528 lines
12 KiB
C
528 lines
12 KiB
C
/*
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* Copyright (c) 1990,1994 Regents of The University of Michigan.
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* All Rights Reserved. See COPYRIGHT.
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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 <netinet/in.h>
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#include <netinet/if_ether.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/endian.h>
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#include <netatalk/at_extern.h>
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static void at_pcbdisconnect( struct ddpcb *ddp );
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static void at_sockaddr( struct ddpcb *ddp, struct mbuf *addr );
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static int at_pcbsetaddr( struct ddpcb *ddp, struct mbuf *addr, struct proc *p);
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static int at_pcbconnect( struct ddpcb *ddp, struct mbuf *addr, struct proc *p);
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static void at_pcbdetach( struct socket *so, struct ddpcb *ddp);
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static int at_pcballoc( struct socket *so );
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struct ddpcb *ddp_ports[ ATPORT_LAST ];
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struct ddpcb *ddpcb = NULL;
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u_long ddp_sendspace = DDP_MAXSZ; /* Max ddp size + 1 (ddp_type) */
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u_long ddp_recvspace = 10 * ( 587 + sizeof( struct sockaddr_at ));
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/*ARGSUSED*/
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int
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ddp_usrreq( struct socket *so, int req, struct mbuf *m,
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struct mbuf *addr, struct mbuf *rights)
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{
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struct proc *p = curproc; /* XXX */
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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( (int) 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( ddp, m );
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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( struct ddpcb *ddp, 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( struct ddpcb *ddp, struct mbuf *addr, 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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}
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if ( sat->sat_family != AF_APPLETALK ) {
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return( EAFNOSUPPORT );
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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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for ( aa = at_ifaddr; aa; aa = aa->aa_next ) {
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if (( sat->sat_addr.s_net == AA_SAT( aa )->sat_addr.s_net ) &&
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( sat->sat_addr.s_node == AA_SAT( aa )->sat_addr.s_node )) {
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break;
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}
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}
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if ( !aa ) {
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return( EADDRNOTAVAIL );
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}
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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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}
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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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}
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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 == NULL ) {
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return( EADDRNOTAVAIL );
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}
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sat->sat_addr = AA_SAT( at_ifaddr )->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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}
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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 == sat->sat_addr.s_net &&
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ddpp->ddp_lsat.sat_addr.s_node == sat->sat_addr.s_node ) {
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break;
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}
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}
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if ( ddpp != NULL ) {
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return( EADDRINUSE );
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}
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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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}
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return( 0 );
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}
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static int
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at_pcbconnect( struct ddpcb *ddp, struct mbuf *addr, 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 ) {
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for ( aa = at_ifaddr; aa; aa = aa->aa_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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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 = 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; aa; aa = aa->aa_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( 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( struct socket *so )
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{
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struct ddpcb *ddp;
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struct mbuf *m;
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m = m_getclr( M_WAIT, MT_PCB );
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ddp = mtod( m, struct ddpcb * );
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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( struct socket *so, 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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(void) m_free( dtom( ddp ));
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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( struct sockaddr_at *from, 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 */
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if ( to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net &&
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to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node ) {
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break;
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}
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/* 0.255 to socket on receiving interface */
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if ( to->sat_addr.s_node == ATADDR_BCAST && ( to->sat_addr.s_net == 0 ||
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to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net ) &&
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ddp->ddp_lsat.sat_addr.s_net == AA_SAT( aa )->sat_addr.s_net ) {
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break;
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}
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/* XXXX.0 to socket on destination interface */
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if ( to->sat_addr.s_net == aa->aa_firstnet &&
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to->sat_addr.s_node == 0 &&
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ntohs( ddp->ddp_lsat.sat_addr.s_net ) >=
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ntohs( aa->aa_firstnet ) &&
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ntohs( ddp->ddp_lsat.sat_addr.s_net ) <=
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ntohs( aa->aa_lastnet )) {
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break;
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}
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}
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return( ddp );
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}
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void
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ddp_init(void )
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{
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atintrq1.ifq_maxlen = IFQ_MAXLEN;
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atintrq2.ifq_maxlen = IFQ_MAXLEN;
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}
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#if 0
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static void
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|
ddp_clean(void )
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|
{
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struct ddpcb *ddp;
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|
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for ( ddp = ddpcb; ddp; ddp = ddp->ddp_next ) {
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at_pcbdetach( ddp->ddp_socket, ddp );
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|
}
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}
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|
#endif
|