hdlc.c revision 32663
156893Sfenner/* 256893Sfenner * PPP High Level Link Control (HDLC) Module 356893Sfenner * 456893Sfenner * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 556893Sfenner * 656893Sfenner * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. 756893Sfenner * 856893Sfenner * Redistribution and use in source and binary forms are permitted 956893Sfenner * provided that the above copyright notice and this paragraph are 1056893Sfenner * duplicated in all such forms and that any documentation, 1156893Sfenner * advertising materials, and other materials related to such 1256893Sfenner * distribution and use acknowledge that the software was developed 1356893Sfenner * by the Internet Initiative Japan, Inc. The name of the 1456893Sfenner * IIJ may not be used to endorse or promote products derived 1556893Sfenner * from this software without specific prior written permission. 1656893Sfenner * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1756893Sfenner * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 1856893Sfenner * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1956893Sfenner * 2056893Sfenner * $Id: hdlc.c,v 1.27 1998/01/10 01:55:10 brian Exp $ 2156893Sfenner * 2256893Sfenner * TODO: 23127668Sbms */ 24214478Srpaulo#include <sys/param.h> 2556893Sfenner#include <netinet/in.h> 2656893Sfenner 2756893Sfenner#include <stdio.h> 2856893Sfenner#include <string.h> 2956893Sfenner#include <termios.h> 3056893Sfenner 3156893Sfenner#include "command.h" 3256893Sfenner#include "mbuf.h" 33127668Sbms#include "log.h" 3456893Sfenner#include "defs.h" 3556893Sfenner#include "timer.h" 3698524Sfenner#include "fsm.h" 3756893Sfenner#include "hdlc.h" 38147899Ssam#include "lcpproto.h" 39147899Ssam#include "ipcp.h" 40147899Ssam#include "ip.h" 41147899Ssam#include "vjcomp.h" 4275115Sfenner#include "pap.h" 4375115Sfenner#include "chap.h" 44127668Sbms#include "lcp.h" 4556893Sfenner#include "async.h" 4675115Sfenner#include "lqr.h" 4775115Sfenner#include "loadalias.h" 4875115Sfenner#include "vars.h" 4998524Sfenner#include "modem.h" 5098524Sfenner#include "ccp.h" 5198524Sfenner 52127668Sbmsstatic struct hdlcstat { 53127668Sbms int badfcs; 54146773Ssam int badaddr; 55146773Ssam int badcommand; 56127668Sbms int unknownproto; 5775115Sfenner} HdlcStat; 58127668Sbms 59127668Sbmsstatic int ifOutPackets; 6056893Sfennerstatic int ifOutOctets; 6175115Sfennerstatic int ifOutLQRs; 6275115Sfenner 6375115Sfennerstatic struct protostat { 6475115Sfenner u_short number; 65214478Srpaulo const char *name; 66214478Srpaulo u_long in_count; 67214478Srpaulo u_long out_count; 68146773Ssam} ProtocolStat[] = { 69146773Ssam { PROTO_IP, "IP" }, 70146773Ssam { PROTO_VJUNCOMP, "VJ_UNCOMP" }, 71146773Ssam { PROTO_VJCOMP, "VJ_COMP" }, 72146773Ssam { PROTO_COMPD, "COMPD" }, 73146773Ssam { PROTO_LCP, "LCP" }, 74146773Ssam { PROTO_IPCP, "IPCP" }, 75147899Ssam { PROTO_CCP, "CCP" }, 76147899Ssam { PROTO_PAP, "PAP" }, 77147899Ssam { PROTO_LQR, "LQR" }, 78147899Ssam { PROTO_CHAP, "CHAP" }, 79146773Ssam { 0, "Others" } 80146773Ssam}; 81162017Ssam 