4.3BSD-Reno/src/sys/netiso/tp_cons.c
/***********************************************************
Copyright IBM Corporation 1987
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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******************************************************************/
/*
* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
*/
/*
* ARGO TP
* $Header: tp_cons.c,v 5.6 88/11/18 17:27:13 nhall Exp $
* $Source: /usr/argo/sys/netiso/RCS/tp_cons.c,v $
* @(#)tp_cons.c 7.3 (Berkeley) 8/29/89 *
*
* Here is where you find the iso-dependent code. We've tried
* keep all net-level and (primarily) address-family-dependent stuff
* out of the tp source, and everthing here is reached indirectly
* through a switch table (struct nl_protosw *) tpcb->tp_nlproto
* (see tp_pcb.c).
* The routines here are:
* tpcons_mtu: figure out what size tpdu to use
* tpcons_input: pullup and call tp_input w/ correct arguments
* tpcons_output_dg: package a pkt for cons given 2 addresses & some data
* tpcons_output: package a pkt for cons given an isopcb & some data
* cons_chan_to_tpcb: find a tpcb based on the channel #
*/
#ifndef lint
static char *rcsid = "$Header: tp_cons.c,v 5.6 88/11/18 17:27:13 nhall Exp $";
#endif lint
#include "argoxtwentyfive.h"
#ifdef ISO
#if NARGOXTWENTYFIVE > 0
#include "param.h"
#include "socket.h"
#include "domain.h"
#include "mbuf.h"
#include "errno.h"
#include "time.h"
#include "../net/if.h"
#include "tp_param.h"
#include "argo_debug.h"
#include "tp_stat.h"
#include "tp_pcb.h"
#include "tp_trace.h"
#include "tp_stat.h"
#include "tp_tpdu.h"
#include "../net/route.h"
#include "iso.h"
#include "iso_pcb.h"
#include "cons.h"
#include "tp_seq.h"
int tpcons_output();
/*
* CALLED FROM:
* tp_input() on incoming CR, CC, and pr_usrreq() for PRU_CONNECT
* FUNCTION, ARGUMENTS, SIDE EFFECTS and RETURN VALUE:
* version of the previous procedure for X.25
*/
void
tpcons_mtu(so, isop, size, negot)
struct socket *so;
struct isopcb *isop;
int *size;
u_char *negot;
{
register struct ifnet *ifp;
register int i=0;
int windowsize = so->so_rcv.sb_hiwat;
struct ifnet *iso_routeifp();
IFTRACE(D_CONN)
tptrace(TPPTmisc, "ENTER GET MTU: size negot ",*size, *negot, 0, 0);
ENDTRACE
*size = 1 << *negot;
if ((ifp = iso_routeifp(&isop->isop_faddr)) == (struct ifnet *)0)
return;
if( *size > windowsize ) {
*size = windowsize;
i++;
}
if(*size > ifp->if_mtu) {
*size = ifp->if_mtu ;
i++;
}
if(i) {
/* size was changed by this routine - have to transform it to
* the log2 of size
*/
for(i=TP_MIN_TPDUSIZE; (i<TP_MAX_TPDUSIZE && ((1<<i)<*size)) ; i++)
;
/* are we on the same LAN? if so, negotiate one tpdu size larger,
* and actually send the real mtu size
*/
/* PHASE2: replace with iso_on_localnet(&isop->isop_faddr);
*/
if ( !iso_netmatch(&isop->isop_laddr, &isop->isop_faddr) ) {
i--;
*size = 1<<i;
}
*negot = i;
}
IFDEBUG(D_CONN)
printf("GET MTU RETURNS: ifp %s size 0x%x negot 0x%x\n",
ifp->if_name, *size, *negot);
ENDDEBUG
IFTRACE(D_CONN)
tptrace(TPPTmisc, "EXIT GET MTU: tpcb size negot ",
*size, *negot, 0, 0);
ENDTRACE
}
/*
* CALLED FROM:
* cons
* FUNCTION and ARGUMENTS:
* THIS MAYBE BELONGS IN SOME OTHER PLACE??? but i think not -
*/
ProtoHook
tpcons_ctlinput(cmd, siso, isop)
int cmd;
struct sockaddr_iso *siso;
struct isopcb *isop;
{
switch (cmd) {
case PRC_CONS_SEND_DONE:
if( isop->isop_socket ) { /* tp 0 only */
register struct tp_pcb *tpcb =
(struct tp_pcb *)isop->isop_socket->so_tpcb;
struct tp_event E;
int error = 0;
if( tpcb->tp_class == TP_CLASS_0 ) {
/* only if class is exactly class zero, not
* still in class negotiation
*/
/* fake an ack */
register SeqNum seq = SEQ_ADD(tpcb, tpcb->tp_snduna, 1);
IFTRACE(D_DATA)
tptrace(TPPTmisc, "FAKE ACK seq cdt 1",
seq, 0,0,0);
ENDTRACE
IFDEBUG(D_DATA)
printf("FAKE ACK seq 0x%x cdt 1\n", seq );
ENDDEBUG
E.ATTR(AK_TPDU).e_cdt = 1;
E.ATTR(AK_TPDU).e_seq = seq;
E.ATTR(AK_TPDU).e_subseq = 0;
E.ATTR(AK_TPDU).e_fcc_present = 0;
error = DoEvent(AK_TPDU);
if( error ) {
tpcb->tp_sock->so_error = error;
}
} /* else ignore it */
}
break;
case PRC_ROUTEDEAD:
if( isop->isop_socket ) { /* tp 0 only */
tpiso_reset(isop);
break;
} /* else drop through */
default:
(void) tpclnp_ctlinput(cmd, siso);
break;
}
return 0;
}
/*
* CALLED FROM:
* cons's intr routine
* FUNCTION and ARGUMENTS:
* Take a packet (m) from cons, pullup m as required by tp,
* ignore the socket argument, and call tp_input.
