1161 lines
34 KiB
C
1161 lines
34 KiB
C
/*
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* PPP Link Control Protocol (LCP) Module
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*
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the Internet Initiative Japan, Inc. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: lcp.c,v 1.77 1999/06/09 20:27:26 brian Exp $
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*
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*/
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <sys/un.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "layer.h"
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#include "ua.h"
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#include "defs.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 "iplist.h"
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#include "lcp.h"
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#include "throughput.h"
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#include "proto.h"
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#include "descriptor.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "ccp.h"
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#include "async.h"
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#include "link.h"
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#include "physical.h"
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#include "prompt.h"
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#include "slcompress.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "mp.h"
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#include "chat.h"
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#include "auth.h"
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#include "chap.h"
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#include "cbcp.h"
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#include "datalink.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "bundle.h"
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/* for received LQRs */
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struct lqrreq {
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u_char type;
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u_char length;
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u_short proto; /* Quality protocol */
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u_int32_t period; /* Reporting interval */
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};
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static int LcpLayerUp(struct fsm *);
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static void LcpLayerDown(struct fsm *);
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static void LcpLayerStart(struct fsm *);
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static void LcpLayerFinish(struct fsm *);
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static void LcpInitRestartCounter(struct fsm *, int);
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static void LcpSendConfigReq(struct fsm *);
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static void LcpSentTerminateReq(struct fsm *);
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static void LcpSendTerminateAck(struct fsm *, u_char);
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static void LcpDecodeConfig(struct fsm *, u_char *, int, int,
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struct fsm_decode *);
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static struct fsm_callbacks lcp_Callbacks = {
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LcpLayerUp,
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LcpLayerDown,
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LcpLayerStart,
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LcpLayerFinish,
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LcpInitRestartCounter,
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LcpSendConfigReq,
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LcpSentTerminateReq,
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LcpSendTerminateAck,
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LcpDecodeConfig,
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fsm_NullRecvResetReq,
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fsm_NullRecvResetAck
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};
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static const char *lcp_TimerNames[] =
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{"LCP restart", "LCP openmode", "LCP stopped"};
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static const char *cftypes[] = {
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/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
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"???",
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"MRU", /* 1: Maximum-Receive-Unit */
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"ACCMAP", /* 2: Async-Control-Character-Map */
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"AUTHPROTO", /* 3: Authentication-Protocol */
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"QUALPROTO", /* 4: Quality-Protocol */
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"MAGICNUM", /* 5: Magic-Number */
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"RESERVED", /* 6: RESERVED */
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"PROTOCOMP", /* 7: Protocol-Field-Compression */
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"ACFCOMP", /* 8: Address-and-Control-Field-Compression */
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"FCSALT", /* 9: FCS-Alternatives */
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"SDP", /* 10: Self-Describing-Pad */
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"NUMMODE", /* 11: Numbered-Mode */
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"MULTIPROC", /* 12: Multi-Link-Procedure */
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"CALLBACK", /* 13: Callback */
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"CONTIME", /* 14: Connect-Time */
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"COMPFRAME", /* 15: Compound-Frames */
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"NDE", /* 16: Nominal-Data-Encapsulation */
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"MRRU", /* 17: Multilink-MRRU */
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"SHORTSEQ", /* 18: Multilink-Short-Sequence-Number-Header */
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"ENDDISC", /* 19: Multilink-Endpoint-Discriminator */
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"PROPRIETRY", /* 20: Proprietary */
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"DCEID", /* 21: DCE-Identifier */
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"MULTIPP", /* 22: Multi-Link-Plus-Procedure */
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"LDBACP", /* 23: Link Discriminator for BACP */
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};
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#define NCFTYPES (sizeof cftypes/sizeof cftypes[0])
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int
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lcp_ReportStatus(struct cmdargs const *arg)
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{
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struct link *l;
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struct lcp *lcp;
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l = command_ChooseLink(arg);
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lcp = &l->lcp;
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prompt_Printf(arg->prompt, "%s: %s [%s]\n", l->name, lcp->fsm.name,
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State2Nam(lcp->fsm.state));
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prompt_Printf(arg->prompt,
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" his side: MRU %d, ACCMAP %08lx, PROTOCOMP %s, ACFCOMP %s,\n"
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" MAGIC %08lx, MRRU %u, SHORTSEQ %s, REJECT %04x\n",
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lcp->his_mru, (u_long)lcp->his_accmap,
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lcp->his_protocomp ? "on" : "off",
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lcp->his_acfcomp ? "on" : "off",
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(u_long)lcp->his_magic, lcp->his_mrru,
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lcp->his_shortseq ? "on" : "off", lcp->his_reject);
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prompt_Printf(arg->prompt,
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" my side: MRU %d, ACCMAP %08lx, PROTOCOMP %s, ACFCOMP %s,\n"
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" MAGIC %08lx, MRRU %u, SHORTSEQ %s, REJECT %04x\n",
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lcp->want_mru, (u_long)lcp->want_accmap,
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lcp->want_protocomp ? "on" : "off",
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lcp->want_acfcomp ? "on" : "off",
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(u_long)lcp->want_magic, lcp->want_mrru,
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lcp->want_shortseq ? "on" : "off", lcp->my_reject);
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prompt_Printf(arg->prompt, "\n Defaults: MRU = %d, ", lcp->cfg.mru);
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prompt_Printf(arg->prompt, "ACCMAP = %08lx\n", (u_long)lcp->cfg.accmap);
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prompt_Printf(arg->prompt, " LQR period = %us, ",