82146773Ssamstatic u_short const fcstab[256] = { 83146773Ssam /* 00 */ 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 84146773Ssam /* 08 */ 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, 85146773Ssam /* 10 */ 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 86147899Ssam /* 18 */ 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, 87146773Ssam /* 20 */ 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 88146773Ssam /* 28 */ 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 89146773Ssam /* 30 */ 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 90146773Ssam /* 38 */ 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 91146773Ssam /* 40 */ 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 92146773Ssam /* 48 */ 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 93146773Ssam /* 50 */ 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, 94146773Ssam /* 58 */ 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 95146773Ssam /* 60 */ 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 96146773Ssam /* 68 */ 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, 97214478Srpaulo /* 70 */ 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 98146773Ssam /* 78 */ 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 99146773Ssam /* 80 */ 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 100146773Ssam /* 88 */ 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 101146773Ssam /* 90 */ 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 102146773Ssam /* 98 */ 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 103146773Ssam /* a0 */ 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, 104146773Ssam /* a8 */ 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 105146773Ssam /* b0 */ 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, 106146773Ssam /* b8 */ 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 107146773Ssam /* c0 */ 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 108146773Ssam /* c8 */ 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 109146773Ssam /* d0 */ 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 110146773Ssam /* d8 */ 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 111146773Ssam /* e0 */ 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 112146773Ssam /* e8 */ 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, 113146773Ssam /* f0 */ 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 114146773Ssam /* f8 */ 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 115146773Ssam}; 116146773Ssam 117146773Ssamu_char EscMap[33]; 118146773Ssam 119146773Ssamvoid 120146773SsamHdlcInit() 121146773Ssam{ 122146773Ssam ifOutOctets = 0; 123146773Ssam ifOutPackets = 0; 124146773Ssam ifOutLQRs = 0; 125146773Ssam} 126146773Ssam 127146773Ssam/* 128146773Ssam * HDLC FCS computation. Read RFC 1171 Appendix B and CCITT X.25 section 129146773Ssam * 2.27 for further details. 