/*********************************************************** 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 */ /* * 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 $ * * 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 "types.h" #include "socket.h" #include "domain.h" #include "mbuf.h" #include "errno.h" #include "time.h" #include "../net/if.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 "../net/route.h" #include "../netiso/iso.h" #include "../netiso/iso_pcb.h" #include "../netiso/cons.h" #include "../netiso/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; (iisop_faddr); */ if ( !iso_netmatch(&isop->isop_laddr, &isop->isop_faddr) ) { i--; *size = 1<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