de3feff3f8
structures (well, they're treated as opaque). It's now possible to manage IPv6 interface addresses and routing table entries and to filter IPV6 traffic whether encapsulated or not. IPV6CP support is crude for now, and hasn't been tested against any other implementations. RADIUS and IPv6 are independent of eachother for now. ppp.linkup/ppp.linkdown aren't currently used by IPV6CP o Understand all protocols(5) in filter rules rather than only a select few. o Allow a mask specification for the ``delete'' command. It's now possible to specifically delete one of two conflicting routes. o When creating and deleting proxy arp entries, do it for all IPv4 interface addresses rather than doing it just for the ``current'' peer address. o When iface-alias isn't in effect, don't blow away manually (via ``iface add'') added interface addresses. o When listening on a tcp server (diagnostic) socket, bind so that a tcp46 socket is created -- allowing both IPv4 and IPv6 connections. o When displaying ICMP traffic, don't display the icmp type twice. When display traffic, display at least some information about unrecognised traffic. o Bump version Inspired after filtering work by: Makoto MATSUSHITA <matusita@jp.FreeBSD.org>
440 lines
15 KiB
C
440 lines
15 KiB
C
/*-
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* Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
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* based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
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* Internet Initiative Japan, Inc (IIJ)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/un.h>
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#include <stdio.h>
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#include <string.h>
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#include <termios.h>
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#include "defs.h"
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#include "layer.h"
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#include "command.h"
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#include "mbuf.h"
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#include "log.h"
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#include "timer.h"
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#include "fsm.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "throughput.h"
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#include "auth.h"
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#include "lcp.h"
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#include "async.h"
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#include "ccp.h"
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#include "link.h"
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#include "descriptor.h"
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#include "chap.h"
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#include "physical.h"
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#include "prompt.h"
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#include "chat.h"
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#include "mp.h"
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#include "cbcp.h"
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#include "datalink.h"
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static u_int16_t const fcstab[256] = {
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/* 00 */ 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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/* 08 */ 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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/* 10 */ 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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/* 18 */ 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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/* 20 */ 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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/* 28 */ 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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/* 30 */ 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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/* 38 */ 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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/* 40 */ 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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/* 48 */ 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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/* 50 */ 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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/* 58 */ 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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/* 60 */ 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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/* 68 */ 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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/* 70 */ 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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/* 78 */ 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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/* 80 */ 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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/* 88 */ 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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/* 90 */ 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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/* 98 */ 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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/* a0 */ 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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/* a8 */ 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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/* b0 */ 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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/* b8 */ 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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/* c0 */ 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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/* c8 */ 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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/* d0 */ 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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/* d8 */ 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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/* e0 */ 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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/* e8 */ 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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/* f0 */ 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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/* f8 */ 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
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};
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void
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hdlc_Init(struct hdlc *hdlc, struct lcp *lcp)
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{
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memset(hdlc, '\0', sizeof(struct hdlc));
