hdlc.c revision 31537
16059Samurai/* 26059Samurai * PPP High Level Link Control (HDLC) Module 36059Samurai * 46059Samurai * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 56059Samurai * 66059Samurai * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. 76059Samurai * 86059Samurai * Redistribution and use in source and binary forms are permitted 96059Samurai * provided that the above copyright notice and this paragraph are 106059Samurai * duplicated in all such forms and that any documentation, 116059Samurai * advertising materials, and other materials related to such 126059Samurai * distribution and use acknowledge that the software was developed 136059Samurai * by the Internet Initiative Japan, Inc. The name of the 146059Samurai * IIJ may not be used to endorse or promote products derived 156059Samurai * from this software without specific prior written permission. 166059Samurai * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 176059Samurai * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 186059Samurai * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 198857Srgrimes * 2031537Sbrian * $Id: hdlc.c,v 1.23 1997/12/03 10:23:47 brian Exp $ 218857Srgrimes * 226059Samurai * TODO: 236059Samurai */ 2430715Sbrian#include <sys/param.h> 2530715Sbrian#include <netinet/in.h> 2630715Sbrian 2730715Sbrian#include <stdio.h> 2830715Sbrian#include <string.h> 2930715Sbrian#include <termios.h> 3030715Sbrian 3131343Sbrian#include "command.h" 3230715Sbrian#include "mbuf.h" 3330715Sbrian#include "log.h" 3430715Sbrian#include "defs.h" 3530715Sbrian#include "timer.h" 366059Samurai#include "fsm.h" 376059Samurai#include "hdlc.h" 386059Samurai#include "lcpproto.h" 3930733Sbrian#include "ipcp.h" 4030733Sbrian#include "ip.h" 4130733Sbrian#include "vjcomp.h" 4230733Sbrian#include "pap.h" 4330733Sbrian#include "chap.h" 446059Samurai#include "lcp.h" 4531343Sbrian#include "async.h" 466059Samurai#include "lqr.h" 4726142Sbrian#include "loadalias.h" 486735Samurai#include "vars.h" 4913389Sphk#include "modem.h" 5013389Sphk#include "ccp.h" 516059Samurai 526059Samuraistruct hdlcstat { 5328679Sbrian int badfcs; 5428679Sbrian int badaddr; 5528679Sbrian int badcommand; 5628679Sbrian int unknownproto; 5728679Sbrian} HdlcStat; 586059Samurai 5930715Sbrianstatic int ifOutPackets; 6030715Sbrianstatic int ifOutOctets; 6130715Sbrianstatic int ifOutLQRs; 6230715Sbrianstatic int ifInPackets; 6330715Sbrianstatic int ifInOctets; 646059Samurai 656059Samuraistruct protostat { 666059Samurai u_short number; 6731343Sbrian const char *name; 686059Samurai u_long in_count; 696059Samurai u_long out_count; 7031537Sbrian} ProtocolStat[] = { 7131343Sbrian { PROTO_IP, "IP" }, 7231343Sbrian { PROTO_VJUNCOMP, "VJ_UNCOMP" }, 7331343Sbrian { PROTO_VJCOMP, "VJ_COMP" }, 7431343Sbrian { PROTO_COMPD, "COMPD" }, 7531343Sbrian { PROTO_LCP, "LCP" }, 7631343Sbrian { PROTO_IPCP, "IPCP" }, 7731343Sbrian { PROTO_CCP, "CCP" }, 7831343Sbrian { PROTO_PAP, "PAP" }, 7931343Sbrian { PROTO_LQR, "LQR" }, 8031343Sbrian { PROTO_CHAP, "CHAP" }, 8131343Sbrian { 0, "Others" } 