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lcp->cfg.lqrperiod);
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prompt_Printf(arg->prompt, "Open Mode = %s",
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lcp->cfg.openmode == OPEN_PASSIVE ? "passive" : "active");
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if (lcp->cfg.openmode > 0)
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prompt_Printf(arg->prompt, " (delay %ds)", lcp->cfg.openmode);
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prompt_Printf(arg->prompt, "\n FSM retry = %us, max %u Config"
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" REQ%s, %u Term REQ%s\n", lcp->cfg.fsm.timeout,
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lcp->cfg.fsm.maxreq, lcp->cfg.fsm.maxreq == 1 ? "" : "s",
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lcp->cfg.fsm.maxtrm, lcp->cfg.fsm.maxtrm == 1 ? "" : "s");
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prompt_Printf(arg->prompt, "\n Negotiation:\n");
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prompt_Printf(arg->prompt, " ACFCOMP = %s\n",
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command_ShowNegval(lcp->cfg.acfcomp));
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prompt_Printf(arg->prompt, " CHAP = %s\n",
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command_ShowNegval(lcp->cfg.chap05));
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#ifdef HAVE_DES
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prompt_Printf(arg->prompt, " MSCHAP = %s\n",
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command_ShowNegval(lcp->cfg.chap80nt));
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prompt_Printf(arg->prompt, " LANMan = %s\n",
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command_ShowNegval(lcp->cfg.chap80lm));
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#endif
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prompt_Printf(arg->prompt, " LQR = %s\n",
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command_ShowNegval(lcp->cfg.lqr));
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prompt_Printf(arg->prompt, " PAP = %s\n",
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command_ShowNegval(lcp->cfg.pap));
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prompt_Printf(arg->prompt, " PROTOCOMP = %s\n",
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command_ShowNegval(lcp->cfg.protocomp));
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return 0;
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}
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static u_int32_t
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GenerateMagic(void)
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{
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/* Generate random number which will be used as magic number */
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randinit();
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return random();
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}
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void
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lcp_SetupCallbacks(struct lcp *lcp)
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{
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lcp->fsm.fn = &lcp_Callbacks;
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lcp->fsm.FsmTimer.name = lcp_TimerNames[0];
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lcp->fsm.OpenTimer.name = lcp_TimerNames[1];
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lcp->fsm.StoppedTimer.name = lcp_TimerNames[2];
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}
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void
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lcp_Init(struct lcp *lcp, struct bundle *bundle, struct link *l,
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const struct fsm_parent *parent)
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{
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/* Initialise ourselves */
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int mincode = parent ? 1 : LCP_MINMPCODE;
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fsm_Init(&lcp->fsm, "LCP", PROTO_LCP, mincode, LCP_MAXCODE, LogLCP,
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bundle, l, parent, &lcp_Callbacks, lcp_TimerNames);
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lcp->cfg.mru = DEF_MRU;
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lcp->cfg.accmap = 0;
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lcp->cfg.openmode = 1;
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lcp->cfg.lqrperiod = DEF_LQRPERIOD;
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lcp->cfg.fsm.timeout = DEF_FSMRETRY;
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lcp->cfg.fsm.maxreq = DEF_FSMTRIES;
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lcp->cfg.fsm.maxtrm = DEF_FSMTRIES;
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lcp->cfg.acfcomp = NEG_ENABLED|NEG_ACCEPTED;
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lcp->cfg.chap05 = NEG_ACCEPTED;
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#ifdef HAVE_DES
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lcp->cfg.chap80nt = NEG_ACCEPTED;
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lcp->cfg.chap80lm = NEG_ACCEPTED;
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#endif
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lcp->cfg.lqr = NEG_ACCEPTED;
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lcp->cfg.pap = NEG_ACCEPTED;
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lcp->cfg.protocomp = NEG_ENABLED|NEG_ACCEPTED;
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lcp_Setup(lcp, lcp->cfg.openmode);
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}
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void
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lcp_Setup(struct lcp *lcp, int openmode)
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{
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lcp->fsm.open_mode = openmode;
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lcp->his_mru = lcp->fsm.bundle->cfg.mtu;
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if (!lcp->his_mru || lcp->his_mru > DEF_MRU)
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lcp->his_mru = DEF_MRU;
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lcp->his_mrru = 0;
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lcp->his_magic = 0;
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lcp->his_lqrperiod = 0;
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lcp->his_acfcomp = 0;
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lcp->his_auth = 0;
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lcp->his_authtype = 0;
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lcp->his_callback.opmask = 0;
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lcp->his_shortseq = 0;
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lcp->want_mru = lcp->cfg.mru;
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lcp->want_mrru = lcp->fsm.bundle->ncp.mp.cfg.mrru;
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lcp->want_shortseq = IsEnabled(lcp->fsm.bundle->ncp.mp.cfg.shortseq) ? 1 : 0;
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lcp->want_acfcomp = IsEnabled(lcp->cfg.acfcomp) ? 1 : 0;
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if (lcp->fsm.parent) {
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struct physical *p = link2physical(lcp->fsm.link);
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lcp->his_accmap = 0xffffffff;
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lcp->want_accmap = lcp->cfg.accmap;
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lcp->his_protocomp = 0;
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lcp->want_protocomp = IsEnabled(lcp->cfg.protocomp) ? 1 : 0;
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lcp->want_magic = GenerateMagic();
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if (IsEnabled(lcp->cfg.chap05)) {
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lcp->want_auth = PROTO_CHAP;
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lcp->want_authtype = 0x05;
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#ifdef HAVE_DES
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} else if (IsEnabled(lcp->cfg.chap80nt) ||
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IsEnabled(lcp->cfg.chap80lm)) {
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lcp->want_auth = PROTO_CHAP;
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lcp->want_authtype = 0x80;
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#endif
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} else if (IsEnabled(lcp->cfg.pap)) {
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lcp->want_auth = PROTO_PAP;
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lcp->want_authtype = 0;
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} else {
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lcp->want_auth = 0;
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lcp->want_authtype = 0;
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}
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if (p->type != PHYS_DIRECT)
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memcpy(&lcp->want_callback, &p->dl->cfg.callback, sizeof(struct callback));
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else
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lcp->want_callback.opmask = 0;
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lcp->want_lqrperiod = IsEnabled(lcp->cfg.lqr) ?
