1342caed9c
bundle (non-negotiated vars) or to their respective IPCP, LCP or CCP. o Enable rolling throughput statistics by default. o Remove the `display' command. These values now appear in `show bundle', `show ipcp', `show ccp' and `show lcp'. o Initialise auth name & key at bundle create time (oops). o Rename pppd-deflate (the id-24 hack) to deflate24. o Don't send both a REJ and a NAK to an IPCP or LCP REQ. Favour the REJ (already done at the CCP level). o Recurse in datalink_UpdateSet() when we change state, otherwise we end up setting no descriptors and getting jammed in the imminent select() instead of doing the dial/login/hangup. o Display our CHAP encryption method despite being built with DES. o Display VJ as not negotiated in ``show ipcp'' when necessary.
543 lines
15 KiB
C
543 lines
15 KiB
C
/*
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* PPP Compression Control Protocol (CCP) 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) 1994, 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: ccp.c,v 1.30.2.33 1998/04/07 00:53:22 brian Exp $
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*
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* TODO:
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* o Support other compression protocols
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*/
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#include <sys/types.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 <stdio.h>
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#include <stdlib.h>
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#include <termios.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 "defs.h"
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#include "timer.h"
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#include "fsm.h"
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#include "lcpproto.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "pred.h"
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#include "deflate.h"
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#include "throughput.h"
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#include "iplist.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 "descriptor.h"
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#include "prompt.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "link.h"
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#include "mp.h"
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#include "bundle.h"
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static void CcpSendConfigReq(struct fsm *);
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static void CcpSentTerminateReq(struct fsm *);
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static void CcpSendTerminateAck(struct fsm *, u_char);
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static void CcpDecodeConfig(struct fsm *, u_char *, int, int,
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struct fsm_decode *);
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static void CcpLayerStart(struct fsm *);
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static void CcpLayerFinish(struct fsm *);
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static void CcpLayerUp(struct fsm *);
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static void CcpLayerDown(struct fsm *);
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static void CcpInitRestartCounter(struct fsm *);
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static void CcpRecvResetReq(struct fsm *);
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static void CcpRecvResetAck(struct fsm *, u_char);
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static struct fsm_callbacks ccp_Callbacks = {
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CcpLayerUp,
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CcpLayerDown,
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CcpLayerStart,
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CcpLayerFinish,
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CcpInitRestartCounter,
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CcpSendConfigReq,
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CcpSentTerminateReq,
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CcpSendTerminateAck,
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CcpDecodeConfig,
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CcpRecvResetReq,
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CcpRecvResetAck
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};
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static char const *cftypes[] = {
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/* Check out the latest ``Compression Control Protocol'' rfc (rfc1962.txt) */
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"OUI", /* 0: OUI */
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"PRED1", /* 1: Predictor type 1 */
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"PRED2", /* 2: Predictor type 2 */
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"PUDDLE", /* 3: Puddle Jumber */
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"???", "???", "???", "???", "???", "???",
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"???", "???", "???", "???", "???", "???",
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"HWPPC", /* 16: Hewlett-Packard PPC */
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"STAC", /* 17: Stac Electronics LZS (rfc1974) */
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"MPPC", /* 18: Microsoft PPC (rfc2118) */
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"GAND", /* 19: Gandalf FZA (rfc1993) */
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"V42BIS", /* 20: ARG->DATA.42bis compression */
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"BSD", /* 21: BSD LZW Compress */
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"???",
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"LZS-DCP", /* 23: LZS-DCP Compression Protocol (rfc1967) */
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"MAGNALINK/DEFLATE", /* 24: Magnalink Variable Resource (rfc1975) */
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/* 24: Deflate (according to pppd-2.3.*) */
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"DCE", /* 25: Data Circuit-Terminating Equip (rfc1976) */
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"DEFLATE", /* 26: Deflate (rfc1979) */
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};
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#define NCFTYPES (sizeof cftypes/sizeof cftypes[0])
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static const char *
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protoname(int proto)