826059Samurai}; 836059Samurai 8413760Sphkstatic u_short const fcstab[256] = { 8528679Sbrian /* 00 */ 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 8628679Sbrian /* 08 */ 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, 8728679Sbrian /* 10 */ 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 8828679Sbrian /* 18 */ 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, 8928679Sbrian /* 20 */ 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 9028679Sbrian /* 28 */ 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 9128679Sbrian /* 30 */ 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 9228679Sbrian /* 38 */ 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 9328679Sbrian /* 40 */ 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 9428679Sbrian /* 48 */ 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 9528679Sbrian /* 50 */ 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, 9628679Sbrian /* 58 */ 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 9728679Sbrian /* 60 */ 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 9828679Sbrian /* 68 */ 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, 9928679Sbrian /* 70 */ 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 10028679Sbrian /* 78 */ 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 10128679Sbrian /* 80 */ 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 10228679Sbrian /* 88 */ 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 10328679Sbrian /* 90 */ 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 10428679Sbrian /* 98 */ 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 10528679Sbrian /* a0 */ 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, 10628679Sbrian /* a8 */ 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 10728679Sbrian /* b0 */ 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, 10828679Sbrian /* b8 */ 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 10928679Sbrian /* c0 */ 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 11028679Sbrian /* c8 */ 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 11128679Sbrian /* d0 */ 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 11228679Sbrian /* d8 */ 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 11328679Sbrian /* e0 */ 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 11428679Sbrian /* e8 */ 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, 11528679Sbrian /* f0 */ 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 11628679Sbrian /* f8 */ 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 1176059Samurai}; 1186059Samurai 11928679Sbrianu_char EscMap[33]; 12028679Sbrian 1216059Samuraivoid 1226059SamuraiHdlcInit() 1236059Samurai{ 1246059Samurai ifInOctets = ifOutOctets = 0; 1256059Samurai ifInPackets = ifOutPackets = 0; 1266059Samurai ifOutLQRs = 0; 1276059Samurai} 1286059Samurai 1296059Samurai/* 1306059Samurai * HDLC FCS computation. Read RFC 1171 Appendix B and CCITT X.25 section 1316059Samurai * 2.27 for further details. 