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lcp->cfg.lqrperiod * 100 : 0;
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} else {
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lcp->his_accmap = lcp->want_accmap = 0;
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lcp->his_protocomp = lcp->want_protocomp = 1;
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lcp->want_magic = 0;
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lcp->want_auth = 0;
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lcp->want_authtype = 0;
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lcp->want_callback.opmask = 0;
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lcp->want_lqrperiod = 0;
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}
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lcp->his_reject = lcp->my_reject = 0;
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lcp->auth_iwait = lcp->auth_ineed = 0;
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lcp->LcpFailedMagic = 0;
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}
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static void
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LcpInitRestartCounter(struct fsm *fp, int what)
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{
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/* Set fsm timer load */
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struct lcp *lcp = fsm2lcp(fp);
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fp->FsmTimer.load = lcp->cfg.fsm.timeout * SECTICKS;
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switch (what) {
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case FSM_REQ_TIMER:
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fp->restart = lcp->cfg.fsm.maxreq;
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break;
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case FSM_TRM_TIMER:
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fp->restart = lcp->cfg.fsm.maxtrm;
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break;
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default:
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fp->restart = 1;
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break;
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}
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}
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static void
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LcpSendConfigReq(struct fsm *fp)
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{
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/* Send config REQ please */
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struct physical *p = link2physical(fp->link);
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struct lcp *lcp = fsm2lcp(fp);
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u_char buff[200];
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struct lcp_opt *o;
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struct mp *mp;
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u_int16_t proto;
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if (!p) {
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log_Printf(LogERROR, "%s: LcpSendConfigReq: Not a physical link !\n",
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fp->link->name);
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return;
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}
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o = (struct lcp_opt *)buff;
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if (!physical_IsSync(p)) {
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if (lcp->want_acfcomp && !REJECTED(lcp, TY_ACFCOMP))
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INC_LCP_OPT(TY_ACFCOMP, 2, o);
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if (lcp->want_protocomp && !REJECTED(lcp, TY_PROTOCOMP))
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INC_LCP_OPT(TY_PROTOCOMP, 2, o);
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if (!REJECTED(lcp, TY_ACCMAP)) {
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ua_htonl(&lcp->want_accmap, o->data);
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INC_LCP_OPT(TY_ACCMAP, 6, o);
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}
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}
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if (!REJECTED(lcp, TY_MRU)) {
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ua_htons(&lcp->want_mru, o->data);
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INC_LCP_OPT(TY_MRU, 4, o);
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}
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if (lcp->want_magic && !REJECTED(lcp, TY_MAGICNUM)) {
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ua_htonl(&lcp->want_magic, o->data);
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INC_LCP_OPT(TY_MAGICNUM, 6, o);
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}
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if (lcp->want_lqrperiod && !REJECTED(lcp, TY_QUALPROTO)) {