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hdlc->lqm.owner = lcp;
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}
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/*
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* HDLC FCS computation. Read RFC 1171 Appendix B and CCITT X.25 section
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* 2.27 for further details.
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*/
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u_short
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hdlc_Fcs(u_char *cp, size_t len)
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{
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u_short fcs = INITFCS;
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while (len--)
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fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff];
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return fcs;
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}
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static inline u_short
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HdlcFcsBuf(u_short fcs, struct mbuf *m)
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{
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int len;
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u_char *pos, *end;
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len = m_length(m);
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pos = MBUF_CTOP(m);
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end = pos + m->m_len;
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while (len--) {
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fcs = (fcs >> 8) ^ fcstab[(fcs ^ *pos++) & 0xff];
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if (pos == end && len) {
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m = m->m_next;
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pos = MBUF_CTOP(m);
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end = pos + m->m_len;
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}
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}
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return (fcs);
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}
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int
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hdlc_WrapperOctets(struct lcp *lcp, u_short proto)
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{
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return 2;
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}
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static struct mbuf *
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hdlc_LayerPush(struct bundle *bundle, struct link *l, struct mbuf *bp,
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int pri, u_short *proto)
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{
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struct mbuf *last;
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u_char *cp;
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u_short fcs;
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m_settype(bp, MB_HDLCOUT);
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fcs = HdlcFcsBuf(INITFCS, bp);
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fcs = ~fcs;
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for (last = bp; last->m_next; last = last->m_next)
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;
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if (last->m_size - last->m_offset - last->m_len >= 2) {
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cp = MBUF_CTOP(last) + last->m_len;
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last->m_len += 2;
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} else {
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struct mbuf *tail = m_get(2, MB_HDLCOUT);
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last->m_next = tail;
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cp = MBUF_CTOP(tail);
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}
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*cp++ = fcs & 0377; /* Low byte first (nothing like consistency) */
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*cp++ = fcs >> 8;
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log_DumpBp(LogHDLC, "hdlc_Output", bp);
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return bp;
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}
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/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
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static struct {
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u_short from;
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u_short to;
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const char *name;
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} protocols[] = {
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{ 0x0001, 0x0001, "Padding Protocol" },
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{ 0x0003, 0x001f, "reserved (transparency inefficient)" },
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{ 0x0021, 0x0021, "Internet Protocol" },
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{ 0x0023, 0x0023, "OSI Network Layer" },
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{ 0x0025, 0x0025, "Xerox NS IDP" },
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{ 0x0027, 0x0027, "DECnet Phase IV" },
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{ 0x0029, 0x0029, "Appletalk" },
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{ 0x002b, 0x002b, "Novell IPX" },
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{ 0x002d, 0x002d, "Van Jacobson Compressed TCP/IP" },
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{ 0x002f, 0x002f, "Van Jacobson Uncompressed TCP/IP" },
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{ 0x0031, 0x0031, "Bridging PDU" },
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{ 0x0033, 0x0033, "Stream Protocol (ST-II)" },
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{ 0x0035, 0x0035, "Banyan Vines" },
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{ 0x0037, 0x0037, "reserved (until 1993)" },
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{ 0x0039, 0x0039, "AppleTalk EDDP" },
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{ 0x003b, 0x003b, "AppleTalk SmartBuffered" },
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{ 0x003d, 0x003d, "Multi-Link" },
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{ 0x003f, 0x003f, "NETBIOS Framing" },
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{ 0x0041, 0x0041, "Cisco Systems" },
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{ 0x0043, 0x0043, "Ascom Timeplex" },
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{ 0x0045, 0x0045, "Fujitsu Link Backup and Load Balancing (LBLB)" },
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{ 0x0047, 0x0047, "DCA Remote Lan" },
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{ 0x0049, 0x0049, "Serial Data Transport Protocol (PPP-SDTP)" },
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{ 0x004b, 0x004b, "SNA over 802.2" },
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{ 0x004d, 0x004d, "SNA" },
