+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) University of British Columbia, 1984
- * Copyright (C) Computer Science Department IV,
- * University of Erlangen-Nuremberg, Germany, 1992
- * Copyright (c) 1991, 1992, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by the
- * Laboratory for Computation Vision and the Computer Science Department
- * of the the University of British Columbia and the Computer Science
- * Department (IV) of the University of Erlangen-Nuremberg, Germany.
- *
- * 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.
- *
- * @(#)pk_output.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/protosw.h>
-#include <sys/errno.h>
-
-#include <net/if.h>
-
-#include <netccitt/x25.h>
-#include <netccitt/pk.h>
-#include <netccitt/pk_var.h>
-
-struct mbuf_cache pk_output_cache = {0 }, pk_input_cache;
-struct mbuf *nextpk ();
-
-pk_output (lcp)
-register struct pklcd *lcp;
-{
- register struct x25_packet *xp;
- register struct mbuf *m;
- register struct pkcb *pkp = lcp -> lcd_pkp;
-
- if (lcp == 0 || pkp == 0) {
- printf ("pk_output: zero arg\n");
- return;
- }
-
- while ((m = nextpk (lcp)) != NULL) {
- xp = mtod (m, struct x25_packet *);
-
- switch (pk_decode (xp) + lcp -> lcd_state) {
- /*
- * All the work is already done - just set the state and
- * pass to peer.
- */
- case CALL + READY:
- lcp -> lcd_state = SENT_CALL;
- lcp -> lcd_timer = pk_t21;
- break;
-
- /*
- * Just set the state to allow packet to flow and send the
- * confirmation.
- */
- case CALL_ACCEPTED + RECEIVED_CALL:
- lcp -> lcd_state = DATA_TRANSFER;
- break;
-
- /*
- * Just set the state. Keep the LCD around till the clear
- * confirmation is returned.
- */
- case CLEAR + RECEIVED_CALL:
- case CLEAR + SENT_CALL:
- case CLEAR + DATA_TRANSFER:
- lcp -> lcd_state = SENT_CLEAR;
- lcp -> lcd_retry = 0;
- /* fall through */
-
- case CLEAR + SENT_CLEAR:
- lcp -> lcd_timer = pk_t23;
- lcp -> lcd_retry++;
- break;
-
- case CLEAR_CONF + RECEIVED_CLEAR:
- case CLEAR_CONF + SENT_CLEAR:
- case CLEAR_CONF + READY:
- lcp -> lcd_state = READY;
- break;
-
- case DATA + DATA_TRANSFER:
- SPS(xp, lcp -> lcd_ssn);
- lcp -> lcd_input_window =
- (lcp -> lcd_rsn + 1) % MODULUS;
- SPR(xp, lcp -> lcd_input_window);
- lcp -> lcd_last_transmitted_pr = lcp -> lcd_input_window;
- lcp -> lcd_ssn = (lcp -> lcd_ssn + 1) % MODULUS;
- if (lcp -> lcd_ssn == ((lcp -> lcd_output_window + lcp -> lcd_windowsize) % MODULUS))
- lcp -> lcd_window_condition = TRUE;
- break;
-
- case INTERRUPT + DATA_TRANSFER:
-#ifdef ancient_history
- xp -> packet_data = 0;
-#endif
- lcp -> lcd_intrconf_pending = TRUE;
- break;
-
- case INTERRUPT_CONF + DATA_TRANSFER:
- break;
-
- case RR + DATA_TRANSFER:
- case RNR + DATA_TRANSFER:
- lcp -> lcd_input_window =
- (lcp -> lcd_rsn + 1) % MODULUS;
- SPR(xp, lcp -> lcd_input_window);
- lcp -> lcd_last_transmitted_pr = lcp -> lcd_input_window;
- break;
-
- case RESET + DATA_TRANSFER:
- lcp -> lcd_reset_condition = TRUE;
- break;
-
- case RESET_CONF + DATA_TRANSFER:
- lcp -> lcd_reset_condition = FALSE;
- break;
-
- /*
- * A restart should be only generated internally. Therefore
- * all logic for restart is in the pk_restart routine.
- */
- case RESTART + READY:
- lcp -> lcd_timer = pk_t20;
- break;
-
- /*
- * Restarts are all handled internally. Therefore all the
- * logic for the incoming restart packet is handled in the
- * pk_input routine.
- */
- case RESTART_CONF + READY:
- break;
-
- default:
- m_freem (m);
- return;
- }
-
- /* Trace the packet. */
- pk_trace (pkp -> pk_xcp, m, "P-Out");
-
- /* Pass the packet on down to the link layer */
- if (pk_input_cache.mbc_size || pk_input_cache.mbc_oldsize) {
- m->m_flags |= 0x08;
- mbuf_cache(&pk_input_cache, m);
- }
- (*pkp -> pk_lloutput) (pkp -> pk_llnext, m, pkp -> pk_rt);
- }
-}
-
-/*
- * This procedure returns the next packet to send or null. A
- * packet is composed of one or more mbufs.
- */
-
-struct mbuf *
-nextpk (lcp)
-struct pklcd *lcp;
-{
- register struct mbuf *m, *n;
- struct socket *so = lcp -> lcd_so;
- register struct sockbuf *sb = & (so ? so -> so_snd : lcp -> lcd_sb);
-
- if (lcp -> lcd_template) {
- m = lcp -> lcd_template;
- lcp -> lcd_template = NULL;
- } else {
- if (lcp -> lcd_rnr_condition || lcp -> lcd_window_condition ||
- lcp -> lcd_reset_condition)
- return (NULL);
-
- if ((m = sb -> sb_mb) == 0)
- return (NULL);
-
- sb -> sb_mb = m -> m_nextpkt;
- m->m_act = 0;
- for (n = m; n; n = n -> m_next)
- sbfree (sb, n);
- }
- return (m);
-}
projects / apple / xnu.git / blobdiff