/***********************************************************
Copyright IBM Corporation 1987
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
******************************************************************/
* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
* $Header: tp_iso.c,v 5.3 88/11/18 17:27:57 nhall Exp $
* $Source: /usr/argo/sys/netiso/RCS/tp_iso.c,v $
* 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
* iso_getsufx: gets transport suffix out of an isopcb structure.
* iso_putsufx: put transport suffix into an isopcb structure.
* iso_putnetaddr: put a whole net addr into an isopcb.
* iso_getnetaddr: get a whole net addr from an isopcb.
* iso_recycle_suffix: clear suffix for reuse in isopcb
* tpclnp_ctlinput: handle ER CNLPdu : icmp-like stuff
* tpclnp_mtu: figure out what size tpdu to use
* tpclnp_input: take a pkt from clnp, strip off its clnp header,
* tpclnp_output_dg: package a pkt for clnp given 2 addresses & some data
* tpclnp_output: package a pkt for clnp given an isopcb & some data
static char *rcsid
= "$Header: tp_iso.c,v 5.3 88/11/18 17:27:57 nhall Exp $";
#include "../h/socketvar.h"
#include "../net/route.h"
#include "../h/protosw.h"
#include "../netiso/tp_param.h"
#include "../netiso/argo_debug.h"
#include "../netiso/tp_stat.h"
#include "../netiso/tp_pcb.h"
#include "../netiso/tp_trace.h"
#include "../netiso/tp_stat.h"
#include "../netiso/tp_tpdu.h"
#include "../netiso/tp_clnp.h"
* pr_usrreq() on PRU_BIND, PRU_CONNECT, PRU_ACCEPT, and PRU_PEERADDR
* FUNCTION, ARGUMENTS, and RETURN VALUE:
* Return a transport suffix from an isopcb structure (inp).
* The argument (which) takes the value TP_LOCAL or TP_FOREIGN.
return htons(isop
->isop_laddr
.siso_tsuffix
);
return htons(isop
->isop_faddr
.siso_tsuffix
);
* tp_newsocket(); i.e., when a connection is being established by an
* Put a transport suffix (found in name) into an isopcb structure (isop).
* The argument (which) takes the value TP_LOCAL or TP_FOREIGN.
iso_putsufx(isop
, name
, which
)
struct sockaddr_iso
*name
;
isop
->isop_lport
= ntohs(name
->siso_tsuffix
);
isop
->isop_fport
= ntohs(name
->siso_tsuffix
);
* tp.trans whenever we go into REFWAIT state.
* Called when a ref is frozen, to allow the suffix to be reused.
* (isop) is the net level pcb. This really shouldn't have to be
* done in a NET level pcb but... for the internet world that just
* the way it is done in BSD...
* The alternative is to have the port unusable until the reference
iso_recycle_tsuffix(isop
)
isop
->isop_laddr
.siso_tsuffix
= isop
->isop_faddr
.siso_tsuffix
= 0;
* tp_newsocket(); i.e., when a connection is being established by an
* FUNCTION and ARGUMENTS:
* Copy a whole net addr from a struct sockaddr (name).
* The argument (which) takes values TP_LOCAL or TP_FOREIGN
iso_putnetaddr(isop
, name
, which
)
register struct isopcb
*isop
;
struct sockaddr_iso
*name
;
isop
->isop_laddr
.siso_family
= AF_ISO
;
bcopy((caddr_t
)&name
->siso_addr
,
(caddr_t
)&isop
->isop_laddr
.siso_addr
, sizeof(struct iso_addr
));
printf("PUT TP_LOCAL addr\n");
dump_isoaddr(&isop
->isop_laddr
);
isop
->isop_faddr
.siso_family
= AF_ISO
;
if( name
!= (struct sockaddr_iso
*)0 ) {
bcopy((caddr_t
)&name
->siso_addr
,
(caddr_t
)&isop
->isop_faddr
.siso_addr
, sizeof(struct iso_addr
));
printf("PUT TP_FOREIGN addr\n");
dump_isoaddr(&isop
->isop_faddr
);
* pr_usrreq() PRU_SOCKADDR, PRU_ACCEPT, PRU_PEERADDR
* FUNCTION and ARGUMENTS:
* Copy a whole net addr from an isopcb (isop) into
* a struct sockaddr (name).