130146773Ssam */ 131146773Ssaminline u_short 132146773SsamHdlcFcs(u_short fcs, u_char * cp, int len) 133146773Ssam{ 134146773Ssam while (len--) 135146773Ssam fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff]; 136146773Ssam return (fcs); 137146773Ssam} 138214478Srpaulo 139162017Ssamstatic inline u_short 140146773SsamHdlcFcsBuf(u_short fcs, struct mbuf *m) 141146773Ssam{ 142146773Ssam int len; 143146773Ssam u_char *pos, *end; 144146773Ssam 145146773Ssam len = plength(m); 146146773Ssam pos = MBUF_CTOP(m); 147146773Ssam end = pos + m->cnt; 148146773Ssam while (len--) { 149146773Ssam fcs = (fcs >> 8) ^ fcstab[(fcs ^ *pos++) & 0xff]; 150146773Ssam if (pos == end && len) { 151146773Ssam m = m->next; 152146773Ssam pos = MBUF_CTOP(m); 153146773Ssam end = pos + m->cnt; 154146773Ssam } 155146773Ssam } 15698524Sfenner return (fcs); 15798524Sfenner} 15898524Sfenner 15998524Sfennervoid 16098524SfennerHdlcOutput(int pri, u_short proto, struct mbuf * bp) 16198524Sfenner{ 16298524Sfenner struct mbuf *mhp, *mfcs; 16398524Sfenner struct protostat *statp; 16498524Sfenner struct lqrdata *lqr; 16598524Sfenner u_char *cp; 16698524Sfenner u_short fcs; 16798524Sfenner 16898524Sfenner if ((proto & 0xfff1) == 0x21) /* Network Layer protocol */ 16998524Sfenner if (CcpFsm.state == ST_OPENED) 17098524Sfenner if (CcpOutput(pri, proto, bp)) 17198524Sfenner return; 17298524Sfenner 17398524Sfenner if (DEV_IS_SYNC) 17498524Sfenner mfcs = NULL; 17598524Sfenner else 17698524Sfenner mfcs = mballoc(2, MB_HDLCOUT); 17798524Sfenner 17898524Sfenner mhp = mballoc(4, MB_HDLCOUT); 17998524Sfenner mhp->cnt = 0; 18098524Sfenner cp = MBUF_CTOP(mhp); 18198524Sfenner if (proto == PROTO_LCP || LcpInfo.his_acfcomp == 0) { 18298524Sfenner *cp++ = HDLC_ADDR; 18398524Sfenner *cp++ = HDLC_UI; 18498524Sfenner mhp->cnt += 2; 18598524Sfenner } 18698524Sfenner 18798524Sfenner /* 18898524Sfenner * If possible, compress protocol field. 18998524Sfenner */ 19098524Sfenner if (LcpInfo.his_protocomp && (proto & 0xff00) == 0) { 19198524Sfenner *cp++ = proto; 19298524Sfenner mhp->cnt++; 19398524Sfenner } else { 19498524Sfenner *cp++ = proto >> 8; 19598524Sfenner *cp = proto & 0377; 19698524Sfenner mhp->cnt += 2; 197127668Sbms } 198127668Sbms mhp->next = bp; 199127668Sbms while (bp->next != NULL) 200127668Sbms bp = bp->next; 201127668Sbms bp->next = mfcs; 202127668Sbms bp = mhp->next; 203127668Sbms 204127668Sbms lqr = &MyLqrData; 205127668Sbms lqr->PeerOutPackets = ifOutPackets++; 206127668Sbms ifOutOctets += plength(mhp) + 1; 207127668Sbms lqr->PeerOutOctets = ifOutOctets; 208127668Sbms 209127668Sbms if (proto == PROTO_LQR) { 210127668Sbms lqr->MagicNumber = LcpInfo.want_magic; 211127668Sbms lqr->LastOutLQRs = HisLqrData.PeerOutLQRs; 212127668Sbms lqr->LastOutPackets = HisLqrData.PeerOutPackets; 213127668Sbms lqr->LastOutOctets = HisLqrData.PeerOutOctets; 214127668Sbms lqr->PeerInLQRs = HisLqrSave.SaveInLQRs; 215127668Sbms lqr->PeerInPackets = HisLqrSave.SaveInPackets; 216127668Sbms lqr->PeerInDiscards = HisLqrSave.SaveInDiscards; 217127668Sbms lqr->PeerInErrors = HisLqrSave.SaveInErrors; 218127668Sbms lqr->PeerInOctets = HisLqrSave.SaveInOctets; 219127668Sbms lqr->PeerOutLQRs = ++ifOutLQRs; 220127668Sbms LqrDump("LqrOutput", lqr); 