178189Sbrian/*- 278189Sbrian * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> 378189Sbrian * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> 478189Sbrian * Internet Initiative Japan, Inc (IIJ) 578189Sbrian * All rights reserved. 66059Samurai * 778189Sbrian * Redistribution and use in source and binary forms, with or without 878189Sbrian * modification, are permitted provided that the following conditions 978189Sbrian * are met: 1078189Sbrian * 1. Redistributions of source code must retain the above copyright 1178189Sbrian * notice, this list of conditions and the following disclaimer. 1278189Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1378189Sbrian * notice, this list of conditions and the following disclaimer in the 1478189Sbrian * documentation and/or other materials provided with the distribution. 156059Samurai * 1678189Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1778189Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1878189Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1978189Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2078189Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2178189Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2278189Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2378189Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2478189Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2578189Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2678189Sbrian * SUCH DAMAGE. 276059Samurai * 2850479Speter * $FreeBSD$ 296059Samurai */ 3078189Sbrian 3143313Sbrian#include <sys/param.h> 3230715Sbrian#include <netinet/in.h> 3330715Sbrian#include <netinet/in_systm.h> 3430715Sbrian#include <netinet/ip.h> 3581634Sbrian#include <sys/socket.h> 3636285Sbrian#include <sys/un.h> 3730715Sbrian 3831061Sbrian#include <stdio.h> 3949472Sbrian#include <string.h> /* strlen/memcpy */ 4046686Sbrian#include <termios.h> 4130715Sbrian 4246686Sbrian#include "layer.h" 4330715Sbrian#include "mbuf.h" 4430715Sbrian#include "log.h" 4530715Sbrian#include "timer.h" 466059Samurai#include "fsm.h" 4746686Sbrian#include "proto.h" 486059Samurai#include "slcompress.h" 4936285Sbrian#include "lqr.h" 506059Samurai#include "hdlc.h" 5136285Sbrian#include "defs.h" 5236285Sbrian#include "iplist.h" 5336285Sbrian#include "throughput.h" 5481634Sbrian#include "ncpaddr.h" 556059Samurai#include "ipcp.h" 5636285Sbrian#include "lcp.h" 5736285Sbrian#include "ccp.h" 5836285Sbrian#include "link.h" 5936285Sbrian#include "filter.h" 6036285Sbrian#include "descriptor.h" 6136285Sbrian#include "mp.h" 6243313Sbrian#ifndef NORADIUS 6343313Sbrian#include "radius.h" 6443313Sbrian#endif 6581634Sbrian#include "ipv6cp.h" 6681634Sbrian#include "ncp.h" 6736285Sbrian#include "bundle.h" 6830715Sbrian#include "vjcomp.h" 696059Samurai 7028679Sbrian#define MAX_VJHEADER 16 /* Maximum size of compressed header */ 716059Samurai 7246686Sbrianstatic struct mbuf * 73134789Sbrianvj_LayerPush(struct bundle *bundle, struct link *l __unused, struct mbuf *bp, 74134789Sbrian int pri __unused, u_short *proto) 756059Samurai{ 766059Samurai int type; 7745103Sbrian struct ip *pip; 7836285Sbrian u_short cproto = bundle->ncp.ipcp.peer_compproto >> 16; 796059Samurai 8054912Sbrian bp = m_pullup(bp); 8145103Sbrian pip = (struct ip *)MBUF_CTOP(bp); 8246686Sbrian if (*proto == PROTO_IP && pip->ip_p == IPPROTO_TCP && 8346686Sbrian cproto == PROTO_VJCOMP) { 8445103Sbrian type = sl_compress_tcp(bp, pip, &bundle->ncp.ipcp.vj.cslc, 8536285Sbrian &bundle->ncp.ipcp.vj.slstat, 8636285Sbrian bundle->ncp.ipcp.peer_compproto & 0xff); 8746686Sbrian log_Printf(LogDEBUG, "vj_LayerWrite: type = %x\n", type); 886059Samurai switch (type) { 896059Samurai case TYPE_IP: 906059Samurai break; 9146686Sbrian 926059Samurai case TYPE_UNCOMPRESSED_TCP: 9346686Sbrian *proto = PROTO_VJUNCOMP; 9447061Sbrian log_Printf(LogDEBUG, "vj_LayerPush: PROTO_IP -> PROTO_VJUNCOMP\n"); 9554912Sbrian m_settype(bp, MB_VJOUT); 966059Samurai break; 9746686Sbrian 986059Samurai case TYPE_COMPRESSED_TCP: 9946686Sbrian *proto = PROTO_VJCOMP; 10047061Sbrian log_Printf(LogDEBUG, "vj_LayerPush: PROTO_IP -> PROTO_VJUNCOMP\n"); 10154912Sbrian m_settype(bp, MB_VJOUT); 1026059Samurai break; 10346686Sbrian 1046059Samurai default: 10547061Sbrian log_Printf(LogERROR, "vj_LayerPush: Unknown frame type %x\n", type); 10654912Sbrian m_freem(bp); 10746686Sbrian return NULL; 1086059Samurai } 10946686Sbrian } 11036285Sbrian 11146686Sbrian return bp; 1126059Samurai} 1136059Samurai 1146059Samuraistatic struct mbuf * 11546828SbrianVjUncompressTcp(struct ipcp *ipcp, struct mbuf *bp, u_char type) 1166059Samurai{ 1176059Samurai u_char *bufp; 1186059Samurai int len, olen, rlen; 11928679Sbrian u_char work[MAX_HDR + MAX_VJHEADER]; /* enough to hold TCP/IP header */ 1206059Samurai 12154912Sbrian bp = m_pullup(bp); 12254912Sbrian olen = len = m_length(bp); 1236059Samurai if (type == TYPE_UNCOMPRESSED_TCP) { 1246059Samurai /* 12528679Sbrian * Uncompressed packet does NOT change its size, so that we can use mbuf 12628679Sbrian * space for uncompression job. 1276059Samurai */ 1286059Samurai bufp = MBUF_CTOP(bp); 12936960Sbrian len = sl_uncompress_tcp(&bufp, len, type, &ipcp->vj.cslc, &ipcp->vj.slstat, 13036960Sbrian (ipcp->my_compproto >> 8) & 255); 1316735Samurai if (len <= 0) { 13254912Sbrian m_freem(bp); 13332663Sbrian bp = NULL; 13447695Sbrian } else 13554912Sbrian m_settype(bp, MB_VJIN); 13646686Sbrian return bp; 1376059Samurai } 13828679Sbrian 1396059Samurai /* 14028679Sbrian * Handle compressed packet. 1) Read upto MAX_VJHEADER bytes into work 14193465Sbrian * space. 2) Try to uncompress it. 3) Compute amount of necessary space. 4) 14228679Sbrian * Copy unread data info there. 1436059Samurai */ 14428679Sbrian if (len > MAX_VJHEADER) 14528679Sbrian len = MAX_VJHEADER; 1466059Samurai rlen = len; 1476059Samurai bufp = work + MAX_HDR; 14836285Sbrian bp = mbuf_Read(bp, bufp, rlen); 14936960Sbrian len = sl_uncompress_tcp(&bufp, olen, type, &ipcp->vj.cslc, &ipcp->vj.slstat, 15036960Sbrian (ipcp->my_compproto >> 8) & 255); 1516735Samurai if (len <= 0) { 15254912Sbrian m_freem(bp); 15332663Sbrian return NULL; 1546735Samurai } 1556059Samurai len -= olen; 1566059Samurai len += rlen; 15754913Sbrian 15854913Sbrian bp = m_prepend(bp, bufp, len, 0); 15954912Sbrian m_settype(bp, MB_VJIN); 16054913Sbrian 16154913Sbrian return bp; 1626059Samurai} 1636059Samurai 16446686Sbrianstatic struct mbuf * 165134789Sbrianvj_LayerPull(struct bundle *bundle, struct link *l __unused, struct mbuf *bp, 16646686Sbrian u_short *proto) 1676059Samurai{ 1686059Samurai u_char type; 1696059Samurai 17046686Sbrian switch (*proto) { 1716059Samurai case PROTO_VJCOMP: 1726059Samurai type = TYPE_COMPRESSED_TCP; 17347061Sbrian log_Printf(LogDEBUG, "vj_LayerPull: PROTO_VJCOMP -> PROTO_IP\n"); 1746059Samurai break; 1756059Samurai case PROTO_VJUNCOMP: 1766059Samurai type = TYPE_UNCOMPRESSED_TCP; 17747061Sbrian log_Printf(LogDEBUG, "vj_LayerPull: PROTO_VJUNCOMP -> PROTO_IP\n"); 1786059Samurai break; 1796059Samurai default: 18046686Sbrian return bp; 1816059Samurai } 18246686Sbrian 18346686Sbrian *proto = PROTO_IP; 18446686Sbrian return VjUncompressTcp(&bundle->ncp.ipcp, bp, type); 1856059Samurai} 18631514Sbrian 18731514Sbrianconst char * 18832439Sbrianvj2asc(u_int32_t val) 18931514Sbrian{ 19037010Sbrian static char asc[50]; /* The return value is used immediately */ 19131514Sbrian 19236285Sbrian if (val) 19346686Sbrian snprintf(asc, sizeof asc, "%d VJ slots with%s slot compression", 19446686Sbrian (int)((val>>8)&15)+1, val & 1 ? "" : "out"); 19536285Sbrian else 19636285Sbrian strcpy(asc, "VJ disabled"); 19731514Sbrian return asc; 19831514Sbrian} 19946686Sbrian 20046686Sbrianstruct layer vjlayer = { LAYER_VJ, "vj", vj_LayerPush, vj_LayerPull }; 201