* The argument (which) takes values TP_LOCAL or TP_FOREIGN.
iso_getnetaddr( isop
, name
, which
)
struct sockaddr_iso
*name
;
bcopy( (caddr_t
)&isop
->isop_laddr
.siso_addr
,
(caddr_t
)&name
->siso_addr
, sizeof(struct iso_addr
));
bcopy( (caddr_t
)&isop
->isop_faddr
.siso_addr
,
(caddr_t
)&name
->siso_addr
, sizeof(struct iso_addr
));
* tp_input() on incoming CR, CC, and pr_usrreq() for PRU_CONNECT
* FUNCTION, ARGUMENTS, SIDE EFFECTS and RETURN VALUE:
* Determine the proper maximum transmission unit, i.e., MTU, to use, given
* a) the header size for the network protocol and the max transmission
* unit on the subnet interface, determined from the information in (isop),
* b) the max size negotiated so far (negot)
* c) the window size used by the tp connection (found in so),
* The result is put in the integer *size in its integer form and in
* *negot in its logarithmic form.
* a) can only negotiate down from the value found in *negot.
* b) the MTU must be < the windowsize,
* c) If src and dest are on the same net,
* we will negotiate the closest size larger than MTU but really USE
* the actual device mtu - ll hdr sizes.
* otherwise we negotiate the closest size smaller than MTU - ll hdr sizes.
tpclnp_mtu(so
, isop
, size
, negot
)
int windowsize
= so
->so_rcv
.sb_hiwat
;
struct ifnet
*iso_routeifp();
printf("tpclnp_mtu(0x%x,0x%x,0x%x,0x%x)\n", so
, isop
, size
, negot
);
tptrace(TPPTmisc
, "ENTER GET MTU: size negot \n",*size
, *negot
, 0, 0);
if( *size
> windowsize
) {
if ((ifp
= iso_routeifp(&isop
->isop_faddr
)) == (struct ifnet
*)0)
/* TODO - make this indirect off the socket structure to the
* network layer to get headersize
clnp_size
= clnp_hdrsize(isop
->isop_laddr
.siso_addr
.isoa_len
);
if(*size
> ifp
->if_mtu
- clnp_size
) {
*size
= ifp
->if_mtu
- clnp_size
;
tptrace(TPPTmisc
, "GET MTU MID: tpcb size negot i \n",
/* have to transform size 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);
* or something along those lines
if ( iso_netmatch(&isop
->isop_laddr
, &isop
->isop_faddr
) && sizeismtu
) {
printf("GET MTU RETURNS: ifp %s size 0x%x negot 0x%x\n",
ifp
->if_name
, *size
, *negot
);
tptrace(TPPTmisc
, "EXIT GET MTU: tpcb size negot \n",
* FUNCTION and ARGUMENTS:
* Take a packet(m0) from tp and package it so that clnp will accept it.
* This means prepending space for the clnp header and filling in a few
* inp is the isopcb structure; datalen is the length of the data in the
* whatever (E*) is returned form the net layer output routine.
tpclnp_output(isop
, m0
, datalen
, nochksum
)
struct tpdu
*hdr
= mtod(m0
, struct tpdu
*);
"abt to call clnp_output: datalen 0x%x, hdr.li 0x%x, hdr.dutype 0x%x nocsum x%x dst addr:\n",
(int)hdr
->tpdu_li
, (int)hdr
->tpdu_type
, nochksum
);
dump_isoaddr(&isop
->isop_faddr
);
dump_isoaddr(&isop
->isop_laddr
);
dump_mbuf(m0
, "at tpclnp_output");
clnp_output(m0
, isop
, datalen
, nochksum
?CLNP_NO_CKSUM
:0 /* flags */);
* FUNCTION and ARGUMENTS:
* This is a copy of tpclnp_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.
* whatever (E*) is returned form the net layer output routine.
tpclnp_output_dg(laddr
, faddr
, m0
, datalen
, ro
, nochksum
)
struct iso_addr
*laddr
, *faddr
;
printf("tpclnp_output_dg datalen 0x%x m0 0x%x\n", datalen
, m0
);
* Fill in minimal portion of isopcb so that clnp can send the
bzero((caddr_t
)&tmppcb
, sizeof(tmppcb
));
isoa
= &(tmppcb
.isop_laddr
.siso_addr
);
bcopy((caddr_t
)laddr
, (caddr_t
)isoa
, sizeof (struct iso_addr
));
isoa
= &(tmppcb
.isop_faddr
.siso_addr
);
bcopy((caddr_t
)faddr
, (caddr_t
)isoa
, sizeof (struct iso_addr
));
printf("tpclnp_output_dg faddr: \n");
dump_isoaddr(&tmppcb
.isop_faddr
);
printf("\ntpclnp_output_dg laddr: \n");
dump_isoaddr(&tmppcb
.isop_laddr
);
* Do not use packet cache since this is a one shot error packet
flags
= (CLNP_NOCACHE
|(nochksum
?CLNP_NO_CKSUM
:0));
err
= clnp_output(m0
, &tmppcb
, datalen
, flags
);
* Free route allocated by clnp (if the route was indeed allocated)
if (tmppcb
.isop_route
.ro_rt
)
RTFREE(tmppcb
.isop_route
.ro_rt
);
* clnp's input routine, indirectly through the protosw.