* No return value.
*/
ProtoHook
tpcons_input(m, faddr, laddr, so, channel)
struct mbuf *m;
struct sockaddr_iso *faddr, *laddr;
struct socket *so; /* not used */
int channel;
{
if( m == MNULL)
return 0;
m = (struct mbuf *)tp_inputprep(m);
IFDEBUG(D_TPINPUT)
printf("tpcons_input before tp_input(m 0x%x)\n", m);
dump_buf( m, 12+ m->m_len);
ENDDEBUG
tp_input(m, faddr, laddr, channel, tpcons_output);
return 0;
}
/*
* CALLED FROM:
* tp_emit()
* FUNCTION and ARGUMENTS:
* Take a packet(m0) from tp and package it so that cons will accept it.
* This means filling in a few of the fields.
* inp is the isopcb structure; datalen is the length of the data in the
* mbuf string m0.
* RETURN VALUE:
* whatever (E*) is returned form the net layer output routine.
*/
int
tpcons_output(isop, m0, datalen, nochksum)
struct isopcb *isop;
struct mbuf *m0;
int datalen;
int nochksum;
{
struct tp_pcb *tpcb;
int error;
IFDEBUG(D_EMIT)
printf(
"tpcons_output(isop 0x%x, m 0x%x, len 0x%x socket 0x%x\n",
isop, m0, datalen, isop->isop_socket);
ENDDEBUG
if(m0 == MNULL)
return 0;
ASSERT(m0->m_len > 0);
tpcb = (struct tp_pcb *)isop->isop_socket->so_tpcb;
/* check is for class EQUAL to 4: if still in negotiation stage,
* cannot send as dgm
*/
error = cons_output(isop, m0, datalen, (tpcb->tp_class == TP_CLASS_4));
IncStat(ts_tpdu_sent);
IFTRACE(D_EMIT)
tptrace( TPPTmisc,
"tpcons_output( isop m isdgm cons_output returns",
isop, m0, (tpcb->tp_class == TP_CLASS_4), error );
ENDTRACE
return error;
}
/*
* CALLED FROM:
* tp_error_emit()
* FUNCTION and ARGUMENTS:
* This is a copy of tpcons_output that takes the addresses
* instead of a pcb. It's used by the tp_error_emit, when we
* don't have an iso_pcb with which to call the normal output rtn.
* RETURN VALUE:
* ENOBUFS or
* whatever (E*) is returned form the net layer output routine.
*/
int
tpcons_output_dg(laddr, faddr, m0, datalen, ro, nochksum)
struct iso_addr *laddr, *faddr;
struct mbuf *m0;
int datalen;
struct route *ro;
int nochksum;
{
IFDEBUG(D_TPISO)
printf("PANIC: tpcons_output_dg datalen 0x%x m0 0x%x\n", datalen, m0);
ENDDEBUG
return 0;
}
struct tp_pcb *
cons_chan_to_tpcb(chan)
int chan;
{
extern struct isopcb *cons_chan_to_pcb ();
#ifdef ARGO_DEBUG
struct isopcb *isop = cons_chan_to_pcb (chan, -1);
#else ARGO_DEBUG
struct isopcb *isop = cons_chan_to_pcb (chan);
#endif ARGO_DEBUG
IFTRACE(D_CONN)
tptrace(TPPTmisc, "vc->tpcb(chan) socket",
chan, isop->isop_socket, 0, 0);
ENDTRACE
IFDEBUG(D_CONN)
printf("vc->tpcb(0x%x) socket 0x%x, *ISOP dump:",
chan, isop->isop_socket);
dump_buf( isop, 32);
ENDDEBUG
if( isop->isop_socket == (struct socket *)0 )
return (struct tp_pcb *) 0;
else {
return (struct tp_pcb *)(isop->isop_socket->so_tpcb);
}
}
#endif NARGOXTWENTYFIVE
#endif ISO