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proto = PROTO_LQR;
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ua_htons(&proto, o->data);
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ua_htonl(&lcp->want_lqrperiod, o->data + 2);
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INC_LCP_OPT(TY_QUALPROTO, 8, o);
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}
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switch (lcp->want_auth) {
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case PROTO_PAP:
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proto = PROTO_PAP;
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ua_htons(&proto, o->data);
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INC_LCP_OPT(TY_AUTHPROTO, 4, o);
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break;
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case PROTO_CHAP:
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proto = PROTO_CHAP;
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ua_htons(&proto, o->data);
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o->data[2] = lcp->want_authtype;
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INC_LCP_OPT(TY_AUTHPROTO, 5, o);
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break;
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}
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if (!REJECTED(lcp, TY_CALLBACK)) {
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if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
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*o->data = CALLBACK_AUTH;
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INC_LCP_OPT(TY_CALLBACK, 3, o);
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} else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
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*o->data = CALLBACK_CBCP;
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INC_LCP_OPT(TY_CALLBACK, 3, o);
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} else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
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int sz = strlen(lcp->want_callback.msg);
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|
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if (sz > sizeof o->data - 1) {
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sz = sizeof o->data - 1;
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log_Printf(LogWARN, "Truncating E164 data to %d octets (oops!)\n", sz);
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}
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*o->data = CALLBACK_E164;
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memcpy(o->data + 1, lcp->want_callback.msg, sz);
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INC_LCP_OPT(TY_CALLBACK, sz + 3, o);
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}
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}
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if (lcp->want_mrru && !REJECTED(lcp, TY_MRRU)) {
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ua_htons(&lcp->want_mrru, o->data);
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INC_LCP_OPT(TY_MRRU, 4, o);
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if (lcp->want_shortseq && !REJECTED(lcp, TY_SHORTSEQ))
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INC_LCP_OPT(TY_SHORTSEQ, 2, o);
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}
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mp = &lcp->fsm.bundle->ncp.mp;
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if (mp->cfg.enddisc.class != 0 && IsEnabled(mp->cfg.negenddisc) &&
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!REJECTED(lcp, TY_ENDDISC)) {
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*o->data = mp->cfg.enddisc.class;
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memcpy(o->data+1, mp->cfg.enddisc.address, mp->cfg.enddisc.len);
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INC_LCP_OPT(TY_ENDDISC, mp->cfg.enddisc.len + 3, o);
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}
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fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff,
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MB_LCPOUT);
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}
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void
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lcp_SendProtoRej(struct lcp *lcp, u_char *option, int count)
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{
|
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/* Don't understand `option' */
|
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fsm_Output(&lcp->fsm, CODE_PROTOREJ, lcp->fsm.reqid, option, count,
|
|
MB_LCPOUT);
|
|
}
|
|
|
|
static void
|
|
LcpSentTerminateReq(struct fsm *fp)
|
|
{
|
|
/* Term REQ just sent by FSM */
|
|
}
|
|
|
|
static void
|
|
LcpSendTerminateAck(struct fsm *fp, u_char id)
|
|
{
|
|
/* Send Term ACK please */
|
|
struct physical *p = link2physical(fp->link);
|
|
|
|
if (p && p->dl->state == DATALINK_CBCP)