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{
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if (proto < 0 || proto > NCFTYPES)
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return "none";
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return cftypes[proto];
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}
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/* We support these algorithms, and Req them in the given order */
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static const struct ccp_algorithm *algorithm[] = {
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&DeflateAlgorithm,
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&Pred1Algorithm,
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&PppdDeflateAlgorithm
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};
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#define NALGORITHMS (sizeof algorithm/sizeof algorithm[0])
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int
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ccp_ReportStatus(struct cmdargs const *arg)
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{
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struct link *l = ChooseLink(arg);
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struct ccp *ccp = &l->ccp;
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prompt_Printf(arg->prompt, "%s: %s [%s]\n", l->name, ccp->fsm.name,
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State2Nam(ccp->fsm.state));
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prompt_Printf(arg->prompt, " My protocol = %s, His protocol = %s\n",
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protoname(ccp->my_proto), protoname(ccp->his_proto));
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prompt_Printf(arg->prompt, " Output: %ld --> %ld, Input: %ld --> %ld\n",
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ccp->uncompout, ccp->compout,
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ccp->compin, ccp->uncompin);
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prompt_Printf(arg->prompt, "\n Defaults: ");
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prompt_Printf(arg->prompt, "FSM retry = %us\n", ccp->cfg.fsmretry);
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prompt_Printf(arg->prompt, " deflate windows: ");
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prompt_Printf(arg->prompt, "incoming = %d, ", ccp->cfg.deflate.in.winsize);
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prompt_Printf(arg->prompt, "outgoing = %d\n", ccp->cfg.deflate.out.winsize);
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prompt_Printf(arg->prompt, " DEFLATE: %s\n",
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command_ShowNegval(ccp->cfg.neg[CCP_NEG_DEFLATE]));
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prompt_Printf(arg->prompt, " PREDICTOR1: %s\n",
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command_ShowNegval(ccp->cfg.neg[CCP_NEG_PRED1]));
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prompt_Printf(arg->prompt, " DEFLATE24: %s\n",
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command_ShowNegval(ccp->cfg.neg[CCP_NEG_DEFLATE24]));
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return 0;
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}
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void
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ccp_Init(struct ccp *ccp, 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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static const char *timer_names[] =
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{"CCP restart", "CCP openmode", "CCP stopped"};
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fsm_Init(&ccp->fsm, "CCP", PROTO_CCP, 1, CCP_MAXCODE, 10, LogCCP,
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bundle, l, parent, &ccp_Callbacks, timer_names);
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ccp->cfg.deflate.in.winsize = 0;
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ccp->cfg.deflate.out.winsize = 15;
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ccp->cfg.fsmretry = DEF_FSMRETRY;
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ccp->cfg.neg[CCP_NEG_DEFLATE] = NEG_ENABLED|NEG_ACCEPTED;
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ccp->cfg.neg[CCP_NEG_PRED1] = NEG_ENABLED|NEG_ACCEPTED;
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ccp->cfg.neg[CCP_NEG_DEFLATE24] = 0;
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ccp_Setup(ccp);
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}
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void
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ccp_Setup(struct ccp *ccp)
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{
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/* Set ourselves up for a startup */
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ccp->fsm.open_mode = 0;
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ccp->fsm.maxconfig = 10;
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ccp->his_proto = ccp->my_proto = -1;
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ccp->reset_sent = ccp->last_reset = -1;
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ccp->in.algorithm = ccp->out.algorithm = -1;
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ccp->in.state = ccp->out.state = NULL;
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ccp->in.opt.id = -1;
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ccp->out.opt = NULL;
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ccp->his_reject = ccp->my_reject = 0;
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ccp->uncompout = ccp->compout = 0;
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ccp->uncompin = ccp->compin = 0;
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}
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static void
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CcpInitRestartCounter(struct fsm *fp)
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{
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/* Set fsm timer load */
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struct ccp *ccp = fsm2ccp(fp);
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fp->FsmTimer.load = ccp->cfg.fsmretry * SECTICKS;
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fp->restart = 5;
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}
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static void
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CcpSendConfigReq(struct fsm *fp)
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{
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/* Send config REQ please */