221127668Sbms LqrChangeOrder(lqr, (struct lqrdata *) (MBUF_CTOP(bp))); 222127668Sbms } 223127668Sbms if (!DEV_IS_SYNC) { 224127668Sbms mfcs->cnt = 0; 225127668Sbms fcs = HdlcFcsBuf(INITFCS, mhp); 226127668Sbms fcs = ~fcs; 227127668Sbms cp = MBUF_CTOP(mfcs); 228127668Sbms *cp++ = fcs & 0377; /* Low byte first!! */ 229127668Sbms *cp++ = fcs >> 8; 230127668Sbms mfcs->cnt = 2; 231127668Sbms } 232127668Sbms LogDumpBp(LogHDLC, "HdlcOutput", mhp); 233127668Sbms for (statp = ProtocolStat; statp->number; statp++) 234127668Sbms if (statp->number == proto) 235127668Sbms break; 236127668Sbms statp->out_count++; 237127668Sbms 238127668Sbms LogPrintf(LogDEBUG, "HdlcOutput: proto = 0x%04x\n", proto); 239127668Sbms 240214478Srpaulo if (DEV_IS_SYNC) 241214478Srpaulo ModemOutput(pri, mhp); 242214478Srpaulo else 243214478Srpaulo AsyncOutput(pri, mhp, proto); 244214478Srpaulo} 245214478Srpaulo 246214478Srpaulo/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */ 247214478Srpaulostatic struct { 248214478Srpaulo u_short from; 249214478Srpaulo u_short to; 250214478Srpaulo const char *name; 251214478Srpaulo} protocols[] = { 252214478Srpaulo { 0x0001, 0x0001, "Padding Protocol" }, 253214478Srpaulo { 0x0003, 0x001f, "reserved (transparency inefficient)" }, 254214478Srpaulo { 0x0021, 0x0021, "Internet Protocol" }, 255214478Srpaulo { 0x0023, 0x0023, "OSI Network Layer" }, 256214478Srpaulo { 0x0025, 0x0025, "Xerox NS IDP" }, 257214478Srpaulo { 0x0027, 0x0027, "DECnet Phase IV" }, 258214478Srpaulo { 0x0029, 0x0029, "Appletalk" }, 259214478Srpaulo { 0x002b, 0x002b, "Novell IPX" }, 260214478Srpaulo { 0x002d, 0x002d, "Van Jacobson Compressed TCP/IP" }, 261214478Srpaulo { 0x002f, 0x002f, "Van Jacobson Uncompressed TCP/IP" }, 262214478Srpaulo { 0x0031, 0x0031, "Bridging PDU" }, 263214478Srpaulo { 0x0033, 0x0033, "Stream Protocol (ST-II)" }, 264214478Srpaulo { 0x0035, 0x0035, "Banyan Vines" }, 265214478Srpaulo { 0x0037, 0x0037, "reserved (until 1993)" }, 266214478Srpaulo { 0x0039, 0x0039, "AppleTalk EDDP" }, 267214478Srpaulo { 0x003b, 0x003b, "AppleTalk SmartBuffered" }, 268214478Srpaulo { 0x003d, 0x003d, "Multi-Link" }, 269214478Srpaulo { 0x003f, 0x003f, "NETBIOS Framing" }, 270214478Srpaulo { 0x0041, 0x0041, "Cisco Systems" }, 271214478Srpaulo { 0x0043, 0x0043, "Ascom Timeplex" }, 272214478Srpaulo { 0x0045, 0x0045, "Fujitsu Link Backup and Load Balancing (LBLB)" }, 273214478Srpaulo { 0x0047, 0x0047, "DCA Remote Lan" }, 274214478Srpaulo { 0x0049, 0x0049, "Serial Data Transport Protocol (PPP-SDTP)" }, 275214478Srpaulo { 0x004b, 0x004b, "SNA over 802.2" }, 276214478Srpaulo { 0x004d, 0x004d, "SNA" }, 277214478Srpaulo { 0x004f, 0x004f, "IP6 Header Compression" }, 278214478Srpaulo { 0x0051, 0x0051, "KNX Bridging Data" }, 279214478Srpaulo { 0x0053, 0x0053, "Encryption" }, 280214478Srpaulo { 0x0055, 0x0055, "Individual Link Encryption" }, 281214478Srpaulo { 0x006f, 0x006f, "Stampede Bridging" }, 282214478Srpaulo { 0x0071, 0x0071, "BAP Bandwidth Allocation Protocol" }, 283214478Srpaulo { 0x0073, 0x0073, "MP+ Protocol" }, 284214478Srpaulo { 0x007d, 