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{ 0x004f, 0x004f, "IP6 Header Compression" },
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{ 0x0051, 0x0051, "KNX Bridging Data" },
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{ 0x0053, 0x0053, "Encryption" },
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{ 0x0055, 0x0055, "Individual Link Encryption" },
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{ 0x0057, 0x0057, "Internet Protocol V6" },
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{ 0x006f, 0x006f, "Stampede Bridging" },
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{ 0x0071, 0x0071, "BAP Bandwidth Allocation Protocol" },
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{ 0x0073, 0x0073, "MP+ Protocol" },
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{ 0x007d, 0x007d, "reserved (Control Escape)" },
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{ 0x007f, 0x007f, "reserved (compression inefficient)" },
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{ 0x00cf, 0x00cf, "reserved (PPP NLPID)" },
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{ 0x00fb, 0x00fb, "compression on single link in multilink group" },
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{ 0x00fd, 0x00fd, "1st choice compression" },
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{ 0x00ff, 0x00ff, "reserved (compression inefficient)" },
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{ 0x0200, 0x02ff, "(compression inefficient)" },
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{ 0x0201, 0x0201, "802.1d Hello Packets" },
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{ 0x0203, 0x0203, "IBM Source Routing BPDU" },
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{ 0x0205, 0x0205, "DEC LANBridge100 Spanning Tree" },
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{ 0x0207, 0x0207, "Cisco Discovery Protocol" },
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{ 0x0209, 0x0209, "Netcs Twin Routing" },
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{ 0x0231, 0x0231, "Luxcom" },
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{ 0x0233, 0x0233, "Sigma Network Systems" },
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{ 0x0235, 0x0235, "Apple Client Server Protocol" },
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{ 0x1e00, 0x1eff, "(compression inefficient)" },
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{ 0x4001, 0x4001, "Cray Communications Control Protocol" },
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{ 0x4003, 0x4003, "CDPD Mobile Network Registration Protocol" },
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{ 0x4021, 0x4021, "Stacker LZS" },
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{ 0x8001, 0x801f, "Not Used - reserved" },
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{ 0x8021, 0x8021, "Internet Protocol Control Protocol" },
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{ 0x8023, 0x8023, "OSI Network Layer Control Protocol" },
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{ 0x8025, 0x8025, "Xerox NS IDP Control Protocol" },
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{ 0x8027, 0x8027, "DECnet Phase IV Control Protocol" },
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{ 0x8029, 0x8029, "Appletalk Control Protocol" },
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{ 0x802b, 0x802b, "Novell IPX Control Protocol" },
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{ 0x802d, 0x802d, "reserved" },
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{ 0x802f, 0x802f, "reserved" },
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{ 0x8031, 0x8031, "Bridging NCP" },
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{ 0x8033, 0x8033, "Stream Protocol Control Protocol" },
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{ 0x8035, 0x8035, "Banyan Vines Control Protocol" },
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{ 0x8037, 0x8037, "reserved till 1993" },
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{ 0x8039, 0x8039, "reserved" },
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{ 0x803b, 0x803b, "reserved" },
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{ 0x803d, 0x803d, "Multi-Link Control Protocol" },
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{ 0x803f, 0x803f, "NETBIOS Framing Control Protocol" },
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{ 0x8041, 0x8041, "Cisco Systems Control Protocol" },
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{ 0x8043, 0x8043, "Ascom Timeplex" },
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{ 0x8045, 0x8045, "Fujitsu LBLB Control Protocol" },
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{ 0x8047, 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" },
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{ 0x8049, 0x8049, "Serial Data Control Protocol (PPP-SDCP)" },
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{ 0x804b, 0x804b, "SNA over 802.2 Control Protocol" },
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{ 0x804d, 0x804d, "SNA Control Protocol" },
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{ 0x804f, 0x804f, "IP6 Header Compression Control Protocol" },
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{ 0x8051, 0x8051, "KNX Bridging Control Protocol" },
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{ 0x8053, 0x8053, "Encryption Control Protocol" },
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{ 0x8055, 0x8055, "Individual Link Encryption Control Protocol" },
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{ 0x8057, 0x8057, "Internet Protocol V6 Control Protocol" },
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{ 0x806f, 0x806f, "Stampede Bridging Control Protocol" },
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{ 0x8073, 0x8073, "MP+ Control Protocol" },
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{ 0x8071, 0x8071, "BACP Bandwidth Allocation Control Protocol" },
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{ 0x807d, 0x807d, "Not Used - reserved" },
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{ 0x80cf, 0x80cf, "Not Used - reserved" },
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{ 0x80fb, 0x80fb, "compression on single link in multilink group control" },
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{ 0x80fd, 0x80fd, "Compression Control Protocol" },
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{ 0x80ff, 0x80ff, "Not Used - reserved" },
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{ 0x8207, 0x8207, "Cisco Discovery Protocol Control" },
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{ 0x8209, 0x8209, "Netcs Twin Routing" },
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{ 0x8235, 0x8235, "Apple Client Server Protocol Control" },
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{ 0xc021, 0xc021, "Link Control Protocol" },
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{ 0xc023, 0xc023, "Password Authentication Protocol" },
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{ 0xc025, 0xc025, "Link Quality Report" },
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{ 0xc027, 0xc027, "Shiva Password Authentication Protocol" },
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{ 0xc029, 0xc029, "CallBack Control Protocol (CBCP)" },