1326059Samurai */ 13328679Sbrianinline u_short 13428679SbrianHdlcFcs(u_short fcs, u_char * cp, int len) 1356059Samurai{ 1366059Samurai while (len--) 1376059Samurai fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff]; 13828679Sbrian return (fcs); 1396059Samurai} 1406059Samurai 14131514Sbrianinline u_short 14231514SbrianHdlcFcsBuf(u_short fcs, struct mbuf *m) 14331514Sbrian{ 14431514Sbrian int len; 14531514Sbrian u_char *pos, *end; 14631514Sbrian 14731514Sbrian len = plength(m); 14831514Sbrian pos = MBUF_CTOP(m); 14931514Sbrian end = pos + m->cnt; 15031514Sbrian while (len--) { 15131514Sbrian fcs = (fcs >> 8) ^ fcstab[(fcs ^ *pos++) & 0xff]; 15231514Sbrian if (pos == end && len) { 15331514Sbrian m = m->next; 15431514Sbrian pos = MBUF_CTOP(m); 15531514Sbrian end = pos + m->cnt; 15631514Sbrian } 15731514Sbrian } 15831514Sbrian return (fcs); 15931514Sbrian} 16031514Sbrian 1616059Samuraivoid 16228679SbrianHdlcOutput(int pri, u_short proto, struct mbuf * bp) 1636059Samurai{ 1646059Samurai struct mbuf *mhp, *mfcs; 1656059Samurai struct protostat *statp; 1666059Samurai struct lqrdata *lqr; 1676059Samurai u_char *cp; 1686059Samurai u_short fcs; 1696059Samurai 17031514Sbrian if ((proto & 0xfff1) == 0x21) /* Network Layer protocol */ 17131514Sbrian if (CcpFsm.state == ST_OPENED) 17231514Sbrian if (CcpOutput(pri, proto, bp)) 17329294Sbrian return; 17431514Sbrian 1756735Samurai if (DEV_IS_SYNC) 1766735Samurai mfcs = NULLBUFF; 1776735Samurai else 1786735Samurai mfcs = mballoc(2, MB_HDLCOUT); 17931514Sbrian 1806059Samurai mhp = mballoc(4, MB_HDLCOUT); 1816059Samurai mhp->cnt = 0; 1826059Samurai cp = MBUF_CTOP(mhp); 1836059Samurai if (proto == PROTO_LCP || LcpInfo.his_acfcomp == 0) { 1846059Samurai *cp++ = HDLC_ADDR; 1856059Samurai *cp++ = HDLC_UI; 1866059Samurai mhp->cnt += 2; 1876059Samurai } 18828679Sbrian 1896059Samurai /* 19028679Sbrian * If possible, compress protocol field. 1916059Samurai */ 1926059Samurai if (LcpInfo.his_protocomp && (proto & 0xff00) == 0) { 1936059Samurai *cp++ = proto; 1946059Samurai mhp->cnt++; 1956059Samurai } else { 1966059Samurai *cp++ = proto >> 8; 1976059Samurai *cp = proto & 0377; 1986059Samurai mhp->cnt += 2; 1996059Samurai } 2006059Samurai mhp->next = bp; 20131514Sbrian while (bp->next != NULL) 20231514Sbrian bp = bp->next; 2036059Samurai bp->next = mfcs; 20431514Sbrian bp = mhp->next; 2056059Samurai 2066059Samurai lqr = &MyLqrData; 2076059Samurai lqr->PeerOutPackets = ifOutPackets++; 2086059Samurai ifOutOctets += plength(mhp) + 1; 2096059Samurai lqr->PeerOutOctets = ifOutOctets; 2106059Samurai 2116059Samurai if (proto == PROTO_LQR) { 2126059Samurai lqr->MagicNumber = LcpInfo.want_magic; 2136059Samurai lqr->LastOutLQRs = HisLqrData.PeerOutLQRs; 2146059Samurai lqr->LastOutPackets = HisLqrData.PeerOutPackets; 2156059Samurai lqr->LastOutOctets = HisLqrData.PeerOutOctets; 2166059Samurai lqr->PeerInLQRs = HisLqrSave.SaveInLQRs; 2176059Samurai lqr->PeerInPackets = HisLqrSave.SaveInPackets; 2186059Samurai lqr->PeerInDiscards = HisLqrSave.SaveInDiscards; 2196059Samurai lqr->PeerInErrors = HisLqrSave.SaveInErrors; 2206059Samurai lqr->PeerInOctets = HisLqrSave.SaveInOctets; 