* FUNCTION and ARGUMENTS:
* Take a packet (m) from clnp, strip off the clnp header and give it to tp
tpclnp_input(m
, faddr
, laddr
, clnp_len
)
struct iso_addr
*faddr
, *laddr
;
struct sockaddr_iso src
, dst
;
printf("tpclnp_input: m 0x%x clnp_len 0x%x\n", m
, clnp_len
);
dump_mbuf(m
, "at tpclnp_input");
* CLNP gives us an mbuf chain WITH the clnp header pulled up,
* and the length of the clnp header.
* First, strip off the Clnp header. leave the mbuf there for the
m
= (struct mbuf
*)tp_inputprep(m
);
dump_mbuf(m
, "after tpclnp_input both pullups");
src
.siso_family
= dst
.siso_family
= AF_ISO
;
bcopy(faddr
, &src
.siso_addr
, sizeof(struct iso_addr
));
bcopy(laddr
, &dst
.siso_addr
, sizeof(struct iso_addr
));
printf("calling tp_input: &src 0x%x &dst 0x%x, src addr:\n",
(void) tp_input(m
, &src
, &dst
, 0, tpclnp_output_dg
);
if(time
.tv_usec
& 0x4 && time
.tv_usec
& 0x40) {
printf("tpclnp_input: FAKING %s\n",
tp_stat
.ts_pkt_rcvd
& 0x1?"QUENCH":"QUENCH2");
if(tp_stat
.ts_pkt_rcvd
& 0x1) {
tpclnp_ctlinput(PRC_QUENCH
, &src
);
tpclnp_ctlinput(PRC_QUENCH2
, &src
);
printf("tpclnp_input DISCARD\n");
tptrace(TPPTmisc
, "tpclnp_input DISCARD m", m
,0,0,0);
* FUNCTION and ARGUMENTS:
* find the tpcb pointer and pass it to tp_quench
tp_quench( isop
->isop_socket
->so_tpcb
, PRC_QUENCH2
);
* FUNCTION and ARGUMENTS:
* find the tpcb pointer and pass it to tp_quench
tp_quench( isop
->isop_socket
->so_tpcb
, PRC_QUENCH
);
* The network layer through the protosw table.
* FUNCTION and ARGUMENTS:
* When clnp an ICMP-like msg this gets called.
* It either returns an error status to the user or
* it causes all connections on this address to be aborted
* by calling the appropriate xx_notify() routine.
* (cmd) is the type of ICMP error.
* (siso) is the address of the guy who sent the ER CLNPDU
tpclnp_ctlinput(cmd
, siso
)
struct sockaddr_iso
*siso
;
extern u_char inetctlerrmap
[];
extern ProtoHook
tpiso_abort();
extern ProtoHook
iso_rtchange();
extern ProtoHook
tpiso_reset();
printf("tpclnp_ctlinput: cmd 0x%x addr: ", cmd
);
if (cmd
< 0 || cmd
> PRC_NCMDS
)
iso_pcbnotify(&tp_isopcb
, &siso
->siso_addr
, 0, tpiso_decbit
);
iso_pcbnotify(&tp_isopcb
, &siso
->siso_addr
, 0, tpiso_quench
);
iso_pcbnotify(&tp_isopcb
, &siso
->siso_addr
, 0, tpiso_reset
);
iso_pcbnotify(&tp_isopcb
, &siso
->siso_addr
,
(int)inetctlerrmap
[cmd
], iso_rtchange
);
case PRC_UNREACH_PROTOCOL:
case PRC_UNREACH_NEEDFRAG:
case PRC_UNREACH_SRCFAIL:
case PRC_REDIRECT_TOSNET:
case PRC_REDIRECT_TOSHOST:
case PRC_TIMXCEED_INTRANS:
iso_pcbnotify(&tp_isopcb
, &siso
->siso_addr
,
(int)inetctlerrmap
[cmd
], tpiso_abort
);
* These next 2 routines are
* xxx_notify() from tp_ctlinput() when
* net level gets some ICMP-equiv. type event.
* FUNCTION and ARGUMENTS:
* Cause the connection to be aborted with some sort of error
* reason indicating that the network layer caused the abort.
* Fakes an ER TPDU so we can go through the driver.
* abort always aborts the TP connection.
* reset may or may not, depending on the TP class that's in use.
printf("tpiso_abort 0x%x\n", isop
);
e
.ATTR(ER_TPDU
).e_reason
= ECONNABORTED
;
return tp_driver((struct tp_pcb
*)isop
->isop_socket
->so_tpcb
, &e
);
e
.ev_number
= T_NETRESET
;
return tp_driver((struct tp_pcb
*)isop
->isop_socket
->so_tpcb
, &e
);