|
|
cbcp_ReceiveTerminateReq(p);
|
|
|
|
fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_LCPOUT);
|
|
}
|
|
|
|
static void
|
|
LcpLayerStart(struct fsm *fp)
|
|
{
|
|
/* We're about to start up ! */
|
|
struct lcp *lcp = fsm2lcp(fp);
|
|
|
|
log_Printf(LogLCP, "%s: LayerStart\n", fp->link->name);
|
|
lcp->LcpFailedMagic = 0;
|
|
fp->more.reqs = fp->more.naks = fp->more.rejs = lcp->cfg.fsm.maxreq * 3;
|
|
}
|
|
|
|
static void
|
|
LcpLayerFinish(struct fsm *fp)
|
|
{
|
|
/* We're now down */
|
|
log_Printf(LogLCP, "%s: LayerFinish\n", fp->link->name);
|
|
}
|
|
|
|
static int
|
|
LcpLayerUp(struct fsm *fp)
|
|
{
|
|
/* We're now up */
|
|
struct physical *p = link2physical(fp->link);
|
|
struct lcp *lcp = fsm2lcp(fp);
|
|
|
|
log_Printf(LogLCP, "%s: LayerUp\n", fp->link->name);
|
|
async_SetLinkParams(&p->async, lcp);
|
|
lqr_Start(lcp);
|
|
hdlc_StartTimer(&p->hdlc);
|
|
fp->more.reqs = fp->more.naks = fp->more.rejs = lcp->cfg.fsm.maxreq * 3;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
LcpLayerDown(struct fsm *fp)
|
|
{
|
|
/* About to come down */
|
|
struct physical *p = link2physical(fp->link);
|
|
|
|
log_Printf(LogLCP, "%s: LayerDown\n", fp->link->name);
|
|
hdlc_StopTimer(&p->hdlc);
|
|
lqr_StopTimer(p);
|
|
lcp_Setup(fsm2lcp(fp), 0);
|
|
}
|
|
|
|
static int
|
|
E164ok(struct callback *cb, char *req, int sz)
|
|
{
|
|
char list[sizeof cb->msg], *next;
|
|
int len;
|
|
|
|
if (!strcmp(cb->msg, "*"))
|
|
return 1;
|
|
|
|
strncpy(list, cb->msg, sizeof list - 1);
|
|
list[sizeof list - 1] = '\0';
|
|
for (next = strtok(list, ","); next; next = strtok(NULL, ",")) {
|
|
len = strlen(next);
|
|
if (sz == len && !memcmp(list, req, sz))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
LcpDecodeConfig(struct fsm *fp, u_char *cp, int plen, int mode_type,
|
|
struct fsm_decode *dec)
|
|
{
|
|
/* Deal with incoming PROTO_LCP */
|
|
struct lcp *lcp = fsm2lcp(fp);
|
|
int type, length, sz, pos, op, callback_req;
|
|
u_int32_t magic, accmap;
|
|
u_short mtu, mru, proto;
|
|
struct lqrreq *req;
|
|
char request[20], desc[22];
|
|
struct mp *mp;
|
|
struct physical *p = link2physical(fp->link);
|
|
|
|
sz = op = callback_req = 0;
|
|
|
|
while (plen >= sizeof(struct fsmconfig)) {
|
|
type = *cp;
|
|
length = cp[1];
|
|
|
|
if (type < 0 || type >= NCFTYPES)
|
|
snprintf(request, sizeof request, " <%d>[%d]", type, length);
|
|
else
|
|
snprintf(request, sizeof request, " %s[%d]", cftypes[type], length);
|
|
|
|
if (length < 2) {
|
|
log_Printf(LogLCP, "%s:%s: Bad LCP length\n", fp->link->name, request);
|
|
break;
|
|
}
|
|
|
|
switch (type) {
|
|
case TY_MRRU:
|
|
mp = &lcp->fsm.bundle->ncp.mp;
|
|
ua_ntohs(cp + 2, &mru);
|
|
log_Printf(LogLCP, "%s %u\n", request, mru);
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (mp->cfg.mrru) {
|
|
if (REJECTED(lcp, TY_MRRU))
|
|
/* Ignore his previous reject so that we REQ next time */
|
|
lcp->his_reject &= ~(1 << type);
|
|
|
|
mtu = lcp->fsm.bundle->cfg.mtu;
|
|
if (mru < MIN_MRU || mru < mtu) {
|
|
/* Push him up to MTU or MIN_MRU */
|
|
lcp->his_mrru = mru < mtu ? mtu : MIN_MRU;
|
|
memcpy(dec->nakend, cp, 2);
|
|
ua_htons(&lcp->his_mrru, dec->nakend + 2);
|
|
dec->nakend += 4;
|
|
} else {
|
|
lcp->his_mrru = mtu ? mtu : mru;
|
|
memcpy(dec->ackend, cp, 4);
|
|
dec->ackend += 4;
|
|
}
|
|
break;
|
|
} else
|
|
goto reqreject;
|
|
break;
|
|
case MODE_NAK:
|
|
if (mp->cfg.mrru) {
|
|
if (REJECTED(lcp, TY_MRRU))
|
|
/* Must have changed his mind ! */
|
|
lcp->his_reject &= ~(1 << type);
|
|
|
|
if (mru > MAX_MRU)
|
|
lcp->want_mrru = MAX_MRU;
|
|
else if (mru < MIN_MRU)
|
|
lcp->want_mrru = MIN_MRU;
|
|
else
|
|
lcp->want_mrru = mru;
|
|
}
|
|
/* else we honour our config and don't send the suggested REQ */
|
|
break;
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
lcp->want_mrru = 0; /* Ah well, no multilink :-( */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_MRU:
|
|
ua_ntohs(cp + 2, &mru);
|
|
log_Printf(LogLCP, "%s %d\n", request, mru);
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
mtu = lcp->fsm.bundle->cfg.mtu;
|
|
if (mru < MIN_MRU || (!lcp->want_mrru && mru < mtu)) {
|
|
/* Push him up to MTU or MIN_MRU */
|
|
lcp->his_mru = mru < mtu ? mtu : MIN_MRU;
|
|
memcpy(dec->nakend, cp, 2);
|
|
ua_htons(&lcp->his_mru, dec->nakend + 2);
|
|
dec->nakend += 4;
|
|
} else {
|
|
lcp->his_mru = mtu ? mtu : mru;
|
|
memcpy(dec->ackend, cp, 4);
|
|
dec->ackend += 4;
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
if (mru > MAX_MRU)
|
|
lcp->want_mru = MAX_MRU;
|
|
else if (mru < MIN_MRU)
|
|
lcp->want_mru = MIN_MRU;
|
|
else
|
|
lcp->want_mru = mru;
|
|
break;
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_ACCMAP:
|
|
ua_ntohl(cp + 2, &accmap);
|
|
log_Printf(LogLCP, "%s 0x%08lx\n", request, (u_long)accmap);
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
lcp->his_accmap = accmap;
|
|
memcpy(dec->ackend, cp, 6);
|
|
dec->ackend += 6;
|
|
break;
|
|
case MODE_NAK:
|
|
lcp->want_accmap = accmap;
|
|
break;
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_AUTHPROTO:
|
|
ua_ntohs(cp + 2, &proto);
|
|
log_Printf(LogLCP, "%s 0x%04x (%s)\n", request, proto,
|
|