2216059Samurai lqr->PeerOutLQRs = ++ifOutLQRs; 2226059Samurai LqrDump("LqrOutput", lqr); 22328679Sbrian LqrChangeOrder(lqr, (struct lqrdata *) (MBUF_CTOP(bp))); 2246059Samurai } 2256735Samurai if (!DEV_IS_SYNC) { 2266735Samurai fcs = HdlcFcs(INITFCS, MBUF_CTOP(mhp), mhp->cnt); 2276735Samurai fcs = HdlcFcs(fcs, MBUF_CTOP(bp), bp->cnt); 2286735Samurai fcs = ~fcs; 2296735Samurai cp = MBUF_CTOP(mfcs); 23028679Sbrian *cp++ = fcs & 0377; /* Low byte first!! */ 2316735Samurai *cp++ = fcs >> 8; 2326735Samurai } 23326516Sbrian LogDumpBp(LogHDLC, "HdlcOutput", mhp); 2346059Samurai for (statp = ProtocolStat; statp->number; statp++) 2356059Samurai if (statp->number == proto) 2366059Samurai break; 2376059Samurai statp->out_count++; 23831514Sbrian 23931514Sbrian LogPrintf(LogDEBUG, "HdlcOutput: proto = 0x%04x\n", proto); 24031514Sbrian 2416735Samurai if (DEV_IS_SYNC) 2426735Samurai ModemOutput(pri, mhp); 2436735Samurai else 2446735Samurai AsyncOutput(pri, mhp, proto); 2456059Samurai} 2466059Samurai 24731537Sbrian/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */ 24831537Sbrianstatic struct { 24931537Sbrian u_short from; 25031537Sbrian u_short to; 25131537Sbrian const char *name; 25231537Sbrian} protocols[] = { 25331537Sbrian { 0x0001, 0x0001, "Padding Protocol" }, 25431537Sbrian { 0x0003, 0x001f, "reserved (transparency inefficient)" }, 25531537Sbrian { 0x0021, 0x0021, "Internet Protocol" }, 25631537Sbrian { 0x0023, 0x0023, "OSI Network Layer" }, 25731537Sbrian { 0x0025, 0x0025, "Xerox NS IDP" }, 25831537Sbrian { 0x0027, 0x0027, "DECnet Phase IV" }, 25931537Sbrian { 0x0029, 0x0029, "Appletalk" }, 26031537Sbrian { 0x002b, 0x002b, "Novell IPX" }, 26131537Sbrian { 0x002d, 0x002d, "Van Jacobson Compressed TCP/IP" }, 26231537Sbrian { 0x002f, 0x002f, "Van Jacobson Uncompressed TCP/IP" }, 26331537Sbrian { 0x0031, 0x0031, "Bridging PDU" }, 26431537Sbrian { 0x0033, 0x0033, "Stream Protocol (ST-II)" }, 26531537Sbrian { 0x0035, 0x0035, "Banyan Vines" }, 26631537Sbrian { 0x0037, 0x0037, "reserved (until 1993)" }, 26731537Sbrian { 0x0039, 0x0039, "AppleTalk EDDP" }, 26831537Sbrian { 0x003b, 0x003b, "AppleTalk SmartBuffered" }, 26931537Sbrian { 0x003d, 0x003d, "Multi-Link" }, 27031537Sbrian { 0x003f, 0x003f, "NETBIOS Framing" }, 27131537Sbrian { 0x0041, 0x0041, "Cisco Systems" }, 27231537Sbrian { 0x0043, 0x0043, "Ascom Timeplex" }, 27331537Sbrian { 0x0045, 0x0045, "Fujitsu Link Backup and Load Balancing (LBLB)" }, 27431537Sbrian { 0x0047, 0x0047, "DCA Remote Lan" }, 27531537Sbrian { 0x0049, 0x0049, "Serial Data Transport Protocol (PPP-SDTP)" }, 27631537Sbrian { 0x004b, 0x004b, "SNA over 802.2" }, 27731537Sbrian { 0x004d, 0x004d, "SNA" }, 27831537Sbrian { 0x004f, 0x004f, "IP6 Header Compression" }, 27931537Sbrian { 0x0051, 0x0051, "KNX Bridging Data" }, 28031537Sbrian { 0x0053, 0x0053, "Encryption" }, 28131537Sbrian { 0x0055, 0x0055, "Individual Link Encryption" }, 28231537Sbrian { 0x006f, 0x006f, "Stampede Bridging" }, 28331537Sbrian { 0x0071, 0x0071, "BAP Bandwidth Allocation Protocol" }, 28431537Sbrian { 0x0073, 