2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/types.h>
44 #include "throughput.h"
52 proto_WrapperOctets(struct lcp *lcp, u_short proto)
54 return (lcp->his_protocomp && !(proto & 0xff00)) ? 1 : 2;
58 proto_Prepend(struct mbuf *bp, u_short proto, unsigned comp, int extra)
65 if (comp && cp[0] == 0)
66 bp = m_prepend(bp, cp + 1, 1, extra);
68 bp = m_prepend(bp, cp, 2, extra);
74 proto_LayerPush(struct bundle *b __unused, struct link *l, struct mbuf *bp,
75 int pri __unused, u_short *proto)
77 log_Printf(LogDEBUG, "proto_LayerPush: Using 0x%04x\n", *proto);
78 bp = proto_Prepend(bp, *proto, l->lcp.his_protocomp,
79 acf_WrapperOctets(&l->lcp, *proto));
80 m_settype(bp, MB_PROTOOUT);
81 link_ProtocolRecord(l, *proto, PROTO_OUT);
87 proto_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp,
93 if ((got = mbuf_View(bp, cp, 2)) == 0) {
104 bp = mbuf_Read(bp, cp, 2);
105 *proto = (*proto << 8) | cp[1];
107 bp = mbuf_Read(bp, cp, 1);
109 log_Printf(LogDEBUG, "proto_LayerPull: unknown -> 0x%04x\n", *proto);
110 m_settype(bp, MB_PROTOIN);
111 link_ProtocolRecord(l, *proto, PROTO_IN);
116 struct layer protolayer =
117 { LAYER_PROTO, "proto", proto_LayerPush, proto_LayerPull };