Auth2Nam(proto, length > 4 ? cp[4] : 0));
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
switch (proto) {
|
|
case PROTO_PAP:
|
|
if (length != 4) {
|
|
log_Printf(LogLCP, " Bad length!\n");
|
|
goto reqreject;
|
|
}
|
|
if (IsAccepted(lcp->cfg.pap)) {
|
|
lcp->his_auth = proto;
|
|
lcp->his_authtype = 0;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
} else if (IsAccepted(lcp->cfg.chap05)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 5;
|
|
*dec->nakend++ = (unsigned char) (PROTO_CHAP >> 8);
|
|
*dec->nakend++ = (unsigned char) PROTO_CHAP;
|
|
*dec->nakend++ = 0x05;
|
|
#ifdef HAVE_DES
|
|
} else if (IsAccepted(lcp->cfg.chap80nt) ||
|
|
IsAccepted(lcp->cfg.chap80lm)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 5;
|
|
*dec->nakend++ = (unsigned char) (PROTO_CHAP >> 8);
|
|
*dec->nakend++ = (unsigned char) PROTO_CHAP;
|
|
*dec->nakend++ = 0x80;
|
|
#endif
|
|
} else
|
|
goto reqreject;
|
|
break;
|
|
|
|
case PROTO_CHAP:
|
|
if (length != 5) {
|
|
log_Printf(LogLCP, " Bad length!\n");
|
|
goto reqreject;
|
|
}
|
|
if ((cp[4] == 0x05 && IsAccepted(lcp->cfg.chap05))
|
|
#ifdef HAVE_DES
|
|
|| (cp[4] == 0x80 && (IsAccepted(lcp->cfg.chap80nt) ||
|
|
(IsAccepted(lcp->cfg.chap80lm))))
|
|
#endif
|
|
) {
|
|
lcp->his_auth = proto;
|
|
lcp->his_authtype = cp[4];
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
} else {
|
|
#ifndef HAVE_DES
|
|
if (cp[4] == 0x80)
|
|
log_Printf(LogWARN, "CHAP 0x80 not available without DES\n");
|
|
else
|
|
#endif
|
|
if (cp[4] != 0x05)
|
|
log_Printf(LogWARN, "%s not supported\n",
|
|
Auth2Nam(PROTO_CHAP, cp[4]));
|
|
|
|
if (IsAccepted(lcp->cfg.chap05)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 5;
|
|
*dec->nakend++ = (unsigned char) (PROTO_CHAP >> 8);
|
|
*dec->nakend++ = (unsigned char) PROTO_CHAP;
|
|
*dec->nakend++ = 0x05;
|
|
#ifdef HAVE_DES
|
|
} else if (IsAccepted(lcp->cfg.chap80nt) ||
|
|
IsAccepted(lcp->cfg.chap80lm)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 5;
|
|
*dec->nakend++ = (unsigned char) (PROTO_CHAP >> 8);
|
|
*dec->nakend++ = (unsigned char) PROTO_CHAP;
|
|
*dec->nakend++ = 0x80;
|
|
#endif
|
|
} else if (IsAccepted(lcp->cfg.pap)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 4;
|
|
*dec->nakend++ = (unsigned char) (PROTO_PAP >> 8);
|
|
*dec->nakend++ = (unsigned char) PROTO_PAP;
|
|
} else
|
|
goto reqreject;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
log_Printf(LogLCP, "%s 0x%04x - not recognised, NAK\n",
|
|
request, proto);
|
|
memcpy(dec->nakend, cp, length);
|
|
dec->nakend += length;
|
|
break;
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
switch (proto) {
|
|
case PROTO_PAP:
|
|
if (IsEnabled(lcp->cfg.pap)) {
|
|
lcp->want_auth = PROTO_PAP;
|
|
lcp->want_authtype = 0;
|
|
} else {
|
|
log_Printf(LogLCP, "Peer will only send PAP (not enabled)\n");
|
|
lcp->his_reject |= (1 << type);
|
|
}
|
|
break;
|
|
case PROTO_CHAP:
|
|
if (cp[4] == 0x05 && IsEnabled(lcp->cfg.chap05)) {
|
|
lcp->want_auth = PROTO_CHAP;
|
|
lcp->want_authtype = 0x05;
|
|
#ifdef HAVE_DES
|
|
} else if (cp[4] == 0x80 && (IsEnabled(lcp->cfg.chap80nt) ||
|
|
IsEnabled(lcp->cfg.chap80lm))) {
|
|
lcp->want_auth = PROTO_CHAP;
|
|
lcp->want_authtype = 0x80;
|
|
#endif
|
|
} else {
|
|
#ifndef HAVE_DES
|
|
if (cp[4] == 0x80)
|
|
log_Printf(LogLCP, "Peer will only send MSCHAP (not available"
|
|
" without DES)\n");
|
|
else
|
|
#endif
|
|
log_Printf(LogLCP, "Peer will only send %s (not %s)\n",
|
|
Auth2Nam(PROTO_CHAP, cp[4]),
|
|
#ifdef HAVE_DES
|
|
cp[4] == 0x80 ? "configured" :
|
|
#endif
|
|
"supported");
|
|
lcp->his_reject |= (1 << type);
|
|
}
|
|
break;
|
|
default:
|
|
/* We've been NAK'd with something we don't understand :-( */
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_QUALPROTO:
|
|
req = (struct lqrreq *)cp;
|
|
log_Printf(LogLCP, "%s proto %x, interval %lums\n",
|
|
request, ntohs(req->proto), (u_long)ntohl(req->period) * 10);
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (ntohs(req->proto) != PROTO_LQR || !IsAccepted(lcp->cfg.lqr))
|
|
goto reqreject;
|
|
else {
|
|
lcp->his_lqrperiod = ntohl(req->period);
|
|
if (lcp->his_lqrperiod < MIN_LQRPERIOD * 100)
|
|
lcp->his_lqrperiod = MIN_LQRPERIOD * 100;
|
|
req->period = htonl(lcp->his_lqrperiod);
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
break;
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_MAGICNUM:
|
|
ua_ntohl(cp + 2, &magic);
|
|
log_Printf(LogLCP, "%s 0x%08lx\n", request, (u_long)magic);
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (lcp->want_magic) {
|
|
/* Validate magic number */
|
|
if (magic == lcp->want_magic) {
|
|
log_Printf(LogLCP, "Magic is same (%08lx) - %d times\n",
|
|
(u_long)magic, ++lcp->LcpFailedMagic);
|
|
lcp->want_magic = GenerateMagic();
|
|
memcpy(dec->nakend, cp, 6);
|
|
dec->nakend += 6;
|
|
ualarm(TICKUNIT * (4 + 4 * lcp->LcpFailedMagic), 0);
|
|
sigpause(0);
|
|
} else {
|
|
lcp->his_magic = magic;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
lcp->LcpFailedMagic = 0;
|
|
}
|
|
} else {
|
|
goto reqreject;
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
log_Printf(LogLCP, " Magic 0x%08lx is NAKed!\n", (u_long)magic);
|
|