0x007d, "reserved (Control Escape)" }, 285214478Srpaulo { 0x007f, 0x007f, "reserved (compression inefficient)" }, 286214478Srpaulo { 0x00cf, 0x00cf, "reserved (PPP NLPID)" }, 287214478Srpaulo { 0x00fb, 0x00fb, "compression on single link in multilink group" }, 288214478Srpaulo { 0x00fd, 0x00fd, "1st choice compression" }, 289214478Srpaulo { 0x00ff, 0x00ff, "reserved (compression inefficient)" }, 290214478Srpaulo { 0x0200, 0x02ff, "(compression inefficient)" }, 291214478Srpaulo { 0x0201, 0x0201, "802.1d Hello Packets" }, 292214478Srpaulo { 0x0203, 0x0203, "IBM Source Routing BPDU" }, 293214478Srpaulo { 0x0205, 0x0205, "DEC LANBridge100 Spanning Tree" }, 294214478Srpaulo { 0x0207, 0x0207, "Cisco Discovery Protocol" }, 295214478Srpaulo { 0x0209, 0x0209, "Netcs Twin Routing" }, 296214478Srpaulo { 0x0231, 0x0231, "Luxcom" }, 297214478Srpaulo { 0x0233, 0x0233, "Sigma Network Systems" }, 298214478Srpaulo { 0x0235, 0x0235, "Apple Client Server Protocol" }, 299214478Srpaulo { 0x1e00, 0x1eff, "(compression inefficient)" }, 300214478Srpaulo { 0x4001, 0x4001, "Cray Communications Control Protocol" }, 301214478Srpaulo { 0x4003, 0x4003, "CDPD Mobile Network Registration Protocol" }, 302214478Srpaulo { 0x4021, 0x4021, "Stacker LZS" }, 303214478Srpaulo { 0x8001, 0x801f, "Not Used - reserved" }, 304214478Srpaulo { 0x8021, 0x8021, "Internet Protocol Control Protocol" }, 305214478Srpaulo { 0x8023, 0x8023, "OSI Network Layer Control Protocol" }, 306214478Srpaulo { 0x8025, 0x8025, "Xerox NS IDP Control Protocol" }, 307214478Srpaulo { 0x8027, 0x8027, "DECnet Phase IV Control Protocol" }, 308214478Srpaulo { 0x8029, 0x8029, "Appletalk Control Protocol" }, 309214478Srpaulo { 0x802b, 0x802b, "Novell IPX Control Protocol" }, 310214478Srpaulo { 0x802d, 0x802d, "reserved" }, 311214478Srpaulo { 0x802f, 0x802f, "reserved" }, 312214478Srpaulo { 0x8031, 0x8031, "Bridging NCP" }, 313214478Srpaulo { 0x8033, 0x8033, "Stream Protocol Control Protocol" }, 314214478Srpaulo { 0x8035, 0x8035, "Banyan Vines Control Protocol" }, 315214478Srpaulo { 0x8037, 0x8037, "reserved till 1993" }, 316214478Srpaulo { 0x8039, 0x8039, "reserved" }, 317214478Srpaulo { 0x803b, 0x803b, "reserved" }, 31856893Sfenner { 0x803d, 0x803d, "Multi-Link Control Protocol" }, 319214478Srpaulo { 0x803f, 0x803f, "NETBIOS Framing Control Protocol" }, 320214478Srpaulo { 0x8041, 0x8041, "Cisco Systems Control Protocol" }, 32156893Sfenner { 0x8043, 0x8043, "Ascom Timeplex" }, 32275115Sfenner { 0x8045, 0x8045, "Fujitsu LBLB Control Protocol" }, 32398524Sfenner { 0x8047, 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" }, 32498524Sfenner { 0x8049, 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, 32598524Sfenner { 0x804b, 0x804b, "SNA over 802.2 Control Protocol" }, 32698524Sfenner { 0x804d, 0x804d, "SNA Control Protocol" }, 32798524Sfenner { 0x804f, 0x804f, "IP6 Header Compression Control Protocol" }, 328127668Sbms { 0x8051, 0x8051, "KNX Bridging Control Protocol" }, 32956893Sfenner { 0x8053, 0x8053, "Encryption Control Protocol" }, 33056893Sfenner { 0x8055, 0x8055, "Individual