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struct ccp *ccp = fsm2ccp(fp);
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struct ccp_opt **o;
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u_char *cp, buff[100];
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int f, alloc;
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cp = buff;
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o = &ccp->out.opt;
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alloc = ccp->his_reject == 0 && ccp->out.opt == NULL;
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ccp->my_proto = -1;
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ccp->out.algorithm = -1;
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for (f = 0; f < NALGORITHMS; f++)
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if (IsEnabled(ccp->cfg.neg[algorithm[f]->Neg]) &&
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!REJECTED(ccp, algorithm[f]->id)) {
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if (alloc) {
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*o = (struct ccp_opt *)malloc(sizeof(struct ccp_opt));
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(*o)->val.id = algorithm[f]->id;
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(*o)->val.len = 2;
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(*o)->next = NULL;
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(*o)->algorithm = f;
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(*algorithm[f]->o.OptInit)(&(*o)->val, &ccp->cfg);
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} else {
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for (o = &ccp->out.opt; *o != NULL; o = &(*o)->next)
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if ((*o)->val.id == algorithm[f]->id && (*o)->algorithm == f)
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break;
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if (*o == NULL) {
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LogPrintf(LogERROR, "CCP REQ buffer lost !\n");
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break;
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}
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}
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if (cp + (*o)->val.len > buff + sizeof buff) {
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LogPrintf(LogERROR, "CCP REQ buffer overrun !\n");
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break;
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}
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memcpy(cp, &(*o)->val, (*o)->val.len);
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cp += (*o)->val.len;
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ccp->my_proto = (*o)->val.id;
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ccp->out.algorithm = f;
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if (alloc)
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o = &(*o)->next;
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}
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FsmOutput(fp, CODE_CONFIGREQ, fp->reqid, buff, cp - buff);
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}
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void
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CcpSendResetReq(struct fsm *fp)
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{
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/* We can't read our input - ask peer to reset */
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struct ccp *ccp = fsm2ccp(fp);
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ccp->reset_sent = fp->reqid;
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ccp->last_reset = -1;
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FsmOutput(fp, CODE_RESETREQ, fp->reqid, NULL, 0);
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}
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static void
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CcpSentTerminateReq(struct fsm *fp)
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{
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/* Term REQ just sent by FSM */
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}
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static void
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CcpSendTerminateAck(struct fsm *fp, u_char id)
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{
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/* Send Term ACK please */
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FsmOutput(fp, CODE_TERMACK, id, NULL, 0);
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}
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static void
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CcpRecvResetReq(struct fsm *fp)
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{
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/* Got a reset REQ, reset outgoing dictionary */
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struct ccp *ccp = fsm2ccp(fp);
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if (ccp->out.state != NULL)
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(*algorithm[ccp->out.algorithm]->o.Reset)(ccp->out.state);
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}
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static void
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CcpLayerStart(struct fsm *fp)
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{
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/* We're about to start up ! */
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LogPrintf(LogCCP, "CcpLayerStart.\n");
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}
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static void
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CcpLayerFinish(struct fsm *fp)
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{
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/* We're now down */
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struct ccp *ccp = fsm2ccp(fp);
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LogPrintf(LogCCP, "CcpLayerFinish.\n");
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if (ccp->in.state != NULL) {
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(*algorithm[ccp->in.algorithm]->i.Term)(ccp->in.state);
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ccp->in.state = NULL;
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}
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if (ccp->out.state != NULL) {
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(*algorithm[ccp->out.algorithm]->o.Term)(ccp->out.state);
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ccp->out.state = NULL;