0x0073, "MP+ Protocol" }, 28531537Sbrian { 0x007d, 0x007d, "reserved (Control Escape)" }, 28631537Sbrian { 0x007f, 0x007f, "reserved (compression inefficient)" }, 28731537Sbrian { 0x00cf, 0x00cf, "reserved (PPP NLPID)" }, 28831537Sbrian { 0x00fb, 0x00fb, "compression on single link in multilink group" }, 28931537Sbrian { 0x00fd, 0x00fd, "1st choice compression" }, 29031537Sbrian { 0x00ff, 0x00ff, "reserved (compression inefficient)" }, 29131537Sbrian { 0x0200, 0x02ff, "(compression inefficient)" }, 29231537Sbrian { 0x0201, 0x0201, "802.1d Hello Packets" }, 29331537Sbrian { 0x0203, 0x0203, "IBM Source Routing BPDU" }, 29431537Sbrian { 0x0205, 0x0205, "DEC LANBridge100 Spanning Tree" }, 29531537Sbrian { 0x0207, 0x0207, "Cisco Discovery Protocol" }, 29631537Sbrian { 0x0209, 0x0209, "Netcs Twin Routing" }, 29731537Sbrian { 0x0231, 0x0231, "Luxcom" }, 29831537Sbrian { 0x0233, 0x0233, "Sigma Network Systems" }, 29931537Sbrian { 0x0235, 0x0235, "Apple Client Server Protocol" }, 30031537Sbrian { 0x1e00, 0x1eff, "(compression inefficient)" }, 30131537Sbrian { 0x4001, 0x4001, "Cray Communications Control Protocol" }, 30231537Sbrian { 0x4003, 0x4003, "CDPD Mobile Network Registration Protocol" }, 30331537Sbrian { 0x4021, 0x4021, "Stacker LZS" }, 30431537Sbrian { 0x8001, 0x801f, "Not Used - reserved" }, 30531537Sbrian { 0x8021, 0x8021, "Internet Protocol Control Protocol" }, 30631537Sbrian { 0x8023, 0x8023, "OSI Network Layer Control Protocol" }, 30731537Sbrian { 0x8025, 0x8025, "Xerox NS IDP Control Protocol" }, 30831537Sbrian { 0x8027, 0x8027, "DECnet Phase IV Control Protocol" }, 30931537Sbrian { 0x8029, 0x8029, "Appletalk Control Protocol" }, 31031537Sbrian { 0x802b, 0x802b, "Novell IPX Control Protocol" }, 31131537Sbrian { 0x802d, 0x802d, "reserved" }, 31231537Sbrian { 0x802f, 0x802f, "reserved" }, 31331537Sbrian { 0x8031, 0x8031, "Bridging NCP" }, 31431537Sbrian { 0x8033, 0x8033, "Stream Protocol Control Protocol" }, 31531537Sbrian { 0x8035, 0x8035, "Banyan Vines Control Protocol" }, 31631537Sbrian { 0x8037, 0x8037, "reserved till 1993" }, 31731537Sbrian { 0x8039, 0x8039, "reserved" }, 31831537Sbrian { 0x803b, 0x803b, "reserved" }, 31931537Sbrian { 0x803d, 0x803d, "Multi-Link Control Protocol" }, 32031537Sbrian { 0x803f, 0x803f, "NETBIOS Framing Control Protocol" }, 32131537Sbrian { 0x8041, 0x8041, "Cisco Systems Control Protocol" }, 32231537Sbrian { 0x8043, 0x8043, "Ascom Timeplex" }, 32331537Sbrian { 0x8045, 0x8045, "Fujitsu LBLB Control Protocol" }, 32431537Sbrian { 0x8047, 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" }, 32531537Sbrian { 0x8049, 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, 32631537Sbrian { 0x804b, 0x804b, "SNA over 802.2 Control Protocol" }, 32731537Sbrian { 0x804d, 0x804d, "SNA Control Protocol" }, 32831537Sbrian { 0x804f, 0x804f, "IP6 Header Compression Control Protocol" }, 32931537Sbrian { 0x8051, 0x8051, "KNX Bridging Control Protocol" }, 33031537Sbrian { 0x8053, 0x8053, "Encryption Control Protocol" }, 33131537Sbrian { 0x8055, 0x8055, "Individual Link Encryption Control Protocol" }, 