Link Encryption Control Protocol" }, 33156893Sfenner { 0x806f, 0x806f, "Stampede Bridging Control Protocol" }, 33256893Sfenner { 0x8073, 0x8073, "MP+ Control Protocol" }, 33375115Sfenner { 0x8071, 0x8071, "BACP Bandwidth Allocation Control Protocol" }, 33456893Sfenner { 0x807d, 0x807d, "Not Used - reserved" }, 33556893Sfenner { 0x80cf, 0x80cf, "Not Used - reserved" }, 336127668Sbms { 0x80fb, 0x80fb, "compression on single link in multilink group control" }, 337127668Sbms { 0x80fd, 0x80fd, "Compression Control Protocol" }, 338127668Sbms { 0x80ff, 0x80ff, "Not Used - reserved" }, 339127668Sbms { 0x8207, 0x8207, "Cisco Discovery Protocol Control" }, 340127668Sbms { 0x8209, 0x8209, "Netcs Twin Routing" }, 341127668Sbms { 0x8235, 0x8235, "Apple Client Server Protocol Control" }, 342127668Sbms { 0xc021, 0xc021, "Link Control Protocol" }, 343127668Sbms { 0xc023, 0xc023, "Password Authentication Protocol" }, 344127668Sbms { 0xc025, 0xc025, "Link Quality Report" }, 345127668Sbms { 0xc027, 0xc027, "Shiva Password Authentication Protocol" }, 346127668Sbms { 0xc029, 0xc029, "CallBack Control Protocol (CBCP)" }, 347127668Sbms { 0xc081, 0xc081, "Container Control Protocol" }, 348127668Sbms { 0xc223, 0xc223, "Challenge Handshake Authentication Protocol" }, 349127668Sbms { 0xc225, 0xc225, "RSA Authentication Protocol" }, 350146773Ssam { 0xc227, 0xc227, "Extensible Authentication Protocol" }, 351146773Ssam { 0xc26f, 0xc26f, "Stampede Bridging Authorization Protocol" }, 352146773Ssam { 0xc281, 0xc281, "Proprietary Authentication Protocol" }, 353146773Ssam { 0xc283, 0xc283, "Proprietary Authentication Protocol" }, 354146773Ssam { 0xc481, 0xc481, "Proprietary Node ID Authentication Protocol" } 355146773Ssam}; 356146773Ssam 357146773Ssam#define NPROTOCOLS (sizeof protocols/sizeof protocols[0]) 358146773Ssam 359146773Ssamstatic const char * 360146773SsamProtocol2Nam(u_short proto) 361146773Ssam{ 362146773Ssam int f; 36375115Sfenner 36456893Sfenner for (f = 0; f < NPROTOCOLS; f++) 36556893Sfenner if (proto >= protocols[f].from && proto <= protocols[f].to) 366146773Ssam return protocols[f].name; 36756893Sfenner else if (proto < protocols[f].from) 368146773Ssam break; 369146773Ssam return "unrecognised protocol"; 37056893Sfenner} 371146773Ssam 372146773Ssamstatic void 373146773SsamDecodePacket(u_short proto, struct mbuf * bp) 37456893Sfenner{ 375146773Ssam u_char *cp; 37656893Sfenner 37756893Sfenner LogPrintf(LogDEBUG, "DecodePacket: proto = 0x%04x\n", proto); 37856893Sfenner 37956893Sfenner /* 38075115Sfenner * If proto isn't PROTO_COMPD, we still want to pass it to the 38175115Sfenner * decompression routines so that the dictionary's updated 38275115Sfenner */ 38375115Sfenner if (CcpFsm.state == ST_OPENED) 384127668Sbms if (proto == PROTO_COMPD) { 38575115Sfenner if ((bp = CompdInput(&proto, bp)) == NULL) 38656893Sfenner return; 387146773Ssam } else if ((proto & 0xfff1) == 0x21) /* Network Layer protocol */ 38856893Sfenner CcpDictSetup(proto, bp); 38956893Sfenner 39056893Sfenner switch (proto) { 39156893Sfenner case PROTO_LCP: 