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{ 0xc081, 0xc081, "Container Control Protocol" },
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{ 0xc223, 0xc223, "Challenge Handshake Authentication Protocol" },
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{ 0xc225, 0xc225, "RSA Authentication Protocol" },
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{ 0xc227, 0xc227, "Extensible Authentication Protocol" },
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{ 0xc26f, 0xc26f, "Stampede Bridging Authorization Protocol" },
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{ 0xc281, 0xc281, "Proprietary Authentication Protocol" },
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{ 0xc283, 0xc283, "Proprietary Authentication Protocol" },
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{ 0xc481, 0xc481, "Proprietary Node ID Authentication Protocol" }
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};
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#define NPROTOCOLS (sizeof protocols/sizeof protocols[0])
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const char *
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hdlc_Protocol2Nam(u_short proto)
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{
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int f;
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for (f = 0; f < NPROTOCOLS; f++)
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if (proto >= protocols[f].from && proto <= protocols[f].to)
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return protocols[f].name;
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else if (proto < protocols[f].from)
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break;
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return "unrecognised protocol";
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}
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static struct mbuf *
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hdlc_LayerPull(struct bundle *b, struct link *l, struct mbuf *bp,
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u_short *proto)
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{
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struct physical *p = link2physical(l);
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u_short fcs;
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int len;
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|
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if (!p) {
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log_Printf(LogERROR, "Can't Pull a hdlc packet from a logical link\n");
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return bp;
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}
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log_DumpBp(LogHDLC, "hdlc_LayerPull:", bp);
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fcs = hdlc_Fcs(MBUF_CTOP(bp), bp->m_len);
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log_Printf(LogDEBUG, "%s: hdlc_LayerPull: fcs = %04x (%s)\n",
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p->link.name, fcs, (fcs == GOODFCS) ? "good" : "BAD!");
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if (fcs != GOODFCS) {
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p->hdlc.lqm.SaveInErrors++;
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p->hdlc.stats.badfcs++;
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m_freem(bp);
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return NULL;
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}
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p->hdlc.lqm.SaveInOctets += bp->m_len + 1;
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p->hdlc.lqm.SaveInPackets++;
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len = m_length(bp);
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if (len < 4) { /* rfc1662 section 4.3 */
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m_freem(bp);
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bp = NULL;
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}
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bp = m_adj(bp, -2); /* discard the FCS */
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m_settype(bp, MB_HDLCIN);
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return bp;
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}
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/* Detect a HDLC frame */
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static const struct frameheader {
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const u_char *data;
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int len;
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} FrameHeaders[] = {
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{ "\176\377\003\300\041", 5 },
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{ "\176\377\175\043\300\041", 6 },
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{ "\176\177\175\043\100\041", 6 },
|
|
{ "\176\175\337\175\043\300\041", 7 },
|
|
{ "\176\175\137\175\043\100\041", 7 },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
int
|
|
hdlc_Detect(u_char const **cp, int n, int issync)
|
|
{
|
|
const struct frameheader *fh;
|
|
const u_char *h;
|
|
size_t len, cmp;
|
|
|
|
while (n) {
|
|
for (fh = FrameHeaders; fh->len; fh++) {
|
|
h = issync ? fh->data + 1 : fh->data;
|
|
len = issync ? fh->len - 1 : fh->len;
|
|
cmp = n >= len ? len : n;
|
|
if (memcmp(*cp, h, cmp) == 0)
|
|
return cmp == len;
|
|
}
|
|
n--;
|
|
(*cp)++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
hdlc_ReportStatus(struct cmdargs const *arg)
|
|
{
|
|
struct hdlc *hdlc = &arg->cx->physical->hdlc;
|
|
|
|
prompt_Printf(arg->prompt, "%s HDLC level errors:\n", arg->cx->name);
|
|
prompt_Printf(arg->prompt, " Bad Frame Check Sequence fields: %u\n",
|
|
hdlc->stats.badfcs);
|
|
prompt_Printf(arg->prompt, " Bad address (!= 0x%02x) fields: %u\n",
|
|
HDLC_ADDR, hdlc->stats.badaddr);
|
|
prompt_Printf(arg->prompt, " Bad command (!= 0x%02x) fields: %u\n",
|
|
HDLC_UI, hdlc->stats.badcommand);
|
|
prompt_Printf(arg->prompt, " Unrecognised protocol fields: %u\n",
|
|
hdlc->stats.unknownproto);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
hdlc_ReportTime(void *v)
|
|
{
|
|
/* Moan about HDLC errors */
|
|
struct hdlc *hdlc = (struct hdlc *)v;
|
|
|
|
timer_Stop(&hdlc->ReportTimer);
|
|
|
|
if (memcmp(&hdlc->laststats, &hdlc->stats, sizeof hdlc->stats)) {
|
|
log_Printf(LogPHASE,
|
|
"%s: HDLC errors -> FCS: %u, ADDR: %u, COMD: %u, PROTO: %u\n",
|
|
hdlc->lqm.owner->fsm.link->name,
|
|
hdlc->stats.badfcs - hdlc->laststats.badfcs,
|
|
hdlc->stats.badaddr - hdlc->laststats.badaddr,
|
|
hdlc->stats.badcommand - hdlc->laststats.badcommand,
|
|
hdlc->stats.unknownproto - hdlc->laststats.unknownproto);
|
|
hdlc->laststats = hdlc->stats;
|
|
}
|
|
|
|
timer_Start(&hdlc->ReportTimer);
|
|
}
|
|
|
|
void
|
|
hdlc_StartTimer(struct hdlc *hdlc)
|
|
{
|
|
timer_Stop(&hdlc->ReportTimer);
|
|
hdlc->ReportTimer.load = 60 * SECTICKS;
|
|
hdlc->ReportTimer.arg = hdlc;
|
|
hdlc->ReportTimer.func = hdlc_ReportTime;
|
|
hdlc->ReportTimer.name = "hdlc";
|
|
timer_Start(&hdlc->ReportTimer);
|
|
}
|
|
|
|
void
|
|
hdlc_StopTimer(struct hdlc *hdlc)
|
|
{
|
|
timer_Stop(&hdlc->ReportTimer);
|
|
}
|
|
|
|
struct layer hdlclayer = { LAYER_HDLC, "hdlc", hdlc_LayerPush, hdlc_LayerPull };
|