33231537Sbrian { 0x806f, 0x806f, "Stampede Bridging Control Protocol" }, 33331537Sbrian { 0x8073, 0x8073, "MP+ Control Protocol" }, 33431537Sbrian { 0x8071, 0x8071, "BACP Bandwidth Allocation Control Protocol" }, 33531537Sbrian { 0x807d, 0x807d, "Not Used - reserved" }, 33631537Sbrian { 0x80cf, 0x80cf, "Not Used - reserved" }, 33731537Sbrian { 0x80fb, 0x80fb, "compression on single link in multilink group control" }, 33831537Sbrian { 0x80fd, 0x80fd, "Compression Control Protocol" }, 33931537Sbrian { 0x80ff, 0x80ff, "Not Used - reserved" }, 34031537Sbrian { 0x8207, 0x8207, "Cisco Discovery Protocol Control" }, 34131537Sbrian { 0x8209, 0x8209, "Netcs Twin Routing" }, 34231537Sbrian { 0x8235, 0x8235, "Apple Client Server Protocol Control" }, 34331537Sbrian { 0xc021, 0xc021, "Link Control Protocol" }, 34431537Sbrian { 0xc023, 0xc023, "Password Authentication Protocol" }, 34531537Sbrian { 0xc025, 0xc025, "Link Quality Report" }, 34631537Sbrian { 0xc027, 0xc027, "Shiva Password Authentication Protocol" }, 34731537Sbrian { 0xc029, 0xc029, "CallBack Control Protocol (CBCP)" }, 34831537Sbrian { 0xc081, 0xc081, "Container Control Protocol" }, 34931537Sbrian { 0xc223, 0xc223, "Challenge Handshake Authentication Protocol" }, 35031537Sbrian { 0xc225, 0xc225, "RSA Authentication Protocol" }, 35131537Sbrian { 0xc227, 0xc227, "Extensible Authentication Protocol" }, 35231537Sbrian { 0xc26f, 0xc26f, "Stampede Bridging Authorization Protocol" }, 35331537Sbrian { 0xc281, 0xc281, "Proprietary Authentication Protocol" }, 35431537Sbrian { 0xc283, 0xc283, "Proprietary Authentication Protocol" }, 35531537Sbrian { 0xc481, 0xc481, "Proprietary Node ID Authentication Protocol" } 35631537Sbrian}; 35731537Sbrian 35831537Sbrian#define NPROTOCOLS (sizeof(protocols)/sizeof(protocols[0])) 35931537Sbrian 36031537Sbrianstatic const char * 36131537SbrianProtocol2Nam(u_short proto) 36231537Sbrian{ 36331537Sbrian int f; 36431537Sbrian 36531537Sbrian for (f = 0; f < NPROTOCOLS; f++) 36631537Sbrian if (proto >= protocols[f].from && proto <= protocols[f].to) 36731537Sbrian return protocols[f].name; 36831537Sbrian else if (proto < protocols[f].from) 36931537Sbrian break; 37031537Sbrian return "unrecognised protocol"; 37131537Sbrian} 37231537Sbrian 37313379Sphkvoid 37428679SbrianDecodePacket(u_short proto, struct mbuf * bp) 3756059Samurai{ 3769448Samurai u_char *cp; 3779448Samurai 37831514Sbrian LogPrintf(LogDEBUG, "DecodePacket: proto = 0x%04x\n", proto); 37926516Sbrian 38031514Sbrian /* 38131514Sbrian * If proto isn't PROTO_COMPD, we still want to pass it to the 38231514Sbrian * decompression routines so that the dictionary's updated 38331514Sbrian */ 38431514Sbrian if (proto == PROTO_COMPD) { 38531514Sbrian if ((bp = CompdInput(&proto, bp)) == NULL) 38631514Sbrian return; 38731514Sbrian } else if ((proto & 0xfff1) == 0x21) /* Network Layer protocol */ 38831514Sbrian if (CcpFsm.state == ST_OPENED) 38931514Sbrian CcpDictSetup(proto, bp); 39031514Sbrian 3916059Samurai switch (proto) { 3926059Samurai case PROTO_LCP: 3936059Samurai LcpInput(bp); 