lcp->want_magic = GenerateMagic();
|
|
break;
|
|
case MODE_REJ:
|
|
log_Printf(LogLCP, " Magic 0x%08x is REJected!\n", magic);
|
|
lcp->want_magic = 0;
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_PROTOCOMP:
|
|
log_Printf(LogLCP, "%s\n", request);
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (IsAccepted(lcp->cfg.protocomp)) {
|
|
lcp->his_protocomp = 1;
|
|
memcpy(dec->ackend, cp, 2);
|
|
dec->ackend += 2;
|
|
} else {
|
|
#ifdef OLDMST
|
|
/* MorningStar before v1.3 needs NAK */
|
|
memcpy(dec->nakend, cp, 2);
|
|
dec->nakend += 2;
|
|
#else
|
|
goto reqreject;
|
|
#endif
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
case MODE_REJ:
|
|
lcp->want_protocomp = 0;
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_ACFCOMP:
|
|
log_Printf(LogLCP, "%s\n", request);
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (IsAccepted(lcp->cfg.acfcomp)) {
|
|
lcp->his_acfcomp = 1;
|
|
memcpy(dec->ackend, cp, 2);
|
|
dec->ackend += 2;
|
|
} else {
|
|
#ifdef OLDMST
|
|
/* MorningStar before v1.3 needs NAK */
|
|
memcpy(dec->nakend, cp, 2);
|
|
dec->nakend += 2;
|
|
#else
|
|
goto reqreject;
|
|
#endif
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
case MODE_REJ:
|
|
lcp->want_acfcomp = 0;
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_SDP:
|
|
log_Printf(LogLCP, "%s\n", request);
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
case MODE_NAK:
|
|
case MODE_REJ:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_CALLBACK:
|
|
if (length == 2)
|
|
op = CALLBACK_NONE;
|
|
else
|
|
op = (int)cp[2];
|
|
sz = length - 3;
|
|
switch (op) {
|
|
case CALLBACK_AUTH:
|
|
log_Printf(LogLCP, "%s Auth\n", request);
|
|
break;
|
|
case CALLBACK_DIALSTRING:
|
|
log_Printf(LogLCP, "%s Dialstring %.*s\n", request, sz, cp + 3);
|
|
break;
|
|
case CALLBACK_LOCATION:
|
|
log_Printf(LogLCP, "%s Location %.*s\n", request, sz, cp + 3);
|
|
break;
|
|
case CALLBACK_E164:
|
|
log_Printf(LogLCP, "%s E.164 (%.*s)\n", request, sz, cp + 3);
|
|
break;
|
|
case CALLBACK_NAME:
|
|
log_Printf(LogLCP, "%s Name %.*s\n", request, sz, cp + 3);
|
|
break;
|
|
case CALLBACK_CBCP:
|
|
log_Printf(LogLCP, "%s CBCP\n", request);
|
|
break;
|
|
default:
|
|
log_Printf(LogLCP, "%s ???\n", request);
|
|
break;
|
|
}
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
callback_req = 1;
|
|
if (p->type != PHYS_DIRECT)
|
|
goto reqreject;
|
|
if ((p->dl->cfg.callback.opmask & CALLBACK_BIT(op)) &&
|
|
(op != CALLBACK_AUTH || p->link.lcp.auth_ineed) &&
|
|
(op != CALLBACK_E164 ||
|
|
E164ok(&p->dl->cfg.callback, cp + 3, sz))) {
|
|
lcp->his_callback.opmask = CALLBACK_BIT(op);
|
|
if (sz > sizeof lcp->his_callback.msg - 1) {
|
|
sz = sizeof lcp->his_callback.msg - 1;
|
|
log_Printf(LogWARN, "Truncating option arg to %d octets\n", sz);
|
|
}
|
|
memcpy(lcp->his_callback.msg, cp + 3, sz);
|
|
lcp->his_callback.msg[sz] = '\0';
|
|
memcpy(dec->ackend, cp, sz + 3);
|
|
dec->ackend += sz + 3;
|
|
} else if ((p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) &&
|
|
p->link.lcp.auth_ineed) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 3;
|
|
*dec->nakend++ = CALLBACK_AUTH;
|
|
} else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 3;
|
|
*dec->nakend++ = CALLBACK_CBCP;
|
|
} else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) {
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 3;
|
|
*dec->nakend++ = CALLBACK_E164;
|
|
} else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) {
|
|
log_Printf(LogWARN, "Cannot insist on auth callback without"
|
|
" PAP or CHAP enabled !\n");
|
|
*dec->nakend++ = *cp;
|
|
*dec->nakend++ = 2;
|
|
} else
|
|
goto reqreject;
|
|
break;
|
|
case MODE_NAK:
|
|
/* We don't do what he NAKs with, we do things in our preferred order */
|
|
if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_AUTH))
|
|
lcp->want_callback.opmask &= ~CALLBACK_BIT(CALLBACK_AUTH);
|
|
else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_CBCP))
|
|
lcp->want_callback.opmask &= ~CALLBACK_BIT(CALLBACK_CBCP);
|
|
else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_E164))
|
|
lcp->want_callback.opmask &= ~CALLBACK_BIT(CALLBACK_E164);
|
|
if (lcp->want_callback.opmask == CALLBACK_BIT(CALLBACK_NONE)) {
|
|
log_Printf(LogPHASE, "Peer NAKd all callbacks, trying none\n");
|
|
lcp->want_callback.opmask = 0;
|
|
} else if (!lcp->want_callback.opmask) {
|
|
log_Printf(LogPHASE, "Peer NAKd last configured callback\n");
|
|
fsm_Close(&lcp->fsm);
|
|
}
|
|
break;
|
|
case MODE_REJ:
|
|
if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) {
|
|
lcp->his_reject |= (1 << type);
|
|
lcp->want_callback.opmask = 0;
|
|
} else {
|
|
log_Printf(LogPHASE, "Peer rejected *required* callback\n");
|
|
fsm_Close(&lcp->fsm);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_SHORTSEQ:
|
|
mp = &lcp->fsm.bundle->ncp.mp;
|
|
log_Printf(LogLCP, "%s\n", request);
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (lcp->want_mrru && IsAccepted(mp->cfg.shortseq)) {
|
|
lcp->his_shortseq = 1;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
} else
|
|
goto reqreject;
|
|
break;
|
|
case MODE_NAK:
|
|
/*
|
|
* He's trying to get us to ask for short sequence numbers.
