146686Sbrian/*- 246686Sbrian * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> 346686Sbrian * All rights reserved. 446686Sbrian * 546686Sbrian * Redistribution and use in source and binary forms, with or without 646686Sbrian * modification, are permitted provided that the following conditions 746686Sbrian * are met: 846686Sbrian * 1. Redistributions of source code must retain the above copyright 946686Sbrian * notice, this list of conditions and the following disclaimer. 1046686Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1146686Sbrian * notice, this list of conditions and the following disclaimer in the 1246686Sbrian * documentation and/or other materials provided with the distribution. 1346686Sbrian * 1446686Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1546686Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1646686Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1746686Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1846686Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1946686Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2046686Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2146686Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2246686Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2346686Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2446686Sbrian * SUCH DAMAGE. 2546686Sbrian * 2650479Speter * $FreeBSD$ 2746686Sbrian */ 2846686Sbrian 2946686Sbrian#include <sys/types.h> 3046686Sbrian 3146686Sbrian#include <stdio.h> 3246686Sbrian#include <termios.h> 3346686Sbrian 3446686Sbrian#include "layer.h" 3546686Sbrian#include "acf.h" 3646686Sbrian#include "defs.h" 3747061Sbrian#include "log.h" 3846686Sbrian#include "timer.h" 3946686Sbrian#include "fsm.h" 4046686Sbrian#include "mbuf.h" 4146686Sbrian#include "proto.h" 4246686Sbrian#include "throughput.h" 4346686Sbrian#include "lqr.h" 4446686Sbrian#include "hdlc.h" 4563484Sbrian#include "lcp.h" 4646686Sbrian#include "ccp.h" 4746686Sbrian#include "link.h" 4846686Sbrian 4946686Sbrianint 5046686Sbrianproto_WrapperOctets(struct lcp *lcp, u_short proto) 5146686Sbrian{ 5246686Sbrian return (lcp->his_protocomp && !(proto & 0xff00)) ? 1 : 2; 5346686Sbrian} 5446686Sbrian 5546686Sbrianstruct mbuf * 5646686Sbrianproto_Prepend(struct mbuf *bp, u_short proto, unsigned comp, int extra) 5746686Sbrian{ 5846686Sbrian u_char cp[2]; 5946686Sbrian 6046686Sbrian cp[0] = proto >> 8; 6146686Sbrian cp[1] = proto & 0xff; 6246686Sbrian 6346686Sbrian if (comp && cp[0] == 0) 6454912Sbrian bp = m_prepend(bp, cp + 1, 1, extra); 6546686Sbrian else 6654912Sbrian bp = m_prepend(bp, cp, 2, extra); 6746686Sbrian 6846686Sbrian return bp; 6946686Sbrian} 7046686Sbrian 7146686Sbrianstatic struct mbuf * 72134789Sbrianproto_LayerPush(struct bundle *b __unused, struct link *l, struct mbuf *bp, 73134789Sbrian int pri __unused, u_short *proto) 7446686Sbrian{ 7547061Sbrian log_Printf(LogDEBUG, "proto_LayerPush: Using 0x%04x\n", *proto); 7646686Sbrian bp = proto_Prepend(bp, *proto, l->lcp.his_protocomp, 7746686Sbrian acf_WrapperOctets(&l->lcp, *proto)); 7854912Sbrian m_settype(bp, MB_PROTOOUT); 7946686Sbrian link_ProtocolRecord(l, *proto, PROTO_OUT); 8046686Sbrian 8146686Sbrian return bp; 8246686Sbrian} 8346686Sbrian 8446686Sbrianstatic struct mbuf * 85134789Sbrianproto_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp, 8646686Sbrian u_short *proto) 8746686Sbrian{ 8846686Sbrian u_char cp[2]; 8946686Sbrian size_t got; 9046686Sbrian 9146686Sbrian if ((got = mbuf_View(bp, cp, 2)) == 0) { 9254912Sbrian m_freem(bp); 9346686Sbrian return NULL; 9446686Sbrian } 9546686Sbrian 9646686Sbrian *proto = cp[0]; 9746686Sbrian if (!(*proto & 1)) { 9846686Sbrian if (got == 1) { 9954912Sbrian m_freem(bp); 10046686Sbrian return NULL; 10146686Sbrian } 10246686Sbrian bp = mbuf_Read(bp, cp, 2); 10346686Sbrian *proto = (*proto << 8) | cp[1]; 10446686Sbrian } else 10546686Sbrian bp = mbuf_Read(bp, cp, 1); 10646686Sbrian 10747061Sbrian log_Printf(LogDEBUG, "proto_LayerPull: unknown -> 0x%04x\n", *proto); 10854912Sbrian m_settype(bp, MB_PROTOIN); 10946686Sbrian link_ProtocolRecord(l, *proto, PROTO_IN); 11046686Sbrian 11146686Sbrian return bp; 11246686Sbrian} 11346686Sbrian 11446686Sbrianstruct layer protolayer = 11546686Sbrian { LAYER_PROTO, "proto", proto_LayerPush, proto_LayerPull }; 116