3946059Samurai break; 3956059Samurai case PROTO_PAP: 3966059Samurai PapInput(bp); 3976059Samurai break; 3986059Samurai case PROTO_LQR: 3996059Samurai HisLqrSave.SaveInLQRs++; 4006059Samurai LqrInput(bp); 4016059Samurai break; 4026059Samurai case PROTO_CHAP: 4036059Samurai ChapInput(bp); 4046059Samurai break; 4056059Samurai case PROTO_VJUNCOMP: 4066059Samurai case PROTO_VJCOMP: 4076059Samurai bp = VjCompInput(bp, proto); 4086735Samurai if (bp == NULLBUFF) { 4096735Samurai break; 4106735Samurai } 4116059Samurai /* fall down */ 4126059Samurai case PROTO_IP: 4136059Samurai IpInput(bp); 4146059Samurai break; 4156059Samurai case PROTO_IPCP: 4166059Samurai IpcpInput(bp); 4176059Samurai break; 4186059Samurai case PROTO_CCP: 4196059Samurai CcpInput(bp); 4206059Samurai break; 4216059Samurai default: 42231537Sbrian LogPrintf(LogPHASE, "Unknown protocol 0x%04x (%s)\n", 42331537Sbrian proto, Protocol2Nam(proto)); 4249448Samurai bp->offset -= 2; 4259448Samurai bp->cnt += 2; 4269448Samurai cp = MBUF_CTOP(bp); 42728679Sbrian LcpSendProtoRej(cp, bp->cnt); 4286059Samurai HisLqrSave.SaveInDiscards++; 4296059Samurai HdlcStat.unknownproto++; 4306059Samurai pfree(bp); 4316059Samurai break; 4326059Samurai } 4336059Samurai} 4346059Samurai 4356059Samuraiint 43631343SbrianReportProtStatus(struct cmdargs const *arg) 4376059Samurai{ 4386059Samurai struct protostat *statp; 4396059Samurai int cnt; 4406059Samurai 4416059Samurai statp = ProtocolStat; 4426059Samurai statp--; 4436059Samurai cnt = 0; 44426516Sbrian fprintf(VarTerm, " Protocol in out Protocol in out\n"); 4456059Samurai do { 4466059Samurai statp++; 44726516Sbrian fprintf(VarTerm, " %-9s: %8lu, %8lu", 44828679Sbrian statp->name, statp->in_count, statp->out_count); 4496059Samurai if (++cnt == 2) { 45026516Sbrian fprintf(VarTerm, "\n"); 4516059Samurai cnt = 0; 4526059Samurai } 4536059Samurai } while (statp->number); 4546059Samurai if (cnt) 45528679Sbrian fprintf(VarTerm, "\n"); 45628679Sbrian return (1); 4576059Samurai} 4586059Samurai 4596059Samuraiint 46031343SbrianReportHdlcStatus(struct cmdargs const *arg) 4616059Samurai{ 4626059Samurai struct hdlcstat *hp = &HdlcStat; 4636059Samurai 46426516Sbrian if (VarTerm) { 46526516Sbrian fprintf(VarTerm, "HDLC level errors\n\n"); 46626516Sbrian fprintf(VarTerm, "FCS: %u ADDR: %u COMMAND: %u PROTO: %u\n", 46728679Sbrian hp->badfcs, hp->badaddr, hp->badcommand, hp->unknownproto); 46826516Sbrian } 46926516Sbrian return 0; 4706059Samurai} 4716059Samurai 4726059Samuraistatic struct hdlcstat laststat; 4736059Samurai 4746059Samuraivoid 4756059SamuraiHdlcErrorCheck() 4766059Samurai{ 4776059Samurai struct hdlcstat *hp = &HdlcStat; 4786059Samurai struct hdlcstat *op = &laststat; 4796059Samurai 48030715Sbrian if (memcmp(hp, op, sizeof(laststat))) { 48126516Sbrian LogPrintf(LogPHASE, "HDLC errors -> FCS: %u ADDR: %u COMD: %u PROTO: %u\n", 48228679Sbrian hp->badfcs - op->badfcs, hp->badaddr - op->badaddr, 48328679Sbrian hp->badcommand - op->badcommand, hp->unknownproto - op->unknownproto); 4846059Samurai } 4856059Samurai laststat = HdlcStat; 4866059Samurai} 