|
|
* We ignore the NAK and honour our configuration file instead.
|
|
*/
|
|
break;
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
lcp->want_shortseq = 0; /* For when we hit MP */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_ENDDISC:
|
|
mp = &lcp->fsm.bundle->ncp.mp;
|
|
log_Printf(LogLCP, "%s %s\n", request,
|
|
mp_Enddisc(cp[2], cp + 3, length - 3));
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (!p) {
|
|
log_Printf(LogLCP, " ENDDISC rejected - not a physical link\n");
|
|
goto reqreject;
|
|
} else if (!IsAccepted(mp->cfg.negenddisc))
|
|
goto reqreject;
|
|
else if (length-3 < sizeof p->dl->peer.enddisc.address &&
|
|
cp[2] <= MAX_ENDDISC_CLASS) {
|
|
p->dl->peer.enddisc.class = cp[2];
|
|
p->dl->peer.enddisc.len = length-3;
|
|
memcpy(p->dl->peer.enddisc.address, cp + 3, length - 3);
|
|
p->dl->peer.enddisc.address[length - 3] = '\0';
|
|
/* XXX: If mp->active, compare and NAK with mp->peer ? */
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
} else {
|
|
if (cp[2] > MAX_ENDDISC_CLASS)
|
|
log_Printf(LogLCP, " ENDDISC rejected - unrecognised class %d\n",
|
|
cp[2]);
|
|
else
|
|
log_Printf(LogLCP, " ENDDISC rejected - local max length is %ld\n",
|
|
(long)(sizeof p->dl->peer.enddisc.address - 1));
|
|
goto reqreject;
|
|
}
|
|
break;
|
|
|
|
case MODE_NAK: /* Treat this as a REJ, we don't vary our disc (yet) */
|
|
case MODE_REJ:
|
|
lcp->his_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
sz = (sizeof desc - 2) / 2;
|
|
if (sz > length - 2)
|
|
sz = length - 2;
|
|
pos = 0;
|
|
desc[0] = sz ? ' ' : '\0';
|
|
for (pos = 0; sz--; pos++)
|
|
sprintf(desc+(pos<<1)+1, "%02x", cp[pos+2]);
|
|
|
|
log_Printf(LogLCP, "%s%s\n", request, desc);
|
|
|
|
if (mode_type == MODE_REQ) {
|
|
reqreject:
|
|
if (length > sizeof dec->rej - (dec->rejend - dec->rej)) {
|
|
length = sizeof dec->rej - (dec->rejend - dec->rej);
|
|
log_Printf(LogLCP, "Can't REJ length %d - trunating to %d\n",
|
|
cp[1], length);
|
|
}
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
lcp->my_reject |= (1 << type);
|
|
if (length != cp[1])
|
|
length = 0; /* force our way out of the loop */
|
|
}
|
|
break;
|
|
}
|
|
plen -= length;
|
|
cp += length;
|
|
}
|
|
|
|
if (mode_type != MODE_NOP) {
|
|
if (mode_type == MODE_REQ && p && p->type == PHYS_DIRECT &&
|
|
p->dl->cfg.callback.opmask && !callback_req &&
|
|
!(p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE))) {
|
|
/* We *REQUIRE* that the peer requests callback */
|
|
*dec->nakend++ = TY_CALLBACK;
|
|
*dec->nakend++ = 3;
|
|
if ((p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) &&
|
|
p->link.lcp.auth_ineed)
|
|
*dec->nakend++ = CALLBACK_AUTH;
|
|
else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP))
|
|
*dec->nakend++ = CALLBACK_CBCP;
|
|
else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164))
|
|
*dec->nakend++ = CALLBACK_E164;
|
|
else {
|
|
log_Printf(LogWARN, "Cannot insist on auth callback without"
|
|
" PAP or CHAP enabled !\n");
|
|
dec->nakend[-1] = 2; /* XXX: Silly ! */
|
|
}
|
|
}
|
|
if (dec->rejend != dec->rej) {
|
|
/* rejects are preferred */
|
|
dec->ackend = dec->ack;
|
|
dec->nakend = dec->nak;
|
|
} else if (dec->nakend != dec->nak)
|
|
/* then NAKs */
|
|
dec->ackend = dec->ack;
|
|
}
|
|
}
|
|
|
|
extern struct mbuf *
|
|
lcp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
|
|
{
|
|
/* Got PROTO_LCP from link */
|
|
mbuf_SetType(bp, MB_LCPIN);
|
|
fsm_Input(&l->lcp.fsm, bp);
|
|
return NULL;
|
|
}
|