392146773Ssam LcpInput(bp); 39356893Sfenner break; 39456893Sfenner case PROTO_PAP: 39556893Sfenner PapInput(bp); 39656893Sfenner break; 397146773Ssam case PROTO_LQR: 39856893Sfenner HisLqrSave.SaveInLQRs++; 39956893Sfenner LqrInput(bp); 40056893Sfenner break; 40156893Sfenner case PROTO_CHAP: 40256893Sfenner ChapInput(bp); 40356893Sfenner break; 404146773Ssam case PROTO_VJUNCOMP: 405146773Ssam case PROTO_VJCOMP: 406146773Ssam bp = VjCompInput(bp, proto); 407146773Ssam if (bp == NULL) { 408146773Ssam break; 40956893Sfenner } 41056893Sfenner /* fall down */ 41156893Sfenner case PROTO_IP: 41256893Sfenner IpInput(bp); 413146773Ssam break; 41456893Sfenner case PROTO_IPCP: 41556893Sfenner IpcpInput(bp); 41656893Sfenner break; 41756893Sfenner case PROTO_CCP: 41856893Sfenner CcpInput(bp); 419146773Ssam break; 42056893Sfenner default: 42156893Sfenner LogPrintf(LogPHASE, "Unknown protocol 0x%04x (%s)\n", 42256893Sfenner proto, Protocol2Nam(proto)); 423146773Ssam bp->offset -= 2; 42456893Sfenner bp->cnt += 2; 42556893Sfenner cp = MBUF_CTOP(bp); 426146773Ssam LcpSendProtoRej(cp, bp->cnt); 42756893Sfenner HisLqrSave.SaveInDiscards++; 42856893Sfenner HdlcStat.unknownproto++; 42956893Sfenner pfree(bp); 43056893Sfenner break; 43156893Sfenner } 43256893Sfenner} 43356893Sfenner 434146773Ssamint 43556893SfennerReportProtStatus(struct cmdargs const *arg) 43656893Sfenner{ 437146773Ssam struct protostat *statp; 43856893Sfenner int cnt; 43956893Sfenner 440146773Ssam statp = ProtocolStat; 44156893Sfenner statp--; 44256893Sfenner cnt = 0; 443146773Ssam fprintf(VarTerm, " Protocol in out Protocol in out\n"); 44456893Sfenner do { 44556893Sfenner statp++; 44656893Sfenner fprintf(VarTerm, " %-9s: %8lu, %8lu", 44756893Sfenner statp->name, statp->in_count, statp->out_count); 44856893Sfenner if (++cnt == 2) { 44956893Sfenner fprintf(VarTerm, "\n"); 450127668Sbms cnt = 0; 451146773Ssam } 45256893Sfenner } while (statp->number); 45356893Sfenner if (cnt) 454146773Ssam fprintf(VarTerm, "\n"); 455146773Ssam return (0); 456146773Ssam} 457146773Ssam 458146773Ssamint 459146773SsamReportHdlcStatus(struct cmdargs const *arg) 460146773Ssam{ 461146773Ssam struct hdlcstat *hp = &HdlcStat; 46256893Sfenner 46356893Sfenner if (VarTerm) { 46456893Sfenner fprintf(VarTerm, "HDLC level errors\n\n"); 46556893Sfenner fprintf(VarTerm, "FCS: %u ADDR: %u COMMAND: %u PROTO: %u\n", 46656893Sfenner hp->badfcs, hp->badaddr, hp->badcommand, hp->unknownproto); 46756893Sfenner } 46856893Sfenner return 0; 46956893Sfenner} 470146773Ssam 47156893Sfennerstatic struct hdlcstat laststat; 47275115Sfenner 473127668Sbmsvoid 47456893SfennerHdlcErrorCheck() 47556893Sfenner{ 47656893Sfenner struct hdlcstat *hp = &HdlcStat; 477146773Ssam struct hdlcstat *op = &laststat; 47856893Sfenner 47956893Sfenner if (memcmp(hp, op, sizeof laststat)) { 48056893Sfenner LogPrintf(LogPHASE, "HDLC errors -> FCS: %u ADDR: %u COMD: %u PROTO: %u\n", 48156893Sfenner hp->badfcs - op->badfcs, hp->badaddr - op->badaddr, 48256893Sfenner hp->badcommand - op->badcommand, hp->unknownproto - op->unknownproto); 