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}
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}
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static void
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CcpLayerDown(struct fsm *fp)
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{
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/* About to come down */
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LogPrintf(LogCCP, "CcpLayerDown.\n");
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}
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/*
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* Called when CCP has reached the OPEN state
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*/
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static void
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CcpLayerUp(struct fsm *fp)
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{
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/* We're now up */
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struct ccp *ccp = fsm2ccp(fp);
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LogPrintf(LogCCP, "CcpLayerUp.\n");
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if (ccp->in.state == NULL && ccp->in.algorithm >= 0 &&
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ccp->in.algorithm < NALGORITHMS) {
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ccp->in.state = (*algorithm[ccp->in.algorithm]->i.Init)(&ccp->in.opt);
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if (ccp->in.state == NULL) {
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LogPrintf(LogERROR, "%s (in) initialisation failure\n",
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protoname(ccp->his_proto));
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ccp->his_proto = ccp->my_proto = -1;
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FsmClose(fp);
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}
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}
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if (ccp->out.state == NULL && ccp->out.algorithm >= 0 &&
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ccp->out.algorithm < NALGORITHMS) {
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ccp->out.state = (*algorithm[ccp->out.algorithm]->o.Init)
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(&ccp->out.opt->val);
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if (ccp->out.state == NULL) {
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LogPrintf(LogERROR, "%s (out) initialisation failure\n",
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protoname(ccp->my_proto));
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ccp->his_proto = ccp->my_proto = -1;
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FsmClose(fp);
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}
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}
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LogPrintf(LogCCP, "Out = %s[%d], In = %s[%d]\n",
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protoname(ccp->my_proto), ccp->my_proto,
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protoname(ccp->his_proto), ccp->his_proto);
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}
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static void
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CcpDecodeConfig(struct fsm *fp, u_char *cp, int plen, int mode_type,
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struct fsm_decode *dec)
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{
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/* Deal with incoming data */
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struct ccp *ccp = fsm2ccp(fp);
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int type, length;
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int f;
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const char *end;
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while (plen >= sizeof(struct fsmconfig)) {
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type = *cp;
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length = cp[1];
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if (length > sizeof(struct lcp_opt)) {
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length = sizeof(struct lcp_opt);
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LogPrintf(LogCCP, "Warning: Truncating length to %d\n", length);
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}
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for (f = NALGORITHMS-1; f > -1; f--)
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if (algorithm[f]->id == type)
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break;
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end = f == -1 ? "" : (*algorithm[f]->Disp)((struct lcp_opt *)cp);
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if (end == NULL)
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end = "";
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if (type < NCFTYPES)
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LogPrintf(LogCCP, " %s[%d] %s\n", cftypes[type], length, end);
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else
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LogPrintf(LogCCP, " ???[%d] %s\n", length, end);
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if (f == -1) {
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/* Don't understand that :-( */
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if (mode_type == MODE_REQ) {
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ccp->my_reject |= (1 << type);
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memcpy(dec->rejend, cp, length);
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dec->rejend += length;
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}
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} else {
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struct ccp_opt *o;
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switch (mode_type) {
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case MODE_REQ:
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if (IsAccepted(ccp->cfg.neg[algorithm[f]->Neg]) &&
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ccp->in.algorithm == -1) {
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memcpy(&ccp->in.opt, cp, length);
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switch ((*algorithm[f]->i.Set)(&ccp->in.opt, &ccp->cfg)) {
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case MODE_REJ:
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memcpy(dec->rejend, &ccp->in.opt, ccp->in.opt.len);
