dump_isoaddr(isop->isop_faddr);
- ENDDEBUG
- continue;
- }
- if (errno)
- isop->isop_socket->so_error = errno;
- if (notify)
- (*notify)(isop);
- }
- splx(s);
- IFDEBUG(D_ISO)
- printf("END OF iso_pcbnotify\n" );
- ENDDEBUG
- }
-
-
- /*
- * FUNCTION: iso_pcblookup
- *
- * PURPOSE: looks for a given combination of (faddr), (fport),
- * (lport), (laddr) in the queue named by (head).
- * Argument (flags) is ignored.
- *
- * RETURNS: ptr to the isopcb if it finds a connection matching
- * these arguments, o.w. returns zero.
- *
- * SIDE EFFECTS:
- *
- * NOTES:
- */
- struct isopcb *
- iso_pcblookup(head, fportlen, fport, laddr)
- struct isopcb *head;
- register struct sockaddr_iso *laddr;
- caddr_t fport;
- int fportlen;
- {
- register struct isopcb *isop;
- register caddr_t lp = TSEL(laddr);
- unsigned int llen = laddr->siso_tlen;
-
- IFDEBUG(D_ISO)
- printf("iso_pcblookup(head 0x%x laddr 0x%x fport 0x%x)\n",
- head, laddr, fport);
- ENDDEBUG
- for (isop = head->isop_next; isop != head; isop = isop->isop_next) {
- if (isop->isop_laddr == 0 || isop->isop_laddr == laddr)
- continue;
- if (isop->isop_laddr->siso_tlen != llen)
- continue;
- if (bcmp(lp, TSEL(isop->isop_laddr), llen))
- continue;
- if (fportlen && isop->isop_faddr &&
- bcmp(fport, TSEL(isop->isop_faddr), (unsigned)fportlen))
- continue;
- /* PHASE2
- * addrmatch1 should be iso_addrmatch(a, b, mask)
- * where mask is taken from isop->isop_laddrmask (new field)
- * isop_lnetmask will also be available in isop
- if (laddr != &zeroiso_addr &&
- !iso_addrmatch1(laddr, &(isop->isop_laddr.siso_addr)))
- continue;
- */
- if (laddr->siso_nlen && (!SAME_ISOADDR(laddr, isop->isop_laddr)))
- continue;
- return (isop);
- }
- return (struct isopcb *)0;
- }
- #endif ISO
-