483146773Ssam } 484146773Ssam laststat = HdlcStat; 485146773Ssam} 486146773Ssam 487146773Ssamvoid 488146773SsamHdlcInput(struct mbuf * bp) 489146773Ssam{ 490146773Ssam u_short fcs, proto; 49198524Sfenner u_char *cp, addr, ctrl; 49275115Sfenner struct protostat *statp; 493127668Sbms 49456893Sfenner LogDumpBp(LogHDLC, "HdlcInput:", bp); 49556893Sfenner if (DEV_IS_SYNC) 49656893Sfenner fcs = GOODFCS; 49756893Sfenner else 49856893Sfenner fcs = HdlcFcs(INITFCS, MBUF_CTOP(bp), bp->cnt); 49956893Sfenner HisLqrSave.SaveInOctets += bp->cnt + 1; 50056893Sfenner 501146773Ssam LogPrintf(LogDEBUG, "HdlcInput: fcs = %04x (%s)\n", 50256893Sfenner fcs, (fcs == GOODFCS) ? "good" : "bad"); 50356893Sfenner if (fcs != GOODFCS) { 50475115Sfenner HisLqrSave.SaveInErrors++; 505127668Sbms LogPrintf(LogDEBUG, "HdlcInput: Bad FCS\n"); 50656893Sfenner HdlcStat.badfcs++; 50756893Sfenner pfree(bp); 50856893Sfenner return; 50956893Sfenner } 51056893Sfenner if (!DEV_IS_SYNC) 51156893Sfenner bp->cnt -= 2; /* discard FCS part */ 51256893Sfenner 51356893Sfenner if (bp->cnt < 2) { /* XXX: raise this bar ? */ 51456893Sfenner pfree(bp); 515146773Ssam return; 51656893Sfenner } 51775115Sfenner cp = MBUF_CTOP(bp); 518146773Ssam 519146773Ssam if (!LcpInfo.want_acfcomp) { 520146773Ssam 521146773Ssam /* 52256893Sfenner * We expect that packet is not compressed. 52375115Sfenner */ 524127668Sbms addr = *cp++; 52575115Sfenner if (addr != HDLC_ADDR) { 52656893Sfenner HisLqrSave.SaveInErrors++; 52756893Sfenner HdlcStat.badaddr++; 52856893Sfenner LogPrintf(LogDEBUG, "HdlcInput: addr %02x\n", *cp); 52956893Sfenner pfree(bp); 53056893Sfenner return; 53156893Sfenner } 532146773Ssam ctrl = *cp++; 533127668Sbms if (ctrl != HDLC_UI) { 53475115Sfenner HisLqrSave.SaveInErrors++; 53575115Sfenner HdlcStat.badcommand++; 53656893Sfenner LogPrintf(LogDEBUG, "HdlcInput: %02x\n", *cp); 53756893Sfenner pfree(bp); 53856893Sfenner return; 539127668Sbms } 54056893Sfenner bp->offset += 2; 54156893Sfenner bp->cnt -= 2; 54275115Sfenner } else if (cp[0] == HDLC_ADDR && cp[1] == HDLC_UI) { 54375115Sfenner 54456893Sfenner /* 545127668Sbms * We can receive compressed packet, but peer still send uncompressed 54656893Sfenner * packet to me. 54775115Sfenner */ 54875115Sfenner cp += 2; 549127668Sbms bp->offset += 2; 55056893Sfenner bp->cnt -= 2; 551146773Ssam } 552146773Ssam if (LcpInfo.want_protocomp) { 553146773Ssam proto = 0; 554146773Ssam cp--; 555146773Ssam do { 556146773Ssam cp++; 557146773Ssam bp->offset++; 558127668Sbms bp->cnt--; 559146773Ssam proto = proto << 8; 560146773Ssam proto += *cp; 561146773Ssam } while (!(proto & 1)); 562127668Sbms } else { 563127668Sbms proto = *cp++ << 8; 564127668Sbms proto |= *cp++; 565127668Sbms bp->offset += 2; 566127668Sbms bp->cnt -= 2; 567127668Sbms } 568146773Ssam 569127668Sbms for (statp = ProtocolStat; statp->number; statp++) 570127668Sbms if (statp->number == proto) 571127668Sbms break; 572127668Sbms statp->in_count++; 573127668Sbms HisLqrSave.SaveInPackets++; 574127668Sbms 575127668Sbms DecodePacket(proto, bp); 576127668Sbms} 577127668Sbms