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dec->rejend += ccp->in.opt.len;
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break;
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case MODE_NAK:
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memcpy(dec->nakend, &ccp->in.opt, ccp->in.opt.len);
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dec->nakend += ccp->in.opt.len;
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break;
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case MODE_ACK:
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memcpy(dec->ackend, cp, length);
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dec->ackend += length;
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ccp->his_proto = type;
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ccp->in.algorithm = f; /* This one'll do :-) */
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break;
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}
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} else {
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memcpy(dec->rejend, cp, length);
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dec->rejend += length;
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}
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break;
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case MODE_NAK:
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for (o = ccp->out.opt; o != NULL; o = o->next)
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if (o->val.id == cp[0])
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break;
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if (o == NULL)
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LogPrintf(LogCCP, "Warning: Ignoring peer NAK of unsent option\n");
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else {
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memcpy(&o->val, cp, length);
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if ((*algorithm[f]->o.Set)(&o->val) == MODE_ACK)
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ccp->my_proto = algorithm[f]->id;
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else {
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ccp->his_reject |= (1 << type);
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ccp->my_proto = -1;
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}
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}
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break;
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case MODE_REJ:
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ccp->his_reject |= (1 << type);
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ccp->my_proto = -1;
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break;
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}
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}
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plen -= cp[1];
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cp += cp[1];
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}
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if (mode_type != MODE_NOP)
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if (dec->rejend != dec->rej) {
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/* rejects are preferred */
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dec->ackend = dec->ack;
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dec->nakend = dec->nak;
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if (ccp->in.state == NULL) {
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ccp->his_proto = -1;
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ccp->in.algorithm = -1;
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}
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} else if (dec->nakend != dec->nak) {
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/* then NAKs */
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dec->ackend = dec->ack;
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if (ccp->in.state == NULL) {
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ccp->his_proto = -1;
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ccp->in.algorithm = -1;
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}
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}
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|
}
|
|
|
|
void
|
|
CcpInput(struct ccp *ccp, struct bundle *bundle, struct mbuf *bp)
|
|
{
|
|
/* Got PROTO_CCP from link */
|
|
if (bundle_Phase(bundle) == PHASE_NETWORK)
|
|
FsmInput(&ccp->fsm, bp);
|
|
else if (bundle_Phase(bundle) < PHASE_NETWORK) {
|
|
LogPrintf(LogCCP, "Error: Unexpected CCP in phase %s (ignored)\n",
|
|
bundle_PhaseName(bundle));
|
|
pfree(bp);
|
|
}
|
|
}
|
|
|
|
static void
|
|
CcpRecvResetAck(struct fsm *fp, u_char id)
|
|
{
|
|
/* Got a reset ACK, reset incoming dictionary */
|
|
struct ccp *ccp = fsm2ccp(fp);
|
|
|
|
if (ccp->reset_sent != -1) {
|
|
if (id != ccp->reset_sent) {
|
|
LogPrintf(LogWARN, "CCP: Incorrect ResetAck (id %d, not %d) ignored\n",
|
|
id, ccp->reset_sent);
|
|
return;
|
|
}
|
|
/* Whaddaya know - a correct reset ack */
|
|
} else if (id == ccp->last_reset)
|
|
LogPrintf(LogCCP, "Duplicate ResetAck (resetting again)\n");
|
|
else {
|
|
LogPrintf(LogWARN, "CCP: Unexpected ResetAck (id %d) ignored\n", id);
|
|
return;
|
|
}
|
|
|
|
ccp->last_reset = ccp->reset_sent;
|
|
ccp->reset_sent = -1;
|
|
if (ccp->in.state != NULL)
|
|
(*algorithm[ccp->in.algorithm]->i.Reset)(ccp->in.state);
|
|
}
|
|
|
|
int
|
|
ccp_Compress(struct ccp *ccp, struct link *l, int pri, u_short proto,
|
|
struct mbuf *m)
|
|
{
|
|
/* Compress outgoing Network Layer data */
|
|
if ((proto & 0xfff1) == 0x21 && ccp->fsm.state == ST_OPENED &&
|
|
ccp->out.state != NULL)
|
|
return (*algorithm[ccp->out.algorithm]->o.Write)
|
|
(ccp->out.state, ccp, l, pri, proto, m);
|
|
return 0;
|
|
}
|
|
|
|
struct mbuf *
|
|
ccp_Decompress(struct ccp *ccp, u_short *proto, struct mbuf *bp)
|
|
{
|
|
/*
|
|
* If proto isn't PROTO_COMPD, we still want to pass it to the
|
|
* decompression routines so that the dictionary's updated
|
|
*/
|
|
if (ccp->fsm.state == ST_OPENED)
|
|
if (*proto == PROTO_COMPD) {
|
|
/* Decompress incoming data */
|
|
if (ccp->reset_sent != -1)
|
|
/* Send another REQ and put the packet in the bit bucket */
|
|
FsmOutput(&ccp->fsm, CODE_RESETREQ, ccp->reset_sent, NULL, 0);
|
|
else if (ccp->in.state != NULL)
|
|
return (*algorithm[ccp->in.algorithm]->i.Read)
|
|
(ccp->in.state, ccp, proto, bp);
|
|
pfree(bp);
|
|
bp = NULL;
|
|
} else if ((*proto & 0xfff1) == 0x21 && ccp->in.state != NULL)
|
|
/* Add incoming Network Layer traffic to our dictionary */
|
|
(*algorithm[ccp->in.algorithm]->i.DictSetup)
|
|
(ccp->in.state, ccp, *proto, bp);
|
|
|
|
return bp;
|
|
}
|