4876059Samurai 4886059Samuraivoid 48928679SbrianHdlcInput(struct mbuf * bp) 4906059Samurai{ 4916059Samurai u_short fcs, proto; 4926059Samurai u_char *cp, addr, ctrl; 4936059Samurai struct protostat *statp; 4946059Samurai 49526516Sbrian LogDumpBp(LogHDLC, "HdlcInput:", bp); 4966735Samurai if (DEV_IS_SYNC) 4976735Samurai fcs = GOODFCS; 4986735Samurai else 4996735Samurai fcs = HdlcFcs(INITFCS, MBUF_CTOP(bp), bp->cnt); 5006059Samurai HisLqrSave.SaveInOctets += bp->cnt + 1; 5016059Samurai 50226516Sbrian LogPrintf(LogDEBUG, "HdlcInput: fcs = %04x (%s)\n", 50328679Sbrian fcs, (fcs == GOODFCS) ? "good" : "bad"); 5046059Samurai if (fcs != GOODFCS) { 5056059Samurai HisLqrSave.SaveInErrors++; 50626516Sbrian LogPrintf(LogDEBUG, "HdlcInput: Bad FCS\n"); 5076059Samurai HdlcStat.badfcs++; 5086059Samurai pfree(bp); 5096059Samurai return; 5106059Samurai } 5116735Samurai if (!DEV_IS_SYNC) 5126735Samurai bp->cnt -= 2; /* discard FCS part */ 51325019Sphk 51425019Sphk if (bp->cnt < 2) { /* XXX: raise this bar ? */ 51528679Sbrian pfree(bp); 51628679Sbrian return; 51725019Sphk } 5186059Samurai cp = MBUF_CTOP(bp); 5196059Samurai 5206059Samurai ifInPackets++; 5216059Samurai ifInOctets += bp->cnt; 5226059Samurai 5236059Samurai if (!LcpInfo.want_acfcomp) { 52428679Sbrian 5256059Samurai /* 52628679Sbrian * We expect that packet is not compressed. 5276059Samurai */ 5286059Samurai addr = *cp++; 5296059Samurai if (addr != HDLC_ADDR) { 5306059Samurai HisLqrSave.SaveInErrors++; 5316059Samurai HdlcStat.badaddr++; 53226516Sbrian LogPrintf(LogDEBUG, "HdlcInput: addr %02x\n", *cp); 5336059Samurai pfree(bp); 5346059Samurai return; 5356059Samurai } 5366059Samurai ctrl = *cp++; 5376059Samurai if (ctrl != HDLC_UI) { 5386059Samurai HisLqrSave.SaveInErrors++; 5396059Samurai HdlcStat.badcommand++; 54026516Sbrian LogPrintf(LogDEBUG, "HdlcInput: %02x\n", *cp); 5416059Samurai pfree(bp); 5426059Samurai return; 5436059Samurai } 5446059Samurai bp->offset += 2; 5456059Samurai bp->cnt -= 2; 5466059Samurai } else if (cp[0] == HDLC_ADDR && cp[1] == HDLC_UI) { 54728679Sbrian 5486059Samurai /* 54928679Sbrian * We can receive compressed packet, but peer still send uncompressed 55028679Sbrian * packet to me. 5516059Samurai */ 5526059Samurai cp += 2; 5536059Samurai bp->offset += 2; 5546059Samurai bp->cnt -= 2; 5556059Samurai } 5566059Samurai if (LcpInfo.want_protocomp) { 5576059Samurai proto = 0; 5586059Samurai cp--; 5596059Samurai do { 56028679Sbrian cp++; 56128679Sbrian bp->offset++; 56228679Sbrian bp->cnt--; 5636059Samurai proto = proto << 8; 5646059Samurai proto += *cp; 5656059Samurai } while (!(proto & 1)); 5666059Samurai } else { 5676059Samurai proto = *cp++ << 8; 5686059Samurai proto |= *cp++; 5696059Samurai bp->offset += 2; 5706059Samurai bp->cnt -= 2; 5716059Samurai } 5726059Samurai 5736059Samurai for (statp = ProtocolStat; statp->number; statp++) 5746059Samurai if (statp->number == proto) 5756059Samurai break; 5766059Samurai statp->in_count++; 5776059Samurai HisLqrSave.SaveInPackets++; 5786059Samurai 5796059Samurai DecodePacket(proto, bp); 5806059Samurai} 581